CN201991879U - Hydraulic cylinder buffering device - Google Patents
Hydraulic cylinder buffering device Download PDFInfo
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- CN201991879U CN201991879U CN2011201182649U CN201120118264U CN201991879U CN 201991879 U CN201991879 U CN 201991879U CN 2011201182649 U CN2011201182649 U CN 2011201182649U CN 201120118264 U CN201120118264 U CN 201120118264U CN 201991879 U CN201991879 U CN 201991879U
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- high pressure
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- cylinder
- cylinder cover
- cavity
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Abstract
The utility model relates to a hydraulic cylinder buffering device, which is provided with a cylinder body, a cylinder cover and a piston, wherein the piston is provided with a lug boss, the cylinder cover is provided with a concave cavity and a main oil channel which is communicated with the concave cavity, the lug boss is in a conical shape, the shape of the concave cavity on the cylinder cover is matched with that of the lug boss, the cylinder cover is provided with a high pressure oil leakage passage, one end of the high pressure oil leakage passage is communicated with the main oil channel, the other end of the high pressure oil leakage passage is communicated with an oil cavity between the cylinder cover and the piston, and a retaining valve core is arranged inside the high pressure oil leakage passage. The piston of the buffering device is matched with the concave cavity on the cylinder cover through a conical surface, so when the lug boss on the piston enters the concave cavity of the cylinder cover which is matched with the piston, the through-flow cross section is gradually reduced, and the buffering effect can be improved. The cylinder cover is provided with the high pressure oil leakage passage, and the interior of the high pressure oil leakage passage is provided with the retaining valve core, so the over-high pressure of the hydraulic oil can be prevented from damaging the hydraulic cylinder. The hydraulic cylinder buffering device has a simple structure and low cost.
Description
Technical field
The utility model relates to cylinder cushion device.
Background technique
Oil hydraulic cylinder or air pressure cylinder cushion are the vitals of realizing workpiece smooth working, protection hydraulic pipe line.Shown in Figure 1 is traditional annular gap formula damping device.Have cylinder body 1, cylinder cap 3 and piston 2.Described piston 2 is provided with boss 2-1.The main oil gallery 3-2 that described cylinder cap 3 is provided with cavity 3-1 and communicates with cavity 3-1.When the boss 2-1 on the piston 2 enters among the cavity 3-1 of associated cylinder cap 3, the hydraulic oil that is enclosed in the oil pocket 1-1 between piston and the cylinder cap must just can be extruded by annular gap δ, velocity of piston is reduced, because annular gap δ immobilizes, just passage section is constant, though buffer function weakens gradually along with the reduction of piston movement speed, but stationarity not enough, and when hydraulic fluid pressure was too high, pressure discharged nowhere, can cause damage to oil hydraulic cylinder.
Summary of the invention
The purpose of this utility model is to propose a kind ofly can further strengthen buffer function and prevent the cylinder cushion device that oil hydraulic cylinder is impaired.
For achieving the above object, the utility model is taked following technological scheme:
A kind of cylinder cushion device, have cylinder body, cylinder cap and piston, described piston is provided with boss, the main oil gallery that described cylinder cap is provided with cavity and communicates with cavity, described boss are round table-like, and the shape of the cavity on the described cylinder cap and the shape of boss are complementary, cylinder cap is provided with high pressure draining passage, one end of high pressure draining passage communicates with main oil gallery, and the other end communicates with oil pocket between cylinder cap and the piston, is provided with nonreturn valve core in the high pressure draining passage.
Described nonreturn valve core comprises hollow bolt, sealing ball and spring.
The utlity model has following good effect: piston of this damping device and cylinder cap are provided with cavity and adopt cone match, and when the boss on the piston entered the cavity of associated cylinder cap, passage section diminished gradually, improve buffer function.And cylinder cap is provided with high pressure draining passage, in be provided with nonreturn valve core, can prevent from that hydraulic fluid pressure is too high oil hydraulic cylinder is caused damage.This apparatus structure is simple, and is with low cost.
Description of drawings
Fig. 1 is traditional annular gap formula damping device diagrammatic sketch.
Fig. 2 is a diagrammatic sketch of the present utility model.
Fig. 3 is the I portion enlarged view of Fig. 2.
Embodiment
Embodiment 1
See Fig. 2 and Fig. 3, present embodiment has cylinder body 1, cylinder cap 3 and piston 2.Described piston 2 is provided with boss 2-1, the main oil gallery 3-2 that described cylinder cap 3 is provided with cavity 3-1 and communicates with cavity 3-1.Described boss 2-1 is round table-like, is the little upper bottom surface of surface area towards an end of cylinder cap 3, the round table-like cavity that the shape of the cavity 3-1 on the described cylinder cap 3 and the shape of boss 2-1 are complementary.Cylinder cap 3 is provided with high pressure draining passage 3-3, and the end of high pressure draining passage 3-3 communicates with main oil gallery 3-2, and the other end communicates with oil pocket 1-1 between cylinder cap 3 and the piston 2.High pressure draining passage 3-3 is a stepped shaft, is provided with nonreturn valve core 4 in the large-diameter portion of stepped shaft high pressure draining passage 3-3.Described nonreturn valve core 4 comprises hollow bolt 4-1, ball sealer 4-2 and spring 4-3.The bolt head of hollow bolt 4-1 is interior hexagonal or internal regular polygon.Spring pressure is regulated by hollow bolt 4-1, and the pressure in cylinder body 1 is greater than above-mentioned spring pressure, and hydraulic oil is pushed ball sealer open by the passage of hollow bolt 4-1, enters main oil gallery by high pressure draining passage 3-3 and releases.
The foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to mode of execution of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description, can select different mechanical drive mode combinations according to actual conditions as each transmission device in the utility model, no longer all mode of executions be given an example here.These belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.
Claims (2)
1. cylinder cushion device, has cylinder body (1), cylinder cap (3) and piston (2), described piston (2) is provided with boss (2-1), the main oil gallery (3-2) that described cylinder cap (3) is provided with cavity (3-1) and communicates with cavity (3-1), it is characterized in that: described boss (2-1) is for round table-like, the shape of the cavity (3-1) on the described cylinder cap (3) and the shape of boss (2-1) are complementary, cylinder cap (3) is provided with high pressure draining passage (3-3), one end of high pressure draining passage (3-3) communicates with main oil gallery (3-2), the other end communicates with oil pocket (1-1) between cylinder cap (3) and the piston (2), is provided with nonreturn valve core (4) in the high pressure draining passage (3-3).
2. cylinder cushion device according to claim 1 is characterized in that: described nonreturn valve core (4) comprises hollow bolt (4-1), ball sealer (4-2) and spring (4-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201182649U CN201991879U (en) | 2011-04-20 | 2011-04-20 | Hydraulic cylinder buffering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201182649U CN201991879U (en) | 2011-04-20 | 2011-04-20 | Hydraulic cylinder buffering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201991879U true CN201991879U (en) | 2011-09-28 |
Family
ID=44668368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201182649U Expired - Fee Related CN201991879U (en) | 2011-04-20 | 2011-04-20 | Hydraulic cylinder buffering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201991879U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041769A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Fast-extending and slow-contracting hydraulic cylinder |
| CN105041770A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder with quick-start starting characteristic |
| CN105964975A (en) * | 2016-05-04 | 2016-09-28 | 蚌埠隆华压铸机有限公司 | Hydraulic die locking device for die assembly of die casting machine |
| CN106715923A (en) * | 2014-11-26 | 2017-05-24 | 三菱日立电力系统株式会社 | Hydraulic drive device for steam valve, combined steam valve and steam turbine |
| CN106704288A (en) * | 2015-07-14 | 2017-05-24 | 徐工集团工程机械股份有限公司 | Hydraulic cylinder buffering structure and engineering machine with hydraulic cylinder buffering structure |
| CN107130564A (en) * | 2017-06-27 | 2017-09-05 | 严登丰 | Hydraulic-operated Automatic Gate water pressure buffer |
| CN108799252A (en) * | 2018-08-06 | 2018-11-13 | 山西航天清华装备有限责任公司 | The adjustable hydraulic cylinder of bidirectional buffering speed |
| CN110848196A (en) * | 2019-11-28 | 2020-02-28 | 河南航天液压气动技术有限公司 | Hydraulic control valve |
-
2011
- 2011-04-20 CN CN2011201182649U patent/CN201991879U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10605116B2 (en) | 2014-11-26 | 2020-03-31 | Mitsubishi Hitachi Power Systems, Ltd. | Hydraulic driving device for steam valve, combined steam valve, and steam turbine |
| CN106715923A (en) * | 2014-11-26 | 2017-05-24 | 三菱日立电力系统株式会社 | Hydraulic drive device for steam valve, combined steam valve and steam turbine |
| CN106704288A (en) * | 2015-07-14 | 2017-05-24 | 徐工集团工程机械股份有限公司 | Hydraulic cylinder buffering structure and engineering machine with hydraulic cylinder buffering structure |
| CN106704288B (en) * | 2015-07-14 | 2018-09-04 | 徐工集团工程机械股份有限公司 | Hydraulic cylinder and engineering machinery with the hydraulic cylinder |
| CN105041770A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder with quick-start starting characteristic |
| CN105041769A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Fast-extending and slow-contracting hydraulic cylinder |
| CN105964975A (en) * | 2016-05-04 | 2016-09-28 | 蚌埠隆华压铸机有限公司 | Hydraulic die locking device for die assembly of die casting machine |
| CN107130564A (en) * | 2017-06-27 | 2017-09-05 | 严登丰 | Hydraulic-operated Automatic Gate water pressure buffer |
| CN107130564B (en) * | 2017-06-27 | 2022-08-23 | 严登丰 | Hydraulic buffer for hydraulic automatic door |
| CN108799252A (en) * | 2018-08-06 | 2018-11-13 | 山西航天清华装备有限责任公司 | The adjustable hydraulic cylinder of bidirectional buffering speed |
| CN108799252B (en) * | 2018-08-06 | 2024-04-16 | 山西航天清华装备有限责任公司 | Hydraulic cylinder with adjustable bidirectional buffering speed |
| CN110848196A (en) * | 2019-11-28 | 2020-02-28 | 河南航天液压气动技术有限公司 | Hydraulic control valve |
| CN110848196B (en) * | 2019-11-28 | 2021-11-23 | 河南航天液压气动技术有限公司 | Hydraulic control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: JIANGSU JUBANG ENVIRONMENT ENGINEERING GROUP CO., LTD. Assignor: Jiangsu Teachers University of Technology Contract record no.: 2013320000637 Denomination of utility model: Buffering device for hydraulic cylinder Granted publication date: 20110928 License type: Exclusive License Record date: 20130709 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20150420 |
|
| EXPY | Termination of patent right or utility model |