Steering system and vehicle

Abstract

The utility model relates to a steering system and a vehicle, the steering system is connected between a frame and a wheel, and the steering system comprises: a first connecting rod, one end of which is rotatably connected to the wheel through a knuckle and the other end of which extends towards the frame; one end of the second connecting rod is rotationally connected with the first connecting rod, and the other end is rotationally connected with the frame; the push rod is rotationally connected to the middle section of the second connecting rod and stretches in the axial direction of the wheel to drive the second connecting rod to swing relative to the frame, and the second connecting rod pulls the first connecting rod to push the wheel to deflect relative to the frame. The first connecting rod and the second connecting rod are arranged to be matched together, the movable freedom degree between the push rod and the steering knuckle is increased, the first connecting rod and the second connecting rod can amplify the telescopic stroke of the push rod, the steering knuckle can rotate by a larger angle, the wheel can deflect by a larger angle relative to the frame, the turning radius is reduced, and the steering efficiency is improved. And the turning performance is improved.

Description

Technical Field

[0001] The present application relates to the field of steering technology, and in particular to a steering system and a vehicle. Background Art

[0002] The steering system is an important component of the vehicle chassis. It is connected between the vehicle frame and the wheels and can control the direction of the vehicle according to the driver's wishes. The steering system plays a very important role in driving safety and driving controllability.

[0003] In the prior art, the steering knuckle and the steering push rod in the steering system are directly connected, and the steering push rod constrains the movement of the steering knuckle, so that the vehicle can usually only achieve a deflection of 30° to 40°, and cannot achieve a deflection of a larger angle, resulting in relatively low turning performance of the vehicle, which is not conducive to the vehicle turning around or turning under conditions with small operating space such as congested roads, limiting the application of the vehicle. Utility Model Content

[0004] In order to solve the above problems, the present application provides a steering system and a vehicle equipped with the steering system, which can achieve a greater angle of deflection by optimizing the transmission mechanism between the steering knuckle and the push rod in the steering system and reducing the constraints between the push rod and the steering knuckle, thereby improving the turning performance of the vehicle and making the vehicle steering more convenient and efficient. The specific solutions include the following:

[0005] In a first aspect, the present application provides a steering system connected between a vehicle frame and a wheel, comprising:

[0006] A first connecting rod, one end of which is rotatably connected to the wheel through a steering knuckle and the other end of which extends toward the vehicle frame;

[0007] A second connecting rod, one end of which is rotatably connected to the first connecting rod, and the other end of which is rotatably connected to the frame;

[0008] The push rod is rotatably connected to the middle section of the second connecting rod and is extended and retracted along the axial direction of the wheel to drive the second connecting rod to swing relative to the frame. The second connecting rod pulls the first connecting rod to push the wheel to deflect relative to the frame.

[0009] The steering system of the present application sets a first connecting rod and a second connecting rod as a transmission mechanism between the steering knuckle and the push rod, so that the steering knuckle and the push rod can achieve a fixed connection effect and can ensure that the steering knuckle rotates relative to the push rod. Specifically, the present application sets a first connecting rod between the frame and the wheel, and one end of the first connecting rod is rotationally connected to the steering knuckle on the wheel, and the other end is rotationally connected to the second connecting rod rotationally connected to the frame, so as to ensure that the first connecting rod and the second connecting rod can connect and fix the wheel and the frame, and can also increase the freedom of movement of the wheel relative to the frame. Furthermore, the present application also sets a push rod as a driving rod, and the push rod is rotationally connected to the middle section of the second connecting rod. When the push rod is extended toward the wheel, it can drive the second connecting rod to swing and pull the first connecting rod to push the wheel to deflect relative to the frame to achieve steering.

[0010] It can be understood that the present application increases the freedom of movement between the push rod and the steering knuckle by setting the first connecting rod and the second connecting rod to cooperate with each other, and the first connecting rod and the second connecting rod can amplify the telescopic stroke of the push rod, so that the steering knuckle can rotate at a larger angle, that is, the wheel can be deflected at a larger angle relative to the frame, thereby reducing the turning radius and improving the turning performance.

[0011] In one embodiment, the first link includes a first end and a second end, the first end is connected to the steering knuckle, the second end extends toward the frame, and the distance between the first end and the rotation axis of the wheel is greater than the distance between the second end and the rotation axis of the wheel.

[0012] In this embodiment, the distance between the first end of the first connecting rod and the rotation axis of the wheel is set to be greater than the distance between the second end of the first connecting rod and the rotation axis of the wheel to limit the extension direction of the first connecting rod, that is, the first connecting rod is limited to extend toward the frame and also toward the rotation axis of the wheel, thereby ensuring that when the push rod is extended and retracted along the axial direction of the vehicle, the second connecting rod and the first connecting rod can amplify the movement stroke of the push rod, so as to achieve a larger angle of deflection of the wheel relative to the frame under short-stroke movement of the push rod.

[0013] In one embodiment, the distance from the connection end of the second connecting rod and the frame to the rotation axis is greater than the distance from the first end to the rotation axis.

[0014] In this embodiment, the distance from the connection end of the second connecting rod and the frame to the rotation axis is set to be greater than the distance from the first end to the rotation axis, so as to limit the extension direction of the second connecting rod, that is, the second connecting rod is limited to extend toward the frame and at the same time extend in the direction away from the rotation axis of the wheel. The extension directions of the first connecting rod and the second connecting rod are opposite, so that while ensuring that the first connecting rod and the second connecting rod can be connected to fix the steering knuckle and the push rod, the telescopic stroke of the push rod can be further enlarged, so that the push rod can achieve a larger angle of deflection of the wheel with a shorter telescopic stroke.

[0015] In one embodiment, the distance between the push rod and the rotation axis is greater than the radius of the wheel.

[0016] In this embodiment, by setting the distance between the push rod and the rotating shaft to be greater than the radius of the wheel, so as to set the turning inner point of the push rod away from the wheel center, on the one hand, it is possible to avoid motion interference between the push rod and the wheel, ensure that the wheel can deflect significantly, and increase the design freedom of the push rod; on the other hand, it is possible to optimize the spatial layout and increase the layout space of other functional components in the steering system of the present application, for example, it is possible to increase the layout space of the drive assembly connected to the rotating shaft, which is beneficial to increase the power of the drive assembly and improve the dynamic performance of the vehicle.

[0017] In one embodiment, the connection end of the push rod and the second connecting rod is closer to the connection end of the second connecting rod and the frame than the connection end of the second connecting rod and the first connecting rod.

[0018] In this embodiment, the connecting end of the push rod and the second connecting rod is arranged closer to the connecting end of the second connecting rod and the frame than the connecting end of the second connecting rod and the first connecting rod, that is, the push rod is arranged closer to the connecting end of the second connecting rod and the frame than the second end along the radial direction of the rotating shaft, so as to further shorten the telescopic stroke of the push rod while ensuring that the wheel has a larger deflection angle.

[0019] In one embodiment, the angle between the push rod and the second connecting rod is between 30° and 120°.

[0020] In this embodiment, the angle between the push rod and the second connecting rod affects the transmission of force and torque of the push rod. By adjusting the angle between the push rod and the second connecting rod to be between 30° and 120°, it is ensured that the push rod can easily push the wheel to deflect relative to the frame through the first connecting rod and the second connecting rod while also having a shorter telescopic stroke.

[0021] In one embodiment, the first link is hinged to the steering knuckle and the second link;

[0022] In one embodiment, the second link is hinged to the push rod and the frame.

[0023] In one embodiment, the second connecting rod includes a plurality of fixing portions, the plurality of fixing portions are arranged at intervals along the length direction of the second connecting rod, and the push rod can be detachably fixed to any fixing portion.

