• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An apparatus for moving a trailer is disclosed. The apparatus has a first assembly which can be secured to the trailer, and a second assembly which is connectable and disconnectable relative to the trailer by being connected to, and disconnected from, the first assembly. The apparatus further includes a traction roller which can engage with a wheel (or tyre) of the trailer, and an electric motor which is part of, or is associated with, the second assembly and so can be connected and disconnected relative to the trailer. The electric motor is operable to drive the traction roller when the second assembly is connected relative to the trailer.
    公开号:AU2013200173A1
    申请号:U2013200173
    申请日:2013-01-14
    公开日:2013-08-01
    发明作者:Simon Goode；Malcolm Hill；James Lee
    申请人:PURPLE LINE Pty Ltd；
    IPC主号:B60S9-215
    专利说明:
    I APPARATUS FOR MOVING A TRAILER TECHNICAL FIELD [0001] The present invention relates to apparatus for moving trailers. BACKGROUND [0002] Trailers are typically non-motorised wheeled devices which are moved by being hitched to, and towed behind, an automobile. Trailers come in many forms. For example, some trailers have a simple tray for carrying loads. Other trailers such as "box trailers" have cage-like walls to allow loads to be stacked higher on the trailer. Trailers are often also designed to carry specific things. For example, there are trailers which are specifically designed to carry boats, jet skis, kayaks/canoes, motorcycles, cars, etc. The term trailer also encompasses such things as caravans, camper vans, horse floats and the like. [0003] As mentioned above, a trailer typically operates to carry its load by being towed behind an automobile. However, there are often instances where it is not practical to tow the trailer in this way, for example when moving the trailer a short distance, or when repositioning the trailer or moving the trailer in a confined space. In such instances, it is common for the trailer to be moved manually (e.g. a person physically grips the trailer and drags or pushes it into position). However, moving trailers manually is very often labour intensive and indeed may be extremely difficult, especially with a heavy trailer, or on uneven or inclined ground. [0004] Various devices have been devised to assist in such situations. These include manually driven jockey wheels and motorised jockey wheels. However, these typically have small wheels, which may encounter problems, particularly on rough terrain. [0005] Other devices which have previously been devised use motorised rollers to drive the wheels of the trailer. The rollers in these devices (referred to as traction rollers) are driven by electric motors and, in general, one driven traction roller is brought into engagement with the tyre on one of the trailer wheels. Then, when the electric motor is operated to turn the traction roller, the rotation of the traction roller is imparted into, and causes rotation of, the trailer wheel. One or more wheels on either side of the trailer may be driven in this way in a controlled manner, thus enabling the trailer to be moved and steered. An example of one such device is given in Australian Patent Application No 2007214367. [0006] One difficulty with the devices described in the previous paragraph is that the electric motors which drive the traction rollers are typically fixed to the trailer near the trailer wheels, often being fixed to the trailer's frame or undercarriage close to the trailer wheels. This can be a problem particularly for trailers which are exposed to water. For example, with boat trailers (or jet ski trailers etc), it is typically necessary to reverse the trailer into water (using the automobile) in order to unload the boat into the water, and also to load the boat back onto the trailer after use. This typically means that the wheels and/or parts of the trailer frame/structure are at least partially immersed or submerged in water (often salt water). The devices described in the previous paragraph cannot be used in situations where there is a possibility that the electric motor could become submerged or otherwise exposed to or damaged by water. [0007] The above problem is not necessarily restricted to boat and jet ski trailers either. It could also be an issue, for example, for four-wheel-drive camping trailers which may often be required to ford creeks and streams whereupon the wheels and/or frame of the trailer may become at least partially submerged. Those skilled in the art will recognise that this could also be an issue for other forms of trailers. [0008] It is to be clearly understood that mere reference herein to previous or existing products, practices, publications or other information, or to any associated problems or issues, does not constitute an acknowledgement or admission that any of those things individually or in any combination formed part of the common general knowledge of those skilled in the field or are admissible prior art. SUMMARY OF THE INVENTION [0009] In a first aspect the invention comprises apparatus for moving a trailer comprising a traction roller which can be secured relative to the trailer and which can engage with a wheel of the trailer, and an electric motor for driving the traction roller, wherein at least the electric motor is disconnectable relative to the trailer. [0010] In a second aspect the invention comprises apparatus for moving a trailer comprising a first assembly secured to the trailer and a second assembly removably attachable to the first assembly, wherein the second assembly comprises a traction roller which engages a wheel of the trailer and an electric motor to drive the traction roller. [0011] In a possible embodiment, the invention may provide an apparatus for moving a trailer, the apparatus including a first assembly which can be secured to the trailer, and a second assembly which is connectable and disconnectable relative to the trailer, the apparatus further -j including a traction roller which can engage with a wheel (or tyre or axle) of the trailer, and an electric motor which is part of, or is associated with, the second assembly and so can be connected and disconnected relative to the trailer, the electric motor being operable to drive the traction roller when the second assembly is connected relative to the trailer. BRIEF DESCRIPTION OF THE DRAWINGS [0012] Preferred features, embodiments and variations of the invention may be discerned from the following Detailed Description which provides sufficient information for those skilled in the art to perform the invention. The Detailed Description is not to be regarded as limiting the scope of the preceding Summary of the Invention in any way. The Detailed Description will make reference to a number of drawings as follows: [0013] Figure 1 is a perspective view of a trailer moving apparatus in accordance with a first embodiment of the invention. [0014] Figure 2 is similar to Figure 1 except that the covers which are opaque in Figure 1 are shown transparently in Figure 2 to reveal the components underneath. [0015] Figure 3 is similar to Figures 1 and 2 except that the covers shown in Figures 1 and 2 are omitted. [0016] Figure 4 is similar to Figure 3 except that the structural support component is omitted and the track component is shown transparently to reveal components underneath. [0017] Figure 5 is similar to Figure 4 except that the track component has further been omitted, and certain parts of the extender (which are opaque in the earlier Figures) are shown transparently. [0018] Figure 6 illustrates the way the removable assembly (which includes the motor, gearbox, traction roller, etc) can be disconnected from the fixed assembly (which is secured to the trailer). [0019] Figure 7 is a perspective view of the removable assembly. [0020] Figure 8 is another perspective view of the removable assembly with the turn knob and the locking tab rotated into the locking position. [0021] Figure 9 is similar to Figure 7 except that the covers of the removable assembly -r which are shown in Figure 7 are omitted, and the mounting block is also shown transparently. [0022] Figure 10 is a schematic illustration of a remote control which could be used to control the apparatus. [0023] Figure 11 is a perspective view of a trailer moving apparatus in accordance with a second embodiment of the invention. [0024] Figure 12 is a perspective view of the fixed assembly of the second embodiment of the invention. [0025] Figure 13 is a perspective view of the removable assembly of the second embodiment of the invention in a retracted position. [0026] Figure 14 is a perspective view of the removable assembly of the second embodiment of the invention in an extended position. [0027] Figure 15 is similar to Figure 14 except that various components are shown transparent. [0028] Figure 16 is similar to Figure 14 except that various components are shown transparent and some components have been hidden. DETAILED DESCRIPTION OF THE INVENTION [0029] The present invention may potentially be used on trailers of any kind. It is envisaged that the invention will usually be used on trailers which are adapted to be towed behind an automobile. However, no limitation is to be implied from this, and the invention could also be used on other forms of trailers as well. It should also be recalled that the term trailer covers such things as caravans, boat and jet ski trailers, camper vans, horse floats and the like. [0030] It is considered that the benefits of the invention may be readily recognised and/or realised, for example, when the apparatus is used on trailers which are, or may be, at least partially immersed or submerged in water on occasions (e.g. boat and jet ski trailers etc). However, again, no limitation is to be implied from this, and the invention could equally be used on trailers which are never intended to be submerged or exposed to water. For example, benefits of the invention may also be recognisable and/or realisable when the apparatus is installed on trailers intended for use on rough terrain, or in dusty or other high-wear environment. In such circumstances it may be desirable to remove the electric motor and other fragile parts of the apparatus (these may be part of, or associated with, the apparatus' second assembly) to prevent them from being damaged by impacts or dust etc while the trailer is being towed. [0031] As mentioned above, apparatuses in accordance with the invention include a traction roller which can engage with a wheel (or tyre or axle) of the trailer. Typically, there will be one traction roller which engages with a given wheel (or tyre or axle) of the trailer. In other words, there will typically be a single traction roller which can engage with a trailer wheel (a single traction roller per apparatus). However, embodiments may also be possible where multiple traction rollers engage with a given wheel (or tyre or axle); i.e. multiple traction rollers per apparatus. For convenience, the invention will be described hereafter with reference to embodiments where each apparatus has a single traction roller that can engage with a given tyre of the trailer. However, no limitation of the invention is to be implied from this. The terms "tyre" and "wheel" will therefore be used interchangeably from here on. [0032] The traction roller on each apparatus should be round (it will generally be cylindrical) so that when it is brought into contact with the trailer wheel and rotated, the rotation is imparted into the trailer wheel thus driving the trailer wheel. The parts or surfaces of the traction roller which can contact with the trailer wheel (typically the round/curved exterior surface) may be provided with means for increasing friction between the roller and the wheel. Any friction increasing means may be used, for example, high friction surfaces or coatings, ridges or contours on or applied to the surface of the roller, etc. [0033] As mentioned above, some embodiments of the invention may comprise a first assembly which can be secured to the trailer, and a second assembly which includes the electric motor and is connectable and disconnectable relative to the trailer. In such embodiments, the traction roller could potentially be configured as a part of either assembly. If the traction roller is part of the second assembly, the traction roller will be connectable and disconnectable relative to the trailer along with the electric motor (and any other components associated with the second assembly). On the other hand, if the traction roller is part of the first assembly, it will remain secured to the trailer (at least while the first assembly is secured to the trailer). [0034] For convenience, the invention will be described hereafter with reference to embodiments which include a first and second assembly, and where the traction roller is part of the second, removable, assembly. However, it is to be clearly understood that no limitation is to be implied from this. [0035] The first assembly can be secured to the trailer in any suitable way. It is envisaged that, often, the first assembly may include a structural member or other part (or parts) with bolts (or holes for receiving bolts) to enable the first assembly to bolt to the trailer frame. However, any other means for securing the first assembly to the trailer could also be used. Other possibilities include shackles, brackets, clamps, etc. It is also possible that the first assembly could be welded to the trailer frame. However, this would be permanent and would, for example, prevent the first assembly from being swapped onto a different trailer. It may therefore be preferable for the first assembly to be secured to the trailer frame using means that do not involve welding or which allow disconnection. It may also be preferable to use means which do not involve significant drilling or other interference with structural parts of the trailer (so that the strength of the trailer is not compromised). [0036] Nevertheless, as the first assembly will generally remain secured to the trailer (except, for example, if it is removed to be installed on a different trailer), the first assembly should therefore be secured in a way that cannot easily become loose or dislodged (e.g. by vibrations as the trailer is being towed etc). [0037] In the presently-described embodiments which include a first and second assembly, the second assembly is connectable and disconnectable relative to the trailer. Often, the second assembly (including the traction roller) will be connectable and disconnectable relative to the trailer by being connectable to, and disconnectable from, the first assembly. Of course, the second assembly could alternatively be configured to connect to, and disconnect from, part of the trailer itself (e.g. a part of the trailer frame). However, for convenience, further explanation will be given with reference to embodiments where the second assembly is connectable to, and disconnectable from, the first assembly. [0038] The second assembly may be configured to connect to, and disconnect from, the first assembly in any suitable way or using any suitable means. Whatever means are used, the second assembly should be securable to the first assembly when it is connected thereto. This may ensure that the second assembly cannot become disconnected or dislodged from the first assembly except when intentionally disconnected therefrom by the user. A range of means and mechanisms may be used to achieve this, all of which are considered to fall within the scope of the invention. Preferably, means which enable quick and easy connection and disconnection by a user will be used. A range of "quick release" mechanisms may therefore be used. [0039] In some possible embodiments, the second assembly may include a part or portion which protrudes relative to other parts of the second assembly. The first assembly may also have a space or opening in or within which the protruding part or portion of the second assembly can be received when the second assembly is connected to the first assembly. The protruding part or portion of the second assembly may comprise, for example, a mounting post, and the space or opening in the first assembly may comprise an aperture extending into, or through, the first assembly. The mounting post may be received in the said aperture when the second assembly is connected to the first assembly. [0040] In embodiments such as those described in the previous paragraph, when the mounting post of the second assembly is received in the aperture in the first assembly, the mounting post may be securable therein. This may be achieved using a range of different means or mechanisms. For example, the aperture in the first assembly may extend all the way through the part of the first assembly in which it is formed, and the mounting post may extend all the way through the aperture when inserted therein. The mounting post may further have a rotating component (rotatable relative to the mounting post). The rotating component may be located on the end of the mounting post which projects out through the opposite side of the aperture when the mounting post is inserted in the aperture. The rotating component may be shaped so that it can be turned into a position in which it does not prevent the mounting post from being inserted into, and withdraw out of, the aperture (i.e. it can be turned into a position which allows the second assembly to be connected to, and disconnected from, the first assembly). However, the shape of the rotating component may also be such that, when the mounting post is inserted through the aperture in the first assembly, the rotating component may be turned into a position in which it prevents the mounting post from then being withdrawn back out of the aperture, thus preventing the second assembly from being disconnected from the first assembly. In order to disconnect the second assembly from the first assembly, the rotating component must be turned back into the position in which it allows the mounting post to be withdrawn from the aperture, and thereafter the mounting post can be withdrawn. [0041] In another possible embodiment, the rotating component could be located part-way along the mounting post, and the aperture in the first assembly could include a lateral slot. In this case, the mounting post need not necessarily extend all the way through the aperture, and the aperture need not necessarily extend all the way through the first assembly. The lateral slot may be provided inside the first assembly and it may open into the aperture. Hence, the rotating component could again be rotated into a position in which it allows the mounting post to be inserted into, and withdrawn out of, the aperture. However, once the mounting post has been inserted into the aperture to connect the second assembly to the first assembly, the rotating component could be turned into a position wherein one or more parts of the rotating component 0 insert into, or engage with, the lateral slot inside the first assembly thereby preventing the mounting post from being withdrawn out of the aperture. Again, in order to disconnect the second assembly from the first assembly, the rotating component may be turned back into the position in which it allows the mounting post to be withdrawn from the aperture, and thereafter the mounting post can be withdrawn. [0042] In the example embodiments described above which include a rotating component for securing the second assembly relative to the first assembly, a handle or turn knob or the like may be provided to enable a user to turn the rotating component by hand. This may enable the second assembly to be connected to, and disconnected from, the first assembly without the need for tools etc. Alternatively, the arrangement may be such that a user can turn the rotating component to lock and unlock the second assembly relative to the first assembly using a spanner, socket or the like, or some other tool or mechanism. [0043] A range of other configurations for allowing the second assembly to be releasably securable to the first assembly (i.e. other than those described above) are also possible, all of which are considered to fall within the scope of the invention. [0044] Apparatuses in accordance with the invention may also be provided with extension means. When the second assembly, including the traction roller, is connected to the first assembly, the extension means may be operable to move the traction roller into engagement with the tyre of the trailer. Once the traction roller has been moved into engagement with the trailer tyre, the traction roller may be turned (by the electric motor etc) to thereby drive rotation of the trailer wheel. The extension means may also be operable to retract the traction roller away from the trailer tyre (i.e. so that the traction roller disengages from the tyre), for example, so that the second assembly can be disconnected from the first assembly. [0045] Often, the extension means may be part of, or associated with, the first assembly. For example, in some embodiments, the extension means may operate such that the part of the first assembly to which the second assembly connects can be moved towards, and away from, the trailer tyre. In such embodiments, when the second assembly is connected to the said part of the first assembly, the extension means can be operated to move the second assembly (including the traction roller) towards, and away from, the trailer tyre. The extension means can therefore be used to engage the traction roller with, and disengage it from, the trailer tyre. [0046] The extension means may take any suitable form. In some embodiments, the extension means may include an extender component which moves forward and back to engage the traction roller with, and disengage it from, the trailer tyre. In such embodiments, the second assembly will generally therefore attach to a part of the extender component. The extender component may be extendable and retractable relative to the fixed location at which the first assembly connects to the trailer frame/structure. [0047] In the embodiments described in the previous paragraph in which the extension means includes an extender component, means may further be provided for moving the extender component relative to part (or parts) of the first assembly which connect to the trailer frame/structure. Any suitable means may be used for this. For example, in some embodiments, an arrangement of gears linked to the extender component may be utilised. Such a geared arrangement may be provided with an input for enabling the user to operate the geared arrangement. The input could be, for example, a part which the user can turn using a spanner, socket or similar tool to thereby turn the gears of the geared arrangement. Turning the input in one direction may turn the gears one way, and turning the input in the opposite direction may turn the gears the other way. Furthermore, turning the input in one direction may therefore cause the extender component to extend towards the trailer tyre, and turning the input in the other direction may cause the extender component to retract away from the trailer tyre. Therefore, in these embodiments, when the second assembly is connected to the extender component, the geared arrangement may be used to extend and retract the traction roller. [0048] As discussed above, apparatuses in accordance with the invention include an electric motor which is operable to drive the traction roller. However, as also mentioned above, the invention is explained herein (for convenience only) mostly with reference to embodiments where the electric motor and the traction roller both form part of the second assembly. [0049] The kind of electric motor used is not narrowly critical. In other words, any suitable electric motor may be used. It is envisaged that the electric motor may often be one designed to operate using a 12 volt power supply. However, this is only because 12 V batteries and power supplies are the most common power supplies associated with automobiles and trailers etc. Therefore, the motor could alternatively be powered by, for example, mains power or some other power supply. [0050] There may also be a gearbox associated with the electric motor. Any kind of gearbox may be used. The input to the gearbox may be connected to the output of the electric motor. The output of the gearbox may be connected to the traction roller. Therefore, the gearbox may operate to convert the torque generated by the electric motor into a torque sufficient for the traction roller to drive the trailer wheel. [0051] Apparatuses in accordance with the invention may also include various electrical connection components. For example, an electrical cable or the like may be provided to deliver power to the electric motor (the apparatus will not normally have a battery or power supply mounted to it). The electrical cable may deliver power from any suitable power source, for example, a 12 V vehicle or trailer battery, or alternatively from the mains power supply etc. A suitable transformer may be provided if necessary. Suitable connectors etc may also be provided to enable connection of the power cable to the apparatus (power is delivered to the motor). [0052] Control means may also be provided. Often, the control means may include a remote control (i.e. so that the user can operate the apparatus by remote control). The remote control may use radio frequency (RF) communication to communicate with a control unit. The control unit may be mounted to, or nearby, the power source. As an example, if the apparatus is installed on a boat trailer, the power source used to power the apparatus may be the boat battery. In this case, the control unit may be located on the boat, possibly nearby the boat battery. The control unit may receive control signals from the remote control, and it may then control the way that power/current is delivered to the electric motor to drive the traction roller. [0053] Any of the features described herein can be combined in any combination with any one or more of the other features described herein within the scope of the invention. [0054] Two embodiments of the invention will now be described, the first embodiment as shown in Figures 1 to 10 and the second embodiment in Figures 11 to 16. [0055] As mentioned above, Figure 1 is a perspective view of a trailer moving apparatus in accordance with one embodiment of the invention. The apparatus is made up of two main assemblies, namely a first assembly in the form of a fixed assembly 10, and a second assembly in the form of a removable assembly 100. The fixed assembly 10 is securable to the frame of a trailer (not shown) and can remain mounted to the trailer. The removable assembly 100 includes the traction roller which engages with the tyre of the trailer wheel to drive the trailer wheel. The removable assembly 100 also includes, inter alia, an electric motor and gearbox for driving the traction roller, and a mechanism for connecting to the fixed assembly 10. These components of the removable assembly 100, and their operation, will be discussed below. [0056] In the previous paragraph, it was mentioned that the fixed assembly 10 can remain mounted to the trailer frame. This is not to say that the fixed assembly 10 cannot also be removed from the trailer. On the contrary, it will often also be possible to disconnect the fixed assembly 10 from the trailer frame, for example, if the apparatus is to be mounted for use on a different trailer. However, when the apparatus is installed for use on a particular trailer, the fixed assembly 10 remains mounted to the frame of that trailer, and the removable assembly 100 can be connected to, and disconnected from, the fixed assembly 10. [0057] In Figure 1, the removable assembly 100 is shown connected to the fixed assembly 10. In this configuration, the apparatus can be operated to move the traction roller into engagement with the tyre of the trailer wheel, and thereafter the traction roller can be driven by the electric motor to drive the trailer wheel. In contrast to Figure 1, Figure 6 shows the removable assembly 100 disconnected from the fixed assembly 10. In this configuration, the electric motor and other components which might otherwise be damaged, for example, by submersion or exposure to water are removed from the trailer (the fixed assembly 10 remains mounted to the trailer) and therefore the trailer can be driven through or into water without risking damage to the apparatus. The way in which the removable assembly 100 can be connected to, and disconnected from, the fixed assembly 10 will be discussed below. [0058] Figures 2 and 3 are similar to Figure 1 except that the covers which are opaque in Figure 1 are shown transparently in Figure 2 and are omitted altogether in Figure 3. From Figures 2 and 3, it can be seen that the fixed assembly 10 includes a mounting member 12, a worm gear arrangement 20, an extender 40 and a track component 60 - no longer relevant. The mounting member 12 is the component which connects to the trailer frame (not shown). In other words, the fixed assembly 10 is connected to the trailer via the mounting member 12. Typically, one or more holes (not shown) may be provided in the mounting member 12 to enable the mounting member 12 to be bolted to the trailer frame. Other alternative means might also be used for securing the mounting member 12 to the trailer frame, for example, mechanical clamps or brackets. It is also possible that the mounting member 12 could be welded to the trailer frame, although it would not then be possible to disconnect the fixed assembly 10 from the trailer. For this reason, it is considered preferable that the mounting member 12 be secured to the trailer frame using means that do not involve welding or which allow disconnection (and preferably also means which do not involve significant drilling of structural parts of the trailer frame). [0059] The particular embodiment of the apparatus shown in the Figures is configured for installation on the left-hand side of a trailer. More specifically, it is configured for installation behind the wheel (or behind the rear wheel) on the left-hand side of the trailer. Hence, the extender 40 extends forward towards the trailer wheel from the point where the mounting I Z. member 12 connects to the trailer frame. Thus, when the removable assembly 100 is connected to the fixed assembly 10 for use (as shown in Figures 1-5), the traction roller shown can be moved into engagement with the tyre on the rearward side of the trailer's wheel. [0060] It should be noted that other configurations and embodiments are also possible, including embodiments which are configured for installation on the right-hand side of a trailer. In fact, in relation to the embodiment shown in the Figures, the trailer will actually have the apparatus illustrated in the Figures installed on the left-hand side, and on the right-hand side an apparatus will be installed which is substantially identical but a mirror image of the one illustrated. There will therefore be an apparatus installed on both sides of the trailer so that wheels on either side of the trailer can be driven. Of course, at different times, one side may be driven more or less than the other, and in this way the trailer may be steered into the position. [0061] Typically, irrespective of which side of the trailer a particular apparatus is installed on, the apparatus will be installed behind the trailer wheel (or behind the rear wheel) on that side of the trailer. However, it is also possible that the apparatus (or alternative configurations/apparatuses in accordance with the invention) could be installed forward of the trailer wheel (or forward of the front wheel) on one side or other of the trailer, and in this case the traction roller would engage the tyre on the forward side of the wheel. [0062] The track component 60 is fixedly connected to the underside of the mounting member 12. This is most clearly visible in Figure 3. The box section 21 within which the worm gear arrangement 20 is mounted is fixedly connected on one end of the track component 60 (on the opposite side relative to the extender 40). Consequently, when the fixed assembly 10 is mounted to the trailer frame, the mounting member 12, the track component 60 and the worm gear arrangement 20 are all secured in fixed relation relative to the trailer and relative to each other. The covers of the fixed assembly 10 are also secured in position, as illustrated in Figures 1 and 2. [0063] Referring next to Figure 4, in this figure the mounting member 12 is omitted and the track component 60 is shown transparently. It can therefore be seen that the track component 60 comprises, in effect, an inverted channel. The walls on either side of the track component 60 also each form an inward-facing C-shape (i.e. the walls on either side of the channel are generally C shaped in cross-section). [0064] Part of the upper surface of extender 40 is positioned within the channel in the track component 60, between the said C-shaped walls. However, more significantly, Figure 4 1 illustrates that the extender 40 has a pair of rails 42. In fact, there is a rail 42 secured to either side of the extender 40. Each rail 42 is received and retained within a respective one of the C shaped sides of the track component 60. Because of the way the rails 42 are retained within the respective C-shaped sides, the extender 40 is prevented from falling vertically out of engagement with the track component 60. Also, the rails 42 are able to slide longitudinally back and forth within the respective C-shaped sides. Consequently, the entire extender 40 is able to slide forward and back relative to the track component 60. The track component 60 therefore not only prevents the extender 40 from falling vertically downwards away from the track component 60, but it also operates as a guide or "track" within which the rails 42 and the extender 40 can slide. The reason why the extender 40 moves forward and back, and the way in which this is achieved, are discussed below. [0065] Referring next to the worm gear arrangement 20, as mentioned above, this is mounted within a box section 21. The arrangement 20 has a hexagonal head 22 (similar to a conventional bolt head) positioned outside the box section 21. The arrangement 20 can therefore be operated by turning the head 22 using a conventional spanner/wrench or socket (or using an electrically or pneumatically powered tool having a socket attachment etc). The head 22 is connected to a spindle (not visible) such that turning the head 22 turns the spindle. The spindle extends through holes in the wall of the box section 21. Mounted midway along the spindle, inside the box section 21, is a component 23. In the Figures, component 23 resembles a cylindrical component. However, this is merely a schematic representation. In fact, the component 23 is a worm gear with a helical thread (the thread is not shown). Mounted beneath worm gear 23 is second gear (this second gear is not visible because it is hidden from view by the worm gear 23). The second gear is fixedly mounted on drive rod 25 and also meshes with the worm gear 23. Therefore, rotation of the worm gear 23 (which is caused by turning the head 22) causes the second gear to rotate which in turn causes the drive rod 25 to rotate. Naturally, turning the head 22 (and hence the worm gear 23) in one direction causes the drive rod 25 to rotate one way, and turning the head 22 (and worm gear 23) in the other direction causes the drive rod 25 to rotate the other way. [0066] Referring next to Figure 5 (in which the extender 40 is shown transparently) it can be seen that the extender 40 comprises a substantially hollow elongate box section. It can also be seen that the drive rod 25 has a portion 26 which extends into the inside of the extender 40. In fact, there is a coupling component 43 which is fixedly mounted to the end of the extender 40. The coupling component 43 has a round portion which is fixed on the outside of the extender 40. The coupling component 43 also has a cylindrical portion which inserts through a hole in the end of the extender 40. [0067] The coupling component 43 also has an internal bore extending axially therethrough. The internal bore through the coupling component is not visible in the Figures because the portion 26 of the drive rod 25 is received therein (the portion 26 of the drive rod 25 inserts all the way through the bore and projects further into the inside of the extender 40). In fact, the internal bore in the coupling component 43 is a threaded "female" throughbore, and the portion 26 of the drive rod 25 which inserts through that throughbore has a corresponding external thread (the portion 26 therefore forms a "male" threaded rod which is screwed into the female throughbore). [0068] Recall from above that rotation of the worm gear 23 (caused by turning the head 22) causes the drive rod 25 to rotate. Therefore, because of the threaded engagement between the threaded portion 26 of drive rod and the internal threaded bore in coupling component 43, rotation of the drive rod 25 causes the coupling component 43 (and indeed the entire extender 40) to move along the threaded portion 26 of the drive rod. Naturally, turning the drive rod in one direction causes the extender 40 to move longitudinal in one direction (e.g. forward), and turning the drive rod in the other direction causes the extender 40 to move longitudinal in the other direction (e.g. back). This is how the extender 40 is extended, and retracted, to move the traction roller into, and out of, engagement with the tyre of the trailer wheel. [0069] In other words, when it is desired to use the apparatus to move the trailer, the removable assembly 100 is first connected to the fixed assembly 10 (this will be discussed further below) such that the electric motor and the traction roller etc are connected to the distal end of the extender 40 as shown in Figures 1-5. Then, the head 22 of the worm gear arrangement 20 can be rotated to thereby move the extender 40 longitudinally forward, thus moving the traction roller forward into engagement with the trailer tyre. The electric motor can then be operated to turn the traction roller and hence move the trailer. After the trailer has been moved into the appropriate position, the head 22 of the worm gear arrangement can be rotated in the opposite direction to thereby retract the extender 40 away from the tyre, thus disengaging the traction roller from the tyre. The removable assembly 100 can then be disconnected from the fixed assembly 10. [0070] The removable assembly 100 will now be described with reference to Figures 7-9. In Figures 7 and 8, the housings containing the motor and the gearbox are hidden from view by the covers. However, these housings are visible in Figure 9 (the covers are omitted in Figure 9). Therefore, from Figure 9, it can be seen that the removable assembly 100 includes (in addition to I1-) the covers) the traction roller 110, a housing 120 containing the gearbox, a housing 130 containing the electric motor, a mounting block 140 and a locking assembly including locking tab 150. [0071] The traction roller 110 is an elongate cylindrical component with a series of ridges on its exterior surface. The ridges provide improved grip/friction when the roller engages with the trailer tyre. The traction roller 110 is rotatably mounted to the side of the gearbox and is held in place by roller retaining arm 111. The retaining arm 111 is bolted to the side of the gearbox housing 120, near where the roller 110 connects to the gearbox, and the arm 111 extends around behind the roller and connects to the other end of the roller to thereby hold the roller in position. [0072] The internal workings of the gearbox (inside housing 120) are not shown and will not be described. Gearboxes of this type are common and will be understood by those skilled in the art. The traction roller 110 is connected to the output of the gearbox so that rotation generated by the electric motor is transmitted through the gearbox to cause rotation of the traction roller 110. The internal workings of the electric motor (inside housing 130) are also not shown and will not be described. Again, electric motors this type are common and those skilled in the art will appreciate that the output (or output shaft) of the electric motor connects to the input of the gearbox so that rotation generated by electric motor is transmitted into the gearbox and through the gearbox to drive the traction roller 110. [0073] As mentioned above, the removable assembly 100 also includes a mounting block 140. The mounting block 140 is secured to the top of the gearbox housing 120. In this embodiment, the mounting block 140 is bolted to the gearbox housing 120. The mounting block 140 is shown transparently in Figure 9 and the holes 141 in the mounting block 140 which allow bolts to be inserted to bolt the mounting block 140 to the gearbox housing 120 are clearly visible. [0074] Figures 7-9 also show that the mounting block 140 has a mounting post 145 extending horizontally from one side (the right-hand side) thereof. The mounting post 145 is also visible in Figure 6. It can also be seen from Figure 6 that the cross-sectional shape of the mounting post 145 corresponds to the shape of an opening 45 which extends transversely through the end of the extender 40. Therefore, to connect the removable assembly 100 to the fixed assembly 10, the removable assembly 100 is positioned so that the mounting post 145 of the mounting block 140 inserts into the opening 45 in the end of extender 40. Inserting the mounting post 145 into the opening 45 connects the removable assembly 100 to the fixed assembly 10 as shown in Figures 1-5.
    I %J [0075] The mounting post 145 can then be secured within the opening 45 (thus securing the removable assembly 100 to the fixed assembly 10) using the locking assembly. The locking assembly includes the locking tab 150, a locking spindle 151 which resides in a bore extending through the thickness of mounting post 145 and mounting block 140 (see Figure 9), and a turn knob 153 which is mounted on the opposite end of the spindle 151 to locking tab 150. The turn knob 153, spindle 151 and tab 150 are all fixedly connected together such that turning the turn knob 153 causes the spindle 151 and the tab 150 to rotate by the same amount. [0076] It can be seen that the shape of the locking tab 150 corresponds to the cross-sectional shape of the mounting post 145 (this is also substantially the same as the cross-sectional shape of the opening 45 in the extender 40). Therefore, when the mounting post 145 is to be inserted into the opening 45 (to connect the removable assembly 100 to the fixed assembly 10) the turn knob 153 is rotated so that the locking tab 150 becomes aligned with a cross-section of the mounting post 145. This allows the mounting post 145 to be inserted into the opening 45 in the end of the extender 40 such that the tab 150 projects out the other side of the opening 45. Once the mounting post 145 is inserted fully into the opening 45 with the locking tab 150 thus positioned outside the opening 45 on the other side of the extender 40, the locking tab assembly can be used to secure the mounting post 145 therein (and thus secure the removable assembly 100 to the fixed assembly 10). This is achieved by rotating the turn knob 153 through approximately 900 such that the locking tab 150 adopts the position (the locking position) shown in Figure 8. When the mounting post 145 is fully inserted and the locking tab 150 is turned into the locking position, the locking tab 150 becomes misaligned relative to the mounting post 145 and the opening 45. As a consequence, the locking tab 150 engages with the outside surface on the opposite side of the extender 40 and thereby prevents the mounting post 145 from being withdrawn back out of opening 45. This is how the removable assembly 100 is secured to the fixed assembly 10. Of course, when it is desired to disconnect the removable assembly 100 from the fixed assembly 10, the turn knob 153 can be turned so as to align the locking tab 150 with the mounting post 145 and the opening 45, thus allowing the mounting post 145 to withdraw out of the opening 45. [0077] It will be appreciated that the removable assembly 100 should be connected to, and disconnected from, the fixed assembly 10 with the extender 40 in a retracted position. That is, the removable assembly 100 should be connected, or disconnected, when the worm gear arrangement 20 is operated to retract the extender 40 away from the trailer tyre. Otherwise there is a possibility that the traction roller 110 or other parts of the removable assembly 100 may 1 / collide with the trailer tyre, and this may make it difficult or impossible to connect, or disconnect, the removable assembly 100. [0078] The apparatus also includes a number of electrical connection and control components including an electrical socket 170, a pin housing 180, an electrical supply cable (not illustrated), a control unit (not illustrated) and a remote control (illustrated in Figure 10). The electrical socket 170 is bolted to the side of the extender 40, just rearward of the opening 45, as shown in Figure 6. The electrical socket 170 therefore forms part of the fixed assembly 10. The pin housing 180 is bolted to the rearward side of the mounting block 140 and is therefore part of the removable assembly 100. [0079] The pin housing 180 has a pair of spring loaded, electrically conducting pins 181 projecting therefrom. The pins 181 are electrically connected to the electric motor. When the removable assembly 100 is connected to the fixed assembly 10 as described above, the pins 181 each insert into one of the corresponding holes 171 in the electrical socket 170. When the pins 181 insert into the holes 171, they each connect with a conducting plate located within the respective said holes 171 (the conducting plates are not visible). An electrical cable (not shown) is also provided which has electrical terminals which insert into the rearward-facing holes 172 in the socket 170. The electrical cable therefore delivers power into the socket 170. The electricity delivered by the cable is then conducted via the respective conducting plates in the socket 170 into the respective pins 181 and thus into the electric motor. This is how electrical power be delivered to drive the electric motor. [0080] The electrical cable may deliver power from a range of power sources. For example, in situations where the trailer is a boat trailer, the electrical cable may be directly connectable to the boat battery. Therefore, when the boat is loaded on the trailer, power from the boat battery may be used to directly power the trailer moving apparatus, thereby enabling the trailer to be manoeuvred. In other embodiments, the trailer may have its own battery which can be used to power the trailer moving apparatus as, or a separate alternative power source may be utilised. [0081] The one or more trailer moving apparatus on a given trailer may be controlled by remote control. An example hand held remote control is illustrated in Figure 10. The remote control may use radio frequency (RF) communication to communicate with a control unit (not shown). The control unit may be mounted to, or nearby, the power source (e.g. in the above mentioned boat trailer example, the control unit may be located near the boat battery and may be powered by the boat battery). The control unit may receive control signals from the remote 1 0 control (e.g. when the user presses a button on the handheld remote to manoeuvre the trailer in a particular way), and it may then control the way that power/current is delivered to apparatuses on one or both sides of the trailer to thereby steer the trailer in accordance with the control signals generated by the user's operation of the remote. The control available will be limited if only one apparatus is fitted. [0082] A second embodiment of the invention is shown in Figures 11 to 16. Like the first embodiment, the trailer moving apparatus comprises a fixed assembly that is fixedly attached to the trailer and a removable assembly including a motor and drive assembly. The second embodiment is simplified over the first embodiment and allows the removable assembly to be quickly and easily attached to or detached from the fixed assembly. [0083] Features common to both embodiments will not necessarily be discussed again such as mounting locations relative to the wheels, mirrored embodiments, remote control etc. [0084] The second embodiment of the invention is shown in Figure 11 and comprises a fixed assembly 200 and removable assembly 300. As the two assemblies are shown engaged it is not apparent which features belong to which assembly; this will become clear in subsequent Figures. The removable assembly 300 is shown with protective covers 301, 302 and 303 fitted. To better appreciate the internal mechanisms these covers are not shown in subsequent Figures. [0085] The fixed assembly 200 is shown in isolation in Figure 12 and comprises a vertical member 210 for attachment to a trailer, a horizontal member 220 moveably attached to the vertical member and a bracket 230 at the end of the horizontal member to which the moveable assembly 300 is attached. [0086] The vertical member 210 facilitates attachment of the fixed assembly 200 to a trailer chassis member and comprises angle 211 (of which only one face can be seen), fixed plate 212 attached to the top of the angle and moveable plate 213. A trailer chassis member (not shown) sits between the fixed plate 212 and the moveable plate 213. Bolts 214 pass through both plates and when engaged with nuts 215 secure the vertical member 210 to the trailer chassis member. Packers (not shown) may be placed between fixed plate 212 and the trailer chassis member to provide vertical adjustment of the fixed assembly in relation to the trailer. [0087] The horizontal member 220 is in the form of a square tube and is attached perpendicular to the bottom end of the vertical member 210 by means of a U-bolt 221 passing through angle 211. Angle 211 has a series of holes (not shown) to provide positioning options for the horizontal member. The horizontal member may also be fixed at any desired position along its length thus providing horizontal adjustment of the fixed assembly 200 across the width of the trailer. A packer 222 may also be placed between the horizontal member 220 and the vertical member 210 to provide horizontal adjustment of the fixed assembly along the length of the trailer. [0088] The bracket 230 is at the end of the horizontal member 220 and comprises side walls 231; a hook 232 for engaging the removable assembly 300 and locking hole 233 that accepts a locking pin 400 which also passes through the removable assembly 300 thus securing the moveable assembly in place. The bracket further includes notches 234 and lugs 235 to help locate and secure the removable assembly 300. [0089] One will appreciate that the three orthogonal adjustments of the fixed assembly 200 will allow the removable assembly 300 to be readily placed in a desired location in relation to the wheel of a trailer. The chosen embodiment readily accommodates trailers of varying dimensions and may be quickly and easily fitted to or removed from a trailer with just the use of a spanner. [0090] The removeable assembly 300 is shown in Figures 13 and 14 in retracted and extended positions respectively. The retracted position is used when fitting the removable assembly 300 to the fixed assembly 200. The extended position is used when the removable assembly 300 engages the wheel of a trailer. Figures 15 and 16 show the removable assembly with various components removed or shown transparent so that the inner working may be seen. [0091] Similar to the removable assembly 100 of the first embodiment previously discussed; the removable assembly 300 includes an electric motor 311, gearbox 312, traction roller 313 and roller retaining arm 314. The removable assembly 300 also includes a 320 which holds the gearbox 312 and retainedly slides back and forth within a frame 340 to achieve the retracted and extended positions of the removable assembly. [0092] The carriage 320 includes a body (not visible) to which the gearbox 312 is mounted; side walls 322; locating shafts 323 and 324 with nuts 325 and washers 326 which retain the carriage within the frame 330; and cam follower 326 with its proximal end rotatably attached to locating shaft 323. [0093] The frame 340 comprises walls 341 held fixedly apart by pin 342; cam shaft 343 with cam 344 and hexagonal head 345. On the underside of the frame there is a receptacle (not shown) for engaging the hook 232 of the fixed assembly 200.
    [0094] The frame walls 341 include slots 350 through which the locating shafts 323 of the carriage 320 pass. The slots 350 thus guide the carriage 320 as it moves between the retracted and extended positions. [0095] The cam shaft 343 is rotatably mounted to the frame walls 341 and may be rotated via hexagonal head 345 by using a spanner, tyre lever or the like. When the cam shaft is rotated the cam 345 acts on the distal end of the cam follower 326 resulting in movement of the carriage 320 between the retracted and extended positions. The profile of the cam follower 326 biases the carriage 320 to the extremes of the retracted and extended positions. [0096] The frame wall 341 includes notches 351 which engage with corresponding lugs 235 on the bracket 230. The wall extremities 352 also engage with notches 234 of the bracket 230. Together these features help align and secure the removable assembly to the fixed assembly. [0097] Once the carriage 320 is in the fully extended position it may be locked in place by means of the locking pin 400 passing in turn through the frame 340, carriage 320 and the fixed assembly 200. [0098] Many mechanical equivalents could be made for various components of the second embodiment described without deviating from the scope of the invention. For example the hook on the fixed assembly and the corresponding receptacle on the removable assembly could be transposed. [0099] The reader will now appreciate the present invention which provides for a removable driving assembly for use on trailers that can be quickly and easily removed and attached to a trailer to drive it. [00100] In the present specification and claims (if any), the word "comprising" and its derivatives including "comprises" and "comprise" include each of the stated integers but does not exclude the inclusion of one or more further integers. [00101] In compliance with the statute, the invention has been described in language more or less specific to structural or methodical features. It is to be understood that the invention is not limited to specific features shown or described since the means herein described comprises preferred forms of putting the invention into effect. The invention is, therefore, claimed in any of its forms or modifications within the proper scope of the appended claims (if any) appropriately interpreted by those skilled in the art.
    权利要求:
    Claims (5)
    [1] 1. An apparatus for moving a trailer comprising a traction roller which can be secured relative to the trailer and which can engage with a wheel of the trailer, and an electric motor for driving the traction roller, wherein at least the electric motor is disconnectable relative to the trailer.
    [2] 2. An apparatus for moving a trailer comprising a first assembly secured to the trailer and a second assembly removably attachable to the first assembly, wherein the second assembly comprises a traction roller which engages a wheel of the trailer and an electric motor to drive the traction roller.
    [3] 3. An apparatus as in claim 2 wherein the first assembly is attached to the second assembly by means of a hook and mating receptacle for the hook.
    [4] 4. An apparatus as in claim 2 or 3 wherein the traction roller is moveable between a first position in which it engages the trailer wheel and a second position in which it does not engage the trailer wheel.
    [5] 5. An apparatus as in claim 4 wherein the traction roller is moved between the first and second position by means of rotating camshaft.
    类似技术:
    公开号 | 公开日 | 专利标题
    US7451841B2|2008-11-18|Mobile trailer hitching apparatus
    US8091913B1|2012-01-10|Variable adjustable trailer hitch
    US7621356B2|2009-11-24|Pallet puller tool
    US5072962A|1991-12-17|Front/rear mounted portable load-bearing winch
    US9150068B2|2015-10-06|Trailer coupling
    US5482424A|1996-01-09|Car rack for wheelchairs and the like
    US7290755B1|2007-11-06|Trailer hitch method and apparatus
    US6386514B1|2002-05-14|Portable hitch-mounted winch
    US8042825B2|2011-10-25|Trailer towing system
    US20080100076A1|2008-05-01|Cargo carrying system
    EP2810856B1|2020-01-01|Drive unit for a trailer and method of installation
    US20060042841A1|2006-03-02|Powered tug
    US5927742A|1999-07-27|Trailer hitch aligner
    AU2012210757A1|2012-08-02|Trailer coupling
    AU2013251128A1|2014-11-06|Self-locking compact coupling
    US4511159A|1985-04-16|Trailer hitch guide assembly
    AU2013200173B2|2014-04-10|Apparatus for moving a trailer
    US7318698B1|2008-01-15|Lift/transporter for small vehicle
    EP1894822A1|2008-03-05|Apparatus for moving a trailer
    WO2013085545A2|2013-06-13|Variably adjustable trailer hitch
    US3236541A|1966-02-22|Trailer hitch
    GB2419575A|2006-05-03|A manually removable motorized jockey wheel assembly
    US20170136836A1|2017-05-18|Ever-level adjustable ball hitch
    US10160424B2|2018-12-25|Translationally maneuverable trailer jack track system
    GB2525406A|2015-10-28|Adjustable control system for a caravan mover system
    同族专利:
    公开号 | 公开日
    AU2013200173B2|2014-04-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1764274A1|2005-09-16|2007-03-21|Purple Line Limited|Apparatus for moving trailers|AU2014218438B1|2014-08-29|2015-09-10|Opus Rv Pty Ltd|Trailer Moving System|
    法律状态:
    2014-08-07| FGA| Letters patent sealed or granted (standard patent)|
    2015-07-02| PC| Assignment registered|Owner name: OPUS RV PTY LTD Free format text: FORMER OWNER WAS: PURPLE LINE PTY LTD |
    优先权:
    申请号 | 申请日 | 专利标题
    AU2012900118||2012-01-12||
    AU2012900118A|AU2012900118A0||2012-01-12|Apparatus for moving a trailer|
    AU2013200173A|AU2013200173B2|2012-01-12|2013-01-14|Apparatus for moving a trailer|AU2013200173A| AU2013200173B2|2012-01-12|2013-01-14|Apparatus for moving a trailer|
    [返回顶部]