CN208106882U - Oil cylinder displacement detection device - Google Patents
Oil cylinder displacement detection device Download PDFInfo
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- CN208106882U CN208106882U CN201721570947.1U CN201721570947U CN208106882U CN 208106882 U CN208106882 U CN 208106882U CN 201721570947 U CN201721570947 U CN 201721570947U CN 208106882 U CN208106882 U CN 208106882U
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Abstract
The utility model relates to detection fields, more particularly to oil cylinder displacement detection device.Oil cylinder displacement detection device.Oil cylinder displacement detection device includes mounting base, detection components, displacement component；Mounting base is fixedly installed in the cylinder ends of oil cylinder, and detection components are installed in mounting base, and the movable member of detection components is connect with displacement component under normal condition, and displacement component is installed on piston rod, the movable member movement of detection components under abnormal condition.Under the utility model normal condition, there is no movement, the movable members of detection components to connect with displacement component for piston rod；Once piston rod moves, displacement component is mobile with piston rod, and the movable member of detection components moves up, generation movement, and by the movement of movable member, detection components determine detection signal according to the movement, successively judges that piston rod is mobile.This programme detects piston rod, and when cylinder piston rod moves, detection trigger device issues signal, keeps equipment out of service, guarantees the safety of equipment operation.
Description
Technical field
The utility model relates to detection fields, more particularly to oil cylinder displacement detection device.
Background technique
Equipment for needing oil cylinder to play anchorage effect needs to detect the movement of oil cylinder, prevents piston
Bar is mobile, once piston rod is mobile, such as flexible, then leads to fastening invalidation, equipment cisco unity malfunction.
Utility model content
(1) technical problems to be solved
The purpose of the utility model is to provide oil cylinder displacement detection devices, solve the mobile test problems of piston rod.
(2) technical solution
In order to solve the above-mentioned technical problem, the utility model provides a kind of oil cylinder displacement detection device comprising mounting base,
Detection components, displacement component；The mounting base is fixedly installed in the cylinder ends of oil cylinder, and the detection components are installed on the peace
It fills on seat, the movable member of the detection components is connect with the displacement component in normal state, and the displacement component is installed on
On the piston rod.
In some embodiments, preferably, the mounting base includes the first skewback, the second skewback, first skewback, institute
Stating the second skewback is in arch bridge shape, and the two is opposite to be installed, and centre surrounds the through-hole for being placed on the cylinder ends, and both ends pass through respectively
Bolt is fixedly connected；
First skewback, second skewback middle part to install the detection components.
In some embodiments, preferably, the detection components include：Limit switch, the limit switch include switch
Main body and rocker arm, one end of the rocker arm are articulated with the switch main body, and idler wheel is arranged in the other end, when the rocker arm and idler wheel turn
When dynamic, switch main body movement；
The switch main body is installed in the mounting base, and the movable member includes the idler wheel, in normal state institute
Idler wheel is stated against the displacement component, under abnormal condition, the idler wheel is detached from the displacement component.
In some embodiments, preferably, the displacement component includes：Slide block structure, the slide block structure are tightly placed in institute
It states on piston rod.
In some embodiments, preferably, the displacement component further includes：Guide frame, the guide frame are installed on
On the slide block structure, to guide the slide block structure to slide along the piston rod axial direction.
In some embodiments, preferably, the guide frame includes：First baffle, second baffle and guide rod；It is described
First baffle is installed on the slide block structure, and is located at the same side of the piston rod with the limit switch；The second gear
Plate is installed on slide block structure, and opposite with the first baffle position；
The first baffle, the second baffle are provided with pilot hole, and the installation is fixed in one end of the guide rod
Seat, the other end pass through the pilot hole and extend, and the guide rod is parallel to the piston rod；
The idler wheel is resisted against the first baffle under normal circumstances.
In some embodiments, preferably, the slide block structure includes：Top shoe and sliding block, the top shoe and institute
Stating sliding block is in arch bridge shape；The two is opposite to be installed, and middle part surrounds the first through hole for being placed on the piston rod, and both ends pass through respectively
Bolt is fixedly connected；
Disc spring is cased on the bolt.
In some embodiments, preferably, the detection components include：Stay wire sensor, the stay wire sensor include
Sensor main body and bracing wire, one end of the bracing wire are fixed on the sensor main body, and the other end is fixed on the displacement component,
When piston rod is mobile, the length of bracing wire between the sensor main body and the displacement component increases.
In some embodiments, preferably, the displacement component includes fixed-block-architecture (FBA) and fixed plate, the fixed agllutination
Structure is tightly placed in the end of the piston rod；
The fixed-block-architecture (FBA) includes：Upper fixed block and lower fixed block, the upper fixing block and the lower fixed block are in
Arch bridge shape；The two is opposite to be installed, and middle part surrounds the through-hole for being placed on the piston rod, and both ends are bolted to connection respectively；
The fixed plate is installed on fixed-block-architecture (FBA), and the same side of piston rod is located at the stay wire sensor；
The fixed bracing wire of the fixed plate, the bracing wire are parallel to the piston rod.
In some embodiments, preferably, the fixed plate is provided with the second through-hole, with the fixation bracing wire.
(3) beneficial effect
Technical solution whole design provided by the utility model, detection components are arranged by mounting base in cylinder ends, position
Move component installation on the piston rod, under normal condition, there is no movement, the movable members and displacement component of detection components for piston rod
Connection；Once piston rod moves, displacement component is mobile with piston rod, and the movable member of detection components moves up, generation movement,
By the movement of movable member, detection components determine detection signal according to the movement, successively judge that piston rod is mobile.This programme is to oil
Cylinder piston rod is detected, and when cylinder piston rod moves, detection trigger device issues signal, keeps equipment out of service,
Guarantee the safety of equipment operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of oil cylinder displacement detection device in the utility model one embodiment；
Fig. 2 is the structural schematic diagram of mounting base in one embodiment；
Fig. 3-1 is the structural schematic diagram of normal condition lower position switch in the utility model embodiment 1；
Fig. 3-2 is the structural schematic diagram of abnormal condition lower position switch in the utility model embodiment 1；
Fig. 4 is the structural schematic diagram of displacement component in the utility model embodiment 1；
Fig. 4-1 is partial structural diagram in Fig. 4；
Fig. 5 is the structural schematic diagram of displacement component in the utility model embodiment 2.
Fig. 6 is the structural schematic diagram of oil cylinder displacement detection device in the utility model embodiment 3；
Fig. 7 is the schematic perspective view of oil cylinder displacement detection device in the utility model Fig. 6.
Note：1 oil cylinder；2 piston rods；3 detection components；4 displacement components；5 mounting bases；7 slide block structures；8 fixed knots
Structure；31 limit switches；32 stay wire sensors；40 top shoes；41 sliding blocks；42 sets；43 location holes；44 disc springs；45
First through hole；46 pilot holes；47 guide rods；48 first baffles；49 second baffles；311 switch main bodies；312 rocker arms；
313 idler wheels；321 sensor main bodies；322 drawstrings；51 first skewbacks；52 second skewbacks；53 flanges；53 thirds are logical
Hole；Fixed block on 81；82 lower fixed blocks；83 fixed plates；84 second through-holes；85 washers.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Example is not intended to limit the scope of the present invention for illustrating the utility model.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements." first " " second " " third " " the 4th " does not represent any sequence relation, be only for
The differentiation for facilitating description to carry out.For the ordinary skill in the art, it can understand that above-mentioned term exists with concrete condition
Concrete meaning in the utility model.At the time of " current " is when executing certain movement, occur multiple current in text, is at any time
Between passage in record in real time.
Based on the mobile non-detectable problem of existing piston rod, the utility model gives oil cylinder displacement detection device.
Product, method etc. will be described in detail by basic engineering, extension design and alternative design below.
The utility model provides a kind of oil cylinder displacement detection device, as shown in Figure 1, including mounting base 5, detection components 3, position
Move component 4；Mounting base 5 is fixedly installed in the cylinder ends of oil cylinder 1, and detection components 3 are installed in mounting base 5, in normal condition
The movable member of lower detection components 3 is connect with displacement component 4, and displacement component 4 is installed on piston rod 2, is examined under abnormal condition
Survey the movable member movement of component 3.
Piston rod 2 is stretched out from the cylinder ends of oil cylinder 1, and the piston rod 2 of stretching anchors object.Mounting base 5 is installed
To cylinder ends, detection components 3 are installed in mounting base 5, so that cylinder body, mounting base 5,3 position of detection components are relatively fixed,
Any displacement will not occur.Displacement component 4 is installed on piston rod 2, once piston rod 2 is mobile, displacement component 4 is moved,
Relative motion occurs for 2 opposing cylinder of piston rod, and with respect to detection components 3 relative motion, movable member and position also occur for displacement component 4
It moves component 4 to connect, when cloud brother occurs for displacement component 4, then movable member then acts, can reacting piston bar 2 according to the movement
It is mobile, and then judge that piston rod 2 is mobile.
Mounting base 5 and mounting base 5 are fixed to there are many fixed forms of cylinder ends, in view of the anchorage effect of oil cylinder 1, surely
Fixed being installed to is most important on oil cylinder 1.A kind of mounting base is given below：As shown in Fig. 2, the mounting base 5 includes the first skewback
51, the second skewback 52, the first skewback 51, the second skewback 52 are in arch bridge shape, and the two is opposite to be installed, and centre, which surrounds, is placed on cylinder body end
The third through-hole 53 in portion, both ends are bolted to connection respectively；First skewback 51, the second skewback 52 middle part to install
Detection components 3.
First skewback 51, the second skewback 52 all use the circular arch of single hole.Opposite installation herein is two arch holes
Aperture is opposite, and to surround the through-hole for being placed on cylinder ends, the aperture of the through-hole of formation and the outer diameter of cylinder ends are identical, promotes to pacify
The dress fixation of seat 5 is trapped among cylinder ends.First skewback 51, the second skewback 52 both ends be provided with bolt hole, bolt passing through bolt hole,
First skewback 51, the second skewback 52 are fixedly connected.Four M12 bolts are used in fig 2, and mounting base 5 is fixed on cylinder
Body end portion.
First skewback 51, the second skewback 52 middle part for installing detection components, therefore, the middle part appearance of the first skewback 51
Face, the second skewback 52 the settable connecting flange 53 of center outer surface, detection components 3 are installed on 53 face of flange.
Multiple embodiments can be given below according to the movement of the mobile judgement piston rod 2 of displacement component 4 in detection components 3
Illustrate detection components 3 and displacement component 4：
Embodiment 1
Detection components 3 include：Limit switch 31 also known as travel switch, as shown in figure 3, limit switch 31 includes switch master
Body 311 and rocker arm 312, one end of rocker arm 312 are articulated with switch main body, and idler wheel 313 is arranged in the other end, when rocker arm 312 and idler wheel
When 313 rotation, switch main body movement.Movable member includes idler wheel 313, and idler wheel 313 is against displacement component 4 in normal state,
Under abnormal condition, idler wheel 313 is detached from displacement component 4, once idler wheel 313 is detached from displacement component 4, then displacement component 4 then can not
Rocker arm 312 is stopped to swing, rocker arm 312 swings starting limig switch 31 and issues stopping signal.Fig. 3-1 gives under normal condition
The state diagram of limit switch；Fig. 3-2 gives the state diagram of the mobile rear limit switch of piston rod.
Limit switch, also known as travel switch, position switch are a kind of common low current master control electrical apparatus.Utilize manufacturing machine
The collision of tool moving component makes its contact action to realize connection or disjunction control circuit, reaches certain control purpose.
Switch main body is installed on 53 face of flange of mounting base 5, the first skewback 51 that switch main body is mounted above in figure
On, it can also be installed on the second skewback 52 of lower section in other embodiments.First skewback 51 or the second skewback 52 are being installed
It is provided on face threaded hole (such as M8 threaded hole), bolt (such as M8 × 80) passes through 53 disk of flange and is fixed on threaded hole.
As shown in Fig. 4 and Fig. 4-1, wherein displacement component 4 includes：Slide block structure 7, slide block structure 7 are tightly placed in piston rod 2
On.Being tightly placed in 2 top shoe structure 7 of piston rod could move synchronously with piston rod 2.
