CN110182675A - A kind of traction machine - Google Patents
A kind of traction machine Download PDFInfo
- Publication number
- CN110182675A CN110182675A CN201910528335.3A CN201910528335A CN110182675A CN 110182675 A CN110182675 A CN 110182675A CN 201910528335 A CN201910528335 A CN 201910528335A CN 110182675 A CN110182675 A CN 110182675A
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- Prior art keywords
- brake
- shaft
- fixed
- shell
- rotor
- Prior art date
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- 238000009434 installation Methods 0.000 claims abstract description 15
- 239000000428 dust Substances 0.000 claims abstract description 14
- 230000015572 biosynthetic process Effects 0.000 claims abstract 2
- 108700028490 CAP protocol 2 Proteins 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
- B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Braking Arrangements (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a kind of traction machines, including base, motor is integrated, traction sheave, and brake, it is characterized by: the base includes shell and end cap, the shell and end cap combination one cavity structure of fixed formation, the motor is integrally disposed in cavity, the integrated motor includes shaft, rotor, and stator, the rotor, which is arranged, to be fixed in the middle part of shaft, the stator and shaft coaxial line are arranged, the stator is immobilized in the shell portion, the rotor and stator, which cooperate, forms electric machine structure, the end cap outer end face is provided with the brake installation protrusion of evagination, the brake includes main part, push plate, dust cover, electromagnet is integrated, first brake piece, and second brake block, the invention enables shaft, stress balance is good during rotation, ensure the long-time steady operation of traction machine, and ensure electricity The sealed damp-proof of machine, and brake is enable to separate with brake disc rapidly in stopping braking rear braking piece, improve the service life of brake.
Description
Technical field
The present invention relates to traction machine technical field, specially a kind of traction machine.
Background technique
Elevator traction machine is the power-equipment of elevator, also known as elevator host.Function is to convey to transport elevator with transmitting power
Row.Existing traction machine, includes internal rotor traction machine and outer rotor tractor, existing outer rotor tractor, shaft
One end it is convex for frame shell, for arranging traction sheave, in the actual process, since to only have one end convex in base shell for shaft
Body, during operation, the side nose of shaft are larger with respect to stress, and after working long hours, shaft can run-off the straight or fortune
Turn jiggly phenomenon, makes the steady operation service life of traction machine short；And existing outer rotor tractor, due to rotor and machine
There are the gaps of installation between seat shell body, so that motor cavity has segment space to be communicated with the outside, so that the humidity resistance of motor is not
It is good, it is easy the entrance due to steam and motor part is caused to generate fortuitous event, moreover, traction machine after end of braking, brakes
Piece cannot be detached from time with brake disc, thus continuing friction makes traction machine generate heat, and causes its service life lower.
Summary of the invention
The purpose of the present invention is to provide a kind of traction machines, and the invention enables shaft, stress balance is good during rotation,
Ensure the long-time steady operation of traction machine, and ensure the sealed damp-proof of motor, and brake is made to stop braking rear braking piece
It can be separated with brake disc rapidly, improve the service life of brake.
To achieve the above object, the invention provides the following technical scheme: a kind of traction machine, including base, motor are integrated, draged
Running wheel and brake, the base include shell and end cap, and the shell and end cap combination are fixed and form a cavity knot
Structure, the motor are integrally disposed in cavity,
The integrated motor includes shaft, rotor and stator, and the rotor, which is arranged, to be fixed in the middle part of shaft, described fixed
Son arranges that the stator is immobilized in the shell portion, the rotor and stator mutual cooperation composition electric machine structure with shaft coaxial line,
One end of the shaft passes through shell, and the junction of shaft and shell is rotatablely connected by first bearing, and the shaft is across shell
It is arranged after body in its end and is fixed with traction sheave, cover board is housed in the axial outer end lid of the traction sheave, the cover board passes through spiral shell
Bolt is fixed on the end of shaft, and the other end of the shaft passes through end cap, and the junction of shaft and end cap passes through second bearing and turns
Dynamic connection, the shaft are arranged in its end after end cap and are fixed with brake disc,
The end cap outer end face be provided with evagination brake installation protrusion, the brake include main part, push plate,
Dust cover, electromagnet integrate, first brake piece and the second brake block, the main part of the brake are solid by stay bolt
Be scheduled in installation protrusion, there are gap between main part and installation protrusion, the body portion inner side vertically in the inner
End face is fixed with multiple first slide bars, and the push plate is slidably connected on the first slide bar, the first brake piece and the second brake
Parallel and coaxial line the two sides that brake disc is arranged in, the lateral surface of second brake block are equipped with a circle perpendicular to it to piece respectively
Second slide bar on surface, circle second slide bar is arranged in a ring as the center of circle using the center of the second brake block, and described second is sliding
Bar slides through the surface of first brake piece, and the first brake piece is fixed in push plate, the dust cover altogether there are two and it is right
The upper/lower terminal for being fixed on main part claimed is respectively provided with an electromagnet in each dust cover and integrates, the electromagnet collection
At include the first magnetic yoke, the second magnetic yoke, the permanent magnet matched with the first magnetic yoke and the armature matched with the second magnetic yoke,
First magnetic yoke is fixed in main part, and the permanent magnet is fixed in push plate, and second magnetic yoke is fixed on dust cover
On, the armature is fixed on vertical bar, is located above the end that vertical bar is fixed on the second slide bar of top, underlying perpendicular
Bar is fixed on the end of the second slide bar of lowermost end.
Preferably, center avoid holes are provided at the position corresponding to shaft of the main part of the brake, encoded
The affixed shaft of device and the arrangement in the region of center avoid holes.
Preferably, the exposed junction of the radial end face of the first shell is provided with a disk shaft plug-in opening, described to drag
It is integrated with manual actuation gear on running wheel, convenient for the smooth inserting of the shaft of turntable, and makes the corresponding gear of turntable smooth
Mesh manual drives gear.
Preferably, the shaft of the junction of the rotor and shaft and the side of close traction sheave is equipped with installation protrusion,
It is arranged in the shaft close to the side of brake disc and is fixed with the elastic spring that a circle prevents rotor level from sliding.
Preferably, top spring is equipped between the first brake piece and the second brake block, the top spring is set in the second slide bar
On.
Preferably, the two sides of the bottom of the shell are respectively arranged with support foot, and corresponding peace is provided on the support foot
Connecting hole is filled, base is easily installed.
Preferably, the top two sides of the shell are fixed with a pair of annular lifting lug.
Compared with prior art, beneficial effects of the present invention are as follows:
One, the invention enables shaft, stress balance is good during rotation, it is ensured that the long-time steady operation of traction machine, and
Ensure the sealed damp-proof of motor, and brake is enable to separate with brake disc rapidly in stopping braking rear braking piece, improves system
The service life of dynamic device.
Two, the bodied rotor of motor of the present invention is located at the opposite center in shaft length direction, when so that shaft rotating
Axial length direction both ends stress balance so that stress balance is good during rotation for shaft, it is ensured that traction machine it is long when
Between stable operation；
Three, the present invention will be in the integrally disposed closed cavity surrounded with shell and end cap of motor, it is ensured that motor
Moisture resistance；
Four, in braking, the first magnetic yoke and the second magnetic yoke are powered and generate magnetic field the present invention, and the first magnetic yoke is opposite with permanent magnet
The magnetic pole of one end is identical thus mutually exclusive, and permanent magnet drives the first brake piece in push plate mobile to brake disc one end, and second
Magnetic yoke generates magnetic field after being powered and attracts armature, and armature pulls the second brake block one to brake disc by vertical bar, cross bar
End movement makes first brake piece and the second brake block clamp brake disc, so that shaft is braked,
When end of braking, the first magnetic yoke and the second magnetic yoke are powered off, no longer generation magnetic field, are located at first brake piece and second
Top spring between brake block can rapidly open two brake blocks, to disconnect the contact with brake disc, reduce friction and generate
Heat, improve the service life of traction machine.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention one；
Fig. 2 is schematic structural view of the invention two
Fig. 3 is main sectional view of the invention；
Fig. 4 is the enlarged diagram in Fig. 3 of the present invention at A；
Fig. 5 is the schematic diagram of another state of Fig. 3 of the present invention (releasing braking)；
Fig. 6 is the main view of the second brake block of the invention；
Fig. 7 is the enlarged diagram in Fig. 3 of the present invention at B；
In figure: 1- traction sheave, 2- shell, 3- end cap, 4- shaft, 5- rotor, 6- stator, 7- first bearing, 8- cover board, 9-
Brake disc, 10- brake installation protrusion, 11- main part, 12- push plate, 13- dust cover, 14- first brake piece, 15- second
Brake block, the first slide bar of 16-, the second slide bar of 17-, the first magnetic yoke of 18-, the second magnetic yoke of 19-, 20- permanent magnet, 21- armature, 22-
Vertical bar, the top 23- spring, 24- elastic spring, 25- encoder, 26- support foot, 27- install connecting hole, 28- lifting lug, and 29- drives manually
Moving gear, 30- disk shaft plug-in opening.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 to Fig. 7 is please referred to, the present invention provides a kind of technical solution: a kind of traction machine, including base, motor are integrated, draged
Running wheel 1 and brake, the base include shell 2 and end cap 3, and the shell 2 and the combination of end cap 3 are fixed and form a sky
Cavity configuration, the motor are integrally disposed in cavity,
The integrated motor includes shaft 4, rotor 5 and stator 6, and the rotor 5, which is arranged, is fixed on 4 middle part of shaft, institute
It states stator 6 and 4 coaxial line of shaft is arranged, the stator 6 is fixed on inside shell 2, the rotor 5 and 6 mutual cooperation group of stator
At electric machine structure, one end of the shaft 4 passes through shell 2, and shaft 4 and the junction of shell 2 are connected by the rotation of first bearing 7
It connects, the shaft 4 is arranged in its end after shell 2 and is fixed with traction sheave 1, fills in the axial outer end lid 3 of the traction sheave 1
There is cover board 8, the cover board 8 is bolted on the end of shaft 4,
The other end of the shaft 4 passes through end cap 3, and shaft 4 and the junction of end cap 3 are rotatablely connected by second bearing,
The shaft 4 is arranged in its end after end cap 3 and is fixed with brake disc 9,
3 outer end face of end cap be provided with evagination brake installation protrusion 10, the brake include main part 11,
Push plate 12, dust cover 13, electromagnet be integrated, first brake piece 14 and the second brake block 15, the main part of the brake
11 are fixed in installation protrusion by stay bolt, and there are gaps between main part 11 and installation protrusion, in the main part
Dividing 11 inner verticals, end face is fixed with multiple first slide bars 16 in the inner, and the push plate 12 is slidably connected on the first slide bar 16,
The first brake piece 14 and the second brake block 15 parallel and coaxial line two sides that brake disc 9 is set respectively, described second
The lateral surface of brake block 15 is equipped with a circle perpendicular to second slide bar 17 on its surface, and circle second slide bar 17 is with the second brake
The center of piece 15 is that the center of circle is arranged in a ring, and second slide bar 17 slides through the surface of first brake piece 14, described first
Brake block 14 is fixed in push plate 12, the dust cover 13 altogether there are two and be symmetrically fixed on upper and lower the two of main part 11
End is respectively provided with an electromagnet in each dust cover 13 and integrates, and the integrated electromagnet includes the first magnetic yoke 18, the second magnetic yoke
19, the permanent magnet 20 matched with the first magnetic yoke 18 and the armature 21 matched with the second magnetic yoke 19, first magnetic yoke 18
It being fixed in main part 11, the permanent magnet 20 is fixed in push plate 12, and second magnetic yoke 19 is fixed on dust cover 13,
The armature 21 is fixed on vertical bar 22, the end that vertical bar 22 is fixed on the second slide bar 17 of top is located above, under being located at
The vertical bar 22 of side is fixed on the end of the second slide bar 17 of lowermost end.
Preferably, center avoid holes are provided at the position corresponding to shaft 4 of the main part 11 of the brake, compiled
The affixed shaft 4 of code device 25 and the arrangement in the region of center avoid holes.
Preferably, the exposed junction of the radial end face of the first shell 2 is provided with a disk shaft plug-in opening 30, described
Manual actuation gear 29 is integrated on traction sheave 1.
Preferably, the rotor 5 and the shaft 4 of the junction of shaft 4 and the side of close traction sheave 1 are equipped with installation
Protrusion is arranged in the shaft 4 close to the side of brake disc 9 and is fixed with the elastic spring 24 that a circle prevents the level of rotor 5 from sliding.
Preferably, top spring 23 is equipped between the first brake piece 14 and the second brake block 15, the top spring 23 is set in
On second slide bar 17.
Preferably, the two sides of the bottom of the shell 2 are respectively arranged with support foot 26, are provided with correspondence on the support foot 26
Installation connecting hole 27.
Preferably, the top two sides of the shell 2 are fixed with a pair of annular lifting lug 28.
Working principle: the invention enables shaft, stress balance is good during rotation, it is ensured that the long-time stable of traction machine
Operation, and ensure the sealed damp-proof of motor, and brake is enable to separate with brake disc rapidly in stopping braking rear braking piece, it mentions
The high service life of brake.
The bodied rotor of motor of the present invention is located at the opposite center in shaft length direction, so that axis when shaft rotates
To the stress balance at length direction both ends, so that stress balance is good during rotation for shaft, it is ensured that the long-time of traction machine is steady
Fixed operation；
The present invention will motor it is integrally disposed with shell and in closed cavity that end cap is surrounded, it is ensured that motor it is moisture-proof
Property；
In braking, the first magnetic yoke and the second magnetic yoke are powered and generate magnetic field, the first magnetic yoke opposite with permanent magnet one present invention
The magnetic pole at end is identical thus mutually exclusive, and permanent magnet drives the first brake piece in push plate mobile to brake disc one end, the second magnetic
Yoke generates magnetic field after being powered and attracts armature, and armature pulls the one end of the second brake block to brake disc by vertical bar, cross bar
It is mobile, so that first brake piece and the second brake block is clamped brake disc, so that shaft is braked,
When end of braking, the first magnetic yoke and the second magnetic yoke are powered off, no longer generation magnetic field, are located at first brake piece and second
Top spring between brake block can rapidly open two brake blocks, to disconnect the contact with brake disc, reduce friction and generate
Heat, improve the service life of traction machine.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of traction machine, including base, motor are integrated, traction sheave (1) and brake, it is characterised in that: the base packet
Shell (2) and end cap (3) are included, the shell (2) and end cap (3) combination one cavity structure of fixed formation, the motor are integrated
It is arranged in cavity,
The motor is integrated including shaft (4), rotor (5) and stator (6), and the rotor (5), which is arranged, is fixed on shaft (4)
Middle part, the stator (6) and shaft (4) coaxial line arrange that the stator (6) is fixed on shell (2) inside, the rotor (5)
It cooperates with stator (6) and forms electric machine structure, one end of the shaft (4) passes through shell (2), shaft (4) and shell (2)
Junction is rotatablely connected by first bearing (7), and the shaft (4) is arranged in its end after shell (2) and is fixed with traction
It takes turns (1), cover board (8) is housed in the axial outer end lid (3) of the traction sheave (1), the cover board (8) is bolted on shaft
(4) end,
The other end of the shaft (4) passes through end cap (3), and the junction of shaft (4) and end cap (3) is rotated by second bearing to be connected
It connecing, the shaft (4) is arranged in its end after end cap (3) and is fixed with brake disc (9),
The brake that end cap (3) outer end face is provided with evagination installs raised (10), and the brake includes main part
(11), push plate (12), dust cover (13), electromagnet be integrated, first brake piece (14) and the second brake block (15), the system
The main part (11) of dynamic device is fixed in installation protrusion by stay bolt, main part (11) with install between raised there are
Gap, in the main part (11) inner vertical, end face is fixed with multiple first slide bars (16), the push plate (12) in the inner
It is slidably connected on the first slide bar (16), the first brake piece (14) is parallel and coaxial line respectively with the second brake block (15)
Two sides in brake disc (9) are set, and the lateral surface of second brake block (15) is equipped with a circle and slides perpendicular to the second of its surface
Bar (17), circle second slide bar (17) is arranged in a ring as the center of circle using the center of the second brake block (15), and described second is sliding
Bar (17) slides through the surface of first brake piece (14), and the first brake piece (14) is fixed on push plate (12), described anti-
It is fixed on there are two dust hood (13) is total and symmetrically the upper/lower terminal of main part (11), is respectively set in each dust cover (13)
Have that an electromagnet is integrated, the electromagnet it is integrated including the first magnetic yoke (18), the second magnetic yoke (19), with the first magnetic yoke (18) phase
The permanent magnet (20) of cooperation and the armature (21) matched with the second magnetic yoke (19), first magnetic yoke (18) are fixed on master
On body portion (11), the permanent magnet (20) is fixed on push plate (12), and second magnetic yoke (19) is fixed on dust cover (13)
On, the armature (21) be fixed on vertical bar (22), is located above the second slide bar (17) that vertical bar (22) is fixed on top
End, underlying vertical bar (22) are fixed on the end of the second slide bar (17) of lowermost end.
2. a kind of traction machine according to claim 1, it is characterised in that: the correspondence of the main part (11) of the brake
It is provided with center avoid holes at the position of shaft (4), the affixed shaft (4) of encoder (25) and is located at center avoid holes
Region in arrange.
3. a kind of traction machine according to claim 1, it is characterised in that: outside the radial end face of the first shell (2)
Dew end is provided with a disk shaft plug-in opening (30), is integrated with manual actuation gear (29) on the traction sheave (1).
4. a kind of traction machine according to claim 1, it is characterised in that: the junction of the rotor (5) and shaft (4),
And it is equipped with installation protrusion close to the shaft (4) of the side of traction sheave (1), in the shaft (4) close to the side of brake disc (9)
It is arranged and is fixed with the elastic spring (24) that a circle prevents rotor (5) level from sliding.
5. a kind of traction machine according to claim 1, it is characterised in that: the first brake piece (14) and the second brake block
(15) top spring (23) is equipped between, the top spring (23) is set on the second slide bar (17).
6. a kind of traction machine according to claim 1, it is characterised in that: the two sides of the bottom of the shell (2) are respectively set
Have support foot (26), corresponding installation connecting hole (27) is provided on the support foot (26).
7. a kind of traction machine according to claim 1, it is characterised in that: the top two sides of the shell (2) are fixed with one
To annular lifting lug (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910528335.3A CN110182675B (en) | 2019-06-18 | 2019-06-18 | Traction machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910528335.3A CN110182675B (en) | 2019-06-18 | 2019-06-18 | Traction machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110182675A true CN110182675A (en) | 2019-08-30 |
| CN110182675B CN110182675B (en) | 2020-12-22 |
Family
ID=67722307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910528335.3A Active CN110182675B (en) | 2019-06-18 | 2019-06-18 | Traction machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110182675B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110143511A (en) * | 2019-06-18 | 2019-08-20 | 浙江弗尔德驱动科技有限公司 | A kind of Novel traction machine structure |
| CN110143510A (en) * | 2019-06-18 | 2019-08-20 | 浙江弗尔德驱动科技有限公司 | A kind of modified traction machine |
| CN110155863A (en) * | 2019-06-18 | 2019-08-23 | 浙江弗尔德驱动科技有限公司 | A kind of traction machine of Novel brake mode |
| CN110182674A (en) * | 2019-06-18 | 2019-08-30 | 浙江弗尔德驱动科技有限公司 | A kind of traction machine |
| CN110182673A (en) * | 2019-06-18 | 2019-08-30 | 浙江弗尔德驱动科技有限公司 | A kind of Novel traction machine |
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| CN101291088A (en) * | 2007-04-20 | 2008-10-22 | 王新安 | Cycloid permanently magnetically synchronized driving gear for elevator |
| CN101554972A (en) * | 2009-04-29 | 2009-10-14 | 常熟市佳能电梯配件有限公司 | Passenger and goods elevator tractor suitable for frame-type machine-roomless installation |
| CN204057840U (en) * | 2014-07-04 | 2014-12-31 | 浙江西子富沃德电机有限公司 | A kind of electromagnetic disc type brake and the towing machine of this electromagnetic disc type brake is housed |
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| CN2288952Y (en) * | 1997-01-27 | 1998-08-26 | 黄民英 | Cantilever wheel type planetary gear traction engine |
| CN101291088A (en) * | 2007-04-20 | 2008-10-22 | 王新安 | Cycloid permanently magnetically synchronized driving gear for elevator |
| CN201068360Y (en) * | 2007-07-11 | 2008-06-04 | 苏州通润驱动设备股份有限公司 | Thin type permanent magnetism synchronization gear wheel free traction machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110143511A (en) * | 2019-06-18 | 2019-08-20 | 浙江弗尔德驱动科技有限公司 | A kind of Novel traction machine structure |
| CN110143510A (en) * | 2019-06-18 | 2019-08-20 | 浙江弗尔德驱动科技有限公司 | A kind of modified traction machine |
| CN110155863A (en) * | 2019-06-18 | 2019-08-23 | 浙江弗尔德驱动科技有限公司 | A kind of traction machine of Novel brake mode |
| CN110182674A (en) * | 2019-06-18 | 2019-08-30 | 浙江弗尔德驱动科技有限公司 | A kind of traction machine |
| CN110182673A (en) * | 2019-06-18 | 2019-08-30 | 浙江弗尔德驱动科技有限公司 | A kind of Novel traction machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110182675B (en) | 2020-12-22 |
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Denomination of invention: A traction machine Granted publication date: 20201222 Pledgee: Nanxun Zhejiang rural commercial bank Limited by Share Ltd. Pledgor: ZHEJIANG FURDER DIVING TECHNOLOGY CO.,LTD. Registration number: Y2024980001971 |
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