CN216589723U

CN216589723U - Damping-adjustable gas spring

Info

Publication number: CN216589723U
Application number: CN202123373224.1U
Authority: CN
Inventors: 冯永明
Original assignee: Yangzhou Mingqing Pneumatic Technology Co ltd
Current assignee: Yangzhou Mingqing Pneumatic Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-05-24
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses an adjustable air spring of damping relates to the air spring field, including cylinder, piston rod and isolation piston, be equipped with the well plenum chamber that supplies ejector pin, case and seal assembly to hold in the piston rod, the ejector pin is connected with the case, and the seal assembly cover is established on the case, forms damping hole and runner on the piston, and the damping hole is coaxial with the case, and the inner end of case can be closed the damping hole completely and expose completely, flows into the damping oil in the piston via the runner from the damping hole and flows, and the ejector pin adopts the mode of screw precession to remove in the piston rod. This scheme is on prior art's basis, with the mode that adopts the screw precession between ejector pin and the piston rod for the ejector pin drives the case when the screw precession, and when closing the damping hole totally and exposing the state totally, can both ensure the steady state of case, thereby can guarantee the stability of the extension gesture of piston rod.

Description

Damping-adjustable gas spring

Technical Field

The utility model relates to an air spring field specifically is the adjustable air spring of damping.

Background

The existing bidirectional locking damping gas spring has single use working condition due to the unadjustable damping force, can only be solved by replacing the shock absorber when meeting the working conditions with different damping requirements, and cannot adapt to the damping requirements required by mechanisms under various different working conditions.

Chinese utility model CN206072199U discloses a two-way locking damping air spring of adjustable damping, the above-mentioned problem has been solved, but discover when in actual use, it is with the help of certain instrument (for example knob), the adoption is with the inside propulsive mode of ejector pin to the piston rod, the ejector pin adopts relative slip's mode with the piston rod promptly, because cylinder internal pressure is great, the ejector pin needs just can impel in the piston rod at great external force, and after impelling the ejector pin suitable position, when the twinkling of an eye of unloading external force, damping oil can produce an instantaneous punching force to the case terminal surface via the runner, cause the condition of ejector pin secondary displacement easily, probably can't make the case close the damping hole completely, reach the adjustable purpose of damping.

To the above problem, the utility model provides an adjustable air spring of damping.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adjustable air spring of damping is equipped with the well plenum chamber that supplies ejector pin, case and seal assembly to hold in the piston rod, and the ejector pin is connected with the case, and the seal assembly cover is established on the case, forms damping hole and runner on the piston, and the damping hole is coaxial with the case, and the inner end of case can be closed the damping hole completely and expose completely, flows into the damping oil in the piston via the runner from the damping hole and flows, and the ejector pin adopts the mode that the screw thread precession to remove in the piston rod. This scheme is on prior art's basis, with the mode that adopts the screw precession between ejector pin and the piston rod for the ejector pin drives the case when the screw precession, and when closing the damping hole totally and exposing the state totally, can both ensure the steady state of case, thereby can guarantee the stability of the extension gesture of piston rod, thereby solved the problem among the background art.

In order to achieve the above object, the utility model provides a following technical scheme: damping adjustable air spring, including the cylinder, piston rod and isolation piston, still set gradually the guide ring on the piston rod, sealing washer and piston, it has damping oil and high-pressure nitrogen gas to store respectively to keep apart the corresponding cylinder cavity in piston both sides, be equipped with in the piston rod and supply the ejector pin, well cavity that case and seal assembly held, the ejector pin is connected with the case, the seal assembly cover is established on the case, form damping hole and runner on the piston, the damping hole is coaxial with the case, the inner end of case can be closed the damping hole completely and expose completely, the damping oil that flows into in the piston from the damping hole flows out via the runner, the ejector pin adopts the mode of screw precession to remove in the piston rod.

Furthermore, a threaded cylinder is fixed at one end of the hollow cavity of the piston rod, which is close to the piston, and the threaded cylinder is in threaded connection with a thread part which is formed and processed on the outer peripheral surface of the corresponding position of the valve core.

Furthermore, a stepped groove for accommodating the flow stopping sheet is formed in one end face, back to the damping oil, of the damping hole of the piston, a sealing embedded groove for embedding a sealing gasket is formed in the peripheral face of the stepped groove, the flow stopping sheet is fixed on the corresponding end face of the valve core, and the sealing gasket is arranged on the peripheral edge of the surface of the flow stopping sheet.

Furthermore, an O-shaped ring is arranged between the piston and the inner wall of the cylinder barrel.

Furthermore, at least two O-shaped rings are arranged between the isolation piston and the inner wall of the cylinder barrel.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model provides an adjustable air spring of damping, on prior art's basis, with the mode that adopts the screw thread precession between ejector pin and the piston rod for the ejector pin drives the case when closing the damping hole completely and exposing the state completely when the screw thread precession, can both ensure the steady state of case, thereby can guarantee the stability of the extension gesture of piston rod.

2. The utility model provides an adjustable air spring of damping, when the case was closed the damping hole completely, the stagnant flow piece can extend to the ladder groove in, meanwhile, seal ring can be just with sealed caulking groove seal cooperation to improve the sealed effect when the damping hole closes completely.

Drawings

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

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

fig. 3 is a schematic structural view of the stop flow sheet and the sealing washer of the present invention.

In the figure: 1. a cylinder barrel; 2. a piston rod; 3. a top rod; 4. a piston; 41. a stepped groove; 42. sealing the caulking groove; 43. a damping hole; 44. a flow channel; 5. an isolation piston; 6. a valve core; 61. a screw thread portion; 7. damping oil; 8. high pressure nitrogen; 9. a flow stopping sheet; 10. a sealing gasket; 11. a threaded barrel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the damping adjustable gas spring includes a cylinder barrel 1, a piston rod 2 and an isolation piston 5, the piston rod 2 is further sequentially provided with a guide ring, a seal ring and a piston 4, two sides of the isolation piston 5 are respectively stored with damping oil 7 and high-pressure nitrogen 8 corresponding to a chamber of the cylinder barrel 1, a hollow chamber for accommodating a push rod 3, a valve core 6 and a seal assembly is arranged in the piston rod 2, the push rod 3 is connected with the valve core 6, the seal assembly is sleeved on the valve core 6, a damping hole 43 and a flow passage 44 are formed on the piston 4, the damping hole 43 is coaxial with the valve core 6, the damping hole 43 can be completely closed and completely exposed at the inner end of the valve core 6, the damping oil 7 flowing into the piston 4 from the damping hole 43 flows out through the flow passage 44, and the push rod 3 moves in the piston rod 2 in a screw thread precession manner.

A threaded cylinder 11 is fixed at one end of the hollow cavity of the piston rod 2, which is close to the piston 4, and the threaded cylinder 11 is in threaded connection with a thread part 61 which is formed and processed on the outer peripheral surface of the corresponding position of the valve core 6;

the purpose of the present invention is to adopt a mode of pushing the ejector rod 3 into the piston rod 2 by means of a certain tool (such as a knob) in the prior art, that is, the ejector rod 3 and the piston rod 2 adopt a relative sliding mode, because the internal pressure of the cylinder 1 is large, the ejector rod 3 can be pushed into the piston rod 2 only by a large external force, and after the ejector rod 3 is pushed to a proper position, at the moment of removing the external force, the damping oil 7 will generate an instantaneous punching force on the end surface of the valve core 6 through the flow channel 44, which is easy to cause the situation of secondary displacement of the ejector rod 3, possibly the valve core 6 cannot completely close the damping hole 43, and the purpose of damping adjustment cannot be achieved, in the present scheme, on the basis of the prior art, a mode of screwing the ejector rod 3 into the piston rod 2 by a thread is adopted, so that when the ejector rod 3 is screwed into the thread, the valve core 6 is driven to be in a state of completely closing and completely exposing the damping hole 43, the stable state of the valve element 6 can be ensured, and the extended posture of the piston rod 2 can be ensured to be stable.

A stepped groove 41 for accommodating the flow stopping sheet 9 is formed on one end face of a damping hole 43 of the piston 4, which faces away from the damping oil 7, a sealing embedded groove 42 for embedding a sealing gasket 10 is formed on the peripheral surface of the stepped groove 41, the flow stopping sheet 9 is fixed on the corresponding end face of the valve core 6, and the sealing gasket 10 is arranged on the peripheral edge of the surface of the flow stopping sheet 9;

its aim at, prior art utilizes the toper terminal surface of case 6 to reach the purpose of sealing damping hole 43, and this makes the contact leakproofness between case 6 and the damping hole 43 not good, and when case 6 closed damping hole 43 completely in this application, flow stopping piece 9 can extend to in the ladder groove 41, and meanwhile, sealing washer 10 can be just sealed with sealed caulking groove 42 and cooperate to improve the sealed effect when damping hole 43 closed completely.

An O-shaped ring is arranged between the piston 4 and the inner wall of the cylinder barrel 1.

At least two O-shaped rings are further arranged between the isolation piston 5 and the inner wall of the cylinder barrel 1, and multiple sealing effects are achieved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various 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.

Claims

1. The air spring with the adjustable damping comprises a cylinder barrel (1), a piston rod (2) and an isolation piston (5), wherein a guide ring, a sealing ring and a piston (4) are sequentially arranged on the piston rod (2), damping oil (7) and high-pressure nitrogen (8) are respectively stored in two sides of the isolation piston (5) corresponding to chambers of the cylinder barrel (1), a hollow chamber for accommodating a push rod (3), a valve core (6) and a sealing assembly is arranged in the piston rod (2), the push rod (3) is connected with the valve core (6), the sealing assembly is sleeved on the valve core (6), a damping hole (43) and a flow channel (44) are formed in the piston (4), the damping hole (43) is coaxial with the valve core (6), the inner end of the valve core (6) can completely close and completely expose the damping hole (43), and the damping oil (7) flowing into the piston (4) from the damping hole (43) flows out through the flow channel (44), the method is characterized in that: the ejector rod (3) moves in the piston rod (2) in a threaded screwing mode.

2. The damped adjustable gas spring as set forth in claim 1 wherein: a threaded cylinder (11) is fixed at one end of a hollow cavity of the piston rod (2) close to the piston (4), and the threaded cylinder (11) is in threaded connection with a thread part (61) formed on the outer peripheral surface of the corresponding position of the valve core (6).

3. The damped adjustable gas spring as set forth in claim 1 wherein: the one end face of damping hole (43) of piston (4) damping oil (7) dorsad forms supply to end ladder groove (41) that class piece (9) held, offer on the global of ladder groove (41) and supply sealing washer (10) to inlay sealed caulking groove (42) of establishing, end class piece (9) are fixed on case (6) correspond the terminal surface, sealing washer (10) are established and are followed all around the surface of ending class piece (9).

4. The damped adjustable gas spring as set forth in claim 1 wherein: an O-shaped ring is arranged between the piston (4) and the inner wall of the cylinder barrel (1).

5. The damped adjustable gas spring as set forth in claim 1 wherein: at least two O-shaped rings are arranged between the isolation piston (5) and the inner wall of the cylinder barrel (1).