阅读说明：本技术 一种多段减震的空气弹簧紧固件 (Multi-section damping air spring fastener ) 是由 王刘恩 卢承鑫 于 2021-07-01 设计创作，主要内容包括：本发明涉及紧固件技术领域,具体为一种多段减震的空气弹簧紧固件,包括螺杆、垫片、螺帽、槽口、螺套、盖板、第一弹簧、挡块、第二凹槽及第二弹簧,垫片固定安装于螺杆的上端,螺帽固定安装于垫片的上端,槽口开设于螺帽的上端,螺套螺纹套接于螺杆的外圆面下端,盖板活动安装于槽口的内部上端,第一弹簧固定安装于槽口的内部下端与盖板的下端外表面之间中间位置,该多段减震的空气弹簧紧固件能够在安装后对槽口进行闭合,防止槽口堵塞影响后期拆卸检修,同时便于与拧动内六角扳手连接,方便在狭小的空间安装,便于添加润滑油有效降低螺杆锈死现象,另外螺杆与螺套螺纹连接后再次卡合,提高了紧固件对空气弹簧固定的稳定性。(The invention relates to the technical field of fasteners, in particular to a multi-section damping air spring fastener, which comprises a screw, a gasket, a screw cap, a notch, a screw sleeve, a cover plate, a first spring, a stop block, a second groove and a second spring, wherein the gasket is fixedly arranged at the upper end of the screw, the screw cap is fixedly arranged at the upper end of the gasket, the notch is arranged at the upper end of the screw, the screw sleeve is sleeved at the lower end of the outer circular surface of the screw in a threaded manner, the cover plate is movably arranged at the upper end of the inner part of the notch, the first spring is fixedly arranged at the middle position between the lower end of the inner part of the notch and the outer surface of the lower end of the cover plate, the notch can be closed after the multi-section damping air spring fastener is installed, the notch is prevented from being blocked to influence on later-stage disassembly and maintenance, meanwhile, the multi-section damping air spring fastener is convenient to be connected with a screwing inner hexagonal wrench, the multi-section damping air spring fastener is convenient to be installed in a narrow space, lubricating oil is convenient to effectively reduce the rust phenomenon of the screw, in addition, the screw is clamped again after the screw is connected with the screw sleeve in a threaded manner, the stability of fastener to air spring fixed has been improved.)

1. The air spring fastener with the multiple shock absorption sections is characterized by comprising a screw rod (1), a gasket (2), a screw cap (3), a notch (4), a threaded sleeve (5), a cover plate (6), a first spring (7), a stop block (8), a second groove (13) and a second spring (14), wherein the gasket (2) is fixedly arranged at the upper end of the screw rod (1), the screw cap (3) is fixedly arranged at the upper end of the gasket (2), the notch (4) is arranged at the upper end of the screw cap (3), the threaded sleeve (5) is sleeved at the lower end of the outer circular surface of the screw rod (1), the cover plate (6) is movably arranged at the upper end of the inside of the notch (4), the first spring (7) is fixedly arranged at the middle position between the lower end of the inside of the notch (4) and the outer surface of the lower end of the cover plate (6), the second groove (13) is arranged at the inner surface of the notch (4), the stop block (8) is movably arranged in the second groove (13), the second spring (14) is fixedly arranged in the second groove (13) and located between the stop block (8) and the second groove (13), the outer surface of the upper end of the stop block (8) is an arc surface, and a notch is formed in the position, corresponding to the stop block (8), of the edge of the outer surface of the upper end of the cover plate (6).

2. The multi-segment damping air spring fastener according to claim 1, wherein a first groove (9) is formed in an outer ring of the screw rod (1) at an edge of an outer surface of a lower end of the gasket (2), an air bag (10) is fixedly installed inside the first groove (9), an air tap (11) is fixedly installed on an outer surface of an upper end of the air bag (10), the upper end of the air tap (11) penetrates through the gasket (2) and is communicated with the notch (4), a plurality of holes (24) are formed in an inner circular surface of the air bag (10) at equal intervals, the air tap (11) is in a shape of a truncated cone with a wide upper end and a narrow lower end, the lower end of the air tap (11) penetrates through and extends to the inside of the air bag (10), and the air tap (11) and the air bag (10) are made of the same material.

3. The multi-segmented cushioning air spring fastener according to claim 2, wherein said cavity (24) is formed in an inflated condition of said air bladder (10), and wherein an interior of said air bladder (10) is filled with a lubricating oil.

4. The multi-section damping air spring fastener according to claim 1, wherein an air vent (15) is formed in the edge of the outer surface of the upper end of the cover plate (6), a plurality of shielding pieces (16) are fixedly mounted on the inner surface of the air vent (15), the length of each shielding piece (16) is larger than the radius of the corresponding air vent (15), the shielding pieces (16) are combined into a downward-pointing cone shape, each shielding piece (16) is made of rubber, and adjacent shielding pieces (16) are not fixed.

5. The multi-section damping air spring fastener according to claim 1, wherein the front end and the rear end of the inner surface of the threaded sleeve (5) are respectively provided with a clamping groove (23), the lower ends of the outer surfaces of the front end and the rear end of the screw rod (1) are respectively provided with a through hole (17), the inner lower end of each through hole (17) is provided with a third groove (18), the center of the outer surface of the lower end of the cover plate (6) is fixedly provided with a push rod (12), the lower end of the push rod (12) penetrates through and extends into the first spring (7), the screw rod (1) and the through holes (17), the push rod (12) and the screw rod (1) can slide up and down, the front end and the rear end of the inner part of each through hole (17) are respectively and movably provided with a clamping block (19), a traction rod (20) is movably arranged opposite to each of the two clamping blocks (19), and a hinge (21) is movably arranged between the traction rod (20) and the clamping blocks (19), a spring shaft (22) is movably arranged between the two traction rods (20), and the clamping block (19) penetrates through the clamping groove (23).

6. A multi-stage damping air spring fastener according to claim 5, wherein the two pull rods (20) are bent downward into a V-shape by the spring shaft (22) and the hinge (21), and the pull rods (20) penetrate the inside of the third grooves (18).

Technical Field

The invention relates to the technical field of fasteners, in particular to a multi-section damping air spring fastener.

Background

The telescopic closed container is filled with compressed air, and a spring utilizing the elastic action of the air is called an air spring;

the fastener is a mechanical part which is used for fastening connection and has extremely wide application; the fastening piece of the air spring refers to a bolt part in particular, the air spring is usually connected with a device through a flange plate and fastened through a bolt, and the length of a screw rod is designed to be just enough to be sleeved with a threaded sleeve after the screw rod is fastened in order to prevent the phenomenon that the air spring is scratched when the screw rod is too long in the using process because the air spring is made of rubber products.

When air spring was applied to the vehicle foundation and uses, because the car can produce a large amount of tail gas when driving, contain a large amount of particulate matters in these tail gases, these particulate matters extremely easily adhere to the fastener surface after mixing with the petrol of not burning completely, lead to the notch of fastener to block up, influence air spring's dismantlement and overhaul, the fastener can be oxidized and rusted after long-term contact air simultaneously, lead to the screw rod to rust to die to be difficult to dismantle, and do not have the production at the car in-process and rock, it is loose because of rocking to lead to the fastener after the installation easily, need periodic overhaul for guaranteeing safety, air spring installation space is narrow and small in addition, the inconvenient screw rod of taking disect insertion is in the mounting hole of air spring.

To this end, a multi-segmented shock absorbing air spring fastener is proposed.

Disclosure of Invention

The invention aims to provide a multi-section damping air spring fastener, which can close a notch after being installed, prevent the notch from being blocked and influencing later-stage disassembly and maintenance, is convenient to be connected with a screwing inner hexagonal wrench, is convenient to install in a narrow space, is convenient to add lubricating oil and effectively reduces the phenomenon of screw rod rusting, and is clamped again after being in threaded connection with a threaded sleeve, so that the stability of the fastener for fixing an air spring is improved, and the problem in the background art is solved.

In order to achieve the purpose, the invention provides the following technical scheme: a multi-section damping air spring fastener comprises a screw rod, a gasket, a screw cap, a notch, a thread sleeve, a cover plate, a first spring, a stop block, a second groove and a second spring, the gasket is fixedly arranged at the upper end of the screw rod, the nut is fixedly arranged at the upper end of the gasket, the notch is arranged at the upper end of the nut, the threaded sleeve is sleeved at the lower end of the outer circular surface of the screw rod in a threaded manner, the cover plate is movably arranged at the upper end of the inner part of the notch, the first spring is fixedly arranged in the middle between the lower end of the inner part of the notch and the outer surface of the lower end of the cover plate, the second groove is arranged on the inner surface of the notch, the stop block is movably arranged in the second groove, the second spring is fixedly installed in the second groove and located between the stop block and the second groove, the outer surface of the upper end of the stop block is an arc surface, and a notch is formed in the edge of the outer surface of the upper end of the cover plate, corresponding to the position of the stop block.

When the air spring is applied to an automobile base, a large amount of tail gas can be generated when an automobile runs, the tail gas contains a large amount of particles, the particles are mixed with incompletely combusted gasoline and then are extremely easy to attach to the surface of a fastener, so that a notch of the fastener is blocked, the disassembly and maintenance of the air spring are influenced, in addition, the air spring is narrow in installation space, and a screw rod which is inconvenient to take is directly inserted into an installation hole of the air spring;

when the air spring fixing device works, firstly, the inner hexagonal wrench for screwing the fastener is inserted into the notch on the nut, at the moment, the cover plate is extruded and contracted to the inside of the notch by the inner hexagonal wrench, the first spring is compressed and deformed, and simultaneously, the inner hexagonal wrench is extruded to the stop block by utilizing the arc surface of the inner hexagonal wrench after being contacted with the stop block, so that the stop block is contracted to the inside of the second groove, the stop block compresses the second spring, the second spring provides opposite acting force for the stop block, the stop block clamps the inner hexagonal wrench from all directions of the notch, thereby fixing the screw rod and the inner hexagonal wrench together, as the weight of the fastener is lighter, the stop block generates friction with the inner hexagonal wrench under the action of the elastic force of the second spring, so as to prevent the fastener from falling off between the self gravity and the inner hexagonal wrench, at the moment, the inner hexagonal wrench can be held to stretch the screw rod into a narrow space to install the air spring, penetrate the mounting hole of ring flange on the air spring with the screw rod during installation, then utilize interior hexagonal spanner to twist the screw rod and realize threaded connection fixed, and cup joint the end of screw rod with the swivel nut screw thread after screwing up, further strengthen fixedly between screw rod and the ring flange, extract interior hexagonal spanner from the notch after the installation, the apron is not receiving the extrusion of interior hexagonal spanner this moment, under the effect that first spring resets, the apron shifts up inside the notch, thereby it is closed to the notch, prevent that debris from getting into the inside problem that causes the later stage to overhaul to be difficult to the dismantlement of notch blocking up the notch of notch, interior hexagonal spanner extracts the back simultaneously, the dog also stretches out the second recess under the effect that the second spring resets, thereby utilize the dog to carry on spacingly from the upper end of notch to the apron, prevent that the apron from breaking away from the notch.

Preferably, the lower extreme surface edge of gasket is located the outer lane of screw rod and has seted up first recess, the inside fixed mounting of first recess has the gasbag, the upper end surface fixed mounting of gasbag has the air cock, and the upper end of air cock runs through the gasket and is linked together with the notch, the hole has been seted up to the interior disc equidistance of gasbag a plurality of, the air cock is narrow round platform form under the width, and the lower extreme of air cock runs through and extends to the inside of gasbag, the air cock is the same with the gasbag material.

The fastener can be oxidized and rusted after contacting air for a long time, so that the screw is rusted and difficult to disassemble;

when the air spring air bag sealing device works, firstly, the air spring is installed and fixed through the fastening piece, the inner hexagonal wrench is utilized to move up and down in the groove opening after the installation is finished, the cover plate is repeatedly extruded, the cover plate is in piston motion, so that air is injected into the air bag through the air nozzle, the air bag is expanded, the air nozzle is in a round table shape with a wide upper part and a narrow lower part, the lower end of the air nozzle penetrates through and extends into the air bag, the air is easily extruded into the air bag, the air nozzle penetrating into the air bag is extruded after the air bag is expanded, the sealing is realized, the air leakage speed inside the air bag is reduced, then, the internal lubricating oil is discharged through the hole by the expanded air bag under the action of air pressure, the lubricating oil flows along the surface of the screw rod, the lubricating maintenance on the surface of the screw rod is realized, the rusting risk of the screw rod is reduced until the air in the air bag is discharged completely, and the discharging of the lubricating oil is stopped, and because the hole is seted up under gasbag inflation state, thereby the gasbag can produce the shrink when the inside air of gasbag is exhausted to the greatest extent and cause the closure to the hole to inside lubricating oil leaks under the gasbag contraction state of preventing, press the apron again repeatedly when needs overhaul, lubricate the screw rod with lubricating oil from the inside discharge of gasbag, conveniently dismantle.

Preferably, the holes are opened in an inflated state of the airbag, and the inside of the airbag is filled with lubricating oil.

Because the hole is opened under the gasbag inflation state, consequently can realize the closure to the hole because of self elastic action after the gasbag shrink, and then make the gasbag shrink after not extruding lubricating oil.

Preferably, the vent has been seted up to the upper end surface edge of apron, and the internal fixed surface of vent installs and shelters from the piece a plurality of, the length that shelters from the piece is greater than the radius of vent, and shelters from the piece and make up into the circular cone of directional downwards, shelter from the piece and be the rubber material, and it is unfixed between the adjacent piece that shelters from.

Because the vent internally mounted on the apron has a plurality of shielding pieces, and the shielding piece makes up into the circular cone of downward director, shielding piece receives ascending power under the effect of air resistance when the apron moves down, thereby it realizes sealed relatively to the vent to close coniform, and then the leakage of air when reducing the apron and pushing down, improve the inside gas filled speed of gasbag, and when the apron shifts up, under the effect of air resistance, shielding piece receives the decurrent power and expandes, thereby make the vent open, the circulation of air when making the apron rise, take out the air from the gasbag when avoiding the apron to move up.

Preferably, the clamping grooves are formed in the front end and the rear end of the inner surface of the threaded sleeve, the lower ends of the outer surfaces of the front end and the rear end of the screw rod are provided with through holes, a third groove is formed in the lower end of the inner portion of the through hole, a push rod is fixedly mounted at the center of the outer surface of the lower end of the cover plate and penetrates through the lower end of the push rod and extends to the first spring, the screw rod and the inside of the through hole, the push rod and the screw rod can slide up and down, clamping blocks are movably mounted at the front end and the rear end of the inside of the through hole, two clamping blocks are movably mounted opposite to each other, hinges are movably mounted between the traction rods and the clamping blocks, spring shafts are movably mounted between the two traction rods, and the clamping blocks penetrate through the inside of the clamping grooves.

The fastener is not shaken during the running process of the automobile, so that the mounted fastener is easy to loosen due to shaking, and regular maintenance is needed to ensure safety;

when the air spring tightening device works, firstly, the inner hexagonal wrench is inserted into the notch, the cover plate is extruded and contracted to the inside of the notch, the push rod of the push rod moves downwards in the screw rod in the downward moving process of the cover plate, so that the connecting part of the two traction rods is pushed by the push rod, the two traction rods are bent into a V shape under the action of the spring shaft and the hinge, the clamping block is pulled into the through hole along with the bending of the traction rods, the screw rod can be normally screwed into the mounting hole of the air spring, the thread of the threaded sleeve is sleeved with the tail end of the screw rod after being screwed, the fastening piece is produced according to the matching of the air spring, after the threaded sleeve is sleeved on the screw rod, the clamping groove on the inner surface of the threaded sleeve is correspondingly attached to the through hole on the screw rod, the inner hexagonal wrench is pulled out at the moment, the cover plate is pushed to move upwards under the resetting action of the first spring, then the cover plate pulls the push rod to move upwards to contact with the extrusion of the traction rods, and the spring shaft resets at the moment, the draw bar is pushed to be unfolded, so that the draw bar pushes the clamping block out of the through hole and is clamped into the clamping groove, the screw rod and the threaded sleeve are fixed, and the stability of the fastener after installation is improved.

Preferably, the two traction rods can be bent downwards into a V shape through the spring shaft and the hinge, and the traction rods penetrate through the third groove.

The connecting part of the two traction rods is pushed by the push rod, so that the two traction rods are bent into a V shape under the action of the spring shaft and the hinge, and the clamping block is pulled into the through hole along with the bending of the traction rods, so that the screw rod can be normally screwed into the mounting hole of the air spring.

Compared with the prior art, the invention has the beneficial effects that:

1. the baffle blocks clamp the inner hexagonal wrench from all directions of the notch, so that the screw and the inner hexagonal wrench are fixed together, the inner hexagonal wrench can be held to stretch the screw into a narrow space to install the air spring, the inner hexagonal wrench is pulled out of the notch after installation is finished, the cover plate is not extruded by the inner hexagonal wrench, the cover plate moves upwards inside the notch under the action of resetting of the first spring, so that the notch is closed, the problem that the notch is blocked by sundries entering the notch to cause difficulty in later maintenance and disassembly is solved, and meanwhile, after the inner hexagonal wrench is pulled out, the baffle blocks also stretch out of the second groove under the action of resetting of the second spring, so that the baffle blocks are utilized to limit the cover plate from the upper end of the notch, and the cover plate is prevented from being separated from the notch;

2. the expanded air bag discharges the internal lubricating oil through the holes under the action of air pressure, the lubricating oil flows along the surface of the screw rod, the surface of the screw rod is lubricated and maintained, the risk of rusting of the screw rod is reduced, the discharging of the lubricating oil is stopped until the air in the air bag is exhausted, the cover plate is repeatedly pressed again when maintenance is needed, the lubricating oil is discharged from the interior of the air bag to lubricate the screw rod, and the disassembly is convenient;

3. the draw bar pushes the clamping block out of the through hole and clamps the clamping block into the clamping groove, so that the screw rod and the threaded sleeve are fixed, and the stability of the fastener after installation is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a view of the screw and nut combination of the present invention;

FIG. 3 is a schematic view of the internal structure of the nut of the present invention;

FIG. 4 is a schematic view of the cover plate structure of the present invention;

FIG. 5 is a view of the screw of the present invention in combination with a bore;

FIG. 6 is a view of the combination of the screw and the fixture block of the present invention;

FIG. 7 is a schematic view of the structure of the insert of the present invention;

fig. 8 is a schematic view of the structure of the balloon of the present invention.

In the figure: 1. a screw; 2. a gasket; 3. a nut; 4. a notch; 5. a threaded sleeve; 6. a cover plate; 7. a first spring; 8. a stopper; 9. a first groove; 10. an air bag; 11. an air tap; 12. a push rod; 13. a second groove; 14. a second spring; 15. a vent; 16. a shielding sheet; 17. perforating; 18. a third groove; 19. a clamping block; 20. a draw bar; 21. a hinge; 22. a spring shaft; 23. a card slot; 24. and (4) holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, the present invention provides a technical solution:

a multi-section damping air spring fastener is shown in figures 1 to 3 and comprises a screw rod 1, a gasket 2, a screw cap 3, a notch 4, a threaded sleeve 5, a cover plate 6, a first spring 7, a stop block 8, a second groove 13 and a second spring 14, wherein the gasket 2 is fixedly arranged at the upper end of the screw rod 1, the screw cap 3 is fixedly arranged at the upper end of the gasket 2, the notch 4 is arranged at the upper end of the screw cap 3, the threaded sleeve 5 is sleeved at the lower end of the outer circular surface of the screw rod 1 in a threaded manner, the cover plate 6 is movably arranged at the upper end of the inner part of the notch 4, the first spring 7 is fixedly arranged at the middle position between the lower end of the inner part of the notch 4 and the outer surface of the lower end of the cover plate 6, the second groove 13 is arranged at the inner surface of the notch 4, the stop block 8 is movably arranged in the second groove 13, the second spring 14 is fixedly arranged in the second groove 13 and is positioned between the stop block 8 and the second groove 13, the outer surface of the upper end of the stop block 8 is an arc surface, and a notch is formed in the edge of the outer surface of the upper end of the cover plate 6, which corresponds to the stop block 8;

when the air spring is applied to an automobile base, a large amount of tail gas can be generated when an automobile runs, the tail gas contains a large amount of particles, the particles are mixed with incompletely combusted gasoline and then are extremely easy to attach to the surface of a fastener, so that a notch 4 of the fastener is blocked, the disassembly and maintenance of the air spring are influenced, in addition, the installation space of the air spring is narrow, and a screw 1 which is not convenient to take is directly inserted into an installation hole of the air spring;

when the fastener works, firstly, an inner hexagonal wrench for screwing the fastener is inserted into a notch 4 on a nut 3, at the moment, a cover plate 6 is extruded and contracted to the inside of the notch 4 by the inner hexagonal wrench, a first spring 7 is compressed and deformed, meanwhile, the inner hexagonal wrench is extruded to a stop block 8 by utilizing the arc surface of the inner hexagonal wrench after being contacted with the stop block 8, the stop block 8 is contracted to the inside of a second groove 13, the stop block 8 compresses a second spring 14, the second spring 14 provides opposite acting force for the stop block 8, so that the stop block 8 clamps the inner hexagonal wrench from all directions of the notch 4, a screw 1 and the inner hexagonal wrench are fixed together, as the fastener has lighter mass, the stop block 8 generates friction with the inner hexagonal wrench under the action of the elastic force of the second spring 14, the fastener is prevented from falling off from the inner hexagonal wrench due to self gravity, at the moment, the inner hexagonal wrench can be held to stretch a screw 1 into a narrow space to install an air spring, when in installation, the screw rod 1 is inserted into the installation hole of the flange plate on the air spring, then the screw rod 1 is screwed by an inner hexagonal wrench to realize threaded connection and fixation, the screw sleeve 5 is sleeved with the tail end of the screw rod 1 in a threaded manner after being screwed tightly, the screw rod 1 and the flange plate are further strengthened and fixed, the inner hexagonal wrench is pulled out from the notch 4 after the installation is finished, at the moment, the cover plate 6 is not extruded by the inner hexagonal wrench, under the action of the reset of the first spring 7, the cover plate 6 moves upwards in the notch 4 to close the notch 4, so as to prevent impurities from entering the notch 4 to block the notch 4 and cause the problem of difficult disassembly in later maintenance, meanwhile, after the inner hexagonal wrench is pulled out, the stop block 8 extends out of the second groove 13 under the reset action of the second spring 14, thereby limiting the cover plate 6 from the upper end of the notch 4 by the stopper 8 and preventing the cover plate 6 from being separated from the notch 4.

As an embodiment of the present invention, as shown in fig. 2 and 8, a first groove 9 is formed in an outer ring of the screw rod 1 at an edge of an outer surface of a lower end of the gasket 2, an air bag 10 is fixedly installed inside the first groove 9, an air tap 11 is fixedly installed on an outer surface of an upper end of the air bag 10, an upper end of the air tap 11 penetrates through the gasket 2 and is communicated with the notch 4, a plurality of holes 24 are formed in an inner circular surface of the air bag 10 at equal intervals, the air tap 11 is in a circular truncated cone shape with a wide upper end and a narrow lower end, the lower end of the air tap 11 penetrates through and extends into the air bag 10, the air tap 11 and the air bag 10 are made of the same material, the holes 24 are formed in an expanded state of the air bag 10, and lubricating oil is filled in the air bag 10;

the fastener can be oxidized and rusted after contacting air for a long time, so that the screw rod 1 is rusted and difficult to disassemble;

when the air spring fixing device works, firstly, the air spring is fixedly installed through a fastening piece, after the installation is finished, the air spring is moved up and down in the notch 4 by using an inner hexagonal wrench, the cover plate 6 is repeatedly extruded, the cover plate 6 is in piston motion, so that air is injected into the air bag 10 through the air nozzle 11, and the air bag 10 is expanded, because the air nozzle 11 is in a shape of a round table with a wide upper part and a narrow lower part, the lower end of the air nozzle 11 penetrates through and extends into the air bag 10, air is easily extruded into the air bag 10, the air bag 10 can extrude the air nozzle 11 deep into the air bag 10 after being expanded, so that the sealing is realized, the air leakage speed inside the air bag 10 is reduced, then, the expanded air bag 10 discharges the internal lubricating oil through the hole 24 under the action of air pressure, the lubricating oil flows along the surface of the screw rod 1, the lubricating maintenance on the surface of the screw rod 1 is realized, the rusting risk of the screw rod 1 is reduced, and the air inside the air bag 10 is exhausted completely, stop the discharge of lubricating oil to because the hole 24 is seted up under gasbag 10 inflation state, consequently gasbag 10 can produce when the inside air of gasbag 10 exhausts and contract thereby cause the closure to hole 24, with the inside lubricating oil leakage under the gasbag 10 shrink state of preventing, when needing to overhaul repeatedly press apron 6 once more, discharge lubricating oil from the inside of gasbag 10 and lubricate screw rod 1, conveniently dismantle.

As an embodiment of the present invention, as shown in fig. 4, an air vent 15 is opened at an edge of an outer surface of an upper end of the cover plate 6, a plurality of shielding pieces 16 are fixedly installed on an inner surface of the air vent 15, a length of each shielding piece 16 is greater than a radius of the air vent 15, the shielding pieces 16 are combined into a downward-pointing conical shape, the shielding pieces 16 are made of rubber, and adjacent shielding pieces 16 are not fixed;

during operation, because the vent 15 internally mounted on the apron 6 has a plurality of shielding pieces 16, and shielding piece 16 makes up into the coniform of pointing downwards, shielding piece 16 receives ascending power under the effect of air resistance when apron 6 moves down, thereby close coniform and realize sealed relatively to vent 15, and then reduce the leakage of air when apron 6 pushes down, improve the inside gas filled speed of gasbag 10, and when apron 6 moves up, under the effect of air resistance, shielding piece 16 receives the decurrent power and expandes, thereby make vent 15 open, make circulation of air when apron 6 rises, take out the air from gasbag 10 inside when avoiding apron 6 to move up.

As an embodiment of the present invention, as shown in fig. 2 and 5 to 6, the front end and the rear end of the inner surface of the threaded sleeve 5 are both provided with a clamping groove 23, the lower ends of the outer surfaces of the front end and the rear end of the threaded rod 1 are both provided with a through hole 17, the inner lower end of the through hole 17 is provided with a third groove 18, the center of the outer surface of the lower end of the cover plate 6 is fixedly provided with a push rod 12, the lower end of the push rod 12 penetrates through and extends to the inside of the first spring 7, the threaded rod 1 and the through hole 17, the push rod 12 and the threaded rod 1 can slide up and down, the front end and the rear end of the inside of the through hole 17 are both movably provided with clamping blocks 19, the opposite surfaces of the two clamping blocks 19 are movably provided with a traction rod 20, a hinge 21 is movably provided between the traction rod 20 and the clamping blocks 19, a spring shaft 22 is movably provided between the two traction rods 20, and the clamping blocks 19 penetrate through the clamping grooves 23, the two traction rods 20 can be bent downwards into a V shape through a spring shaft 22 and a hinge 21, and the traction rods 20 penetrate through the third groove 18;

the fastener is not shaken during the running process of the automobile, so that the mounted fastener is easy to loosen due to shaking, and regular maintenance is needed to ensure safety;

when the air spring fastening device works, firstly, the inner hexagonal wrench is inserted into the notch 4, at the moment, the cover plate 6 is extruded and contracted to the inside of the notch 4, the push rod 12 of the push rod moves downwards in the screw rod 1 in the downward moving process of the cover plate 6, so that the connecting part of the two traction rods 20 is pushed by the push rod 12, the two traction rods 20 are bent into a V shape under the action of the spring shaft 22 and the hinge 21, the fixture block 19 is pulled into the through hole 17 along with the bending of the traction rods 20, the screw rod 1 can be normally screwed into the mounting hole of the air spring, the screw sleeve 5 is sleeved with the tail end of the screw rod 1 in a threaded manner after being screwed, as the fastening pieces are produced in a matching manner according to the air spring, after the screw sleeve 5 is sleeved on the screw rod 1, the clamping groove 23 on the inner surface of the screw sleeve 5 is correspondingly attached to the through hole 17 on the screw rod 1, at the moment, the inner hexagonal wrench is pulled out, the cover plate 6 is pushed to move upwards under the reset action of the first spring 7, then the cover plate 6 pulls the push rod 12 to move upwards, the push rod 12 is contacted with the push rod to extrude the traction rod 20, the spring shaft 22 is reset at the moment, the traction rod 20 is pushed to expand, the clamping block 19 is pushed out of the through hole 17 by the traction rod 20 and clamped into the clamping groove 23, the screw rod 1 and the threaded sleeve 5 are fixed, and the stability of the fastener after installation is improved.

The working principle is as follows:

when the fastener works, firstly, an inner hexagonal wrench for screwing the fastener is inserted into a notch 4 on a nut 3, at the moment, a cover plate 6 is extruded and contracted to the inside of the notch 4 by the inner hexagonal wrench, a first spring 7 is compressed and deformed, meanwhile, the inner hexagonal wrench is extruded to a stop block 8 by utilizing the arc surface of the inner hexagonal wrench after being contacted with the stop block 8, the stop block 8 is contracted to the inside of a second groove 13, the stop block 8 compresses a second spring 14, the second spring 14 provides opposite acting force for the stop block 8, so that the stop block 8 clamps the inner hexagonal wrench from all directions of the notch 4, a screw 1 and the inner hexagonal wrench are fixed together, as the fastener has lighter mass, the stop block 8 generates friction with the inner hexagonal wrench under the action of the elastic force of the second spring 14, the fastener is prevented from falling off from the inner hexagonal wrench due to self gravity, at the moment, the inner hexagonal wrench can be held to stretch a screw 1 into a narrow space to install an air spring, when the air spring is installed, the screw rod 1 penetrates into a mounting hole of an upper flange plate of the air spring, then the screw rod 1 is screwed by using an inner hexagonal wrench to realize threaded connection and fixation, the screw sleeve 5 is screwed and sleeved at the tail end of the screw rod 1, the screw rod 1 and the flange plate are further reinforced and fixed, the inner hexagonal wrench is pulled out from the notch 4 after the installation is finished, at the moment, the cover plate 6 is not extruded by the inner hexagonal wrench, under the reset action of the first spring 7, the cover plate 6 moves upwards in the notch 4 to close the notch 4, the problem that the notch 4 is blocked by sundries entering the notch 4 to cause difficulty in later-stage maintenance and disassembly is prevented, meanwhile, after the inner hexagonal wrench is pulled out, the stop block 8 also extends out of the second groove 13 under the reset action of the second spring 14, the limit is carried out on the cover plate 6 from the upper end of the notch 4 by using the stop block 8, and the cover plate 6 is prevented from being separated from the notch 4, meanwhile, in the process that the cover plate 6 moves downwards, the push rod 12 moves downwards in the screw rod 1, so that the push rod 12 is used for pushing the connection position of the two traction rods 20, the two traction rods 20 are bent into a V shape under the action of the spring shaft 22 and the hinge 21, the clamping block 19 is pulled into the through hole 17 along with the bending of the traction rods 20, the screw rod 1 can be normally screwed into the mounting hole of the air spring, the threaded sleeve 5 is sleeved with the tail end of the screw rod 1 in a threaded manner after being screwed, as the fastening piece is produced according to the matching of the air spring, after the threaded sleeve 5 is sleeved on the screw rod 1, the clamping groove 23 on the inner surface of the threaded sleeve 5 is correspondingly attached to the through hole 17 on the screw rod 1, the inner hexagonal wrench is pulled out at the moment, the cover plate 6 moves upwards under the reset action of the first spring 7, then the cover plate 6 pulls the push rod 12 to move upwards to contact with the extrusion of the traction rod 20, at the moment, the spring shaft 22 resets to push the traction rods 20 to expand, so that the draw bar 20 pushes the fixture block 19 out of the through hole 17 and is clamped into the clamping groove 23, the screw 1 and the thread sleeve 5 are fixed, the stability of the fastener after installation is improved, the cover plate 6 is repeatedly extruded by utilizing an inner hexagonal wrench to move up and down in the notch 4 after installation, the cover plate 6 is in piston motion, air is injected into the air bag 10 through the air nozzle 11, and the air bag 10 is expanded, because the air nozzle 11 is in a circular truncated cone shape with a wide upper part and a narrow lower part, and the lower end of the air nozzle 11 penetrates through and extends into the air bag 10, the air is easily extruded into the air bag 10, the air nozzle 11 penetrating into the air bag 10 is extruded after the air bag 10 is expanded, so that sealing is realized, the air leakage speed inside the air bag 10 is reduced, then the inside lubricating oil is discharged through the hole 24 by the expanded air bag 10 under the action of air pressure, and the lubricating oil flows along the surface of the screw 1, the surface of the screw 1 is lubricated and maintained, the rusting risk of the screw 1 is reduced, the discharge of lubricating oil is stopped until the air in the air bag 10 is exhausted, and the holes 24 are formed in the expansion state of the air bag 10, so that the air bag 10 can shrink when the air in the air bag 10 is exhausted, the holes 24 are closed, the leakage of the internal lubricating oil in the contraction state of the air bag 10 is prevented, the cover plate 6 is repeatedly pressed when maintenance is needed, the lubricating oil is discharged from the air bag 10 to lubricate the screw 1, the disassembly is convenient, the shielding sheets 16 are arranged in the vent 15 on the cover plate 6, the shielding sheets 16 are combined into a downward-pointing conical shape, the shielding sheets 16 are upwards stressed under the action of air resistance when the cover plate 6 moves downwards, the conical shape is closed to realize relative sealing on the vent 15, and further the leakage of the air when the cover plate 6 is pressed downwards is reduced, the speed of inflating the inside of the airbag 10 is increased, and when the cover plate 6 moves upwards, the shielding piece 16 is forced downwards to expand under the action of air resistance, so that the vent 15 is opened, the air circulates when the cover plate 6 moves upwards, and the air is prevented from being drawn out of the inside of the airbag 10 when the cover plate 6 moves upwards.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.