CN103939420B - A kind of hydraulic cylinder perseverance throttling buffering device - Google Patents
A kind of hydraulic cylinder perseverance throttling buffering device Download PDFInfo
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- CN103939420B CN103939420B CN201310456852.7A CN201310456852A CN103939420B CN 103939420 B CN103939420 B CN 103939420B CN 201310456852 A CN201310456852 A CN 201310456852A CN 103939420 B CN103939420 B CN 103939420B
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- rear end
- cushion collar
- face
- end cap
- wall
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Abstract
A kind of hydraulic cylinder perseverance throttling buffering device, including the cushion collar being loaded on plunger stem flange front end；Cushion collar external diameter is less than piston external diameter.Cushion collar rear end face and the laminating of piston nose face；Along being provided with the conical surface in cushion collar rear end face；Cushion collar rear end face is provided with facing groove；Piston rod outer wall is provided with unit with grooves in outer wall.Hydraulic cylinder rear end cap is provided with recess；Equipped with sealing ring on cushion collar；Rear end cap is provided with oil duct；Oil duct is connected with hydraulic system through turnover oil duct.Oil duct is positioned at rear end cap inner face place and is provided with check valve.Piston, piston rod move together with buffer unit, and on cushion collar, sealing ring seals when moving to rear end cap recess, and cushion chamber inner fluid enters piston rod unit with grooves in outer wall by cushion collar facing groove, the cushion collar endoporus conical surface and plays throttling action.Compared with prior art, the present invention has simple in construction, and product is easily processed, delivery-check qualified rate height of product, defective recoverable feature.
Description
Technical field
The present invention is a kind of hydraulic cylinder perseverance throttling buffering device, and specifically during a kind of hydraulic cylinder works, pressure oil liquid promotes piston rod to move back and forth, when preventing piston rod movement from arriving bottom, speed, plays greater impact to connection equipment, at the buffer unit that tailpiece of the piston rod is installed.
Background technology
At present, known hydraulic cylinder perseverance throttling buffering device for have throttle orifice on rear end cap, rear end cap and cylinder body are Welding Structure, if completion of processing do experiment do not cushion or cushion inconspicuous, cannot repair, it is higher that early stage Theoretical Calculation and later stage machine are added requirement by this structure, if there are errors in computation or machine adds and is not reaching to requirement, all can cause do not cushion or cushion inconspicuous.
Summary of the invention
It is an object of the invention to overcome the deficiency of above-mentioned hydraulic cylinder throttling buffering device, it is provided that a kind of permanent throttling buffering device, this device can not only realize permanent throttling buffering, and without throttling buffering or throttling buffering inconspicuous time can repair.
The technical scheme is that the cushion collar including being loaded on plunger stem flange front end；Cushion collar external diameter is less than piston external diameter.
Hydraulic cylinder rear end cap is provided with the recess for coordinating with cushion collar；Equipped with the sealing ring sealed with rear end cap recesses fit on cushion collar；Rear end cap is communicated with recess bottom surface and the oil duct of rear end cap inner face；Described oil duct is connected with hydraulic system through turnover oil duct.
After sealing ring contacts with recess inner peripheral wall, the defined oil pocket in cushion collar outer wall and rear end cap inner face, hydraulic cylinder body inwall, piston nose face forms cushion chamber.
Oil duct be positioned at rear end cap inner face place be provided with prevent sealing ring on cushion collar from contacting with recess inner peripheral wall after cushion chamber inner fluid flow back to the check valve of hydraulic system through oil duct.
Cushion collar rear end face and the laminating of piston nose face；Along the conical surface being provided with for forming ring-type oil passage with piston nose face, piston rod outer circumference surface in cushion collar rear end face；Cushion collar rear end face is provided with and cooperatively forms end face oil passage with piston nose face to connect the facing groove of ring-type oil passage and cushion chamber；Described piston rod outer wall is provided with and cooperatively forms outer wall oil passage with cushion collar inwall to connect the unit with grooves in outer wall of ring-type oil passage and rear end cap inner face oil duct.
Described facing groove is one or more.
Described unit with grooves in outer wall is one or more.
Described unit with grooves in outer wall is V-shaped groove.
The described conical surface is the circumference conical surface.
Described sealing ring is O RunddichtringO.
Described rear end cap recess inwall and cushion collar outer wall are interference fits.
The fineness of described cushion collar outer wall and rear end cap recess inwall is Ra1.6.
Compared with prior art, the present invention has simple in construction, and product is easily processed, delivery-check qualified rate height of product, defective recoverable feature.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.(piston rod movement to the SOT state of termination)
Fig. 2 is the structural representation of the present invention.(on buffer unit, sealing ring entrance rear end cap seals)
Fig. 3 is the structural representation of the present invention.(buffer unit is introduced into rear end cap state)
Fig. 4 is the structural representation of cushion collar.
Fig. 5 is the A direction view of Fig. 4.
Fig. 6 is piston rod 2 partial structurtes schematic diagram.
Fig. 7 is the A-A cut-away view of Fig. 6.
Fig. 8 is the partial enlarged drawing of Fig. 3.
In figure, 1, cushion collar, 2, piston rod, 3, rear end cap, 4, facing groove, 5, sealing ring, 6, unit with grooves in outer wall, 7, piston, 8, recess, 9, cushion chamber, 10, check valve, 11, cylinder body, 12, turnover oil duct, 13, oil duct, 14, the conical surface, 15, oil duct, 16, fairlead, 17, ring-type oil passage.
Detailed description of the invention
In Fig. 1, piston 7 is arranged on piston rod 2 multidiameter (2-1), and cushion collar 1 is loaded on the piston rod 2 of piston 7 front end.Cushion collar 1 and piston rod 2 are threaded connection.Hydraulic cylinder rear end cap 3 is provided with the recess 8 for coordinating with cushion collar 1 outer wall；Equipped with the sealing ring 5 with rear end cap 3 recess 8 fitted seal on cushion collar 1 outer wall；Rear end cap 3 is communicated with recess 8 bottom surface and the oil duct 13 of rear end cap 3 inner face；Described oil duct 13 is connected with hydraulic system through turnover oil duct 12.After sealing ring 5 contacts with recess 8 inner peripheral wall, the defined oil pocket of cushion collar 1 outer wall and rear end cap 3 rear end face, hydraulic cylinder body 11 inwall, piston 7 front end face forms cushion chamber 9.Oil duct 13 be positioned at rear end cap 3 inner face place be provided with prevent sealing ring 5 on cushion collar 1 from contacting with recess 8 inner peripheral wall after cushion chamber 9 inner fluid flow back to the check valve 10 of hydraulic system through oil duct 13.Piston 7 front end face (7-2) and cushion collar 1 rear end face (1-1) laminating.Along the conical surface 14 being provided with for forming ring-type oil passage 17 with piston 7 front end face, piston rod 2 outer circumference surface in cushion collar 1 rear end face；Cushion collar 1 rear end face is provided with the facing groove 4 cooperatively forming end face oil passage with piston 7 front end face to connect ring-type oil passage 17 and cushion chamber 9；Described piston rod 2 outer wall is provided with the unit with grooves in outer wall 6 cooperatively forming outer wall oil passage with cushion collar 1 inwall to connect ring-type oil passage 17 and rear end cap 3 oil duct 13.Check valve 10 cylindrical has screw thread, and there is screw thread at oil duct 15 place in rear end cap 3 oil duct 13, and check valve 10 is threadeded with oil duct 15.Rear end cap 3 and cylinder body 11 are welded and fixed.Cylinder body 11 is connected with fairlead 16 bolt.The gap of cushion collar 1 outer wall and rear end cap 3 recess 8 inwall is interference fits H8/m7.
In Fig. 2, when external pressure fluid promotes piston 7, cushion collar 1 and piston rod 2 associated movement by fairlead 16 oil duct (16-1), when on cushion collar 1, sealing ring 5 enters rear end cap 3 recess 8, seal, check valve 10 is closed, fluid by cushion chamber 9 enter cushion collar 1 rear end face groove 4, ring-type oil passage 17, piston rod 2 unit with grooves in outer wall 6, rear end cap 3 oil duct 13, turnover oil duct 12 return to hydraulic system, the effect of throttling buffering can be reached, if buffering effect is undesirable, part individually can be repaired, reach buffer requirements.
In Fig. 3, when external pressure fluid passes in and out oil duct 12, oil duct 15 by rear end cap 3, pushing check valve 10 open, fluid promotes piston 7, cushion collar 1 and piston rod 2 associated movement, and cushion collar 1 leaves rear end cap 3 recess 8.
When external pressure fluid promotes piston 7, cushion collar 1 and piston rod 2 associated movement by fairlead 16 oil duct (16-1), when on cushion collar 1, sealing ring 5 is introduced into rear end cap 3 recess 8, fluid successively enters oil duct 13 by rear end cap 3 recess 8, turnover oil duct 12 returns to hydraulic system.
In Fig. 4, buffer unit includes cushion collar 1 and the sealing ring 5 being arranged on cushion collar 1, and sealing ring 5 is arranged on the cannelure of cushion collar 1.The conical surface 14 is opened in cushion collar 1 endoporus, and facing groove 4 is opened on the end face of cushion collar 1, and the fluid in cushion chamber 9 flows into the cushion collar 1 endoporus conical surface 14 from facing groove 4.In figure, R=1, a=1, d=4 ~ 5, e=20o.
In Fig. 5, facing groove 4 is opened on the end face of cushion collar 1, and the fluid in cushion chamber 9 flows into the cushion collar 1 endoporus conical surface 14 from facing groove 4.
In Fig. 6, Fig. 7, piston rod 2 end thread having unit with grooves in outer wall 6, the fluid in cushion chamber flows into the cushion collar 1 endoporus conical surface, unit with grooves in outer wall 6 by facing groove.In figure, b=2, c=1.
In Fig. 8, cushion collar 1 rear end face and piston rod 2 outer wall, cushion collar 1 conical surface 14 form ring-type oil passage 17.
Claims (8)
1. a hydraulic cylinder perseverance throttling buffering device, it is characterised in that: include the cushion collar (1) being loaded on piston rod (2) piston (7) front end；Cushion collar (1) external diameter is less than piston (7) external diameter；
Hydraulic cylinder rear end cap (3) is provided with the recess (8) for coordinating with cushion collar (1)；Equipped with the sealing ring (5) with rear end cap (3) recess (8) fitted seal on cushion collar (1)；Rear end cap (3) is communicated with the oil duct (13) of recess (8) bottom surface and rear end cap (3) inner face；Described oil duct (13) is connected with hydraulic system through turnover oil duct (12)；
After sealing ring (5) contacts with recess (8) inner peripheral wall, the defined oil pocket of cushion collar (1) outer wall and rear end cap (3) inner face, hydraulic cylinder body inwall, piston (7) front end face forms cushion chamber (9)；
Oil duct (13) be positioned at rear end cap (3) inner face place be provided with prevent the upper sealing ring (5) of cushion collar (1) from contacting with recess (8) inner peripheral wall after cushion chamber (9) inner fluid flow back to the check valve (10) of hydraulic system through oil duct (13)；
Cushion collar (1) rear end face and the laminating of piston (7) front end face；Along the conical surface (14) being provided with for forming ring-type oil passage (17) with piston (7) front end face, piston rod (2) outer circumference surface in cushion collar (1) rear end face；Cushion collar (1) rear end face is provided with and cooperatively forms end face oil passage with piston (7) front end face to connect the facing groove (4) of ring-type oil passage (17) and cushion chamber (9)；Described piston rod (2) outer wall is provided with and cooperatively forms outer wall oil passage with cushion collar (1) inwall to connect the unit with grooves in outer wall (6) of ring-type oil passage (17) and rear end cap (3) inner face oil duct (13).
2. hydraulic cylinder perseverance throttling buffering device according to claim 1, it is characterised in that: described facing groove (4) is for more than one.
3. hydraulic cylinder perseverance throttling buffering device according to claim 1, it is characterised in that: described unit with grooves in outer wall (6) is for more than one.
4. the hydraulic cylinder perseverance throttling buffering device according to claim 1 or 3, it is characterised in that: described unit with grooves in outer wall (6) is V-shaped groove.
5. hydraulic cylinder perseverance throttling buffering device according to claim 1, it is characterised in that: the described conical surface (14) is the circumference conical surface.
6. hydraulic cylinder perseverance throttling buffering device according to claim 1, it is characterised in that: described sealing ring (5) is O RunddichtringO.
7. hydraulic cylinder perseverance throttling buffering device according to claim 1, it is characterised in that: described rear end cap (3) recess (8) inwall and cushion collar (1) outer wall are interference fits.
8. hydraulic cylinder perseverance throttling buffering device according to claim 1, it is characterised in that: the fineness of described cushion collar (1) outer wall and rear end cap (3) recess (8) inwall is Ra1.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310456852.7A CN103939420B (en) | 2013-09-30 | 2013-09-30 | A kind of hydraulic cylinder perseverance throttling buffering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310456852.7A CN103939420B (en) | 2013-09-30 | 2013-09-30 | A kind of hydraulic cylinder perseverance throttling buffering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103939420A CN103939420A (en) | 2014-07-23 |
| CN103939420B true CN103939420B (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310456852.7A Active CN103939420B (en) | 2013-09-30 | 2013-09-30 | A kind of hydraulic cylinder perseverance throttling buffering device |
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| CN (1) | CN103939420B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115978045B (en) * | 2022-12-16 | 2024-01-23 | 泰兴欧曼液压科技有限公司 | Mold locking oil cylinder with good sealing effect |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0837250A2 (en) * | 1996-10-21 | 1998-04-22 | Robert Bosch Gmbh | Fluid actuator |
| CN201330768Y (en) * | 2008-12-05 | 2009-10-21 | 韶关液压件厂有限公司 | Floating type cushioning device for hydraulic cylinder |
| CN203214486U (en) * | 2013-03-08 | 2013-09-25 | 王越敏 | Hydraulic cylinder |
| CN203500175U (en) * | 2013-09-30 | 2014-03-26 | 湖北江山液压科技有限公司 | Constant throttling buffering device of hydraulic cylinder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004044705A (en) * | 2002-07-12 | 2004-02-12 | Nissan Diesel Motor Co Ltd | Hydraulic cylinder |
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2013
- 2013-09-30 CN CN201310456852.7A patent/CN103939420B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0837250A2 (en) * | 1996-10-21 | 1998-04-22 | Robert Bosch Gmbh | Fluid actuator |
| CN201330768Y (en) * | 2008-12-05 | 2009-10-21 | 韶关液压件厂有限公司 | Floating type cushioning device for hydraulic cylinder |
| CN203214486U (en) * | 2013-03-08 | 2013-09-25 | 王越敏 | Hydraulic cylinder |
| CN203500175U (en) * | 2013-09-30 | 2014-03-26 | 湖北江山液压科技有限公司 | Constant throttling buffering device of hydraulic cylinder |
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| Publication number | Publication date |
|---|---|
| CN103939420A (en) | 2014-07-23 |
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Effective date of registration: 20171225 Address after: 441004 Lianhua Road, Nissan Industrial Park, Xiangyang hi tech Zone, Hubei Province, No. 1 Patentee after: HUBEI JIANGSHAN HEAVY INDUSTRIES CO., LTD. Address before: 441004 Lianhua Road, high tech Industrial Zone, Hubei, Xiangfan, No. 1 Patentee before: Hubei Jiangshan Hydraulic Technology Co., Ltd. |
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Address after: 441057 No.5, zhuiri Road, high tech Zone, Xiangyang City, Hubei Province Patentee after: China Ordnance Industry Group Jiangshan Heavy Industry Research Institute Co.,Ltd. Address before: 441004 Lianhua Road, Nissan Industrial Park, Xiangyang hi tech Zone, Hubei Province, No. 1 Patentee before: HUBEI JIANGSHAN HEAVY INDUSTRIES Co.,Ltd. |