CN110729859B - Disassembly-free motor bearing replacement process - Google Patents
Disassembly-free motor bearing replacement process Download PDFInfo
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- CN110729859B CN110729859B CN201911114013.0A CN201911114013A CN110729859B CN 110729859 B CN110729859 B CN 110729859B CN 201911114013 A CN201911114013 A CN 201911114013A CN 110729859 B CN110729859 B CN 110729859B
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- rotating shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/165—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
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- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a disassembly-free motor bearing replacement process, which comprises the following steps: the bottom of the rotor rotating shaft is supported and positioned by a first supporting piece and a second supporting piece at least two preset positions along the axial direction on the rotor rotating shaft; moving the second support piece to separate the second support piece from the support of the rotor rotating shaft, and pulling out the old bearing assembly to a position between the first support piece and the second support piece; moving the second support piece to support the rotor rotating shaft again, and simultaneously moving the first support piece to separate the first support piece from the support of the rotor rotating shaft so as to pull out the old bearing assembly from the outer end of the rotor rotating shaft; sliding the new bearing assembly into the rotor shaft from the outer end of the rotor shaft, moving the first support part to support the rotor shaft again, and moving the second support part to separate the rotor shaft from the support; and sliding the new bearing assembly to the installation position on the rotor rotating shaft along the axial direction. The motor bearing disassembly-free replacement method can realize disassembly-free replacement of the motor bearing, improve the replacement efficiency and avoid rotor displacement in the replacement process.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a disassembly-free motor bearing replacement process.
Background
With the high-speed development of rail transit, the operation and maintenance requirements and the technical level of rail vehicles are increasing day by day.
Traction motors are commonly used for power drive on electric locomotives of railway main lines, electric locomotives of industrial and mining, electric transmission internal combustion locomotives and various electric vehicles. The traction motor mainly comprises a rotor and a stator, and the operation principle of the traction motor is the same as that of a common motor. In order to ensure the smooth and unimpeded rotation of the rotor, a bearing is arranged on the rotor. The working state and the maintenance requirement of each part on the vehicle are different, and the rotor bearing is a core stressed part, so that the detection or the replacement is required within the specified time or kilometers in order to ensure the running safety of the vehicle and ensure the abnormal key of the overhauling and maintenance work of the bearing.
The structural arrangement of a conventional traction motor results in bearing disassembly, and the motor must be disassembled first to separate the stator and the rotor, and then the bearing is pulled out from the bearing chamber to complete the detection or replacement work. In the prior art, the motor is dropped to a vehicle and returned to a factory by a common method, a professional tool is adopted to disassemble the motor, the stator and the rotor are separated, and then the bearing is pulled out to be detected or replaced. The whole disassembly period is long, the process is complicated, a specific field and a special tool are needed, and the overhaul cost and the overhaul resource consumption are high. Especially when needing to disassemble trouble bearing, above-mentioned flow can't be simplified, leads to the time span of failure analysis solution very big, is unfavorable for the quick solution of problem and reduces the economic loss that the trouble leads to.
Current motor bearing is when the maintenance is changed, mostly need to disintegrate the motor, extracts motor rotor from the motor, later recycles specific device and pulls out the bearing, and the rethread frock is newly installed the new axle bearing to the pivot to put the rotor into the motor again, install the motor again. The whole replacement process is complex in operation and long in time consumption, and in the process of disassembling and reassembling the motor, the rotor rotating shaft is difficult to accurately reset to the axis position, so that the risk of motor damage caused by manual misoperation exists, and potential quality hazards are buried for safe operation of the motor.
Therefore, how to realize disassembly-free disassembly and replacement of the motor bearing, improve the disassembly and replacement efficiency, and avoid the displacement of the rotor in the disassembly and replacement process is a technical problem faced by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a disassembly-free motor bearing replacement process, which can realize disassembly-free replacement of a motor bearing, improve the replacement efficiency and avoid rotor displacement in the replacement process.
In order to solve the technical problem, the invention provides a disassembly-free motor bearing replacement process, which comprises the following steps:
the bottom of the rotor rotating shaft is supported and positioned by a first supporting piece and a second supporting piece at least two preset positions along the axial direction on the rotor rotating shaft, wherein the supporting position of the first supporting piece is positioned on the outer side of the second supporting piece in the axial direction;
moving the second support piece along a preset direction to separate the second support piece from the support of the rotor rotating shaft, and axially pulling out an old bearing assembly arranged on the rotor rotating shaft to a position between the axial positions of the first support piece and the second support piece;
moving the second supporting piece along a preset direction to enable the second supporting piece to support the rotor rotating shaft at a preset position again, and simultaneously moving the first supporting piece along the preset direction to enable the first supporting piece to be separated from the support of the rotor rotating shaft, so that the old bearing assembly is pulled out from the outer end of the rotor rotating shaft along the axial direction;
sliding a new bearing assembly into a position between the axial positions of the first supporting piece and the second supporting piece from the outer end of the rotor rotating shaft along the axial direction, moving the first supporting piece along a preset direction to enable the first supporting piece to support the rotor rotating shaft at a preset position again, and moving the second supporting piece along the preset direction to enable the second supporting piece to be separated from the support of the rotor rotating shaft;
and sliding the new bearing assembly to a mounting position on the rotor rotating shaft along the axial direction.
Preferably, before the supporting and positioning of the rotor rotating shaft, the method further comprises:
and a process shaft for extending the operation space is axially connected to the outer end of the rotor rotating shaft.
Preferably, the process shaft is connected to the outer end of the rotor rotating shaft, and specifically includes:
and a threaded hole is formed in the end face of the outer end of the rotor rotating shaft along the axis position, a threaded column is arranged on the end face of the inner end of the process shaft along the axis position, and the process shaft and the rotor rotating shaft are detachably connected through the matching of the threaded hole and the threaded column.
Preferably, when supporting and positioning the rotor rotating shaft, the method specifically includes:
the bottom of the outer end of the process shaft is supported by the first supporting piece, and the bottom of the outer end of the rotor rotating shaft is supported by the second supporting piece.
Preferably, moving the first support or the second support along a preset direction specifically includes:
and moving the first support member and the second support member along the vertical direction to keep a preset distance between the first support member and the corresponding process shaft and the rotor rotating shaft so as to reserve a sliding space of the old bearing assembly or the new bearing assembly.
Preferably, when the old bearing assembly is pulled out or slid into the new bearing assembly, a force is applied to an outer end face of the old bearing assembly or the new bearing assembly in an axial direction by a drive system.
Preferably, after sliding the new bearing assembly axially to the installation position on the rotor rotating shaft, the method further comprises:
and moving the first support piece along a preset direction to separate the first support piece from the support of the process shaft, and detaching the process shaft from the outer end of the rotor rotating shaft.
The disassembly-free motor bearing replacement process mainly comprises five steps, wherein in the first step, at least two preset positions are determined on the rotor rotating shaft along the axial length direction of the rotor rotating shaft, and the bottom of the rotor rotating shaft is supported by the first supporting piece and the second supporting piece at each preset position so as to position the rotor rotating shaft through the common support of the plurality of supporting pieces. Typically, the first support member is supported outwardly and the second support member is supported inwardly. In the second step, after the rotor rotating shaft is supported and positioned, the bearing can be removed and replaced. The second support member is first moved to be temporarily removed from supporting the rotor shaft, but is still supported by the first support member, and is kept in position, and then the old bearing assembly (including the old bearing and the old bearing seat) is pulled out from the mounting position until being pulled out between the first support member and the second support member. Since the first support member remains supported at this time, it is necessary to move the first support member away from the support of the rotor shaft and slide the old bearing assembly outwardly away from the outer end of the rotor shaft in the third step. Of course, before withdrawing the first support, it is necessary to first move the second support to re-establish the supporting position of the rotor shaft. In the fourth step, a new bearing assembly (including a new bearing and a new bearing seat) is firstly slid in from the outer end of the rotor rotating shaft, and because the second supporting piece is kept supporting at the moment, the new bearing assembly can be firstly slid between the first supporting piece and the second supporting piece, then the first supporting piece is firstly moved to enable the new supporting piece to form the supporting and positioning for the rotor rotating shaft again, then the second supporting piece is moved to enable the new supporting piece to withdraw from the supporting for the rotor rotating shaft, and then the new bearing assembly can be slid to the mounting position of the inner end of the rotor rotating shaft in the fifth step, so that the motor bearing replacement operation is completed. In summary, in the disassembly-free motor bearing replacement process provided by the invention, the first support piece and the second support piece support and position the rotor rotating shaft, and the first support piece, the second support piece and the rotor rotating shaft are used for supporting and withdrawing in turn, so that the removal of the old bearing assembly and the installation of the new bearing assembly are stably and orderly completed, and the rotor rotating shaft is always supported and positioned in the whole disassembly and replacement process, thereby avoiding the displacement of the rotor in the disassembly and replacement process, ensuring the disassembly and replacement precision.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a process flow diagram of one embodiment of the present invention.
Fig. 2 is a schematic diagram of a process shaft installation configuration in a process flow.
Fig. 3 is a schematic structural diagram illustrating a supporting and positioning of a rotor shaft by a first supporting member and a second supporting member in a process flow.
Fig. 4 is a schematic structural diagram of the old bearing assembly pulled out to the position between the first support and the second support in the process flow.
FIG. 5 is a schematic view of the structure of the old bearing assembly pulled out from the outer end of the rotor shaft in the process flow.
FIG. 6 is a schematic view of a new bearing assembly slid in from the outer end of the rotor shaft in the process flow.
Among them, in fig. 2 to 6:
an old bearing assembly-a, a new bearing assembly-b;
a rotor rotating shaft-1, a process shaft-2, a first supporting piece-3 and a second supporting piece-4;
a threaded hole-101 and a threaded post-201.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a process flow diagram of an embodiment of the present invention.
In a specific embodiment provided by the invention, the process for dismounting and replacing the motor bearing without disassembly mainly comprises five steps, which are respectively as follows:
s1, supporting and positioning the bottom of the rotor shaft 1 at least two preset positions along the axial direction by the first supporting member 3 and the second supporting member 4, respectively, wherein the supporting position of the first supporting member 3 is located on the outer side of the second supporting member 4 in the axial direction;
s2, moving the second support 4 along the preset direction and separating the second support from the support of the rotor rotating shaft 1, and axially pulling out the old bearing assembly a mounted on the rotor rotating shaft 1 to a position between the axial positions of the first support 3 and the second support 4;
s3, moving the second supporting member 4 along the preset direction and making it support the rotor spindle 1 at the preset position again, and moving the first supporting member 3 along the preset direction and making it release from the support of the rotor spindle 1, and pulling out the old bearing assembly a from the outer end of the rotor spindle 1 along the axial direction;
s4, sliding the new bearing assembly b into the space between the axial positions of the first support member 3 and the second support member 4 from the outer end of the rotor rotating shaft 1 along the axial direction, moving the first support member 3 along the preset direction and enabling the first support member to support the rotor rotating shaft 1 at the preset position again, and then moving the second support member 4 along the preset direction and enabling the second support member to be separated from the support of the rotor rotating shaft 1;
and S5, sliding the new bearing assembly b to the installation position on the rotor rotating shaft 1 along the axial direction.
In step S1, at least two preset positions are determined on the rotor shaft 1 along the axial length direction thereof, and the bottom of the rotor shaft 1 is supported by the first support 3 and the second support 4 at each preset position, so as to position the rotor shaft 1 by the common support of the plurality of supports. Typically, the first support 3 is supported outwardly and the second support 4 is supported inwardly.
In step S2, after the rotor shaft 1 is supported and positioned, the bearing replacement can be started. The second support 4 is first moved to be temporarily withdrawn from supporting the rotor shaft 1, but still supported by the first support 3, and is kept in position, and then the old bearing assembly a (including the old bearing and the old bearing housing) is pulled out from the mounting position until being pulled out between the first support 3 and the second support 4.
Since the first support 3 is still supported at this time, in step S3, it is necessary to move the first support 3 away from the support of the rotor shaft 1 and slide the old bearing assembly a outward to be disengaged from the outer end of the rotor shaft 1. Of course, before withdrawing the first support 3, it is necessary to first move the second support 4 to re-establish the supporting position of the rotor shaft 1.
In step S4, firstly, the new bearing assembly b (including the new bearing and the new bearing seat) is slid in from the outer end of the rotor shaft 1, because the second supporting member 4 is kept supporting, the new bearing assembly b can be slid between the first supporting member 3 and the second supporting member 4, then the first supporting member 3 is moved to form the supporting position for the rotor shaft 1 again, then the second supporting member 4 is moved to remove the supporting position for the rotor shaft 1, and then the new bearing assembly b can be slid to the mounting position of the inner end of the rotor shaft 1 in step S5, thereby completing the motor bearing replacement operation.
As shown in fig. 2 to 6, fig. 2 is a schematic structural diagram of mounting a process shaft 2 in a process flow, fig. 3 is a schematic structural diagram of supporting and positioning a rotor shaft 1 by a first supporting member 3 and a second supporting member 4 in the process flow, fig. 4 is a schematic structural diagram of pulling out an old bearing assembly a to a position between the first supporting member 3 and the second supporting member 4 in the process flow, fig. 5 is a schematic structural diagram of pulling out the old bearing assembly a from an outer end of the rotor shaft 1 in the process flow, and fig. 6 is a schematic structural diagram of sliding in a new bearing assembly b from the outer end of the rotor shaft 1 in the process flow.
In summary, in the disassembly-free motor bearing replacement process provided by this embodiment, the first support member 3 and the second support member 4 support and position the rotor shaft 1, and the first support member 3 and the second support member 4 support and withdraw from the rotor shaft 1 in turn, so as to stably and orderly complete the removal of the old bearing assembly a and the installation of the new bearing assembly b, and in the whole disassembly and replacement process, the rotor shaft 1 is always supported and positioned, thereby avoiding the rotor from shifting in the disassembly and replacement process, and ensuring the disassembly and replacement precision.
In a preferred embodiment, considering a partial size or dimension of the motor, the axial extension of the rotor shaft 1 is short, and it is difficult to support and position the rotor shaft 1 by a plurality of supporting members, for which, in this embodiment, the process shaft 2 is first connected to the outer end of the rotor shaft 1 before the rotor shaft 1 is supported and positioned.
Specifically, a threaded hole 101 may be formed in an outer end surface of the rotor spindle 1 along an axial position, and a threaded post 201 may be formed in an inner end surface of the process spindle 2 along the axial position, where the threaded post 201 may be in threaded connection with the threaded hole 101. Therefore, the process shaft 2 can be installed on the rotor rotating shaft 1 through the matching connection of the threaded column 201 and the threaded hole 101, and the process shaft 2 can be conveniently disassembled from the rotor rotating shaft 1 through screwing. Here, preferably, the axial length of the process shaft 2 may be equal to the overhanging length of the rotor shaft 1, which corresponds to extending the length of the rotor shaft 1 outward by a factor of two, so that each support has sufficient support position and movement space. Meanwhile, the diameter of the process shaft 2 may be equal to the diameter of the rotor shaft 1.
Of course, in the case that the extension length of the rotor shaft 1 is large enough, the process shaft 2 does not need to be additionally arranged, and the first support 3 and the second support 4 can be respectively supported at different positions on the rotor shaft 1 along the axial length. In the case of the rotor shaft 1 with the process shaft 2 connected thereto, the first support member 3 may be supported at the outer end bottom of the process shaft 2, and the second support member 4 may be supported at the outer end bottom of the rotor shaft 1.
Of course, the connection mode of the process shaft 2 and the rotor spindle 1 is not limited to the threaded hole 101 and the threaded post 201, and other modes such as forming a clamping groove on the outer end face of the rotor spindle 1 and forming a clamping block on the inner end face of the process shaft 2 can also achieve detachable connection between the process shaft 2 and the rotor spindle 1 by using the clamping groove and the clamping block to form clamping.
In addition, when moving the first support 3 or the second support 4, in particular, considering that the first support 3 and the second support 4 are supported on the bottom surface of the process shaft 2 or the rotor rotation shaft 1 from the bottom, the first support 3 or the second support 4 can be moved in the vertical direction, so that the first support 3 or the second support 4 can be quickly separated from the support of the process shaft 2 or the rotor rotation shaft 1. Of course, since the first supporting member 3 and the second supporting member 4 are generally disposed on the ground or on the working surface, the first supporting member 3 and the second supporting member 4 can be respectively installed on the movable lifting plate by using a power mechanism such as a hydraulic or pneumatic mechanism, so as to conveniently drive the first supporting member 3 and the second supporting member 4 to vertically lift. In addition, in order to ensure the supporting and positioning accuracy of the rotor rotating shaft 1, the axis position of the rotor rotating shaft 1 can be detected at any time through a sensor in the whole motor bearing dismounting and replacing operation process, so that the lifting height of the movable lifting plate can be accurately adjusted through a feedback value, and the phenomenon that the rotor rotating shaft 1 is supported too high or too low to cause displacement is avoided.
Further, in the process of moving the first support 3 and the second support 4 in the vertical direction, the first support 3 and the second support 4 generally need to be withdrawn outward by a distance large enough to maintain a sliding space between the first support 3 and the process shaft 2 and between the second support 4 and the rotor shaft 1 for the old bearing assembly a and the new bearing assembly b to pass through smoothly.
In the process of dismounting and replacing the motor bearing, in order to ensure that the old bearing assembly a and the new bearing assembly b can stably slide along the axial direction of the rotor rotating shaft 1 or the process shaft 2, in the embodiment, the output end of the driving system is connected to the outer end faces of the old bearing assembly a and the new bearing assembly b, and meanwhile, pressure or thrust is applied along the axial direction of the rotor rotating shaft 1 or the process shaft 2.
In addition, after the new bearing assembly b slides to the installation position of the rotor rotating shaft 1 and the bearing is disassembled and updated, the movable lifting plate can descend along the vertical direction to ensure that the first supporting piece 3 is separated from the support of the process shaft 2, then the process shaft 2 is screwed in the circumferential direction, and the process shaft 2 is disassembled from the outer end of the rotor rotating shaft 1 for the next use.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The disassembly-free motor bearing replacement process is characterized by comprising the following steps:
the bottom of the rotor rotating shaft is supported and positioned by a first supporting piece and a second supporting piece at least two preset positions along the axial direction on the rotor rotating shaft, wherein the supporting position of the first supporting piece is positioned on the outer side of the second supporting piece in the axial direction;
moving the second support piece along a preset direction to separate the second support piece from the support of the rotor rotating shaft, and axially pulling out an old bearing assembly arranged on the rotor rotating shaft to a position between the axial positions of the first support piece and the second support piece;
moving the second supporting piece along a preset direction to enable the second supporting piece to support the rotor rotating shaft at a preset position again, and simultaneously moving the first supporting piece along the preset direction to enable the first supporting piece to be separated from the support of the rotor rotating shaft, so that the old bearing assembly is pulled out from the outer end of the rotor rotating shaft along the axial direction;
sliding a new bearing assembly into a position between the axial positions of the first supporting piece and the second supporting piece from the outer end of the rotor rotating shaft along the axial direction, moving the first supporting piece along a preset direction to enable the first supporting piece to support the rotor rotating shaft at a preset position again, and moving the second supporting piece along the preset direction to enable the second supporting piece to be separated from the support of the rotor rotating shaft;
and sliding the new bearing assembly to a mounting position on the rotor rotating shaft along the axial direction.
2. The process for dismounting and replacing motor bearings without disassembly as claimed in claim 1, further comprising, before supporting and positioning the rotor shaft:
and a process shaft for extending the operation space is axially connected to the outer end of the rotor rotating shaft.
3. The disassembly-free motor bearing replacement process as claimed in claim 2, wherein a process shaft is connected to the outer end of the rotor rotating shaft, and the process shaft comprises:
and a threaded hole is formed in the end face of the outer end of the rotor rotating shaft along the axis position, a threaded column is arranged on the end face of the inner end of the process shaft along the axis position, and the process shaft and the rotor rotating shaft are detachably connected through the matching of the threaded hole and the threaded column.
4. The disassembly-free motor bearing replacing process as claimed in claim 3, wherein when supporting and positioning the rotor rotating shaft, the disassembly-free motor bearing replacing process specifically comprises:
the bottom of the outer end of the process shaft is supported by the first supporting piece, and the bottom of the outer end of the rotor rotating shaft is supported by the second supporting piece.
5. The disassembly-free motor bearing replacing process as claimed in claim 4, wherein when the first supporting member and the second supporting member are moved, the first supporting member and the second supporting member are respectively installed by a power mechanism through a movable lifting plate, and are respectively driven to vertically lift.
6. The disassembly-free motor bearing process of claim 5, wherein when the old bearing assembly is pulled out or slid into the new bearing assembly, a force is applied to the outer end face of the old bearing assembly or the new bearing assembly in an axial direction by a driving system.
7. The disassembly-free motor bearing replacing process as claimed in claim 6, wherein after the new bearing assembly is axially slid to the installation position on the rotor shaft, the process further comprises:
and moving the first support piece along a preset direction to separate the first support piece from the support of the process shaft, and detaching the process shaft from the outer end of the rotor rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114013.0A CN110729859B (en) | 2019-11-14 | 2019-11-14 | Disassembly-free motor bearing replacement process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114013.0A CN110729859B (en) | 2019-11-14 | 2019-11-14 | Disassembly-free motor bearing replacement process |
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| CN110729859A CN110729859A (en) | 2020-01-24 |
| CN110729859B true CN110729859B (en) | 2021-06-29 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009225532A (en) * | 2008-03-14 | 2009-10-01 | Toyo Electric Mfg Co Ltd | Replacement method for bearing portion of main motor for vehicles |
| CN202309427U (en) * | 2011-10-28 | 2012-07-04 | 濮阳中石集团有限公司 | Device for dismounting motor bearings |
| CN203261200U (en) * | 2013-04-27 | 2013-10-30 | 上海福源智业投资集团有限公司 | Nuclear power motor rotor mounting dismounting system |
| CN203636762U (en) * | 2013-12-19 | 2014-06-11 | 上海宝钢汽车检测修复有限公司 | Quick-fetching device of damaged bearing |
| CN207124537U (en) * | 2017-05-02 | 2018-03-20 | 石云尧 | A kind of air conditioner motor shaft bearing provision for disengagement |
| CN207339601U (en) * | 2017-09-25 | 2018-05-08 | 上海宝钢工业技术服务有限公司 | The disassembling fixture of motor shaft module |
| CN108092476B (en) * | 2017-12-21 | 2019-06-04 | 重庆洛昂机械有限公司 | Bearing of motor attaching/detaching apparatus |
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