CN202326517U - Pressure-relieving-type buffer hydraulic cylinder - Google Patents
Pressure-relieving-type buffer hydraulic cylinder Download PDFInfo
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- CN202326517U CN202326517U CN2011203399640U CN201120339964U CN202326517U CN 202326517 U CN202326517 U CN 202326517U CN 2011203399640 U CN2011203399640 U CN 2011203399640U CN 201120339964 U CN201120339964 U CN 201120339964U CN 202326517 U CN202326517 U CN 202326517U
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Abstract
The utility model provides a pressure-relieving-type buffer hydraulic cylinder comprising a cylinder body, a piston, an end cover, two oil ports and two limited-pressure-type one-way valve the breakover direction of which is from the interior of the cylinder body to the exterior of the cylinder body. The end cover seals the opening of the cylinder body, the piston is arranged in the cylinder body and a piston rod of the piston penetrates through the end cover. Seal rings are arranged in the end cover and on the piston. A first limited-pressure-type one-way valve of the two limited-pressure-type one-way valves is arranged on the cylinder wall near the bottom of the cylinder and a second limited-pressure-type one-way valve is arranged on the cylinder wall near the end cover. One of the oil ports is arranged between the first limited-pressure-type one-way valve and the bottom of the cylinder and the other oil port is arranged between the second limited-pressure-type one-way valve and the end cover. The pressure-relieving-type buffer hydraulic cylinder can be used for effectively reducing the pressure of the hydraulic cylinder during buffering, and the rigid shock between the piston and the cylinder body is less, thus the pressure-relieving-type buffer hydraulic cylinder has less possibility of being damaged.
Description
Affiliated technical field
The utility model relates to the hydraulic machinery apparatus field, especially, is a kind of buffering hydraulic cylinder.
Background technique
Buffering hydraulic cylinder is the oil hydraulic cylinder with pooling feature, is a kind of disclosed cylinder cushion device that places the oil hydraulic cylinder of excavator, and this cylinder cushion device is made up of the flange of piston and the recessed edge of cylinder body, the impact that absorbing impact produced when both contacted.Owing to this damping device is set,, also the situation that pressure is higher than the design strength of oil hydraulic cylinder can take place even bigger external force is applied on the oil hydraulic cylinder.
Yet present buffering hydraulic cylinder is owing to adopt the method for extruding type to reduce impact force, and the pressure ratio of oil hydraulic cylinder is bigger, and the time has been grown and has been prone to break down.
Summary of the invention
To the problems referred to above, the purpose of the utility model is to provide a kind of pressure-relief type buffering hydraulic cylinder, and this pressure-relief type buffering hydraulic cylinder can effectively reduce the pressure of when buffering oil hydraulic cylinder, and piston is less, not fragile with the rigidity of cylinder impact.
The scheme that the utility model technical solution problem is adopted is: comprise that cylinder body, piston, end cap, two hydraulic fluid ports and two conducting directions are from cylinder interior to its outside limited pressure one-way valve; Said end cap is sealed the cylinder mouth of cylinder body, and said piston is in cylinder body, and its piston rod passes end cap; In the said end cap and piston be provided with seal ring; The first limited pressure one-way valve in said two limited pressure one-way valves is arranged on the casing wall of nearly cylinder bottom; The second limited pressure one-way valve is arranged on the casing wall of proximal cover; In said two hydraulic fluid ports; A hydraulic fluid port is arranged between the first limited pressure one-way valve and the cylinder bottom, and another hydraulic fluid port is arranged between the second limited pressure one-way valve and the end cap.
As preferably, described two hydraulic fluid ports are opened in respectively on cylinder bottom and the end cap; And the distance between the said first limited pressure one-way valve and the second limited pressure one-way valve and the pairing said hydraulic fluid port of they difference is greater than the thickness of piston.
As preferably, said two limited pressure one-way valves are communicated with their pairing said hydraulic fluid ports respectively.
As preferably, has pressure regulating mechanism on two said limited pressure one-way valves.
The beneficial effect of the utility model is: when work; Hydraulic drive piston moves reciprocatingly, and when piston soon arrived cylinder body one end, piston slipped over the limited pressure one-way valve; The on high-tension side hydraulic oil of piston passes through the limited pressure one-way valve by pressure release; Thereby the pressure of piston both sides is tended to balance, and piston drops on cylinder body one end slowly, has reduced the rigid impulse between piston and the cylinder ends.
Description of drawings
Fig. 1 is an embodiment's of this pressure-relief type buffering hydraulic cylinder a structural representation.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified:
In the embodiment shown in fig. 1, this pressure-relief type buffering hydraulic cylinder comprise cylinder body 1, piston 3, end cap 2, two hydraulic fluid ports 11 and two conducting directions for from cylinder body 1 inside to its outside limited pressure one- way valve 12a, 12b; Said end cap 2 is sealed the cylinder mouth of cylinder body 1, and said piston 3 is in cylinder body 1, and its piston rod passes end cap 2; In the said end cap 2 and piston 3 be provided with seal ring 31; The first limited pressure one-way valve 12a in said two limited pressure one-way valves is arranged on the casing wall of nearly cylinder bottom; The second limited pressure one-way valve 12b is arranged on the casing wall of proximal cover 2; In said two hydraulic fluid ports 11; A hydraulic fluid port is arranged between the first limited pressure one-way valve 12a and the cylinder bottom (comprising cylinder bottom), and another hydraulic fluid port is arranged between the second limited pressure one-way valve 12a and the end cap 2 and (comprises end cap 2); In order to increase the effective travel in the cylinder body 1, described two hydraulic fluid ports are opened in respectively on cylinder bottom and the end cap 2; And; Distance between the said first limited pressure one-way valve 12a and the second limited pressure one-way valve 12b and the pairing said hydraulic fluid port 11 of they difference is greater than the thickness of piston; So, in the time of can making two hydraulic fluid port 11 places of piston arrives, can slip over said two limited pressure one- way valve 12a, 12b fully.
In order to recycle the hydraulic oil that flows out in said two limited pressure one-way valve 12a, the 12b, these two limited pressure one- way valve 12a, 12b are communicated with their pairing said hydraulic fluid ports 11 respectively.
In order to regulate restriction pressure, two said limited pressure one- way valve 12a, 12b be last to have pressure regulating mechanism.
Above-mentioned pressure-relief type buffering hydraulic cylinder is when work; Hydraulic drive piston 3 moves reciprocatingly, and when piston 3 soon arrived cylinder body 1 one ends, piston 3 slipped over limited pressure one- way valve 12a, 12b; Piston 3 on high-tension side hydraulic oil pass through the limited pressure one-way valve by pressure release; Thereby the pressure of piston both sides is tended to balance, and piston 3 drops on cylinder body one end slowly, has reduced the rigid impulse between piston 3 and cylinder body 1 end.
The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (4)
1. a pressure-relief type buffering hydraulic cylinder comprises cylinder body (1), piston (3), end cap (2), two hydraulic fluid ports (11); Said end cap (2) is sealed the cylinder mouth of cylinder body (1), and said piston (3) is in cylinder body (1), and its piston rod passes end cap (2); In the said end cap (2) and piston (3) be provided with seal ring (31), it is characterized in that: this pressure-relief type buffering hydraulic cylinder comprises that also two conducting directions are for inner to its outside limited pressure one-way valve (12a, 12b) from cylinder body (1); The first limited pressure one-way valve (12a) in said two limited pressure one-way valves is arranged on the casing wall of nearly cylinder bottom; The second limited pressure one-way valve (12b) is arranged on the casing wall of proximal cover (2); In said two hydraulic fluid ports (11); A hydraulic fluid port is arranged between the first limited pressure one-way valve (12a) and the cylinder bottom, and another hydraulic fluid port is arranged between the second limited pressure one-way valve (12a) and the end cap (2).
2. pressure-relief type buffering hydraulic cylinder according to claim 1 is characterized in that: described two hydraulic fluid ports (11) are opened in respectively on cylinder bottom and the end cap (2); And the distance between the said first limited pressure one-way valve (12a) and the second limited pressure one-way valve (12b) and their the pairing said hydraulic fluid ports of difference (11) is greater than the thickness of piston (3).
3. according to claim 1 or the described pressure-relief type buffering hydraulic cylinder of claim 2, it is characterized in that: these two limited pressure one-way valves (12a, 12b) are communicated with their pairing said hydraulic fluid ports (11) respectively.
4. pressure-relief type buffering hydraulic cylinder according to claim 1 is characterized in that: have pressure regulating mechanism on two said limited pressure one-way valves (12a, 12b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203399640U CN202326517U (en) | 2011-09-08 | 2011-09-08 | Pressure-relieving-type buffer hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203399640U CN202326517U (en) | 2011-09-08 | 2011-09-08 | Pressure-relieving-type buffer hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202326517U true CN202326517U (en) | 2012-07-11 |
Family
ID=46438498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203399640U Expired - Fee Related CN202326517U (en) | 2011-09-08 | 2011-09-08 | Pressure-relieving-type buffer hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202326517U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216486A (en) * | 2013-04-18 | 2013-07-24 | 湖南华菱湘潭钢铁有限公司 | Hydraulic cylinder |
| CN116696889A (en) * | 2023-08-02 | 2023-09-05 | 三和油缸(常州)有限公司 | Pressure self-releasing type extrusion oil cylinder |
-
2011
- 2011-09-08 CN CN2011203399640U patent/CN202326517U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216486A (en) * | 2013-04-18 | 2013-07-24 | 湖南华菱湘潭钢铁有限公司 | Hydraulic cylinder |
| CN116696889A (en) * | 2023-08-02 | 2023-09-05 | 三和油缸(常州)有限公司 | Pressure self-releasing type extrusion oil cylinder |
| CN116696889B (en) * | 2023-08-02 | 2023-10-13 | 三和油缸(常州)有限公司 | Pressure self-releasing type extrusion oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20130908 |