Ball pin assembly with high friction coefficient at joint with automobile swing arm

Abstract

The utility model discloses a ball pin assembly with a high friction coefficient at the joint with a swing arm of an automobile, which comprises a ball cup, a ball pin, a ball pin, a ball pin, a ball pin, a ball pin, a ball pin and a ball pin, and the upper surface of the ball cup is provided with a connecting hole for being connected with the swing arm; grooves are evenly distributed in the outer edge of the connecting hole, and anti-skid protrusions protruding out of the upper surfaces of the grooves are arranged in the grooves. Hardened layers are arranged on the outer surfaces of the anti-skid bulges and the upper surface of the ball cup; after the lower ball pin and the control arm are assembled, the friction coefficient is larger than or equal to 0.35, based on the matched design of the protruding points and the hardened layer, the protruding points are embedded into the forged steel piece, friction force is increased, meanwhile, the hardness and strength of the protruding points are further improved based on the hardened layer, the higher friction force requirement can be met, and the service life of the lower ball pin is prolonged. And the installation requirements of two different triangular arms of a stamping steel plate and a forged steel arm body can be met at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile parts, in particular to a ball pin assembly with high friction coefficient at the connecting place of automobile swing arm. BACKGROUND

[0002] In modern automobile design, the steering transmission mechanism as the key component connecting the driver's intention and the steering action of the wheels, its performance is directly related to the vehicle's handling stability, safety and ride comfort; during the driving process, the steering transmission mechanism not only transmits the steering force exerted by the driver through the steering wheel, but also needs to withstand the impact and vibration caused by road unevenness; these external factors often pose a severe challenge to the reliability and durability of the steering mechanism.

[0003] In order to cope with these challenges, a vibration absorbing and buffering device is usually integrated into the steering mechanism, aiming to absorb and alleviate the vibration and impact caused by road unevenness, to protect the various components of the steering system from damage; at the same time, considering the gap problem caused by wear and tear during long-term use, the steering mechanism also needs to have an automatic adjustment function to ensure the accuracy and stability of the steering action.

[0004] In the complex structure of the steering transmission mechanism, the relative motion of the steering swing arm and the steering knuckle arm is particularly critical; as their motion is not in the same plane, the traditional planar coupling method cannot meet the motion requirements, so the spherical hinge coupling is generally adopted; this coupling method allows the relative motion of the two components in multiple directions, effectively avoiding motion interference, ensuring the flexibility and reliability of the steering mechanism.

[0005] However, although the spherical hinge coupling has significant technical advantages, it also exposes some problems in practical application; the existing automobile steering ball pin is usually composed of a ball head seat, a ball head and a dust cover, wherein the ball head seat is fixedly connected to the swing arm by bolts; the swing arm as an important component in the steering mechanism, bears the functions of support, guidance and bearing force in all directions during starting, braking and turning; however, during the automobile motion process, especially when experiencing complex road conditions and frequent steering operations, the bolts fixing the ball head seat are prone to loosen due to uneven force or long-term vibration; the loosening of the bolts not only causes unstable connection between the ball head seat and the swing arm, but also affects the overall rigidity and precision of the steering mechanism.

[0006] Therefore, how to improve the connection stability between the ball pin and the swing arm has become a technical problem to be solved in the current automobile steering system design field. UTILITY MODEL CONTENTS

[0007] The utility model discloses a ball pin assembly with high friction coefficient at the connecting position of automobile swing arm, which solves the above-mentioned problems in the prior art.

[0008] To solve the above technical problems, one technical scheme of the utility model is to provide a ball pin assembly with high friction coefficient at the connecting position of automobile swing arm, which comprises:

[0009] A ball head seat is provided with a connecting hole on the upper surface for connecting with the automobile swing arm;

[0010] The outer edge of the connecting hole is uniformly provided with a groove, and the groove is provided with an anti-skid protrusion protruding from the upper surface of the groove;

[0011] The outer surface of the anti-skid protrusion and the upper surface of the ball head seat are both provided with a hardening layer.

[0012] As an improved scheme, the upper surface of the ball head seat is further provided with a boss;

[0013] The upper surface of the boss is higher than the ball head seat, and the boss is arranged in a circular ring around the connecting hole, and the connecting hole is located at the center of the boss.

