CN107120333B - The self-locking hydraulic cylinder being mounted on lifting device - Google Patents
The self-locking hydraulic cylinder being mounted on lifting device Download PDFInfo
- Publication number
- CN107120333B CN107120333B CN201710491509.4A CN201710491509A CN107120333B CN 107120333 B CN107120333 B CN 107120333B CN 201710491509 A CN201710491509 A CN 201710491509A CN 107120333 B CN107120333 B CN 107120333B
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- Prior art keywords
- cylinder
- piston
- sleeve
- locking
- piston rod
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- 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.)
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Classifications
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- 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
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- 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
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- 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
- F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
Abstract
The invention discloses the self-locking hydraulic cylinders being mounted on lifting device, including cylinder bottom, piston, cylinder barrel, cylinder cap, piston rod, piston and piston rod are respectively positioned in cylinder barrel, piston bush is on the piston rod, cylinder cap is by piston rod packing in cylinder barrel, the cylinder bottom and cylinder barrel weld, rodless cavity and rod chamber are respectively formed between piston and cylinder bottom and cylinder cap, piston rod is equipped with sleeve, sleeve covers on the outer wall of piston rod, and sleeve can be rotated around the axis of piston rod, locking slot is additionally provided on sleeve, the inner wall of the cylinder barrel is equipped with the second groove, be equipped in second groove connecting element and with the matched locking pin shaft of locking slot, connecting element one end is connect with the second groove, the other end and locking pin axis connection, and locking pin shaft can move along the axis direction of connecting element.The present invention can structure be simple, manufacturing cost is low, and self-locking unfailing performance is good.
Description
Technical field
The present invention relates to a kind of hydraulic cylinders, and in particular to the self-locking hydraulic cylinder being mounted on lifting device.
Background technique
Engineering machinery is the general name of the construction machinery for engineering construction.It is widely used in building, water conservancy, electric power, road, mine
The engineering fields such as mountain, harbour and national defence, many kinds of, engineering machinery is the important component of Chinese equipment manufacturing industry.Briefly
It says, synthesis needed for all restoration in earth-rock construction engineerings, pavement construction and maintenance, the operation of flow-type lift and various architectural engineerings
Mechanized equipment, referred to as engineering machinery necessary to property mechanized construction engineering.It is mainly used for national defense construction engineering, communications and transportation
Construction, the construction of the raw and semifinished materials industries such as energy industry construction and production, mine and production, agriculture, forestry, water conservancy construction, industry are built with civilian
It builds, urban construction, the fields such as environmental protection.It is substantially similar to the appellation of this industry in countries in the world, the wherein U.S. and Britain
Referred to as building machinery and equipment, Germany are known as building machinery and device, and Russia is known as building and road building machine, Japan are known as building
If mechanical.It is also referred to as construction implement in our national portioned products, and the sector certification is set up according to State Council in mechanical system
When be referred to as engineering machinery, continue up till now.Various countries are roughly the same to the sector delimitation product scope, China Construction Machinery
Railway project mechanical, fork truck and industrial transportation vehicle, finishing machinery, elevator, pneumatic are also added compared with other various countries
The industries such as tool.
Elevator also uses relatively broad in engineering machinery, and elevator is convenient for the goods handling on ground is high to operation
Degree, piston rod when then needing in elevator is maintained at certain height, when hydraulic jack is promoted to certain altitude, into
Row is self-locking, and must assure that self-locking high efficient and reliable, to prevent there is safety accident.But existing hydraulic cylinder self locking mode mostly uses greatly
Hydraulic control one-way valve machine circuit, makes hydraulic cylinder be maintained at certain position.Due to the limitation of technical level, in hydraulic valve core or hydraulic cylinder
The case where often will appear leakage, hydraulic locking cylinder is caused to be not thorough, locking effect is poor, the self-locking knot to hydraulic cylinder of some mechanical
Configuration formula improves, and causes hydraulic cylinder finished product structure complicated, production cost is also sharply increased.
Summary of the invention
The hydraulic control one-way valve machine circuit used the technical problem to be solved by the present invention is to the prior art is self-locking to realize, but
It is the case where often will appear leakage in hydraulic valve core or hydraulic cylinder, to cause hydraulic locking cylinder to be not thorough, locking effect is poor, purpose
It is to provide the self-locking hydraulic cylinder being mounted on lifting device, solves problem described above.
The present invention is achieved through the following technical solutions:
The self-locking hydraulic cylinder being mounted on lifting device, including cylinder bottom, piston, cylinder barrel, cylinder cap, piston rod, piston with
Piston rod is respectively positioned in cylinder barrel, and on the piston rod, by piston rod packing in cylinder barrel, the cylinder bottom and cylinder barrel weld cylinder cap piston bush
It connects, rodless cavity and rod chamber is respectively formed between piston and cylinder bottom and cylinder cap, piston rod is equipped with sleeve, and sleeve is covered in piston rod
Outer wall on, and sleeve can be rotated around the axis of piston rod, locking slot is additionally provided on sleeve, on the inner wall of the cylinder barrel
Be equipped with equipped with the second groove, in the second groove connecting element and with the matched locking pin shaft of locking slot, connecting element one end and the
The connection of two grooves, the other end and locking pin axis connection, and lock pin shaft and can be moved along the axis direction of connecting element.
Further, support column and the first sealing ring are additionally provided on the piston, support column is located in rodless cavity, and first is close
Seal covers between piston and cylinder barrel.
Further, be additionally provided on the cylinder bottom with matched first groove of support column, cushioning element is equipped in the first groove
Part, the axis of buffer element and the axis of support column are on same straight line.
Further, it is additionally provided with oil inlet on the cylinder bottom, and carries out mouth and is connected to the first groove.
Further, inflow pipeline is additionally provided on the sleeve, rod chamber is connected to by inflow pipeline with locking slot.
Further, swing handle is additionally provided on the sleeve, and swing handle is on the outside of cylinder cap.
Further, the second sealing ring and dustband are additionally provided between the cylinder cap and sleeve, the second sealing ring and dust-proof
Circle covers on sleeve, and is fixed in cylinder cap.
Compared with prior art, the present invention having the following advantages and benefits:
The present invention is mounted on the self-locking hydraulic cylinder on lifting device, when needing self-locking, when piston rod reaches a positioning
When setting, locking pin shaft will be pressed in locking slot by flexible connecting element, realize self-locking purpose；When needing to unlock
When, hydraulic oil is conveyed into rod chamber, hydraulic oil flows through inflow pipeline and goes out locking slot for pin shaft is locked；Turnbarrel piston simultaneously
Bar can not then carry out self-locking, meet different use demands；It is additionally provided with buffer unit between cylinder bottom and piston, piston pair can be reduced
The impact force of cylinder bottom extends the service life of hydraulic cylinder.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is schematic structural view of the invention.
Label and corresponding parts title in attached drawing:
1- cylinder bottom, 2- buffer gear, 3- piston, 4- cylinder barrel, 5- locking slot, 6- sleeve, 7- lock pin shaft, 8- cylinder cap, 9-
Swing handle, 10- oil inlet, 11- support column, the first sealing ring of 12-, 13- inflow pipeline, 14- oil return opening, 15- connecting element,
16- piston, 17- dustband, the second sealing ring of 18-.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
As shown in Figure 1, the present invention is mounted on the self-locking hydraulic cylinder on lifting device, including cylinder bottom 1, cylinder barrel 4, piston 3,
Piston rod 16 and cylinder cap 8, the cylinder bottom 1 weld together with 4 one end of cylinder barrel, increase the intensity of junction, and cylinder bottom 1 is equipped with
Oil inlet 10,3 sets of piston on the end of piston rod 16, and piston rod 16 and piston 3 are respectively positioned in cylinder barrel 4, piston 3 and cylinder
The first sealing ring 12 is equipped between cylinder 4, the first sealing ring 12 is O-ring seal, and the first 12 sets of sealing ring is close in piston 3, first
The effect of seal 12 is the clearance leakage for preventing hydraulic oil between cylinder barrel 4 and piston 3, the area formed between piston 3 and cylinder bottom 1
Domain is rodless cavity, and the region formed between piston 3 and cylinder cap 8 is rod chamber, and the piston rod 16 is equipped with sleeve 6,6 sets of sleeve
On the outer wall of piston rod 16, and sleeve 6 can be rotated around the axis of piston rod 16, and piston rod 16 stretches in cylinder barrel 4
When, sleeve 6 will and then piston rod 16 move together, and the cylinder cap 8 is equipped with the second sealing ring 18 and dustband 17, dustband 17
Close 8 outside with cylinder cap, and the second sealing ring 18 and dustband 17 cover on sleeve 6, and the effect of dustband 17 is to prevent
Extraneous impurity is entered in cylinder barrel 4 by the gap between sleeve 6 and cylinder cap 8, and the second sealing ring 18 is also O-ring seal,
Effect is the hydraulic fluid leak prevented in cylinder barrel 4；Locking slot 5 there are two setting on the sleeve 6, two locking slots 5 are about sleeve 6
Axisymmetrical, and two inflow pipelines 13 are additionally provided on sleeve 6,13 one end of inflow pipeline is connected to rod chamber, another
End be connected to locking slot 5, the hydraulic oil in rodless cavity will enter in locking slot 5 along inflow pipeline 13, the cylinder barrel 4 it is interior
It is set on wall there are two the second groove, two the second grooves symmetrically, are equipped with connecting element 15 and locking about sleeve 4 in the second groove
Pin shaft 7, connecting element 15 are spring, have certain elasticity, and 15 one end of connecting element is connected in the second groove, the other end with
It locks pin shaft 7 to connect, locking pin shaft 7 is matched with locking slot 5, i.e., when locking slot 5 is moved to and locks pin shaft 7 in same plane
When, connecting element 15 will squeeze into locking pin shaft 7 in locking slot 5, and locking pin shaft 7 locks sleeve 6, and piston rod 16 will be unable to
It is mobile；Oil return opening 14 is additionally provided on the cylinder barrel 4, oil return opening 14 is connected to rod chamber, towards oil return opening 14 at be passed through hydraulic oil, liquid
Pressure oil enters in rod chamber, increases the pressure in rod chamber, and hydraulic oil will enter in locking slot 5 along inflow pipeline 13,
When pressure of the hydraulic oil to locking pin shaft 7 is greater than the elastic force of 15 pairs of connecting element locking pin shafts 7, locking pin shaft 7 locks place
It is squeezed out in slot 5, piston rod 16 will be moved along cylinder bottom 1, realize unlock；Swing handle is additionally provided on the sleeve 6
9, and swing handle 9 is located at 8 outside of cylinder cap, pulls swing handle 9, and sleeve 6 will and then swing handle 9 rotate together, therefore
When not needing be self-locking to piston rod 16, it is only necessary to pull swing handle 9, axial displacement occurs for sleeve 6, so that locking pin shaft 7
Will be on no longer same straight line with locking slot 5, in the process of moving, locking pin shaft 7 will be unable to enter to locking slot 5 piston rod 16
It is interior, piston rod 16 can not be implemented self-locking, meet different use functions.
Embodiment 2
As shown in Figure 1, the present invention is mounted on the self-locking hydraulic cylinder on lifting device, it is on the basis of embodiment 1, described
The first groove is additionally provided on cylinder bottom 1, oil inlet 10 is connected to the first groove, and buffer element 2 is equipped in groove, and buffer element 2 is
Spring has certain elasticity, is additionally provided with support column 11 on the piston 3, and support column 11 is in rodless cavity, support column
The axis of 11 axis and buffer element 2 is on same straight line, when piston rod 16 back moves together with piston 3, branch
Dagger 11 is able to enter to the first groove, and the buffer element 2 in the first groove will generate cushion effect to support column 11, is reduced and is lived
The impact force for filling in 3 pairs of cylinder bottoms 1 extends the service life of hydraulic cylinder.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (3)
1. being mounted on the self-locking hydraulic cylinder on lifting device, including cylinder bottom (1), piston (3), cylinder barrel (4), cylinder cap (8), piston
Bar (16), piston (3) and piston rod (16) are respectively positioned in cylinder barrel (4), and piston (3) covers on piston rod (16), and cylinder cap (8) will live
Stopper rod (16) is sealed in cylinder barrel (4), it is characterised in that: the cylinder bottom (1) and cylinder barrel (4) are welded, piston (3) and cylinder bottom (1)
Rodless cavity and rod chamber are respectively formed between cylinder cap (8), piston rod (16) is equipped with sleeve (6), and sleeve (6) is covered in piston rod
(16) on outer wall, and sleeve (6) can be rotated around the axis of piston rod (16), and sleeve is additionally provided with locking slot on (6)
(5), the inner wall of the cylinder barrel (4) is equipped with the second groove, be equipped in the second groove flexible connecting element (15) and with
The matched locking pin shaft (7) of locking slot (5), connecting element (15) one end are connect with the second groove, the other end and locking pin shaft (7)
Connection, and locking pin shaft (7) can be mobile along the axis direction of connecting element (15), is additionally provided with branch on the piston (3)
Dagger (11) and the first sealing ring (12), support column (11) are located in rodless cavity, and the first sealing ring (12) is covered in piston (3) and cylinder
Between cylinder (4), it is additionally provided on the cylinder bottom (1) and support column (11) matched first groove, the first groove is interior equipped with cushioning element
Part (2), the axis of buffer element (2) and the axis of support column (11) on same straight line, be additionally provided on the cylinder bottom (1) into
Hydraulic fluid port (10), and oil inlet (10) is connected to the first groove, is additionally provided with inflow pipeline (13), oil inlet pipe on the sleeve (6)
Rod chamber is connected to by road (13) with locking slot (5).
2. the self-locking hydraulic cylinder according to claim 1 being mounted on lifting device, it is characterised in that: the sleeve
(6) it is additionally provided on swing handle (9), and swing handle (9) is on the outside of cylinder cap (8).
3. the self-locking hydraulic cylinder according to claim 1 being mounted on lifting device, it is characterised in that: the cylinder cap
(8) the second sealing ring (18) and dustband (17) are additionally provided between sleeve (6), the second sealing ring (18) and dustband (17) are equal
It covers on sleeve (6), and is fixed in cylinder cap (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710491509.4A CN107120333B (en) | 2017-06-26 | 2017-06-26 | The self-locking hydraulic cylinder being mounted on lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710491509.4A CN107120333B (en) | 2017-06-26 | 2017-06-26 | The self-locking hydraulic cylinder being mounted on lifting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107120333A CN107120333A (en) | 2017-09-01 |
| CN107120333B true CN107120333B (en) | 2018-12-04 |
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ID=59719367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710491509.4A Active CN107120333B (en) | 2017-06-26 | 2017-06-26 | The self-locking hydraulic cylinder being mounted on lifting device |
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| Country | Link |
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| CN (1) | CN107120333B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626211B (en) * | 2018-04-13 | 2023-11-28 | 宜昌长机科技有限责任公司 | Optical axis locking mechanism and operation method |
| CN111379760B (en) * | 2018-12-28 | 2021-07-09 | 比亚迪股份有限公司 | Oil cylinder, hydraulic system and lifting equipment |
| CN113864286B (en) * | 2021-09-30 | 2024-02-06 | 中船重工中南装备有限责任公司 | Self-locking device of slide plate oil cylinder |
| CN114576235A (en) * | 2022-03-30 | 2022-06-03 | 娄底市中兴液压件有限公司 | Hydraulic cylinder and working machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406879A (en) * | 1992-12-09 | 1995-04-18 | Lucas Industries | Actuator lock |
| CN204357821U (en) * | 2014-11-21 | 2015-05-27 | 安徽理工大学 | A kind of mechanical self-locking hydraulic cylinder |
| CN106286466A (en) * | 2016-10-28 | 2017-01-04 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | The double rod of a kind of double acting just position, end mechanical locking oil cylinder |
| CN106481616A (en) * | 2016-12-06 | 2017-03-08 | 泸州长江液压密封件有限公司 | The hydraulic cylinder of self-locking is carried out using spring |
-
2017
- 2017-06-26 CN CN201710491509.4A patent/CN107120333B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406879A (en) * | 1992-12-09 | 1995-04-18 | Lucas Industries | Actuator lock |
| CN204357821U (en) * | 2014-11-21 | 2015-05-27 | 安徽理工大学 | A kind of mechanical self-locking hydraulic cylinder |
| CN106286466A (en) * | 2016-10-28 | 2017-01-04 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | The double rod of a kind of double acting just position, end mechanical locking oil cylinder |
| CN106481616A (en) * | 2016-12-06 | 2017-03-08 | 泸州长江液压密封件有限公司 | The hydraulic cylinder of self-locking is carried out using spring |
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| Publication number | Publication date |
|---|---|
| CN107120333A (en) | 2017-09-01 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190926 Address after: 610000 Chengdu China (Sichuan) Free Trade Pilot Area, Chengdu, Sichuan Province, No. 88, Jiaozi Avenue, Chengdu High-tech Zone, 2 buildings, 10 floors, No. 102 Patentee after: Sichuan Xingzhi Zhihui Intellectual Property Operation Co.,Ltd. Address before: 610000 Luzhou city of Sichuan province Liyang machinery and equipment Industrial Park Road No. ten Patentee before: LUZHOU CHANGJIANG OIL CYLINDER MANUFACTURING Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20191016 Address after: 213002 no.65-3, Runyuan Road, Xinbei District, Changzhou City, Jiangsu Province Patentee after: Changzhou Keheng Hydraulic Machinery Co.,Ltd. Address before: 610000 Chengdu China (Sichuan) Free Trade Pilot Area, Chengdu, Sichuan Province, No. 88, Jiaozi Avenue, Chengdu High-tech Zone, 2 buildings, 10 floors, No. 102 Patentee before: Sichuan Xingzhi Zhihui Intellectual Property Operation Co.,Ltd. |
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Effective date of registration: 20221130 Address after: No. 65-3, Runyuan Road, North Area, Industrial Concentration Zone, Benniu Town, Xinbei District, Changzhou City, Jiangsu Province, 213,002 Patentee after: Changzhou BINJIA Machinery Co.,Ltd. Address before: 213002 65-3 Runyuan Road, Xinbei District, Changzhou City, Jiangsu Province Patentee before: Changzhou Keheng Hydraulic Machinery Co.,Ltd. |
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