A kind of upper support seat structure of automobile rear shock absorber

Abstract

The present invention relates to an upper support seat structure of a rear shock absorber of an automobile, comprising a main support, wherein the main support comprises a cylindrical portion, a pad integrally arranged in the cylindrical portion, and mounting portions symmetrically arranged on both sides of the cylindrical portion, wherein an upper baffle is riveted on the upper portion of the cylindrical portion, wherein a first cavity and a second cavity are formed on the upper and lower sides of the pad, and a first through hole is further arranged on the inner wall, wherein the first cavity is connected with the second cavity through the first through hole; a rubber main spring is arranged in the first cavity, wherein the rubber main spring comprises an inner skeleton and a rubber body, wherein a second through hole connected to a piston rod of a shock absorber is arranged in the middle of the inner skeleton; wherein the rubber body is respectively interference-fitted with the upper baffle and the main support in the axial direction and the radial direction; wherein the upper support of the rear shock absorber meets the requirements of strength, NVH performance, fatigue performance, etc. while meeting the requirements of lightness.

Description

Technical Field

[0001] The invention belongs to the field of vehicle suspension, and in particular to the field of an upper supporting structure of a vehicle rear shock absorber. Background Art

[0002] The lightweight of automobiles means to reduce the curb weight of automobiles as much as possible under the premise of ensuring the strength and safety performance of automobiles, so as to improve the power of automobiles, reduce fuel consumption and reduce exhaust pollution. Experiments have shown that if the weight of automobiles is reduced by half, fuel consumption will also be reduced by nearly half. Due to the needs of environmental protection and energy saving, the lightweight of automobiles has become a trend in the development of automobiles in the world. One of the main ways is to use lightweight new materials. The upper support of the shock absorber is an indispensable and most important component in the automobile suspension system. Its main function is to bear the vertical load transmitted from the suspension to the vehicle body, and to bear the control and impact loads. At the same time, the steering function of the vehicle is ensured by the rotation of the bearing. In addition, to ensure the accuracy of steering, the shock absorber piston rod must have the ability to deflect. The most important point is to provide seismic isolation for the passenger compartment and ensure that the shock absorber assembly does not generate noise during use. In order to meet the requirements of lightweight and low cost and ensure the performance and strength of the suspension system during research and development, the front and rear upper supports are increasingly using high-pressure cast aluminum main brackets. Through product design, lightweight and low cost are guaranteed while meeting strength requirements. Summary of the invention

[0003] In order to solve the above problems, the present invention achieves the above objectives through the following technical solutions:

[0004] A structure for an upper support seat of a rear shock absorber of an automobile comprises a main support, wherein the main support comprises a cylindrical portion, a pad integrally arranged in the cylindrical portion, and mounting portions symmetrically arranged on both sides of the cylindrical portion, wherein an upper baffle is riveted on the upper portion of the cylindrical portion, and a first cavity and a second cavity are formed on the upper and lower sides of the pad, and a first through hole is further arranged on the inner wall, wherein the first cavity is connected with the second cavity through the first through hole; a rubber main spring is arranged in the first cavity, and the rubber main spring consists of an inner skeleton and a rubber body, and a second through hole connected to a piston rod of the shock absorber is arranged in the middle of the inner skeleton; and the rubber body is interference fit with the upper baffle and the main support in the axial direction and radial direction respectively.

[0005] As a further optimization scheme of the present invention, a protrusion is provided on the inner wall of the first cavity, a recessed portion of the same size as the protrusion is provided on the upper part of the outer side surface of the rubber body, and a slope structure is provided on the lower part; such a structure facilitates assembly, improves the stability of product performance, and prevents irregular deformation of the rubber body during assembly.

[0006] As a further optimization scheme of the present invention, a snap-fit ​​structure is provided on the bottom of the inner wall of the second cavity; the snap-fit ​​structure can prevent the buffer block on the shock absorber from falling off and solve the problem of abnormal sound at the matching point of the buffer block and the bracket.

[0007] As a further optimization solution of the present invention, a reinforcing rib is provided between the cylindrical portion and the mounting portion; the structural strength of the mounting portion can be improved, and the reliability of the main bracket can be enhanced.

[0008] As a further optimization scheme of the present invention, the main bracket is made of cast aluminum AlSi12Fe by high-pressure casting; through the high-pressure casting process, the production efficiency is improved; the cost is reduced, the weight is reduced, the strength is met and the elongation can reach a certain requirement, and the product assembly and riveting process requirements are met.

[0009] As a further optimization solution of the present invention, the upper baffle is a sheet metal part.

[0010] The beneficial effects of the present invention are:

[0011] One end of the main bracket in the present invention can limit the rubber body without adding a limit plate separately; the other end is designed with a pad, which is equivalent to a buffer block mounting seat, and there is no need to design a buffer block pad separately, so the structure is more compact and easy to install;

[0012] The rear shock absorber and upper support in the present invention can meet the requirements of strength, NVH performance, fatigue performance, etc. while meeting the requirements of lightness;

[0013] The structure has reasonable design, simple structure, stable performance, and is easier to control in terms of quality. It is suitable for small and medium-sized cars that want to reduce weight and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic cross-sectional view of the structural principle of the present invention;

[0015] Figure 2 It is a schematic diagram of the main support structure of the present invention;

[0016] Figure 3 It is a schematic diagram of the structure of the rubber main spring of the present invention;

[0017] Figure 4 is an isometric view of the present invention;

[0018] In the figure: 1. main bracket; 11. cylindrical portion; 12. pad; 121. first through hole; 13. mounting portion; 14. reinforcing rib; 2. upper baffle; 3. first cavity; 31. protrusion; 4. second cavity; 41. snap-fit ​​structure; 5. rubber main spring; 51. inner skeleton; 511. second through hole; 52. rubber body; 521. recessed portion; 522. inclined surface structure. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] like Figures 1 to 4 The upper support seat structure of the rear shock absorber of an automobile shown in the figure comprises a main support 1, an upper baffle 2, and a rubber main spring 5.

