CN206017535U - The damping cylinder of range-adjustable - Google Patents

Abstract

This utility model is related to a kind of damping cylinder of range-adjustable, including cylinder body, damping mechanism is equipped with the cylinder body, the cylinder piston being connected with the damping mechanism in cylinder body, the damping mechanism is moved with the motion of cylinder piston, damping mechanism includes that damping draw-bar, the damping draw-bar are connected with stroke control mechanism to realize the scalable of damping mechanism stroke.This utility model adopts hydraulic damping mechanism to provide damping force to ensure the stability being driven, the length that the length that damping draw-bar quickly stretches out when stroke control mechanism control cylinder idle stroke is run is stretched out with relatively slower during impulse stroke, so that cylinder operationally realizes that idle stroke damping draw-bar quickly stretches out, after reaching idle stroke limit point, automatically into impulse stroke, after reaching the limit point of impulse stroke adjustable position, damping draw-bar energy fast retractile is to initial conditions.

Description

The damping cylinder of range-adjustable

Technical field

This utility model is related to the gentle cylinder technology field of hydraulic pressure, and in particular to a kind of built-in hydraulic damping mechanism of cylinder is controlling Damping draw-bar processed stretches out speed and is provided with the damping cylinder of the range-adjustable of stroke control mechanism.

Background technology

Traditional cylinder and hydraulic damper, as independent device, are standard components, hydraulic damper because of complex structure, no With adjustable position-limit mechanism, and could be worked under the state of being stressed, and cylinder is when being applied in combination, be required for greatly separately setting Frame, guiding mechanism etc. could run, although and traditional cylinder can arrange final stroke limit, takes when being applied in combination Space is larger, and structure is complex, using more inconvenience.

Utility model content

The purpose of this utility model is for above weak point, there is provided one kind has gathered damping mechanism and stroke adjustment The damping cylinder of the range-adjustable of mechanism.

This utility model solves the scheme that adopted of above-mentioned technical problem：A kind of damping cylinder of range-adjustable, including Cylinder body, is equipped with damping mechanism, the gas being connected with the damping mechanism in cylinder body in the cylinder body Cylinder piston, the damping mechanism are moved with the motion of cylinder piston, and damping mechanism includes damping draw-bar, and the damping draw-bar connects It is connected to stroke control mechanism to realize the scalable of damping mechanism stroke.

Further, the damping mechanism includes the damping outer tube for being located on damping draw-bar periphery, is arranged on damping draw-bar The damping piston of end, damping piston are provided with oil duct, and damping outer tube bore is formed to be located to damp under damping piston separation and lived The hydraulic cylinder epicoele that holds beyond the Great Wall and the hydraulic cylinder cavity of resorption positioned at damping piston lower end, under hydraulic cylinder epicoele and hydraulic cylinder, intracavity fills Full hydraulic oil, oil duct connection hydraulic cylinder epicoele and hydraulic cylinder cavity of resorption are moved with forming hydraulic damping power restriction damping piston；Described Damping outer tube is connected with cylinder piston and up and down in the case where cylinder piston drives, and the damping piston is located in damping outer tube, The damping draw-bar, damping outer tube are coaxially movably set in cylinder body, and the lower end for damping outer tube is provided with the outer lid of damping, Damping outer tube is connected with the outer lid of damping makes damping outer tube form sealing space, band dynamic damping while cylinder piston is moved Outer tube is moved, and damping piston is remained stationary as, and drives damping piston extruding hydraulic oil because damping outer tube motion, so as to form damping Power.

Further, in order to ensure stability, the reliability of damping mechanism work, sufficient damping is provided in operative orientation Power, can quick oil return during inoperative direction；One end of the damping draw-bar into screw shaped and screws up female thread in damping piston Kong Li, the oil duct include that the unidirectional oil duct in damping piston, the unidirectional oil duct are equipped with the compressing of damping draw-bar bottom One-way valve spring and check valve hoodle, the one-way valve spring and check valve hoodle mating reaction make unidirectional oil duct unidirectional Logical, specially one-way valve spring one end is installed in damping draw-bar, the upper surface of described check valve hoodle one end and unidirectional oil duct Contact, the other end of check valve hoodle are contacted with one-way valve spring and acted on to block unidirectional oil duct by one-way valve spring elastic force, The unidirectional oil duct conducting when oil pressure is more than the elastic force of unidirectional spring, is located in damping piston by unidirectional oil duct and is provided with an aperture is Oil duct, the aperture of the lower oil duct are less than the aperture of unidirectional oil duct, and damping piston is tilted to be provided with and unidirectional oil duct and lower oil duct The upper oil duct for communicating, the top of the damping piston is into circular and be inserted in spanner when being provided with a flat position for installing；The resistance Buddhist nun's piston is provided with sealing ring, is offered for installing the seal groove of sealing ring on damping piston.

Further, in order to control damping piston extreme position upwards；The inwall of the damping outer tube is provided with when resistance When Buddhist nun's piston relative damping outer tube carries out axially-movable upwards in order to limit damping piston shift position spacing back-up ring.

Further, in order that damping outer tube forms annular seal space and ensures stablizing for hydraulic pressure；In the damping outer tube It is located above damping piston and is provided with the oil sealing that can be floated according to oil pressure, the upper surface of the damping outer tube and cylinder piston Between there is gap and form air pressure balance groove, the cylinder piston be provided be connected with air pressure balance groove for connecting damping outward The air equalizer opening of portion's air pressure is sealed up with equilibrium oil with inside cylinder body inside pipe.

Further, in order to realize the scalable of damping draw-bar impulse stroke, the big of impulse stroke can be arranged as required to Little, impulse stroke is changed by screw of the stroke adjustment nut on damping draw-bar；The stroke control mechanism includes The idle stroke stop collar of the step shaft-like on cylinder body top is arranged in, the upper end of idle stroke stop collar is spirally connected and adjusts fixed spiral shell Stepped hole is provided with along axial line in lid, idle stroke stop collar, the stepped hole positioned at lower end is spirally connected in the step-like gag lever post of flange Blind nut, in the gag lever post, blind nut is provided with coaxial through-hole along axial line, and in the gag lever post, the upper surface of blind nut is provided with interior sealing Enclose and screw up on idle stroke stop collar；Described regulation be set with stroke adjustment between fixed blind nut and idle stroke stop collar Nut, stroke adjustment nut are flange nut, adjust fixed blind nut and are provided with flange, and the lower surface for adjusting fixed blind nut pressed against The upper surface of idle stroke stop collar, the banjo clip of stroke adjustment nut are adjusting the flange and idle stroke stop collar of fixed blind nut Between upper surface, stroke adjustment nut is that gap coordinates so that stroke adjustment nut freely can be rotated with fixed blind nut is adjusted；Institute State stepped hole that damping draw-bar slid through in coaxial through-hole and idle stroke stop collar in gag lever post in blind nut so that with row Journey adjusting nut screws up installation, and the stroke adjustment nut is connected the entirety of composition with damping draw-bar can be in idle stroke stop collar Freely rotate in hole.

Further, the quantity of cushion block, in order to realize the scalable of damping draw-bar idle stroke, is adjusted by changing idle stroke Or height carrys out reached purpose；Movable sleeve is provided with polylith for spacing null successively vertically for the periphery of the idle stroke stop collar The idle stroke adjustment cushion block of Cheng Changdu and idle stroke cushion pad.

Further, in order to stroke adjustment nut is fixedly attached on damping draw-bar；Row is located on the damping draw-bar Stroke fastening screw nut is bolted with above journey adjusting nut.

Further, for pusher cylinder piston movement, change cylinder piston movement velocity and then adjust damping mechanism work Make speed；The cylinder body is provided with the first air inlet/outlet, the second air inlet/outlet, first air inlet/outlet, the second turnover It is separately provided for adjusting the regulation valve union A of gas turnover uninterrupted in QI KOU, adjusts valve union B, the cylinder sheet Be provided with body D, the gas is switched for controlling to adjust valve union A, the Magnetic Induction switch C for adjusting valve union B, Magnetic Induction Be provided with cylinder piston and the cylinder magnet ring that C or Magnetic Induction switch D switched for triggering and conducting Magnetic Induction, in order to rely on gas The motion of cylinder piston comes closed magnetic inductive switch C, Magnetic Induction switch D.

Further, when the first air inlet/outlet air inlet, the second air inlet/outlet aerofluxuss, band while cylinder piston is moved downward Dynamic damping mechanism kinematic, the second air inlet/outlet air inlet, the first air inlet/outlet aerofluxuss drive resistance while cylinder piston is moved upwards Buddhist nun's mechanism kinematic.

Further, include cylinder body, be respectively arranged in cylinder body two ends to ensure the sealing of device, the cylinder body Cylinder head, be respectively arranged with sealing ring on the contact surface of the cylinder head and cylinder body, spacing with idle stroke in the cylinder head Sealing ring is respectively arranged with the contact surface of set, sealing ring is provided with the contact surface of cylinder body on the cylinder piston, is damped Limited location wire loop is set with the contact surface of damping draw-bar on piston, with setting on the contact surface of damping outer tube on damping piston There is sealing ring, in gag lever post, on blind nut, inner seal ring is again provided with the contact surface of damping draw-bar.

For than prior art, this utility model has advantages below：

(1) this utility model is drawn with damping using the damping mechanism being built on damping draw-bar when Telescopic-cylinder is moved The characteristics of bar is coaxial, enables to produce the stable damping force without departing from transmission center to ensure the steady of transmission during pulling force damping action Qualitative.

(2) this utility model by adjust installed in the first air inlet/outlet, the regulation valve union A on the second air inlet/outlet, Valve union B is adjusted, intake and exhaust amount size of the cylinder in the unit interval is controlled, in the impulse stroke that damping mechanism works, The speed that control damping draw-bar stretches out can be adjusted.

(3) this utility model controls what damping draw-bar when cylinder idle stroke is run quickly stretched out by stroke control mechanism The length that length is stretched out with relatively slower during impulse stroke, the linkage feature of stroke control mechanism make cylinder operationally realize null Journey damping draw-bar quickly stretches out, and after reaching idle stroke limit point, automatically into impulse stroke, reaches impulse stroke adjustable position Limit point after, damping draw-bar energy fast retractile is to initial conditions.

(4), compared to the device being applied in combination using traditional cylinder and hydraulic damper, structure is more for this utility model Simply, small volume, is not required to separately set support and guiding mechanism etc..

Description of the drawings

The utility model is described in further detail in conjunction with the embodiments with reference to the accompanying drawings：

Fig. 1 is structural representation of the present utility model；

Fig. 2 is structural representation when resting on initial position after cylinder idle stroke and the spacing adjustment of impulse stroke；

Fig. 3 is structural representation of cylinder idle stroke operation when impulse stroke does not also start in place；

Fig. 4 be cylinder operation running in place when structural representation；

Fig. 5 is the connection diagram of damping piston and damping draw-bar；

Fig. 6 is the half-sectional structural representation of damping piston.

In figure：

1- cylinder bodies；101- adjusts valve union A；102- Magnetic Inductions switch C；103- Magnetic Inductions switch D；104- is adjusted Section valve union B；105- cylinder magnet rings；106- cylinder head；107- cylinder head cushion pads；110- cylinder pistons；111- sealing rings； 112- air equalizer openings；120- upper chamber of air cylinder；121- lower chamber of air cylinder；

2- damping mechanisms；201- oil sealings；202- damping draw-bars；210- damps outer tube；The spacing back-up rings of 211-；220- dampings are lived Plug；221- one-way valve springs；222- check valve hoodles；223- sealing rings；The spacing wire loops of 224-；The unidirectional oil ducts of 225-；226- Lower oil duct；The upper oil ducts of 227-；230- damps outer lid；231- outer tube cover seal circles；240- hydraulic cylinder epicoeles；Under 241- hydraulic cylinders Chamber；

3- stroke control mechanisms；301- stroke adjustment nuts；302- stroke fastening screw nuts；310- idle stroke stop collars； 311- idle strokes adjust cushion block；312- idle stroke cushion pads；313- adjusts fixed blind nut；314- inner seal rings；315- gag lever posts Interior blind nut.

Specific embodiment

This utility model content is described in detail with reference to Figure of description and specific embodiment：

As shown in figs. 1 to 6, a kind of damping cylinder of range-adjustable, including cylinder body 1, adjusts valve union A 101, adjusts Section valve union B 104, cylinder magnet ring 105, cylinder head 106, cylinder head cushion pad 107 and accessory for being mounted on these parts etc. With Magnetic Induction switch 102, the Magnetic Induction switch 103 for needing configuration because of control, the installation method of all of above part is existing There is installation method, be no longer described in detail here；

Also include the damping mechanism 2 being arranged in cylinder body 1, the cylinder piston 110 for being connected to damping mechanism 2 and wear Stroke control mechanism 3 in 106 medium pore of cylinder head of upper end, also, the damping draw-bar 202 in damping mechanism 2 passes through Idle stroke stop collar 310 in stroke adjustment system 3, and by adjusting fixed blind nut 313 and stroke adjustment nut 301 and null Journey stop collar 310 is in succession together.

In the present embodiment, under the inwall of the cylinder body 1, the outer wall of damping outer tube 210 and cylinder piston 110 Lower chamber of air cylinder 121, the inwall of cylinder body 1,110 upper end of the outer wall of damping draw-bar 202 and cylinder piston is formed between end face Upper chamber of air cylinder 120 is formed between face, damps inwall, 220 upper end of the outer wall of damping draw-bar 202 and damping piston of outer tube 210 Hydraulic cylinder epicoele 240 is formed between face, is damped Cavity of resorption 241, the top of the cylinder body 1, the bottom of cylinder body 1 are respectively equipped with makes upper chamber of air cylinder 120, lower chamber of air cylinder 121 It is in communication with the outside to enter the first air inlet/outlet, second air inlet/outlet of outlet respectively, on the damping piston 220, is provided with connection Hydraulic cylinder epicoele 240 and the oil duct of hydraulic cylinder cavity of resorption 241.

In the present embodiment, the damping mechanism 2 includes damping outer tube 210, the external screw thread of 210 upper end of the damping outer tube Screw up in the internal thread hole of cylinder piston 110, there is a sulculus upper surface of damping outer tube 210, by cylinder piston 110 The air pressure balance groove that gap between 210 end of female thread root and damping outer tube is formed, is put down with the air pressure on cylinder piston 110 Weighing apparatus hole 112 communicates, and plays a part of to balance 201 top air pressure of oil sealing.

In the present embodiment, it is provided with the inner wall groove that spacing back-up ring 211 is installed on damping outer tube 210 in damping outer tube 210 In order to limit damping piston 220；The inner upper of damping outer tube 210 is set with oil sealing 201；The damping piston 220 close Sealing ring 223 is set with sealing groove.

In the present embodiment, the lower end of the damping draw-bar 202 in the damping outer tube 210 is screwed up in damping into screw shaped In the internal thread hole of piston 220, limited location wire loop 224, damping piston are set between damping draw-bar 202 and damping piston 220 220 central authorities have unidirectional oil duct 225 with the compressing of 202 bottom of damping draw-bar equipped with one-way valve spring 221 and check valve hoodle 222, single Have a hole slot to by oil duct 225 for lower oil duct 226, damping piston 220 laterally has upper oil duct 227, can with unidirectional oil duct 225 and under Oil duct 226 is communicated, upper oil duct 227, unidirectional oil duct 225 and lower oil duct 226 composition oil duct, and 220 top of damping piston is into annular shape A flat position is provided with, spanner is inserted in use during convenient installation, also energy passes through hydraulic oil as oil duct；The upper end of damping draw-bar 202 Into screw shaped, head has a flat position, and when facilitating mounting and adjusting, spanner is inserted in and turns, and damping draw-bar 202 through oil sealing 201 and is mounted in The centre bore of the sealing ring 111 on cylinder piston 110, is connected with stroke adjustment system 3.

In the present embodiment, when installing and using, oil sealing 201 is pushed into the upper surface for encountering spacing back-up ring 211, damping piston 220 are pushed into the lower surface for encountering spacing back-up ring 211, the upset of 210 position of damping outer tube, allow and can fill the one of the outer lid 230 of damping End upward, fills hydraulic oil, and outer for the damping that is set with outer tube cover seal circle 231 lid 230, sealing are screwed up in damping outer tube In 210 female thread, after damping outer tube 210 is linked to be an entirety with the outer lid 230 of damping, profile and act on and traditional damping Pull bar 202 is without difference；Because as long as the damping piston 220 of ining succession of damping draw-bar 202 starts to push down on, damping draw-bar 202 just has One section is in hydraulic cylinder epicoele 240 all the time, causes the sectional area of hydraulic cylinder epicoele 240 than the sectional area of hydraulic cylinder cavity of resorption 241 Little, and the two chambeies have been further filled with hydraulic oil with extraneous air isolation, and during running of hydraulic power oil, volume is constant all the time, institute With, no matter where damping piston 220 rests on, oil sealing 201 all can automatic sliding to the total totality of hydraulic cylinder upper and lower cavity On the constant position of product, damping draw-bar 202 is promoted, make the damping piston 220 that ins succession advance to lower surface and encounter the outer lid of damping During 230 upper surface, oil sealing 201 is slided to highest point, and 201 upper surface of oil sealing is designed as the top for not exposing damping outer tube 210.

In the present embodiment, the stroke control mechanism 3 includes the step being arranged in 106 medium pore of cylinder head of upper end The idle stroke stop collar 310 of shaft-like, the upper end small diameter position of idle stroke stop collar 310 is external screw thread, idle stroke stop collar 310 are provided with concentric steps hole along axial line, and the major diameter position positioned at the stepped hole of lower end is provided with female thread；Blind nut in gag lever post There is coaxial through-hole at 315 centers, and in gag lever post, the profile of blind nut 315 is that flange is step-like, and periphery is provided with screw thread, and end of thread face pressure Inner seal ring 314 is screwed up on idle stroke stop collar 310；Stroke adjustment nut 301 is a flange nut, adjusts fixed blind nut 313 sets the flange of stroke adjustment nut 301 screw up on the external screw thread of idle stroke stop collar 310, adjust fixed blind nut 313 Lower surface pressed against the step end face of idle stroke stop collar 310, and the flange end of stroke adjustment nut 301 is clipped in the middle, and adjust Fixed blind nut 313 is that gap coordinates, and freely can rotate after dress.Damping draw-bar 202 in damping mechanism 2 is slid through in gag lever post Blind nut 315 and the centre bore of idle stroke stop collar 310, then screw up through stroke adjustment nut 301 and stroke fastening screw nut 302, The two nuts and tight after, become an entirety with damping draw-bar 202 and the part that ins succession, can be in idle stroke stop collar 310 Freely rotate in hole；On the external diameter of idle stroke stop collar 310, slide and idle stroke cushion pad 312 and some pieces are equipped with because of null The spacing needs of the length of journey and stacked the idle stroke adjustment cushion block 311 of position-limiting action, position is in and is clipped in cylinder head 106 And adjust between fixed blind nut 313.

In the present embodiment, described cylinder piston 110 has no different, its difference from the structural principle of traditional cylinder piston Part is：There is the position that can hold 315 flange of blind nut in gag lever post one end that there is step-like hole in 110 central authorities of cylinder piston, i.e., In cylinder return, the cylinder head cushion pad 107 of cushioning effect can have been encountered in the upper surface of cylinder piston 110；Cylinder piston 110 Endoporus in the middle part of be provided with seal groove and sealing ring 111,202 stage casing of damping draw-bar slides through sealing ring 111, convenient outer to damping Hydraulic oil in pipe is sealed；

Specific implementation process：Before startup, cylinder is connected source of the gas, power supply, controlling organization and external part.

The length of operating and setting damping draw-bar idle stroke work：As shown in Fig. 2 cylinder piston 110 is arranged resting on most Upper end is initial position, and Magnetic Induction switch 102 is adjusted to sense the cylinder magnet ring obtained on cylinder piston 110 105 position；The height of cushion block 311 is adjusted by pre-setting idle stroke, i.e., place the sky of different-thickness by required height Traffic control system cushion block 311 and idle stroke cushion pad 312 are stacked, and fix blind nut equivalent to adjustment in initial position, is provided with The distance of plane on 313 lower planes and idle stroke cushion pad 312, to realize the regulation of damping draw-bar idle stroke active length.

The length of operation adjustment hydraulic damping impulse stroke：Unscrew stroke fastening screw nut 302, in advance damping draw-bar 202 Height required for being screwed onto, i.e. distance of the upper plane of adjustment damping piston 220 to 211 lower plane of spacing back-up ring, in order to not allow Damping draw-bar 202 walks, and tightens stroke fastening screw nut 302 after adjustment again, and now Magnetic Induction switch 103 also accordingly will be adjusted to Where cylinder magnet ring 105 can sense and obtain.

Begin to use, activate switch, adjust 101 air inlets of valve union A, adjust 104 aerofluxuss of valve union B, cylinder piston 110 Chamber is because forming draught head with dynamic damping outer tube 210 and the outer lid 230 of the damping for linking together and outer tube cover seal circle 231 in front and back Quickly move down；Damping piston 220 is because being connected to or being indirectly connected with damping draw-bar 202, one-way valve spring 221, check valve Hoodle 222, sealing ring 223, stroke adjustment nut 301, stroke fastening screw nut 302, adjust fixed blind nut 313, idle stroke spacing Blind nut 315 and inner seal ring 314 in set 310, gag lever post, because being enclosed within the sealing ring 223 above damping piston 220 with damping outer tube 210 have frictional resistance, and above part is quickly moved down together also with damping outer tube 210.

When the fixed blind nut 313 of regulation encounters idle stroke cushion pad 312, adjusted by idle stroke cushion pad 312 and idle stroke The restriction of cushion block 311, damping piston 220 and the part for connecting together halt；As shown in figure 3, now, cylinder piston 110 Continue band dynamic damping outer tube 210 descending, because damping piston 220 is remained stationary as, cause the hydraulic oil of hydraulic cylinder epicoele 240 pressurized logical The upper oil duct 227 of overdamp piston 220 and lower oil duct 226 enter hydraulic cylinder cavity of resorption 241；One-way valve spring 221 is oppressed unidirectional Valve hoodle 222 withstands unidirectional oil duct 225, and because hydraulic oil flow direction is consistent with spring force direction, unidirectional oil duct 225 is made by check valve With in closing, hydraulic oil is not passed through；The aperture of lower oil duct 226 set less, hydraulic oil by when be obstructed, slow down damping outer The forward speed of pipe 210, damping cylinder enter the hydraulic damping state of impulse stroke.

Because the sectional area of hydraulic cylinder epicoele 240 is less than the sectional area of hydraulic cylinder cavity of resorption 241, and the two chambeies are filled with liquid Force feed, during running of hydraulic power oil, volume is constant all the time, and in the environment of isolation air, the cumulative volume in the two chambeies is also just constant, So, when damping outer tube 210 is descending, oil sealing 201 is understood Automatic-descending and remains the totality for being in that the upper and lower chamber of hydraulic cylinder adds up to On the constant position of product, as 201 top of oil sealing has the passage of equilibrium air pressure, oil sealing 201 to slide up and down.

Because damping oil hole size is constant, pre-adjust and adjust valve union A 101 and adjust 104 adjustable intake and exhaust of valve union B The size in hole, can control intake and exhaust amount size of the cylinder in the unit interval, make damping outer tube 210 overcome damping force to become when moving ahead Obtaining can be soon or slow, have adjusted what damping draw-bar 202 stretched out so as to reach in certain scope and in the case of damping Speed, that is, reach the purpose of adjustment impulse stroke speed.

During motion, damping outer tube 210 moves ahead with the spacing back-up ring 211 being stuck in pore inner wall groove, until spacing back-up ring 211 lower planes encounter the upper plane of damping piston 220, and stopping of being obstructed moves ahead, and hydraulic damping impulse stroke terminates, as shown in figure 4, Now, Magnetic Induction switch 103 senses cylinder magnet ring 105 and works, and link external control electrical equipment, and cylinder starts return；

During return, the device of external control makes 104 air inlets of regulation valve union B to lower chamber of air cylinder 121, upper chamber of air cylinder 120 Air from adjusting 101 aerofluxuss of valve union A, so, the air pressure of lower chamber of air cylinder 121 is bigger than the air pressure of upper chamber of air cylinder 120, makes cylinder Piston 110 is with the part for connecting quickly to initial position direction return；The same sealing ring because being enclosed within above damping piston 220 223 and the frictional resistance that exist of damping outer tube 210, in succession or successively the part of damping piston 220 also with damping outer tube 210 together quickly to initial position direction return.

When in the gag lever post being indirectly connected to damping piston 220, blind nut 315 touches the cylinder in cylinder head 106 During lid cushion pad 107, be obstructed stopping return, and cylinder piston 110 continues to first with the 210 grade part of damping outer tube for connecting together Beginning locality return, the pressurized part of the hydraulic oil of hydraulic cylinder cavity of resorption 241 along former passage rework solution cylinder pressure epicoele 240, because Hydraulic oil flow direction and 221 elastic force of one-way valve spring at this time is in opposite direction, and 221 elastic force of one-way valve spring designs less, hydraulic pressure Oil pressure opens the check valve hoodle 222 for withstanding unidirectional oil duct 225 enough, so, most of hydraulic oil is logical from unidirectional oil duct 225 Cross oil duct 227 and enter hydraulic cylinder epicoele 240, oil sealing 201 and descending when same principle also self-return, until stroke is tied Beam, Magnetic Induction switch 102 sense cylinder magnet ring 105 and work that link external control electrical equipment, and air inlet stops, and hydraulic pressure hinders One cycle of operation of Buddhist nun's cylinder terminates.

Above-listed preferred embodiment, is further described to the purpose of this utility model, technical scheme and advantage, Be should be understood that the foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all Within spirit of the present utility model and principle, any modification, equivalent substitution and improvements that is made etc. should be included in this practicality Within new protection domain.

Claims (8)

1. a kind of damping cylinder of range-adjustable, including cylinder body (1), it is characterised in that：Wear in cylinder body (1) There is damping mechanism (2), the cylinder piston (110) being connected with damping mechanism (2) in cylinder body (1), the resistance Buddhist nun mechanism (2) is moved with the motion of cylinder piston (110), and damping mechanism (2) includes that damping draw-bar (202), the damping draw Bar (202) is connected with stroke control mechanism (3) to realize the scalable of damping mechanism (2) stroke.

2. the damping cylinder of range-adjustable according to claim 1, it is characterised in that：Damping mechanism (2) also include Be located on damping draw-bar (202) periphery damping outer tube (210), installed in damping draw-bar (202) end damping piston (220), damping piston (220) are provided with oil duct, and cylinder piston (110) is coaxially movably set on damping draw-bar (202) And up and down along damping draw-bar (202), damping outer tube (210) is connected and by cylinder piston with cylinder piston (110) (110) drive and move up and down, damping draw-bar (202), damping outer tube (210) are coaxially movably set in cylinder body (1) Interior, the lower end for damping outer tube (210) is enclosed construction.

3. the damping cylinder of range-adjustable according to claim 2, it is characterised in that：The one of damping draw-bar (202) Hold into screw shaped and screw up in damping piston (220), the oil duct includes the unidirectional oil duct in damping piston (220) (225), unidirectional oil duct (225) are equipped with one-way valve spring (221) and check valve hoodle with the compressing of damping draw-bar (202) bottom (222), one-way valve spring (221) and check valve hoodle (222) mating reaction makes the unidirectional oil duct (225) can only be unidirectional Logical, be located in damping piston (220) by unidirectional oil duct (225) and an aperture be provided with for lower oil duct (226), in damping piston (220) Inclination is provided with the upper oil duct (227) communicated with unidirectional oil duct (225) and lower oil duct (226), and damping piston (220) are provided with Sealing ring (223).

4. the damping cylinder of range-adjustable according to claim 2, it is characterised in that：Described damping outer tube (210) interior Wall is provided with when damping piston (220) relative damping outer tube (210) carries out axially-movable upwards in order to limit damping piston (220) the spacing back-up ring (211) of shift position.

5. the damping cylinder of range-adjustable according to claim 2, it is characterised in that：Damping outer tube (210) the interior position Be provided with the oil sealing (201) that can be floated according to oil pressure above damping piston (220), damping outer tube (210) upper End and cylinder piston (110) are spirally connected and damp and there is gap to be formed between the upper surface of outer tube (210) and cylinder piston (110) Air pressure balance groove, cylinder piston (110) are provided be connected with air pressure balance groove internal for connecting damping outer tube (210) Internal with cylinder body (1) balancing the air equalizer opening (112) of oil sealing (201) top air pressure.

6. the damping cylinder of range-adjustable according to claim 1, it is characterised in that：Described stroke control mechanism (3) wrap Include the idle stroke stop collar (310) of the step shaft-like for being arranged in cylinder body (1) top, the upper end of idle stroke stop collar (310) The fixed blind nut (313) of the regulation that is spirally connected, is provided with stepped hole along axial line in idle stroke stop collar (310), positioned at the stepped hole of lower end Blind nut (315) in the step-like gag lever post of the flange that is spirally connected, in the gag lever post, blind nut (315) is provided with coaxial through-hole along axial line, In the gag lever post, the upper surface of blind nut (315) is provided with inner seal ring (314) and screws up installed in idle stroke stop collar (310) On；Described regulation is set with stroke adjustment nut (301) between fixed blind nut (313) and idle stroke stop collar (310), stroke is adjusted Section nut (301) is flange nut, adjusts fixed blind nut (313) and is provided with flange, and the lower surface for adjusting fixed blind nut (313) is tight The upper surface of idle stroke stop collar (310) is press against, the banjo clip of stroke adjustment nut (301) is adjusting fixed blind nut (313) Between the upper surface of flange and idle stroke stop collar (310), stroke adjustment nut (301) and adjust between fixed blind nut (313) be Gap coordinates so that stroke adjustment nut (301) freely can be rotated；Damping draw-bar (202) slide through blind nut in gag lever post (315) stepped hole in coaxial through-hole and idle stroke stop collar (310) in further screws up peace with stroke adjustment nut (301) Dress, stroke adjustment nut (301) are connected the entirety of composition with damping draw-bar (202) can be in idle stroke stop collar (310) Freely rotate in hole.

7. the damping cylinder of range-adjustable according to claim 6, it is characterised in that：Damping draw-bar (202) are upper Stroke fastening screw nut (302) is also bolted with the top of stroke adjustment nut (301).

8. the damping cylinder of range-adjustable according to claim 6, it is characterised in that：Idle stroke stop collar (310) Periphery vertically successively movable sleeve be provided with polylith for adjust limit damping pull bar idle stroke length idle stroke adjust cushion block And idle stroke cushion pad (312) (311).