Suspension arm assembly

Abstract

The utility model provides a suspension arm assembly, and belongs to the technical field of automobile accessories. The problem that the labor intensity is high when an existing suspension arm assembly is assembled is solved. The suspension arm assembly comprises an arm body, lining assemblies are installed at the two ends of the arm body respectively, a ball head assembly is installed in the middle of the arm body, the ball head assembly comprises a ball head shell and a ball head pin inserted into the ball head shell, the 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, and the outer side of the dust cover is sleeved with a protective cover. A protruding convex ring is arranged on the outer side face of the ball head shell, a close-fitting section is arranged on the portion, below the convex ring, of the ball head shell, a through hole is formed in the arm body, the close-fitting section is inserted into the through hole and forms close-fitting fixation, the convex ring abuts against the upper surface of the arm body, and the outer edge of the convex ring protrudes out of the peripheral face of the protective cover. According to the suspension arm assembly, the labor intensity during assembly is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of automotive parts and relates to a suspension arm assembly. Background Art

[0002] A suspension is the general term for the force transmission connection device between the wheels and the body of an automobile. Its function is to transmit the forces and torques between the wheels and the body, buffer the impact force transmitted from the uneven road surface to the body, and reduce the resulting vibration to ensure the smooth driving of the automobile. The suspension includes elastic elements, shock absorbers, and force transmission devices, which play the roles of buffering, shock absorption, and force transmission respectively.

[0003] The elastic element supports the vertical load, alleviates and suppresses the vibration and impact caused by the uneven road surface. The elastic elements mainly include leaf springs, coil springs, torsion bar springs, air springs, and rubber springs, etc. The shock absorber is used to suppress the oscillation when the spring rebounds after absorbing shock and the impact from the road surface. It is widely used in automobiles to accelerate the attenuation of the vibration of the frame and the body, so as to improve the ride comfort of the automobile. The force transmission device includes a suspension arm, which is connected between the wheel and the body and has the functions of guiding and force transmission.

[0004] As disclosed in a Chinese patent document for a suspension arm assembly [Application No.: CN 202322154498.4, Publication No.: CN220594569U], it includes an arm body, and a ball head assembly is connected to the arm body. The ball head assembly includes a ball head pin, a ball head housing, a lower ball seat, a ball head cover, an oil nozzle, a dust cover, a protective cover, and a nut, etc. The ball head housing is integrally cast with the arm body. The lower ball seat and the ball head cover are both fixedly connected in the ball head housing. The head of the ball head pin is embedded in the lower ball seat and the ball head pin can rotate relative to the lower ball seat. The oil nozzle is detachably fixedly connected to the ball head cover and is communicated with the head of the ball head pin. The dust cover is connected between the ball head housing and the rod part of the ball head pin, and the protective cover is sleeved outside the dust cover. Since the ball head housing is integrally cast with the arm body, when assembling the ball head assembly, it is necessary to install multiple parts such as the ball head pin, the lower ball seat, the ball head cover, the oil nozzle, the dust cover, the protective cover, and the nut on the arm body. There are many parts and different installation directions. During the assembly process, it is necessary to flip and move the arm body multiple times. The arm body is large in volume and heavy in weight, resulting in a large labor intensity during assembly. Summary of the Utility Model

[0005] The purpose of the present utility model is to address the above problems existing in the prior art and propose a suspension arm assembly, and the technical problem to be solved is how to reduce the labor intensity during assembly.

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

[0007] Suspension arm assembly, including an arm body, bushing assemblies are respectively installed at both ends of the arm body, a ball head assembly is installed in the middle of the arm body, the ball head assembly includes a ball head shell and a ball head pin inserted into the ball head shell, the rod part of the ball head pin extends out from the upper end of the ball head shell and a dust cover is connected between the ball head pin and the ball head shell, a protective cover is sleeved on the outer side of the dust cover, and it is characterized in that, a protruding convex ring is provided on the outer side surface of the ball head shell, a tight-fitting section is provided on the ball head shell below the convex ring, a through hole is provided on the arm body, the tight-fitting section is inserted into the through hole and forms a tight fit for fixation, the convex ring abuts against the upper surface of the arm body, and the outer edge of the convex ring protrudes out of the outer peripheral surface of the protective cover.

[0008] When assembling the ball head assembly, first install the ball head pin, the dust cover and the protective cover onto the ball head shell, then align the tight-fitting section of the ball head shell with the through hole of the arm body, and by the force applied to the outer edge of the convex ring protruding out of the outer peripheral surface of the protective cover, press-fit the ball head shell into the through hole of the arm body and form a tight fit for fixation, and at the same time, perform press-fit positioning by the convex ring abutting against the upper surface of the arm body.

