CN115519953A - Integrated steering suspension driving system for drive-by-wire chassis and vehicle - Google Patents
Integrated steering suspension driving system for drive-by-wire chassis and vehicle Download PDFInfo
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- CN115519953A CN115519953A CN202211285488.8A CN202211285488A CN115519953A CN 115519953 A CN115519953 A CN 115519953A CN 202211285488 A CN202211285488 A CN 202211285488A CN 115519953 A CN115519953 A CN 115519953A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/001—Suspension arms, e.g. constructional features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/04—Steering gears mechanical of worm type
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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
- B62D5/0421—Electric motor acting on or near steering gear
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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
- B62D5/0442—Conversion of rotational into longitudinal movement
- B62D5/0445—Screw drives
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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
- B62D5/0442—Conversion of rotational into longitudinal movement
- B62D5/0454—Worm gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/02—Steering linkage; Stub axles or their mountings for pivoted bogies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/10—Independent suspensions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/40—Indexing codes relating to the wheels in the suspensions
- B60G2200/422—Driving wheels or live axles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/40—Indexing codes relating to the wheels in the suspensions
- B60G2200/44—Indexing codes relating to the wheels in the suspensions steerable
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Vehicle Body Suspensions (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Abstract
The invention provides an integrated steering suspension frame driving system facing a drive-by-wire chassis and a vehicle, and belongs to the technical field of vehicle chassis. The system comprises: the suspension guide assembly, the steering arm, the steering drive assembly and the wheel assembly; the suspension guide assembly can be provided with a steering abdicating space, and the steering arm is arranged at the steering abdicating space; the power input end of the steering arm is connected with the power output end of the steering driving assembly, and the power output end of the steering arm is connected with the wheel assembly. According to the invention, the steering driving assembly drives the steering arm to rotate so as to drive the wheel assembly to rotate, so that the steering of the wheel assembly is realized, and meanwhile, the steering arm and the wheel assembly rotate and steer at the steering abdicating space, so that the interference between parts such as a suspension guide assembly, the steering arm and the like is avoided, the interference limitation of the rotation of the wheel can be eliminated, the wheels can realize 360-degree interference-free rotation, the flexibility of the vehicle is greatly improved, and the requirement of the vehicle on the driving space is reduced.
Description
Technical Field
The invention relates to the technical field of vehicle chassis, in particular to an integrated steering suspension driving system facing a drive-by-wire chassis and a vehicle.
Background
At present, the electric vehicle mostly adopts centralized driving or wheel-side driving, a chassis structure adopts the transmission, steering and suspension modes of a traditional vehicle, wheels cannot independently steer, the turning radius of the vehicle is large, and a motor occupies large chassis space. After the drive-by-wire chassis is raised, the hub motor is more and more concerned with various advantages. The vehicle provided with the hub motor does not need a differential mechanism, a transmission and a transmission shaft, and can greatly simplify the chassis structure, thereby providing more installation space for other electric devices and improving the space utilization rate; and the speed of each wheel can be independently controlled, and a plurality of complex driving modes can be realized.
Modern urban traffic has many vehicles, many people, narrow roads, limited driving space and serious traffic jam phenomenon, and puts higher requirements on vehicle performance. If the vehicle can realize the all-wheel large-angle steering, the turning radius can be greatly reduced, and the vehicle can realize various complex motion modes such as transverse movement, diagonal movement, narrow space steering, pivot steering and the like. Whereas conventional suspensions are limited in construction, the steering angle is typically between ± 40 °.
Therefore, various suspension structures capable of realizing all-wheel large-angle steering are provided at home and abroad, for example: the Chinese publication number is: CN 111559426A discloses a double-fork-arm suspension structure capable of omni-directionally steering based on a wheel hub motor, which includes a wheel hub motor, a double fork arm for connecting with a vehicle body and a supporting structure for supporting the vehicle body; an upper connecting support and a lower connecting support which are arranged up and down are fixed on the hub motor, a steering engine assembly which can enable the tire to rotate within a range of-90 degrees to 90 degrees is connected between the upper connecting support and the supporting structure, the steering engine assembly comprises a driven gear mechanism fixed with the upper connecting support and an active gear mechanism which is meshed with the driven gear mechanism and fixed with the supporting structure, and the upper connecting support and the lower connecting support are respectively hinged with a fork arm.
According to the double-fork-arm suspension structure based on the hub motor and capable of steering in all directions, the steering angle of the wheel is limited due to the limitation of parts such as the connecting rod when the wheel steers.
Disclosure of Invention
In view of the above, the invention provides an integrated steering suspension driving system and a vehicle for a drive-by-wire chassis, and aims to solve the problem that the steering angle of the conventional suspension structure is limited.
In one aspect, the present invention provides an integrated steering suspension drive system for a drive-by-wire chassis, the system comprising: the suspension guide assembly, the steering arm, the steering drive assembly and the wheel assembly; the suspension guide assembly can be provided with a steering abdicating space, and the steering arm can be arranged at the steering abdicating space in a rotating mode relative to the suspension guide assembly; the power input end of the steering arm is connected with the power output end of the steering driving assembly, and the power output end of the steering arm is connected with the wheel assembly and used for driving the wheel assembly to rotate under the driving action of the steering driving assembly, so that the steering of the wheel assembly is realized.
Further, the integrated steering suspension driving system for a by-wire chassis described above, the steering driving assembly comprises: the steering motor, the speed reducer and the power connecting shaft are connected; the power output end of the steering motor is connected with the power connecting shaft through a speed reducer, the power connecting shaft is used for connecting a steering arm, and the power output end of the steering motor is transmitted to the power connecting shaft after the speed reducer reduces the speed of the power output by the steering motor so as to drive the steering arm to rotate.
Furthermore, in the integrated steering suspension driving system facing the drive-by-wire chassis, the power connecting shaft is provided with a through hole to provide an installation channel for connecting a wheel assembly pipeline and a finished vehicle pipeline; one end of the power connecting shaft is connected with the steering arm, and the other end of the power connecting shaft is provided with a sliding ring, so that a rotating pipeline on the wheel assembly penetrates through the mounting channel, and the rotating pipeline on the wheel assembly is connected with a fixed pipeline on the whole vehicle through the sliding ring.
Further, the above-mentioned integrated steering suspension drive system towards drive-by-wire chassis, the power connection axle includes: a female spline shaft and a male spline shaft; the inner spline shaft and the outer spline shaft are coaxially arranged and connected through a spline, the outer spline shaft is used for connecting the power output end of the speed reducer, and the inner spline shaft is used for connecting the steering arm so as to synchronously rotate along with the outer spline shaft under the action of the outer spline shaft.
Further, in the integrated steering suspension drive system facing the wire-controlled chassis, a shaft sleeve is arranged inside the inner spline shaft and used for supporting the outer spline shaft; and the inner wall of the outer spline shaft is provided with a shaft sleeve limiting mechanism for limiting the bottom end of the shaft sleeve.
Furthermore, in the integrated steering suspension driving system for the wire-controlled chassis, the speed reducer is a worm gear mechanism, the worm is connected with the steering motor, and the worm gear is coaxially arranged with the power connecting shaft and is connected with the power connecting shaft.
Further, the integrated steer suspension drive system for a drive-by-wire chassis described above, said suspension guide assembly comprising: a support arm and a bifurcating arm; the supporting arm is of an arc-shaped structure, and the inner circle center side of the supporting arm is used as a steering abdicating space for mounting a steering arm and a wheel assembly so as to abdicate steering of the wheel assembly; the double-fork arm is arranged on the outer side of the supporting arm and is respectively hinged with the supporting arm and the frame of the vehicle body, so that the supporting arm, the double-fork arm and the frame of the vehicle body form a four-bar linkage; the outer side of the supporting arm and the inner circle center side of the supporting arm are arranged in a back-to-back mode.
Further, in the above-mentioned integrated steering suspension drive system for a steer-by-wire chassis, the steering arm is a bent structure, and includes: a support connection and a steering connection; wherein, turn to connecting portion with supporting connecting portion is the contained angle setting, encloses to establish and forms wheel installation position, supporting connecting portion are used for connecting turn to drive assembly's power take off end, wheel subassembly sets up wheel installation position department and connection turn to on the connecting portion, with following turn to connecting portion and turn to under the effect that turns to drive assembly.
Furthermore, in the integrated steering suspension driving system facing the drive-by-wire chassis, a brake disc is arranged on the hub motor; and/or the steering arm is provided with a brake caliper.
In another aspect, the invention provides a vehicle having the above-described integrated steer suspension drive system for a chassis-by-wire.
According to the integrated steering suspension driving system and the vehicle for the drive-by-wire chassis, the steering arm is arranged at the steering abdicating space in a manner of rotating relative to the suspension guide assembly, the steering arm is driven to rotate through the steering driving assembly so as to drive the wheel assembly to rotate, and the steering of the wheel assembly is realized. In addition, the integrated steering suspension driving system facing the drive-by-wire chassis is simple in structure and easy to realize.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic mechanical diagram of an integrated steer suspension drive system for a drive-by-wire chassis provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an integrated steering suspension drive system facing a chassis-by-wire according to an embodiment of the invention;
FIG. 3 is a front view of an integrated steer suspension drive system for a chassis-by-wire provided in accordance with an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a steering drive assembly provided in accordance with an embodiment of the present invention;
fig. 5 is an exploded view of a steering drive assembly according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The embodiment of the system is as follows:
referring to fig. 1 to 3, a preferred structure of the integrated steering suspension driving system facing a drive-by-wire chassis according to the embodiment of the present invention is shown. As shown, the system includes: the suspension guide assembly 1, the steering arm 2, the steering drive assembly 3 and the wheel assembly 4; wherein the content of the first and second substances,
the suspension guide assembly 1 may be provided with a steering abdicating space 5, and the steering arm 2 may be rotatably disposed at the steering abdicating space 5 with respect to the suspension guide assembly 1. Specifically, suspension direction subassembly 1 is used for setting up on automobile body 6, play the support guide effect, in order to steering arm 2, spare parts such as steering drive subassembly 3 support and lead, make steering arm 2 and wheel subassembly 4 turn to promptly turning to in turning to abdicating 5 departments, avoided interference between spare parts such as suspension direction subassembly 1 and steering arm 2, the pivoted interference restriction of wheel can have been eliminated, make the wheel realize 360 no interference rotations, the vehicle flexibility ratio has been promoted greatly, the demand of vehicle to the space of traveling has been reduced. In this embodiment, the suspension guide assembly 1 may further include a steering limiting assembly for limiting a steering angle of the wheel assembly 4, thereby reducing a wheel installation space requirement, and facilitating reduction of a vehicle transverse dimension and enhancement of vehicle trafficability on the basis of achieving four-wheel steering.
The power input end of the steering arm 2 is connected with the power output end of the steering driving component 3, and the power output end of the steering arm 2 is connected with the wheel component 4, so that the wheel component 4 is driven to rotate under the driving action of the steering driving component 3, and the steering of the wheel component 4 is realized. Specifically, the steering driving assembly 3 may be mounted on the suspension guiding assembly 1 to provide power for rotating the steering arm 2, and may drive the wheel assembly to rotate along with the steering arm 2, so as to achieve 360 ° steering, and certainly, may steer within a proper range. Wherein, the steering arm 2 can realize the steering support of the wheel assembly 4, and ensure the steering stability thereof. In the present embodiment of the present invention,
in the present embodiment, the steering driving assembly 3 is provided with a slip ring 7 for connecting a rotating pipeline on the wheel assembly 4 with a fixed pipeline on the whole vehicle. Wherein, the pipeline can be a wire harness 8 connected to the hub motor and a hydraulic oil pipe 9 of the brake caliper. Specifically, the slip ring 7 converts the rotary connection of the wire harness 8 and the hydraulic oil pipe 9 into fixed connection, is convenient to communicate with the whole vehicle line, further eliminates the limitation of the pipeline on the rotation of the wheel, enables the wheel to realize 360-degree non-pipeline limited rotation, and avoids the winding or twisting of the pipeline. Wherein, turn to drive assembly 3 and can be used to drive wheel subassembly 4 and turn to, provide the passageway that wheel hub motor pencil and brake pipe way and whole car pipeline are connected simultaneously. The slip ring 7 is fixed above the steering drive assembly 3 and used for providing a rotating circuit and a rotating oil circuit/gas circuit channel, and the rotating connection of a wheel hub motor pipe and a wheel hub motor wire is converted into fixed connection, so that the wheel hub motor pipe and the wheel hub motor wire are conveniently communicated with the whole vehicle circuit.
With continued reference to fig. 1-3, the suspension guide assembly 1 includes: a support arm 11 and a bifurcating arm 12; the double-fork arm 12 is disposed outside the supporting arm 11 (on the right side as shown in fig. 3), and the double-fork arm 12 is hinged to the supporting arm 11 and the frame of the vehicle body, so that the supporting arm 11, the double-fork arm 12 and the frame of the vehicle body form a four-bar linkage.
In specific implementation, the supporting arm 11 may have an arc structure, may have a C-shaped structure in this embodiment, and may have other structures. The inner circle center side (the lower left side as shown in fig. 3) of the support arm 11 can be used as a steering abdicating space 5 for installing the steering arm 2 and the wheel assembly 4 to abdicate steering of the wheel assembly 4; wherein, the outside of support arm 11 sets up with the interior centre of a circle side of support arm 11 back of the body mutually, and double fork arm 12 and steering arm 2 set up the both sides at support arm 11 promptly, avoid interference between the two to accessible double fork arm 12 realize and the automobile body between be connected, still can make full use of support arm 11 the interior centre of a circle side space, make full use of space under the prerequisite of ensureing not interfering, make compact structure. Of course, the supporting arm 11 may also be of other structures, such as a bending structure, and the structure is not limited in this embodiment. The double-fork arm 12 can be a hinged connecting rod, and the supporting arm 11, the double-fork arm 12 and the frame of the vehicle body form a four-bar linkage mechanism through the hinging of the two ends. The support arm 11 may be provided with a lightening hole, so that the connection of the parts such as the double-yoke 12 can be facilitated while lightening is realized, and the structure is simple and compact.
In this embodiment, the bifurcating arm 12 may further be provided with a shock absorber 13, one end (lower end as shown in fig. 1) of which is hinged with the bifurcating arm 12, and the other end (upper end as shown in fig. 1) of which is hinged with the vehicle body 6. In specific implementation, the shock absorber 13 may be a coil spring shock absorber, or may be another type of shock absorber and spring that perform the same function, and the structure of the shock absorber 13 is not limited in this embodiment.
With continued reference to fig. 1-3, double yoke 12 includes: an upper yoke 121 and a lower yoke 122; wherein, one end (left end as shown in fig. 1) of the upper fork arm 121 is hinged with the middle position of the supporting arm 11, and the other end (right end as shown in fig. 1) is hinged on the vehicle body 6; one end (left end as viewed in fig. 1) of the lower yoke 122 is hinged to an end (right lower end as viewed in fig. 1) of the support arm 11, and the other end (right end as viewed in fig. 1) is hinged to the vehicle body 6.
In a specific implementation, as shown in fig. 2, the upper yoke 121 may have a Y-shaped structure, and the first end (the left end as shown in fig. 2) may have a rod-shaped structure and may be pivotally connected to the middle position of the supporting arm 11; the second end may be provided with two rods spaced apart from each other, i.e. the second end may have a gap between the two rods as an abdicating hole, through which the shock absorber 13 may pass and hinge on the middle position of the lower yoke 122, ensuring the stability of the suspension guide assembly 1. The ends of the two rods of the second end can be hinged on the frame of the vehicle body through a pivot. The lower yoke 122 may be of a V-shaped configuration, with a first end (the left end as viewed in fig. 2) pivotally connected to the lower end of the support arm 11; the second end may be provided with two levers spaced apart with respect to each other, the ends of both levers being pivotally hinged to the frame of the vehicle body, i.e. the frame, the upper fork arm 121, the lower fork arm 122 and the support arm 11 form a four-bar linkage. Wherein, the second ends of the upper fork arm 121 and the lower fork arm 122 are provided with two rods, which can ensure the stability of the two arms hinged on the frame.
With continued reference to fig. 2 and 3, the steering arm 2 may be a bent structure that includes: a support link 21 and a steering link 22; wherein, turn to connecting portion 22 and support connecting portion 21 and be the contained angle setting, enclose and establish formation wheel installation position, support connecting portion 21 is used for connecting the power take off who turns to drive assembly 3, and wheel assembly 4 sets up in wheel installation position department and connects on turning to connecting portion 22 to turn to under the effect that turns to drive assembly 3 along with turning to connecting portion 22.
In specific implementation, the support connection portion 21 is provided with a mounting hole (not shown in the figure), which is connected with the power output end of the steering driving component 3, and the support connection portion 21 rotates around the axis of the mounting hole under the action of the power output end of the steering driving component 3; turn to connecting portion 22 and support connecting portion 21 and can set up perpendicularly, also can be other angle settings to, turn to connecting portion 22 along the axis setting of mounting hole, in this embodiment, the axis of mounting hole and turn to the equal vertical setting of connecting portion 22, steering arm 2 can drive wheel assembly 4 and carry out 360 of horizontal plane around the vertical line and turn to.
With continued reference to fig. 2 and 3, wheel assembly 4 includes: a wheel body 41 and a hub motor 42; wherein, a wheel hub is arranged on the wheel body 41, and the wheel hub motor 42 is arranged on the wheel hub and used for driving the wheel body 41 to rotate; the power output end of the steering arm 2 is connected with the stator of the in-wheel motor 42 and is used for driving the in-wheel motor 42 and the wheel body 41 to steer.
In specific implementation, the hub motor 42 is fixed on a rim and used for driving the wheel body 41 to rotate, so as to realize running. The hub motor 42 may be provided with a brake disc 43, and the steering arm 2 may be provided with a brake caliper 44, wherein the brake disc 43 may be fixed to the hub motor 42 and the brake caliper 44 may be fixed to the steering arm 2. The lower part of the steering arm 2 is fixed on a stator of the in-wheel motor 42 through a round nut 45, and the two transmit driving torque through a flat key, so that the whole wheel assembly 4 is steered along with the steering arm 2.
Referring to fig. 4 to 5, a preferred structure of the steering driving assembly provided by the embodiment of the present invention is shown. As shown, the steering drive assembly 3 includes: a steering motor 31, a speed reducer 32 and a power connecting shaft 33; the power output end of the steering motor 31 is connected with the power connecting shaft 33 through the speed reducer 32, and the power connecting shaft 33 is used for connecting the steering arm 2, and transmits the power output by the steering motor 31 to the power connecting shaft 33 after the speed of the power output by the steering motor 31 is reduced through the speed reducer 32 so as to drive the steering arm 2 to rotate.
