CN202125484U - Large-flow high-pressure oil cylinder provided with unloading buffering mechanism - Google Patents
Large-flow high-pressure oil cylinder provided with unloading buffering mechanism Download PDFInfo
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- CN202125484U CN202125484U CN 201120258804 CN201120258804U CN202125484U CN 202125484 U CN202125484 U CN 202125484U CN 201120258804 CN201120258804 CN 201120258804 CN 201120258804 U CN201120258804 U CN 201120258804U CN 202125484 U CN202125484 U CN 202125484U
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- end cap
- pressure oil
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Abstract
The utility model discloses a large-flow high-pressure oil cylinder provided with an unloading buffering mechanism. An end cover and a base are arranged at two ends of a cylinder barrel respectively, a piston and a piston rod are arranged in the cylinder barrel, the piston is arranged at one end of the piston rod close to the base, and the other end of the piston rod penetrates through the end cover through a shaft hole arranged on the end cover to extend out of the cylinder barrel. The piston is provided with an unloading cavity III penetrating through the piston along the axial direction. A plug and a push rod are arranged at two ends respectively inside the unloading cavity III, a steel ball is arranged between the plug and the push rod, and the plug and the push rod are provided with through holes which penetrate along the axial direction of the piston. A first limiting step is arranged on one side of the unloading cavity III close to the end cover on the outer circumference of the piston rod. A second limiting step is arranged on one side of the inner circumference of the end cover shaft hole close to the base. The large-flow high-pressure oil cylinder has the advantages of being capable of effectively eliminating impact caused by high pressure of high-pressure oil, good in unloading effect, quick in speed and the like.
Description
Technical field
The utility model relates to a kind of high-voltage oil cylinder, especially a kind of big-flow high-pressure oil cylinder that is provided with the off-load damping mechanism.
Background technique
Oil cylinder, promptly oil hydraulic cylinder is a straight line moving type executive component commonly used in the hydraulic system.Piston under the driving of fluid pressure in oil cylinder high-speed motion.When the bar head of piston rod arrived the oil cylinder bottom, piston rod will bump with oil hydraulic cylinder, and piston rod produces oil hydraulic cylinder and impacts, and causes very big noise.Be to reduce the impact of piston rod, all be provided with damping device as first at the bar of piston rod to the oil cylinder bottom.
The big-flow high-pressure oil cylinder is provided with damping device at the piston rod end of travel, to reduce the impact of oil cylinder.Common buffering method has throttling buffering and off-load buffering.In the prior art, general off-load structure is on the cylindrical of cylinder barrel, relief arrangement to be housed.Be connected through aperture between relief arrangement and the cylinder barrel, relief arrangement is connected with hydraulic fluid port through oil guide pipe again.Relief arrangement is made up of parts such as unloading cavity III, plug screw, spring and spools.When piston got into buffer position, fluid flowed into hydraulic fluid port through aperture, relief arrangement, oil guide pipe, is back to fuel tank by hydraulic fluid port, reduced the purpose of piston to the impact of cylinder barrel end face to reduce the power to piston, to reach.In the structure of this existing employing aperture, it is very big that aperture receives that the restriction of cylinder barrel and spool can not open, and difficulty of processing is big, influences the sealability of Sealing on the piston.
The model utility content
The utility model is the deficiency that exists in the above-mentioned prior art for avoiding, and a kind of big-flow high-pressure oil cylinder that is provided with the off-load damping mechanism is provided, with raising hydraulic oil off-load speed, avoid generating heat phenomenon and damage Sealing.
The utility model adopts following technological scheme for the technical solution problem.
Be provided with the big-flow high-pressure oil cylinder of off-load damping mechanism, its structural feature is to comprise cylinder barrel, end cap, base, piston and piston rod; Said end cap and base are arranged at the two ends of said cylinder barrel respectively so that cylinder barrel is sealed, and piston and piston rod are located within the cylinder barrel, and cylinder barrel, end cap, base, piston and piston rod are coaxial settings; Said piston is located on the piston rod near an end of said base, and the piston rod the other end passes end cap through the axis hole on the end cap and stretches out outside the cylinder barrel; Piston is provided with the unloading cavity III that axially runs through piston along it; In said unloading cavity III, be provided with plug at a end near base, be provided with push rod at a end near end cap, between plug and push rod, be provided with steel ball; Said plug is provided with along first through hole of piston shaft to the perforation plug, also is provided with on the said push rod along piston shaft to second through hole that connects push rod; On the piston rod outer circumferential face, be provided with in the side of unloading cavity III and be used for first limited step that anti-throw-out lever skids off from unloading cavity III near end cap; On the inner peripheral surface of end cap axis hole, the side near base is provided with second limited step; Base is provided with first hydraulic fluid port, and said cylinder barrel is provided with second hydraulic fluid port.
The structural feature that the utility model is provided with the big-flow high-pressure oil cylinder of off-load damping mechanism also is:
Said base is the base that has the perforation of earrings shape; One end of base inserts within the said cylinder barrel, and the other end of base stretches out outside the cylinder barrel, and stretching out on the end outside the cylinder barrel of base is located in said earrings shape perforation.
The outer circumferential face of said piston is provided with a plurality of seal rings.
The outer circumferential face of said end cap is provided with a plurality of seal rings.
Said piston is provided with a plurality of unloading cavity III; Said a plurality of unloading cavity III circumferentially evenly distributes along piston.
Compared with present technology, the utility model beneficial effect is embodied in:
The off-load damping mechanism can make the pressure of rodless cavity I consistent with rod chamber II, eliminates the impact that the high pressure oil high pressure causes.Piston is provided with the unloading cavity that axially connects piston more than 1 and 1 as required; The quantity of unloading cavity is set according to the size of off-load flow; Improve the speed of fluid off-load, and, just can as throttling cushions unloading way, can not cause the heating phenomenon because the cross section of unloading cavity is bigger.The off-load damping mechanism is arranged on the piston, can not damage Sealing, and is safe and reliable, and long service life is simple in structure, easily manufactured.Be provided with the perforation of earrings shape, made things convenient for removing and installing of base.Avoid leakage of oil through seal ring is set, improved the sealability of oil cylinder.The big-flow high-pressure oil cylinder of the utility model has and can eliminate advantages such as the effective and speed of impact, off-load that the high pressure oil high pressure causes is fast effectively.
Description of drawings
Fig. 1 is the structural representation of the big-flow high-pressure oil cylinder of the utility model.
Schematic representation when Fig. 2 is the big-flow high-pressure cylinder rod chamber II hydraulic fluid port oil-feed of the utility model.
Schematic representation when Fig. 3 is the big-flow high-pressure oil cylinder rodless cavity I hydraulic fluid port oil-feed of the utility model.
Work schematic representation when Fig. 4 is the off-load of big-flow high-pressure oil cylinder off-load damping mechanism of the utility model.
Label in accompanying drawing 1～accompanying drawing 4: 1 plug, 2 steel balls, 3 push rods, 4 seal rings, 5 pistons, 6 piston rods; 61 first limited steps, 7 cylinder barrels, 71 second hydraulic fluid ports, 8 end caps, 81 second limited steps, 9 bases; The perforation of 91 earrings shapes, 92 first hydraulic fluid ports, I rodless cavity, II rod chamber, III unloading cavity.
Below pass through embodiment, and combine accompanying drawing that the utility model is described further.
Embodiment
Referring to accompanying drawing 1～accompanying drawing 4, be provided with the big-flow high-pressure oil cylinder of off-load damping mechanism, comprise cylinder barrel 7, end cap 8, base 9, piston 5 and piston rod 6; Said end cap 8 and base 9 are arranged at the two ends of said cylinder barrel 7 respectively so that cylinder barrel 7 is sealed, and piston 5 is located within the cylinder barrel 7 with piston rod 6, and cylinder barrel 7, end cap 8, base 9, piston 5 and piston rod 6 are coaxial settings; Said piston 5 is located on the piston rod 6 near an end of said base 9, and piston rod 6 the other ends pass end cap 8 through the axis hole on the end cap 8 and stretch out outside the cylinder barrel 7; Piston 5 is provided with the unloading cavity III that axially runs through piston 5 along it; In said unloading cavity III, be provided with plug 1 at a end near base 9, be provided with push rod 3 at a end near end cap 8, between plug 1 and push rod 3, be provided with steel ball 2; Said plug 1 is provided with along first through hole of piston shaft to perforation plug 1, also is provided with on the said push rod 3 along piston shaft to second through hole that connects push rod; On piston rod 6 outer circumferential faces, be provided with in the side of unloading cavity III and be used for first limited step 61 that anti-throw-out lever 3 skids off from unloading cavity III near end cap 8; On the inner peripheral surface of end cap 8 axis holes,, be provided with second limited step 81 in a side near base 9; Base 9 is provided with first hydraulic fluid port 92, and said cylinder barrel 7 is provided with second hydraulic fluid port 71.Piston is divided into rod chamber and rodless cavity with inner cavity of cylinder, and rod chamber is positioned at piston rod and belongs to a side, and rodless cavity is positioned at a side of piston-rodless.Base is provided with first hydraulic fluid port, and first hydraulic fluid port communicates with rodless cavity.Said cylinder barrel is provided with second hydraulic fluid port, and said second hydraulic fluid port communicates with said rod chamber.This off-load damping mechanism can make the pressure of rodless cavity I consistent with rod chamber II, eliminates the impact that the high pressure oil high pressure causes.Piston is provided with the unloading cavity that axially connects piston more than 1 and 1 as required; The quantity of unloading cavity is set according to the size of off-load flow; Improve the speed of fluid off-load, and, just can as throttling cushions unloading way, can not cause the heating phenomenon because the cross section of unloading cavity is bigger.The off-load damping mechanism is arranged on the piston, can not damage Sealing, and is safe and reliable, and long service life is simple in structure, easily manufactured.
