Wheel steering system and vehicle

Abstract

The utility model provides a wheel steering system and vehicle, auxiliary frame, swing arm, actuator and steering pull rod group, wherein one end of swing arm is arranged on auxiliary frame in swing, and the other end is connected with wheel, can when the vehicle running wheel encounters the uneven ground, swing arm can swing relative to auxiliary frame, makes vehicle running more stable. The actuator controls steering of wheels by driving the steering pull rod set and is fixed to the auxiliary frame, the steering pull rod set comprises a connecting arm, the distance between a main connecting point position of the connecting arm and a first connecting point position is smaller than the distance between the main connecting point position and a second connecting point position, and when the output end of the actuator does linear motion, the steering pull rod set drives the actuator to rotate. One end of the first connecting point of the connecting arm is pushed, the connecting arm rotates relative to the main connecting point, the rotating angle of the first connecting point is larger than that of the second connecting point, and therefore a short-stroke rack in the actuator can control a wheel to rotate at a large angle through the connecting arm.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially relates to a wheel steering system and vehicle. BACKGROUND

[0002] With the diversification development of automobile, the user's demand for automobile function increases, such as the user needs that the vehicle can make U-turn, crab drive etc., but the left and right wheels of the existing automobile wheel steering system cannot realize large angle steering, therefore cannot realize the above-mentioned function. SUMMARY

[0003] Therefore, the utility model discloses a wheel steering system and vehicle to solve the problem of the existing automobile steering system left and right wheel steering.

[0004] In order to achieve the above purpose, the utility model provides a wheel steering system, which comprises:

[0005] Subframe;

[0006] Swing arm, the swing arm swing setting is on the subframe, and one end of the swing arm away from the subframe is connected with the wheel;

[0007] Actuator, fixed on the subframe;

[0008] Steering tie rod group, including connecting arm, the connecting arm includes first connecting point, second connecting point and the main connecting point between the first connecting point and the second connecting point, the main connecting point is rotationally connected with the swing arm, the first connecting point is rotationally connected with the output end of the actuator, and the second connecting point is rotationally connected with the steering knuckle of the wheel;

[0009] Wherein, the distance between the main connecting point and the first connecting point is less than the distance between the main connecting point and the second connecting point, so that the rotation angle of the first connecting point is less than the rotation angle of the second connecting point in the case that the output end of the actuator does linear motion.

[0010] Optionally, the distance between the main connecting point and the second connecting point is twice the distance between the main connecting point and the first connecting point.

[0011] Optionally, the main connecting point and the swing arm are rotationally connected through the main ball pin, the first connecting point and the actuator are rotationally connected through the first ball pin, and the second connecting point and the steering knuckle are rotationally connected through the second ball pin.

[0012] Optionally, the steering pull rod set further comprises a first steering pull rod, one end of the first steering pull rod is rotationally connected with the output end of the actuator, and the other end of the first steering pull rod is connected with the first connecting point through the first ball pin.

[0013] Optionally, the steering pull rod set further comprises a second steering pull rod, one end of the second steering pull rod is connected with the second connecting point through the second ball pin, and the other end of the second steering pull rod is rotationally connected with the steering knuckle.

[0014] Optionally, the length of the first steering pull rod is less than or equal to the length of the second steering pull rod.

[0015] Optionally, the swing arm is provided with a support rod, the main ball pin is arranged on the support rod, and the connecting arm is fixed on the main ball pin.

[0016] Optionally, the support rod is arranged at the top of the swing arm, one end of the support rod is fixedly connected with the swing arm, the other end of the support rod is provided with a main ball pin hole, the main ball pin is arranged in the main ball pin hole, a fixed end of the main ball pin faces the upper side of the support rod, and the main ball pin penetrates through the connecting arm and is arranged above the support rod, so that the connecting arm is rotationally arranged above the support rod.

[0017] Optionally, the wheel, the actuator and the steering pull rod set are in one-to-one correspondence, so that one wheel is controlled to steer by one actuator through one steering pull rod set.

[0018] The second aspect of the utility model provides a kind of vehicle, comprising the first aspect of the utility model provides a kind of wheel steering system.

[0019] From the above, it can be seen that the utility model provides a kind of vehicle wheel steering system and vehicle, its vehicle wheel steering system includes: subframe, swing arm, actuator and steering drag link group, wherein, swing arm one end swing setting is in subframe, other end is connected with wheel, when the wheel of vehicle is encountered uneven ground, swing arm swing relative to subframe, make vehicle travel more stable.Actuator controls the steering of wheel by driving steering drag link group, and is fixed on subframe, steering drag link group includes connecting arm, connecting arm includes first connecting point, second connecting point and main connecting point between first connecting point and second connecting point, main connecting point is rotatably connected with swing arm, that is, connecting arm is rotatably set on swing arm by main connecting point, first connecting point is connected with the output end of actuator, second connecting point is rotatably connected with the steering knuckle of wheel, so that the one end of connecting arm is moved by actuator, make connecting arm rotate on swing arm, to drive wheel steering by other end.The distance between main connecting point and first connecting point is less than the distance between main connecting point and second connecting point, when the output end of actuator does linear motion, the one end of first connecting point of connecting arm is pushed, make connecting arm rotate relative to main connecting point, to drive the steering of wheel connected with second connecting point, the rotation angle of first connecting point is greater than the rotation angle of second connecting point, so that, the short stroke rack in actuator can be realized by connecting arm to control the rotation of wheel with large angle. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the utility model or related art, the following will briefly introduce the drawings needed to be used in embodiment or related art description, obviously, the drawings in the following description are only embodiment of the utility model, for ordinary skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0021] Figure 1 It is a kind of vehicle wheel steering system structural schematic diagram for the embodiment of the utility model;

[0022] Figure 2 It is the enlarged schematic view of A in the embodiment of the utility model Figure 1

[0023] Figure 3 It is the connecting arm structural schematic diagram for the embodiment of the utility model.

[0024] Reference signs:

[0025] ​1. subframe; 2. swing arm; 5. knuckle; 6. shock absorber; 3. actuator; 4. steering tie rod set; 40. main ball pin; 41. connecting arm; 42. first steering tie rod; 43. second steering tie rod; 44. support rod; 411a. first ball pin; 411b. second ball pin; 411. main connecting point; 412. first connecting point; 413. second connecting point. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood as the common meanings understood by those skilled in the art to which the present application belongs. The terms "first", "second" and similar terms used in the embodiments of the present application do not represent any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0028] As described in the background section, in the existing automobile wheel steering system, the left and right wheels are connected together through the steering gear assembly, that is, the left and right wheels are synchronously controlled to rotate through the steering gear assembly, so that each wheel cannot rotate independently. If the steering gear assembly is separated in order to enable each wheel to rotate independently, so that each steering gear controls one wheel, it is equivalent to splitting a larger steering gear assembly into small steering gear assemblies corresponding to two wheels. Then, the rack in the larger steering gear will be divided into two parts, and since the steering gear needs to be assembled with a housing, the rack in the small steering gear will inevitably be shortened, thereby reducing the available rack stroke of the steering gear, that is, reducing the movement distance of the output end of the steering gear, thereby reducing the steering angle of the wheel, and the wheel cannot rotate at a large angle.

[0029] In order to solve the above technical problems, the utility model discloses a kind of vehicle wheel steering systems, vehicle wheel steering system includes: auxiliary frame 1, swing arm 2, actuator 3 and steering tie rod group 4, wherein, steering tie rod group 4 includes connecting arm 41, connecting arm 41 main connection point 411 is rotationally connected with swing arm 2, that is, connecting arm 41 is rotationally arranged on swing arm 2 by main connection point 411, first connection point 412 is connected with the output end of actuator 3, second connection point 413 is rotationally connected with the steering knuckle 5 of vehicle wheel, so that the end of connecting arm 41 is moved by actuator 3, make connecting arm 41 rotate on swing arm 2, to drive vehicle wheel steering by other end. Wherein the distance L1 between main connection point 411 and first connection point 412 is less than the distance L2 between main connection point 411 and second connection point 413, when the output end of actuator 3 does linear motion, the end of first connection point 412 of connecting arm 41 is pushed, make connecting arm 41 rotate relative to main connection point 411, to drive the steering of vehicle wheel connected with second connection point 413, the rotation angle of first connection point 412 is greater than the rotation angle of second connection point 413, so, it can be achieved that actuator 3 is short stroke rack control vehicle wheel large angle rotation by connecting arm 41.

[0030] The embodiments of the utility model are described in detail below with reference to the drawings.

