Ball head assembly

Abstract

The utility model provides a ball head assembly, and belongs to the technical field of automobile accessories. The problem that a protective cover of an existing ball head assembly is difficult to disassemble is solved. The ball head assembly comprises a ball head shell and a ball head pin inserted in the ball head shell, a rod portion of the ball head pin extends out of the upper end of the ball head shell, a dust cover is connected between the rod portion of the ball head pin and the ball head shell, the outer side of the dust cover is sleeved with a barrel-shaped protective cover, and the rod portion of the ball head pin is provided with an assembling section extending out of the dust cover and located in the protective cover. A plurality of elastic pieces which are evenly arranged in the circumferential direction and separately arranged are arranged on the inner side face of the upper end of the protective cover, one circumferential end of each elastic piece is connected with the protective cover, the other circumferential end of each elastic piece is arranged in a suspended mode, and the inner side face of each elastic piece is a plane. And the middle part of the inner side surface of each elastic sheet is in contact with the outer side surface of the assembly section, so that the elastic sheet is elastically propped against the assembly section. According to the ball head assembly, the protective cover is labor-saving to disassemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories and relates to a ball head assembly. Background Art

[0002] Suspension is the general term for the force transmission connection device between the wheels and the body of a car, including elastic elements, shock absorbers and force transmission devices, which play the role of buffering, vibration reduction and force transmission respectively. The force transmission device includes several force transmission components, namely control arms, tie rods and stabilizer bars. In order to achieve the connection of various force transmission components, ball head assemblies and / or bushing assemblies are generally installed on control arms, tie rods and stabilizer bars.

[0003] For example, the multi-angle rotating impact-resistant swing arm [application number: CN202122013700.2; announcement number: CN215705521 U] proposed in the Chinese patent literature includes a swing arm body, a ball head assembly is provided on the top of the swing arm body, and a middle rubber bushing and a rear rubber bushing are provided at both ends of the bottom of the swing arm body. Among them, the ball head assembly includes an oil nozzle, a ball head cover, a butterfly spring, a ball head shell, a lower ball seat, an upper ball seat, a ball head pin, a dust cover and a protective cover. The upper ball seat, the lower ball seat and the ball head cover are all fixedly connected to the ball head shell, the head of the ball head pin is embedded between the upper ball seat and the lower ball seat, the butterfly spring is installed between the lower ball seat and the ball head cover, the oil nozzle is detachably fixed to the ball head cover, the oil nozzle is connected to the head of the ball head pin, the rod of the ball head pin extends out of the ball head shell, the dust cover is connected between the ball head shell and the rod of the ball head pin, and the protective cover is sleeved on the outside of the dust cover. The rod of the ball stud has an assembly section extending out of the dust cover and located in the protective cover. The assembly section is used to connect with other force transmission components. The outer side surface of the assembly section is an assembly surface, and a groove is arranged on the assembly surface.

[0004] The function of the protective cover is to protect the dust cover and the assembly section, and to prevent the dust cover and the assembly section from being bumped or scratched before the whole vehicle is assembled. In order to prevent the protective cover from falling off the rod of the ball stud and to ensure the protective function of the protective cover, a ring-shaped snap ring corresponding to the groove is provided on the inner side of the protective cover in the above-mentioned ball head assembly, and the snap ring is snapped into the groove. However, in this way, when the protective cover needs to be removed from the ball head assembly for whole vehicle assembly, since the snap ring and the groove form a snap connection structure, the snap ring needs to be deformed before the protective cover can be removed, that is, it is necessary to overcome the deformation resistance of the snap ring from the groove and the friction resistance of the snap ring in contact with the assembly section after deformation, which makes it more difficult to remove the protective cover. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a ball head assembly, which solves the technical problem of how to make the removal of the protective cover labor-saving.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] Ball head assembly, including a ball head housing and a ball head pin inserted into the ball head housing. The rod portion of the ball head pin extends out from the upper end of the ball head housing, and a dust cover is connected between the rod portion of the ball head pin and the ball head housing. A cylindrical protective cover is sleeved on the outer side of the dust cover. An assembly section that extends out of the dust cover and is located inside the protective cover is provided on the rod portion of the ball head pin. It is characterized in that several elastic pieces are arranged on the inner side surface of the upper end of the protective cover in a circumferentially uniform and separated manner. One circumferential end of each elastic piece is connected to the protective cover, and the other circumferential end of each elastic piece is suspended. The inner side surface of each elastic piece is a plane, and the middle of the inner side surface of each elastic piece contacts the outer side surface of the assembly section, so that the elastic piece elastically abuts against the assembly section.