[0009] Since the outer edge of the convex ring protrudes out of the outer peripheral surface of the protective cover, and the ball head shell is press-fit and fixed to the arm body through the tight-fitting section, the ball head pin, the dust cover and the protective cover can all be assembled on the ball head shell. After the ball head assembly is combined, it is press-fitted onto the arm body at one time. In this way, there is no need to install the ball head pin, the protective cover and the dust cover on the arm body, that is, only the arm body needs to be carried during press-fitting, and there is no need to repeatedly turn over and move the arm body to install the ball head pin, the protective cover and the dust cover. Moreover, the volume and weight of the ball head shell are greatly reduced compared with the volume and weight of the arm body, and the labor intensity of turning over and moving the ball head shell is low. Therefore, compared with the prior art, the labor intensity during assembly of this suspension arm assembly is reduced.

[0010] In the above-mentioned suspension arm assembly, a limiting plane is provided on the outer side surface of the convex ring, and there are two limiting planes which are symmetrically arranged. The limiting plane has a marking effect on the circumferential position of the ball head shell on the one hand, which is convenient for identifying and positioning the circumferential position of the ball head shell during press-fitting; on the other hand, it can prevent the ball head shell from continuously rolling and falling to the ground when placed on the workbench, avoid the bump caused by the falling of the ball head shell and the worker bending down to pick it up, ensure the workpiece quality and reduce the labor intensity.

[0011] In the above-mentioned suspension arm assembly, a fixing section is provided on the ball head shell above the convex ring, the lower end of the dust cover has a lower fixing ring, the lower fixing ring is sleeved on the outer side of the fixing section and fixed, and the lower end surface of the lower fixing ring abuts against the upper end surface of the convex ring. The convex ring has a positioning effect on the lower fixing ring of the dust cover, which is convenient for the assembly between the dust cover and the ball head shell.

[0012] In the above-mentioned suspension arm assembly, the lower end surface of the protective cover abuts against the upper end surface of the lower fixing ring, and the outer side surface of the lower fixing ring is flush with the outer side surface of the protective cover. This can prevent the protective cover and the dust cover from blocking the outer edge of the convex ring, ensuring that when the ball head assembly is press-fitted with the arm body, it can be pressed by the outer edge of the convex ring, making the press-fitting process proceed smoothly.

[0013] In the above-mentioned suspension arm assembly, the upper end of the dust cover has an upper fixing ring, the upper fixing ring is sleeved on the rod portion of the ball head pin and fixed, the rod portion of the ball head pin has a shoulder, and the upper fixing ring is located above the shoulder and abuts against the shoulder. The shoulder has a limiting effect on the upper fixing ring, preventing the upper end of the dust cover from sliding down along the rod portion of the ball head pin and making the structure of the ball head assembly stable.

[0014] In the above-mentioned suspension arm assembly, the outer side surface of the tightly fitting section has knurled straight lines. The knurled straight lines can increase the frictional resistance after the tightly fitting section is fitted with the inner wall surface of the through hole, making the ball head housing fixed stably on the arm body.

[0015] In the above-mentioned suspension arm assembly, the inner wall surface of the lower end of the through hole has a protruding positioning ring, and the inner side surface of the positioning ring abuts against the outer side surface of the ball head housing. The abutment between the positioning ring and the ball head housing has a radial positioning effect, reducing the inaccuracy of radial positioning caused by the processing error of the knurled straight lines.

[0016] In the above-mentioned suspension arm assembly, the outer side surface of the convex ring has knurled mesh patterns. The knurled mesh patterns can increase the frictional resistance when the ball head housing is held, facilitating the assembly process.

[0017] In the above-mentioned suspension arm assembly, the lower surface of the arm body has a protruding projection. The projection can increase the thickness of the arm body, thereby increasing the structural strength of the arm body and making the structure of the suspension arm assembly stable.

[0018] Compared with the prior art, the present utility model has the following advantages:

[0019] The outer side surface of the ball head housing has a protruding convex ring, the outer edge of the convex ring protrudes from the outer peripheral surface of the protective cover, the ball head housing and the arm body are fixed by a tight fit, and the convex ring abuts against the upper surface of the arm body, reducing the labor intensity during the assembly of the suspension arm assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the top view of the present suspension arm assembly.

[0021] Figure 2 is the cross-sectional view at the ball head assembly of the present suspension arm assembly.

[0022] Figure 3 is the half cross-sectional view of the ball head housing of the present suspension arm assembly.

