Ball pin, suspension control system and vehicle

Abstract

The utility model discloses a ball pin, a suspension control system and a vehicle, the ball pin is used for the suspension control system and comprises a ball pin, a pin shaft and a ball nut, and the ball pin is suitable for being clamped in a ball groove of a lower control arm of the suspension control system; one end of the pin shaft is connected with the ball pin, the pin shaft is suitable for being arranged in the steering knuckle in a penetrating mode, at least part of the pin shaft forms a matching part matched with the steering knuckle in the axial direction of the pin shaft, the peripheral wall of the matching part forms a conical surface, and the diameter of the matching part is gradually reduced in the direction from the ball pin to the pin shaft. The included angle between the peripheral wall of the matching part and the axis of the pin shaft is a, the friction self-locking angle between the matching part and the steering knuckle is b, and 2a is larger than or equal to b; the ball nut is connected with the pin shaft and suitable for being located on the side, away from the lower control arm, of the knuckle. According to the ball pin, the matching part can be prevented from being clamped in the steering knuckle when the ball pin is disassembled, and the ball pin is convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle suspension, in particular to a ball pin, a suspension control system and a vehicle. Background Art

[0002] In the prior art, when the ball nut is tightened, an axial force is generated, which generates a radial tension force to lock the ball pin. When the ball pin is removed, the mating part is stuck in the steering knuckle and cannot be easily removed, making it difficult to remove the ball pin. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a ball pin that can prevent the mating portion from being stuck in the steering knuckle when the ball pin is removed, making it easier to remove the ball pin.

[0004] The utility model also provides a suspension control system, which includes the above-mentioned ball pin.

[0005] The utility model also provides a vehicle, which includes the above-mentioned suspension control system.

[0006] According to the embodiment of the utility model, the ball pin is used for a suspension control system and includes a ball pin, a pin shaft and a ball nut, the ball pin is suitable for being clamped in the ball head groove of the lower control arm of the suspension control system; one end of the pin shaft is connected to the ball pin, and the pin shaft is suitable for being passed through the steering knuckle, and along the axial direction of the pin shaft, at least part of the pin shaft is formed as a fitting portion that fits with the steering knuckle, and the outer peripheral wall of the fitting portion is formed as a conical surface, and the diameter of the fitting portion gradually decreases in the direction from the ball pin to the pin shaft, and the angle between the outer peripheral wall of the fitting portion and the axis of the pin shaft is a, and the friction self-locking angle between the fitting portion and the steering knuckle is b, and it satisfies: 2a≥b; the ball nut is connected to the pin shaft and is suitable for being located on the side of the steering knuckle away from the lower control arm.

[0007] According to the embodiment of the present invention, the ball pin is clamped in the ball slot of the lower control arm of the suspension control system, one end of the pin shaft of the ball pin is connected to the ball pin, the ball nut is connected to the pin shaft and is located on the side of the steering knuckle facing away from the lower control arm, the pin shaft is inserted into the steering knuckle, and the outer peripheral wall of the mating portion that cooperates with the steering knuckle is formed into a conical surface along the axial direction of the pin shaft. The diameter of the mating portion gradually decreases in the direction from the ball pin to the pin shaft, and the angle a between the outer peripheral wall of the mating portion and the axis of the pin shaft and the friction self-locking angle b between the mating portion and the steering knuckle satisfy: 2a ≥ b. When the torque fluctuation caused by the ball pin being subjected to external impact stops, the steering knuckle and the mating portion will not lock, and the locking torque of the ball nut will return to its original state, reducing the axial force generated when tightening the ball nut, preventing the axial force from generating radial tension that causes the pin shaft to lock, and preventing the mating portion from getting stuck in the steering knuckle when the ball pin is removed, thereby facilitating the removal of the ball pin.

[0008] In addition, the ball pin according to the utility model may also have the following additional technical features:

[0009] In some embodiments of the present invention, the hardness H of the outer surface of at least part of the fitting portion satisfies: H≥25HRC.

