CN203500175U - Constant throttling buffering device of hydraulic cylinder - Google Patents
Constant throttling buffering device of hydraulic cylinder Download PDFInfo
- Publication number
- CN203500175U CN203500175U CN201320608879.9U CN201320608879U CN203500175U CN 203500175 U CN203500175 U CN 203500175U CN 201320608879 U CN201320608879 U CN 201320608879U CN 203500175 U CN203500175 U CN 203500175U
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- rear end
- face
- cushion collar
- hydraulic cylinder
- piston
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Abstract
A constant throttling buffering device of a hydraulic cylinder comprises a buffering sleeve installed at the front end of a piston of a piston rod, the outer diameter of the buffering sleeve is smaller than the outer diameter of the piston, the rear end surface of the buffering sleeve fits the front end surface of the piston, a conical surface is arranged at the inner edge of the rear end surface of the buffering sleeve, an end surface groove is formed in the rear end surface of the buffering sleeve, and an outer wall groove is formed in the outer wall of the piston rod. A concave part is formed in a rear end cover of the hydraulic cylinder, a sealing ring is installed on the buffering sleeve, an oil path is arranged on the rear end cover, and the oil path is communicated with a hydraulic system through an inlet/outlet oil path. A one-way valve is arranged at the part, located at the inner end surface of the rear end cover, of the oil path, the piston, the piston rod and the buffering device move jointly, the sealing ring on the buffering sleeve plays a role in sealing when moving to the concave part of the rear end cover, and oil inside a buffering cavity enters the outer wall groove of the piston rod through the end surface groove of the buffering sleeve and the inner hole conical surface of the buffering sleeve to play a role in throttling. Compared with the prior art, the constant throttling buffering device of the hydraulic cylinder has the advantages that the structure is simple, products are easy to machine, the one-time delivery-check qualified rate of the products is high, and unqualified products can be repaired.
Description
Technical field
The utility model is the permanent throttling buffering device of a kind of oil hydraulic cylinder, and specifically during a kind of hydraulic cylinder works, pressure oil liquid promotes piston rod to-and-fro motion, while preventing that piston rod movement from arriving bottom, speed, plays greater impact to connection device, the damping device of installing at tailpiece of the piston rod.
Background technique
At present, the permanent throttling buffering device of known oil hydraulic cylinder for having throttle orifice on rear end cover, rear end cover and cylinder body are welded structure, if completion of processing do experiment do not cushion or cushion not obvious, cannot repair, this structure is to early stage theoretical calculate and later stage machine adds and has relatively high expectations, if there are errors in computation or machine adds and do not reach requirement, all can cause and do not cushion or cushion not obvious.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of above-mentioned oil hydraulic cylinder throttling buffering device, and a kind of permanent throttling buffering device is provided, and this device can not only be realized permanent throttling buffering, and can repair when not obvious without throttling buffering or throttling buffering.
The technical solution of the utility model is: comprise the cushion collar that is loaded on piston rod piston nose; Cushion collar external diameter is less than piston external diameter.
Oil hydraulic cylinder rear end cover is provided with the recess for coordinating with cushion collar; Seal ring with rear end cover recess fitted seal is housed on cushion collar; Rear end cover is provided with the oil duct that is communicated with recess bottom surface and rear end cover interior edge face; Described oil duct is connected with hydraulic system through turnover oil duct.
After seal ring contacts with recess inner peripheral wall, the oil pocket that cushion collar outer wall and rear end cover interior edge face, hydraulic cylinder body inwall, piston nose face surround forms buffer cavity.
Oil duct be positioned at rear end cover interior edge face place be provided with prevent on cushion collar seal ring contact with recess inner peripheral wall after buffer cavity inner fluid through oil duct, flow back to the one-way valve of hydraulic system.
Cushion collar ear end face and the laminating of piston nose face; In cushion collar ear end face, edge is provided with for the conical surface with piston nose face, piston rod outer peripheral surface formation ring-type fluid passage; Cushion collar ear end face is provided with piston nose face and coordinates and form end face fluid passage to be communicated with the end face groove of ring-type fluid passage and buffer cavity; Described piston rod outer wall is provided with cushion collar inwall and coordinates and form outer wall fluid passage to be communicated with the unit with grooves in outer wall of ring-type fluid passage and rear end cover interior edge face oil duct.