[0024] In this embodiment, by providing a plurality of spaced apart fixing portions along the length direction of the second connecting rod, and making the push rod detachable and fixed to any fixing portion, the steering system can be switched between relatively labor-saving and relatively shortened stroke by changing the position of the push rod relative to the second connecting rod, so that the steering system of the present application is suitable for different application scenarios, thereby improving the compatibility of the steering system of the present application.

[0025] In one embodiment, the steering system includes a steering gear, which is fixed to the vehicle frame and connected to the push rod, and is used to drive the push rod to extend and retract along the axial direction of the wheel.

[0026] In this embodiment, a steering gear is provided in the steering system to provide driving force to the push rod, thereby providing steering force to the wheels.

[0027] In one embodiment, the steering gear includes a gear and a rack, one end of the rack is fixedly connected to an end of the push rod away from the second connecting rod, and the gear is meshed with the rack and is used to drive the rack to move to push the push rod to extend and retract.

[0028] In this embodiment, based on the simple and compact structure of the gear and rack, as well as the small mass, high transmission efficiency and small vibration, a gear is set to drive the rack to move to push or pull the push rod to extend and retract, which can improve the smoothness of steering, make the steering process smoother, reduce costs, reduce noise, etc.

[0029] In one embodiment, the steering knuckle includes a bearing and a support arm fixed to the outer peripheral surface of the bearing, the bearing is sleeved around the outer periphery of the rotating shaft of the wheel and is rotatably connected to the rotating shaft, and the support arm is rotatably connected to the first connecting rod.

[0030] In this embodiment, the bearing and the support arm are provided to ensure that the steering knuckle can achieve the deflection of the wheel under the drive of the first connecting rod and ensure that the wheel can run normally.

[0031] In a second aspect, the present application provides a vehicle, the vehicle comprising wheels, a frame and a steering system as in any of the above embodiments, wherein the steering system is connected between the wheels and the frame and is used to drive the wheels to deflect relative to the frame.

[0032] It can be understood that the vehicle provided in the second aspect of the present application, because it adopts the steering system provided in the first aspect of the present application, also has all possible beneficial effects in any embodiment provided in the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of a portion of the structure of a vehicle provided in one embodiment of the present application;

[0035] Figure 2A schematic diagram of the structure of a steering system provided in one embodiment of the present application;

[0036] Figure 3 A structural schematic diagram of a steering system provided in one embodiment of the present application;

[0037] Figure 4 Provided in one embodiment of the present application Figure 3 The enlarged view of point A in the middle;

[0038] Figure 5 In another embodiment of the present application, Figure 3 Enlarged view of point A in the middle.

[0039] Figure numbers: 200-vehicle; 210-frame; 211-subframe; 212-suspension; 2121-shock absorber; 2122-swing arm; 220-wheel; 230-anti-collision beam; 240-energy absorption box; 100-steering system; 10-first connecting rod; 11-first end; 12-second end; 13-first fixed ball joint; 20-second connecting rod; 21-second fixed ball joint; 22-third fixed ball joint; 23-fourth fixed ball joint; 30-push rod; 40-steering knuckle; 41-bearing; 42-support arm; 50-steering gear; 51-gear; 52-rack; 60-steering wheel; 70-steering shaft. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0041] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including", "may include", "include", or "may include" used in this application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "including" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0044] Please refer to Figure 1 , Figure 1 A schematic diagram of a portion of the structure of a vehicle 200 provided in one embodiment of the present application.

[0045] like Figure 1 As shown, in one embodiment, the vehicle 200 provided by the present application includes a steering system 100, a frame 210 and a wheel 220. Specifically, the steering system 100 is connected between the wheel 220 and the frame 210, and is used to transmit force and torque. The steering system 100 can be used to drive the wheel 220 to deflect relative to the frame 210 according to the driver's intention, and turn in a preset direction to control the driving direction of the vehicle 200. Among them, the vehicle 200 can be a pure electric vehicle 200, a hybrid vehicle 200 or a fuel vehicle 200, etc.

[0046] It should be noted that the steering system 100 of the present application includes but is not limited to being applied to a vehicle 200. However, for the sake of ease of introduction, the following embodiments of the present application are described by taking the application to the vehicle 200 as an example.

[0047] Please refer to Figures 2 to 4 ,in Figure 2A schematic diagram of the structure of a steering system 100 provided in one embodiment of the present application; Figure 3 A structural schematic diagram of a steering system 100 provided in one embodiment of the present application; Figure 4 Provided in one embodiment of the present application Figure 3 Enlarged view of point A in the middle.

[0048] like Figures 1 to 4 As shown, in one embodiment, the present application provides a steering system 100, which is connected between a frame 210 and a wheel 220. The steering system 100 of the present application includes a first link 10, a second link 20 and a push rod 30. One end of the first link 10 is rotatably connected to the wheel 220 through a steering knuckle 40, and the other end extends toward the frame 210. That is, the first link 10 is fixed to the steering knuckle 40, and has a rotational freedom relative to the wheel hub of the wheel 220 and the frame 210. When the wheel hub of the wheel 220 of the vehicle 200 of the present application rotates relative to the ground, the first link 10 will not rotate with the wheel hub of the wheel 220. One end of the second link 20 is rotatably connected to one end of the first link 10 close to the frame 210, and the other end is rotatably connected to the frame 210. That is, the second link 20 is connected between the first link 10 and the frame 210, and has a rotational freedom relative to the first link 10 and the frame 210.

[0049] The push rod 30 extends along the length direction of the rotation axis of the wheel 220, and the push rod 30 is rotatably connected to the middle section of the second connecting rod 20 (i.e., the part other than the two ends of the second connecting rod 20). Further, the steering system 100 of the present application also includes a steering gear 50, which is fixed to the frame 210 and fixedly connected to the push rod 30. The steering gear 50, as a power source of steering force, provides the push rod 30 with power to extend and retract along the axial direction of the wheel 220 toward the wheel 220. When the vehicle 200 needs to turn, the steering gear 50 works and drives the push rod 30 to extend and retract along the axial direction of the wheel 220 toward the wheel 220, so as to drive the second connecting rod 20 to swing relative to the frame 210, and the second connecting rod 20 swings and pulls the first connecting rod 10 to push the wheel 220 to deflect relative to the frame 210, so as to achieve turning.

[0050] The push rod of the steering system in the prior art is directly connected to the steering knuckle of the wheel. Since the push rod is constrained by the steering knuckle, the push rod can usually only drive the steering knuckle to drive the wheel to deflect about 30 to 40 degrees relative to the frame within a limited telescopic stroke range, resulting in a relatively large turning radius of the vehicle.

[0051] The steering system 100 of the present application sets the first connecting rod 10 and the second connecting rod 20 as the transmission mechanism between the push rod 30 and the steering knuckle 40, so as to ensure that the wheel 220 and the frame 210 can be connected and fixed by the first connecting rod 10 and the second connecting rod 20, and the degree of freedom of movement of the steering knuckle 40 relative to the push rod 30 can be increased, that is, the degree of freedom of movement of the wheel 220 relative to the frame 210 is increased, and the constraint between the push rod 30 and the steering knuckle 40 is reduced, so that the wheel 220 can have a larger deflection angle relative to the frame 210. That is, the push rod 30 can drive the steering knuckle 40 to drive the wheel 220 to achieve a larger angle of deflection relative to the frame 210 within the same telescopic stroke range, reduce the turning radius of the vehicle 200, improve the turning performance of the vehicle 200, make the steering of the vehicle 200 more efficient and convenient, and help the vehicle 200 to achieve turning or U-turn under conditions of small operating space such as congested roads, thereby improving the driving experience. It should be noted that, by using the steering system 100 provided in the present application, the wheel 220 can achieve an angular deflection of up to about eighty degrees relative to the frame 210 .

[0052] exist Figure 2 In the illustrated embodiment, the steering system 100 of the present application further includes a steering wheel 60 and a steering shaft 70, wherein the steering wheel 60 is fixedly connected to the steering shaft 70, and the steering wheel 60 serves as an input mechanism for the driver's steering operation. The steering gear 50 includes a gear 51 and a rack 52, wherein the gear 51 and the rack 52 are meshed with each other, wherein the extension direction of the rack 52 is in the same direction as the length direction of the rotating shaft of the wheel 220, and the opposite ends of the rack 52 are respectively connected to an end of a push rod 30 away from the first connecting rod 10. The steering shaft 70 is in transmission connection with the gear 51, and provides driving force to the gear 51, and the rack 52, driven by the gear 51, pushes the push rod 30 to extend and retract to push or pull the second connecting rod 20.

[0053] It can be understood that based on the simple and compact structure of the gear 51 and the rack 52, as well as the small mass, high transmission efficiency and small vibration, setting the gear 51 to drive the rack 52 to move to push or pull the push rod 30 to extend and retract can improve the steering stability, make the steering process smoother, reduce costs, reduce noise, etc.

[0054] In one embodiment, the first link 10 is hinged with the steering knuckle 40 and the second link 20, and the second link 20 is hinged with the push rod 30 and the frame 210. That is, the first link 10 can be rotatably connected with the steering knuckle 40 through the first fixed ball joint 13, and rotatably connected with the second link 20 through the second fixed ball joint 21, the second link 20 is rotatably connected with the push rod 30 through the third fixed ball joint 22, and the second link 20 is rotatably connected with the frame 210 through the fourth fixed ball joint 23. The fourth fixed ball joint 23 serves as a fulcrum. When the vehicle 200 needs to turn, the push rod 30 is driven by the steering gear 50 to extend and retract along the axial direction of the rotating shaft, and the second link 20 is driven by the push rod 30 to rotate around the fulcrum of the fourth fixed ball joint 23, so that the second link 20 swings relative to the frame 210 and pulls the first link 10 to move, so that the steering knuckle 40 rotates around the kingpin line, thereby realizing the steering function.

[0055] It should be noted that in some other embodiments, the rotational connection between the first connecting rod 10 and the steering knuckle 40 and the second connecting rod 20, and between the second connecting rod 20 and the push rod 30 and the steering knuckle 40 is not necessarily achieved by means of a fixed ball joint, but can also be achieved by means of a structure in the form of a bushing, etc., and the present application does not make any special limitation on this.

[0056] In one embodiment, the first connecting rod 10 includes a first end 11 and a second end 12 along its length direction. The first end 11 is connected to the steering knuckle 40, the second end 12 extends toward the frame 210, and the second end 12 is connected to the second connecting rod 20. Further, the distance between the first end 11 and the rotation axis of the wheel 220 is greater than the distance between the second end 12 and the rotation axis of the wheel 220. That is, after the first connecting rod 10 is connected to the steering knuckle 40 and extends toward the frame 210, it also extends in the radial direction of the rotation axis of the wheel 220 toward the direction close to the rotation axis.

[0057] It can be understood that in this embodiment, based on the fact that the push rod 30 is arranged on the side of the wheel 220 close to the frame 210 and extends along the length direction of the rotation axis of the wheel 220, by limiting the extension direction of the first connecting rod 10, when the push rod 30 is extended and retracted along the axial direction of the wheel 220 toward the wheel 220, the force transmitted to the first connecting rod 10 along the axial direction of the wheel 220 is larger, which can make the wheel 220 more easily deflected relative to the frame 210. That is, by arranging the first connecting rod 10 to extend toward the rotation axis of the wheel 220, the first connecting rod 10 and the second connecting rod 20 can cooperate to amplify the telescopic stroke of the push rod 30, so that the push rod 30 can achieve a larger angle range of deflection of the wheel 220 relative to the frame 210 within a shorter telescopic stroke range.

[0058] In one embodiment, the distance from the connection end of the second connecting rod 20 and the frame 210 to the rotation axis is greater than the distance from the first end 11 to the rotation axis. That is, after the second connecting rod 20 is connected to the first connecting rod 10, it extends toward the frame 210 and also extends in the radial direction of the rotation axis of the wheel 220 away from the rotation axis.

[0059] It can be understood that in this embodiment, based on the fact that the first link 10 extends toward the frame 210 and also extends in the radial direction of the rotation axis toward the direction close to the rotation axis, the second link 20 is restricted from extending toward the frame 210 and also extending in the radial direction of the rotation axis toward the direction away from the rotation axis, that is, the extension direction of the second link 20 is set opposite to the extension direction of the first link 10. On the one hand, the second link 20 extends toward the frame 210, which can further shorten the telescopic stroke of the push rod 30. That is, the push rod 30 can make the wheel 220 deflect by the same angle relative to the frame 210 with a shorter telescopic stroke. On the other hand, the second link 20 extends in the radial direction of the rotation axis toward the direction away from the rotation axis, which can make the push rod 30 relatively far away from the wheel center of the wheel 220 along the radial direction of the rotation axis, thereby extending the steering arm and facilitating the push rod 30 to drive the wheel 220 to deflect.

[0060] In one embodiment, along the radial direction of the steering shaft 70, the extension length of the second connecting rod 20 is greater than the extension length of the first connecting rod 10, and the distance between the push rod 30 and the rotating shaft is greater than the radius of the wheel 220. It can be understood that in this embodiment, by setting the distance between the push rod 30 and the rotating shaft greater than the radius of the wheel 220, the turning inner point of the push rod 30 is set outside the rim of the wheel 220. On the one hand, it can avoid the motion interference between the push rod 30 and the wheel 220, ensure that the wheel 220 can deflect significantly, and increase the design freedom of the push rod 30; on the other hand, it can optimize the spatial layout and increase the layout space of other functional components in the steering system 100 of the present application, for example, it can increase the layout space of the drive assembly connected to the rotating shaft, so as to increase the power of the drive assembly and improve the power performance of the vehicle 200.

[0061] In one embodiment, the connection end of the push rod 30 and the second connecting rod 20 is closer to the connection end of the second connecting rod 20 and the frame 210 than the connection end of the second connecting rod 20 and the first connecting rod 10. That is, the third fixed ball joint 22 is closer to the fourth fixed ball joint 23 than the second fixed ball joint 21. It can be understood that in this embodiment, by setting the push rod 30 closer to the connection end of the second connecting rod 20 and the frame 210 relative to the second end 12 along the radial direction of the rotation axis, the telescopic stroke of the push rod 30 can be further shortened while ensuring that the wheel 220 has a larger deflection angle.

[0062] It should be noted that the position of the push rod 30 relative to the second connecting rod 20 in the above embodiment is only used as an exemplary introduction and does not represent the position of the push rod 30 relative to the second connecting rod 20 in other embodiments of the present application. For example, in another embodiment, the distance between the connection end of the push rod 30 and the second connecting rod 20 to the connection end of the second connecting rod 20 and the frame 210 is equal to the distance between the connection end of the second connecting rod 20 and the first connecting rod 10. That is, the distance between the third fixed ball joint 22 and the second fixed ball joint 21 and the fourth fixed ball joint 23 is equal. In this embodiment, based on the connection end of the second connecting rod 20 and the frame 210 as a fixed fulcrum, the closer the push rod 30 is to the fixed bracket, the more difficult it is to push the wheel 220 to deflect. By setting the connection end of the push rod 30 and the second connecting rod 20 at the midpoint of the second connecting rod 20, the present application can shorten the telescopic stroke of the push rod 30 while ensuring that the push rod 30 is relatively labor-saving.

