CN109869372A - Multi-stage oil cylinder - Google Patents
Multi-stage oil cylinder Download PDFInfo
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- CN109869372A CN109869372A CN201910211814.2A CN201910211814A CN109869372A CN 109869372 A CN109869372 A CN 109869372A CN 201910211814 A CN201910211814 A CN 201910211814A CN 109869372 A CN109869372 A CN 109869372A
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- oilhole
- detection
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- oil
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- 238000001514 detection method Methods 0.000 claims abstract description 68
- 238000007789 sealing Methods 0.000 claims description 25
- 230000035772 mutation Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
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Abstract
The invention discloses a kind of multi-stage oil cylinders, including outer cylinder, at least one intermediate cylinder barrel and piston rod, piston component is housed on piston rod, piston component will be separated out oil suction chamber and oil back chamber in outer cylinder, piston component includes first stage piston and at least one secondary piston, cylinder barrel is connected among first stage piston and chopped-off head, outer cylinder is equipped with a detection oilhole, pressure sensor is connected on detection oilhole, it is sealed between first stage piston and the inner wall of outer cylinder, first stage piston makes to detect oilhole by detecting oilhole and is connected to oil back chamber or is connected to oil suction chamber from being connected to switch to oil back chamber and generates pressure jump from being connected to switch to oil suction chamber, the pressure jump of pressure sensor detection detection oilhole is to determine regional position of the first stage piston in outer cylinder.By the above-mentioned means, multi-stage oil cylinder of the present invention, is able to detect the running regional position of piston, reserves enough response times, structure letter is answered, practical and convenient, securely and reliably.
Description
Technical field
The present invention relates to oil cylinder fields, more particularly to a kind of multi-stage oil cylinder.
Background technique
The characteristics of Multi-stage cylinder is: impulse stroke can be very long, can contract shorter when not working；
It is long that Multi-stage cylinder is mainly used in stretching demand stroke, and the lesser occasion in axially mounted space, such as hydraulic elevator, high-altitude
In the Other Engineerings such as Operation Van machinery.But conventional Multi-stage cylinder is substantially telescopic, sequence stretching step by step;When changing grade, by
Big chamber and the small chamber sectional area of annular between adjacent two-stage are all different, and will lead to the mutation of power output and speed；Along with bar
The phenomenon that end is connected with load, can be with vibrating when changing grade.The occasion high for some stability requirements, for example be vertically moved up or down
It is mechanical, it may be possible to be mounted with equipment or the applying working condition of people, conventional structure and hydraulic system in this way certainly exists certain peace
Full hidden danger.
Existing market controls oil circuit flow generally by system, reduces the quickening because stretching out speed caused by changing grade,
And it according to every grade of practical oil area, controls oil circuit and exports oil mass, slow down the fluctuation for stretching out speed.Flow is controlled by system
Mode be usually end of travel at different levels increase buffer structure, and by end on earth after output signal, control solenoid valve turn
And control flow valve or small-large flow pump.There are hysteresis quality in signal feedback, i.e., strokes at different levels on earth after, by the slow of itself
It rushes structure and generates damping drag, reducing speed changes to form tired pressure in this way, and oil pressure is increased to each zero in stroke latter end buffer stroke
Part and it is sealed with higher requirement；Secondly lag output after believing, the response time for leaving system for are reduced, and practical alleviate changes grade vibration
Effect be not highly desirable.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of multi-stage oil cylinders, are able to detect the running regionality of piston
Enough response times are reserved in position, and structure letter is answered, practical and convenient, securely and reliably.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of multi-stage oil cylinder is provided, including outer
Cylinder barrel, at least one intermediate cylinder barrel and piston rod, are equipped with piston component on the piston rod, and the piston component is by outer cylinder
It is inside separated out oil suction chamber and oil back chamber, the piston component includes first stage piston and at least one secondary piston, and the level-one is living
Plug is connected with cylinder barrel among chopped-off head, and the outer cylinder is equipped with a detection oilhole, is connected with pressure on the detection oilhole
Sensor seals between the first stage piston and the inner wall of outer cylinder, when the first stage piston is located on the left of detection oilhole, detection
Oilhole is connected to oil back chamber, and when first stage piston is located on the right side of detection oilhole, detection oilhole is connected to oil suction chamber, the first stage piston
Make to detect oilhole by detecting oilhole to be connected to oil back chamber or from being connected to switching with oil back chamber from being connected to switch to oil suction chamber
To pressure jump is connected to and generated with oil suction chamber, the pressure jump of the pressure sensor detection detection oilhole is to determine that level-one is living
Fill in the regional position in outer cylinder.
In a preferred embodiment of the present invention, the first stage piston is equipped with sealing ring, and the sealing ring keeps level-one living
It is sealed between plug and outer cylinder, when the sealing ring is located on the left of detection oilhole, detection oilhole is connected to oil back chamber, sealing ring position
When detecting on the right side of oilhole, detection oilhole is connected to oil suction chamber.
In a preferred embodiment of the present invention, the sealing ring connects detection oilhole from oil suction chamber by detecting oilhole
Lead to switch to be connected to oil back chamber or switch to from oil back chamber connection and is connected to oil suction chamber and generates pressure jump.
In a preferred embodiment of the present invention, the detection oilhole is located at the right end of outer cylinder, and the first stage piston is stretched
When out to maximum distance, detecting has spacing between oilhole and sealing ring.
In a preferred embodiment of the present invention, it is connected on the pressure sensor for being adjusted to flow system flow
Control device.
In a preferred embodiment of the present invention, the quantity of the intermediate cylinder barrel is 1.
In a preferred embodiment of the present invention, the quantity of the intermediate cylinder barrel is 2 or more, is removed in the intermediate cylinder barrel
Secondary detection oilhole is offered on remaining intermediate cylinder barrel among final stage except cylinder barrel, the secondary piston passes through corresponding time
Grade detection oilhole is external in intermediate cylinder barrel to detect the secondary piston, and the secondary detection oilhole is connected with detection oilhole
It is logical.
In a preferred embodiment of the present invention, the detection oilhole is staircase test oilhole, and the diameter of oral area is big
Diameter in bottom.
The beneficial effects of the present invention are: multi-stage oil cylinder of the present invention, is able to detect the running regional position of piston, reserves
Enough response times, structure letter is answered, practical and convenient, securely and reliably.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is the structural schematic diagram of one preferred embodiment of multi-stage oil cylinder of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the state diagram that the sealing ring of multi-stage oil cylinder does not pass through detection oilhole；
Fig. 4 is the state diagram that the sealing ring of multi-stage oil cylinder is passing through detection oilhole；
Fig. 5 is that the sealing ring of multi-stage oil cylinder passes through the state diagram of detection oilhole；
The components in the drawings are labeled as follows: 1, outer cylinder, 2, intermediate cylinder barrel, 3, piston rod, 4, piston component, 5, oil suction chamber,
6, oil back chamber, 7, first stage piston, 8, secondary piston, 9, detection oilhole, 10, pressure sensor, 11, sealing ring.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Fig. 1 to Fig. 2, a kind of multi-stage oil cylinder, including outer cylinder 1, at least one intermediate cylinder barrel 2 and piston rod 3 are please referred to,
Piston component 4 is housed, piston component 4 will be separated out oil suction chamber 5 and oil back chamber 6 in outer cylinder 1, piston component 4 wraps on piston rod 3
First stage piston 7 and at least one secondary piston 8 are included, first stage piston 7 is connected with cylinder barrel 2 among chopped-off head, and 1 is equipped with one on outer cylinder
A detection oilhole 9 detects and is connected with pressure sensor 10 on oilhole 9, seals between first stage piston 7 and the inner wall of outer cylinder 1, one
When grade piston 7 is located at detection 9 left side of oilhole, detection oilhole 9 is connected to oil back chamber 6, and first stage piston 7 is located at 9 right side of detection oilhole
When, detection oilhole 9 is connected to oil suction chamber 5, and first stage piston 7 is connected to detection oilhole 10 from oil suction chamber 5 by detecting oilhole 10
It switches to and is connected to oil back chamber 6 or pressure jump, pressure are connected to and generated with oil suction chamber 5 from being connected to switch to oil back chamber 6
The pressure jump of the detection detection oilhole 9 of sensor 10 is to determine regional position of the first stage piston 7 in outer cylinder 1.
In addition, first stage piston 7 is equipped with sealing ring 11, sealing ring makes to seal between 11 first stage pistons 7 and outer cylinder 1, close
When seal 11 is located at detection 9 left side of oilhole, detection oilhole 9 is connected to oil back chamber 6, when sealing ring 11 is located at detection 9 right side of oilhole,
Detection oilhole 9 is connected to oil suction chamber 5.
In addition, sealing ring 11 by detect oilhole 9 make detect oilhole 9 from be connected to oil suction chamber 5 switch to and oil back chamber 6 company
Lead to or switched to from the connection of oil back chamber 6 and is connected to oil suction chamber 5 and generates pressure jump.
In addition, detection oilhole 9 is located at the right end of outer cylinder 1, when first stage piston 7 extend out to maximum distance, detect oilhole 9 and
There is spacing between sealing ring 11.The speed and control that spacing between detection oilhole 9 and sealing ring 11 is run according to piston rod 3
It is adjusted the time required to the practical reflection adjustment of device processed, Multi-stage cylinder may be implemented by this spacing will change in piston rod
Enough adjustment times are reserved between grade to reduce Multi-stage cylinder when changing grade and vibrate.
In addition, being connected with the control device for being adjusted to flow system flow on pressure sensor 10.
In addition, the quantity of intermediate cylinder barrel 2 is 1.
In addition, the quantity of intermediate cylinder barrel 2 is 2 or more, among remaining in intermediate cylinder barrel 2 in addition to cylinder barrel among final stage
Secondary detection oilhole is offered on cylinder barrel 2, secondary piston 8 is by corresponding secondary detection oilhole to detect the secondary piston 8
External in intermediate cylinder barrel 2, secondary detection oilhole is connected with detection oilhole.
In addition, detection oilhole 9 is staircase test oilhole, the diameter of oral area is greater than the diameter of bottom.
The specific working principle is as follows for multi-stage oil cylinder of the present invention: in use, when oil suction chamber 5 starts oil inlet, intermediate cylinder barrel 2 is driven
Piston rod 3 starts to stretch out, referring to Fig. 3, since the sealing ring 11 on first stage piston 7 realizes the sealing with 1 inner wall of outer cylinder, this
When and first stage piston 7 be in detection oilhole 9 left side, detection oilhole 9 is connect with oil back chamber 6, and pressure sensor 10 detects back
The pressure of oil pocket 6；Referring to fig. 4, when piston rod 3 continues to stretch out, after the sealing ring 11 on first stage piston 7 is by detection oilhole 9,
Since first stage piston 7 and outer cylinder 1 seal, the switching of oilhole 9 is detected at this time and is connect with oil suction chamber 5, pressure sensor 10 is examined at this time
The pressure for measuring oil suction chamber 5, sealing ring 11 by detection oilhole 9 when, due to detection 9 short time of oilhole from oil back chamber
6 connections are switched to be connected to oil suction chamber 5, and oil back chamber 6 is different with 5 pressure of oil suction chamber, the pressure that pressure sensor 10 detects at this time
Power can generate the phenomenon that pressure jump, so that control device carries out flow adjustment to oil cylinder according to flow system flow, Multi-stage cylinder be made to exist
It is more stable when changing grade, until first stage piston 7 is run to extreme position referring to Fig. 5.Conversely, piston rod 3 retract when equally such as
This.
The mode of inductive signal output, multi-stage oil cylinder of the present invention avoid when relative to original end buffering and being formed on earth
The characteristics of pressure rise caused by original pocketed oil at the end of the stroke and feedback lag.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (8)
1. a kind of multi-stage oil cylinder, including outer cylinder, at least one intermediate cylinder barrel and piston rod, piston is housed on the piston rod
Component, the piston component will be separated out oil suction chamber and oil back chamber in outer cylinder, which is characterized in that the piston component includes one
Cylinder barrel is connected among grade piston and at least one secondary piston, the first stage piston and chopped-off head, and the outer cylinder is equipped with one
A detection oilhole is connected with pressure sensor on the detection oilhole, seals between the first stage piston and the inner wall of outer cylinder,
When the first stage piston is located on the left of detection oilhole, detection oilhole is connected to oil back chamber, and first stage piston is located on the right side of detection oilhole
When, detection oilhole be connected to oil suction chamber, and the first stage piston makes detection oilhole from being connected to switching with oil suction chamber by detection oilhole
Extremely it is connected to oil back chamber or pressure jump is connected to and generated with oil suction chamber from being connected to switch to oil back chamber, the pressure sensing
The pressure jump of device detection detection oilhole is to determine regional position of the first stage piston in outer cylinder.
2. multi-stage oil cylinder according to claim 1, which is characterized in that the first stage piston is equipped with sealing ring, described close
Seal makes to seal between first stage piston and outer cylinder, when the sealing ring is located on the left of detection oilhole, detects oilhole and oil back chamber
Connection, when sealing ring is located on the right side of detection oilhole, detection oilhole is connected to oil suction chamber.
3. multi-stage oil cylinder according to claim 2, which is characterized in that the sealing ring makes to detect oilhole by detecting oilhole
It is connected to oil suction chamber from being connected to switch to be connected to oil back chamber or switch to from oil back chamber connection with oil suction chamber and generates pressure
Mutation.
4. multi-stage oil cylinder according to claim 3, which is characterized in that the detection oilhole is located at the right end of outer cylinder, institute
When stating first stage piston and extending out to maximum distance, detecting has spacing between oilhole and sealing ring.
5. multi-stage oil cylinder according to claim 1 to 4, which is characterized in that be connected with and be used on the pressure sensor
The control device that flow system flow is adjusted.
6. multi-stage oil cylinder according to claim 5, which is characterized in that the quantity of the intermediate cylinder barrel is 1.
7. multi-stage oil cylinder according to claim 5, which is characterized in that the quantity of the intermediate cylinder barrel is 2 or more, described
Secondary detection oilhole, the secondary piston are offered on remaining intermediate cylinder barrel in intermediate cylinder barrel in addition to cylinder barrel among final stage
, the secondary detection oilhole and inspection external in intermediate cylinder barrel to detect the secondary piston by corresponding secondary detection oilhole
Metering jet is connected.
8. multi-stage oil cylinder according to claim 6 or 7, which is characterized in that the detection oilhole is staircase test oilhole,
The diameter of its oral area is greater than the diameter of bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910211814.2A CN109869372B (en) | 2019-03-20 | 2019-03-20 | Multi-stage oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910211814.2A CN109869372B (en) | 2019-03-20 | 2019-03-20 | Multi-stage oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109869372A true CN109869372A (en) | 2019-06-11 |
| CN109869372B CN109869372B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910211814.2A Active CN109869372B (en) | 2019-03-20 | 2019-03-20 | Multi-stage oil cylinder |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2708794A1 (en) * | 1977-03-01 | 1978-09-07 | Schott Gmbh & Co Kg | Limit switch for cylinder and piston under pressure - has actuator rod penetrating front wall into socket in field of coil |
| DE4201464A1 (en) * | 1992-01-21 | 1993-07-22 | Festo Kg | Controlled damping for end stops of damping cylinder - having sensors to monitor piston travel and with programmed damping control |
| JPH11217191A (en) * | 1998-02-02 | 1999-08-10 | Sumitomo Constr Mach Co Ltd | Telescope-type multistage boom expanding and contracting device |
| DE29811413U1 (en) * | 1998-06-25 | 1999-08-26 | Bison Stematec Maschinenbau Un | Multi-stage, double-acting hydraulic cylinder with hydraulic arrangement, especially for lifting work systems |
| US20010037689A1 (en) * | 2000-03-08 | 2001-11-08 | Krouth Terrance F. | Hydraulic actuator piston measurement apparatus and method |
| CN2665430Y (en) * | 2003-11-28 | 2004-12-22 | 三一重工股份有限公司 | Hydraulic oil cylinder with pressure differential triggering changing-over control structure |
| DE102007010115A1 (en) * | 2007-02-28 | 2008-09-04 | Robert Bosch Gmbh | Pneumatic drive for automation engineering applications, has electronic evaluation unit determining speed and/or acceleration of piston and diagnostic information for operating condition control by analysis of flow of binary signals |
| CN201433955Y (en) * | 2009-06-14 | 2010-03-31 | 杨雁征 | Hydraulic oil cylinder |
| CN101749301A (en) * | 2008-12-18 | 2010-06-23 | 中集车辆（集团）有限公司 | Hydraulic cylinder device and hydraulic cylinder behavior control system with same |
| CN209704979U (en) * | 2019-03-20 | 2019-11-29 | 江苏恒立液压股份有限公司 | Multi-stage oil cylinder |
-
2019
- 2019-03-20 CN CN201910211814.2A patent/CN109869372B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2708794A1 (en) * | 1977-03-01 | 1978-09-07 | Schott Gmbh & Co Kg | Limit switch for cylinder and piston under pressure - has actuator rod penetrating front wall into socket in field of coil |
| DE4201464A1 (en) * | 1992-01-21 | 1993-07-22 | Festo Kg | Controlled damping for end stops of damping cylinder - having sensors to monitor piston travel and with programmed damping control |
| JPH11217191A (en) * | 1998-02-02 | 1999-08-10 | Sumitomo Constr Mach Co Ltd | Telescope-type multistage boom expanding and contracting device |
| DE29811413U1 (en) * | 1998-06-25 | 1999-08-26 | Bison Stematec Maschinenbau Un | Multi-stage, double-acting hydraulic cylinder with hydraulic arrangement, especially for lifting work systems |
| US20010037689A1 (en) * | 2000-03-08 | 2001-11-08 | Krouth Terrance F. | Hydraulic actuator piston measurement apparatus and method |
| CN2665430Y (en) * | 2003-11-28 | 2004-12-22 | 三一重工股份有限公司 | Hydraulic oil cylinder with pressure differential triggering changing-over control structure |
| DE102007010115A1 (en) * | 2007-02-28 | 2008-09-04 | Robert Bosch Gmbh | Pneumatic drive for automation engineering applications, has electronic evaluation unit determining speed and/or acceleration of piston and diagnostic information for operating condition control by analysis of flow of binary signals |
| CN101749301A (en) * | 2008-12-18 | 2010-06-23 | 中集车辆（集团）有限公司 | Hydraulic cylinder device and hydraulic cylinder behavior control system with same |
| CN201433955Y (en) * | 2009-06-14 | 2010-03-31 | 杨雁征 | Hydraulic oil cylinder |
| CN209704979U (en) * | 2019-03-20 | 2019-11-29 | 江苏恒立液压股份有限公司 | Multi-stage oil cylinder |
Non-Patent Citations (1)
| Title |
|---|
| 沈姝君;董勇;: "活塞杆实心制式双作用多级液压缸的设计", 液压与气动, no. 05, 15 May 2013 (2013-05-15) * |
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| CN109869372B (en) | 2024-03-29 |
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