CN101915252A - Buffer starting structure for oil cylinder rodless cavity - Google Patents
Buffer starting structure for oil cylinder rodless cavity Download PDFInfo
- Publication number
- CN101915252A CN101915252A CN 201010257832 CN201010257832A CN101915252A CN 101915252 A CN101915252 A CN 101915252A CN 201010257832 CN201010257832 CN 201010257832 CN 201010257832 A CN201010257832 A CN 201010257832A CN 101915252 A CN101915252 A CN 101915252A
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- oil
- piston rod
- buffer
- cylinder body
- cylinder
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Abstract
The invention discloses a buffer starting structure for an oil cylinder rodless cavity. The head of a piston rod extended into a cylinder body is connected with a piston; the front end of the head of the piston rod is provided with a buffer pin; the bottom in the cylinder body is provided with a buffer hole matched with the buffer pin; the cylinder body is provided with an oil introducing hole which is communicated with the buffer hole and an oil replenishing passage which is communicated with the buffer hole and the cavity of the cylinder body; and the port where the oil replenishing passage is communicated with the buffer hole is provided with a one-way throttle valve. When the piston rod travels close to the cylinder bottom, the buffer pin is matched with the buffer hole for buffering; when the piston rod completely moves to the cylinder bottom and the piston rod needs to be withdrawn by hydraulic oil, the hydraulic oil is introduced through the oil introducing hole; and the hydraulic oil applies pressure to the piston rod from the part of the buffer hole and enters the cavity of the cylinder body from the oil replenishing passage by opening the one-way throttle valve so as to apply pressure to the piston; and thus the starting pressure of the oil cylinder can be reduced to a large extent.
Description
Technical field
The present invention relates to a kind of oil cylinder, specifically a kind of buffer starting structure for oil cylinder rodless cavity.
Background technique
The buffer structure of existing a kind of oil cylinder rodless cavity is: the head that stretches into the piston rod in the cylinder body is connected with piston, the front end of piston rod head is equipped with cushion pins, bottom in the cylinder body has the cushion hole that cooperates with cushion pins, has the oil through that communicates with cushion hole on the cylinder body.Because this oil cylinder is when piston rod is walked near cylinder bottom, by cushioning cushion pins and cooperating of cushion hole, the problem of bringing thus is: cushion pins and cushion hole matching gap are less, in the time of after piston rod advances to cylinder bottom fully, need ejecting piston rod by hydraulic oil again, only depend on from the outside and by the hydraulic oil that oil through enters and push piston open, then need very high starting pressure from the cushion hole position.
Summary of the invention
The object of the present invention is to provide a kind of buffer starting structure for oil cylinder rodless cavity, this buffer starting structure can make the starting pressure of oil cylinder less.
For achieving the above object, the present invention adopts following scheme: buffer starting structure for oil cylinder rodless cavity, the head that stretches into the piston rod in the cylinder body is connected with piston, the front end of piston rod head is equipped with cushion pins, bottom in the cylinder body has the cushion hole that cooperates with cushion pins, have the oil through that communicates with cushion hole on the cylinder body, be provided with the repairing passage that is communicated with cushion hole and inner chamber of cylinder block on cylinder body, the port that communicates with cushion hole at the repairing passage is provided with one-way throttle valve.
By such scheme as seen, when piston rod is walked near cylinder bottom, earlier by cushioning cushion pins and cooperating of cushion hole, this moment, fluid had seldom a part pass through from one-way throttle valve, in the time of after piston rod advances to cylinder bottom fully, need ejecting piston rod by hydraulic oil again, feed hydraulic oil from oil through, hydraulic oil can be exerted pressure to piston rod from the cushion hole position first, second can open one-way throttle valve exerts pressure to piston from the inner chamber that the repairing passage enters into cylinder body, so, the starting pressure of oil cylinder is reduced largely.
The present invention is rational in infrastructure, reliable, and its starting pressure is little, and the performance of continuous action is good, and can effectively improve the working life of pump in the hydraulic system, valve.
Description of drawings
Accompanying drawing is the structural drawing of one embodiment of the invention.
Embodiment
Further specify the present invention below in conjunction with embodiment and accompanying drawing.
Referring to accompanying drawing
Buffer starting structure for oil cylinder rodless cavity provided by the invention is: piston 3 is connected in the head that stretches into the piston rod 4 in the cylinder body 1, the front end of piston rod 4 heads is equipped with cushion pins 2, bottom in the cylinder body 1 has the cushion hole 1b that cooperates with cushion pins 2, have the oil through 1a that communicates with cushion hole 1b on the cylinder body 1, be provided with the repairing passage 1c that is communicated with cushion hole 1b and inner chamber of cylinder block on cylinder body 1, the port that communicates with cushion hole 1b at repairing passage 1c is provided with one-way throttle valve 5.
By accompanying drawing as seen, piston rod 4 is to when retraction, and one-way throttle valve 5 is in throttle, when piston rod 4 is walked bottom near cylinder body 1, by cushioning cushion pins 2 and cooperating of cushion hole 1b; When piston rod 4 advances to when needing to stretch out again after cylinder bottom stops, pass through oil through 1a to cushion hole 1b fuel feeding by the external world, hydraulic oil can be exerted pressure to piston rod, from cushion hole 1b position simultaneously, one-way throttle valve 5 is opened, and hydraulic oil directly enters in the cylinder body 1 by repairing passage 1c and exerts pressure to piston 3.
Claims (1)
1. buffer starting structure for oil cylinder rodless cavity, the head that stretches into the piston rod in the cylinder body is connected with piston, the front end of piston rod head is equipped with cushion pins, bottom in the cylinder body has the cushion hole that cooperates with cushion pins, have the oil through that communicates with cushion hole on the cylinder body, it is characterized in that: be provided with the repairing passage that is communicated with cushion hole and inner chamber of cylinder block on cylinder body, the port that communicates with cushion hole at the repairing passage is provided with one-way throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010257832 CN101915252A (en) | 2010-08-20 | 2010-08-20 | Buffer starting structure for oil cylinder rodless cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010257832 CN101915252A (en) | 2010-08-20 | 2010-08-20 | Buffer starting structure for oil cylinder rodless cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101915252A true CN101915252A (en) | 2010-12-15 |
Family
ID=43322842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010257832 Pending CN101915252A (en) | 2010-08-20 | 2010-08-20 | Buffer starting structure for oil cylinder rodless cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101915252A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358741A (en) * | 2014-10-30 | 2015-02-18 | 蚌埠市行星工程机械有限公司 | Hydraulic oil cylinder with buffering function |
| CN106151160A (en) * | 2015-04-28 | 2016-11-23 | 徐工集团工程机械股份有限公司 | There is hydraulic jack and the excavator of pooling feature |
| CN110332176A (en) * | 2019-08-01 | 2019-10-15 | 邵玉强 | A kind of hydraulic cylinder with pooling feature |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904393A (en) * | 2005-07-25 | 2007-01-31 | Smc株式会社 | Fluid pressure cylinder apparatus having throttle valve |
| CN2876398Y (en) * | 2006-02-20 | 2007-03-07 | 宝山钢铁股份有限公司 | Fast starting and braking device of high speed oil cylinder |
| CN201347919Y (en) * | 2008-12-05 | 2009-11-18 | 韶关液压件厂有限公司 | Hydraulic cylinder with integrated one-way throttling device |
| CN201739261U (en) * | 2010-08-20 | 2011-02-09 | 蚌埠天地重型机械制造股份有限公司 | Rodless cavity buffer starting structure of oil cylinder |
-
2010
- 2010-08-20 CN CN 201010257832 patent/CN101915252A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904393A (en) * | 2005-07-25 | 2007-01-31 | Smc株式会社 | Fluid pressure cylinder apparatus having throttle valve |
| CN2876398Y (en) * | 2006-02-20 | 2007-03-07 | 宝山钢铁股份有限公司 | Fast starting and braking device of high speed oil cylinder |
| CN201347919Y (en) * | 2008-12-05 | 2009-11-18 | 韶关液压件厂有限公司 | Hydraulic cylinder with integrated one-way throttling device |
| CN201739261U (en) * | 2010-08-20 | 2011-02-09 | 蚌埠天地重型机械制造股份有限公司 | Rodless cavity buffer starting structure of oil cylinder |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358741A (en) * | 2014-10-30 | 2015-02-18 | 蚌埠市行星工程机械有限公司 | Hydraulic oil cylinder with buffering function |
| CN106151160A (en) * | 2015-04-28 | 2016-11-23 | 徐工集团工程机械股份有限公司 | There is hydraulic jack and the excavator of pooling feature |
| CN106151160B (en) * | 2015-04-28 | 2018-05-01 | 徐工集团工程机械股份有限公司 | Hydraulic cylinder and excavator with pooling feature |
| CN110332176A (en) * | 2019-08-01 | 2019-10-15 | 邵玉强 | A kind of hydraulic cylinder with pooling feature |
| CN110332176B (en) * | 2019-08-01 | 2020-07-07 | 湖南星科液压有限公司 | Hydraulic cylinder with buffering function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101215 |