Pressure regulating and buffering structure of shock absorber

Abstract

The utility model discloses a pressure regulating and buffering structure of a shock absorber, which aims at changing an outer valve body assembly and an inner valve body assembly into a split structure, reducing the size of a fixed seat and being small in processing difficulty, and adopts the technical scheme that the pressure regulating and buffering structure of the shock absorber comprises a base for mounting a first hydraulic cylinder and a second hydraulic cylinder, a first oil passing hole is formed in the groove bottom of the groove, the first oil passing hole is connected with a first hydraulic cylinder and the groove, a second oil passing hole is formed in the groove wall of the groove, the second oil passing hole is connected with a second hydraulic cylinder and the groove, and the valve further comprises an inner valve body assembly and an outer valve body assembly. The inner valve body assembly and the outer valve body assembly are arranged in the groove in a spaced mode in the direction away from the first oil passing hole, and the second oil passing hole is located between the inner valve body assembly and the outer valve body assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of shock absorbers, and more specifically relates to a pressure regulating buffer structure of a shock absorber. Background Art

[0002] The nitrogen shock absorber needs to be equipped with a pressure-adjusting buffer structure to adjust the damping. For example, patent CN108757810A discloses a shock absorber, the technical solution of which includes a piston rod, a first hydraulic cylinder, a base and a second hydraulic cylinder; the first hydraulic cylinder is filled with oil for buffering; it also includes a hydraulic buffer assembly fixed inside the base; the hydraulic buffer assembly includes a fixed seat, a connector, a regulating valve, an upper valve body, a lower valve body and a piston assembly; an oil inlet hole is provided on the side of the fixed seat; a spring is sleeved on the upper valve body; an oil outlet hole and a through hole are provided on the regulating block; the interior of the lower valve body is hollow and connected to the oil pipe, the interior of the upper valve body is also hollow, and the caliber of the lower valve body at the junction of the upper valve body and the lower valve body is smaller than the radius of the upper valve body;

[0003] In the above-mentioned buffer assembly, all structures of the buffer assembly are connected to the fixing seat. Therefore, the outer wall precision of the entire fixing seat needs to be relatively high to ensure the sealing effect, and the processing cost is relatively high. Utility Model Content

[0004] The main purpose of the utility model is to provide a shock absorber pressure regulating buffer structure, aiming to transform the outer valve body component and the inner valve body component into a split structure, reduce the size of the fixing seat, and reduce the processing difficulty.

[0005] According to a first aspect of the utility model, a shock absorber pressure regulating and buffering structure is provided, comprising a base for mounting a first hydraulic cylinder and a second hydraulic cylinder, the base being provided with a groove, the bottom of the groove being provided with a first oil hole, the first oil hole connecting the first hydraulic cylinder and the groove, the groove wall of the groove being provided with a second oil hole, the second oil hole connecting the second hydraulic cylinder and the groove, and also comprising an inner valve body assembly and an outer valve body assembly, the inner valve body assembly and the outer valve body assembly being arranged in the groove at intervals in a direction away from the first oil hole, and the second oil hole being located between the inner valve body assembly and the outer valve body assembly.

[0006] In the above-mentioned shock absorber pressure regulating and buffering structure, the inner valve body assembly includes a piston flange threadedly connected in the groove, the piston flange is provided with an oil inlet hole cooperating with the outer valve body assembly, a plurality of oil drain holes are provided on the piston flange around the oil inlet hole, an annular baffle is movably provided on the side of the piston flange facing away from the outer valve body, the annular baffle blocks the oil drain hole, and a wave spring is provided between the annular baffle and the bottom of the groove.

[0007] In the above-mentioned shock absorber pressure regulating buffer structure, an annular positioning cover is provided on the side of the piston flange facing away from the outer valve body assembly, and the annular positioning cover is supported between the groove bottom of the groove and the piston flange to locate the position of the piston flange;

[0008] The annular baffle is located between the piston flange and the annular positioning cover, and the wave spring is located between the annular baffle and the annular positioning cover.

[0009] In the above-mentioned shock absorber pressure regulating buffer structure, the outer valve body assembly includes a fixing seat threadedly connected in the groove, a hollow connecting body is inserted in the fixing seat, a piston body is sleeved on one end of the connecting body close to the inner valve body assembly, the piston body is a hollow structure, the piston body is in contact with the piston flange, and the oil inlet hole is connected to the interior of the piston body;

[0010] A spring is sleeved on the connecting body, and the other end of the spring abuts against the piston body;

[0011] An oil injection hole is arranged on the peripheral wall of the connecting body, and the oil injection hole is communicated with the interior of the connecting body.

[0012] In the above-mentioned shock absorber pressure regulating buffer structure, the interior of the connecting body is divided into a first cavity, a second cavity and a third cavity in sequence along the direction close to the piston flange, the inner diameters of the first cavity and the third cavity are both larger than the inner diameter of the second cavity, and the oil injection hole is connected to the first cavity;

[0013] An adjusting body is threadedly connected in the first cavity so that the adjusting body can move along its axial direction. A cone is provided at one end of the adjusting body close to the second cavity, and the cone can be inserted into the second cavity.

[0014] In the above-mentioned shock absorber pressure regulating and buffering structure, a hole for a wrench to engage is provided at one end of the regulating body away from the cone.

[0015] In the above-mentioned shock absorber pressure regulating and buffering structure, a dust cover is detachably mounted on one end of the fixing seat away from the groove.

[0016] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0017] In the utility model, the outer valve body assembly and the inner valve body assembly are not fixed on a fixed seat, but are split structures, so that the size of the fixed seat is smaller, and the matching part between the fixed seat and the base is also smaller, the processing difficulty is much smaller, and the cost is effectively reduced; and because it is a split structure, the sealing structures of the outer valve body assembly and the inner valve body assembly are separate, the sealing effect is better, and the base is not prone to oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0020] Figure 2 It is a structural cross-sectional view of the first embodiment of the utility model;

[0021] Figure 3 The first embodiment of the utility model Figure 2 A partial enlarged view of A.

[0022] Among them, the reference numerals of each figure are:

[0023] 1. Base; 2. Groove; 3. First oil hole; 4. Second oil hole; 5. Inner valve body assembly; 51. Piston flange; 52. Oil inlet hole; 53. Oil drain hole; 54. Annular baffle; 55. Wave spring; 56. Annular positioning cover; 6. Outer valve body assembly; 61. Fixed seat; 62. Connecting body; 621. First cavity; 622. Second cavity; 623. Third cavity; 63. Piston body; 64. Spring; 65. Oil filling hole; 66. Adjusting body; 661. Hole position; 67. Cone; 7. Dust cover. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0026] Reference Figures 1 to 3 As shown, in one embodiment of the utility model, a shock absorber pressure regulating buffer structure includes a base 1 for mounting a first hydraulic cylinder and a second hydraulic cylinder, a groove 2 is provided on the base 1, a first oil hole 3 is provided on the bottom of the groove 2, the first oil hole 3 connects the first hydraulic cylinder and the groove 2, a second oil hole 4 is provided on the groove wall of the groove 2, the second oil hole 4 connects the second hydraulic cylinder and the groove 2, and also includes an inner valve body assembly 5 and an outer valve body assembly 6, the inner valve body assembly 5 and the outer valve body assembly 6 are arranged in the groove 2 at intervals in a direction away from the first oil hole 3, and the second oil hole 4 is located between the inner valve body assembly 5 and the outer valve body assembly 6;

[0027] The outer valve body assembly 6 and the inner valve body assembly 5 are not fixed on a fixed seat 61, but are a split structure, which makes the size of the fixed seat 61 smaller, so the matching part of the fixed seat 61 and the base 1 is also smaller, the processing difficulty is much smaller, and the cost is effectively reduced; and because it is a split structure, the sealing structure of the outer valve body assembly 6 and the inner valve body assembly 5 are independent, the sealing effect is better, and the base 1 is not prone to oil leakage.

[0028] Specifically, the inner valve body assembly 5 includes a piston flange 51 threadedly connected in the groove 2, an oil inlet hole 52 cooperating with the outer valve body assembly 6 is provided on the piston flange 51, a plurality of oil drain holes 53 are provided on the piston flange 51 around the oil inlet hole 52, an annular baffle 54 is movably provided on the side of the piston flange 51 facing away from the outer valve body, the annular baffle 54 blocks the oil drain holes 53, and also includes a wave spring 55, an annular positioning cover 56 is provided on the side of the piston flange 51 facing away from the outer valve body assembly 6, the annular positioning cover 56 is supported between the groove bottom of the groove 2 and the piston flange 51 to locate the position of the piston flange 51; the annular baffle 54 is located between the piston flange 51 and the annular positioning cover 56, and the wave spring 55 is located between the annular baffle 54 and the annular positioning cover 56;

[0029] The outer valve body assembly 6 includes a fixing seat 61 threadedly connected to the groove 2, a hollow connecting body 62 is inserted into the fixing seat 61, a piston body 63 is sleeved on one end of the connecting body 62 close to the inner valve body assembly 5, the piston body 63 is a hollow structure, the piston body 63 is in contact with the piston flange 51, the oil inlet hole 52 is connected with the inside of the piston body 63, a spring 64 is sleeved on the connecting body 62, and the other end of the spring 64 is in contact with the piston body 63; the piston body 63 is made of an elastomer, so that oil cannot enter the oil inlet hole 52 from the outside of the piston body 63, and can only enter the oil inlet hole 52 from the inside of the piston body 63;

[0030] An oil injection hole 65 is provided on the peripheral wall of the connecting body 62, and the oil injection hole 65 is communicated with the interior of the connecting body 62;

[0031] The second oil hole 4 can transport the oil of the second hydraulic cylinder to the groove 2, and the groove 2 then injects the oil into the interior of the connecting body 62 through the oil injection hole 65. The connecting body 62 transports the oil to the oil inlet hole 52 through the interior of the piston body 63, and the oil inlet hole 52 then transports the oil to the first hydraulic cylinder through the first oil hole 3. When the oil flows in the opposite direction, it is basically the same path.