The slide block structure 7 can be ring structure, and intermediate ring set is on piston rod 2, but this design is unfavorable for sliding
The direct disassembly of block, needing to skid off from piston rod 2 could dismantle, once but slide block structure is relatively sliding from piston rod
Dynamic, then it is fixed on the piston rod to be unfavorable for slide block structure, is easy to happen relative motion.Next a kind of tool of slide block structure is provided
Body structure can solve the problems, such as this：
Slide block structure 7 includes：Top shoe 40 and sliding block 41, top shoe 40 and sliding block 41 are in arch bridge shape；The two phase
To installation (or being symmetrically installed using 2 place straight line of piston rod as symmetry axis), middle part surrounds the first through hole for being placed on piston rod 2
45, both ends are bolted to connection respectively.Top shoe 40, sliding block 41 both ends open up threaded hole or location hole respectively, such as
Fruit opens up location hole, this positioning hole installation set 42, and connection bolt passes through two location holes, is fixed to upper sliding block, is fixed
Position, promotes two sliding blocks symmetrical above and below, washer 85 is arranged between the nut and sliding block of bolt, washer is to packing into location hole 43
Row positioning.The set 42 being arranged in location hole can also bear shearing force, avoid sliding block rotate formula dislocation.Top shoe
40, sliding block 41 is mounted together in two opposite modes in aperture, because bolt is fixedly connected, installation and removal are all very square
Just.
Disc spring 44 is cased on bolt.The decrement of disc spring 44 is controlled by adjusting bolt and nut, make displacement component 4 and is lived
There are certain frictional force between stopper rod 2, and can move axially along piston rod 2 under certain external force.
Displacement component 4 is also provided with guide frame, and guide frame is installed on slide block structure 7, with 7 edge of guide shoe structure
The sliding of 2 axial direction of piston rod.The structure, such as guide rod 47, guide rail etc. of various guiding can be used in the present embodiment.
A kind of guide frame is given below：
The guide frame includes：First baffle 48, second baffle 49 and guide rod 47；First baffle 48 is installed on sliding block knot
Structure 7, and it is located at limit switch 31 the same side of piston rod 2；Second baffle 49 is installed on slide block structure 7, and and first baffle
48 positions are opposite；First baffle 48, second baffle 49 are provided with pilot hole 46, and mounting base 5 is fixed in one end of guide rod 47, separately
One end passes through pilot hole 46 (such as Φ 10) and extends, and guide rod 47 is parallel to piston rod 2.Screw thread can be opened up in mounting base 5
Hole (such as M8 threaded hole), guide rod 47 are penetrated to be threadedly coupled in threaded hole and be fixed, and guide rod 47 is parallel with piston rod 2, contraposition
Guiding role is played in the movement for moving component 4, places displacement component 4 and rotates around piston rod 2.
Normal condition bottom roller is resisted against first baffle 48, and first baffle 48 and second baffle 49 can also be with detection groups
The mounting base 5 of part 3 contacts.
Embodiment 2
Detection components 3 include stay wire sensor 32, and stay wire sensor 32 includes sensor main body 321 and bracing wire, bracing wire
One end is fixed on sensor main body 321, and the other end is fixed on displacement component 4, when piston rod 2 is mobile, 321 He of sensor main body
The length of 4 bracing wires of displacement component increases, and measures the length of bracing wire, once the length of bracing wire reaches certain value, then issues shutdown
Signal, stay wire sensor 32 are fixed in mounting base 5.
Stay wire sensor, also known as displacement sensor for pull rope, rope sensor, sensor main body 321 is interior to be arranged drawstring electronics
Ruler, drawstring encoder, obtained in conjunction with angle and straight-line displacement judgement measurement stroke is big, precision is high, stroke is from several hundred millimeters to ten
Several meters are differed.
As shown in figure 5, wherein displacement component 4 includes fixed-block-architecture (FBA) and fixed plate, fixed-block-architecture (FBA) is tightly placed in piston rod 2
End；Fixed-block-architecture (FBA) includes：Upper fixed block 81 and lower fixed block 82, upper fixed block and lower fixed block are in arch bridge shape；Two
The opposite installation of person (or between upper fixed block and lower fixed block with piston rod 2 be that symmetry axis is symmetrical), middle part surrounds tightly
It is placed on the through-hole of piston rod 2, both ends are bolted to connection respectively；Bolt hole is arranged in both ends, and bolt passes through the bolt of the two
The two is fixedly connected by hole.
Fixed plate is installed on fixed-block-architecture (FBA), and the same side of piston rod 2 is located at stay wire sensor 32；Wherein bracing wire is solid
Due in fixed plate, promoting bracing wire to be parallel to piston rod 2.For example fixed plate is provided with the second through-hole 84 (such as 14 through-hole of Φ), with
Fixed bracing wire.
Stay wire sensor 32 is fixed on the second skewback 52 of mounting base 5 in the present embodiment, in other embodiments
It can be set on the first skewback 51.
Embodiment 3：
Such as Fig. 1-7, shown in especially Fig. 6 and 7,2 two kinds of detection components 3 of embodiment 1 and embodiment, displacement component 4 are integrated
In this displacement detector.
The displacement detector, normal condition and failure/abnormal condition.Under normal condition, the first gear of slide block structure 7
Plate 48 (on) and second baffle 49 (under) contacted with 5 end face of mounting base, by real, first baffle 48 (on) and 31 rocker arm of limit switch
Idler wheel 313 on 312 contacts, and guarantees 31 rocker arm 312 of limit switch always in by pressure condition；32 bracing wire of stay wire sensor is long
Degree is a definite value.Under failure/abnormal condition, i.e., when 1 piston rod 2 of oil cylinder is mobile (when stretching), 5 end face of mounting base and cunning
Dynamic structure end face separates, and 31 rocker arm 312 of limit switch restores, and issues signal parking；32 bracing wire length of stay wire sensor,
When length changes to a timing, stay wire sensor 32 issues signal parking.
This technology also provides a kind of tension type oil cylinder 1, installs displacement detector in the tension type oil cylinder 1.
Displacement detector is mounted on tensioning hydro-cylinder 1 in this technique, so that detection is more direct, data are accurate,
Avoid influence caused by other factors.Displacement detector includes that (limit switch 31 and drawstring 322 sense two sets of detection devices
Device), detection signal is respectively switching value and analog quantity, and two sets of detection devices are in parallel, improve the reliability of detection.With piston
The sliding block or fixed-block-architecture (FBA) for the fixed structure of slide block structure 7 and 58 that bar 2 connects are similar, and use material for nylon, both guarantee
Shoe stiffness, and avoid the scuffing to piston rod 2.It is positioned in top shoe 40, sliding block 41 using set, guarantees two
The installation accuracy of sliding block；It connects and disc spring 44 is housed on bolt, the decrement of disc spring 44 is controlled by adjusting nut, to make to slide
Block structure 7 can not only move on piston rod 2, but also have certain frictional force.The bolt of M8 × 80 passes through the of 4 displacement components 4
One baffle 48 (on) and second baffle 49 (under) the hole of Φ 10 be fixedly attached in 3 mounting base 5 of detection components, to sliding block knot
Structure 7 plays guiding role, prevents moving assembly from rotating around 2 axis of piston rod.Displacement detector light structure, operability
By force.
This programme detects 1 piston rod 2 of oil cylinder, when 1 piston rod 2 of oil cylinder moves, detection trigger device, and hair
Signal out keeps equipment out of service, guarantees the safety of equipment operation.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. a kind of oil cylinder displacement detection device, which is characterized in that including mounting base, detection components, displacement component；The mounting base
The cylinder ends of oil cylinder are fixedly installed in, the detection components are installed in the mounting base, in normal state the detection
The movable member of component is connect with the displacement component, and the displacement component is installed on piston rod, described under abnormal condition
The movable member of detection components acts.
2. oil cylinder displacement detection device as described in claim 1, which is characterized in that the mounting base includes the first skewback, the
Two skewbacks, first skewback, second skewback are in arch bridge shape, and the two is opposite to be installed, and centre, which surrounds, is placed on the cylinder body
The through-hole of end, both ends are bolted to connection respectively；
First skewback, second skewback middle part to install the detection components.
3. oil cylinder displacement detection device as described in claim 1, which is characterized in that the detection components include：Limit switch,
The limit switch includes switch main body and rocker arm, and one end of the rocker arm is articulated with the switch main body, other end setting rolling
Wheel, when the rocker arm and idler wheel rotation, switch main body movement；
The switch main body is installed in the mounting base, and the movable member includes the idler wheel, in normal state the rolling
Wheel is against the displacement component, and under abnormal condition, the idler wheel is detached from the displacement component.
4. oil cylinder displacement detection device as claimed in claim 3, which is characterized in that the displacement component includes：Slide block structure,
The slide block structure is tightly placed on the piston rod.
5. oil cylinder displacement detection device as claimed in claim 4, which is characterized in that the displacement component further includes：Guiding knot
Structure, the guide frame are installed on the slide block structure, to guide the slide block structure sliding along the piston rod axial direction
It is dynamic.
6. oil cylinder displacement detection device as claimed in claim 5, which is characterized in that the guide frame includes：First baffle,
Second baffle and guide rod；The first baffle is installed on the slide block structure, and is located at the piston with the limit switch
The same side of bar；The second baffle is installed on slide block structure, and opposite with the first baffle position；
The first baffle, the second baffle are provided with pilot hole, and the mounting base is fixed in one end of the guide rod, separately
One end passes through the pilot hole and extends, and the guide rod is parallel to the piston rod；
The idler wheel is resisted against the first baffle under normal circumstances.
7. such as the described in any item oil cylinder displacement detection devices of claim 4-6, which is characterized in that the slide block structure includes：
Top shoe and sliding block, the top shoe and the sliding block are in arch bridge shape；The two is opposite to be installed, middle part surround be placed on it is described
The first through hole of piston rod, both ends are bolted to connection respectively；
Disc spring is cased on the bolt.
8. oil cylinder displacement detection device as claimed in any one of claims 1 to 6, which is characterized in that the detection components include：
Stay wire sensor, the stay wire sensor include sensor main body and bracing wire, and one end of the bracing wire is fixed on the sensor
Main body, the other end are fixed on the displacement component, when piston rod is mobile, draw between the sensor main body and the displacement component
The length of line increases.
9. oil cylinder displacement detection device as claimed in claim 8, which is characterized in that the displacement component includes fixed-block-architecture (FBA)
And fixed plate, the fixed-block-architecture (FBA) are tightly placed in the end of the piston rod；
The fixed-block-architecture (FBA) includes：Upper fixed block and lower fixed block, the upper fixing block and the lower fixed block are in arch bridge
Shape；The two is opposite to be installed, and middle part surrounds the through-hole for being placed on the piston rod, and both ends are bolted to connection respectively；
The fixed plate is installed on fixed-block-architecture (FBA), and the same side of piston rod is located at the stay wire sensor；
The fixed bracing wire of the fixed plate, the bracing wire are parallel to the piston rod.
10. oil cylinder displacement detection device as claimed in claim 9, which is characterized in that the fixed plate is provided with the second through-hole, with
The fixed bracing wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721570947.1U CN208106882U (en) | 2017-11-22 | 2017-11-22 | Oil cylinder displacement detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721570947.1U CN208106882U (en) | 2017-11-22 | 2017-11-22 | Oil cylinder displacement detection device |
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| CN208106882U true CN208106882U (en) | 2018-11-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107781257A (en) * | 2017-11-22 | 2018-03-09 | 北京起重运输机械设计研究院 | Oil cylinder displacement detection device |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107781257A (en) * | 2017-11-22 | 2018-03-09 | 北京起重运输机械设计研究院 | Oil cylinder displacement detection device |
| CN107781257B (en) * | 2017-11-22 | 2023-06-20 | 北京起重运输机械设计研究院有限公司 | Oil cylinder displacement detection device |
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Address after: 100007 No. 52, Lama Temple Avenue, Beijing, Dongcheng District Patentee after: BEIJING MATERIALS HANDLING RESEARCH INSTITUTE Co.,Ltd. Address before: 100007 No. 52, Lama Temple Avenue, Beijing, Dongcheng District Patentee before: BEIJING MATERIALS HANDLING Research Institute |