During the concrete implementation, power connecting axle 33 sets up on suspension direction subassembly 1 with the mode that can carry out the pivoted for suspension direction subassembly 1, and power connecting axle 33 rotationally wears to locate support arm 11 to be connected with steering arm 2, can drive steering arm 2 and rotate for support arm 11, realize turning to of wheel subassembly 4. In the present embodiment, a steering controller 34 may be connected to the steering motor 31 for controlling the steering motor 31 to control the rotation speed and the rotation direction of the steering motor 31, and the like, so as to control the steering of the wheel assembly 4. Here, the steering motor 31, the reducer 32, and the steering controller 34 may be coupled as a whole, that is, the housing of the steering motor 31, the housing of the reducer 32, and the steering controller 34 may be coupled as a whole. The output end of the steering motor 31 is decelerated by the decelerator 32, the decelerator 32 may be a worm gear mechanism, the worm is connected with the steering motor 31, the worm gear is coaxially arranged and connected with the power connecting shaft 32, that is, the worm is fixedly connected with the output end of the steering motor 31, the worm gear is coaxially arranged and fixedly connected with the power connecting shaft 32, so that after the deceleration by the decelerator 32, the steering arm 2 is driven by the power connecting shaft 33 to steer; the worm gear mechanism is disposed inside the housing of the speed reducer 32. In the embodiment, the speed reducer 32 adopts a gear to drive and steer, the structure is simple, and the steering motor 31 adopts a worm and gear speed reducing mechanism, and the worm and gear mechanism has a self-locking characteristic, so that the steering has the self-locking characteristic, and the influence of ground impact on the running of the vehicle can be reduced.
With continued reference to fig. 4, the power connection shaft 33 is provided with a through hole 331 to provide a mounting passage for connecting the wheel assembly pipeline and the vehicle pipeline; one end (the lower end shown in fig. 4) of the power connecting shaft 33 is connected with the steering arm 2, and the other end (the upper end shown in fig. 4) is provided with a sliding ring 7, so that a rotating pipeline on the wheel assembly 4 passes through the installation channel, and the rotating pipeline on the wheel assembly is connected with a fixed pipeline on the whole vehicle through the sliding ring 7. Specifically, the worm wheel and power connecting shaft 33 is of a hollow structure, namely, a pipe through hole 331 is formed in the worm wheel and power connecting shaft, the wire harness 8 of the hub motor 42 and the hydraulic oil pipe 9 of the brake caliper 43 are connected to the slip ring 7 through a channel, and the slip ring 7 converts the rotary connection of the wire harness 8 and the hydraulic oil 9 into fixed connection, so that the connection with a whole vehicle line is facilitated.
In this embodiment, the suspension guide assembly 1 is provided with a bearing seat 35, the housing of the speed reducer 32 is disposed on the bearing seat 35, and the power connecting shaft 33 is connected with the bearing seat 35 through a bearing 36; and a bearing limiting part is arranged on the outer wall of the power connecting shaft 33 and used for axially limiting the bearing 36. Specifically, the bearing seat 35 may be fixedly mounted on the support arm 11, two bearings 36 are respectively disposed on the upper and lower sides of the bearing seat 35, an outer ring of each bearing 36 may be fixed on the bearing seat 35, and an inner ring of each bearing 36 may be fixed on an outer wall of the power connecting shaft 33, so as to achieve rotation of the power connecting shaft 33 relative to the support arm 11. The bearing 36 may be a tapered roller bearing. In order to axially limit the two bearings 36, it is preferable that an outer wall of the power connection shaft 33 is provided with a shaft circlip and/or a limit protrusion structure at intervals so as to axially limit the bearings 36.
With continued reference to fig. 4 and 5, the power connecting shaft 33 includes: the female and male spline shafts 332, 333; the inner spline shaft 332 and the outer spline shaft 333 are coaxially arranged and connected through a spline 334, the outer spline shaft 333 is used for connecting a power output end of the speed reducer 32, and the inner spline shaft 332 is used for connecting the steering arm 2 so as to synchronously rotate along with the outer spline shaft 332 under the action of the outer spline shaft 333.
In specific implementation, the external spline shaft 333 is coaxially fixed on the worm wheel, and the internal spline shaft 332 is used in cooperation with the external spline shaft 333, that is, the internal spline shaft 332 is partially sleeved outside the external spline shaft 333, and the inner wall of the internal spline shaft 332 is provided with an internal spline, and the outer wall of the external spline shaft 333 is provided with an external spline which is matched with the internal spline to form a spline 334 so as to enable the two to synchronously rotate. In this embodiment, the female spline shaft 332 is rotatably mounted on the supporting arm 11, i.e. mounted on the supporting arm 11 through the bearing seat 35 and the bearing 36, and the bottom end of the female spline shaft 332 can be provided with a threaded hole to be detachably and fixedly mounted on the steering arm 2 through a connecting member such as a screw, so as to drive the steering arm 2 to rotate synchronously therewith. The female spline shaft 332 is rotatably attached to the support arm 11.
With continued reference to fig. 4 and 5, the inside of the female spline shaft 332 may be provided with a bushing 335 for supporting the male spline shaft 333 to achieve axial position limitation of the male spline shaft 333; in this embodiment, a shaft sleeve limiting mechanism 336 is disposed on an inner wall of the external spline shaft 333 and is used for limiting the bottom end of the shaft sleeve 335, and the shaft sleeve limiting mechanism 336 may be a circlip for a hole, which is detachably disposed on an installation hole formed in an inner wall of the external spline shaft 333 and is used for supporting and limiting the bottom end of the shaft sleeve 335. The outer wall of the internal spline shaft 332 is provided with an elastic collar 337 for a shaft and a limiting convex structure 338 at intervals, which serve as bearing limiting members to realize axial limiting of the external bearing, that is, axial positioning of the internal spline shaft 332.
In summary, in the integrated steering suspension driving system for the drive-by-wire chassis provided in this embodiment, the steering arm 2 is disposed at the steering abdicating space 5 in a manner that the steering arm 2 can rotate relative to the suspension guide assembly 1, and the steering arm 2 is driven to rotate by the steering driving assembly 3 to drive the wheel assembly 4 to rotate, so as to achieve steering of the wheel assembly 4, and meanwhile, the steering arm 2 and the wheel assembly 4 rotate, i.e., steer, at the steering abdicating space 5, so as to avoid interference between the suspension guide assembly 1 and the steering arm 2, and other components, and eliminate interference limitation of wheel rotation, so that the wheels can rotate 360 degrees without interference, thereby greatly improving vehicle flexibility, and reducing the requirement of the vehicle on a driving space. In addition, the integrated steering suspension driving system facing the drive-by-wire chassis is simple in structure and easy to realize.
The embodiment of the vehicle is as follows:
the present embodiment also proposes a vehicle provided with the above-described integrated steer suspension drive system to the chassis by wire. For a specific implementation process of the integrated steering suspension driving system for the drive-by-wire chassis, reference may be made to the above description, which is not described in detail in this embodiment.
Preferably, the vehicle has four of the above-described integrated steer suspension drive systems facing the chassis by wire, and the four integrated steer suspension drive systems facing the chassis by wire are independent of each other. Because the wheels are independent, the vehicle can realize a plurality of complex running modes such as Ackerman running, wedge running, arc running, transverse running, pivot steering and the like.
Since the integrated steering suspension drive system for a chassis-by-wire has the above-mentioned effects, a vehicle having the integrated steering suspension drive system for a chassis-by-wire also has corresponding technical effects.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An integrated steer suspension drive system for a chassis-by-wire, comprising: the suspension guide assembly, the steering arm, the steering driving assembly and the wheel assembly; wherein the content of the first and second substances,
the suspension guide assembly can be provided with a steering abdicating space, and the steering arm is arranged at the steering abdicating space in a manner of rotating relative to the suspension guide assembly;
the power input end of the steering arm is connected with the power output end of the steering driving assembly, and the power output end of the steering arm is connected with the wheel assembly and used for driving the wheel assembly to rotate under the driving effect of the steering driving assembly, so that the steering of the wheel assembly is realized.
2. The chassis-by-wire oriented integrated steering suspension drive system of claim 1, wherein the steering drive assembly comprises: the steering motor, the speed reducer and the power connecting shaft are connected; wherein the content of the first and second substances,
the power output end of the steering motor is connected with the power connecting shaft through the speed reducer, the power connecting shaft is used for being connected with the steering arm, and the power output by the steering motor is transmitted to the power connecting shaft after being reduced through the speed reducer so as to drive the steering arm to rotate.
3. The chassis-by-wire facing integrated steering suspension drive system of claim 2,
the power connecting shaft is provided with a through hole to provide a mounting channel for connecting a wheel assembly pipeline and a finished automobile pipeline;
one end of the power connecting shaft is connected with the steering arm, and the other end of the power connecting shaft is provided with a sliding ring, so that a rotating pipeline on the wheel assembly penetrates through the installation channel, and the rotating pipeline on the wheel assembly is connected with a fixed pipeline on the whole vehicle through the sliding ring.
4. The chassis-by-wire facing integrated steering suspension drive system of claim 2, wherein said power connection shaft comprises: the inner spline shaft and the outer spline shaft; wherein, the first and the second end of the pipe are connected with each other,
the internal spline shaft and the external spline shaft are coaxially arranged and are connected through splines, the external spline shaft is used for being connected with a power output end of the speed reducer, and the internal spline shaft is used for being connected with the steering arm to synchronously rotate along with the external spline shaft under the action of the external spline shaft.
5. The chassis-by-wire facing integrated steering suspension drive system of claim 4,
the inner part of the inner spline shaft is provided with a shaft sleeve used for supporting the outer spline shaft;
and a shaft sleeve limiting mechanism is arranged on the inner wall of the outer spline shaft and used for limiting the bottom end of the shaft sleeve.
6. The chassis-by-wire facing integrated steering suspension drive system of claim 2,
the speed reducer is a worm gear mechanism, a worm is connected with the steering motor, and a worm wheel is coaxially arranged with the power connecting shaft and is connected with the power connecting shaft.
7. The chassis-by-wire facing integrated steering suspension drive system of any one of claims 1 to 6, wherein the suspension steering assembly comprises: a support arm and a bifurcating arm; wherein the content of the first and second substances,
the supporting arm is of an arc-shaped structure, the inner circle center side of the supporting arm is used as a steering abdicating space for mounting the steering arm and the wheel assembly so as to abdicate the steering of the wheel assembly;
the double-fork arm is arranged on the outer side of the supporting arm and is respectively hinged with the supporting arm and the frame of the vehicle body, so that the supporting arm, the double-fork arm and the frame of the vehicle body form a four-bar linkage; wherein, the outside of support arm sets up with the interior heart side of support arm is carried on the back mutually.
8. The chassis-by-wire facing integrated steering suspension drive system according to any one of claims 1 to 6, wherein said steering arm is a bent structure comprising: a support connection and a steering connection; wherein, the first and the second end of the pipe are connected with each other,
turn to connecting portion and support connecting portion and be the contained angle setting, enclose and establish and form wheel installation position, support connecting portion are used for connecting the power take off who turns to drive assembly, and wheel assembly sets up in wheel installation position department and connects on turning to connecting portion to turn to under the effect that turns to drive assembly along with turning to connecting portion.
9. The chassis-by-wire facing integrated steering suspension drive system according to any one of claims 1 to 6,
a brake disc is arranged on a hub motor of the wheel assembly; and/or the steering arm is provided with a brake caliper.
10. A vehicle provided with an integrated steering suspension drive system according to any one of claims 1 to 9.
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| CN202211285488.8A CN115519953B (en) | 2022-10-20 | 2022-10-20 | Integrated steering suspension driving system for drive-by-wire chassis and vehicle |
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| CN202211285488.8A CN115519953B (en) | 2022-10-20 | 2022-10-20 | Integrated steering suspension driving system for drive-by-wire chassis and vehicle |
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| CN115519953B CN115519953B (en) | 2023-04-18 |
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| CN115519953B (en) | 2023-04-18 |
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