CN202718967U - Double buffering self-adjustment positioning hydraulic oil cylinder - Google Patents
Double buffering self-adjustment positioning hydraulic oil cylinder Download PDFInfo
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- CN202718967U CN202718967U CN 201220403657 CN201220403657U CN202718967U CN 202718967 U CN202718967 U CN 202718967U CN 201220403657 CN201220403657 CN 201220403657 CN 201220403657 U CN201220403657 U CN 201220403657U CN 202718967 U CN202718967 U CN 202718967U
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- buffering
- piston rod
- cylinder
- piston
- cushion
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Abstract
The utility model relates to a double buffering self-adjustment positioning hydraulic oil cylinder. The double buffering self-adjustment positioning hydraulic oil cylinder comprises a cylinder cover, a piston rod assembly, a cylinder assembly, a buffering sleeve, a piston, a lock nut and a buffering pin, wherein the buffering sleeve is installed on the inner side of a connection portion of a piston rod and the piston in sleeved and connected mode, the buffering sleeve is matched with a buffering cavity of the inner wall of a cylinder cover hole in inserted mode, and the buffering pin is installed on the front end face of the piston rod and is in clearance fit with a buffering hole of the cylinder bottom. The double buffering self-adjustment positioning hydraulic oil cylinder is characterized in that the buffering sleeve is respectively in inner clearance fit and in outer clearance fit with buffering cavities inside the piston rod and the cylinder cover hole, the length of the buffering sleeve is smaller that of the buffering cavity of the cylinder cover, and the buffering pin is axially connected with the front end face of the piston rod in clamped mode through an elastic collar. The double buffering self-adjustment positioning hydraulic oil cylinder enables the buffering sleeve and the buffering pin to achieve free floating centering under the action of hydraulic oil. Particularly, the buffering pin is axially connected with the front end face of the piston rod in clamped mode through the elastic collar, so that when coaxiality of the piston rod and a cylinder is deviated, positions are changed appropriately to avoid squeezed damage, service life of the oil cylinder is prolonged, and buffering effect is ensured.
Description
Technical field
The utility model relates to the hydraulic machinery technical field, and specifically hydraulic jack is located in a kind of double buffering self-regulation.
Background technique
Hydraulic jack is the driver part that extensively adopts in the hydraulic machinery, mainly formed by cylinder cap, piston-rod assembly, cylinder barrel assembly, piston, piston ring, locking nut and back-up ring, seal ring, guide sleeve, pressure duct etc., pass through the to-and-fro motion between the cylinder bottom of cylinder cap and cylinder barrel assembly of hydraulic oil driven plunger during work, direct collision will occur in piston and cylinder cap and cylinder bottom in movement process, causes the damage of piston, cylinder cap and cylinder bottom surface of contact.A kind of pressure-reducing cushioning oil cylinder (patent No. is 201020114293) is disclosed such as Chinese patent, it comprises gray iron, piston, piston rod and hydraulic oil pipe, cylinder cap is located at an end of cylinder body, piston is fixedly mounted on the piston rod by piston unt, wherein, establish buffer cavity in the cylinder cap, piston rod is provided with the corresponding cushion collar of buffer cavity in size, shape and the cylinder cap; The top of piston rod is provided with cushion pins, and cushion pins cooperates with the buffering of cylinder bottom is empty.During work, when piston stroking upward ran to head side, the cushion collar on the piston rod cooperated with buffer cavity on the cylinder cap, has played buffer function; When descent of piston ran to the cylinder bottom end, the cushion pins on the piston rod cooperated with cushion hole on the cylinder bottom, has played buffer function; Alleviate the wearing and tearing of piston, cylinder cap, cylinder bottom with this.But because the cushion collar and the cushion pins itself that use in this technology adopt rigid connection in structural design, its buffer function is mainly derived from the variation of liquid stream, so the effect of its buffering is still waiting further raising.Its sealing intensity also has much room for improvement in addition.
The model utility content
The purpose of this utility model is exactly the defective that exists for prior art, and the double buffering self-regulation location that a kind of shock-absorbing capacity is good, sealing intensity is high hydraulic jack is provided.
Its technological scheme is: comprise cylinder cap, piston-rod assembly, the cylinder barrel assembly, cushion collar, piston, locking nut and cushion pins, wherein the cushion collar connecting sleeve is contained in the inboard of piston rod and piston connection part, and peg graft with the buffer cavity of cylinder head bore inwall and to cooperate, cushion pins be located at the piston rod front-end face and with the cushion hole Spielpassung of cylinder bottom, it is characterized in that: cushion collar respectively with piston rod, in buffer cavity in the cylinder head bore forms, external series gap cooperates, the length of cushion collar is less than the length of cylinder cap buffer cavity, and described cushion pins is connected to the piston rod front-end face vertically by circlip.
Described cushion collar and piston butt end are provided with guide ring, and the other end is the working surface of cone shape, is provided with knuckle in the exterior edge face of working surface, are provided with 3-6 buffering inclined-plane at the outer surface axially spaced-apart of cone.The buffering inclined-plane swells rear consistent with the cushion collar maximum outside diameter along the working surface of cone shape gradually.
Three grades of seal rings are adopted in connecting part at cylinder cap and piston rod, and primary seal is U-shaped sealing structure circle in the middle of it, is provided with the throttle bore supporting with throttle valve in cylinder bottom cushion hole one side, radially is provided with lock screw at locking nut and piston rod connecting part.Lock screw exterior edge face and locking nut are by elasticity baffle ring lock fit.
The utility model has changed work structuring relation, the matching relationship of existing cushion collar and cushion pins, cushion collar and cushion pins can be felt relieved by free floating under the effect of hydraulic oil, particularly cushion pins is connected to the piston rod front-end face vertically by circlip, when piston rod and cylinder barrel coaxality have deviation, suitable change position is avoided being extruded impaired, prolong the working life of oil cylinder, guaranteed cushioning effect.Simultaneously, lock screw exterior edge face and locking nut are guaranteed closely cooperating lastingly of piston and piston rod by elasticity baffle ring lock fit, have also adopted the mode of the U-shaped sealing of cascaded coordination on sealing technique, have greatly improved its sealing intensity.
Description of drawings
Fig. 1 is a kind of embodiment's of the utility model structural drawing;
Fig. 2 is the amplification assumption diagram of cushion collar among Fig. 1.
Among the figure: 1 piston-rod assembly, 2. cylinder cap, 3. cylinder barrel assembly, 4. cushion collar, 5. piston, 6. locking nut, 7. lock screw, 8. circlip, 9. cushion pins, 10. throttle valve, 11. knuckles, 12. buffering inclined-planes, 13. guide rings, 14. guiding gutters.
Embodiment
Embodiment: a kind of double buffering self-regulation location hydraulic jack, with reference to Fig. 1, the body of rod of piston-rod assembly 1 stretches in the cylinder barrel 3 by cylinder cap 2.Be provided with successively back-up ring, seal ring, U-shaped seal ring, seal ring, guide sleeve and back-up ring in piston-rod assembly 1 and cylinder cap 2 connecting parts, the cylinder cap of inner shield ring inboard is preset buffer cavity.Cushion collar 4, piston 5, support ring, blocked sewage ring, piston ring, locking nut 6, spring bolt fixed 7 and cushion pins 9 successively in piston-rod assembly 1 front portion.Cushion collar 4 internal diameters are slightly larger than piston rod 1 external diameter of position, external diameter is slightly less than the buffer cavity internal diameter that cylinder cap 2 is preset, form Spielpassung between the buffer cavity of cushion collar 4 and piston rod and inboard wall of cylinder cover, the length of cushion collar 4 is less than the length of cylinder cap buffer cavity, thereby guarantee the degrees of freedom of cushion collar, make it can guarantee coaxality when work, buffering efficient is high.Piston rod 1 front-end face connects cushion pins 9 by circlip 8, can freely swing in operating range, and the cushion hole Spielpassung with on the cylinder bottom plays buffer function.Be provided with the throttle bore supporting with throttle valve 10 in cylinder bottom cushion hole one side.
With reference to accompanying drawing 2, described cushion collar 4 is provided with guide ring 13 and guiding gutter 14 with the piston butt end, and the other end is the working surface of cone, is provided with knuckle 11 in the exterior edge face of working surface, is provided with 3-6 at the outer surface axially spaced-apart of cone and cushions inclined-plane 12.Described buffering inclined-plane 12 swells gradually along the working surface of cone.
The present embodiment adopts new buffer unit structure and mounting type, work structuring relation, the matching relationship of existing cushion collar and cushion pins have been changed, cushion collar and cushion pins can be felt relieved by free floating under the effect of hydraulic oil, when piston rod and cylinder head bore coaxality have deviation, suitable change position is avoided being extruded impaired, prolong the working life of oil cylinder, guaranteed cushioning effect.
What above-described embodiment provided is better mode of execution, in conjunction with the technical solution of the utility model, can produce more embodiment, is protection domain of the present utility model equally.
Claims (5)
1. hydraulic jack is located in a double buffering self-regulation, comprise cylinder cap, piston-rod assembly, the cylinder barrel assembly, cushion collar, piston, locking nut and cushion pins, wherein the cushion collar connecting sleeve is contained in the inboard of piston rod and piston connection part, and peg graft with the buffer cavity of cylinder head bore inwall and to cooperate, cushion pins be located at the piston rod front-end face and with the cushion hole Spielpassung of cylinder bottom, it is characterized in that: cushion collar respectively with piston rod, in buffer cavity in the cylinder head bore forms, external series gap cooperates, the length of cushion collar is less than the length of cylinder cap buffer cavity, and described cushion pins is connected to the piston rod front-end face vertically by circlip.
2. hydraulic jack is located in double buffering self-regulation according to claim 1, it is characterized in that: described cushion collar and piston butt end are provided with guide ring, the other end is the working surface of cone shape, exterior edge face at working surface is provided with knuckle, is provided with 3-6 buffering inclined-plane at the outer surface axially spaced-apart of cone shape.
3. hydraulic jack is located in double buffering self-regulation according to claim 2, it is characterized in that: described buffering inclined-plane swells rear consistent with the cushion collar maximum outside diameter along the working surface of cone gradually.
4. according to claim 1 and 2,3 described double buffering self-regulation location hydraulic jacks, it is characterized in that: three grades of seal rings are adopted in the connecting part at cylinder cap and piston rod, primary seal is U-shaped sealing structure circle in the middle of it, be provided with the throttle bore supporting with throttle valve in cylinder bottom cushion hole one side, radially be provided with lock screw at locking nut and piston rod connecting part.
5. hydraulic jack is located in double buffering self-regulation according to claim 5, it is characterized in that: lock screw exterior edge face and locking nut are by elasticity baffle ring lock fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220403657 CN202718967U (en) | 2012-08-15 | 2012-08-15 | Double buffering self-adjustment positioning hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220403657 CN202718967U (en) | 2012-08-15 | 2012-08-15 | Double buffering self-adjustment positioning hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202718967U true CN202718967U (en) | 2013-02-06 |
Family
ID=47620791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220403657 Expired - Fee Related CN202718967U (en) | 2012-08-15 | 2012-08-15 | Double buffering self-adjustment positioning hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202718967U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613049A (en) * | 2014-11-28 | 2015-05-13 | 三一重型装备有限公司 | Hydraulic oil cylinder and engineering machine |
| CN111828427A (en) * | 2019-04-15 | 2020-10-27 | 油顺精密股份有限公司 | Oil hydraulic cylinder with floating type buffer bush |
-
2012
- 2012-08-15 CN CN 201220403657 patent/CN202718967U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613049A (en) * | 2014-11-28 | 2015-05-13 | 三一重型装备有限公司 | Hydraulic oil cylinder and engineering machine |
| CN111828427A (en) * | 2019-04-15 | 2020-10-27 | 油顺精密股份有限公司 | Oil hydraulic cylinder with floating type buffer bush |
| CN111828427B (en) * | 2019-04-15 | 2022-08-12 | 油顺精密股份有限公司 | Oil hydraulic cylinder with floating type buffer bush |
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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: 20130206 Termination date: 20200815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |