CN104265735A - Precise-displacement non-contact hydraulic cylinder - Google Patents
Precise-displacement non-contact hydraulic cylinder Download PDFInfo
- Publication number
- CN104265735A CN104265735A CN201410546615.4A CN201410546615A CN104265735A CN 104265735 A CN104265735 A CN 104265735A CN 201410546615 A CN201410546615 A CN 201410546615A CN 104265735 A CN104265735 A CN 104265735A
- Authority
- CN
- China
- Prior art keywords
- displacement
- contact
- precise
- piston
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 38
- 230000001939 inductive effect Effects 0.000 claims description 8
- 230000006698 induction Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a precise-displacement non-contact hydraulic cylinder. The precise-displacement non-contact hydraulic cylinder comprises a cylinder barrel, and a piston rod and a piston entering the cylinder barrel through a cylinder cover, a hollow hole passage is formed in the center of the piston rod, a position magnet is arranged at the head face, and the position magnet is isolated from the piston rod through a nonmagnetic gasket; a digital sensor is arranged at the bottom of the cylinder barrel, the digital sensor is provided with a displacement induction rod, the displacement induction rod enters the hollow hole passage, and the displacement induction rod and the hollow hole passage can generate non-contact axial relative displacement along with the move of the piston. Compared with the prior art, the precise-displacement non-contact hydraulic cylinder uses a built-in non-contact sensor instead of an original contact sensor and external displacement sensor, the oil cylinder uses zero-friction mounting, and the oil cylinder displacement is measured through the non-contact position magnet; the precise-displacement non-contact hydraulic cylinder has advantages of simple technique, precise displacement measuring and long service life.
Description
Technical field
The present invention relates to hydraulic jack field, specifically the contactless hydraulic jack of a kind of accurate displacement double-action.
Background technique
At present, the measurement of hydraulic cylinder piston rod stroke and displacement is mainly by external contact formula displacement transducer, there are two kinds of defects in actual use, one, the design of contact-type causes sensor to wear and tear comparatively fast because there is friction, and working life is short, the design of its two external is not suitable for using under the condition of extraneous bad environments, the environment that such as high temperature, high pressure, high dust and soda acid are larger, it two is directly exposed in external environment, easily mechanical failure occurs; To sum up there is the defect that working life is short, environmental suitability is poor in prior art, needs to improve.
Summary of the invention
Object of the present invention is exactly the defect existed for prior art, provides a kind of long service life, environmental suitability strong and measures the contactless hydraulic jack of accurate displacement accurately.
Technological scheme of the present invention is: comprise cylinder barrel and stretch into piston rod wherein and piston by cylinder cap, described piston rod central authorities are provided with hollow duct and end face mounting point magnet, and are isolated by non magnetic pad between described position magnet and piston rod; Install digital sensors bottom described cylinder barrel, described digital sensors is installed displacement inductive rod, described displacement inductive rod stretches in described hollow duct and the two can produce non-contacting axial relative displacement with the movement of piston.
Described digital sensors is provided with the wiring harness interface for being connected with outer connected control system.
Compared with prior art, the present invention adopts built-in non-contact sensor device, instead of original touch sensor and outer displacement sensor, oil cylinder adopts to be installed without friction, measure the displacement of oil cylinder by contactless position magnet, have that technique is simple, displacement measurement accurately, the advantage of long service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present invention.
1. piston rod, 2. cylinder cap, 3. hydraulic fluid port, 4. cylinder barrel, 5. displacement inductive rod, 6. piston, 7. position magnet, 8. digital sensors, 9. wiring harness interface, 10. lining.
Embodiment
With reference to Fig. 1, the contactless hydraulic jack of a kind of accurate displacement, comprise cylinder barrel 4 and stretch into piston rod 1 wherein and piston 6 by cylinder cap 2, piston rod 1 central authorities are provided with hollow duct and end face mounting point magnet 7, and are isolated by non magnetic pad between position magnet 7 and piston rod 1; Digital sensors 8 is installed bottom cylinder barrel 4, displacement inductive rod 5 is installed in one end of digital sensors 8, the other end is provided with wiring harness interface 9 for being connected with outer connected control system, and displacement inductive rod 5 stretches in hollow duct and the two can produce non-contacting axial relative displacement with the movement of piston 6.
Above-mentioned hydraulic jack working principle is: mobile displacement inductive rod 5 and the position magnet 7 of driving of piston 6 does relative displacement, the magnetic field induction pulse propagation of position magnet 7 is to digital sensors 8, digital sensors 8 converts electrical signal transfer to again to outside control system, thus reaches the action of precise hard_drawn tuhes oil hydraulic cylinder.
The present invention mainly adopts digital sensors and simple mounting type, instead of original touch sensor and outer displacement sensor, accurately can measure the displacement of oil cylinder, thus improves the productivity of machine operation process, usability and workmanship.Oil cylinder of the present invention adopts to be installed without friction, and measure physical location by contactless position magnet, safe and reliable measurement is accurate, and sensor absolute type working principle can guarantee reliable reading, and without the need to reference point or again demarcate.The machined rear weld seam of oil cylinder is seamless, flawless, if more than 1.5 of its intensity strength of parent times, substantially avoid the damage of weld seam interface to cylinder seal part, there is manufacturing process simple, oil cylinder displacement measurement is accurate, long service life, oil cylinder efficiency high is the ideal product that machine realizes precise hydraulic control.
Claims (2)
1. the contactless hydraulic jack of accurate displacement, comprise cylinder barrel and stretch into piston rod wherein and piston by cylinder cap, it is characterized in that: described piston rod central authorities are provided with hollow duct and end face mounting point magnet, and are isolated by non magnetic pad between described position magnet and piston rod; Install digital sensors bottom described cylinder barrel, described digital sensors is installed displacement inductive rod, described displacement inductive rod stretches in described hollow duct and the two can produce non-contacting axial relative displacement with the movement of piston.
2. accurate displacement hydraulic jack according to claim 1, is characterized in that: described digital sensors is provided with the wiring harness interface for being connected with outer connected control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410546615.4A CN104265735A (en) | 2014-10-16 | 2014-10-16 | Precise-displacement non-contact hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410546615.4A CN104265735A (en) | 2014-10-16 | 2014-10-16 | Precise-displacement non-contact hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265735A true CN104265735A (en) | 2015-01-07 |
Family
ID=52157291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410546615.4A Pending CN104265735A (en) | 2014-10-16 | 2014-10-16 | Precise-displacement non-contact hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265735A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041761A (en) * | 2015-06-08 | 2015-11-11 | 北京精密机电控制设备研究所 | Zero adjustment device for servo actuator |
| CN113074150A (en) * | 2021-04-06 | 2021-07-06 | 北京航空航天大学 | All-welded corrugated pipe type pressurizing oil tank adopting non-contact sensor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0925912A (en) * | 1995-07-10 | 1997-01-28 | Shin Caterpillar Mitsubishi Ltd | Operating speed detecting sensor of cylinder |
| JPH11272332A (en) * | 1998-03-23 | 1999-10-08 | Ishikawajima Harima Heavy Ind Co Ltd | Positioning cylinder device |
| CN101163891A (en) * | 2005-04-22 | 2008-04-16 | 费斯托合资公司 | Drive device comprising a position controller |
| CN201526555U (en) * | 2009-06-25 | 2010-07-14 | 兰州兰石重工新技术有限公司 | Plunger cylinder with built-in stroke detection device |
| CN201714733U (en) * | 2010-06-25 | 2011-01-19 | 格力乐液压系统(常州)有限公司 | Servo hydraulic oil cylinder |
| CN202971391U (en) * | 2012-12-04 | 2013-06-05 | 中联重科股份有限公司 | Piston cylinder and concrete pump with same |
| CN204082774U (en) * | 2014-10-16 | 2015-01-07 | 山东同力液压装备有限公司 | The contactless hydraulic jack of a kind of accurate displacement |
-
2014
- 2014-10-16 CN CN201410546615.4A patent/CN104265735A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0925912A (en) * | 1995-07-10 | 1997-01-28 | Shin Caterpillar Mitsubishi Ltd | Operating speed detecting sensor of cylinder |
| JPH11272332A (en) * | 1998-03-23 | 1999-10-08 | Ishikawajima Harima Heavy Ind Co Ltd | Positioning cylinder device |
| CN101163891A (en) * | 2005-04-22 | 2008-04-16 | 费斯托合资公司 | Drive device comprising a position controller |
| CN201526555U (en) * | 2009-06-25 | 2010-07-14 | 兰州兰石重工新技术有限公司 | Plunger cylinder with built-in stroke detection device |
| CN201714733U (en) * | 2010-06-25 | 2011-01-19 | 格力乐液压系统(常州)有限公司 | Servo hydraulic oil cylinder |
| CN202971391U (en) * | 2012-12-04 | 2013-06-05 | 中联重科股份有限公司 | Piston cylinder and concrete pump with same |
| CN204082774U (en) * | 2014-10-16 | 2015-01-07 | 山东同力液压装备有限公司 | The contactless hydraulic jack of a kind of accurate displacement |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041761A (en) * | 2015-06-08 | 2015-11-11 | 北京精密机电控制设备研究所 | Zero adjustment device for servo actuator |
| CN105041761B (en) * | 2015-06-08 | 2017-04-19 | 北京精密机电控制设备研究所 | Zero adjustment device for servo actuator |
| CN113074150A (en) * | 2021-04-06 | 2021-07-06 | 北京航空航天大学 | All-welded corrugated pipe type pressurizing oil tank adopting non-contact sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150107 |
|
| RJ01 | Rejection of invention patent application after publication |