CN208331099U - Damper - Google Patents

Abstract

The disclosure is to provide a kind of damper, is related to cushion technique field.The damper of the disclosure includes that cylinder barrel, piston shaft, piston and floating plug, cylinder barrel have oil pocket, and oil pocket accommodates hydraulic oil.Piston shaft is slideably arranged in cylinder barrel one end, and piston shaft is the hollow structure with closed end and open end, and open end is located in oil pocket.Piston, which is set in oil pocket and seals with the side walls of oil pocket, to be cooperated, oil pocket is divided into the first cavity and the second cavity, piston and piston axis connection simultaneously expose open end, piston is equipped with damp channel, when piston reciprocating is mobile, hydraulic oil can be circulated between the first cavity and the second cavity by damp channel.Floating plug is set in piston shaft and is slidingly sealed cooperation with the inner wall of piston shaft, to form air cavity between floating plug and closed end, accommodates compressed gas in air cavity.

Description

Damper

Technical field

This disclosure relates to cushion technique field, in particular to a kind of damper.

Background technique

Currently, the suspension system of automobile is generally fitted with damper, with the vibration in vehicle traveling process of decaying, guarantee Traveling is smooth.Wherein, hydraulic damper using relatively broad.Existing hydraulic damper includes cylinder body, piston, floating ring, work Stopper rod etc., piston and floating ring can be set in cylinder body along axial, and cylinder body can be divided into oil pocket and air cavity by floating ring, and piston is located at oil pocket It is interior；There is hydraulic oil in oil pocket, has gas in air cavity；Piston has valve opening and can move back and forth in cylinder body, with the shifting of piston Dynamic, hydraulic oil can flow through valve opening, play buffering effect by damping action of the valve opening to hydraulic oil.Meanwhile piston rod is reciprocal Movement can be such that floating ring moves back and forth.

But the mobile range of the stroke of existing damper, i.e. piston and piston rod, the limit by cylinder body length System, cylinder body length is bigger, and stroke is longer, and cylinder body length is smaller, and stroke is shorter.It is existing thus under the premise of meeting range demands There is the cylinder body length of damper larger, cause weight larger and need biggish accommodation space, is unfavorable for installing.

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 damper, can reduce entire length under the premise of not reducing stroke, To reduce weight and occupied space, to install.

According to one aspect of the disclosure, a kind of damper is provided, comprising:

Cylinder barrel, has oil pocket, and the oil pocket accommodates hydraulic oil；

Piston shaft is slideably arranged in described cylinder barrel one end, and the piston shaft is with closed end and open end Hollow structure, the open end are located in the oil pocket；

Piston, seals in the oil pocket and with the side walls of the oil pocket and cooperates, and the oil pocket is divided into the One cavity and the second cavity, the piston and the piston axis connection simultaneously expose the open end, and it is logical that the piston is equipped with damping Road, when the piston reciprocating is mobile, hydraulic oil can be by the damp channel in first cavity and second cavity Between circulate；

Floating plug is slidingly sealed cooperation in the piston shaft and with the inner wall of the piston shaft, in the floating plug and Air cavity is formed between the closed end, accommodates gas in the air cavity.

In a kind of exemplary embodiment of the disclosure, the piston shaft includes:

Axis body has the both ends of perforation, and one end is the open end；

Gas-charging connection, sealing are matched with the other end of the axis body, and to form the closed end, and the gas-charging connection is used It is inflated in the air cavity.

In a kind of exemplary embodiment of the disclosure, the gas-charging connection includes sealing, and the sealing periphery is set The first seal groove, the first air drain, the second seal groove and second the second air drain of air drain that the oriented open end is sequentially distributed, it is described Second air drain is connected to the air cavity；

First air drain bottom is equipped with the first connecting hole, is equipped in the sealing and is connected to first connecting hole and institute State the air inlet outside axis body, second air drain bottom is equipped with the second connecting hole, is equipped in the sealing and is connected to described the The gas port of one air drain and second connecting hole；

The sealing ring with axis body inner wall sealing cooperation is equipped in first seal groove and second seal groove； The first elastic ring for covering first connecting hole is equipped in first air drain, and first elastic ring can be by air-flow top It rises, so that the air inlet is connected to first air drain；It is equipped in second air drain and covers the of second connecting hole Two elastic rings, and second elastic ring can be jacked up by air-flow, so that the gas port is connected to the air cavity.

In a kind of exemplary embodiment of the disclosure, the sealing close to the open end end face be equipped with it is described The via hole of gas port perforation, the aperture of the via hole are not less than the aperture of the gas port, and are equipped with sealing in the via hole and match The filling member of conjunction.

In a kind of exemplary embodiment of the disclosure, the bottom of the bottom of first air drain and/or second air drain Portion is V-arrangement.

In a kind of exemplary embodiment of the disclosure, the gas-charging connection further include:

Interconnecting piece, it is outer and connect with the sealing to be set to the axis body, the air inlet perforation interconnecting piece and with External world's connection.

In a kind of exemplary embodiment of the disclosure, the damp channel includes mutually independent first subchannel and Two subchannels, in which:

First subchannel includes first annular slot and the first damping hole, and the first annular slot is set to outside the piston The connection of first cavity described in Zhou Bingyu；First damping hole is set in the piston, and one end of first damping hole connects Second cavity is passed through, the other end is connected to the bottom of the first annular slot, is equipped with shelter in the first annular slot The first elastic ring of the first damping hole is stated, and the periphery of first elastic ring is not contacted with the oil pocket side wall；

Second subchannel includes the second annular groove and the second damping hole, and second annular groove is set to outside the piston Week and it is located at the first annular slot close to the side of second cavity, second annular groove and second cavity connect It is logical；Second damping hole is set in the piston, and second damping hole one end is connected to first cavity, the other end It is connected to the bottom of second annular groove, the second elasticity for covering second damping hole is equipped in second annular groove Circle, the periphery of second elastic ring is not contacted with the oil pocket side wall.

In a kind of exemplary embodiment of the disclosure, the bottom of the first annular slot and/or the bottom of the second annular groove Portion is V-arrangement.

In a kind of exemplary embodiment of the disclosure, the quantity of first damping hole and second damping hole is It is multiple.

In a kind of exemplary embodiment of the disclosure, the piston is equipped with piston seal slot, the piston seal slot It is equipped between the first annular slot and second annular groove, and in the piston seal slot close with the oil pocket side wall Seal the sealing ring of cooperation.

In a kind of exemplary embodiment of the disclosure, the floating plug is equipped with bleeder port, is equipped with and blocks in the bleeder port Part, the closeouts are removably tightly connected with the bleeder port.

In a kind of exemplary embodiment of the disclosure, the open end, which is removably connected with, can stop the floating plug to be deviate from Stop part.

In a kind of exemplary embodiment of the disclosure, spring is equipped in the air cavity, the spring one end is resisted against institute Closed end is stated, the other end is resisted against the floating plug, and when the floating plug is mobile to the closed end, the spring is in compression State.

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

Cylinder has the both ends of perforation；

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

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

The damper of the disclosure can drive the second chamber of piston press intracorporal hydraulic when piston shaft is pressed towards in cylinder barrel Oil makes the intracorporal hydraulic oil of the second chamber enter the first cavity through damp channel, by damp channel to the damping action of hydraulic oil Play buffering, the effect of damping.It, can be intracorporal by the second chamber meanwhile as the volume that piston shaft enters in oil pocket is gradually increased Hydraulic oil is pressed into piston shaft by the open end of piston shaft, and pushes floating plug mobile to the closed end of piston shaft, to compress air cavity Interior gas simultaneously reduces air cavity, to guarantee that piston shaft is smoothly moved into cylinder barrel.When the pressure disappears, the gas in air cavity Floating plug can be pushed to move backward, the hydraulic oil in piston shaft be extruded, and push the intracorporal hydraulic oil of the first chamber of piston press, made The intracorporal hydraulic oil of first chamber is flowed through damp channel into the second cavity, so as to move backward piston and piston shaft, with Just it resets.

In above process, can by movement of the floating plug in piston shaft be piston shaft indentation concede space, avoid for Increase the stroke of piston shaft and increase the length of cylinder barrel, cylinder barrel length can be reduced, to drop under the premise of guaranteeing that stroke is constant The weight and occupied space of low damper, are easily installed.

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 compressed schematic diagram of disclosure example embodiment damper.

Fig. 2 is the un-compressed schematic diagram of disclosure example embodiment damper.

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.

Fig. 5 is the enlarged drawing in the portion C in Fig. 2.

Fig. 6 is the schematic diagram of the gas-charging connection of the piston shaft of disclosure example embodiment damper.

Fig. 7 is the schematic diagram of the floating plug of disclosure example embodiment damper.

Fig. 8 is the schematic diagram of the piston of disclosure example embodiment damper.

In figure: 1, cylinder barrel；101, cylinder；102, the first plug；103, the second plug；111, oil pocket；1111, the first chamber Body；1112, the second cavity；2, piston shaft；21, axis body；22, gas-charging connection；221, sealing；2211, the first seal groove； 2212, the second seal groove；2213, the first air drain；2214, the second air drain；2215, the first connecting hole；2216, the second connecting hole； 2217, air inlet；2218, gas port；2219, via hole；222, interconnecting piece；201, air cavity；3, floating plug；4, piston；401, center Hole；41, piston seal slot；42, the first subchannel；421, first annular slot；422, the first damping hole；43, the second subchannel； 431, the second annular groove；432, the second damping hole；5, sealing ring；6, the first elastic ring；7, the second elastic ring；8, filling member；9, Closeouts；10, stop part；11, sealing ring；12, the first elastic ring；13, the second elastic ring；14, oil sealing；15, end cap；16, it serves as a contrast Set；17, spring.

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 damper is provided in disclosure example embodiment, which can be used for the suspension system of automobile, but It is not limited, it may also be used for other equipment for needing damping such as undercarriage will not enumerate.

As shown in Figure 1, the damper of this example embodiment may include cylinder barrel 1, piston shaft 2, floating plug 3 and piston 4.

As shown in Fig. 2, in this example embodiment, cylinder barrel 1 may include that cylinder 101, the first plug 102 and second are stifled First 103, in which:

Cylinder 101 can be the tubular structure of both ends perforation, and one end is top end part, and the other end is bottom end.Cylinder 101 The shape of cross section can be circle, and but not limited to this, can also ellipse or polygon etc..

As shown in figure 4, one end of the first plug 102 can protrude into the top end part of cylinder 101, and pass through sealing rubber ring and top Portion is tightly connected, it is of course also possible to use other way is tightly connected；The other end of first plug 102 is located at outside cylinder 101, And it is crimped on the top end part.First plug 102 can be equipped with the axis hole fitted through for piston shaft 2, and the first plug 102 is located at The end face of one end outside cylinder 101 is equipped with the groove around above-mentioned axis hole, can be equipped with oil sealing 14 in the groove, and can in groove It the modes such as is connected through a screw thread or is interference fitted and fix an end cap 15, to compress oil sealing 14, meanwhile, the first plug 102 is located at top The bushing 16 passed through for piston shaft 2 can be also equipped in one end in end.In addition, 102 periphery of the first plug can be equipped with card slot, After the sealing of first plug 102 is matched with top end part, the edge of top end part can be made to card slot inner bending, so that it is stifled to limit first First 102 position can also be used other way for the first plug 102 and be fixed on top end part, will not enumerate herein certainly. In addition, the first plug 102 can be connected through a screw thread with cylinder 101, circlip is connect or the connection types such as rolling realize edge sealing.

As shown in Fig. 2, the second plug 103 is securable in the bottom end of cylinder 101, and sealing rubber ring and the bottom can be passed through End part seal connection, so that the bottom end be closed.So as to pass through the first plug 102 and the second plug 103 in cylinder 101 Form an oil pocket 111, hydraulic oil can be accommodated in oil pocket 111, but not necessarily be full of hydraulic oil, the hydraulic oil can be silicone oil, Castor oil, machine oil etc., will not enumerate herein.Piston shaft 2 can penetrate cylinder 101 and can slide axially, and remain close Envelope state, prevents hydraulic fluid leak.In addition, the second plug 103 can also be connected through a screw thread with cylinder 101, circlip is connect or is rolled The connection types such as side realize edge sealing.

In the other examples embodiment of the disclosure, cylinder barrel 1 can also be other structures, for example, cylinder 101 can be Closed at one end, the open integral type tubular structure of the other end, bottom end closing, top end part is open, can be from pacifying in bottom end Fill the second plug 103.Certainly, cylinder barrel 1 can also be other structures, if its internal oil pocket 111 with receiving hydraulic oil, and its Top end part can slideably be penetrated for piston shaft 2.

As depicted in figs. 1 and 2, in this example embodiment, piston shaft 2 can be tubulose, i.e. hollow structure, and have envelope Closed end and open end.Piston shaft 2 can penetrate cylinder barrel 1, and energy axial reciprocating sliding, and open end is located in cylinder barrel 1.It is specific and Speech, piston shaft 2 may include axis body 21 and gas-charging connection 22, in which:

Axis body 21 can be the tubular structure of both ends perforation, and the shape of cross section can be with the axis hole phase of the first plug 102 Matching, concrete shape do not do particular determination herein, for example, the cross section of axis body 21 and axis hole may each be round.Axis body 21 One end can fit through the axis hole of the first plug 102, and penetrate in oil pocket 111, and the one end being located in oil pocket 111 is above-mentioned The open end of piston shaft 2, the open end are connected to oil pocket 111, so that the hydraulic oil in oil pocket 111 can enter axis by the open end In body 21.Meanwhile axis body 21 also extends through oil sealing 14, end cap 15 and bushing 16, can prevent oil leak by oil sealing 14, pass through bushing 16 The abrasion of the first plug 102 and axis body 21 can be reduced.

As shown in Figure 3 and Figure 4, salable one end for being matched with axis body 21 and being located at outside cylinder barrel 1 of gas-charging connection 22, to be formed Gas-charging connection 22 can be connect, to inflate into piston shaft 2 by the closed end of piston shaft 2 with a gas source.Specifically, inflation connects First 22 may include sealing 221 and interconnecting piece 222, in which:

It is located in one end outside cylinder barrel 1 as shown in figure 4, sealing 221 can be set to axis body 21, and the periphery of sealing 221 It can be equipped with the first seal groove 2211 and the second seal groove 2212, the first seal groove 2211 and the second seal groove 2212 can be in ring Shape, and its cross section may each be V-arrangement, rectangle or trapezoidal etc..It is close that second seal groove 2212 can be located at the first seal groove 2211 The side of 101 bottom end of cylinder.Meanwhile first can be equipped with sealing ring 5 in seal groove 2211 and the second seal groove 2212, it is close The material of seal ring 5 can be rubber elastomeric material, and the periphery of each sealing ring 5 is contacted with the inner wall of axis body 21, to make The inner wall of sealing 221 and axis body 21, which seals, to be cooperated, and the closed end of piston shaft 2 is formed.In addition, sealing 221 and axis body 21 can It is connected through a screw thread, circlip connects and the connection types such as rolling realize edge sealing.

As shown in figure 4, the periphery of sealing 221 can also be equipped with the first air drain 2213 and the second air drain 2214 can be in Ring-type, and its cross section may each be V-arrangement, rectangle or trapezoidal etc., or can also the bottom of only cross section be V-arrangement.First air drain 2213 can be between the first seal groove 2211 and the second seal groove 2212, and the second air drain 2214 can be located at the second seal groove 2212 Close to the side of 101 bottom end of cylinder, so that the first seal groove 2211, the first air drain 2213, the second seal groove 2212 and the Two air drains 2214 can be sequentially distributed axially towards the open end of piston shaft 2.Meanwhile second air drain 2214 close to open end side wall Outer rim be smaller than the outer rim of 2212 side wall of the second seal groove so that being connected to always inside the second air drain 2214 and axis body 21.Together When, the bottom of the first air drain 2213 can be equipped with the first connecting hole 2215, and 2214 bottom of the second air drain can be equipped with the second connecting hole 2216, the first connecting hole 2215 and the second connecting hole 2216 may each be the blind hole radially extended.It is sealed by sealing 221 After being matched in axis body 21, the pit of recessed first air drain 2213 can be formed, on axis body 21 to limit the position of sealing 221 It sets, it is of course also possible to which sealing 221 is fixed in axis body 21 will not enumerate otherwise herein.

As shown in figure 4, can also be equipped with air inlet 2217 and gas port 2218 in sealing 221, wherein air inlet 2217 can To be the blind hole extended along the direction for being parallel to 21 axis of axis body, one end can axis body 21 external connection, air inlet 2217 The other end can be connected to the first above-mentioned connecting hole 2215, so that the external world is connected to the first air drain 2213.Gas port 2218 one end can be the blind hole set on the first air drain 2213 on the side wall of 101 bottom end of cylinder, and gas port 2218 Can be connected to the second connecting hole 2216, so as to by gas port 2218 and the second connecting hole 2216 by the second air drain 2214 and the The connection of one air drain 2213.

As shown in figure 4, can also be equipped with the via hole 2219 penetrated through with above-mentioned gas port 2218, via hole 2219 in sealing 221 Aperture can be identical as the aperture of gas port 2218.It, can be by sealing since the space in the first air drain 2213 is limited 221 drill close to the end face of the open end of piston shaft 2, primary to form via hole 2219 and gas port 2218, and reduction opens up gas port 2218 difficulty.Filling member 8 can be also equipped in via hole 2219, filling member 8 can be a steel ball, interference fit can be used Mode seals in via hole 2219, can prevent air-flow from via hole 2219 directly being utilized to enter axis body 21 by the blocking of filling member 8 It is internal.The filling member 8 can also be the other structures such as columnar filler, the other ways such as can also be connected through a screw thread and block In in gas port 2218.Certainly, it can also be not provided with via hole 2219 in sealing 221, as long as air inlet 2217 can be opened up.

As shown in figure 3, being equipped with the first elastic ring 6 in the first air drain 2213, the inner circumferential of the first elastic ring 6 can cover the first company Hole 2215 is connect, the periphery of the first elastic ring 6 is without departing from the first air drain 2213, to not contact with the inner wall of axis body 21.Second gas Be equipped with the second elastic ring 7 in slot 2214, the inner circumferential of the second elastic ring 7 can cover the second connecting hole 2216, the second elastic ring 7 it is outer Edge is without departing from the second air drain 2214, to not contact with the inner wall of axis body 21.The material of first elastic ring 6 and the second elastic ring 7 It may each be rubber or other elastic materials, and can be deformed under the action of air-flow.

As shown in Figure 3 and Figure 4, interconnecting piece 222 can be set to outside axis body 21, and can be an integral structure with sealing 221, Air inlet 2217 may extend in interconnecting piece 222, and penetrate through interconnecting piece 222, to be in communication with the outside.Certainly, interconnecting piece 222 The individual components being connect with sealing 221 but by modes such as welding, clamping or threaded connections.

Exemplary illustration passes through the principle that gas-charging connection 22 is inflated below:

When being inflated by above-mentioned gas-charging connection 22 into axis body 21, a gas source can be connected to air inlet 2217, make gas Stream passes sequentially through air inlet 2217, the first connecting hole 2215, the first air drain 2213, gas port 2218,2216 and of the second connecting hole Second air drain 2214, inside axis body 21.In the process, although the first elastic ring 6 covers the first connecting hole 2215, the second elastic ring 7 covers the second connecting hole 2216, but the first elastic ring 6 can be covered the first connecting hole 2215 by air-flow Region jacks up, and opens the first connecting hole 2215, and to enter the first air drain 2213, the second elastic ring 7 can also be covered the by gas The region of two connecting holes 2216 jacks up, and opens the second connecting hole 2216, to enter the second air drain 2214, guarantees that gas is smooth Flowed into axis body 21.Simultaneously as the double cutting off inflow of the first elastic ring 6 and the second elastic ring 7, gas in axis body 21 without Method is flowed outwardly from gas-charging connection 22, can prevent gas leakage.Above-mentioned gas can be the inert gases such as helium, be also possible to nitrogen Or other non-combustible or nonflammable gas.

In the other examples embodiment of the disclosure, piston shaft 2 can also be that other structures, such as axis body 21 can be Integral type tubular structure with closed end and open end, closed end can be equipped with installing port that is openable or closing, gas-charging connection 22 are mountable to the installing port.It alternatively, piston shaft 2 can not also use the gas-charging connection 22, and only include one with closed end With the axis body 21 of open end, the inflating port that can be opened or closed can be equipped on axis body 21.Certainly, piston shaft 2 can also be Other structures will not enumerate herein.

As shown in figure 5 and figure 7, in this example embodiment, floating plug 3 can be column structure, and shape can be with piston The shape of 21 inner wall of axis body of axis 2 matches, and does not do particular determination herein, for example, the inner wall of axis body 21 is cylindrical surface, then floating plug 3 be cylindric.Floating plug 3 can cooperate in axis body 21, and the periphery of floating plug 3 can pass through the cushion rubber of elasticity and the inner wall of axis body 21 It is slidingly sealed cooperation, alternatively, the floating plug 3 of rubber elastomeric material can also be used, the periphery of floating plug 3 there can be multiple and axis body The bulge loop of 21 inner walls contact, so that the periphery of floating plug 3 can be slidingly sealed cooperation with axis body 21 always.It certainly, can also be by other The inner wall of floating plug 3 and axis body 21 is slidingly sealed cooperation by mode, will not enumerate herein.It as a result, can be in floating plug 3 and piston shaft An air cavity 201 is formed between 2 closed end, i.e., forms air cavity 201 between floating plug 3 and gas-charging connection 22, and air cavity 201 can be with The movement of floating plug 3 and reduce or expand, and gas can be accommodated in air cavity 201, and can be by gas-charging connection 22 into air cavity 201 Inflation in real time.3 side of floating plug can be located at by the hydraulic oil that the open end of piston shaft 2 enters axis body 21, the gas of air cavity 201 is located at The other side of floating plug 3 can prevent oil, gas mixing, be conducive to obstruct the gas and hydraulic oil of air cavity 201 by floating plug 3 Eliminate noise.

Floating plug 3 can be equipped with bleeder port, which can be through-hole, and closeouts 9, the closeouts can be equipped in bleeder port 9 can be a bolt, which can be threadedly coupled with bleeder port, and the bolt head of bolt is located in air cavity 201.In assembling, Floating plug 3 can be first passed through and squeeze hydraulic oil, to be connected to relief hole from the gas in bleeder port discharge hydraulic oil, then by bolt thread It is interior, relief hole is sealed.Meanwhile the eccentric setting of the bleeder port, that is, be located at 3 central axes of floating plug side, with prevent bolt and Floating plug 3 rotates synchronously, and guarantees the normal mounting of bolt.Certainly, closeouts 9 be also possible to can by clamping or with it is other can Disassembly mode is connected to the component in relief hole, as long as can removably seal with relief hole, will not enumerate herein.

In addition, the setting of one end in oil pocket 111 stop part 10, backstop can be located in the open end of piston shaft 2, i.e. axis body 21 Part 10 can be a pin, and axis body 21 can be equipped with pin hole, which can penetrate axis body 21, so that floating plug 3 be stopped to be deviate from, and not seal Stifled axis body 21 guarantees that hydraulic oil can enter in axis body 21.Stop part 10 can also be threaded connection or be connected in axis body 21 Baffle ring etc. will not enumerate herein as long as floating plug 3 can be stopped to deviate from and detachable.

Spring 17 can be also equipped in air cavity 201, one end of spring 17 can be resisted against the closed end of piston shaft 2, and the other end supports Be against floating plug 3, and when floating plug 3 is mobile to the closed end, spring 17 by floating plug 3 squeeze and in compressive state, so as to Floating plug 3 applies the active force towards open end, on the one hand increases the resistance mobile to closed end of floating plug 3 and on the other hand works as floating plug 3 to when the movement of open end, and the active force of spring 17 can be used as motive force, reset convenient for floating plug 3.For example, spring 17 is located at In air cavity 201 in axis body 21, and 17 one end of spring is resisted against gas-charging connection 22, and the other end is resisted against floating plug 3, when floating plug 3 to When gas-charging connection 22 is mobile, it can extrude spring 17, compress spring 17.Certainly, spring can also be not provided in air cavity 201 17。

As shown in Figure 5 and Figure 8, in this example embodiment, piston 4 can be column structure, can be equipped with perforation Centre bore 401.Piston 4 can be set in oil pocket 111, and can be sheathed on outside the closed end of axis body 21 by centre bore 401, axis body The shaft shoulder can be formed on 21,4 one end of piston can be resisted against the shaft shoulder, and the other end can be stopped by above-mentioned stop part 10, thus will Piston 4 is held between the shaft shoulder and stop part 10, is fixed on piston 4 on piston shaft 2.Certainly, welding or screw thread can also be passed through Piston 4 is fixed on the open end of axis body 21 by the other ways such as connection, is not done herein to piston 4 and the connection type of piston shaft 2 Particular determination.Meanwhile centre bore 401 can be penetrated through with axis body 21, expose open end, guarantee that hydraulic oil can enter in axis body 21.

The periphery of piston 4 can be equipped with piston seal slot 41, the quantity of piston seal slot 41 can be one, two or more It is a, sealing ring 11 can be equipped in each piston seal slot 41, the periphery of sealing ring 11 can be contacted with the side wall of oil pocket 111, i.e., It is contacted with the inner wall of cylinder 101, the side walls sealing of the periphery and oil pocket 111 that make piston 4 cooperates, thus will by piston 4 Oil pocket 111 is divided into the first cavity 1111 and the second cavity 1112, and the first cavity 1111 is located at piston 4 close to the first plug 102 Side, the second cavity 1112 is located at piston 4 close to the side of the second plug 103, and the first cavity 1111 and the second cavity Hydraulic oil is accommodated in 1112.It is, of course, also possible to make the periphery of piston 4 and the side walls of oil pocket 111 otherwise Sealing cooperation, will not enumerate herein.

As shown in figure 8, piston 4 can be equipped with damp channel, when piston 4 moves back and forth, hydraulic oil can pass through damp channel It circulates between the first cavity 1111 and the second cavity 1112, specifically, damp channel may include mutually independent first son Channel 42 and the second subchannel 43, in which:

As shown in figure 8, the first subchannel 42 may include first annular slot 421 and the first damping hole 422, in which: first Annular groove 421 can be opened in 4 periphery of piston, and cross section can be V shape, and but not limited to this, be also possible to rectangle or trapezoidal Deng, can also only cross section bottom be V-arrangement.First annular slot 421 can be located at all piston seal slots 41 close to cylinder 101 The side of top end part, and first annular slot 421 is less than each piston seal slot 41 close to the outer rim of the side wall of the first cavity 1111 Outer rim, so that first annular slot 421 can be connected to the first cavity 1111 always.First damping hole 422 can be set in piston 4, and One end of first damping hole 422 extends to piston 4 close to the end face of the second cavity 1112, and is connected to the second cavity 1112, separately One end may extend to the bottom of first annular slot 421, and be connected to the bottom of first annular slot 421.For example, the first damping Hole 422 can be connected to radial blind holes by an axial blind hole and be formed, which is connected to the second cavity 1112, the radial blind holes The bottom of first annular slot 421 can be connected to.In addition, the quantity of the first damping hole 422 can be it is multiple, such as two or three Deng the bottom of first annular slot 421 can be connected to by each first damping hole 422 with the second cavity 1112.Certainly, the first resistance The quantity in Buddhist nun hole 422 is also possible to one.

As shown in figure 5, can be equipped with the first elastic ring 12 in first annular slot 421, the material of the first elastic ring 12 be can be Rubber elastomeric material, the inner circumferential of the first elastic ring 12 can cover the first damping hole 422, that is, cover the diameter of the first damping hole 422 To blind hole；The periphery of first elastic ring 12 is not contacted with the side wall of oil pocket 111, and the first elastic ring 12 can be by the first damping hole Hydraulic oil in 422 jacks up.

As shown in figure 8, the second subchannel 43 may include the second annular groove 431 and the second damping hole 432, in which: second Annular groove 431 can be opened in 4 periphery of piston, and cross section can be V shape, rectangle or trapezoidal etc..Second annular groove 431 can position In all piston seal slots 41 close to the side of 101 bottom end of cylinder so that each piston seal slot 41 be respectively positioned on it is first annular Between slot 421 and the second annular groove 431.Meanwhile second annular groove 431 be smaller than close to the outer rim of the side wall of the second cavity 1112 The outer rim of each piston seal slot 41, so that the second annular groove 431 can be connected to the second cavity 1112 always.Second damping hole 432 It can be set in piston 4, and one end of the second damping hole 432 extends to piston 4 close to the end face of the first cavity 1111, and with first Cavity 1111 is connected to, and the other end may extend to the bottom of the second annular groove 431, and be connected to 431 bottom of the second annular groove.It has Body structure can be identical as the first damping hole 422, can also be connected to and be formed with radial blind holes by an axial blind hole, unlike, the The axial blind hole of two damping holes 432 is connected to the first cavity 1111, and radial blind holes can be connected to the bottom of the second annular groove 431 Portion.In addition, the quantity of the second damping hole 432 can be it is multiple, such as two or three, each second damping hole 432 can will The bottom of second annular groove 431 is connected to the first cavity 1111.Certainly, the quantity of the second damping hole 432 is also possible to one.

As shown in figure 5, can be equipped with the second elastic ring 13 in the second annular groove 431, the material of the second elastic ring 13 be can be Rubber elastomeric material, the inner circumferential of the second elastic ring 13 can cover the second damping hole 432, that is, cover the diameter of the second damping hole 432 To blind hole；The periphery of second elastic ring 13 is not contacted with the side wall of oil pocket 111, and the second elastic ring 13 can be by the second damping hole Hydraulic oil in 432 jacks up.

The working principle of the above-mentioned damp channel of exemplary illustration below:

When piston 4 is mobile to the bottom end of cylinder 101, the hydraulic oil in the second cavity 1112 can be made to be squeezed, the Hydraulic oil in two cavitys 1112 can enter the first damping hole 422 and the first elastic ring 12 is covered to the area of the first damping hole 422 Domain jacks up, and is connected to first annular slot 421 with the first damping hole 422, i.e. the first subchannel 42 conducting；So that the second cavity 1112 Interior hydraulic oil can enter the first cavity 1111 by the first subchannel 42, generate damping effect to hydraulic oil by the first subchannel 42 Fruit can realize buffering, damping.At the same time, the hydraulic oil in the second cavity 1112 can enter the second annular groove 431, and by second Elastic ring 13 compresses, and so that the second damping hole 432 is kept shielded state, the second subchannel 43 is not turned on.

Extruding of the hydraulic oil by piston 4 when piston 4 is mobile to the top end part of cylinder 101, in the first cavity 1111 When, the second damping hole 432 can be entered and jack up the region that the second elastic ring 13 covers the second damping hole 432, make the second annular Slot 431 is connected to the second damping hole 432, i.e. the second subchannel 43 conducting；So that the hydraulic oil in the first cavity 1111 can pass through Second subchannel 43 enters the second cavity 1112, and piston can be prevented by generating damping to hydraulic oil by the second subchannel 43 The excessive velocities that axis 2 resets, cause vehicle to shake, keep reseting procedure more steady.At the same time, the liquid in the first cavity 1111 Pressure oil can enter first annular slot 421, and the first elastic ring 12 is compressed, and the first damping hole 422 is made to keep shielded state, First subchannel 42 is not turned on.

The diameter of above-mentioned first subchannel 42 and the second subchannel 43 can be identical, so that the process that piston 4 moves back and forth In suffered damping it is identical, alternatively, the diameter of the first subchannel 42 and the second subchannel 43 can also be different, for example, the first son The diameter in channel 42 less than the second subchannel 43 diameter so that damping of the piston 4 when mobile to 101 bottom end of cylinder is big Suffered damping when to top end part movement, i.e., the pressure drag Buddhist nun of damper, which is greater than, draws damping.

In the other examples embodiment of the disclosure, the second subchannel 43 of damp channel may be alternatively provided as perforation piston The through-hole at 4 both ends.Alternatively, damp channel is also possible to the through-hole at perforation 4 both ends of piston, as long as moving back and forth in piston 4 During, hydraulic oil can be flowed through from damp channel.

The working principle of the damper of disclosure example embodiment is as follows:

When piston shaft 2 is pressurized and moves into cylinder barrel 1, i.e., when damper is compressed, the second chamber can be squeezed with piston 4 Hydraulic oil in body 1112 opens the first subchannel 42 of damp channel, and the second subchannel 43 is closed, the second cavity 1112 Interior hydraulic oil can enter the first cavity 1111 by the first subchannel 42, so that piston 4 is mobile to the bottom end of cylinder barrel 1, lead to Slow, damping effect can be played to the damping action of hydraulic oil by crossing the first subchannel 42.Meanwhile as piston shaft 2 enters oil pocket Volume in 111 is gradually increased, so that hydraulic oil can push floating plug 3 mobile to gas-charging connection 22 in the second cavity 1112, with pressure Gas in contracting air cavity 201 simultaneously reduces air cavity 201, to guarantee that piston shaft 2 is smoothly moved into cylinder barrel 1.

When the pressure of piston shaft 2 disappears, the gas compressed in air cavity 201 can push floating plug 3 to move backward, will Hydraulic oil in piston shaft 2 is extruded to the second cavity 1112, to push piston 4 to squeeze the hydraulic oil in the first cavity 1111, the After hydraulic oil in one cavity 1111 is pressurized, the second subchannel 43 of damp channel can be made to open, and the first subchannel 42 is closed, Hydraulic oil in first cavity 1111 can be back to the first cavity 1111 by the second subchannel 43, so that piston 4 and piston Axis 2 can move backward, and resetted with realizing, piston shaft 2 is made to restore un-compressed state.

The damper of disclosure example embodiment can be the pressure of piston shaft 2 by movement of the floating plug 3 in piston shaft 2 Enter to concede space, avoids increasing the length of cylinder barrel 1 to increase the stroke of piston shaft 2, under the premise of guaranteeing that stroke is constant, 1 length of cylinder barrel can be reduced, to reduce the weight and occupied space of damper, is easily installed.

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 (14)

1. a kind of damper characterized by comprising

Cylinder barrel, has oil pocket, and the oil pocket accommodates hydraulic oil；

Piston shaft, is slideably arranged in described cylinder barrel one end, and the piston shaft is hollow with closed end and open end Structure, the open end are located in the oil pocket；

Piston seals in the oil pocket and with the side walls of the oil pocket and cooperates, the oil pocket is divided into the first chamber Body and the second cavity, the piston and the piston axis connection simultaneously expose the open end, and the piston is equipped with damp channel, When the piston reciprocating is mobile, hydraulic oil can be flowed between first cavity and second cavity by the damp channel It is logical；

Floating plug is slidingly sealed cooperation in the piston shaft and with the inner wall of the piston shaft, in the floating plug and described Air cavity is formed between closed end, accommodates gas in the air cavity.

2. damper according to claim 1, which is characterized in that the piston shaft includes:

Axis body has the both ends of perforation, and one end is the open end；

Gas-charging connection, sealing are matched with the other end of the axis body, to form the closed end, and the gas-charging connection be used for The air cavity inflation.

3. damper according to claim 2, which is characterized in that the gas-charging connection includes:

Sealing, the sealing periphery are equipped with the first seal groove being sequentially distributed to the open end, the first air drain, second close Sealing groove and the second air drain, second air drain are connected to the air cavity；

First air drain bottom is equipped with the first connecting hole, is equipped in the sealing and is connected to first connecting hole and the axis Air inlet outside body, second air drain bottom are equipped with the second connecting hole, are equipped in the sealing and are connected to first gas The gas port of slot and second connecting hole；

The sealing ring with axis body inner wall sealing cooperation is equipped in first seal groove and second seal groove；It is described The first elastic ring for covering first connecting hole is equipped in first air drain, and first elastic ring can be jacked up by air-flow, with It is connected to the air inlet with first air drain；The second elasticity for covering second connecting hole is equipped in second air drain Ring, and second elastic ring can be jacked up by air-flow, so that the gas port is connected to the air cavity.

4. damper according to claim 3, which is characterized in that the sealing close to the open end end face be equipped with The via hole of the gas port perforation, the aperture of the via hole are not less than the aperture of the gas port, and are equipped in the via hole close Seal the filling member of cooperation.

5. damper according to claim 4, which is characterized in that the bottom of first air drain and/or second air drain Bottom be V-arrangement.

6. according to any one of the claim 3-5 damper, which is characterized in that the gas-charging connection further include:

Interconnecting piece, it is outer and connect with the sealing to be set to the axis body, the air inlet perforation interconnecting piece and with the external world Connection.

7. damper according to claim 1, which is characterized in that the damp channel includes mutually independent first subchannel With the second subchannel, in which:

First subchannel includes first annular slot and the first damping hole, and the first annular slot is set to the piston outer periphery simultaneously It is connected to first cavity；First damping hole is set in the piston, and one end of first damping hole is connected to Second cavity, the other end are connected to the bottom of the first annular slot, are equipped in the first annular slot and cover described the First elastic ring of one damping hole, first elastic ring can be jacked up by hydraulic oil, so that first damping hole and described The connection of one cavity；

Second subchannel include the second annular groove and the second damping hole, second annular groove be set to the piston outer periphery and Positioned at the first annular slot close to the side of second cavity, second annular groove is connected to second cavity；Institute The second damping hole is stated in the piston, and second damping hole one end is connected to first cavity, other end connection In the bottom of second annular groove, the second elastic ring for covering second damping hole, institute are equipped in second annular groove Stating the second elastic ring can be jacked up by hydraulic oil, so that second damping hole is connected to second cavity.

8. damper according to claim 7, which is characterized in that the bottom of the first annular slot and/or the second annular groove Bottom be V-arrangement.

9. damper according to claim 7, which is characterized in that the quantity of first damping hole and second damping hole It is multiple.

10. according to any one of the claim 7-9 damper, which is characterized in that the piston is equipped with piston seal slot, institute Piston seal slot position is stated between the first annular slot and second annular groove, and is equipped with and institute in the piston seal slot State the sealing ring of oil pocket side wall sealing cooperation.

11. according to claim 1,2 or 7 damper, which is characterized in that the floating plug is equipped with bleeder port, the bleeder port Interior to be equipped with closeouts, the closeouts are removably tightly connected with the bleeder port.

12. according to claim 1,2 or 7 damper, which is characterized in that the open end, which is removably connected with, can stop institute State the stop part of floating plug abjection.

13. damper according to claim 1, which is characterized in that be equipped with spring in the air cavity, the spring one end against In the closed end, the other end is resisted against the floating plug, and when the floating plug is mobile to the closed end, the spring is in Compressive state.

14. damper according to claim 1, which is characterized in that the cylinder barrel includes:

Cylinder has the both ends of perforation；

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

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