CN202867422U - Hydraulic cylinder with built-in displacement sensor for displacement detection - Google Patents

Hydraulic cylinder with built-in displacement sensor for displacement detection Download PDF

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Publication number
CN202867422U
CN202867422U CN 201220359894 CN201220359894U CN202867422U CN 202867422 U CN202867422 U CN 202867422U CN 201220359894 CN201220359894 CN 201220359894 CN 201220359894 U CN201220359894 U CN 201220359894U CN 202867422 U CN202867422 U CN 202867422U
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CN
China
Prior art keywords
piston
cylinder barrel
hydraulic jack
displacement
cylinder
Prior art date
Application number
CN 201220359894
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Chinese (zh)
Inventor
欧阳联格
黄红武
葛晓宏
周水庭
叶玮嵘
任剑锋
Original Assignee
厦门理工学院
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Application filed by 厦门理工学院 filed Critical 厦门理工学院
Priority to CN 201220359894 priority Critical patent/CN202867422U/en
Application granted granted Critical
Publication of CN202867422U publication Critical patent/CN202867422U/en

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Abstract

The utility model discloses a hydraulic cylinder with a built-in displacement sensor for displacement detection. The hydraulic cylinder comprises a cylinder tube and a piston, wherein the piston is mounted in the cylinder tube in a sealing manner and adopts a hollow structure; a magnet ring is fixed in the cavity of the piston; the piston is connected with a hollow piston rod; the non-contact magnetostriction linear displacement sensor is fixedly mounted at the bottom in the cylinder tube and is connected with a sensor rod; the sensor rod sticks into the cavities of the piston and the piston rod in a non-contact manner; the linear displacement sensor is connected with a signal connector through a signal wire; the signal connector is mounted on the side surface at the bottom of the cylinder tube; and an ear ring is mounted on the outer side at the bottom of the cylinder tube. The hydraulic cylinder can not only adopt ear ring type connection, but also immediately detect and control the extending displacement of the oil cylinder piston rod, so as to satisfy the requirement for high precision of high-intelligence construction machinery and engineering vehicles.

Description

A kind of inbuilt displacement sensor detects the hydraulic jack of displacement amount

Technical field

The utility model relates to a kind of hydraulic jack, and espespecially a kind of inbuilt displacement sensor detects the hydraulic jack of displacement amount.

Background technique

Hydraulic jack is widely used in engineering machinery, the engineering vehicle, and common hydraulic jack can't detect the length that piston rod stretches out, the length that piston rod that more can't the Precise Control of Oil cylinder stretches out.When needs are flexible when adjusting, usually rely on manual observation, adjustment, labor intensity of operating staff is large, and it is lower to stretch out ratio of precision.Along with the raising of engineering machinery, the intelligent degree of engineering vehicle, the demand of the hydraulic jack of the extrusion of accurately detection, also accurate control piston bar increases day by day.

The technology of existing inbuilt displacement sensor hydraulic jack is: displacement transducer is installed on the outside of cylinder barrel bottom, because the cylinder barrel bottom outside is occupied by displacement transducer, therefore be only applicable to the hydraulic jack of middle hinge shaft connection or spacer flanger-end flange Placement.The main limit that lacks of middle hinge shaft Placement oil cylinder is that oil cylinder can only swing perpendicular to the hinge center, and the motion of other direction is restricted.Any direction of the oil cylinder of spacer flanger and end flange Placement all can not swing.Therefore, concerning the hydraulic jack mounting type must adopt the engineering machinery, engineering vehicle of Earrings type connecting mode, detect and during the extrusion of control piston bar, can only adopt the method for the external displacement transducer that is prone to fault.

The model utility content

Technical problem to be solved in the utility model is to provide a kind of inbuilt displacement sensor to detect the hydraulic jack of displacement amount, this hydraulic jack can detect immediately, immediately control cylinder piston rod stretches out displacement amount, and adopt the earrings Placement, to satisfy the requirements for high precision of the high engineering machinery of intelligent degree, engineering vehicle.

For solving the problems of the technologies described above, technical solution of the present utility model is:

A kind of inbuilt displacement sensor detects the hydraulic jack of displacement amount, comprises cylinder barrel and is seal-installed on the interior piston of cylinder barrel; Described piston is hollow structure, is fixed with a magnet ring in its hollow cavity, and this piston connects a hollow piston rod; The flexible linear displacement transducer of one contactless mangneto is installed in the bottom cylinder of described cylinder barrel regularly, and this linear displacement transducer is connected with a rodmeter, and this rodmeter contactlessly stretches in the hollow cavity of piston and piston rod; And this linear displacement transducer is connected with a signal connector by signaling line, and this signal connector is installed in the side of cylinder barrel bottom; The bottom outside of described cylinder barrel also is provided with an earrings.

Described cylinder barrel is comprised of placket and end cylinder two-part, and being connected between placket and the end cylinder is welded to connect or is threaded.

The rod end of described piston rod is equipped with joint shaft bearing.

On the described earrings joint shaft bearing is installed.

Seal ring and cylinder barrel are installed on the described linear displacement transducer realize sealing.

The bottom sides of described cylinder barrel is equipped with lock screw symmetrically, and this lock screw 4 is supported the side at described linear displacement transducer.

Between described piston and the described cylinder barrel supporting ring is installed.

Described signal connector is installed within the hole of described cylinder barrel bottom sides, and the circumferential position in this hole is decided according to the actual requirements.

Described magnet ring is fixed by a snap ring.

After adopting such scheme, because the utility model is inner with the cylinder barrel that the flexible linear displacement transducer of contactless mangneto is built in hydraulic jack, the cylinder barrel bottom outside just can be used for arranging earrings like this, thereby make hydraulic jack can realize that Earrings type connects, not only can make oil cylinder engineering machinery where take up an official post to swing, and by built-in linear displacement transducer, the displacement amount that stretches out of cylinder piston rod can be immediately detected, immediately control, thereby the requirements for high precision of the high engineering machinery of intelligent degree, engineering vehicle can be satisfied.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is that the A of Fig. 1 is to view.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

What the utility model disclosed is the hydraulic jack that a kind of inbuilt displacement sensor detects displacement amount, as shown in Figures 1 and 2, is preferred embodiment of the present utility model.Described hydraulic jack mainly comprises cylinder barrel 94 and is seal-installed on piston 95 in the cylinder barrel 94, can realize sealing by a seal ring 96 between this piston 95 and the cylinder barrel 94.Described piston 95 is hollow structure, is fixed with a magnet ring 98 in its hollow cavity, and this magnet ring 98 can be fixing by a snap ring 99.Described hollow piston 95 connects a hollow piston rod 93, the relative piston of described cylinder barrel 94 sidewalls 95 both sides have rod chamber hydraulic fluid port 92 and rodless cavity hydraulic fluid port 911, when fluid from rod chamber hydraulic fluid port 92 advance, by rodless cavity hydraulic fluid port 911 out the time, piston rod 93 indentations, otherwise then piston rod 93 stretches out.The flexible linear displacement transducer 912 of one contactless mangneto is installed in the bottom cylinder of described cylinder barrel 94 regularly, seal ring 913 can be installed on this linear displacement transducer 912 realizes sealing with cylinder barrel 94, leak outside to prevent the fluid in the cylinder barrel 94.Described linear displacement transducer 912 is connected with a rodmeter 910, and this rodmeter 910 contactlessly stretches in the hollow cavity of piston 95 and piston rod 93.This linear displacement transducer 912 is connected with a signal connector 915 by signaling line 916, and this signal connector 915 is installed in the side of cylinder barrel 94 bottoms, and the control gear with engineering machinery or engineering vehicle is connected in use.In addition, the rod end of described piston rod 93 can be installed a joint shaft bearing 91, and the bottom outside of described cylinder barrel 94 is provided with an earrings 917, and a joint shaft bearing 918 also can be installed on this earrings 917.For convenient processing and assembling, described cylinder barrel 94 can be comprised of placket 941 and end cylinder 942 two-part, and the connection between placket 941 and the end cylinder 942 can be Type of Welding, also can be thread connecting mode.And described earrings 917 can be as a whole with cylinder 942 moulding of the described end.

Further, described cylinder barrel 94 bottom sides can be equipped with lock screw 914 symmetrically, and this lock screw 914 is supported in the side of described linear displacement transducer 912, in order to prevent moving axially of this linear displacement transducer 912.

One supporting ring 97 also can be installed between described piston 95 and the described cylinder barrel 94, bear lateral force between piston 95 and the cylinder barrel 94 by this supporting ring 97, to prevent that piston 95 from making cylinder barrel 94 scratch and damaging with cylinder barrel 94 direct friction.

Described signal connector 915 is installed within the hole 919 of described cylinder barrel 94 bottom sides, and the circumferential position in this hole 919 can be decided according to the actual requirements.

The working principle of described hydraulic jack is: make under piston 95 and the effect of piston rod 93 at fluid when sliding along cylinder barrel 94 when handling control switch, the moment that intersect in the magnetic field that the current pulse of described rodmeter 910 produces and the magnetic field of magnet ring 98 produces " magnetostriction " phenomenon, thereby make linear displacement transducer 912 sense the variation of described piston 95 displacements, can detect the size of displacement by signal connector 915 output signals, the control gear that also signal can be connected to machine comes control piston bar 93 whether to continue action.

Need to prove that described contactless mangneto telescoping sensor is the sensor of known and mature technology, is not key protection point of the present invention.

The above is preferred embodiment of the present utility model only, is not to limit the scope that the utility model is implemented.So variation or the modification in every case done according to claim of the present utility model and specification all should belong within the scope that the utility model patent contains.

Claims (9)

1. the hydraulic jack of an inbuilt displacement sensor detection displacement amount comprises cylinder barrel and is seal-installed on the interior piston of cylinder barrel, and it is characterized in that: described piston is hollow structure, is fixed with a magnet ring in its hollow cavity, and this piston connects a hollow piston rod; The flexible linear displacement transducer of one contactless mangneto is installed in the bottom cylinder of described cylinder barrel regularly, and this linear displacement transducer is connected with a rodmeter, and this rodmeter contactlessly stretches in the hollow cavity of piston and piston rod; And this linear displacement transducer is connected with a signal connector by signaling line, and this signal connector is installed in the side of cylinder barrel bottom; The bottom outside of described cylinder barrel also is provided with an earrings.
2. a kind of inbuilt displacement sensor according to claim 1 detects the hydraulic jack of displacement amount, and it is characterized in that: described cylinder barrel is comprised of placket and end cylinder two-part, and being connected between placket and the end cylinder is welded to connect or is threaded.
3. a kind of inbuilt displacement sensor according to claim 1 and 2 detects the hydraulic jack of displacement amount, and it is characterized in that: the rod end of described piston rod is equipped with joint shaft bearing.
4. a kind of inbuilt displacement sensor according to claim 1 and 2 detects the hydraulic jack of displacement amount, it is characterized in that: on the described earrings joint shaft bearing is installed.
5. a kind of inbuilt displacement sensor according to claim 1 detects the hydraulic jack of displacement amount, it is characterized in that: seal ring and cylinder barrel are installed on the described linear displacement transducer realize sealing.
6. a kind of inbuilt displacement sensor according to claim 1 detects the hydraulic jack of displacement amount, and it is characterized in that: the bottom sides of described cylinder barrel is equipped with lock screw symmetrically, and this lock screw is supported the side at described linear displacement transducer.
7. a kind of inbuilt displacement sensor according to claim 1 detects the hydraulic jack of displacement amount, it is characterized in that: between described piston and the described cylinder barrel supporting ring is installed.
8. a kind of inbuilt displacement sensor according to claim 1 detects the hydraulic jack of displacement amount, and it is characterized in that: described signal connector is installed within the hole of described cylinder barrel bottom sides.
9. a kind of inbuilt displacement sensor according to claim 1 detects the hydraulic jack of displacement amount, and it is characterized in that: described magnet ring is fixed by a snap ring.
CN 201220359894 2012-07-24 2012-07-24 Hydraulic cylinder with built-in displacement sensor for displacement detection CN202867422U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220359894 CN202867422U (en) 2012-07-24 2012-07-24 Hydraulic cylinder with built-in displacement sensor for displacement detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220359894 CN202867422U (en) 2012-07-24 2012-07-24 Hydraulic cylinder with built-in displacement sensor for displacement detection

Publications (1)

Publication Number Publication Date
CN202867422U true CN202867422U (en) 2013-04-10

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CN 201220359894 CN202867422U (en) 2012-07-24 2012-07-24 Hydraulic cylinder with built-in displacement sensor for displacement detection

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104132022A (en) * 2014-07-30 2014-11-05 湖北三江航天万山特种车辆有限公司 Simple servo oil cylinder
CN104235123A (en) * 2013-12-18 2014-12-24 柳州欧维姆机械股份有限公司 Hydraulic actuator and method for realizing positioning control and position feedback thereof
CN104459189A (en) * 2014-12-05 2015-03-25 四川凌峰航空液压机械有限公司 Actuator cylinder piston rod travel speed measurement device
CN105545834A (en) * 2016-02-14 2016-05-04 秦皇岛燕大一华机电工程技术研究院有限公司 Energy accumulator for online monitoring of piston displacement
CN105715608A (en) * 2014-11-30 2016-06-29 中国科学院沈阳自动化研究所 Underwater hydraulic linear cylinder mechanism with position feedback function
GB2539887A (en) * 2015-06-26 2017-01-04 Caterpillar Sarl Indication system
CN107191432A (en) * 2017-07-28 2017-09-22 南通铁人运动用品有限公司 It is a kind of to monitor the hollow piston rod cylinder of absolute position in real time

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104235123A (en) * 2013-12-18 2014-12-24 柳州欧维姆机械股份有限公司 Hydraulic actuator and method for realizing positioning control and position feedback thereof
CN104235123B (en) * 2013-12-18 2017-02-15 柳州欧维姆机械股份有限公司 Hydraulic actuator and method for realizing positioning control and position feedback thereof
CN104132022A (en) * 2014-07-30 2014-11-05 湖北三江航天万山特种车辆有限公司 Simple servo oil cylinder
CN104132022B (en) * 2014-07-30 2016-08-31 湖北三江航天万山特种车辆有限公司 A kind of simple servo-cylinder
CN105715608A (en) * 2014-11-30 2016-06-29 中国科学院沈阳自动化研究所 Underwater hydraulic linear cylinder mechanism with position feedback function
CN104459189A (en) * 2014-12-05 2015-03-25 四川凌峰航空液压机械有限公司 Actuator cylinder piston rod travel speed measurement device
CN104459189B (en) * 2014-12-05 2017-10-03 四川凌峰航空液压机械有限公司 Pressurized strut piston rod arbitrary distance of run speed measuring device
GB2539887A (en) * 2015-06-26 2017-01-04 Caterpillar Sarl Indication system
US10711429B2 (en) 2015-06-26 2020-07-14 Caterpillar Sarl Indication system for a quick coupler assembly
CN105545834A (en) * 2016-02-14 2016-05-04 秦皇岛燕大一华机电工程技术研究院有限公司 Energy accumulator for online monitoring of piston displacement
CN107191432A (en) * 2017-07-28 2017-09-22 南通铁人运动用品有限公司 It is a kind of to monitor the hollow piston rod cylinder of absolute position in real time

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130410

Termination date: 20150724

EXPY Termination of patent right or utility model