Said base 9 is for having the base of earrings shape perforation 91; One end of base 9 inserts within the said cylinder barrel 7, and the other end of base stretches out outside the cylinder barrel 7, and stretching out on the end outside the cylinder barrel of base is located in said earrings shape perforation 91.Be provided with earrings shape perforation 91 on the base 9, made things convenient for removing and installing of base.
The outer circumferential face of said piston 5 is provided with a plurality of seal rings 4.Be located at the piston outer circumferential face through seal ring, avoid leakage of oil in the matching gap between piston outer circumferential face and the cylinder barrel inner peripheral surface, improved the sealability of oil cylinder.
The outer circumferential face of said end cap 8 is provided with a plurality of seal rings 4.Be located at the end cap outer circumferential face through seal ring, avoid leakage of oil in the matching gap between end cap outer circumferential face and the cylinder barrel inner peripheral surface, improved the sealability of oil cylinder.
Said piston 5 is provided with a plurality of unloading cavity III; Said a plurality of unloading cavity III circumferentially evenly distributes along piston 5.The setting of the number through unloading cavity makes the off-load flow to adjust, and then the off-load speed of adjustment fluid.
Schematic representation when Fig. 2 is the oil-feed of big-flow high-pressure cylinder rod chamber II hydraulic fluid port.When the oil-feed of cylinder rod chamber II hydraulic fluid port, the hydraulic fluid pressure in the rod chamber II is higher than the hydraulic fluid pressure in the rodless cavity I, and steel ball 2 is sealed first through hole on the plug of unloading cavity III, and fluid promotes piston and moves to the base direction.
Schematic representation when Fig. 3 is the oil-feed of big-flow high-pressure oil cylinder rodless cavity I hydraulic fluid port.When the oil-feed of oil cylinder rodless cavity I hydraulic fluid port, rodless cavity I oil pressure is higher than rod chamber II, and steel ball 2 is sealed the through hole of unloading cavity III inner push-rod 3 places one side, and fluid promotes piston 5 and moves to end cap 8 directions.When piston 5 moves near end cap 8; Push rod 3 supports second limited step on the upper end cap end face earlier, and and then push rod 3 promotes steel ball 2, and unloading cavity III is oily excessively; The pressure of rodless cavity I is consistent with rod chamber II; High pressure oil thrust on the piston 5 reduces rapidly, thereby eliminates the impact that the high pressure oil high pressure causes, has at this moment just accomplished the off-load kicking motion one time.
Position as shown in Figure 4 is the structural representation of off-load damping mechanism when being in unloading condition.This moment, steel ball was positioned at the centre of unloading cavity III, can not stop up the through hole at unloading cavity III two ends, thereby make rodless cavity I and rod chamber II be interconnected, and realized the purpose of off-load.
Claims (5)
1. be provided with the big-flow high-pressure oil cylinder of off-load damping mechanism, it is characterized in that, comprise cylinder barrel (7), end cap (8), base (9), piston (5) and piston rod (6); The two ends that said end cap (8) and base (9) are arranged at said cylinder barrel (7) respectively are with cylinder barrel (7) sealing, piston (5) and piston rod (6) are located within the cylinder barrel (7), and cylinder barrel (7), end cap (8), base (9), piston (5) and piston rod (6) are coaxial settings; Said piston (5) is located at piston rod (6) and is gone up the end near said base (9), and piston rod (6) the other end passes end cap (8) through the axis hole on the end cap (8) and stretches out outside the cylinder barrel (7); Piston (5) is provided with the unloading cavity III that axially runs through piston (5) along it; In said unloading cavity III, be provided with plug (1) at a end near base (9), be provided with push rod (3) at a end near end cap (8), between plug (1) and push rod (3), be provided with steel ball (2); Said plug (1) is provided with along first through hole of piston shaft to perforation plug (1), also is provided with on the said push rod (3) along piston shaft to second through hole that connects push rod; On piston rod (6) outer circumferential face, be provided with in the side of unloading cavity III and be used for first limited step (61) that anti-throw-out lever (3) skids off from unloading cavity III near end cap (8); On the inner peripheral surface of end cap (8) axis hole,, be provided with second limited step (81) in a side near base (9); Base (9) is provided with first hydraulic fluid port (92), and said cylinder barrel (7) is provided with second hydraulic fluid port (71).
2. the big-flow high-pressure oil cylinder that is provided with the off-load damping mechanism according to claim 1 is characterized in that, said base (9) is for having the base of earrings shape perforation (91); One end of base (9) inserts within the said cylinder barrel (7), and the other end of base stretches out outside the cylinder barrel (7), and stretching out on the end outside the cylinder barrel of base is located in said earrings shape perforation (91).
3. the big-flow high-pressure oil cylinder that is provided with the off-load damping mechanism according to claim 1 is characterized in that the outer circumferential face of said piston (5) is provided with a plurality of seal rings (4).
4. the big-flow high-pressure oil cylinder that is provided with the off-load damping mechanism according to claim 1 is characterized in that the outer circumferential face of said end cap (8) is provided with a plurality of seal rings (4).
5. the big-flow high-pressure oil cylinder that is provided with the off-load damping mechanism according to claim 1 is characterized in that said piston (5) is provided with a plurality of unloading cavity III; Said a plurality of unloading cavity III circumferentially evenly distributes along piston (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120258804 CN202125484U (en) | 2011-07-21 | 2011-07-21 | Large-flow high-pressure oil cylinder provided with unloading buffering mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120258804 CN202125484U (en) | 2011-07-21 | 2011-07-21 | Large-flow high-pressure oil cylinder provided with unloading buffering mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202125484U true CN202125484U (en) | 2012-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120258804 Expired - Fee Related CN202125484U (en) | 2011-07-21 | 2011-07-21 | Large-flow high-pressure oil cylinder provided with unloading buffering mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202125484U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452956A (en) * | 2013-08-29 | 2013-12-18 | 北汽福田汽车股份有限公司 | Hydraulic cylinder |
| CN103641004A (en) * | 2013-11-25 | 2014-03-19 | 无锡起岸重工机械有限公司 | Trussed marine platform crane variable-amplitude limiting mechanism |
| CN104791325A (en) * | 2015-04-30 | 2015-07-22 | 合肥长源液压股份有限公司 | Pressurization prevention multistage oil cylinder |
| CN114183431A (en) * | 2021-12-03 | 2022-03-15 | 建湖县八达液压机械有限公司 | High-precision hydraulic oil cylinder unloading structure |
-
2011
- 2011-07-21 CN CN 201120258804 patent/CN202125484U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452956A (en) * | 2013-08-29 | 2013-12-18 | 北汽福田汽车股份有限公司 | Hydraulic cylinder |
| CN103452956B (en) * | 2013-08-29 | 2016-02-10 | 北汽福田汽车股份有限公司 | A kind of oil hydraulic cylinder |
| CN103641004A (en) * | 2013-11-25 | 2014-03-19 | 无锡起岸重工机械有限公司 | Trussed marine platform crane variable-amplitude limiting mechanism |
| CN104791325A (en) * | 2015-04-30 | 2015-07-22 | 合肥长源液压股份有限公司 | Pressurization prevention multistage oil cylinder |
| CN104791325B (en) * | 2015-04-30 | 2016-09-07 | 合肥长源液压股份有限公司 | Anti-supercharging multi-stage oil cylinder |
| CN114183431A (en) * | 2021-12-03 | 2022-03-15 | 建湖县八达液压机械有限公司 | High-precision hydraulic oil cylinder unloading structure |
| CN114183431B (en) * | 2021-12-03 | 2024-02-13 | 建湖县八达液压机械有限公司 | High-precision hydraulic cylinder unloading structure |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20200721 |