Asymmetric steering rod system

Abstract

The utility model relates to the technical field of vehicle steering transmission, in particular to an asymmetric steering rod system which comprises a steering gear, a rocker arm, a longitudinal pull rod, a left steering unit, a right steering unit and a swing arm assembly, the upper end of the rocker arm is connected with the output end of the steering gear through a ball head, and the lower end of the rocker arm is connected with the longitudinal pull rod through a ball head; the left steering unit comprises a left steering knuckle arm and a left steering tie rod, one end of the left steering tie rod is connected with the swing arm assembly, and the other end of the left steering tie rod is connected with the left steering knuckle arm. The right steering unit comprises a right steering knuckle arm and a right steering tie rod, one end of the right steering tie rod is connected with the swing arm assembly, and the other end of the right steering tie rod is connected with the right steering knuckle arm. The length of the left steering knuckle arm is not equal to that of the right steering knuckle arm, and the length of the left steering tie rod is not equal to that of the right steering tie rod. Stable operation of a vehicle can be achieved only through one swing arm assembly, the number of used parts is small, cost is low, and occupied transverse space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle steering transmission, in particular to an asymmetric steering rod system. Background Art

[0002] The steering system is an important component of the vehicle. Its function is to transmit the torque output by the steering gear to the steering wheels to achieve vehicle steering and change the deflection angles of the two steering wheels according to a certain relationship to ensure that the relative slip between the wheels and the ground is as small as possible when the vehicle is turning. Therefore, the steering system directly affects the stability of vehicle handling, the safety of operation and the service life of the tires.

[0003] Existing steering linkage structures, such as the vertical steering transmission and independent suspension system disclosed in the Chinese invention patent application document with application publication number CN117565972A, include a vertical steering transmission mounted on the subframe to drive the steering of the left and right wheels. The vertical steering transmission includes a vertical steering gear, a steering drop arm, a steering longitudinal tie rod, a left rocker arm unit, and a right rocker arm unit. The left rocker arm unit and the right rocker arm unit are symmetrically arranged, each including a rocker arm, a maintenance module, and a steering side tie rod. The rockers of the two rocker arm units are connected by a steering intermediate tie rod. The steering gear of the aforementioned vertical steering transmission is vertically arranged and mounted on a vehicle with independent suspension. However, when using left-right symmetrical left and right rocker arm units, the number of components used is high, the cost of the components is high, and the problem of occupying a large amount of lateral space in the vehicle is still caused. Utility Model Content

[0004] The purpose of the utility model is to provide an asymmetric steering linkage system to solve the technical problems of the symmetric steering linkage system in the prior art, such as high component cost and large lateral space occupation.

[0005] To solve the above problems, the present invention provides an asymmetric steering linkage system adopting the following technical solutions:

[0006] An asymmetric steering linkage system includes a steering gear, a rocker arm, a trailing rod, a left steering unit, and a right steering unit. The upper end of the rocker arm is connected to the output end of the steering gear via a ball joint, and the lower end of the rocker arm is connected to the trailing rod via a ball joint. It also includes a swing arm assembly for rotationally mounting on the vehicle chassis.

[0007] The left steering unit includes a left steering knuckle arm and a left steering tie rod, one end of the left steering tie rod is connected to the swing arm assembly through a ball joint, and the other end is connected to the left steering knuckle arm through a ball joint, and the other end of the left steering knuckle arm is used to connect to the left wheel side; the right steering unit includes a right steering knuckle arm and a right steering tie rod, one end of the right steering tie rod is connected to the swing arm assembly through a ball joint, and the other end is connected to the right steering knuckle arm through a ball joint, and the other end of the right steering knuckle arm is used to connect to the right wheel side; the end of the trailing rod away from the rocker arm is connected to the swing arm assembly through a ball joint;

[0008] The length of the left steering knuckle arm is not equal to the length of the right steering knuckle arm, and the length of the left steering tie rod is not equal to the length of the right steering tie rod.

[0009] Furthermore, the swing arm assembly includes a swing arm, a swing arm spindle, and an angular contact ball bearing connected between the swing arm and the swing arm spindle; the swing arm is provided with connecting holes corresponding to the left steering tie rod, the right steering tie rod and the longitudinal tie rod, respectively, and is also provided with a mounting hole for installing the swing arm spindle, and a limit assembly for limiting the axial displacement of the angular contact ball bearing is provided in the mounting hole.

[0010] Furthermore, the limiting assembly includes an elastic retaining ring for the hole, a swing arm washer, a round nut and a stop washer for the round nut. A retaining ring groove is provided on the upper side of the inner end of the mounting hole, and a step surface is provided on the lower side. The elastic retaining ring for the hole and the swing arm washer are respectively located on the upper and lower sides of the angular contact ball bearing, and the elastic retaining ring for the hole is arranged at the retaining ring groove, and the stop washer for the round nut is clamped between the swing arm spindle and the round nut, and the round nut is arranged at the step surface.

[0011] Furthermore, two angular contact ball bearings are provided and arranged face to face.

[0012] Furthermore, the steering gear and the swing arm are located on the same side of the vehicle chassis.

[0013] Furthermore, the length of the right steering knuckle arm is greater than that of the left steering knuckle arm, and the length of the right steering tie rod is greater than that of the left steering tie rod.

[0014] Furthermore, the steering gear is a recirculating ball steering gear, which is arranged vertically. The output end of the steering gear extends along the Y-axis direction, the input end extends along the Z-axis direction, and the longitudinal pull rod extends along the X-axis direction. The X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other.

[0015] Furthermore, the rocker arm has a sickle-shaped appearance.

[0016] The beneficial effects of the utility model are:

[0017] The asymmetric rod system of the utility model only uses one swing arm assembly to simultaneously connect the longitudinal rod, the left steering unit and the right steering unit while meeting the requirements of vehicle handling stability and operation safety, saving parts, reducing the cost of using parts, and reducing the occupation of the vehicle's lateral space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the asymmetric steering linkage provided by the utility model.

[0020] Figure 2 It is a top view schematic diagram of the asymmetric steering linkage provided by the utility model.

[0021] Figure 3 It is a schematic diagram showing the assembly between the left steering unit, right steering unit, steering gear, trailing rod and swing arm assembly.

[0022] Figure 4 It is a structural schematic diagram showing the installation of the swing arm assembly on the chassis in the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the swing arm assembly.

[0024] Figure 6 yes Figure 5 Schematic diagram of the explosion structure.

[0025] Figure 7 yes Figure 5 sectional view of .

[0026] Description of reference numerals:

[0027] 1. Rocker arm; 2. Trailing rod; 3. Left steering tie rod; 4. Right steering tie rod; 5. Swing arm assembly; 6. Left steering knuckle arm; 7. Right steering knuckle arm; 8. Steering gear; 9. Swing arm; 10. Swing arm spindle; 11. Angular contact ball bearing; 12. Circlip for hole; 13. Swing arm washer; 14. Lock washer for round nut; 15. Round nut; 16. Underframe; 17. Left wheel rim; 18. Right wheel rim; 19. Mounting hole; 20. Connecting hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0029] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0030] An embodiment of an asymmetric steering linkage provided by the present invention:

[0031] like Figure 1 and Figure 2 As shown, the asymmetric steering rod system is integrally installed on the vehicle's chassis 16 and is used to drive the left wheel side 17 and the right wheel side 18 to steer, and includes a steering gear 8, a rocker arm 1, a longitudinal tie rod 2, a left steering unit, a right steering unit and a swing arm assembly 5.

[0032] Specifically, such as Figure 2 As shown, the steering gear 8 is a recirculating ball type steering gear, arranged vertically. The output end of the steering gear 8 extends along the Y-axis, the input end extends along the Z-axis, and the trailing rods 2 extend along the X-axis, with the X-axis, Y-axis, and Z-axis directions being perpendicular to each other. The steering gear 8 is secured to the vehicle frame via a steering gear bracket, one end of which is bolted to the steering gear 8 and the other end is bolted to the vehicle frame. Of course, in other embodiments, the steering gear 8 can also be matched with different types of steering gears depending on the specific vehicle model, such as a rack and pinion steering gear, a worm crankpin steering gear, etc.

[0033] like Figure 1 As shown, the rocker arm 1 has a sickle-shaped shape, the upper end of the rocker arm 1 is connected to the output end of the steering gear 8 through a ball head, and the end of the longitudinal tie rod 2 close to the steering gear 8 is connected to the lower end of the rocker arm 1 through a ball head.

[0034] In this embodiment, Figure 3 As shown, the swing arm assembly 5 connects the left steering unit, the right steering unit and the trailing rod 2. Figure 6 and Figure 7 As shown, the swing arm assembly 5 includes a swing arm 9, a swing arm spindle 10, an angular contact ball bearing 11 connected between the swing arm 9 and the swing arm spindle 10, a hole elastic ring 12, a swing arm washer 13, a round nut and a retaining washer 14 for the round nut. The swing arm 9 is provided with a mounting hole 19 and three connecting holes 20. The diameter of the mounting hole 19 is larger than the diameters of the three connecting holes 20, and each connecting hole 20 is provided with a tapered hole at the end. The inner end of the mounting hole 19 is provided with a retaining ring groove on the upper side and a stepped surface on the lower side. Figure 4and Figure 5 As shown, the swing arm shaft 10 is set in the mounting hole 19, and the upper and lower ends are both connected to the base frame 16 by bolts. The hole elastic ring 12 and the swing arm washer 13 are both mounted on the outside of the swing arm shaft 10 and are respectively located on the upper and lower sides of the angular contact ball bearing 11, and the hole elastic ring 12 is set in the retaining ring groove. There are two angular contact ball bearings 11, which are installed face to face and are equipped with sealing rings. The angular contact ball bearings 11 can rotate circumferentially around the swing arm shaft 10, realizing the rotation of the entire swing arm assembly 5 relative to the base frame 16. The round nut retaining washer 14 is clamped between the swing arm shaft 10 and the round nut 15, and the round nut 15 is set on the step surface. As can be seen from the above installation relationship, the hole elastic ring 12, the swing arm washer 13, the round nut 15 and the round nut retaining washer 14 together constitute a limit assembly that can limit the axial displacement of the angular contact ball bearing 11.

[0035] like Figure 3 As shown, the left steering unit includes a left steering knuckle arm 6 and a left steering tie rod 3. The left steering tie rod 3 extends along the Y-axis direction. The end of the left steering tie rod 3 away from the left wheel edge 17 is connected to the swing arm 9 through a ball joint, and the end close to the left wheel edge 17 is connected to the left steering knuckle arm 6 through a ball joint; the end of the left steering knuckle arm 6 away from the left steering tie rod 3 is connected to the left wheel edge 17.

[0036] like Figure 3 As shown, the right steering unit includes a right steering knuckle arm 7 and a right steering tie rod 4. The end of the right steering tie rod 4, away from the right wheel side 18, is connected to the swing arm 9 via a ball joint, while the end closer to the right wheel side 18 is also connected to the right steering knuckle arm 7 via a ball joint. The end of the right steering knuckle arm 7, away from the right steering tie rod 4, is used to connect to the right wheel side 18. The right steering tie rod 4, left steering tie rod 3, and trailing rod 2 are all connected to the swing arm 9 at the connection hole 20 provided on the swing arm 9.

[0037] like Figure 2 As shown, the swing arm assembly 5 and the steering gear 8 are both located on the left side of the chassis 16. This also makes the arm length of the left steering knuckle arm 6 smaller than the arm length of the right steering knuckle arm 7, and the rod length of the left steering tie rod 3 smaller than the rod length of the right steering tie rod 4. Of course, in other embodiments, the positions of the steering gear 8 and the swing arm assembly 5 can be reasonably set according to the specific vehicle model. It is not limited to the embodiment in this application where the arm length of the left steering knuckle arm 6 is smaller than the arm length of the right steering knuckle arm 7, and the rod length of the left steering tie rod 3 is smaller than the rod length of the right steering tie rod 4. Alternatively, the arm length of the left steering knuckle arm 6 can be greater than the arm length of the right steering knuckle arm 7, and the rod length of the left steering tie rod 3 can be greater than the rod length of the right steering tie rod 4. According to the spatial layout of the vehicle chassis 16, reasonable settings can be made to ensure that the length of the left steering tie rod 3 is not equal to the length of the right steering tie rod 4, and the arm length of the left steering knuckle arm 6 is not equal to the arm length of the right steering knuckle arm 7.

[0038] The asymmetric rod system of the present invention can achieve vehicle handling stability and operating safety by simulating the usage of each component. When the above requirements are met, only one swing arm assembly 5 can be used to simultaneously connect the longitudinal rod 2, the left steering unit and the right steering unit, saving parts, reducing the cost of using parts, and reducing the occupation of the vehicle's lateral space.

[0039] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "left", "right", "arm length", "rod length", "top", "bottom", "inside", "outside" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings of this specification. They are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An asymmetric steering linkage system, comprising a steering gear, a rocker arm, a trailing rod, a left steering unit, and a right steering unit, wherein the upper end of the rocker arm is connected to the output end of the steering gear via a ball joint, and the lower end of the rocker arm is connected to the trailing rod via a ball joint; characterized in that: Also included is a swing arm assembly for rotationally mounting on the vehicle chassis; The left steering unit includes a left steering knuckle arm and a left steering tie rod, one end of the left steering tie rod is connected to the swing arm assembly through a ball joint, and the other end is connected to the left steering knuckle arm through a ball joint, and the other end of the left steering knuckle arm is used to connect to the left wheel side; The right steering unit includes a right steering knuckle arm and a right steering tie rod. One end of the right steering tie rod is connected to the swing arm assembly through a ball joint, and the other end is connected to the right steering knuckle arm through a ball joint. The other end of the right steering knuckle arm is used to connect to the right wheel side. The end of the longitudinal tie rod away from the rocker arm is connected to the swing arm assembly through a ball joint. The length of the left steering knuckle arm is not equal to the length of the right steering knuckle arm, and the length of the left steering tie rod is not equal to the length of the right steering tie rod.

2. The asymmetric steering linkage according to claim 1, characterized in that: The swing arm assembly includes a swing arm, a swing arm spindle, and an angular contact ball bearing connected between the swing arm and the swing arm spindle; the swing arm is provided with connecting holes corresponding to the left steering tie rod, the right steering tie rod and the longitudinal tie rod respectively, and is also provided with a mounting hole for installing the swing arm spindle, and a limit assembly for limiting the axial displacement of the angular contact ball bearing is provided in the mounting hole.

3. The asymmetric steering linkage according to claim 2, characterized in that: The limiting assembly includes an elastic retaining ring for the hole, a swing arm washer, a round nut and a stop washer for the round nut. A retaining ring groove is provided on the upper side of the inner end of the mounting hole, and a step surface is provided on the lower side. The elastic retaining ring for the hole and the swing arm washer are respectively located on the upper and lower sides of the angular contact ball bearing, and the elastic retaining ring for the hole is arranged at the retaining ring groove. The stop washer for the round nut is clamped between the swing arm spindle and the round nut, and the round nut is arranged at the step surface.

4. The asymmetric steering linkage according to claim 3, characterized in that: There are two angular contact ball bearings, which are arranged face to face.

5. An asymmetric steering linkage according to any one of claims 1 to 4, characterized in that: The steering gear and the swing arm are located on the same side of the vehicle chassis.

6. The asymmetric steering linkage according to claim 5, characterized in that: The length of the right steering knuckle arm is greater than that of the left steering knuckle arm, and the length of the right steering tie rod is greater than that of the left steering tie rod.

7. An asymmetric steering linkage according to any one of claims 1 to 4, characterized in that: The steering gear is a recirculating ball steering gear, which is arranged vertically. The output end of the steering gear extends along the Y-axis direction, the input end extends along the Z-axis direction, and the longitudinal pull rod extends along the X-axis direction. The X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other.

8. The asymmetric steering linkage according to any one of claims 1 to 4, characterized in that: The rocker arm has a sickle-shaped outer shape.

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