CN113814936B - Tool for disassembling front bearing and rear bearing of desulfurization permanent magnet motor and using method thereof - Google Patents
Tool for disassembling front bearing and rear bearing of desulfurization permanent magnet motor and using method thereof Download PDFInfo
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- CN113814936B CN113814936B CN202111103137.6A CN202111103137A CN113814936B CN 113814936 B CN113814936 B CN 113814936B CN 202111103137 A CN202111103137 A CN 202111103137A CN 113814936 B CN113814936 B CN 113814936B
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 17
- 230000023556 desulfurization Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 7
- 230000008093 supporting effect Effects 0.000 claims abstract description 30
- 239000010963 304 stainless steel Substances 0.000 claims description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 210000005069 ears Anatomy 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 208000004350 Strabismus Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/06—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a tool for detaching front and rear bearings of a desulfurization permanent magnet motor, which comprises two half hoops which are butted, wherein each half hoop comprises a semi-arc section at the middle part and connecting plate sections at two ends, the connecting plate sections of the two half hoops are fixedly connected through a first bolt, a bearing is installed on a motor rotating shaft, a plurality of first support connecting blocks are fixed on the semi-arc sections, a supporting rod is fixedly connected on each first support connecting block, a second support connecting block is fixedly connected at the other end of the supporting rod, threaded holes are formed in the second support connecting blocks, and the second support connecting blocks are fixedly connected on a motor shell through second bolts. The motor shaft is embraced by two half staple bolts, then connects on motor housing through supporting connection piece one, bracing piece, supporting connection piece two, and utilizes the ann of end cover to tear screw hole open, simple efficient carries out stable fixed with motor shaft to can not lead to motor shaft skew in dismouting bearing, also avoided the rotor skew exactly, reached quick, economic change bearing's effect.
Description
Technical Field
The invention belongs to the field of permanent magnet motor mounting and dismounting tools, and particularly relates to a front and rear bearing dismounting tool of a desulfurization permanent magnet motor and a use method thereof.
Background
The permanent magnet motor is mainly characterized in that a rotor is composed of rare earth permanent magnets, no exciting current is needed for establishing an air gap magnetic field, but after a bearing of the permanent magnet motor is replaced and a bearing end cover of the motor is removed, the rotor is deviated under the action of magnetic force and cannot be installed again.
Disclosure of Invention
The invention provides a tool for detaching front and rear bearings of a desulfurization permanent magnet motor and a using method thereof, which are used for solving the technical problems that a rotor is composed of rare earth permanent magnets, an air gap field is established without exciting current, but the rotor is deflected and cannot be installed again under the action of magnetic force after a bearing of the permanent magnet motor is replaced and a bearing end cover of the motor is detached.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a bearing extracting tool around desulfurization permanent-magnet machine installs in the motor shaft of motor casing, including the half staple bolt of two butt joints, half staple bolt includes the semicircle section at middle part and the connecting plate section at both ends, and the connecting plate section of two half staple bolts passes through bolt fixed connection, and two halves staple bolts are fixed cup joints in the motor shaft, installs the bearing in the motor shaft, and two halves staple bolt is located the bearing and is close to the inboard one end of motor casing, be fixed with a plurality of supporting connection piece one on the semicircle section, fixedly connected with bracing piece on the supporting connection piece one, the one end of bracing piece is fixed on the supporting connection piece one, and the other end fixedly connected with supporting connection piece two of bracing piece, open threaded hole on the supporting connection piece two, supporting connection piece two is through bolt two fixed connection on the bolt hole of motor casing connection end cover.
Through adopting above-mentioned technical scheme, motor shaft is embraced by two half staple bolts, then connects on motor housing through supporting connection piece one, bracing piece, supporting connection piece two, and utilizes the ann of end cover to tear threaded hole open, and simple efficient carries out stable fixed with motor shaft to can not lead to motor shaft skew in dismouting bearing, also avoided the rotor skew, reached quick, economic change bearing's effect.
Preferably, the first support connecting block, the support rod and the second support connecting block are sequentially welded and connected.
Through adopting above-mentioned technical scheme, support connecting block one, bracing piece and support connecting block two are connected conveniently, convenient to use.
Preferably, the corresponding parts of the first support connecting block and the semi-arc section are respectively provided with a through hole, and the first support connecting block and the semi-arc section are fixedly connected through a third bolt.
Through adopting above-mentioned technical scheme, half staple bolt and supporting connection piece one, bracing piece and two three dismantlements of supporting connection piece are installed, convenient to use, easy operation.
Preferably, two positions are respectively connected to the supporting and connecting block on each semicircular arc section.
Through adopting above-mentioned technical scheme, four bracing pieces altogether, connection stability is higher.
Preferably, a spare connecting hole is reserved on the semicircular section.
Through adopting above-mentioned technical scheme, according to the in-service use condition, can increase the number of bracing piece, improve stability.
Preferably, the first two support connecting blocks are respectively located on the 75-degree and 105-degree angle lines of the semicircular arc section, and the spare connecting holes are arranged at two positions and respectively located on the 15-degree and 165-degree angle lines of the semicircular arc section.
By adopting the technical scheme, the position arrangement is reasonable, and the supporting effect is good.
Preferably, on the relative connecting plate section of two halves staple bolts, be provided with the locating piece on one of them connecting plate section, be provided with the constant head tank on the other connecting plate section, locating piece and constant head tank size match.
Through adopting above-mentioned technical scheme, the connection convenient and fast of two half staple bolts is aimed at.
Preferably, the first support connecting block is arranged on one side, far away from the bearing, of the half hoop.
Through adopting above-mentioned technical scheme, motor housing inner space is limited, and support connecting block one sets up and is favorable to supporting in the one side that bearing was kept away from to half staple bolt.
Preferably, the half hoop, the first support connecting block, the support rod and the second support connecting block are all of shape structures made of 304 stainless steel.
Through adopting above-mentioned technical scheme, structural strength is good.
A method for using a tool for detaching front and rear bearings of a desulfurization permanent magnet motor comprises the steps of firstly detaching an end cover on a motor shell, integrally connecting a first support connecting block, a support rod and a second support connecting block to the motor shell through a second bolt, fixing the two half hoops on a motor rotating shaft through the first bolt after the positions of the two half hoops are determined through the first support connecting block, connecting the first support connecting block and the half hoops through a third bolt support, and finally detaching a bearing through a puller to finish the bearing detaching and assembling stably for the motor rotating shaft.
The invention has the beneficial effects that: the motor shaft is embraced by two half staple bolts, then connects on motor housing through supporting connection piece one, bracing piece, supporting connection piece two, and utilizes the ann of end cover to tear screw hole open, simple efficient carries out stable fixed with motor shaft to can not lead to motor shaft skew in dismouting bearing, also avoided the rotor skew exactly, reached quick, economic change bearing's effect.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.
Drawings
FIG. 1 is a schematic structural assembly diagram of a tool for disassembling front and rear bearings of a desulfurized permanent magnet motor according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a tool for dismounting front and rear bearings of a desulfurization permanent magnet motor according to an embodiment of the invention.
Reference numerals: 1. a motor housing; 2. a motor shaft; 3. half hoop; 31. a semicircular arc section; 32. a connecting plate section; 4. A first bolt; 5. a bearing; 6. supporting a first connecting block; 7. a support bar; 8. a second supporting connecting block; 9. a second bolt; 10. and a third bolt.
Detailed Description
The technical solutions of the present invention are described in detail below by examples, and the following examples are only exemplary and can be used only for explaining and illustrating the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.
Combine fig. 1 and fig. 2, a bearing extracting tool around desulfurization permanent-magnet machine, install on motor shaft 2 in motor casing 1, half staple bolt 3 including two butt joints, half staple bolt 3 includes semicircle section 31 at middle part and connecting plate section 32 at both ends, connecting plate section 32 of two half staple bolts 3 passes through 4 fixed connection of bolt, two halves staple bolt 3 is fixed to be cup jointed on motor shaft 2, install bearing 5 on the motor shaft 2, two halves staple bolt 3 is located the one end that bearing 5 is close to motor casing 1 inboard, be fixed with a plurality of support connecting block 6 on the semicircle section 31, fixedly connected with bracing piece 7 on the support connecting block 6, the one end of bracing piece 7 is fixed on support connecting block 6, the other end fixedly connected with support connecting block two 8 of bracing piece 7, it has the screw hole to open on the support connecting block two 8, support connecting block two 8 passes through bolt two 9 fixed connection on the bolt hole of motor casing 1 connection end cover.
Motor shaft 2 is embraced by two half staple bolts 3, then connects on motor housing 1 through supporting connection piece one 6, bracing piece 7, supporting connection piece two 8, and utilizes the ann of end cover to tear open the screw hole open, simple efficient carries out stable fixing with motor shaft 2 to can not lead to 2 squints of motor shaft in dismouting bearing 5, also avoided the rotor skew, reached quick, economic change bearing 5's effect.
The first support connecting block 6, the support rod 7 and the second support connecting block 8 are sequentially welded and connected, and the first support connecting block 6, the support rod 7 and the second support connecting block 8 are convenient to connect and use.