[0031] Refer to Figure 1 And Figure 2 The utility model provides a kind of vehicle wheel steering system, comprising:

[0032] Auxiliary frame 1;

[0033] Swing arm 2, the swing arm 2 swing setting on the auxiliary frame 1, the end of the swing arm 2 away from auxiliary frame 1 is connected with vehicle wheel;

[0034] Actuator 3, fixed on the auxiliary frame 1;

[0035] Steering tie rod group 4, including connecting arm 41, the connecting arm 41 includes first connection point 412, second connection point 413 and the main connection point 411 between first connection point 412, second connection point 413, the main connection point 411 is rotationally connected with the swing arm 2, the first connection point 412 is rotationally connected with the output end of actuator 3, the second connection point 413 is rotationally connected with the steering knuckle 5 of vehicle wheel;

[0036] The distance L1 between the main connection point 411 and the first connection point 412 is less than the distance L2 between the main connection point 411 and the second connection point 413, so that the rotation angle of the first connection point 412 is less than the rotation angle of the second connection point 413 in the case of linear motion of the output end of the actuator 3.

[0037] Specifically, as shown in Figure 1 and Figure 3 In the utility model, taking a four-wheel vehicle as an example, the auxiliary frame can include a front auxiliary frame and a rear auxiliary frame, the front auxiliary frame is connected with front wheels through a front suspension system, and the rear auxiliary frame is connected with rear wheels through a rear suspension system, the front suspension system includes left and right front swing arms, the rear suspension system includes left and right rear swing arms, one end of the left and right front swing arms is swingably arranged on the front auxiliary frame, and the other end is connected with the left and right front wheels. One end of the left and right rear swing arms is swingably arranged on the rear auxiliary frame, and the other end is connected with the left and right rear wheels. The actuator 3 for controlling the left and right front wheels is installed on the front auxiliary frame, and the actuator 3 for controlling the left and right rear wheels is installed on the rear auxiliary frame. In the utility model, as shown in Figure 1 Taking the rear auxiliary frame 1 as an example, the swing arm 2 includes left and right rear swing arms, taking the left rear swing arm as an example, the wheel includes left and right rear wheels, and taking the left rear wheel as an example. One end of the swing arm 2 is swingably arranged on the auxiliary frame 1, and the other end is connected with the brake disc of the wheel, so that when the wheels of the vehicle meet uneven ground during driving, the swing arm 2 swings relative to the auxiliary frame 1, so that the vehicle drives more stably. The actuator 3 controls the steering of the wheel by driving the steering pull rod set 4 and is fixed on the auxiliary frame 1, the steering pull rod set 4 includes a connecting arm 41, the connecting arm 41 includes a first connection point 412, a second connection point 413 and a main connection point 411 located between the first connection point 412 and the second connection point 413, the main connection point 411 is rotatably connected with the swing arm 2, that is, the connecting arm 41 is rotatably arranged on the swing arm 2 through the main connection point 411, the first connection point 412 is connected with the output end of the actuator 3, and the second connection point 413 is rotatably connected with the steering knuckle 5 of the wheel, so that one end of the connecting arm 41 is moved by the actuator 3, so that the connecting arm 41 rotates on the swing arm 2, thereby driving the other end to steer the wheel. The distance L1 between the main connection point 411 and the first connection point 412 is less than the distance L2 between the main connection point 411 and the second connection point 413, so that when the output end of the actuator 3 moves linearly, the first connection point 412 of the connecting arm 41 is pushed, so that the connecting arm 41 rotates relative to the main connection point 411, thereby driving the wheel connected with the second connection point 413 to steer, and the rotation angle of the first connection point 412 is greater than the rotation angle of the second connection point 413. In this way, the actuator 3 can realize the control of the large-angle rotation of the wheel through the short-stroke rack of the connecting arm 41.

[0038] In some embodiments, as shown in Figure 1 and Figure 2 The wheel steering system in the utility model can realize independent steering control of each wheel, specifically: the wheel, the actuator 3 and the steering pull rod set 4 are one-to-one corresponding, so that the actuator 3 controls the wheel steering through the steering pull rod set 4.

[0039] Specifically, in the utility model, taking a four-wheel vehicle as an example, the wheels include two front wheels and two rear wheels, the actuators 3 include four, the four actuators 3 are one-to-one corresponding to the four wheels, the steering pull rod sets 4 include four sets, and one actuator 3 controls the corresponding wheel through one set of steering pull rod sets 4. Specifically, taking the two rear wheels as an example, the two rear wheels are symmetrically arranged, the two actuators 3 are symmetrically fixed on the auxiliary frame 1, the output ends of the actuators 3 are all directed to the corresponding wheels, the steering pull rod set 4 is rotatably arranged on the swing arm 2, one end of the steering pull rod set 4 is connected with the output end of the actuator 3, and the other end of the steering pull rod set 4 is connected with the steering knuckle 5 of the wheel, so that the actuator 3 drives the wheel steering through the steering pull rod set 4, and independent control of the wheel steering is realized.

[0040] The following embodiments all take one wheel, one actuator 3 and one steering pull rod set 4 as an example, for example, taking the left rear wheel, the actuator 3 corresponding to the left rear wheel and the steering pull rod set 4 corresponding to the left rear wheel as an example for description.

[0041] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 Since the main connecting point 411 of the connecting arm 41 is located between the first connecting point 412 and the second connecting point 413, in order to realize that the wheel steering is at the maximum angle, the distance L2 between the main connecting point 411 and the second connecting point 413 is twice the distance L1 between the main connecting point 411 and the first connecting point 412.

[0042] Specifically, the first connection point 412 is located at one end of the connecting arm 41, the second connection point 413 is located at the other end of the connecting arm 41, and the main connection point 411 is located at the middle of the connecting arm 41. The distance L2 between the main connection point 411 and the second connection point 413 is twice the distance L1 between the main connection point 411 and the first connection point 412, so that when the actuator 3 pushes the one end of the first connection point 412 of the connecting arm 41, the rotation angle of the one end of the second connection point 413 of the connecting arm 41 is twice the rotation angle of the one end of the first connection point 412 of the connecting arm 41, thereby enabling the short rack stroke in the actuator 3 to control the wheels to rotate by a large angle. In this embodiment, a large number of experiments have verified that when the distance L2 between the main connection point 411 and the second connection point 413 is twice the distance L1 between the main connection point 411 and the first connection point 412, the effect is optimal, and if it is more than twice, the output force of the actuator will increase, causing the actuator 3 to have a large action pressure, which affects the service life of the actuator 3.

[0043] In some embodiments, as shown in Figure 1 and Figure 2 Since the actuator 3 drives the connecting arm 41 to swing by making a linear motion, the actuator 3 is rotationally connected to the connecting arm 41, and the connecting arm 41 is rotationally connected to the swing arm 2, so the main connection point 411 and the swing arm 2 are rotationally connected through the main ball pin 40, the first connection point 412 and the actuator 3 are rotationally connected through the first ball pin 411a, and the second connection point 413 and the knuckle 5 are rotationally connected through the second ball pin 411b.

[0044] Specifically, the connecting arm 41 is provided with a main ball pin mounting hole at the main connection point 411, the main ball pin 40 is rotationally arranged on the swing arm 2 and penetrates through the main ball pin mounting hole of the connecting arm 41, so that the connecting arm 41 is rotationally mounted on the swing arm 2 through the main ball pin 40. The connecting arm 41 is provided with a first ball pin mounting hole at the first connection point 412, the output end of the actuator 3 is provided with a first ball pin 411a, the first ball pin 411a penetrates through the first ball pin mounting hole, so that the first connection point 412 of the connecting arm 41 and the output end of the actuator 3 are rotationally connected. The connecting arm 41 is provided with a second ball pin mounting hole at the second connection point 413, the knuckle 5 is provided with a second ball pin 411b, the second ball pin 411b penetrates through the second ball pin mounting hole, so that the second connection point 413 of the connecting arm 41 and the knuckle 5 are rotationally connected. When the output end of the actuator 3 makes a linear motion, the connecting arm 41 rotates about the main connection point 411 as the center line, so that the first connection point 412 and the second connection point 413 both change in angle, thereby realizing the steering control of the wheels.

[0045] In some embodiments, as shown inFigure 1 and Figure 2 As shown in the above embodiments, the connecting arm 41 is connected with the actuator 3, in order to make the actuator 3 accurately control the connecting arm 41, the actuator 3 is arranged on the sub-frame 1 and corresponds to the connecting arm 41 which needs to be controlled, since the structure of the left and right steering link groups 4 is consistent, the actuator 3 is symmetrically arranged on the sub-frame 1, and the actuator 3 is arranged close to the connecting arm 41, which can ensure the stability of the vehicle. When the actuator 3 is arranged close to the connecting arm 41, the output end of the actuator 3 is shorter, so that the first steering link 42 can be connected with the connecting arm 41, so that the actuator 3 controls the connecting arm 41 to operate through the first steering link 42. The specific connection structure of the actuator 3, the first steering link 42 and the connecting arm 41 is that the steering link group 4 further comprises a first steering link 42, one end of the first steering link 42 is rotatably connected with the output end of the actuator 3, and the other end of the first steering link 42 is connected with the first connecting point 412 through the first ball pin 411a.

[0046] Specifically, the steering link group 4 further comprises a first steering link 42, the first steering link 42 is used for connecting the connecting arm 41 with the actuator 3, one end of the first steering link 42 is rotatably connected with the output end of the actuator 3, since the swing arm 2 swings relative to the sub-frame 1 when the vehicle runs on different high and low grounds during running, and the actuator 3 is fixed on the sub-frame 1, therefore, one end of the first steering link 42 needs to be rotatably connected with the output end of the actuator 3 (the rotatable connection structure can be similar to a universal joint, for example, a ball pin is arranged on the output end of the actuator 3, and the first steering link 42 is rotatably connected with the ball pin on the output end of the actuator, and the rotatable structure can also adopt the prior art, which will not be described in detail here), so as to adapt to the environment that the wheels run on different high and low grounds. The other end of the first steering link 42 is connected with the first connecting point 412 through the first ball pin 411a, that is, the first ball pin 411a is arranged on the first connecting point 412 of the connecting arm 41, and the first steering link 42 is rotatably connected with the connecting arm 41 through the first ball pin 411a, so that when the first steering link 42 moves in a transverse straight line, it can drive the rotation angle of the connecting arm 41, and further control the rotation angle of the wheels. For example, the mounting end of the first ball pin 411a faces the bottom of the connecting arm 41, so that the first steering link 42 is mounted at the bottom of the connecting arm 41, thereby saving the space above the frame 1, and more components can be mounted on the frame 1.

[0047] In some embodiments, as Figure 1 and Figure 2As shown, based on the above embodiment, the connecting arm 41 is connected with the steering knuckle 5 of the wheel, and in order to increase the steering angle of the steering knuckle 5, a second steering pull rod 43 is added between the connecting arm 41 and the steering knuckle 5. Specifically, the steering pull rod group 4 further comprises a second steering pull rod 43, one end of the second steering pull rod 43 is connected with the second connecting point 413 through the second ball pin 411b, and the other end of the second steering pull rod 43 is rotatably connected with the steering knuckle 5.

[0048] Specifically, the steering pull rod group 4 further comprises a second steering pull rod 43, the second steering pull rod 43 is used to connect the connecting arm 41 and the steering knuckle 5 of the wheel, one end of the second steering pull rod 43 is rotatably connected with the second connecting point 413 of the connecting arm 41, and the second ball pin 411b is arranged on the second connecting point 413. Therefore, the second steering pull rod 43 is connected with the second ball pin 411b, the mounting end of the second ball pin 411b faces the bottom of the connecting arm 41, so that the second steering pull rod 43 is mounted on the bottom wall of the connecting arm 41. In this way, the control on the upper part of the frame 1 is saved, and more components can be installed on the frame 1. The second steering pull rod 43 is connected between the connecting arm 41 and the steering knuckle 5 of the wheel, so that the distance between the connecting arm 41 and the steering knuckle 5 of the wheel is increased, and the wheel can be rotated by a larger angle.

[0049] In some embodiments, as shown in Figure 1 and Figure 2 Based on the above embodiment, in order to realize larger steering angle of the wheel, the length of the first steering pull rod 42 is less than or equal to the length of the second steering pull rod 43.

[0050] Specifically, in the present embodiment, since the distance L1 between the main connecting point 411 and the first connecting point 412 of the connecting arm 41 is less than the distance L2 between the main connecting point 411 and the second connecting point 413, the length of the first steering pull rod 42 is less than or equal to the length of the second steering pull rod 43. In this way, the rotation angle of the first connecting point 412 is twice the rotation angle of the second connecting point 413 or the rotation angles of both are larger, so that the rotation of the wheel by a larger angle can be controlled.

[0051] In some embodiments, as shown in Figure 1 and Figure 2 In order to enable the connecting arm 41 to stably rotate on the swing arm 2 and avoid friction between the connecting arm 41 and the swing arm 2, a support rod 44 is arranged on the swing arm 2, the main ball pin 40 is arranged on the support rod 44, and the connecting arm 41 is fixed on the main ball pin 40.

[0052] Specifically, the utility model discloses in the upper support rod 44 of swing arm 2 is set, and one end of support rod 44 is rotatably arranged on swing arm 2, and the other end is equipped with main ball pin 40, and connecting arm 41 is fixed on main ball pin 40, namely connecting arm 41 is installed on swing arm 2 through support rod 44, so that connecting arm 41 is equipped with support rod 44 between swing arm 2, increase the distance between connecting arm 41 and swing arm 2, avoid the friction of connecting arm 41 with swing arm 2 in the rotating process.In the embodiment, support rod 44 can be installed above swing arm 2 or below swing arm 2.

[0053] In some embodiments, as shown in Figure 1 and Figure 2 on the basis of the above-mentioned embodiment, in order to avoid the exposure of connecting arm 41 in the vehicle bottom, which can cause the problem of easy corrosion or damage of connecting arm 41, connecting arm 41 is arranged above the auxiliary frame 1.Specifically, the support rod 44 is arranged on the top of the swing arm 2, one end of the support rod 44 is rotatably connected with the swing arm 2, and the other end is provided with a main ball pin hole, the main ball pin 40 is arranged in the main ball pin hole, the fixed end of the main ball pin 40 faces the upper side of the support rod 44, and the fixed end of the main ball pin 40 penetrates the main connecting point 411 of the connecting arm 41 to be fixed, so that the connecting arm 41 is rotatably arranged above the support rod 44.

[0054] Specifically, the support rod 44 is arranged on the top of the swing arm 2, one end of the support rod 44 is provided with a ball pin hole, a ball pin is arranged in the ball pin hole, one end of the support rod 44 is rotatably connected with the swing arm 2 through the ball pin, the other end is provided with a main ball pin hole, the main ball pin 40 is arranged in the main ball pin hole, the fixed end of the main ball pin 40 faces the upper side of the support rod 44, and the fixed end of the main ball pin 40 penetrates the main connecting point 411 of the connecting arm 41 to be fixed, so that the connecting arm 41 is rotatably connected with the support rod 44, so that the connecting arm 41 can be rotatably installed above the support rod 44, so that the connecting arm 41 can be installed above the frame 1, avoiding the exposure of the connecting arm 41 in the vehicle bottom, which can cause the problem of easy corrosion or damage of the connecting arm 41.

[0055] In some embodiments, the shock absorber 6 is arranged above the universal joint of the vehicle wheel, and the shock absorber 6 is connected with the frame 1, which can realize the damping effect of the vehicle during driving.

[0056] The utility model discloses a vehicle, including the utility model discloses a kind of wheel steering system.

[0057] Specifically, the wheel steering system comprises a subframe 1, a swing arm 2, an actuator 3 and a steering linkage set 4, wherein the swing arm 2 is swingably arranged on the subframe 1 at one end and connected with a wheel at the other end, and the swing arm 2 can rotate relative to the subframe 1 when the wheel encounters uneven ground, so that the vehicle runs more stably. The actuator 3 controls the steering of the wheel by driving the steering linkage set 4 and is fixed on the subframe 1, and the steering linkage set 4 comprises a connecting arm 41, the connecting arm 41 comprises a first connecting point 412, a second connecting point 413 and a main connecting point 411 between the first connecting point 412 and the second connecting point 413, the main connecting point 411 is rotatably connected with the swing arm 2, that is, the connecting arm 41 is rotatably arranged on the swing arm 2 through the main connecting point 411, the first connecting point 412 is connected with the output end of the actuator 3, and the second connecting point 413 is rotatably connected with a steering knuckle 5 of the wheel, so that the actuator 3 can drive one end of the connecting arm 41 to move, and the connecting arm 41 rotates on the swing arm 2, thereby driving the wheel to steer through the other end. The distance L1 between the main connecting point 411 and the first connecting point 412 is smaller than the distance L2 between the main connecting point 411 and the second connecting point 413, and when the output end of the actuator 3 moves linearly, the first connecting point 412 of the connecting arm 41 is pushed, so that the connecting arm 41 rotates relative to the main connecting point 411, thereby driving the wheel connected with the second connecting point 413 to steer, and the rotation angle of the first connecting point 412 is greater than that of the second connecting point 413, so that the actuator 3 can control the wheel to rotate by a large angle through the short stroke rack of the connecting arm 41.

[0058] It should be noted that some embodiments of the present application have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order and still achieve desirable results. Additionally, the process depicted in the figures does not necessarily require the particular order shown, or sequential order, to achieve desirable results. In certain implementations, multitasking and parallel processing can be advantageous.

[0059] Those skilled in the art will understand that the above discussion of any of the embodiments is merely exemplary and is not intended to be limiting of the scope of the present application (including claims) to these examples. Any of the embodiments or technical features among different embodiments can be combined, and steps can be implemented in any order, under the concept of the present application, and there are many other changes of different aspects of the embodiments of the present application as described above. In order to be brief, they are not provided in detail.

[0060] While the present application has been described in connection with specific embodiments thereof, it will be understood that many modifications, substitutions, and changes will be apparent to those of ordinary skill in the art from the foregoing description. For example, other memory architectures can use the embodiments discussed.

[0061] Embodiments of the present application are intended to cover all such alternatives, modifications, and variations as falling within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications and variations should be included within the scope of the present application.

Claims

1. A wheel steering system, characterized by, The invention relates to a vehicle suspension system, comprising: a subframe (1); a swing arm (2) swingably arranged on the subframe (1), one end of the swing arm (2) being connected with a wheel; an actuator (3) fixed on the subframe (1); a steering linkage (4) comprising a connecting arm (41), the connecting arm (41) comprising a first connecting point (412), a second connecting point (413) and a main connecting point (411) between the first connecting point (412) and the second connecting point (413), the main connecting point (411) being rotatably connected with the swing arm (2), the first connecting point (412) being rotatably connected with an output end of the actuator (3), and the second connecting point (413) being rotatably connected with a steering knuckle (5) of the wheel; wherein a distance (L1) between the main connecting point (411) and the first connecting point (412) is less than a distance (L2) between the main connecting point (411) and the second connecting point (413).

2. The wheel steering system of claim 1, wherein The distance (L2) between the main connecting point (411) and the second connecting point (413) is twice the distance (L1) between the main connecting point (411) and the first connecting point (412).

3. The wheel steering system of claim 1, wherein, The main connecting point (411) is rotatably connected with the swing arm (2) through a main ball pin (40), the first connecting point (412) is rotatably connected with the actuator (3) through a first ball pin (411a), and the second connecting point (413) is rotatably connected with the steering knuckle (5) through a second ball pin (411b).

4. The wheel steering system of claim 3, wherein The steering linkage (4) further comprises a first steering linkage (42), one end of the first steering linkage (42) being rotatably connected with the output end of the actuator (3), and the other end of the first steering linkage (42) being connected with the first connecting point (412) through the first ball pin (411a).

5. The wheel steering system of claim 4, wherein, The steering linkage (4) further comprises a second steering linkage (43), one end of the second steering linkage (43) being connected with the second connecting point (413) through the second ball pin (411b), and the other end of the second steering linkage (43) being rotatably connected with the steering knuckle (5).

6. The wheel steering system of claim 5, wherein, The length of the first steering linkage (42) is less than or equal to the length of the second steering linkage (43).

7. The wheel steering system of claim 3, wherein A support rod (44) is arranged on the swing arm (2), and the main ball pin (40) is arranged on the support rod (44).

8. The wheel steering system of claim 7, wherein, The support rod (44) is arranged on the top of the swing arm (2), one end of the support rod (44) being rotatably connected with the swing arm (2), and the other end of the support rod (44) being provided with a main ball pin hole, the main ball pin (40) being arranged in the main ball pin hole, a fixed end of the main ball pin (40) facing upward of the support rod (44), and the main ball pin (40) penetrating through the connecting arm (41) to rotatably arrange the connecting arm (41) above the support rod (44).

9. The wheel steering system of claim 1, wherein, The wheel, the actuator (3) and the steering linkage group (4) are one-to-one correspondence, so that the actuator (3) controls the wheel steering through the steering linkage group (4).

10. A vehicle characterized by comprising: A wheel steering system comprising any one of claims 1-9.

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