CN106195096A

CN106195096A - The damping cylinder of range-adjustable

Info

Publication number: CN106195096A
Application number: CN201610769159.9A
Authority: CN
Inventors: 林雄
Original assignee: FUDING JINXIONG LOCOMOTIVE COMPONENT CO LTD
Current assignee: FUDING JINXIONG LOCOMOTIVE COMPONENT CO LTD
Priority date: 2016-08-30
Filing date: 2016-08-30
Publication date: 2016-12-07
Anticipated expiration: 2036-08-30
Also published as: CN106195096B

Abstract

The present invention relates to the damping cylinder of a kind of range-adjustable, including cylinder body, it is equipped with damping mechanism in described cylinder body, connect on described damping mechanism and have the cylinder piston being located in cylinder body, described damping mechanism moves with the motion of cylinder piston, damping mechanism includes damping draw-bar, and described damping draw-bar connects has stroke control mechanism to realize the scalable of damping mechanism stroke.The present invention uses hydraulic damping mechanism to provide damping force to ensure the stability of transmission, stroke control mechanism controls the length that the length that when cylinder idle stroke is run, damping draw-bar quickly stretches out is stretched out with relatively slower during impulse stroke, so that cylinder operationally realizes idle stroke damping draw-bar and quickly stretches out, after arriving idle stroke limit point, automatically into impulse stroke, after arriving 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

The present invention relates to hydraulic pressure gentle cylinder technology field, be specifically related to a kind of cylinder built-in hydraulic damping mechanism to control to hinder Buddhist nun's pull bar stretches out speed and is provided with the damping cylinder of range-adjustable of stroke control mechanism.

Background technology

Traditional cylinder and hydraulic damper, as independent device, are standard components, and hydraulic damper is complicated because of structure, no Carry adjustable position-limit mechanism, and be could to work under the state of being stressed, and when cylinder is applied in combination, is required for greatly separately setting and props up Frame, guiding mechanism etc. could run, although and traditional cylinder final stroke limit can be set, but take when being applied in combination Space is relatively big, and structure is complex, uses more inconvenience.

Summary of the invention

It is an object of the invention to for above weak point, it is provided that one has gathered damping mechanism and stroke control mechanism The damping cylinder of range-adjustable.

The present invention solves the scheme that above-mentioned technical problem used: the damping cylinder of a kind of range-adjustable, including cylinder Body, is equipped with damping mechanism in described cylinder body, described damping mechanism connects and has the cylinder being located in cylinder body to live Plug, described damping mechanism moves with the motion of cylinder piston, and damping mechanism includes damping draw-bar, and described damping draw-bar connects to be had Stroke control mechanism is to realize the scalable of damping mechanism stroke.

Further, described damping mechanism includes being located on the damping outer tube of damping draw-bar periphery, being arranged on damping draw-bar The damping piston of end, damping piston is provided with oil duct, and damping outer tube bore is formed to be positioned to damp under damping piston separates and lives The hydraulic cylinder epicoele held beyond the Great Wall and the hydraulic cylinder cavity of resorption being positioned at damping piston lower end, under hydraulic cylinder epicoele and hydraulic cylinder, intracavity all fills Full hydraulic oil, oil duct connection hydraulic cylinder epicoele and hydraulic cylinder cavity of resorption limit damping piston motion to form hydraulic damping power；Described Damping outer tube is connected with cylinder piston and up and down under cylinder piston drives, and described damping piston is located in damping outer tube, Described damping draw-bar, damping outer tube are the most coaxially movably set in cylinder body, and the lower end of 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 motion Outer tube moves, and damping piston remains stationary as, and because damping outer tube motion drives damping piston squeezed fluid force feed, thus forms damping Power.

Further, in order to ensure stability, the reliability that damping mechanism works, sufficient damping is provided at operative orientation Power, can quickly oil return during inoperative direction；One end of described damping draw-bar becomes screw shaped and screws up the female thread at damping piston Kong Li, described oil duct includes the unidirectional oil duct being located in damping piston, oppress bottom described unidirectional oil duct and damping draw-bar equipped with One-way valve spring and check valve hoodle, described one-way valve spring and check valve hoodle mating reaction make the unidirectional oil duct can only be unidirectional Logical, specially one-way valve spring one end is installed in damping draw-bar, described check valve hoodle one end and the upper surface of unidirectional oil duct Contact, the other end of check valve hoodle contacts with one-way valve spring and by one-way valve spring elastic force effect to block unidirectional oil duct, The unidirectional oil duct conducting when oil pressure is more than the elastic force of unidirectional spring, is positioned in damping piston by unidirectional oil duct and is provided with under an aperture is Oil duct, the aperture of described lower oil duct is 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 communicated, spanner is inserted in when becoming circular and be provided with a flat position for installing in the top of described damping piston；Described resistance Buddhist nun's piston is provided with sealing ring, and damping piston offers the seal groove for installing sealing ring.

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

Further, in order to make damping outer tube form annular seal space and ensure stablizing of hydraulic pressure；In described damping outer tube Be positioned at damping piston be arranged over can carry out the oil sealing that floats, the upper surface of described damping outer tube and cylinder piston according to oil pressure Between exist gap formed air pressure balance groove, described cylinder piston be provided be connected with air pressure balance groove for connecting outside damping Seal up the air equalizer opening of portion's air pressure with equilibrium oil inside pipe inside and cylinder body.

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, change impulse stroke by the screw on damping draw-bar of the stroke adjustment nut；Described stroke control mechanism includes Being arranged in the idle stroke stop collar of the step shaft-like on cylinder body top, the upper end of idle stroke stop collar is spirally connected and regulates fixing spiral shell Lid, is provided with stepped hole along axial line in idle stroke stop collar, is positioned at the stepped hole of lower end and is spirally connected the step-like gag lever post of flange Blind nut, in described gag lever post, blind nut is provided with coaxial through-hole along axial line, and in described gag lever post, the upper surface of blind nut is provided with interior sealing Enclose and screw up and be arranged on idle stroke stop collar；Described regulation is fixed and is set with stroke adjustment between blind nut and idle stroke stop collar Nut, stroke adjustment nut is flange nut, and the fixing blind nut of regulation is provided with flange, and the lower surface of the fixing blind nut of regulation pressed against The upper surface of idle stroke stop collar, the banjo clip of stroke adjustment nut fixes flange and the idle stroke stop collar of blind nut in regulation Between upper surface, stroke adjustment nut blind nut fixing with regulation is that matched in clearance is so that stroke adjustment nut can be freely rotatable；Institute State coaxial through-hole that damping draw-bar slides through in gag lever post in blind nut and the stepped hole in idle stroke stop collar so that with row Journey adjusting nut screws up installation, and described stroke adjustment nut is connected the entirety of composition with damping draw-bar can be at idle stroke stop collar In hole freely rotatable.

Further, in order to realize the scalable of damping draw-bar idle stroke, adjust the quantity of cushion block by changing idle stroke Or highly reach purpose；The periphery movable sleeve the most successively of described idle stroke stop collar is provided with polylith for spacing null The idle stroke of Cheng Changdu adjusts cushion block and idle stroke cushion pad.

Further, in order to stroke adjustment nut is fixedly attached on damping draw-bar；It is positioned at row on described damping draw-bar The top of journey adjusting nut is bolted with stroke fastening screw nut.

Further, in order to promote cylinder piston to move, change cylinder piston movement velocity and then adjust damping mechanism work Make speed；Described cylinder body is provided with the first air inlet/outlet, the second air inlet/outlet, described first air inlet/outlet, the second turnover Being separately provided in QI KOU regulating the regulation valve union A of gas turnover uninterrupted, regulation valve union B, described cylinder is originally It is provided with on body for controlling to adjust valve union A, the Magnetic Induction switch C of regulation valve union B, Magnetic Induction switch D, described gas It is provided with on cylinder piston for triggering and conducting Magnetic Induction switch C or the cylinder magnet ring of Magnetic Induction switch D, 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 aerofluxus, cylinder piston carries while moving downward Dynamic damping mechanism kinematic, the second air inlet/outlet air inlet, the first air inlet/outlet aerofluxus, cylinder piston drives resistance while moving upward Buddhist nun's mechanism kinematic.

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

For prior art, the invention have the advantages that

(1) present invention is when Telescopic-cylinder moves, and utilizes the damping mechanism being built on damping draw-bar same with damping draw-bar The feature of axle, makes to produce the stable damping force without departing from transmission center during pulling force damping action to ensure stablizing of transmission Property.

(2) present invention is arranged on the first air inlet/outlet, the second air inlet/outlet by regulation regulation valve union A, regulation Valve union B, controls cylinder intake and exhaust amount size in the unit interval, in the impulse stroke that damping mechanism works, can adjust Joint controls the speed that damping draw-bar stretches out.

(3) present invention passes through stroke control mechanism, controls the length that when cylinder idle stroke is run, damping draw-bar quickly stretches out The length stretched out with relatively slower during impulse stroke, the linkage feature of stroke control mechanism makes cylinder operationally realize idle stroke resistance Buddhist nun's pull bar quickly stretches out, and after arriving idle stroke limit point, automatically into impulse stroke, arrives the limit of impulse stroke adjustable position Behind site, damping draw-bar energy fast retractile is to initial conditions.

(4) present invention is compared to the device using traditional cylinder and hydraulic damper to be applied in combination, and structure is simpler, Volume is little, is not required to separately set support and guiding mechanism etc..

Accompanying drawing explanation

The invention will be further described the most in conjunction with the embodiments:

Fig. 1 is the structural representation of the present invention；

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

Fig. 3 is the structural representation that cylinder idle stroke runs when the impulse stroke that puts in place does not starts；

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

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

Fig. 6 be damping piston partly cut open structural representation.

In figure:

1-cylinder body；101-regulates valve union A；102-Magnetic Induction switch C；103-Magnetic Induction switch D；104-adjusts Joint valve union B；105-cylinder magnet ring；106-cylinder head；107-cylinder head cushion pad；110-cylinder piston；111-sealing ring； 112-air equalizer opening；120-upper chamber of air cylinder；121-lower chamber of air cylinder；

2-damping mechanism；201-oil sealing；202-damping draw-bar；210-damps outer tube；The spacing back-up ring of 211-；220-damps and lives Plug；221-one-way valve spring；222-check valve hoodle；223-sealing ring；The spacing wire loop of 224-；The unidirectional oil duct of 225-；226- Lower oil duct；The upper oil duct of 227-；230-damps outer lid；The outer lid sealing ring of 231-；240-hydraulic cylinder epicoele；Under 241-hydraulic cylinder Chamber；

3-stroke control mechanism；301-stroke adjustment nut；302-stroke fastening screw nut；310-idle stroke stop collar； 311-idle stroke adjusts cushion block；312-idle stroke cushion pad；The fixing blind nut of 313-regulation；314-inner seal ring；315-gag lever post Interior blind nut.

Detailed description of the invention

Below in conjunction with Figure of description and specific embodiment, present invention is described in detail:

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

Also include the damping mechanism 2 being arranged in cylinder body 1, be connected to the cylinder piston 110 of damping mechanism 2 and wear It is located at the stroke control mechanism 3 in cylinder head 106 medium pore of upper end, and, the damping draw-bar 202 in damping mechanism 2 passes Idle stroke stop collar 310 in stroke adjustment system 3, and by the fixing blind nut 313 of regulation and stroke adjustment nut 301 and null Journey stop collar 310 is the most together.

In the present embodiment, the inwall of described cylinder body 1, the damping outer wall of outer tube 210 and cylinder piston 110 times Lower chamber of air cylinder 121, the inwall of cylinder body 1, the outer wall of damping draw-bar 202 and cylinder piston 110 upper end is formed between end face Upper chamber of air cylinder 120, the damping inwall of outer tube 210, the outer wall of damping draw-bar 202 and damping piston 220 upper end is formed between face Form hydraulic cylinder epicoele 240 between face, between inwall and damping piston 220 lower surface of damping outer tube 210, form hydraulic cylinder Cavity of resorption 241, the top of described cylinder body 1, the bottom of cylinder body 1 are respectively equipped with and make upper chamber of air cylinder 120, lower chamber of air cylinder 121 It is in communication with the outside to pass in and out the first air inlet/outlet of gas, the second air inlet/outlet respectively, described 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, described damping mechanism 2 includes damping outer tube 210, the external screw thread of described damping outer tube 210 upper end Screwing up in the internal thread hole being arranged on 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 female thread root and damping outer tube 210 end is formed, puts down with the air pressure on cylinder piston 110 Weighing apparatus hole 112 communicates, and plays the effect of balance oil sealing 201 top air pressure.

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

In the present embodiment, the lower end of the damping draw-bar 202 in described damping outer tube 210 becomes screw shaped, screws up in damping In the internal thread hole of piston 220, between damping draw-bar 202 and damping piston 220, it is provided with spacing wire loop 224, damping piston 220 central authorities have and oppress equipped with one-way valve spring 221 and check valve hoodle 222 bottom unidirectional oil duct 225 and damping draw-bar 202, single To oil duct 225, other to have a hole slot be lower oil duct 226, and damping piston 220 laterally has upper oil duct 227, can with unidirectional oil duct 225 and under Oil duct 226 communicates, and upper oil duct 227, unidirectional oil duct 225 and lower oil duct 226 form oil duct, and damping piston 220 top becomes circular Be provided with a flat position, convenient when installing spanner be inserted in use, also the same with oil duct can pass through hydraulic oil；The upper end of damping draw-bar 202 Becoming screw shaped, head has a flat position, and when facilitating mounting and adjusting, spanner is inserted in and turns, and damping draw-bar 202 is through oil sealing 201 and is contained 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 encountering spacing back-up ring 211, damping piston 220 are pushed into the lower surface encountering spacing back-up ring 211, the upset of damping outer tube 210 position, allow to fill damping the one of outer lid 230 End upward, fills hydraulic oil, outer for the damping being set with outer tube lid sealing ring 231 lid 230, seals and screws up at damping outer tube In the female thread of 210, after damping outer tube 210 is linked to be an entirety with the outer lid 230 of damping, profile and effect and traditional damping Pull bar 202 does not has difference；Because as long as damping draw-bar 202 damping piston 220 of ining succession 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 the sectional area ratio hydraulic cylinder cavity of resorption 241 of hydraulic cylinder epicoele 240 Little, and the isolation of the two chamber and extraneous air has been further filled with hydraulic oil, and during running of hydraulic power oil, volume is the most constant, institute With, where no matter damping piston 220 rest on, oil sealing 201 all can automatic sliding to hydraulic cylinder upper and lower cavity add up to overall On long-pending constant position, promote damping draw-bar 202, make the damping piston 220 ined succession advance to lower surface and encounter the outer lid of damping 230 upper surface time, oil sealing 201 slides to highest point, and oil sealing 201 upper surface is designed as not exposing the top of damping outer tube 210.

In the present embodiment, described stroke control mechanism 3 includes the step being arranged in cylinder head 106 medium pore of upper end The idle stroke stop collar 310 of shaft-like, the small diameter position, upper end 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 of the stepped hole being positioned at 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 screw thread end face press against Inner seal ring 314 screws up on idle stroke stop collar 310；Stroke adjustment nut 301 is a flange nut, the fixing blind nut of regulation 313 flanges overlapping stroke adjustment nut 301 screw up on the external screw thread of idle stroke stop collar 310, the fixing blind nut 313 of regulation 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 regulation Fixing blind nut 313 is matched in clearance, can be freely rotatable after dress.Damping draw-bar 202 in damping mechanism 2 slides 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 nut and tight after, become an entirety with damping draw-bar 202 and the part ined succession, can be at idle stroke stop collar 310 In hole freely rotatable；On the external diameter of idle stroke stop collar 310, slide and be equipped with idle stroke cushion pad 312 and some pieces because of null The spacing needs of length of journey and stacked the idle stroke of position-limiting action and adjusted cushion block 311, position is in and is clipped in cylinder head 106 And between the fixing blind nut 313 of regulation.

In the present embodiment, described cylinder piston 110 there is no different from the structural principle of tradition cylinder piston, and they are different Part is: cylinder piston 110 central authorities have the one end in step-like hole to have can hold the position of blind nut 315 flange in gag lever post, i.e. When 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, damping draw-bar 202 stage casing slides through sealing ring 111, convenient to damping outside Hydraulic oil in pipe seals；

Specific implementation process: before startup, connects source of the gas, power supply, controlling organization and external part by cylinder.

The length of operating and setting damping draw-bar idle stroke work: rest on as in figure 2 it is shown, cylinder piston 110 is arranged Upper end i.e. initial position, Magnetic Induction switch 102 is adjusted to sense the cylinder magnet ring obtaining being arranged on cylinder piston 110 The position of 105；Adjust the height of cushion block 311 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 stack, and are equivalent at initial position, are provided with the fixing blind nut of adjustment 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 It is screwed onto required height, i.e. adjust the upper plane distance to spacing back-up ring 211 lower plane of damping piston 220, 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 to be also adjusted to accordingly Cylinder magnet ring 105 can sense the place obtained.

Begin to use, activate switch, regulate valve union A 101 air inlet, regulate valve union B 104 aerofluxus, cylinder piston 110 Front and back chamber is because forming draught head band dynamic damping outer tube 210 and the outer lid 230 of damping linked together and outer lid sealing ring 231 Quickly move down；Damping piston 220 is because being connected to or be 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, the fixing blind nut 313 of regulation, idle stroke are spacing Blind nut 315 and inner seal ring 314 in set 310, gag lever post, because being enclosed within damping piston 220 sealing ring 223 above and damping outer tube 210 exist frictional resistance, and above part the most quickly moves down also with damping outer tube 210.

When the fixing 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 connected together halt；As it is shown on figure 3, now, cylinder piston 110 Continue band dynamic damping outer tube 210 descending, because damping piston 220 remains stationary as, cause the hydraulic oil pressurized of hydraulic cylinder epicoele 240 to lead to Upper oil duct 227 and the lower oil duct 226 of overdamp piston 220 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 is to consistent with spring force direction, unidirectional oil duct 225 is made by check valve With being in closedown, do not pass through hydraulic oil；The aperture of lower oil duct 226 sets less, hydraulic oil by time be obstructed, slow down outside damping The front line speed of pipe 210, damping cylinder enters the hydraulic damping state of impulse stroke.

Because the sectional area of the sectional area ratio hydraulic cylinder cavity of resorption 241 of hydraulic cylinder epicoele 240 is little, and the two chamber is filled with liquid Force feed, during running of hydraulic power oil, volume is the most constant, and in the environment of isolation air, the cumulative volume in the two chamber is also the most constant, So, when damping outer tube 210 is descending oil sealing 201 can Automatic-descending and remaining be in that the upper and lower chamber of hydraulic cylinder adds up to overall On long-pending constant position, owing to the passage of equilibrium air pressure is arranged at oil sealing 201 top, oil sealing 201 slides up and down the most not by effects of air pressure.

Because damping oil hole size is constant, pre-adjust regulation valve union A 101 and regulation valve union B 104 and be adjustable into aerofluxus The size in hole, can control cylinder intake and exhaust amount size in the unit interval, make damping outer tube 210 overcome damping force to become when moving ahead Can soon or slow, thus reach to have adjusted what damping draw-bar 202 stretched out in certain scope and in the case of damping Speed, i.e. reaches to adjust the purpose of 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 make regulation valve union B 104 air inlet to lower chamber of air cylinder 121, upper chamber of air cylinder 120 Air from regulation valve union A 101 aerofluxus, 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 with connect part quickly to initial position direction return；Equally because being enclosed within damping piston 220 sealing ring above 223 and the frictional resistance that exist of damping outer tube 210, in succession or the part of successively damping piston 220 is 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 being arranged in cylinder head 106 During lid cushion pad 107, be obstructed stopping return, and cylinder piston 110 continues to just with damping outer tube 210 part such as grade connected together Beginning locality return, a hydraulic oil pressurized part for hydraulic cylinder cavity of resorption 241 along former passage rework solution cylinder pressure epicoele 240, because of Hydraulic oil flow at this time is in opposite direction with one-way valve spring 221 elastic force, and the design of one-way valve spring 221 elastic force is less, hydraulic pressure Oil pressure enough opens the check valve hoodle 222 withstanding unidirectional oil duct 225, so, major part hydraulic oil leads to from unidirectional oil duct 225 Cross oil duct 227 and enter hydraulic cylinder epicoele 240, oil sealing 201 and descending time same principle also self-return, until stroke knot Bundle, Magnetic Induction switch 102 senses cylinder magnet ring 105 and works, and link external control electrical equipment, and air inlet stops, and hydraulic pressure hinders One cycle of operation of Buddhist nun's cylinder terminates.

The object, technical solutions and advantages of the present invention are further described by above-listed preferred embodiment, are answered It is understood by, the foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims

1. a damping cylinder for range-adjustable, including cylinder body (1), it is characterised in that: described cylinder body wears in (1) Having damping mechanism (2), the upper connection of described damping mechanism (2) has the cylinder piston (110) being located in cylinder body (1), described resistance Buddhist nun mechanism (2) moves with the motion of cylinder piston (110), and damping mechanism (2) includes that damping draw-bar (202), described damping draw Bar (202) connects has stroke control mechanism (3) to realize the scalable of damping mechanism (2) stroke.

The damping cylinder of range-adjustable the most according to claim 1, it is characterised in that: described damping mechanism (2) also includes It is located on the damping outer tube (210) of damping draw-bar (202) periphery, is arranged on the damping piston of damping draw-bar (202) end (220), described damping piston (220) is 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), described damping outer tube (210) is connected and by cylinder piston with cylinder piston (110) (110) driving up and down motion, described damping draw-bar (202), damping outer tube (210) are the most coaxially movably set in cylinder body (1) In, the lower end of damping outer tube (210) is enclosed construction.

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

The damping cylinder of range-adjustable the most 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) upwards carries out axially-movable in order to limit damping piston (220) the spacing back-up ring (211) of shift position.

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

The damping cylinder of range-adjustable the most according to claim 1, it is characterised in that: described stroke control mechanism (3) wraps Include the idle stroke stop collar (310) of the step shaft-like being arranged in cylinder body (1) top, the upper end of idle stroke stop collar (310) The fixing blind nut (313) of the regulation that is spirally connected, is provided with stepped hole along axial line in idle stroke stop collar (310), is positioned at the stepped hole of lower end Blind nut (315) in the gag lever post that the flange that is spirally connected is step-like, in described gag lever post, blind nut (315) is provided with coaxial through-hole along axial line, In described gag lever post, the upper surface of blind nut (315) is provided with inner seal ring (314) and screws up and be arranged on idle stroke stop collar (310) On；Described regulation is fixed and is set with stroke adjustment nut (301) between blind nut (313) and idle stroke stop collar (310), and stroke is adjusted Joint nut (301) is flange nut, and the fixing blind nut (313) of regulation is provided with flange, and the lower surface of the fixing blind nut (313) of regulation is tight Press against the upper surface of idle stroke stop collar (310), the banjo clip of stroke adjustment nut (301) is at the fixing blind nut (313) of regulation Between the upper surface of flange and idle stroke stop collar (310), between stroke adjustment nut (301) and the fixing blind nut (313) of regulation are Gap coordinates so that stroke adjustment nut (301) can be freely rotatable；Described damping draw-bar (202) slides through blind nut in gag lever post (315) coaxial through-hole in and the stepped hole in idle stroke stop collar (310) and then screw up peace with stroke adjustment nut (301) Dress, described stroke adjustment nut (301) is connected the entirety of composition with damping draw-bar (202) can be in idle stroke stop collar (310) In hole freely rotatable.

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

The damping cylinder of range-adjustable the most according to claim 6, it is characterised in that: described idle stroke stop collar (310) Periphery movable sleeve the most successively 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).