CN209239437U - A kind of disassembling fixture - Google Patents
A kind of disassembling fixture Download PDFInfo
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- CN209239437U CN209239437U CN201822145663.9U CN201822145663U CN209239437U CN 209239437 U CN209239437 U CN 209239437U CN 201822145663 U CN201822145663 U CN 201822145663U CN 209239437 U CN209239437 U CN 209239437U
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- gauge
- clamping
- disassembling fixture
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Abstract
The utility model discloses a kind of disassembling fixtures, belong to technical field of rail traffic.The disassembling fixture includes support, the positioning plate for being set to bracket one end, end cap clamping mounted box and separates driving assembly, wherein end cap gripping mechanism includes clamping bracket, the clamping driving assembly for being provided with multiple snap-gauges on clamping bracket and multiple snap-gauges capable of being driven close to each other or separate, plurality of snap-gauge is provided with arc groove, the end cap to be removed of energy clamping rotor after multiple snap-gauges are close to each other；It separates driving assembly to connect with end cap gripping mechanism, and separating driving assembly includes driving device and slide assemblies, driving device can make end cap gripping mechanism mobile towards the direction far from support.The utility model is by being provided with multiple snap-gauges of arc groove, so that multiple snap-gauges can form the circular trough being adapted to end cap after, the problem of disassembly mode damage and Three-claw pull-horse caused by end cap for solving induction heater is uneven to end cap applied force, and end cap is caused to be pulled.
Description
Technical field
The utility model relates to technical field of rail traffic more particularly to a kind of disassembling fixtures.
Background technique
With the fast development of China express railway, large-scale application is had been obtained in EMU, while dynamic in order to ensure
The safe operation of vehicle group, also more stringent requirements are proposed for the maintenance to EMU key components and parts and maintenance.In each of EMU
In component, power source of the traction electric machine as driving vehicle comprising rotor and stator, motor stator pass through magnetic field band after being powered
The rotation of turn, rotor high speed rotation provides power source for vehicle, therefore maintenance to rotor and maintenance require also very sternly
Lattice, it is necessary to carry out upkeep operation in strict accordance with maintenance craft process requirements.
When rotor is repaired and maintained, need first to dismantle the bearing (ball) cover that rotor connects, it is existing
Rotor bearing end cap disassembling fixture or disassembly technique generally use following manner:
1, in such a way that induction heater is to bearing (ball) cover heating, dismantle bearing bore diameter expansion；
2, bearing (ball) cover is dismantled by using hydraulic Three-claw pull-horse disassembling fixture, wherein Three-claw pull-horse blocks end
Lid, hydraulic cylinder withstand the shaft end of rotor.
During realizing the utility model, at least there are the following problems in the prior art for inventor's discovery:
In such a way that induction heater dismantles bearing, end cap inner bearing and end cap service life are influenced, is passed through
Ji property is bad；The disassembly mode of hydraulic Three-claw pull-horse needs to connect various toolings, inefficiency, and Three-claw pull-horse manually to axis
The pressure of socket end lid application is simultaneously uneven, causes bearing (ball) cover to have once in a while and pulls phenomenon.
For this purpose, it is urgent to provide a kind of disassembling fixtures to solve the above problems.
Utility model content
The purpose of this utility model is to provide a kind of disassembling fixtures, to solve to be easy to happen in rotor endcap disassembly process
The problem of damage.
For this purpose, the utility model uses following technical scheme:
A kind of disassembling fixture, comprising:
Support, for placing the rotor of end cap to be removed；
End cap gripping mechanism, including clamping bracket are provided with multiple snap-gauges on the clamping bracket and can drive multiple institutes
Snap-gauge clamping driving assembly close to each other or separate is stated, the plurality of snap-gauge is provided with arc groove, multiple cards
The end cap to be removed of rotor described in energy clamping after plate is close to each other；
Positioning plate, is set to the one end of the support far from the end cap gripping mechanism, and the positioning plate is used for described
Rotor is limited；
Separate driving assembly, connect with the end cap gripping mechanism, and it is described separate driving assembly include driving device and
Slide assemblies, the driving device can make the end cap gripping mechanism mobile towards the direction far from the support.
Preferably, multiple snap-gauges include the first snap-gauge and the second snap-gauge being oppositely arranged, first snap-gauge and
Second snap-gauge is provided with half slot, first snap-gauge and second snap-gauge it is close to each other after can form circular trough.
Preferably, the clamping driving assembly includes servo motor, the driving end of the servo motor is connected with screw rod,
The screw rod is provided with opposite the first screw rod section and the second screw rod section of the hand of spiral；First snap-gauge and second snap-gauge
On be provided with feed screw nut, one of them described feed screw nut is threadedly coupled with the first screw rod section, another described silk
Stem nut is threadedly coupled with the second screw rod section.
Preferably, the end cap gripping mechanism further includes guidance set, the clamping driving assembly is set to described
One end of one snap-gauge and second snap-gauge, the guidance set are set to the another of first snap-gauge and second snap-gauge
End；
The guidance set includes the sliding block for being parallel to the guide rail of the screw rod and being adapted to the guide rail, the guide rail
It is set on the clamping bracket, first snap-gauge and second snap-gauge are provided with the sliding block.
Preferably, the driving device is driving cylinder, the driving cylinder is set to the clamping branch by mounting bracket
Side of the frame far from the support, and the telescopic end of the driving cylinder can be abutted with the shaft end of the rotor on the support.
Preferably, the mounting bracket includes sequentially connected installation pedestal, mounting post and mounting plate, the installation base
Seat is connect with the clamping bracket, and the mounting plate connects the cylinder body of the driving cylinder.
Preferably, the installation pedestal includes two installation frames disposed in parallel, the C-shaped knot of installation frame
Structure, including the first connecting plate and positioned at it is described first connection board ends the second connecting plate, first connecting plate with it is described
Mounting post connection, second connecting plate are connect with the clamping bracket, and the distance of two installation frames is less than described
The outer diameter of end cap.
Preferably, the disassembling fixture includes locking device, the locking device can lock the clamping bracket, and institute
It states locking device and the clamping driving assembly is connect with controller communication.
Preferably, being provided with lifting device below the support.
Preferably, the disassembling fixture further includes workbench, the support, the end cap gripping mechanism and described tear open
It is all set on the workbench from driving assembly, and the bottom surface of the workbench is provided with multiple levelling shoes.
The utility model has the beneficial effects that
The utility model is by being provided with multiple snap-gauges of arc groove, so that can be formed after multiple snap-gauges are close suitable with end cap
The circular trough matched, so that end cap, when separating, snap-gauge applies uniform power to end cap, so that end cap is steadily split
From；The disassembly mode damage and Three-claw pull-horse caused by end cap for solving induction heater is uneven to end cap applied force,
The problem of causing end cap to be pulled.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the rotor of the end cap to be removed in the utility model embodiment；
Fig. 2 is the structural schematic diagram at the first visual angle of the disassembling fixture in the utility model embodiment；
Fig. 3 is the structural schematic diagram at the second visual angle of the disassembling fixture in the utility model embodiment；
Fig. 4 is enlarged diagram at A in Fig. 3；
Fig. 5 is the structural schematic diagram of the disassembling fixture for being mounted with rotor in the utility model embodiment.
In figure:
100, rotor；200, end cap；
1, workbench；11, levelling shoe；
2, support；21, stabilizer blade pillar；22, supporting plate；23, positioning plate；24, support substrate；25, lifting lug；
3, end cap gripping mechanism；31, clamping bracket；32, the first snap-gauge；33, the second snap-gauge；34, servo motor；35, silk
Bar；36, guide rail；37, sliding block；
4, driving assembly is separated；41, driving cylinder；42, slide assemblies；421, sliding rail is separated；422, slide plate；423, it shakes hands；
43, mounting bracket；431, installation frame；4311, the first connecting plate；4312, the second connecting plate；432, mounting post；433, it installs
Plate；
5, locking device.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer,
It is described in further detail below in conjunction with technical solution of the attached drawing to the utility model embodiment, it is clear that described reality
Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention,
It is practical new to belong to this for those skilled in the art's every other embodiment obtained without creative efforts
The range of type protection.Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
The present embodiment discloses a kind of disassembling fixture, as shown in Figures 2 and 3.The disassembling fixture includes for placing end to be removed
The support 2 of the rotor 100 of lid 200, end cap gripping mechanism 3 and driving assembly 4 is separated, also, support 2 is far from end cap gripping mechanism
3 one end is provided with positioning plate 23, for limiting to rotor 100.Wherein, end cap gripping mechanism 3 includes clamping bracket 31,
The clamping driving assembly for being provided with multiple snap-gauges on clamping bracket 31 and multiple snap-gauges capable of being driven close to each other or separate, wherein more
A snap-gauge is provided with arc groove, the end cap 200 to be removed of energy clamping rotor 100 after multiple snap-gauges are close to each other；Separate drive
Dynamic component 4 is connect with end cap gripping mechanism 3, and separating driving assembly 4 includes driving device and slide assemblies 42, driving device energy
Keep end cap gripping mechanism 3 mobile towards the direction far from support 2.By being provided with multiple snap-gauges of arc groove, so that multiple snap-gauges
The circular trough being adapted to end cap 200 can be formed after, so that end cap 200, when separating, snap-gauge applies to end cap 200
Uniform power, so that end cap 200 is steadily detached；The disassembly mode of induction heater is solved to caused by end cap 200
The problem of damage and Three-claw pull-horse are uneven to 200 applied force of end cap, and end cap 200 is caused to be pulled.
Specifically, separating the driving device in driving assembly 4 is driving cylinder 41, the telescopic end of driving cylinder 41 referring to Fig. 3
It can be abutted with 100 shaft end of rotor on support 2.After the telescopic end of driving cylinder 41 is abutted with 100 shaft end of rotor, driving cylinder 41
Telescopic end constantly stretches out, and rotor 100 remains stationary on support 2, and the clamping bracket 31 connecting with driving cylinder 41 is by anti-
To active force, clamping end cap 200 is mobile away from the direction of rotor 100 under the action of slide assemblies 42, thus by rotor
End cap 200 to be removed is removed on 100.In other embodiments, driving device can select any straight-line motion mechanism.
Also, slide assemblies 42 include it is parallel with 41 telescopic end of driving cylinder separate sliding rail 421, and with separate sliding rail
421 adaptations separate sliding block, separate sliding block and are set on clamping bracket 31.In this present embodiment, the lower end of clamping bracket 31 is set
It is equipped with slide plate 422, slide plate 422 is provided at least two along the direction for separating sliding rail 421 and separates sliding block, can guarantee end cap in this way
The stability of gripping mechanism 3.In addition, slide assemblies 42, which include two, parallel and symmetrical is set to tearing open for 31 two sides of clamping bracket
From sliding rail 421, setting in this way can guarantee that clamping bracket 31 can avoid sending out in sliding process along 421 smooth sliding of sliding rail is separated
Raw inclination.
Further, referring to Fig. 2, multiple snap-gauges include the first snap-gauge 32 and the second snap-gauge 33 being oppositely arranged, the first card
Plate 32 and the second snap-gauge 33 are provided with half slot, the first snap-gauge 32 and the second snap-gauge 33 it is close to each other after can form circular trough.
In this present embodiment, arc groove is stepped groove, is adapted with the shape of end cap 200.In other embodiments, multiple snap-gauge packets
It includes in 120 degree of three snap-gauges being circumferentially arranged, or includes in 90 degree of four snap-gauges being circumferentially arranged.
Specifically, clamping driving assembly includes servo motor 34, and the driving end of servo motor 34 is connected with screw rod 35, screw rod
35 are provided with the hand of spiral opposite the first screw rod section and the second screw rod section；It is respectively provided on first snap-gauge 32 and the second snap-gauge 33
There is feed screw nut, one of feed screw nut is threadedly coupled with the first screw rod section, another feed screw nut and the second screw rod section spiral shell
Line connection.In other embodiments, clamping driving assembly may include two servo motors 34, and two screw rods are arranged accordingly
35, it is respectively used to the movement of driving the first snap-gauge 32 and the second snap-gauge 33, such mode higher cost.
Further, referring to Fig. 3 and 4, end cap gripping mechanism 3 further includes guidance set, and clamping driving assembly is set to the
One end of one snap-gauge 32 and the second snap-gauge 33, guidance set are set to the other end of the first snap-gauge 32 and the second snap-gauge 33；Guiding
Component includes the sliding block 37 for being parallel to the guide rail 36 of screw rod 35 and being adapted to guide rail 36, and guide rail 36 is set to clamping bracket 31
On, the first snap-gauge 32 and the second snap-gauge 33 are provided with sliding block 37.In this present embodiment, clamping bracket 31 is rectangular frame, card
The servo motor 34 and screw rod 35 of tight driving assembly are all set in the top of clamping bracket 31, and the guide rail 36 of guidance set is set to
The lower section of clamping bracket 31 is arranged under the premise of not influencing snap-gauge clamping end cap 200, in this way so that the first snap-gauge 32 and second
Snap-gauge 33 is whole can be close to each other or separate under the action of clamping driving assembly.
Specifically, referring to Fig. 3, driving cylinder 41 is set to side of the clamping bracket 31 far from support 2 by mounting bracket 43,
And the telescopic end of driving cylinder 41 can be abutted with 100 shaft end of rotor on support 2.Mounting bracket 43 includes sequentially connected installation base
Seat, mounting post 432 and mounting plate 433, installation pedestal are connect with clamping bracket 31, and mounting plate 433 connects the cylinder body of driving cylinder 41.
Installation pedestal includes two installation frames 431 disposed in parallel, the C-shaped structure of installation frame 431, including the first connecting plate 4311
And the second connecting plate 4312 positioned at 4311 both ends of the first connecting plate, the first connecting plate 4311 are connect with mounting post 432, second
Connecting plate 4312 is connect with clamping bracket 31, and the distance of two installation frames 431 is less than the outer diameter of end cap 200.It sets in this way
It sets, enables what the end cap after separating 200 dropped to that the installation frames 431 of two c-type structures formed to allow in bit space, avoid
End cap 200 directly drops on ground or workbench the phenomenon that causing end cap 200 or workbench to damage.
Further, referring to Fig. 2, support 2 includes branch seat strut 21 and the blade assemblies connecting with branch seat strut 21 positioning
Plate 23 is set to the one end of blade assemblies far from end cap gripping mechanism 3, and blade assemblies include supporting plate 22 that is symmetrical and being obliquely installed,
The placement that can adapt to the rotor 100 of different-diameter in this way, improves the versatility of support 2.It is preferred that being provided with below support 2
Lifting device, can be with the telescopic end accurate contraposition of driving cylinder 41 convenient for the shaft end of rotor 100.Wherein lifting device can be selected
Electric up-down feed screw nut.Certainly, support 2 can be not provided with lifting device, and support substrate is arranged in the lower section of branch seat strut 21
24, lifting lug 25 is arranged in support substrate 24, and different supports 2 is replaced according to different rotors 100.
Further, disassembling fixture further includes workbench 1, support 2, end cap gripping mechanism 3 and to separate driving assembly 4 equal
It is set on workbench 1, and the bottom surface of workbench 1 is provided with multiple levelling shoes 11, workbench 1 is convenient in setting in this way
Leveling so that the support 2 of the top of workbench 1, end cap gripping mechanism 3 and separate driving assembly 4 being capable of precise match.
Further, disassembling fixture includes locking device 5, locking device 5 can locking clamp locking bracket 31, wherein locking device
5 can be mechanical locking device or electrical locking device.The setting of locking device 5 is fixed convenient for installation of the rotor 100 on support 2
Position.Specifically, rotor 100 is placed on support 2 by lifting, the shaft end of rotor 100 and the telescopic end of driving cylinder 41 are in same
Axis, but rotor 100 is locked clamping bracket 31 by locking device 5, clamping bracket 31 is at this time along axial and unlocked
The telescopic end of stationary state, driving cylinder 41 abuts 100 shaft end of rotor, and rotor 100 is pushed to and the positioning plate on support 2
23 abut, and complete the axial restraint of rotor 100.At this point, it is preferred that be additionally provided with knob 423 on slide plate 422, shake hands 423 setting
Convenient for pushing end cap gripping mechanism 3 mobile, realization separates end cap 200 and end cap gripping mechanism 3 is pushed to locking device 5 before
It sets and is locked, and then drive rotor 100 is positioned.
Further, in this present embodiment, locking device 5 uses electromagnetic locking device, and locking device 5, separates driving
Component 4 and clamping driving assembly are connect with controller communication, and the successive movement of related device is then controlled by controller, real
The partial act automation for having showed disassembling fixture, improves the removal efficiency of end cap 200 and reduces the incidence of safety accident.
Fig. 1 is the structural schematic diagram of the rotor of the end cap to be removed in the present embodiment, and Fig. 5 is being mounted in the present embodiment
The disassembling fixture structural schematic diagram of rotor 100.Further, the workflow of the disassembling fixture of the present embodiment is as follows:
S1, check whether the mechanical structure of disassembling fixture and electrical component are normal, connect power supply by regulation after checking normally
And reliable ground；
S2, the rotor 100 of end cap 200 to be removed is lifted on support 2；
S3, it clamping bracket 31 is pushed to is contacted with locking device 5, and locked；
S4, locking device 5 send the signal to controller, and controller controls driving cylinder 41 and stretches out abutting 100 axis of rotor
End makes the other end of rotor 100 abut positioning plate 23 and completes positioning；
S5,100 positioning signal of rotor are sent to controller, and controller controls servo motor 34 and rotates, so that the first snap-gauge
32 and second snap-gauge 33 it is close to each other, complete end cap 200 clamping；
The clamping signal of S6, the first snap-gauge 32 and the second snap-gauge 33 are sent to controller, and it is disconnected that controller controls locking device 5
Electricity, 41 telescopic rod of driving cylinder continue to stretch out, and enable end cap gripping mechanism 3 by driving cylinder 41 and slide assemblies 42 towards remote
Direction from support 2 is mobile, final to realize that end cap 200 is separated with rotor 100.
Wherein, the clamping signal of 100 positioning signal of rotor and the first snap-gauge 32 and the second snap-gauge 33 can be in controller
The interior setting predetermined time, after driving cylinder 41 and 34 run duration of servo motor reach the predetermined time, controller is directly controlled
It acts in next step；First magnetic induction switch, the first snap-gauge 32 and the second snap-gauge can certainly be set on 2 positioning plate 23 of support
Second magnetic induction switch is set on 33；After rotor 100 and positioning plate 23 contact, the first magnetic induction switch, the first magnetic strength are triggered
Inductive switch sends a signal to controller；Correspondingly, the first snap-gauge 32 and the second snap-gauge 33 it is close and contact after trigger the second magnetic strength
Inductive switch, the second magnetic induction switch send a signal to controller after being triggered, controller controls in next step after being connected to corresponding signal
Movement.Those skilled in the art can be configured sender unit according to the actual situation, and details are not described herein.
Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (10)
1. a kind of disassembling fixture characterized by comprising
Support (2), for placing the rotor (100) of end cap to be removed (200)；
End cap gripping mechanism (3), including clamping bracket (31) are provided with multiple snap-gauges on the clamping bracket (31) and can drive
Multiple snap-gauges clamping driving assembly close to each other or separate, the plurality of snap-gauge is provided with arc groove, multiple
The end cap (200) to be removed of rotor (100) described in energy clamping after the snap-gauge is close to each other；
Positioning plate (23) is set to the one end of the support (2) far from the end cap gripping mechanism (3), the positioning plate (23)
For being limited to the rotor (100)；
Driving assembly (4) are separated, are connect with the end cap gripping mechanism (3), and described separate driving assembly (4) include driving dress
Setting can be such that the end cap gripping mechanism (3) moves towards the direction far from the support (2) with slide assemblies (42), the driving device
It is dynamic.
2. disassembling fixture according to claim 1, which is characterized in that multiple snap-gauges include the first card being oppositely arranged
Plate (32) and the second snap-gauge (33), first snap-gauge (32) and second snap-gauge (33) are provided with half slot, and described
Circular trough can be formed after one snap-gauge (32) and second snap-gauge (33) are close to each other.
3. disassembling fixture according to claim 2, which is characterized in that the clamping driving assembly includes servo motor
(34), the driving end of the servo motor (34) is connected with screw rod (35), and it is opposite that the screw rod (35) is provided with the hand of spiral
First screw rod section and the second screw rod section；It is provided with feed screw nut on first snap-gauge (32) and second snap-gauge (33),
One of them described feed screw nut is threadedly coupled with the first screw rod section, another described feed screw nut and second screw rod
Section is threadedly coupled.
4. disassembling fixture according to claim 3, which is characterized in that the end cap gripping mechanism (3) further includes guiding group
Part, the clamping driving assembly are set to one end of first snap-gauge (32) and second snap-gauge (33), the guiding group
Part is set to the other end of first snap-gauge (32) and second snap-gauge (33)；
The guidance set includes the sliding block for being parallel to the guide rail (36) of the screw rod (35) and being adapted to the guide rail (36)
(37), the guide rail (36) is set on the clamping bracket (31), first snap-gauge (32) and second snap-gauge (33)
It is provided with the sliding block (37).
5. disassembling fixture according to claim 1, which is characterized in that the driving device is driving cylinder (41), the drive
Dynamic cylinder (41) are set to side of the clamping bracket (31) far from the support (2), and the drive by mounting bracket (43)
The telescopic end of dynamic cylinder (41) can be abutted with the shaft end of the rotor (100) on the support (2).
6. disassembling fixture according to claim 5, which is characterized in that the mounting bracket (43) includes sequentially connected peace
Dress pedestal, mounting post (432) and mounting plate (433), the installation pedestal are connect with the clamping bracket (31), the mounting plate
(433) cylinder body of the driving cylinder (41) is connected.
7. disassembling fixture according to claim 6, which is characterized in that the installation pedestal includes two peaces disposed in parallel
Frame up frame (431), the C-shaped structure of the installation frame (431), including the first connecting plate (4311) and be located at it is described first connect
Second connecting plate (4312) at fishplate bar (4311) both ends, first connecting plate (4311) connect with the mounting post (432), institute
It states the second connecting plate (4312) to connect with the clamping bracket (31), and the distance of two installation frames (431) is less than institute
State the outer diameter of end cap (200).
8. disassembling fixture according to claim 1, which is characterized in that the disassembling fixture includes locking device (5), described
Locking device (5) can lock the clamping bracket (31), and the locking device (5) and the clamping driving assembly with control
Device communication connection.
9. disassembling fixture according to claim 1, which is characterized in that be provided with lifting device below the support (2).
10. disassembling fixture according to claim 1, which is characterized in that the disassembling fixture further includes workbench (1),
The support (2), the end cap gripping mechanism (3) and the driving assembly (4) of separating are all set in the workbench (1)
On, and the bottom surface of the workbench (1) is provided with multiple levelling shoes (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822145663.9U CN209239437U (en) | 2018-12-20 | 2018-12-20 | A kind of disassembling fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822145663.9U CN209239437U (en) | 2018-12-20 | 2018-12-20 | A kind of disassembling fixture |
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| Publication Number | Publication Date |
|---|---|
| CN209239437U true CN209239437U (en) | 2019-08-13 |
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ID=67533785
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| CN201822145663.9U Active CN209239437U (en) | 2018-12-20 | 2018-12-20 | A kind of disassembling fixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932391A (en) * | 2022-04-28 | 2022-08-23 | 华能新疆青河风力发电有限公司布尔津分公司 | Special device for dismounting bearing of generator |
-
2018
- 2018-12-20 CN CN201822145663.9U patent/CN209239437U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932391A (en) * | 2022-04-28 | 2022-08-23 | 华能新疆青河风力发电有限公司布尔津分公司 | Special device for dismounting bearing of generator |
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