Eccentric adjusting mechanism and front double-wishbone suspension

Abstract

The invention discloses an eccentric adjusting mechanism and a front double-fork-arm suspension. The eccentric adjusting mechanism comprises a limiting adjusting rod, two eccentric adjusting gaskets and two eccentric limiting gaskets. The two eccentric adjusting gaskets are eccentrically connected to the two opposite ends of the limiting adjusting rod in a sleeving mode correspondingly. The two eccentric limiting gaskets are connected to the two eccentric adjusting gaskets respectively, kidney-shaped holes are formed in the eccentric limiting gaskets, the limiting adjusting rod is arranged in the kidney-shaped holes in a penetrating mode, and the limiting adjusting rod can drive the two eccentric adjusting gaskets to rotate relative to the eccentric limiting gaskets. And under the limiting action of the eccentric limiting gasket, the limiting adjusting rod reciprocates along the waist-shaped hole. The invention discloses an eccentric adjusting mechanism and a front double-wishbone suspension. The eccentric adjusting mechanism and the front double-wishbone suspension are used for solving the problem that the existing kingpin caster angle adjusting performance is not ideal.

Description

Technical Field

[0001] This application relates to the field of vehicle suspension system technology, and more specifically, to an eccentric adjustment mechanism and a front double wishbone suspension. Background Technology

[0002] Because the left and right sides of the front double wishbone suspension are independent, during the manufacturing process, due to tolerances and other factors, the left and right sides cannot be kept completely consistent.

[0003] In a typical front double wishbone suspension, the upper control arm is bolted to the vehicle body, and the lower control arm is bolted to the subframe. The line connecting the upper and lower control arm ball joints forms the kingpin of the front suspension system. The angle between the kingpin's projection onto the vehicle's longitudinal plane and the vertical line to the ground is the caster angle. The caster angle plays a crucial role in maintaining vehicle straight-line stability and enabling automatic steering return. Therefore, ensuring that the caster angle matches the design value, and also ensuring the caster angles on the left and right sides, is particularly important. Existing front double wishbone suspensions use a non-adjustable caster angle design.

[0004] Furthermore, when assembling using stamped and welded assemblies, significant deviations in the caster angle may occur during four-wheel alignment adjustments. Under normal circumstances, for vehicle handling and driving smoothness, the caster angle deviation should be within ±60′, and the difference between the left and right sides should be within ±45′. If welding assembly is used, these deviations cannot be met due to manufacturing tolerances and assembly process precision issues, leading to abnormal alarms, impacting production cycle time, and even resulting in the discarding of parts.

[0005] Therefore, an eccentric adjustment mechanism and a front double wishbone suspension are needed to solve the above problems. Summary of the Invention

[0006] In view of this, the purpose of this application is to propose an eccentric adjustment mechanism and a front double wishbone suspension to solve the problem of unsatisfactory kingpin caster adjustment performance in existing systems.

[0007] Based on the above objectives, this application provides an eccentric adjustment mechanism, comprising: a limiting adjustment rod, two eccentric adjustment shims, and two eccentric limiting shims; the two eccentric adjustment shims are respectively eccentrically positioned and sleeved onto the opposite ends of the limiting adjustment rod; the two eccentric limiting shims are respectively connected to the two eccentric adjustment shims, and each eccentric limiting shim is provided with an oblong hole, through which the limiting adjustment rod passes, and the limiting adjustment rod can drive the two eccentric adjustment shims to rotate relative to the eccentric limiting shims, and under the limiting action of the eccentric limiting shims, the limiting adjustment rod reciprocates along the oblong hole.

[0008] Optionally, at least one of the eccentric adjusting shims is capable of reciprocating along the axial direction of the limiting adjusting rod.

[0009] Optionally, the two eccentric adjustment shims include at most one fixed eccentric adjustment shim and at least one movable eccentric adjustment shim. The fixed eccentric adjustment shim is fixedly connected to the limiting adjustment rod, and the movable eccentric adjustment shim is movably connected to the limiting adjustment rod in the axial direction and engaged in the circumferential direction.

[0010] Optionally, the limiting adjustment rod is provided with a groove extending through at least one end along the axial direction; the movable eccentric adjustment shim is provided with an eccentric hole, the eccentric hole is provided with a protrusion, and the limiting adjustment rod passes through the eccentric hole, so that the protrusion is embedded in the groove and can reciprocate along the groove.

[0011] Optionally, the limiting adjustment rod includes a first bolt and a first nut. The first bolt includes a first screw and a first nut disposed at one end of the first screw. The first nut is connected to the other end of the first screw and can reciprocate along the first screw. The first eccentric adjustment shim is integrally formed with the first nut. The groove passes through the other end of the first screw. The protrusion of the movable eccentric adjustment shim is embedded in the groove. The movable eccentric adjustment shim contacts the first nut. Optionally, the limiting adjustment rod includes a second screw and two second nuts, the two second nuts being respectively connected to opposite ends of the second screw and capable of reciprocating along the second screw; the groove extends through opposite ends of the second screw, the protrusions of the two movable eccentric adjustment shims are respectively embedded in the groove, and the two movable eccentric adjustment shims are respectively in contact with the two second nuts. Optionally, the eccentric limiting shim includes a base plate and sidewalls extending from opposite ends of the base plate, the base plate and the two sidewalls forming a groove; the waist-shaped hole is disposed on the base plate, and the eccentric adjusting shim is rotatably connected to the groove.

[0012] Optionally, reinforcing protrusions are provided on both opposite sides of the substrate.

[0013] This application also provides a front double wishbone suspension, which includes: a first longitudinal beam, an upper control arm assembly, and two eccentric adjustment mechanisms as described above. The first longitudinal beam is provided with two sets of opposing and spaced-apart brackets. The opposite ends of the upper control arm assembly are respectively connected to the eccentric adjustment mechanisms and connected to the brackets through the eccentric adjustment mechanisms. The upper control arm assembly is provided with a first ball joint pin. The eccentric adjustment mechanisms can drive the upper control arm assembly to reciprocate along the height direction of the brackets to adjust the position of the first ball joint pin.

[0014] Optionally, the front double wishbone suspension further includes: a front subframe assembly and a second longitudinal beam and a lower control arm assembly respectively disposed on adjacent side surfaces of the front subframe assembly, wherein the second longitudinal beam is opposite to and spaced apart from the first longitudinal beam, and the lower control arm assembly is provided with a second ball joint pin, and the line connecting the first ball joint pin and the second ball joint pin is the kingpin of the front suspension system.

[0015] As can be seen from the above, the eccentric adjustment mechanism and front double wishbone suspension provided in this application have the following advantages compared with the prior art: Using the aforementioned eccentric adjustment mechanism, the eccentric adjustment mechanism is used to install and adjust the installation position of the upper control arm assembly on the first longitudinal beam. When the limiting adjustment rod drives the eccentric adjustment shim to rotate, the eccentric limiting shim will limit the limiting adjustment rod to slide within the oblong hole, thereby driving the upper control arm assembly to move and change the installation position of the upper control arm assembly relative to the vehicle body. This adjusts the position of the first ball pin of the upper control arm assembly, thereby adjusting the kingpin caster angle and further adjusting the kingpin caster angle. This allows for convenient adjustment of the kingpin caster angle without completely disassembling the suspension assembly, improving adjustment accuracy and efficiency, solving various problems caused by large differences between the left and right kingpin caster angles, adapting to track tuning and personalized driving needs, being compatible with existing double wishbone architectures, and facilitating modifications for mass-produced models and personalized driving requirements. Attached Figure Description

[0016] The above features and technical advantages of this application will become clearer and easier to understand from the following description of its embodiments in conjunction with the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the eccentric adjustment mechanism used in a specific embodiment of this application.

[0018] Figure 2 for Figure 1 The diagram shows the connection status of the bolts of the eccentric adjustment mechanism with the fixed eccentric adjustment shims and the movable eccentric adjustment shims.

[0019] Figure 3 for Figure 1 The diagram shows the connection status of the eccentric limit pad of the eccentric adjustment mechanism.

[0020] Figure 4 for Figure 1 The diagram shows the operational status of the eccentric adjustment mechanism.

[0021] Figure 5 This is a schematic diagram of the front double wishbone suspension used in a specific embodiment of this application.

[0022] Figure 6 for Figure 5 The image shows a side view of the front double wishbone suspension.

[0023] Figure 7 for Figure 5 Another side view of the front double wishbone suspension shown.

[0024] The attached diagrams are labeled as follows: 1. First longitudinal beam; 2. Upper control arm assembly; 3. Second longitudinal beam; 4. Lower control arm assembly; 5. Front subframe assembly; 10. Eccentric adjustment mechanism; 6. Fixed eccentric adjustment shim; 7. Moving eccentric adjustment shim; 71. Protrusion; 8. Bolt; 81. Groove; 82. Nut; 9. Eccentric limit shim; 91. Waist-shaped hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0026] Figure 1 This is a schematic diagram of the eccentric adjustment mechanism 10 used in a specific embodiment of this application. Figure 2 for Figure 1 The diagram shows the connection state of the bolts of the eccentric adjustment mechanism 10 with the fixed eccentric adjustment shim 6 and the movable eccentric adjustment shim 7. Figure 3 for Figure 1 A schematic diagram showing the connection state of the eccentric limiting pad 9 of the eccentric adjustment mechanism 10. Figure 4 for Figure 1 The diagram shows the operational status of the eccentric adjustment mechanism 10. Figures 1 to 4 As shown, the eccentric adjustment mechanism 10 includes a limit adjustment rod 8, two eccentric adjustment shims, and two eccentric limit shims 9.

[0027] The eccentric adjustment mechanism 10 includes a limit adjustment rod 8, two eccentric adjustment shims, and two eccentric limit shims 9; the limit adjustment rod 8 includes a first end and a second end. In order to facilitate the rotation of the limit adjustment rod 8, detachable limit protrusions 71 can be provided on the opposite ends or one end of the limit adjustment rod 8.

[0028] Two eccentric adjustment shims are respectively eccentrically mounted and connected to the opposite ends of the limit adjustment rod 8; two eccentric limit shims 9 are respectively connected to the two eccentric adjustment shims. For example, an eccentric adjustment shim and an eccentric limit shim 9 are provided on the first end, and an eccentric adjustment shim and an eccentric limit shim 9 are provided near the second end.

[0029] The eccentric adjustment shim can be fixed to the limit adjustment rod 8, or it can be movably connected to the limit adjustment rod 8. For example, the eccentric adjustment shim is provided with an eccentric hole, and the eccentric adjustment shim is sleeved and connected to the limit adjustment rod 8 through the eccentric hole; The eccentric limiting shim 9 is usually connected to a designated position on the vehicle body. For example, the eccentric limiting shim 9 is connected to the bracket of the first longitudinal beam 1. The eccentric limiting shim 9 is provided with an oblong hole 91. For example, the eccentric limiting shim 9 is provided with an eccentric oblong hole 91. The eccentric limiting shim 9 is sleeved and connected to the limiting adjustment rod 8 through the oblong hole 91. The height of the oblong hole 91 is close to the diameter of the limiting adjustment rod 8, and the length of the oblong hole 91 is greater than the diameter of the limiting adjustment rod 8.

[0030] The limiting adjustment rod 8 passes through the oblong hole 91. When the limiting adjustment rod 8 rotates, it can drive the two eccentric adjustment shims to rotate relative to the eccentric limiting shim 9. Since the position of the eccentric limiting shim 9 is fixed, the eccentric limiting shim 9 provides a limiting function for the eccentric adjustment shims. Under the limiting function of the eccentric limiting shim 9, the limiting adjustment rod 8 moves back and forth along the oblong hole 91.

[0031] During assembly, two sets of supports are installed on the first longitudinal beam 1, and an eccentric adjustment mechanism 10 is installed on each set of supports. Each set of supports includes two ear-type supports, and two eccentric limiting shims 9 are respectively connected to one set of supports, that is, each ear-type support is connected to an eccentric limiting shim 9, such as the eccentric limiting shims 9 being welded to the ear-type supports. An eccentric adjustment shim is rotatably connected to each eccentric limiting shim 9. The opposite ends of the upper swing arm assembly 2 are respectively set between the two sets of supports, that is, each end of the upper swing arm assembly 2 is located between the two supports. The limiting adjustment rod 8 passes through the eccentric adjustment shim, the eccentric limiting shim 9, one end of the upper swing arm assembly 2, the eccentric limiting shim 9, and the eccentric adjustment shim in sequence, locking the relative position of the two eccentric adjustment shims on the limiting adjustment rod 8.

[0032] In use, when the limit adjustment rod 8 rotates, it simultaneously drives the two eccentric adjustment shims to rotate relative to the eccentric limit shim 9. Under the constraint of the eccentric limit shim 9, the limit adjustment rod 8 reciprocates along the oblong hole 91. The upper control arm assembly 2 is arc-shaped, with a first ball joint pin in its middle and a second ball joint pin on the lower control arm assembly 4. The line connecting the first and second ball joint pins is the kingpin of the front suspension system, and the angle between the projection of the kingpin onto the vehicle's longitudinal plane and the vertical line to the ground is the kingpin caster angle. When the limit adjustment rod 8 moves within the eccentric limit shim 9, the first ball joint pin of the upper control arm assembly 2 moves accordingly, and the tilt angle of the kingpin axis changes, i.e., the kingpin caster angle changes. That is, by using the eccentric limit shim 9 on the side of the upper control arm assembly 2 and the vehicle body mounting point, and utilizing the oblong hole 91, the center point of the first ball joint pin of the upper control arm assembly 2 in the X direction can be adjusted, thereby achieving the adjustment of the kingpin caster angle. To meet the adjustment needs under different circumstances.

[0033] Specifically, such as Figure 5 and Figure 6 As shown, the front side of the upper swing arm moves outward (away from the side of the first longitudinal beam 1). Figure 5 The limiting adjustment rod 8 on the left side of the upper control arm assembly 2 causes the first ball joint pin on the upper control arm assembly 2 to move backward. Figure 5 Move from left to right, thereby increasing the kingpin tilt angle; move the front side of the upper swing arm inward (towards the first longitudinal beam 1). Figure 5 The limiting adjustment lever 8 (on the left side) causes the first ball joint pin on the outer assembly of the upper control arm to move forward ( Figure 5 Move from right to left, thereby reducing the kingpin tilt angle; move the upper swing arm rear side outward (away from the first longitudinal beam 1). Figure 5 The limiting adjustment rod 8 on the right side of the upper control arm assembly 2 causes the first ball joint pin on the upper control arm assembly 2 to move forward ( Figure 5 Move from right to left, thereby reducing the kingpin tilt angle; move the upper swing arm rear side inward (towards the side closer to the first longitudinal beam 1). Figure 5 The limiting adjustment rod 8 on the right side of the upper control arm assembly 2 causes the first ball joint pin on the upper control arm assembly 2 to move backward. Figure 5 (From left to right) the kingpin moves, thereby increasing the kingpin backslope angle.

[0034] The aforementioned eccentric adjustment mechanism 10 is used to install and adjust the installation position of the upper control arm assembly 2 on the first longitudinal beam 1. When the limit adjustment rod 8 drives the eccentric adjustment shim to rotate, the eccentric limit shim 9 will limit the limit adjustment rod 8 to slide within the waist-shaped hole 91, thereby driving the upper control arm assembly 2 to move and change the installation position of the upper control arm assembly 2 relative to the vehicle body. This adjusts the position of the first ball pin of the upper control arm assembly 2, thereby adjusting the kingpin caster angle and further adjusting the kingpin caster angle. This allows for convenient adjustment of the kingpin caster angle without completely disassembling the suspension assembly, improving the adjustment accuracy and efficiency, solving various problems caused by large differences between the left and right kingpin caster angles, and adapting to track tuning and personalized driving needs. It is also compatible with existing double wishbone architectures and facilitates modifications for mass-produced models and personalized driving needs.

[0035] To increase the applicability of the eccentric adjustment shims to different first longitudinal beams 1, optionally, at least one eccentric adjustment shim can reciprocate along the axial direction of the limiting adjustment rod 8. Of the two eccentric adjustment shims, typically one is fixedly mounted on the limiting adjustment rod 8, while the other can be detached from the limiting adjustment rod 8 and, after being mounted on the limiting adjustment rod 8, can reciprocate along it. Alternatively, both eccentric adjustment shims can be made movable. When the eccentric adjustment shims can move along the axial direction of the limiting adjustment rod 8, the distance between the two eccentric adjustment shims can be adjusted, increasing the flexibility of the eccentric adjustment mechanism 10.

[0036] To further enhance the flexibility of the eccentric adjustment mechanism 10 and adapt it to different installation distances, optionally, the two eccentric adjustment shims include at most one fixed eccentric adjustment shim 6 and at least one movable eccentric adjustment shim 7. The fixed eccentric adjustment shim 6 is fixedly connected to the limit adjustment rod 8, and the movable eccentric adjustment shim 7 is movably connected to the limit adjustment rod 8 in the axial direction and engaged in the circumferential direction. The position of the fixed eccentric adjustment shim 6 on the limit adjustment rod 8 is relatively fixed. The movable eccentric adjustment shim 7 is installed at the right end of the limit adjustment rod 8 and can reciprocate within a certain range along the axial direction of the limit adjustment rod 8 to adjust the distance between it and the fixed eccentric adjustment shim 6. At the same time, the movable eccentric adjustment shim 7 is engaged in the circumferential direction with the limit adjustment rod 8, so that when the limit adjustment rod 8 rotates, it can drive the movable eccentric adjustment shim 7 and the fixed eccentric adjustment shim 6 to rotate synchronously.

[0037] In one embodiment of this application, the fixed eccentric adjustment shim 6 is provided with an eccentric hole. The fixed eccentric adjustment shim 6 is sleeved and fixed to the limiting adjustment rod 8 through the eccentric hole, or the fixed eccentric adjustment shim 6 and the limiting adjustment rod 8 are integrally formed. When the limiting adjustment rod 8 rotates, the limiting adjustment rod 8 drives the fixed eccentric adjustment shim 6 to rotate synchronously. The fixed eccentric adjustment shim 6 is provided with a weight reduction hole, and a scale mark is provided on the outer edge of the weight reduction hole. The rotation angle of the limiting adjustment rod 8 can be clearly identified by the scale mark.

[0038] In one embodiment of this application, the two eccentric adjustment shims are a fixed eccentric adjustment shim 6 and a movable eccentric adjustment shim 7. The fixed eccentric adjustment shim 6 is disposed at the left end of the limiting adjustment rod 8, and the movable eccentric adjustment shim 7 is installed at the right end of the limiting adjustment rod 8 and can reciprocate within a certain range. The movable eccentric adjustment shim 7 is engaged with the limiting adjustment rod 8 in the circumferential direction, and the limiting adjustment rod 8 can simultaneously drive the fixed eccentric adjustment shim 6 and the movable eccentric adjustment shim 7 to reciprocate.

[0039] In another embodiment of this application, both eccentric adjustment shims are movable eccentric adjustment shims 7. One movable eccentric adjustment shim 7 is installed at the left end of the limiting adjustment rod 8 and can reciprocate within a certain range. The other movable eccentric adjustment shim 7 is installed at the right end of the limiting adjustment rod 8 and can reciprocate within a certain range. The two movable eccentric adjustment shims 7 can move closer to or further away from each other to adjust the distance between them. Both movable eccentric adjustment shims 7 are engaged with the limiting adjustment rod 8 in the circumferential direction, and the limiting adjustment rod 8 can simultaneously drive the two movable eccentric adjustment shims 7 to reciprocate.

[0040] To facilitate the assembly and control of the limiting adjustment rod 8 and the movable eccentric adjustment shim 7, optionally, the limiting adjustment rod 8 is provided with a groove 81 extending through at least one end along the axial direction; the movable eccentric adjustment shim 7 is provided with an eccentric hole, and a protrusion 71 is provided on the eccentric hole. The limiting adjustment rod 8 passes through the eccentric hole, so that the protrusion 71 is embedded in the groove 81 and can reciprocate along the groove 81. The groove 81 extends from one end of the limiting adjustment rod 8 to the other end. The movable eccentric adjustment shim 7 is embedded in the groove 81 through the protrusion 71. The movable eccentric adjustment shim 7 reciprocates within the groove 81 through the protrusion 71, realizing position adjustment in the axial direction of the limiting adjustment rod 8. When the limiting adjustment rod 8 rotates, the groove 81 pushes the protrusion 71, and the protrusion 71 drives the movable eccentric adjustment shim 7 to rotate. In use, the fixed eccentric adjustment shim 6 and the limit adjustment rod 8 are integrated. The movable eccentric adjustment shim 7 is engaged with the groove 81 on the limit adjustment rod 8 via the protrusion 71, becoming integrated as one unit. The eccentric limit shims 9 on both sides are welded to the bracket on the first longitudinal beam 1. The limit adjustment rod 8 passes through the bracket on the first longitudinal beam 1 and the oblong hole 91 of the eccentric limit shim 9. When the limit adjustment rod 8 rotates, it slides along the oblong hole 91, thereby driving the upper control arm assembly 2 connected to the limit adjustment rod 8 to move. Changing the installation position of the upper control arm assembly 2 relative to the vehicle body affects the position of the first outer ball pin on the upper control arm assembly 2, thereby affecting the kingpin caster angle and achieving the purpose of adjusting the kingpin caster angle.

[0041] To simplify the structure and reduce manufacturing costs, the limiting adjustment rod 8 may optionally include a first bolt and a first nut 82. The first bolt includes a first threaded rod and a first nut at one end of the first threaded rod. The first nut 82 is connected to the other end of the first threaded rod and can reciprocate along the first threaded rod. A first eccentric adjustment shim is integrally formed with the first nut, and a groove 81 passes through the other end of the first threaded rod. The protrusion 71 of the movable eccentric adjustment shim 7 is embedded in the groove 81, and the movable eccentric adjustment shim 7 contacts the first nut 82. The first threaded rod passes through the eccentric hole of the fixed eccentric adjustment shim 6, and the fixed eccentric adjustment shim 6 is pressed against the first nut. The first threaded rod passes through the eccentric hole of the movable eccentric adjustment shim 7, and the protrusion 71 is embedded in the groove 81 and can move along the groove 81 to adjust the distance between the fixed eccentric adjustment shim 6 and the movable eccentric adjustment shim 7. The first nut 82 moves along the first threaded rod until it is pressed against the movable eccentric adjustment shim 7, thereby locking the position of the movable eccentric adjustment shim 7.

[0042] To further improve installation flexibility, optionally, the limiting adjustment rod 8 includes a second screw and two second nuts 82. The two second nuts 82 are respectively connected to the opposite ends of the second screw and can reciprocate along the second screw. A groove 81 passes through the opposite ends of the second screw, and the protrusions 71 of the two movable eccentric adjustment shims 7 are respectively embedded in the groove 81. The two movable eccentric adjustment shims 7 are respectively in contact with the two second nuts 82. The opposite ends of the second screw are respectively provided through the eccentric holes of the two movable eccentric adjustment shims 7. The protrusions 71 of the two movable eccentric adjustment shims 7 are respectively embedded in the groove 81 and can move towards or away from each other along the groove 81 to adjust the distance between the two movable eccentric adjustment shims 7. The two second nuts 82 move along the second screw from the end to the middle until they are respectively pressed against the movable eccentric adjustment shims 7, thereby locking the position of the movable eccentric adjustment shims 7.

[0043] Optionally, the eccentric limiting shim 9 includes a base plate and sidewalls extending from opposite ends of the base plate, with the sidewalls smoothly transitioning to the base plate. The base plate and the two sidewalls enclose a groove; an oblong hole 91 is provided on the base plate, and the eccentric limiting shim 9 is rotatably connected to the groove. The base plate is usually fixed in a designated position, and the eccentric adjusting shim is engaged in the eccentric limiting shim 9 and can rotate within the eccentric limiting shim 9. Since the limiting adjusting rod 8 is eccentrically set on the eccentric adjusting shim, when the limiting adjusting rod 8 rotates to the sidewall, the sidewall presses against the eccentric adjusting shim, causing the limiting adjusting rod 8 to move along the oblong hole 91 while rotating. Using the above-mentioned eccentric limiting shim 9, after the upper swing arm assembly 2 is installed in a designated position by the eccentric adjusting mechanism 10, the position can still be adjusted within a certain range, thereby adjusting the kingpin tilt angle.

[0044] To improve the structural strength of the eccentric limiting pad 9 and prevent deformation caused by compression that could affect the movement of the limiting adjustment rod 8, optionally, reinforcing protrusions 71 are provided on both opposite sides of the substrate. The reinforcing protrusions 71 are located on the top and bottom ends of the substrate and are centrally positioned, and the reinforcing protrusions 71 have a trapezoidal structure.

[0045] Figure 5 This is a schematic diagram of the front double wishbone suspension used in a specific embodiment of this application. Figure 6 for Figure 5 The image shows a side view of the front double wishbone suspension. Figure 7 for Figure 5 Another side view of the front double wishbone suspension shown. Figures 5 to 7 As shown, the front double wishbone suspension includes: a first longitudinal beam 1, an upper control arm assembly 2, two eccentric adjustment mechanisms 10 as described above, a second longitudinal beam 3, a lower control arm assembly 4, and a front subframe assembly 5.

[0046] This application also provides a front double wishbone suspension, which includes: a first longitudinal beam 1, an upper control arm assembly 2, and two eccentric adjustment mechanisms 10 as described above. The first longitudinal beam 1 is provided with two sets of opposing and spaced-apart brackets. The opposite ends of the upper control arm assembly 2 are respectively connected to the eccentric adjustment mechanisms 10 and connected to the brackets through the eccentric adjustment mechanisms 10. The upper control arm assembly 2 is provided with a first ball joint pin. The eccentric adjustment mechanism 10 can drive the upper control arm assembly 2 to move back and forth along the height direction of the bracket to adjust the position of the first ball joint pin.

[0047] Two sets of supports are provided on the first longitudinal beam 1, and an eccentric adjustment mechanism 10 is installed on each set of supports. Each set of supports includes two ear-type supports, and two eccentric limiting shims 9 are respectively connected to one set of supports, that is, each ear-type support is connected to an eccentric limiting shim 9, such as the eccentric limiting shim 9 being welded to the ear-type support. An eccentric adjustment shim is rotatably connected to each eccentric limiting shim 9. The opposite ends of the upper swing arm assembly 2 are respectively set between the two sets of supports, that is, each end of the upper swing arm assembly 2 is located between the two supports. The limiting adjustment rod 8 passes through the eccentric adjustment shim, the eccentric limiting shim 9, one end of the upper swing arm assembly 2, the eccentric limiting shim 9, and the eccentric adjustment shim in sequence, locking the relative position of the two eccentric adjustment shims on the limiting adjustment rod 8. The working principle of the eccentric adjustment mechanism 10 is as follows: When the position of the limiting adjustment rod 8 at the connection point between the end of the upper swing arm assembly 2 and the first longitudinal beam 1 is adjusted in the YZ plane (the left-right and up-down direction of the vehicle), the limiting adjustment rod 8 moves laterally on the plane of the bracket of the first longitudinal beam 1, and the first ball head pin on the upper swing arm assembly 2 moves accordingly. The position of the second ball head pin on the lower swing arm assembly 4 remains unchanged. The line connecting the first ball head pin and the second ball head pin is the main pin, and the tilt angle of the main pin axis changes.

[0048] In actual adjustment, the eccentric adjustment mechanisms 10 on both the front and rear sides of the upper control arm assembly 2 can cooperate to achieve the adjustment purpose, thereby realizing the adjustment of different kingpin tilt angles to meet different needs. Typically, the position of each end of the upper control arm assembly 2 is adjusted one by one. For example, to increase the kingpin tilt angle, the front side of the upper control arm can be moved outward (away from the first longitudinal beam 1). Figure 5 The limiting adjustment rod 8 on the left side can also be moved inward (towards the side closer to the first longitudinal beam 1) to the rear side of the upper swing arm. Figure 5 The limiting adjustment rod 8 (right side) can be moved inward (towards the first longitudinal beam 1) to reduce the kingpin tilt angle. Figure 5 The limiting adjustment rod 8 on the left side can also be moved outward (away from the first longitudinal beam 1) to the rear side of the upper swing arm. Figure 5The limit adjustment rod 8 is located on the right side of the upper control arm assembly. The upper control arm assembly 2 is connected to the first longitudinal beam 1 through the eccentric adjustment mechanism 10, which integrates the adjustment function of the upper control arm assembly 2. The eccentric adjustment mechanism 10 is closer to the upper point of the kingpin, and the adjustment sensitivity is higher. The upper control arm assembly 2 can be adjusted in conjunction with the front and rear sides to achieve a wider range of kingpin caster angle adjustment to meet the needs of different drivers.

[0049] The aforementioned double wishbone suspension employs an eccentric adjustment mechanism 10 for mounting and adjusting the upper control arm assembly 2 on the first longitudinal beam 1. When the limiting adjustment rod 8 rotates the eccentric adjustment shim, the eccentric limiting shim 9 restricts the limiting adjustment rod 8 to slide within the oblong hole 91, thereby moving the upper control arm assembly 2 and changing its mounting position relative to the vehicle body. By adjusting the position of each end of the upper control arm assembly 2 through the eccentric adjustment mechanism 10, the position of the first ball joint pin on the upper control arm assembly 2 is adjusted, thereby changing the tilt angle of the kingpin axis of the front suspension system, i.e., the kingpin caster angle changes. This allows for convenient adjustment of the kingpin caster angle without completely disassembling the suspension assembly, improving adjustment accuracy and efficiency, solving various problems caused by large differences in the left and right kingpin caster angles, adapting to track tuning and personalized driving needs, and being compatible with existing double wishbone architectures, facilitating modifications for mass-produced models and personalized driving requirements.

[0050] Optionally, the front double wishbone suspension further includes: a front subframe assembly 5 and a second longitudinal beam 3 and a lower control arm assembly 4 respectively disposed on adjacent side surfaces of the front subframe assembly 5. The second longitudinal beam 3 is opposite to and spaced apart from the first longitudinal beam 1. A second ball joint pin is disposed on the lower control arm assembly 4, and the line connecting the first ball joint pin and the second ball joint pin is the kingpin of the front suspension system. To increase the kingpin caster angle, the front side of the upper control arm (away from the first longitudinal beam 1) can be moved outward (towards the side away from the first longitudinal beam 1). Figure 5 The limiting adjustment rod 8 on the left side of the upper control arm assembly 2 causes the first ball joint pin on the upper control arm assembly 2 to move backward. Figure 5 The upper swing arm can be moved from left to right; it can also be moved inward (towards the side closer to the first longitudinal beam 1) to the rear side. Figure 5 The limiting adjustment rod 8 on the right side of the upper control arm assembly 2 causes the first ball joint pin on the upper control arm assembly 2 to move backward. Figure 5 Move from left to right. To reduce the kingpin caster angle, the front side of the upper swing arm can be moved inward (towards the first longitudinal beam 1). Figure 5 The limiting adjustment lever 8 (on the left side) causes the first ball joint pin on the outer assembly of the upper control arm to move forward ( Figure 5 The upper swing arm can be moved from right to left (or from the side away from the first longitudinal beam 1). Figure 5 The limiting adjustment rod 8 on the right side of the upper control arm assembly 2 causes the first ball joint pin on the upper control arm assembly 2 to move forward ( Figure 5 Move from right to left (in the middle).

[0051] The aforementioned front double wishbone suspension connects the upper suspension assembly to the first longitudinal beam 1 via an eccentric adjustment mechanism 10. When kingpin caster angle adjustment is required, the upper suspension assembly position can be adjusted simply by rotating the adjustment rod, allowing for rapid adjustment without disassembling the upper suspension assembly. This supports adjustments at the four-wheel alignment points off the production line or in a lifted state when a customer requests modifications, significantly improving production line, service station, and track engineering efficiency. Furthermore, the modular design of the eccentric adjustment mechanism 10 allows for mass production as an independent module, making it suitable for various front double wishbone suspensions and exhibiting excellent versatility.

[0052] As can be seen from the above description and practice, the eccentric adjustment mechanism and front double wishbone suspension provided in this application have the following advantages compared with the prior art: Using the above-mentioned eccentric adjustment mechanism, the eccentric adjustment mechanism is used to install and adjust the installation position of the upper control arm assembly on the first longitudinal beam. When the limiting adjustment rod drives the eccentric adjustment shim to rotate, the eccentric limiting shim will limit the limiting adjustment rod to slide within the oblong hole, thereby driving the upper control arm assembly to move and change the installation position of the upper control arm assembly relative to the vehicle body. This adjusts the position of the first ball pin of the upper control arm assembly, thereby adjusting the kingpin caster angle and further adjusting the kingpin caster angle. This allows for convenient adjustment of the kingpin caster angle without completely disassembling the suspension assembly, improving adjustment accuracy and efficiency, solving various problems caused by large differences in the left and right kingpin caster angles, adapting to track tuning and personalized driving needs, being compatible with existing double wishbone architectures, and facilitating modifications for mass-produced models and personalized driving requirements.

[0053] Those skilled in the art should understand that the above description is merely a specific embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the scope of this application should be included within the protection scope of this application.

Claims

1. An eccentric adjustment mechanism, characterized in that, include: Limit adjustment rod, two eccentric adjustment shims and two eccentric limit shims; Two eccentric adjusting shims are respectively eccentrically mounted and sleeved at opposite ends of the limiting adjusting rod; two eccentric limiting shims are respectively connected to the two eccentric adjusting shims, and each eccentric limiting shim is provided with an oblong hole. The limiting adjusting rod passes through the oblong hole and can drive the two eccentric adjusting shims to rotate relative to the eccentric limiting shims. Under the limiting action of the eccentric limiting shims, the limiting adjusting rod reciprocates along the oblong hole.

2. The eccentric adjustment mechanism according to claim 1, characterized in that: At least one of the eccentric adjusting shims is capable of reciprocating along the axial direction of the limiting adjusting rod.

3. The eccentric adjustment mechanism according to claim 2, characterized in that: The two eccentric adjustment shims include at most one fixed eccentric adjustment shim and at least one movable eccentric adjustment shim. The fixed eccentric adjustment shim is fixedly connected to the limiting adjustment rod, and the movable eccentric adjustment shim is movably connected to the limiting adjustment rod in the axial direction and engaged in the circumferential direction.

4. The eccentric adjustment mechanism according to claim 3, characterized in that: The limiting adjustment rod is provided with a groove extending through at least one end along the axial direction; the movable eccentric adjustment shim is provided with an eccentric hole, and the eccentric hole is provided with a protrusion; the limiting adjustment rod passes through the eccentric hole, so that the protrusion is embedded in the groove and can reciprocate along the groove.

5. The eccentric adjustment mechanism according to claim 4, characterized in that: The limiting adjustment rod includes a first bolt and a first nut. The first bolt includes a first screw and a first nut disposed at one end of the first screw. The first nut is connected to the other end of the first screw and can reciprocate along the first screw. The first eccentric adjustment shim is integrally formed with the first nut. The groove passes through the other end of the first screw. The protrusion of the movable eccentric adjustment shim is embedded in the groove. The movable eccentric adjustment shim is in contact with the first nut.

6. The eccentric adjustment mechanism according to claim 4, characterized in that: The limiting adjustment rod includes a second screw and two second nuts. The two second nuts are respectively connected to the opposite ends of the second screw and can reciprocate along the second screw. The groove passes through the opposite ends of the second screw. The protrusions of the two movable eccentric adjustment shims are respectively embedded in the groove. The two movable eccentric adjustment shims are respectively in contact with the two second nuts.

7. The eccentric adjustment mechanism according to any one of claims 1 to 6, characterized in that: The eccentric limiting shim includes a base plate and sidewalls extending from opposite ends of the base plate, the base plate and the two sidewalls forming a groove; the waist-shaped hole is disposed on the base plate, and the eccentric adjusting shim is rotatably connected to the groove.

8. The eccentric adjustment mechanism according to claim 7, characterized in that: The substrate has reinforcing protrusions on both opposite sides.

9. A front double wishbone suspension, characterized in that, The front double wishbone suspension includes: a first longitudinal beam, an upper control arm assembly, and two eccentric adjustment mechanisms as described in any one of claims 1 to 8. The first longitudinal beam is provided with two sets of opposing and spaced-apart brackets. The opposite ends of the upper control arm assembly are respectively connected to the eccentric adjustment mechanisms and connected to the brackets through the eccentric adjustment mechanisms. The upper control arm assembly is provided with a first ball joint pin. The eccentric adjustment mechanisms can drive the upper control arm assembly to reciprocate along the height direction of the brackets to adjust the position of the first ball joint pin.

10. The front double wishbone suspension according to claim 9, characterized in that, Also includes: The front subframe assembly includes a second longitudinal beam and a lower control arm assembly respectively disposed on adjacent side surfaces of the front subframe assembly. The second longitudinal beam is opposite to and spaced apart from the first longitudinal beam. The lower control arm assembly is provided with a second ball joint pin. The line connecting the first ball joint pin and the second ball joint pin is the kingpin of the front suspension system.

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