CN108555825A - Pin extracting apparatus - Google Patents
Pin extracting apparatus Download PDFInfo
- Publication number
- CN108555825A CN108555825A CN201810635473.7A CN201810635473A CN108555825A CN 108555825 A CN108555825 A CN 108555825A CN 201810635473 A CN201810635473 A CN 201810635473A CN 108555825 A CN108555825 A CN 108555825A
- Authority
- CN
- China
- Prior art keywords
- bearing plate
- pin
- lead screw
- screw
- lower bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 238000000605 extraction Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- 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
- B25B27/023—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 using screws
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The invention discloses a kind of pin extracting apparatus, including lead screw and for top pressure unit with the top pull mechanism of drawing lead screw, lead screw one end is fixed in pin, and the other end passes through top pull mechanism screw-thread fit to have nut, nut to compress top pull mechanism.The pin extracting apparatus has many advantages, such as simple in structure, time saving and energy saving, prevents lead screw damage, operation and easy to adjust and extraction effect good and efficient.
Description
Technical field
The present invention relates to a kind of puller more particularly to a kind of pin extracting apparatus, belong to service kit technical field.
Background technology
In the industry of power station, unit maintenance needs for some to be inserted in pin extraction bigger in unit, and pin
The problems such as position humidity is bigger and pin material itself, stress, pin are extracted relatively difficult, laborious, time-consuming.
Now traditional pin method for pulling out is mainly two kinds：A kind of work being utilized in suit impact head in one end on lead screw
Tool, the other end are fixed in pin, then continuously wrench impact head in the axis direction of lead screw, hit silk by impact head
Impact force caused by the bolt head of bar, pin is extracted.Two kinds be directly tapped by the way of beaing come.Make
When with first method, not only arduously, it is time-consuming, but also lead screw be easily bent, be broken even internal thread pin nail puller do not come out；It uses
Second method be easy to cause the deformation and damage of pin.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of simple in structure, time saving and energy saving,
Prevent lead screw damage, operation and pin extracting apparatus easy to adjust and that extraction effect is good and efficient.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of pin extracting apparatus, including lead screw and for top pressure unit with the top pull mechanism of lead screw described in drawing, the lead screw
One end is fixed in pin, and the other end passes through top pull mechanism screw-thread fit to have nut, the nut to compress the top pull mechanism.
As a further improvement of the above technical scheme：
Top pull mechanism includes upper bearing plate, hydraulicefficiency elevation structure and the lower bearing plate for top pressure unit, the hydraulic elevator
Structure bottom end and top are affixed with the lower bearing plate and the upper bearing plate respectively, and the upper bearing plate is offered for the silk
The centre bore that bar passes through, the lower bearing plate offer the pin for extraction by center port, the nut compresses institute
State bearing plate.
The hydraulicefficiency elevation structure includes pipeline, hydraulic pump and two using the lead screw as the symmetrically arranged hydraulic pressure of symmetry axis
Jack, the bottom end and top of the hydraulic jack are respectively and fixedly connected in the lower bearing plate and the upper bearing plate, two institutes
Hydraulic jack is stated by the pipeline connection in the hydraulic pump.
The bottom end of the lower bearing plate is equipped with lift adjustment component on the position relative to two hydraulic jacks,
Distinguish top pressure unit in the one end of two lift adjustment components far from the lower bearing plate.
The lift adjustment component includes threaded post and screw shell, and described threaded post one end is fixed in the lower pressure-bearing
Plate, the other end are inserted in the screw shell, one end top of the screw shell far from the lower bearing plate with thread fiting mode
Press group.
The bottom end of the lower bearing plate on the position of two hydraulic jacks relative to being connected with screw thread sleeve column, institute
Threaded post is stated by cooperatively forming detachable connection with the thread bush male screw.
Threaded interior hole is offered on pin, the lead screw with the threaded interior hole screw-thread fit by being fixed in pin.
Fixing nut is connected on pin, the lead screw with the fixing nut screw-thread fit by being fixed in pin.
Compared with the prior art, the advantages of the present invention are as follows：
Inventive pin nail extracting apparatus include lead screw and for top pressure unit with the top pull mechanism of drawing lead screw, lead screw one end is affixed
In pin, the other end passes through top pull mechanism screw-thread fit to have nut, nut to compress top pull mechanism.This pin extracting apparatus passes through top
Drawing mechanism drawing lead screw is in a manner of extracting pin, simple in structure, time saving and energy saving；Top pull mechanism continuous applying force is kept away in lead screw
Exempted from lead screw be hit power effect and generate bending, fracture thus damage lead screw；While top pull mechanism top pull lead screw, lead screw
It is good and efficient to extract effect under the action of continuous uniform exerts a force drawing for continuous applying force drawing pin, pin；Lead screw can pass through
The relative position of nut adjustment lead screw and top pull mechanism is extremely conducive to the position that lead screw extracts pin, operate and easy to adjust.
Description of the drawings
Fig. 1 is the structural schematic diagram of inventive pin nail extracting apparatus（Without fixing nut on pin）.
Fig. 2 is the structural schematic diagram of inventive pin nail extracting apparatus（There is fixing nut on pin）.
Fig. 3 is the structural schematic diagram of hydraulicefficiency elevation structure in inventive pin nail extracting apparatus.
Each label indicates in figure：
1, lead screw；2, top pull mechanism；21, upper bearing plate；211, centre bore；22, hydraulicefficiency elevation structure；221, hydraulic jack；
222, pipeline；223, hydraulic pump；23, lower bearing plate；231, center port；232, lift adjustment component；2321, threaded post；
2322, screw shell；233, screw thread sleeve column；3, unit；4, nut；5, pin；51, threaded interior hole；52, fixing nut.
Specific implementation mode
The present invention is described in further details below with reference to Figure of description and specific embodiment.
Fig. 1 to Fig. 3 shows the pin extracting apparatus of the present embodiment, including lead screw 1 and for top pressure unit 3 with drawing silk
The top pull mechanism 2 of bar 1,1 one end of lead screw are fixed in pin 5, and the other end passes through 2 screw-thread fit of top pull mechanism to have nut 4, nut 4
Compress top pull mechanism 2.In the structure, 2 drawing lead screw 1 of top pull mechanism in a manner of extracting pin 5, simple in structure, province
Shi Shengli；2 continuous applying force of top pull mechanism in lead screw 1, avoid lead screw 1 be hit power effect and generate bending, fracture so that
Damage lead screw 1；While 2 top pull lead screw 1 of top pull mechanism, 1 continuous applying force drawing pin 5 of lead screw, pin 5 exerts a force in continuous uniform
Under the action of drawing, it is good and efficient to extract effect；Lead screw 1 can adjust the relative position of lead screw and top pull mechanism by nut 4
To the position for being conducive to the extraction pin 5 of lead screw 1, operates and easy to adjust, washer can be set between nut 4 and top pull mechanism 2 and be used for
Ensure top pull mechanism 2 in the process of running can pushing tow nut 4 come drive lead screw 1 far from unit 3 be axially moved so that lead screw
1 draws out pin 5, in order to preferably protect lead screw 1, on lead screw 1 can screw-thread fit 2 or more nuts 4 are set.
In the present embodiment, top pull mechanism 2 is including upper bearing plate 21, hydraulicefficiency elevation structure 22 and under top pressure unit 3
Bearing plate 23,22 bottom end of hydraulicefficiency elevation structure and top are affixed with lower bearing plate 23 and upper bearing plate 21 respectively, upper bearing plate 21
Offer the centre bore 211 passed through for lead screw 1, lower bearing plate 23 offer the pin 5 for extraction by center port
231, nut 4 compresses upper bearing plate 21.In the structure, top pull mechanism 2 include upper bearing plate 21, hydraulicefficiency elevation structure 22 and under
Bearing plate 23,22 bottom end of hydraulicefficiency elevation structure are welded in lower bearing plate 23, and the top of hydraulicefficiency elevation structure 22 is welded in pressure-bearing
Plate 21,211 diameter of centre bore on upper bearing plate 21 are more than the diameter of lead screw 1, but less than the outer diameter of nut 4, lower bearing plate 23
Center port 231 diameter be more than pin 5 maximum gauge, the pin 5 for extraction passes through, in use, lead screw 1 is fixed on
On pin 5, lead screw 1 is inserted in top pull mechanism 2, and lead screw 1 sequentially passes through on the center port 231 and upper bearing plate 21 of lower bearing plate 23
Centre bore 211 be fitted into nut 4 with respect to another end cap of pin 5 in lead screw 1 until lower bearing plate 23 is pressed on unit 3, until
Nut 4 is pressed on bearing plate 21, after completing equipment, starts hydraulicefficiency elevation structure 22, the bottom end of hydraulicefficiency elevation structure 22 is pressed on down
The top of bearing plate 23, hydraulicefficiency elevation structure 22 pushes upper bearing plate 21 up to move, meanwhile, upper bearing plate 21 pushes nut 4
It up moves, nut 4 drives lead screw 1 up to move, and lead screw 1 drives pin 5 to extract in unit 3, and top pull mechanism 2 is using in carrying
The 23 top pressure unit 3 of lower bearing plate of heart port 231 is cheaper than the levelling of top pull mechanism 2 and force.
In the present embodiment, hydraulicefficiency elevation structure 22 is including pipeline 222, hydraulic pump 223 and two with lead screw 1 for symmetry axis pair
Claim the hydraulic jack 221 of setting, the bottom end and top of hydraulic jack 221 are respectively and fixedly connected in lower bearing plate 23 and upper bearing plate
21, two hydraulic jacks 221 are communicated in hydraulic pump 223 by pipeline 222.In the structure, hydraulicefficiency elevation structure 22 includes
Pipeline 222, hydraulic pump 223 and two hydraulic jacks 221, the bottom end of two hydraulic jacks 221 are welded in lower bearing plate
23, the top of two hydraulic jacks 221 is welded in bearing plate 21, and two hydraulic jacks 221 are symmetry axis with lead screw 1
It is symmetrical arranged, two hydraulic jacks 221 are driven simultaneously by hydraulic pump 223 or braking, two hydraulic jacks 221 of realization
It moves synchronously, ensures that the upper bearing plate 21 in two hydraulic jacks 221 is steadily moved along the axial direction of lead screw 1, so that
It is steady that nut 4, nut 4 is pushed steadily lead screw 1 to be driven steadily to draw out pin 5 along the axial direction of lead screw 1, further prevented
Lead screw 1 makes lead screw 1 bend and/or be broken during the drawing process, since stress is inconsistent and the variation of drawing direction,
And prevent from causing the deformation and damage of pin 5.
In the present embodiment, the bottom end of lower bearing plate 23 is equipped with lifting on the position relative to two hydraulic jacks 221
Adjust component 232, one end difference top pressure unit 3 of two lift adjustment components 232 far from lower bearing plate 23.In the structure, two
A lift adjustment component 232 is fixed in the bottom end of lower bearing plate 23, two liftings corresponding to the position of two hydraulic jacks 221
Component 232 is adjusted also with lead screw 1 for symmetrical axial symmetry, two lift adjustment components 232 can move up and down respectively, that is, work as unit
3 contacted with two lift adjustment components 232 face out-of-flatness when, some lift adjustment component 232 can be adjusted thus keep on
Bearing plate 21 ensures that lead screw 1 is axially moveable during drawing perpendicular to lead screw 1, can be adjusted separately using this two
Lift adjustment component 232 makes pin extracting apparatus can adapt in 3 end face of unit of out-of-flatness.
In the present embodiment, lift adjustment component 232 includes threaded post 2321 and screw shell 2322,2321 one end of threaded post
It is fixed in lower bearing plate 23, the other end is inserted in screw shell 2322 with thread fiting mode, and screw shell 2322 is far from lower pressure-bearing
One end top pressure unit 3 of plate 23.In the structure, lift adjustment component 232 includes threaded post 2321 and screw shell 2322, is made
With in the process, lift adjustment component 232 can adjust the depth of parallelism of upper bearing plate 21 by rotating screw shell 2322, so that protecting
Bearing plate 21 is held perpendicular to lead screw 1 to ensure that lead screw 1 is axially moveable during drawing, using rotation screw shell
2322 mode to adjust, it is easy to operate.
In the present embodiment, the bottom end of lower bearing plate 23 is connected with spiral shell on the position relative to two hydraulic jacks 221
Line sleeve column 233, threaded post 2321 with 233 screw-thread fit of screw thread sleeve column by forming detachable connection.In the structure, thread bush
Column 233 is welded in the bottom end of lower bearing plate 23, lift adjustment component 232 by threaded post 2321 by with the spiral shell on lower bearing plate 23
233 screw-thread fit of line sleeve column forms detachable connection, when the end face of unit 3 is smooth, dismountable lift adjustment component
232, lower bearing plate 23 is directly pressed on 3 end face of unit, when the end face out-of-flatness of unit 3, rising-falling tone whole group part in rotating dress
232 are pressed on 3 end face of unit in the screw thread sleeve column 233 on lower bearing plate 23, by lift adjustment component 232.
In the present embodiment, threaded interior hole 51 is offered on pin 5, lead screw 1 passes through affixed with 51 screw-thread fit of threaded interior hole
In pin 5.In the structure, lead screw 1 is fixed in pin 5 by 51 screw-thread fit of threaded interior hole with pin 5, facilitates lead screw 1
It is affixed with pin 5, while making lead screw 1 with the cooperation enough of pin 5 so that lead screw 1 smoothly draws out pin 5 over to one's side.
In the present embodiment, fixing nut 52 is connected on pin 5, lead screw 1 passes through affixed with 52 screw-thread fit of fixing nut
In pin 5.In the structure, nut 52 is welded in pin 5, lead screw 1 by being fixed in pin 5 with 52 screw-thread fit of fixing nut,
Especially when pin 5 is mismatched without threaded interior hole 51 or threaded interior hole 51 with lead screw 1, upper pin 5, side are welded in nut 52
Just quick.
Although the present invention is disclosed as above with preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability
The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible changes and modifications, or is revised as the equivalent embodiment of equivalent variations.Therefore, every
Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment,
Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (8)
1. a kind of pin extracting apparatus, it is characterised in that：Including lead screw（1）And it is used for top pressure unit（3）With lead screw described in drawing
（1）Top pull mechanism（2）, the lead screw（1）One end is fixed in pin（5）, the other end is across the top pull mechanism（2）Screw thread is matched
Conjunction has nut（4）, the nut（4）Compress the top pull mechanism（2）.
2. pin extracting apparatus according to claim 1, it is characterised in that：Top pull mechanism（2）Including upper bearing plate（21）、
Hydraulicefficiency elevation structure（22）And it is used for top pressure unit（3）Lower bearing plate（23）, the hydraulicefficiency elevation structure（22）Bottom end and top
End respectively with the lower bearing plate（23）With the upper bearing plate（21）It is affixed, the upper bearing plate（21）It offers for described
Lead screw（1）The centre bore passed through（211）, the lower bearing plate（23）Offer the pin for extraction（5）By center it is logical
Mouthful（231）, the nut（4）Compress the upper bearing plate（21）.
3. pin extracting apparatus according to claim 2, it is characterised in that：The hydraulicefficiency elevation structure（22）Including pipeline
（222）, hydraulic pump（223）And two with the lead screw（1）For the symmetrically arranged hydraulic jack of symmetry axis（221）, the liquid
Press jack（221）Bottom end and top be respectively and fixedly connected in the lower bearing plate（23）With the upper bearing plate（21）, two institutes
State hydraulic jack（221）Pass through the pipeline（222）It is communicated in the hydraulic pump（223）.
4. pin extracting apparatus according to claim 3, it is characterised in that：The lower bearing plate（23）Bottom end relative to
Two hydraulic jacks（221）Position on be equipped with lift adjustment component（232）, two lift adjustment components
（232）Far from the lower bearing plate（23）One end distinguish top pressure unit（3）.
5. pin extracting apparatus according to claim 4, it is characterised in that：The lift adjustment component（232）Including spiral shell
Line column（2321）And screw shell（2322）, the threaded post（2321）One end is fixed in the lower bearing plate（23）, the other end
It is inserted in the screw shell with thread fiting mode（2322）, the screw shell（2322）Far from the lower bearing plate（23）'s
One end top pressure unit（3）.
6. pin extracting apparatus according to claim 5, it is characterised in that：The lower bearing plate（23）Bottom end relative to
Two hydraulic jacks（221）Position on be connected with screw thread sleeve column（233）, the threaded post（2321）By with institute
State screw thread sleeve column（233）Screw-thread fit forms detachable connection.
7. pin extracting apparatus according to any one of claim 1 to 6, it is characterised in that：Pin（5）On offer spiral shell
Line endoporus（51）, the lead screw（1）By with the threaded interior hole（51）Screw-thread fit is fixed in pin（5）.
8. pin extracting apparatus according to any one of claim 1 to 6, it is characterised in that：Pin（5）On be connected with
Determine nut（52）, the lead screw（1）By with the fixing nut（52）Screw-thread fit is fixed in pin（5）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810635473.7A CN108555825A (en) | 2018-06-20 | 2018-06-20 | Pin extracting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810635473.7A CN108555825A (en) | 2018-06-20 | 2018-06-20 | Pin extracting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108555825A true CN108555825A (en) | 2018-09-21 |
Family
ID=63554197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810635473.7A Pending CN108555825A (en) | 2018-06-20 | 2018-06-20 | Pin extracting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108555825A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653750A (en) * | 2019-08-31 | 2020-01-07 | 广东韶钢松山股份有限公司 | Positioning pin taking-out tool and application method thereof |
| CN112090935A (en) * | 2020-09-14 | 2020-12-18 | 上海建工四建集团有限公司 | Building timber waste recovery device |
| CN112975835A (en) * | 2021-02-04 | 2021-06-18 | 中国十九冶集团有限公司 | Segment opening device for slab caster sector segment and method for removing pin shaft |
| CN113305769A (en) * | 2021-06-10 | 2021-08-27 | 西安微电子技术研究所 | High-torque pin pulling mechanism and pin pulling method for narrow cabin section |
| CN114274093A (en) * | 2021-12-30 | 2022-04-05 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Mechanism and method for pulling out output gear assembly of ram air turbine system |
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| JPH0544472U (en) * | 1991-11-27 | 1993-06-15 | 本田技研工業株式会社 | Dowel pin removal device |
| CN103286550A (en) * | 2013-06-18 | 2013-09-11 | 济钢集团有限公司 | Tool for pulling out pin shafts |
| CN203495859U (en) * | 2013-10-16 | 2014-03-26 | 中国石油化工股份有限公司 | Puller |
| CN103737544A (en) * | 2014-01-09 | 2014-04-23 | 中国神华能源股份有限公司 | Pin pulling tool |
| CN103991056A (en) * | 2014-05-14 | 2014-08-20 | 广西桂冠电力股份有限公司大化水力发电总厂 | Special tool for pulling out woodruff key of crank arm of water guide mechanism of water turbine |
| CN204295622U (en) * | 2014-12-11 | 2015-04-29 | 李华 | Compound sleeve press-in device |
| CN205465962U (en) * | 2016-01-05 | 2016-08-17 | 淮北矿业股份有限公司 | Take mechanically fastening round pin of tight device that rises to demolish device |
| CN106944973A (en) * | 2017-03-08 | 2017-07-14 | 广西真龙实业有限责任公司 | A kind of bore bearings extracting tool |
| CN206811857U (en) * | 2017-06-26 | 2017-12-29 | 陈亦欣 | A kind of easy bearing Mounting device |
| CN207465130U (en) * | 2017-11-15 | 2018-06-08 | 华电福新能源股份有限公司华安水力发电厂 | Weight pin removal |
| CN208451511U (en) * | 2018-06-20 | 2019-02-01 | 国家电网有限公司 | Pin extracting apparatus |
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2018
- 2018-06-20 CN CN201810635473.7A patent/CN108555825A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0544472U (en) * | 1991-11-27 | 1993-06-15 | 本田技研工業株式会社 | Dowel pin removal device |
| CN103286550A (en) * | 2013-06-18 | 2013-09-11 | 济钢集团有限公司 | Tool for pulling out pin shafts |
| CN203495859U (en) * | 2013-10-16 | 2014-03-26 | 中国石油化工股份有限公司 | Puller |
| CN103737544A (en) * | 2014-01-09 | 2014-04-23 | 中国神华能源股份有限公司 | Pin pulling tool |
| CN103991056A (en) * | 2014-05-14 | 2014-08-20 | 广西桂冠电力股份有限公司大化水力发电总厂 | Special tool for pulling out woodruff key of crank arm of water guide mechanism of water turbine |
| CN204295622U (en) * | 2014-12-11 | 2015-04-29 | 李华 | Compound sleeve press-in device |
| CN205465962U (en) * | 2016-01-05 | 2016-08-17 | 淮北矿业股份有限公司 | Take mechanically fastening round pin of tight device that rises to demolish device |
| CN106944973A (en) * | 2017-03-08 | 2017-07-14 | 广西真龙实业有限责任公司 | A kind of bore bearings extracting tool |
| CN206811857U (en) * | 2017-06-26 | 2017-12-29 | 陈亦欣 | A kind of easy bearing Mounting device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653750A (en) * | 2019-08-31 | 2020-01-07 | 广东韶钢松山股份有限公司 | Positioning pin taking-out tool and application method thereof |
| CN112090935A (en) * | 2020-09-14 | 2020-12-18 | 上海建工四建集团有限公司 | Building timber waste recovery device |
| CN112090935B (en) * | 2020-09-14 | 2021-08-31 | 上海建工四建集团有限公司 | Building timber waste recovery device |
| CN112975835A (en) * | 2021-02-04 | 2021-06-18 | 中国十九冶集团有限公司 | Segment opening device for slab caster sector segment and method for removing pin shaft |
| CN113305769A (en) * | 2021-06-10 | 2021-08-27 | 西安微电子技术研究所 | High-torque pin pulling mechanism and pin pulling method for narrow cabin section |
| CN113305769B (en) * | 2021-06-10 | 2022-08-02 | 西安微电子技术研究所 | High-torque pin pulling mechanism and pin pulling method for narrow cabin section |
| CN114274093A (en) * | 2021-12-30 | 2022-04-05 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Mechanism and method for pulling out output gear assembly of ram air turbine system |
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