CN211259452U

CN211259452U - Novel shock absorber

Info

Publication number: CN211259452U
Application number: CN201922271920.8U
Authority: CN
Inventors: 郑彤
Original assignee: Taizhou Huangyan Tongbao Vehicle Parts Co ltd
Current assignee: Taizhou Huangyan Tongbao Vehicle Parts Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-08-14
Anticipated expiration: 2029-12-17

Abstract

The utility model provides a novel shock absorber belongs to shock attenuation equipment technical field. The shock absorber solves the problems that in the existing shock absorber, the shock absorbing cylinder and the shock absorbing rod are relatively fast in opposite telescopic resetting speed, the telescopic resetting action is relatively hard, and the whole shock absorbing effect is not good. When the damping cylinder and the damping rod of the novel damper are axially and relatively compressed, oil in the main oil cavity flows to the middle oil cavity through the outer oil cavity and the inner oil cavity through the one-way valve; when the shock absorber cylinder and the shock absorber rod are reset relatively in the axial direction, oil in the middle oil cavity flows through the inner oil cavity and the outer oil cavity through the oil return hole and flows to the main oil cavity, and a control device capable of controlling the oil return amount of the oil return hole to enable the shock absorber cylinder and the shock absorber rod to reset, damp and absorb energy is arranged on the shock absorber cylinder. The utility model has the advantages of reasonable design, simply, controlling means structural design is comparatively stable, can the size of effective control oil gallery oil return volume, electrodeless adjusting device convenient to use, and the adjusting position is comparatively accurate, enables damper cylinder, shock attenuation pole damping energy-absorbing that resets, and the whole shock attenuation of bumper shock absorber is effectual.

Description

Novel shock absorber

Technical Field

The utility model belongs to the technical field of shock attenuation equipment, a novel bumper shock absorber is related to.

Background

Shock absorbers are used to improve driving comfort by absorbing vibrations generated during driving or stopping. The shock absorbers in the current market, in particular to the shock absorbers on electric vehicles and motorcycles, are all composed of springs and spring rods. When the road condition is not good or in emergency, the spring in the damping system bears increased pressure, and the spring is easy to damage.

Therefore, people often install a cushion rubber pad in the spring, and the damage of the spring is reduced by utilizing the supporting and buffering functions of the cushion rubber pad on the spring, so that the service life of the spring is prolonged. Therefore, a shock absorber appears in the market, for example, the Chinese patent numbers are as follows: "201821172301.2" a bumper shock absorber before high strength, its concrete structure includes damper cylinder and shock attenuation pole, and this shock attenuation pole is flexible for damper cylinder axial elasticity, and the shock attenuation pole is hollow structure, and the one end of shock attenuation pole has set firmly the end cap, and the other end of shock attenuation pole wears to locate the damper cylinder in and between the other end of this shock attenuation pole and the damper cylinder be provided with the locating lever that prevents the shock attenuation pole and break away from the damper cylinder, the one end of locating lever is worn to establish in the other end of shock attenuation pole and is linked firmly with the shock attenuation pole, the other end of locating lever with the damper cylinder link firmly, be provided with the spring in the shock attenuation pole, the one end elasticity of spring support by on the locating lever, the other end elasticity of spring support by on the end cap, be equipped with sealing device between the inner wall of damper cylinder and the outer wall of shock attenuation.

In the structure, when the shock absorbing cylinder and the shock absorbing rod are axially compressed and matched, the relative compression shock absorbing effect of the shock absorbing cylinder and the shock absorbing rod is better, but the shock absorbing rod and the shock absorbing rod are not arranged between the shock absorbing cylinder and the shock absorbing rod, and the shock absorbing cylinder and the shock absorbing rod have higher opposite telescopic resetting speed and harder telescopic resetting action, so that the overall shock absorbing effect of the shock absorber is influenced; this damper cylinder and shock attenuation pole are when stretching out and drawing back in opposite directions and reseing, through the elasticity direct action of spring, carry out the flexible reseing of damper cylinder, shock attenuation pole, and long-time cumulative use leads to the fatigue degree of spring to accelerate, and life is shorter.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a structural design is reasonable, simple, can control damper cylinder, shock attenuation pole and reset flexible oil return volume big, little, and can make damper cylinder, shock attenuation pole damping energy-absorbing that resets through the oil pressure, novel bumper shock absorber that the shock attenuation is effectual.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a novel shock absorber, includes damper cylinder and shock attenuation pole, the damper cylinder in set firmly the locating lever with the axial, locating lever and damper cylinder radial interval cooperation form main oil pocket, main oil intracavity be provided with compression damping spring, the shock attenuation pole for hollow structure and this damper rod in set firmly interior damping tube with the axial, damper rod and interior damping tube radial interval cooperation form outer oil pocket, one end cover of damper cylinder locate the one end of shock attenuation pole, the one end of damper cylinder set firmly with shock attenuation pole axial sliding seal complex oil blanket, when damper cylinder and shock attenuation pole are connected relatively and the one end of this locating lever wears to locate the one end of interior damping tube, the one end of locating lever set firmly with interior damping tube axial sliding seal complex check valve and this check valve make interior damping tube form the interior oil pocket, the one end of interior damping tube set firmly with locating lever axial sliding seal complex uide bushing and this uide bushing, The one-way valve is axially matched with the damping cylinder at intervals to form a middle oil cavity, a reset buffer spring is arranged in the middle oil cavity, the main oil cavity is communicated with the outer oil cavity through a side hole axially arranged on the guide sleeve, the outer oil cavity is communicated with the inner oil cavity through an oil through hole radially arranged on the pipe wall of the inner damping pipe, the inner oil cavity is communicated with the middle oil cavity through a one-way valve, an oil return hole for communicating the middle oil cavity with the inner oil cavity is further arranged on the one-way valve, and when the damping cylinder and the damping rod are axially compressed relatively, oil in the main oil cavity flows to the middle oil cavity through the outer oil cavity and the inner oil cavity through the one-way valve; when the shock-absorbing cylinder and the shock-absorbing rod are reset relatively in the axial direction, oil in the middle oil cavity flows through the inner oil cavity and the outer oil cavity through the oil return hole and flows to the main oil cavity, and a control device capable of controlling the oil return amount of the oil return hole to enable the shock-absorbing cylinder and the shock-absorbing rod to reset and absorb energy is arranged on the shock-absorbing cylinder.

The novel shock absorber is mainly characterized in that a control device is arranged on a shock absorbing cylinder, the oil return amount of an oil return hole is adjusted and controlled through the control device, the oil return amount of the oil return hole directly influences the pressure effect of oil, when the oil return amount of oil flowing into an inner oil cavity from an oil cavity is reduced through the control device, the oil flowing from the oil cavity to the inner oil cavity has a damping effect, namely the oil pressure of the oil offsets the elastic part of a compression shock absorbing spring, so that the shock absorbing cylinder and a shock absorbing rod are slowed in opposite telescopic reset speeds, the telescopic reset action is soft, and the whole shock absorbing effect of the shock absorber is good; when the control device adjusts the oil return amount of the oil return hole to be in a better position, the fatigue degree of the compression damping spring is slowed down, and the service life is long.

In foretell novel bumper shock absorber, the check valve including being cylindric disk seat and check valve piece, the outer end terminal surface of disk seat on have and be provided with the axial projection with the axial, the axial projection link firmly the piston holder through the nut axial, the piston holder on have the valve opening that the axial set up, the check valve piece cover locate on the axial projection and be in between disk seat and the piston holder, check valve piece elasticity support lean on in the piston holder and seal the valve opening of acting on the piston holder. The piston retainer mainly comprises an inner ring sleeve and an outer ring sleeve, the valve hole is positioned between the inner ring sleeve and the outer ring sleeve, the axial convex column is provided with an assembly step, the inner end face of the inner ring sleeve is provided with an assembly groove, the assembly groove of the inner ring sleeve and the assembly step of the axial convex column are correspondingly assembled to prevent the inner ring sleeve from radially moving on the axial convex column, and the assembly structure is stable.

In the above-mentioned novel shock absorber, the diameter of disk seat be less than the diameter of piston holder, when the check valve was in interior damping pipe, and the disk seat of this check valve and the cooperation of interior damping pipe radial interval, the piston holder of check valve pastes to paste with the inner wall of interior damping pipe and cooperates. The concrete structure that the piston retainer is attached to the inner wall of interior damping pipe and is leaned on the complex is: the outer wall of the outer ring sleeve is relatively attached and matched with the inner wall of the inner damping tube.

