CN203570747U - Efficient and energy-saving two-way buffer hydraulic oil cylinder - Google Patents
Efficient and energy-saving two-way buffer hydraulic oil cylinder Download PDFInfo
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- CN203570747U CN203570747U CN201320720293.1U CN201320720293U CN203570747U CN 203570747 U CN203570747 U CN 203570747U CN 201320720293 U CN201320720293 U CN 201320720293U CN 203570747 U CN203570747 U CN 203570747U
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- cushion collar
- cushion
- buffer
- piston rod
- piston
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Abstract
An efficient and energy-saving two-way buffer hydraulic oil cylinder comprises a cylinder barrel, a piston rod and a piston, wherein the piston rod stretches into the cylinder barrel through a cylinder head hole, a small cavity cushion collar is arranged on the inner side of the connection portion of the piston rod and the piston through a buffer ring in a sleeved mode, a large cavity cushion collar is installed on the end face of the piston rod through the buffer ring in a sleeved mode, a buffer hole is formed in one end of the cylinder bottom of the cylinder barrel, a buffer cavity is formed between the inner wall of the cylinder head hole and the piston rod, the small cavity cushion collar is in clearance fit with the buffer cavity, the small cavity cushion collar is shorter than the buffer cavity, the large cavity cushion collar is in clearance fit with the buffer hole, and the clearance decreases along with decrease of the matching distance. A novel buffer device structure and an installation mode are adopted, the work structural relationship and matching relationship of existing cushion collars and a cushion pin are changed, the cushion collars can be freely centered, meanwhile, the position is properly changed to avoid damage due to extrusion under the action of sudden external force or under the circumstance that unpredictable external force cannot retreat, the service life of the oil cylinder is prolonged, and the buffer effect is guaranteed.
Description
Technical field
The utility model relates to hydraulic jack field, specifically a kind of energy-efficient engineering machinery hydraulic jack with bidirectional buffer action.
Background technique
Chinese patent CN201593537U discloses a kind of pressure-reducing cushioning oil cylinder, it comprises gray iron, piston, piston rod and hydraulic oil pipe, cylinder cap is located at one end of cylinder body, piston is fixedly mounted on piston rod by piston unt, in cylinder cap, establish buffer cavity, piston rod is provided with the corresponding cushion collar of buffer cavity in size, shape and cylinder cap, and the top of piston rod is provided with cushion pins, and cushion pins coordinates with the cushion hole on cylinder bottom.During the utility model work, when piston stroking upward runs to head side, the cushion collar on piston rod coordinates with the buffer cavity on cylinder cap, has played buffer function, thereby has protected cylinder cap not to be worn; When descent of piston runs to cylinder bottom end, cushion pins coordinates with the cushion hole on cylinder bottom, has played pressure-reducing cushioning effect, thereby has protected piston and cylinder bottom, has improved the working life of oil cylinder.Above-mentioned cushion cylinder in use has two point defects, one, between cushion pins (cushion collar) and piston rod, it is rigid connection, do not there is in the radial direction any buffer capacity, can not remain the coaxality of cushion pins (cushion collar) and cushion hole (buffer cavity), when the two has in slight out-of-alignment situation, if there is cushion pins (cushion collar) under unexpected External Force Acting or under unpredictable External Force Acting can not cushion yielding, easily and between cushion hole (buffer cavity), occur to push and impaired, shortened the working life of oil cylinder; Two, such cushion collar only relies on the working surface of its cone to cushion, and its buffer function is mainly derived from the variation of liquid stream, and the variable quantity of liquid stream is larger, and therefore the effect of its buffering need further raising.
Model utility content
The purpose of this utility model is exactly the defect existing for prior art, provide a kind of cushion collar can free centering, the energy-efficient bidirectional buffering hydraulic jack of long service life and good buffer effect.
The technical solution of the utility model is: comprise cylinder barrel and stretch into piston rod and piston wherein by cylinder head bore, it is characterized in that: the inner side of described piston rod and piston coupling part is set with loculus cushion collar by buffering ring, piston rod end face is set with large chamber cushion collar by buffering ring; Described cylinder barrel cylinder bottom one end is provided with cushion hole, between the inwall of described cylinder head bore and piston rod, forms buffer cavity; Described loculus cushion collar and described buffer cavity Spielpassung, and the length of loculus cushion collar is less than the length of buffer cavity; Described large chamber cushion collar and cushion hole form Spielpassung, and gap reduces along with coordinating the minimizing of distance.By have buffering ring between cushion collar and piston rod, thereby guarantee the degrees of freedom of cushion collar, in certain operating range, can move radially, thereby guarantee that cushion collar is positioned on the axis of piston rod, make its assurance coaxality of freely feeling relieved when work, thereby reduce the damage probability of oil cylinder, improve buffering efficiency.
In order further to improve the effect of hydraulic cushion, described large chamber cushion collar and the external diameter working surface of loculus cushion collar are cone, the exterior edge face of external diameter working surface is provided with knuckle, the outer surface axially spaced-apart of cone is provided with multiple buffering inclined-planes that swell gradually along it, and the external diameter working surface of large chamber cushion collar and loculus cushion collar with and on buffering inclined-plane all with cushion hole or buffer cavity formation Spielpassung.Its principle is: fluid during work in buffer cavity is by the space between buffering inclined-plane and buffer cavity, with crossing the long-pending minimizing of pasta, oil pressure in buffer cavity increases gradually, hydraulic fluid flow rate is by greatly slowly diminishing, slowly discharge, also from fast to slow, while approaching cylinder cap interior edge face (or cylinder bottom), piston slowly stops the moving TAS true airspeed of piston, really played buffer function
Described large chamber cushion collar is the fixing large chamber of interior card key formula cushion collar more preferably.
Compared with prior art, of the present utility model is mainly to adopt novel buffer unit structure and mounting type, work structuring relation, the matching relationship of existing cushion collar and cushion pins have been changed, cushion collar can freely be felt relieved, having under unexpected External Force Acting or under unpredictable external force and can make a concession simultaneously, suitable change position is avoided being extruded impaired, has extended the working life of oil cylinder, has guaranteed cushioning effect.The buffering inclined-plane that protuberance is set at cushion collar outer surface simultaneously, makes hydraulic fluid flow rate by greatly slowly diminishing, slowly discharge, the moving TAS true airspeed of piston also from fast to slow, thereby improve the effect of buffering.
Accompanying drawing explanation
Fig. 1 is a kind of embodiment's of the utility model structural representation.
Fig. 2 is the structural representation of cushion collar in the another kind of embodiment of the utility model.
1. piston rod, 2. cylinder cap, 3. cylinder barrel, 4. loculus cushion collar, 5. piston, 6. locking ring, 7. large chamber cushion collar, 8. buffering ring, 9. card key, 10. cushion hole, 11. buffer cavitys, 12. positioning and guiding rings, 13. throttling grooves, 14. knuckles, 15. buffering inclined-planes.
Embodiment
With reference to Fig. 1, a kind of energy-efficient bidirectional buffering hydraulic jack, mainly by piston rod 1, cylinder cap 2, cylinder barrel 3, loculus cushion collar 4, piston 5, locking ring 6, large chamber cushion collar 7, buffering ring 8, card key 9 compositions such as grade, be positioned at the cylinder bottom of cylinder barrel assembly one end with cushion hole 10, piston rod 1 stretches in cylinder barrel 3 by cylinder head bore, in piston rod 1 and the inner side of piston 5 coupling parts, there is loculus cushion collar 4, between the buffer cavity 11 of the outer wall of loculus cushion collar 4 and cylinder head bore inwall, adopt Spielpassung, the length of loculus cushion collar 4 is less than the length of the buffer cavity 11 of cylinder head bore inwall, loculus cushion collar 4 inwalls coordinate with the cushion collar construction section crest clearance of piston rod 1, between loculus cushion collar 4 and piston rod 1, there is buffering ring 8, buffering ring 8 is quality of rubber materials, elasticity by self realizes buffering, thereby guarantee the degrees of freedom of cushion collar, guarantee on its axis that is positioned at piston rod 1, make it when work, can guarantee coaxality, buffering efficiency is high.Piston rod 1 end face is equipped with the fixing large chamber of interior card key formula cushion collar 7, between large chamber cushion collar 7 and piston rod 1, be also provided with buffering ring 8, can guarantee that equally cushion collar is positioned on the axis of piston rod, and can freely swing in operating range, cushion hole 10 on large chamber cushion collar 7 external diameters and cylinder bottom forms Spielpassung, and along with coordinating the minimizing of distance, reduce, thereby play buffer function.
With reference to 1-2, a kind of energy-efficient bidirectional buffering hydraulic jack, on embodiment 1 basis, loculus cushion collar 4 and large chamber cushion collar 7 adopt following cushion collar structure, entirety is a round cover, there are positioning and guiding ring 12, throttling groove 13 fixing and location use in one end of cover, and the other end is external diameter working surface.The external diameter working surface of cushion collar is cone, and there is a large knuckle 14 exterior edge face of external diameter working surface, on the conical surface, is axially evenly provided with three buffering inclined-planes 15 with buffering mantle cavity binding site.Buffering inclined-plane 15 is consistent with cushion collar maximum outside diameter after swelling gradually along the working surface of cone.
Claims (3)
1. an energy-efficient bidirectional buffering hydraulic jack, comprise cylinder barrel and stretch into piston rod and piston wherein by cylinder head bore, it is characterized in that: the inner side of described piston rod and piston coupling part is set with loculus cushion collar by buffering ring, piston rod end face is set with large chamber cushion collar by buffering ring; Described cylinder barrel cylinder bottom one end is provided with cushion hole, between the inwall of described cylinder head bore and piston rod, forms buffer cavity; Described loculus cushion collar and described buffer cavity Spielpassung, and the length of loculus cushion collar is less than the length of buffer cavity; Described large chamber cushion collar and cushion hole form Spielpassung, and gap reduces along with coordinating the minimizing of distance.
2. energy-efficient bidirectional buffering hydraulic jack according to claim 1, it is characterized in that: described large chamber cushion collar and the external diameter working surface of loculus cushion collar are cone, the exterior edge face of external diameter working surface is provided with knuckle, the outer surface axially spaced-apart of cone is provided with multiple buffering inclined-planes that swell gradually along it, and the external diameter working surface of large chamber cushion collar and loculus cushion collar with and on buffering inclined-plane all with cushion hole or buffer cavity formation Spielpassung.
3. energy-efficient bidirectional buffering hydraulic jack according to claim 1 and 2, is characterized in that: described large chamber cushion collar is the fixing large chamber of interior card key formula cushion collar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320720293.1U CN203570747U (en) | 2013-11-15 | 2013-11-15 | Efficient and energy-saving two-way buffer hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320720293.1U CN203570747U (en) | 2013-11-15 | 2013-11-15 | Efficient and energy-saving two-way buffer hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203570747U true CN203570747U (en) | 2014-04-30 |
Family
ID=50538480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320720293.1U Expired - Fee Related CN203570747U (en) | 2013-11-15 | 2013-11-15 | Efficient and energy-saving two-way buffer hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203570747U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828429A (en) * | 2019-04-15 | 2020-10-27 | 油顺精密股份有限公司 | Oil hydraulic cylinder with buffer rear cover |
| 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 |
-
2013
- 2013-11-15 CN CN201320720293.1U patent/CN203570747U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828429A (en) * | 2019-04-15 | 2020-10-27 | 油顺精密股份有限公司 | Oil hydraulic cylinder with buffer rear cover |
| 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 |
| CN111828429B (en) * | 2019-04-15 | 2023-01-06 | 油顺精密股份有限公司 | Oil hydraulic cylinder with buffer rear cover |
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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: 20140430 Termination date: 20191115 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |