CN202926756U - Radial equilibrium-type hydraulic cylinder buffering device - Google Patents
Radial equilibrium-type hydraulic cylinder buffering device Download PDFInfo
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- CN202926756U CN202926756U CN 201220586101 CN201220586101U CN202926756U CN 202926756 U CN202926756 U CN 202926756U CN 201220586101 CN201220586101 CN 201220586101 CN 201220586101 U CN201220586101 U CN 201220586101U CN 202926756 U CN202926756 U CN 202926756U
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Abstract
A radial equilibrium-type hydraulic cylinder buffering device comprises a cylinder, a piston and a cylinder cover, wherein a main oil passage is arranged on the outer circumferential surface of the front end of the cylinder; a high-pressure oil-discharging passage is arranged on the cylinder cover; a pressure-limiting valve core is arranged inside the high-pressure oil-discharging passage; two throttling grooves which have communicated end surfaces and variable sections are symmetrically formed at the front end of an outer cylindrical surface of the piston; the sections gradually increase from the back end to the front end; the piston is installed inside the cylinder in the way that one of the throttling grooves can be communicated with the main oil passage; an annular groove for connecting the back ends of the two throttling grooves is formed on the outer cylindrical surface of the piston; when the piston brakes, a flowing section thereof gradually diminishes, resistance gradually increases, a buffering force is uniform, and a hydraulic radial force stressed on the piston is always in an equilibrium state, so that abrasion of both the piston and the cylinder can be avoided; the high-pressure oil-discharging passage is arranged on the cylinder cover and the pressure-limiting valve core is arranged inside the high-pressure oil-discharging passage, so that damage to a hydraulic cylinder, caused by extremely high pressure of hydraulic oil, can be prevented; and the radial equilibrium-type hydraulic cylinder buffering device is simple in structure and easy to manufacture and can obviously prolong the service life of the hydraulic cylinder.
Description
Technical field
The utility model relates to a kind of radial equilibrium formula 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.The structure of damping device is multiple, example China Patent No. CN201120118264.9 is disclosed is the cylinder cushion device that boss on a kind of its piston and the cavity on cylinder cap adopt the cone match form, when piston coordinates with cylinder cap, passage section diminishes gradually, improve buffer function, and cylinder cap is provided with high pressure draining passage, can prevent from that hydraulic fluid pressure is too high oil hydraulic cylinder is caused damage.The damping device that also has at present a kind of structure, piston is annulus, the side of cylinder body is provided with oil outlet, throttling groove that connects end face of processing on the outer cylinder of piston, when piston is installed, the corresponding oil outlet of throttling groove, namely the throttling groove can with cylinder body on oil outlet link up, cylinder cap is provided with high pressure draining passage.Because the throttling groove is one-sided, so the radial force that is subject on piston is unbalanced, so that piston and inboard wall of cylinder block generation eccentric wear phenomenon, make piston and cylinder body impaired, shorten the working life of oil hydraulic cylinder.
The model utility content
The purpose of this utility model is to propose a kind ofly can prevent piston and the impaired radial equilibrium formula cylinder cushion device of cylinder body.
For achieving the above object, the utility model is taked following technological scheme:
The utlity model has cylinder body, piston and cylinder cap, the outer circumferential face of cylinder body front end is provided with main oil gallery, cylinder cap is provided with high pressure draining passage, be provided with the pressure limiting spool in high pressure draining passage, it is characterized in that: the outer cylinder front end of piston is arranged with two throttling grooves that connect the variable cross section of end face, changes of section is to increase gradually from the rear end to the front end, the orientation that piston is linked up with one of them throttling groove energy and main oil gallery is arranged in cylinder body, and the outer cylinder of piston is provided with the circular groove that the rear end of two throttling grooves is connected.
Described pressure limiting spool comprises hollow bolt, sealing ball and spring.
The utility model is because the outer cylinder front end at piston is symmetrical arranged two throttling grooves, and the cylinder of piston is provided with the circular groove that the rear end of two throttling grooves is connected, when piston deceleration, its passage section reduces gradually, drag effect increases gradually, buffering evenly, and the hydraulic radial power suffered by piston always keeps state of equilibrium, can not cause the wearing and tearing of piston and cylinder body, and cylinder cap is provided with high pressure draining passage, in be provided with the pressure limiting spool, can prevent from that hydraulic fluid pressure is too high oil hydraulic cylinder is caused damage.This apparatus structure is simple, is easy to processing, can significantly improve hydraulic cylinder life.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the end view of piston.