[0014] As an improved scheme, the upper surface of the boss is provided with the groove at the outer edge of the connecting hole.

[0015] As an improved scheme, the upper surface of the boss is provided with the hardening layer.

[0016] As an improved scheme, the number of connecting holes comprises three.

[0017] The three connecting holes are distributed in a triangular manner on the ball head seat.

[0018] As an improved scheme, the number of grooves corresponding to each connecting hole comprises five.

[0019] Each groove is circularly arranged, and five grooves are uniformly arranged around the corresponding connecting hole.

[0020] As an improved scheme, the hardening layer comprises a quenching layer.

[0021] As an improved scheme, the hardening layer further comprises a carburizing layer.

[0022] As an improved scheme, the hardening layer further comprises a nitriding treatment layer.

[0023] As an improved scheme, the hardening layer further comprises a carbonitriding layer.

[0024] The ball pin assembly with high friction coefficient at the connection with the automobile swing arm has the advantages that after the lower ball pin is assembled with the control arm, the friction coefficient is greater than or equal to 0.35, the convex point is embedded in the forged steel part based on the cooperation design of the convex point and the hardening layer, the friction force is increased, the hardness and strength of the convex point are further improved based on the hardening layer, the higher friction force requirement can be met, and the installation requirements of the stamping steel plate and the forged steel arm body of two different triangular arms can be met at the same time.

[0025] The ball pin assembly with high friction coefficient at the connection with the automobile swing arm can make the lower ball pin and the control arm assemble, the friction coefficient is greater than or equal to 0.35, based on the cooperation design of the convex point and the hardening layer, the convex point is embedded in the forged steel part, the friction force is increased, and the hardness and strength of the convex point are further improved based on the hardening layer, not only the higher friction force requirement can be met, but also the installation requirements of the stamping steel plate and the forged steel arm body of two different triangular arms can be met at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a top view structural schematic diagram of the ball pin assembly with high friction coefficient at the connection with the automobile swing arm in the embodiment of the utility model;

[0027] Figure 2 is a side view structural schematic diagram of the ball pin assembly with high friction coefficient at the connection with the automobile swing arm in the embodiment of the utility model;

[0028] The marks of various components in the drawings are as follows:

[0029] 1, ball head seat;2, connecting hole;3, groove;4, anti-skid convex;5, hardening layer;6, convex table. DETAILED DESCRIPTION

[0030] The preferred embodiments of the utility model are described in detail below in combination with the drawings, so that the advantages and characteristics of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0031] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0032] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply any relative importance or an ordering of importance. Thus, a feature defined with a "first", "second", etc. can include at least one of the features, explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0035] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and are not the only embodiment.

[0036] Please refer to Figure 1 and Figure 2 The embodiment of the present application comprises:

[0037] A ball pin assembly with high friction coefficient at the connecting part of the automobile swing arm, comprising: a ball head seat 1, the ball head seat 1 is provided with a boss 6, and a connecting hole 2 is located at the center position of the boss 6;

[0038] Specifically, the number of connecting holes 2 is three, and the three connecting holes 2 are distributed in a triangular manner, so that three points determine a plane, thereby ensuring the stability of the connection between the ball head seat 1 and the automobile swing arm.

[0039] Specifically, since there are three connecting holes 2, three corresponding bosses 6 are provided; each boss 6 is annularly arranged around the connecting hole 2, and the upper surface of each boss 6 is higher than the upper surface of the ball head seat 1; a groove 3 is formed in the outer edge of each boss 6 around the connecting hole 2; each boss 6 is provided with five grooves 3, and the five grooves 3 are uniformly arranged around the connecting hole 2.

[0040] Specifically, each groove 3 is circular, and a anti-skid protrusion 4 protruding from the upper surface of the groove 3 is arranged in each groove 3; the anti-skid protrusion 4 is semispherical, and the semispherical anti-skid protrusion 4 has a uniform arc surface, so that it can withstand a larger force and has a higher strength; it should be noted that the friction coefficient refers to the ratio of the friction force between two surfaces and the vertical force acting on one of the surfaces, that is, the friction coefficient = friction force / vertical force; the friction coefficient is related to the roughness of the surface and is independent of the size of the contact area; since the bolt tightening torque is fixed, that is, the vertical force is fixed, under the condition of fixed bolt tightening force, increasing the friction force can increase the friction coefficient; however, since the triangular arm surface is fixed, the roughness cannot be increased, therefore, the application adopts the "nail embedding" method to increase the friction force between the lower ball pin and the triangular arm assembly surface, and the anti-skid protrusion 4 described above is the "nail", which is vertically arranged as a "nail", and the anti-skid protrusion 4 can be embedded into the arm body to a certain depth when the ball pin is connected with the swing arm, and has a certain strength.