[0063] In one embodiment, the second connecting rod 20 includes a plurality of fixing parts (not shown in the figure), the plurality of fixing parts are arranged at intervals along the length direction of the second connecting rod 20, and the push rod 30 can be detachably fixed to any fixing part. It can be understood that in this embodiment, by providing a plurality of fixing parts arranged at intervals along the length direction of the second connecting rod 20, and making the push rod 30 detachably fixed to any fixing part, the steering system 100 can be switched between relatively labor-saving and relatively shortened stroke by changing the position of the push rod 30 relative to the second connecting rod 20, so that the steering system 100 of the present application is suitable for different application scenarios, and the compatibility of the steering system 100 of the present application is improved.

[0064] In one embodiment, the angle between the push rod 30 and the second connecting rod 20 is between 30° and 120°. It can be understood that the angle between the push rod 30 and the second connecting rod 20 affects the transmission of force and torque of the push rod 30. By adjusting the angle between the push rod 30 and the second connecting rod 20 to be between 30° and 120°, it is ensured that the push rod 30 can easily push the wheel 220 to deflect relative to the frame 210 through the first connecting rod 10 and the second connecting rod 20, while also having a shorter telescopic stroke.

[0065] In one embodiment, the steering knuckle 40 includes a bearing 41 and a support arm 42 fixed to the outer circumference of the bearing 41, the bearing 41 is sleeved on the outer periphery of the rotating shaft of the wheel 220 and is rotatably connected to the rotating shaft, and the support arm 42 is rotatably connected to the first connecting rod 10. It can be understood that by providing the bearing 41 and the support arm 42, it is ensured that the steering knuckle 40 can achieve the deflection of the wheel 220 under the drive of the first connecting rod 10, and ensure that the wheel 220 can travel normally.

[0066] Please see Figure 5 , Figure 5 In another embodiment of the present application, Figure 3 Enlarged view of point A in the middle.

[0067] Please refer to Figure 1 and Figure 5 The vehicle frame 210 of the present application includes a subframe 211 and a suspension 212. The suspension 212 is connected between the subframe 211 and the wheel 220 and is used to transmit force and torque. Specifically, the suspension 212 includes a shock absorber 2121 and a swing arm 2122. The shock absorber 2121 connects the wheel 220 and the vehicle body in the vertical direction, and the swing arm 2122 connects the wheel 220 and the subframe 211 in the horizontal direction. Under the joint action of the shock absorber 2121 and the swing arm 2122, the suspension 212 can adjust the relative height between the vehicle body and the wheel 220 to change the ground clearance of the vehicle body. That is, the suspension 212 can adjust the height of the vehicle 200 so that the vehicle 200 can be suitable for different working conditions, buffer the impact of the road on the vehicle 200, thereby improving the stability and comfort of the vehicle 200. For example, when the vehicle 200 is in a high-speed driving state, the suspension 212 can reduce the relative distance between the body and the wheel 220 to reduce wind resistance and improve the driving stability of the vehicle 200; when the vehicle 200 is driving on a low road surface, the suspension 212 can increase the relative distance between the body and the wheel 220 to improve the passability of the vehicle 200.

[0068] exist Figure 5 In the illustrated embodiment, the second connecting rod 20 rotatably connected to the frame 210 may be the second connecting rod 20 rotatably connected to the sub-frame 211. That is, the fourth fixed ball joint 23 is provided on the sub-frame 211. Since the sub-frame 211 has high strength and high load-bearing capacity, and the sub-frame 211 covers a relatively wide area, the second connecting rod 20 is rotatably connected to the sub-frame 211 to improve the flexibility and reliability of the design. It should be noted that the relative position of the second connecting rod 20 and the frame 210 in the above embodiment is only used as an exemplary introduction, and does not represent the relative position of the second connecting rod 20 and the frame 210 in other embodiments of the present application. For example, Figure 3 In the illustrated embodiment, the second link 20 is rotatably connected to the vehicle frame 210, which can be the second link 20 being rotatably connected to the swing arm 2122 of the suspension 212. During the operation of the vehicle 200, in order to alleviate the impact of the ground, the suspension 212 will jump up and down. In this embodiment, the second link 20 is rotatably connected to the swing arm 2122, so that the second link 20 jumps with the jumping of the swing arm 2122, thereby reducing the damage caused to the second link 20 and improving the reliability of the second link 20.

[0069] It should be noted that the second link 20 rotatably connected to the frame 210 includes but is not limited to the second link 20 rotatably connected to the subframe 211 and the swing arm 2122, and can also be other parts such as the vehicle body that have no lateral displacement relative to the wheel center of the wheel 220. At the same time, the steering system 100 of the present application can be applied to the front wheels and / or rear wheels of the vehicle 200.

[0070] In one embodiment, the vehicle 200 of the present application includes an energy absorption box 240 and an anti-collision beam 230. The anti-collision beam 230 is located at the front end of the subframe 211. The energy absorption box 240 is connected between the subframe 211 and the anti-collision beam 230. The anti-collision beam 230 can improve the strength of the vehicle body and reduce the damage to the vehicle body caused by a collision of the vehicle 200. The energy absorption box 240 is used to absorb part of the energy of the vehicle 200 during a collision.

[0071] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0073] It should be understood that the application of this application is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of this application still fall within the scope covered by this application.

Claims

1. A steering system connected between a vehicle frame and wheels, characterized in that: include: A first connecting rod, one end of which is rotatably connected to the wheel through a steering knuckle, and the other end of which extends toward the vehicle frame; A second connecting rod, one end of which is rotatably connected to the first connecting rod, and the other end of which is rotatably connected to the frame; The push rod is rotatably connected to the middle section of the second connecting rod and is extended and retracted along the axial direction of the wheel to drive the second connecting rod to swing relative to the frame. The second connecting rod pulls the first connecting rod to push the wheel to deflect relative to the frame.

2. The steering system according to claim 1, characterized in that: The first connecting rod includes a first end and a second end, the first end is connected to the steering knuckle, the second end extends toward the frame, and the distance between the first end and the rotation axis of the wheel is greater than the distance between the second end and the rotation axis of the wheel.

3. The steering system according to claim 2, characterized in that: The distance from the connecting end of the second connecting rod and the frame to the rotating axis is greater than the distance from the first end to the rotating axis.

4. The steering system according to claim 3, characterized in that: The distance between the push rod and the rotation axis is greater than the radius of the wheel.

5. The steering system according to claim 3, characterized in that: The connection end of the push rod and the second connecting rod is closer to the connection end of the second connecting rod and the frame than the connection end of the second connecting rod and the first connecting rod.

6. The steering system according to claim 3, characterized in that: The included angle between the push rod and the second connecting rod is in the range of 30° to 120°.

7. The steering system according to any one of claims 1 to 6, characterized in that: The first link is hinged to the steering knuckle and the second link; and / or, The second connecting rod is hinged to the push rod and the frame.

8. The steering system according to any one of claims 1 to 6, characterized in that: The second connecting rod comprises a plurality of fixing parts, and the plurality of fixing parts are arranged at intervals along the length direction of the second connecting rod, and the push rod can be detachably fixed to any of the fixing parts.

9. The steering system according to any one of claims 1 to 6, characterized in that: The steering system comprises a steering gear, which is fixed to the vehicle frame and connected to the push rod, and is used for driving the push rod to extend and retract along the axial direction of the wheel.

10. The steering system according to claim 9, characterized in that: The steering gear includes a gear and a rack, one end of the rack is fixedly connected to an end of the push rod away from the second connecting rod, and the gear is meshed with the rack and is used to drive the rack to move so as to push the push rod to extend and retract.

11. The steering system according to any one of claims 1 to 6, characterized in that: The steering knuckle includes a bearing and a support arm fixed to the outer peripheral surface of the bearing. The bearing is sleeved on the periphery of the rotating shaft of the wheel and is rotatably connected to the rotating shaft. The support arm is rotatably connected to the first connecting rod.

12. A vehicle, characterized in that: The vehicle comprises a wheel, a frame and a steering system as claimed in any one of claims 1 to 11, wherein the steering system is connected between the wheel and the frame and is used for driving the wheel to deflect relative to the frame.

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