Described end face groove is one or more.
Described unit with grooves in outer wall is one or more.
Described unit with grooves in outer wall is V-shaped groove.
The described conical surface is the circumference conical surface.
Described seal ring is O RunddichtringO.
Described rear end cover recess inwall and cushion collar outer wall are transition fit.
The degree of finish of described cushion collar outer wall and rear end cover recess inwall is Ra1.6.
Compared with prior art, the utlity model has simple in structurely, product is easily processed, and delivery-check qualified rate of product is high, defective recoverable feature.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.(piston rod movement is to SOT state of termination)
Fig. 2 is structural representation of the present utility model.(on damping device seal ring enter rear end cover seal)
Fig. 3 is structural representation of the present utility model.(damping device does not enter rear end cover state)
Fig. 4 is the structural representation of cushion collar.
Fig. 5 is that the A of Fig. 4 is to view.
Fig. 6 is piston rod 2 partial structurtes schematic diagram.
Fig. 7 is the A-A cut-away view of Fig. 6.
Fig. 8 is the partial enlarged drawing of Fig. 3.
In figure, 1, cushion collar, 2, piston rod, 3, rear end cover, 4, end face groove, 5, seal ring, 6, unit with grooves in outer wall, 7, piston, 8, recess, 9, buffer cavity, 10, one-way valve, 11, cylinder body, 12, turnover oil duct, 13, oil duct, 14, the conical surface, 15, oil duct, 16, guide sleeve, 17, ring-type fluid passage.
Embodiment
In Fig. 1, it is upper that piston 7 is arranged on piston rod 2 multidiameter shafts (2-1), and cushion collar 1 is loaded on the piston rod 2 of piston 7 front ends.Cushion collar 1 is threaded connection with piston rod 2.Oil hydraulic cylinder rear end cover 3 is provided with the recess 8 for coordinating with cushion collar 1 outer wall; Seal ring 5 with rear end cover 3 recess 8 fitted seal is housed on cushion collar 1 outer wall; Rear end cover 3 is provided with the oil duct 13 that is communicated with recess 8 bottom surfaces and rear end cover 3 interior edge faces; Described oil duct 13 is connected with hydraulic system through turnover oil duct 12.After seal ring 5 contacts with recess 8 inner peripheral walls, the oil pocket that cushion collar 1 outer wall and rear end cover 3 ear end faces, hydraulic cylinder body 11 inwalls, piston 7 front-end faces surround forms buffer cavity 9.Oil duct 13 be positioned at rear end cover 3 interior edge face places be provided with prevent on cushion collar 1 seal ring 5 contact with recess 8 inner peripheral walls after buffer cavity 9 inner fluids through oil duct 13, flow back to the one-way valve 10 of hydraulic system.Piston 7 front-end faces (7-2) and cushion collar 1 ear end face (1-1) laminating.In cushion collar 1 ear end face, edge is provided with for the conical surface 14 with piston 7 front-end faces, piston rod 2 outer peripheral surfaces formation ring-type fluid passages 17; Cushion collar 1 ear end face is provided with piston 7 front-end faces and coordinates and form end face fluid passage to be communicated with the end face groove 4 of ring-type fluid passage 17 and buffer cavity 9; Described piston rod 2 outer walls are provided with cushion collar 1 inwall and coordinate and form outer wall fluid passage to be communicated with the unit with grooves in outer wall 6 of ring-type fluid passage 17 and rear end cover 3 oil ducts 13.One-way valve 10 cylindricals have screw thread, and there is screw thread at oil duct 15 places in rear end cover 3 oil ducts 13, and one-way valve 10 is threaded with oil duct 15.Rear end cover 3 is welded and fixed with cylinder body 11.Cylinder body 11 is connected with guide sleeve 16 bolts.The gap of cushion collar 1 outer wall and rear end cover 3 recess 8 inwalls is transition fit H8/m7.
In Fig. 2, when external pressure fluid promotes piston 7, cushion collar 1 and piston rod 2 associated movements by guide sleeve 16 oil ducts (16-1), when on cushion collar 1, seal ring 5 enters rear end cover 3 recess 8, seal, one-way valve 10 is closed, fluid by buffer cavity 9 enter cushion collar 1 ear end face groove 4, ring-type fluid passage 17, piston rod 2 unit with grooves in outer walls 6, rear end cover 3 oil ducts 13, turnover oil duct 12 is got back to hydraulic system, can reach the effect of throttling buffering, if cushioning effect is undesirable, can repair separately part, reach buffering requirement.
In Fig. 3, when external pressure fluid is by rear end cover 3 turnover oil ducts 12, oil duct 15, pushes one-way valve 10 open, and fluid promotes piston 7, cushion collar 1 and piston rod 2 associated movements, and cushion collar 1 leaves rear end cover 3 recesses 8.
When external pressure fluid promotes piston 7, cushion collar 1 and piston rod 2 associated movements by guide sleeve 16 oil ducts (16-1), when on cushion collar 1, seal ring 5 does not enter rear end cover 3 recess 8, fluid by rear end cover 3 recesses 8 successively enter oil duct 13, turnover oil duct 12 is got back to hydraulic system.
In Fig. 4, damping device comprises cushion collar 1 and is arranged on the seal ring 5 on cushion collar 1, and seal ring 5 is arranged on the circular groove of cushion collar 1.The conical surface 14 leaves at cushion collar 1 endoporus, and end face groove 4 is opened on the end face of cushion collar 1, and the fluid in buffer cavity 9 flows into the cushion collar 1 endoporus conical surface 14 from end face groove 4.In figure, R=1, a=1, d=4 ~ 5, e=20o.
In Fig. 5, end face groove 4 is opened on the end face of cushion collar 1, and the fluid in buffer cavity 9 flows into the cushion collar 1 endoporus conical surface 14 from end face groove 4.
In Fig. 6, Fig. 7, in piston rod 2 end thread, have unit with grooves in outer wall 6, the fluid in buffer cavity flows into the cushion collar 1 endoporus conical surface, unit with grooves in outer wall 6 by end face groove.In figure, b=2, c=1.
In Fig. 8, cushion collar 1 ear end face and piston rod 2 outer walls, cushion collar 1 conical surface 14 form ring-type fluid passage 17.
Claims (8)
1. the permanent throttling buffering device of oil hydraulic cylinder, is characterized in that: comprise the cushion collar (1) that is loaded on piston rod (2) piston (7) front end; Cushion collar (1) external diameter is less than piston (7) external diameter;
Oil hydraulic cylinder rear end cover (3) is provided with the recess (8) for coordinating with cushion collar (1); Seal ring (5) with rear end cover (3) recess (8) fitted seal is housed on cushion collar (1); Rear end cover (3) is provided with the oil duct (13) that is communicated with recess (8) bottom surface and rear end cover (3) interior edge face; Described oil duct (13) is connected with hydraulic system through turnover oil duct (12);
After seal ring (5) contacts with recess (8) inner peripheral wall, the oil pocket that cushion collar (1) outer wall and rear end cover (3) ear end face, hydraulic cylinder body inwall, piston (7) front-end face surround forms buffer cavity (9);
Oil duct (13) is positioned at rear end cover (3) interior edge face place and is provided with and prevents that the upper seal ring (5) of cushion collar (1) from contacting buffer cavity (9) inner fluid afterwards and through oil duct (13), flowing back to the one-way valve (10) of hydraulic system with recess (8) inner peripheral wall;
Cushion collar (1) ear end face and the laminating of piston (7) front-end face; In cushion collar (1) ear end face, edge is provided with for the conical surface (14) with piston (7) front-end face, piston rod (2) outer peripheral surface formation ring-type fluid passage (17); Cushion collar (1) ear end face is provided with piston (7) front-end face and coordinates and form end face fluid passage to be communicated with the end face groove (4) of ring-type fluid passage (17) and buffer cavity (9); Described piston rod (2) outer wall is provided with cushion collar (1) inwall and coordinates and form outer wall fluid passage to be communicated with the unit with grooves in outer wall (6) of ring-type fluid passage (17) and rear end cover (3) interior edge face oil duct (13).
2. the permanent throttling buffering device of oil hydraulic cylinder according to claim 1, is characterized in that: described end face groove (4) is one or more.
3. the permanent throttling buffering device of oil hydraulic cylinder according to claim 1, is characterized in that: described unit with grooves in outer wall (6) is one or more.
4. according to the permanent throttling buffering device of the oil hydraulic cylinder described in claim 1 or 3, it is characterized in that: described unit with grooves in outer wall (6) is V-shaped groove.
5. the permanent throttling buffering device of oil hydraulic cylinder according to claim 1, is characterized in that: the described conical surface (14) is the circumference conical surface.
6. the permanent throttling buffering device of oil hydraulic cylinder according to claim 1, is characterized in that: described seal ring (5) is O RunddichtringO.
7. the permanent throttling buffering device of oil hydraulic cylinder according to claim 1, is characterized in that: described rear end cover (3) recess (8) inwall and cushion collar (1) outer wall are transition fit.
8. the permanent throttling buffering device of oil hydraulic cylinder according to claim 1, is characterized in that: the degree of finish of described cushion collar (1) outer wall and rear end cover (3) recess (8) inwall is Ra1.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320608879.9U CN203500175U (en) | 2013-09-30 | 2013-09-30 | Constant throttling buffering device of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320608879.9U CN203500175U (en) | 2013-09-30 | 2013-09-30 | Constant throttling buffering device of hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203500175U true CN203500175U (en) | 2014-03-26 |
Family
ID=50331157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320608879.9U Withdrawn - After Issue CN203500175U (en) | 2013-09-30 | 2013-09-30 | Constant throttling buffering device of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203500175U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939420A (en) * | 2013-09-30 | 2014-07-23 | 湖北江山液压科技有限公司 | Hydraulic cylinder constant throttling buffering device |
| CN108367418A (en) * | 2015-12-02 | 2018-08-03 | 蒙塔博特公司 | Rock breaking device |
| CN110159610A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The plug and hydraulic device working cylinder of hydraulic device working cylinder |
| US10738802B2 (en) | 2016-06-16 | 2020-08-11 | Qingdao Acme Innovation Technology Co., Ltd. | Hydraulic buffer and cylinder combined with the same |
| US10962221B2 (en) | 2018-11-13 | 2021-03-30 | Pro-Iroda Industries, Inc. | Flame gun with flow control ring |
-
2013
- 2013-09-30 CN CN201320608879.9U patent/CN203500175U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939420A (en) * | 2013-09-30 | 2014-07-23 | 湖北江山液压科技有限公司 | Hydraulic cylinder constant throttling buffering device |
| CN103939420B (en) * | 2013-09-30 | 2016-07-13 | 湖北江山液压科技有限公司 | A kind of hydraulic cylinder perseverance throttling buffering device |
| CN108367418A (en) * | 2015-12-02 | 2018-08-03 | 蒙塔博特公司 | Rock breaking device |
| CN108367418B (en) * | 2015-12-02 | 2021-01-08 | 蒙塔博特公司 | Rock breaking apparatus |
| US10738802B2 (en) | 2016-06-16 | 2020-08-11 | Qingdao Acme Innovation Technology Co., Ltd. | Hydraulic buffer and cylinder combined with the same |
| US10962221B2 (en) | 2018-11-13 | 2021-03-30 | Pro-Iroda Industries, Inc. | Flame gun with flow control ring |
| CN110159610A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The plug and hydraulic device working cylinder of hydraulic device working cylinder |
| CN110159610B (en) * | 2019-04-26 | 2020-11-06 | 平高集团有限公司 | Plug of hydraulic device working cylinder and hydraulic device working cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140326 Effective date of abandoning: 20160713 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140326 Effective date of abandoning: 20160713 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |