Cargo carrying device for a vehicle and vehicle including same

专利摘要:
A cargo carrying device for a vehicle and a vehicle including a cargo carrying device is disclosed. In one aspect, the cargo carrying device includes: 5 a first roller and a second roller, wherein, upon installation to a cargo carrying area of the vehicle, the first roller is located substantially at a rear end of the vehicle and the second roller is located forward of the first roller substantially at an opposite end of the cargo carrying area of the vehicle; a conveyor belt for supporting cargo thereon having a first end attached to the first 10 roller and a second opposite end attached to the second roller; and a drive assembly for selectively causing rotation of the first roller or second roller such that the conveyor belt moves toward or away from the rear end of the vehicle to facilitate loading or unloading of cargo, wherein the drive assembly includes: a first motor operatively connected to the first roller for rotation thereof; and 15 a second motor operatively connected to the second roller for rotation thereof. -1/10
公开号:AU2013202616A1
申请号:U2013202616
申请日:2013-04-05
公开日:2014-04-24
发明作者:Bruno Oppedisano；Paolo Usatti
申请人:Bruno Oppedisano；Paolo Usatti；
IPC主号:B60P1-36

专利说明:
- 1 CARGO CARRYING DEVICE FOR A VEHICLE AND VEHICLE INCLUDING SAME Field of Invention 5 The present invention relates to a cargo carrying device for a vehicle, and a vehicle including a cargo carrying device. Background Manually loading and unloading cargo to and from vehicles, eg. truck beds, is a time 10 consuming and physically demanding exercise. When loading a truck bed, not only must the cargo, eg a box, be lifted onto the truck bed, but it must also be physically moved along the truck bed. Similarly, when unloading a truck bed, the cargo must first be physically moved to the rear of the truck bed before it can be lifted off the truck bed. 15 In commercial loading docks, conveyor devices are often used to assist in loading cargo onto and from truck beds. Such conveyor devices are usually fixed or mobile conveyors at the dock which can be arranged to have one end protrude over the truck bed. However, even with such conveyors, the cargo needs to be physically moved along the truck bed to and from the conveyor. Furthermore, such conveyor devices are rarely found outside of commercial loading 20 docks. Summary In a first aspect there is provided a cargo carrying device for a vehicle, wherein the cargo carrying device includes: 25 a first roller and a second roller, wherein, upon installation to a cargo carrying area of the vehicle, the first roller is located substantially at a rear end of the vehicle and the second roller is located forward of the first roller substantially at an opposite end of the cargo carrying area of the vehicle; -2 a conveyor belt for supporting cargo thereon having a first end attached to the first roller and a second opposite end attached to the second roller; and a drive assembly for selectively causing rotation of the first roller or second roller such that the conveyor belt moves toward or away from the rear end of the vehicle to facilitate 5 loading or unloading of cargo, wherein the drive assembly includes: a first motor operatively connected to the first roller for rotation thereof; and a second motor operatively connected to the second roller for rotation thereof. In certain embodiments, the first motor and second motor are hydraulic motors. 10 In certain embodiments, the drive assembly includes an electric motor operably connected to a pump which is in fluid communication with a fluid source, wherein selective operation of the electric motor causes the pump to transfer a pressurised fluid from the fluid source to the first hydraulic motor or the second hydraulic motor in order to rotate the first roller or second roller 15 respectively. In certain embodiments, the electric motor is a bidirectional electric motor operable in a first operating mode and a second operating mode. 20 In certain embodiments, when the electric motor is operated in the first operating mode, the electric motor causes a pressure differential across hydraulic ports of the first hydraulic motor thereby actuating the first hydraulic motor such that the conveyor belt is pulled by the first roller in a first direction whilst the second hydraulic motor free spins. 25 In certain embodiments, when the electric motor is operated in the second operating mode, the electric motor causes a pressure differential across hydraulic ports of the second hydraulic motor thereby actuating the second hydraulic motor such that the conveyor belt is pulled by the second roller in a second direction whilst the first hydraulic motor free spins.
-3 In certain embodiments, the drive assembly includes a pressure relief arrangement to transfer at least some of the pressurised fluid to the fluid source when the pressure relief arrangement is exerted to at least a threshold pressure. 5 In certain embodiments, the pressure relief arrangement includes a first pressure relief valve for transferring at least some of the pressurised fluid to the fluid source when the electric motor causes a pressure differential across the hydraulic ports of the first hydraulic motor which exceeds the threshold pressure. 10 In certain embodiments, the pressure relief arrangement includes a second pressure relief valve for transferring at least some of the pressurised fluid to the fluid source when the electric motor causes a pressure differential across the hydraulic ports of the second hydraulic motor which exceeds the threshold pressure. 15 In certain embodiments, the drive assembly includes a drain line arrangement for draining fluid from the first or second hydraulic motor when undergoing free spin. In certain embodiments, the cargo carrying device includes a planar support surface which the conveyor belt slides thereover. 20 In certain embodiments, the device includes at least one guide roller to restrict separation between the conveyor belt relative to the planar support surface. In certain embodiments, an axis of the first roller is located below a travel plane of the 25 conveyor belt and an axis of the second roller is located above a travel plane of the conveyor belt.
-4 In certain embodiments, the cargo carrying device includes a control device in electrical communication with at least part of the drive assembly to selectively control operation of at least one of the first motor and the second motor. 5 In certain embodiments, the drive assembly includes a first drive chain assembly operably connected between the first roller and the first hydraulic motor, and a second drive chain assembly operably connected between the second roller and the second hydraulic motor. In certain embodiments, the drive assembly includes a first drive chain assembly operably 10 connected between the first roller and the first hydraulic motor, and a second drive chain assembly operably connected between the second roller and the second hydraulic motor, wherein the support surface include one or more apertures to enable a drive chain of the second drive chain assembly to pass through support surface. 15 In certain embodiments, the cargo carrying device includes a frame for mounting the cargo carrying device to the vehicle In certain embodiments, the first roller is located below the frame and the second roller is located above the frame. 20 In certain embodiments, the drive assembly includes a second guide roller associated with the second roller, wherein the second guide roller is adjacent the rear end of the vehicle and guides the conveyor belt over a rear edge of the frame. 25 In another aspect there is provided a vehicle including a cargo carrying device according to the first aspect. Other aspects and embodiments will be appreciated throughout the description of the preferred embodiments.
-5 Brief Description of the Drawings A preferred embodiment of the present invention will now be described with reference to the accompanying drawings, in which: 5 Figure 1 is a side view of an example vehicle incorporating an example cargo carrying device; Figure 2 is a plan view of the vehicle of Figure 1; and 10 Figure 3 is a perspective view an example of the cargo carrying device; Figure 4 is a first rear perspective view of another example of the cargo carrying device; Figure 5 is a second rear perspective view of the cargo carrying device of Figure 4; 15 Figure 6 is a magnified rear perspective view of a portion of the drive assembly of the cargo carrying device of Figure 4; Figure 7 is a magnified front perspective view of a portion of the drive assembly of the cargo 20 carrying device of Figure 4; Figure 8 is a side perspective view of cargo carrying device of Figure 4; Figure 9 is a front perspective view of the cargo carrying device of Figure 4 including a front 25 frame; and Figure 10 is an example hydraulic circuit diagram of the drive assembly for the cargo carrying device of Figure 4.
-6 Description of Preferred Embodiments The present invention lends itself to many different implementations, as will be apparent to those skilled in the art. The following example is intended purely to illustrate one possible 5 implementation. Figure 1 shows a vehicle 10 incorporating a preferred form of the cargo carrying device 12. The vehicle 10 shown is a utility vehicle of the type normally having a rear load tray, being the area of the vehicle where cargo is normally carried. As can be seen in Figure 1, the 10 normally present rear load tray has been replaced by the cargo carrying device 12, which is installed on the vehicle's rear chassis 14. As shown in Figure 2, the cargo carrying device 12 takes up substantially the same width as the cargo carrying area of vehicle 10. Turning to Figure 3, there is shown the cargo carrying device 12 in isolation. 15 The device 12 includes two rollers 16, 18 rotatably mounted within and at opposing ends of a frame 20. A conveyor belt 22 is shown extending between the rollers 16, 18. The conveyor belt 22 includes a first end securely attached to roller 16 and a second opposing end securely attached to roller 18. It will be appreciated that the belt 22 can be attached to the rollers 16, 18 20 by any suitable means. The conveyor belt 22 has a width extending substantially across the entire width of the frame 20. Ideally, the belt has a minimum length of approximately twice the length of the frame 20. The frame 20 is open-topped thereby exposing the surface of the conveyor belt 22 to allow 25 cargo to be placed thereon. In the embodiment shown in Figures 1 to 3, beneath the belt 22 and between the rollers 16, 18 are located a number of support members 24 to support the belt 22 when cargo is loaded onto its surface. However, as will be discussed with reference to Figure 4 to 9, this is not essential.
-7 Turning to Figure 1, when the device 12 is installed on the vehicle 10, roller 16 is located at the rear of the vehicle, where cargo is normally loaded onto and unloaded from the conveyor belt 22. It will be appreciated that by rotating roller 16 clockwise, in relation to the perspective 5 of Figure 1, the conveyor belt will wrap around roller 16 and cargo loaded on the surface of the belt 22 will move in the direction of roller 16 towards the rear of the vehicle 10. Similarly, by rotating roller 18 anticlockwise the belt 22 will be caused to move in the opposite direction and, hence, cargo will move away from the rear of the vehicle 10. Ideally, the rollers 16, 18 are adapted to be selectively connected to a motor or the like, such as an electric or hydraulic 10 motor, in order to drive the respective roller and cause the belt to move in the desired direction. In this manner, a person need not exert any manual force in moving cargo along the device 12. Where an electric motor is used, then, as will be appreciated, electric control means, such as a control panel, could be provided with the device. As will be appreciated, such electric control could come in varying degrees of sophistication, from simple 15 forward/reverse control to variable speed control to the inclusion of safety cutoff features, which prevent the device operating while the vehicle is in motion. Conceivably, the rollers 16, 18 could be driven by manual means, for example by providing a handle at the end of the rollers which can be turned by hand. If it is anticipated that the device 20 is to carry fairly light loads, then such manual means may be operably connected to each roller 16, 18 in order to manually rotate the roller. Alternatively, where considerably heavier loads are anticipated, whereby manual force may be insufficient to directly rotate the roller, the manual means could be operably connected to the roller by way of a gear mechanism to increase the torque provided to the roller. Either way, the manual force that would need to be 25 exerted would be conceivably less exerting than having to lift and move cargo along the device. By having the conveyor belt 22 extend substantially across the entire width of the device 12, it is ensured that all the cargo loaded onto the device 12 is moved when the belt 22 is moved.
-8 It will be appreciated that the conveyor belt 22 should be formed of sufficiently strong and durable material to support practical weights of cargo. Practical tests have found that Kevlar meets the requirements for an ideal material. However, it is anticipated that other materials 5 may be suitable depending upon the intended usage. It is anticipated, that particular vehicle chassis may have structures which would allow the rollers 16, 18 to be installed directly onto the chassis and the chassis structure providing self support for the conveyor belt. In which case, there may be no need for the frame 20 and 10 support members 24. Referring to Figures 4 to 9, there is shown another example of a cargo carrying device 12 for a vehicle 10. In particular, the cargo carrying device 12 includes the first and second roller arrangement 16, 18 similar to that described with reference to Figures 1 to 3, wherein a non 15 continuous conveyor belt 22 extends therebetween. The first roller 16 is preferably located under the frame of the cargo carrying device (see Figures 7 and 9) and the second roller 18 is preferably located above the frame 20 of the cargo carrying device 12 (see Figure 4). The second roller 18 can be housed within an enclosure (not 20 shown) such as a hood. In this configuration, an axis of the first roller 16 is located below a travel plane of the conveyor belt 22 and an axis of the second roller 18 is located above a travel plane of the conveyor belt 22. Whilst this configuration is preferable for particular vehicles such as utility vehicles, pickup trucks and the like, the first and second rollers 16, 18 may be both located above or below the frame 20 of the cargo carrying device 12 for other 25 vehicle configurations. Referring to Figure 10, the cargo carrying device 12 includes a drive assembly 1000 for selectively causing rotation of the first roller 16 or the second roller 18 such that the conveyor belt 22 moves toward or away from the rear end of the vehicle 10 to facilitate loading or -9 unloading of cargo. The drive assembly 1000 includes a first motor 1041 operatively connected to the first roller 16 for rotation thereof, and a second motor 1046 operatively connected to the second roller 18 for rotation thereof. 5 The first motor 1041 and second motor 1046 are preferably provided as hydraulic motors. The drive assembly 1000 includes an electric motor 1010 operably connected to a pump 1030 which is in fluid communication with a fluid source 1020. The electric motor 1010 can be preferably provided in the form of a bidirectional electric 10 motor which has a first operating mode and a second operating mode. In a first operating mode, the bidirectional electric motor 1010 causes a pressure differential across ports 1042, 1043 of the first hydraulic motor 1041, such that the first hydraulic motor 1041 in turn operates to pull the belt 22 in a first direction 2010. Whilst the electric motor 1010 operates in the first operating mode, no pressure differential is caused across the ports 1047, 1048 of the 15 second hydraulic motor 1046, thus the second hydraulic motor 1046 does not actively operate whilst the first hydraulic motor 1041 actively operates to pull the belt 22. However, whilst the first hydraulic motor 1041 actively operates to pull the conveyor belt 22, the second hydraulic motor 1046 free spins under the force applied to the conveyor belt 22 by the first hydraulic motor 1041. 20 In a second operating mode, the electric motor 1010 causes a pressure differential across ports 1047, 1048 of the second hydraulic motor 1046, such that the second hydraulic motor 1046 in turn operates to pull the belt 22 in a second and opposite direction 2020 to the first direction 2010. Whilst the electric motor 1010 operates in the second operating mode, no pressure 25 differential is experienced across the ports 1042, 1043 of the first hydraulic motor 1041, thus the first hydraulic motor 1041 does not actively operate whilst the second hydraulic motor 1046 actively operates. However, whilst the second hydraulic motor 1046 actively operates to pull the conveyor belt 22, the first hydraulic motor 1041 free spins under the force applied to the conveyor belt 22 by the second hydraulic motor 1046.
-10 Still referring to Figure 10, when the electric motor 1010 operates in the first operating mode, pressurised fluid is transferred along line 1061 and split at branch 1062. Part of the fluid applies a pressure to port 1047. The other part of the fluid passes through a check valve 1044 5 such that the same pressure is applied at both ports 1047, 1048 of the second hydraulic motor 1046, thereby ensuring that the second hydraulic motor 1046 does not actively operate whilst the electric motor 1010 operates in the first operating mode. The pressurised fluid that flows through check valve 1044 also applies a pressure to port 1043 of the first hydraulic motor 1041 such that a pressure differential is applied across the ports 1042, 1043 of the first 10 hydraulic motor 1041. A check valve 1049 that is connected across the ports 1042, 1043 of the first hydraulic motor 1041 restricts the same pressure being applied at port 1042 of the first hydraulic motor 1041, thereby creating a pressure differential at the ports 1042, 1043 of the first hydraulic motor 1041. Due to the pressure differential, the first hydraulic motor 1041 actively operates to rotate the first roller 16 and pull the conveyor belt 22. Whilst the conveyor 15 belt 22 is pulled by the first hydraulic motor and collected on the first roller 16, the second hydraulic motor 1046 free spins. When the electric motor 1010 operates in the second operating mode, the pressurised fluid is transferred along line 1065 and splits at branch 1066. Part of the fluid applies a pressure to 20 port 1042. The other part of the fluid passes through the check valve 1049 such that the same pressure is applied at both ports 1042, 1043 of the first hydraulic motor 1041, thereby ensuring that the first hydraulic motor 1041 does not actively operate whilst the electric motor 1041 operates in the second operating mode. The pressurised fluid that flows through check valve 1049 applies a pressure to port 1048 of the second hydraulic motor 1046 thereby creating a 25 pressure differential across the ports 1047, 1048 of the second hydraulic motor 1046. The check valve 1044 that is connected across the ports 1047, 1048 of the second hydraulic motor 1046 restricts the same pressure being applied to port 1047 of the second hydraulic motor 1046, thereby creating a pressure differential at the ports 1047, 1048 of the second hydraulic motor. Due to the pressure differential across ports 1047, 1048 the second hydraulic motor - 11 1046 actively operates to rotate the second roller 18 and pull the conveyor belt 22. Whilst the conveyor belt 22 is pulled by the second hydraulic motor 1046, the first hydraulic motor 1041 free spins. 5 The drive assembly 1000 also includes a pressure relief arrangement to transfer fluid back to the reservoir 1020 in instances of excessive pressure in the fluid transfer lines. In particular, the pressure relief arrangement includes a first pressure relief valve 1051 which is in communication with line 1061 and the reservoir 1020, wherein in the event of an unexpected pressure increase which exceeds a pressure threshold in line 1061, the first pressure relief 10 valve 1051 transfers some of the pressurised fluid in line 1061 back to the reservoir 1020 to reduce the pressure in line 1061. Additionally, the pressure relief arrangement includes a second pressure relief valve 1056 which is in communication with line 1065 and the reservoir 1020, wherein in the event of an unexpected pressure increase which exceeds a pressure threshold in line 1065, the second pressure relief valve 1056 transfers some of the pressurised 15 fluid in line 1065 back to the reservoir 1020 to reduce the pressure in line 1065. The drive assembly 1000 also includes a drain line arrangement 1090 which is shown in phantom in Figure 10. In particular the drain line arrangement includes a first drain line is in communication between the first hydraulic motor 1041 and the reservoir 1020, and a second 20 drain line is in communication between the second hydraulic motor 1046 and the reservoir 1020. When the first or second hydraulic motor free spins, the first or second drain line respectively can drain fluid from the shaft seal cavity of the fee spinning motor back to the reservoir 1020. 25 Referring back to Figures 4 to 9, the cargo carrying device 12 includes a planar support surface provided in the form of a support surface 910 which the conveyor belt 22 slides thereover (see Figure 8 and 9). As shown in Figures 4 to 9, in instance where the cargo carrying device is a retrofittable tray for a utility vehicle, the support surface 910 is a tray bed of the tray. The frame 20 of the cargo carrying device 12 defines a frame perimeter 911 which -12 the support surface 910 extends therebetween. As the support surface 910 supports the underside of the conveyor belt 22 whilst supporting the cargo, the support surface 910 restricts sagging of the conveyor belt 22 which can be experienced on other mechanisms which utilise spaced idlers or provide gaps between support members. 5 As shown in Figure 8, the cargo carrying device 12 can include a first guide roller 920 used to restrict substantial separation of the conveyor belt 22 from the support surface 910. The first guide roller 920 is located adjacent the second roller 18. The first guide roller 920 has a contact surface which contacts the conveyor belt 22. When the conveyor belt is pulled by 10 either the first or second hydraulic motor 1041, 1046, the contact surface of the first guide roller 920 contacts the conveyor belt 22 and assists with minimising the separation between the conveyor belt 22 and the support surface 910. A second guide roller 930 (as shown in dotted line in Figure 7) can also be located at the cargo 15 loading end of the cargo carrying device 12 and adjacent the first roller 16. The mounting 932 of the second guide roller is shown in Figure 9. The second guide roller 930 has a contact surface which assists with guiding the conveyor belt 22 over the end edge of the planar support surface 910 such that the conveyor belt 22 does not come into contact with the edge of which could damage the belt 22. 20 As will be appreciated, the first and second guide rollers 920, 930 rotate due to the conveyor belt 22 contacting the contact surfaces of the respective guide rollers 920, 930 when travelling in the first or second direction 2010, 2020. Thus, the first and second guide rollers 920, 930 are not mechanically driven, but merely rotate in response to being in contact with the 25 conveyor belt 22. As shown in Figures 4 to 9, ends of the first roller 16 are rotatably mounted to first mounting assembly 410 comprising of a pair of first mounting plates 411, 412. Additionally, ends of the - 13 second roller 18 are rotatably mounted to second mounting assembly 420 comprising of a pair of second mounting plates 421, 422. Referring specifically to Figures 7 and 9, the pair of first mounting plates 410 are attached to 5 the first end of the tray and extends downwardly therefrom. The pair of first mounting plates 410 have rotatably mounted thereto the ends 161, 162 of an axle of the first roller 16. In addition, the pair of first mounting plates 410 have rotatably mounted thereto the ends of the axle of the second guide roller 930. Furthermore, one of the first mounting plates 411 supports thereon a first drive chain assembly 500. Specifically, the drive chain assembly 500 includes a 10 first gear cog 510 which is mounted to the ends of the first roller 16, and a second gear cog 520 which is operably connected to the first hydraulic motor 1041, wherein a drive chain 530 extends between the first and second gear cogs 510, 520. When the first hydraulic motor 1041 is driven via the electric motor 1010 operating in the first operating mode, the second gear cog 520 turns due to the chain interconnecting therebetween which is thereby causes the first gear 15 cog 510 to turn. As the first gear cog 510 turns, the first roller 16 rotates to thereby pull the conveyor belt 22 such that it collects upon the first roller 16. Referring specifically to Figure 8, the pair of second mounting plates 421, 422 are attached to the second end of the tray and extends upwardly therefrom. The pair of second mounting 20 plates 421, 422 have rotatably mounted thereto the ends of an axle of the second roller 18. In addition, the pair of second mounting plates 421, 422 have rotatably mounted thereto the ends 921, 922 of the axle of the second guide roller 920. A third mounting plate 430 extends downwardly from the tray and below one of the second mounting plates 421. The third mounting plate 430 and one of the second mounting plates 421 supports a second drive chain 25 assembly 600. Specifically, the drive chain assembly 600 includes a first gear cog 610 which is mounted to one of the ends 181 of the second roller 18, a second gear cog 620 supported by the third mounting plate 430 which is operably connected to the second hydraulic motor 1046, wherein a drive chain 630 extends between the first and second cogs 610, 620. When the second hydraulic motor 1046 is driven via the electric motor 1010 operating in the second -14 operating mode, the second gear cog 620 turns due to the chain interconnecting therebetween which is thereby causes the first gear cog 610 to turn. As the first cog 610 turns, the second roller 18 rotates to thereby pull the conveyor belt 22 such that it collects upon the second roller 18. It will be appreciated that the second mounting assembly 420 has been described including 5 a third mounting plate 430, the second gear cog 620 can alternatively be supported on the respective second mounting plate 421. As shown in Figure 8, the support surface 910 may include one or more apertures 810, 820 substantially adjacent the perimeter, wherein the drive chain 630 of the second drive chain 10 assembly 600 can pass therethrough such that the drive chain 630 does not project past the perimeter 911 of the support surface 910. It will be appreciated that a similar arrangement can be adopted for the first drive chain assembly 500 (see Figure 7). As shown in Figures 5 and 6, the cargo carrying device 12 includes a plurality of support 15 members 650 which are attached and project below the support plate 910. At least some of the support members 650 have mounting feet 660 extending downwardly therefrom in order to allow for the cargo carrying device 12 to be retrofittably attached to a chassis of a vehicle 10. While the previous description referred to a utility vehicle, it is anticipated that the device 20 could be installed on other vehicles having cargo carrying areas, such as vans, trucks etc. The device could be incorporated onto a vehicle during its manufacture or could be retrofitted to an existing vehicle. While the present invention has been described with reference to a specific embodiment, it 25 will be appreciated that various modifications and changes could be made without departing from the scope of the invention.

权利要求:
Claims (20)
[1] 1. A cargo carrying device for a vehicle, wherein the cargo carrying device includes: a first roller and a second roller, wherein, upon installation to a cargo carrying area of 5 the vehicle, the first roller is located substantially at a rear end of the vehicle and the second roller is located forward of the first roller substantially at an opposite end of the cargo carrying area of the vehicle; a conveyor belt for supporting cargo thereon having a first end attached to the first roller and a second opposite end attached to the second roller; and 10 a drive assembly for selectively causing rotation of the first roller or second roller such that the conveyor belt moves toward or away from the rear end of the vehicle to facilitate loading or unloading of cargo, wherein the drive assembly includes: a first motor operatively connected to the first roller for rotation thereof; and a second motor operatively connected to the second roller for rotation thereof. 15
[2] 2. The cargo carrying device according to claim 1, wherein the first motor and second motor are hydraulic motors.
[3] 3. The cargo carrying device according to claim 2, wherein the drive assembly includes 20 an electric motor operably connected to a pump which is in fluid communication with a fluid source, wherein selective operation of the electric motor causes the pump to transfer a pressurised fluid from the fluid source to the first hydraulic motor or the second hydraulic motor in order to rotate the first roller or second roller respectively. 25
[4] 4. The cargo carrying device according to claim 3, wherein the electric motor is a bidirectional electric motor operable in a first operating mode and a second operating mode.
[5] 5. The cargo carrying device according to claim 4, wherein when the electric motor is operated in the first operating mode, the electric motor causes a pressure differential across -16 hydraulic ports of the first hydraulic motor thereby actuating the first hydraulic motor such that the conveyor belt is pulled by the first roller in a first direction whilst the second hydraulic motor free spins. 5
[6] 6. The cargo carrying device according to claim 5, wherein when the electric motor is operated in the second operating mode, the electric motor causes a pressure differential across hydraulic ports of the second hydraulic motor thereby actuating the second hydraulic motor such that the conveyor belt is pulled by the second roller in a second direction whilst the first hydraulic motor free spins. 10
[7] 7. The cargo carrying device according to claim 6, wherein the drive assembly includes a pressure relief arrangement to transfer at least some of the pressurised fluid to the fluid source when the pressure relief arrangement is exerted to at least a threshold pressure. 15
[8] 8. The cargo carrying device according to claim 7, wherein the pressure relief arrangement includes a first pressure relief valve for transferring at least some of the pressurised fluid to the fluid source when the electric motor causes a pressure differential across the hydraulic ports of the first hydraulic motor which exceeds the threshold pressure. 20
[9] 9. The cargo carrying device according to claim 8, wherein the pressure relief arrangement includes a second pressure relief valve for transferring at least some of the pressurised fluid to the fluid source when the electric motor causes a pressure differential across the hydraulic ports of the second hydraulic motor which exceeds the threshold pressure. 25
[10] 10. The cargo carrying device according to any one of claims 6 to 9, wherein the drive assembly includes a drain line arrangement for draining fluid from the first or second hydraulic motor when undergoing free spin. -17
[11] 11. The cargo carrying device according to any one of claims I to 10, wherein the cargo carrying device includes a planar support surface which the conveyor belt slides thereover.
[12] 12. The cargo carrying device according to claim 11, wherein the device includes at least 5 one guide roller to restrict separation between the conveyor belt relative to the planar support surface.
[13] 13. The cargo carrying device according to any one of claims I to 12, wherein an axis of the first roller is located below a travel plane of the conveyor belt and an axis of the second 10 roller is located above a travel plane of the conveyor belt.
[14] 14. The cargo carrying device according to any one of claims I to 13, wherein the cargo carrying device includes a control device in electrical communication with at least part of the drive assembly to selectively control operation of at least one of the first motor and the second 15 motor.
[15] 15. The cargo carrying device according to any one of claims I to 14, wherein the drive assembly includes a first drive chain assembly operably connected between the first roller and the first hydraulic motor, and a second drive chain assembly operably connected between the 20 second roller and the second hydraulic motor.
[16] 16. The cargo carrying device according to claim 11 or 12, wherein the drive assembly includes a first drive chain assembly operably connected between the first roller and the first hydraulic motor, and a second drive chain assembly operably connected between the second 25 roller and the second hydraulic motor, wherein the support surface include one or more apertures to enable a drive chain of one of the first and second drive chain assembly to travel through support surface. -18
[17] 17. The cargo carrying device according to any one of claims I to 16, wherein the cargo carrying device includes a frame for mounting the cargo carrying device to the vehicle
[18] 18. The cargo carrying device according to claim 17, wherein the first roller is located 5 below the frame and the second roller is located above the frame.
[19] 19. The cargo carrying device according to claim 18, wherein the drive assembly includes a second guide roller associated with the second roller, wherein the second guide roller is adjacent the rear end of the vehicle and guides the conveyor belt over a rear edge of the frame. 10
[20] 20. A vehicle including a cargo carrying device according to any one of claims I to 19.

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同族专利:

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公开号 | 公开日

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AU2013202616B2|2015-12-10|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2016-04-07| FGA| Letters patent sealed or granted (standard patent)|

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2017-11-02| MK14| Patent ceased section 143(a) (annual fees not paid) or expired|

优先权:

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申请号 | 申请日 | 专利标题

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AU2012904364||2012-10-05||

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AU2012904364A|AU2012904364A0||2012-10-05|Conveyor belt cargo carrying and transferring device for vehicles|

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AU2013202616A|AU2013202616B2|2012-10-05|2013-04-05|Cargo carrying device for a vehicle and vehicle including same|AU2013202616A| AU2013202616B2|2012-10-05|2013-04-05|Cargo carrying device for a vehicle and vehicle including same|