CN107471946B

CN107471946B - Automobile control arm

Info

Publication number: CN107471946B
Application number: CN201710775111.3A
Authority: CN
Inventors: 李帅领; 上官文斌; 苏比哈什·如凯迦
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2017-08-31
Filing date: 2017-08-31
Publication date: 2023-08-22
Anticipated expiration: 2037-08-31
Also published as: CN107471946A

Abstract

The application discloses an automobile control arm, which comprises a control arm body and a ball head assembly arranged on the control arm body, wherein the control arm body is of an arc-shaped bending structure provided with reinforcing ribs, and three reinforcing ribs form a triangle and are provided with a first connecting end, a second connecting end and a third connecting end; the ball head assembly is fixedly arranged at the first connecting end of the control arm body through the clamping structure; the ball head assembly is internally provided with a hole for filling lubricating grease, and the ball head assembly is internally provided with a lubricating groove structure and is sealed by the rubber plug. The ball head lubricating device is reliable in performance, can conveniently lubricate the ball head, reduces the abrasion of the ball head, and can conveniently replace the ball head assembly.

Description

Automobile control arm

Technical Field

The application relates to the field of automobile suspension system accessories, in particular to an automobile control arm.

Background

The suspension system is a connecting system among wheels, a vehicle body and a vehicle frame, and comprises an elastic element, a guide mechanism, a shock absorber and the like, wherein the control arm is one of the guide mechanism elements. In the running process of the automobile, because of the vibration and steering requirements caused by road surface change, the wheels can naturally generate up-and-down runout and left-and-right swing, and part of the force generated by the movement of the wheels can be transmitted to the automobile body through the control arm, so that the performance of the control arm directly influences the safety, comfort and control stability of the automobile and must have certain rigidity and reliability. The control arm is generally connected with the automobile steering knuckle in a three-terminal connection mode, and the other two bushing ends are connected with the automobile body or the auxiliary frame. The ball head is used as an important part of the control arm assembly, is particularly critical to the jumping and steering of wheels, and has good sealing and lubricating environments, so that the wear of the ball head is reduced, and the performance is ensured.

The performance of the ball head is poor after a period of working, mainly because the lubricating effect is poor, the ball head is seriously worn, the gap between the ball head and the ball bowl is increased and is seriously swayed, the performance of the ball head is seriously influenced, and the steering and control stability of an automobile is further influenced. The bulb in the prior art often has the problem of insufficient lubrication after long-time working, and has a plurality of inconveniences caused by the structural reasons of the bulb assembly, unsatisfactory lubrication effect and difficult bulb assembly replacement.

Disclosure of Invention

The application aims to solve the problems of inconvenient lubrication of a ball head, poor lubrication effect and difficult replacement of a ball head assembly, and relates to an automobile control arm with high strength and convenient maintenance.

The technical aim of the application is realized by the following technical scheme:

the automobile control arm comprises a control arm body and a ball head assembly arranged on the control arm body, wherein the control arm body is of an arc-shaped bending structure provided with reinforcing ribs, and the three reinforcing ribs form a triangle and are provided with a first connecting end, a second connecting end and a third connecting end; the ball head assembly is fixedly arranged at the first connecting end of the control arm body through the clamping structure; the ball head assembly is internally provided with a hole for filling lubricating grease, and the ball head assembly is internally provided with a lubricating groove structure and is sealed by the rubber plug.

Further, the control arm body is provided with a hollowed-out structure and a reinforcing rib structure, and the inner reinforcing ribs form a triangular structure.

Further, the clamping structure of the first connecting end of the control arm body is a C-shaped clamping structure provided with a boss and a notch, and a bolt hole for installing a bolt is formed in the boss.

Further, the ball head assembly comprises a ball seat, a ball-shaped cover arranged in the ball seat, a ball head tightly rotatably arranged in the ball-shaped cover, a dust cover arranged between the ball seat and the ball head in a sealing manner, a lower cover plate clamped at the bottoms of the ball seat and the ball-shaped cover, and a rubber plug arranged in a central through hole of the lower cover plate.

Further, the ball seat lower extreme is provided with the turn-ups structure that is used for fixed lower apron, the upper end of ball seat is provided with the annular groove structure that is used for installing the dust cover.

Further, the lower end of the dust cover is fixed on the ball head assembly through a clamping structure of the first connecting end of the control arm body.

Further, a stepped hole is formed in the bottom of the spherical cover, and a lubrication groove is formed in the inner wall of the spherical cover.

Further, the inner wall of the spherical cover is provided with a crisscross groove structure.

Further, one end of the rubber plug is conical, the other end of the rubber plug is a round plane, the longitudinal section of the rubber plug is I-shaped, and a blind hole is formed in the center of the rubber plug.

Further, a wavy structure is arranged at the contact part of the inner hole of the dust cover and the ball head, and the ball head of the dust cover is tightly attached to the peripheral wall of the dust cover through a clamping ring.

In summary, compared with the prior art, the application has the following beneficial effects:

1. the control arm body structure not only meets the performance requirement, but also realizes the lightweight design;

2. the ball head assembly is fixed on the control arm body in a clamping mode, so that the ball head assembly is convenient to replace;

3. the ball head can be conveniently and regularly lubricated, the lubricating effect is good, the wear of the ball head is reduced, the performance of the ball head is ensured, and the service life of the ball head is prolonged;

4. the ball head assembly has good sealing effect, and the number of the clamping rings used during sealing of the dust cover is reduced, so that the number of assembly parts is reduced, and the assembly process is simplified.

Drawings

Fig. 1 is an isometric view of an automotive control arm according to the present application.

Fig. 2 is a front view of the control arm of the present application.

FIG. 3 is a cross-sectional view of an automotive control arm ball head assembly of the present application.

Fig. 4 is an isometric view of a ball-type cover for an automotive control arm according to the present application.

Fig. 5 is an enlarged schematic view of the portion a shown in fig. 3.

Fig. 6 is an enlarged schematic view of the portion B shown in fig. 3.

Fig. 7 is an enlarged schematic view of the portion C shown in fig. 3.

Symbol description: 1. the control arm comprises a control arm body, 2, a ball head assembly, 3, a small bushing, 4, a large bushing, 5, a first bolt, 6, a second bolt, 11, a first connecting end, 12, a second connecting end, 13, a third connecting end, 21, a ball head, 22, a dust cover, 23, a clamping ring, 24, a ball seat, 25, a ball cover, 26, a lower cover plate, 27, a rubber plug, 251, a stepped hole, 252, a lubrication groove, 271 and a blind hole.

Detailed Description

The present application is described in further detail below with reference to the drawings and examples for the understanding of those skilled in the art.

The application discloses an automobile control arm, which is shown in fig. 1 and 2 and comprises a control arm body 1, a ball head assembly 2, a small bushing 3, a large bushing 4, a first bolt 5 and a second bolt 6. The control arm body 1 is arc curved structure, adopts the casting shaping, and inside has hollow out construction to be provided with three strengthening rib, the strengthening rib forms triangle-shaped structure, can reach the effect of subtracting the heavy, and the setting of strengthening rib can increase structural strength simultaneously, satisfies structural strength's performance requirement. The control arm body 1 on be provided with three link: the ball head assembly 2 is arranged at the first connecting end, the small bushing 3 is arranged at the second connecting end 12, and the large bushing 4 is arranged at the third connecting end 13.

The side surface of the first connecting end 11 is provided with a boss structure, the middle of the boss is provided with a notch, so that the first connecting end 11 is shaped like a C, and the boss is provided with a bolt hole for installing the first bolt 5 and the second bolt 6. The width of the gap can be reduced by locking the first bolt 5 and the second bolt 6, so that the inner diameter of the cylindrical mounting hole of the first connecting end 11 is reduced, the ball head assembly 2 mounted on the first connecting end 11 is clamped, maintenance and replacement of the ball head assembly can be conveniently realized by adopting the mode, and meanwhile, when a gap is generated between the ball cover 25 and the ball head 21 due to slight abrasion of the ball head 21, the gap can be eliminated by properly increasing the locking force of the first bolt 5 and the second bolt 6.

As shown in fig. 3, the ball head assembly 2 includes a ball seat 24, a ball cap 25 disposed in the ball seat 24, a ball head 21 tightly rotatably disposed in the ball cap 25, a dust cap 22 sealingly disposed between the ball seat 24 and the ball head 21, a lower cover plate 26 engaged with bottoms of the ball seat 24 and the ball cap 25, and a rubber stopper 27 disposed in a central through hole of the lower cover plate 26.

As shown in fig. 4, the dust cover 22 is made of rubber material, has good elastic performance, the inner hole at the upper end of the dust cover 22 is smaller than the outer diameter of the upper end of the ball head 21, a pre-sealing effect is achieved during assembly, a wavy structure is arranged at the contact part of the inner hole at the upper end of the dust cover 22 and the ball head 21, a multi-stage sealing structure is formed, and the upper end of the dust cover 22 is clamped and fixed on the ball head 21 by using the clamping ring 23, so that the sealing effect of the multi-stage sealing structure is further ensured. As shown in fig. 5, the lower end of the dust cover 22 is provided with a thickened inward flanging structure, the upper end of the ball seat 24 is provided with an annular groove structure, and the flanging structure is positioned in the groove structure during assembly, so that the installation and positioning of the lower end of the dust cover 22 are realized, the lower end of the dust cover 22 can be reliably fixed in the annular groove through the first connecting end 11, the falling and shifting of the dust cover 22 are effectively prevented, other clamping and fixing parts are avoided by the fixing mode of the lower end of the dust cover 22, the number of assembly parts is reduced, and the assembly process is simplified. The dust cover 22 adopting the combination of the structure and the fixing mode has good sealing effect, can effectively prevent dust and water from entering the ball seat 24, avoids the rust of the ball head 21, reduces abrasion and unsmooth operation, and prolongs the service life. The lower extreme of ball seat 24 sets up the turn-ups structure of outwards extending for the installation location of bulb assembly 2 at first link 11 guarantees assembly precision.

