CN215673329U

CN215673329U - Lower fork structure of shock absorber

Info

Publication number: CN215673329U
Application number: CN202120164708.6U
Authority: CN
Inventors: 王雷; 武星
Original assignee: IAT Automobile Technology Co Ltd
Current assignee: IAT Automobile Technology Co Ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2022-01-28
Anticipated expiration: 2031-01-21

Abstract

The utility model relates to a lower fork structure of a shock absorber, and belongs to the technical field of automobile design and manufacture. The lower fork structure of the shock absorber comprises a shock absorber cylinder barrel body, a hollow supporting rod and a lower fork; the lower end of the shock absorber cylinder body is provided with a lower mounting part, the hollow support rod comprises a hollow support rod body, and the lower end of the hollow support rod body is provided with a shoulder and a protruding part extending out of the shoulder; the lower fork comprises an upper mounting part and side plates positioned on two sides of the mounting part, an upper hole is formed in the upper mounting part, and the lower mounting part is in contact with and welded with the upper end face of the hollow supporting rod body; the projection is inserted into the upper hole of the upper mounting part so that the shoulder is in contact with the upper mounting part and welded. The lower fork structure of the shock absorber is beneficial to reducing the overall size of the lower fork, reducing the weight, improving the size precision of a welding assembly and ensuring the balanced stress of vertical surfaces on two sides of the lower fork.

Description

Lower fork structure of shock absorber

Technical Field

The utility model relates to the technical field of automobile design and manufacture, in particular to a lower fork structure of a shock absorber.

Background

In the shock absorber lower fork structure shown in fig. 1, a solid support rod is welded between a shock absorber cylinder and a lower fork, which is not beneficial to weight reduction; because the solid rod diameter is smaller, the area of the lower fork needs to be reduced to ensure the rigidity of the upper surface, the width is limited, and meanwhile, in order to ensure that the vertical surfaces at the two sides of the lower fork have enough bending rigidity, a thicker steel plate material needs to be used, so that the whole weight is larger;

in the shock absorber lower fork structure shown in fig. 2, the shock absorber cylinder is directly welded with the upper surface of the lower fork, and the cylinder generally has a larger outer diameter, so that a larger-size lower fork is required; and because the lower fork height is less, need increase inside and outside cylinder length, piston rod length and inside oil storage capacity of shock absorber, lead to shock absorber assembly weight great, and increase the shock absorber cost.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems in the prior art, the utility model aims to provide a lower fork structure of a shock absorber.

The utility model relates to a lower fork structure of a shock absorber, which comprises a shock absorber cylinder barrel body, a hollow supporting rod and a lower fork; the lower end of the shock absorber cylinder body is provided with a lower mounting part, the hollow support rod comprises a hollow support rod body, and the lower end of the hollow support rod body is provided with a shoulder and a protruding part extending out of the shoulder; the lower fork comprises an upper mounting part and side plates positioned on two sides of the mounting part, an upper hole is formed in the upper mounting part, and the lower mounting part is in contact with and welded with the upper end face of the hollow supporting rod body; the projection is inserted into the upper hole of the upper mounting part so that the shoulder is in contact with the upper mounting part and welded.

Wherein, the upper end of lower installation department sets up inside the lower extreme of shock absorber cylinder body.

The upper mounting part and the side plates are of an integrally formed structure, and four reinforcing structures are symmetrically arranged at the junction of the upper mounting part and the side plates.

Wherein, a through hole is arranged on the side plate.

The outer diameter of the hollow support rod body is smaller than that of the shock absorber cylinder barrel body.

Compared with the prior art, the lower fork structure of the shock absorber has the following beneficial effects:

(1) the overall size of the lower fork is reduced, and the weight is reduced;

(2) the size precision of the welding assembly can be improved, and the stress balance of vertical surfaces on two sides of the lower fork can be ensured.

Drawings

Fig. 1 is a schematic structural diagram of a lower fork structure of a shock absorber in the prior art.

Fig. 2 is a schematic structural view of another prior art damper under-fork structure.

Fig. 3 is a schematic perspective view of a lower fork structure of the shock absorber of the present invention.

Fig. 4 is a side view of the damper under-fork structure of the present invention.

Fig. 5 is a schematic sectional view along a-a of fig. 4.

Fig. 6 is an enlarged structural view of a circled portion B in fig. 5.

Fig. 7 is an enlarged structural view of a circled portion C in fig. 5.

Fig. 8 is a three-dimensional exploded view of the damper bottom fork structure of the present invention.

Fig. 9 is a side view of fig. 8.

Fig. 10 is a schematic cross-sectional view taken along the direction D-D of fig. 9.

Fig. 11 is an enlarged structural diagram of a circled portion E found in fig. 10.

Detailed Description

The damper bottom fork structure of the present invention will be further described with reference to specific embodiments to help those skilled in the art to have a more complete, accurate and thorough understanding of the technical solution of the present invention.

Example 1

As shown in fig. 3 to 11, the damper under-fork structure of the present embodiment includes a damper cylinder body 100, a hollow support rod 200, and an under-fork 300. The lower end of the shock absorber cylinder body 100 is provided with a lower mounting portion 110, and the upper end of the lower mounting portion 110 is disposed inside the lower end of the shock absorber cylinder body 100. The hollow support rod 200 includes a hollow support rod body 210, and the hollow support rod body 210 has a shoulder 220 at a lower end thereof and a protrusion 230 protruding from the shoulder 220. The lower fork 300 comprises an upper mounting part 320 and side plates located on two sides of the mounting part 320, the upper mounting part 320 and the side plates are of an integrally formed structure, and four reinforcing structures 340 are symmetrically arranged at the junction of the upper mounting part 320 and the side plates. The upper mounting portion 320 is provided with an upper hole 330, and the side plate is provided with a through hole 310 for coupling with a suspension rod bushing. The outer diameter of the hollow support rod body 210 is smaller than the outer diameter of the shock absorber cylinder body 100. The lower mounting part 110 is in contact with and welded to the upper end surface of the hollow support rod body 210; the protrusion 230 is inserted into the upper hole 330 of the upper mounting part 320 such that the shoulder 220 is in contact with the upper mounting part 320 and is welded.

In the lower fork structure of the shock absorber, the lower end of the hollow support rod is provided with the welding positioning shoulder, so that the dimensional precision of a welding assembly can be improved, and the stress balance of vertical surfaces on two sides of the lower fork is ensured; the shock absorber lower fork structure can be suitable for all shock absorber structures which are installed by adopting short lower forks, is particularly suitable for a non-drive axle double-transverse-arm suspension shock absorber structure (a drive shaft does not need to penetrate below a shock absorber), can ensure the size universality of a two-drive and four-drive (the shock absorber is shorter) configuration shock absorber or reduce the length of a cylinder barrel of a two-drive vehicle type shock absorber by adding a middle support rod, and can achieve the purpose of reducing weight while reducing cost; the lower fork adopts punch forming, and the facade sets up four additional strengthening with above junction local symmetry, and bending resistance is superior to the shaping structure of simple bending, and compares that the triangle strengthening rib occupies that the width space is little, is favorable to reducing the overall dimension of lower fork, reduction in weight.

For those skilled in the art, the specific embodiments are only exemplary descriptions of the present invention, and it is obvious that the specific implementation of the present invention is not limited by the above-mentioned manner, and various insubstantial modifications made by the technical solution of the present invention are within the protection scope of the present invention.

Claims

1. A shock absorber lower fork structure which characterized in that: comprises a shock absorber cylinder barrel body, a hollow support rod and a lower fork; the lower end of the shock absorber cylinder body is provided with a lower mounting part, the hollow support rod comprises a hollow support rod body, and the lower end of the hollow support rod body is provided with a shoulder and a protruding part extending out of the shoulder; the lower fork comprises an upper mounting part and side plates positioned on two sides of the mounting part, an upper hole is formed in the upper mounting part, and the lower mounting part is in contact with and welded with the upper end face of the hollow supporting rod body; the projection is inserted into the upper hole of the upper mounting part so that the shoulder is in contact with the upper mounting part and welded.

2. The shock absorber yoke structure as set forth in claim 1, wherein: the upper end of the lower mounting part is arranged inside the lower end of the shock absorber cylinder body.

3. The shock absorber yoke structure as set forth in claim 1, wherein: go up the installation department with the curb plate is integrated into one piece structure, just go up the installation department with curb plate juncture symmetry is provided with four additional strengthening.

4. The shock absorber yoke structure as set forth in claim 1, wherein: the side plate is provided with a through hole.

5. The shock absorber yoke structure as set forth in claim 1, wherein: the outer diameter of the hollow support rod body is smaller than that of the shock absorber cylinder barrel body.