CN108544422A - Novel hydraulic power-assisted pin pulling out device - Google Patents
Novel hydraulic power-assisted pin pulling out device Download PDFInfo
- Publication number
- CN108544422A CN108544422A CN201810414034.3A CN201810414034A CN108544422A CN 108544422 A CN108544422 A CN 108544422A CN 201810414034 A CN201810414034 A CN 201810414034A CN 108544422 A CN108544422 A CN 108544422A
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- pin
- cylinder
- power
- stroke
- oil
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
Abstract
A kind of novel hydraulic power-assisted pin pulling out device is related to a kind of novel shaft end limit opening pin pulling attachment based on hydraulic drive power-assisted.The invention device is used to solve current pin removal and is unable to the deficiency that high-efficiency and continuous extracts shaft end limit split pin.The technical solution adopted in the present invention is to be combined Hydraulic Power Transmission System with pin pulling clamp, increases a set of hydraulic drive force aid system, including power cylinder, beam pin stroke cylinder, power cylinder of pulling pin on mechanical shear pincers.The end that mechanical shear pincers are withstood to opening axis pin pulls handle that power amplification is transmitted to the piston of power cylinder；Piston motion pushes hydraulic oil injection to load smaller beam pin stroke cylinder, and drive, which collects to split corner member the opening of split pin is split angle, to be reduced；When beam pin stroke cylinder reaches defined position, the larger power cylinder injection of pulling pin of fluid steering load drives sharp nozzle member linear motion of pulling pin, extracts direction along pin and extract split pin.The invention device can effectively improve operating efficiency of pulling pin, and not increase additional energy.
Description
Technical field
The present invention relates to a kind of devices for mechanical shaft end limit split pin of choosing, and hydraulic drive is based on more particularly, to one kind
The novel shaft end limit opening pin pulling attachment of power-assisted.
Background technology
It generally uses split pin to limit installation part in the assembly of operating machinery, prevents part from falling off and cause thing
Therefore.When carrying out maintaining to machinery, needs first to remove split pin, then can just remove part.But general operating machinery exists
Outdoor study can make split pin be difficult to extract from pin hole due to the influence of corrosion and dirt.The daily of split pin at present moves back
Pin method is usually first to be minimized the angle of splitting of split pin with beam pin device, then hook is drawn in the hole of insertion opening pin, uses hand hammer
Hammering hook leads to split pin and exits completely.In whole process, tool that is various and using is more the step of operation, and consumption is more
Manpower and materials, reduce the efficiency of machine tending purposes.Thus it is badly in need of a kind of pulling out for Labor-saving high-efficiency in machinery industry on-site maintenance
Pin assembly.
Existing some scholars are in the device for studying split pin of choosing at present.As Patent No. CN107398860A proposes one kind
It is less efficient although can be pulled pin with reinforcement based on screw pair pin pulling out device；Patent No. CN107351021A proposes that one kind is based on
The pin removal of percussion hammer loop bar is pulled pin using the impulse force of percussion hammer, but is difficult to control strength of pulling pin, and is not easy to operate.And river bank vehicle
A kind of hydraulic pin remover is researched and developed in education room, is to be connected hydraulic pin remover and high-pressure oil pump trolley according to hydraulic ejecting picks principle
It connects, drives pin removal gib head to pull out split pin using high pressure oil, split pin is split bicker degree and collected by pin trepanning extruding.The device
It needs to connect high-pressure oil pump, use is more inconvenient, and pin trepanning extruding is in addition leaned on to collect pin tail, can make energy consumption increase of pulling pin, simultaneously
Split pin can be caused to be broken.In view of defect existing for current pin pulling out device, designing a kind of novel labour saving pin pulling out device has very
Important engineering significance.
Invention content
The object of the present invention is to provide a kind of novel hydraulic power-assisted pin pulling out device, solve current pin removal and are unable to high-efficiency and continuous
Extract the deficiency of shaft end limit split pin.The device reasonable design, it is of low cost, it is easy to use, it can effectively improve work of pulling pin
Industry efficiency, while not increasing additional energy.
The technical solution adopted in the present invention is to be combined Hydraulic Power Transmission System with pin pulling clamp, on mechanical shear pincers 1
Increase a set of hydraulic drive force aid system, including power cylinder 2, beam pin stroke cylinder 3, power cylinder 4 of pulling pin.
The mechanical shear is clamped by mobile jib 1-1, handle 1-2, two linkage 1-3, oil circuit 1-4, axis hole locating slot 1-5 groups
At；Wherein two linkage 1-3 are mounted on handle 1-2, and one end connects handle one end and connects power the cylinder piston 2-1, to band
Hydraulic drive is realized in dynamic power the cylinder piston 2-1 movements；Oil circuit 1-4 is fixed by the fluting on mobile jib, realizes the transmission of hydraulic oil；
Axis hole locating slot 1-5 is fixed on the heads mobile jib 1-1, the shaft end for pin pulling out device to be fixed on to split pin installation axle, convenient for pulling out
Pin.
The power cylinder is fixed on mobile jib 1-1, is mainly made of power the cylinder piston 2-1 and power cylinder oil cylinder 2-2；It is dynamic
It links with two linkage 1-3 one end of power the cylinder piston 2-1；Power cylinder oil cylinder 2-2 is connected and fixed with mobile jib 1-1.
The beam pin stroke cylinder is fixed on mobile jib 1-1 cephalic pars side, mainly by stroke the cylinder piston 3-1, stroke cylinder oil
Cylinder 3-2, stroke cylinder piston cover 3-3, it collects and splits corner member 3-4 and limiting device 3-5 compositions；Stroke cylinder oil cylinder 3-2, which is fixed, to be connected
Mobile jib 1-1 is met, and has opening to be connected with oil circuit 1-4 on oil cylinder, hydraulic oil is enable to flow into stroke cylinder oil cylinder 3-2；Stroke cylinder
Piston 3-1 coordinates with stroke cylinder oil cylinder 3-2, can relative motion under the action of hydraulic oil；Simultaneously to the company of stroke the cylinder piston 3-1
Bar is improved, and is increased limiting device 3-5 and is limited stroke；Stroke cylinder piston cover 3-3 is fixed on stroke the cylinder piston 3-1 with pin
On, for realizing the transmission of stroke the cylinder piston 3-1 movements；Corner member is split by being fixed on collecting on stroke cylinder piston cover 3-3
3-4, the opening for reasonably collecting split pin lower end split angle, make the extraction in split pin.
The power cylinder of pulling pin is fixed on the mobile jib 1-1 cephalic pars other side, mainly by reinforcement the cylinder piston 4-1, power cylinder
Oil cylinder 4-2, power cylinder piston cover 4-3 and sharp mouth hook 4-4 compositions of pulling pin；Power cylinder oil cylinder 4-2 is fixedly connected with mobile jib 1-1,
And there is opening to be connected with oil circuit 1-4 on oil cylinder, so that hydraulic oil is flowed into power cylinder oil cylinder 4-2；Reinforcement the cylinder piston 4-1 and increasing
The 4-2 cooperations of power cylinder oil cylinder, can relative motion under the action of hydraulic oil；Power cylinder piston cover 4-3 is fixed on pin in reinforcement
On the cylinder piston 4-1, for realizing the transmission of reinforcement the cylinder piston 4-1 movements；The sharp mouth hook 4-4 that pulls pin is fixed on power cylinder piston cover
On 4-3, the vertical and straight movement for the sharp mouth hook 4-4 that pulls pin is driven to carry out choosing for split pin by the movement of reinforcement the cylinder piston 4-1.
Compared with prior art, the beneficial effects of the invention are as follows：
（1）Single single step may be implemented to choose to shaft end limit pin, improve traditional more people's substep operating types；
（2）The present invention with the maximum of the prior art the difference is that compared with traditional pin pulling tool, speed of pulling pin and effect of pulling pin
Rate is greatly improved, high-effective and labour-saving；
（3）By being rationally designed accordingly to hydraulic cylinder, power can reasonably be amplified, accomplishes that split pin splits angle and collects and open
Two stable actions linking of choosing of mouthful pin, and the direction for the applied force that ensures to pull pin and pin extraction direction are coaxial, and reduction is pulled pin
The loss of power；
（4）During using the device, the power of hydraulic system transfers is controllable and steady, can guarantee split pin not by excessive
Power of pulling pin is damaged.
Description of the drawings
Fig. 1 is the novel hydraulic power-assisted pin pulling out device of the present invention.
Fig. 2 is the mechanical shear pincers of the novel hydraulic power-assisted pin pulling out device of the present invention.
Fig. 3 is the power cylinder of the novel hydraulic power-assisted pin pulling out device of the present invention.
Fig. 4 is the beam pin stroke cylinder of the novel hydraulic power-assisted pin pulling out device of the present invention.
Fig. 5 is the power cylinder of pulling pin of the novel hydraulic power-assisted pin pulling out device of the present invention.
Reference numeral：1 clamps for mechanical shear；1-1 is mobile jib；1-2 is handle；1-3 is two linkages；1-4 is oil circuit；1-
5 axis hole locating slots；2 be power cylinder；2-1 is power the cylinder piston, 2-2 is power cylinder oil cylinder；3 be beam pin stroke cylinder；3-1 is stroke
The cylinder piston；3-2 is stroke cylinder oil cylinder；3-3 is stroke cylinder piston cover；3-4 is to collect to split corner member；3-5 is limiting device；4 are
It pulls pin power cylinder；4-1 is reinforcement the cylinder piston；4-2 is power cylinder oil cylinder；4-3 is power cylinder piston cover；4-4 is sharp mouth hook of pulling pin
Part.
Specific implementation mode
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments：
As shown in Fig. 1, it is the novel hydraulic power-assisted pin pulling out device of the present invention, journey is sold by mechanical shear pincers 1, power cylinder 2, beam
Cylinder 3, power cylinder 4 of pulling pin composition；Power cylinder 2, beam pin stroke cylinder 3 and power cylinder 4 of pulling pin all are fixed on mechanical shear pincers 1
On；The hydraulic oil of output with pressure under the action of mechanical shear pincers 1 of power cylinder 2, and beam is transported to by oil circuit and sells journey
In cylinder 3 and power cylinder 4 of pulling pin, to the active force for generating beam pin He pulling pin, function of pulling pin is realized.
As shown in Fig. 2, it is the mechanical shear pincers 1 of the present invention, by mobile jib 1-1, handle 1-2, two linkage 1-3, oil circuit
1-4, axis hole locating slot 1-5 compositions；Wherein two linkage 1-3 are mounted on handle 1-2, and it is dynamic that one end connects the connection of handle one end
Power the cylinder piston 2-1, to drive power the cylinder piston 2-1 movements to realize hydraulic drive；Oil circuit 1-4 is solid by the fluting on mobile jib
It is fixed, realize the transmission of hydraulic oil；Axis hole locating slot 1-5 is fixed on the heads mobile jib 1-1, for pin pulling out device to be fixed on split pin
The shaft end of installation axle, convenient for pulling pin.
As shown in Fig. 3, it is the power cylinder 2 of the present invention, is fixed on mobile jib 1-1, mainly by power the cylinder piston 2-1 and dynamic
Power cylinder oil cylinder 2-2 compositions；It links with two linkage 1-3 one end of power the cylinder piston 2-1.
As shown in Fig. 4, it is the beam pin stroke cylinder 3 of the present invention, mobile jib 1-1 cephalic pars side is fixed on, mainly by stroke
The cylinder piston 3-1, it stroke cylinder oil cylinder 3-2, stroke cylinder piston cover 3-3, collects and splits corner member 3-4 and limiting device 3-5 compositions；Row
Journey cylinder oil cylinder 3-2 is fixedly connected with mobile jib 1-1, and has opening to be connected with oil circuit 1-4 on oil cylinder, and hydraulic oil is enable to flow into stroke cylinder
In oil cylinder 3-2；Stroke the cylinder piston 3-1 coordinates with stroke cylinder oil cylinder 3-2, can relative motion under the action of hydraulic oil；It is right simultaneously
The connecting rod of stroke the cylinder piston 3-1 is improved, and is increased limiting device 3-5 and is limited stroke；Stroke cylinder piston cover 3-3 is fixed with pin
On stroke the cylinder piston 3-1, for realizing the transmission of stroke the cylinder piston 3-1 movements；By being fixed on stroke cylinder piston cover 3-3
Collect and split corner member 3-4, the opening for reasonably collecting split pin lower end splits angle, makes the extraction in split pin.
As shown in Fig. 5, it is the power cylinder 4 of pulling pin of the present invention, the mobile jib 1-1 cephalic pars other side is fixed on, mainly by increasing
Power the cylinder piston 4-1, power cylinder oil cylinder 4-2, power cylinder piston cover 4-3 and sharp mouth hook 4-4 compositions of pulling pin；Power cylinder oil cylinder 4-
2 are fixedly connected with mobile jib 1-1, and have opening to be connected with oil circuit 1-4 on oil cylinder, and hydraulic oil is enable to flow into power cylinder oil cylinder 4-2；
Reinforcement the cylinder piston 4-1 coordinates with power cylinder oil cylinder 4-2, can relative motion under the action of hydraulic oil；Power cylinder piston cover 4-3 is used
Pin is fixed on reinforcement the cylinder piston 4-1, for realizing the transmission of reinforcement the cylinder piston 4-1 movements；The sharp mouth hook 4-4 that pulls pin is solid
It is scheduled on power cylinder piston cover 4-3, drives the vertical and straight movement for the sharp mouth hook 4-4 that pulls pin to carry out by the movement of reinforcement the cylinder piston 4-1
Split pin is chosen.
The operation principle of 1 ~ 5 the present invention will be described in detail novel hydraulic power-assisted pin pulling out device below in conjunction with the accompanying drawings.
Before the shaft end split pin of mechanical structure is chosen, by 1-5 pairs of the axis hole locating slot of apparatus of the present invention mechanical shear pincers 1
Standard is withstood on limit opening axis pin end, and the sharp mouth hook 4-4 that will pull pin is hooked in the hole of split pin, and will be collected and be split corner member 3-
4 are placed in split pin opening, and operating personnel check whether measure hydraulic fluid flow paths 1-4 normal.When starting to pull pin, machinery is held
Handle 1-2 is pressed to the directions mobile jib 1-1, two linkage 1- is driven during pressing by the mobile jib 1-1 and handle 1-2 of shearing pincers 1
3 and power the cylinder piston 2-1 is moved, to make hydraulic oil generate pressure.Hydraulic oil is first smaller to load pressure by oil circuit 1-4
3 oiling of beam pin stroke cylinder pushes stroke the cylinder piston 3-1 and stroke cylinder piston cover 3-3 to move downward, and then drives to collect and split angle structure
Part 3-4, which is moved downward, to be made to split angle reduction and splits angle and be reduced to desired value until reach defined position.Since limiting device 3-5 is limited
The effect of stroke, oil circuit 1-4 continue oiling without normal direction beam pin stroke cylinder 3, turn to 4 oiling of power cylinder of pulling pin, are lived by power cylinder
Plug 4-1 drives sharp mouth hook 4-4 linear motions of pulling pin, and generating larger power of choosing in pin extraction direction extracts split pin.
The novel hydraulic power-assisted pin pulling out device of the present invention has reliable oil circuit leakproofness, suitable force increasing ratio and row
Journey, main screw lift is lighter, operates with simplicity, process of pulling pin quick and convenient, safe and reliable.
The present invention is described in detail above, its object is to allow the personage for being familiar with this field technology that can understand this
The content of invention is simultaneously implemented, and it is not intended to limit the scope of the present invention, and the present invention is not limited to above-mentioned implementations
, equivalent change or modification made by all Spirit Essences according to the present invention should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of novel hydraulic power-assisted pin pulling out device, it is characterised in that：It is clamped by mechanical shear（1）, power cylinder（2）, beam sell journey
Cylinder（3）And power cylinder of pulling pin（4）Four parts form；
The mechanical shear is clamped by mobile jib（1-1）, handle（1-2）, two linkages（1-3）, oil circuit（1-4）, axis hole locating slot
（1-5）Composition；Wherein two linkages（1-3）Mounted on handle（1-2）On, one end connects handle one end and connects power the cylinder piston
（2-1）, to drive power the cylinder piston（2-1）Hydraulic drive is realized in movement；Oil circuit（1-4）It is fixed by the fluting on mobile jib,
Realize the transmission of hydraulic oil；Axis hole locating slot（1-5）It is fixed on mobile jib（1-1）Head, for pin pulling out device to be fixed on opening
The shaft end for selling installation axle, convenient for pulling pin；
The power cylinder is fixed on mobile jib（1-1）On, mainly by power the cylinder piston（2-1）With power cylinder oil cylinder（2-2）Composition；
Power the cylinder piston（2-1）One end and two linkages（1-3）Linkage；Power cylinder oil cylinder（2-2）With mobile jib（1-1）It is connected and fixed；
The beam pin stroke cylinder is fixed on mobile jib（1-1）Cephalic par side, mainly by stroke the cylinder piston（3-1）, stroke cylinder oil
Cylinder（3-2）, stroke cylinder piston cover（3-3）, collect and split corner member（3-4）And limiting device（3-5）Composition；Stroke cylinder oil cylinder
（3-2）It is fixedly connected with mobile jib（1-1）, and have opening and oil circuit on oil cylinder（1-4）It is connected, hydraulic oil is enable to flow into stroke cylinder oil
Cylinder（3-2）In；Stroke the cylinder piston（3-1）With stroke cylinder oil cylinder（3-2）Cooperation, can relative motion under the action of hydraulic oil；Together
When to stroke the cylinder piston（3-1）Connecting rod be improved, increase limiting device（3-5）Limit stroke；Stroke cylinder piston cover（3-3）
It is fixed on stroke the cylinder piston with pin（3-1）On, for realizing stroke the cylinder piston（3-1）The transmission of movement；It is expert at by fixation
Journey the cylinder piston cover（3-3）On collect and split corner member（3-4）, the opening for reasonably collecting split pin lower end splits angle, makes in opening
The extraction of pin；
The power cylinder of pulling pin is fixed on mobile jib（1-1）The cephalic par other side, mainly by reinforcement the cylinder piston（4-1）, power cylinder
Oil cylinder（4-2）, power cylinder piston cover（4-3）And sharp mouth hook of pulling pin（4-4）Composition；Power cylinder oil cylinder（4-2）It is fixedly connected
Mobile jib（1-1）, and have opening and oil circuit on oil cylinder（1-4）It is connected, hydraulic oil is enable to flow into power cylinder oil cylinder（4-2）In；Increase
Power the cylinder piston（4-1）With power cylinder oil cylinder（4-2）Cooperation, can relative motion under the action of hydraulic oil；Power cylinder piston cover（4-
3）It is fixed in reinforcement the cylinder piston with pin（4-1）On, for realizing reinforcement the cylinder piston（4-1）The transmission of movement；It pulls pin sharp mouth
Hook（4-4）It is fixed on power cylinder piston cover（4-3）On, by reinforcement the cylinder piston（4-1）Movement drive pull pin sharp mouth hook（4-
4）Vertical and straight movement carry out split pin and choose.
2. a kind of novel hydraulic power-assisted pin pulling out device according to claim 1, it is characterised in that：The beam pin stroke cylinder
（3）Cylinder diameter is than beam pin stroke cylinder（3）Want small, and the resistance of beam pin is also smaller, thus power cylinder（2）Hydraulic oil can first inject and pull out
Sell power cylinder（4）In, drive, which collects, splits corner member（3-4）Movement makes split pin split angle reduction, makes in pulling pin.
3. a kind of novel hydraulic power-assisted pin pulling out device according to claim 1, it is characterised in that：The mechanical shear pincers
（1）Due to handle（1-2）Lever design, it can be achieved that level-one reinforcement effect, power cylinder of in addition pulling pin（4）Cylinder diameter than power
Cylinder（2）Greatly, to realize secondary reinforcement effect by hydraulic drive, it can effectively improve the light of operation of pulling pin by two-stage reinforcement
Just property improves efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414034.3A CN108544422B (en) | 2018-05-03 | 2018-05-03 | Hydraulic power-assisted pin pulling device and pin pulling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414034.3A CN108544422B (en) | 2018-05-03 | 2018-05-03 | Hydraulic power-assisted pin pulling device and pin pulling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108544422A true CN108544422A (en) | 2018-09-18 |
| CN108544422B CN108544422B (en) | 2023-09-19 |
Family
ID=63513421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810414034.3A Active CN108544422B (en) | 2018-05-03 | 2018-05-03 | Hydraulic power-assisted pin pulling device and pin pulling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108544422B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1336938A (en) * | 1919-10-22 | 1920-04-13 | William E Aylor | Cotter-extractor |
| GB149140A (en) * | 1919-09-03 | 1920-08-12 | Thomas Speers | A device for withdrawing split pins |
| CN201267979Y (en) * | 2008-09-11 | 2009-07-08 | 宝山钢铁股份有限公司 | Retainer pin detaching device |
| CN201856224U (en) * | 2010-10-31 | 2011-06-08 | 河南省电力公司洛阳供电公司 | Device for taking out cotter pin |
| CN104290074A (en) * | 2014-09-02 | 2015-01-21 | 国网安徽省电力公司阜阳供电公司 | Cotter pulling tool |
| CN205057466U (en) * | 2015-10-20 | 2016-03-02 | 眉山恒升机械装备有限公司 | Split pin extrusion extracting tool |
| CN107351021A (en) * | 2017-06-26 | 2017-11-17 | 中船动力有限公司 | Pin removal and method of pulling pin |
| CN206662669U (en) * | 2017-03-14 | 2017-11-24 | 上海铁路局南京东车辆段 | Goods train vehicle bogie split pin demountor |
| CN208358688U (en) * | 2018-05-03 | 2019-01-11 | 华东交通大学 | A kind of pin pulling out device based on hydraulic drive power-assisted |
| CN216830691U (en) * | 2021-12-30 | 2022-06-28 | 郑州铁总智能科技有限公司 | Electric flat pin clamp |
-
2018
- 2018-05-03 CN CN201810414034.3A patent/CN108544422B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB149140A (en) * | 1919-09-03 | 1920-08-12 | Thomas Speers | A device for withdrawing split pins |
| US1336938A (en) * | 1919-10-22 | 1920-04-13 | William E Aylor | Cotter-extractor |
| CN201267979Y (en) * | 2008-09-11 | 2009-07-08 | 宝山钢铁股份有限公司 | Retainer pin detaching device |
| CN201856224U (en) * | 2010-10-31 | 2011-06-08 | 河南省电力公司洛阳供电公司 | Device for taking out cotter pin |
| CN104290074A (en) * | 2014-09-02 | 2015-01-21 | 国网安徽省电力公司阜阳供电公司 | Cotter pulling tool |
| CN205057466U (en) * | 2015-10-20 | 2016-03-02 | 眉山恒升机械装备有限公司 | Split pin extrusion extracting tool |
| CN206662669U (en) * | 2017-03-14 | 2017-11-24 | 上海铁路局南京东车辆段 | Goods train vehicle bogie split pin demountor |
| CN107351021A (en) * | 2017-06-26 | 2017-11-17 | 中船动力有限公司 | Pin removal and method of pulling pin |
| CN208358688U (en) * | 2018-05-03 | 2019-01-11 | 华东交通大学 | A kind of pin pulling out device based on hydraulic drive power-assisted |
| CN216830691U (en) * | 2021-12-30 | 2022-06-28 | 郑州铁总智能科技有限公司 | Electric flat pin clamp |
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| Publication number | Publication date |
|---|---|
| CN108544422B (en) | 2023-09-19 |
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