In foretell novel bumper shock absorber, the inner terminal surface of disk seat on have a spread groove that sets up with the axial, the one end tip of locating lever have a spliced pole that sets up with the axial, size, the shape adaptation of spliced pole and spread groove, the outer wall of spliced pole on be provided with the external screw thread, the inner wall of spread groove on be provided with the internal thread, the external screw thread of spliced pole and the internal thread screwed connection of disk seat make the one end axial of disk seat and locating lever link firmly, the outer wall of piston holder on the fixed ring seal of establishing of inlaying, when the piston holder of check valve and interior damping tube sliding fit, and the sealed inner wall that acts on interior damping tube of this ring seal. The annular sealing ring is positioned on the outer wall of the outer ring sleeve, and the annular sealing ring elastically extrudes and seals the inner wall of the inner damping tube, so that the effectiveness of sealing the piston retainer and the inner damping tube is ensured.

In foretell novel bumper shock absorber, the oil gallery including radially set up oil gallery one on the disk seat and set up oil gallery two on the axial projection with the axial, the diameter of oil gallery one be greater than the diameter of oil gallery two and this oil gallery one and oil gallery two communicate in the disk seat. The central line of the first oil return hole is vertical to the central line of the second oil return hole relatively, so that the oil return flow can be controlled through the communication position of the first oil return hole and the second oil return hole in the valve seat, the oil return flow can be controlled for the first oil return hole, the oil return flow can be controlled for the second oil return hole, and the structure can be conveniently controlled.

In foretell novel bumper shock absorber, controlling means include the damping lever, the locating lever be hollow structure, the damping lever wear to locate in the locating lever and this damping lever and locating lever axial sliding seal cooperation, when the damping lever is at the locating lever axial sliding displacement, and the one end of this damping lever stretches out the one end of locating lever, the one end of damping lever stretch out the end have or with the reducing through-flow of oil gallery one or with the structure of supporting of oil gallery one, two simultaneous shutoff of oil gallery, the other end of damping lever stretch out the other end of locating lever, the damping lever other end stretch out and be provided with between end and the shock tube and make the damping lever in the axial electrodeless adjusting device who feeds of locating lever. The outer wall of the damping rod is embedded with a rubber ring, the damping rod and the positioning rod are in sealing fit and can slide relative to each other under the action of elastic abutting of the rubber ring and the inner wall of the positioning rod, the structure is stable, and the service life is long.

In the novel shock absorber, the abutting structure comprises a conical part at the extending end of one end of the damping rod, when the damping rod axially displaces to abut against the orifice of the oil return hole II, the extending end of one end of the damping rod corresponds to the oil return hole I, the conical part corresponds to the oil return hole II, and the oil return hole I and the oil return hole II are simultaneously sealed; when the damping rod axially displaces to enable the conical part to be adjacent to the orifice of the oil return hole II, and the extending end of one end of the damping rod corresponds to the oil return hole I, the oil return hole I is sealed; when the damping rod axially displaces to enable the conical part to be adjacent to the orifice of the first oil return hole, and the extending end part of one end of the damping rod corresponds to the first oil return hole, so that the first oil return hole is reduced in diameter and flows through. The conical part is mainly arranged to be capable of axially abutting against and adjusting the oil return hole, the outer wall of the rod body of the damping rod can axially and vertically abut against the orifice of the first oil return hole, and the rod body of the damping rod can be plugged and adjusted with the orifice of the first oil return hole.

In foretell novel bumper shock absorber, the other end of damper cylinder set firmly the shutoff aluminum cap, the shutoff aluminum cap on have a bar pilot hole that runs through the setting of shutoff aluminum cap with the axial, the inner wall of the one end of bar pilot hole on be provided with the internal thread, the outer wall of the other end of locating lever on be provided with the external screw thread, the locating lever pass through the external screw thread spiral and fix on the internal thread of shutoff aluminum cap and distribute in the damper cylinder with the axial, locating lever and shutoff aluminum cap between on still the spiral be provided with prevent that the locating lever spiral is not hard up stop nut on the shutoff aluminum cap. The purpose that setting up of shutoff aluminum cap and locating lever through threaded connection is: the assembly of the positioning rod and the plugging aluminum cap is convenient, and the disassembly and the assembly are convenient

In foretell novel bumper shock absorber, electrodeless adjusting device including adjusting the cap, the outer end tip of shutoff aluminium cap axial regulation portion has, the outer wall of axial regulation portion on be provided with the external screw thread, the inner wall of regulation cap on have the internal thread, the internal thread of regulation cap and the external screw thread screw fit axial of axial regulation portion adjust, regulation cap and axial regulation portion between be provided with and make and adjust the linkage that cap, axial regulation portion axial feed adjusted the sign, the bar pilot hole other end in be provided with the one end that the seat was adjusted to the shaft coupling and this shaft coupling and the end that stretches out of damping rod other end links firmly, the other end that the seat was adjusted to the shaft coupling link firmly with the regulation cap through the bolt. The axial adjusting part and the adjusting cap are in threaded connection, so that the axial adjusting part and the adjusting cap can be adjusted steplessly, and the axial displacement of the damping rod in the positioning rod can be adjusted accurately.

In foretell novel bumper shock absorber, aggregate unit include the steel ball, the outer wall of axial adjustment portion on have the assembly blind hole of radial setting, the steel ball be located the assembly blind hole, the assembly blind hole in still be provided with the compression spring that elasticity acted on the steel ball, when adjusting cap and axial adjustment portion through the mode axial displacement regulation of spiral, and this steel ball supports and leans on the internal thread of adjusting the cap and the sign of beating on the internal thread. Lean on through the steel ball and lean on the internal thread in adjusting the cap and beat the schematic structural design comparatively stable, beat the sound and indicate comparatively obviously convenient to use.

Compared with the prior art, the novel shock absorber has the advantages that: the damping device has the advantages that the structural design is reasonable and simple, the structural design of the control device is stable, the oil return amount of the oil return hole can be effectively controlled, the electrodeless adjusting device is convenient to use, the adjusting position is accurate, the damping cylinder and the damping rod can be reset and absorb energy, and the whole damping effect of the shock absorber is good.

Drawings

Fig. 1 is a schematic sectional structure view of the novel shock absorber.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of a portion B in fig. 1.

In the figure, 1, a damper cylinder; 2. a shock-absorbing lever; 3. positioning a rod; 4. a main oil chamber; 5. compressing the damping spring; 6. an inner damping tube; 7. an outer oil chamber; 8. oil sealing; 9. an inner oil chamber; 10. a guide sleeve; 11. a middle oil cavity; 12. a return buffer spring; 13. a side hole; 14. an oil through hole; 15. a valve seat; 16. a one-way valve plate; 17. an axial boss; 18. a nut; 19. a piston holder; 20. a valve bore; 21. connecting columns; 22. an annular seal ring; 23. an oil return hole I; 24. an oil return hole II; 25. a damping lever; 26. a tapered portion; 27. plugging the aluminum cap; 28. a limit nut; 29. an adjusting cap; 30. an axial adjustment portion; 31. a coupling adjusting seat; 32. steel balls; 33. compressing the spring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, fig. 2 and fig. 3, this novel bumper shock absorber mainly comprises damper cylinder 1 and shock attenuation pole 2, and the coaxial orientation has set firmly locating lever 3 in the damper cylinder 1, and locating lever 3 and damper cylinder 1 radial interval cooperation form main oil pocket 4, are provided with compression damping spring 5 in the main oil pocket 4, and locating lever 3, compression damping spring 5's effect are located to this compression damping spring 5 cover: the elasticity acts on the damping cylinder 1 and the damping rod 2 to enable the damping cylinder 1 and the damping rod 2 to compress and damp relatively.

During actual manufacturing, the shock absorption rod 2 is of a hollow structure, an inner damping tube 6 is coaxially and fixedly arranged in the shock absorption rod 2, the shock absorption rod 2 and the inner damping tube 6 are radially matched at intervals to form an outer oil cavity 7, one end of the shock absorption tube 1 is sleeved at one end of the shock absorption rod 2, one end of the shock absorption tube 1 is fixedly provided with an oil seal 8 which is in sliding sealing fit with the shock absorption rod 2 in the axial direction, and the oil seal 8 ensures the sealing effectiveness of the shock absorption tube 1 and the shock absorption rod 2 in the axial direction; when the shock absorption cylinder 1 and the shock absorption rod 2 are oppositely connected, one end of the positioning rod 3 penetrates through one end of the inner damping tube 6, one end of the positioning rod 3 is fixedly provided with a one-way valve which is in axial sliding sealing fit with the inner damping tube 6, the one-way valve enables the inner damping tube 6 to form an inner oil cavity 9, one end of the inner damping tube 6 is fixedly provided with a guide sleeve 10 which is in axial sliding sealing fit with the positioning rod 3, and the guide sleeve 10 and the one-way valve shaft are in axial interval fit to form an intermediate oil cavity 11; the oil in the inner oil chamber 9 flows into the middle oil chamber 11 and flows through the check valve, and the oil in the inner oil chamber 9 and the oil in the middle oil chamber 11 are closed by the check valve.

During actual manufacturing, the specific structure of the check valve is as follows: the valve mainly comprises a cylindrical valve seat 15 and a one-way valve plate 16, wherein an axial convex column 17 is coaxially arranged on the end face of the outer end of the valve seat 15, the axial convex column 17 is axially and fixedly connected with a piston retainer 19 through a nut 18, the piston retainer 19 is provided with an axially arranged valve hole 20, the one-way valve plate 16 is sleeved on the axial convex column 17 and is positioned between the valve seat 15 and the piston retainer 19, and the one-way valve plate 16 is elastically abutted against the piston retainer 19 and acts on the valve hole 20 of the piston retainer 19 in a sealing manner; the diameter of the valve seat 15 is smaller than that of the piston retainer 19, when the check valve is positioned in the inner damping tube 6, the valve seat 15 of the check valve is matched with the inner damping tube 6 at intervals in the radial direction, and the piston retainer 19 of the check valve is matched with the inner wall of the inner damping tube 6 in an abutting mode. In actual design, an annular sealing ring 22 is fixedly embedded on the outer wall of the piston holder 19, and when the piston holder 19 of the check valve is in sliding fit with the inner damping tube 6, the annular sealing ring 22 acts on the inner wall of the inner damping tube 6 in a sealing manner.

The specific connection mode of the positioning rod 3 and the one-way valve is as follows: the connecting groove that has the coaxial arrangement on the inner terminal surface of disk seat 15, the one end tip of locating lever 3 has the spliced pole 21 with the axial arrangement, the size of spliced pole 21 and connecting groove, shape adaptation, be provided with the external screw thread on the outer wall of spliced pole 21, be provided with the internal thread on the inner wall of connecting groove, the external screw thread of spliced pole 21 and the internal thread screwed connection of disk seat 15 make disk seat 15 and locating lever 3's one end axial link firmly.

A reset buffer spring 12 is arranged in the middle oil cavity 11, and the reset buffer spring 12 has the following functions: the elasticity acts on the damping cylinder 1 and the damping rod 2 to enable the damping cylinder 1 and the damping rod 2 to extend and retract and reset oppositely.

The main oil cavity 4 is communicated with the outer oil cavity 7 through a side hole 13 axially arranged on the guide sleeve 10, the outer oil cavity 7 is communicated with the inner oil cavity 9 through an oil through hole 14 radially arranged on the pipe wall of the inner damping pipe 6, the inner oil cavity 9 is communicated with the middle oil cavity 11 through a one-way valve, the one-way valve is also provided with an oil return hole for communicating the middle oil cavity 11 with the inner oil cavity 9, and when the shock absorption cylinder 1 and the shock absorption rod 2 are axially and relatively compressed, oil in the main oil cavity 4 flows to the middle oil cavity 11 through the outer oil cavity 7 and the inner oil cavity 9 through the one-way valve; when the shock absorbing cylinder 1 and the shock absorbing rod 2 are reset relatively in the axial direction, oil in the middle oil cavity 11 flows to the main oil cavity 4 through the oil return holes and flows to the inner oil cavity 9 and the outer oil cavity 7.

During actual manufacturing, the specific structure of the oil return hole is as follows: the valve mainly comprises a first oil return hole 23 radially arranged on the valve seat 15 and a second oil return hole 24 coaxially arranged on the axial convex column 17, wherein the diameter of the first oil return hole 23 is larger than that of the second oil return hole 24, and the first oil return hole 23 and the second oil return hole 24 are communicated in the valve seat 15.

The shock-absorbing cylinder 1 is provided with a control device which can control the oil return amount of the oil return hole to enable the shock-absorbing cylinder 1 and the shock-absorbing rod 2 to reset damping energy absorption; in actual manufacturing, the specific implementation mode of the control device is as follows: mainly constitute by damping lever 25, locating lever 3 is hollow structure, damping lever 25 wears to locate in locating lever 3 and this damping lever 25 and the sealed cooperation of 3 axial sliding of locating lever, when damping lever 25 is at 3 internal axial sliding displacement of locating lever, and the one end of this damping lever 25 stretches out the one end of locating lever 3, the one end of damping lever 25 stretches out the end and has or with the reducing through-flow of an oil gallery 23 or with the shutoff of an oil gallery 23, the structure of supporting of shutoff simultaneously of two 24 of oil galleries.

In practical design, the specific implementation of the abutting structure is as follows: the extending end of one end of the damping rod 25 is provided with a conical part 26, when the damping rod 25 axially displaces to enable the conical part 26 to abut against the orifice of the second oil return hole 24, and the extending end of one end of the damping rod 25 corresponds to the first oil return hole 23 and the conical part 26 corresponds to the second oil return hole 24, so that the first oil return hole 23 and the second oil return hole 24 are simultaneously sealed; when the damping rod 25 axially displaces to enable the conical part 26 to be adjacent to the orifice of the second oil return hole 24, and the extending end of one end of the damping rod 25 corresponds to the first oil return hole 23, the first oil return hole 23 is blocked; when the damping rod 25 is axially displaced to enable the conical part 26 to be adjacent to the opening of the first oil return hole 23, and the extending end part of one end of the damping rod 25 corresponds to the first oil return hole 23, the first oil return hole 23 is reduced in diameter and can flow through.

The other end of damper cylinder 1 has set firmly shutoff aluminum cap 27, the bar pilot hole that sets up with axial through shutoff aluminum cap 27 has on the shutoff aluminum cap 27, be provided with the internal thread on the inner wall of the one end of bar pilot hole, be provided with the external screw thread on the outer wall of the other end of locating lever 3, locating lever 3 passes through external screw thread spiral fixation on the internal thread of shutoff aluminum cap 27 and with axial distribution in damper cylinder 1, it prevents the not hard up stop nut 28 of spiral of locating lever 3 on shutoff aluminum cap 27 still to spiral set up on the locating lever 3 between locating lever 3 and the shutoff aluminum cap 27.

The other end of the damping rod 25 extends out of the other end of the positioning rod 3, and a stepless adjusting device which enables the damping rod 25 to axially feed in the positioning rod 3 is arranged between the extending end of the other end of the damping rod 25 and the shock absorption cylinder 1. In the actual design, the specific implementation of the stepless adjusting device is as follows: mainly by adjusting cap 29, the outer end tip of shutoff aluminum cap 27 has axial regulation portion 30, be provided with the external screw thread on the outer wall of axial regulation portion 30, the internal thread has on the inner wall of adjusting cap 29, the internal thread of adjusting cap 29 and the external screw thread screw fit axial of axial regulation portion 30 are adjusted, be provided with between adjusting cap 29 and the axial regulation portion 30 and make adjusting cap 29, the aggregate unit that axial regulation portion 30 axial feed adjusted the sign, be provided with the coupling in the bar pilot hole other end and adjust seat 31 and this coupling and adjust the one end of seat 31 and the other end of damping rod 25 and stretch out the end and link firmly, the other end of coupling adjustment seat 31 links firmly with adjusting cap 29 through the bolt.

In the actual design, the specific implementation mode of the linkage device is as follows: the axial adjusting part 30 is provided with a radial assembly blind hole on the outer wall, the steel ball 32 is positioned in the assembly blind hole, a compression spring 33 which elastically acts on the steel ball 32 is also arranged in the assembly blind hole, and when the adjusting cap 29 and the axial adjusting part 30 are adjusted in axial displacement in a spiral mode, the steel ball 32 is abutted against the internal thread of the adjusting cap 29 and is indicated by jumping on the internal thread.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although shock tube 1 is used more herein; a shock-absorbing rod 2; a positioning rod 3; a main oil chamber 4; compressing the damping spring 5; an inner damping tube 6; an outer oil chamber 7; an oil seal 8; an internal oil chamber 9; a guide sleeve 10; a middle oil chamber 11; a return buffer spring 12; a side hole 13; an oil through hole 14; a valve seat 15; a one-way valve plate 16; an axial boss 17; a nut 18; a piston holder 19; a valve hole 20; a connecting column 21; an annular seal ring 22; a first oil return hole 23; a second oil return hole 24; a damper rod 25; a tapered portion 26; a plugging aluminum cap 27; a limit nut 28; an adjustment cap 29; an axial direction adjustment portion 30; a coupling adjustment seat 31; steel balls 32; compression spring 33, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A novel shock absorber comprises a shock absorbing cylinder (1) and a shock absorbing rod (2), wherein a positioning rod (3) is fixedly arranged in the shock absorbing cylinder (1) in the same axial direction, the positioning rod (3) and the shock absorbing cylinder (1) are matched with each other at radial intervals to form a main oil cavity (4), a compression damping spring (5) is arranged in the main oil cavity (4), the novel shock absorber is characterized in that the shock absorbing rod (2) is of a hollow structure, an inner damping tube (6) is fixedly arranged in the shock absorbing rod (2) in the same axial direction, the shock absorbing rod (2) and the inner damping tube (6) are matched with each other at radial intervals to form an outer oil cavity (7), one end of the shock absorbing cylinder (1) is sleeved at one end of the shock absorbing rod (2), an oil seal (8) matched with the shock absorbing rod (2) in an axial sliding sealing manner is fixedly arranged at one end of the shock absorbing cylinder (1) and the shock absorbing rod (2) are connected with each other, one end of the positioning rod (3) is penetrated at one, one end of the positioning rod (3) is fixedly provided with a one-way valve which is in axial sliding sealing fit with the inner damping tube (6), the one-way valve enables the inner damping tube (6) to form an inner oil cavity (9), one end of the inner damping tube (6) is fixedly provided with a guide sleeve (10) which is in axial sliding sealing fit with the positioning rod (3), the guide sleeve (10) and the one-way valve are axially matched at intervals to form a middle oil cavity (11), the middle oil cavity (11) is internally provided with a reset buffer spring (12), the main oil cavity (4) and the outer oil cavity (7) are communicated through a side hole (13) which is axially arranged on the guide sleeve (10), the outer oil cavity (7) and the inner oil cavity (9) are communicated through an oil through hole (14) which is radially arranged on the tube wall of the inner damping tube (6), the inner oil cavity (9) and the middle oil cavity (11) are communicated through the one-way valve, and the one-way valve is also provided with an oil return hole which enables the middle oil cavity (, when the damping cylinder (1) and the damping rod (2) are compressed axially and relatively, oil in the main oil cavity (4) flows to the middle oil cavity (11) through the outer oil cavity (7) and the inner oil cavity (9) through the one-way valve; when the shock absorbing cylinder (1) and the shock absorbing rod (2) are reset relatively in the axial direction, oil in the middle oil cavity (11) flows through the inner oil cavity (9) and the outer oil cavity (7) through the oil return hole and flows to the main oil cavity (4), and the shock absorbing cylinder (1) is provided with a control device capable of controlling the oil return amount of the oil return hole to enable the shock absorbing cylinder (1) and the shock absorbing rod (2) to reset and absorb damping energy.

2. The novel shock absorber according to claim 1, wherein the check valve comprises a cylindrical valve seat (15) and a check valve plate (16), an axial convex column (17) is coaxially arranged on the end face of the outer end of the valve seat (15), the axial convex column (17) is axially fixedly connected with a piston retainer (19) through a nut (18), the piston retainer (19) is provided with a valve hole (20) axially arranged, the check valve plate (16) is sleeved on the axial convex column (17) and is located between the valve seat (15) and the piston retainer (19), and the check valve plate (16) is elastically abutted against the piston retainer (19) and is sealed to act on the valve hole (20) of the piston retainer (19).

3. The novel shock absorber according to claim 2, wherein the diameter of the valve seat (15) is smaller than that of the piston holder (19), when the check valve is positioned in the inner damping tube (6), the valve seat (15) of the check valve is in radial spaced fit with the inner damping tube (6), and the piston holder (19) of the check valve is in abutting fit with the inner wall of the inner damping tube (6).

4. A new shock absorber according to claim 3, wherein the inner end face of the valve seat (15) has coaxially arranged coupling grooves, one end part of the positioning rod (3) is provided with a connecting column (21) which is coaxially arranged, the connecting column (21) is matched with the connecting groove in size and shape, the outer wall of the connecting column (21) is provided with an external thread, the inner wall of the connecting groove is provided with internal threads, the external threads of the connecting column (21) are spirally connected with the internal threads of the valve seat (15) to ensure that the valve seat (15) is axially and fixedly connected with one end of the positioning rod (3), an annular sealing ring (22) is fixedly embedded on the outer wall of the piston retainer (19), when the piston retainer (19) of the one-way valve is in sliding fit with the inner damping tube (6), and the annular sealing ring (22) acts on the inner wall of the inner damping tube (6) in a sealing way.

5. The novel shock absorber according to claim 4, wherein the oil return holes comprise a first oil return hole (23) radially arranged on the valve seat (15) and a second oil return hole (24) coaxially arranged on the axial boss (17), the diameter of the first oil return hole (23) is larger than that of the second oil return hole (24), and the first oil return hole (23) and the second oil return hole (24) are communicated in the valve seat (15).

6. The novel shock absorber according to claim 5, wherein the control device comprises a damping rod (25), the positioning rod (3) is of a hollow structure, the damping rod (25) is arranged in the positioning rod (3) in a penetrating mode, the damping rod (25) is matched with the positioning rod (3) in an axial sliding and sealing mode, when the damping rod (25) axially slides and displaces in the positioning rod (3), one end of the damping rod (25) extends out of one end of the positioning rod (3), one end of the damping rod (25) extends out of an abutting structure which is provided with or blocks a reducing through flow of a first oil return hole (23) or blocks a first oil return hole (23) and a second oil return hole (24) simultaneously, the other end of the damping rod (25) extends out of the other end of the positioning rod (3), and a stepless adjusting structure which enables the damping rod (25) to axially feed in the positioning rod (3) is arranged between the extending end of the other end of the damping rod (25) and the damping cylinder (1) Provided is a device.

7. The novel shock absorber according to claim 6, wherein the abutting structure comprises that an extended end of one end of the damping rod (25) is provided with a conical part (26), when the damping rod (25) is axially displaced to enable the conical part (26) to abut against the orifice of the oil return hole II (24), and the extended end of one end of the damping rod (25) corresponds to the oil return hole I (23) and the conical part (26) corresponds to the oil return hole II (24), the oil return hole I (23) and the oil return hole II (24) are simultaneously sealed; when the damping rod (25) axially displaces to enable the conical part (26) to be adjacent to the orifice of the oil return hole II (24), and the extending end of one end of the damping rod (25) corresponds to the oil return hole I (23), the oil return hole I (23) is blocked; when the damping rod (25) is axially displaced to enable the conical part (26) to be adjacent to the orifice of the first oil return hole (23), and the extending end part of one end of the damping rod (25) corresponds to the first oil return hole (23), the first oil return hole (23) is reduced in diameter and flows through.

8. The novel shock absorber as claimed in claim 6, wherein the other end of the shock absorbing cylinder (1) is fixedly provided with a blocking aluminum cap (27), the blocking aluminum cap (27) is provided with a bar-shaped assembly hole which coaxially penetrates through the blocking aluminum cap (27), an inner wall of one end of the bar-shaped assembly hole is provided with an internal thread, an external thread is arranged on an outer wall of the other end of the positioning rod (3), the positioning rod (3) is spirally fixed on the internal thread of the blocking aluminum cap (27) through the external thread and coaxially distributed in the shock absorbing cylinder (1), and a limit nut (28) for preventing the positioning rod (3) from being spirally loosened on the blocking aluminum cap (27) is further spirally arranged on the positioning rod (3) between the positioning rod (3) and the blocking aluminum cap (27).

9. A new shock absorber according to claim 8, characterized in that the stepless adjusting device comprises an adjusting cap (29), the end part of the outer end of the plugging aluminum cap (27) is provided with an axial adjusting part (30), the outer wall of the axial adjusting part (30) is provided with an external thread, the inner wall of the adjusting cap (29) is provided with internal threads, the internal threads of the adjusting cap (29) and the external threads of the axial adjusting part (30) are in screw fit and axial adjustment, a linkage device which can lead the axial feed adjustment of the adjusting cap (29) and the axial adjusting part (30) to be indicated is arranged between the adjusting cap (29) and the axial adjusting part (30), a coupling adjusting seat (31) is arranged at the other end of the strip-shaped assembling hole, one end of the coupling adjusting seat (31) is fixedly connected with the extending end of the other end of the damping rod (25), the other end of the coupling adjusting seat (31) is fixedly connected with an adjusting cap (29) through a bolt.

10. The novel shock absorber as claimed in claim 9, wherein the linkage comprises a steel ball (32), the outer wall of the axial adjusting portion (30) is provided with a radially arranged blind assembly hole, the steel ball (32) is located in the blind assembly hole, a compression spring (33) which elastically acts on the steel ball (32) is further arranged in the blind assembly hole, and when the adjusting cap (29) and the axial adjusting portion (30) are axially displaced and adjusted in a spiral mode, the steel ball (32) abuts against the internal thread of the adjusting cap (29) and is indicated by jumping on the internal thread.