CN108533563A - A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw - Google Patents
A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw Download PDFInfo
- Publication number
- CN108533563A CN108533563A CN201810440489.2A CN201810440489A CN108533563A CN 108533563 A CN108533563 A CN 108533563A CN 201810440489 A CN201810440489 A CN 201810440489A CN 108533563 A CN108533563 A CN 108533563A
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- Prior art keywords
- screw
- ball
- hydraulic cylinder
- locking
- piston rod
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- 238000007789 sealing Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims 2
- 230000006870 function Effects 0.000 claims 1
- 230000011218 segmentation Effects 0.000 claims 1
- 230000035807 sensation Effects 0.000 claims 1
- 238000003754 machining Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Braking Arrangements (AREA)
- Actuator (AREA)
Abstract
A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw, the solution is to the technical problems that self locking hydraulic cylinder reliable lock is poor in the market outside Current Domestic, damages inner wall of cylinder or piston rod etc..Include that cylinder barrel, cylinder cap, cylinder bottom, piston, piston rod and locking assembly and cylinder bottom leading screw rotate auxilitary unit on the hydraulic cylinder structure；Bore the coaxial aperture more than hydraulic cylinder travel length there are one depth in the piston rod tail portion, ball-screw is assembled, feed screw nut forms complex with piston, several logical oily oilholes are drilled on the periphery of piston rod tail portion, bar inner cavity is punched using machining, oil-through-hole quantity and branch's situation required design；The ball-screw end of thread is placed in piston rod, is coordinated with feed screw nut, and the other end stretches out cylinder bottom；Using flange or key connection braking disc outside the cylinder bottom rotation auxilitary unit, it is used cooperatively with brake callipers；Hydraulic cylinder provided by the present invention can realize that self-locking is stablized in any position.
Description
Technical field
The invention belongs to hydraulic cylinder technical field, on the basis of common double acting hydraulic cylinder, innovative design machinery from
Latch mechanism in any position of hydraulic cylinder travel so that it can lock piston rod.
Background technology
Hydraulic cylinder is the equipment for driving output power by hydraulic oil, is mainly made of cylinder barrel, piston.Inner cavity of cylinder is closed,
Piston is mounted on inner cavity of cylinder with sliding matching mode and inner cavity of cylinder is separated into two cavitys.When hydraulic cylinder works, a chamber
Body oil inlet, another cavity oil return, you can push piston and piston rod movement, do work.
Hydraulic cylinder has many advantages, such as big power-mass ratio, compact-sized, stable working, overload protection, in military, civilian work
It is all widely used in industry.For hydraulic cylinder in certain operative scenarios, piston rod, which needs to be maintained at for a long time, reaches a certain position
State, therefore, it is necessary to a kind of hydraulic cylinders having self-lock ability to meet above-mentioned function needs, and ensure to use safely.
As a kind of hydraulic system executive component, it should bear in movement and locking compared with big load self locking hydraulic cylinder,
Accurate positioning function is required again, and determining for more certain accuracy rating may be implemented in traditional protective voltage type self locking hydraulic cylinder
Position, but valve port and piston etc. mostly can generate leakage, the generation of leakage with the passage of working time and the increase of service load
Oil cylinder can be caused " soft leg " phenomenon occur, positioning accuracy deviation is made to increase, even extremely small leakage and infiltration can all be led
Production work is caused not to be smoothed out normally.
No matter all kinds of self locking hydraulic cylinders ensure that upper or production is diversified in technology at this stage cannot all meet city well
Field demand.As frictionally realizes the hydraulic cylinder of locking function, that there are coupling mechanism forces is small, frictional dissipation is fast, manufacture difficulty is high, work
The deficiencies of unstable, other most mechanical interlocking modes all only rest on theoretic, it is difficult to implement, feasibility it is low, it can be achieved that
It spends small；The hydraulic cylinder of cylinder external screw thread self-locking there is also structures it is not compact enough, synchronous control is difficult the problems such as.
Invention content
Defect present in scheme for the above-mentioned prior art, the present invention overcomes the deficiencies in the prior art, provide one kind
Self-locking device is mounted on outside cylinder tail, with the mechanical self-locking hydraulic cylinder that ball-screw main core, nut auxiliary piston are combined in cylinder, is protected
It may be implemented to stablize holding while self-locking when confirmation.
The present invention is achieved by the following technical programs：
A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw, including cylinder barrel, cylinder cap, cylinder bottom, piston, piston rod and
Lock assembly, cylinder barrel both ends are fixedly connected with cylinder bottom and cylinder cover bolt respectively, the piston being slidably installed in cylinder barrel with
Piston rod one end is fixedly connected, and the piston rod other end stretches out front end housing, and hydraulic cylinder left chamber is rodless cavity, and right chamber is rod chamber；It is living
The left end of stopper rod is opened there are one the coaxial aperture for being more than hydraulic cylinder travel length, and piston rod left end end connects ball-screw nut；If
One and the matched ball-screw of ball-screw nut are set, the ball-screw end of thread is packed into rod aperture, piston and nut
It is connected as one with embedded；The other end connect with cylinder bottom by two-direction thrust bearing and stretches out cylinder bottom, ball-screw and cylinder bottom
It is contactless；Thrust bearing fixes inner ring by ball-screw left end shoulder and sleeve, with fixing nut locking sleeve；Ball-screw
Left end end connects braking disc, and equipped with mating brake callipers, brake block；Oil pipe connects the oilhole on casing wall or cylinder cap, liquid
Cylinder pressure left chamber is connected to piston rod cavity by logical oily oilhole.
The technical principle of the present invention is that the larger axial force of piston rod is converted into ball-screw by ball-screw is smaller
Torque, then ball-screw is locked by disk type brake or other modes, to the self-locking for the hydraulic cylinder realized.Hydraulic cylinder is run
When, ball-screw is in the free rotation state that do not lock, and piston rod does not allow to rotate, since ball screw spiral lift angle is more than
Equivalent friction angle, at one end when fuel feeding, high pressure oil pushes the movement of nut piston complex, and ball-screw is driven by piston rod to be revolved
Turn；When hydraulic cylinder needs locking, the braking disc for clamping ball-screw is removed with brake callipers control two panels brake block, to reach
The accurate purpose positioned in real time.
Description of the drawings
Fig. 1 is a kind of main view section view of the external friction mechanical self-locking hydraulic cylinder based on ball-screw of the embodiment of the present invention
Figure.
Fig. 2 is the partial enlarged view that assembly is locked in Fig. 1.
Fig. 3 is that a kind of axis of external friction mechanical self-locking hydraulic cylinder based on ball-screw of the embodiment of the present invention surveys appearance
Figure.
Specific implementation mode
The embodiment of the present invention is described in further detail below in conjunction with description of the drawings, but the present embodiment is not used to limit
The system present invention.
As shown in Figure 1, a kind of external friction mechanical self-latching hydraulic pressure based on ball-screw that the embodiment of the present invention is provided
Cylinder, foundation include cylinder cap assembly 1, cylinder barrel 2, piston assembly 3, cylinder bottom assembly 4, lock assembly 5 and other zero attachmentes,
Assembly method is similar to Normal hydraulic cylinder.
As shown in Fig. 2, locking mechanical machine parts, including it is hollow piston rod 1, ball-screw nut 3, ball-screw 4, double
To thrust ball bearing 5, drilling cylinder bottom 6, end cap 7, braking disc 9, key 12 etc..
There are one the coaxial apertures that length is longer than hydraulic cylinder travel for 1 left end of piston rod brill；Feed screw nut 3 passes through welding side
Formula is mounted on 1 left end of piston rod, and feed screw nut is drilled with 3 oilholes 2 for 1 inner cavity of hydraulic oil disengaging piston rod.
The ball-screw 4 is that cylinder interior point carries threads of lead screw, is coordinated with ball-screw nut 3.
4 left end of the ball-screw is connect with double-direction thrust ball bearing 5, and right end positions load by shoulder, and left end is by sleeve
10 and nut 9 lock；5 right end of double-direction thrust ball bearing is positioned by cylinder bottom 6, and left end is locked by end cap 7；Seal felt is housed in end cap
Enclose 8 dust-proof and sealing lubricating oils.
4 left end of ball-screw installation braking disc 9 passes through key 12 by spring shim 10,11 axially position of nut
It is circumferentially positioned.
The operation principle of the embodiment of the present invention is as follows：When hydraulic cylinder is run, brake callipers control two panels brake block, which is in, to be put
Loose state, ball-screw 4 are in the free rotation state that do not lock, and piston rod 1 is installed by station and limited, do not allow to rotate,
It is higher against transmission efficiency since the frictional resistance moment of ball screw assembly, is smaller, it can not carry out self-locking, therefore fuel feeding at one end
When, nut piston complex is driven by high pressure oil, and piston rod generates movement tendency, and ball-screw 4 can be driven by piston rod 1 to be revolved
Turn, at this point, piston rod can move freely；When hydraulic cylinder needs locking, fuel cut-off, while being stopped with brake callipers control two panels
Vehicle piece goes to clamp the braking disc of ball-screw end, and ball-screw cannot rotate, and piston rod is locked, and keep fluid or discharge
Fluid can maintain self-locking state.
Claims (4)
1. a kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw, it is characterised in that：Include cylinder barrel, piston in structure
Assembly, drive end bearing bracket, tail portion Bored piston bar, piston rod or so segmentation, lock chambers oil extraction oilhole, ball-screw, ball-screw spiral shell
Female pair, double-direction thrust ball bearing, thread ending cover, sealing felt collar, sleeve, sleeve location nut, cylinder bottom；Cylinder barrel front end and drive end bearing bracket
It is fixedly connected using six roots of sensation bolt, cylinder barrel inner carrier is fixed on piston rod tail portion by nut, Place in the left segment trailer of piston rod
Groove, piston assembly are welded to connect for right section with piston rod, and left section of piston rod is matched with built-in thread lead screw is combined into ball-screw,
It is constrained by cylinder bottom assembly, thread lead screw external part is connected with brake disc and oil control brake, utilizes the rotary motion of ball-screw
Axial rub self-locking is converted to circumferential direction of the foundation on the external part brake disc of tail portion certainly by the principle mutually converted with linear motion
Lock, realizes the real-time self-locking purpose of the hydraulic cylinder.
2. the external friction mechanical self-locking hydraulic cylinder based on ball-screw as described in claim 1, it is characterised in that：Using ball
The principle of reciprocity of leading screw straight line and rotary motion is combined ball guide screw nat with piston, is realized self-locking, is made compact-sized.
3. the external friction mechanical self-locking hydraulic cylinder based on ball-screw as described in claim 1, it is characterised in that：Using thrust
Ball bearing or plane needle roller thrust bearing are combined with cylinder bottom assembly stablizes locking screw, the left external part of leading screw using key connection or
Flanged joint brake disc acts on brake disc the locking function for realizing the hydraulic cylinder with oil control brake.
4. the external friction mechanical self-locking hydraulic cylinder based on ball-screw as described in claim 1, it is characterised in that：Design oil extraction
Oilhole realizes the pressure balance of piston left chamber and piston rod cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810440489.2A CN108533563A (en) | 2018-05-10 | 2018-05-10 | A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810440489.2A CN108533563A (en) | 2018-05-10 | 2018-05-10 | A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108533563A true CN108533563A (en) | 2018-09-14 |
Family
ID=63477232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810440489.2A Pending CN108533563A (en) | 2018-05-10 | 2018-05-10 | A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108533563A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553088A (en) * | 2019-09-14 | 2019-12-10 | 四川普盛科技有限责任公司 | Hydraulic drive lead screw pair rotating device |
| CN112431812A (en) * | 2020-12-04 | 2021-03-02 | 徐州徐工液压件有限公司 | Lead screw displacement self-detecting hydraulic cylinder |
| CN114458657A (en) * | 2022-04-12 | 2022-05-10 | 恒宏智能装备有限公司 | Hydraulic cylinder and working position locking method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185539A (en) * | 1977-03-07 | 1980-01-29 | Andrew Stratienko | Locking device for hydraulic actuator |
| FR2602836A1 (en) * | 1986-09-03 | 1988-02-19 | Guillement Georges | Movement jacks with multiple and variable working strokes |
| IT9021119A0 (en) * | 1990-07-30 | 1990-07-30 | Univer Spa | PROGRAMMABLE, FLUID DRIVEN LINEAR ACTUATOR |
| EP0648942A1 (en) * | 1993-10-06 | 1995-04-19 | UNIVER S.p.A. | Linear pneumatic actuator with a reversible-action locking device |
| DE29720838U1 (en) * | 1997-11-25 | 1998-02-26 | Andexser, Lucie, 32584 Löhne | Working cylinder with integrated lifting brake |
| DE19633412A1 (en) * | 1996-08-19 | 1998-03-05 | Wolfram Sielemann | Pressure operated drive |
| US20020053205A1 (en) * | 2000-11-08 | 2002-05-09 | Moog Inc. | Motor-driven actuator with hydraulic force amplification |
| US20030089225A1 (en) * | 2001-09-25 | 2003-05-15 | Vep Automation S.R.L | Device for controlling the oscillation of the arm of a handling equipment of the swingable lever type |
| CN201972999U (en) * | 2011-02-16 | 2011-09-14 | 袁天钢 | Mechanical interlocking type oil cylinder |
| CN103775430A (en) * | 2013-11-15 | 2014-05-07 | 杜雨轩 | Spiral self-locking hydraulic cylinder |
| CN207333337U (en) * | 2017-08-04 | 2018-05-08 | 北京长宇利华液压系统工程设计有限公司 | A kind of tight anti-rotation hydraulic cylinder of random position mechanical lock |
| CN208518997U (en) * | 2018-05-10 | 2019-02-19 | 四川大学 | A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw |
-
2018
- 2018-05-10 CN CN201810440489.2A patent/CN108533563A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185539A (en) * | 1977-03-07 | 1980-01-29 | Andrew Stratienko | Locking device for hydraulic actuator |
| FR2602836A1 (en) * | 1986-09-03 | 1988-02-19 | Guillement Georges | Movement jacks with multiple and variable working strokes |
| IT9021119A0 (en) * | 1990-07-30 | 1990-07-30 | Univer Spa | PROGRAMMABLE, FLUID DRIVEN LINEAR ACTUATOR |
| EP0648942A1 (en) * | 1993-10-06 | 1995-04-19 | UNIVER S.p.A. | Linear pneumatic actuator with a reversible-action locking device |
| DE19633412A1 (en) * | 1996-08-19 | 1998-03-05 | Wolfram Sielemann | Pressure operated drive |
| DE29720838U1 (en) * | 1997-11-25 | 1998-02-26 | Andexser, Lucie, 32584 Löhne | Working cylinder with integrated lifting brake |
| US20020053205A1 (en) * | 2000-11-08 | 2002-05-09 | Moog Inc. | Motor-driven actuator with hydraulic force amplification |
| US20030089225A1 (en) * | 2001-09-25 | 2003-05-15 | Vep Automation S.R.L | Device for controlling the oscillation of the arm of a handling equipment of the swingable lever type |
| CN201972999U (en) * | 2011-02-16 | 2011-09-14 | 袁天钢 | Mechanical interlocking type oil cylinder |
| CN103775430A (en) * | 2013-11-15 | 2014-05-07 | 杜雨轩 | Spiral self-locking hydraulic cylinder |
| CN207333337U (en) * | 2017-08-04 | 2018-05-08 | 北京长宇利华液压系统工程设计有限公司 | A kind of tight anti-rotation hydraulic cylinder of random position mechanical lock |
| CN208518997U (en) * | 2018-05-10 | 2019-02-19 | 四川大学 | A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553088A (en) * | 2019-09-14 | 2019-12-10 | 四川普盛科技有限责任公司 | Hydraulic drive lead screw pair rotating device |
| CN112431812A (en) * | 2020-12-04 | 2021-03-02 | 徐州徐工液压件有限公司 | Lead screw displacement self-detecting hydraulic cylinder |
| CN114458657A (en) * | 2022-04-12 | 2022-05-10 | 恒宏智能装备有限公司 | Hydraulic cylinder and working position locking method thereof |
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