Screw plug of shock absorber

Abstract

The utility model belongs to the technical field of shock absorber accessories, and particularly relates to a shock absorber screw plug which comprises a screw plug body, and a guide cylinder is arranged in the center of the bottom of the screw plug body. The vent hole is formed in the screw plug located outside the peripheral side of the guide cylinder; a plurality of auxiliary vent holes vertically penetrate through the periphery of the center of the pressing sleeve in an array mode; the deflation column is arranged in the deflation hole in a manner of moving up and down; the flange is located in the limiting hole, and a plurality of exhaust notches are formed in the flange in an array mode; the stabilizing column is located in the through hole, the stabilizing column located between the bottom of the flange and the top wall of the pressing sleeve is sleeved with a reset spring, and the problems that in the exhaust process, gas is exhausted upwards from a gap between the through hole and the stabilizing column and finally exhausted out of the screw plug from a gap between the stabilizing hole and the pressing column, the whole exhaust amount is small, and the exhaust efficiency is low are solved; and the radial size of the bottom of the screw plug is large, so that the screw plug additionally occupies the limited space in the port of the outer cylinder after being assembled to the port of the outer cylinder, and the screw plug is not easy to adapt to a large-specification damping spring.

Description

Technical Field

[0001] This utility model belongs to the technical field of shock absorber accessories, specifically relating to a shock absorber screw plug. Background Technology

[0002] The shock absorber plug is an important component of a motorcycle shock absorber. It is assembled at the outer cylinder port of the shock absorber. Its main function is to seal the upper port of the shock absorber and prevent the hydraulic oil inside the shock absorber from leaking out. However, since the hydraulic oil inside the shock absorber heats up during operation, hot air is generated inside the shock absorber. Therefore, a vent hole needs to be provided on the shock absorber plug to release the hot air inside the shock absorber.

[0003] For example, a leak-proof shock absorber plug with application number CN202320672420.9 includes a plug with a vent hole. The vent hole includes an assembly hole, a limiting hole, and a stabilizing hole arranged sequentially from bottom to top, and the assembly hole, limiting hole, and stabilizing hole are connected through each other. An adjusting rod is movably arranged up and down inside the vent hole. The adjusting rod includes a stabilizing column, a flange platform, and a pressing column arranged sequentially from bottom to top. The upper surface of the flange platform is provided with an assembly groove, and a second sealing ring is provided in the assembly groove. The upper surface of the second sealing ring is in contact with the stepped wall at the intersection of the limiting hole and the stabilizing hole. An annular assembly groove is provided on the pressing column, and a first sealing ring is provided in the annular assembly groove. The outer peripheral sidewall of the first sealing ring is in contact with the wall of the stabilizing hole.

[0004] However, there is a problem with the use of this shock absorber plug: during the venting process, the gas is discharged upward from the gap between the through hole and the stabilizing post, and finally discharged from the plug through the gap between the stabilizing post and the pressing post. The total venting volume is small and the venting efficiency is low. In addition, the radial dimension of the bottom of the plug is large, which means that after it is assembled into the outer cylinder port, it will occupy the limited space inside the outer cylinder port and is not easy to adapt to large-size shock absorber springs. Utility Model Content

[0005] Based on the problems mentioned in the background art above, this utility model provides a shock absorber plug to solve the problem that during the exhaust process, gas is discharged upward from the gap between the through hole and the stabilizing column, and finally discharged out of the plug from the gap between the stabilizing hole and the pressing column. The overall exhaust volume is small and the exhaust efficiency is low. In addition, the radial dimension of the bottom of the plug is large, which means that after being assembled into the outer cylinder port, it will occupy the limited space inside the outer cylinder port and is not easy to adapt to large-specification shock absorber springs.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A shock absorber plug, comprising:

[0008] A screw plug, wherein a guide cylinder is provided at the center of the bottom of the screw plug, and the radial dimension of the guide cylinder is half the radial dimension of the screw plug;

[0009] A vent hole is provided on a screw plug located on the outer periphery of the guide cylinder. The vent hole includes a sealing hole, a limiting hole, and a screw hole arranged sequentially from top to bottom. The radial dimensions of the sealing hole, the limiting hole, and the screw hole gradually increase to form a stepped hole.

[0010] A pressure sleeve is screwed into a screw hole. A through hole is provided in the center of the pressure sleeve, and multiple auxiliary vent holes are arranged vertically around the center of the pressure sleeve.

[0011] A venting column is movably disposed within a venting hole. The venting column includes a sealing column, a flange, and a stabilizing column arranged sequentially from top to bottom. The peripheral wall of the sealing column and the wall of the sealing hole are both fitted conical walls. A sealing rubber ring is disposed on the peripheral wall of the sealing column through a sealing ring groove. The outer peripheral wall of the sealing rubber ring and the wall of the sealing hole are both fitted conical walls. The peripheral wall of the sealing column and the outer peripheral wall of the sealing rubber ring are both in contact with the wall of the sealing hole.

[0012] The flange is located inside the limiting hole, and multiple venting notches are arranged in an array on the flange; the stabilizing post is located inside the through hole, and a reset spring is sleeved on the stabilizing post located between the bottom of the flange and the top wall of the pressure sleeve.

[0013] Based on the above technical solution, the present invention has made the following improvements:

[0014] Furthermore, the sealing hole wall, the sealing column peripheral wall, and the sealing rubber ring outer peripheral wall are all conical surfaces that are smaller at the top and larger at the bottom.

[0015] Furthermore, a countersunk hole is provided at the top of the through hole, and the bottom of the reset spring is located inside the countersunk hole.

[0016] Furthermore, each of the aforementioned secondary vent holes is vertically connected at the intersection of the peripheral wall and the bottom wall of the countersunk hole.

[0017] Furthermore, the screw plug and the guide cylinder are provided with a through mounting hole at their center.

[0018] The beneficial effects of this utility model are:

[0019] 1. Through the provided vent hole, vent column, secondary vent hole, exhaust notch, as well as conical sealing column, conical sealing hole, and conical sealing rubber ring, the secondary vent hole allows hot air to enter the limiting hole at any time. When the sealing column is pressed down, the conical sealing column and conical sealing rubber ring can disengage from their contact with the conical sealing hole, causing the conical sealing column, conical sealing rubber ring, and conical sealing hole to form an oblique flow channel. At this time, hot air can enter the oblique flow channel through the exhaust notch and be discharged outside the piston, thereby increasing the overall exhaust volume and improving exhaust efficiency.

[0020] 2. By setting a guide tube, and the radial dimension of the guide tube is half the radial dimension of the screw plug, its overall structure becomes smaller, so that after it is assembled to the outer cylinder port, the bottom of the screw plug will not occupy too much internal space of the outer cylinder, so that large-specification shock-absorbing springs can be assembled around the guide tube. Attached Figure Description

[0021] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0022] Figure 1 This is a structural diagram of a shock absorber screw plug according to the present invention;

[0023] Figure 2 This is a cross-sectional view of a shock absorber plug according to the present invention;

[0024] Figure 3 This is a cross-sectional view of the pressure sleeve in the screw plug of a shock absorber according to this utility model;

[0025] Figure 4 This is a structural diagram of the vent column in the screw plug of a shock absorber according to the present invention;

[0026] Figure 5 This is a top view of the vent column in the screw plug of a shock absorber according to the present invention;

[0027] Figure 6 This is an assembly drawing of a shock absorber screw plug according to the present invention.

[0028] The attached diagram is labeled as follows:

[0029] 101. Plug; 102. Guide tube; 103. Mounting hole; 2. Vent hole; 201. Sealing hole; 202. Limiting hole; 203. Threaded hole; 3. Vent column; 301. Sealing column; 302. Stabilizing column; 303. Sealing ring groove; 304. Flange; 4. Sealing rubber ring; 501. Pressure sleeve; 502. Through hole; 503. Countersunk hole; 504. Secondary vent hole; 6. Vent notch; 7. Return spring. Detailed Implementation

[0030] like Figures 1-6 As shown, a shock absorber plug includes:

[0031] The screw plug 101 has a guide tube 102 at its bottom center. A mounting hole 103 is provided through the center of the screw plug 101 and the guide tube 102. The mounting hole 103 can be used to assemble the piston rod and the adjusting screw. The radial dimension of the guide tube 102 is half the radial dimension of the screw plug 101, which makes the overall bottom structure of the screw plug 101 smaller. This means that after the screw plug 101 is assembled at the outer cylinder port, the bottom of the screw plug 101 will not occupy too much internal space of the outer cylinder. This allows for the assembly of large-sized shock-absorbing springs around the guide tube 102. At the same time, the guide tube 102 can connect to the end of the shock-absorbing spring, which plays a role in limiting and stabilizing the shock-absorbing spring.

[0032] Vent hole 2 is provided on the screw plug 101 located on the outer side of the guide cylinder 102. Vent hole 2 includes a sealing hole 201, a limiting hole 202 and a screw hole 203 arranged sequentially from top to bottom. The radial dimensions of the sealing hole 201, the limiting hole 202 and the screw hole 203 gradually increase to form a stepped hole.

[0033] Pressure sleeve 501 is screwed into screw hole 203. Pressure sleeve 501 has a through hole 502 in the center. Multiple secondary vent holes 504 are arranged vertically around the center of pressure sleeve 501. A countersunk hole 503 is provided at the top of through hole 502. Each secondary vent hole 504 is arranged vertically at the intersection of the peripheral wall and bottom wall of countersunk hole 503. The arrangement of each secondary vent hole 504 can facilitate the entry of hot air into limiting hole 202 at any time, and prevent hot air from entering limiting hole 202 only from the gap between stabilizing column 302 and through hole 502.

[0034] A vent column 3 is movably disposed within the vent hole 2. The vent column 3 includes, from top to bottom, a sealing column 301, a flange 304, and a stabilizing column 302. The peripheral wall of the sealing column 301 and the wall of the sealing hole 201 are both fitted conical walls. A sealing rubber ring 4 is provided on the peripheral wall of the sealing column 301 through a sealing ring groove 303. The outer peripheral wall of the sealing rubber ring 4 and the wall of the sealing hole 201 are both fitted conical walls. The sealing hole 2... The wall of hole 201, the peripheral wall of sealing column 301, and the outer peripheral wall of sealing rubber ring 4 are all conical surfaces with a smaller top and a larger bottom. The peripheral wall of sealing column 301 and the outer peripheral wall of sealing rubber ring 4 are all in contact with the wall of sealing hole 201. When the peripheral wall of sealing column 301 and the outer peripheral wall of sealing rubber ring 4 are in contact with the wall of sealing hole 201, hot air can be blocked. At this time, hot air cannot be discharged from between the peripheral wall of sealing column 301, the outer peripheral wall of sealing rubber ring 4 and the wall of sealing hole 201.

[0035] The flange 304 is located inside the limiting hole 202, and multiple exhaust notches 6 are arrayed on the flange 304; the stabilizing column 302 is located inside the through hole 502, and a return spring 7 is sleeved on the stabilizing column 302 located between the bottom of the flange 304 and the top wall of the pressure sleeve 501, and the bottom of the return spring 7 is located inside the countersunk hole 503. The return spring 7 can push the flange 304, so that the venting column 3 maintains an upward trend, and causes the peripheral wall of the sealing column 301, the outer peripheral wall of the sealing rubber ring 4 and the hole wall of the sealing hole 201 to maintain a tight fit, so as to block the hot air entering the limiting hole 202;

[0036] When exhaust is required, pressing the sealing post 301 downwards causes the peripheral wall of the conical sealing post 301 to disengage from the outer peripheral wall of the conical sealing rubber ring 4 and from the wall of the conical sealing hole 201. This causes the conical sealing post 301, the conical sealing rubber ring 4, and the conical sealing hole 201 to form an oblique flow channel. At this time, the hot air in the limiting hole 202 enters the oblique flow channel through the exhaust notch 6 and then exits outside the piston. Through the auxiliary vent 504, the exhaust notch 6, and the oblique flow channel formed by the interval, the total exhaust volume can be increased and the exhaust efficiency can be improved.

[0037] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A shock absorber plug, characterized in that: include: A screw plug (101) has a guide cylinder (102) at the bottom center, and the radial dimension of the guide cylinder (102) is half the radial dimension of the screw plug (101). Vent hole (2), the vent hole (2) is provided on the screw plug (101) located on the outer side of the guide cylinder (102), the vent hole (2) includes a sealing hole (201), a limiting hole (202) and a screw hole (203) arranged sequentially from top to bottom, the radial dimensions of the sealing hole (201), the limiting hole (202) and the screw hole (203) gradually increase to form a stepped hole; A pressure sleeve (501) is screwed into a screw hole (203). A through hole (502) is provided in the center of the pressure sleeve (501). Multiple auxiliary vent holes (504) are arranged vertically around the center of the pressure sleeve (501). The venting column (3) is movable up and down inside the venting hole (2). The venting column (3) includes a sealing column (301), a flange (304), and a stabilizing column (302) arranged sequentially from top to bottom. The peripheral wall of the sealing column (301) and the wall of the sealing hole (201) are both fitted conical walls. A sealing rubber ring (4) is provided on the peripheral wall of the sealing column (301) through a sealing ring groove (303). The outer peripheral wall of the sealing rubber ring (4) and the wall of the sealing hole (201) are both fitted conical walls. The peripheral wall of the sealing column (301) and the outer peripheral wall of the sealing rubber ring (4) are both in contact with the wall of the sealing hole (201). The flange (304) is located inside the limiting hole (202), and multiple exhaust notches (6) are arranged in an array on the flange (304); the stabilizing column (302) is located inside the through hole (502), and a reset spring (7) is sleeved on the stabilizing column (302) located between the bottom of the flange (304) and the top wall of the pressure sleeve (501).

2. The shock absorber plug according to claim 1, characterized in that: The sealing hole (201) wall, the sealing column (301) peripheral wall, and the sealing rubber ring (4) outer peripheral wall are all conical surfaces with a smaller upper part and a larger lower part.

3. The shock absorber plug according to claim 1, characterized in that: The top of the through hole (502) is provided with a countersunk hole (503), and the bottom of the reset spring (7) is located inside the countersunk hole (503).

4. A shock absorber plug according to claim 3, characterized in that: Each of the aforementioned secondary vent holes (504) is vertically connected at the intersection of the peripheral wall and the bottom wall of the countersunk hole (503).

5. A shock absorber plug according to claim 1, characterized in that: The screw plug (101) and the guide tube (102) are provided with a through mounting hole (103).

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