[0041] Specifically, in order to cooperate with the design of the above-mentioned "nail" structure and further improve the hardness and strength of the protrusion, the application adopts a treatment method of increasing a hardening layer 5 on the surface of the protrusion and the ball head seat 1, thereby meeting the embedding requirement between the ball pin and the arm body, so as to meet the requirement of increasing the friction force; wherein the hardening layer 5 includes: increasing quenching treatment on the surface of the protrusion and the ball head seat 1 to form a quenching layer, increasing carburizing treatment on the surface of the protrusion and the ball head seat 1 to form a carburizing layer, increasing nitriding treatment on the surface of the protrusion and the ball head seat 1 to form a nitriding layer, and increasing carbonitriding treatment on the surface of the protrusion and the ball head seat 1 to form a carbonitriding layer; wherein the hardness of the shell material of the application is the same as that of the forged triangular arm, and is slightly higher than that of the stamped triangular arm.

[0042] In summary, after the lower ball pin is assembled with the control arm, the friction coefficient is greater than or equal to 0.35, based on the cooperation design of the protrusion and the hardening layer 5, the protrusion is embedded in the forged steel part to increase the friction force, and based on the hardening layer 5, the hardness and strength of the protrusion are further improved, which not only meets the higher friction force requirement, but also meets the installation requirements of both stamped steel plates and forged arm bodies of two different triangular arms.

[0043] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or direct or indirect application in other related technical fields based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A ball stud assembly having a high coefficient of friction at the connection with the swing arm of a vehicle, characterized in that, Include: Ball head seat (1), the upper surface of the ball head seat (1) is provided with a connecting hole (2) for connecting with the automobile swing arm; The outer edge of the connecting hole (2) is uniformly distributed with a groove (3), and the groove (3) is provided with an anti-skid convex (4) protruding from the upper surface of the groove (3); The outer surface of the anti-skid convex (4) and the upper surface of the ball head seat (1) are provided with a hardening layer (5).

2. The ball pin assembly with high friction coefficient at the connection with the automobile swing arm according to claim 1, wherein: The upper surface of the ball head seat (1) is further provided with a boss (6); The upper surface of the boss (6) is higher than the ball head seat (1), and the boss (6) is arranged in a circular ring around the connecting hole (2), and the connecting hole (2) is located at the center of the boss (6).

3. The ball pin assembly with high friction coefficient at the connection with the automobile swing arm according to claim 2, wherein: The upper surface of the boss (6) is provided with the groove (3) around the outer edge of the connecting hole (2).

4. The ball pin assembly with high friction coefficient at the connection with the automobile swing arm according to claim 2, wherein: The upper surface of the boss (6) is provided with the hardening layer (5).

5. The ball pin assembly with high friction coefficient at the connection with the automobile swing arm according to claim 3, wherein: The number of connecting holes (2) includes three; Three connecting holes (2) are distributed in a triangular manner on the ball head seat (1).

6. The ball pin assembly with high friction coefficient at the connection with the automobile swing arm according to claim 5, wherein: The number of grooves (3) corresponding to each connecting hole (2) includes five; Each groove (3) is circularly arranged, and five grooves (3) are uniformly arranged around the corresponding connecting hole (2).

7. The ball pin assembly with high friction coefficient at the connection with the automobile swing arm according to claim 1, wherein: The hardening layer (5) includes a quenching layer.

8. The ball pin assembly with high friction coefficient at the connection with the automobile swing arm according to claim 1, wherein: The hardening layer (5) further includes a carburizing layer.

9. The ball pin assembly with high friction coefficient at the connection with the automobile swing arm according to claim 1, wherein: The hardening layer (5) further includes a nitriding treatment layer.

10. The ball pin assembly with high friction coefficient at the connection with the automobile swing arm according to claim 1, wherein: The hardening layer (5) further includes a carbonitriding layer.

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