Automobile shock absorber guide with air seal structure

Abstract

An automobile shock absorber guide with an air-sealing structure comprises a sealing leather cover on the outer wall of the second tube body, the sealing leather cover is fitted and sealed at the outlet of the oil outlet hole; the sealing leather cover is used to control the on-off of the oil outlet hole; the outer wall of the first tube body is provided with an oil guide ring, the edge of the oil guide ring is provided with an oil guide groove, the oil guide groove is used to discharge high-pressure oil; the oil guide grooves are staggered and distributed on the outside of the sealing leather cover, and the end face of the sealing leather cover close to the first tube body is an open and closed end face; the open and closed end face is fitted to the side wall of the oil guide ring, and the oil guide ring is used to prevent high-pressure gas from rushing open the open and closed end face; the present invention uses the sealing leather cover to control the opening and closing of the oil outlet hole, so that when the oil pressure in the third tube body is too high, the sealing leather cover opens to release the oil, and when the oil pressure in the third tube body is low, the sealing leather cover remains in a closed state, thereby preventing the gas in the storage chamber from entering the cylinder pipe through the oil outlet hole.

Description

Technical Field

[0001] The invention belongs to the technical field of shock absorber production, and in particular relates to an automobile shock absorber guide with an air sealing structure. Background Art

[0002] The shock absorber is composed of a piston valve and a bottom valve that generate damping force, a cylinder body and a storage tube that store oil and gas (air), a connecting rod that transmits the movement of the vehicle body, and an oil seal that prevents internal gas or oil leakage; and, based on the piston valve, the upper part is called the piston joint upper chamber, the lower part is called the piston lower chamber, the storage tube and the cylinder; the space between the body is called the storage chamber; the piston upper chamber is always filled with oil, the lower layer of the storage chamber is filled with oil, and the upper layer is filled with air or gas (nitrogen);

[0003] A guide is installed at the top of the storage chamber. The oil piston rod runs through the guide. The guide can limit the guide rod on the one hand, and discharge high-pressure oil on the other hand to ensure stability in the cylinder.

[0004] Currently the guide is Figure 7 As shown, the exterior of the guide lacks a sealing structure. When the oil pressure in the guide is low and there is no need to drain the oil and relieve the pressure, the gas in the upper layer of the storage chamber can be injected into the guide through the oil outlet hole. The air injected into the storage chamber will affect the stability of the oil movement and destroy the dynamic balance of the oil pressure in the storage chamber, which will pose a safety hazard and affect the shock absorption effect. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an automobile shock absorbing guide with an air sealing structure. The specific technical solution is as follows:

[0006] An automobile shock-absorbing guide with an air-sealing structure comprises a guide body, wherein the guide body comprises a first tube body, a second tube body and a third tube body, wherein the first tube body, the second tube body and the third tube body are arranged in a stepped manner and their outer diameters gradually increase; an oil outlet hole is provided inside the second tube body, and the oil outlet hole is obliquely connected to the inside of the third tube body; a sealing leather cover is provided on the outer wall of the second tube body, and the sealing leather cover is fitted and sealed at the outlet of the oil outlet hole; the sealing leather cover is used to control the on-off of the oil outlet hole;

[0007] The outer wall of the first tube body is provided with an oil guide ring, and an oil guide groove is opened at the edge of the oil guide ring, and the oil guide groove is used to discharge high-pressure oil; the oil guide grooves are staggered and distributed on the outside of the sealing leather sleeve, and the end face of the sealing leather sleeve close to the first tube body is an open and closed end face; the open and closed end face is attached to the side wall of the oil guide ring, and the oil guide ring is used to prevent high-pressure gas from rushing open the open and closed end face.

[0008] Furthermore, the sealing leather sleeve includes a movable ring and a fixed ring, the hardness of the movable ring is smaller than that of the fixed ring, the fixed ring is arranged close to the third tube body, the movable ring is arranged close to the first tube body, the end face of the movable ring close to the first tube body is the opening and closing end face, and the movable ring is attached to the outer wall of the oil outlet hole; the movable ring is used to be stretched open when the oil pressure at the oil outlet hole is high; and the movable ring is used to be reset when the oil pressure at the oil outlet hole is low.

[0009] Furthermore, the movable collar and the fixed collar are continuous integrated structures, the fixed collar has a circular tube cross section, the movable collar has a truncated cone cross section, and the thickness of the movable collar gradually decreases in the direction from the second tube body to the first tube body.

[0010] Furthermore, a limiting convex ring is provided on the inner wall of one end of the fixing ring close to the third tube body, and a limiting ring groove is provided on the outer wall of the second tube body, and the limiting convex ring is embedded in the limiting ring groove.

[0011] Furthermore, the oil guide grooves are distributed in a circular array, and the distribution center of the oil guide grooves is located on the center line of the sealing leather sleeve.

[0012] Furthermore, the first tube body is fitly embedded in the top inner wall of the cylinder tube, the third tube body is fitly installed on the top inner wall of the storage tube, the top end face of the cylinder tube is the first clamping face, the step surface between the second tube body and the first tube body is the second clamping face, the oil guide ring is fitly placed between the first clamping face and the second clamping face, and the oil guide ring is arranged perpendicular to the first tube body.

[0013] Furthermore, the outer end surface of the oil guide ring is in contact with the inner wall of the storage tube.

[0014] The beneficial effects of the present invention are:

[0015] 1. The sealing leather sleeve is used to control the opening and closing of the oil outlet hole. When the oil pressure in the third tube body is too high, the sealing leather sleeve is opened to release the oil. When the oil pressure in the third tube body is low, the sealing leather sleeve remains closed, thereby preventing the gas in the storage chamber from entering the guide through the oil outlet hole at low pressure, ensuring the stability of the piston rod movement and eliminating safety hazards.

[0016] 2. The oil guide ring reduces the amount of gas entering the sealing sleeve on the basis that the high-pressure oil can be discharged normally;

[0017] 3. Since the gas can only flow upward through the oil guide groove, the gas can only move around the periphery of the sealing leather sleeve and will not impact the opening and closing end surface. The oil guide ring can further prevent the gas from entering the guide and extend the service life of the sealing leather sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a vehicle shock absorbing guide with an air sealing structure according to the present invention is shown;

[0019] Figure 2 A schematic diagram of the connection structure of the guide body, the oil guide ring and the sealing leather sleeve of the present invention is shown;

[0020] Figure 3 It shows a schematic diagram of the cross-sectional structure of the connection between the first pipe body, the oil guide ring and the storage pipe of the present invention;

[0021] Figure 4 A schematic diagram of the structure of the guide body in the oil discharge state of the present invention is shown;

[0022] Figure 5 Shows Figure 4 A schematic diagram of the enlarged structure at point A;

[0023] Figure 6 Shows Figure 4 A schematic diagram of the enlarged structure at B;

[0024] Figure 7 A schematic diagram of the prior art structure in the background technology is shown;

[0025] As shown in the figure: 1. storage tube, 11. storage chamber, 2. cylinder tube, 21. oil storage chamber, 3. guide body, 31. first tube body, 32. second tube body, 321. oil outlet hole, 322. limiting ring groove, 33. third tube body, 4. oil guide ring, 41. oil guide groove, 5. sealing leather sleeve, 51. movable ring, 52. fixed ring, 521. limiting convex ring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The automobile shock-absorbing guide with an air-sealing structure comprises a guide body 3, wherein the guide body 3 comprises a first tube body 31, a second tube body 32 and a third tube body 33, wherein the first tube body 31, the second tube body 32 and the third tube body 33 are arranged in a stepped manner and their outer diameters gradually increase; an oil outlet hole 321 is provided inside the second tube body 32, and the oil outlet hole 321 is obliquely connected to the inside of the third tube body 33; the oil outlet hole 321 is used to discharge the high-pressure oil inside the third tube body 33;

[0028] The outer wall of the second tube body 32 is provided with a sealing leather sleeve 5, and the sealing leather sleeve 5 is fitted and blocked at the outlet of the oil outlet hole 321; the sealing leather sleeve 5 is used to control the on-off of the oil outlet hole 321; the sealing leather sleeve 5 is used to control the opening and closing of the oil outlet hole 321, so that when the oil pressure in the third tube body 33 is too high, the sealing leather sleeve 5 is opened to release the oil, and when the oil pressure in the third tube body 33 is low, the sealing leather sleeve 5 remains in a closed state, thereby preventing the gas in the storage chamber 11 from entering the cylinder tube 2 through the oil outlet hole 321, ensuring the stability of the piston rod movement and eliminating safety hazards;

[0029] The outer wall of the first tube body 31 is sleeved with an oil guide ring 4, and an oil guide groove 41 is opened at the edge of the oil guide ring 4, and the oil guide groove 41 is used to discharge high-pressure oil; the oil guide grooves 41 are staggered and distributed on the outside of the sealing leather sleeve 5, and the end face of the sealing leather sleeve 5 close to the first tube body 31 is an open-closed end face; the open-closed end face is an oil discharge end face, and the high-pressure oil can be discharged from the gap between the open-closed end face and the first tube body 31; the open-closed end face is designed to be close to one end of the first tube body 31, so that the discharged oil can be discharged directly downward without contaminating the sealing leather sleeve 4;

[0030] The opening and closing end face is fitted to the side wall of the oil guide ring 4, and the oil guide ring 4 is used to prevent high-pressure gas from rushing open the opening and closing end face; the oil guide ring 4 can reduce the amount of gas entering the sealing leather sleeve 5, and the oil guide ring 4 can be used to achieve normal oil discharge while preventing high-pressure gas from directly impacting the opening and closing end face. Since the gas can only flow upward through the oil guide groove 41, the gas can only move on the periphery of the sealing leather sleeve 5 and will not impact the opening and closing end face; if there is no protection of the oil guide ring 4, when the high-pressure gas moves upward, the opening and closing end face of the sealing leather sleeve 5 will directly contact the gas, and the sealing leather sleeve 5 is likely to open a gap under the impact of the gas, so that the gas is poured into the oil outlet hole 321 from the gap, and the opening and closing end face is often opened and closed, and its own strength is low. If it lacks protection, it is easy to be rushed open by the airflow, causing the sealing leather sleeve to fail; the opening and closing end face is fitted with the oil guide ring 4, and the discharged high-pressure oil can also directly enter the oil guide groove 41 of the oil guide ring 4 without turbulence.

[0031] As an improvement of the above technical solution, the sealing leather sleeve 5 includes a movable sleeve 51 and a fixed sleeve 52. The hardness of the movable sleeve 51 is less than that of the fixed sleeve 52. The fixed sleeve 52 is arranged close to the third tube body 33, and the movable sleeve 51 is arranged close to the first tube body 31. The fixed sleeve 52 is used for positioning, which can ensure that the sealing leather sleeve 5 can be firmly sleeved on the outside of the second tube body 32, and the fixed sleeve 52 will not be deformed, and always maintain a firmly sleeved state. The low hardness of the movable sleeve 51 is used to facilitate the deformation of the movable sleeve 51, so that the discharge process of the high-pressure oil is easier and more stable.

[0032] The end face of the movable collar 51 close to the first tube body 31 is the opening and closing end face, and the movable collar 51 is attached to the outer wall of the oil outlet hole 321; the movable collar 51 is used to be opened to release oil when the oil pressure at the oil outlet hole is high; the movable collar 51 is used to be closed when the oil pressure at the oil outlet hole 321 is low; when the oil pressure is very high, the movable collar 51 will be opened, so that the high-pressure oil is discharged through the gap between the oil outlet hole 321, the movable collar 51 and the second tube body 32, and finally discharged into the storage chamber 11 through the oil guide groove 41; when the oil pressure is low, the oil pressure at the oil outlet hole 321 is not enough to offset the restoring elastic force of the movable collar 51, and the movable collar 51 cannot be opened, and the movable collar 51 will shrink and reset, thereby closing the oil outlet hole 321 again to prevent air from entering during the low-pressure stage.

[0033] As an improvement of the above technical solution, the movable ring 51 and the fixed ring 52 are continuous integrated structures, the cross-section of the fixed ring 52 is a circular tube, the cross-section of the movable ring 51 is a truncated cone, and the thickness of the movable ring 51 gradually decreases in the extension direction from the second tube body 32 to the first tube body 31; the movable ring 51 adopts a truncated cone structure to reduce the restoring elastic force of the movable ring 51 while ensuring that the composition of the entire preparation material remains unchanged, so that the opening of the movable ring 51 is simpler, and it is easy to produce and low in cost; on the other hand, the truncated cone structure can minimize the width of the opening and closing end face, thereby further reducing the contact area between the opening and closing end face and the airflow, avoiding gas entry, and the gas will move upward along the outer wall inclined surface of the movable ring 51 when moving upward, and will not affect the sealing state of the opening and closing end face.

[0034] As an improvement of the above technical solution, a limiting convex ring 521 is provided on the inner wall of one end of the fixing ring 52 close to the third tube body 33, and a limiting ring groove 322 is provided on the outer wall of the second tube body 32, and the limiting convex ring 521 is embedded in the limiting ring groove 322; the cooperation between the limiting convex ring 521 and the limiting ring groove 322 can further improve the fixing strength of the fixing ring 52, ensure that the sealing leather cover 5 will not loosen, and extend the service life; on the other hand, since the connection strength between the fixing ring 52 and the second tube body 32 is higher, it can further prevent the side where the fixing ring 52 is located from being stretched open by the high-pressure oil, thereby ensuring the stability of oil discharge.

[0035] The movable sleeve ring 51 and the fixed sleeve ring 52 are both made of rubber material; the rubber material is easy to manufacture, has low cost and good sealing effect.

[0036] As an improvement of the above technical solution, the oil guide grooves 41 are distributed in an annular array, and the distribution center of the oil guide grooves 41 is located on the center line of the sealing leather sleeve 5; the annular distribution is used to achieve rapid discharge of high-pressure oil at various positions, and being located on the same center line is used to ensure that each oil guide groove 41 is staggered with the sealing leather sleeve 5 in the contracted state.

[0037] As an improvement of the above technical solution, the first tube body 31 is fitly embedded in the top inner wall of the cylinder tube 2, the third tube body 33 is fitly installed on the top inner wall of the storage tube 1, the top end face of the cylinder tube 2 is the first clamping face, the step surface between the second tube body 32 and the first tube body 31 is the second clamping face, the oil guide ring 4 is fitly placed between the first clamping face and the second clamping face, and the oil guide ring 4 is vertically arranged to the first tube body 31; the end face of the second tube body 32 and the end face of the cylinder tube 2 can be used to stably clamp and fix the oil guide ring 4 to prevent the oil guide ring 4 from loosening.

[0038] As an improvement of the above technical solution, the outer end surface of the oil guide ring 4 is in contact with the inner wall of the storage tube 1, so as to prevent the entry of external gas to the greatest extent, so that the flow of gas and oil is smoother and more orderly.

[0039] like Figure 1 As shown, Figure 1 A schematic structural diagram of a vehicle shock absorbing guide with an air sealing structure according to the present invention is shown;

[0040] The first tube body 31, the second tube body 32 and the third tube body 33 are arranged in a stepped manner from bottom to top, the first tube body 31 has the smallest diameter and the third tube body 33 has the largest diameter; the outer wall of the third tube body 33 is closely fitted with the inner wall of the storage tube 1, and the outer wall of the first tube body 31 is fitted with the inner wall of the cylinder tube 2; the second tube body 32 is arranged at a distance from the storage tube 1, and the inner top of the cylinder tube 2 is the oil storage chamber 21, and the oil storage chamber 21 can fill the oil into the first tube body 31;

[0041] The piston rod passes through the center line of the guide body 3, and a blocking block is provided on the inner wall of the top end of the cylinder tube 2. The blocking block can block the top opening of the third tube body 33 to prevent the oil from flowing out of this opening.

[0042] The cavity area between the storage tube 1 and the cylinder tube 2 is a storage chamber 11, and the storage chamber 11 contains gas and oil;

[0043] The oil guide ring 4 is vertically mounted on the outer wall of the first tube body 31 , the top surface of the oil guide ring 4 is in contact with the second clamping surface, the bottom surface is in contact with the first clamping surface, and the horizontal side surface of the oil guide ring 4 is in contact with the inner wall of the storage tube 1 .

[0044] Figure 2 A schematic diagram of the connection structure of the guide body, the oil guide ring and the sealing leather sleeve of the present invention is shown;

[0045] The outer wall of the oil guide ring 4 is provided with oil guide grooves 41 distributed in a circular array. The sealing leather sleeve 5 includes a movable collar 51 and a fixed collar 52. The movable collar 51 is in a truncated cone shape, and the fixed collar 52 is in a cylindrical shape.

[0046] When the present invention is implemented, when the piston rod moves downward, the oil in the oil storage chamber 21 moves downward, the oil pressure in the guide body 3 is at a low value, the sealing leather cover 5 is not subjected to too much impact force, the sealing leather cover 5 remains in a state of being fitted with the second tube body 32, the movable collar 51 blocks the oil outlet 321, and the gas in the storage chamber 11 moves upward to the outside of the second tube body 32 through the oil guide groove 41. When the airflow moves upward, it will stagger with the opening and closing end surface of the movable collar 51, so that the movable sleeve 51 is not subjected to force and remains in a sealed state; due to the obstruction of the sealing leather cover 5, external gas will not enter the oil outlet 321; when the oil pressure is low and the oil is not discharged, the external gas will not enter the guide body 3;

[0047] When the piston rod moves upward first, the oil in the oil storage chamber 21 will enter the second tube body 32 and the third tube body 33 from the first tube body 31, and finally the oil will gather in the third tube body 33. In the process of continuous gathering, the oil pressure gradually increases, and the opening force on the movable collar 51 also gradually increases. When the opening force is greater than the restoring elastic force of the movable collar 51, the movable collar 51 is opened and transformed into an umbrella-shaped structure, and the high-pressure oil flows obliquely downward to the movable collar 51 through the oil outlet hole 321, flows out through the gap between the movable collar 51 and the second tube body 32, and then flows downward into the storage chamber 11 through the oil guide groove 41, so as to realize the pressure relief of the cylinder tube 2; and in the above-mentioned oil relief process, the oil outlet hole 321 is always filled with high-pressure oil, and external air cannot enter;

[0048] When the oil pressure drops again, the movable collar 51 will gradually return to its original position until the oil outlet hole 321 is closed again.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automobile shock-absorbing guide with an air-sealing structure, comprising a guide body (3), the guide body (3) comprising a first tube body (31), a second tube body (32) and a third tube body (33), the first tube body (31), the second tube body (32) and the third tube body (33) being arranged in a step-like manner and having gradually increasing outer diameters; an oil outlet hole (321) is provided inside the second tube body (32), and the oil outlet hole (321) is obliquely connected to the inside of the third tube body (33); the characteristics are: The outer wall of the second tube body (32) is provided with a sealing leather sleeve (5), and the sealing leather sleeve (5) is fitted and sealed at the outlet of the oil outlet hole (321); the sealing leather sleeve (5) is used to control the on and off of the oil outlet hole (321); An oil guide ring (4) is sleeved on the outer wall of the first tube body (31), and an oil guide groove (41) is provided at the edge of the oil guide ring (4), and the oil guide groove (41) is used to discharge high-pressure oil; the oil guide grooves (41) are staggered and distributed on the outer side of the sealing leather sleeve (5), and an end face of the sealing leather sleeve (5) close to the first tube body (31) is an open end face; the open end face is attached to the side wall of the oil guide ring (4), and the oil guide ring (4) is used to prevent high-pressure gas from breaking through the open end face; The sealing leather sleeve (5) comprises a movable collar (51) and a fixed collar (52); the hardness of the movable collar (51) is smaller than that of the fixed collar (52); the fixed collar (52) is arranged close to the third tube body (33); the movable collar (51) is arranged close to the first tube body (31); the end surface of the movable collar (51) close to the first tube body (31) is the opening and closing end surface; the movable collar (51) is attached to the outer wall of the oil outlet hole (321); the movable collar (51) is used to be stretched open when the oil pressure at the oil outlet hole is high; the movable collar (51) is used to be reset when the oil pressure at the oil outlet hole (321) is low; The oil guide grooves (41) are distributed in a circular array, and the distribution center of the oil guide grooves (41) is located on the center line of the sealing leather sleeve (5).

2. The automobile shock absorbing guide with an air sealing structure according to claim 1, characterized in that: The movable collar (51) and the fixed collar (52) are of a continuous integrated structure; the fixed collar (52) has a circular tube-shaped cross section, the movable collar (51) has a truncated cone-shaped cross section, and the thickness of the movable collar (51) gradually decreases in the direction in which the second tube body (32) extends toward the first tube body (31).

3. The automobile shock absorbing guide with an air sealing structure according to claim 1 or 2, characterized in that: A limiting convex ring (521) is provided on the inner wall of one end of the fixing ring (52) close to the third tube body (33), and a limiting ring groove (322) is provided on the outer wall of the second tube body (32), and the limiting convex ring (521) is embedded in the limiting ring groove (322).

4. The automobile shock absorbing guide with an air sealing structure according to claim 1, characterized in that: The first tube body (31) is fitted and embedded in the top inner wall of the cylinder tube (2), the third tube body (33) is fitted and installed on the top inner wall of the storage tube (1), the top end face of the cylinder tube (2) is a first clamping face, the step surface between the second tube body (32) and the first tube body (31) is a second clamping face, the oil guide ring (4) is fitted and placed between the first clamping face and the second clamping face, and the oil guide ring (4) is arranged perpendicular to the first tube body (31).

5. The automobile shock absorbing guide with an air sealing structure according to claim 4, characterized in that: The outer end surface of the oil guide ring (4) is in contact with the inner wall of the storage tube (1).

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