CN102562706B - Integrated servo cylinder - Google Patents

Integrated servo cylinder Download PDF

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Publication number
CN102562706B
CN102562706B CN201210042228.8A CN201210042228A CN102562706B CN 102562706 B CN102562706 B CN 102562706B CN 201210042228 A CN201210042228 A CN 201210042228A CN 102562706 B CN102562706 B CN 102562706B
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CN
China
Prior art keywords
shell
cylinder
piston rod
piston
sliding brush
Prior art date
Application number
CN201210042228.8A
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Chinese (zh)
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CN102562706A (en
Inventor
陈江峰
Original Assignee
无锡亿利大机械有限公司
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Priority to CN201210042228.8A priority Critical patent/CN102562706B/en
Publication of CN102562706A publication Critical patent/CN102562706A/en
Application granted granted Critical
Publication of CN102562706B publication Critical patent/CN102562706B/en

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Abstract

The invention relates to an integrated servo cylinder which is characterized in that a cavity along the length direction of the piston rod is arranged on a piston and a piston rod, a displacement sensor is arranged in the cavity, one end of the displacement sensor is connected with the inner lateral surface of an end cover, and the other end of the displacement sensor is connected with the upper end of the piston rod. According to the integrated servo cylinder, the displacement sensor is integrated in the oil cylinder, so that the integrated servo cylinder is small in volume, compact in structure, high in position measurement accuracy, capable of being integrated into a hydraulic control system in a modularized way, low in manufacturing cost, long in service life and convenient to install and use. In addition, as the internal parts of the displacement sensor adopt insulating oil which is isolated from the hydraulic oil, and the pressure is compensated by a compensating leather bag, the displacement sensor is stable in work and long in service life. The displacement sensor is arranged in the cavity on the piston and the piston rod, so that the working pushing force of the cylinder is not affected at all.

Description

Integrated servo cylinder

Technical field

The present invention relates to a kind of hydraulic jack, especially relate to a kind of integrated servo cylinder.

Background technique

Hydraulic jack mostly just uses as hydraulic load, and in the system needing position feedback, hydraulic jack and position feedback device separate design and use.And at automation field; manipulator needs to arrive certain position; this measures the exact position of oil cylinder with regard to needing; usual meeting increases sensor at the piston head place of the outside of oil cylinder and measures; this structural type can cause the bulky of oil cylinder, measure inaccurate, and mechanism is not compact; install inconvenient, and manufacture cost is high.

Summary of the invention

The applicant, for above-mentioned problem, is studied improvement, and provide a kind of integrated servo cylinder, volume is little, compact structure, and precision is high, low cost of manufacture, and long service life is easy to install.

In order to solve the problems of the technologies described above, the present invention adopts following technological scheme:

A kind of integrated servo cylinder, comprise cylinder body, one end fixed installation end cap of cylinder body, is provided with piston in cylinder body, piston and inboard wall of cylinder block hydraulic seal, piston connects piston rod, piston rod one end is stretched out outside cylinder body, and described piston and piston rod are provided with the cavity along described piston rod length direction, and displacement transducer is arranged in described cavity, one end of institute's displacement sensors connects the inner side surface of described end cap, and the other end of institute's displacement sensors connects the upper end of described piston rod.

Further:

Institute's displacement sensors comprises shell, and described shell is the tubulose that one end is closed, and resistance coil is inlaid in described shell; The lower end of sliding brush holder support is provided with sliding brush, and described sliding brush holder support is removably set in described shell, and described shell is stretched out in the upper end of described sliding brush holder support, and described sliding brush is slidably matched with described resistance coil; Be provided with seal ring between the opening end of described shell and described sliding brush holder support, in described shell, be filled with insulating oil; The bottom of described shell is coated with compensation leather bag, and described shell is provided with the through hole of inner chamber and the described compensation leather bag being communicated with described shell.

Described insulating oil is detergent alkylate insulating oil.

Technique effect of the present invention is:

A kind of integrated servo cylinder disclosed by the invention, in oil cylinder, volume is little by integrated for displacement transducer, compact structure, and positional accuracy measurement is high, can modularization be integrated in hydraulic control system, low cost of manufacture, long service life, easy to install; In addition, because displacement transducer inside have employed the insulating oil isolated with hydraulic oil, pressure compensates by compensating leather bag, working stability, and the life-span is long; And displacement transducer is arranged in the cavity on piston and piston rod, and the working thrust of oil cylinder is not affected.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Fig. 2 is the structural representation of displacement transducer.

Embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.

As shown in Figure 1, 2, the present invention includes cylinder body 1, one end fixed installation end cap 4 of cylinder body 1, cylinder body 1 and end cap 4 are respectively equipped with turnover oilhole 7, be provided with piston 3 in cylinder body 1, the inwall hydraulic seal of piston 3 and cylinder body 1, piston 3 connects piston rod 2, piston rod 2 one end is stretched out outside cylinder body 1, piston rod 2 and cylinder body 1 and be provided with seal ring between cylinder body 1 and end cap 4.Piston 3 and piston rod 2 are provided with the cavity 5 along piston rod 2 length direction, and displacement transducer 6 is arranged in cavity 5, and one end of displacement transducer 6 connects the inner side surface of end cap 4, and the other end of displacement transducer 6 connects the upper end of piston rod 2.Displacement transducer 6 comprises shell 602, the tubulose that shell 602 is closed in one end, resistance coil 603 is inlaid in shell 602, the lower end of sliding brush holder support 601 is provided with sliding brush 606, sliding brush holder support 601 is removably set in shell 602, shell 602 is stretched out in the upper end of sliding brush holder support 601, and sliding brush 606 is slidably matched with resistance coil 603.Be provided with seal ring 607 between the opening end of shell 602 and sliding brush holder support 601, be filled with insulating oil in shell 602, in the present embodiment, insulating oil is detergent alkylate insulating oil.The bottom of shell 602 is coated with and compensates leather bag 604, and shell 602 is provided with the inner chamber being communicated with shell 602 and the through hole 605 compensating leather bag 604, compensates leather bag 604 and is made up of oil resistant rubber, can stretch by external pressure.The lower end of the shell 602 of displacement transducer 6 connects the inner side surface of end cap 4, the circuit of displacement transducer 6 adopts glue sealing at end cap 4 place and draws wire by end cap 4, the upper end of the sliding brush holder support 601 of displacement transducer 6 connects the upper end of piston rod 2, during use, sliding brush holder support 601 is with the slip of piston 3 and piston rod 2, sliding brush 606 is made to produce relative sliding with resistance coil 603, the current location of piston 3 and piston rod 2 can be accurately measured thus and feed back to control system, being realized the accurate control of operation of oil cylinde by control system.In the present embodiment, use the rheostat of maximum 10K as the resistance coil 603 of displacement transducer 6, be 9.2K ohm when piston stroke is maximum, 0.6K ohm when stroke is minimum, stroke and resistance value linear change, when movable under the driving of oil cylinder at hydraulic pressure, can measure when the exact position residing for secondary piston.

Because displacement transducer 6 uses in high pressure oil, the internal structure of displacement transducer 6 have employed full-metallic design, wire-wound resistor slide design is adopted between sliding brush 606 and resistance coil 603, and be immersed in detergent alkylate insulating oil in the shell 602 that sliding brush 606 and resistance coil 603 are enclosed in displacement transducer 6, isolated with hydraulic oil, thus avoid the bad connection causing sensor, and cause the instability of measurement, guarantee the reliability used; Simultaneous displacement sensor 6 have employed oil-filled compensated pressure-resistance structure; insulating oil is full of in displacement transducer 6 inside; high pressure in oil cylinder chamber carrys out only by compensating the compression of leather bag 604 volume shrinkage that compensate for displacement sensor 6 produces because of conducting pressure; thus make the pressure inside and outside displacement transducer 6 identical, shell 602 is played a protective role.In addition, displacement transducer 6 is arranged on piston 3 with in the cavity 5 on piston rod 2, can bear the pressure of high pressure liquid force feed, and the working thrust of oil cylinder is not affected.

Claims (2)

1. an integrated servo cylinder, comprise cylinder body, one end fixed installation end cap of cylinder body, piston is provided with in cylinder body, piston and inboard wall of cylinder block hydraulic seal, piston connects piston rod, piston rod one end is stretched out outside cylinder body, it is characterized in that: described piston and piston rod are provided with the cavity along described piston rod length direction, displacement transducer is arranged in described cavity, one end of institute's displacement sensors connects the inner side surface of described end cap, the other end of institute's displacement sensors connects the upper end of described piston rod, institute's displacement sensors comprises shell, described shell is the tubulose that one end is closed, resistance coil is inlaid in described shell, the lower end of sliding brush holder support is provided with sliding brush, and described sliding brush holder support is removably set in described shell, and described shell is stretched out in the upper end of described sliding brush holder support, and described sliding brush is slidably matched with described resistance coil, be provided with seal ring between the opening end of described shell and described sliding brush holder support, in described shell, be filled with insulating oil, the bottom of described shell is coated with compensation leather bag, and described shell is provided with the through hole of inner chamber and the described compensation leather bag being communicated with described shell.
2. according to integrated servo cylinder according to claim 1, it is characterized in that: described insulating oil is detergent alkylate insulating oil.
CN201210042228.8A 2012-02-23 2012-02-23 Integrated servo cylinder CN102562706B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210042228.8A CN102562706B (en) 2012-02-23 2012-02-23 Integrated servo cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210042228.8A CN102562706B (en) 2012-02-23 2012-02-23 Integrated servo cylinder

Publications (2)

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CN102562706A CN102562706A (en) 2012-07-11
CN102562706B true CN102562706B (en) 2015-02-04

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437833B (en) * 2013-09-09 2016-05-25 中国航空动力机械研究所 Air inlet guide vane adjusting device
CN106640834B (en) * 2016-12-30 2018-10-02 徐州重型机械有限公司 Hydraulic cylinder, hydraulic system and crane
CN108343656B (en) * 2018-01-31 2020-04-07 中国船舶科学研究中心(中国船舶重工集团公司第七0二研究所) Deep sea self-adaptive clamping device and self-adaptive clamping method thereof
CN110778565A (en) * 2019-10-31 2020-02-11 北京机械设备研究所 Single-rod servo electric cylinder with embedded linear displacement sensor

Citations (10)

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Publication number Priority date Publication date Assignee Title
DE3245501A1 (en) * 1982-12-09 1984-06-14 Battelle Institut E V Displacement sensor
FR2539868A1 (en) * 1983-01-25 1984-07-27 Feuillee Michel Capacitive displacement sensor integrated with a machine member of the piston/cylinder type
JPH0755409A (en) * 1993-08-06 1995-03-03 Shin Caterpillar Mitsubishi Ltd Displacement sensor
JPH11241704A (en) * 1998-02-25 1999-09-07 Amitec:Kk Displacement sensor fitting structure of pin type cylinder
CN101922483A (en) * 2010-07-12 2010-12-22 无锡市长江液压缸厂 Short-range pressure-retaining high-pressure heavy hydraulic cylinder with built-in linear displacement sensor
CN101956742A (en) * 2010-10-25 2011-01-26 潘井仁 Hydraulic hoist cylinder with stroke detection function
CN102121491A (en) * 2011-04-15 2011-07-13 厦门大学 Hydraulic cylinder with position sensing device
JP2011158027A (en) * 2010-02-01 2011-08-18 Santest Co Ltd Fluid pressure actuator which can detect position and load
CN202251247U (en) * 2011-09-13 2012-05-30 盾建重工制造有限公司 Hydraulic cylinder with displacement sensor for shield machine
CN202451499U (en) * 2012-02-23 2012-09-26 无锡亿利大机械有限公司 Integrated servo oil cylinder

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3245501A1 (en) * 1982-12-09 1984-06-14 Battelle Institut E V Displacement sensor
FR2539868A1 (en) * 1983-01-25 1984-07-27 Feuillee Michel Capacitive displacement sensor integrated with a machine member of the piston/cylinder type
JPH0755409A (en) * 1993-08-06 1995-03-03 Shin Caterpillar Mitsubishi Ltd Displacement sensor
JPH11241704A (en) * 1998-02-25 1999-09-07 Amitec:Kk Displacement sensor fitting structure of pin type cylinder
JP2011158027A (en) * 2010-02-01 2011-08-18 Santest Co Ltd Fluid pressure actuator which can detect position and load
CN101922483A (en) * 2010-07-12 2010-12-22 无锡市长江液压缸厂 Short-range pressure-retaining high-pressure heavy hydraulic cylinder with built-in linear displacement sensor
CN101956742A (en) * 2010-10-25 2011-01-26 潘井仁 Hydraulic hoist cylinder with stroke detection function
CN102121491A (en) * 2011-04-15 2011-07-13 厦门大学 Hydraulic cylinder with position sensing device
CN202251247U (en) * 2011-09-13 2012-05-30 盾建重工制造有限公司 Hydraulic cylinder with displacement sensor for shield machine
CN202451499U (en) * 2012-02-23 2012-09-26 无锡亿利大机械有限公司 Integrated servo oil cylinder

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电阻式位移传感器;力学所十二室板壳组;《力学进展》;19760825(第03期);全文 *

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