[0023] In the figure, 1 is the arm body; 11 is the through hole; 12 is the positioning ring; 13 is the protrusion; 2 is the bushing assembly; 3 is the ball head assembly; 31 is the ball head housing; 311 is the convex ring; 3111 is the knurled mesh; 3112 is the limiting plane; 312 is the tightly fitting section; 3121 is the straight knurled pattern; 313 is the fixed section; 32 is the ball head seat; 33 is the disc spring; 34 is the baffle; 35 is the grease nipple; 36 is the ball head pin; 361 is the shaft shoulder; 37 is the dust cover; 371 is the upper fixing ring; 372 is the lower fixing ring; 38 is the protective cover; 39 is the nut. Detailed implementation mode

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

[0025] As Figure 1 shown, a suspension arm assembly includes a C-shaped arm body 1. Bushing assemblies 2 are respectively installed at both ends of the arm body 1, and a ball head assembly 3 is installed in the middle of the arm body 1. The bushing assembly 2 includes an outer sleeve, an inner sleeve and a rubber body located between the outer sleeve and the inner sleeve. The outer sleeve is sleeved on the end of the arm body 1 and is fixed by tight fit.

[0026] As Figure 1 and Figure 2 shown, the ball head assembly 3 includes a ball head housing 31, a ball head seat 32, a disc spring 33, a baffle 34, a grease nipple 35, a ball head pin 36, a dust cover 37, a protective cover 38 and a nut 39. The ball head seat 32 is fixed in the ball head housing 31. The baffle 34 is fixed in the ball head housing 31 and is located below the ball head seat 32. The grease nipple 35 is fixedly connected to the baffle 34. The disc spring 33 is located between the ball head seat 32 and the baffle 34. The ball head of the ball head pin 36 is inserted into the ball head housing 31. The ball head of the ball head pin 36 abuts against the ball head seat 32. The rod portion of the ball head pin 36 extends upward out of the ball head housing 31. The dust cover 37 is connected between the rod portion of the ball head pin 36 and the ball head housing 31. The protective cover 38 is sleeved on the outside of the dust cover 37. The upper end of the rod portion of the ball head pin 36 extends out of the protective cover 38 and is threadedly connected to the nut 39. In order to reduce wear, a quenched layer is provided on the outer side surface of the ball head pin 36, and a corresponding quenched layer is also provided on the inner side surface of the ball head housing 31.

[0027] As Figure 2 and Figure 3As shown in the figure, a protruding convex ring 311 is provided on the outer side surface of the ball head housing 31. A tight-fitting section 312 is provided below the convex ring 311 on the ball head housing 31, and a fixing section 313 is provided above the convex ring 311 on the ball head housing 31. A through hole 11 is formed in the arm body 1. The tight-fitting section 312 is inserted into the through hole 11 and forms a tight-fitting fixation. The convex ring 311 abuts against the upper surface of the arm body 1, and the outer edge of the convex ring 311 protrudes from the outer peripheral surface of the protective cover 38. The upper end of the dust cover 37 has an upper fixing ring 371. The upper fixing ring 371 is sleeved on the rod portion of the ball head pin 36 and is tightly and fixedly fitted. A shoulder 361 is provided on the rod portion of the ball head pin 36. The upper fixing ring 371 is located above the shoulder 361 and abuts against the shoulder 361. The lower end of the dust cover 37 has a lower fixing ring 372. The lower fixing ring 372 is sleeved on the outside of the fixing section 313 and is tightly and fixedly fitted. The lower end surface of the lower fixing ring 372 abuts against the upper end surface of the convex ring 311. The lower end surface of the protective cover 38 abuts against the upper end surface of the lower fixing ring 372, and the outer side surface of the lower fixing ring 372 is flush with the outer side surface of the protective cover 38. Metal skeletons are provided inside both the upper fixing ring 371 and the lower fixing ring 372, so that the dust cover 37 is stably fixed on the ball head pin 36 and the ball head housing 31. Knurled straight lines 3121 are provided on the outer side surface of the tight-fitting section 312. A protruding positioning ring 12 is provided on the hole wall surface at the lower end of the through hole 11. The inner side surface of the positioning ring 12 abuts against the outer side surface of the ball head housing 31. Knurled mesh patterns 3111 are provided on the outer side surface of the convex ring 311. Two limiting planes 3112 are also provided on the outer side surface of the convex ring 311 and are symmetrically arranged. A protruding projection 13 is provided on the lower surface of the arm body 1 on one side of the ball head assembly 3.