As shown in fig. 6, the spherical cover 25 is made of a resin material and is used for placing the spherical head 21, so that direct contact between the spherical head 21 and the ball seat 24 is avoided, abrasion of the spherical head 21 is reduced, lubrication grooves 252 are formed in the inner wall of the spherical cover 25, the lubrication grooves 252 are distributed in a cross shape on the inner wall of the spherical cover 25, more lubrication grease can be stored in the cross lubrication grooves 252 along the warp direction and the weft direction of the inner wall of the spherical cover 25 respectively, the spherical head 21 is lubricated more fully and uniformly in the running process of the spherical head 21, and stepped holes 251 are formed in the bottom of the spherical cover 25 and are used as channels for injecting the lubrication grease. The lower cover plate 26 forms a flanging structure at the lower end of the ball seat 24 through a spin riveting process to realize compaction and fixation, and meanwhile, the ball head 21, the ball cover 25 and the ball seat 24 are assembled.

As shown in fig. 7, a gap is formed between the ball cover 25 and the lower cover plate 26, which can hold lubricating grease, a through hole is formed in the center of the bottom of the lower cover plate 26, which is a channel for adding lubricating grease, and a rubber plug 27 is plugged into the through hole to seal, wherein the rubber plug and the through hole are in interference fit. The cross section of the rubber plug 27 is in an I shape and is divided into a large end and a small end, the small end is provided with a blind hole 271 and a sharp top, the rubber plug can be ensured to be plugged into the hole smoothly by adopting the structure, the large end is flat, good tightness can be ensured, and sundries such as dust, water and the like can be effectively prevented from entering the ball seat 24. When the ball head 21 is not sufficiently lubricated and lubricating grease needs to be added, the rubber plug 27 is taken down, the lubricating grease is injected through the hole in the middle of the lower cover plate 26, the lubricating grease flows to the periphery of the ball head 21 along the groove 252 of the lubricating cross by the stepped hole 25 to generate a lubricating effect, and after lubrication is finished, the rubber plug 27 is plugged again, so that the whole lubricating grease adding process is very simple and convenient.

While the present application has been described in connection with the above embodiments, the present application is not limited to the above embodiments, but is only limited by the appended claims, and modifications and variations can be easily made thereto by those skilled in the art, which fall within the scope of the present application as defined by the appended claims.

Claims

1. An automobile control arm comprises a control arm body (1) and a ball head assembly (2) arranged on the control arm body (1), wherein the control arm body (1) is of an arc-shaped bending structure provided with reinforcing ribs, three reinforcing ribs form a triangle, and a first connecting end (11), a second connecting end (12) and a third connecting end (13) are arranged; the ball head assembly (2) is fixedly arranged at a first connecting end (11) of the control arm body (1) through a clamping structure; the ball head assembly (2) is internally provided with a hole for filling lubricating grease, the ball head assembly (2) is internally provided with a lubricating groove structure, and the hole in the ball head assembly (2) is sealed through a rubber plug;

the control arm body is provided with a hollowed-out structure and a reinforcing rib structure, and the reinforcing rib structure forms a triangular structure;

the clamping structure of the first connecting end (11) of the control arm body (1) is a C-shaped clamping structure provided with a boss and a notch, and a bolt hole for installing a bolt is formed in the boss.

2. An automotive control arm as described in claim 1, wherein: the ball head assembly (2) comprises a ball seat (24), a ball-shaped cover (25) arranged in the ball seat (24), a ball head (21) tightly rotatably arranged in the ball-shaped cover (25), a dust cover (22) arranged between the ball seat (24) and the ball head (21) in a sealing manner, a lower cover plate (26) clamped at the bottoms of the ball seat (24) and the ball-shaped cover (25), and a rubber plug (27) arranged in a central through hole of the lower cover plate (26).

3. An automotive control arm as claimed in claim 2, wherein: the ball seat (24) lower extreme is provided with the turn-ups structure that is used for fixed apron (26) down, the upper end of ball seat (24) is provided with the annular groove structure that is used for installing dust cover (22).

4. An automotive control arm as claimed in claim 2, wherein: the lower end of the dust cover (22) is fixed on the ball head assembly (2) through a clamping structure of the first connecting end (11) of the control arm body (1).

5. An automotive control arm as claimed in claim 2, wherein: the bottom of the spherical cover (25) is provided with a stepped hole (251), and the inner wall of the spherical cover (25) is provided with a lubrication groove (252).

6. An automotive control arm as described in claim 5, wherein: the inner wall of the spherical cover (25) is provided with crisscrossed lubrication grooves (252).

7. An automotive control arm as claimed in claim 2, wherein: one end of the rubber plug (27) is conical, the other end of the rubber plug is a round plane, the longitudinal section of the rubber plug (27) is I-shaped, and a blind hole (271) is formed in the center of the rubber plug.

8. An automotive control arm as claimed in claim 2, wherein: the part of the inner hole of the dust cover (22) contacted with the ball head (21) is provided with a wave-shaped structure, and the dust cover (22) is tightly attached to the ball head (21) through a clamping ring (23) on the peripheral wall of the dust cover (22).