CN201475083U - Force balance type fluid circulation electric cylinder - Google Patents
Force balance type fluid circulation electric cylinder Download PDFInfo
- Publication number
- CN201475083U CN201475083U CN2009202308098U CN200920230809U CN201475083U CN 201475083 U CN201475083 U CN 201475083U CN 2009202308098 U CN2009202308098 U CN 2009202308098U CN 200920230809 U CN200920230809 U CN 200920230809U CN 201475083 U CN201475083 U CN 201475083U
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- piston rod
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- cylinder barrel
- way valve
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Abstract
The utility model discloses a force balance type fluid circulation electric cylinder which comprises a bearing, a screw rod, a screw rod nut and an oil cylinder body, wherein the oil cylinder body comprises a cylinder barrel, a front end cover, a back end cover and a piston rod which can move forward and backward in the cylinder barrel. The front end cover and the back end cover are respectively arranged at the front part and the back part of the cylinder barrel; the screw rod nut is rigidly connected with the piston rod; a first oil container cavity is formed between the screw rod and the piston rod; a second oil container cavity is formed between the cylinder barrel of the oil cylinder body and the piston rod; a first hydraulic oil way port and a second hydraulic oil way port are arranged on the oil cylinder body; a first one-way valve and a second one-way valve which are opposite in flow direction are respectively connected on the first hydraulic oil way port and the second hydraulic oil way port through pipelines; an energy accumulator is connected between the first one-way valve and the second one-way valve through a pipeline; at least one group of first magnetic sensor switches is arranged at the front end of the cylinder barrel, and at least one group of second magnetic sensor switches is arranged at the back end of the cylinder barrel; a permanent magnet guide slider is arranged at the back end of the piston rod; a lead rail is arranged at one side of the cylinder barrel; and an elongation limit protection hydraulic damping and cushioning mechanism and a shrinkage limit protection hydraulic damping and cushioning mechanism are arranged between the oil cylinder body and the piston rod. The first oil container cavity, the second oil container cavity, the one-way valves, the energy accumulator and the connecting pipelines are filled with pressured hydraulic circulating media.
Description
Technical field:
The utility model relates to a kind of electric linear actuation technologies field, is specially a kind of electronic cylinder.
Background technique:
Electronic cylinder is a kind of rotatablely moving of motor to be converted into the integrated machine mechanism of linear telescopic motion, is also referred to as the electric linear final controlling element.Generally pay (or planet screw mandrel, build screw mandrel etc.) and finish power transmission by the motor driving ball screw.Be divided into linear type, returning type, structure type such as rectilinear according to the mounting type of motor.
Electronic cylinder can be realized positioning control, the control of straight line pressure, has the de-energized auto-lock function simultaneously.Electronic cylinder is applied to fields such as industrial robot, numerical control machine tool, chucking device, jacking equipment, multi-degree-of-freedom motion platform, wave maker, reciprocal reciprocating sieve.
There is the application of axial compression loading in electronic cylinder, it is unbalanced that electronic cylinder motor is exported positive reaction torque, greater than the average output torque of negative sense more than one times, the user often selects for use big load motor to solve as the average output torque of forward, has brought the problem of resource and cost waste.
Summary of the invention:
Compression and the equilibrium of elongation axial force when technical problem to be solved in the utility model provides a kind of work, can reduce the output of motor Peak torque, improve electronic cylinder power output dynamic performance, reduce operating noise, prolong the electronic cylinder of service life of equipment.
Technological scheme of the present invention is:
A kind of force balance type electric cylinder featuring fluid circulation, comprise bearing, screw mandrel, the feed screw nut, cylinder body, cylinder body comprises cylinder barrel, front cover, rear end cover and the piston rod that can in cylinder barrel, seesaw, be respectively arranged with front cover before and after the cylinder barrel, rear end cover, screw mandrel is installed on the rear end cover by roller bearings, feed screw nut and piston rod are rigidly connected, form first between screw mandrel and the piston rod and contain oil pocket, between the piston cylinder bar of described cylinder body, form second and contain oil pocket, the first Sheng oil pocket and second is contained oil pocket and is linked up by endoporus, cylinder body is provided with the first hydraulic circuit interface and the second hydraulic circuit interface, be connected respectively by pipeline on the first hydraulic circuit interface and the second hydraulic circuit interface and flow to the first opposite one-way valve and second one-way valve, be connected with accumulator by pipeline between first one-way valve and second one-way valve, first contains oil pocket, second contains oil pocket, first one-way valve, second one-way valve, be full of in accumulator and the connecting pipeline hydraulic pressure of pressure circulatory mediator is arranged.
Be provided with filter between the first hydraulic circuit interface and the second hydraulic circuit interface;
Also can be provided with cooler between the first hydraulic circuit interface and the second hydraulic circuit interface.
The front end of described cylinder barrel is provided with at least one group first Magnetic Induction switch, and the rear end is provided with at least one group second Magnetic Induction switch, and the piston rod rear end is provided with the permanent magnet guide runner, and a side of cylinder barrel is provided with guide rail.
Be provided with elongation limit protection hydraulic damping damping mechanism between cylinder body and the piston rod, also be provided with shrinkage limit protection hydraulic damping damping mechanism between cylinder body and the piston rod.
Be provided with first black box between front cover and the piston rod, be provided with second black box between rear end cover and the screw mandrel, be provided with the 3rd black box between rear end cover, front cover and the cylinder barrel.
Beneficial effect: the utility model be balanced when dynamic and static application apparatus to axial compression loading that electronic cylinder applied, be that the suffered compressive load of electronic cylinder piston rod is adjusted into more among a small circle, help the positive and negative output torque balance of motor dynamically the time like this, utilized the performance characteristic of motor under rated capacity to greatest extent.This motor performance that makes that this electronic cylinder disposed is fully used, energy-saving and emission-reduction, cost reduce, the raising in working life, lubricated, the cooling of the screw mandrel transmission of hydraulic fluid circulation also improvement the simultaneously, noise reduction capability, oil hydraulic circuit also has the circulating filtration ability, has further increased electronic cylinder working reliability, maintainability, the user cost that reduced.
There is the electronic cylinder application of axial compression loading, the electronic cylinder power performance of the present invention for optimizing, electronic cylinder and hydraulic fluid are combined, compression and the unbalanced problem of elongation axial force when having solved under the certain condition electronic cylinder working, realized a kind of force balance type electric cylinder featuring fluid circulation, it comprises electronic cylinder body and hydraulic services and oil circuit.Reduce the output of motor Peak torque, improved electronic cylinder power output dynamic performance, reduced operating noise, improved the screw mandrel greasy property, prolonged service life of equipment, also made things convenient for electronic cylinder cooling, reduced the actuating motor configuration level like this, and significantly reduced application apparatus production and safeguarded user cost.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
Below in conjunction with accompanying drawing force balance type electric cylinder featuring fluid circulation of the present utility model is described further.
A kind of force balance type electric cylinder featuring fluid circulation, comprise support 24, motor 20, motor drum in-phase 21, be with 22 synchronously, screw mandrel synchronizing wheel 23, bearing 2, screw mandrel 1, the feed screw nut 3, cylinder body 19, cylinder body 19 comprises cylinder barrel 6 and the piston rod 4 that can seesaw in cylinder barrel 6, cylinder body 19 front and back are respectively arranged with front cover 7, rear end cover 5, screw mandrel 1 supports by rolling bearing 2 and is installed on the rear end cover 5, feed screw nut 3 and piston rod 4 are rigidly connected, form first between screw mandrel 1 and the piston rod 4 and contain oil pocket 19A, between the cylinder barrel 6 of described cylinder body 19 and piston rod 4, form second and contain oil pocket 19B, first contains oil pocket 19A and second contains oil pocket 19B by endoporus 27 communications, the cylinder barrel 6 of cylinder body 19 is provided with the first hydraulic circuit interface 25 and the second hydraulic circuit interface 26, be connected respectively to flow between the first opposite one-way valve 14 and second one-way valve, 15, the first one-way valves 14 and second one-way valve 15 by pipeline on the first hydraulic circuit interface 25 and the second hydraulic circuit interface 26 and be connected with accumulator 17 by pipeline.
The front end of cylinder barrel 6 is provided with two group of first Magnetic Induction switch 9, and the rear end is provided with two group of second Magnetic Induction switch 9A, and piston rod 4 rear ends are provided with permanent magnet guide runner 11, and a side of cylinder barrel 6 is provided with guide rail 10.
Be provided with elongation limit protection hydraulic damping damping mechanism 13 between front cover 7 and the piston rod 4, be provided with shrinkage limit protection hydraulic damping damping mechanism 12 between screw mandrel 1 front end and the piston rod 4 front end inner chambers.
Be respectively arranged with filter 16 and cooler 18 between present embodiment first one-way valve 14 and the accumulator 17 and between second one-way valve 15 and the accumulator 17, practical application middle filtrator 16 and cooler 18 can be arranged on any link in the circulation of fluid oil circuit.
Be provided with the first black box 8A between front cover 7 and the piston rod 4, be provided with the second black box 8B between rear end cover 5 and the screw mandrel 1, be provided with the 3rd black box 8C between rear end cover 5, front cover 7 and the cylinder barrel 6, all black boies are used for having in the cylinder body 19 sealing and the piston rod guiding of pressing hydraulic oil.
Bearing 2 can be from type single-piece or compound selections such as angular contact ball bearing, deep groove ball bearing, tapered roller bearing, thrust-bearing, angular contact bearing the best; Accumulator 17 can be capsule-type accumulator, piston accumulator etc.; Motor 20 can be actuating motor, stepper motor, generally selects actuating motor.
Cylinder body 19, two groups of one-way valve first one-way valves 14 and second one-way valve 15, filter 16, cooler 18, accumulator 17 have just constituted the hydraulic fluid circulation loop like this, what hydraulic fluid circulation loop prefilled had a lubrication before the work has pressure hydraulic oil, this pressure is greater than the goal pressure of accumulator 17 set pressures and approaching electronic cylinder balance, accumulator 17 air bags or spring are partly compressed, and then make piston rod 4 be subjected to the axial elongation direction hydraulic action of preset equalization, and in piston rod 4 fore and aft motion processes, remain unchanged substantially.
Accumulator 17 effective minimum cylinder volumes select generally to be greater than 4 times of electronic cylinder interior maximum hydraulic pressure volume changes, and it is relatively stable that piston rod 4 presets hydraulic action ability like this.Piston rod presets hydraulic action and multiply by the hydraulic pressure middle pressure for the piston rod sectional area.Fuel tank can be set in the outside and micropump is used for pressurising of electronic cylinder hydraulic pressure and release.Flowing medium can be selected for use and comprise lubricant oil, hydraulic oil or pressurized gas.
Hydraulic fluid circulating oil path working principle: when electronic cylinder piston rod 4 extends, second one-way valve 15 is opened, first one-way valve 14 is closed thereby the low cylinder body pressure outside height of cylinder body 19 internal pressures makes, accumulator 17 stored hydraulic oil inject cylinder body by second one-way valve 15, because the suffered axial elongation active force of the electronic cylinder piston rod of accumulation of energy pressurize effect of accumulator 17 can remain unchanged substantially; When electronic cylinder piston rod 4 shrinks, thereby the high cylinder body pressure outside of cylinder body 19 internal pressures is low to make that second one-way valve 15 is closed, first one-way valve 14 is opened, in the cylinder body 12 unnecessary hydraulic oil inject accumulators 17 by first one-way valve 14 and store, because the electronic cylinder piston rod 4 suffered axial elongation active forces of accumulation of energy pressurize effect of accumulator 17 can remain unchanged equally substantially, 16 filtrations that utilize circulation of fluid to finish hydraulic medium of filter, 18 in cooler utilize hydraulic fluid circulation fully to finish heating power exchange with outside forced-ventilated air.
Electronic cylinder drive lead screw is paid, piston rod, piston rod slide block all immerse in the hydraulic lubricant oil and move, and can significantly reduce electronic cylinder working noise, reduces friction, prolongs electronic cylinder working life.Can use hydraulic oil, low-viscosity oil even pressurized gas as working medium.
When using many force balance type electric cylinder featuring fluid circulations simultaneously, configuration such as accumulator, cooler, filter can be shared, optimizes and use configuration.
Accumulator air bag or spring are adjusted to certain set pressure according to actual needs, what hydraulic fluid circulation loop prefilled had a lubrication before the work has pressure hydraulic oil, this pressure is greater than the goal pressure of accumulator set pressure and approaching electronic cylinder balance, accumulator air bag or spring are partly compressed, and then make piston rod be subjected to the axial elongation direction hydraulic action of preset equalization, and in piston rod fore and aft motion process, remain unchanged substantially.
Claims (6)
1. force balance type electric cylinder featuring fluid circulation, comprise bearing (2), screw mandrel (1), feed screw nut (3), cylinder body (19), cylinder body (19) comprises cylinder barrel (6), front cover (7), rear end cover (5) and the piston rod (4) that can in cylinder barrel (6), seesaw, be respectively arranged with front cover (7) before and after the cylinder barrel (6), rear end cover (5), it is characterized in that: described screw mandrel (1) is supported on the rear end cover (5) by bearing (2), feed screw nut (3) and piston rod (4) are rigidly connected, form first between screw mandrel (1) and the piston rod (4) and contain oil pocket (19A), between the cylinder barrel (6) of described cylinder body (19) and piston rod (4), form second and contain oil pocket (19B), first contains oil pocket (19A) and second contains oil pocket (19B) by endoporus (27) communication, described cylinder body (19) is provided with the first hydraulic circuit interface (25) and the second hydraulic circuit interface (26), the described first hydraulic circuit interface (25) flows to opposite first one-way valve (14) and second one-way valve (15) with last the connection respectively by pipeline of the second hydraulic circuit interface (26), be connected with accumulator (17) by pipeline between described first one-way valve (14) and second one-way valve (15), first contains oil pocket (19A), second contains oil pocket (19B), first one-way valve (14), second one-way valve (15), being full of in accumulator (17) and the connecting pipeline has the hydraulic pressure of pressure circulatory mediator.
2. force balance type electric cylinder featuring fluid circulation according to claim 1 is characterized in that: be provided with filter (16) between the first hydraulic circuit interface (25) and the second hydraulic circuit interface (26).
3. force balance type electric cylinder featuring fluid circulation according to claim 1 is characterized in that: be provided with cooler (18) between the first hydraulic circuit interface (25) and the second hydraulic circuit interface (26).
4. force balance type electric cylinder featuring fluid circulation according to claim 1, it is characterized in that: the front end of described cylinder barrel (6) is provided with at least one group first Magnetic Induction switch (9), the rear end is provided with at least one group second Magnetic Induction switch (9A), described piston rod (4) rear end is provided with permanent magnet guide runner (11), and a side of described cylinder barrel (6) is provided with guide rail (10).
5. force balance type electric cylinder featuring fluid circulation according to claim 1; it is characterized in that: be provided with elongation limit protection hydraulic damping damping mechanism between described cylinder body (19) and the piston rod (4), also be provided with shrinkage limit protection hydraulic damping damping mechanism between cylinder body (19) and the piston rod (4).
6. force balance type electric cylinder featuring fluid circulation according to claim 1, it is characterized in that: be provided with first black box (8A) between described front cover (7) and the piston rod (4), be provided with second black box (8B) between rear end cover (5) and the screw mandrel (1), be provided with the 3rd black box (8C) between rear end cover (5), front cover (7) and the cylinder barrel (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202308098U CN201475083U (en) | 2009-09-04 | 2009-09-04 | Force balance type fluid circulation electric cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202308098U CN201475083U (en) | 2009-09-04 | 2009-09-04 | Force balance type fluid circulation electric cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201475083U true CN201475083U (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202308098U Expired - Lifetime CN201475083U (en) | 2009-09-04 | 2009-09-04 | Force balance type fluid circulation electric cylinder |
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| CN (1) | CN201475083U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649851B (en) * | 2009-09-04 | 2012-04-11 | 无锡智航控制技术有限公司 | Force balance type electric cylinder featuring fluid circulation |
| CN102785549A (en) * | 2012-08-20 | 2012-11-21 | 北京理工大学 | Electric retractable suspension system for amphibious vehicles |
| CN103867515A (en) * | 2012-12-13 | 2014-06-18 | 中国人民解放军空军军训器材研究所 | Actuator |
| CN104135108A (en) * | 2014-08-01 | 2014-11-05 | 北京航空航天大学 | Electric cylinder with buffer |
| CN107215168A (en) * | 2016-03-21 | 2017-09-29 | 西安磁林电气有限公司 | Connect balanced type hydraulic pressure wheel steering support shaft |
| CN108138803A (en) * | 2015-10-22 | 2018-06-08 | 伊格尔工业股份有限公司 | Accumulator |
| CN110757131A (en) * | 2019-11-05 | 2020-02-07 | 东莞大昇自动化机械设备有限公司 | Automatic pressing mechanism |
-
2009
- 2009-09-04 CN CN2009202308098U patent/CN201475083U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649851B (en) * | 2009-09-04 | 2012-04-11 | 无锡智航控制技术有限公司 | Force balance type electric cylinder featuring fluid circulation |
| CN102785549A (en) * | 2012-08-20 | 2012-11-21 | 北京理工大学 | Electric retractable suspension system for amphibious vehicles |
| CN103867515A (en) * | 2012-12-13 | 2014-06-18 | 中国人民解放军空军军训器材研究所 | Actuator |
| CN103867515B (en) * | 2012-12-13 | 2016-06-29 | 中国人民解放军空军军训器材研究所 | A kind of actuator |
| CN104135108A (en) * | 2014-08-01 | 2014-11-05 | 北京航空航天大学 | Electric cylinder with buffer |
| CN108138803A (en) * | 2015-10-22 | 2018-06-08 | 伊格尔工业股份有限公司 | Accumulator |
| CN107215168A (en) * | 2016-03-21 | 2017-09-29 | 西安磁林电气有限公司 | Connect balanced type hydraulic pressure wheel steering support shaft |
| CN107215168B (en) * | 2016-03-21 | 2023-03-28 | 西安磁林电气有限公司 | Communicating balanced type hydraulic wheel steering support shaft |
| CN110757131A (en) * | 2019-11-05 | 2020-02-07 | 东莞大昇自动化机械设备有限公司 | Automatic pressing mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100519 Effective date of abandoning: 20090904 |