阅读说明：本技术 一种后下控制臂 (Rear lower control arm ) 是由 俞红达 尤丰富 杨基东 曾国庆 于 2021-01-07 设计创作，主要内容包括：本发明公开了一种后下控制臂,包括控制臂本体,控制臂本体为两端收缩的纺形结构,控制臂本体上端焊接有上盖板,上盖板中心设有通孔,通孔边缘为向上竖起的侧翻边,上盖板一端设有缺口,另一端底部与控制臂本体底部之间通过弹性的支撑板焊接,另一端顶部焊接有连接板,连接板上设有连接孔和凹坑,凹坑位于连接孔受力方向上靠近上盖板的一侧；将上盖板的通孔边缘设置为侧翻边,提高了上盖板的刚度；通过在上盖板和控制臂本体之间焊接U型支撑板,可保证上盖板和控制臂本体连接位置的载荷分布均匀；通过在连接孔的受力方向靠近上盖板的一侧设置凹坑,同时增加了连接孔到连接板上端的距离,从而将连接孔的使用寿命由15万次提高至30万次。(The invention discloses a rear lower control arm, which comprises a control arm body, wherein the control arm body is of a spinning structure with two contracted ends, the upper end of the control arm body is welded with an upper cover plate, the center of the upper cover plate is provided with a through hole, the edge of the through hole is an upward standing side flanging, one end of the upper cover plate is provided with a notch, the bottom of the other end is welded with the bottom of the control arm body through an elastic support plate, the top of the other end is welded with a connecting plate, the connecting plate is provided with a connecting hole and a pit, and the pit is positioned on one side, close; the edge of the through hole of the upper cover plate is set to be a side flanging, so that the rigidity of the upper cover plate is improved; the U-shaped supporting plate is welded between the upper cover plate and the control arm body, so that the load at the connecting position of the upper cover plate and the control arm body can be uniformly distributed; one side that is close to the upper cover plate through the atress direction at the connecting hole sets up the pit, has increased the distance of connecting hole to connecting plate upper end simultaneously to improve the life of connecting hole to 30 ten thousand by 15 ten thousand times.)

1. The utility model provides a control arm under back, includes control arm body (1), control arm body (1) is the spinning structure of both ends shrink, the welding of control arm body (1) upper end has upper cover plate (2), its characterized in that: the improved structure of the automobile engine is characterized in that a through hole is formed in the center of the upper cover plate (2), the edge of the through hole is a side flanging (201) standing upwards, one end of the upper cover plate (2) is provided with a notch, the bottom of the other end of the upper cover plate is welded with the bottom of the control arm body (1) through an elastic supporting plate (4), a connecting plate (3) is welded to the top of the other end of the upper cover plate, a connecting hole (301) and a pit (302) are formed in the connecting plate (3), and the pit (302) is located in the direction, close to the stress direction of the.

2. A lower rear control arm according to claim 1, wherein: the supporting plate (4) is of a double-layer U-shaped structure, vertical turned edges (401) are arranged at two ends of the supporting plate (4), and the supporting plate (4) is welded with the upper cover plate (2) through spot welding through the turned edges (401).

3. A lower rear control arm according to claim 1, wherein: the upper end of the side wall of the control arm body (1) is provided with a horizontal upper flanging (101), and the control arm body (1) is welded with the upper cover plate (2) through the upper flanging (101).

4. A lower rear control arm according to claim 1, wherein: the bottom of the control arm body (1) is provided with a plug hole (103), and the bottom of the support plate (4) is located in the plug hole (103) and is subjected to plug welding with the control arm body (1).

5. A lower rear control arm according to claim 1, wherein: the center of the bottom of the control arm body (1) is provided with a spring seat (102), and the spring seat (102) is concentric with the through hole.

6. A lower rear control arm according to claim 1, wherein: the distance between the connecting hole (301) and the top of the connecting plate (3) is 10-15 mm.

7. A lower rear control arm according to claim 1, wherein: the bottom of the connecting plate (3) is provided with a lower flanging (303), and the connecting plate (3) is welded with the upper cover plate (2) through the lower flanging (303).

Technical Field

The invention relates to the field of vehicle engineering, in particular to a rear lower control arm.

Background

At present, the automobile is all installed suspension system for the shock attenuation, and current suspension system includes macpherson suspension, two cross arm suspensions, torsion beam suspension, trailing arm suspension, leaf spring suspension and multi-link suspension etc.. In general, a macpherson suspension and a double wishbone suspension are used for a front suspension system, and a torsion beam suspension and a multi-link suspension are used for a rear suspension system.

The rear lower control arm is an important component of the multi-link suspension and mainly bears various forces and moments transmitted by tires in the driving process of a vehicle, and the position of the conventional rear lower control arm connected with the suspension in the using process can be frequently subjected to fatigue cracking to influence the safety and stability of a rear suspension system.

Disclosure of Invention

The invention provides a rear lower control arm aiming at the situation in the background technology, the flanging is arranged between the upper cover plate and the control arm main body, the support strength of the upper cover plate is improved through the flanging, and meanwhile, the pit is arranged at the position of the connecting hole of the stabilizer bar, so that the stress distribution is uniform, and the connecting strength is improved.

In order to solve the technical problem, the invention is solved by the following technical scheme: the utility model provides a control arm under back, includes the control arm body, the control arm body is the spinning shape structure of both ends shrink, the welding of control arm body upper end has the upper cover plate, the upper cover plate center is equipped with the through-hole, the side turn-ups that the through-hole edge was stood up for making progress, upper cover plate one end is equipped with the breach, other end bottom with through elastic backup pad welding between the control arm body bottom, the welding of other end top has the connecting plate, be equipped with connecting hole and pit on the connecting plate, the pit is located be close to in the connecting hole atress direction one side of upper cover plate.

Preferably, the supporting plate is of a double-layer U-shaped structure, vertical flanges are arranged at two ends of the supporting plate, and the supporting plate is welded with the upper cover plate through spot welding through the flanges.

Preferably, the upper end of the side wall of the control arm body is provided with a horizontal upper flanging, and the control arm body is welded with the upper cover plate through the upper flanging.

Preferably, the bottom of the control arm body is provided with a plug hole, and the bottom of the support plate is located in the plug hole and is subjected to plug welding with the control arm body.

Preferably, a spring seat is arranged at the center of the bottom of the control arm body, and the spring seat is concentric with the through hole.

Preferably, the distance between the connecting hole and the top of the connecting plate is 10-15 mm.

Preferably, the bottom of the connecting plate is provided with a lower flanging, and the connecting plate is welded with the upper cover plate through the lower flanging.

When the rear lower control arm is used, one end of the rear lower control arm is connected with the frame through the connecting sleeve, the other end of the rear lower control arm is connected with the vehicle body, the automobile shock absorber is connected with the spring seat of the rear lower control arm through the shock absorption spring, and the upper cover plate is connected with the stabilizer bar on the frame through the connecting hole on the connecting plate.

When the automobile jolts in the driving process, the impact force that the automobile body of automobile can receive passes through the bumper shock absorber and transmits to the frame on, the control arm can receive the impact earlier after the in-process that the bumper shock absorber will impact force transmission, through the double-deck backup pad of welding the U type between control arm body bottom and upper cover plate, can improve the joint strength of upper cover plate and control arm down afterwards, do benefit to the evenly distributed of load, simultaneously carry out plug welding and the turn-ups and the upper cover plate spot welding that the backup pad upper end set up with the consent of seting up backup pad lower extreme and control arm body bottom, can reduce the stress concentration of welding seam position.

Meanwhile, in order to prevent the stabilizer bar and the connecting plate on the upper cover plate from cracking caused by continuous impact, a concave pit can be arranged on one side, close to the upper cover plate, of the stress direction of the connecting hole in the connecting plate, the distance between the connecting hole and the upper end of the connecting plate is increased to 10-15mm, and when the connecting hole is subjected to tensile force, the stress deformation of the connecting hole can be compensated through the deformation of the concave pit, so that the deformation quantity of the connecting hole is reduced, and the service life of the connecting hole is prolonged.

The invention has the beneficial effects that:

1. the edge of the through hole of the upper cover plate is arranged in a side flanging mode, so that the integral rigidity of the upper cover plate is improved.

2. The U-shaped elastic supporting plate is welded between the upper cover plate and the control arm body, so that the load distribution at the connecting position of the upper cover plate and the control arm body can be ensured to be uniform.

3. One side that is close to the upper cover plate through the atress direction at the connecting hole sets up the pit, and the deformation through the pit compensates the atress deformation of connecting hole, has increased the distance of connecting hole to connecting plate upper end simultaneously to improve the life of connecting hole to 30 ten thousand by 15 ten thousand times.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

In the figure: the control arm comprises a control arm body 1, an upper flanging 101, a spring seat 102, a plug hole 103, a connecting sleeve 104, an upper cover plate 2, a side flanging 201, a connecting plate 3, a connecting hole 301, a pit 302, a lower flanging 303, a supporting plate 4 and a flanging 401.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments described herein without the need for inventive work, are within the scope of the present invention.

The embodiment is shown in fig. 1 to 2, a rear lower control arm, which includes a control arm body 1, the control arm body 1 is a spinning structure with two contracted ends, an upper cover plate 2 is welded to the upper end of the control arm body 1, a through hole is arranged at the center of the upper cover plate 2, the edge of the through hole is a side flanging 201 standing upwards, a notch is arranged at one end of the upper cover plate 2, the bottom of the other end is welded to the bottom of the control arm body 1 through an elastic support plate 4, a connecting plate 3 is welded to the top of the other end, a connecting hole 301 and a pit 302 are arranged on the connecting plate 3, and the pit 302 is located on one side, close to the upper cover plate 2, of the connecting hole.

The supporting plate 4 is of a double-layer U-shaped structure, vertical flanges 401 are arranged at two ends of the supporting plate 4, and the supporting plate 4 is welded with the upper cover plate 2 through spot welding through the flanges 401.

The upper end of the side wall of the control arm body 1 is provided with a horizontal upper flanging 101, and the control arm body 1 is welded with the upper cover plate 2 through the upper flanging 101.

The bottom of the control arm body 1 is provided with a plug hole 103, and the bottom of the support plate 4 is positioned in the plug hole 103 and is subjected to plug welding with the control arm body 1.

A spring seat 102 is arranged at the center of the bottom of the control arm body 1, and the spring seat 102 is concentric with the through hole.

The distance between the connecting hole 301 and the top of the connecting plate 3 is 10-15 mm.

The bottom of the connecting plate 3 is provided with a lower flanging 303, and the connecting plate 3 is welded with the upper cover plate 2 through the lower flanging 303.

The specific working process is as follows: when the rear lower control arm is used, one end of the rear lower control arm is connected with a frame through a connecting sleeve 104, the other end of the rear lower control arm is connected with a vehicle body, an automobile shock absorber is connected with a spring seat 102 of the rear lower control arm through a shock absorption spring, and an upper cover plate 2 is further connected with a stabilizing rod on the frame through a connecting hole 301 on a connecting plate 3.

When the car takes place to jolt at the in-process of traveling, the impact force that the automobile body of car can receive passes through the bumper shock absorber and transmits to the frame on, the control arm can receive the impact earlier under the in-process back that the bumper shock absorber will impact force transmission, through the double-deck backup pad 4 of welding the U type between 1 bottom of control arm body and upper cover plate 2, can improve the joint strength of upper cover plate 2 and back lower control arm, do benefit to the evenly distributed of load, simultaneously carry out plug welding and turn-ups 401 and the upper cover plate 2 spot welding of backup pad 4 upper end setting with the consent 103 that backup pad 4 lower extreme and control arm body 1 bottom were seted up, can reduce the stress concentration of welding seam position.

Meanwhile, in order to prevent the stabilizer bar from cracking with the connecting plate 3 on the upper cover plate 2 due to continuous impact, a concave pit 302 can be arranged on one side, close to the upper cover plate 2, of the stress direction of the connecting hole 301 on the connecting plate 3, meanwhile, the distance between the connecting hole 301 and the upper end of the connecting plate 3 is increased to 10-15mm, and when the connecting hole 301 is subjected to tensile force, the stress deformation of the connecting hole 301 can be compensated through the deformation of the concave pit 302, so that the deformation amount of the connecting hole 301 is reduced, and the service life of the connecting hole 301 is prolonged.