[0008] When installing the protective cover, sleeve the protective cover onto the ball head pin, and then press or push the protective cover towards the ball head housing, so that the assembly section is inserted between these elastic pieces. The middle of the inner side surface of the elastic piece contacts the outer side surface of the assembly section, so that the elastic piece elastically abuts against the assembly section. Thus, the assembly section is held by several elastic pieces, and the protective cover is fixed on the ball head pin. When disassembling the protective cover, pull or push the protective cover in the direction away from the ball head housing, so that the elastic piece disengages from the assembly section, and then remove the protective cover from the ball head pin.

[0009] Compared with the existing snap structure, in this ball head assembly, the protective cover is fixed by elastic pieces. When disassembling, only the frictional resistance between the elastic piece and the assembly section needs to be overcome, and there is no need to overcome the deformation resistance for the snap ring to disengage from the groove, making it labor-saving to disassemble the protective cover. Moreover, since one circumferential end of each elastic piece is connected to the protective cover, the other circumferential end of each elastic piece is suspended, the inner side surface of each elastic piece is a plane, and the middle of the inner side surface of each elastic piece contacts the outer side surface of the assembly section, so that the elastic piece elastically abuts against the assembly section, a line contact can be formed between the elastic piece and the outer side surface of the assembly section. In this way, the frictional resistance between the elastic piece and the assembly section during disassembly can also be reduced. Therefore, this ball head assembly makes it labor-saving to disassemble the protective cover.

[0010] In the above ball head assembly, a chamfer is provided between the outer side surface of the ball head pin and the upper end surface of the ball head pin. The circumferential end of the elastic piece connected to the protective cover is the connecting end, the circumferential end of the elastic piece with a suspended setting is the suspended end. The lower side surface of the elastic piece is inclined upward along the direction from the connecting end to the suspended end, and the inclination angle of the lower side surface of the elastic piece gradually increases along the direction from the connecting end to the suspended end.

[0011] The inclined setting of the elastic sheet can, on the one hand, ensure that the connection end and the protective cover have sufficient connection length, and ensure the stability of the connection structure at the connection end; on the other hand, in conjunction with the chamfer at the upper end of the ball pin, it can produce a guiding effect when installing the protective cover, making it easier for the assembly section of the ball pin to be inserted between these elastic sheets, which is conducive to facilitating the installation of the protective cover. At the same time, it can also reduce the contact area between the elastic sheet and the assembly section, making it easier to disassemble the protective cover.

[0012] In the ball head assembly, the lower side of the elastic sheet and the inner side of the elastic sheet form an arc transition, which can reduce the jamming when installing the protective cover, thus facilitating the installation of the protective cover.

[0013] In the above ball head assembly, the outer side surface of the upper end of the protective cover has a protruding annular upper convex ring. The upper convex ring can not only improve the structural strength of the upper end of the protective cover and stabilize the protective cover structure, but also provide a fulcrum for the removal of the protective cover, making the removal of the protective cover convenient and labor-saving.

[0014] In the above ball head assembly, the upper end surface of the upper convex ring is flush with the upper end surface of the protective cover. After the protective cover is mounted on the ball head pin, the protective cover can be installed in place by pressing the upper end surface of the protective cover. The upper end surface of the upper convex ring is flush with the upper end surface of the protective cover, which increases the contact surface area of the protective cover when pressed, making it easy to install the protective cover. At the same time, such a setting will not prevent the upper convex ring from serving as a fulcrum when the protective cover is removed, making it easy to remove the protective cover.

[0015] In the above ball head assembly, the outer side surface of the lower end of the protective cover has a protruding annular lower convex ring. The lower convex ring can not only improve the structural strength of the lower end of the protective cover and stabilize the protective cover structure, but also provide a fulcrum for the removal and installation of the protective cover, making the removal and installation of the protective cover convenient.

[0016] In the above ball head assembly, the outer side of the ball head shell has a protruding connection handle, which is not only used to connect with the control arm, tie rod or stabilizer bar, but also provides a fulcrum for holding the ball head shell when disassembling the protective cover, thereby facilitating the disassembly of the protective cover.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The ball head assembly fixes the protective cover through the elastic sheet. When disassembling, it only needs to overcome the friction resistance between the elastic sheet and the assembly section, and does not need to overcome the deformation resistance that causes the snap ring to escape from the groove, which saves effort when disassembling the protective cover. In addition, the elastic sheet and the outer side surface of the assembly section are in line contact, which can also reduce the friction resistance between the elastic sheet and the assembly section during disassembly. Therefore, compared with the prior art, the protective cover of the ball head assembly is easier to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the top view of the ball head assembly.

[0020] Figure 2 is Figure 1 the sectional view in the A-A direction in

[0021] Figure 3 is Figure 2 the partial view in the B direction in

[0022] Figure 4 is the sectional view of the protective cover in the ball head assembly.

[0023] In the figure, 1. ball head shell; 1a. connecting handle; 2. ball head seat; 3. disc spring; 4. baffle; 5. grease nipple; 6. ball head pin; 6a. assembly section; 6b. chamfer; 7. dust cover; 8. protective cover; 8a. elastic piece; 8a1. connecting end; 8a2. suspended end; 8b. upper convex ring; 8c. lower convex ring. Detailed implementation manners

[0024] The following are specific embodiments of the present utility model and in combination with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0025] As Figure 1 and Figure 2 shown, a ball head assembly includes a ball head shell 1, a ball head seat 2, a disc spring 3, a baffle 4, a grease nipple 5, a ball head pin 6, a dust cover 7 and a protective cover 8. The ball head seat 2 is fixed in the ball head shell 1, the baffle 4 is fixed in the ball head shell 1 and is located below the ball head seat 2, the grease nipple 5 is fixedly connected to the baffle 4, and the disc spring 3 is located between the ball head seat 2 and the baffle 4. The ball head of the ball head pin 6 is inserted into the ball head shell 1, the ball head of the ball head pin 6 abuts against the ball head seat 2, and the rod portion of the ball head pin 6 extends upward out of the ball head shell 1. The dust cover 7 is connected between the rod portion of the ball head pin 6 and the ball head shell 1, and the protective cover 8 is sleeved on the outside of the dust cover 7. A chamfer 6b is provided between the outer side surface and the upper end surface of the ball head pin 6. In order to reduce wear, a quenched layer is provided on the outer side surface of the ball head pin 6, and a corresponding quenched layer is also provided on the inner side surface of the ball head shell 1. A lubricating oil groove is provided on the ball head of the ball head pin 6, and the lubricating oil groove communicates with the inner cavity of the dust cover 7 and the grease nipple 5. In order to make the connection of the dust cover 7 stable, metal skeletons are installed inside the upper end and the lower end of the dust cover 7. The outer side surface of the ball head shell 1 has a protruding connecting handle 1a, and three connecting holes are provided on the connecting handle 1a.

[0026] As Figure 2 and Figure 3 ​As shown, the upper end of the rod portion of the ball joint 6 has an assembly section 6a that extends out of the dust cover 7 and is located within the protective cover 8. The assembly section 6a is cylindrical. The protective cover 8 is tubular, and on the inner side surface at the upper end of the protective cover 8, there are three elastic pieces 8a arranged circumferentially and separately at equal intervals. The elastic pieces 8a can also be two or four. The elastic pieces 8a are flat plates, and both the inner and outer side surfaces of each elastic piece 8a are flat. The elastic pieces 8a are arranged along the axial direction of the ball joint 6. The elastic pieces 8a are integrally formed on the protective cover 8, and the protective cover 8 is made of plastic. One circumferential end of each elastic piece 8a is connected to the protective cover 8, and the other circumferential end of each elastic piece 8a is suspended. The middle part of the inner side surface of each elastic piece 8a contacts the outer side surface of the assembly section 6a, causing the elastic piece 8a to elastically abut against the assembly section 6a. When the protective cover 8 is not installed on the ball joint 6, the diameter of the inscribed circle of these elastic pieces 8a is smaller than the outer diameter of the assembly section 6a. In this way, when the assembly section 6a is inserted between these elastic pieces 8a, the elastic pieces 8a undergo outward elastic deformation, so that the elastic pieces 8a elastically abut against the outer side surface of the assembly section 6a.

[0027] As Figure 2 , Figure 3 and Figure 4 shown, the circumferential end of the elastic piece 8a connected to the protective cover 8 is the connecting end 8a1, and the circumferential end of the elastic piece 8a that is suspended is the suspended end 8a2. The lower side surface of the elastic piece 8a is inclined upward along the direction from the connecting end 8a1 to the suspended end 8a2, and the inclination angle of the lower side surface of the elastic piece 8a gradually increases along the direction from the connecting end 8a1 to the suspended end 8a2. There is an arc transition between the lower side surface of the elastic piece 8a and the inner side surface of the elastic piece 8a. The upper side surface of the elastic piece 8a is flush with the upper end surface of the protective cover 8. On the outer side surface at the upper end of the protective cover 8, there is a protruding and annular upper convex ring 8b, and the upper end surface of the upper convex ring 8b is flush with the upper end surface of the protective cover 8. On the outer side surface at the lower end of the protective cover 8, there is a protruding and annular lower convex ring 8c, and the lower end surface of the lower convex ring 8c is flush with the lower end surface of the protective cover 8. When the upper end surface of the protective cover 8 is flush with the lower end surface of the dust cover 7, the upper end of the protective cover 8 protrudes from the upper end surface of the rod portion of the ball joint 6.

[0028] When installing the protective cover 8, the protective cover 8 is sleeved onto the ball joint 6, and then the protective cover 8 is pressed or pushed towards the ball head housing 1, so that the assembly section 6a is inserted between these elastic pieces 8a. The inner side surface of the elastic piece 8a contacts the outer side surface of the assembly section 6a, causing the elastic piece 8a to elastically abut against the outer side surface of the assembly section 6a. The elastic piece 8a is tangent to the outer side surface of the assembly section 6a. Thus, the assembly section 6a is held by several elastic pieces 8a, fixing the protective cover 8 on the ball joint 6. When disassembling the protective cover 8, the protective cover 8 is pulled or pushed in the direction away from the ball head housing 1, so that the elastic piece 8a disengages from the assembly section 6a, and then the protective cover 8 is removed from the ball joint 6.

[0029] Compared with the snap structure of the prior art, the ball head assembly fixes the protective cover 8 through the elastic piece 8a. During disassembly, only the frictional resistance between the elastic piece 8a and the assembly section 6a needs to be overcome, and there is no need to overcome the deformation resistance for the snap ring to be disengaged from the groove, making it labor-saving to disassemble the protective cover 8. Moreover, since the elastic piece 8a is tangent to the outer side surface of the assembly section 6a, one circumferential end of each elastic piece 8a is connected to the protective cover 8, the other circumferential end of each elastic piece 8a is arranged in a suspended manner, and the middle part of the inner side surface of each elastic piece 8a elastically abuts against the outer side surface of the assembly section 6a, so that the contact between the elastic piece 8a and the outer side surface of the assembly section 6a is a line contact, which can also reduce the frictional resistance between the elastic piece 8a and the assembly section 6a during disassembly. Therefore, it is labor-saving to disassemble the protective cover 8 of the ball head assembly.

[0030] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. Ball head assembly, comprising a ball head housing (1) and a ball head pin (6) inserted into the ball head housing (1), the rod portion of the ball head pin (6) extends out from the upper end of the ball head housing (1) and a dust cover (7) is connected between the rod portion and the ball head housing (1), a cylindrical protective cover (8) is sleeved on the outer side of the dust cover (7), an assembly section (6a) which extends out of the dust cover (7) and is located within the protective cover (8) is provided on the rod portion of the ball head pin (6), and it is characterized in that, On the inner side surface of the upper end of the protective cover (8), there are several elastic pieces (8a) arranged circumferentially and separately. One circumferential end of each elastic piece (8a) is connected to the protective cover (8), and the other circumferential end of each elastic piece (8a) is arranged in a suspended manner. The inner side surface of each elastic piece (8a) is a plane, and the middle part of the inner side surface of each elastic piece (8a) contacts the outer side surface of the assembly section (6a) so that the elastic piece (8a) elastically abuts against the assembly section (6a).

2. The ball head assembly according to claim 1, wherein A chamfer (6b) is provided between the outer side surface and the upper end surface of the ball head pin (6). The circumferential end of the elastic piece (8a) connected to the protective cover (8) is the connection end (8a1), and the circumferential end of the elastic piece (8a) arranged in a suspended manner is the suspended end (8a2). The lower side surface of the elastic piece (8a) is inclined upward along the direction from the connection end (8a1) to the suspended end (8a2), and the inclination angle of the lower side surface of the elastic piece (8a) gradually increases along the direction from the connection end (8a1) to the suspended end (8a2).

3. The ball head assembly according to claim 1, wherein An arc transition is provided between the lower side surface and the inner side surface of the elastic piece (8a).

4. The ball head assembly according to any one of claims 1-3, characterized in that, On the outer side surface of the upper end of the protective cover (8), there is a protruding and annular upper convex ring (8b).

5. The ball head assembly according to claim 4, characterized in that, The upper end surface of the upper convex ring (8b) is flush with the upper end surface of the protective cover (8).

6. The ball head assembly according to any one of claims 1-3, characterized in that, On the outer side surface of the lower end of the protective cover (8), there is a protruding and annular lower convex ring (8c).

7. The ball head assembly according to any one of claims 1-3, characterized in that, On the outer side surface of the ball head shell (1), there is a protruding connection handle (1a).

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