CN203362691U - Oil return device of piston type oil cylinder - Google Patents
Oil return device of piston type oil cylinder Download PDFInfo
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- CN203362691U CN203362691U CN 201320407520 CN201320407520U CN203362691U CN 203362691 U CN203362691 U CN 203362691U CN 201320407520 CN201320407520 CN 201320407520 CN 201320407520 U CN201320407520 U CN 201320407520U CN 203362691 U CN203362691 U CN 203362691U
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- oil
- cylinder
- spring
- chamber
- way valve
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Abstract
An oil return device of a piston type oil cylinder comprises a cylinder body of the oil cylinder. A piston and a piston rod are arranged in the cylinder body, the end portion of the piston rod is connected with the piston in a sealed mode, and the cylinder body is divided into a working cavity and a non-working cavity through the piston. The oil return device is characterized in that a one-way valve which can discharge hydraulic oil in the non-working cavity of the cylinder body into the working cavity is arranged on the end portion of the piston rod. The working cavity and the non-working cavity of the oil cylinder are connected by installing the one-way valve on the piston rod of the oil cylinder, and the one-way valve is in a closed state when the oil cylinder works normally; when a certain amount of hydraulic oil accumulates in the non-working cavity and the pressure in the non-working cavity is larger than that in the working cavity, the one-way valve can be opened, and then the hydraulic oil in the non-working cavity can flow into the working cavity. The oil return device of the piston type oil cylinder does not need an oil return pipe, solves the problem of oil return of the non-working cavity of the oil cylinder well, and has the advantages of being simple in structure and convenient to install.
Description
Technical field
The utility model relates to a kind of oil return apparatus for ram cylinder, uses the return tube that this device can instead of piston formula oil cylinder.
Background technique
At present, in single ram cylinder, mostly all can on the inoperative chamber of oil cylinder, connect a return tube, with the hydraulic oil that will leak in the inoperative chamber, be discharged in fuel tank, but, in some uses, the mounting point of oil cylinder is more special, this root return tube on oil cylinder is difficult to arrange, so, if can save this root return tube, bring great convenience to the layout of oil cylinder.
Summary of the invention
Technical problem to be solved in the utility model is the oil return apparatus that a kind of ram cylinder simple in structure, easy for installation is provided for the above-mentioned state of the art.
The utility model solves the problems of the technologies described above adopted technological scheme: a kind of oil return apparatus of ram cylinder, the cylinder body that comprises oil cylinder, be provided with piston, piston rod in cylinder body, the end of piston rod is connected with piston seal, cylinder body is divided into active chamber and inoperative chamber by piston, it is characterized in that: the end of described piston rod is provided with one can enter the hydraulic oil in the inoperative chamber of cylinder body the one-way valve of active chamber.
As improvement, the end of described piston rod is provided with an installation slotted eye connection inoperative chamber, active chamber, that install for one-way valve, and described one-way valve is arranged on to be installed in slotted eye, by a hollow valve seat, with the installation slotted eye, is threaded fixing.
Improve again, described one-way valve comprises valve body, valve seat, spool and spring, valve body is the sleeve structure with the hollow that slotted eye is complementary is installed, be provided with shoulder hole in valve body, spool is spacing movably to be arranged in valve body, its front end stretches out valve body, rear end and spring offset, and under the effect of spring, have all the time forward by the trend of closed check valve, spring is against in valve seat, when the pressure in the inoperative chamber is greater than the pressure in active chamber, the active force that spool overcomes spring moves backward, by one-way valve opens.
Finally, the front end of described spring is nested with the rear end at spool, and the rear end of spring is plugged in the hollow recess of hollow valve seat, forms the interior threaded hole with hollow valve seat coupling in the installation slotted eye of piston rod.
Compared with prior art, the utility model has the advantage of: an one-way valve has been installed on the piston rod of oil cylinder the active chamber of oil cylinder is connected with the inoperative chamber, certain hydraulic oil accumulation is arranged in the inoperative chamber, when the pressure in the inoperative chamber is greater than the pressure in active chamber, one-way valve will be opened, and the hydraulic oil in the inoperative chamber will flow to active chamber.The utility model needn't install back oil pipe, preferably resolves the oil return problem in the inoperative chamber that solves oil cylinder, has advantages of simple in structure easy for installation.
The accompanying drawing explanation.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is fundamental diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in Figure 1 and Figure 2, the oil return apparatus of the ram cylinder of the present embodiment, the cylinder body 1 that comprises oil cylinder, be provided with piston 3, piston rod 2 in cylinder body 1, the end of piston rod 2 and piston 3 are tightly connected, cylinder body 1 is divided into active chamber 11 and inoperative chamber 12 by piston 3, and the end of piston rod 2 is provided with one can enter the hydraulic oil in the inoperative chamber 12 of cylinder body 1 one-way valve of active chamber 11; Active chamber 11 is communicated with the filler opening 8 on cylinder body 1.
One-way valve is to install like this: be provided with an installation slotted eye connection inoperative chamber, active chamber, that install for one-way valve in the end of piston rod 2, one-way valve is arranged on to be installed in slotted eye, install on the slotted eye inwall and form interior threaded hole, a hollow valve seat 7 is threaded to fix with the installation slotted eye one-way valve is fixed on and installs in slotted eye;
One-way valve comprises valve body 4, spool 5, hollow valve seat 7 and spring 6, valve body 4 is the sleeve structure with the hollow that slotted eye is complementary is installed, be provided with shoulder hole in valve body 4, spool 5 is spacing movably to be arranged in valve body 4, its front end stretches out valve body 1, rear end and spring 6 offset, the front end of spring 6 is nested with the rear end at spool 5, the rear end of spring 6 is plugged in the hollow recess of hollow valve seat 7, the through hole that connection is arranged in hollow recess, spool 5 has all the time forward by the trend of closed check valve under the effect of spring 6, certain hydraulic oil accumulation is arranged in the inoperative chamber, when the pressure in the inoperative chamber is greater than the pressure in active chamber, the active force that spool 4 overcomes spring 6 moves backward, fall into the hole enlargement hole at rear portion by one-way valve opens.
Working principle is such: the active chamber of oil cylinder connects with an one-way valve with the inoperative chamber, in the situation that the oil cylinder normal operation, this one-way valve is in closed condition; When certain hydraulic oil accumulation is arranged in the inoperative chamber, oil cylinder piston will form certain reinforcing when advancing in the inoperative chamber, when the pressure in the inoperative chamber is greater than the pressure in active chamber, one-way valve will be opened, and the hydraulic oil in the inoperative chamber will flow to active chamber and reach the effect of oil return.
Claims (4)
1. the oil return apparatus of a ram cylinder, the cylinder body that comprises oil cylinder, be provided with piston, piston rod in cylinder body, the end of piston rod is connected with piston seal, cylinder body is divided into active chamber and inoperative chamber by piston, it is characterized in that: the end of described piston rod is provided with one can enter the hydraulic oil in the inoperative chamber of cylinder body the one-way valve of active chamber.
2. oil return apparatus according to claim 1, it is characterized in that: the end of described piston rod is provided with an installation slotted eye connection inoperative chamber, active chamber, that install for one-way valve, described one-way valve is arranged on to be installed in slotted eye, by a hollow valve seat, with the installation slotted eye, is threaded fixing.
3. oil return apparatus according to claim 2, it is characterized in that: described one-way valve comprises valve body, valve seat, spool and spring, valve body is the sleeve structure with the hollow that slotted eye is complementary is installed, be provided with shoulder hole in valve body, spool is spacing movably to be arranged in valve body, its front end stretches out valve body, rear end and spring offset, and under the effect of spring, have all the time forward by the trend of closed check valve, spring is against in valve seat, when the pressure in the inoperative chamber is greater than the pressure in active chamber, the active force that spool overcomes spring moves backward, by one-way valve opens.
4. oil return apparatus according to claim 3, it is characterized in that: the front end of described spring is nested with the rear end at spool, the rear end of spring is plugged in the hollow recess of hollow valve seat, forms the interior threaded hole with hollow valve seat coupling in the installation slotted eye of piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320407520 CN203362691U (en) | 2013-07-10 | 2013-07-10 | Oil return device of piston type oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320407520 CN203362691U (en) | 2013-07-10 | 2013-07-10 | Oil return device of piston type oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203362691U true CN203362691U (en) | 2013-12-25 |
Family
ID=49810465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320407520 Expired - Lifetime CN203362691U (en) | 2013-07-10 | 2013-07-10 | Oil return device of piston type oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203362691U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443493A (en) * | 2015-12-23 | 2016-03-30 | 上海华岛液压设备制造有限公司 | Multi-stage hydraulic cylinder with automatic compensating device |
| CN110273875A (en) * | 2019-05-30 | 2019-09-24 | 武汉船用机械有限责任公司 | It is automatically replenished the one-way valve piston of fluid |
-
2013
- 2013-07-10 CN CN 201320407520 patent/CN203362691U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443493A (en) * | 2015-12-23 | 2016-03-30 | 上海华岛液压设备制造有限公司 | Multi-stage hydraulic cylinder with automatic compensating device |
| CN110273875A (en) * | 2019-05-30 | 2019-09-24 | 武汉船用机械有限责任公司 | It is automatically replenished the one-way valve piston of fluid |
| CN110273875B (en) * | 2019-05-30 | 2021-06-01 | 武汉船用机械有限责任公司 | One-way valve piston capable of automatically supplementing fluid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |
|
| CX01 | Expiry of patent term |