Shock absorber structure

Abstract

The utility model discloses a shock absorber structure which comprises an outer cylinder barrel, an inner cylinder barrel coaxially arranged in the outer cylinder barrel and a piston connecting rod coaxially sleeved in the inner cylinder barrel, a top cover and a bottom cover are installed at the two ends of the outer cylinder barrel respectively, and an oil storage cavity is formed between the outer cylinder barrel and the inner cylinder barrel. One end of the inner cylinder barrel is provided with a compression valve set which extends into the bottom cover and abuts against the inner wall of the bottom cover, an oil seal guider assembly is arranged between the other end of the inner cylinder barrel and the top cover, the end, located in the inner cylinder barrel, of the piston connecting rod is provided with a recovery valve set, and the other end of the piston connecting rod penetrates through the oil seal guider assembly and extends to the outer side of the top cover. An annular positioning block is coaxially arranged between the outer cylinder barrel and the inner cylinder barrel, the outer edge of the annular positioning block is guided and positioned by the inner wall of the outer cylinder barrel, the inner edge of the annular positioning block is guided and positioned by the outer wall of the inner cylinder barrel, and a plurality of medium through holes are evenly distributed in the annular positioning block. The assembly efficiency of the shock absorber structure is improved, and noise in the operation process of the shock absorber can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a shock absorber structure. Background Art

[0002] In order to improve the driving stability of the car and the comfort of the passengers, the car suspension is usually equipped with a shock absorber. The current shock absorber usually includes an outer cylinder, an inner cylinder arranged inside the outer cylinder, and a piston rod arranged in the inner cylinder. A piston valve is fixed to the bottom of the piston rod, a bottom valve is fixed to the bottom of the inner cylinder, and an oil seal guide assembly is arranged between the top of the outer cylinder and the top of the inner cylinder. Figure 2 As shown, since the interior of the bottom cover 5 connected to the bottom of the outer cylinder 1 is usually constructed with an inclined inner wall, it is difficult for the inner cylinder 2 with the compression valve group 6 installed at one end to maintain its coaxiality with the outer cylinder 1 when it is inserted into the outer cylinder 1. During the assembly of the remaining accessories, the inner cylinder 2 is prone to shaking relative to the outer cylinder 1, thereby reducing the assembly efficiency of the shock absorber structure; and since the coaxiality of the outer cylinder 1 and the inner cylinder 2 is difficult to ensure, the friction generated by the piston connecting rod 3 during operation will also increase, resulting in loud noise during the operation of the shock absorber. Utility Model Content

[0003] To this end, the utility model provides a shock absorber structure that can solve the above-mentioned problem that the inner cylinder is difficult to coaxially position relative to the outer cylinder in the early stage of assembly, resulting in low assembly efficiency and high noise of the shock absorber.

[0004] The cam is secured to the upper and lower ends of the cam, and the cam is secured to the lower ends of the cam, with the cam being secured to the lower ends of the cam.

[0005] In an embodiment of the present invention, the annular positioning block is mounted on the outer wall of the inner cylinder through a locking member.

[0006] In an embodiment of the present invention, the medium through hole includes a ring array of guide holes a opened on the inner wall of the annular positioning block and a ring array of guide holes b opened on the outer wall of the annular positioning block. The guide holes a and the guide holes b are both open on the side away from the annular positioning block. The hole wall of the guide hole a constitutes a part of the inner wall of the annular positioning block, and the hole wall of the guide hole b constitutes a part of the outer wall of the annular positioning block.

[0007] In the embodiment of the present invention, the guide holes a and the guide holes b are staggered.

[0008] In an embodiment of the present invention, a groove is provided on the outer wall of the inner cylinder, and the locking member is a limiting clamping ring for fixing the annular positioning block on the inner cylinder, and the limiting clamping ring is clamped in the corresponding groove.

[0009] In the embodiment of the present utility model, the annular positioning blocks are arranged in two groups at the upper and lower sections of the oil storage chamber.

[0010] The utility model has the following advantages:

[0011] The utility model provides an annular positioning block between the inner cylinder and the outer cylinder to maintain the coaxiality between the outer cylinder and the inner cylinder, so that the coaxial positioning of the inner cylinder relative to the outer cylinder can be completed before the oil seal guide assembly is installed, thereby avoiding the shaking of the inner cylinder relative to the outer cylinder when the other accessories are installed, thereby improving the assembly efficiency of the shock absorber structure as a whole; and can reduce the friction suffered by the piston connecting rod during the operation, and reduce the noise generated during the operation of the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0013] Figure 2 A schematic cross-sectional view of an embodiment of the present application;

[0014] Figure 3 This is a structural schematic diagram of an annular positioning block installed on an inner cylinder according to an embodiment of the present application;

[0015] Figure 4 For the embodiment of this application Figure 3 Schematic diagram of the explosion structure;

[0016] Figure 5 This is a structural diagram of the annular positioning block according to an embodiment of the present application;

[0017] Figure 6 For the embodiment of this application Figure 2 Schematic diagram of the partial cross-sectional structure of the A-A' portion;

[0018] Figure 7 For the embodiment of this application Figure 2 Schematic diagram of the enlarged structure of part B in the middle.

[0019] In the picture:

[0020] 1-outer cylinder; 2-inner cylinder; 3-piston connecting rod; 4-top cover; 5-bottom cover; 6-compression valve group; 7-oil seal guide assembly; 8-restoration valve group; 9-annular positioning block; 10-medium through hole; 101-guide hole a; 102-guide hole b; 11-slot; 12-limiting retaining ring; 13-spring; 14-lifting ring; 15-oil storage chamber. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] In order to improve the driving stability of the car and the comfort of the passengers, shock absorbers are usually installed in the car suspension.

[0023] In the prior art, the inner cylinder of the shock absorber is usually positioned relative to the outer cylinder by an oil seal guide assembly assembled later. However, the above assembly method has the following defects:

[0024] As attached Figure 2 As shown, because the interior of the bottom cover 5 connected to the bottom of the outer cylinder 1 is typically constructed with an inclined inner wall, the inner cylinder 2, with the compression valve assembly 6 mounted on one end, has difficulty maintaining its coaxiality with the outer cylinder 1 when inserted into the outer cylinder 1. This makes it easy for the inner cylinder 2 to wobble relative to the outer cylinder 1 during installation of the remaining accessories, thereby reducing the assembly efficiency of the shock absorber structure. Furthermore, the difficulty in maintaining coaxiality between the outer and inner cylinders 1 and 2 increases friction generated by the piston connecting rod 3 during operation, resulting in loud noise during shock absorber operation.

[0025] Therefore, if Figures 1 to 7 As shown, the utility model provides a shock absorber structure, including an outer cylinder 1, an inner cylinder 2 coaxially arranged inside the outer cylinder 1, and a piston connecting rod 3 coaxially sleeved inside the inner cylinder 2, the two ends of the outer cylinder 1 are respectively installed with a top cover 4 and a bottom cover 5, an oil storage chamber 15 is formed between the outer cylinder 1 and the inner cylinder 2, one end of the inner cylinder 2 is provided with a compression valve group 6 extending into the bottom cover 5 and connected to the inner wall of the bottom cover 5, an oil seal guide assembly 7 is provided between the other end of the inner cylinder 2 and the top cover 4, the end of the piston connecting rod 3 located in the inner cylinder 2 is provided with a recovery valve group 8, the other end of the piston connecting rod 3 passes through the oil seal guide assembly 7 and extends to the outside of the top cover 4.

[0026] In the embodiment of the present invention, a spring 13 is sleeved on the piston connecting rod 3 located inside the inner cylinder 2 , and the spring 13 is arranged between the oil seal guide assembly 7 and the restoration valve group 8 .

[0027] A lifting ring 14 is also installed on the outer end of the bottom cover 5 .

[0028] At least one set of positioning guide components for maintaining the coaxiality between the outer cylinder 1 and the inner cylinder 2 is disposed between the outer wall of the inner cylinder 2 and the inner wall of the outer cylinder 1 .

[0029] In an embodiment of the present invention, the positioning and guiding assembly is an annular positioning block 9 coaxially arranged between the outer cylinder 1 and the inner cylinder 2, the outer edge of the annular positioning block 9 is guided and positioned by the inner wall of the outer cylinder 1, and the inner edge of the annular positioning block 9 is guided and positioned by the outer wall of the inner cylinder 2.

[0030] On the one hand, the above-mentioned construction of the annular positioning block 9 is conducive to the guided installation of the annular positioning block 9 relative to the outer cylinder 1 and / or the inner cylinder 2; on the other hand, the annular positioning block 9 can realize its coaxial support for the inner cylinder 2 inside the outer cylinder 1, which can avoid the horizontal shaking of the inner cylinder 2 relative to the outer cylinder 1 on the outside after the installation, thereby facilitating the positioning and installation of subsequent parts.

[0031] In some embodiments, the annular positioning block 9 is mounted on the outer wall of the inner cylinder 2 via a locking member. For example, a slot 11 is formed on the outer wall of the inner cylinder 2, and the locking member is a position-limiting snap ring 12 that secures the annular positioning block 9 to the inner cylinder 2, and the position-limiting snap ring 12 is secured in the corresponding slot 11.

[0032] In some embodiments, the annular positioning block 9 can also be fixed (such as by welding) on ​​the outer wall of the inner cylinder 2.

[0033] In actual production, the fixing method of the annular positioning block 9 relative to the inner cylinder 2 is not limited to the above embodiment.

[0034] In order to prevent the annular positioning block 9 from affecting the flow of oil in the oil storage cavity 15, in the embodiment of the present invention, a plurality of medium through holes 10 are evenly distributed on the annular positioning block 9. The medium through holes 10 can connect the oil storage cavities 15 on the upper and lower sides of the annular positioning block 9.

[0035] In some embodiments (not shown in the figures), the medium through hole 10 may be provided at the center of the annular positioning block 9 , that is, the sides of the medium through hole 10 are not open.

[0036] In the embodiment of the present utility model, Figures 3 to 6As shown, the medium through hole 10 includes a ring array of guide holes a101 opened on the inner wall of the annular positioning block 9 and a ring array of guide holes b102 opened on the outer wall of the annular positioning block 9. The guide holes a101 and the guide holes b102 are both open on the side away from the annular positioning block 9. The hole wall of the guide hole a101 constitutes a part of the inner wall of the annular positioning block 9, and the hole wall of the guide hole b102 constitutes a part of the outer wall of the annular positioning block 9.

[0037] The advantage of this arrangement is that the annular positioning block 9 is integrally formed, and its wall surface is recessed to form a corresponding medium through hole 10 area, without the need for additional holes on the annular positioning block 9, thereby simplifying the processing process of the annular positioning block 9.

[0038] In the embodiment of the present invention, the guide holes a101 and the guide holes b102 are staggered, so that the oil passing through the annular positioning block 9 is more uniform, thereby improving the stability of the annular positioning block 9 during the operation of the shock absorber and facilitating its performance.

[0039] In the embodiment of the present invention, preferably, the side walls of the annular positioning block 9 guided by the walls of the outer cylinder 1 and the inner cylinder 2 are constructed into arc shapes that cooperate with the corresponding contact walls, and the ring widths of the annular positioning block 9 in all directions are equivalent.

[0040] Preferably, in the embodiment of the present utility model, the annular positioning blocks 9 are provided in two groups at the upper and lower sections of the oil storage chamber 15 , which can improve the stability of the positioning of the inner cylinder 2 relative to the outer cylinder 1 .

[0041] The assembly method of the shock absorber structure of the utility model is:

[0042] First, two annular positioning blocks 9 are respectively installed on the upper and lower sections of the outer wall of the inner cylinder 2 through locking members, and then the compression valve group 6 is installed at the bottom end of the inner cylinder 2. Next, the inner cylinder 2 is inserted into the interior of the outer cylinder 1. The outer edges of the annular positioning blocks 9 on the inner cylinder 2 are guided by the inner wall of the outer cylinder 1, ultimately positioning the inner cylinder 2 coaxially relative to the outer cylinder 1. The compression valve group 6 at the lower end of the inner cylinder 2 abuts the inner wall of the bottom cover 5. At this point, even if the inner wall of the bottom cover 5 is tilted, the inner cylinder 2 can always maintain its coaxiality with the outer cylinder 1 due to the support of the annular positioning blocks 9.

[0043] Finally, the restoring valve assembly 8 is installed at the bottom end of the piston connecting rod 3. The piston connecting rod 3, fitted with the oil seal guide assembly 7, is then inserted into the inner cylinder 2. During this process, since the inner cylinder 2 is already positioned relative to the outer cylinder 1, it will not wobble when other components are installed, improving the assembly efficiency of the entire shock absorber structure. Furthermore, since the coaxiality of the inner cylinder 2 relative to the outer cylinder 1 is guaranteed, friction at the contact point during the subsequent operation of the piston connecting rod 3 can be reduced, thereby reducing noise.

[0044] In summary, the present invention provides a positioning guide assembly between the inner cylinder 2 and the outer cylinder 1. By providing an annular positioning block 9 on the outer wall of the inner cylinder 2 to maintain coaxiality between the outer cylinder 1 and the inner cylinder 2, and providing a medium through-hole 10 in the annular positioning block 9, the inner cylinder 2 can be positioned relative to the outer cylinder 1 before the oil seal guide assembly 7 is installed, thus preventing the inner cylinder 2 from shaking during the installation of other accessories, thereby improving the overall assembly efficiency of the shock absorber structure. It can also reduce the friction experienced by the piston connecting rod during operation and reduce the noise generated during the operation of the shock absorber.

[0045] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, such modifications or improvements, without departing from the spirit of the present invention, are within the scope of protection claimed herein.

Claims

1. A shock absorber structure, comprising an outer cylinder (1), an inner cylinder (2) coaxially arranged inside the outer cylinder (1), and a piston connecting rod (3) coaxially sleeved inside the inner cylinder (2), wherein a top cover (4) and a bottom cover (5) are respectively installed at both ends of the outer cylinder (1), an oil storage chamber (15) is formed between the outer cylinder (1) and the inner cylinder (2), a compression valve group (6) extending to the bottom cover (5) and abutting against the inner wall of the bottom cover (5) is provided at one end of the inner cylinder (2), an oil seal guide assembly (7) is provided between the other end of the inner cylinder (2) and the top cover (4), a restoring valve group (8) is provided at one end of the piston connecting rod (3) located inside the inner cylinder (2), and the other end of the piston connecting rod (3) passes through the oil seal guide assembly (7) and extends to the outside of the top cover (4), characterized in that: An annular positioning block (9) is coaxially arranged between the outer cylinder (1) and the inner cylinder (2); the outer edge of the annular positioning block (9) is guided and positioned by the inner wall of the outer cylinder (1); the inner edge of the annular positioning block (9) is guided and positioned by the outer wall of the inner cylinder (2); and a plurality of medium through holes (10) are evenly distributed on the annular positioning block (9).

2. A shock absorber structure according to claim 1, characterized in that: The annular positioning block (9) is mounted on the outer wall of the inner cylinder (2) via a locking member.

3. The shock absorber structure according to claim 1, characterized in that: The medium through hole (10) comprises an annular array of guide holes a (101) opened on the inner wall of the annular positioning block (9) and an annular array of guide holes b (102) opened on the outer wall of the annular positioning block (9). The guide holes a (101) and the guide holes b (102) are both open on a side away from the annular positioning block (9). The hole wall of the guide hole a (101) constitutes a part of the inner wall of the annular positioning block (9), and the hole wall of the guide hole b (102) constitutes a part of the outer wall of the annular positioning block (9).

4. The shock absorber structure according to claim 3, characterized in that: The guide holes a (101) and the guide holes b (102) are staggeredly distributed.

5. The shock absorber structure according to claim 2, characterized in that: The outer wall of the inner cylinder (2) is provided with a clamping groove (11), and the locking member is a limiting clamping ring (12) for fixing the annular positioning block (9) on the inner cylinder (2), and the limiting clamping ring (12) is clamped in the corresponding clamping groove (11).

6. The shock absorber structure according to claim 1, characterized in that: The annular positioning blocks (9) are arranged in two groups at the upper and lower sections of the oil storage chamber (15).

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