CN204357842U - A kind of oil hydraulic cylinder displacement signal being applicable to engineering machinery detects auxiliary device - Google Patents
A kind of oil hydraulic cylinder displacement signal being applicable to engineering machinery detects auxiliary device Download PDFInfo
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- CN204357842U CN204357842U CN201420786952.6U CN201420786952U CN204357842U CN 204357842 U CN204357842 U CN 204357842U CN 201420786952 U CN201420786952 U CN 201420786952U CN 204357842 U CN204357842 U CN 204357842U
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- fixture
- hydraulic cylinder
- oil hydraulic
- piston rod
- pull bar
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Abstract
The utility model is that a kind of oil hydraulic cylinder displacement signal being applicable to engineering machinery detects auxiliary device, and this device forms primarily of pedestal (10), draw-wire displacement sensor (12), pull bar (14), strut (16) and fixture; Described strut, the lower end of its right-hand member and pedestal is fixed on cylinder barrel fixture support frame (3), and its body of rod has cross-bar-shaped groove, wherein the groove of Vertical direction is connected with pull bar, the groove of substantially horizontal slides with bearing pin (17) and is connected, and this bearing pin and pull bar are fixedly linked; Draw-wire displacement sensor (12) is fixed on the upper end of pedestal, and one end of its stay cord (13) is connected with pull bar upper end by stay cord holding down bolt; Pull bar lower end is connected in the curve bath of fixture support frame (6) by bolt and nut.The utility model can realize namely inserting of oil hydraulic cylinder displacement signal and namely survey, and the displacement signal that can adapt to multiple various outer diameter oil hydraulic cylinder detects, and can prevent the measurement error brought during piston rod rotation.
Description
Technical field
The utility model relates to displacement signal and detects auxiliary device, and particularly a kind of oil hydraulic cylinder displacement signal being applicable to engineering machinery detects auxiliary device.
Background technique
In the Leak testtion of oil hydraulic cylinder, except monitoring except the pressure signal of oil inlet and outlet, also need the displacement signal of monitoring hydraulic cylinder piston rod.This is easy to realize for servo-cylinder and the oil hydraulic cylinder containing built-in magnetostrictive displacement sensor, but very difficult to the oil hydraulic cylinder of engineering machinery.Owing to there is no ready-made installation end face on engineering machinery hydraulic cylinder surface, the draw-wire displacement sensor detected for oil hydraulic cylinder displacement signal cannot be directly fixing on oil hydraulic cylinder surface, corresponding auxiliary device need be designed according to the structural feature of draw-wire displacement sensor, make draw-wire displacement sensor effectively fixing at oil hydraulic cylinder outer surface, in the process that oil hydraulic cylinder normally works, measure the axial displacement signal in piston rod reciprocatory movement exactly.
Following a few class roughly can be divided at present: resistance type, inductance type, ultrasonic type, eddy current sensing and detecting type, magnetic coding type, magnetostriction type etc. to the prior art that piston rod displacement signal detects.Above-mentioned a few class is to the detection technique of the piston rod displacement signal structure changing some parts of oil hydraulic cylinder all in various degree, or special processing is done to some parts, if method for measuring resistance value is to piston bar drill endoporus, resistor cartridge is stretched in piston rod endoporus, determine piston rod displacement according to the magnitude of current determination resistance variations recorded; Magnetic encoding measurement device carries out special coating process to piston rod; outermost surface is chromium protective layer; sublevel is permanent magnet recording layer; third layer is soft magnetic bodies protective layer; innermost layer is the substrate without ferromagnetic characteristic, can not meet the requirement carrying out displacement signal detection under the structural condition not changing oil hydraulic cylinder and piston rod.And, no matter be resistance measurement mode, inductance value metering system, ultrasonic measuring device, magnetic encoding measurement device, magnetostriction measurement device, its measuring device all needs the cylinder barrel being arranged on oil hydraulic cylinder inner, need when carrying out displacement signal measurement to dismantle oil hydraulic cylinder, the requirement of namely inserting in the actual operation process of engineering machinery and namely surveying can not be met.
Summary of the invention
Technical problem to be solved in the utility model is: provide a kind of oil hydraulic cylinder displacement signal being applicable to engineering machinery to detect auxiliary device, effectively can solve the requirement carrying out the detection of oil hydraulic cylinder displacement signal in the actual operation process of engineering machinery.
The technological scheme that the utility model solves the employing of its technical problem is: form primarily of pedestal, draw-wire displacement sensor, pull bar, strut and fixture; Described strut, the lower end of its right-hand member and pedestal is fixed on cylinder barrel fixture support frame, and its body of rod has cross-bar-shaped groove, wherein the groove of Vertical direction is connected with pull bar, and the groove of substantially horizontal is connected with pin slide, and this bearing pin and pull bar are fixedly linked; Draw-wire displacement sensor is fixed on the upper end of pedestal, and one end of its stay cord is connected with pull bar upper end by stay cord holding down bolt; The lower end of pull bar is connected in the curve bath of piston rod fixture support frame by bolt and nut.
Described fixture is made up of piston rod fixture and cylinder barrel fixture, and wherein piston rod fixture is by the second clamping panel clamping piston bar; Cylinder barrel fixture is by the first clamping panel clamping cylinder barrel.
Described piston rod fixture is made up of piston rod fixture support frame, the second clamping panel, screw thread catch bar, handle and rolling bearing, be interference fit between hole on described rolling bearing and the second clamping panel, be interference fit between inner ring on screw thread catch bar and rolling bearing, screw thread catch bar is contained in the tapped hole on supporting frame; Handle is contained in the hole on screw thread catch bar.
Described cylinder barrel fixture is made up of cylinder barrel fixture support frame, the first clamping panel, screw thread catch bar, handle and rolling bearing, be interference fit between hole on described rolling bearing and the first clamping panel, be interference fit between inner ring on screw thread catch bar and rolling bearing, screw thread catch bar is arranged in the tapped hole on cylinder barrel fixture support frame; Handle is contained in the hole on screw thread catch bar.
Described first clamping panel and the second clamping panel are V-type clamping panel.
The utility model compared with prior art has following main beneficial effect:
(1) be applicable to detect the displacement signal of hydraulic cylinder piston rod in the actual job process of engineering machinery.
(2) conveniently carry out installing, measure and dismantling at the practice of construction scene of engineering machinery, namely inserting of oil hydraulic cylinder displacement signal can be realized and namely survey, and the displacement signal that can adapt to multiple various outer diameter oil hydraulic cylinder detects.
(3) in the measuring phase of displacement signal, the parallel of stay cord and oil hydraulic cylinder central axis can be ensured all the time, prevent the measurement error brought during piston rod rotation.
(4) fixture adopts ABS plastic to make, can assurance device is lightweight is convenient for carrying.
Accompanying drawing explanation
Fig. 1 is displacement sensor fixture design proposal general structure schematic diagram.
Fig. 2 is that piston rod fixture and piston rod assemble schematic diagram.
Fig. 3 is that cylinder barrel fixture and cylinder barrel assemble schematic diagram.
Fig. 4 is that rolling bearing and screw thread catch bar assemble schematic diagram.
Fig. 5 is that rolling bearing and clamping panel assemble schematic diagram.
Fig. 6 is bracing structure schematic diagram.
Fig. 7 is the left view of Fig. 6.
Fig. 8 is supporting bar structure schematic diagram.
Fig. 9 is the plan view of Fig. 8.
Figure 10 is pedestal structure schematic diagram.
Figure 11 is the left view of Figure 10.
In figure: 1. cylinder barrel; 2. screw thread catch bar; 3. cylinder barrel fixture support frame; 4. the first clamping panel; 5. piston rod; 6. piston rod fixture support frame; 7. the second clamping panel; 8. handle; 9. screw; 10. pedestal; 11. fastening screw trip bolts; 12. draw-wire displacement sensors; 13. stay cords; 14. pull bars; 15. stay cord holding down bolts; 16. struts; 17. bearing pins; 18. bolts; 19 nuts.
Embodiment
Be further elaborated to the utility model below in conjunction with embodiment and accompanying drawing, but be not only confined to following examples.
The oil hydraulic cylinder displacement signal of engineering machinery that what the utility model provided be applicable to detects auxiliary device, its structure as shown in Figure 1, primarily of pedestal 10, draw-wire displacement sensor 12, pull bar 14, strut 16 and fixture composition, wherein: the right-hand member 1602 of strut 16 is fixed on by screw 9 on the screw hole 301 of cylinder barrel fixture support frame 3 with the lower end 1001 of pedestal 10; Draw-wire displacement sensor 12 is fixed on pedestal 10 upper end 1002 by fastening screw trip bolt 11; Pull bar 14 upper end 1401 is arranged in the groove 1604 of the Vertical direction of strut 16 left end 1601, bearing pin 17 is arranged in the groove 1603 of the substantially horizontal of the left end 1601 of strut 16, and pass the hole 1405 of pull bar 14 upper end 1401, restriction pull bar moves up and down, and makes it can only move along the groove 1603 of the substantially horizontal of the left end 1601 of strut 16.
Described fixture adopts ABS plastic to make, and can be divided into piston rod fixture and cylinder barrel fixture, and wherein piston rod fixture is by the second clamping panel 7 clamping piston bar 5; Cylinder barrel fixture clamps cylinder barrel 1 by the first clamping panel 4.On piston rod fixture and cylinder barrel fixture, same parts comprises: rolling bearing (standard piece), screw thread catch bar 2, handle 8.On piston rod fixture and cylinder barrel fixture, different parts comprise: fixture support frame and clamping panel, and cylinder barrel fixture support frame 3 upper end has two screw holes 301, and the left and right sides has coaxial tapped hole 302; Piston rod fixture support frame 6 upper end has arc groove 602, and the left and right sides has coaxial tapped hole 601, and this tapped hole 601 is identical with the tapped hole 302 of cylinder barrel fixture support frame 3 left and right sides.Described first clamping panel 4 and the second clamping panel 7, its shape, function are identical, just the size of the first clamping panel 4 is made to be greater than the second clamping panel 7 according to actual needs, the working position of clamping panel is V-type, be convenient to the piston rod and the cylinder barrel that clamp different-diameter, the back side of working position has hole 401 (701), for installing rolling bearing and screw thread catch bar 2.
Described piston rod fixture is used for clamping piston bar 5, and the assembling of this fixture and piston rod 5 as shown in Figure 2.Piston rod fixture is made up of supporting frame 6, second clamping panel 7, screw thread catch bar 2, handle 8 and rolling bearing, wherein: screw thread catch bar 2 is arranged in the tapped hole 601 on supporting frame 6; Handle 8 is arranged in the hole 201 on screw thread catch bar 2.
Described cylinder barrel fixture is used for clamping cylinder barrel 1, and the assembling of this fixture and cylinder barrel 1 as shown in Figure 3.Cylinder barrel fixture is made up of supporting frame 3, first clamping panel 4, screw thread catch bar 2, handle 8 and rolling bearing, wherein: screw thread catch bar 2 is arranged in the tapped hole 302 on supporting frame 3; Handle 8 is arranged in the hole 201 on screw thread catch bar 2.
The assembling of described rolling bearing and clamping panel as shown in Figure 5.Wherein: be interference fit between the hole 701 on the outer ring of rolling bearing and the hole 401 of the first clamping panel 4 and the second clamping panel 7, to ensure hole 401 and hole 701 close contact of housing washer and clamping panel, make housing washer relative with clamping panel position fixing.
The assembling of described rolling bearing and screw thread catch bar 2 as shown in Figure 4.Be interference fit between inner ring on screw thread catch bar 2 and rolling bearing, ensure screw thread catch bar 2 and rolling bearing inner ring close contact, rolling bearing inner ring can be rotated with screw thread catch bar 2.
Described pull bar 14 as shown in Figure 6, Figure 7.Wherein: pull bar 14 upper end 1401 has tapped hole 1404, for installing stay cord holding down bolt 15, pull bar 14 upper end 1401 has pin shaft hole 1405, for installing bearing pin 17, pull bar 14 lower end 1402 has groove 1403, is convenient to bolt 18 and passes, and itself and piston rod fixture support frame 6 are linked together.
Described strut 16 as shown in Figure 8, Figure 9.Wherein: strut 16 left end 1601 has cross-bar-shaped groove, the groove of Vertical direction is 1604, the groove of substantially horizontal is 1603, pull bar 14 upper end 1401 is arranged in the groove 1604 of Vertical direction, the groove 1603 that bearing pin 17 is arranged on substantially horizontal is interior also through the hole 1405 of pull bar 14 upper end 1401, pull bar 14 can not be moved up and down, and only have bearing pin 17 to move along the groove 1603 of strut 16 substantially horizontal, strut 16 right-hand member 1602 has two screw holes 1605.
Described pedestal 10 as shown in Figure 10, Figure 11.Wherein: pedestal 10 upper end 1002 has two screw holes 1003, for installing draw-wire displacement sensor 12, lower end 1001 has two screw holes 1004 equally, and pedestal 10 lower end screw hole 1004 is identical with strut 16 right-hand member screw hole 1605.
Strut 16 and pedestal 10, successively through the screw hole 1605 of strut 16 lower end 1602, in the screw hole 1004 of pedestal 10 lower end 1001 and the screw hole 301 of cylinder barrel fixture support frame 3 upper end, are fixed on cylinder barrel fixture support frame 3 by screw 9.
Described draw-wire displacement sensor 12, can adopt the SMW-LX-08 series draw-wire displacement sensor produced by this Ming Wei Science and Technology Ltd. of Shenzhen, maximum range is: 1000mm, and linear precision is 0.05%.Be used for measuring the reciprocating axial displacement of hydraulic cylinder piston rod, it can be fixed on pedestal 10 upper end 1002 by screw 11.
Described stay cord holding down bolt 15 is arranged in the tapped hole 1404 of pull bar 14 upper end 1401, for the stay cord 13 on fixed pulling rope formula displacement transducer 12, make stay cord 13 all the time with oil hydraulic cylinder axis parallel.
Finally by bolt 18 successively through the arc groove 602 on the groove 1403 of pull bar 14 lower end 1402 and piston rod fixture support frame 6, the other end nut 19 is fixedly connected with, when there is the rotation of several angle with piston rod 5 in piston rod fixture in practical work process, in the arc groove 602 of bolt 18 all the time on piston rod fixture support frame 6, ensure that pull bar 14 can not rotate with fixture and piston rod.
Bolt 18 is successively through the arc groove 602 on the groove 1403 of pull bar 14 lower end 1402 and piston rod fixture supports frame 6, and right-hand member nut 19 is fixedly connected with, and makes bolt 18 can rotation in the arc groove 602 on piston rod fixture supports frame 6.
The above-mentioned oil hydraulic cylinder displacement signal being applicable to engineering machinery that the utility model provides detects auxiliary device, is design based on following function and requirement:
1. can while fixed pulling rope sensor, do not change oil hydraulic cylinder and the former resemblance of piston rod and practical structures size;
2. fixture can interfix with oil hydraulic cylinder, can fixedly mount draw-wire displacement sensor again on fixture;
3. the cooperation of fixture and cylinder barrel and piston rod can meet axially locating and can meet again circumference location;
4. fixture can adapt to cylinder barrel and the piston rod of different size scope;
5. clamp central line must and piston rod, oil hydraulic cylinder axis parallel, and ensure that stay cord and axis parallel are to ensure the precision of displacement.
The utility model devises a kind of new device can meet above five conditions, and can be easy for installation and removal, and accomplishes namely to survey namely to use.Wherein, fixture adopts ABS plastic to make, and can weight reduction be convenient for carrying.
The above-mentioned oil hydraulic cylinder displacement signal being applicable to engineering machinery that the utility model provides detects auxiliary device, and its installation, use and demounting procedure are as follows:
One. install and dismounting
1. the installation of fixture:
(1) rolling bearing is arranged in the hole 401 on the first clamping panel and the hole 701 on the second clamping panel, be wherein interference fit between the outer ring of rolling bearing and the hole 401 of clamping panel and hole 701, to ensure the hole close contact of housing washer and clamping panel, make housing washer relative with clamping panel position fixing.
(2) in the tapped hole 302 screw thread catch bar 2 being arranged on supporting frame both sides and tapped hole 601;
(3) being arranged on the inner ring on rolling bearing by non-perforate one end of screw thread catch bar 2, is interference fit between the two, ensures screw thread catch bar 2 and rolling bearing inner ring close contact, rolling bearing inner ring can be rotated with screw thread catch bar 2.
(4) finally handle 8 is arranged in the hole 201 on both sides screw thread catch bar 2.
Installation and the method for dismounting of two sleeve clamps are identical.
2. the coordinating of fixture and cylinder barrel:
Make screw thread catch bar 2 promote the first clamping panel 4 toward middle mobile thus make cylinder barrel remain on the neutral position of fixture along the tapped hole 302 of cylinder barrel fixture support frame 3 both sides by the ambilateral handle 8 of rotating cylinder collet chuck, during handle with sleeve 8, ensure that both sides screw thread catch bar 2 is roughly equal toward the distance of middle movement.
3. the installation of strut, pedestal and displacement transducer:
(1) screw 9 is passed the screw hole 1605 of strut 16 right-hand member 1602 and the screw hole 1004 of pedestal 10 lower end 1001 successively, be fixed on the screw hole 301 of cylinder barrel fixture support frame 3 upper end;
(2) draw-wire displacement sensor 12 is fixed on the screw hole 1003 of pedestal 10 upper end 1002 by screw 11.
4. the coordinating of fixture and piston rod:
Screw thread catch bar 2 is made to promote the past middle movement of the second clamping panel 7 along the tapped hole 601 of piston rod fixture support frame 6 both sides thus make piston rod remain on the neutral position of fixture by the ambilateral handle 8 of rotating piston bar cramp, ensure during handle with sleeve 8 that both sides screw thread catch bar 2 is roughly equal toward the distance of middle movement, piston rod fixture is alignd with the position of cylinder barrel fixture and cylinder barrel fixture support frame 3 is parallel with the datum clamp face of oil hydraulic cylinder with the opening end of piston rod fixture support frame 6 as far as possible.
5. pull bar 14 respectively with the installation of strut 16 and fixture:
(1) installation of pull bar 14 and strut 16.The upper end 1401 of pull bar 14 is arranged in the groove 1604 of strut 16 left end 1601 Vertical direction, the groove 1603 that bearing pin 17 is arranged on substantially horizontal is interior also through the pin shaft hole 1405 of pull bar 14 upper end 1401, pull bar 14 can not be moved up and down, only have bearing pin 17 to slide along the groove 1603 of strut 16 substantially horizontal.
(2) installation of pull bar 14 and piston rod fixture support frame 6.By bolt 18 successively through the arc groove 602 on the groove 1403 of pull bar 14 lower end 1402 and piston rod fixture support frame 6, the other end nut 19 is fixedly connected with, when there is the rotation of several angle with piston rod 5 in piston rod fixture in practical work process, in the arc groove 602 of bolt 18 all the time on piston rod fixture support frame 6, ensure that pull bar 14 can not rotate with fixture and piston rod.
6. stay cord 13 fixing on pull bar 14:
Stay cord 13 is fixed on by stay cord holding down bolt 15 in the tapped hole 1404 of pull bar 14 upper end, ensures stay cord 13 and oil hydraulic cylinder medial axis keeping parallelism.
7. the unloading process of fixture:
The unloading process of fixture is just in time contrary with clamping process.
Two. use
After fixture clamping completes, cylinder barrel fixture and strut 16, pedestal 10, displacement transducer 12 maintain static, and piston rod fixture maintains static relative to piston rod 5, but can rotate within the specific limits along with piston rod 5.
Arc groove 602 on piston rod fixture support frame 6 is grooves that two concentric circles being the center of circle with the medial axis of screw thread catch bar 2 and oil hydraulic cylinder medial axis perpendicular intersection are opened.
Pull bar 14 is connected in the arc groove 602 of piston rod fixture support frame by bolt 18, when there is the rotation of several angle with piston rod 5 in fixture, bolt 18 can rotate in the arc groove 602 of fixture, and bolt 18 can move up and down in the groove 1403 of pull bar 14 lower end 1402 simultaneously.
Because clamping panel is "V"-block, can ensure after fixture clamping completes that screw thread catch bar medial axis is vertical all the time with oil hydraulic cylinder medial axis and in same level, so when cylinder barrel 1 and piston rod 5 diameter change within the specific limits, the position that the stay cord 13 of displacement transducer 12 is connected with pull bar 14 does not need to change.
The above-mentioned oil hydraulic cylinder displacement signal being applicable to engineering machinery that the utility model provides detects auxiliary device, its working procedure is as follows: after each parts installation, do not stretch out state at piston rod 5, the stay cord 13 of draw-wire displacement sensor 12 is fixed on pull bar 14 by stay cord holding down bolt 15.When hydraulic cylinder works, piston rod 5 to-and-fro motion under the effect of pressure medium, stay cord 13 along with stretching out retraction together, thus carries out the measurement of axial displacement in reciprocatory movement to piston rod 5.If when there is the deflection of several angle in piston rod 5 in movement process, bolt 18 can rotate in the groove on piston rod fixture support frame 6, rotate with piston rod 5 to prevent pull bar 14, bolt can move up and down in the groove 1403 of pull bar 14 lower end 1402, when before and after ensureing, fixture has certain deflection angle, pull bar 14 can not move up and down.
Claims (6)
1. the oil hydraulic cylinder displacement signal being applicable to engineering machinery detects an auxiliary device, it is characterized in that forming primarily of pedestal (10), draw-wire displacement sensor (12), pull bar (14), strut (16) and fixture; Described strut (16), the lower end of its right-hand member and pedestal (10) is fixed on cylinder barrel fixture support frame (3), its body of rod has cross-bar-shaped groove, wherein the groove of Vertical direction is connected with pull bar (14), the groove of substantially horizontal slides with bearing pin (17) and is connected, and this bearing pin and pull bar (14) are fixedly linked; Draw-wire displacement sensor (12) is fixed on the upper end of pedestal (10), and one end of its stay cord (13) is connected with pull bar (14) upper end by stay cord holding down bolt; Pull bar (14) lower end is connected in the curve bath of piston rod fixture support frame (6) by bolt and nut.
2. oil hydraulic cylinder displacement signal according to claim 1 detects auxiliary device, it is characterized in that described fixture is made up of piston rod fixture and cylinder barrel fixture, and wherein piston rod fixture is by the second clamping panel (7) clamping piston bar (5); Cylinder barrel fixture is by the first clamping panel (4) clamping cylinder barrel (1).
3. oil hydraulic cylinder displacement signal according to claim 2 detects auxiliary device, it is characterized in that described piston rod fixture is made up of piston rod fixture support frame (6), the second clamping panel (7), screw thread catch bar, handle and rolling bearing, be interference fit between hole on described rolling bearing and the second clamping panel (7), be interference fit between inner ring on screw thread catch bar and rolling bearing, screw thread catch bar is contained in the tapped hole on supporting frame (6); Handle is contained in the hole on screw thread catch bar.
4. oil hydraulic cylinder displacement signal according to claim 3 detects auxiliary device, it is characterized in that described second clamping panel (7) is V-type clamping panel.
5. oil hydraulic cylinder displacement signal according to claim 2 detects auxiliary device, it is characterized in that described cylinder barrel fixture is made up of cylinder barrel fixture support frame (3), the first clamping panel (4), screw thread catch bar, handle and rolling bearing, be interference fit between hole on described rolling bearing and the first clamping panel (4), be interference fit between inner ring on screw thread catch bar and rolling bearing, screw thread catch bar is arranged in the tapped hole on cylinder barrel fixture support frame (3); Handle is contained in the hole on screw thread catch bar.
6. oil hydraulic cylinder displacement signal according to claim 5 detects auxiliary device, it is characterized in that described first clamping panel (4) is V-type clamping panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786952.6U CN204357842U (en) | 2014-12-12 | 2014-12-12 | A kind of oil hydraulic cylinder displacement signal being applicable to engineering machinery detects auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786952.6U CN204357842U (en) | 2014-12-12 | 2014-12-12 | A kind of oil hydraulic cylinder displacement signal being applicable to engineering machinery detects auxiliary device |
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| Publication Number | Publication Date |
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| CN204357842U true CN204357842U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420786952.6U Expired - Fee Related CN204357842U (en) | 2014-12-12 | 2014-12-12 | A kind of oil hydraulic cylinder displacement signal being applicable to engineering machinery detects auxiliary device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952714A (en) * | 2016-07-12 | 2016-09-21 | 天津优瑞纳斯液压机械有限公司 | Externally arranged displacement sensor for dynamic testing of hydraulic cylinder |
| CN108895060A (en) * | 2018-09-10 | 2018-11-27 | 江阴市洪腾机械有限公司 | A kind of built-in stroke measurment hydraulic cylinder |
| CN114278648A (en) * | 2021-12-30 | 2022-04-05 | 靖江市南征机械科技有限公司 | Power matching test tool for hydraulic element |
-
2014
- 2014-12-12 CN CN201420786952.6U patent/CN204357842U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952714A (en) * | 2016-07-12 | 2016-09-21 | 天津优瑞纳斯液压机械有限公司 | Externally arranged displacement sensor for dynamic testing of hydraulic cylinder |
| CN108895060A (en) * | 2018-09-10 | 2018-11-27 | 江阴市洪腾机械有限公司 | A kind of built-in stroke measurment hydraulic cylinder |
| CN114278648A (en) * | 2021-12-30 | 2022-04-05 | 靖江市南征机械科技有限公司 | Power matching test tool for hydraulic element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20191212 |
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| CF01 | Termination of patent right due to non-payment of annual fee |