CN207975065U - A kind of axial direction hydrostatic support buffering hydraulic cylinder - Google Patents

A kind of axial direction hydrostatic support buffering hydraulic cylinder Download PDF

Info

Publication number
CN207975065U
CN207975065U CN201721829553.3U CN201721829553U CN207975065U CN 207975065 U CN207975065 U CN 207975065U CN 201721829553 U CN201721829553 U CN 201721829553U CN 207975065 U CN207975065 U CN 207975065U
Authority
CN
China
Prior art keywords
cylinder
chamber
cushion chamber
cushion
plunger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201721829553.3U
Other languages
Chinese (zh)
Inventor
袁兵
李雪萌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan University of Technology WUT
Original Assignee
Wuhan University of Technology WUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan University of Technology WUT filed Critical Wuhan University of Technology WUT
Priority to CN201721829553.3U priority Critical patent/CN207975065U/en
Application granted granted Critical
Publication of CN207975065U publication Critical patent/CN207975065U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model is related to hydraulic cylinder cushion bumper technical fields, refer specifically to a kind of axial hydrostatic support buffering hydraulic cylinder;Including cylinder body, buffering cylinder cap can be equipped with along the piston and piston rod of its inner cavity one reciprocating action, the rear end of the cylinder body by being equipped in cylinder body, and cushion dashpot is covered equipped with cushion chamber, cushion chamber is connected to and is arranged concentrically with inner chamber of cylinder block, and the rear end of piston rod is equipped with the plunger coordinated with cushion chamber;The bottom surface of the cushion chamber is equipped with static pressure chamber, buffers the pressurized hole for offering connection static pressure chamber on the rear end face of cylinder cap, static pressure supporting device is connected on pressurized hole;The utility model is reasonable for structure, the pipeline that throttles constitutes first-level buffer when backward stroke of the piston, the clearance fit of plunger and cushion chamber constitutes level 2 buffering, the pressure cooperation booster pump of static pressure intracavitary generates a reversed fluid dynamic, the backhaul inertia for eliminating piston rod avoids plunger and buffers the direct collision of cylinder cap, has good buffer effect, it operates steadily, hydraulic cylinder service life can be improved.

Description

A kind of axial direction hydrostatic support buffering hydraulic cylinder
Technical field
The utility model is related to hydraulic cylinder cushion bumper technical fields, refer specifically to a kind of axial hydrostatic support buffering hydraulic Cylinder.
Background technology
Hydraulic drive and its control technology are widely used with its exclusive advantageous properties in machinery industry, and hydraulic cylinder is then It is that element most-often used in hydraulic technique is moved back and forth with realizing, however hydraulic cylinder is often lived when moving to stroke end Plug terminal can reach higher speed, under the action of inertia force and hydraulic coupling, mechanical collision can be generated with cylinder bottom, to produce Raw impact vibration and noise, have adverse effect on entire hydraulic system, reduce itself service life.Traditional buffering oil Cylinder is all made of the mode that buffer head is inserted into cushion hole, and the formation and throttling of high-pressure buffer chamber, Jin Ershi are realized by fit clearance The buffering of existing oil cylinder.But this mode can not still avoid the contact-impact of piston rod and cylinder bottom at the end of the stroke, to shadow Ring the cushion performance and service life of oil cylinder.Therefore, the existing technology needs to be improved and developed.
Utility model content
The purpose of this utility model is that in view of the drawbacks of the prior art and insufficient, provide a kind of reasonable for structure, can avoid Contact-impact when piston, piston rod backhaul between cylinder body, cushion performance is good, service life length, stable axial static Hydraulic support buffering hydraulic cylinder.
To achieve the goals above, the utility model uses following technical scheme:
A kind of axial hydrostatic support buffering hydraulic cylinder described in the utility model, including cylinder body, interior be equipped with of cylinder body can be along it The rear end of the piston and piston rod of inner cavity one reciprocating action, the cylinder body is equipped with buffering cylinder cap, and cushion dashpot is covered equipped with buffering Chamber, cushion chamber are connected to and are arranged concentrically with inner chamber of cylinder block, and the rear end of piston rod is equipped with the plunger coordinated with cushion chamber;The buffering The bottom surface of chamber is equipped with static pressure chamber, buffers the pressurized hole for offering connection static pressure chamber on the rear end face of cylinder cap, is connected on pressurized hole There is static pressure supporting device.
According to above scheme, fuel feed hole is offered in the one side wall of the buffering cylinder cap, it is slow that fuel feed hole inner end is equipped with connection The first check valve of chamber is rushed, cushion dashpot is covered equipped with throttling pipeline, and another side wall in buffering cylinder cap is arranged in throttling pipeline one end And be connected to cushion chamber, the other end for the pipeline that throttles is connected to fuel feed hole.
According to above scheme, the internal diameter of the throttling pipeline is less than the internal diameter of fuel feed hole.
According to above scheme, the outer diameter of the plunger is less than the internal diameter of cushion chamber and the two composition is slidably matched, and plunger is long Depth of the degree more than cushion chamber.
According to above scheme, the static pressure supporting device includes booster pump, and booster pump is connected by pressure piping and pressurized hole It connects and pressure piping is equipped with the second check valve.
According to above scheme, the pressure piping between second check valve and booster pump is equipped with damper.
According to above scheme, overflow valve is parallel on the pressure piping between the booster pump and damper.
The utility model has the beneficial effect that:The utility model is reasonable for structure, and throttling pipeline constitutes level-one when backward stroke of the piston The clearance fit of buffering, plunger and cushion chamber reduces the constitution level 2 buffering in throttling pipeline, and the pressure of static pressure intracavitary Coordinate booster pump to generate a reversed fluid dynamic, eliminates the backhaul inertia of piston rod, and in plunger end face and cushion chamber bottom Manufacture isolation oil film between face, avoids plunger and buffers the direct collision of cylinder cap, have good buffer effect, operate steadily, can carry High hydraulic cylinder service life.
Description of the drawings
Fig. 1 is the whole cross-sectional view of the utility model;
Fig. 2 is A-A schematic cross-sectional views in Fig. 1.
In figure:
1, cylinder body;2, cylinder cap is buffered;3, static pressure supporting device;11, piston;12, piston rod;13, plunger;21, cushion chamber; 22, static pressure chamber;23, pressurized hole;24, fuel feed hole;25, the first check valve;26, throttle pipeline;31, booster pump;32, second is unidirectional Valve;33, damper;34, overflow valve.
Specific implementation mode
The technical solution of the utility model is illustrated with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of axial hydrostatic support buffering hydraulic cylinder described in the utility model, including cylinder body 1, cylinder body 1 Interior be equipped with can be equipped with buffering cylinder cap 2 along the piston 11 and piston rod 12 of its inner cavity one reciprocating action, the rear end of the cylinder body 1, It buffers cylinder cap 2 and is equipped with cushion chamber 21, cushion chamber 21 is connected to and is arranged concentrically with 1 inner cavity of cylinder body, and the rear end of 11 bar of piston is equipped with The plunger 13 coordinated with cushion chamber 21;The bottom surface of the cushion chamber 21 is equipped with static pressure chamber 22, buffers and is opened on the rear end face of cylinder cap 2 Equipped with the pressurized hole 23 for being connected to static pressure chamber 22, static pressure supporting device 3 is connected on pressurized hole 23;The piston 11 is lived in backhaul The plunger 13 of 12 rear end of stopper rod enters cushion chamber 21, and plunger 13 and the composition buffering throttle structure that is slidably matched of cushion chamber 21 are formed First-level buffer, when plunger 13 reaches 21 bottom of cushion chamber, 13 rear end face of plunger is formed with 21 bottom surface of cushion chamber around static pressure chamber 22 Sealing ring, static pressure supporting device 3 generates internal pressure, this pressure and 21 volume of cushion chamber in the static pressure chamber 22 by pressurized hole 23 The high pressure that reduction generates forms the retrograde fluid pressures to plunger 13, to eliminate inertia force when backward stroke of the piston;Static pressure chamber 21 Interior pressure offsets backward stroke of the piston inertia in peak value, is filled in the sealing ring gap that plunger 13 at this time is constituted with 21 bottom surface of cushion chamber The oil film for denounceing hydraulic oil to be generated under high pressure effect avoids plunger 13, piston rod 12, piston 11 and cylinder body 1, buffering cylinder cap 2 contact-impact improves the work smoothness of hydraulic cylinder, good buffer effect.
Fuel feed hole 24 is offered in the one side wall of the buffering cylinder cap 2,24 inner end of fuel feed hole is equipped with connection cushion chamber 21 First check valve 25, buffering cylinder cap 2 are equipped with throttling pipeline 26, and 26 one end of throttling pipeline is arranged in the other side of buffering cylinder cap 2 It wall and is connected to cushion chamber 21, the other end of throttling pipeline 26 is connected to fuel feed hole 24;The hydraulic oil in stroke of the piston 11 Enter 1 inner cavity of cylinder body along cushion chamber 21 from the first check valve 25 of fuel feed hole 24, the pressure at 26 both ends of pipeline that throttle at this time is consistent; Plunger 13 enters cushion chamber 21 when 11 backhaul of piston, and the closing of the first check valve 25 makes straight between 1 inner cavity of cylinder body and fuel feed hole 24 Connection road disconnects, and hydraulic oil can only be discharged from throttling pipeline 26 via fuel feed hole 24, and throttling pipeline 26 is small with bore, circuit is long Feature reduce inertia force when 11 backhaul of piston to constitute level-one throttling buffering effect.
The internal diameter of the throttling pipeline 26 is less than the internal diameter of fuel feed hole 24, and throttling pipeline 26 is along buffering cylinder cap 2 around buffering Chamber 21 is arranged, and to provide elongated hydraulic oil passing away connection 1 inner cavity of cylinder body and fuel feed hole 24, passes through oil outlet passage Relative aperture scaling variation generate pressure constituted first-level buffer to offset 11 backhaul inertia force of piston.
The outer diameter of the plunger 13 is less than the internal diameter of cushion chamber 21 and the two composition is slidably matched, and 13 length of plunger is more than slow The depth of chamber 21 is rushed, the oil extraction between the cushion chamber 21 and the size gap composition cushion chamber 21 and fuel feed hole 24 of plunger 13 is logical Road, plunger 13 after 26 other end of pipeline that throttles, make oil outlet passage gap further reduce to constitute two in backhaul stroke Grade buffering.
The static pressure supporting device 3 includes booster pump 31, and booster pump 31 is connect and increased with pressurized hole 23 by pressure piping Pressure pipe road is equipped with the second check valve 32;Pressure piping between second check valve 32 and booster pump 31 is equipped with damper 33;The booster pump 31 is normally opened setting to provide a pressure in cushion chamber 21 always in 11 stroke of piston or backhaul Power, when hydraulic oil when fuel feed hole 24 enters cushion chamber 21 via the first check valve 25 stroke, at this time fuel feed hole piston 11 24 one end are equal with the throttling pressure of 26 other end of pipeline, and hydraulic oil will not be flowed from throttling pipeline 26, and booster pump 31 is to live It fills in 11 strokes and power is provided;When 11 return of piston, plunger 13 enters 21 front port of cushion chamber, and the first check valve 25 is closed, liquid Pressure oil is discharged via fuel feed hole 24 from throttling pipeline 26 and generates first-level buffer effect, when plunger 13 is by throttling 26 other end of pipeline When with the communication port of cushion chamber 21, gap forms oil outlet passage, structure with throttling pipeline 26 between 13 outer rim of plunger and cushion chamber 21 The level 2 buffering to throttle at gap;When 13 backhaul of plunger is to close to 21 bottom of cushion chamber, 13 rear end face of plunger and cushion chamber 21 Bottom surface constitutes the sealing ring around static pressure chamber 21, and the gap of the sealing ring is connected to the throttle passage of level 2 buffering and is therefore full of Oil film, pressure of the plunger 13 in backhaul in cushion chamber 21 increases in regularity, therefore the pressure of the static pressure chamber 21 in sealing ring Strength coordinates the pressure that booster pump 31 provides to generate a reversed fluid dynamic in static pressure chamber 21 and acts in peak value Plunger 13 eliminates inertia force and hydraulic coupling when 11 backhaul of piston, avoid piston 11, piston rod 12, plunger 13 and cylinder body 1 and The direct shock between cylinder cap 2 is buffered, three-level buffering effect is played.
Overflow valve 34 is parallel on pressure piping between the booster pump 31 and damper 33.
The above description is only a preferred embodiment of the present invention, therefore all according to described in the utility model patent application range The equivalent change or modification done of structure, feature and principle, be included in the scope of the utility model patent application.

Claims (7)

1. a kind of axial direction hydrostatic support buffering hydraulic cylinder, including cylinder body (1), interior be equipped with of cylinder body (1) can be integrally reciprocal along its inner cavity The piston (11) and piston rod (12) of action, it is characterised in that:The rear end of the cylinder body (1) is equipped with buffering cylinder cap (2), cushion dashpot It covers (2) and is equipped with cushion chamber (21), cushion chamber (21) is connected to and is arranged concentrically with cylinder body (1) inner cavity, the rear end of piston (11) bar Equipped with the plunger (13) coordinated with cushion chamber (21);The bottom surface of the cushion chamber (21) is equipped with static pressure chamber (22), buffers cylinder cap (2) pressurized hole (23) of connection static pressure chamber (22) is offered on rear end face, pressurized hole is connected with static pressure supporting device on (23) (3)。
2. axial direction hydrostatic support buffering hydraulic cylinder according to claim 1, it is characterised in that:The buffering cylinder cap (2) Fuel feed hole (24) is offered in one side wall, fuel feed hole (24) inner end is equipped with the first check valve (25) of connection cushion chamber (21), delays Rush cylinder cap (2) and be equipped with throttling pipeline (26), the setting of throttling pipeline (26) one end buffering cylinder cap (2) another side wall and with it is slow Chamber (21) connection is rushed, the other end of throttling pipeline (26) is connected to fuel feed hole (24).
3. axial direction hydrostatic support buffering hydraulic cylinder according to claim 2, it is characterised in that:The throttling pipeline (26) Internal diameter is less than the internal diameter of fuel feed hole (24).
4. axial direction hydrostatic support buffering hydraulic cylinder according to claim 1, it is characterised in that:The outer diameter of the plunger (13) Internal diameter and the two composition less than cushion chamber (21) is slidably matched, and plunger (13) length is more than the depth of cushion chamber (21).
5. according to any axial hydrostatic support buffering hydraulic cylinders of claim 1-4, it is characterised in that:The static pressure support Device (3) includes booster pump (31), and booster pump (31) is connect with pressurized hole (23) by pressure piping and pressure piping is equipped with Second check valve (32).
6. axial direction hydrostatic support buffering hydraulic cylinder according to claim 5, it is characterised in that:Second check valve (32) Pressure piping between booster pump (31) is equipped with damper (33).
7. axial direction hydrostatic support buffering hydraulic cylinder according to claim 6, it is characterised in that:The booster pump (31) and resistance Overflow valve (34) is parallel on pressure piping between Buddhist nun's device (33).
CN201721829553.3U 2017-12-25 2017-12-25 A kind of axial direction hydrostatic support buffering hydraulic cylinder Expired - Fee Related CN207975065U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721829553.3U CN207975065U (en) 2017-12-25 2017-12-25 A kind of axial direction hydrostatic support buffering hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721829553.3U CN207975065U (en) 2017-12-25 2017-12-25 A kind of axial direction hydrostatic support buffering hydraulic cylinder

Publications (1)

Publication Number Publication Date
CN207975065U true CN207975065U (en) 2018-10-16

Family

ID=63771875

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721829553.3U Expired - Fee Related CN207975065U (en) 2017-12-25 2017-12-25 A kind of axial direction hydrostatic support buffering hydraulic cylinder

Country Status (1)

Country Link
CN (1) CN207975065U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110848196A (en) * 2019-11-28 2020-02-28 河南航天液压气动技术有限公司 Hydraulic control valve
CN111425484A (en) * 2020-04-17 2020-07-17 河海大学常州校区 Oil cylinder tail end buffering device
CN111425483A (en) * 2020-04-17 2020-07-17 河海大学常州校区 Oil cylinder tail end buffering device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110848196A (en) * 2019-11-28 2020-02-28 河南航天液压气动技术有限公司 Hydraulic control valve
CN110848196B (en) * 2019-11-28 2021-11-23 河南航天液压气动技术有限公司 Hydraulic control valve
CN111425484A (en) * 2020-04-17 2020-07-17 河海大学常州校区 Oil cylinder tail end buffering device
CN111425483A (en) * 2020-04-17 2020-07-17 河海大学常州校区 Oil cylinder tail end buffering device

Similar Documents

Publication Publication Date Title
CN207975065U (en) A kind of axial direction hydrostatic support buffering hydraulic cylinder
CN103438050B (en) The cylinder apparatus cushioned after a kind of off-load
EP1975453A3 (en) Damping force adjustable fluid pressure shock absorber
CN106593852A (en) Port plate structure of three-oil hole axial plunger pump
CN203441863U (en) Oil cylinder device capable of achieving buffering after unloading
CN204942154U (en) A kind of pressurizing cylinder of tool New Buffering structure
CN103953678B (en) One automatically resets hydraulic damping device
CN201391511Y (en) Hydraulic cylinder cushioning device
CN106151167A (en) Hydraulic Double bumper post plug cylinder
EP1881227A3 (en) Shock absorber
CN208935063U (en) A kind of hydraulic cylinder buffer structure
CN205669520U (en) buffering structure of hydraulic cylinder
CN203098715U (en) Novel hydraulic damper
CN205117887U (en) Hydraulic cylinder is ground immediately to unsteady buffering of pulling force
CN210889558U (en) Spring type buffer structure of oil cylinder and oil cylinder
CN205578596U (en) Improved generation atmospheric pressure damping piston and use its atmospheric pressure damping bumper shock absorber
CN204127025U (en) A kind of novel hydraulic piston assembly
CN205277991U (en) A buffer structure device for spiral rotary actuator
CN209493285U (en) Fork truck buffer lift oil cylinder
CN201296938Y (en) Large arm oil cylinder of excavator
CN203308822U (en) Hydraulic cylinder
CN105782160A (en) Single-rod inlet and outlet bi-direction equal-load hydraulic cylinder
CN102536957A (en) Pneumatic/hydraulic cylinder with buffering mechanism
CN206958369U (en) Intelligent hydraulic control twin-tub actuator
CN105465098A (en) Buffer structure device used for spiral swing hydraulic cylinder

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20181016

Termination date: 20181225

CF01 Termination of patent right due to non-payment of annual fee