CN209041213U - A kind of two-stage hydraulic cylinder - Google Patents
A kind of two-stage hydraulic cylinder Download PDFInfo
- Publication number
- CN209041213U CN209041213U CN201821715679.2U CN201821715679U CN209041213U CN 209041213 U CN209041213 U CN 209041213U CN 201821715679 U CN201821715679 U CN 201821715679U CN 209041213 U CN209041213 U CN 209041213U
- Authority
- CN
- China
- Prior art keywords
- guide sleeve
- piston
- outer cylinder
- hydraulic cylinder
- cylinder
- 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.)
- Active
Links
Abstract
The utility model provides a kind of two-stage hydraulic cylinder, and the hydraulic cylinder includes: outer cylinder (1), piston (2), guide sleeve (3), drive end bearing bracket (4) and piston rod (5).The hydraulic cylinder of the utility model is when from the first oil inlet oil inlet and when rodless cavity drives piston motion, hydraulic cylinder rod chamber uses passive matrix principle, previous stage cavity oil liquid enters rear stage cavity by 3 inclined hole of guide sleeve and drives piston rod movement, realizes that synchronous actuation reduces actuation time；Piston cylinder diameters and bar diameter at different levels can be designed according to outer load movement control law, so as to realize complicated control law.Also, outer cylinder mandril and piston internal check valve device can eliminate hydraulic cylinder accumulated error.Drive end bearing bracket designs oblique angle and piston top rade stroke buffer unit, can reduce hydraulic pressure execution device hydraulic shock at the end of the stroke.
Description
Technical field
The utility model relates to hydraulic-driven field more particularly to a kind of two-stage hydraulic cylinders.
Background technique
Hydraulic device is the hydraulic execution that hydraulic energy is changed into mechanical energy, does straight reciprocating motion (or pendulum motion)
Element.Its structure is simple, reliable operation.Deceleration device when realizing reciprocating motion, can be removed from it, and without between transmission
Gap, movement is steady, therefore is used widely in the hydraulic system of various machinery.Hydraulic cylinder power output and piston effective area
And its pressure difference on both sides is directly proportional；Hydraulic cylinder is substantially by cylinder barrel and cylinder cap, piston and piston rod, sealing device, buffer unit
It is formed with exhaust apparatus.Depending on concrete application occasion, other devices are then essential for buffer unit and exhaust apparatus.
The structure type of hydraulic device is varied, classification method also there are many: it is past that straight line can be divided by motion mode
Multiple campaign-styled and gyroscopic pendulum dynamic formula；Single-acting formula, double-acting type can be divided by by action of hydraulic force situation；It can divide by structure type
It is telescopic for piston type, plunger type, multi-stage expansion, pinion and-rack etc.；Pull rod, earrings, footing, hinge can be divided by installation form
Axis etc.；Pressing force grade can be divided into 16Mpa, 25Mpa, 31.5Mpa etc..
Hydraulic device is widely used in driving the lifting action of manned device.It is different from conventional hydraulic device, manned liter
Falling unit require hydraulic device have the characteristics that quick acting, movement steadily without impact and low-speed performance it is good.Existing manned lift
Device generally has open loop and closed-loop control two ways, and opened loop control generally passes through hydraulic power source and supplies power to hydraulic device, by
Hydraulic device drives hoistable platform to complete lifting action control.Since hydraulic device is multistage hydraulic cylinder, commutated in grade and grade
There are difference in areas in journey, thus will cause larger changing-over impact；And multistage changing-over is next stage reoperation after the completion of level-one movement,
Therefore it is unable to satisfy the occasion of quick acting.Close-loop control mode, will generally by installing displacement sensor additional on hoistable platform
Displacement transducer signal detects the controller for being transmitted to proportional control valve, and the output flow of proportional control valve is adjusted by controller
To adjust the flow being input in hydraulic device to realize the speed control of hoistable platform.Since proportional control valve exports when changing grade
Flow very little, and in order to guarantee quick acting requirement, platform speed change rate is larger certainly will to cause platform greater impact.By upper
It states analysis and causes larger changing-over to be impacted as can be seen that existing opened loop control not can avoid, and closed-loop control is rushed to reduce vibration
Hitting can make control strategy become complicated；And in order to guarantee that quick acting requirement percentage speed variation is larger, so that it is manned to reduce seating
The steady comfort of lifting device.
Therefore, existing various hydraulic devices all have the defects that it can not overcome when carrying out multistage actuation.
