CN115489586A - Wheel module and vehicle - Google Patents
Wheel module and vehicle Download PDFInfo
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- CN115489586A CN115489586A CN202110680325.9A CN202110680325A CN115489586A CN 115489586 A CN115489586 A CN 115489586A CN 202110680325 A CN202110680325 A CN 202110680325A CN 115489586 A CN115489586 A CN 115489586A
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- rocker arm
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- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims description 27
- 230000007246 mechanism Effects 0.000 claims description 18
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 230000000712 assembly Effects 0.000 abstract description 3
- 238000000429 assembly Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 description 9
- 238000003754 machining Methods 0.000 description 6
- 238000007514 turning Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241001423437 Scleranthus biflorus Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0418—Electric motor acting on road wheel carriers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/006—Attaching arms to sprung or unsprung part of vehicle, characterised by comprising attachment means controlled by an external actuator, e.g. a fluid or electrical motor
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- Vehicle Body Suspensions (AREA)
Abstract
The present invention relates to a wheel module for a vehicle and to the vehicle itself. The wheel module includes: a rocker arm (6) for swingably mounting to a frame of a vehicle and having a first rocker arm end and a second rocker arm end; a steering member (3) for connecting the wheels and having a first steering member end and a second steering member end; a steering drive member (11) for driving the steering member (3) to rotate; -a transmission (2) comprising two aligning rotary joint assemblies arranged with their respective centre points coinciding, namely a first aligning rotary joint assembly (21) coupling the end of the first rocker arm and the end of the first steering member, a second aligning rotary joint assembly (22) coupling the end of the first steering member and the steering drive member (11); and a multi-directional rotation connection assembly (5) connecting the second steering member end and the second rocker arm end. The vehicle comprises the wheel module.
Description
Technical Field
The invention relates to the technical field of vehicles. The invention relates in particular to a wheel module for a vehicle and to the vehicle itself.
Background
Under the background of continuous breakthrough of intelligent driving technology, a drive-by-wire chassis becomes one of indispensable core technical products of intelligent driving vehicles. In this case, parts such as a steering wheel, a brake pedal and an accelerator pedal can be replaced by the intelligent control system, the intelligent sensing unit on the vehicle transmits the received signals and decision instructions made after calculation to the execution system through a wire harness to realize control of the vehicle, and steer-by-wire and brake-by-wire are key links.
With the development of steer-by-wire technology and in-wheel motor technology, intelligent steer-by-wire systems for steer-by-wire have been proposed. Such a solution is disclosed, for example, in chinese patent application CN 111526999A, wherein a wheel module is provided that integrates wheel drive and wheel steering. In this solution, the wheel module can flexibly control the steering, and can even help the vehicle achieve a steering angle of 90 °. Furthermore, the drive and suspension components are also integrated in one compact unit. The chassis can be conveniently expanded and adjusted by the wheel module, so that the wheel module is suitable for various vehicle types. However, how to ensure high security and reliability of the intelligent control system is a problem to be solved in the field.
Disclosure of Invention
It is therefore an object of the present invention to provide a wheel module for a vehicle, in particular an electric vehicle, which has a higher reliability and a lower cost.
According to one aspect of the invention, the above object is achieved by a wheel module for a vehicle.
The wheel module comprises a rocker arm for swingably mounting to a frame of a vehicle and having a first rocker arm end and a second rocker arm end spaced apart from said first rocker arm end, a steering member for transmitting a steering torque to wheels of the vehicle and having a first steering member end and a second steering member end spaced apart from the first steering member end, and a steering drive member for driving the steering member in rotation.
The wheel module further includes a transmission coupling the rocker arm, the steering member, and the steering drive member. In particular, the transmission comprises two aligning rotary joint assemblies, namely a first aligning rotary joint assembly and a second aligning rotary joint assembly, arranged with their respective center points coinciding, wherein the first aligning rotary joint assembly couples a first rocker arm end of the rocker arm and a first steering member end of the steering member, wherein the second aligning rotary joint assembly couples the first steering member end of the steering member and the steering drive member.
The wheel module also includes a multi-directional rotation link assembly coupling the second rocker arm end of the rocker arm and the second steering member end of the steering member.
Here, the rocker arm is preferably swingably mounted to the vehicle frame via a cushion bush. The rocker arm can be formed from at least two separately produced components by a fixed connection to one another, or can be formed from separate components in one piece. The rocker arm has a first rocker arm end and a second rocker arm end that are different from the swingable mounting point and do not coincide with each other. Preferably, the first rocker end of the rocker arm is an upper side end and the second rocker end of the rocker arm is a lower side end, as viewed in a direction in which the vehicle is placed on the ground in a conventional manner.
The steering member is used in particular for transmitting a steering drive torque to the wheel or more precisely to the wheel assembly. The steering component can be formed from at least two separately produced components by a fixed connection to one another, or can be formed in one piece from the individual components. Here, preferably, the first steering member end of the steering member is an upper side end and the second steering member end of the steering member is a lower side end, as viewed from a direction in which the vehicle is placed on the ground in a conventional manner.
Here, the steering drive member is preferably a power output member of a steering drive device integrated with a steering drive motor, for example, the steering drive member is a motor output shaft of the steering drive motor or an output shaft of a speed change mechanism, particularly a speed reduction mechanism, driven by the steering drive motor.
The first aligning rotary joint assembly has an outer rotary component arranged substantially coaxially and an inner rotary component arranged radially inside it, wherein the outer rotary component and the inner rotary component are preferably rotatable relative to one another by means of rolling bodies in a circumferential direction based on the abovementioned common axis, i.e. the main axis of rotation, and the inner rotary component can be tilted at an angle relative to the main axis of rotation, in particular by means of a radially inner spherical raceway of the outer rotary component. The center point of the first aligning rotary joint assembly is understood to mean the point of intersection of the main axis of rotation of the first aligning rotary joint assembly with the tilt axis of the inner rotary component, or the center of curvature of the spherical track of the outer rotary component. In this case, the outer rotary member can be connected in a rotationally fixed manner, preferably fixedly, to the first rocker arm end, and the inner rotary member can be connected in a rotationally fixed manner, preferably fixedly, to the first steering member end.
In this case, the second aligning rotary joint assembly likewise has an outer rotary component arranged substantially coaxially and an inner rotary component arranged radially inside it, wherein the outer rotary component and the inner rotary component are preferably rotatable relative to one another by means of rolling bodies in a circumferential direction based on the abovementioned common axis, i.e. the main axis of rotation, and the inner rotary component can be tilted at an angle relative to the main axis of rotation, in particular by means of a spherical raceway radially inside the outer rotary component. The center point of the second aligning rotary joint assembly is understood to mean the point of intersection of the main axis of rotation of the second aligning rotary joint assembly with the tilt axis of the inner rotary component, or the center of curvature of the spherical track of the outer rotary component. In this case, the outer rotary member can be connected in a rotationally fixed manner, preferably fixedly, to the first steering member end, and the inner rotary member is connected in a rotationally fixed manner, preferably to the steering drive member.
Particularly preferably, the second aligning rotary joint assembly is arranged radially inside the first aligning rotary joint assembly. In particular, the outer rotary member of the second aligning rotary joint assembly can be fixed radially inside the inner rotary member of the first aligning rotary joint assembly.
The multi-direction rotation connection assembly preferably has an outer component which can slide relative to one another and an inner component which is arranged radially inside the outer component, wherein the outer component can be configured in particular with a preferably spherical sliding surface on which the sliding portion of the inner component slides. Ideally, the center of curvature of the sliding surface of the outer member is the center of rotation of the inner member.
By means of a transmission integrated with two aligning rotary joint assemblies arranged with their respective center points coinciding, it is possible to allow the angle of the deflection axis of the steering member to be brought into an angle with the axis of rotation of the steering drive member. Here, the deflection axis of the steering member can be understood as: a line between the steering member and the two rotatable connections of the rocker arm, i.e. between the rotatable connection coupling the end of the first steering member with the end of the first rocker arm and the rotatable connection coupling the end of the second steering member with the end of the second rocker arm. In particular, in the ideal case, the deflection axis of the steering member and the axis of rotation of the steering drive member coincide with one another. However, in certain circumstances, such as when the wheel is subjected to an external force, the center of rotation of the inner member of the multi-directional rotation connection assembly may be offset from its intended working position, such as from the center of curvature of the sliding surface of the outer member, and thus the yaw axis of the steering member and the rotational axis of the steering drive member no longer coincide with each other. Because the transmission device allows torque transmission with an included angle, the steering driving component is not influenced by external force of wheels, so that a steering driving motor, a gear shaft and other precision parts in the steering driving device can be protected, and the safety and the reliability of a vehicle steering system are improved.
Furthermore, the following disadvantages are also allowed by means of the transmission and the multidirectional rotary connection assembly: the installation hard point dislocation is generated by welding deformation of at least two independent components forming the rocker arm; hard point dislocation caused by machining errors of all parts in the wheel module; and hard spot misalignment due to accumulation of mounting errors of all parts in the wheel module. In the wheel module according to the invention, the machining accuracy requirements of a large number of mechanical parts, in particular components other than the transmission, can be reduced. This enables a considerable reduction in the machining time of the mechanical parts, and a reduction in the manufacturing costs, in particular in the case of mass production.
In a preferred embodiment, the first aligning rotary joint assembly is designed as an aligning rolling bearing having an outer ring and an inner ring which are rotatable relative to one another in an aligning manner, and the second aligning rotary joint assembly is designed as a ball-and-socket joint having a spherical shell and a spherical sleeve which are rotatable relative to one another in an aligning manner, wherein the first rocker arm end is fixedly connected to the outer ring, wherein the first steering member end, the inner ring and the spherical shell are fixedly connected, and wherein the steering drive member is connected to the spherical sleeve in a rotationally fixed manner. The self-aligning rolling bearing can be designed in a known manner. The self-aligning rolling bearing is preferably designed as a self-aligning roller bearing or a drum roller bearing, or the self-aligning rolling bearing can also be designed as a self-aligning ball bearing. Optionally, the self-aligning rolling bearing is designed as a double-row bearing or as a single-row bearing. The birfield joint can be constructed in a known manner. In addition to the spherical shell and the inner race, the rzeppa universal joint comprises a plurality of steel balls and a cage, the steel balls being able to roll on the raceways radially inside the spherical shell and radially outside the inner race. Here, the steering drive member and the inner race are preferably splined to each other.
In this case, the transmission device advantageously also comprises a flange plate which comprises a sleeve section which can be pressed radially between the spherical shell of the rzeppa joint and the inner ring of the aligning rolling bearing, and a flange section which can be fixedly connected to the end of the first steering component, for example by means of fastening means. The first steering member end portion, the inner race, and the spherical shell can be fixed to each other with high efficiency and firmly by means of the flange.
In this case, it is advantageous if one of the first steering member end and the first rocker arm end is provided with a rotation-limiting projection and the other with two rotation-limiting stops matching the rotation-limiting projection, in order to define the angle of rotation of the steering member relative to the rocker arm.
In this case, it is particularly advantageous if the first rocker arm end is designed to receive and fixedly connect an annular portion of the outer ring of the first aligning rotary joint assembly, in particular the aligning rolling bearing, which rotation limiting projection projects beyond an axial end face of the annular portion facing the first diverting member end, and the first diverting member end is designed as a disk-shaped portion which is directly or indirectly fixedly connected to the inner ring of the first aligning rotary joint assembly, in particular the aligning rolling bearing, and two rotation limiting stops are designed on the outer circumference of the disk-shaped portion. The rotation angle of the steering member relative to the rocker arm can thus be defined within a predetermined range in a simple and compact manner.
In this case, it is particularly advantageous to arrange the relative positions of the two rotation-limiting stops and of the rotation-limiting projection such that the relative angle of rotation of the steering component relative to the rocker arm is in the range from-45 ° to 90 °. Here, the angle range can be understood as: the wheel is capable of deflection relative to the frame within a range of 45 inwardly to 90 outwardly.
In a preferred embodiment, the multidirectional rotation connection assembly is configured as a ball joint. Preferably, the ball joint comprises a ball head and a ball socket, and the ball head can slide and rotate in the ball socket in any direction within a certain angle range.
Here, preferably, the second steering member end is configured with a ball socket, and the second rocker arm end is provided with a ball head. In this case, a ball can be connected to the second rocker arm end or can be formed directly as a ball in a partial position.
In a preferred embodiment, the wheel module is integrated with a steering drive motor, wherein the steering drive member can be driven by the steering drive motor directly or via a gear mechanism. The transmission mechanism is in particular designed as a reduction mechanism, preferably as a reduction gear assembly.
In a preferred embodiment, the wheel is integrated with an in-wheel motor. Here, the in-wheel motor is optionally provided with a service brake mechanism and a parking brake mechanism.
The steering component advantageously comprises a steering arm which forms a first steering component end, a steering knuckle for connecting the steering arm to the vehicle wheel, and a carrier arm which is designed as an arc-shaped beam-shaped component, wherein the carrier arm is fixed with its two ends in the direction of extension at the steering knuckle and with an intermediate region between the two ends is connected with the second rocker arm end by means of a multi-direction rotary connecting assembly. Thus, by means of the knuckle and the carrier arm thus configured, space for arranging the wheel can be freed, and the steering resistance of the wheel can be reduced as much as possible, particularly in the case of a wheel integrated with an in-wheel motor. Furthermore, the steering component, which is relatively complex in construction, is formed here from three components which are fixedly connected to one another, as a result of which each component can have a relatively simple construction and each component can have a relatively large part tolerance range, and the wheel module can therefore be of relatively low cost.
In a preferred embodiment, the rocker comprises an upper arm for swingably mounting to the vehicle body and forming the second rocker end, and a lower arm fixedly connected, preferably welded, at the lower arm and forming the first rocker end.
According to another aspect of the invention, the above object is achieved by a vehicle comprising a wheel module constructed according to the above embodiment.
Drawings
Preferred embodiments of the present invention are schematically illustrated in the following with reference to the accompanying drawings. The attached drawings are as follows:
FIG. 1 is a perspective view of a wheel module according to a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view of the wheel module according to FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2;
fig. 4 is a perspective view of a rotation limiting mechanism of the wheel module according to fig. 1;
FIG. 5 is a top view of the wheel module according to FIG. 1 in a wheel turning condition;
fig. 6 is a bottom view of the wheel module with the rotation limiting mechanism in the state shown in fig. 5;
fig. 7 is a top view of the wheel module according to fig. 1 in another wheel turning situation;
fig. 8 is a bottom view of the wheel module with the rotation limiting mechanism in the state shown in fig. 7;
FIG. 9 is a top view of the wheel module according to FIG. 1 in yet another wheel turning condition; and
fig. 10 is a bottom view of the wheel module in the state of the rotation limiting mechanism shown in fig. 9.
Detailed Description
Fig. 1 shows a perspective view of a wheel module according to a preferred embodiment of the invention. The wheel module provided herein can be used in vehicles, preferably electric vehicles, such as commercial electric vehicles, e.g., large passenger cars.
As shown in fig. 1, the wheel module includes a swing arm 6, a shock absorber 7, a steering member 3, a steering drive device 1, and a wheel assembly 4.
The rocker arm 6 is mainly used to carry the weight of the vehicle body and forces from all directions of the wheel assembly 4.
In the present embodiment, the rocker arm 6 includes an upper arm 61 and a lower arm 62. The lower arm 62 is preferably swingably mounted to the frame via a cushion bushing. The upper arm 61 is fixed at the lower arm 62 by welding. The end of the upper arm 61 remote from the lower arm 62, i.e. the upper end, forms the first rocker arm end. The end of the lower arm 62 remote from the frame mounting point forms a second rocker arm end.
The damper 7 is mounted with its lower end pivotably at the lower arm 62 and the upper end of the damper 7 is intended to be connected to the vehicle frame.
The steering member 3 serves to transmit steering drive torque from the steering drive device 1 to the wheel assembly 4. The steering member 3 includes a steering arm 31, a knuckle 32, and a carrier arm 33. The steering arm 31 is configured as a bar-like member arranged substantially in the vertical direction, an upper end portion thereof forming a first steering member end portion. The knuckle 32 is fixedly connected to the lower end of the knuckle arm 31 by a bolt. The carrier arm 33 is designed as an arc-shaped beam or as a bent blade. The carrier arms 33 are each fixedly connected with the steering knuckle 32 at their two ends in the extension direction and form a second steering component end with their intermediate region in the extension direction between the two ends.
The wheel assembly 4 includes a wheel integrated with a hub motor. The wheel assembly 4 is also integrated with a service brake mechanism and a parking brake mechanism. The wheel assembly 4 is fixed at the knuckle 32 in this embodiment.
The steering drive 1 is integrated with a steering drive motor and a reduction gear pair, wherein the steering drive member 11 is driven by the drive motor via the reduction gear pair. The steering drive member 11 is designed as a toothed shaft.
Fig. 2 shows a cross-sectional view of the wheel module according to fig. 1. Fig. 3 shows a partial enlarged view of fig. 2. As can be seen in connection with fig. 1, 2 and 3, the wheel module further comprises a transmission 2 and a multi-directional rotation connection assembly 5. The transmission 2 here comprises a first aligning rotary joint assembly 21 and a second aligning rotary joint assembly 22.
The steering member 3 is relatively rotatably mounted to the rocker arm 6 by means of a first aligning swivel joint assembly 21 and a multi-directional swivel joint assembly 5. Specifically, a first rocker arm end formed by the upper arm 61 and a first steering member end formed by the steering arm 31 are coupled by a first aligning swivel joint assembly, and a second rocker arm end formed by the lower arm 62 and a second steering member end formed by the carrier arm 33 are coupled by a multi-directional swivel joint assembly 5.
In the present embodiment, as shown in fig. 3, the first aligning rotary joint assembly 21 is configured as an aligning rolling bearing, here a double-row drum roller bearing. The center-adjustable rolling bearing 21 includes an outer ring and an inner ring rotatable in a center-adjustable manner with respect to each other, and further includes a drum roller capable of rolling on a spherical raceway on a radially inner side of the outer ring and rolling on a raceway on a radially outer side of the inner ring, and a cage. Here, the outer ring of the aligning rolling bearing 21 is fixed at the first rocker arm end formed by the upper arm 61. The inner ring of the aligning rolling bearing 21 is fixed at the end of the first steering member formed by the steering arm 31.
In the present embodiment, the multidirectional rotation coupling assembly 5 is configured as a ball joint. The ball joint comprises a ball head and a ball socket, wherein the ball head can slide and rotate in the ball socket in any direction within a certain angle range. Here, a ball pin, which is embodied with a ball head at the end, is fixedly connected to the second rocker arm end formed by the lower arm 62. The second steering member end formed by the bearing arm 33 is configured with a ball socket.
By means of the second aligning swivel joint assembly 22, the steering member 3 can be driven by the steering drive 1 to rotate relative to the rocker arm 6.
In the present embodiment, the second aligning rotary joint assembly 22 is configured as a rzeppa joint, as shown in fig. 3. The birfield joint includes a spherical shell 221 and an inner race 224 that are rotatable relative to each other in a self-aligning manner. In addition to the spherical shell 221 and the inner race 224, the birfield joint includes a plurality of steel balls 222 and cages 223, the steel balls 222 being capable of rolling on a spherical raceway on the radially inner side of the spherical shell 221 and rolling on a raceway on the radially outer side of the inner race 224. Here, the spherical shell 221 is fixed at a first steering member end formed by the steering arm 31.
As shown in fig. 3, the housing 12 of the steering drive 1 is fixed by means of bolts to the rocker arm 6, in particular to the first rocker arm end formed by the upper arm 61. The steering drive member 11 of the steering drive 1 and the inner race 224 of the birfield joint 22 are connected to each other by splines.
The first aligning rotary joint assembly 21, i.e. the aligning rolling bearing, and the second aligning rotary joint assembly 22, i.e. the birfield joint, of the transmission 2 are arranged in such a way that the center points of the aligning rolling bearing and the birfield joint coincide. In this case, the center of curvature of the spherical raceway of the outer ring of the center-adjusted rolling bearing 21 coincides with the center of curvature of the spherical raceway of the spherical shell 221 of the birfield joint 22.
In the present embodiment, as shown in fig. 3, the birfield joint 22 is disposed radially inside the aligning rolling bearing 21. The transmission 2 also comprises a flange 23, wherein the flange 23 is formed with a sleeve section 231 and a flange section 232. The sleeve section 231 is press-fitted radially between the spherical shell 221 of the birfield joint 22 and the inner ring of the aligning rolling bearing 21. The flange section 232 is fixedly connected with the first steering member end formed by the steering arm 31 by means of fasteners such as bolts. By means of the flange plate 23, the steering arm 31, the inner ring of the center-adjusting rolling bearing 21, and the spherical shell 221 of the birfield joint 22 can be fixed to each other with high efficiency and firmly.
In the ideal case, the deflection axis a of the steering member 3 2 (as indicated by the two-dot chain line in FIG. 2) andthe axis of rotation A of the steering drive member 11 1 (as indicated by the single-dot chain line in fig. 2) are coincident with each other. However, in certain situations, for example when the wheel is subjected to an external force, the ball of the ball-and-socket joint 5 may be offset from the centre of the ball-and-socket joint, and therefore the deflection axis a of the steering member 3 2 With the axis of rotation A of the steering drive member 11 1 No longer coincide with each other, when they intersect at the centre point of the transmission 2. Because the transmission device 2 allows torque transmission with an included angle, the steering driving component 11 is not influenced by external force of wheels, so that a steering driving motor, a gear shaft and other precision parts in the steering driving device 1 can be protected, and the safety and the reliability of a vehicle steering system are improved.
Furthermore, the following undesirable conditions are also allowed by means of the transmission 2 and the multidirectional rotary connection assembly 5: the welding deformation of the upper arm 61 and the lower arm 62 generates the dislocation of the mounting hard points; hard point dislocation caused by machining errors of all parts in the wheel module; and hard spot misalignment due to accumulation of mounting errors of all parts in the wheel module. As a result, in the wheel module according to the present embodiment, the machining accuracy requirements of many mechanical parts, particularly members other than the transmission 2, can be reduced. This enables, particularly in the case of mass production, a considerable reduction in the machining time of the mechanical parts and a reduction in the manufacturing costs.
Fig. 4 shows a perspective view of a rotation limiting mechanism of the wheel module according to fig. 1. In the present embodiment, the upper arm 61 is configured at the first rocker arm end with an annular section that accommodates and fixedly connects the outer ring of the aligning rolling bearing 21. The steering arm 31 is formed at the first steering component end with a disk-shaped section which is fixedly connected to the inner ring of the aligning roller bearing 21 by means of the flange 23. A stop bolt 611 forming a rotation stop projection is connected to the annular section of the upper arm 61, and the stop bolt 611 projects from an axial end face of the annular section facing the disc-shaped section of the steering arm 31. Two rotation limit stops 311, 312 are configured at the outer periphery of the disc-shaped section of the steering arm 31. The limit bolt 611 can be stopped at the two rotation limit stoppers 311, 312, whereby the rotation angle of the steering member 3 relative to the rocker arm 6 can be defined within a preset range simply and compactly.
According to the present embodiment, the relative positions of the two rotation limit stoppers 311, 312 and the rotation limit projection 611 are arranged such that the relative rotation angle of the steering member 3 with respect to the rocker arm 6 is in the range of-45 ° to 90 °.
Fig. 5 and 6 show a top view of the wheel module in a wheel turning state and a bottom view of the rotation limiting mechanism thereof in this state, respectively. In this state, the wheel assembly 4 is not deflected, as shown in fig. 5. Here, as shown in fig. 6, the limit bolt 611 is located between the rotation limit stoppers 311, 312 in the rotational direction.
Fig. 7 and 8 show a top view of the wheel module in another wheel turning state and a bottom view of the rotation limiting mechanism thereof in this state, respectively. In this state, the wheel assembly 4 together with the steering member 3 connected thereto is deflected-45 ° relative to the swing arm 6, as shown in fig. 7. At this point, the wheel is deflected 45 inward relative to the frame. Here, as shown in fig. 8, the limit bolt 611 is stopped at the rotation limit stopper 311 in the rotation direction.
Fig. 9 and 10 show a top view of the wheel module in a further wheel turning state and a bottom view of the rotation limiting mechanism thereof in this state, respectively. In this state, as shown in fig. 9, the wheel assembly 4 together with the steering member 3 connected thereto is deflected by 90 ° relative to the swing arm 6. At this point, the wheel is deflected 90 ° outwardly relative to the frame. Here, as shown in fig. 10, the limit bolt 611 is stopped at the rotation limit stopper 312 in the rotation direction.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
List of reference numerals
1. Steering drive device
11. Steering drive member
12. Shell body
2. Transmission device
21. First aligning rotary member, aligning rolling bearing
22. Second aligning rotary member, rzeppa joint
221. Spherical shell
222. Steel ball
223. Ball cage
224. Star shaped sleeve
23. Flange
231. Sleeve segment
232. Flange segment
3. Steering component
31. Steering arm
311. Rotation limiting stopping part
312. Rotation limiting stopping part
32. Steering knuckle
33. Bearing arm
4. Wheel assembly
5. Multidirectional rotary connecting assembly, ball joint
6. Rocker arm
61. Upper arm
611. Rotary limit bulge
62. Lower arm
7. Vibration damper
A 1 Axis of rotation of steering drive member
A 2 A deflection axis of the steering member.
Claims (13)
1. A wheel module for a vehicle, the wheel module comprising:
a rocker arm (6) swingably mounted on a frame of the vehicle, and the rocker arm (6) having a first rocker arm end and a second rocker arm end spaced apart from the first rocker arm end,
a steering member (3) for transmitting a steering torque to the wheels of the vehicle, and the steering member (3) having a first steering member end and a second steering member end spaced apart from the first steering member end,
a steering drive member (11) for driving the steering member (3) in rotation,
a transmission (2) having a first and a second aligning rotary joint assembly (21, 22) arranged with their respective center points coinciding, wherein the first aligning rotary joint assembly (21) couples the first rocker arm end and the first steering member end, the second aligning rotary joint assembly (22) couples the first steering member end and the steering drive member (11),
a multi-directional rotation linkage assembly (5) connecting the second rocker arm end and the second steering member end.
2. The wheel module of claim 1,
the first aligning rotary connection component (21) is designed as an aligning rolling bearing which has an outer ring and an inner ring which can rotate relative to each other in an aligning manner,
the second aligning rotary joint assembly (22) is designed as a ball-and-socket joint having a spherical shell (221) and a star sleeve (224) which can rotate in an aligning manner relative to one another,
wherein the end part of the first rocker arm is fixedly connected with the outer ring,
wherein the first steering member end, the inner race and the spherical shell (221) are fixedly connected,
wherein the steering drive member (11) is connected in a rotationally fixed manner to the inner race (224).
3. The wheel module of claim 2,
the transmission (2) further comprises a flange plate (23), wherein the flange plate (23) comprises a sleeve section (231) which can be radially pressed between the spherical shell (221) and the inner ring, and a flange section (232) which can be fixedly connected with the end of the first steering component.
4. The wheel module of claim 2,
one of the first steering member end and the first rocker arm end is provided with a rotation limit projection (611) and the other is provided with two rotation limit stops (311, 312) matching the rotation limit projection (611) to define a rotation angle of the steering member (3) relative to the rocker arm (6).
5. The wheel module of claim 4,
the first rocker arm end is configured to receive and fixedly connect with an annular section of the outer race, the rotation-limiting projection (611) projects from an axial end face of the annular section facing the first steering member end, and
the first steering component end is designed as a disk-shaped section which is directly or indirectly fixedly connected to the inner ring, wherein the two rotational limit stops (311, 312) are arranged on the outer circumference of the disk-shaped section.
6. The wheel module of claim 4,
arranging the relative positions of the two rotation limit stops (311, 312) and the rotation limit projection (611) such that the angle of rotation of the steering member (3) relative to the rocker arm (6) is in the range-45 ° to 90 °.
7. The wheel module of claim 1,
the multidirectional rotary connection assembly (5) is configured as a ball joint.
8. The wheel module of claim 7,
the end part of the second rocker arm is provided with a ball head,
the second steering member end is configured with a ball socket.
9. The wheel module of claim 1,
the wheel module integrates a steering drive motor, wherein the steering drive member (11) can be driven by the steering drive motor directly or via a gear mechanism.
10. The wheel module of claim 1,
the wheel is integrated with a hub motor.
11. The wheel module of claim 10,
the steering member (3) comprises:
a steering arm (31) forming a first steering member end;
a steering knuckle (32) for connecting the steering arm (31) and the wheel;
a carrying arm (33) which is designed as an arc-shaped beam-shaped component, wherein the carrying arm (33) is fixed with its two ends in the direction of extension at the steering knuckle (32) and is connected with the second rocker arm end with the aid of the multi-direction rotation connection assembly (5) with an intermediate region located between the two ends.
12. The wheel module of claim 1,
the rocker arm (6) comprises an upper arm (61) and a lower arm (62),
wherein the lower arm (62) is for swingably mounting to the vehicle body and forms the second rocker end, the upper arm (61) being fixedly connected at the lower arm (62) and forming the first rocker end.
13. A vehicle comprising a wheel module according to any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110680325.9A CN115489586A (en) | 2021-06-18 | 2021-06-18 | Wheel module and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110680325.9A CN115489586A (en) | 2021-06-18 | 2021-06-18 | Wheel module and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115489586A true CN115489586A (en) | 2022-12-20 |
Family
ID=84464823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110680325.9A Pending CN115489586A (en) | 2021-06-18 | 2021-06-18 | Wheel module and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115489586A (en) |
-
2021
- 2021-06-18 CN CN202110680325.9A patent/CN115489586A/en active Pending
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