CN102654153B - Buffering device for plunger hydraulic cylinder - Google Patents
Buffering device for plunger hydraulic cylinder Download PDFInfo
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- CN102654153B CN102654153B CN201210163809.7A CN201210163809A CN102654153B CN 102654153 B CN102654153 B CN 102654153B CN 201210163809 A CN201210163809 A CN 201210163809A CN 102654153 B CN102654153 B CN 102654153B
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- piston
- piston rod
- check valve
- valve seat
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Abstract
The invention discloses a buffering device for a plunger hydraulic cylinder. The buffering device comprises a cylinder barrel, a front end cover and a back end cover, wherein a piston and a piston rod are arranged in the cylinder barrel; the piston rod extends out from the cylinder barrel and is welded with a check valve base; a check valve hole capable of mounting of a check valve is arranged in the check valve base; the piston rod is a hollow piston rod; an oil inlet and a first through hole communicated with the check valve hole are arranged on the check valve base; a first hole is communicated with an inner hole of the piston rod; a second through hole communicated with the inner hole of the piston rod is arranged at the center of the piston; a one-way valve base is fixedly connected with the inner side of the back end cover; a one-way valve core is arranged in the one-way valve base; the head of the one-way valve core can block the second through hole; a spring is arranged between the head of the one-way valve core and the one-way valve base; a third through hole which is parallel to the second through hole is arranged on the piston; and a throttling device is internally threaded to a third through hole. The buffering device for the plunger hydraulic cylinder disclosed by the invention has the advantages of good buffering effect, simple manufacturing process, adjustable buffering time and high reliability.
Description
Technical field
The present invention relates to a kind of cylinder cushion device, particularly relate to a kind of for compression garbage truck lift ram hydraulic pressure cylinder cushion.
Background technique
Compression garbage truck lift ram oil hydraulic cylinder is in the time of Bottom Of Descent, and the new oil hydraulic cylinder cushioning effect having is just undesirable, and with increasing service time, cushioning effect reduces some oil hydraulic cylinders, causes compression garbage truck vibrations very large.
Therefore those skilled in the art are devoted to develop a kind of good buffer effect and stable plunger piston fluid pressure cylinder damping device, reduce the vibrations of compression garbage truck when the lift ram oil hydraulic cylinder Bottom Of Descent to meet.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide a kind of good buffer effect and stable plunger piston fluid pressure cylinder damping device.
For achieving the above object, the invention provides a kind of plunger piston fluid pressure cylinder damping device, comprise cylinder barrel, front cover and rear end cover; In described cylinder barrel, be provided with piston and piston rod; Described piston rod stretches out described cylinder barrel and is welded with Boilor check valve seat at external part; In described Boilor check valve seat, be provided with the safety check valve opening that safety check can be installed; Described piston rod is hollow piston rod; On described Boilor check valve seat, be provided with the oil inlet hole and the first through hole that communicate with described safety check valve opening; Described the first through hole communicates with the endoporus of described piston rod;
The center of described piston is provided with the second through hole communicating with the endoporus of described piston rod; The inner side of described rear end cover is fixedly connected with one-way valve seat; In described one-way valve seat, be provided with nonreturn valve core; The head of described nonreturn valve core can shutoff described in the second through hole; Between the head of described nonreturn valve core and described one-way valve seat, be provided with spring;
On described piston, be provided with the third through-hole parallel with described the second through hole; Described third through-hole internal thread is connected with throttling.
Preferably, for further improving cushioning effect, described spring is tapered coil spring.
Preferably, the head of described nonreturn valve core is provided with conical structure.
Preferably, described piston rod is connected with described piston thread; Described cylinder barrel is threaded with described front cover and rear end cover; Described one-way valve seat is threaded with described rear end cover.
For avoiding piston rod to produce and rock at the volley, on the appearance integral of described piston, be two-stage stepped; The smaller diameter end of described piston stretches in described piston rod and coordinates with described piston rod thread; The internal surface of described cylinder barrel is fixed with guide ring; Described guide ring coordinates with the larger diameter end of described piston; The outer surface of described piston larger diameter end is provided with at least one plane vertically; Described plane and described guide ring form oil groove.
Preferably, the internal surface of described cylinder barrel is arranged at intervals with two described guide rings; The outer surface of described piston is uniform is provided with 6 described planes.
The invention has the beneficial effects as follows:
(1) owing to not coordinating buffer gap, therefore can greatly reduce processing technology cost;
(2) can be by throttling of replacing different pore size to adjust buffer time;
(3) because be 100,000 the working life of one-way valve, therefore cushioning effect is durable in use, can not reduce with oil hydraulic cylinder lengthening service time;
(4) overall structure is simple, manufactures simple.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the partial enlarged drawing at I place in Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1 to Figure 3, a kind of plunger piston fluid pressure cylinder damping device, comprises cylinder barrel 7, front cover 18 and rear end cover 15.In cylinder barrel 7, be provided with piston 4 and piston rod 8, piston rod 8 stretches out cylinder barrel 7 and is welded with Boilor check valve seat 9 at external part, is provided with the safety check valve opening 10 that safety check can be installed in Boilor check valve seat 9.
Piston rod 8 is hollow piston rod, is provided with the oil inlet hole 11 and the first through hole 12, the first through holes 12 that communicate with safety check valve opening 10 and communicates with the endoporus 8a of piston rod 8 on Boilor check valve seat 9.
The center of piston 4 is provided with the second through hole 13 communicating with the endoporus 8a of piston rod, the inner side of rear end cover 15 is fixedly connected with one-way valve seat 6, in one-way valve seat 6, be provided with nonreturn valve core 3, the head 3a of nonreturn valve core can shutoff the second through hole 13, between the head 3a of nonreturn valve core and one-way valve seat 6, is provided with tapered coil spring 5.
On piston 4, be provided with the third through-hole 14 parallel with the second through hole 13, third through-hole 14 internal threads are connected with throttling 2.
In the present embodiment, the head 3a of nonreturn valve core is conical structure.
In the present embodiment, piston rod 8 is threaded with piston 4, and cylinder barrel 7 is threaded with front cover 18 and rear end cover 15, and one-way valve seat 6 is threaded with rear end cover 15.
On the appearance integral of piston 4, be two-stage stepped.The smaller diameter end of piston 4 stretches in piston rod 8 and coordinates with piston rod thread.The internal surface interval of cylinder barrel 7 is fixed with two guide rings 16, and guide ring 16 coordinates with the larger diameter end of piston 4.The outer surface of piston 4 larger diameter ends is uniform is vertically provided with 6 plane 4a, and plane 4a and guide ring 16 form oil groove 17.
Solenoid check valve is inserted to safety check valve opening 10.When hydraulic cylinder works, piston rod 8 stretches out movement process: hydraulic oil from oil inlet hole 11 to slotting formula solenoid check valve (normally closed) through the first through hole 12, through hollow piston rod 8 to second through holes 13 and throttling 2, promote piston rod 8 and start fast, piston rod 8 is done and stretch out motion.
Piston rod recovery movement process is: insert formula solenoid check valve (normally closed) electric after, hydraulic oil through the second through hole 13(now inner elements of check valve throw off) and the aperture of throttling 2 to hollow piston rod 8, then arrive oil inlet hole 11 through slotting formula solenoid check valve (normally closed); In the time that piston 4 moves to nonreturn valve core 3, the second through hole 13 is closed gradually, and hydraulic oil only passes through from the aperture of throttling 2, thereby piston rod 8 is slowed down.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all technician in the art, all should be in by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technological scheme of logical analysis, reasoning, or a limited experiment.
Claims (6)
1. a plunger piston fluid pressure cylinder damping device, comprises cylinder barrel (7), front cover (18) and rear end cover (15); In described cylinder barrel (7), be provided with piston (4) and piston rod (8); Described piston rod (8) stretches out described cylinder barrel (7) and is welded with Boilor check valve seat (9) at external part; In described Boilor check valve seat (9), be provided with the safety check valve opening (10) that safety check can be installed; It is characterized in that: described piston rod (8) is hollow piston rod; On described Boilor check valve seat (9), be provided with the oil inlet hole (11) and the first through hole (12) that communicate with described safety check valve opening (10); Described the first through hole (12) communicates with the endoporus (8a) of described piston rod (8);
The center of described piston (4) is provided with the second through hole (13) communicating with the endoporus (8a) of described piston rod; The inner side of described rear end cover (15) is fixedly connected with one-way valve seat (6); In described one-way valve seat (6), be provided with nonreturn valve core (3); The head (3a) of described nonreturn valve core can shutoff described in the second through hole (13); Between the head (3a) of described nonreturn valve core and described one-way valve seat (6), be provided with spring (5);
On described piston (4), be provided with the third through-hole (14) parallel with described the second through hole (13); Described third through-hole (14) internal thread is connected with throttling (2).
2. plunger piston fluid pressure cylinder damping device as claimed in claim 1, is characterized in that: described spring (5) is tapered coil spring.
3. plunger piston fluid pressure cylinder damping device as claimed in claim 1 or 2, is characterized in that: the head (3a) of described nonreturn valve core is provided with conical structure.
4. plunger piston fluid pressure cylinder damping device as claimed in claim 1 or 2, is characterized in that: described piston rod (8) is threaded with described piston (4); Described cylinder barrel (7) is threaded with described front cover (18) and rear end cover (15); Described one-way valve seat (6) is threaded with described rear end cover (15).
5. plunger piston fluid pressure cylinder damping device as claimed in claim 1 or 2, is characterized in that: on the appearance integral of described piston (4), be two-stage stepped; The smaller diameter end of described piston (4) stretches in described piston rod (8) and coordinates with described piston rod thread; The internal surface of described cylinder barrel (7) is fixed with guide ring (16); Described guide ring (16) coordinates with the larger diameter end of described piston (4); The outer surface of described piston (4) larger diameter end is provided with at least one plane (4a) vertically; Described plane (4a) forms oil groove (17) with described guide ring (16).
6. plunger piston fluid pressure cylinder damping device as claimed in claim 5, is characterized in that: the internal surface of described cylinder barrel (7) is arranged at intervals with two described guide rings (16); Uniform 6 the described planes (4a) that are provided with of outer surface of described piston (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210163809.7A CN102654153B (en) | 2012-05-24 | 2012-05-24 | Buffering device for plunger hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210163809.7A CN102654153B (en) | 2012-05-24 | 2012-05-24 | Buffering device for plunger hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102654153A CN102654153A (en) | 2012-09-05 |
| CN102654153B true CN102654153B (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210163809.7A Active CN102654153B (en) | 2012-05-24 | 2012-05-24 | Buffering device for plunger hydraulic cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN102654153B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654542A (en) * | 2017-10-11 | 2018-02-02 | 长治市潞安合力机械有限责任公司 | A kind of fast discharge opeing compressing cylinder of monorail crane |
| CN108083186B (en) * | 2017-12-31 | 2024-02-02 | 蚌埠液力机械有限公司 | Forklift cylinder buffer structure |
| CN109595220B (en) * | 2018-12-21 | 2023-12-05 | 中船重工中南装备有限责任公司 | Slowly-closed hydraulic cylinder |
| CN110159612A (en) * | 2019-06-26 | 2019-08-23 | 三一重型装备有限公司 | Telescoping cylinder and telescope support |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006666A (en) * | 1975-05-22 | 1977-02-08 | Towmotor Corporation | Cushioning device for a hydraulic jack |
| DE20213023U1 (en) * | 2002-08-24 | 2003-01-09 | Schlutz Heinz | End of travel damping piston for hydraulic piston and cylinder unit engages wall of cylinder and sides of main piston, and has spring and stop mechanism |
| JP2005163917A (en) * | 2003-12-03 | 2005-06-23 | Toyota Industries Corp | Hydraulic cylinder in industrial vehicle |
| CN101504019B (en) * | 2008-12-17 | 2012-05-02 | 国营第三八八厂 | Permanent magnet buffering hydraulic cylinder |
| CN201559562U (en) * | 2009-11-28 | 2010-08-25 | 重汽集团专用汽车公司 | Hydraulic cylinder slow-down buffer for dumper |
| CN201908889U (en) * | 2010-12-20 | 2011-07-27 | 长治清华机械厂 | Variable-throttling buffer hydraulic cylinder |
| CN202659628U (en) * | 2012-05-24 | 2013-01-09 | 重庆迪马工业有限责任公司 | Buffer device for hydraulic cylinder of plunger |
-
2012
- 2012-05-24 CN CN201210163809.7A patent/CN102654153B/en active Active
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| CN102654153A (en) | 2012-09-05 |
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