Utility model content
For the status of the prior art, a kind of simple structure is proposed, synchronous actuation, movement steadily without grade impact is changed, are led to
Cross adjustment structural parameters, so that it may reach the two-stage hydraulic cylinder that the actuation characteristics of motion at different levels can be set.
Specifically, the utility model provides a kind of two-stage hydraulic cylinder, which is characterized in that the two-stage hydraulic cylinder includes:
Outer cylinder, piston, guide sleeve, drive end bearing bracket and piston rod, the outer cylinder are the closed cylinder of first end, the outer cylinder
Bottom side is provided with the first fuel feed hole, and middle side edge is provided with the second fuel feed hole, and the piston is placed in the outer cylinder, described to lead
The second end of the outer cylinder is fixedly mounted on to set, the guide sleeve is in the closed cylindrical shape of first end, first end and institute
State that piston is fixedly connected and first end bottom side is provided with third fuel feed hole, the side wall of the guide sleeve and the guide sleeve can
It is slidably tightly connected, can integrally be slided relative to the outer cylinder and the guide sleeve with the piston, the work
Stopper rod is extend into the guide sleeve, is connect with the guide sleeve slidable sealing, shape between the outer cylinder and the piston
At the first oiling chamber, by the first fuel feed hole oil inlet, the diameter of the guide sleeve is less than the diameter of the piston, described to lead
The part except the guide sleeve, which is stretched out, to guide sleeve described in set, the outer cylinder and the piston forms the second appearance oil pocket,
By the second fuel feed hole oiling, after second holds oil pocket oiling, the closing of the second fuel feed hole is described in the guide sleeve bottom
Piston, the piston rod and the guide sleeve surround third and hold oil pocket, and the third holds oil pocket and passes through third fuel feed hole and institute
State the second appearance oil pocket connection.
Preferably, the guide sleeve of the two-stage hydraulic cylinder has the first of oblique angle in the side towards the outer cylinder bottom
Protruding portion, the piston have second protruding portion at oblique angle towards the side of the guide sleeve, and first protruding portion is close to institute
The outer wall side of guide sleeve is stated, second protruding portion is close to the inner wall side of the outer cylinder.
Preferably, the angle of first protruding portion and the outer cylinder axis is less than second protruding portion and described outer
The angle of bore axis.
Preferably, the cross-sectional area of annular space is equal to the work between the outer cylinder inner wall and the guide sleeve outer wall
The cross-sectional area of stopper rod.
Technical effect
The hydraulic cylinder of the utility model is when from the first oil inlet oil inlet, when rodless cavity drives piston motion, hydraulic cylinder has
Rod cavity uses passive matrix principle, and previous stage cavity oil liquid enters rear stage cavity by 3 inclined hole of guide sleeve and piston rod is driven to transport
It is dynamic, realize that synchronous actuation reduces actuation time；2) piston cylinder diameters and bar diameter at different levels can be set according to outer load movement control law
Meter, so as to realize complicated control law.3) outer cylinder mandril and piston internal check valve device can eliminate hydraulic cylinder
Accumulated error.4) drive end bearing bracket design oblique angle and piston top rade stroke buffer unit, can reduce hydraulic pressure execution device in stroke
End hydraulic shock.The hydraulic cylinder has structure simple, synchronous actuation, moves steadily nothing and changes grade impact, and complexity may be implemented
Control law, fast response time feature.
Detailed description of the invention
Fig. 1 is the mechanical structure schematic diagram of the hydraulic cylinder of the utility model.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing and embodiment, but not therefore by the utility model
Protection scope be limited in embodiment description range among.
The technical solution of the utility model is described in detail below with reference to attached drawing.
As shown in Figure 1, the two-stage hydraulic cylinder of the present embodiment includes: outer cylinder 1, piston 2, guide sleeve 3, drive end bearing bracket 4, piston
Bar 5.
As shown, outer cylinder 1 is the closed cylinder of right end, the bottom side (top in figure) of outer cylinder 1 is provided with first
Fuel feed hole, middle side edge are provided with the second fuel feed hole.Piston 2 is placed in outer cylinder 1, and drive end bearing bracket 4 is fixedly mounted on a left side for outer cylinder 1
End.
Guide sleeve 3 is in the closed cylindrical shape of right end, and right end is fixedly connected with piston 2 and right end bottom side is provided with the
Three fuel feed holes (about 3 guide sleeve respectively shows one in figure), the side wall of guide sleeve 3 is sealed slidingly against with drive end bearing bracket 4 to be connect, and is led
It can integrally be slided to set 3 relative to outer cylinder 1 and drive end bearing bracket 4 with piston.In the present embodiment, guide sleeve 3 passes through screw thread
Installation is on the piston 2.Drive end bearing bracket 4 is by being threadably mounted in outer cylinder 1
Piston rod 5 is extend into guide sleeve 2, is connect with 2 slidable sealing of guide sleeve, is formed between outer cylinder 1 and piston 2
First oiling chamber C, by the first fuel feed hole oil inlet, the diameter of guide sleeve 3 is less than the diameter of piston 2, therefore, the edge of piston
It stretches out except guide sleeve 3.
The part that guide sleeve 3, outer cylinder 1, drive end bearing bracket 4 and piston 2 stretch out except guide sleeve 3 forms second and holds oil pocket A,
The second appearance oil pocket is by the second fuel feed hole oiling, after second holds oil pocket oiling, the second fuel feed hole closing, so forming appearance oil
Chamber.In guide sleeve bottom, the inner wall of the left side wall of piston 2, the right side wall of piston rod 5 and guide sleeve 3 surrounds third and holds oil pocket
B, third hold oil pocket and hold oil pocket connection by third fuel feed hole and second.
As shown, it is α that the drive end bearing bracket 4 of hydraulic cylinder, which has oblique angle in the side towards outer cylinder bottom, in the present embodiment
The first protruding portion, piston 2 towards the side of drive end bearing bracket 4 have oblique angle be β the second protruding portion, the first protruding portion close to guiding
The outer wall side of set 3, the second protruding portion is close to the inner wall side of outer cylinder 1.
Preferably, angle of the angle of the first protruding portion and 1 axis of outer cylinder less than the second protruding portion and outer cylinder axis.
When piston 2 is in end of travel, bevel angle α and the 2 oblique angle β of piston of drive end bearing bracket 4 form seal chamber and work as a buffer.
It can be by adjusting the cross-sectional area of annular space between 3 outer wall of 1 inner wall of outer cylinder and guide sleeve and piston rod
Cross-sectional area ratio between the two adjusts the actuation speed ratio of two-stage hydraulic mechanism.
In the present embodiment, the cross-sectional area of annular space is equal to piston rod between 3 outer wall of 1 inner wall of outer cylinder and guide sleeve
Cross-sectional area, the movement velocity of such two-stage hydraulic mechanism is identical, more steadily.
The diameter of the internal diameter of outer cylinder 1, the outer diameter of guide sleeve 3 and piston rod 5 all in accordance with the speed ratio between at different levels with
And general speed demand is adjustable.
The present embodiment is a kind of preferred implementation of the utility model, in the present embodiment, the outer cylinder 1 of hydraulic cylinder also
Bottom be additionally provided in groove, mandril 6 is installed in groove, check valve 7 is installed with 6 position corresponding position of mandril in piston 2, works as liquid
Cylinder pressure is in initial position, i.e., when piston 2 is located at the bottom of outer cylinder 1, mandril 6 oppresses check valve 7 and compels to be at open shape
State, at this moment rodless cavity C is connected with cavity A, cavity B.
Although the principles of the present invention are described in detail in the preferred embodiment above in conjunction with the utility model,
It should be appreciated by those skilled in the art that above-described embodiment is only the explanation to the exemplary implementation of the utility model, and
The non-restriction to the utility model scope.Details in embodiment does not constitute the limitation to the scope of the utility model,
Without departing substantially from the utility model spirit and scope in the case where, any equivalent transformation based on technical solutions of the utility model, letter
Single replacement etc. is obvious to be changed, and is all fallen within scope of protection of the utility model.
Claims (4)
1. a kind of two-stage hydraulic cylinder, which is characterized in that the two-stage hydraulic cylinder includes: outer cylinder, piston, guide sleeve, drive end bearing bracket
And piston rod, the outer cylinder are the closed cylinder of first end, the bottom side of the outer cylinder is provided with the first fuel feed hole, side
It is provided with the second fuel feed hole in the middle part of side, the piston is placed in the outer cylinder, and the guide sleeve is fixedly mounted on the outer cylinder
Second end, the guide sleeve be in the closed cylindrical shape of first end, first end is fixedly connected with the piston and first end
Bottom side is provided with third fuel feed hole, and the side wall of the guide sleeve is sealed slidingly against with the guide sleeve and connect, can be with institute
Piston to be stated integrally to slide relative to the outer cylinder and the guide sleeve, the piston rod is extend into the guide sleeve,
It is connect with the guide sleeve slidable sealing, forms the first oiling chamber between the outer cylinder and the piston, pass through described
One fuel feed hole oil inlet, the diameter of the guide sleeve are less than the diameter of the piston, are oriented to described in the guide sleeve, the outer cylinder
Set and the piston, which stretch out the part except the guide sleeve and form second, holds oil pocket, by the second fuel feed hole oiling,
After second holds oil pocket oiling, the closing of the second fuel feed hole, in the guide sleeve bottom, the piston, the piston rod and described
Guide sleeve surrounds third and holds oil pocket, and the third holds oil pocket and holds oil pocket connection by third fuel feed hole and described second.
2. two-stage hydraulic cylinder according to claim 1, which is characterized in that the guide sleeve of the two-stage hydraulic cylinder is towards institute
The side for stating outer cylinder bottom has first protruding portion at oblique angle, and the piston has oblique angle towards the side of the guide sleeve
Second protruding portion, first protruding portion is close to the outer wall side of the guide sleeve, and second protruding portion is close to the outer shell
The inner wall side of cylinder.
3. two-stage hydraulic cylinder according to claim 2, which is characterized in that first protruding portion and the outer cylinder axis
Angle be less than second protruding portion and the outer cylinder axis angle.
4. two-stage hydraulic cylinder according to claim 1, which is characterized in that the outer cylinder inner wall and the guide sleeve outer wall
Between annular space cross-sectional area be equal to the piston rod cross-sectional area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821715679.2U CN209041213U (en) | 2018-10-23 | 2018-10-23 | A kind of two-stage hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821715679.2U CN209041213U (en) | 2018-10-23 | 2018-10-23 | A kind of two-stage hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209041213U true CN209041213U (en) | 2019-06-28 |
Family
ID=67036904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821715679.2U Active CN209041213U (en) | 2018-10-23 | 2018-10-23 | A kind of two-stage hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209041213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294294A (en) * | 2021-12-08 | 2022-04-08 | 中国船舶重工集团公司第七0四研究所 | Double-oil-medium pressure cylinder and working method thereof |
-
2018
- 2018-10-23 CN CN201821715679.2U patent/CN209041213U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294294A (en) * | 2021-12-08 | 2022-04-08 | 中国船舶重工集团公司第七0四研究所 | Double-oil-medium pressure cylinder and working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2012215220A5 (en) | ||
| CN103982488A (en) | Adjustable buffering device of large cylinder body | |
| CN106050775B (en) | Structure improved pilot-actuated valve | |
| CN1945028A (en) | Hydraulic balance valve capable of automatically adapting load change | |
| CN205669520U (en) | buffering structure of hydraulic cylinder | |
| CN209041213U (en) | A kind of two-stage hydraulic cylinder | |
| CN105971956B (en) | A kind of pilot-actuated valve | |
| CN102434690A (en) | Opening-assisting method and opening-assisting device of check valve | |
| US9103357B2 (en) | Cylinder | |
| CN1322240C (en) | Single rod and rough symmetric double actuating surfaces hydraulic cylinder with internal displacement sensor | |
| CN103994042B (en) | Piston type hydraulic pump with crank connecting rod structure | |
| CN103867524B (en) | A kind of double-action two-stage hydraulic cylinder | |
| CN102367818A (en) | Special integrated group valve for electrohydraulic push rod | |
| CN102996570B (en) | Single-action double-graded hydraulic cylinder and engineering machine | |
| CN105179361A (en) | Hydraulic buffer oil cylinder and crane | |
| CN111828420A (en) | Hydraulic compensation balance valve | |
| CN203297188U (en) | Constant pressure oil cylinder | |
| CN210660816U (en) | Buffering self-adaptive adjusting device and hydraulic cylinder with same | |
| CN106122144B (en) | The pilot-actuated valve to operate steadily | |
| CN106801629B (en) | A kind of steam turbine quick-closing valve oil motor device | |
| CN202132305U (en) | High-pressure oil cylinder with buffering device in rod cavity | |
| CN202228470U (en) | Magneto-rheological fluid gas-liquid damping cylinder | |
| CN202301249U (en) | Electro-hydraulic push rod-dedicated integrated valve bank | |
| CN112483504A (en) | Double-acting single-rod symmetrical hydraulic cylinder capable of balancing gravity | |
| CN209704979U (en) | Multi-stage oil cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |