CN110429743B - Motor and bearing replacement method thereof - Google Patents
Motor and bearing replacement method thereof Download PDFInfo
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- CN110429743B CN110429743B CN201910787425.4A CN201910787425A CN110429743B CN 110429743 B CN110429743 B CN 110429743B CN 201910787425 A CN201910787425 A CN 201910787425A CN 110429743 B CN110429743 B CN 110429743B
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- bearing
- end cover
- top seat
- rotating shaft
- wall
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- 238000000034 method Methods 0.000 title claims description 11
- 238000010030 laminating Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 description 4
- 241000237503 Pectinidae Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000020637 scallop Nutrition 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
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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
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1672—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
本发明公开了一种电机，包括前后间隔分布的端盖、穿设在两个端盖上的转轴和连接两个端盖的机壳，转轴的外壁贴合设转子，机壳的内壁贴合设定子，转子外缘和定子内缘之间形成电机气隙，端盖包括第一端盖和第二端盖，第一端盖位于第二端盖的内侧，第二端盖和转轴之间通过轴承连接，转轴的外壁贴合设轴承顶座，轴承顶座位于第一端盖和第二端盖之间，轴承顶座的一端抵住转轴的台阶面，轴承顶座的另一端抵住轴承的内圈，第二端盖设与第一端盖水平相对的第二端盖顶出孔，轴承顶座设与第一端盖水平相对的轴承顶座顶出孔。本发明不需要完全拆下转子部分就可以进行更换前后轴承，不会造成转子部分的损伤。
The invention discloses a motor, comprising end covers distributed at intervals in the front and rear, a rotating shaft passing through the two end covers and a casing connecting the two end covers. The outer wall of the rotating shaft is fitted with a rotor, and the inner wall of the casing is fitted with a rotor. The motor air gap is formed between the outer edge of the rotor and the inner edge of the stator. The end cover includes a first end cover and a second end cover. The first end cover is located inside the second end cover, and the second end cover and the rotating shaft are located between the two end covers. They are connected by bearings. The outer wall of the rotating shaft is fitted with a bearing top seat. The bearing top seat is located between the first end cover and the second end cover. One end of the bearing top seat is against the stepped surface of the rotating shaft, and the other end of the bearing top seat is against The second end cover is provided with a second end cover ejection hole horizontally opposite to the first end cover, and the bearing top seat is provided with a bearing top seat ejection hole horizontally opposite to the first end cover. In the present invention, the front and rear bearings can be replaced without completely disassembling the rotor part without causing damage to the rotor part.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor and a bearing replacement method thereof.
Background
The long-time operation in-process of motor, because the bearing of the factor motor such as generate heat damages easily, all tear down the back with the rotor part (including pivot, rotor and bearing) of motor whole and utilize the three-jaw to draw the horse to pull down the bearing that damages among the prior art, then match rotor part after changing new bearing again, this process is fairly complicated, wastes time and energy, causes the damage of rotor part easily when tearing down rotor part moreover, the urgent need for improvement.
Disclosure of Invention
The present invention has been made to overcome the above-mentioned disadvantages of the prior art, and an object of the present invention is to provide a motor and a bearing replacement method thereof, in which front and rear bearings can be replaced without completely removing a rotor portion, and damage to the rotor portion is not caused.
The scheme for solving the technical problems is as follows:
a motor comprises end covers which are distributed at intervals in the front and back, a rotating shaft which is arranged on the two end covers in a penetrating way and a shell which is connected with the two end covers, the outer wall of the rotating shaft is attached with a rotor, the inner wall of the shell is attached with a stator, a motor air gap is formed between the outer edge of the rotor and the inner edge of the stator, the end cover comprises a first end cover and a second end cover which are detachably connected, the first end cover is positioned at the inner side of the second end cover, the second end cover is connected with the rotating shaft through a bearing, the outer wall of the rotating shaft is provided with a bearing top seat in a fitting manner, the bearing top seat is positioned between the first end cover and the second end cover, one end of the bearing top seat is propped against the step surface of the rotating shaft, the other end of the bearing top seat is propped against the inner ring of the bearing, the second end cover is provided with a second end cover ejection hole horizontally opposite to the first end cover, and the bearing top seat is provided with a bearing top seat ejection hole horizontally opposite to the first end cover.
The bearing footstock is established the lantern ring and the fan-shaped piece of circumference equipartition in the lantern ring outer fringe at the pivot outer wall including the laminating, bearing footstock ejector pin level runs through establishes on the fan-shaped piece, the fan-shaped piece is established at the outer fringe inboard of the lantern ring.
The outer edge of the fan-shaped sheet is provided with a convex part protruding inwards, and the bearing top seat ejection hole horizontally penetrates through the convex part.
The inner wall of the first end cover and the outer wall of the rotating shaft are both provided with plastic sliding bearings in an interference fit mode, and the two plastic sliding bearings are in clearance fit.
The outer end of the outer ring of the bearing at the front end is abutted to the second end cover through a wave-shaped elastic washer, and the outer end of the inner ring of the bearing at the rear end is abutted to the second end cover through a snap ring.
A gap is formed between the inner edge of the second end cover positioned at the front end and the outer wall of the rotating shaft, an air outlet hole is formed in the second end cover positioned at the rear end, and the air outlet hole is communicated with the outer end of the bearing on the side corresponding to the air outlet hole.
The invention also discloses a bearing replacing method of the motor, which comprises the following steps:
a. when the bearing on one side is damaged, screwing the bolt into the second end cover ejection hole on the corresponding side to eject the second end cover on the side, and then taking down the wave-shaped elastic washer or the snap ring on the corresponding side;
b. screwing the bolt into the bearing top seat ejection hole on the corresponding side so that the bearing top seat on the side and the bearing are ejected out together;
c. and (4) installing a bearing top seat, press-fitting a new bearing, installing a wavy elastic washer or snap ring on the corresponding side, and then installing a second end cover on the corresponding side.
And c, pressing a new bearing on one side to abut against the end surface of the other side of the rotating shaft.
The invention has the following outstanding effects: the front bearing and the rear bearing can be replaced without completely disassembling the rotor part, and the rotor part cannot be damaged; when the motor runs, the bearing top seat rotates along with the rotating shaft, the fan is used, the heat of the bearing can be dissipated, and the service life of the bearing is prolonged.
Drawings
Fig. 1 is a schematic structural view of a motor of the present invention;
fig. 2 is a perspective view of the bearing top mount of the present invention.
In the figure: the motor comprises a rotating shaft 1, a rotor 2, a stator 3, a machine shell 4, an end cover 5, a first end cover 51, a second end cover 52, a plastic sliding bearing 53, a second end cover ejecting hole 54, an air outlet hole 55, a bearing ejecting seat 6, a lantern ring 61, a fan-shaped sheet 62, a bearing ejecting seat ejecting hole 63, a convex part 64, a bearing 7, a wave-shaped elastic gasket 8 and a clamping ring 9.
Detailed Description
Example (b):
as shown in fig. 1 and 2, a motor includes end covers 5 arranged at intervals in a front-back direction, a rotating shaft 1 penetrating through the two end covers 5, and a casing 4 connecting the two end covers 5, wherein a rotor 2 is attached to an outer wall of the rotating shaft 1, a stator 3 is attached to an inner wall of the casing 4, and a motor air gap is formed between an outer edge of the rotor 2 and an inner edge of the stator 3, which are the prior art of motors and will not be described in detail herein.
The end cover 5 comprises a first end cover 51 and a second end cover 52 which are detachably connected, the first end cover 51 is positioned at the inner side of the second end cover 52, and the first end cover 51 and the second end cover 52 are connected through screws.
The second end cover 52 is connected with the rotating shaft 1 through a bearing 7, the inner ring of the bearing 7 is in interference fit with the outer wall of the rotating shaft 1, and the outer ring of the bearing 7 is in transition fit with the second end cover 52. The bearing 7 can be an open deep groove ball bearing.
The outer wall laminating of pivot 1 is equipped with bearing footstock 6, bearing footstock 6 is established the lantern ring 61 and the fan-shaped piece 62 of circumference equipartition in lantern ring 61 outer fringe at the outer wall of pivot 1 including the laminating, and wherein the key-type connection between the inner wall of lantern ring 61 and the outer wall of pivot 1, the key-type connection is conventional technical means, does not describe here in detail.
The bearing top seat 6 is located between the first end cover 51 and the second end cover 52, the inner wall of the first end cover 51 and the outer wall of the rotating shaft 1 are both provided with plastic sliding bearings 53 in an interference fit mode, and the two plastic sliding bearings 53 are in clearance fit. One end of a plastic sliding bearing 53 arranged on the rotating shaft 1 is abutted against the step surface of the rotating shaft 1, and the bearing top seat 6 is positioned between the plastic sliding bearing 53 and the bearing 7. In this way, the first end cap 51 may also function as a support for the rotation shaft 1. The friction between the two plastic sliding bearings 53 on the same side is extremely small, and the normal operation of the motor is not affected, so that the arrangement has the advantage that when the bearing 7 is damaged, the two plastic sliding bearings 53 can play a role in temporary support and effective protection of the motor.
One end of the bearing top seat 6 is abutted against the step surface of the rotating shaft 1, the other end of the bearing top seat 6 is abutted against the inner ring of the bearing 7, specifically, the inner end of the lantern ring 61 is abutted against the step surface of the rotating shaft 1, and the outer end of the lantern ring 61 is abutted against the inner end surface of the inner ring of the bearing 7. The outer end of the outer race of the bearing 7 at the front end abuts the second end cap 52 via the wave spring washer 8. The outer end of the inner ring of the bearing 7 at the rear end is abutted by a snap ring 9. The wave washer 8 and the snap ring 9 are conventional means and will not be described in detail.
The second end cap 52 is provided with a second end cap ejection hole 54 horizontally opposed to the first end cap 51, i.e., a bolt is screwed into the second end cap ejection hole 54 to eject the first end cap 51.
The bearing top mount 6 is provided with a bearing top mount ejection hole 63 horizontally opposed to the first end cap 51. I.e., the bolts threaded into the bearing top mount ejection holes 63, can be ejected into the first end cap 51.
The bearing top seat ejection hole 63 is horizontally arranged on the fan-shaped sheet 62 in a penetrating mode, a convex part 64 protruding inwards is arranged on the outer edge of the fan-shaped sheet 62, and the bearing top seat ejection hole 63 is horizontally arranged on the convex part 64 in a penetrating mode. The protrusions 64 and the bearings 7 on the same side are located on two opposite sides of the segment 62, respectively, so that the protrusions 64 do not contact the bearings 7. The provision of the projection 64 increases the thickness of the bearing top seat ejection hole 63 to prevent the bolt from being screwed off and slipping.
The scallops 62 are disposed inwardly of the outer edge of the collar 61. Thus, a gap is left between the segment 62 and the bearing 7 on the same side without causing interference.
A gap is formed between the inner edge of the second end cover 52 positioned at the front end and the outer wall of the rotating shaft 1, the rotating shaft 1 rotates to drive the bearing top seat 6 at the front end to rotate, the fan-shaped pieces 62 generate air flow to blow and dissipate heat of the bearing 7 at the same side, and finally the air flows out from the gap between the inner edge of the second end cover 52 positioned at the front end and the outer wall of the rotating shaft 1.
The second end cap 52 at the rear end is provided with an air outlet hole 55, and the air outlet hole 55 communicates with the outer end of the bearing 7 on the side corresponding thereto. The rotation of the rotating shaft 1 drives the bearing top seat 6 at the rear end to rotate, the fan-shaped pieces 62 generate air flow to blow and dissipate heat of the bearing 7 at the same side, and finally the air flows out of the air outlet hole 55.
A bearing replacement method for an electric motor, comprising the steps of:
a. when the bearing 7 on one side is damaged, the bolt is screwed into the second end cover ejection hole 54 on the corresponding side so that the second end cover 52 on the corresponding side is ejected, and then the wave-shaped elastic washer 8 or the snap ring 9 on the corresponding side is removed;
b. screwing the bolt into the bearing top seat ejection hole 63 on the corresponding side so that the bearing top seat 6 on the side is ejected together with the bearing 7;
c. the bearing top seat 6 is assembled and the new bearing 7 is pressed in, then the wave-shaped elastic washer 8 or the snap ring 9 on the corresponding side is assembled, and then the second end cover 52 on the corresponding side is assembled.
In step c, a new bearing 7 on one side is pressed against the end surface on the other side of the rotating shaft 1. This operation ensures that the axial position of the rotary shaft 1 does not change.
The above embodiments are merely illustrative, and not restrictive, and various changes may be made by those skilled in the art without departing from the spirit and scope of the invention, and therefore all equivalent technical solutions are intended to fall within the scope of the invention.
Claims (6)
1. The utility model provides a motor, includes front and back interval distribution's end cover (5), wears to establish pivot (1) on two end covers (5) and casing (4) of connecting two end covers (5), the outer wall laminating of pivot (1) is equipped with rotor (2), the inner wall laminating of casing (4) is equipped with stator (3), form motor air gap, its characterized in that between the outer fringe of rotor (2) and the inner edge of stator (3): end cover (5) are including dismantling first end cover (51) and second end cover (52) of connection, first end cover (51) are located the inboard of second end cover (52), connect through bearing (7) between second end cover (52) and pivot (1), the outer wall laminating of pivot (1) is equipped with bearing footstock (6), bearing footstock (6) are located between first end cover (51) and second end cover (52), and the step face of pivot (1) is supported to the one end of bearing footstock (6), and the inner circle of bearing (7) is supported to the other end of bearing footstock (6), second end cover (52) are equipped with second end cover liftout hole (54) relative with first end cover (51) level, bearing footstock (6) are equipped with bearing footstock liftout hole (63) relative with first end cover (51) level, bearing footstock (6) are including laminating the lantern ring (61) and the equipartition of establishing at pivot (1) outer wall at the lantern ring (61) circumference equipartition The bearing top seat ejection hole (63) penetrates through the fan-shaped sheet (62) horizontally, the fan-shaped sheet (62) is arranged on the inner side of the outer edge of the lantern ring (61), a convex part (64) protruding inwards is arranged on the outer edge of the fan-shaped sheet (62), and the bearing top seat ejection hole (63) penetrates through the convex part (64) horizontally.
2. An electrical machine according to claim 1, wherein: the inner wall of the first end cover (51) and the outer wall of the rotating shaft (1) are provided with plastic sliding bearings (53) in an interference fit mode, and the two plastic sliding bearings (53) are in clearance fit.
3. An electrical machine according to claim 1, wherein: the outer end of the outer ring of the bearing (7) positioned at the front end is abutted against the second end cover (52) through a wave-shaped elastic washer (8), and the outer end of the inner ring of the bearing (7) positioned at the rear end is abutted against the inner end through a snap ring (9).
4. An electrical machine according to claim 1, wherein: a gap is formed between the inner edge of the second end cover (52) positioned at the front end and the outer wall of the rotating shaft (1), an air outlet hole (55) is formed in the second end cover (52) positioned at the rear end, and the air outlet hole (55) is communicated with the outer end of the bearing (7) on the corresponding side.
5. A bearing replacing method of a motor according to any one of claims 1 to 4, wherein: the method comprises the following steps:
a. when the bearing (7) on one side is damaged, the bolt is screwed into the second end cover ejection hole (54) on the corresponding side, so that the second end cover (52) on the side is ejected out, and then the wave-shaped elastic washer (8) or the snap ring (9) on the corresponding side is removed;
b. screwing the bolt into the bearing top seat ejection hole (63) on the corresponding side to eject the bearing top seat (6) and the bearing (7) on the side together;
c. mounting a bearing top seat (6), pressing and mounting a new bearing (7), then mounting a wave-shaped elastic washer (8) or a snap ring (9) on the corresponding side, and then mounting a second end cover (52) on the corresponding side;
the bearing top seat (6) comprises a sleeve ring (61) which is attached to the outer wall of the rotating shaft (1) and fan-shaped sheets (62) which are uniformly distributed on the outer edge of the sleeve ring (61) in the circumferential direction, a bearing top seat top hole (63) horizontally penetrates through the fan-shaped sheets (62), and the fan-shaped sheets (62) are arranged on the inner side of the outer edge of the sleeve ring (61);
the outer edge of the fan-shaped sheet (62) is provided with a convex part (64) protruding inwards, and the bearing top seat ejection hole (63) horizontally penetrates through the convex part (64).
6. The bearing replacing method of an electric motor according to claim 5, wherein: and in the step c, a new bearing (7) on one side is pressed against the end surface on the other side of the rotating shaft (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787425.4A CN110429743B (en) | 2019-08-26 | 2019-08-26 | Motor and bearing replacement method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787425.4A CN110429743B (en) | 2019-08-26 | 2019-08-26 | Motor and bearing replacement method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110429743A CN110429743A (en) | 2019-11-08 |
| CN110429743B true CN110429743B (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910787425.4A Active CN110429743B (en) | 2019-08-26 | 2019-08-26 | Motor and bearing replacement method thereof |
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| Country | Link |
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| CN (1) | CN110429743B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110812180A (en) * | 2019-12-03 | 2020-02-21 | 深圳市康瑞普斯医疗器械有限公司 | Heat dissipation type massage head |
| CN111030356A (en) * | 2019-12-26 | 2020-04-17 | 陕西宝成航空仪表有限责任公司 | Bearing support structure suitable for high acceleration overload condition |
| CN113726074B (en) * | 2020-05-26 | 2023-03-07 | 中车永济电机有限公司 | Electric motor |
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| JP2012210088A (en) * | 2011-03-30 | 2012-10-25 | Hitachi Ltd | Bearing portion structure of electric motor |
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| CN106169829A (en) * | 2016-07-27 | 2016-11-30 | 中车永济电机有限公司 | The traction electric machine of bearing can be changed online |
| CN207939315U (en) * | 2017-10-30 | 2018-10-02 | 比亚迪股份有限公司 | Motor rotor assembly for track, motor and bogie with same |
| CN109108895A (en) * | 2018-10-11 | 2019-01-01 | 株洲九方装备驱动技术有限公司 | The efficient disassembling fixture of bearing inner race |
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2019
- 2019-08-26 CN CN201910787425.4A patent/CN110429743B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201266862Y (en) * | 2008-10-17 | 2009-07-01 | 永济新时速电机电器有限责任公司 | End cap device of DC motor |
| CN201893642U (en) * | 2010-11-02 | 2011-07-06 | 常州富邦电气有限公司 | Axial limit device of motor bearing |
| JP2012210088A (en) * | 2011-03-30 | 2012-10-25 | Hitachi Ltd | Bearing portion structure of electric motor |
| JP6009830B2 (en) * | 2012-06-15 | 2016-10-19 | 株式会社東芝 | Fully closed motor |
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| CN110429743A (en) | 2019-11-08 |
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