CN211975745U

CN211975745U - Balanced air spring with elastic stopping piece

Info

Publication number: CN211975745U
Application number: CN202020368108.7U
Authority: CN
Inventors: 肖和平; 宁成; 王海洋; 罗琦洋; 李娟�; 宁焱
Original assignee: Beijing Lei Yan Nitrogen Spring Technology Research Institute; Jiangsu Sanqiao Intelligent Technology Co ltd
Current assignee: Beijing Lei Yan Nitrogen Spring Technology Research Institute; Jiangsu Sanqiao Intelligent Technology Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-11-20
Anticipated expiration: 2030-03-20

Abstract

A counterbalanced gas spring provided with an elastic stop, comprising: sealing member, the piston rod body and elasticity stop the piece, and elasticity stop the piece and include: the piston assembly, the piston gland and the air flow control part are arranged on the piston; wherein, the piston assembly includes: piston main part and rubber O type sealing washer are equipped with rubber O type sealing washer in this piston main part and lay the recess, and this rubber O type sealing washer is laid the recess and is used for the restriction rubber O type sealing washer's home range still is equipped with vertical through-hole in this piston main part, and this vertical through-hole one end accesss to and keeps away from piston gland one side, and the other end accesss to the air current and leads to the control, still is equipped with horizontal damping hole in vertical through-hole middle section, and this horizontal damping hole accesss to rubber O type sealing washer lays the recess, the utility model discloses an elasticity hinders and stops the piece, constitutes simple structure, and the part processing degree of difficulty.

Description

Balanced air spring with elastic stopping piece

Technical Field

The utility model relates to a balanced force air spring field especially relates to a balanced air spring with piece is stopped to elasticity.

Background

A gas spring (gas spring) is an industrial accessory which can play the roles of supporting, buffering, braking, height adjusting, angle adjusting and the like. It is composed of the following parts: the device comprises a pressure cylinder, a piston rod, a piston, a sealing guide sleeve, a filler (inert gas or oil-gas mixture), an in-cylinder control element, an out-cylinder control element (a controllable gas spring), a joint and the like. The principle is that inert gas or oil-gas mixture is filled in a closed pressure cylinder, the pressure in a cavity is several times or dozens of times higher than the atmospheric pressure, and the motion of a piston rod is realized by utilizing the pressure difference generated by the cross section area of the piston rod smaller than that of the piston. Due to the fundamental difference in principle, the gas spring has very remarkable advantages compared with the common spring: the speed is relatively slow, the dynamic force change is not large (generally within 1: 1.2), and the control is easy.

With the application fields of gas springs becoming wider and wider, the application of a balance force gas spring also has application requirements in multiple fields, such as the application numbers: cn201711296002.x discloses an air spring based high pressure micro-regulating valve. The air spring cavity and the air spring cavity welding base are connected by argon arc welding; the upper part of the air spring cavity is provided with a locking cover; the lower end face of the air spring is connected with the air spring connecting seat through a first inner hexagon bolt and is placed in the air spring cavity; the return spring is arranged between the air spring connecting seat and the air spring cavity welding base; the upper end of the valve fixing seat is connected with the air spring cavity welding base through a second inner hexagon bolt; the regulating valve is arranged at the lower end of the valve fixing seat; the regulating valve is connected with the air spring connecting seat through a valve coupling and a limiting connecting shaft.

If the application number is as follows: CN201920474811.3 discloses a nitrogen spring structure, which comprises a cylinder body, a plunger rod and an intermediate sleeve, wherein the cylinder body is provided with a cylinder body hole, the intermediate sleeve is hermetically connected to the upper part of the inner wall of the cylinder body hole, the plunger rod is hermetically connected with the inner hole of the intermediate sleeve in a sliding manner, the cylinder body hole of the cylinder body is filled with high-pressure nitrogen, the inner end surface of the plunger rod is provided with at least two steps of stepped bosses extending outwards, the inner wall of the intermediate sleeve is provided with an inwards extending stop boss and a limiting boss, a Y-shaped sealing ring is arranged in a sealing ring accommodating groove, and the periphery of the intermediate sleeve is provided with an; the outer end face of the plunger rod is provided with at least one stress surface which forms an inclined angle relative to the outer end face; the cylinder body hole bottom of cylinder body is equipped with the mounting hole, is fixed with the end cap mount pad on the mounting hole, is equipped with the end cap blind hole towards the cylinder body hole on the end cap mount pad.

The piston of the gas spring structure is too complex in composition, and the processing difficulty of parts is high, so that the application requirements of multiple fields are difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a balanced air spring with piece is stopped to elasticity hinders, this piston rod includes: sealing member, the one end setting that is equipped with airtight cavity are in the airtight cavity of sealing member, and the other end accesss to the outside piston rod body of sealing member and sets up in the sealing member and hinder the piece with piston rod body fixed connection's elasticity, and elasticity hinders and stops the piece and include: the air flow control device comprises a piston assembly fixedly arranged on a piston rod body, a piston gland fixedly connected with the piston rod body and arranged at one end of the piston assembly, and an air flow control piece arranged between the piston assembly and the piston gland;

wherein, the piston assembly includes: the piston main part that sets up with the inner wall clearance of sealing member and set up the rubber O type sealing washer that is used for the separation gas to flow in the piston main part, be equipped with rubber O type sealing washer in this piston main part and lay the recess, this rubber O type sealing washer lays the recess and is used for restricting the free distance and the cooperation of rubber O type sealing washer lays the recess both sides at this rubber O type sealing washer and forms sealed face, still is equipped with vertical through-hole in this piston main part, and this vertical through-hole one end is access to and is kept away from piston gland one side, and the other end is access to air current and is led to the control piece, still is equipped with horizontal damping hole in vertical through-hole middle section, and.

In one embodiment, a mounting concave step groove is arranged at the joint of the piston gland and the piston assembly and used for assembling the air flow control piece, and an opening is arranged on one side of the mounting concave step groove and communicated with a gap formed between the closed cavity and the piston main body.

In one embodiment, at least two longitudinal through holes are arranged on the piston main body in an annular shape at equal intervals.

In one embodiment, the airflow passage control comprises: the elastic pressing ring is arranged on one side, away from the longitudinal through hole, of the sealed pressing sheet and used for providing sealing resistance for the sealed pressing sheet.

In one embodiment, the elastic pressing ring and the rubber O-shaped sealing ring are made of elastic deformation materials.

In one embodiment, the elastic pressing ring is arranged in a fixed value ring shape, and the cross section of the elastic pressing ring can be circular or square.

In one embodiment, the piston gland and the piston body are provided with mounting holes at corresponding positions, and the mounting holes are used for fixedly assembling the elastic stopping piece and the piston rod body.

In one embodiment, a stepped rib or rivet flanging structure is arranged at the joint of the piston rod body and the piston gland, and the displacement of the piston gland is limited through the stepped structure.

In one embodiment, the seal comprises: the sleeve, set up at the direction sealing system of sleeve one end and set up the back stifled piece at the sleeve other end, elasticity hinders the piece setting in this sleeve, and the piston rod body one end hinders with elasticity and stops the piece and be connected, and the other end passes the direction sealing system and accesss to the external world.

In one embodiment, the guiding and sealing system includes a limiting member for preventing the piston rod from shaking during the displacement, and an O-ring disposed on the limiting member for ensuring that the air tightness inside the sleeve is not affected when the piston rod is displaced.

According to the utility model discloses a balanced air spring with piece is stopped to elasticity hinders constitutes simple structure, and the part processing degree of difficulty is low, can satisfy the application in many fields.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

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

FIG. 2 is a general schematic view of the elastic stop of the present invention;

FIG. 3 is a schematic view of the piston assembly of the elastic stop of the present invention;

FIG. 4 is a schematic view of the gas flow direction of the elastic stopper in the extended state;

FIG. 5 is a schematic view of the gas flow direction of the elastic stopper in a compressed state;

FIG. 6 is a schematic view of the piston body of the elastic stopping member of the present invention having a longitudinal through hole;

fig. 7 is a schematic structural view of the airflow control member of the elastic stopping member of the present invention.

Detailed Description

It should be noted that all the directional indicators (such as upper, lower, left, right, front, back, inner and outer, and the center … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Referring to fig. 1-3, a counterbalanced gas spring provided with an elastic stop, the piston rod comprising: the sealing device comprises a sealing element 2, a piston rod body 3 and an elastic stopping element 1, wherein a closed cavity 10 is arranged in the sealing element 2, one end of the piston rod body 3 is arranged in the sealing element 2, and the other end of the piston rod body 3 is communicated with the outside of the sealing element 2; this elasticity hinders and stops piece 1 and sets up in airtight cavity 10, includes: the air flow control device comprises a piston assembly 11 fixedly arranged on a piston rod body 3, a piston gland 12 arranged at one end of the piston assembly 11, and an air flow control piece 13 arranged between the piston assembly 11 and the piston gland 12;

wherein, piston assembly 11 includes: the piston comprises a piston main body 111 arranged in a clearance with the inner wall of the closed cavity 10 and a rubber O-shaped sealing ring 112 arranged on the piston main body 111 and used for blocking gas, wherein a rubber O-shaped sealing ring placing groove 113 is arranged on the piston main body 111, the rubber O-shaped sealing ring 112 placing groove 113 is used for limiting the moving distance of the rubber O-shaped sealing ring 112 and matching the rubber O-shaped sealing ring 112 to form sealing surfaces on two sides of the rubber O-shaped sealing ring placing groove 113, and the sealing surfaces are formed by 3 points of sealing formed by interference fit of the O-shaped sealing ring 112 with the inner wall of the sealing part 2, the groove bottom of the rubber O-shaped sealing ring placing groove 113 and the side end surface of the rubber O-shaped.

The piston main body 111 is further provided with a longitudinal through hole 114, one end of the longitudinal through hole 114 is communicated with one side far away from the piston gland 12, the other end of the longitudinal through hole 114 is communicated with the air flow control member 13, the middle section of the longitudinal through hole 114 is further provided with a transverse damping hole 115, the transverse damping hole 115 is communicated with a rubber O-shaped sealing ring mounting groove 113 provided with a rubber O-shaped sealing ring 112, and when the rubber O-shaped sealing ring 112 is positioned at any end of the rubber O-shaped sealing ring mounting groove 113, the rubber O-shaped sealing ring 112 is required to expose the transverse damping hole 115 for.

The elastic stopper 1 blocks the sealed chamber 10 into two first and

second chambers

6 and 5 that can only circulate gas through the longitudinal through hole 114. When no external force is applied, the gas pressure in the first cavity 6 and the second cavity 5 is the same, because the area of the piston gland 12 exposed in the first cavity 6 is smaller than the area of the piston body 111 exposed in the second cavity 5, so the elastic stopping member 1 always has a pushing force which makes the piston rod body 3 and the elastic stopping member 1 extend outwards, as shown in fig. 4, when the elastic stopping member 1 extends and displaces from the piston body 111 to the piston gland 12, the gas in the second cavity 5 flows to the position of the rubber O-ring 112 through the gap formed between the piston body 111 and the sealed cavity 10, the rubber O-ring 112 displaces in the direction away from the piston gland 12 to expose the transverse damping hole 115, the transverse damping hole 115 connects the gap formed between the piston body 111 and the sealed cavity 10 with the longitudinal through hole 114, the gas in the second cavity 5 displaces according to the distance of the elastic stopping member 1, part of the gas is transferred into the first cavity 6 to complete circulation, and the gas pressure in the two cavities is maintained in a balanced state through the transfer of the gas between the two cavities;

as shown in fig. 5, because of the initial pushing force, the elastic stopping member 1 is only compressed and displaced from the piston gland 12 to the piston main body 111 under the action of an external force, the gas flows to the gas flow control member 13 through the longitudinal through hole 114 and the gap formed between the piston main body 111 and the sealed cavity 10, and the gas flow control member 13 is deformed under the influence of the gas pressure to communicate the first cavity 6 and the second cavity 5, so as to maintain the equilibrium state of the gas pressures in the two cavities.

This elasticity hinders and stops piece 1 and realizes the function of balanced power air spring through simple structure setting, and its part processing degree of difficulty is low, has satisfied the application demand in different fields.

Preferably, the piston cover 12 is separated from the piston assembly 11, a mounting concave step groove 121 is further formed at the joint of the piston cover 12 and the piston assembly 11, the mounting concave step groove 121 is used for assembling the air flow control member 13, and an opening 122 is formed at one side of the mounting concave step groove 121, and the opening 122 is communicated with the second chamber 5. The longitudinal through hole 114 communicates with the second chamber 5 through the opening 122 by the gas flowing out of the gas flow control member 13.

Referring to fig. 6, at least two longitudinal through holes 114 are formed in the piston body 111 in a ring shape at equal intervals. The arrangement of the longitudinal through holes 114 at equal intervals is favorable for the stability of the operation of the elastic stopping piece 1, and ensures that the elastic stopping piece 1 cannot be clamped in a closed cavity due to uneven air pressure when the displacement occurs.

Referring to fig. 7, the air flow control member 13 includes: a sealing pressing sheet 131 arranged on the longitudinal through hole 114 for sealing the longitudinal through hole 114, and an elastic pressing ring 132 arranged on one side of the sealing pressing sheet 131 far away from the longitudinal through hole 114 for providing sealing resistance for the sealing pressing sheet 131.

One side of the longitudinal through hole 114 is sealed by arranging the sealed pressing sheet 131 and the elastic pressing ring 132, the rubber O-shaped sealing ring 112 displaces in the process of stretching displacement to communicate the second cavity 5 with the transverse damping hole 115, gas in the second cavity 5 can only circulate to the transverse damping hole 115 arranged at the position of the rubber O-shaped sealing ring 112 through a gap formed between the piston main body 111 and the sealed cavity 10, the transverse damping hole 115 communicates the gap formed between the piston main body 111 and the sealed cavity 10 with the longitudinal through hole 114, and the circulation of the gas from the second cavity 5 to the first cavity 6 is completed;

in the process of compression displacement, the rubber O-shaped sealing ring 112 displaces, the gap formed between the transverse damping hole 115 and the second cavity 5 and the gap formed between the piston main body 111 and the closed cavity 10 are sealed, gas is led to the closed pressing sheet 131 through the longitudinal through hole 114, the side outlet of the longitudinal through hole 114 is sealed similarly due to the interference fit of the closed pressing sheet 131 and the elastic pressing ring 132, so that the required supporting balance force is generated, and only when the external force of pressing is used for forcing the gas to push the closed pressing sheet 131 open, the gas in the first cavity 6 can be circulated to the second cavity 5.

Further, the contact area between the sealing pressing sheet 131 and the elastic pressing ring 132 after receiving pressure can be set to achieve the purpose of external force setting.

Further, the elastic pressing ring 132 and the rubber O-ring 112 are made of an elastic deformable material.

Furthermore, the elastic pressing ring 132 and the rubber O-ring 112 are disposed in a ring shape, and the cross-section of the elastic pressing ring 132 and the rubber O-ring 112 may be circular or square.

Preferably, the piston gland 12 and the piston body 111 are provided with mounting holes 14 at corresponding positions, and the mounting holes 14 are used for assembling the elastic stopper 1 with other devices.

Further, a stepped structure 31 is arranged at the joint of the piston rod body 3 and the piston gland 12, and the stepped structure limits the displacement of the piston gland 12.

Preferably, the piston rod body 3 is assembled with the elastic stopper 1 through the mounting holes 14 provided on the piston body 111 and the piston gland 12, respectively.

As shown in connection with fig. 1, the seal 2 comprises: the sleeve 21, set up the guide seal system 22 in sleeve 21 one end and set up the back stifled piece 23 in the sleeve 21 other end, elasticity hinders that piece 1 sets up in this sleeve 21, and the piston rod body 3 one end is connected with elasticity hinders piece 1, and the other end passes guide seal system 22 and leads to the external world.

Further, the sleeve 21 is provided in a hollow cylindrical shape, and may be any cylindrical shape such as a cylindrical shape, a square cylindrical shape, and the like.

The elastic stopping piece 1 is correspondingly arranged according to the hollow shape of the sleeve 21, so that the elastic stopping piece 1 is always matched with the inner wall of the sleeve 21.

Preferably, the guiding and sealing system 22 includes a limiting member 221 and an O-ring 222 disposed on the limiting member 221, the limiting member 221 is used for preventing the piston rod body 3 from shaking during the displacement process, and the O-ring 222 is disposed on one side of the limiting member 221 for ensuring that the air tightness inside the sleeve 21 is not affected when the piston rod body 3 is displaced.

Preferably, the end of the piston rod body 3 remote from the elastic stopper 1 is provided with a connecting structure 4, and the connecting structure 4 is used for connecting the piston rod body 3 with other structures.

Further, the end of the rear blocking element 23 remote from the elastic blocking element 1 is also provided with a connecting structure 4. The piston rod can be assembled on other structures by means of the connecting structure 4. For example: the connecting structure 4 at one end of the rear plug 23 is connected with the windowsill, and the connecting structure 4 at one end of the piston rod body 3 is connected with the window to realize the function of the windowsill supporting rod. Furthermore, the piston rod can be used in different fields by means of the connecting structure 4.

In one embodiment, a weight is arranged on the piston rod body 3 via the connecting structure 4, the weight force of the weight is equal to and opposite to the initial existing thrust force of the elastic stopping member 1, so that after the weight is arranged, the elastic stopping member 1 is in a force balance state without other additional force.

In this force equilibrium state the elastic stop 1 is stationary, in which state the elastic stop 1 can only be displaced to perform an extension or compression movement upon application of additional power.

In the displacement process, the first cavity 6 and the second cavity 5 are communicated through the longitudinal through hole 114 of the elastic stopping member 1, the pressure intensity of the gas in unit area in the two cavities is kept to be the same, the displacement of the elastic stopping member 1 is stopped after the external force action is lost, and the elastic stopping member 1 is still in a force balance state.

The utility model discloses a theory of operation does: the air pressure of the first cavity 6 and the second cavity 5 in the piston rod is set, so that the supporting force provided by the air pressure of the first cavity 6 is equal to or slightly less than the minimum gravity of a support, when the elastic stopping piece 1 is compressed inwards, the rubber O-shaped sealing ring 112 arranged in the rubber O-shaped sealing ring mounting groove 113 is displaced to abut against one end, close to the piston rod body 3, of the rubber O-shaped sealing ring mounting groove 113 and the inner wall of the sleeve 21, so that the sealing of the first cavity 6 is formed, the power gas can be held by the sealing, the required supporting balance force is generated, the air can be forced to push the closed pressing piece 6 open only by applying external pressure force, the power gas on two sides of the elastic stopping piece 1 can flow to the first cavity 6, and the piston rod can perform compression movement.

When the piston rod extends outwards, the rubber O-ring 112 in the rubber O-ring receiving groove 113 is displaced against the end of the rubber O-ring receiving groove 113 close to the first cavity 6 and the inner wall of the sleeve 21, forming a seal for the second cavity 5, but the motive gas is passed through the second cavity 5 through the gap between the outer diameter of the elastic stopper 1 and the inner diameter of the sleeve 21, and then through the transverse damping hole 115 to the first cavity 6.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A counterbalanced gas spring provided with an elastic stop, comprising: sealing member, the one end setting that is equipped with airtight cavity is in the airtight cavity of sealing member, the other end accesss to the outside piston rod body of sealing member and setting are in the sealing member with piston rod body fixed connection's elasticity hinders and stops the piece, its characterized in that, elasticity hinders and stops the piece and includes: the air flow control device comprises a piston assembly fixedly arranged on the piston rod body, a piston gland arranged at one end of the piston assembly and fixedly connected with the piston rod body, and an air flow control piece arranged between the piston assembly and the piston gland;

wherein the piston assembly comprises: with the piston main part and the setting that the inner wall clearance of sealing member set up are in be used for the rubber O type sealing washer of separation gas flow in the piston main part, be equipped with rubber O type sealing washer in this piston main part and lay the recess, this rubber O type sealing washer is laid the recess and is used for the restriction the live distance and the cooperation of rubber O type sealing washer lays the recess both sides at this rubber O type sealing washer and forms sealed face, still is equipped with vertical through-hole in this piston main part, and this vertical through-hole one end is accesss to and is kept away from piston gland one side, the other end accesss to the control is led to the air current vertical through-hole middle section still is equipped with horizontal damping hole, and this horizontal damping hole is.

2. The counterbalanced gas spring provided with an elastic stop according to claim 1, wherein a mounting recessed step groove for fitting the gas flow passage control member is provided at a junction of the piston gland and the piston assembly, and an opening communicating a gap formed between the airtight chamber and the piston main body is provided at one side of the mounting recessed step groove.

3. The counterbalanced gas spring provided with an elastic stop according to claim 1, wherein said longitudinal through holes are provided in at least two, annularly equidistant on the piston body.

4. The counterbalanced gas spring provided with an elastic stop according to claim 1, wherein said gas flow control member comprises: the elastic pressing ring is arranged on one side, away from the longitudinal through hole, of the closed pressing sheet and used for providing closed resistance for the closed pressing sheet.

5. The counterbalanced gas spring provided with an elastic stop according to claim 4, wherein said elastic pressure ring and said rubber O-ring are both made of an elastically deformable material.

6. The counterbalanced gas spring provided with an elastic stop according to claim 4, wherein said elastic clamping ring is provided in a constant value annular shape and can be circular or square in cross-section.

7. The counterbalanced gas spring provided with an elastic stop according to claim 1, wherein the piston gland and the piston body are provided with mounting holes at corresponding positions for fixedly assembling the elastic stop with the piston rod body.

8. The counterbalanced gas spring provided with an elastic stop according to claim 7, wherein a stepped thread or a rivet-flanging structure is provided at a connection of the piston rod body and the piston gland, and displacement of the piston gland is restricted by the stepped structure.

9. The counterbalanced gas spring provided with an elastic stop according to claim 1, wherein said seal comprises: the elastic stopping piece is arranged in the sleeve, one end of the piston rod body is connected with the elastic stopping piece, and the other end of the piston rod body penetrates through the guide sealing system to be led to the outside.

10. The balanced gas spring with elastic stop according to claim 9, characterized in that the guiding and sealing system comprises a stop member for preventing the piston rod body from shaking during displacement and an O-ring seal provided on the stop member for ensuring that the tightness of the interior of the sleeve is not affected during displacement of the piston rod body.