[0032] The difference is that when the oil needs to be delivered to the first hydraulic cylinder as quickly as possible, the oil pressure in the groove 2 is relatively large. At this time, the oil pressure can break through the elastic force of the wave spring 55, allowing the wave spring 55 to leave the piston flange 51, so that the oil drain hole 53 is open, and the oil can quickly pass through the oil drain hole 53 into the first oil hole 3. When the oil pressure decreases, the wave spring 55 is reset and can cover the oil drain hole 53 again.

[0033] When the oil needs to return to the second hydraulic cylinder quickly, the oil pressure in the first oil hole 3 is relatively large, so that the oil can push the piston body 63 away when returning from the oil inlet hole 52, so that the piston body 63 is separated from the piston flange 51, thereby achieving the function of rapid oil return.

[0034] In this embodiment, the interior of the connecting body 62 is divided into a first cavity 621, a second cavity 622 and a third cavity 623 in sequence along the direction close to the piston flange 51. The inner diameters of the first cavity 621 and the third cavity 623 are both larger than the inner diameter of the second cavity 622. The oil injection hole 65 is connected to the first cavity 621.

[0035] An adjusting body 66 is threadedly connected in the first cavity 621. By rotating the adjusting body 66, the adjusting body 66 can move along its axial direction. A cone 67 is provided at one end of the adjusting body 66 close to the second cavity 622. The cone 67 can be inserted into the second cavity 622. By adjusting the depth of the cone 67 entering the second cavity 622, the gap between the second cavity 622 and the cone 67 can be controlled, thereby controlling the speed of oil delivery.

[0036] In this embodiment, a hole 661 for a wrench to fit is provided at one end of the adjusting body 66 away from the cone 67. The hole 661 may be a hexagonal groove, and the adjusting body 66 may be rotated by using a hexagonal wrench.

[0037] In this embodiment, a dust cover 7 is detachably mounted on one end of the fixing seat 61 away from the groove 2 . The dust cover 7 is threadedly connected to the fixing seat 61 . When necessary, the dust cover 7 can be unscrewed to rotate the adjusting body 66 .

[0038] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A shock absorber pressure regulating buffer structure, comprising a base for mounting a first hydraulic cylinder and a second hydraulic cylinder, the base is provided with a groove, the bottom of the groove is provided with a first oil hole, the first oil hole connects the first hydraulic cylinder and the groove, the groove wall of the groove is provided with a second oil hole, the second oil hole connects the second hydraulic cylinder and the groove, characterized in that: It also includes an inner valve body assembly and an outer valve body assembly, wherein the inner valve body assembly and the outer valve body assembly are arranged in the groove at intervals in a direction away from the first oil hole, and the second oil hole is located between the inner valve body assembly and the outer valve body assembly.

2. The shock absorber pressure regulating and buffering structure according to claim 1, characterized in that: The inner valve body assembly includes a piston flange threadedly connected in the groove, the piston flange is provided with an oil inlet hole cooperating with the outer valve body assembly, a plurality of oil drain holes are provided on the piston flange around the oil inlet hole, an annular baffle is movably provided on the side of the piston flange facing away from the outer valve body, the annular baffle blocks the oil drain hole, and a wave spring is provided between the annular baffle and the bottom of the groove.

3. The shock absorber pressure regulating and buffering structure according to claim 2, characterized in that: An annular positioning cover is provided on the side of the piston flange facing away from the outer valve body assembly, and the annular positioning cover is supported between the groove bottom of the groove and the piston flange to locate the position of the piston flange; The annular baffle is located between the piston flange and the annular positioning cover, and the wave spring is located between the annular baffle and the annular positioning cover.

4. The shock absorber pressure regulating and buffering structure according to claim 2, characterized in that: The outer valve body assembly comprises a fixing seat threadedly connected in the groove, a hollow connecting body is inserted in the fixing seat, a piston body is sleeved on one end of the connecting body close to the inner valve body assembly, the piston body is a hollow structure, the piston body is in contact with the piston flange, and the oil inlet hole is communicated with the interior of the piston body; A spring is sleeved on the connecting body, and the other end of the spring abuts against the piston body; An oil injection hole is arranged on the peripheral wall of the connecting body, and the oil injection hole is communicated with the interior of the connecting body.

5. The shock absorber pressure regulating and buffering structure according to claim 4, characterized in that: The interior of the connecting body is divided into a first cavity, a second cavity and a third cavity in sequence along the direction close to the piston flange, the inner diameters of the first cavity and the third cavity are both larger than the inner diameter of the second cavity, and the oil injection hole is connected to the first cavity; An adjusting body is threadedly connected in the first cavity so that the adjusting body can move along its axial direction. A cone is provided at one end of the adjusting body close to the second cavity, and the cone can be inserted into the second cavity.

6. The shock absorber pressure regulating buffer structure according to claim 5, characterized in that: One end of the adjusting body away from the cone is provided with a hole for a wrench to fit.

7. The shock absorber pressure regulating and buffering structure according to claim 4, characterized in that: A dust cover is detachably mounted on one end of the fixing base away from the groove.

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