CN209587020U

CN209587020U - Damping shock absorber

Info

Publication number: CN209587020U
Application number: CN201822129087.9U
Authority: CN
Inventors: 卫德义
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2019-11-05
Anticipated expiration: 2028-12-18

Abstract

The disclosure provides a kind of damping shock absorber.The damping shock absorber includes outer cylinder, inner cylinder, floating plug, piston shaft and piston.Inner cylinder is set in outer cylinder along the axial direction of outer cylinder, and the first end of inner cylinder and the top end part of outer cylinder seal and cooperate, and second end extends to the bottom end of outer cylinder；The side wall of inner cylinder is equipped with airflow channel and multiple damp channels, and each damp channel is located at side and axially spaced distribution of the airflow channel close to bottom end.Floating plug is slideably sheathed on outside inner cylinder, forms oil pocket and air cavity；Airflow channel connection air cavity and inner cylinder, damp channel are connected to oil pocket and inner cylinder.Piston shaft is slidably disposed through top end part setting and penetrates inner cylinder, and seals and cooperate with top end part.Piston seal slidingly against be matched in inner cylinder and with piston axis connection；When piston slides into first position, piston covers or exposes airflow channel and exposes each damp channel, and when piston slides into the second position, piston covers a part in each damp channel and exposes airflow channel.

Description

Damping shock absorber

Technical field

This disclosure relates to cushion technique field, in particular to a kind of damping shock absorber.

Background technique

Currently, damper has been widely used for the fields such as elevator, vehicle and building, by damper to colliding Or the component of vibration is buffered, to play the role of guard block.It is real that existing damper usually utilizes the elasticity of spring Existing damping.But spring is easy failure after repeatedly stretching, and is unfavorable for improving the service life of damper.Meanwhile for big The occasion of impact, spring will bear biggish pressure, thus need to increase the size of spring, this will lead to damper volume and Weight is larger, and dismounting is inconvenient, also results in and is increased using the weight of the equipment of damper.

It should be noted that information is only used for reinforcing the reason to the background of the disclosure disclosed in above-mentioned background technology part Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.

Utility model content

The disclosure is designed to provide a kind of damping shock absorber, can be improved the stationarity of shock absorbing process, and is conducive to It improves service life, reduce weight and occupied space.

According to one aspect of the disclosure, a kind of damping shock absorber is provided, comprising:

Outer cylinder has Packed top end part and bottom end；

Inner cylinder, the axial direction along the outer cylinder are set in the outer cylinder, and have a first end and a second end, the first end with The top end part sealing cooperation, the second end extend to the bottom end；The side wall of the inner cylinder is equipped with airflow channel and more A damp channel, each damp channel are respectively positioned on the airflow channel close to the side of the bottom end, and axially spaced Distribution；

Floating plug is slideably sheathed on outside the inner cylinder, and simultaneously with the inner cylinder and the outer cylinder sealing cooperate, with The oil pocket that can accommodate hydraulic oil is formed between the floating plug and the bottom end, being formed between the floating plug and the top end part can hold Receive the air cavity of gas；The airflow channel is connected to the air cavity and the inner cylinder, and each damp channel is connected to the oil pocket With the inner cylinder；

Piston shaft is slidably disposed through the top end part setting, and penetrates the inner cylinder, and matches with top end part sealing It closes；

Piston is sealed slidingly against and is matched in the inner cylinder, and with the piston axis connection；It is slid into the piston When first position, the piston covers or exposes the airflow channel, and exposes each damp channel, slides in the piston When to the second position, the piston at least covers a part in each damp channel, and exposes the airflow channel.

In a kind of exemplary embodiment of the disclosure, the airflow channel includes the stomata of multiple annular spreads；And/or

Each damp channel includes the damping hole of multiple annular spreads.

In a kind of exemplary embodiment of the disclosure, it is formed with and is connected between the second end of the inner cylinder and the bottom end Oil duct inside and outside inner cylinder, when the piston slides into the second position, the piston covers each damp channel, and exposes institute State airflow channel and the oil duct.

In a kind of exemplary embodiment of the disclosure, the damping shock absorber further include:

Pedestal, cooperation is set in the outer cylinder, and is connect with the bottom end, and the second end contact of the inner cylinder is in described Pedestal simultaneously seals cooperation with the pedestal；The oil duct is set to the pedestal, and is connected to the inner cylinder and the oil pocket.

In a kind of exemplary embodiment of the disclosure, the pedestal be ring structure, the periphery of the pedestal with it is described Outer cylinder matching, the second end contact of the inner cylinder is in the pedestal and the space that surrounds with the pedestal is connected to；The pedestal is remote The inner edge of end face from the inner cylinder is equipped with annular groove, and the pedestal is equipped with connecting hole, the company close to the end face of the inner cylinder It connects hole and is connected to the annular groove and the oil pocket, to form the oil duct.

In a kind of exemplary embodiment of the disclosure, the outer cylinder includes:

Cylinder；

First plug is sealedly attached to described cylinder one end, and to form the top end part, the piston shaft is slideably worn Cross first plug；

Second plug is sealedly attached to the other end of the cylinder, to form the bottom end.

In a kind of exemplary embodiment of the disclosure, first plug includes:

First sealing, sealing are matched in the cylinder, and it is close towards the top end part to be resisted against the inner cylinder One end；

Second sealing, sealing is matched in the inner cylinder, and is connect with first sealing；

The piston shaft is slidably disposed through first sealing and second sealing, and at least with described first The sealing cooperation of one of sealing and second sealing.

In a kind of exemplary embodiment of the disclosure, first plug is equipped with the mounting hole being connected to the air cavity, The damping shock absorber further include:

Pneumatic head is set to the mounting hole, for inputting gas to the air cavity.

In a kind of exemplary embodiment of the disclosure, the pneumatic head includes:

Seal, sealing are matched in the mounting hole；

Extension, is connected to the bottom end close to the side of the air cavity, and between having between the inner wall of the hole installing Gap；

Air drain, set on the periphery of the extension, and the air drain is annular；

Gas distribution channel, one end is located at the seal, and is in communication with the outside, and the other end extends to the extension, and with The air drain bottom connection；

Elastic ring is set in the air drain and covers the gas distribution channel, and the elastic ring can be jacked up by gas, so that institute Gas distribution channel is stated to be connected to the mounting hole.

In a kind of exemplary embodiment of the disclosure, second plug is equipped with the oil transportation hole being connected to the oil pocket, The damping shock absorber further include:

Closeouts removably block the oil transportation hole.

The damping shock absorber of the disclosure, in the case where piston shaft is not pressurized, piston can be located at first position, at this point, living Airflow channel is exposed in plug masking, and exposes each damp channel, since each damp channel is connected to oil pocket and inner cylinder, so that in inner cylinder With hydraulic oil is accommodated in oil pocket.When piston shaft is pressurized and moves into outer cylinder, i.e., when mobile to the second position, can drive The hydraulic oil in inner cylinder is discharged to oil pocket through damp channel in hydraulic oil in piston press inner cylinder, can with the movement of piston Damp channel is blocked one by one.In the process, the damp channel that can be discharged for hydraulic oil gradually decreases, so that hydraulic oil is to piston Damping action be gradually increased, to play buffering, the effect of damping to piston.At the same time, the hydraulic oil of oil pocket increases, and makes Floating plug is mobile to top end part, and the gas in air cavity can be pressed into inner cylinder by floating plug by airflow channel is located at piston close to top end part Space, to guarantee the smooth movement of piston.

When piston shaft pressure releases, the gas in inner cylinder can return to air cavity and floating plug pushed to move backward, will be oily Intracavitary hydraulic oil is squeezed into inner cylinder, thus keep piston reverses direction mobile, i.e., it is mobile to first position, and in the process, piston Shielded damp channel is gradually exposed, first position is returned to until blocking, to realize the reset of piston and piston shaft.

In above process, it avoids and buffering is realized using spring, be conducive to improve service life, reduce weight and occupancy Space.Meanwhile damp channel is gradually blocked by piston, it gradually changes hydraulic oil to the damping of piston, makes the movement of piston It is more gentle, to improve the stationarity of shock absorbing process.

It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not The disclosure can be limited.

Detailed description of the invention

The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure Example, and together with specification for explaining the principles of this disclosure.It should be evident that the accompanying drawings in the following description is only the disclosure Some embodiments for those of ordinary skill in the art without creative efforts, can also basis These attached drawings obtain other attached drawings.

Fig. 1 is the unpressed schematic diagram of disclosure example embodiment damping shock absorber.

Fig. 2 is the compressed schematic diagram of disclosure example embodiment damping shock absorber.

Fig. 3 is the enlarged drawing in the portion A in Fig. 1.

Fig. 4 is the enlarged drawing in the portion B in Fig. 1.

In figure: 1, outer cylinder；101, cylinder；102, the first plug；1021, the first sealing；1022, the second sealing； 103, the second plug；2, inner cylinder；21, stomata；22, damping hole；3, floating plug；4, piston shaft；5, piston；6, pedestal；61, annular Slot；62, connecting hole；7, pneumatic head；71, seal；72, extension；73, air drain；74, gas distribution channel；75, elastic ring；8, it seals Blocking piece；9, the first oil sealing；10, the second oil sealing；11, third oil sealing；12, bushing；13, circlip；100, air cavity；200, oil pocket； 300, mounting hole；400, oil transportation hole.

Specific embodiment

Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that this is practical new Type will be full and complete, and the design of example embodiment is comprehensively communicated to those skilled in the art.It is identical in figure Appended drawing reference indicates same or similar structure, thus the detailed description that will omit them.

Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will As the component in "lower".When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures On, or refer to that certain structure is " direct " and be arranged in other structures, or refer to that certain structure is arranged by the way that another structure is " indirect " in other knots On structure.

Term "one", " one ", "the" and " described " to indicate there are one or more elements/component part/etc.；With Language " comprising " and " having " is to indicate the open meaning being included and refer to element/composition portion in addition to listing Also may be present except divide/waiting other element/component part/etc.；Term " first ", " second " etc. are only used as label, no It is the quantity limitation to its object.

A kind of damping shock absorber is provided in disclosure example embodiment, which can be used for elevator, automobile Suspension system, but not limited to this, it may also be used for other equipment for needing damping such as undercarriage are no longer arranging one by one It lifts.

As depicted in figs. 1 and 2, the damping shock absorber of this example embodiment may include outer cylinder 1, inner cylinder 2, floating plug 3, live Fill in axis 4 and piston 5, in which:

Outer cylinder 1 can have Packed top end part and bottom end.

Inner cylinder 2 is set in outer cylinder 1 along the axial direction of outer cylinder 1, and is had a first end and a second end, and first end and top end part seal Cooperation, second end extend to bottom end；The side wall of inner cylinder 2 is equipped with airflow channel and multiple damp channels, each equal position of damp channel In airflow channel close to the side of bottom end, and axially spaced distribution.

Floating plug 3 is slideably sheathed on outside inner cylinder 2, and is cooperated simultaneously with inner cylinder 2 and the sealing of outer cylinder 1, at floating plug 3 and bottom The oil pocket 200 that can accommodate hydraulic oil is formed between end, and the air cavity 100 that can accommodate gas is formed between floating plug 3 and top end part；Air-flow Channel is connected to air cavity 100 and inner cylinder 2, and each damp channel is connected to oil pocket 200 and inner cylinder 2.

Piston shaft 4 is slidably disposed through top end part setting, and penetrates inner cylinder 2, and seals and cooperate with the top end part.

Piston 5, which seals slidingly against, to be matched in inner cylinder 2, and is connect with piston shaft 4；First position is slid into piston 5 When, piston 5 covers or exposes airflow channel, and exposes each damp channel, and when piston 5 slides into the second position, piston 5 is at least A part in each damp channel is covered, and exposes airflow channel.

The damping shock absorber of disclosure embodiment uses spring to realize buffering, but uses damping logical due to avoiding Road and hydraulic oil realize buffering, are conducive to improve service life, reduce weight and occupied space.It can gradually be blocked by piston 5 Damp channel gradually changes hydraulic oil to the damping of piston 5, keeps the movement of piston 5 gentler, to improve shock absorbing process Stationarity.

As depicted in figs. 1 and 2, outer cylinder 1 can be the hollow structure with top end part and bottom end, top end part and bottom end It is sealing structure, and is formed with cavity between top end part and bottom end.

In one embodiment, as shown in Figure 1, outer cylinder 1 may include cylinder 101, the first plug 102 and the second plug 103, cavity can be formed in cylinder 101 by the first plug 102 and the second plug 103.Piston shaft 4 can penetrate cylinder 101 Top end part can simultaneously be slided along axial reciprocating, and remain sealing state, prevent hydraulic fluid leak；Wherein:

Cylinder 101 can be the tubular structure of both ends perforation, and have bottom end and top, the shape of the cross section of cylinder 101 Shape can be circle, and but not limited to this, can also ellipse or polygon etc..

First plug 102 is sealably coupled in 101 one end of cylinder, and to form the top end part of outer cylinder 1, the first plug 102 can Equipped with the axis hole fitted through for piston shaft 4, piston shaft 4 is slidably disposed through the axis hole, to pass through the first plug 102.

As shown in figure 3, in one embodiment, the first plug 102 may include the first sealing 1021 and the second sealing 1022, wherein the first sealing 1021 can be column structure, salable to be matched in cylinder 101, for example, the first sealing 1021 periphery is equipped with one or more annular seal grooves, can be equipped with the first oil sealing 9, first oil sealing 9 in the annular seal groove Can seal and cooperate with the inner wall of cylinder 101, the first oil sealing 9 can for outside framework oil seal etc., thus realize the first sealing 1021 with The sealed connection of cylinder 101.First sealing 1021 can be resisted against inner cylinder 2 close to one end of 1 top end part of outer cylinder.Meanwhile second Sealing 1022 can be column structure, salable to be matched in inner cylinder 2, and connect with the first sealing 1021, for example, second The periphery of sealing 1022 is equipped with one or more annular seal grooves, can be equipped with the second oil sealing 10 in the annular seal groove, this Two oil sealings 10 can be sealed with the inner wall of inner cylinder 2 to be cooperated, which can be outside framework oil seal etc., to realize the second sealing 1022 with the sealed connection of inner cylinder 2.In addition, the first sealing 1021 and the second sealing 1022 can be integrally formed connection.First The axis hole of plug 102 can be for through the through-hole of the first sealing 1021 and the second sealing 1022.

As shown in figure 4, the second plug 103 can be column structure, and in the salable bottom end for being matched with cylinder 101, with Form the bottom end of outer cylinder 1.

In the other embodiment of the disclosure, outer cylinder 1 can also be other structures, for example, cylinder 101 can be one end The open integral type tubular structure of the other end is closed, bottom end closing, top end part is open, can be from installing second in bottom end Plug 103 will not enumerate the other structures of outer cylinder 1 herein.

As depicted in figs. 1 and 2, inner cylinder 2 can be the tubular structure of both ends perforation, and have a first end and a second end.Inner cylinder 2 Outer diameter be less than outer cylinder 1 internal diameter, inner cylinder 2 can along the axial direction of outer cylinder 1 be set to outer cylinder 1 in, the first end of inner cylinder 2 can be with top end part Sealing cooperation, for example, the first end of inner cylinder 2 can be sheathed on outside the second sealing 1022 of the first plug 102, and the company of sealing It connects.

The second end of inner cylinder 2 can extend to the bottom end of outer cylinder 1, in one embodiment, as shown in figure 4, inner cylinder 2 Oil duct can be formed between second end and bottom end, which can connect 1 inside of inner/outer tube and the space between outer cylinder 1 and inner cylinder 2 It is logical.In one embodiment, the damping shock absorber of the disclosure may also include pedestal 6, and pedestal 6 can cooperate in outer cylinder 1, and with The bottom end of outer cylinder 1 connects, the second end of inner cylinder 2 can contact cooperate in pedestal 6 and being sealed with pedestal 6；Oil duct can be set to pedestal 6 It is interior, and the space being connected in inner cylinder 2 and the space between inner cylinder 2 and outer cylinder 1, i.e. connection inner cylinder 2 and oil pocket 200.For example, Pedestal 6 can be ring structure, and the periphery of pedestal 6 can match with outer cylinder 1, the second end of inner cylinder 2 can contact in pedestal 6, and with bottom The space connection that seat 6 surrounds；The inner edge of end face of the pedestal 6 far from inner cylinder 2 can be equipped with annular groove 61, and pedestal 6 is close to inner cylinder 2 End face can be equipped with connecting hole 62, and connecting hole 62 can be connected to annular groove 61 and oil pocket 200, and connecting hole 62 and annular groove 61 are formed logical Road is above-mentioned oil duct.

Certainly, oil duct is also possible to other structures, for example, oil duct can gap between inner cylinder 2 and the bottom end of outer cylinder 1, In This will not enumerate, as long as can be connected to the inner space of inner cylinder 2 with oil pocket 200.Alternatively, the second end of inner cylinder 2 It can directly seal and cooperate with the bottom end of outer cylinder 1, without being connected to by oil duct.

The side wall of inner cylinder 2 can be equipped with airflow channel and multiple damp channels, and it is close that each damp channel is respectively positioned on airflow channel The side of the bottom end of outer cylinder 1, and each damp channel is distributed along the axially spaced-apart of inner cylinder 2.

As depicted in figs. 1 and 2, the quantity of airflow channel can be one, and airflow channel may include stomata 21, stomata 21 Quantity can be to be multiple, and be distributed in a ring, each stomata 21 can will be between the inner space of inner cylinder 2 and inner cylinder 2 and outer cylinder 1 Space connection is got up, i.e. connection inner cylinder 2 and air cavity 100.The shape of stomata 21 can be round, rectangle or other shapes, herein Do not do particular determination.Certainly, the quantity of the stomata 21 of airflow channel is also possible to one, and the quantity of airflow channel is also possible to more A, multiple airflow channels can be axially distributed, and is respectively positioned on damp channel close to the side of the top end part of outer cylinder 1.At 5, piston When first position, piston 5 covers simultaneously or exposes each airflow channel.

Each damp channel includes damping hole 22, and the quantity of the damping hole 22 of each damp channel can be multiple, and The damping hole 22 of each damp channel can be distributed in a ring, and the quantity of the damping hole 22 of each damp channel can be identical, such as often The damping hole 22 of a damp channel is four.Each damping hole 22 can be by the inner space of inner cylinder 2 and inner cylinder 2 and outer cylinder 1 Between space connection get up, i.e. connection inner cylinder 2 and oil pocket 200.The shape of damping hole 22 can be round, rectangle or other shapes Shape does not do particular determination herein.Certainly, the quantity of the damping hole 22 of each damp channel is also possible to one.

As depicted in figs. 1 and 2, floating plug 3 is slideably sheathed on outside inner cylinder 2, and is matched simultaneously with outer cylinder 1 and the sealing of inner cylinder 2 It closes, the space between outer cylinder 1 and inner cylinder 2 is separated by floating plug 3, which is air cavity 100 close to the region of top end part, close to bottom end The region in portion is oil pocket 200.Gas can be accommodated in air cavity 100, which can be the inert gases such as helium, be also possible to nitrogen Gas or other non-combustible or nonflammable gas, can accommodate hydraulic oil in oil pocket 200, hydraulic oil can be silicone oil, castor oil, Machine oil etc..The airflow channel of inner cylinder 2 can be connected to air cavity 100 and inner cylinder 2, and each damp channel of inner cylinder 2 is connected to oil pocket 200 and interior Cylinder 2.

For example, floating plug 3 can be column structure, and with the through-hole that a both ends penetrate through, inner cylinder 2 can fit through this Through-hole, the inner circumferential of floating plug 3 can be equipped with one or more inner grooves, can be equipped with inner seal ring in each inner groove, each inner seal ring can With the outer wall of inner cylinder 2 sealing cooperation and slidably.Meanwhile the periphery of floating plug 3 can be equipped with one or more outer grooves, each outer ring It is equipped with exterior seal ring in slot, the inner wall sealing cooperation of each exterior seal ring and outer cylinder 1 and slidably.It certainly, can also be by other Mode makes floating plug 3 seal slidingly against cooperation with outer cylinder 1 and inner cylinder 2 simultaneously, and this will not be detailed here.

As depicted in figs. 1 and 2, piston shaft 4 can be column structure, penetrate outer cylinder 1 by the top end part of outer cylinder 1, and can slide Top end part is passed through dynamicly to be arranged, and penetrates inner cylinder 2, and the outer diameter of piston shaft 4 is less than the internal diameter of inner cylinder 2.For example: piston shaft 4 One end can fit through the axis hole of the first plug 102, to pass through the first plug 102, and penetrate inner cylinder 2.Meanwhile axis hole It is interior that oil sealing can be also equipped in axis hole equipped with the bushing 12 passed through for piston shaft 4, it can be close by piston shaft 4 and axis hole by oil sealing Envelope cooperation.

In one embodiment, ring packing is also provided in the first sealing 1021 and/or the second sealing 1022 Slot in the annular seal groove, can be equipped with third oil sealing 11, and third oil sealing 11 can be slidingly sealed cooperation with the periphery of piston shaft 4. In addition, can be equipped with the bushing 12 passed through for piston shaft 4 in the axis hole of the first plug 102, the inner wall of cylinder 101 is connected with annular Circlip 13, the first sealing 1021 have step, which can be connected to circlip 13 close to the surface of inner cylinder 2, third oil sealing 11 Between the step and bushing 12, bushing 12 fits through the circlip 13.

As depicted in figs. 1 and 2, piston 5 can be column structure, can be set in inner cylinder 2, and connect with piston shaft 4, example Such as, it can be connected by modes such as welding, clamping or threaded connections, it is, of course, also possible to be integral structure.Meanwhile piston 5 can be with Inner cylinder 2 is slidingly sealed cooperation, for example, the periphery of piston 5 can be equipped with one or more annular grooves, can be equipped in each annular groove with it is interior The sealing ring of cylinder 2 inner walls sealing cooperation.The inner space of inner cylinder 2 can be separated by piston 5.

In one embodiment, when piston 5 slides into first position, which can be the first plug of contact 102 The second sealing 1022 position, at this point, piston 5 can expose or cover the airflow channel of inner cylinder 2, and it is logical to expose each damping Road；When piston 5 slides into the second position, which can hold level with both hands with inner cylinder 2 close to the one of the second plug 103 for piston 5 Airflow channel at this point, piston 5 covers each damp channel simultaneously, and is exposed, and the oil duct of pedestal 6 also keeps being connected in neat position.

In another embodiment, the damping shock absorber of the disclosure also may not include pedestal 6 and its oil duct, and the of inner cylinder 2 Two ends, which are directly sealed with the bottom end of outer cylinder 1, to be cooperated.In the case, due to the oil duct of not no normal open, and the decrement of liquid It can be ignored, so that the process that piston 5 covers damp channel one by one can stop before covering the last one damp channel, at this time Position can be used as the second position.

As shown in figure 3, first plug 102 can be equipped with mounting hole 300, mounting hole for the ease of inflating into air cavity 100 300 can penetrate through the first plug 102, and be connected to air cavity 100, meanwhile, the damping shock absorber of disclosure embodiment can also wrap Pneumatic head 7 is included, pneumatic head 7 can be set in mounting hole 300, and gas can be inputted into air cavity 100, and pneumatic head 7 can be check valve Or other unidirectional inflation devices.For example: pneumatic head 7 may include seal 71, extension 72, air drain 73, gas distribution channel 74 With elastic ring 75, in which:

Seal 71 can be set in mounting hole 300, and can be cooperated by sealing ring and the sealing of mounting hole 300.Extension 72 Seal 71 be may connect to close to the side of air cavity 100, and between having between the periphery of extension 72 and the inner wall of mounting hole 300 Gap.Meanwhile air drain 73 can be set to the periphery of extension 72, and can in a ring, and air drain 73 can be V-groove, the i.e. cross of air drain 73 Section can be V-arrangement.

Gas distribution channel 74 can have the both ends of connection, and one end is located at the seal 71, and is in communication with the outside, the other end It is connected in extension 72, and with the bottom of air drain 73.For example, gas distribution channel 74 can be by orthogonal two hole sections Connection is formed.

Elastic ring 75 can be set in air drain 73, and cover gas distribution channel 74, and elastic ring 75 can be jacked up by gas, so that gas transmission Channel 74 is connected to mounting hole 300.

Exemplary illustration passes through the principle that the first plug 102 is inflated below:

When inputting gas into air cavity 100, a gas source can be connected to the gas distribution channel 74 of seal 71, gas can Elastic ring 75 is opened, and is entered in air cavity 100 by the gap of extension 72 and 300 inner wall of mounting hole, so as into air cavity 100 Input gas.When inputting gas not into air cavity 100, elastic ring 75 can cover gas distribution channel 74, and gas distribution channel 74 can not lead to It crosses air drain 73 to be connected to air cavity 100, to prevent the gas in air cavity 100 from leaking out, plays the role of one-way non-return.

As shown in figure 4, second plug 103 can be equipped with oil transportation hole 400, defeated for the ease of being filled with hydraulic oil into oil pocket 200 400 one end of oilhole is connected to oil pocket 200, and the other end is in communication with the outside.The damping shock absorber of disclosure embodiment can also wrap Closeouts 8 are included, closeouts 8 are removably plugged in oil transportation hole 400.When being filled with hydraulic oil into oil pocket 200, can will block Part 8 takes out, and injects hydraulic oil into oil pocket 200 by oil transportation hole 400；When in use, closeouts 8 can be plugged in oil transportation hole In 400, hydraulic fluid leak is prevented.

Below with reference to an embodiment of the disclosure, the working principle of the damping shock absorber of the disclosure is illustrated:

In the case where piston shaft 4 is not pressurized, piston 5 can be located at first position, at this point, the masking of piston 5 or exposing air-flow Channel, and expose each damp channel；Since each damp channel is connected to oil pocket 200 and inner cylinder 2, and the oil duct of pedestal 6 is connected to oil pocket 200 and inner cylinder 2, so that accommodating hydraulic oil in inner cylinder 2 and in oil pocket 200.It is moved when piston shaft 4 is pressurized into outer cylinder 1 When, i.e., when mobile to the second position, the hydraulic oil in inner cylinder 2 can be squeezed with piston 5, makes the hydraulic oil in inner cylinder 2 through damping Channel is discharged to oil pocket 200；With the movement of piston 5, damp channel can be blocked one by one, until whole damp channels is blocked, But oil duct remains connection.In the process, the damp channel that can be discharged for hydraulic oil gradually decreases, so that hydraulic oil is to work The damping action of plug 5 is gradually increased, to play buffering, the effect of damping to piston 5.At the same time, oil pocket 200 is hydraulic Oil increases, and keeps floating plug 3 mobile to the top end part of outer cylinder 1, and floating plug 3 can pass through the gas in air cavity 100 in airflow channel indentation It is located at piston 5 in cylinder 2 close to the space of the top end part, to guarantee the smooth movement of piston 5.

When 4 pressure of piston shaft releases, the gas in inner cylinder 2 can return to air cavity 100 and floating plug 3 pushed reversely to move It is dynamic, the hydraulic oil in oil pocket 200 is squeezed by oil duct into inner cylinder 2, to make piston 5 move backward, i.e., by the second position Mobile to first position, in the process, piston 5 exposes shielded damp channel one by one, until returning to first position, exposes Whole damp channels, to realize the reset of piston 5 and piston shaft 4.

Those skilled in the art will readily occur to the disclosure after considering specification and practicing utility model disclosed herein Other embodiments.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications are used Way or adaptive change follow the general principles of this disclosure and including the disclosure it is undocumented in the art known in Common sense or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by institute Attached claim is pointed out.

Claims

1. a kind of damping shock absorber characterized by comprising

Outer cylinder has Packed top end part and bottom end；

Inner cylinder, the axial direction along the outer cylinder are set in the outer cylinder, and have a first end and a second end, the first end with it is described Top end part sealing cooperation, the second end extend to the bottom end；The side wall of the inner cylinder is equipped with airflow channel and multiple resistances Buddhist nun channel, each damp channel is respectively positioned on the airflow channel close to the side of the bottom end, and axially spaced distribution；

Floating plug is slideably sheathed on outside the inner cylinder, and is cooperated simultaneously with the inner cylinder and outer cylinder sealing, described The oil pocket that can accommodate hydraulic oil is formed between floating plug and the bottom end, gas can be accommodated by being formed between the floating plug and the top end part The air cavity of body；The airflow channel is connected to the air cavity and the inner cylinder, and each damp channel is connected to the oil pocket and institute State inner cylinder；

Piston shaft is slidably disposed through the top end part setting, and penetrates the inner cylinder, and seal and cooperate with the top end part；

Piston is sealed slidingly against and is matched in the inner cylinder, and with the piston axis connection；First is slid into the piston When position, piston masking or expose the airflow channel, and expose each damp channel, slides into the in the piston When two positions, the piston at least covers a part in each damp channel, and exposes the airflow channel.

2. damping shock absorber according to claim 1, which is characterized in that the airflow channel includes the gas of multiple annular spreads Hole；And/or

Each damp channel includes the damping hole of multiple annular spreads.

3. damping shock absorber according to claim 1, which is characterized in that shape between the second end of the inner cylinder and the bottom end At the oil duct having inside and outside connection inner cylinder, when the piston slides into the second position, the piston covers each damp channel, And expose the airflow channel and the oil duct.

4. damping shock absorber according to claim 3, which is characterized in that the damping shock absorber further include:

Pedestal, cooperation is set in the outer cylinder, and is connect with the bottom end, and the second end contact of the inner cylinder is in the pedestal And it seals and cooperates with the pedestal；The oil duct is set to the pedestal, and is connected to the inner cylinder and the oil pocket.

5. damping shock absorber according to claim 4, which is characterized in that the pedestal is ring structure, the pedestal it is outer All to match with the outer cylinder, the second end contact of the inner cylinder is in the pedestal and the space that surrounds with the pedestal is connected to；Institute The inner edge for stating end face of the pedestal far from the inner cylinder is equipped with annular groove, and the pedestal is equipped with connection close to the end face of the inner cylinder Hole, the connecting hole is connected to the annular groove and the oil pocket, to form the oil duct.

6. any one of -5 damping shock absorber according to claim 1, which is characterized in that the outer cylinder includes:

Cylinder；

First plug is sealedly attached to described cylinder one end, and to form the top end part, the piston shaft is slidably disposed through institute State the first plug；

7. damping shock absorber according to claim 6, which is characterized in that first plug includes:

First sealing, sealing are matched in the cylinder, and are resisted against the inner cylinder close to one end towards the top end part；

The piston shaft is slidably disposed through first sealing and second sealing, and at least seals with described first The sealing cooperation of one of portion and second sealing.

8. damping shock absorber according to claim 6, which is characterized in that first plug is equipped with and is connected to the air cavity Mounting hole, the damping shock absorber further include:

9. damping shock absorber according to claim 8, which is characterized in that the pneumatic head includes:

Seal, sealing are matched in the mounting hole；

Extension is connected to the bottom end close to the side of the air cavity, and has gap between the inner wall of the hole installing；

Gas distribution channel, one end is located at the seal, and is in communication with the outside, and the other end extends to the extension, and with it is described The connection of air drain bottom；

Elastic ring is set in the air drain and covers the gas distribution channel, and the elastic ring can be jacked up by gas, so that described defeated Gas channel is connected to the mounting hole.

10. damping shock absorber according to claim 6, which is characterized in that second plug is equipped with and is connected to the oil pocket Oil transportation hole, the damping shock absorber further include:

Closeouts removably block the oil transportation hole.