CN109026902B - Multi-damping-hole-type buffer hydraulic cylinder with movable cylinder head - Google Patents
Multi-damping-hole-type buffer hydraulic cylinder with movable cylinder head Download PDFInfo
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- CN109026902B CN109026902B CN201811025358.4A CN201811025358A CN109026902B CN 109026902 B CN109026902 B CN 109026902B CN 201811025358 A CN201811025358 A CN 201811025358A CN 109026902 B CN109026902 B CN 109026902B
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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
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
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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
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
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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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to a multi-damping hole type buffer hydraulic cylinder with a movable cylinder head, which comprises a cylinder body, a positioning ring, a movable cylinder head, a piston, a spring, a one-way valve, a cylinder bottom, a cylinder sleeve and a damping hole, wherein the piston is arranged on the cylinder body; fluting on the cylinder body, holding ring one end card is in the fluting of cylinder body, the other end then links to each other with the cylinder liner is fixed, it is spacing to carry out the piston, set up a movable cylinder head on the left of the holding ring, movable cylinder head can move in the cylinder body, enlarge the changeable volume of the moving range increase cylinder body of piston, be provided with the piston rod that links to each other with the piston is fixed on movable cylinder head left side, the cylinder body divide into according to the position of piston rod has the pole chamber and does not have the pole chamber, it is used for pneumatic cylinder piston to reset to be equipped with the spring on the piston rod, install the cylinder liner between holding ring and the bottom of the cylinder. The device has the advantages of simple structure, convenient disassembly, assembly and maintenance, long service life and high reliability. A movable cylinder head and the like.
Description
Technical Field
The invention belongs to the technical field of hydraulic cylinders, and relates to a multi-damping-hole type buffer hydraulic cylinder with a movable cylinder head.
Background
When the hydraulic cylinder, particularly a heavy-load high-speed hydraulic cylinder, requires a piston to move to the cylinder head or the cylinder bottom of the hydraulic cylinder, the moving speed of the hydraulic cylinder is reduced until the moving speed is zero, so that the hydraulic cylinder is prevented from being damaged due to impact on the cylinder head and the cylinder bottom. The existing hydraulic cylinder buffer structure adopts a cylindrical buffer plunger, a conical buffer plunger, a stepped buffer plunger, a parabolic buffer plunger, orifice buffer, throttle plate buffer and the like, but the hydraulic cylinder buffer structure with the movement speed higher than 4m/s is difficult to achieve a good buffer effect, and buffer parts are difficult to replace and the cost is high.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the multi-damping-hole type buffer hydraulic cylinder with the movable cylinder head, which can well ensure the buffer effect under the condition of not connecting any oil pipe, effectively protects the hydraulic cylinder body when the buffer pressure rises, cannot be damaged by impact, and has the advantages of simple structure, convenience in disassembly and maintenance, long service life and high reliability. A movable cylinder head and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows: a multi-damping hole type buffer hydraulic cylinder with a movable cylinder head comprises a cylinder body, a positioning ring, the movable cylinder head, a piston, a spring, a one-way valve, a cylinder bottom, a cylinder sleeve and a damping hole; fluting on the cylinder body, holding ring one end card is in the fluting of cylinder body, and the other end then links to each other with the cylinder liner is fixed, carries on spacingly to the piston, sets up a movable cylinder head on the left of the holding ring, and movable cylinder head can move in the cylinder body, enlarges the variable volume of the displacement range increase cylinder body of piston, is provided with the piston rod that links to each other with the piston is fixed on movable cylinder head left side, and the cylinder body divide into according to the position of piston rod has the pole
The piston rod is provided with a spring for resetting the piston of the hydraulic cylinder, a cylinder sleeve is arranged between the positioning ring and the cylinder bottom, and the outer side of the cylinder sleeve is provided with a plurality of damping holes with different intervals along the axial direction.
Sealing elements are arranged on the outer circles of the inner holes of the movable cylinder heads, so that the sealing property is ensured; the movable cylinder head can increase the volume of the rod cavity when the piston performs a buffering stroke, so that when the piston moves, the total effective volumes of the rod cavity and the rodless cavity are the same, oil in the rodless cavity enters the rod cavity through the damping hole, the volume of the rod cavity is smaller than that of the rodless cavity, the pressure of the rod cavity is increased, the movable cylinder head is pushed to move leftwards, the volume of the rod cavity is increased, the oil flowing out of the rodless cavity is completely stored in the rod cavity, and the influence of an oil return pipeline on the buffering effect is removed; after the buffer stroke is finished and the piston returns, the volume of the rod cavity is reduced under the acting force of the spring, and oil in the rod cavity flows back to the rodless cavity through the damping hole.
The cylinder sleeve is positioned on the inner side of the cylinder body.