[0021] The main bracket 1 is made of cast aluminum AlSi12Fe by high-pressure casting. The high-pressure casting process improves production efficiency, reduces costs, reduces weight, meets strength requirements and can achieve certain elongation requirements, meeting product assembly and riveting process requirements;

[0022] The main bracket 1 comprises a cylindrical portion 11, a pad 12 is integrally provided in the cylindrical portion, mounting portions 13 are symmetrically provided on both sides of the cylindrical portion, the shock absorber is fixedly connected to the vehicle frame via the mounting portions, and a reinforcing rib 14 is provided between the cylindrical portion 11 and the mounting portions 13;

[0023] In addition, an upper baffle 2 is riveted on the upper part of the cylindrical part 11. The upper baffle 2 is designed as a sheet metal part to meet certain strength requirements and is riveted to the main bracket 1. On the one hand, it has a limiting effect on the rubber body and prevents the shock absorber rod from passing through the bracket when the rubber body fails.

[0024] The upper and lower sides of the backing plate 12 form a first cavity 3 and a second cavity 4. The backing plate 12 is also provided with a first through hole 121, and the first cavity 3 is connected with the second cavity 4 through the first through hole 121; a rubber main spring 5 is provided in the first cavity 3, and the rubber main spring 5 is composed of an inner frame 51 and a rubber body 52;

[0025] Among them, the rubber main spring is a bushing structure without a jacket. In order to meet the strength requirements, the inner frame 51 adopts high-strength QSTE500TM and above materials;

[0026] In order to meet the NVH performance, the rubber body 52 is interference-fitted with the upper baffle 2 and the cylindrical portion 11 in the axial direction and radial direction respectively;

[0027] A second through hole 511 connected to the piston rod of the shock absorber is provided in the middle of the inner frame 51; the first through hole and the second through hole form a passage for the shock absorber rod of the shock absorber to pass through;

[0028] In order to facilitate assembly and ensure the stability of product performance, prevent the rubber body 52 from irregular deformation during assembly, and ensure the stability of product performance, a protrusion 31 is provided on the inner wall of the first cavity 3, and a recessed portion 521 of the same size as the protrusion 31 is provided on the upper part of the outer side surface of the rubber body 52, and an inclined surface structure 522 is provided on the lower part;

[0029] In order to prevent the buffer block on the top of the shock absorber from falling off and solve the problem of abnormal sound at the matching position of the buffer block and the bracket, a buckle structure 41 is provided on the bottom of the inner side wall of the second cavity 4;

[0030] In the present invention, one end of the main bracket can limit the rubber body without adding a limit plate separately; one end is designed with a buffer block mounting seat, and there is no need to design a buffer block pad separately;

[0031] Assembly relationship in the present invention:

[0032] First, the inner skeleton 51 and the rubber body 52 are vulcanized into the rubber main spring 5, and then the rubber main spring 5 is press-fitted into the cylindrical portion of the main bracket 1, and an interference fit is achieved in the radial direction. Finally, the upper baffle 2 is placed in the upper end of the main bracket 1 and a clearance fit is achieved. At the same time, the rubber main spring 5 and the cylindrical portion 11 are interference fit in the axial direction. The main bracket 1, the rubber main spring 5, and the upper baffle 2 are riveted together and assembled into one body by a riveting device to form an upper support structure of the rear shock absorber.

[0033] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An upper support structure of a rear shock absorber of an automobile, comprising a main support (1), characterized in that: The main bracket (1) comprises a cylindrical portion (11), a pad (12) integrally arranged in the cylindrical portion (11), and mounting portions (13) symmetrically arranged on both sides of the cylindrical portion (11); an upper baffle (2) is riveted on the upper portion of the cylindrical portion (11); a first cavity (3) and a second cavity (4) are formed on the upper and lower sides of the pad (12); a first through hole (121) is further provided on the pad (12); the first cavity (3) is connected to the second cavity (4) through the first through hole (121); a rubber main spring (5) is provided in the first cavity (3); the rubber main spring (5) is composed of an inner frame (51) and a rubber body (52); a second through hole (511) connected to a piston rod of a shock absorber is provided in the middle of the inner frame (51); the rubber body (52) is interference fit with the upper baffle (2) and the cylindrical portion (11) in the axial direction and the radial direction respectively; A protrusion (31) is provided on the inner side wall of the first cavity (3), a recess (521) having the same size as the protrusion (31) is provided on the upper portion of the outer side surface of the rubber body (52), and an inclined surface structure (522) is provided on the lower portion.

2. The upper support seat structure of the rear shock absorber of an automobile according to claim 1, characterized in that: A buckle structure (41) is provided on the bottom of the inner side wall of the second cavity (4).

3. The upper support seat structure of the rear shock absorber of an automobile according to claim 1, characterized in that: A reinforcing rib (14) is provided between the cylindrical portion (11) and the mounting portion (13).

4. The upper support seat structure of the rear shock absorber of an automobile according to claim 1, characterized in that: The main support (1) is made of cast aluminum AlSi12Fe by high-pressure casting.

5. The upper support seat structure of the rear shock absorber of an automobile according to claim 1, characterized in that: The upper baffle (2) is a sheet metal part.

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