CN109926958A - Electric power overhaul Quick power-saving wrench - Google Patents
Electric power overhaul Quick power-saving wrench Download PDFInfo
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- CN109926958A CN109926958A CN201910255494.0A CN201910255494A CN109926958A CN 109926958 A CN109926958 A CN 109926958A CN 201910255494 A CN201910255494 A CN 201910255494A CN 109926958 A CN109926958 A CN 109926958A
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Abstract
The invention discloses a kind of electric power overhaul Quick power-saving wrenchs, belong to general utility tool technical field.That which solve electric power overhaul spanner volumes in the prior art is big, laborsaving, low efficiency and cannot not have the defect of recycling bolt and nut.It mainly includes driving end, transmission device and handle, the driving end includes clamp and inserted link, the transmission device includes sleeve, barrel bore is arranged in described sleeve one end, inserted link can be plugged into barrel bore, partition is successively fixedly mounted in sleeve inner, first planetary reducer and the second planet speeder, guide groove is installed on the partition, installation elastic component and shaft in guide groove, first planetary reducer includes the first sun gear and multiple first planetary gears, described sleeve one end is installed by the first top plate, the second sun gear is fixedly mounted in the middle part of first top plate, the second planet speeder includes the second sun gear, rotating cylinder and multiple second planetary gears.
Description
Technical field
The invention belongs to general utility tool technical fields, specifically, more particularly to a kind of electric power overhaul pulled with fast power-saving
Hand.
Background technique
Spanner is the common tool in electric power overhaul operation, electric power overhaul, especially field electric upkeep operation there is
The feature that high altitude operation, bolt and nut get rusty easily, working space is narrow and risk is big, the spanner that current electrician uses is not
The requirement of these work characteristics can be fully met.Electrician current first is usually common Insulation spanner, this spanner with spanner
It is greatly and laborious to have the shortcomings that volume, and when rotating bolt and nut, radius of turn is typically all the length of spanner, this
The actionradius for further expanding spanner, when electrician is when separating the bolt and nut in narrow space place, if do not closed
The spanner of suitable size, it usually needs peripheral components are separated, and this not only greatly reduces working efficiency, but also increases dangerous system
Number；Then, current some power supply companies can purchase the labour-saving spanner of some on-electrics, and the labour-saving spanner of on-electric is compared with electric wrench
Volume and quality are smaller, are more suitable for electric power overhaul, but the on-electric in Vehicles Collected from Market labour-saving spanner it is general or there is
The shortcomings that volume is big, operative radius is big and low efficiency separates bolt and nut and is commonly divided into two processes, i.e., make bolt for the first time
Nut rotation and subsequent rotate bolt and nut, and it is most sweat that bolt and nut rotation is made under usual first, and subsequent
The rotary course of bolt and nut is then that very easily, current on-electric labour-saving spanner is typically all that overall process is laborsaving, in bolt
Rotational efficienty after nut loosening is usually lower compared with common wrench, and existing on-electric labour-saving spanner generally cannot distinguish between bolt spiral shell
Mother loosens the two processes after preceding and loosening；Secondly, it is one very troublesome that bolt and nut, which is fallen, when electrician is in high-altitude maintenance
Thing, especially when no spare bolt and nut, current electric power overhaul spanner does not have bolt and nut recycling generally
Ability.
Summary of the invention
It is an object of the present invention to provide a kind of electric power overhaul Quick power-saving wrenchs, to overcome electric power overhaul use in the prior art
Spanner volume is big, laborsaving, low efficiency and cannot not have the defect of recycling bolt and nut.