[0028] When assembling the ball head assembly 3, first, the ball head pin 36, the ball head seat 32, the disc spring 33, and the baffle 34 fixed with the oil nozzle 35 are sequentially placed into the ball head housing 31 from the lower end of the ball head housing 31. Then, the lower end of the ball head housing 31 is riveted and closed to fix the baffle 34 in the ball head housing 31. Then, the dust cover 37 is fixed to the rod portion of the ball head pin 36 and the upper end of the ball head housing 31. Then, the protective cover 38 is sleeved on the outside of the dust cover 37. Then, the nut 39 is connected to the upper end of the rod portion of the ball head pin 36. Then, the tight-fitting section 312 of the ball head housing 31 is aligned with the through hole 11 of the arm body 1. The outer edge of the convex ring 311 protruding from the outer peripheral surface of the protective cover 38 is stressed, and the ball head housing 31 is press-fitted into the through hole 11 of the arm body 1 for fixation, and the press-fitting positioning is performed by the convex ring 311 abutting against the upper surface of the arm body 1.

[0029] Since the outer edge of the convex ring 311 protrudes from the outer peripheral surface of the protective cover 38, and the ball head housing 31 is press-fitted and fixed to the arm body 1 through the tight-fitting section 312, the assembly of the ball head seat 32, the disc spring 33, the baffle 34, the ball head pin 36, the dust cover 37, the protective cover 38 and the nut 39 can all be carried out on the ball head housing 31. After the ball head assembly 3 is completed, it is press-fitted onto the arm body 1 at one time. In this way, there is no need to install the ball head seat 32, the disc spring 33, the baffle 34, the ball head pin 36, the dust cover 37, the protective cover 38 and the nut 39 on the arm body 1. That is, only the arm body 1 needs to be carried during press-fitting, and there is no need to repeatedly turn over and move the arm body 1 to install the ball head seat 32, the disc spring 33, the baffle 34, the ball head pin 36, the dust cover 37, the protective cover 38 and the nut 39. Moreover, the volume and weight of the ball head housing 31 are greatly reduced compared with the volume and weight of the arm body 1, and the labor intensity of turning over and moving the ball head housing 31 is low. Therefore, compared with the prior art, the labor intensity during assembly of this suspension arm assembly is reduced.

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

Claims

1. Suspension arm assembly, including an arm body (1), bushing assemblies (2) are respectively installed at both ends of the arm body (1), a ball head assembly (3) is installed in the middle of the arm body (1), the ball head assembly (3) includes a ball head housing (31) and a ball head pin (36) inserted into the ball head housing (31), the rod portion of the ball head pin (36) extends out from the upper end of the ball head housing (31) and a dust cover (37) is connected between the ball head pin (36) and the ball head housing (31), a protective cover (38) is sleeved on the outer side of the dust cover (37), characterized in that, The outer side surface of the ball head shell (31) has a protruding convex ring (311). Below the convex ring (311) on the ball head shell (31), there is a tight-fitting section (312). A through hole (11) is formed in the arm body (1). The tight-fitting section (312) is inserted into the through hole (11) to form a tight fit and fixation. The convex ring (311) abuts against the upper surface of the arm body (1), and the outer edge of the convex ring (311) protrudes from the outer peripheral surface of the protective cover (38).

2. The suspension arm assembly according to claim 1, characterized in that, The outer side surface of the convex ring (311) is provided with limiting planes (3112), and there are two limiting planes (3112) which are symmetrically arranged.

3. The suspension arm assembly according to claim 1, characterized in that, Above the convex ring (311) on the ball head shell (31), there is a fixing section (313). The lower end of the dust cover (37) has a lower fixing ring (372). The lower fixing ring (372) is sleeved on the outer side of the fixing section (313) and fixed. The lower end surface of the lower fixing ring (372) abuts against the upper end surface of the convex ring (311).

4. The suspension arm assembly according to claim 3, characterized in that, The lower end surface of the protective cover (38) abuts against the upper end surface of the lower fixing ring (372), and the outer side surface of the lower fixing ring (372) is flush with the outer side surface of the protective cover (38).

5. The suspension arm assembly according to claim 1, wherein The upper end of the dust cover (37) has an upper fixing ring (371). The upper fixing ring (371) is sleeved on the rod part of the ball head pin (36) and fixed. There is a shoulder (361) on the rod part of the ball head pin (36). The upper fixing ring (371) is located above the shoulder (361) and abuts against the shoulder (361).

6. The suspension arm assembly according to any one of claims 1-5, characterized in that, The outer side surface of the tight-fitting section (312) has knurled straight lines (3121).

7. The suspension arm assembly according to claim 6, characterized in that, On the hole wall surface at the lower end of the through hole (11), there is a protruding positioning ring (12). The inner side surface of the positioning ring (12) abuts against the outer side surface of the ball head shell (31).

8. The suspension arm assembly according to any one of claims 1-5, characterized in that, The outer side surface of the convex ring (311) has knurled mesh patterns (3111).

9. The suspension arm assembly according to any one of claims 1-5, characterized in that, The lower surface of the arm body (1) has a protruding projection (13).

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