CN201800473U - Automobile lower suspension arm structure - Google Patents

Abstract

The utility model discloses an automobile bottom swing arm structure, which aims to provide a high strength and reliable automobile bottom swing arm structure. The structure is welded by the upper body of the lower swing arm and the lower body of the lower swing arm. The cross section of the lower body of the lower swing arm is U-shaped, and the opposite sides of the middle part extend outward to form the left connecting end and the right connecting end. between the left and right connections. The utility model is provided with a left connection end and a right connection end, which is convenient for connection and installation, and the overall structure is closed, which effectively improves the overall strength of the lower swing arm and improves the safety performance of the whole vehicle.

Description

A car bottom swing arm structure

technical field

The utility model relates to an automobile body structure, in particular to an automobile lower swing arm structure.

Background technique

The lower swing arm of the automobile chassis suspension is a connecting piece used to form the connection between the frame or sub-frame and the wheel. Usually, the lower swing arm has three connection ends, two of which are connected to the frame or sub-frame, and the other One connecting end is connected with the steering knuckle via a ball pin. When the car is turning, the steering knuckle drives the wheel hub to rotate around the first connecting end of the lower swing arm, and the lower swing arm connects the steering knuckle and sub-frame, controls the suspension, and performs parameter positioning and load transmission during the movement. At present, the commonly used lower swing arm has a base and a cover plate welded together, the base section is U-shaped, and the cover plate is a half-opening part. The problems of this structure are: 1. Because the cover plate is a semi-opening part, there is no cover plate connection at one end, and the force is mainly concentrated on the cover plate on one side, which is easy to cause local force, and its strength is weak. When the stress is strong, the lower swing arm is easy to deform, which makes the whole vehicle have certain safety hazards. 2. Because the cover plate is a semi-open part, the damping spring installed on the lower swing arm only has one side limit, and the damping spring has the hidden danger of falling out from the other side.

Contents of the invention

The purpose of the utility model is to solve the problems of insufficient overall strength and unreliable limit of the lower swing arm of the automobile, and provide a structure of the lower swing arm of the automobile with high strength and high reliability.

The technical scheme adopted by the utility model to solve the technical problem is: a lower swing arm structure of an automobile, which is welded by the upper body of the lower swing arm and the lower body of the lower swing arm, and is characterized in that the lower body of the lower swing arm has a U-shaped section, and the middle part The opposite two sides extend outward to form a left connection end and a right connection end, and the upper body of the lower swing arm is a flat plate, which is arranged between the left connection end and the right connection end. The U-shaped structure of the lower body of the lower swing arm is easy to form, and the setting of the left and right connecting ends is convenient for connecting with other parts. The upper body of the lower swing arm covers the opening between the left connection end and the right connection end of the lower body of the lower swing arm, forming an enveloping shape, which can effectively improve the strength of the entire lower swing arm.

Preferably, the middle part of the upper body of the lower swing arm is provided with a shock-absorbing spring limiting hole, and a boss for positioning is provided on the left side. The damping spring limiting hole is coaxially opened with the damping spring installation hole, and the upper end of the damping spring is limited. The boss is connected with the corresponding device, and plays a position-limiting effect on the whole lower swing arm.

As a preference, the left connecting end of the lower body of the lower swing arm is provided with a mounting bracket for connecting the vehicle frame, and the right connecting end is provided with a round pin mounting hole. A mounting bracket is provided on the left connection end to facilitate the connection of the lower swing arm with the vehicle frame or sub-frame, and a round pin mounting hole is provided at the right connection end to facilitate the installation of the round pin.

Preferably, the bottom surface of the lower body of the lower swing arm is provided with a shock absorbing spring installation hole coaxially arranged with the shock absorbing spring limiting hole. Facilitates the connection of the shock spring to the lower arm.

Preferably, the upper body of the lower swing arm is a plate of equal thickness. The thickness is uniform everywhere, so that the force is balanced everywhere, and it is convenient for stamping and forming.

The utility model is formed by welding the lower body of the lower swing arm with a U-shaped cross-section and the upper body of the lower swing arm of the flat plate with connecting ends on both sides, which can effectively improve the overall strength of the lower swing arm and facilitate installation and fixing. .

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Mounting bracket, 2. Left connecting end, 3. Boss, 4. Shock absorbing spring installation hole, 5. Shock absorbing spring limit hole, 6. Upper body of lower swing arm, 7. Lower body of lower swing arm, 8 , Right connecting end, 9, round pin installation hole.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through specific embodiments in conjunction with the accompanying drawings.

Example:

A lower swing arm structure for automobiles, as shown in Figure 1, comprising a lower swing arm upper body 6 and a lower swing arm lower body 7, the lower swing arm lower body 7 has a U-shaped cross section, and the opposite sides of the middle part extend outward to form a left connecting end 2 and a right connecting end End 8, 2 on the left connecting end are provided with mounting bracket 1, and mounting bracket 1 is connected with vehicle frame or auxiliary frame, and right connecting end 8 is provided with round pin mounting hole 9, and round pin mounting hole 9 installs round pin. A damping spring installation hole 4 is provided on the bottom surface of the lower body of the lower swing arm. The upper body 6 of the lower swing arm is a flat plate, and the middle part of the flat plate is provided with a shock-absorbing spring limit hole 5. The damping spring is mounted on the hole 4 and passes through the damping spring limit hole 5 to limit the upper end of the damping spring. The left side is provided with a boss 3, and the boss 3 is connected with the fixing device of the vehicle body, and plays a position-limiting effect on the whole lower swing arm.

The lower swing arm upper body 6 edge and the lower swing arm lower body 7 are welded to form a lower swing arm structure. Since the structure of the lower swing arm is closed as a whole, the original semi-closed connection is improved, and the overall strength of the lower swing arm is effectively improved. the

Claims (5)

1. Swing arm structure under a kind of automobile, by swing arm upper body (6) and following swing arm lower body (7) are welded down, it is characterized in that, described swing arm lower body (7) cross section down becomes the U shape, relative both sides, middle part stretch out and form left coupling end (2) and right coupling end (8), described swing arm upper body (6) down is a flat part, is arranged between left coupling end (2) and the right coupling end (8).

2. Swing arm structure under the automobile according to claim 1 is characterized in that, middle part, described swing arm upper body down is provided with damping spring spacing hole (5), and the left side is provided with the boss (3) of a location usefulness.

3. Swing arm structure under the automobile according to claim 1 is characterized in that, described swing arm lower body left side coupling end (2) down is provided with the mounting bracket (1) that is used to connect vehicle frame, and right coupling end (8) is provided with round pin mounting hole (9).

4. Swing arm structure under the automobile according to claim 1 and 2 is characterized in that, described swing arm lower body (7) bottom surface down is provided with the damping spring mounting hole (4) with the coaxial setting of damping spring spacing hole (5).

5. Swing arm structure under the automobile according to claim 1 and 2 is characterized in that, described swing arm upper body down is the uniform thickness flat part.