Realization that the present invention adopts the following technical solutions: a kind of electric power overhaul Quick power-saving wrench, including driving end,
Transmission device and handle, it is characterised in that: the driving end includes clamp and inserted link, and the inserted link is prismatic, inserted link circumference
Annular fixing groove is opened up on face；The transmission device includes sleeve, and barrel bore, barrel bore one end is arranged in described sleeve one end
Magnet is fixedly mounted, inserted link can be plugged into barrel bore, and fixed perforation, peace in fixed perforation are opened up on barrel bore periphery
Briquetting is filled, briquetting may pass through fixed perforation and be inserted into fixing groove, and partition is successively fixedly mounted in sleeve inner, the first planet subtracts
Speed variator and the second planet speeder, install guide groove on the partition, installation elastic component and shaft in guide groove, shaft with
Elastic component contacts and oppresses elastic component, and first planetary reducer includes the first sun gear and multiple first planetary gears, set
First ring gear is set on cylinder, and first sun gear is sleeved in shaft and opens up the first driving groove, the first planetary gear difference
It is engaged with the first sun gear and the first ring gear, the multiple first planetary gear is connected by planet carrier, sleeve one end peace
It fills the first top plate, the second sun gear is fixedly mounted in the middle part of the first top plate, open up first through hole on the second sun gear, shaft passes through the
One through-hole, the second planet speeder include the second sun gear, rotating cylinder and multiple second planetary gears, multiple second planetary gears
Connected by planet carrier, rotating cylinder inwall be arranged the second ring gear, second planetary gear respectively with the second ring gear and second too
The second top plate is installed in sun wheel engagement, rotating cylinder one end, and the second through-hole is opened up on the second top plate, and shaft passes through the second through-hole, and second is logical
Open up the second driving groove on hole, be successively fixedly mounted the first driving key and the second driving key in shaft, first driving key and
Second driving key cooperates with the first driving groove and the second driving groove respectively, and terminal pad is installed in described shaft one end；The handle packet
Handle body and connecting cylinder are included, the terminal pad matches to merge with connecting cylinder opens up perforation respectively, installation fastening spiral shell in the perforation
Nut is installed in bolt, fastening bolt end, and a layer insulating is installed on the handle body surface.
Further, first bearing is fixedly mounted in the rotating cylinder inner cavity, and the first bearing is sleeved on sleeve, the set
Circlip is fixedly mounted at first bearing both ends in cylinder respectively.
Further, the material of the circlip is carbon spring steel.
Further, second bearing is fixedly mounted in second sun gear inner cavity, and the second bearing is sleeved in shaft.
Further, the inserted link and barrel bore are six prismatics.
Further, the clamp is Hexagonal jacket, installs magnet on the inner wall of clamp inner cavity one end.
Further, the material of magnet intracavitary in the barrel bore and clamp is Al-Ni-Co permanent magnet iron.
Further, the elastic component is spring.
Further, the handle is vertical structure, and handle body is parallel with the direction of connecting cylinder.
Further, the handle is L-type structure, and handle body is vertical with the direction of connecting cylinder, and the handle further includes
Commutator, the commutator include first connecting rod, the second connecting rod and commutator shell, and the first connecting rod and second connect
First bevel gear and second bevel gear, the first bevel gear and second bevel gear intermeshing is fixedly mounted on extension bar respectively,
The handle is fixedly connected with first connecting rod, and connecting cylinder is fixedly connected with the second connecting rod, the first bevel gear and the second cone tooth
Wheel is installed in commutator shell, is set with insulating layer on the first connecting rod.
Compared with prior art, the beneficial effects of the present invention are: the 1, present invention has knot small in size and small operative radius
Structure advantage, entire length of the invention are 15cm-20cm, and there are two types of structure applications for handle of the present invention, when handle is vertical
When structure, the limited working environment of horizontal space can be met, at work, operative radius is the diameter of handle body, works as hand
Handle is L-type structure, can meet the limited working environment of vertical direction spatial, operative radius is the diameter of handle body, with existing skill
Common wrench or labour-saving spanner in art are compared, and operative radius significantly reduces, and are applicable to narrower operating environment.2, have
Have laborsaving and accelerate two units, improve work efficiency, two that bolt and nut is rotated for the first time and then rotated can be distinguished
Operating process, sleeve inner of the present invention installs the first planetary reducer and the second planet speeder, the first planet subtract
Speed variator corresponds to laborsaving unit, the i.e. operating process of bolt and nut rotation for the first time, is passed using the first planetary reducer
It is dynamic to increase the torsion being transmitted on driving end, but the revolving speed of driving end reduces simultaneously, and the second planet speeder corresponds to
Operating process after accelerator module, i.e. bolt and nut rotate for the first time can with the torsion of very little after bolt and nut loosens
It is rotated, the revolving speed of driving end, but the torsion on driving end simultaneously can be increased by carrying out transmission using the second planet speeder
Power is reduced.3, bolt, nut and gasket can be recycled, when clamp is Hexagonal jacket, magnet is installed in clamp inner cavity one end, when
Bolt and nut can be sucked after backing out by the magnet of clamp inner cavity one end, and if there is gasket, gasket can be sucked simultaneously by magnet.
Detailed description of the invention
Fig. 1 is perspective view of the invention；
Fig. 2 is main view of the invention；
Fig. 3 is the A--A cross-sectional view of Fig. 2；
Fig. 4 is the partial enlarged view I of Fig. 3.
In figure: 1, driving end；2, clamp；3, inserted link；4, fixing groove；5, sleeve；6, barrel bore；7, magnet；8, briquetting；
9, partition；10, guide groove；11, elastic component；12, shaft；13, the first sun gear；14, the first planetary gear；15, the first ring gear；
16, the first driving groove；17, planet carrier；18, the first top plate；19, the second sun gear；20, the second planetary gear；21, rotating cylinder；22,
Two ring gears；23, the second top plate；24, the second driving groove；25, the first driving key；26, the second driving key；27, terminal pad；28,
Handle body；29, connecting cylinder；30, fastening bolt；31, first bearing；32, circlip；33, first connecting rod；34, second
Connecting rod；35, commutator shell；36, first bevel gear；37, second bevel gear；38, second bearing；39, clamp inner cavity.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
A kind of electric power overhaul Quick power-saving wrench, including driving end 1, transmission device and handle, it is characterised in that: described
Driving end 1 includes clamp 2 and inserted link 3, and the inserted link 3 is prismatic, opens up annular fixing groove 4 on 3 periphery of inserted link；The biography
Dynamic device includes sleeve 5, and barrel bore 6 is arranged in described 5 one end of sleeve, and magnet 7 is fixedly mounted in 6 one end of barrel bore, and inserted link 3 can
It is inserted into barrel bore 6, fixed perforation is opened up on 6 periphery of barrel bore, briquetting 8 is installed in fixed perforation, briquetting 8 can be worn
It crosses fixed perforation and is inserted into fixing groove 4, partition 9, the first planetary reducer and second are successively fixedly mounted inside sleeve 5
Planet speeder, installs guide groove 10 on the partition 9, installation elastic component 11 and shaft 12 in guide groove 10, shaft 12 with
Elastic component 11 contacts and oppresses elastic component 11, and first planetary reducer includes the first sun gear 13 and multiple first planets
14 are taken turns, first ring gear 15 is set on sleeve 5, first sun gear 13 is sleeved in shaft 12 and opens up the first driving groove
16, the first planetary gear 14 is engaged with the first sun gear 13 and the first ring gear 15 respectively, and the multiple first planetary gear 14 passes through
Planet carrier 17 connects, and the first top plate 18 is installed in described 5 one end of sleeve, and the second sun gear 19 is fixedly mounted in the middle part of the first top plate 18,
Open up first through hole on second sun gear 19, shaft 12 passes through first through hole, and the second planet speeder includes second too
Sun wheel 19, rotating cylinder 21 and multiple second planetary gears 20, multiple second planetary gears 20 are connected by planet carrier 17, and 21 inner wall of rotating cylinder is set
The second ring gear 22 is set, second planetary gear 20 is engaged with the second ring gear 22 and the second sun gear 19 respectively, rotating cylinder 21 1
Installation the second top plate 23 in end opens up the second through-hole on the second top plate 23, and shaft 12 passes through the second through-hole, and the is opened up on the second through-hole
The first driving key 25 and the second driving key 26,25 He of the first driving key is successively fixedly mounted in shaft 12 in two driving grooves 24
Second driving key 26 cooperates with the first driving groove 16 and the second driving groove 24 respectively, and terminal pad 27 is installed in described 12 one end of shaft；
The handle includes handle body 28 and connecting cylinder 29, and the terminal pad 27 matches to merge with connecting cylinder 29 opens up perforation respectively, institute
It states and fastening bolt 30 is installed in perforation, nut is installed in 30 end of fastening bolt, and one layer of insulation is installed on 28 surface of handle body
Layer.
Clamp 2 of the present invention can fixed object, the object is bolt or nut or screw etc., and inserted link 3 can be inserted
Enter into barrel bore 6, inserted link 3 and barrel bore 6 be it is prismatic, it is prismatic inserted link 3 to be carried out circumferentially positioned, prevent from inserting
Bar 3 rotates, while annular fixing groove 4 is opened up on 3 periphery of inserted link, and fixed perforation is opened up on 6 periphery of barrel bore, and fixation is worn
Briquetting 8 is installed, briquetting 8 may pass through fixed perforation and be inserted into fixing groove 4, and briquetting 8 can carry out inserted link 3 axial fixed in hole
Position, prevents inserted link 3 to be axially moveable, the present invention can also install hinged seat on 5 periphery of sleeve, and briquetting 8 is mounted on hinged seat
It is upper and hinged with hinged seat.Insulating layer on 28 surface of handle body of the present invention is electro-insulating rubber.Of the present invention first
The quantity of planetary gear 14 and the second planetary gear 20 is 4.
First bearing 31 is fixedly mounted in 21 inner cavity of rotating cylinder, and the first bearing 31 is sleeved on sleeve 5, the sleeve
5 are fixedly mounted circlip 32 at 31 both ends of first bearing respectively.
First bearing 31 of the present invention can play a supporting role to sleeve 5, reduce the friction of sleeve 5 and rotating cylinder 21, make
21 generation relative rotation of sleeve 5 and rotating cylinder are without generating axial movement.
The material of the circlip 32 is carbon spring steel.
Second bearing 38 is fixedly mounted in second sun gear, 19 inner cavity, and the second bearing 38 is sleeved in shaft 12.
Second bearing 38 of the present invention can play extraordinary support to shaft 12, while reduce shaft 12 and second too
The friction of sun wheel 19.
The inserted link 3 and barrel bore 6 are six prismatics.
The clamp 2 is Hexagonal jacket, installs magnet 7 on the inner wall of 39 one end of clamp inner cavity.
When clamp 2 of the present invention is Hexagonal jacket, by the way that various types of driving ends 1, the spanner of every kind of model is arranged
The size of first 1 clamp 2 is different from, a kind of bolt and nut of the corresponding size of every kind of model driving end 1, the clamp inner cavity 39
Magnet 7 is installed on the inner wall of one end, can be sucked by the magnet 7 of 39 one end of clamp inner cavity after bolt and nut is backed out, and if there is
Gasket, gasket can be also sucked by magnet 7.
The material of magnet 7 in the barrel bore 6 and clamp inner cavity 39 is Al-Ni-Co permanent magnet iron.
The elastic component 11 is spring.
Elastic component 11 of the present invention is spring, and elastic component 11 can give shaft 12 certain elastic force.
The handle is vertical structure, and handle body 28 is parallel with the direction of connecting cylinder 29.
Handle of the present invention is vertical structure, and vertical structure can meet the limited working environment of horizontal space, work
When, operative radius is the diameter of handle body 28.
The handle is L-type structure, and handle body 28 is vertical with the direction of connecting cylinder 29, and the handle further includes commutation
Device, the commutator include first connecting rod 33, the second connecting rod 34 and commutator shell 35, the first connecting rod 33 and
First bevel gear 36 and second bevel gear 37 is fixedly mounted in two connecting rods 34 respectively, the handle is fixedly connected with first connecting rod
33, connecting cylinder 29 is fixedly connected with the second connecting rod 34, and the first bevel gear 36 and second bevel gear 37 are intermeshed, and described the
One bevel gear 36 and second bevel gear 37 are installed in commutator shell 35, are set with insulation on the first connecting rod 33
Layer.
Handle of the present invention is L-type structure, and L-type structure can meet the limited working environment of vertical direction spatial, operation half
Diameter is the diameter of handle body 28, and compared with common wrench in the prior art or labour-saving spanner, operative radius is significantly reduced,
At work, our rotating handle ontologies 28, then connecting cylinder 29 is by the effect of two bevel gears also linkage rotation, and described first
Insulating layer in connecting rod 33 is ambroin.
The course of work:
When object is bolt, it is the driving end 1 of Hexagonal jacket that we select 2 type of clamp first, will be on sleeve 5
Briquetting 8 takes out from fixed perforation, then the inserted link 3 of driving end 1 is inserted into barrel bore 6, and inserted link 3 is by barrel bore 6
The attraction of magnet 7 be tightly attached on 6 end wall of barrel bore, briquetting 8 is successively pressed into fixed perforation and fixing groove 4, is realized pair
The axial and circumferential of driving end 1 position, and then cover Hexagonal jacket on bolt, the present invention can be reasonably selected according to working environment
The type of handle, the i.e. handle of the handle of vertical structure and L-type structure, when rotating bolt, we are pressed downward handle, hand first
Grip strip turn axis 12 moves down and oppresses elastic component 11, and when the first top plate 18 and the contact of the second top plate 23, shaft 12 stops
Downward pressuring spring, at the same the first driving key 25 enter the first driving groove 16 in, the second driving key 26 completely with the second driving groove
24 separation, we rotating handle on one side oppress while at this time, and handle drives shaft 12 to rotate, the first sun gear 13 of drive of shaft 12
And then rotated with moving sleeve 5, sleeve 5 drives driving end 1 to act on bolt, at this time due to being that the first sun gear 13 is used as power wheel,
So effect of the invention is labour-saving spanner, i.e., the angular speed of driving end 1 significantly reduces compared with handle but torsion increases, and works as spiral shell
After bolt is moved by rotation, bolt generally only needs the torsion of very little that can rotate at this time, we stop force handle, shaft 12 and hand
Handle moves up under the action of the spring, while the first driving key 25 is kept completely separate with the first driving groove 16, the second driving key 26 into
Enter in the second driving groove 24, at this time when our rotating handles, shaft 12 will drive the rotation of rotating cylinder 21, and drive 5 He of sleeve in turn
Driving end 1 rotates, at this time since power wheel is rotating cylinder 21, so the present invention is integrally used as speedup spanner, i.e., when we rotate hand
When handle one encloses, driving end 1 can be rotated multi-turn.
Claims (10)
1. a kind of electric power overhaul Quick power-saving wrench, including driving end (1), transmission device and handle, it is characterised in that: described
Driving end (1) includes clamp (2) and inserted link (3), and the inserted link (3) is prismatic, opens up annular fixation on inserted link (3) periphery
Slot (4)；The transmission device includes sleeve (5), and barrel bore (6) are arranged in described sleeve (5) one end, barrel bore (6) one end
It being fixedly mounted magnet (7), inserted link (3) can be plugged into barrel bore (6), fixed perforation is opened up on barrel bore (6) periphery,
Briquetting (8) are installed in fixed perforation, briquetting (8) may pass through it is fixed perforate and be inserted into fixing groove (4), sleeve (5) it is internal according to
Secondary fixed installation partition (9), the first planetary reducer and the second planet speeder install guide groove on the partition (9)
(10), installation elastic component (11) and shaft (12), shaft (12) contact with elastic component (11) and oppress elasticity in guide groove (10)
Part (11), first planetary reducer include the first sun gear (13) and multiple first planetary gears (14), and sleeve is set on (5)
It sets the first ring gear (15), first sun gear (13) is sleeved on shaft (12) and opens up the first driving groove (16), first
Planetary gear (14) is engaged with the first sun gear (13) and the first ring gear (15) respectively, and the multiple first planetary gear (14) passes through
The first top plate (18) are installed in planet carrier (17) connection, described sleeve (5) one end, and second is fixedly mounted in the middle part of the first top plate (18) too
Sun takes turns (19), and first through hole is opened up on the second sun gear (19), and shaft (12) passes through first through hole, the second planet speedup dress
It sets including the second sun gear (19), rotating cylinder (21) and multiple second planetary gears (20), multiple second planetary gears (20) pass through planet
Frame (17) connection, rotating cylinder (21) inner wall be arranged the second ring gear (22), second planetary gear (20) respectively with the second ring gear
(22) and the second top plate (23) are installed in the second sun gear (19) engagement, rotating cylinder (21) one end, and the second top plate opens up second on (23)
Through-hole, shaft (12) pass through the second through-hole, open up the second driving groove (24) on the second through-hole, shaft is successively fixedly mounted on (12)
First driving key (25) and the second driving key (26), first driving key (25) and the second driving key (26) are passed with first respectively
Terminal pad (27) are installed in dynamic slot (16) and the second driving groove (24) cooperation, described shaft (12) one end；The handle includes handle
Ontology (28) and connecting cylinder (29), the terminal pad (27) matches to merge with connecting cylinder (29) opens up perforation respectively, in the perforation
It installs fastening bolt (30), nut is installed in fastening bolt (30) end, and a layer insulating is installed on handle body (28) surface.
2. electric power overhaul Quick power-saving wrench according to claim 1, it is characterised in that: rotating cylinder (21) inner cavity is solid
Dingan County fills first bearing (31), and the first bearing (31) is sleeved on sleeve (5), and the sleeve (5) is in first bearing (31)
Circlip (32) are fixedly mounted in both ends respectively.
3. electric power overhaul Quick power-saving wrench according to claim 2, it is characterised in that: the circlip (32)
Material is carbon spring steel.
4. electric power overhaul Quick power-saving wrench according to claim 1, it is characterised in that: second sun gear (19)
Second bearing (38) are fixedly mounted in inner cavity, and the second bearing (38) is sleeved on shaft (12).
5. electric power overhaul Quick power-saving wrench according to claim 1, it is characterised in that: the inserted link (3) and sleeve
Inner cavity (6) is six prismatics.
6. electric power overhaul Quick power-saving wrench according to claim 5, it is characterised in that: the clamp (2) is hexagonal
Sleeve installs magnet (7) on the inner wall of clamp inner cavity (39) one end.
7. electric power overhaul Quick power-saving wrench according to claim 6, it is characterised in that: the barrel bore (6) and
The material of magnet (7) in clamp inner cavity (39) is Al-Ni-Co permanent magnet iron.
8. electric power overhaul Quick power-saving wrench according to claim 1, it is characterised in that: the elastic component (11) is bullet
Spring.
9. electric power overhaul Quick power-saving wrench according to claim 1, it is characterised in that: the handle is to tie vertically
Structure, handle body (28) are parallel with the direction of connecting cylinder (29).
10. electric power overhaul Quick power-saving wrench according to claim 1, it is characterised in that: the handle is L-type knot
Structure, handle body (28) is vertical with the direction of connecting cylinder (29), and the handle further includes commutator, and the commutator includes first
Connecting rod (33), the second connecting rod (34) and commutator shell (35), the first connecting rod (33) and the second connecting rod (34)
Upper fixed installation first bevel gear (36) and second bevel gear (37), the handle respectively are fixedly connected with first connecting rod (33),
Connecting cylinder (29) is fixedly connected the second connecting rod (34), the first bevel gear (36) and second bevel gear (37) intermeshing,
The first bevel gear (36) and second bevel gear (37) are installed in commutator shell (35), the first connecting rod (33)
On be set with insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255494.0A CN109926958B (en) | 2019-04-01 | 2019-04-01 | Quick labor-saving wrench for electric power overhaul |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255494.0A CN109926958B (en) | 2019-04-01 | 2019-04-01 | Quick labor-saving wrench for electric power overhaul |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109926958A true CN109926958A (en) | 2019-06-25 |
| CN109926958B CN109926958B (en) | 2020-11-27 |
Family
ID=66988926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910255494.0A Active CN109926958B (en) | 2019-04-01 | 2019-04-01 | Quick labor-saving wrench for electric power overhaul |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109926958B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112518644A (en) * | 2020-11-30 | 2021-03-19 | 国网青海省电力公司黄化供电公司 | Single-rod electrified bolt fastening tool |
| CN112894687A (en) * | 2021-01-29 | 2021-06-04 | 中国人民解放军第五七一九工厂 | Aero-engine counterweight screw subpackaging tool and method |
| CN112909828A (en) * | 2021-01-15 | 2021-06-04 | 重庆仟知佳科技有限公司 | Cable tensioning device for electric power paying-off |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112909828A (en) * | 2021-01-15 | 2021-06-04 | 重庆仟知佳科技有限公司 | Cable tensioning device for electric power paying-off |
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| CN112894687A (en) * | 2021-01-29 | 2021-06-04 | 中国人民解放军第五七一九工厂 | Aero-engine counterweight screw subpackaging tool and method |
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