CN102829015A - Double-piston oil cylinder - Google Patents
Double-piston oil cylinder Download PDFInfo
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- CN102829015A CN102829015A CN2012103630047A CN201210363004A CN102829015A CN 102829015 A CN102829015 A CN 102829015A CN 2012103630047 A CN2012103630047 A CN 2012103630047A CN 201210363004 A CN201210363004 A CN 201210363004A CN 102829015 A CN102829015 A CN 102829015A
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Abstract
The invention discloses a double-piston oil cylinder which comprises a cylinder body, a sealing plate arranged at the middle part of the cylinder body, a piston rod, a first piston and a second piston, wherein the upper surface and the lower surface of the sealing plate respectively form an upper cavity body and a lower cavity body with the inner wall of the cylinder body, the piston rod penetrates through the sealing plate and is in sealing and sliding matching with the sealing plate, the first piston and the second piston are respectively arranged in the upper cavity body and the lower cavity body and both fixedly connected with the piston rod, and two oil ports which are respectively communicated with the interior of the upper cavity body and the internal of the lower cavity body are respectively arranged on the side walls of the upper cavity body and the lower cavity body. The double-piston oil cylinder has the advantages that through arrangement of the two pistons, under the condition of invariable system pressure, clamp force is strengthened, and stability and reliability of a clamp are improved, so that processing accuracy of a processed part is improved, the qualified rate of a product is increased, and the processing cost is lowered.
Description
Technical field
The invention belongs to the hydraulic pressure installation technical field, relate to a kind of double-piston oil cylinder.
Background technique
Oil cylinder with hydraulic pressure can change mechanical energy into, the do straight reciprocating motion hydraulic actuator of (or oscillating motion).Its simple in structure, reliable operation.When realizing to-and-fro motion with it, can remove speed reducer from, and not have drive gap, therefore motion steadily is used widely in the hydraulic system of various machineries.The pressure reduction on oil cylinder ouput force and piston effective area and both sides thereof is directly proportional; Oil cylinder is made up of cylinder body and end cap, piston and piston rod, seal arrangement, damping device and venting gas appliance basically.
In Machine Design, the core of a process equipment is a holder part.The machining accuracy of the rigidity of holder part and clamping cylinder clamping force size decision part to be processed.Stablizing of assurance equipment anchor clamps cramping, under roughing feed amount cutting situation, clamping cylinder provides enough clamping forces, and seeming is even more important.The pressure reduction on oil cylinder ouput force and piston effective area and both sides thereof is directly proportional, and increases clamping force only according to the pressure that improves hydraulic system, can cause oil pressure to heat up, and causes hydraulic system unstable, also can increase the possibility that hydraulic pipe line leaks.And increase clamping force only according to the cylinder diameter that increases hydraulic jack, receive at equipment under the situation of bulk restriction and be difficult for realizing.
Summary of the invention
To the objective of the invention is in order further reducing cost, and to avoid improving hydraulic system pressure and cause the problem that pipeline is revealed and the oil temperature rises, designed the double-piston oil cylinder in order to improve the oil cylinder clamping force.
The present invention for realizing the technological scheme that goal of the invention adopts is, the double-piston oil cylinder, comprise cylinder body, be located at the cylinder body middle part sealing plate, piston rod, first piston and second piston; Said sealing plate upper surface and lower surface form upper cavity and lower chamber with inboard wall of cylinder block respectively; Said piston rod pass the sealing plate setting and and sealing plate between sealed sliding movingly, said first piston and second piston lay respectively in upper cavity and the lower chamber and all are fixedly connected with piston rod; Be respectively equipped with two hydraulic fluid ports with its internal communication on said upper cavity and the lower chamber sidewall.
Said cylinder body comprises upper cylinder body and lower cylinder body, is provided with sealing plate by means of the flange plate connection and at upper cylinder body and lower cylinder body connecting end between upper cylinder body and the lower cylinder body; Form upper cavity between said sealing plate upper surface and the upper cylinder body inwall, form lower chamber between sealing plate lower surface and the lower cylinder body inwall.
Form two cavitys between first piston and upper cylinder body inwall and the sealing plate, said first hydraulic fluid port and second hydraulic fluid port are communicated with two cavitys through oil duct respectively; Also form two cavitys between second piston and lower cylinder body inwall and the sealing plate, said the 3rd hydraulic fluid port and the 4th hydraulic fluid port are communicated with two cavitys through oil duct respectively.
The present invention is through being provided with the twice piston, under the constant situation of system pressure, increases clamping force, increases the stability and the reliability of anchor clamps, thereby improves the machining accuracy of part to be processed, improves the up-to-standard rate of product, reduced processing cost.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Wherein: 1, lower cylinder body; 2, second piston; 3, sealing plate; 4, upper cylinder body; 5, first piston; 6, piston rod; 7, first hydraulic fluid port; 8, second hydraulic fluid port; 9, the 3rd hydraulic fluid port; 10, the 4th hydraulic fluid port.
Embodiment
Below in conjunction with accompanying drawing also specific embodiment the present invention is further explained:
Referring to Fig. 1, the double-piston oil cylinder comprises cylinder body, is located at sealing plate 3, piston rod 6, first piston 5 and second piston 2 at cylinder body middle part; Said sealing plate 3 upper surfaces and lower surface form upper cavity and lower chamber with inboard wall of cylinder block respectively; Said piston rod 6 pass that sealing plate 3 is provided with and and sealing plate 3 between sealed sliding movingly, it is interior with lower chamber and all be fixedly connected with piston rod 6 that said first piston 5 and second piston 2 lay respectively at upper cavity; Be respectively equipped with two hydraulic fluid ports with its internal communication on said upper cavity and the lower chamber sidewall.
Said cylinder body comprises upper cylinder body 4 and lower cylinder body 1, is provided with sealing plate 3 by means of the flange plate connection and at upper cylinder body 4 and lower cylinder body 1 connecting end between upper cylinder body 4 and the lower cylinder body 1; Form upper cavity between said sealing plate 3 upper surfaces and upper cylinder body 4 inwalls, form lower chamber between sealing plate 3 lower surfaces and lower cylinder body 1 inwall.
Form two cavitys between said first piston 5 and upper cylinder body 4 inwalls and the sealing plate 3, said first hydraulic fluid port 7 and second hydraulic fluid port 8 are communicated with two cavitys through oil duct respectively; Also form two cavitys between second piston 2 and lower cylinder body 1 inwall and the sealing plate 3, said the 3rd hydraulic fluid port 9 and the 4th hydraulic fluid port 10 are communicated with two cavitys through oil duct respectively.
The present invention in the practical implementation process, when second hydraulic fluid port and the 4th hydraulic fluid port oil-feed, first hydraulic fluid port and the 3rd hydraulic fluid port oil return; Under the promotion of the hydraulic fluid pressure in the cavity of second hydraulic fluid port and the 4th hydraulic fluid port correspondence, the first piston and second piston and piston rod constitute a mass motion, and piston rod is as application of force main body; The driving execution element produces action, acts on and is performed element; The oil-feed of four hydraulic fluid ports and oil return be in the opposite direction during off-load, owing to adopt the same piston rod movement of two cover piston actuated, is equivalent under the situation of identical cylinder diameter, increase piston area; And under identical systems pressure, the size of piston area is directly proportional with the size of piston rod thrust output, so can be under identical system pressure; The thrust that equates with minor diameter oil cylinder output major diameter oil cylinder, simultaneously since each oil pocket by independent hydraulic fluid port oil-feed, so realizing under the situation about releasing energetically; Can also keep the feed speed of minor diameter oil cylinder, increase work efficiency.
Claims (3)
1. the double-piston oil cylinder comprises cylinder body and piston rod, it is characterized in that: also comprise sealing plate (3), first piston (5) and second piston (2) of being located at the cylinder body middle part; Said sealing plate (3) upper surface and lower surface form upper cavity and lower chamber with inboard wall of cylinder block respectively; Said piston rod (6) pass that sealing plate (3) is provided with and and sealing plate (3) between sealed sliding movingly, it is interior with lower chamber and all be fixedly connected with piston rod (6) that said first piston (5) and second piston (2) lay respectively at upper cavity; Be respectively equipped with two hydraulic fluid ports with its internal communication on said upper cavity and the lower chamber sidewall.
2. double-piston oil cylinder according to claim 1; It is characterized in that: said cylinder body comprises upper cylinder body (4) and lower cylinder body (1), is provided with sealing plate (3) by means of the flange plate connection and at upper cylinder body (4) and lower cylinder body (1) connecting end between upper cylinder body (4) and the lower cylinder body (1); Form upper cavity between said sealing plate (3) upper surface and upper cylinder body (4) inwall, form lower chamber between sealing plate (3) lower surface and lower cylinder body (1) inwall.
3. double-piston oil cylinder according to claim 1; It is characterized in that: form two cavitys between first piston (5) and upper cylinder body (4) inwall and the sealing plate (3), said first hydraulic fluid port (7) and second hydraulic fluid port (8) are communicated with two cavitys through oil duct respectively; Also form two cavitys between second piston (2) and lower cylinder body (1) inwall and the sealing plate (3), said the 3rd hydraulic fluid port (9) and the 4th hydraulic fluid port (10) are communicated with two cavitys through oil duct respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210363004.7A CN102829015B (en) | 2012-09-26 | 2012-09-26 | double-piston oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210363004.7A CN102829015B (en) | 2012-09-26 | 2012-09-26 | double-piston oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102829015A true CN102829015A (en) | 2012-12-19 |
| CN102829015B CN102829015B (en) | 2017-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210363004.7A Active CN102829015B (en) | 2012-09-26 | 2012-09-26 | double-piston oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102829015B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148048A (en) * | 2013-03-26 | 2013-06-12 | 严瑞山 | Multistage-piston hydraulic tension oil cylinder |
| CN111012112A (en) * | 2019-12-12 | 2020-04-17 | 重庆铺力农业股份合作社 | Aquatic product mobile sales table convenient to transport and preserve moisture |
| WO2023035703A1 (en) * | 2021-09-07 | 2023-03-16 | 潍柴雷沃智慧农业科技股份有限公司 | Tractor synchronizer shifting oil cylinder, shifting method, and tractor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2505771A (en) * | 1948-06-16 | 1950-05-02 | Bucyrus Erie Co | Differential cylinder-piston assembly |
| DE3715142A1 (en) * | 1987-05-07 | 1988-11-24 | Weber Richard | Hydraulic or pneumatic drive device |
| JPH0842510A (en) * | 1994-08-04 | 1996-02-13 | Konan Denki Kk | Pneumatic cylinder |
| CN1149109A (en) * | 1995-10-26 | 1997-05-07 | 袁焕春 | Multi-stage pressure cylinder |
| US5634389A (en) * | 1993-11-29 | 1997-06-03 | Northrop Grumman Corporation | Actuator stiffness enhancing system |
| CN1192714A (en) * | 1995-07-06 | 1998-09-09 | 株式会社小松制作所 | High-speed high-load hydraulic cylinder system and control method thereof |
| CN1916430A (en) * | 2005-08-17 | 2007-02-21 | 张锐韬 | Hydraulic cylinder of dual joined bodies |
| JP2012002272A (en) * | 2010-06-16 | 2012-01-05 | Takayoshi Numakura | Hydraulic cylinder and hydraulic drive unit |
| CN102454654A (en) * | 2010-10-28 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Air cylinder |
-
2012
- 2012-09-26 CN CN201210363004.7A patent/CN102829015B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2505771A (en) * | 1948-06-16 | 1950-05-02 | Bucyrus Erie Co | Differential cylinder-piston assembly |
| DE3715142A1 (en) * | 1987-05-07 | 1988-11-24 | Weber Richard | Hydraulic or pneumatic drive device |
| US5634389A (en) * | 1993-11-29 | 1997-06-03 | Northrop Grumman Corporation | Actuator stiffness enhancing system |
| JPH0842510A (en) * | 1994-08-04 | 1996-02-13 | Konan Denki Kk | Pneumatic cylinder |
| CN1192714A (en) * | 1995-07-06 | 1998-09-09 | 株式会社小松制作所 | High-speed high-load hydraulic cylinder system and control method thereof |
| CN1149109A (en) * | 1995-10-26 | 1997-05-07 | 袁焕春 | Multi-stage pressure cylinder |
| CN1916430A (en) * | 2005-08-17 | 2007-02-21 | 张锐韬 | Hydraulic cylinder of dual joined bodies |
| JP2012002272A (en) * | 2010-06-16 | 2012-01-05 | Takayoshi Numakura | Hydraulic cylinder and hydraulic drive unit |
| CN102454654A (en) * | 2010-10-28 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Air cylinder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148048A (en) * | 2013-03-26 | 2013-06-12 | 严瑞山 | Multistage-piston hydraulic tension oil cylinder |
| CN111012112A (en) * | 2019-12-12 | 2020-04-17 | 重庆铺力农业股份合作社 | Aquatic product mobile sales table convenient to transport and preserve moisture |
| WO2023035703A1 (en) * | 2021-09-07 | 2023-03-16 | 潍柴雷沃智慧农业科技股份有限公司 | Tractor synchronizer shifting oil cylinder, shifting method, and tractor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102829015B (en) | 2017-02-01 |
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