[0010] In some embodiments of the present invention, the steering knuckle is an aluminum part, and the ball pin further includes: a tapered sleeve, which is arranged between the pin shaft and the steering knuckle.

[0011] In some embodiments of the present invention, a limiting boss extending along the circumferential direction of the tapered sleeve is provided on the outer peripheral wall of the tapered sleeve, and the limiting boss is located at one end of the tapered sleeve close to the ball pin. The surface of the limiting boss except the surface opposite to the ball pin is a spherical surface.

[0012] In some embodiments of the present invention, a limiting boss extending along the circumferential direction of the cone sleeve is provided on the outer peripheral wall of the cone sleeve, and the limiting boss is located at one end of the cone sleeve close to the ball pin. The limiting boss is arranged in parallel on two opposite surfaces in the axial direction of the cone sleeve and is perpendicular to the axis of the cone sleeve.

[0013] In some embodiments of the present invention, the cone sleeve is connected to the steering knuckle flange.

[0014] In some embodiments of the present invention, the outer peripheral wall of the cone sleeve is chrome-plated; or the outer peripheral wall of the cone sleeve is coated with grease.

[0015] In some embodiments of the present invention, a lubricating layer is provided on the outer surface of the ball stud.

[0016] According to an embodiment of the present invention, the suspension control system includes a steering knuckle, a lower control arm and the above-mentioned ball pin, wherein the lower control arm is provided with a ball head groove; the pin shaft is suitable for passing through the steering knuckle, and the ball head pin is suitable for being clamped in the ball head groove.

[0017] According to an embodiment of the present invention, a suspension control system is provided in which a ball pin is clamped in a ball slot of a lower control arm of the suspension control system, one end of the pin shaft of the ball pin is connected to the ball pin, a ball nut is connected to the pin shaft and is located on the side of the steering knuckle facing away from the lower control arm, the pin shaft is inserted into the steering knuckle, and the outer peripheral wall of a mating portion that mates with the steering knuckle forms a conical surface along the axial direction of the pin shaft. The diameter of the mating portion gradually decreases in the direction from the ball pin to the pin shaft, and the angle a between the outer peripheral wall of the mating portion and the axis of the pin shaft and the friction self-locking angle b between the mating portion and the steering knuckle satisfy the following conditions: 2a ≥ b. When the torque fluctuation caused by an external impact on the ball pin stops, the steering knuckle and the mating portion will not lock, and the locking torque of the ball nut will return to its original state, thereby reducing the axial force generated when tightening the ball nut, preventing the axial force from generating a radial tension force that locks the pin shaft, and preventing the mating portion from getting stuck in the steering knuckle when the ball pin is removed, thereby facilitating the removal of the ball pin.

[0018] A vehicle according to an embodiment of the present invention includes the above-mentioned suspension control system.

[0019] According to an embodiment of the present invention, a vehicle is provided with a ball stud secured within a ball stud slot of a lower control arm of a suspension control system, one end of the ball stud's pin shaft being connected to the ball stud, a ball nut being connected to the pin shaft and located on a side of the steering knuckle facing away from the lower control arm, the pin shaft being inserted into the steering knuckle, and an outer peripheral wall of a mating portion that mates with the steering knuckle forming a conical surface along the axial direction of the pin shaft. The diameter of the mating portion gradually decreases in the direction from the ball stud to the pin shaft, and an angle a between the outer peripheral wall of the mating portion and the axis of the pin shaft and a friction self-locking angle b between the mating portion and the steering knuckle satisfy the following conditions: 2a ≥ b. When the torque fluctuation caused by an external impact on the ball stud ceases, the steering knuckle and the mating portion will not lock, and the locking torque of the ball nut will return to its original state, thereby reducing the axial force generated when tightening the ball nut, preventing the axial force from generating a radial tension force that would lock the pin shaft, and preventing the mating portion from becoming stuck in the steering knuckle when the ball stud is removed, thereby facilitating removal of the ball stud.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1is a partial cross-sectional view of a suspension control system according to an embodiment of the present utility model;

[0023] Figure 2 is a partial cross-sectional view of a suspension control system according to another embodiment of the present utility model;

[0024] Figure 3 It is a partial cross-sectional view of a suspension control system according to another embodiment of the present utility model.

[0025] Reference numerals:

[0026] 100. Suspension control system;

[0027] 10. Ball pin;

[0028] 1. Ball stud; 11. Lubricating layer;

[0029] 2. Pin; 21. Matching part;

[0030] 3. Ball nut; 4. Taper sleeve; 41. Limiting boss;

[0031] 20. Steering knuckle;

[0032] 30. Lower control arm; 301. Ball head socket. DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0036] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] The ball pin 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0038] like Figure 1 As shown, the ball pin 10 according to the embodiment of the present invention includes a ball pin 1, a pin shaft 2 and a ball nut 3.

[0039] Specifically, the ball pin 10 is used in the suspension control system 100 . The ball pin 1 is suitable for being clamped in the ball slot 301 of the lower control arm 30 of the suspension control system 100 , and can transfer the kinetic energy of the lower control arm 30 of the suspension control system 100 to the ball pin 10 .

[0040] Furthermore, one end of the pin 2 is connected to the ball stud 1. The pin 2 is suitable for being inserted into the steering knuckle 20, and can transmit the kinetic energy on the lower control arm 30 of the suspension control system 100 to the steering knuckle 20. The large-scale front wheel steering and wheel up and down movement existing simultaneously between the lower control arm 30 and the steering knuckle 20 can be effectively transmitted through the ball stud 10. Along the axial direction of the pin 2 (such as Figure 1 In the first direction shown, at least a portion of the pin 2 forms a mating portion 21 that mates with the steering knuckle 20. The outer peripheral wall of the mating portion 21 is formed into a tapered surface. The diameter of the mating portion 21 gradually decreases in the direction from the ball pin 1 to the pin 2. During assembly, the tapered surface automatically adjusts to achieve the optimal mating position, thereby improving the assembly precision of the mating portion 21 and the steering knuckle 20. This tapered mating ensures a larger and more uniform contact area between the ball pin 10 and the steering knuckle 20, thereby increasing the stability and reliability of the connection.

[0041] As shown in the table below, the relationship between the surface friction coefficient between the mating portion 21 and the steering knuckle 20, the friction self-locking angle, the minimum taper ratio required for the sliding / stationary critical state, and the radial / axial force ratio between the ball pin 10 and the steering knuckle 20 is as follows: If the steering knuckle 20 and the mating portion 21 are in the critical friction self-locking state, the radial / axial force ratio generated by the torque during assembly of the ball nut 3 increases by nearly 2 times when the friction coefficient is 0.2 compared to the friction coefficient of 0.1.

[0042] Table 1. Surface friction coefficient-friction angle-minimum taper relationship

[0043]

[0044] Furthermore, the conical surface design allows for a more uniform stress distribution when the ball pin 10 is under load, thereby improving its load-bearing capacity. Even if the surface bending stress exceeds the yield strength, the ball pin 10 can continue to bear the load to a certain extent due to the self-centering and uniform contact characteristics of the conical surface. The ball nut 3 is connected to the pin 2 and is adapted to be located on the side of the steering knuckle 20 facing away from the lower control arm 30. The angle between the outer peripheral wall of the mating portion 21 and the axis of the pin 2 is a, and the friction self-locking angle between the mating portion 21 and the steering knuckle 20 is b, satisfying the following: 2a ≥ b. When the torque fluctuations caused by external impact on the ball pin 10 cease, the steering knuckle 20 and the mating portion 21 will not lock, and the locking torque of the ball nut 3 will return to its original state, reducing the axial force generated when tightening the ball nut 3, preventing the axial force from generating radial tension that would lock the pin 2, and preventing the mating portion 21 from becoming stuck in the steering knuckle 20 when the ball pin 10 is removed, thereby facilitating the removal of the ball pin 10.

[0045] According to the ball pin 10 of the embodiment of the present invention, by clamping the ball pin 1 in the ball head groove 301 of the lower control arm 30 of the suspension control system 100, one end of the pin shaft 2 of the ball pin 10 is connected to the ball pin 1, the ball nut 3 is connected to the pin shaft 2 and is located on the side of the steering knuckle 20 away from the lower control arm 30, the pin shaft 2 is passed through the steering knuckle 20, and along the axial direction of the pin shaft 2, the outer peripheral wall of the matching portion 21 that matches the steering knuckle 20 is formed into a conical surface. In the direction from the ball pin 1 to the pin shaft 2, the diameter of the matching portion 21 gradually decreases, and the angle a between the outer peripheral wall of the matching portion 21 and the axis of the pin shaft 2 and the friction self-locking angle b between the matching portion 21 and the steering knuckle 20 satisfy: 2a≥b. When the torque fluctuation caused by the external impact on the ball pin 10 stops, the steering knuckle 20 and the matching part 21 will not lock, and the locking torque of the ball nut 3 will return to its original state, reducing the axial force generated when tightening the ball nut 3, avoiding the axial force from generating radial tension to lock the pin shaft 2, and avoiding the matching part 21 from getting stuck in the steering knuckle 20 when the ball pin 10 is removed, thereby facilitating the removal of the ball pin 10.

[0046] In some embodiments of the present invention, the hardness H of the outer surface of at least a portion of the mating portion 21 satisfies the requirement H ≥ 25 HRC. It is understood that the hardness H of the outer surface of at least a portion of the mating portion 21 may be 25 HRC, 25.5 HRC, 26 HRC, 26.5 HRC, 27 HRC, 27.5 HRC, 28 HRC, 28.5 HRC, etc. The higher hardness of the outer surface of at least a portion of the mating portion 21 prevents damage such as burring of the outer surface of the mating portion 21 caused by surface pressure and friction during assembly, thereby preventing interference with disassembly of the ball pin 10.

[0047] In some embodiments of the present invention, the surface finish of at least part of the outer surface of the mating portion 21 and the inner surface of the steering knuckle 20 that cooperates therewith is relatively high, which can reduce the friction coefficient of the surface of the friction pair of the mating portion 21 and the steering knuckle 20, avoid the axial force of the ball nut 3 from generating a radial tensioning force to lock the pin shaft 2, and avoid the mating portion 21 from getting stuck in the steering knuckle 20 when the ball pin 10 is removed, thereby facilitating the removal of the ball pin 10.

[0048] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the steering knuckle 20 is an aluminum part, and the strength of the steering knuckle 20 is relatively low. The ball pin 10 also includes a tapered sleeve 4, which is arranged between the pin shaft 2 and the steering knuckle 20. The tapered sleeve 4 has a high strength, which prevents the radial tension force generated when the ball pin 10 is assembled from locking the pin shaft 2, and prevents the mating portion 21 from being stuck in the steering knuckle 20 when the ball pin 10 is disassembled, thereby facilitating the disassembly of the ball pin 10.

[0049] Further, if Figure 2 As shown, a limiting boss 41 extending along the circumferential direction of the tapered sleeve 4 is provided on the outer peripheral wall of the tapered sleeve 4. The limiting boss 41 is located at one end of the tapered sleeve 4 close to the ball stud 1. The surface of the limiting boss 41 except the surface opposite to the ball stud 1 is a spherical surface, which makes the cooperation between the tapered sleeve 4 and the steering knuckle 20 simpler and more convenient, and the spherical surface can provide a certain guiding effect, thereby increasing the reliability of the assembly of the ball stud 10 and the steering knuckle 20.

[0050] Further, if Figure 3 As shown, a limiting boss 41 extending along the circumferential direction of the tapered sleeve 4 is provided on the outer peripheral wall of the tapered sleeve 4, and the limiting boss 41 is located at one end of the tapered sleeve 4 close to the ball stud 1. The limiting boss 41 is arranged in parallel on two opposite surfaces in the axial direction of the tapered sleeve 4 and is perpendicular to the axis of the tapered sleeve 4, so that the cooperation between the tapered sleeve 4 and the steering knuckle 20 is relatively simple and convenient, and the limiting boss 41 can provide a certain limiting effect, so that the position of the ball stud 10 and the steering knuckle 20 during assembly is more reliable.

