CN110254500B - Vehicle rear wheel active steering system and vehicle - Google Patents
Vehicle rear wheel active steering system and vehicle Download PDFInfo
- Publication number
- CN110254500B CN110254500B CN201910579688.6A CN201910579688A CN110254500B CN 110254500 B CN110254500 B CN 110254500B CN 201910579688 A CN201910579688 A CN 201910579688A CN 110254500 B CN110254500 B CN 110254500B
- Authority
- CN
- China
- Prior art keywords
- driving
- vehicle
- piece
- rear wheel
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- B62D3/12—Steering gears mechanical of rack-and-pinion type
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Abstract
The invention provides a vehicle rear wheel active steering system and a vehicle, wherein the vehicle rear wheel active steering system comprises a base body and a driving unit which are fixedly arranged on a vehicle body, a driving piece which can bear the driving of the driving unit and move in the base body along the width direction of the vehicle body, and two executing pieces which are connected between the driving piece and wheels on two sides, wherein each executing piece can bear the pushing and pulling of the driving piece to drive the wheels connected with the executing piece to steer, and the driving piece can push the executing piece through an elastic piece or can pull the executing piece through the elastic piece, so that the executing piece has different strokes when bearing and pulling or bearing and pushing, and the rear wheels of the two wheels have different steering angles. The vehicle rear wheel active steering system can actively control the steering of the vehicle rear wheel, improve the flexibility of the steering of the vehicle, simultaneously enable the rear wheels at two sides of the vehicle to have different steering angles, reduce the eccentric wear of the tire and prolong the service life of the tire.
Description
Technical Field
The invention relates to the technical field of vehicle parts, in particular to a vehicle rear wheel active steering system. The invention also relates to a vehicle provided with the active steering system for the rear wheels of the vehicle.
Background
With the development of automobile technology, the requirements on the comfort, the controllability and the safety of an automobile are higher and higher, the existing vehicle only provided with a front wheel for steering is easy to generate oversteer during high-speed turning, and a tail flick phenomenon may occur during serious turning, so that the driving stability of the vehicle is not facilitated, and when the vehicle turns at low speed, particularly large and medium-sized vehicles, the turning radius is large, and the flexibility of the vehicle steering is influenced. The existing front wheel steering system is arranged through hard points, a steering trapezoid can be formed, wheels on two sides can realize different rotating angles during turning, and the rear wheel steering can not realize different rotating angles of the wheels on two sides through the hard points due to the problem of arrangement space, so that eccentric wear of the wheels is easily caused, the service life of tires is influenced, and the driving safety of the vehicles is influenced.
Disclosure of Invention
In view of this, the present invention is directed to provide an active steering system for rear wheels of a vehicle, so as to enable the rear wheels on two sides to have different steering angles when the vehicle is steered, reduce tire wear, and improve the steering performance of the vehicle.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle rear wheel active steering system comprising:
the base body and the driving unit are respectively and fixedly arranged on the vehicle body;
the driving piece is arranged in a penetrating hole formed in the base body in a penetrating mode, a transmission assembly is arranged between the driving piece and the driving unit, and the driving piece is driven by the driving unit to move in the penetrating hole along the width direction of the vehicle body due to the transmission of the transmission assembly;
the actuating pieces are connected to two ends of the driving piece, and the two actuating pieces are respectively connected with two rear wheels of the vehicle; a push part and a pull part are respectively formed on each executing part, the push part and the pull part are formed on the driving part and correspond to the push part and the pull part, and each executing part can be pushed or pulled by the movable driving part to drive the rear wheel connected with the executing part to steer; and elastic pieces are arranged between each pushing part and the corresponding pushing part or between each pulling part and the corresponding pulling part, so that each executing piece has different strokes when pushed or pulled, and the two rear wheels have different steering angles.
Furthermore, the transmission assembly comprises an intermediate piece which can receive the driving of the driving unit and rotate on the base body, and a transmission part is arranged between the intermediate piece and the driving piece, and the driving piece can be driven by the rotation of the intermediate piece to move along the width direction of the vehicle body due to the transmission of the transmission part.
Furthermore, the middle part is provided with a through hole which runs through the middle part along the width direction of the vehicle body, the driving part is arranged in the through hole in a penetrating way, and the transmission part comprises a trapezoidal internal thread which is formed on the inner wall of the through hole and a trapezoidal external thread which is formed on the periphery of the driving part and is matched with the trapezoidal internal thread.
Furthermore, the driving unit adopts a rotary power output unit, the transmission assembly further comprises a first gear sleeved on the power output end of the rotary power unit, an intermediate gear rotatably arranged on the base body and meshed with the first gear, and a second gear fixedly sleeved on the intermediate part and meshed with the intermediate gear.
Further, the intermediate gear includes a large gear and a small gear that are coaxial and fixed together, and the large gear meshes with the first gear, the small gear meshes with the second gear.
Furthermore, a locking assembly is arranged between the driving member and the executing member, a limiting unit is arranged on the base body, and when the driving member and the executing member are reset, the locking assembly can keep the driving member and the executing member locked due to the limitation of the limiting unit, so that the driving member and the executing member synchronously move.
Furthermore, an insertion hole for inserting an end of the driving element is formed at one end of each executing element close to the driving element, and an anti-drop assembly is arranged between the driving element and the executing element and configured to limit the end of the driving element to drop out of the insertion hole.
Furthermore, a through hole is formed in the side wall of the insertion hole, and the locking assembly comprises a locking pin capable of sliding in a reciprocating manner in the through hole along the radial direction of the actuating element and a groove which is formed in the periphery of the driving element and into which the locking pin can be inserted; the penetrating hole comprises a large-diameter section and a small-diameter section which are connected in series, the inner wall surface of the small-diameter section can abut against the locking pin to limit the locking pin from being separated from the groove, and therefore locking between the driving piece and the executing piece is achieved.
Furthermore, the anti-dropping assembly comprises a flange constructed at the end part of the driving piece and a baffle ring constructed on the inner wall of the through hole, and the diameter of the inner hole of the baffle ring is smaller than the outer diameter of the flange, so that the driving piece can push or pull the actuating piece.
Compared with the prior art, the invention has the following advantages:
according to the vehicle rear wheel active steering system, the driving piece capable of bearing the driving unit to drive and linearly move along the width direction of the vehicle body and the executing piece arranged between the driving piece and the wheels are arranged, the rear wheels of the vehicle can be actively steered by pushing or pulling the executing piece by the driving piece, the turning radius of the vehicle can be reduced, and the flexibility of the vehicle can be improved.
Meanwhile, the elastic part is arranged between the push part and the push part or between the pull part and the push part, so that the executing part has different strokes when being pushed or pulled, the executing part at one side bears the pull when the rear wheel of the vehicle turns, and the other side bears the push, so that the wheels at two sides have different strokes, and the wheels at two sides have different turning angles, thereby reducing the eccentric wear of the tire, prolonging the service life of the tire and improving the safety of the vehicle.
Another object of the present invention is to provide a vehicle, wherein the vehicle is provided with the vehicle rear wheel active steering system.
The vehicle of the present invention has the same advantages as the vehicle rear wheel active steering system, and is not described herein again.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic overall structure diagram of a vehicle rear wheel active steering system according to a first embodiment of the invention;
FIG. 2 is an enlarged view at B in FIG. 1;
FIG. 3 is an enlarged view taken at A in FIG. 1;
FIG. 4 is an exploded view of the latch assembly;
FIG. 5 is an enlarged view of FIG. 1 at A in another state;
description of reference numerals:
1-base body, 11-left shell, 12-right shell, 101-through mounting hole, 1011-large diameter section, 1012-small diameter section, 2-driving unit, 3-driving piece, 31-pushing part, 32-pulling part, 33-flange, 4-actuating piece, 41-pushing part, 42-pulling part, 43-baffle ring, 44-pull rod, 45-connecting rod, 401-insertion hole, 402-through hole, 5-transmission component, 51-first gear, 52-middle gear, 521-large gear, 522-small gear, 523-middle gear shaft mounting bearing, 524-middle gear shaft, 53-second gear, 54-middle piece, 541-middle piece mounting bearing, 542-locking nut, 543-locking ring, 6-elastic piece, 7-locking component, 71-locking pin, 72-groove and 8-dustproof sleeve.
Detailed Description
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 embodiments with reference to the attached drawings.
Example one
The present embodiment relates to a vehicle rear wheel active steering system, as shown in fig. 1, the vehicle rear wheel active steering system includes a base 1 and a driving unit 2 respectively fixed on a vehicle body, and a driving member 3 inserted into a through hole 101 formed on the base 1, and a transmission assembly 5 is disposed between the driving member 3 and the driving unit 2, and due to the transmission of the transmission assembly 5, the driving member 3 receives the driving of the driving unit 2 and can move in the base 1 along the width direction of the vehicle body.
In addition, the active steering system for the rear wheels of the vehicle further comprises executing parts 4, wherein the executing parts 4 are specifically two executing parts connected to two ends of the driving part 3, and the two executing parts 4 are further respectively connected with two rear wheels of the vehicle, namely, one executing part 4 is respectively arranged between two ends of each executing part 4 and the corresponding rear wheel of the vehicle; a push part 41 and a pull part 42 are respectively formed on each actuating element 4, a push part 31 and a pull part 32 are formed on the driving element 3 corresponding to the push part 41 and the pull part 42, and each actuating element 4 can be pushed or pulled by the moving driving element 3 to drive the rear wheels of the vehicle connected with the actuating element 4 to steer; and elastic pieces 6 are arranged between each pushing part 41 and the corresponding pushing part 31 and between each pulling part 42 and the corresponding pulling part 32, so that each actuating piece 4 has different strokes when being pushed or pulled, and because one side is pulled and the other side is pushed when the rear wheels of the vehicles are steered, the rear wheels of the two vehicles can have different steering angles.
In this embodiment, as shown in fig. 1 and 2, the base 1 includes a left housing 11 and a right housing 12 that are fastened and fixed in the vehicle direction to facilitate mounting of the driving unit 3 and the transmission assembly 5, which will be described later, and the insertion hole 101 is provided through the left housing 11 and the right housing 12 in the width direction of the vehicle body.
In this embodiment, the driving member 3 is cylindrical, and a preferred structure for driving the driving member 3 to move linearly in the through hole 101 is shown in fig. 1 and fig. 2, the driving unit 2 is a rotary power output unit, and the driving unit 2 is preferably a motor, the transmission assembly 5 includes a first gear 51 fixedly sleeved on a motor shaft, an intermediate gear 52 rotatably disposed on the base 1 and engaged with the first gear 51, an intermediate member 54 rotatably disposed on the base 1, and a second gear 53 fixedly sleeved on the intermediate member 54 and engaged with the intermediate gear 52, and the intermediate member 54 can be driven to rotate on the base 1 by the rotation of the motor shaft through the structural arrangement of the transmission assembly 5. A transmission portion is provided between the intermediate member 54 and the driver 3, and the driver 3 is linearly movable in the vehicle width direction by the rotation of the intermediate member 54 due to the transmission of the transmission portion.
Specifically, in the present embodiment, as shown in fig. 1 and 2, a through hole is formed in the intermediate member 54 so as to extend through the intermediate member 54 in the vehicle width direction, the driving member 3 is inserted into the through hole, and the driving portion provided between the intermediate member 54 and the driving member 3 includes a trapezoidal internal thread formed on the inner wall of the through hole and a trapezoidal external thread formed on the outer periphery of the driving member 3 and matching with the trapezoidal internal thread, wherein the trapezoidal internal thread is preferably arranged in the entire length direction of the through hole for a good transmission effect, and of course, it is still possible to arrange the trapezoidal internal thread only in one section of the through hole.
In the transmission mechanism for converting rotary motion into linear motion, compared with a ball screw pair or a rack and pinion which is generally considered to have a better transmission effect, the inventor finds that the transmission part is set to be in transmission fit with trapezoidal internal threads and trapezoidal external threads, and has a self-locking function due to the fit of the trapezoidal threads, so that the driving part 3 can be driven by a motor to move linearly to drive the rear wheel to turn, but when the rear wheel of the vehicle is subjected to steering force of the ground, particularly uneven ground, the driving part 3 cannot be driven to move due to the self-locking function of the trapezoidal threads, namely the rear wheel cannot swing due to uneven ground. Therefore, this embodiment sets up this transmission portion for trapezoidal thread fit, and accessible comparatively simple mode effectively ensures that the rear wheel does not lead to the vehicle off tracking because of the uneven swing that produces in road surface.
In this embodiment, referring to fig. 2, the transmission assembly 5 is specifically mounted in a manner that opposite mounting holes are respectively formed in the left housing 11 and the right housing 12, an intermediate gear shaft mounting bearing 523 is press-fitted into each of the two mounting holes in an interference manner, an intermediate gear shaft 524 is press-fitted into an inner hole of the intermediate gear shaft mounting bearing 523 in an interference manner, and the intermediate gear 52 is fixedly fitted on the intermediate gear shaft 524, for example, the intermediate gear 52 is connected with the intermediate gear shaft 524 in a key manner, so that the intermediate gear 52 can rotate relative to the base 1.
Among them, the two intermediate gear shaft mounting bearings 523 are preferably needle roller bearings. Meanwhile, a mounting groove for receiving the intermediate piece mounting bearing 541 is further formed on the base body 1, the intermediate piece mounting bearing 541 is press-fitted into the mounting groove with interference, and the intermediate piece 54 is press-fitted into the inner hole of the intermediate piece mounting bearing 541 with interference so that the intermediate piece 54 can rotate relative to the base body 1, and at the same time, as shown in fig. 2, a lock nut 542 and a lock ring 543 are fixedly mounted on the intermediate piece 54 at both sides of the intermediate piece mounting bearing 541, respectively, to maintain the axial position of the intermediate piece 54, wherein the intermediate piece mounting bearing 541 preferably employs a deep groove ball bearing.
In this embodiment, the motor shaft is inserted into the base 1, the first gear 51 fixedly sleeved on the motor shaft is engaged with the intermediate gear 52, the intermediate gear 52 is engaged with the second gear 53 fixedly sleeved on the intermediate member 54, so that the intermediate member 54 can be driven to rotate by the rotation of the motor shaft through the first gear 51, the intermediate gear 52 and the second gear 53 in sequence, wherein the intermediate gear 52 preferably adopts a coaxial two-stage gear, that is, the intermediate gear 52 includes two coaxial large gears 521 and small gears 522 fixed together, specifically, the large gear 521 is engaged with the first gear 51, and the small gears 522 are engaged with the second gear 53. By providing the intermediate gear 52 as a two-stage gear, two-stage speed reduction is achieved, the outer diameter dimension of the gear 522 can be reduced, and the space occupation of the transmission assembly 5, that is, the vehicle rear wheel active steering system, can be reduced.
As shown in fig. 1 and 3, an insertion hole 401 for inserting an end of the driving member 3 is formed in an end surface of each actuating member 4 near one end of the driving member 3, and a disengagement preventing member is provided between each actuating member 4 and the driving member 3, and is configured to limit the disengagement of the end of the driving member 3 in the insertion hole 401.
One preferred construction of the anti-slip assembly is shown in fig. 1 and 3 and includes a flange 33 formed on the outer periphery of the end of the driver 3, and a retainer ring 43 formed on the inner wall of the insertion hole 401 of the actuator 4, the diameter of the inner hole of the retainer ring 43 being larger than the diameter of the driver 3 and smaller than the outer diameter of the flange 33, thereby preventing the flange 33 from slipping out of the insertion hole 401. The flange 33 is preferably formed integrally with the drive element 3, while the stop ring 43 is preferably detachably fastened to the actuating element 4, for example, a stop ring mounting hole which is connected in series with the insertion opening 401 and has a larger diameter than the insertion opening 401 can be provided in the actuating element 4, and the stop ring 43 is fastened to a step surface between the insertion opening 401 and the stop ring mounting hole by means of bolts which penetrate through the stop ring in the radial direction.
Meanwhile, the inner side surface of the retainer ring 43 forms the above-mentioned pulling part 42, and the bottom surface of the insertion hole 401 forms the above-mentioned pushing part 41; the side of the flange 33 facing the inner side of the stop ring 43 constitutes the pull portion 32, while the end of the drive element 3 constitutes the push portion 31. In the present embodiment, the active steering system for the rear wheel of the vehicle is described by taking the elastic element 6 disposed between the pulling portion 32 and the supporting portion 42 as an example, wherein the connection manner between the actuating element 4 and the rear wheel of the vehicle can refer to the existing mature method and is not described herein again, and the elastic element 6 is a spring sleeved on the driving element 3.
When the vehicle turns to the left, in order to reduce the turning radius of the vehicle, the rear wheel of the vehicle needs to turn to the right, and the steering angle of the rear wheel on the left side should be larger than that of the rear wheel on the right side, in this embodiment, refer to fig. 1, in which the actuating member 4 on the lower side of fig. 1 is connected with the rear wheel on the left side according to the direction of fig. 1. When the vehicle turns to the left, the vehicle control system sends a signal to the motor to rotate the motor, so as to drive the driving member 3 to move to the left, i.e. move downwards in fig. 1, and further description is omitted later.
At this time, the driving member 3 pushes the actuating member 4 connected to the left rear wheel leftward, which is referred to as the left actuating member hereinafter, and pulls the actuating member 4 connected to the right rear wheel leftward, which is referred to as the right actuating member hereinafter, because the pushing portion 31 of the driving member 3 is hard-connected to the pushing portion 41 of the left actuating member, i.e., the stroke of the left actuating member pushed by the driving member 3 is equal to the stroke of the driving member 3, and the stroke of the right actuating member pulled by the driving member 3 is equal to the stroke of the driving member 3 minus the compression stroke of the elastic member 6, the stroke of the left actuating member is greater than the stroke of the right actuating member, so that the steering angle of the left rear wheel is greater than the steering angle of the right rear wheel. When the vehicle turns right, the principle is the same as that of turning left, and the description is omitted here.
It should be noted that, by changing the connection position between the actuating member 4 and the wheel, the left and the rear wheels are driven to turn right instead of being pulled, which is the case of pushing, and at this time, it is also feasible to arrange the elastic member 6 between the pushing portion 41 and the pushing portion 31, which is not described herein again, and in addition, an insertion hole may be arranged on the driving member 3, and the end of the actuating member 4 is inserted into the driving member 3.
In this embodiment, the left steering of the vehicle is still taken as an example to describe the scheme, when the driving element 3 pushes the actuating element 4 to the left to complete the left rear wheel steering, and the rear wheel of the vehicle is reset, the motor is controlled to move in the opposite direction to drive the driving element 3 to move in the opposite direction, the driving element 3 can pull the left actuating element to the right, and because the elastic element 6 is arranged between the driving element 3 and the left actuating element, the driving element 3 can hardly drive the actuating element 4 to completely reset.
In order to avoid the situation that the actuating element 4 is difficult to completely reset, in the embodiment, the locking assembly 7 is arranged between the driving element 3 and the actuating element 4, and the limiting unit is arranged on the base body 1, when the driving element 3 and the actuating element 4 are reset, the locking assembly 7 can keep the locking of the driving element 3 and the actuating element 4 due to the limiting of the locking assembly 7 by the limiting unit, so that the driving element 3 and the actuating element 4 can synchronously move when the actuating element 4 is reset.
Specifically, in this embodiment, as shown in fig. 1, 3 and 4, a through hole 402 is formed through a sidewall of the insertion hole 401 of the actuator 4, and the through hole 402 is preferably formed through a sidewall of the retainer ring 43, the locking assembly 7 includes a locking pin 71 inserted into the through hole 402, the locking pin 71 can slide back and forth in the through hole 402 along a radial direction of the actuator 4, the locking assembly 7 further includes a groove 72 formed on an outer periphery of the actuator 3, when the locking pin 71 is inserted into the groove 72, locking of the actuator 3 and the actuator 4 is formed, so that the actuator 3 and the actuator 4 can move synchronously, and when the locking pin 71 is disengaged from the groove 72, unlocking of the actuator 3 and the actuator 4 is formed, so that the actuator 4 can move relative to the actuator 3.
In order to prevent the locking pin 71 from coming out of the through hole 402, in this embodiment, the through hole 402 preferably adopts a stepped hole, that is, the through hole 402 includes a large-diameter hole and a small-diameter hole connected in series, and compared with the large-diameter hole, the small-diameter hole is far away from the insertion hole 401 and corresponds to the large-diameter hole and the small-diameter hole, the locking pin 71 respectively includes a large-diameter locking pin section and a small-diameter locking pin section connected in series, wherein the large-diameter locking pin section and the small-diameter locking pin section respectively form clearance fit with the large-diameter hole and the small-diameter hole, and the diameter of the large-diameter locking pin section is larger than the diameter of the small-diameter hole, so that the small-diameter hole prevents the large-diameter locking pin section from coming out. In order to facilitate the sliding fit of the lock pin 71 with the groove 72 and the fit with the position limiting unit, in the embodiment, the ends of the large diameter section and the small diameter section of the lock pin are configured to be spherical, and the groove 72 is also configured to be an arc-shaped groove.
As shown in fig. 4, the through hole 101 includes a large diameter section 1011 in the middle and a small diameter section 1012 connected in series with both ends of the large diameter section 1011, and a transition section with a tapered cross section is provided between the large diameter section 1011 and the small diameter sections 1012, and when the rear wheel is not steered, i.e., when the driving element 3 is in the initial position, the through hole 402, i.e., the locking pin 71, is preferably located in the large diameter section 1011, and is preferably located close to the transition section.
As shown in fig. 3, when the vehicle turns left and the driver 3 pushes the left actuator, the locking pin 71 is pressed by the inner wall of the small diameter section 1012 and can be inserted into the groove 72, and insertion of the locking pin 71 into the groove 72 is maintained, when the driver 3 pushes the left actuator to the left, and when the driver 3 and the left actuator are reset, the driver 3 and the actuator 4 can be synchronously moved between the locking pin 71 moving to the large diameter section 1011, thereby ensuring complete resetting of the driver 3 and the left actuator.
When the vehicle moves to the right, when the driving element 3 pulls the left actuating element from the initial position, as shown in fig. 5, the locking pin 71 is located at the large diameter section 1011, and the bottom surface of the locking pin 71 is spherical, so that the locking pin 71 is pushed out upwards under the pulling force of the driving element 3, which can form the disengagement of the driving element 3 and the actuating element 4, so that the driving element 3 can move relative to the actuating element 4. The right executive component and the left executive component have the same working principle when working, and the description is omitted here.
In addition, in the embodiment, as shown in fig. 1, each of the actuating members 4 specifically includes a pull rod 44 connected to the rear wheel of the vehicle, and a connecting rod 45 connected to the pull rod 44 in series and connected to the driving member 3, and the connecting rod 45 is partially inserted into the insertion hole 101 so as to be guided and slid by the insertion hole 101. In addition, in order to prevent dust from entering the insertion hole 101, in the present embodiment, as shown in fig. 1, a dust-proof cover 8 which can be extended and contracted along with the extension and contraction of the pull rod 44 is further fitted between the base body 1 and the pull rod 44.
In conclusion, the vehicle rear wheel active steering system of the embodiment can actively control the steering of the vehicle rear wheel, so that the vehicle has better steering flexibility, and meanwhile, the rear wheels on two sides can have different steering angles, so that the eccentric wear of the tire can be reduced, the service life of the tire can be prolonged, and in addition, when the vehicle is not actively steered, the rear wheel can be prevented from deviating and losing control due to uneven road surface due to the self-locking function of the trapezoidal thread.
Example two
The embodiment relates to a vehicle, wherein a vehicle rear wheel active steering system is arranged on the vehicle.
The vehicle of the embodiment has better steering flexibility, can reduce the eccentric wear of the tire and improve the safety of the vehicle.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A vehicle rear wheel active steering system, comprising:
the base body (1) and the driving unit (2) are respectively and fixedly arranged on the body of the vehicle;
the driving part (3) is arranged in a penetrating hole (101) formed in the base body (1) in a penetrating mode, a transmission assembly (5) is arranged between the driving part (3) and the driving unit (2), and due to the transmission of the transmission assembly (5), the driving part (3) bears the driving of the driving unit (2) and can move in the penetrating hole (101) along the width direction of the vehicle body;
the actuating pieces (4) are connected to two ends of the driving piece (3), and the two actuating pieces (4) are respectively connected with two rear wheels of the vehicle; a push part (41) and a pull part (42) are respectively formed on each executing part (4), a push part (31) and a pull part (32) are formed on the driving part (3) corresponding to the push part (41) and the pull part (42), and each executing part (4) can be pushed or pulled by the moving driving part (3) to drive the rear wheel connected with the executing part (4) to rotate; and an elastic element (6) is arranged between each pushing part (41) and the corresponding pushing part (31) or between each pulling part (42) and the corresponding pulling part (32), so that each actuating element (4) has different strokes when pushed or pulled, and the two rear wheels have different steering angles.
2. The vehicle rear wheel active steering system according to claim 1, characterized in that: the transmission assembly (5) comprises an intermediate piece (54) which can receive the driving of the driving unit (2) and rotate on the base body (1), a transmission part is arranged between the intermediate piece (54) and the driving piece (3), and the driving piece (3) can be driven by the rotation of the intermediate piece (54) to move along the width direction of the vehicle body due to the transmission of the transmission part.
3. The vehicle rear wheel active steering system according to claim 2, characterized in that: a through hole penetrating through the intermediate piece (54) along the width direction of the vehicle body is formed in the intermediate piece (54), the driving piece (3) penetrates through the through hole, and the transmission part comprises a trapezoidal internal thread formed on the inner wall of the through hole and a trapezoidal external thread formed on the periphery of the driving piece (3) and matched with the trapezoidal internal thread.
4. The vehicle rear wheel active steering system according to claim 2, characterized in that: the driving unit (2) adopts a rotary power output unit, the transmission assembly (5) further comprises a first gear (51) sleeved on a power output end of the rotary power output unit, an intermediate gear (52) which is rotatably arranged on the base body (1) and meshed with the first gear (51), and a second gear (53) which is fixedly sleeved on the intermediate part (54) and meshed with the intermediate gear (52).
5. The vehicle rear wheel active steering system according to claim 4, characterized in that: the intermediate gear (52) comprises a large gear (521) and a small gear (522) which are coaxial and fixed together, the large gear (521) is meshed with the first gear (51), and the small gear (522) is meshed with the second gear (53).
6. The vehicle rear wheel active steering system according to any one of claims 1 to 5, characterized in that: a locking assembly (7) is arranged between the driving part (3) and the executing part (4), a limiting unit is arranged on the base body (1), and when the driving part (3) and the executing part (4) reset, the locking assembly (7) can keep the locking of the driving part (3) and the executing part (4) due to the limiting of the limiting unit, so that the driving part (3) and the executing part (4) synchronously move.
7. The vehicle rear wheel active steering system according to claim 6, characterized in that: an insertion hole (401) for inserting the end part of the driving element (3) is formed at one end of each executing element (4) close to the driving element (3), and an anti-drop assembly is arranged between the driving element (3) and the executing element (4), wherein the anti-drop assembly is configured to form a limit for dropping out of the end part of the driving element (3) in the insertion hole (401).
8. The vehicle rear wheel active steering system according to claim 7, characterized in that: a through hole (402) is formed in the side wall of the insertion hole (401), the locking assembly (7) comprises a locking pin (71) which can slide in a reciprocating manner in the through hole (402) along the radial direction of the actuating element (4), and a groove (72) which is formed in the outer periphery of the driving element (3) and into which the locking pin (71) can be inserted; the penetrating hole (101) comprises a large-diameter section (1011) and a small-diameter section (1012) which are connected in series, the inner wall surface of the small-diameter section (1012) can abut against the locking pin (71) to limit the locking pin (71) from being separated from the groove (72), and therefore locking between the driving piece (3) and the executing piece (4) is achieved.
9. The vehicle rear wheel active steering system according to claim 8, characterized in that: the anti-falling assembly comprises a flange (33) constructed at the end part of the driving piece (3) and a retaining ring (43) constructed on the inner wall of the through hole (402), and the diameter of the inner hole of the retaining ring (43) is smaller than the outer diameter of the flange (33), so that the driving piece (3) can push or pull the actuating piece (4).
10. A vehicle, characterized in that: a vehicle rear wheel active steering system according to any one of claims 1 to 9 provided on the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910579688.6A CN110254500B (en) | 2019-06-28 | 2019-06-28 | Vehicle rear wheel active steering system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910579688.6A CN110254500B (en) | 2019-06-28 | 2019-06-28 | Vehicle rear wheel active steering system and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110254500A CN110254500A (en) | 2019-09-20 |
| CN110254500B true CN110254500B (en) | 2020-09-18 |
Family
ID=67923313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910579688.6A Active CN110254500B (en) | 2019-06-28 | 2019-06-28 | Vehicle rear wheel active steering system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110254500B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101391619A (en) * | 2007-09-20 | 2009-03-25 | 光阳工业股份有限公司 | Limiting mechanism for carriage steerage gear |
| CN103038123A (en) * | 2010-06-14 | 2013-04-10 | 本田技研工业株式会社 | Controllable steering rack guide system |
| CN104169159A (en) * | 2012-03-14 | 2014-11-26 | 韩国德尔福汽车***公司 | Rack bar supporting device for steering gear |
| KR20150024553A (en) * | 2013-08-27 | 2015-03-09 | 주식회사 만도 | Rack and Pinion Type Steering Apparatus |
| CN109591882A (en) * | 2017-09-30 | 2019-04-09 | 比亚迪股份有限公司 | Rear-axle steering device, vehicle and its rear-wheel steering system |
| DE102018127166A1 (en) * | 2017-11-03 | 2019-05-09 | Steering Solutions Ip Holding Corporation | Clamping adjusting plug |
-
2019
- 2019-06-28 CN CN201910579688.6A patent/CN110254500B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101391619A (en) * | 2007-09-20 | 2009-03-25 | 光阳工业股份有限公司 | Limiting mechanism for carriage steerage gear |
| CN103038123A (en) * | 2010-06-14 | 2013-04-10 | 本田技研工业株式会社 | Controllable steering rack guide system |
| CN104169159A (en) * | 2012-03-14 | 2014-11-26 | 韩国德尔福汽车***公司 | Rack bar supporting device for steering gear |
| KR20150024553A (en) * | 2013-08-27 | 2015-03-09 | 주식회사 만도 | Rack and Pinion Type Steering Apparatus |
| CN109591882A (en) * | 2017-09-30 | 2019-04-09 | 比亚迪股份有限公司 | Rear-axle steering device, vehicle and its rear-wheel steering system |
| DE102018127166A1 (en) * | 2017-11-03 | 2019-05-09 | Steering Solutions Ip Holding Corporation | Clamping adjusting plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110254500A (en) | 2019-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7950301B2 (en) | Feed screw mechanism | |
| EP2110580B1 (en) | Ball screw mechanism and electric power steering device using the same | |
| JP4464955B2 (en) | Telescopic actuator | |
| US9387874B2 (en) | Rear wheel steering apparatus for vehicle | |
| CN109923767B (en) | Electric actuator | |
| US20100319471A1 (en) | Rack assist type electric power steering system | |
| EP2530343A1 (en) | Coupling structure and steering device | |
| JP6696811B2 (en) | Sensor target, movable unit including the target, and electric actuator | |
| CN110254500B (en) | Vehicle rear wheel active steering system and vehicle | |
| US11143284B2 (en) | Floating worm bearing bore offset | |
| US10935131B2 (en) | Vehicle park lock assembly | |
| CN113524993B (en) | Self-locking electric trailer hook device | |
| KR20210102783A (en) | Steer-by-wire type steering apparatus | |
| CN104742956B (en) | Steering link structure of rear wheel steering device | |
| EP2233376B1 (en) | Supporting device | |
| US11623682B2 (en) | Steer-by-wire steering system having a spindle drive | |
| CN110937014A (en) | Worm and gear clearance self-adjusting structure | |
| JP5090991B2 (en) | Steering device | |
| KR20110092661A (en) | Rack bar supporting device of steering apparatus for vehicle | |
| US20100095793A1 (en) | Steering device using ball screw | |
| JP2008232185A (en) | Ball screw mechanism | |
| CN209972427U (en) | Vehicle electronic parking braking power device and vehicle electronic parking braking system | |
| CN217294140U (en) | Power transmission mechanism of mobile carrier, driving device and mobile carrier | |
| US20070012126A1 (en) | Electro-mechanical screw actuator assembly | |
| KR101189304B1 (en) | The Rack Bar Supporting Device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |