CN102829015B - double-piston oil cylinder - Google Patents
double-piston oil cylinder Download PDFInfo
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- CN102829015B CN102829015B CN201210363004.7A CN201210363004A CN102829015B CN 102829015 B CN102829015 B CN 102829015B CN 201210363004 A CN201210363004 A CN 201210363004A CN 102829015 B CN102829015 B CN 102829015B
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- piston
- cylinder body
- sealing plate
- hydraulic fluid
- fluid port
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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 hydraulic means technical field, it is related to a kind of double-piston cylinder.
Background technology
Oil cylinder be hydraulic energy is changed into mechanical energy, the hydraulic pressure that does straight reciprocating motion (or oscillating motion) executes unit
Part.Its structure is simple, reliable operation.When being realized with it moving back and forth, deceleration device can be removed from, and there is no drive gap,
Stable movement, is therefore used widely in the hydraulic system of various machineries.Oil cylinder power output and piston effective area and its
The pressure reduction on both sides is directly proportional；Oil cylinder is substantially by cylinder body and end cap, piston and piston rod, sealing device, buffer unit and aerofluxuss
Device forms.
In Machine Design, the core of a process equipment is holder part.The rigidity of holder part and clamping oil
Cylinder clamping force size determines the machining accuracy of part to be processed.What guarantee equipment fixture clamped stablizes, and cuts feelings in roughing feed amount
Under condition, clamping cylinder provides enough clamping forces, it appears be even more important.Oil cylinder power output and piston effective area and its both sides
Pressure reduction is directly proportional, and to increase clamping force only according to the pressure improving hydraulic system, and oil pressure can be led to heat up, and leads to hydraulic system unstable
Fixed, also can increase the probability of hydraulic pipeline leakage.And to increase clamping force only according to the cylinder diameter increasing hydraulic jack, it is subject in equipment
It is difficult in the case of limiting to bulk to realize.
Content of the invention
The invention aims to further reduces cost, and it is avoided to improve oil cylinder clamping force and improves hydraulic pressure system
System pressure and cause pipeline reveal and oil temperature rise problem, devise double-piston cylinder.
The present invention is to realize goal of the invention employed technical scheme comprise that, double-piston cylinder, including cylinder body, in the middle part of cylinder body
Sealing plate, piston rod, first piston and second piston；Described sealing plate upper and lower surface is formed with inboard wall of cylinder block respectively
Upper cavity and lower chamber, described piston rod pass through sealing plate to arrange and with sealing plate between seal and is slidably matched, described first work
Fill in and be located in upper cavity and cavity of resorption body respectively with second piston and be all fixedly connected with piston rod；Described upper cavity and lower chamber
Two hydraulic fluid ports being connected with its inside are respectively equipped with the wall of side.
Described cylinder body includes upper cylinder body and lower cylinder body, is connected and upper by means of ring flange between upper cylinder body and lower cylinder body
Cylinder body and lower cylinder body connection end are provided with sealing plate；Form upper cavity, sealing between described sealing plate upper surface and upper cylinder body inwall
Form lower chamber between plate lower surface and lower cylinder body inwall.
Form two cavitys, described first hydraulic fluid port and the second hydraulic fluid port between first piston and upper cylinder body inwall and sealing plate
Connected with two cavitys by oil duct respectively；Also form two cavitys between second piston and lower cylinder body inwall and sealing plate,
Described 3rd hydraulic fluid port and the 4th hydraulic fluid port are connected with two cavitys by oil duct respectively.
The present invention passes through to arrange twice piston, in the case that system pressure is constant, increases clamping force, increases the steady of fixture
Qualitative and reliability, thus improving the machining accuracy of part to be processed, improving the qualification rate of product, reducing processing cost.
Brief description
Fig. 1 is the structural representation of the present invention.
Wherein: 1, lower cylinder body；2nd, second piston；3rd, sealing plate；4th, upper cylinder body；5th, first piston；6th, piston rod；7th, first
Hydraulic fluid port；8th, the second hydraulic fluid port；9th, the 3rd hydraulic fluid port；10th, the 4th hydraulic fluid port.
Specific embodiment
Also specific embodiment is further detailed to the present invention below in conjunction with the accompanying drawings:
Referring to Fig. 1, double-piston cylinder, including cylinder body, the sealing plate 3 in the middle part of cylinder body, piston rod 6, first piston 5 and
Second piston 2；Described sealing plate 3 upper and lower surface forms upper cavity and lower chamber, described piston with inboard wall of cylinder block respectively
Bar 6 arranges through sealing plate 3 and seals and sealing plate 3 and is slidably matched, and described first piston 5 and second piston 2 distinguish position
In upper cavity with cavity of resorption body and all it is fixedly connected with piston rod 6；It is respectively equipped with two on described upper cavity and cavity of resorption body sidewall
With its internal hydraulic fluid port connecting.
Described cylinder body includes upper cylinder body 4 and lower cylinder body 1, between upper cylinder body 4 and lower cylinder body 1 by means of ring flange connect and
It is provided with sealing plate 3 in upper cylinder body 4 and lower cylinder body 1 connection end；On being formed between described sealing plate 3 upper surface and upper cylinder body 4 inwall
Cavity, forms lower chamber between sealing plate 3 lower surface and lower cylinder body 1 inwall.
Form two cavitys, described first hydraulic fluid port 7 He between described first piston 5 and upper cylinder body 4 inwall and sealing plate 3
Second hydraulic fluid port 8 is connected with two cavitys by oil duct respectively；Also shape between second piston 2 and lower cylinder body 1 inwall and sealing plate 3
Become two cavitys, described 3rd hydraulic fluid port 9 is connected with two cavitys by oil duct respectively with the 4th hydraulic fluid port 10.
In specific implementation process, when the second hydraulic fluid port and the 4th hydraulic fluid port oil-feed, the first hydraulic fluid port and the 3rd hydraulic fluid port return the present invention
Oil, under the promotion of the hydraulic fluid pressure in the second hydraulic fluid port and the corresponding cavity of the 4th hydraulic fluid port, first piston and second piston and
Piston rod constitutes a mass motion, and piston rod, as force main body, drives executive component, generation action, acts on and be performed
Element, during off-load, the oil-feed of four hydraulic fluid ports and oil return are in opposite direction, due to driving same piston rod movement using two sets of pistons,
Be equivalent in the case of identical cylinder diameter increase piston area, and under identical systems pressure, the size of piston area and piston
The size of bar thrust output is directly proportional, it is possible under identical system pressure, exporting major diameter oil cylinder with minor diameter oil cylinder
Equal thrust, simultaneously because each oil pocket is by single hydraulic fluid port oil-feed, so moreover it is possible to protect in the case of realizing releasing energetically
Hold the feed speed of minor diameter oil cylinder, improve work efficiency.
Claims (2)
1. double-piston cylinder, including cylinder body and piston rod it is characterised in that: also include sealing plate (3) in the middle part of cylinder body,
One piston (5) and second piston (2)；Described sealing plate (3) upper and lower surface respectively with inboard wall of cylinder block formed upper cavity and
Lower chamber, described piston rod (6) arranges through sealing plate (3) and seals and sealing plate (3) and is slidably matched, and described first
Piston (5) and second piston (2) are located in upper cavity and cavity of resorption body respectively and are all fixedly connected with piston rod (6)；Described epicoele
Body be respectively equipped with cavity of resorption body sidewall two with its internal hydraulic fluid port connecting；
Described cylinder body includes upper cylinder body (4) and lower cylinder body (1), between upper cylinder body (4) and lower cylinder body (1) by means of ring flange even
Connect and be provided with sealing plate (3) in upper cylinder body (4) and lower cylinder body (1) connection end；Described sealing plate (3) upper surface and upper cylinder body (4)
Form upper cavity between inwall, between sealing plate (3) lower surface and lower cylinder body (1) inwall, form lower chamber.
2. double-piston cylinder according to claim 1 it is characterised in that: described upper cylinder body (4) be provided with the first hydraulic fluid port (7) and
Second hydraulic fluid port (8), described lower cylinder body (1) is provided with the 3rd hydraulic fluid port (9) and the 4th hydraulic fluid port (10)；Described first piston (5) and upper cylinder half
Form two cavitys, described first hydraulic fluid port (7) and the second hydraulic fluid port (8) pass through oil respectively between body (4) inwall and sealing plate (3)
Road is connected with two cavitys；Also form two chambeies between described second piston (2) and lower cylinder body (1) inwall and sealing plate (3)
Body, described 3rd hydraulic fluid port (9) is connected with two cavitys by oil duct respectively with the 4th hydraulic fluid port (10).
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 CN102829015A (en) | 2012-12-19 |
| CN102829015B true 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 |
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| CN (1) | CN102829015B (en) |
Families Citing this family (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 |
| CN113700853B (en) * | 2021-09-07 | 2023-02-17 | 潍柴雷沃智慧农业科技股份有限公司 | Tractor synchronizer gear shifting oil cylinder, gear shifting method and tractor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454654A (en) * | 2010-10-28 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Air cylinder |
Family Cites Families (8)
| 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 |
| US6003429A (en) * | 1995-07-06 | 1999-12-21 | Komatsu Ltd. | High speed and high-load cylinder device and method for controlling the same |
| CN1149109A (en) * | 1995-10-26 | 1997-05-07 | 袁焕春 | Multi-stage pressure cylinder |
| CN100516559C (en) * | 2005-08-17 | 2009-07-22 | 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 |
-
2012
- 2012-09-26 CN CN201210363004.7A patent/CN102829015B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454654A (en) * | 2010-10-28 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Air cylinder |
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| Publication number | Publication date |
|---|---|
| CN102829015A (en) | 2012-12-19 |
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