[0051] In some embodiments of the present invention, the cone sleeve 4 is flange-connected to the steering knuckle 20. The flange connection can adapt to the connection requirements of various materials, has high flexibility, and ensures a firm connection between the cone sleeve 4 and the steering knuckle 20. It can maintain stability and reliability even in harsh working environments, thereby increasing the safety of the vehicle.

[0052] In some embodiments of the present invention, the outer wall of the cone sleeve 4 is chrome-plated or coated with grease. This can improve the surface finish of the fitting area between the cone sleeve 4 and the steering knuckle 20 while avoiding affecting the friction coefficient between the cone sleeve 4 and the steering knuckle 20.

[0053] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the outer surface of the ball stud 1 is provided with a lubricating layer 11 , which can reduce the friction between the lower control arm 30 and the ball stud 1 and prevent the ball stud 1 or the lower control arm 30 from being damaged.

[0054] In some embodiments of the present invention, the fitting portion 21 is located close to the force center of the ball pin 10 , thereby reducing force (or torque) instability caused by lateral forces during assembly of the ball pin 10 and increasing the reliability of the ball pin 10 .

[0055] The present invention also provides a suspension control system 100 having the ball pin 10 of the above embodiment.

[0056] like Figure 1 As shown, the suspension control system 100 according to the embodiment of the present invention includes a steering knuckle 20 , a lower control arm 30 and the aforementioned ball pin 10 .

[0057] Specifically, the lower control arm 30 is provided with a ball head groove 301 , which provides an installation space for the ball pin 10 .

[0058] Furthermore, the pin shaft 2 is adapted to be inserted into the steering knuckle 20, and the ball stud 1 is adapted to be locked in the ball stud groove 301. This allows the kinetic energy of the lower control arm 30 of the suspension control system 100 to be transferred to the steering knuckle 20. The large-scale front wheel steering and wheel up-and-down motion occurring simultaneously between the lower control arm 30 and the steering knuckle 20 can be effectively transmitted through the ball stud 10.

[0059] According to the suspension control system 100 of the embodiment of the present utility model, the above-mentioned ball pin 10 is provided, and the ball pin 1 is clamped in the ball head groove 301 of the lower control arm 30 of the suspension control system 100. One end of the pin shaft 2 of the ball pin 10 is connected to the ball pin 1, and the ball nut 3 is connected to the pin shaft 2 and is located on the side of the steering knuckle 20 away from the lower control arm 30. The pin shaft 2 is passed through the steering knuckle 20, and along the axial direction of the pin shaft 2, the outer peripheral wall of the matching portion 21 that matches the steering knuckle 20 is formed into a conical surface. In the direction from the ball pin 1 to the pin shaft 2, the diameter of the matching portion 21 gradually decreases, and the angle a between the outer peripheral wall of the matching portion 21 and the axis of the pin shaft 2 and the friction self-locking angle b between the matching portion 21 and the steering knuckle 20 satisfy: 2a≥b. When the torque fluctuation caused by the external impact on the ball pin 10 stops, the steering knuckle 20 and the matching part 21 will not lock, and the locking torque of the ball nut 3 will return to its original state, reducing the axial force generated when tightening the ball nut 3, avoiding the axial force from generating radial tension to lock the pin shaft 2, and avoiding the matching part 21 from getting stuck in the steering knuckle 20 when the ball pin 10 is removed, thereby facilitating the removal of the ball pin 10.

[0060] The present invention also provides a vehicle having the suspension control system 100 of the above embodiment.

[0061] The vehicle according to the embodiment of the present invention includes the suspension control system 100 described above.

[0062] According to the vehicle of the embodiment of the present utility model, the suspension control system 100 mentioned above is provided, and the ball pin 1 is clamped in the ball slot 301 of the lower control arm 30 of the suspension control system 100. One end of the pin shaft 2 of the ball pin 10 is connected to the ball pin 1, and the ball nut 3 is connected to the pin shaft 2 and is located on the side of the steering knuckle 20 away from the lower control arm 30. The pin shaft 2 is passed through the steering knuckle 20, and along the axial direction of the pin shaft 2, the outer peripheral wall of the matching portion 21 that matches the steering knuckle 20 is formed into a conical surface. In the direction from the ball pin 1 to the pin shaft 2, the diameter of the matching portion 21 gradually decreases, and the angle a between the outer peripheral wall of the matching portion 21 and the axis of the pin shaft 2 and the friction self-locking angle b between the matching portion 21 and the steering knuckle 20 satisfy: 2a≥b. When the torque fluctuation caused by the external impact on the ball pin 10 stops, the steering knuckle 20 and the matching part 21 will not lock, and the locking torque of the ball nut 3 will return to its original state, reducing the axial force generated when tightening the ball nut 3, avoiding the axial force from generating radial tension to lock the pin shaft 2, and avoiding the matching part 21 from getting stuck in the steering knuckle 20 when the ball pin 10 is removed, thereby facilitating the removal of the ball pin 10.

[0063] The ball pin 10 , the suspension control system 100 and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0065] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A ball pin, characterized in that: For use in suspension control systems and including: a ball stud adapted to be clamped in a ball stud slot of a lower control arm of the suspension control system; A pin shaft, one end of which is connected to the ball stud, the pin shaft being adapted to be inserted into a steering knuckle, at least a portion of the pin shaft forming a mating portion mating with the steering knuckle along the axial direction of the pin shaft, the outer peripheral wall of the mating portion being formed into a conical surface, the diameter of the mating portion gradually decreasing in the direction from the ball stud to the pin shaft, the angle between the outer peripheral wall of the mating portion and the axis of the pin shaft being a, the friction self-locking angle between the mating portion and the steering knuckle being b, and satisfying the following: 2a ≥ b; A ball nut is connected to the pin shaft and is suitable for being located on a side of the steering knuckle away from the lower control arm.

2. The ball pin according to claim 1, characterized in that: The hardness H of the outer surface of at least part of the fitting portion satisfies: H≥25HRC.

3. The ball pin according to claim 1, characterized in that: The steering knuckle is an aluminum part, and the ball pin also includes: A tapered sleeve is provided between the pin and the steering knuckle.

4. The ball pin according to claim 3, characterized in that: A limiting boss extending along the circumferential direction of the tapered sleeve is provided on the outer peripheral wall of the tapered sleeve. The limiting boss is located at one end of the tapered sleeve close to the ball stud. The surface of the limiting boss except the surface opposite to the ball stud is a spherical surface.

5. The ball pin according to claim 3, characterized in that: A limiting boss extending along the circumferential direction of the cone sleeve is provided on the outer peripheral wall of the cone sleeve. The limiting boss is located at one end of the cone sleeve close to the ball pin. The limiting boss is arranged in parallel on two opposite surfaces in the axial direction of the cone sleeve and is perpendicular to the axis of the cone sleeve.

6. The ball pin according to claim 3, characterized in that: The cone sleeve is connected to the steering knuckle flange.

7. The ball pin according to claim 3, characterized in that: A chrome-plated layer on the outer peripheral wall of the cone sleeve; Alternatively, the outer peripheral wall of the cone sleeve is coated with grease.

8. The ball pin according to claim 1, wherein: The outer surface of the ball stud is provided with a lubricating layer.

9. A suspension control system, characterized in that: include: Steering knuckle; a lower control arm, wherein the lower control arm is provided with a ball head slot; According to the ball pin according to any one of claims 1 to 8, the pin shaft is suitable for passing through the steering knuckle, and the ball stud is suitable for being clamped in the ball stud groove.

10. A vehicle, characterized in that: include: The suspension control system according to claim 9.

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