The corresponding positions of the first support connecting block 6 and the semi-circular arc section 31 are respectively provided with a through hole, the first support connecting block 6 and the semi-circular arc section 31 are fixedly connected through three bolts 10, and the first support connecting block 6, the support rod 7 and the second support connecting block 8 are detached and installed in the semi-hoop 3, so that the use is convenient and the operation is simple.
The first support connecting block 6 on each semicircular arc section 31 is connected with two support rods 7 at four positions, and the connection stability is high.
Spare connecting holes are reserved on the semicircular arc sections 31, the number of the supporting rods 7 can be increased according to actual use conditions, and stability is improved.
Two support connecting block 6 are located 75 and 105 angle lines of semicircle section 31 respectively, and reserve connecting hole sets up two and is located 15 and 165 angle lines of semicircle section 31 respectively, and the position is arranged rationally, and the support effect is better.
On the relative connecting plate section 32 of two halves staple bolt 3, be provided with the locating piece on one connecting plate section 32, be provided with the constant head tank on the other connecting plate section 32, locating piece and constant head tank size match, the connection of two halves staple bolt 3 is convenient and fast aims at.
The use method comprises the following steps of firstly detaching an end cover on the motor shell 1, integrally connecting a first support connecting block 6, a support rod 7 and a second support connecting block 8 to the motor shell 1 through a second bolt 9, determining the positions of two half hoops 3 through the first support connecting block 6, fixing the two half hoops 3 on the motor rotating shaft 2 through a first bolt 4, connecting the first half hoops and the half hoops 3 through a third bolt 10, and finally detaching the bearing 5 through a puller to finish the stable bearing 5 detachment and installation of the motor rotating shaft 2.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be considered by those skilled in the art within the technical scope of the present invention disclosed herein should be covered within the scope of the present invention.
Claims (10)
1. The utility model provides a desulfurization permanent-magnet machine fore-and-aft bearing extracting tool, installs on motor shaft (2) in motor casing (1), its characterized in that: including half staple bolt (3) of two butt joints, half staple bolt (3) are including semicircle section (31) at middle part and connecting plate section (32) at both ends, and connecting plate section (32) of two half staple bolts (3) are through bolt (4) fixed connection, and two halves staple bolt (3) are fixed to be cup jointed on motor shaft (2), install bearing (5) on motor shaft (2), and two halves staple bolt (3) are located bearing (5) and are close to the one end of motor casing (1) inboard, be fixed with a plurality of support connecting block (6) on semicircle section (31), fixedly connected with bracing piece (7) on support connecting block (6), the one end of bracing piece (7) is fixed on support connecting block (6), and the other end fixedly connected with of bracing piece (7) supports connecting block two (8), it has the screw hole to open on support connecting block two (8), support connecting block two (8) are through bolt two (9) fixed connection on the bolt hole of motor casing (1) connection end cover.
2. The tool for dismounting front and rear bearings of a desulfurization permanent magnet motor according to claim 1, characterized in that: and the first support connecting block (6), the support rod (7) and the second support connecting block (8) are sequentially connected in a welding manner.
3. The tool for dismounting front and rear bearings of a desulfurization permanent magnet motor according to claim 2, characterized in that: the corresponding parts of the first support connecting block (6) and the semi-circular arc section (31) are respectively provided with a through hole, and the first support connecting block (6) and the semi-circular arc section (31) are fixedly connected through a third bolt (10).
4. The tool for dismounting front and rear bearings of a desulfurization permanent magnet motor according to claim 3, characterized in that: and a first support connecting block (6) on each semicircular arc section (31) is respectively connected with two positions.
5. The tool for dismounting front and rear bearings of a desulfurization permanent magnet motor according to claim 4, characterized in that: and a spare connecting hole is also reserved on the semicircular arc section (31).
6. The tool for dismounting front and rear bearings of a desulfurization permanent magnet motor according to claim 5, characterized in that: two support connecting block (6) are located 75 and 105 angle lines of semicircle arc section (31) respectively, reserve connecting hole sets up two and is located 15 and 165 angle lines of semicircle arc section (31) respectively.
7. The tool for dismounting front and rear bearings of desulfurization permanent magnet motor according to claim 6, characterized in that: and on the connecting plate sections (32) opposite to the two half anchor ears (3), one connecting plate section (32) is provided with a positioning block, the other connecting plate section (32) is provided with a positioning groove, and the positioning block is matched with the positioning groove in size.
8. The tool for dismounting front and rear bearings of a desulfurized permanent magnet motor according to claim 7, wherein: and the first support connecting block (6) is arranged on one side of the half hoop (3) far away from the bearing (5).
9. The tool for dismounting front and rear bearings of a desulfurized permanent magnet motor according to claim 8, wherein: and the half hoop (3), the first support connecting block (6), the support rod (7) and the second support connecting block (8) are of a shape structure made of 304 stainless steel.
10. The use method of the tool for dismounting the front bearing and the rear bearing of the desulfurization permanent magnet motor according to any one of claims 1 to 9, is characterized in that: the end cover on motor housing (1) is firstly disassembled, the supporting connection block I (6), the supporting rod (7), the supporting connection block II (8) is integrally connected to the motor housing (1) through the bolt II (9), after the position of the two half hoops (3) is determined through the supporting connection block I (6), the two half hoops (3) are fixed to the motor rotating shaft (2) through the bolt I (4), the bolt III (10) is used for supporting and connecting the bolt I and the half hoops (3), finally, the bearing (5) is disassembled through the puller, and the bearing (5) which is stable in the motor rotating shaft (2) is assembled and disassembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111103137.6A CN113814936B (en) | 2021-09-18 | 2021-09-18 | Tool for disassembling front bearing and rear bearing of desulfurization permanent magnet motor and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111103137.6A CN113814936B (en) | 2021-09-18 | 2021-09-18 | Tool for disassembling front bearing and rear bearing of desulfurization permanent magnet motor and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113814936A CN113814936A (en) | 2021-12-21 |
| CN113814936B true CN113814936B (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111103137.6A Active CN113814936B (en) | 2021-09-18 | 2021-09-18 | Tool for disassembling front bearing and rear bearing of desulfurization permanent magnet motor and using method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203875840U (en) * | 2014-05-21 | 2014-10-15 | 田灿 | Bearing disassembling tool |
| CN106100264A (en) * | 2016-08-22 | 2016-11-09 | 山西北方机械制造有限责任公司 | High-power permanent magnet motor presetting system bearing disassembling device in one |
| CN108199549A (en) * | 2018-02-01 | 2018-06-22 | 中车株洲电机有限公司 | Rotor vertical fixing device and the vertical fixing means of rotor |
| CN208374784U (en) * | 2018-06-25 | 2019-01-15 | 东莞市星泓金属科技有限公司 | A kind of quick clamping fixture for bearing processing |
| CN210536452U (en) * | 2019-08-27 | 2020-05-15 | 中船重工电机科技股份有限公司 | A shaft lifting mechanism for replacing a sliding bearing bush is arranged on a motor bearing seat |
| CN210550791U (en) * | 2019-06-05 | 2020-05-19 | 江苏省科华光电科技有限公司 | Street lamp mounting tool |
| CN213562279U (en) * | 2020-09-09 | 2021-06-29 | 天津纳澜汇泽科技有限公司 | Motor equipment dismounting device |
| CN213731358U (en) * | 2020-11-20 | 2021-07-20 | 新协同（宁波）油脂有限公司 | Clamp for bearing life testing machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3255160B2 (en) * | 1999-12-10 | 2002-02-12 | 松下電器産業株式会社 | Brushless motor and method of assembling the same |
-
2021
- 2021-09-18 CN CN202111103137.6A patent/CN113814936B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203875840U (en) * | 2014-05-21 | 2014-10-15 | 田灿 | Bearing disassembling tool |
| CN106100264A (en) * | 2016-08-22 | 2016-11-09 | 山西北方机械制造有限责任公司 | High-power permanent magnet motor presetting system bearing disassembling device in one |
| CN108199549A (en) * | 2018-02-01 | 2018-06-22 | 中车株洲电机有限公司 | Rotor vertical fixing device and the vertical fixing means of rotor |
| CN208374784U (en) * | 2018-06-25 | 2019-01-15 | 东莞市星泓金属科技有限公司 | A kind of quick clamping fixture for bearing processing |
| CN210550791U (en) * | 2019-06-05 | 2020-05-19 | 江苏省科华光电科技有限公司 | Street lamp mounting tool |
| CN210536452U (en) * | 2019-08-27 | 2020-05-15 | 中船重工电机科技股份有限公司 | A shaft lifting mechanism for replacing a sliding bearing bush is arranged on a motor bearing seat |
| CN213562279U (en) * | 2020-09-09 | 2021-06-29 | 天津纳澜汇泽科技有限公司 | Motor equipment dismounting device |
| CN213731358U (en) * | 2020-11-20 | 2021-07-20 | 新协同（宁波）油脂有限公司 | Clamp for bearing life testing machine |
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| Publication number | Publication date |
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| CN113814936A (en) | 2021-12-21 |
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