CN105364779B - For the extracting tool of part in hole - Google Patents
For the extracting tool of part in hole Download PDFInfo
- Publication number
- CN105364779B CN105364779B CN201510958725.6A CN201510958725A CN105364779B CN 105364779 B CN105364779 B CN 105364779B CN 201510958725 A CN201510958725 A CN 201510958725A CN 105364779 B CN105364779 B CN 105364779B
- Authority
- CN
- China
- Prior art keywords
- hole
- expander
- bulge
- expansion
- guide
- 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.)
- Expired - Fee Related
Links
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
- B25B27/06—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 inserting or withdrawing sleeves or bearing races
- B25B27/062—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 inserting or withdrawing sleeves or bearing races using screws
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
A kind of technical field of device therefor when being dismantled the present invention relates to part, there is provided extracting tool for part in hole, including：Bulge and dismounting power part, the bulge is used to be placed in hole, and card access surface is provided with the bulge, and the card access surface is used for and the part clamping in hole；The dismounting power part is connected with the bulge, for the bulge to be taken out from hole.Using said structure, first by the change of bulge diameter come the part in fixing hole, then by dismantling the cooperation of power part such that it is able to easily, conveniently, effortlessly by part taken out from hole, while being not easy part of damage；And, for face contacts between card access surface and part, this adds increased bulge and the contact area of part, so that connecting therebetween more firmly, it is effectively prevented from during part is taken out, the situation that part slides from bulge occurs.
Description
Technical field
The technical field of device therefor when being dismantled the present invention relates to part, is especially for the dismounting work of part in hole
Tool.
Background technology
When for the assembly parts for maintenance such as engineering machinery, vehicle, it usually needs by the bearing in mounting hole, under set dismounting
Come, so that convenient maintenance；Conventionally, as the part such as bearing, set and Kong Jun are interference fits, in dismounting, need
Wanting larger power could go out its blunderbuss or extract.
And for the bearing or set in blind hole, it is impossible to outside blunderbuss, can only can just be taken out by drawing；And make
With traditional triangle chest expander, because the way of contact do not puted forth effort properly between position or chest expander and bearing, set is position
Put narrow point contact, contact not enough firmly, so it is difficult to bearing, set are pulled out, and if the diameter in hole is smaller, tradition
Chest expander cannot be inserted in hole, cannot also be pulled out bearing, set；In addition, waiting all easy damages using traditional instrument sled or pull out
Bad parts, and dismantle extremely difficult.
Simultaneously for the bearing in through hole, set, if internal surface of hole does not have shoulder can with blunderbuss to one side by axle
The blunderbuss such as hold, cover, but, in the prior art, there is shoulder most of through-hole inner surface one end, for fixing bearing or set
Position, so also outwards cannot go out bearing or set by blunderbuss, so can only draw or pull out, and traditional chest expander is difficult to be drawn
Go out.
The content of the invention
It is an object of the invention to provide the extracting tool for part in hole, to solve to be used present in prior art
Traditional instrument is difficult part that blunderbuss goes out or extracts from hole, and it is also possible to can part of damage technical problem.
A kind of extracting tool for part in hole that the present invention is provided, including：Bulge and dismounting power part, it is described swollen
Swollen portion is used to be placed in hole, and card access surface is provided with the bulge, and the card access surface is used for and the part clamping in hole；
The dismounting power part is connected with the bulge, for the bulge to be taken out from hole.
Further, the bulge includes expander and expansion guide, and the expander is set in the expansion and is oriented to
On part, relative motion can occur between the expansion guide and the expander, so as to change the expander access aperture
The diameter of interior part；The card access surface is arranged on the expander.
Further, the expansion guide includes conical head and guide post, described less one end of conical head diameter and institute
State one end connection of guide post；
The expander is set on the conical head, and is fitted with the outer surface of the conical head, the expander
Inner surface is shaped as taper.
Further, the expander includes multiple expansion cells and flexible fastening piece, and multiple expansion cells enclose and set
In the periphery of the conical head, the flexible fastening piece is set on all expansion cells.
Further, set fluted on the lateral wall of the expansion cell, the flexible fastening piece is arranged on the groove
It is interior.
Further, the expander also includes positioning mounting, and it is single that the positioning mounting be located in multiple expansions
Unit is close to one end of the guide post, for positioning the multiple expansion cells of fixation；The positioning mounting is set in described
On guide post.
Further, also including swelling fixture, the swelling fixture is set on the guide post, and with the guiding
Bar is threadedly coupled, and the swelling fixture is used to promote the expander to be moved along the axis direction of the conical head.
Further, shoulder is provided with the lateral wall of the expansion cell, multiple shoulders are spliced into the card access surface.
Further, the dismounting power part includes push rod and pulling force nut, and the push rod is plugged in the interior of the guide post
Portion, and be connected with the guide rod thread；The pulling force nut is arranged on the push rod.
Further, the dismounting power part includes connecting rod and adapter sleeve, and one end of the connecting rod is plugged in described leading
To the inside of bar, the other end is threadedly coupled with a part for the adapter sleeve, and another part of the adapter sleeve is used for and sliding hammer
Connection.
Compared with prior art, beneficial effects of the present invention are：
Provided by the present invention for the extracting tool of part in hole, including：Bulge and dismounting power part, bulge are used for
It is placed in hole, and card access surface is provided with institute's bulge, card access surface is used for and the part clamping in hole；Dismounting power part with it is swollen
Swollen portion's connection, for bulge to be taken out from hole.Using said structure, first by the change of bulge diameter come fixing hole
Interior part, then by dismantling the cooperation of power part such that it is able to easily, conveniently, effortlessly by part taken out from hole, while
It is not easy part of damage；And, for face contacts between card access surface and part, this adds increased bulge and the contact surface of part
Product, so that connecting therebetween more firmly, is effectively prevented from during part is taken out, and part slides from bulge
Situation occur.
Brief description of the drawings
In order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art, below will be to specific
The accompanying drawing to be used needed for implementation method or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the explosive view for the extracting tool of part in hole provided in an embodiment of the present invention；
Fig. 2 is for the axonometric drawing after the assembling of the extracting tool of part in hole shown in Fig. 1；
Fig. 3 for another embodiment of the present invention provide for the axonometric drawing after the assembling of the extracting tool of part in hole；
Fig. 4 is the top view for one of expansion cell of the extracting tool of part in hole shown in Fig. 1.
Reference：
1- expanders 2- expands guide 3- push rods
4- connecting rod 5- sliding hammers
11- expansion cell 12- flexible fastening piece 13- positioning mountings
14- swelling fixture 21- conical head 22- guide posts
31- pulling force nut 41- adapter sleeves
111- groove 112- shoulders
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify describe, rather than indicate imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
Two connections of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Fig. 1 is the explosive view for the extracting tool of part in hole provided in an embodiment of the present invention；Fig. 2 is shown in Fig. 1
For the axonometric drawing after the assembling of the extracting tool of part in hole；Fig. 3 for another embodiment of the present invention provide in hole zero
Axonometric drawing after the assembling of the extracting tool of part；Fig. 4 be shown in Fig. 1 for the extracting tool of part in hole one of them is swollen
The top view of swollen unit.
As Figure 1-4, a kind of extracting tool for part in hole that the present invention is provided, including：Bulge and dismounting
Power part, bulge is used to be placed in hole, and card access surface is provided with bulge, and card access surface is used for and the part card in hole
Connect；Dismounting power part is connected with bulge, for bulge to be taken out from hole.
It should be noted that part can be bearing, set or other parts being arranged on the madial wall of hole；Hole can be
Through hole, or blind hole.
The diameter of part can change according to the different size of different parts in bulge access aperture, so that card access surface
Can be firmly connected with the side wall of part in hole, therefore, every structure that can be functioned as described above can serve as this implementation
The signified bulge of example；Bulge can be the resilient material of tool, change by its internal insufflation gas or liquid etc.
Its diameter.
The effect for dismantling power part is that bulge and part are taken out from hole, can be chest expander or sliding hammer 5, etc.
Deng, as long as the component that bulge can be gone out or be pulled out by blunderbuss in hole can.
The present embodiment provide the specifically used method for the extracting tool of part in hole be：Bulge is placed first
In hole, then change bulge diameter, enable card access surface securely with part clamping, then, by dismantling power part
By bulge and part, blunderbuss goes out or pulls out from hole；Due to bulge entrance can be changed according to the size of part internal diameter
The diameter of part in hole, therefore, it can effectively to expand being applicable for the extracting tool of part in hole for the present embodiment offer
Scope.
Provided by the present invention for the extracting tool of part in hole, including：Bulge and dismounting power part, bulge are used for
It is placed in hole, and card access surface is provided with institute's bulge, card access surface is used for and the part clamping in hole；Dismounting power part with it is swollen
Swollen portion's connection, for bulge to be taken out from hole.Using said structure, first by the change of bulge diameter come fixing hole
Interior part, then by dismantling the cooperation of power part such that it is able to easily, conveniently, effortlessly by part taken out from hole, while
It is not easy part of damage；And, for face contacts between card access surface and part, this adds increased bulge and the contact surface of part
Product, so that connecting therebetween more firmly, is effectively prevented from during part is taken out, and part slides from bulge
Situation occur.
On the basis of above-described embodiment, specifically, bulge includes expander 1 and expansion guide 2,1 set of expander
It is located on expansion guide 2, relative motion can occurs between expansion guide 2 and expander 1, so as to change expander 1 enter
Enter the diameter of part in hole；Card access surface is arranged on expander 1.
Expansion guide 2 can play certain guiding and fixation to the expansion of expander 1, and expander 1 is set in
It is axle with the axis direction for expanding guide 2 on expansion guide 2, to surrounding even inflation, so that coming from of being subject to of part
The clamping power of card access surface is more uniform, it is ensured that part can by stable blunderbuss go out or drawing and go out.
Expansion guide 2 and expander 1 can relative motion, it is real so as to change the diameter of part in the access aperture of expander 1
The mode of existing above-mentioned effect has a variety of selections, for example：Be provided with diameter-changing body, expander 1 on expansion guide 2 for elastic component or
Person's expansion guide 2 is the constant column of diameter, expander 1 with reducing end, etc..
On the basis of above-described embodiment, specifically, as shown in Figure 1 and Figure 4, expansion guide 2 includes the He of conical head 21
Guide post 22, less one end of the diameter of conical head 21 is connected with one end of guide post 22；Expander 1 is set on conical head 21,
And fitted with the outer surface of conical head 21, the inner surface of expander 1 is shaped as taper.
When part in removal hole is needed, conical head 21 and expander 1 are put into hole simultaneously first, then, along taper
First 21 axis direction moves expander 1 towards the one end away from guide post 22, and in moving process, expander 1 is gradually softened,
Its maximum gauge becomes big, so that the card access surface on expander 1 can block part.
Expander 1 is set on conical head 21, and because the inner surface of expander 1 is also taper, therefore, therebetween may be used
To fit completely, expander 1 is more facilitated, effortlessly move on conical head 21；And matching somebody with somebody between two conical surfaces
Conjunction can realize the regulation to the diameter of expander 1.
On the basis of above-described embodiment, specifically, expander 1 includes multiple expansion cells 11 and flexible fastening piece 12,
Multiple expansion cells 11 enclose the periphery for being located at conical head 21, and flexible fastening piece 12 is set on all expansion cells 11.
Flexible fastening piece 12 can have multiple choices, for example：Have resilient belt or turn, etc..Each is swollen
The inner surface of swollen unit 11 is the conical surface, and all conical surfaces are stitched together the taper surface to be formed and be contacted with the outer surface of conical head 21.
Flexible fastening piece 12 can link together multiple expansion cells 11, can simultaneously along the axle of conical head 21
Move in line direction；When multiple expansion cells 11 are moved towards one end that conical head 21 is relatively large in diameter, due to conical head 21
Diameter is increasing, therefore, multiple expansion cells 11 and flexible fastening piece 12 can be gradually strutted, when card access surface blocks zero securely
After part, stop mobile expansion cell 11, part is pulled out finally by dismounting power part or blunderbuss goes out.
Multiple expansion cells 11 can not only be connected into expander 1 by flexible fastening piece 12, are enclosed and are located at the outer of conical head 21
Week, but also can be softened with strutting for expansion cell 11, so that the diameter of expander 1 can be conditioned.
On the basis of above-described embodiment, specifically, as shown in figure 1, setting fluted on the lateral wall of expansion cell 11
111, flexible fastening piece 12 is arranged in groove 111.
In order to preferably fix flexible fastening piece 12, it is to avoid it comes off in the moving process of expansion cell 11, therefore,
Groove 111 is set on the lateral wall of expansion cell 11, the flexible fastening piece 12 is accommodated for placing.
On the basis of above-described embodiment, specifically, as Figure 1-3, expander 1 also includes positioning mounting 13, fixed
Position fixture 13 be located in multiple expansion cells 11 near one end of guide post 22, for positioning fixed multiple expansion cell 11；
Positioning mounting 13 is set on guide post 22.
The Main Function of positioning mounting 13 is that further multiple expansion cells 11 link together, and is additionally, since
It is connected with expansion cell 11 near one end of guide post 22, i.e. the taper surface diameter less of the inner surface of expansion cell 11
End connection, therefore, when expander 1 is softened, the positioning mounting 13 can play certain positioning action, it is to avoid multiple swollen
The situation that swollen unit 11 scatters completely occurs.
On the basis of above-described embodiment, specifically, as Figure 1-3, also including swelling fixture 14, swelling fixture
14 are set on guide post 22, and are threadedly coupled with guide post 22, and swelling fixture 14 is used to promote expander 1 along conical head 21
Axis direction movement.
The effect of swelling fixture 14 is one end movement for promoting expander 1 to be relatively large in diameter towards conical head 21, so that swollen
Swollen body 1 by gradually distending, and, swelling fixture 14 can also be oppositely oriented the remains stationary of bar 22, so that expander 1 is fixed
In some distending state, to ensure that during drawing or blunderbuss, expander 1 will not be moved.
As a kind of preferred scheme, the selection straw hat eaves nut of swelling fixture 14, straw hat eaves nut and the spiral shell of guide post 22
Line is connected, and is connected with the contact of positioning mounting 13, and turn straw hat eaves nut can promote positioning mounting 13 and expander 1
Towards one end movement that conical head 21 is relatively large in diameter, so that the regulation to the diameter of expander 1 is realized, and, when expander 1 is straight
When footpath reaches requirement, straw hat eaves nut is not rotated, the straw hat eaves nut can be with the geo-stationary of guide post 22, so that it is guaranteed that expansion
Body 1 remains the diameter during drawing or blunderbuss go out part.
On the basis of above-described embodiment, specifically, as shown in Fig. 2 being provided with shoulder on the lateral wall of expansion cell 11
112, multiple shoulders 112 are spliced into card access surface.Shoulder 112 is entirely circumferentially positioned at the peripheral direction of expander 1, thus realize with
The face contact of part, increase frictional force therebetween, it is ensured that under expander 1 will not slide from part in the drawing process
Come.
On the basis of above-described embodiment, specifically, as depicted in figs. 1 and 2, dismounting power part includes push rod 3 and pulling force
Nut 31, push rod 3 is plugged in the inside of guide post 22, and is threadedly coupled with guide post 22；Pulling force nut 31 is arranged on push rod 3
On.
Specifically, when bulge is integrally placed in hole, it is necessary to explanation, hole now is blind hole, by push rod 3
Inside and the turn push rod 3 of guide post 22 are plugged in, the bottom of blind hole is withstood in the one end for making push rod 3 enter in blind hole, now,
Push rod 3 is rotated by pulling force nut 31 using instruments such as spanners, the bottom of blind hole has been withstood on due to push rod 3, and can not be after
It is continuous to move down, therefore, in the presence of opposing force, the overall of bulge can do around push rod 3 towards the direction of pulling force nut 31
Screw, so as to part drawing be gone out.
On the basis of above-described embodiment, specifically, as shown in figure 3, dismounting power part includes connecting rod 4 and adapter sleeve
41, one end of connecting rod 4 is plugged in the inside of guide post 22, and the other end is threadedly coupled with a part for adapter sleeve 41, adapter sleeve
41 another part is used to be connected with sliding hammer 5.
When above-mentioned signified hole is through hole, because push rod 3 cannot inwardly hold out against, therefore, just cannot be by relative effect
Power and part is extracted from hole, now, push rod 3 is replaced by connecting rod 4, one end of connecting rod 4 is plugged in guide post 22
Inside, is then linked together connecting rod 4 and the grade actuating unit of sliding hammer 5 by adapter sleeve 41, using sliding hammer 5 impulsive force just
Easily the part in through hole can be extracted.
Certainly it should be noted that the value range of the part internal diameter dismantled as needed, can provide above-described embodiment
The extracting tool for part in hole be made different models, each model one diameter range of correspondence, so that it is full
The dismounting of the part commonly used in sufficient engineering machinery and vehicle, expands it and uses scope.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (4)
1. a kind of extracting tool for part in hole, it is characterised in that including：Bulge and dismounting power part, the expansion
Portion is used to be placed in hole, and card access surface is provided with the bulge, and the card access surface is used for and the part clamping in hole；Institute
State dismounting power part to be connected with the bulge, for the bulge to be taken out from hole；
The bulge includes expander and expansion guide, and the expander is set on the expansion guide, described swollen
Relative motion can occur, so as to change the straight of part in the expander access aperture between swollen guide and the expander
Footpath；The card access surface is arranged on the expander；
The expansion guide includes conical head and guide post, described less one end of conical head diameter and the one of the guide post
End connection；
The expander is set on the conical head, and is fitted with the outer surface of the conical head, the interior table of the expander
Face is shaped as taper；
The dismounting power part includes push rod and pulling force nut, and the push rod is plugged in the inside of the guide post, and with it is described
Guide rod thread is connected；The pulling force nut is arranged on the push rod；
The dismounting power part includes connecting rod and adapter sleeve, and one end of the connecting rod is plugged in the inside of the guide post,
The other end is threadedly coupled with a part for the adapter sleeve, and another part of the adapter sleeve is used to be connected with sliding hammer；
The expander includes multiple expansion cells and flexible fastening piece, and multiple expansion cells enclose and are located at the conical head
Periphery, the flexible fastening piece is set on all expansion cells；
Shoulder is provided with the lateral wall of the expansion cell, multiple shoulders are spliced into the card access surface.
2. the extracting tool for part in hole according to claim 1, it is characterised in that the outside of the expansion cell
Set fluted on wall, the flexible fastening piece is arranged in the groove.
3. the extracting tool for part in hole according to claim 1, it is characterised in that it is fixed that the expander also includes
Position fixture, the positioning mounting be located in multiple expansion cells near one end of the guide post, solid for positioning
Fixed multiple expansion cells；The positioning mounting is set on the guide post.
4. the extracting tool for part in hole according to claim 1, it is characterised in that also including swelling fixture,
The swelling fixture is set on the guide post, and is connected with the guide rod thread, and the swelling fixture is used to push away
The expander is moved to be moved along the axis direction of the conical head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958725.6A CN105364779B (en) | 2015-12-17 | 2015-12-17 | For the extracting tool of part in hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958725.6A CN105364779B (en) | 2015-12-17 | 2015-12-17 | For the extracting tool of part in hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105364779A CN105364779A (en) | 2016-03-02 |
| CN105364779B true CN105364779B (en) | 2017-06-23 |
Family
ID=55367661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510958725.6A Expired - Fee Related CN105364779B (en) | 2015-12-17 | 2015-12-17 | For the extracting tool of part in hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105364779B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106181864A (en) * | 2016-08-23 | 2016-12-07 | 中国电建集团核电工程公司 | Support the formula oil seal installation device that rises |
| CN107825065B (en) * | 2017-12-12 | 2024-05-14 | 江西五十铃发动机有限公司 | Auxiliary tool for taking out bearing by compression and expansion |
| CN108942786A (en) * | 2018-09-18 | 2018-12-07 | 浙江高领新能源科技有限公司 | A kind of universal type permanent magnet motor stator component-dedicated extracting tool |
| CN112936171B (en) * | 2019-12-10 | 2023-01-13 | 国核电站运行服务技术有限公司 | Explosion valve shear cap assembly and disassembly tools |
| CN114986441A (en) * | 2022-07-13 | 2022-09-02 | 重庆蓝黛传动机械有限公司 | Blind hole shaft sleeve dismounting tool |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09295228A (en) * | 1996-04-26 | 1997-11-18 | Tokyo Denki Komusho:Kk | Gland packing removing tool in disassembling small valve |
| CN2551413Y (en) * | 2002-07-01 | 2003-05-21 | 白雪峰 | Tool for withdrawing sleeve from hole inside |
| KR100525361B1 (en) * | 2005-06-29 | 2005-11-02 | 이병원 | Positioning apparatus for assembling heavy object |
| CN201816024U (en) * | 2010-09-30 | 2011-05-04 | 中国石油化工股份有限公司 | Slip embedded tensioner |
| CN203831345U (en) * | 2014-05-12 | 2014-09-17 | 永城煤电控股集团有限公司 | Combined device for disassembling outer sleeve of small bearing of flexible shaft of coal mining machine |
| CN205219006U (en) * | 2015-12-17 | 2016-05-11 | 中国人民解放军装备学院昌平士官学校 | A extracting tool for downthehole part |
-
2015
- 2015-12-17 CN CN201510958725.6A patent/CN105364779B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105364779A (en) | 2016-03-02 |
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Granted publication date: 20170623 Termination date: 20181217 |