A one-way valve is arranged on the piston, so that the piston can be quickly reset.
4 groups of damping holes are uniformly distributed in the circumferential direction of the cylinder sleeve, 11 small holes with the diameter of 2mm and 1 small hole with the diameter of 8mm are arranged in the axial direction, and the hole spacing is selected between 10 mm and 38 mm; the excircle of the tail part of the rodless cavity is provided with 4 bosses uniformly distributed in the circumferential direction, so that the cylinder sleeve is prevented from deforming due to the rise of the buffer instant pressure.
The invention has the positive effects that: can be under the condition that need not connect any oil pipe, the effect of fine assurance buffering to when buffer pressure rises suddenly, effectual protection hydraulic cylinder body can not damaged by the impact, have simple structure, dismouting easy maintenance, longe-lived, the reliability is high. A movable cylinder head and the like.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view a-a in fig. 1.
In the figure: 1-cylinder body, 2-positioning ring, 3-movable cylinder head, 4-piston, 5-spring, 6-one-way valve, 7-cylinder bottom, 8-cylinder sleeve, 9-damping hole and 10-boss.
Detailed Description
The present invention will be further described with reference to the following examples.
Referring to fig. 1 and 2, a multi-damping hole type buffer hydraulic cylinder with a movable cylinder head comprises a cylinder body 1, a positioning ring 2, a movable cylinder head 3, a piston 4, a spring 5, a one-way valve 6, a cylinder bottom 7, a cylinder sleeve 8 and a damping hole 9; fluting on cylinder body 1, 2 one end cards of holding ring are in the fluting of cylinder body 1, the other end then links to each other with cylinder liner 8 is fixed, it is spacing to carry out piston 4, set up a movable cylinder head 3 on 2 left sides of holding ring, movable cylinder head 3 can remove in cylinder body 1, enlarge the variable volume of the moving range increase cylinder body 1 of piston 4, be provided with piston 4 pole with piston 4 fixed linking to each other on movable cylinder head left side, cylinder body 1 divide into according to the position of piston 4 pole has the pole chamber and does not have the pole chamber, be equipped with spring 5 on the piston 4 pole and be used for pneumatic cylinder piston 4 to reset, install cylinder liner 8 between holding ring 2 and cylinder bottom 7, open the outside of cylinder liner 8 has the unequal damping hole 9 of a plurality of intervals along the axial.
Sealing elements are arranged on the outer circles of the inner holes of the movable cylinder heads, so that the sealing property is ensured; the movable cylinder head can increase the volume of the rod cavity when the piston 4 performs a buffer stroke, so that when the piston 4 moves, the total effective volumes of the rod cavity and the rodless cavity are the same, oil in the rodless cavity enters the rod cavity through the damping hole, the volume of the rod cavity is smaller than that of the rodless cavity, the pressure of the rod cavity is increased, the movable cylinder head is pushed to move leftwards, the volume of the rod cavity is increased, the oil flowing out of the rodless cavity is completely stored in the rod cavity, and the influence of an oil return pipeline on the buffer effect is removed; after the buffer stroke is finished and the piston 4 returns, the volume of the rod cavity is reduced under the acting force of the spring, and oil in the rod cavity flows back to the rodless cavity through the damping hole.
The cylinder liner 8 is positioned inside the cylinder body 1.
A one-way valve 6 is provided on the piston 4 to allow quick resetting of the piston 4.
4 groups of damping holes 9 are uniformly distributed in the circumferential direction of the cylinder sleeve 8, 11 small holes with the diameter of 2mm and 1 small hole with the diameter of 8mm are arranged in the axial direction, and the hole distance is selected between 10 mm and 38 mm; the excircle of the tail part of the rodless cavity is provided with 4 bosses 10 which are uniformly distributed in the circumferential direction, so that the cylinder sleeve 8 is prevented from deforming due to the rise of the buffer instant pressure.
The hydraulic cylinder body can well ensure the buffering effect under the condition of not connecting any oil pipe, effectively protects the hydraulic cylinder body when the buffering pressure rises, cannot be damaged by impact, and has the advantages of simple structure, convenience in disassembly and maintenance, long service life and high reliability. A movable cylinder head and the like.
Claims (4)
1. The utility model provides a many damping pass buffering pneumatic cylinder of portable jar head in area which characterized in that: comprises a cylinder body, a positioning ring, a movable cylinder head, a piston, a spring, a one-way valve, a cylinder bottom, a cylinder sleeve and a damping hole; the piston is provided with a check valve, so that the piston can be quickly reset, the left side of the positioning ring is provided with a movable cylinder head which can move in the cylinder body, the moving range of the piston is enlarged, the variable volume of the cylinder body is increased, the left side of the movable cylinder head is provided with a piston rod fixedly connected with the piston, the cylinder body is divided into a rod cavity and a rodless cavity according to the position of the piston rod, the piston rod is provided with a spring for resetting the piston of the hydraulic cylinder, the spring is positioned on the left side of the movable cylinder head, the cylinder sleeve is arranged between the positioning ring and the cylinder bottom, and the outer side of the cylinder sleeve is provided with a plurality of damping holes with different intervals in the axial direction.
2. The multi-orifice cushion cylinder of claim 1 having a movable head, wherein: sealing elements are arranged on the outer circles of the inner holes of the movable cylinder heads, so that the sealing property is ensured; the movable cylinder head can increase the volume of the rod cavity when the piston performs a buffering stroke, so that when the piston moves, the total effective volumes of the rod cavity and the rodless cavity are the same, oil in the rodless cavity enters the rod cavity through the damping hole, the volume of the rod cavity is smaller than that of the rodless cavity, the pressure of the rod cavity is increased, the movable cylinder head is pushed to move leftwards, the volume of the rod cavity is increased, the oil flowing out of the rodless cavity is completely stored in the rod cavity, and the influence of an oil return pipeline on the buffering effect is removed; after the buffer stroke is finished and the piston returns, the volume of the rod cavity is reduced under the acting force of the spring, and oil in the rod cavity flows back to the rodless cavity through the damping hole.
3. The multi-orifice cushion cylinder of claim 1 having a movable head, wherein: the cylinder sleeve is positioned on the inner side of the cylinder body.
4. The multi-orifice cushion cylinder of claim 1 having a movable head, wherein: 4 groups of damping holes are uniformly distributed in the circumferential direction of the cylinder sleeve, 11 small holes with the diameter of 2mm and 1 small hole with the diameter of 8mm are arranged in the axial direction, and the hole spacing is selected between 10 mm and 38 mm;
the cylinder sleeve is arranged at the tail of the rodless cavity, and the outer cylinder surface of the cylinder sleeve is provided with 4 bosses uniformly distributed in the circumferential direction, so that the deformation of the cylinder sleeve caused by the rise of the buffer instant pressure is prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811025358.4A CN109026902B (en) | 2018-09-04 | 2018-09-04 | Multi-damping-hole-type buffer hydraulic cylinder with movable cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811025358.4A CN109026902B (en) | 2018-09-04 | 2018-09-04 | Multi-damping-hole-type buffer hydraulic cylinder with movable cylinder head |
Publications (2)
| Publication Number | Publication Date |
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| CN109026902A CN109026902A (en) | 2018-12-18 |
| CN109026902B true CN109026902B (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811025358.4A Active CN109026902B (en) | 2018-09-04 | 2018-09-04 | Multi-damping-hole-type buffer hydraulic cylinder with movable cylinder head |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307207B (en) * | 2019-06-25 | 2020-07-07 | 同济大学 | Cooling flow control device of hydraulic cylinder displacement sensor |
| CN110589696B (en) * | 2019-09-19 | 2021-03-02 | 青岛海西重机有限责任公司 | Steel wire rope luffing jib loading boom anti-falling device and crane |
| CN111022421B (en) * | 2019-12-16 | 2022-02-15 | 徐州徐工液压件有限公司 | Double-acting buffering hydraulic cylinder with external load absorption sleeve structure |
| CN114228769B (en) * | 2022-01-17 | 2023-06-06 | 中车青岛四方机车车辆股份有限公司 | Stop device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3817058C2 (en) * | 1988-05-19 | 1996-04-11 | Lisega Gmbh | Hydraulic shock brake for piping systems and. the like |
| CN101737376B (en) * | 2009-11-03 | 2012-08-15 | 宜昌市燕狮科技开发有限责任公司 | Low-speed bidirectional regulating hydraulic buffer |
| CN102278337A (en) * | 2011-09-05 | 2011-12-14 | 扬州扬宝机械有限公司 | hydraulic buffering cylinder |
| CN202468817U (en) * | 2012-03-07 | 2012-10-03 | 长春孔辉汽车科技有限公司 | Novel damper with adjustable damping |
| CN104791407A (en) * | 2015-04-27 | 2015-07-22 | 哈尔滨工程大学 | Passive hydraulic damping device |
| CN206017537U (en) * | 2016-08-31 | 2017-03-15 | 江门市大长江集团有限公司 | A kind of inversion type front damping device for motorcycle |
| CN207033881U (en) * | 2017-07-22 | 2018-02-23 | 广州市欧美嘉卫浴科技有限公司 | A kind of controllable cushion cylinder of hydraulic pressure |
| CN108317127A (en) * | 2018-04-11 | 2018-07-24 | 合肥长源液压股份有限公司 | Novel energy-storage hydraulic cylinder |
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2018
- 2018-09-04 CN CN201811025358.4A patent/CN109026902B/en active Active
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