• 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:
    The present invention relates to a guide spindle arrangement comprising a spindle bolt (2), a shaft beam (1) attached to a central part (Zb) of the spindle bolt (2), and a shaft pin (3) having a front arm (4) which is rotatable arranged around a front part (2a) of the spindle bolt (2) via a first roller bearing (8) and a second annulus (6) which is rotatably arranged around a second part (Ze) of the spindle bolt (2) via a second roller bearing (13), the guide spindle arrangement comprises a friction element (Z1) which is rotatably connected to the shaft pin (3) and a force-applying device (10, 22) with which it is possible to press the friction element (21) against a surface (Zai) of the spindle bolt (2) with an adjustable force so that the shaft pin (3) obtains a desired rotational resistance when it is rotated around the spindle bolt (2). (Fig. 1)
    公开号:SE1350108A1
    申请号:SE1350108
    申请日:2013-01-31
    公开日:2014-08-01
    发明作者:Martin Stjernling
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    15 20 25 30 35 the lower thread. By means of the upper nut, an inner ring of an upper conical roller bearing can be locked against a surface of the shaft beam. With the help of the lower nut, the upper conical roller bearing and a lower conical roller bearing can be prestressed. In this case, roller bearings are used for bearing both ends of the spindle bolt relative to the shaft journal.
    SUMMARY OF THE INVENTION The object of the present invention is to provide guide spindle arrangements where it is possible to set a desired constant rotational resistance for a shaft pin which is rotated about a spindle bolt which is substantially independent of the load on the guide spindle arrangement.
    This object is achieved with guide spindle arrangement of the kind mentioned in the introduction, which is characterized by the features stated in the characterizing part of claim 1. When a vehicle turns, the steering wheel and axle pin rotate relative to the spindle bolt and axle beam. According to the invention, a friction element is used which is rotatably connected to the shaft journal and which abuts against a surface of the spindle bolt. Thereby a frictional force arises between the friction element and the spindle bolt when the shaft journal is rotated in relation to the spindle bolt. This frictional force results in the shaft journal receiving a torsional resistance as it is rotated and the spindle bolt.
    The magnitude of the frictional force and the torsional resistance is determined by the force with which the friction elements are pressed against the spindle bolt by a force-applying device. The force-applying device is capable of pressing the friction elements against the spindle bolt with an adjustable force. By means of such a force-applying device, a suitable force can be applied to the friction element so that a desired torsional resistance is obtained.
    The guide spindle arrangement comprises no sliding bearings but only roller bearings for bearing the shaft pin in relation to the spindle bolt. Roller bearings have a very low friction which is essentially independent of the load on the roller bearing. As a result, the shaft journal can obtain a set rotational resistance which is defined by the force device when it is rotated in relation to the spindle bolt independently of the load.
    According to an embodiment of the present invention, the power supply device comprises a spring means adapted to be applied in contact with the friction element and a capercaillie tension element with which it is possible to provide a tension of the spring means so that it presses the friction element against the spindle bolt. The spring means is here arranged in a position between the spring tensioning element and the friction element. The spring tension element 'applies a force to the spring member so that it is grained. Thus, the spring member exerts a spring bush which presses the friction element against the control spindle. With the aid of the fi spring tension element, a variable force can be created which presses the friction element against the control spindle depending on the compression of the spring member.
    According to an embodiment of the present invention, the ection element is rotatably connected to the shaft pin. This prevents the friction element from rotating.
    The friction element can be rotatably connected to the shaft pin via at least one radially projecting portion which is arranged in a recess in the shaft pin. The recess has a shape and a position so that it prevents the friction element from rotating relative to the shaft journal. Suitably the friction element comprises at least two such radially projecting portions which are advantageously arranged symmetrically.
    According to an embodiment of the present invention, the friction elements are a friction brake which comprises a flat surface which is adapted to be in contact with said surface of the spindle bolt and a flat surface on an opposite side which is adapted to be in contact with the spring means. In this case, in addition to the spring means, a resilient force on one flat side of the friction washer so that the opposite flat side of the friction washer is pressed against said surface of the spindle bolt. Such a friction washer can have a simple design and a reliable function.
    According to an embodiment of the present invention, the spring means is a disc spring. Disc springs have a small extent in an axial direction and they can also provide a relatively large spring force at a relatively small compression.
    Plate cleaners are thus very suitable for use in this context. However, it is possible to use other types of organ venous organs.
    According to an embodiment of the present invention, the spring tension element comprises a component with a threaded portion which is rotatably arranged on a threaded portion of the shaft pin. Such a threaded component can compress the capercaillie member and generate a capercaillie force with a very good precision by screwing the component to a suitable position relative to the shaft pin. The threaded component is advantageously a bearing cap. A bearing cap is needed in any case to dry one end of the spindle bolt and one roller bearing. It is therefore advisable to have the bearing cover also for this purpose. Alternatively, a separate component may be used for this purpose. Such a component may also be threaded and consist of a suitably designed nut, screw or similar component used to clamp the spring member.
    According to an embodiment of the present invention, the friction element is adapted to be applied in contact with an end surface of the spindle bolt. The spindle bolt has a substantially flat end surface which is very suitable for use as a contact surface in this context.
    The friction element is advantageously applied here so that it obtains contact with a relatively large part of the end surface of the spindle bolt.
    According to an embodiment of the present invention, the first layer is a needle bearing. A needle bearing is a roller bearing that can absorb radial forces. Other types of roller bearings can also be used as first and second bearings such as conical roller bearings and spherical roller bearings.
    Conical roller bearings and spherical roller bearings can absorb both axial and radial forces.
    Both the first layer and the second layer are thus roller bearings. Thus, the load on the guide spindle arrangement does not substantially affect the friction and torsional resistance of the bearings. The bearings are surrounded with the advantage of lintel seals and bearing caps that protect against the ingress of dirt. Thus, the bearings can maintain a very low friction during a long operating time.
    According to an embodiment of the present invention, it comprises an axial bearing arranged in an axial position between a surface of the axle pin and a surface of the axle beam.
    The axial bearing advantageously has a flat first surface which is in contact with a flat contact surface of the shaft pin and a flat second surface which is in contact with a flat contact surface of the shaft beam. Said flat surfaces advantageously have a distribution in a perpendicular plane relative to a longitudinal axis through the spindle bolt. The axial bearing can be an axially small plain bearing. Alternatively, the thrust bearing can be a needle bearing.
    BRIEF DESCRIPTION OF THE DRAWING In the following, a preferred embodiment of the invention is described with reference to the accompanying drawing, in which: Figs. I shows a guide spindle arrangement according to the present invention and Pig. 2 shows a cross-sectional view of the guide spindle arrangement in the plane A-A in Fig. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION Fig. 1 shows a section through an end of an axle beam 1 in a vehicle. The shaft beam 1 is provided with a comically shaped hole 1a for folding in a spindle bolt 2. The spindle bolt 2 has a corresponding conically shaped central part 2b which comprises the hole 1a with which the spindle bolt 2 is fixed in the shaft beam 1. The spindle bolt 2 has an upper part 2a with a cylindrical shape and a lower part 2c with a cylindrical shape. A steerable and non-driving wheel of the vehicle is adapted to be fixed on a shaft pin 3 which is rotatably arranged around the spindle bolt 2. The shaft pin 3 has an upper annulus 4 with a first through hole 5 for receiving the upper part 2a of the spindle bolt and a lower arm 6 with a second through hole 7 for receiving the lower part 2c of the spindle bolt.
    The upper part 2a of the spindle bolt is fixed in a first through hole of the upper arm 4 by means of a needle bearing S. A first elastic seal 9 is arranged at a lower opening of the first through hole 5 in a position below the needle bearing 8. The first elastic the seal 9 prevents dirt from penetrating into the needle bearing 8 via a lower opening of the first through hole 5. A first bearing cap 10 closes an upper opening of the first through hole 5. The bearing cap 10 comprises a threaded portion of passages which are adapted to be screwed into a threaded portion 11 which is circumferentially arranged in the upper opening of the first through hole 5. A sliding bearing in the form of an axially arranged sliding ring 12 of a rigid metal material, such as a steel material, is arranged around the spindle bolt 2 in a position below the first elastic the seal 9.
    The sliding ring 12 is arranged in a boundary area between the central part of the spindle bolt. 2b and the upper part 2a of the spindle bolt. The sliding ring 12 is designed as a washer and comprises a first flat upper sliding surface 12a which is in contact with a flat contact surface of the shaft pin 3 and a second flat lower sliding surface 12b which is in contact with a flat contact surface of the shaft beam 1.
    The lower end 6 of the shaft journal 3 comprises a second through hole 7. A conical roller bearing 13 is arranged in the second through hole 7. The conical roller bearing 13 comprises an inner ring 14 which is fixed around the lower part 20 of the spindle bolt and an outer ring 15 which is fixed against a outer wall surface of the hole 7. A second elastic seal 16 is arranged in a position above the conical roller bearing 13 adjacent to an upper opening of the second through hole 7. A second bearing cover 17 seals a lower opening of the second through hole 7. The bearing cover 17 is screwed on with screws 18. An O-ring 19 10 '15 20 25 30 35 35 guarantees that the second bearing cap 17 provides a tight closure at the lower opening of the second through hole 7. The second bearing cap 17 and the second elastic seal 16 provides a tight enclosure that prevents dirt from penetrating the conical roller bearing 13. The bearing cap 17 includes a lower support surface for the conical roller bearing 13. The conical r the wool layer 13 is mounted by means of shim springs 20 on said support surface so that the layer 13 obtains a suitable prestress.
    The first part 2a of the spindle bolt has a first end surface 2a1. A friction bracket 21 is arranged adjacent to the first end surface 2a1. The friction washer 21 has a flat lower surface 21a which is in contact with the first end surface 2a1 of the spindle bolt and a flat upper surface 2lb.
    Pig. 2 shows a sectional view through a portion of the upper arm 4 of the shaft journal where the friction washer 21 can be seen from above. It can be seen here that the friction washer 21. has projecting radial portions 21c extending into a respective recess 4a in the upper arm 4 adjacent the threaded portion 1 1. The recess 4 may have a substantially vertical extension in the vertical portion of the thread and an opening. Thus, the friction washer 21 and the projecting portions 21c can be lowered into the respective vertical recesses 4a to the position in which the friction washer 21 comes into contact with the first end surface 2a1. The recesses 4a prevent the projecting portions 21c and thus the friction washer 21 from rotating inside the first through hole. The friction washer 21 is thus prevented from rotating relative to the upper arm 4 of the shaft journal 3.
    The number of projecting portions 21c and recesses 4a are three here, but the number can of course be varied. After the friction washer 21 has been applied in place in contact with the first end surface 2a1, a disc spring 22 is arranged on the friction washer 21. In this case, the disc spring 22 has a former so that a lower inner surface 22a comes into contact with the upper surface 2lb of the friction washer.
    Finally, the bearing cap 10 is applied in place and screwed into the threaded portion 11.
    The bearing cap 10 comprises a recess 10a at an outer surface of a tool with which the bearing cap is screwed into the threaded portion 11 of the upper arm 4 of the shaft pin 3. When the bearing cap 10 is screwed into said threads 11, a flat inner surface 1019 of the bearing cap 10 contact with the upper surface 221) of the disc spring 22. Upon continued screwing of the bearing cover 10 into the threaded portion 11, the inner surface 101 of the bearing cap exerts a compressive force on the disc spring 22 so that it is compressed in an axial direction. The disc spring 22, in addition to a corresponding capricious force on the spring washer 2], the spring washer 21 thus presses with a corresponding force against the first side surface 2a1 of the spindle bolt 2. The force with which the friction washer 21 is pressed against the first side surface 2a1 can be adjusted to a desired value with by means of the screw position of the bearing cap 10 in the threaded portion 11. The threads of the bearing cap 10 and the threads in the threaded portion 11 are self-inhibiting so they are kept in a sliding position when the tool is removed because they have a pitch and a friction so that they are not screwed up when the bearing cap 10 is subjected to said force from the plate spring 22.
    With knowledge of the specific vehicle and the steering spindle arrangement as above, it is possible to estimate a suitable value of the rotational resistance that the shaft pin 3 should obtain when it rotates around the spindle bolt 2. The suitable value of the rotational resistance corresponds to a certain compression of the disc spring 22 and a certain position of the bearing cover IO. The bearing cover 10 is thus screwed to the position at which the desired torque resistance is obtained. Since the bearings consist only of roller bearings 8, 13, they have a very low friction which is substantially independent of the load on the guide spindle arrangement. Thus, the shaft pin obtains a substantially constant rotational resistance which is defined by the position of the bearing cover 10 and is substantially independent of the load on the guide spindle arrangement. If the torsional resistance needs to be changed, this can be done by a rotational movement of the bearing cover 10 to a new position. The position of the bearing cover 10 can be defined in how many revolutions or degrees it is rotated from an initial position.
    It is thus very easy to change the torque resistance when it needs to be adjusted.
    The invention is in no way limited to the embodiment described in the drawing but can be varied freely within the scope of the claims. The guide spindle arrangement can of course be mounted so that the upper end and the lower end change places.
    权利要求:
    Claims (11)
    [1]
    Guide spindle arrangement comprising a spindle bolt (2), a shaft beam (1) attached to a central portion (2b) of the spindle bolt (2), and a shaft pin (3) comprising a first through hole (5) having a first roller bearing (8) for receiving a first part (2a) of the spindle bolt (2) and a second through hole (7) with a second roller bearing (13) for receiving a second part (2c) of the spindle bolt (2), characterized by that the guide spindle arrangement comprises a friction element (21) which is rotatably connected to the shaft pin (3) and a force-carrying device (10, 22) with which it is possible to press the friction elements (21) against a surface (2a1) of the spindle bolt (2) with a adjustable force so that the shaft journal (3) obtains a desired torsional resistance when it is rotated around the spindle bolt (2).
    [2]
    Steering spindle arrangement according to claim 1, characterized in that the power supply device comprises a spring means (22) adapted to be applied in contact with the friction element (21) and a spring tension element (10) with which it is possible to provide a tension of the spring means (22) so that it presses the friction element (21) against said surface (2a;) of the spindle bolt (2).
    [3]
    Steering spindle arrangement according to Claim 2, characterized in that the friction element (21) is rotatably connected to the shaft pin (3).
    [4]
    Steering spindle arrangement according to claim 3, characterized in that the friction element (21) is rotatably connected to the shaft pin (3) via at least one radially projecting portion (21c) which is arranged in a recess (4a) in the shaft pin (3).
    [5]
    Guide spindle arrangement according to any one of claims 2 to 4, characterized in that the friction element is a friction washer (21) comprising a flat surface (2la) adapted to be in contact with said surface (2a;) of the spindle bolt (2) and a flat surface (2lb) on an opposite side which is adapted to be in contact with the spring member (22).
    [6]
    Steering spindle arrangement according to one of Claims 2 to 5, characterized in that the spring means is a disc spring (22). 10 15 20
    [7]
    Steering spindle arrangement according to one of Claims 2 to 6, characterized in that the core voltage element consists of a threaded component (10) which is rotatably arranged on a threaded portion (1 1) of the shaft pin (3).
    [8]
    Guide spindle arrangement according to Claim 7, characterized in that the threaded component is a bearing cap (10).
    [9]
    Steering spindle arrangement according to one of the preceding claims, characterized in that the friction element (21) is adapted to be arranged in contact with an end surface (Zai) of the spindle bolt (2).
    [10]
    Guide spindle arrangement according to one of the preceding claims, characterized in that the first bearing is a needle bearing (8).
    [11]
    Guide spindle arrangement according to one of the preceding claims, characterized in that it comprises an axial bearing (12) which is arranged in an axial position between a surface of the shaft journal (3) and a surface of the shaft beam (I).
    类似技术:
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    同族专利:
    公开号 | 公开日
    SE536870C2|2014-10-14|
    DE112014000374T5|2015-10-08|
    WO2014120068A1|2014-08-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3479051A|1968-01-11|1969-11-18|Gen Motors Corp|Spherical bearing king pin steering knuckle assembly|
    SE510895C2|1995-10-11|1999-07-05|Volvo Ab|Spindle|
    SE521755C2|1999-12-22|2003-12-02|Volvo Lastvagnar Ab|Spindle assembly for an unpowered, steerable vehicle wheel for motor vehicles|
    NL1018301C2|2001-06-15|2002-12-17|Skf Ab|Sensor in King pin.|
    DE10161207A1|2001-12-13|2003-06-26|Daimler Chrysler Ag|Steering knuckle bolt bearing for utility vehicle has first screw cap interacting with first thread to produce predetermined friction moment or relative position between bearing elements|
    US6827359B2|2002-06-03|2004-12-07|Arvinmeritor Technology, Llc.|Non-drive front axle steering knuckle|
    US7093843B2|2003-05-14|2006-08-22|Arvinmeritor Technology Llc|King pin arrangement for steering knuckle|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1350108A|SE536870C2|2013-01-31|2013-01-31|A steering spindle arrangement|SE1350108A| SE536870C2|2013-01-31|2013-01-31|A steering spindle arrangement|
    PCT/SE2014/050104| WO2014120068A1|2013-01-31|2014-01-28|Steering spindle arrangement|
    DE112014000374.3T| DE112014000374T5|2013-01-31|2014-01-28|The steering spindle arrangement|
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