Ball pin assembly, automobile stabilizer bar connecting rod assembly and automobile

Abstract

The utility model provides a ball pin assembly, an automobile stabilizer bar connecting rod assembly and an automobile, and relates to the technical field of automobile parts, the ball pin assembly comprises a ball head and a pin rod, the ball head is provided with a mounting cavity matched with one end of the pin rod, and the pin rod is embedded into the mounting cavity so as to be connected with the ball head. Compared with the mode that a ball head and a pin rod of a common ball pin are integrally formed through the same metal material and then subjected to precision machining, the ball pin assembly has the advantages that the pin rod and the ball head of the ball pin assembly can be formed separately and sequentially, and can be manufactured by selecting different materials and / or different machining technologies, for example, the pin rod and the ball head can be manufactured separately; the pin rod can be made of metal materials to meet the requirement for high strength of the pin rod, the ball head can be made of injection molding or 3D printing and other modes to meet the requirements for high precision and smoothness of the ball head, meanwhile, the machining difficulty is lowered, material waste and machining cost are reduced, and different use requirements of the ball head and the pin rod are better met.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a ball pin component, an automobile stabilizer bar connecting rod assembly and an automobile. Background Art

[0002] The automobile stabilizer bar is connected to the left and right steering knuckles through the stabilizer bar connecting rod assembly to meet the steering needs of the vehicle. The stabilizer bar connecting rod assembly usually includes a connecting rod and ball pins arranged at both ends of the connecting rod. The ball pin is an important component of the stabilizer bar connecting rod assembly and has an important influence on the performance of the stabilizer bar connecting rod assembly.

[0003] The existing ball pin includes a ball head and a pin rod. Since the ball head needs to have high precision and surface finish, and the pin rod needs to have high strength, in order to meet the high precision and finish requirements of the ball head and the strength required by the pin rod, a metal material is usually used for one-piece processing and then the ball head is precision machined. This not only makes the entire processing of the ball pin more difficult, but also generates a large amount of metal chips, resulting in a large waste of materials and high costs. Utility Model Content

[0004] The utility model aims to solve the technical problems of great difficulty and high cost in processing the existing ball pin.

[0005] In a first aspect, the utility model provides a ball and pin assembly, which is applied to an automobile stabilizer bar connecting rod assembly, and includes a ball head and a pin rod. The ball head is provided with an installation cavity matching one end of the pin rod, and the pin rod is embedded in the installation cavity to be connected with the ball head.

[0006] Optionally, one end of the pin rod for embedding in the installation cavity is provided with a connection reinforcement structure, and the connection reinforcement structure is a knurling, thread or toothed structure arranged on the circumferential side wall of the pin rod.

[0007] Optionally, the ball head is an injection molded structure.

[0008] Optionally, the wall thickness of the weakest part of the bottom of the installation cavity is greater than or equal to a preset value, and the preset value is 3-5 mm.

[0009] Optionally, the pin rod is provided with a limiting boss protruding radially along the pin rod on the circumferential side wall between its two ends, the ball head includes a head and a connecting part connected to each other, one end of the pin rod passes through the connecting part to extend into the head, and the limiting boss is used to abut against the end surface of the connecting part away from the head.

[0010] Optionally, the limiting boss separates the pin rod along its axial direction to form two rod segments, and the two rod segments have the same diameter.

[0011] Optionally, the ball and pin assembly also includes a ball socket and a dust cover, the head is rotatably disposed inside the ball socket, the connecting portion extends out of the ball socket from the opening of the ball socket, the dust cover is disposed around the opening of the ball socket, and one end is connected to the connecting portion through the first retaining spring, and the other end is connected to the ball socket.

[0012] Optionally, the ball and pin assembly also includes a first retaining spring, a flange is provided on the outer wall of one end of the connecting part close to the limiting boss, a first retaining groove is formed between the flange, the outer wall of the connecting part and the limiting boss, or a first retaining groove is provided on the outer wall of one end of the connecting part close to the limiting boss, and the dust cover is engaged with the first retaining groove through the first retaining spring.

[0013] In a second aspect, the utility model further provides an automobile stabilizer bar connecting rod assembly, comprising the above-mentioned ball pin assembly.

[0014] In a third aspect, the utility model further provides an automobile, comprising the above-mentioned automobile stabilizer bar connecting rod assembly.

[0015] The ball pin assembly, automobile stabilizer bar connecting rod assembly and automobile of the utility model have at least the following advantages compared with the prior art:

[0016] The pin of the ball pin assembly is embedded in the mounting cavity of the ball head, so that the pin and the ball head can be tightly connected together to achieve the function of an ordinary ball pin. In addition, compared with the ball head and the pin of an ordinary ball pin, which are integrally formed with the same metal material and then the ball head is precisely machined, since the pin and the ball head of the ball pin assembly can be formed separately, the two can be made of different materials and / or different processing techniques. For example, the pin can be made of metal materials to meet the high strength requirements of the pin, and the ball head can be made by injection molding or 3D printing to meet the high precision and smoothness requirements of the ball head, while reducing the processing difficulty, material waste and processing costs, so as to better take into account the different usage needs of the ball head and the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a ball pin assembly according to an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the pin rod of an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the partial structure of the ball pin assembly according to an embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1. Ball head; 11. Mounting cavity; 12. Head; 13. Connecting part; 131. Flange; 132. First slot; 2. Pin rod; 21. Position limiting boss; 22. Rod section; 221. Connection reinforcement structure; 3. Ball seat; 31. Seat body; 32. Seat cover; 4. Dust cover; 5. First retaining spring; 6. Second retaining spring. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "matched" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, it should be noted that in the description of the present invention, it should be noted that the terminology nouns in the various embodiments, such as "upper", "lower", "front", "back" and other words indicating directions, are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the components and devices referred to must be operated in accordance with the specific directions and specified operations and methods and structures in the specification. Such directional nouns do not constitute a limitation on the present invention.

[0025] The Z axis is established in this article, wherein the Z axis represents the up and down direction, the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom. It should also be noted that the aforementioned Z axis is only for the convenience of describing the present invention and simplifying the description, and does 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 cannot be understood as a limitation on the present invention.

[0026] like Figure 1-Figure 3 As shown, a ball and pin assembly of an embodiment of the utility model is applied to an automobile stabilizer bar connecting rod assembly, including a ball head 1 and a pin rod 2, wherein the ball head 1 is provided with a mounting cavity 11 matching one end of the pin rod 2, and the pin rod 2 is embedded in the mounting cavity 11 to be connected with the ball head 1.

[0027] Specifically, the pin rod 2 can be extended along the direction indicated by the Z axis, the ball head 1 is located below the pin rod 2, and a mounting cavity 11 with an opening facing upward is provided on the ball head 1, and the lower end of the pin rod 2 can be embedded in the mounting cavity 11 from the opening.

[0028] In this embodiment, the pin rod 2 of the ball pin assembly is embedded in the mounting cavity 11 of the ball head 1, so that the pin rod 2 and the ball head 1 can be tightly connected together to achieve the function of an ordinary ball pin. In addition, compared with the ordinary ball pin, the ball head 1 and the pin rod 2 are integrally formed with the same metal material and then the ball head 1 is precisely machined, because the pin rod 2 and the ball head 1 of the ball pin assembly can be formed separately, the two can be made of different materials and / or different processing techniques. For example, the pin rod 2 can be made of metal materials to meet the high strength requirements of the pin rod 2, and the ball head 1 can be processed by injection molding or 3D printing to meet the high precision and smoothness requirements of the ball head 1, while reducing the processing difficulty, reducing material waste and processing costs, so as to better take into account the different use needs of the ball head 1 and the pin rod 2.

[0029] Optionally, one end of the pin rod 2 for embedding in the installation cavity 11 is provided with a connection reinforcement structure 221 , and the connection reinforcement structure 221 is a knurled, threaded or toothed structure arranged on the circumferential side wall of the pin rod 2 .

[0030] In this embodiment, the connection reinforcement structure 221 on the pin rod 2 can increase the contact friction between the pin rod 2 and the ball head 1, and strengthen the connection strength between the pin rod 2 and the ball head 1. The connection reinforcement structure 221 adopts knurling, threading or toothed structure, and the processing and forming is relatively simple. For example, the knurling can be formed by knurling tools, the thread can be formed by machining methods such as pulling and milling, and the toothed structure can be formed by milling with a milling cutter or cold heading. On the premise of improving the bonding strength between the pin rod 2 and the ball head 1, the processing and manufacturing difficulty of the pin rod 2 is reduced.

[0031] Optionally, the ball head 1 is an injection molding structure.

[0032] In this embodiment, the ball head 1 is made of engineering plastic injection molding. Engineering plastics, such as polyoxymethylene plastic POM, have high strength and wear resistance, which can not only ensure the structural strength and performance stability of the ball head 1, but also reduce the material cost of the ball head 1 and reduce the weight.

[0033] After the pin rod 2 is processed, the pin rod 2 is placed in a mold and molten engineering plastic is poured to form a ball head 1 at one end of the pin rod 2. This not only simplifies the processing process of the ball head 1 and reduces the processing difficulty of the ball and pin assembly, but also the residual material in the injection molding process can be recycled and reused, with basically no material waste, which is more environmentally friendly and can achieve high-precision geometric shape replication at a lower cost.

[0034] The processing process of the existing integrated structure composed of a ball head and a pin rod is as follows: cold heading, tempering, shot blasting, precision turning of the pin rod, rough turning of the ball head, precision turning of the ball head, flaw detection, polishing of the ball head, thread rolling of the pin rod, surface treatment, inspection and packaging; while the processing process of the structure composed of the ball head and the pin rod of the present embodiment is as follows: cold heading of the pin rod, knurling, tempering, flaw detection, thread rolling, surface treatment, injection molding, inspection and packaging. It can be seen that the present embodiment adopts injection molding at one end of the pin rod 2 to form the ball head 1, which has simpler processing procedures, higher production efficiency and shorter production cycle.

[0035] Optionally, the wall thickness of the weakest part of the bottom of the installation cavity 11 is greater than or equal to a preset value, and the preset value is 3-5 mm.

[0036] Specifically, the weakest part of the bottom of the installation cavity 11, that is, the part with the thinnest wall thickness and which is most likely to allow the installation cavity 11 to penetrate; taking the pin rod 2 being arranged vertically and the ball head 1 being arranged at the bottom of the pin rod 2 as an example, the pin rod 2 can be cylindrical, and a cylindrical installation cavity 11 with an opening facing upward is arranged on the ball head 1. Since the bottom of the ball head 1 is a spherical surface, the wall thickness of the installation cavity 11 is inconsistent at various locations, that is, after the pin rod 2 is embedded in the installation cavity 11, the distances between various locations of the pin rod 2 and the outer surface of the ball head 1 are not equal. In order to avoid the end of the pin rod 2 extending into the ball head 1 protruding out of the ball head 1 due to wear of the ball head 1 during use, resulting in the ball and pin assembly being unable to be used normally, it is necessary to ensure that the ball head 1 has sufficient wear, and then, the wall thickness of the weakest part of the ball head 1 at the bottom of the installation cavity 11 is set to be greater than or equal to a preset value, or in other words, the distances between various locations of the pin rod 2 and the outer surface of the ball head 1 reach a preset value.

[0037] It should be noted that the preset value should not be too large, otherwise the connection stability between the pin rod 2 and the ball head 1 will be difficult to ensure due to insufficient insertion depth. Therefore, the preset value is 3-5 mm. When the wall thickness of the installation cavity 11 is greater than or equal to 3 mm, sufficient wear can be left for the ball head 1 while ensuring the connection stability between the pin rod 2 and the ball head 1, thereby extending the service life of the ball head 1 or the ball pin assembly.

[0038] like Figure 1-Figure 3 As shown, optionally, the pin rod 2 is provided with a limiting boss 21 protruding radially along the pin rod 2 on the circumferential side wall between its two ends, and the ball head 1 includes a head 12 and a connecting portion 13 connected to each other, one end of the pin rod 2 passes through the connecting portion 13 to extend into the head 12, and the limiting boss 21 is used to abut against the end surface of the connecting portion 13 away from the head 12.

[0039] In this embodiment, the head 12 and the connecting part 13 are integrally formed, the connecting part 13 is provided with a through hole, the head 12 is provided with a blind hole connected to the through hole, the through hole and the blind hole are connected to form the above-mentioned installation cavity 11, and a circular ring-shaped limiting boss 21 can be provided in the middle of the pin 2. When the pin 2 is embedded in the installation cavity 11, the limiting boss 21 can be used to abut against the end surface of the connecting part 13 to achieve assembly limiting of the two. The limiting boss 21 can also be used to limit other components connected to the pin 2.

[0040] like Figure 2 As shown, optionally, the limiting boss 21 separates the pin rod 2 along its axial direction to form two rod segments 22, and the two rod segments 22 have the same diameter.

[0041] Specifically, the pin 2 can be made of cold heading steel after quenching and tempering heat treatment, and has a high strength grade. A rod segment 22 of the pin 2 away from the ball head 1 can be provided with a connecting thread of M10, M12 or M14 specifications to connect with related parts and play the role of an ordinary ball pin; the rod segment 22 of the pin 2 embedded in the ball head 1 is provided with a connection reinforcement structure 221 for fastening with the ball head 1. The diameter of a rod segment 22 connected to the ball head 1 by the pin 2 can be flexibly selected according to the actual load conditions. Here, the diameters of the two rod segments 22 of the pin 2 on both sides of the limiting boss 21 are made the same or close, and close means roughly the same, allowing for the existence of processing errors. When the raw material of the pin 2 is placed in the mold, mechanical pressure can be used to squeeze from both ends to the middle at the same time, and the stress distribution is relatively uniform. It can be formed by cold heading once, which is convenient and efficient.

[0042] The end surface of the pin rod 2 away from the ball head 1 can be provided with a polygonal hole such as an inner hexagonal hole to facilitate the insertion of tools.

[0043] like Figure 1 As shown, optionally, the ball and pin assembly also includes a ball socket 3 and a dust cover 4, the head 12 is rotatably arranged inside the ball socket 3, the connecting portion 13 extends out of the opening of the ball socket 3, the dust cover 4 is arranged around the opening of the ball socket 3, and one end is connected to the connecting portion 13, and the other end is connected to the ball socket 3.

[0044] Specifically, the ball seat 3 may include a seat body 31 and a seat sleeve 32. The seat body 31 is provided with a placement cavity with an opening. The seat sleeve 32 is a sleeve structure. The seat sleeve 32 is sleeved on the outside of the seat body 31. The seat body 31 and the seat sleeve 32 are clamped and fixed. The head 12 of the ball head 1 extends into the placement cavity from the opening, and the connecting portion 13 of the ball head 1 extends out of the ball seat 3 from the opening. Lubricating oil can be filled between the ball head 1 and the seat body 31 to ensure that the ball head 1 can drive the pin rod 2 to rotate relative to the ball seat 3. A dust cover 4 is arranged between the open end of the ball seat 3 and the connecting portion 13. The two ends of the dust cover 4 are open. The two ends of the dust cover 4 are clamped with the connecting portion 13 and the seat sleeve 32 respectively to avoid leakage of lubricating oil in the ball seat 3, ensure the lubrication effect, and the service life and reliability of the ball pin assembly. The dust cover 4 adopts a flexible structure and will not interfere with the movement of the ball head 1, so that the ball head 1 can drive the pin rod 2 to rotate relative to the ball seat 3 at a preset angle.

[0045] like Figure 1 and Figure 3 As shown, optionally, the ball and pin assembly also includes a first retaining spring 5, a flange 131 is provided on the outer wall of one end of the connecting part 13 close to the limiting boss 21, and a first retaining groove 132 is formed between the flange 131, the outer wall of the connecting part 13 and the limiting boss 21, or a first retaining groove 132 is provided on the outer wall of one end of the connecting part 13 close to the limiting boss 21, and the dust cover 4 is clamped with the first retaining groove 132 through the first retaining spring 5.

[0046] Specifically, an annular flange 131 is provided at one end of the connection portion 13 close to the limiting boss 21, and a first clamping groove 132 is formed between the limiting boss 21 and the flange 131. The first clamping groove 132 is an annular clamping groove, and the first clamping spring 5 fixes the dust cover 4 in the first clamping groove 132. The first clamping groove 132 is used to limit the first clamping spring 5 to prevent the first clamping spring 5 from sliding axially along the pin 2, thereby ensuring the fixing effect of the first clamping spring 5 on the dust cover 4. The annular first clamping groove 132 is directly provided at one end of the connection portion 13 close to the limiting boss 21, and its function is similar to the above case, and will not be repeated.

[0047] In addition, the ball pin assembly may further include a second clamping spring 6, and a second clamping groove may be provided on the circumferential side wall of the ball seat 3 at one end of the opening, and the second clamping spring 6 fixes the dust cover 4 in the second clamping groove, and the second clamping groove is used to limit the second clamping spring 6 to prevent the second clamping spring 6 from sliding along the ball seat 3, thereby ensuring the fixing effect of the second clamping spring 6 on the dust cover 4. The size specifications of the first clamping spring 5 and the second clamping spring 6 can be different, and are selected according to the size of the clamping position.

[0048] Another embodiment of the utility model provides an automobile stabilizer bar connecting rod assembly, including a connecting rod and the above-mentioned ball pin assembly, two ball pin assemblies are respectively arranged at the two ends of the connecting rod, and the ball seat of the ball pin assembly is connected to the connecting rod. Compared with the prior art, the advantages of the automobile stabilizer bar connecting rod assembly are the same as those of the above-mentioned ball pin assembly, and will not be repeated.

[0049] Another embodiment of the present invention provides a car, comprising the above-mentioned car stabilizer bar connecting rod assembly. The advantages of the car compared with the prior art are the same as those of the above-mentioned car stabilizer bar connecting rod assembly, and the description thereof will not be repeated.

[0050] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A ball pin assembly, characterized in that: The invention is applied to a vehicle stabilizer bar connecting rod assembly, comprising a ball head (1) and a pin rod (2), wherein the ball head (1) is provided with a mounting cavity (11) matching one end of the pin rod (2), and the pin rod (2) is embedded in the mounting cavity (11) to be connected with the ball head (1).

2. The ball pin assembly according to claim 1, characterized in that: One end of the pin rod (2) used for embedding in the installation cavity (11) is provided with a connection reinforcement structure (221), and the connection reinforcement structure (221) is a knurled, threaded or toothed structure arranged on the circumferential side wall of the pin rod (2).

3. The ball and pin assembly according to claim 1, characterized in that: The ball head (1) is an injection-molded structure.

4. The ball and pin assembly according to claim 1, characterized in that: The wall thickness of the weakest part of the bottom of the installation cavity (11) is greater than or equal to a preset value, and the preset value is 3-5 mm.

5. The ball and pin assembly according to claim 1, characterized in that: The pin rod (2) is provided with a limiting boss (21) on a circumferential side wall between its two ends, the limiting boss (21) protruding radially along the pin rod (2), the ball head (1) comprises a head portion (12) and a connecting portion (13) connected to each other, one end of the pin rod (2) passes through the connecting portion (13) to extend into the head portion (12), and the limiting boss (21) is used to abut against the end surface of the connecting portion (13) away from the head portion (12).

6. The ball and pin assembly according to claim 5, characterized in that: The limiting boss (21) separates the pin rod (2) along its axial direction to form two rod sections (22), and the two rod sections (22) have the same diameter.

7. The ball and pin assembly according to claim 5, characterized in that: The invention also comprises a ball seat (3) and a dust cover (4), wherein the head (12) is rotatably arranged inside the ball seat (3), the connecting portion (13) extends out of the ball seat (3) from the opening of the ball seat (3), and the dust cover (4) is arranged around the opening of the ball seat (3), with one end connected to the connecting portion (13) and the other end connected to the ball seat (3).

8. The ball and pin assembly according to claim 7, characterized in that: The invention also comprises a first retaining spring (5); a flange (131) is provided on the outer wall of one end of the connecting portion (13) close to the limiting boss (21); a first retaining groove (132) is formed between the flange (131), the outer wall of the connecting portion (13) and the limiting boss (21); or a first retaining groove (132) is provided on the outer wall of one end of the connecting portion (13) close to the limiting boss (21); and the dust cover (4) is engaged with the first retaining groove (132) via the first retaining spring (5).

9. An automobile stabilizer bar connecting rod assembly, characterized in that: Comprising a ball and pin assembly as described in any one of claims 1-8.

10. An automobile, characterized in that: It comprises the automobile stabilizer bar connecting rod assembly as claimed in claim 9.

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