Fig. 3 is the side view of Fig. 2.
Fig. 4 is the plan view of Fig. 2.
Embodiment
See Fig. 1 to Fig. 4, this cylinder cushion device has cylinder body 1, piston 2 and cylinder cap 3, and the side front end of cylinder body 1 is provided with main oil gallery 1-1, and cylinder cap 3 is provided with the high pressure draining passage 3-1 that the chamber with cylinder body 1 communicates, and is provided with pressure limiting spool 4 in high pressure draining passage 3-1.Described pressure limiting spool 4 comprises hollow bolt 4-1, ball sealer 4-2 and spring 4-3, and spring pressure is regulated by hollow bolt 4-1.
The outer cylinder front end of piston 2 is arranged with two throttling groove 2-1 that connect the variable cross section of end face, and the cross section of throttling groove 2-1 is dihedral, and changes of section is to increase gradually from the rear end to the front end.Piston 2 is arranged in cylinder body 1 with the orientation that one of them throttling groove 2-1 energy and main oil gallery 1-1 link up, and piston 2 is fixedly connected with by nut 6 with piston rod 5, and cylinder cap 3 interior edge faces are provided with groove 3-2, enter for nut 6.
When piston deceleration, hydraulic oil is discharged from main oil gallery 1-1, and its passage section reduces gradually, and drag effect increases gradually, and piston 2 Speed Reduction that travels forward plays buffer function.Due to the setting of throttling groove 2-1, cushion effect is evenly increased.Greater than above-mentioned spring pressure, hydraulic oil is pushed ball sealer open by the passage of hollow bolt 4-1 when the pressure of cylinder body 1 front end, and 3-1 releases by high pressure draining passage.
Claims (2)
1. radial equilibrium formula cylinder cushion device, has cylinder body (1), piston (2) and cylinder cap (3), the outer circumferential face of cylinder body (1) front end is provided with main oil gallery (1-1), cylinder cap (3) is provided with high pressure draining passage (3-1), be provided with pressure limiting spool (4) in high pressure draining passage (3-1), it is characterized in that: the outer cylinder front end of piston (2) is arranged with two throttling grooves (2-1) that connect the variable cross section of end face, changes of section is to increase gradually from the rear end to the front end, the orientation that piston (2) is linked up with one of them throttling groove (2-1) energy and main oil gallery (1-1) is arranged in cylinder body (1), the outer cylinder of piston (2) is provided with the circular groove (2-2) that the rear end of two throttling grooves (2-1) is connected.
2. radial equilibrium formula cylinder cushion device according to claim 1, it is characterized in that: described pressure limiting spool (4) comprises hollow bolt (4-1), ball sealer (4-2) and spring (4-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220586101 CN202926756U (en) | 2012-11-08 | 2012-11-08 | Radial equilibrium-type hydraulic cylinder buffering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220586101 CN202926756U (en) | 2012-11-08 | 2012-11-08 | Radial equilibrium-type hydraulic cylinder buffering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202926756U true CN202926756U (en) | 2013-05-08 |
Family
ID=48216720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220586101 Expired - Fee Related CN202926756U (en) | 2012-11-08 | 2012-11-08 | Radial equilibrium-type hydraulic cylinder buffering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202926756U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629189A (en) * | 2013-12-13 | 2014-03-12 | 蚌埠液力机械有限公司 | Double-acting oil cylinder with an adjustable buffering effect |
| CN106224325A (en) * | 2016-08-25 | 2016-12-14 | 北汽福田汽车股份有限公司 | Plunger case, pumping system pendulum valve system and concrete pumping equipment |
| 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 |
-
2012
- 2012-11-08 CN CN 201220586101 patent/CN202926756U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629189A (en) * | 2013-12-13 | 2014-03-12 | 蚌埠液力机械有限公司 | Double-acting oil cylinder with an adjustable buffering effect |
| 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 |
| CN106224325A (en) * | 2016-08-25 | 2016-12-14 | 北汽福田汽车股份有限公司 | Plunger case, pumping system pendulum valve system and concrete pumping equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20151108 |
|
| EXPY | Termination of patent right or utility model |