CN101577459A - Electromotor - Google Patents
Electromotor Download PDFInfo
- Publication number
- CN101577459A CN101577459A CNA2009101388422A CN200910138842A CN101577459A CN 101577459 A CN101577459 A CN 101577459A CN A2009101388422 A CNA2009101388422 A CN A2009101388422A CN 200910138842 A CN200910138842 A CN 200910138842A CN 101577459 A CN101577459 A CN 101577459A
- Authority
- CN
- China
- Prior art keywords
- outer ring
- bearing
- stopper
- board
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
- F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Abstract
The invention relates to an electromotor, comprising: a pre-pressing spring which pre-presses a rolling bearing supporting a rotor shaft. The pre-pressing spring contacts respectively with an outer ring and a support plate on both sides. The support plate contacts with a baffle in the support hole of a shell of the electromotor on opposite side of the pre-pressing spring. When the outer ring of the rolling bearing rotates in the support hole, the support plate rotates relatively between the pre-pressing spring and the baffle. The baffle only wears in part contacting with the support plate. The pre-pressing spring applies stable pre-pressure to the rolling bearing supporting the rotor shaft when the spring is not affected by wearability of the baffle and eliminates gap between the inner, outer rings of the rolling bearing and the rotary body. The electromotor of the invention can rotate at high speed without generating vibration of rotor.
Description
Technical field
The present invention relates to a kind of motor that comes the armature spindle of support rotor by rolling bearing.
Background technology
Motor comprises stator and rotor.Stator is fixed on the inner peripheral surface of columnar motor field frame.Rotor has armature spindle and rotor core.Armature spindle can rotate the central part that is supported on the motor field frame that stator is fixing freely by pair of bearings.Rotor core is aimed at the inner side of stator and is installed on the armature spindle.By giving stator with current flowing, rotor is the center rotation with the armature spindle.
The bearing of the both sides of armature spindle by being disposed at rotor core supports.Bearing is the rolling bearing that usually disposes a plurality of rotors between outer ring and inner ring.Carry out displacement in the scope by the gap of armature spindle between inner ring and outer ring and rotor of roller bearings, thereby have vibrative problem.
Japan's publication utility model communique is put down into the bearing arrangement of being put down in writing for 1 year No. 131254 in the past and is applied precompressed by the rolling bearing to supporting revolving shaft and prevent vibration.Bearing arrangement comprises the baffle plate of the end of the supported hole (dead eye) that is installed on rolling bearing.Baffle plate is relative with the outer ring of rolling bearing.Between baffle plate and outer ring, dispose the pre-compressed spring and the bearing casting die of waveform.Pre-compressed spring applies precompressed (spring force) by the bearing casting die to the outer ring of rolling bearing.The outer ring is subjected to precompressed and moves axially, and eliminates the gap between outer ring and inner ring and the rotor (ball).Thereby rotating shaft can be rotated under the state that can not vibrate.
The internal temperature of the motor field frame of motor rises because of the motor high-speed driving.Motor field frame is because of internal temperature rising thermal expansion.The rolling bearing of support rotor axle is embedded in the supported hole that is located at motor field frame.The diameter of supported hole becomes big because of the thermal expansion of motor field frame.The outer ring of rolling bearing is becoming the big inner rotation of supported hole sometimes.
In bearing arrangement in the past, when the rotation of the outer ring of bearing,, therefore there is the contact portion wear problems of baffle plate and pre-compressed spring because pre-compressed spring rotates relatively with respect to baffle plate.When motor that bearing arrangement that will be in the past is applied to rise because of the high-speed driving temperature, be difficult to stably apply precompressed to the rolling bearing of support rotor axle.
Summary of the invention
The outer ring that the object of the present invention is to provide a kind of rolling bearing at the support rotor axle can stably apply the motor of precompressed to this rolling bearing under the state of the inside of supported hole rotation.
The motor of technical scheme 1, rotate the armature spindle of support rotor freely by bearing at the central part of the motor field frame that stator is fixing, described bearing is the rolling bearing that disposes a plurality of rotors between inner ring and outer ring, described inner ring is embedded on the described armature spindle, described outer ring is embedded in the supported hole that is located at described motor field frame, described motor field frame has stopper, this stopper is inwardly outstanding at the whole inner peripheral surface of described supported hole, and it is relative with the outer ring of described bearing, dispose board and pre-compressed spring between the outer ring of this stopper and described bearing, described board is the parts of the ring-type that contacts with described stopper, described pre-compressed spring contacts with described outer ring with described board, and applies the precompressed of leaving described board and stopper direction to described outer ring.
Pre-compressed spring is distinguished the outer ring and the board of contact bearing in its both sides, and applies the precompressed of leaving the stopper direction of being located at motor field frame to the outer ring of bearing.Pre-compressed spring contacts with stopper by board.When the outer ring of bearing rotated in the inside of supported hole, pre-compressed spring rotated relatively with respect to board.Board carries out relative the rotation with respect to pre-compressed spring with stopper.The stopper of being located at motor is is only worn and torn in the part that is contacting with board.Pre-compressed spring can stably apply precompressed to the bearing of support rotor axle under the state of the influence of the wearing and tearing that are not subjected to stopper.
In the motor of technical scheme 2, described motor field frame is an aluminium alloy system.
Motor field frame is the aluminium alloy system with advantages of good abrasion.The stopper of being located at motor field frame is worn and torn hardly in the part that contacts with board.
In the motor of technical scheme 3, scribble lubricating grease on the two sides of the described board that contacts respectively with the outer ring of described stopper and described bearing.Board contacts by the lubricating grease on the two sides that is applied to board with the outer ring of stopper and bearing.When the outer ring of bearing rotated in the inside of supported hole, lubricating grease made the contact site of the outer ring of board and stopper and bearing lubricate in the both sides of board.Board rotates reposefully relatively with respect to the stopper of being located at motor field frame.Stopper is worn and torn hardly in the part that contacts with board.
Description of drawings
Fig. 1 is the cutaway view of motor of the present invention.
Fig. 2 is the support portion summary enlarged drawing on every side of armature spindle.
Embodiment
The present invention is described in detail below with reference to the accompanying drawing of representing better embodiment.
As shown in Figure 1, motor 1 of the present invention comprises rotor 3 and stator 4.Stator 4 was fixed on the interior week of columnar motor field frame 5.Motor field frame 5 is aluminium alloy systems.Stator 4 has stator core 12, stator winding 13 and winding and keeps body 10,11.Stator core 12 is embedded in week in the motor field frame 5 and fixes, and is cylinder.Stator core 21 a plurality of parts of side face within it has outstanding to the inside magnetic pole formation portion.Winding keeps body 10,11 with the form configuration in its axial two ends clamping stator core 12.Winding keeps body the 10, the 11st, has the synthetic resin system of insulating properties, is cylindrical shell. Winding maintenance body 10,11 has the corresponding volume extension portion of a plurality of magnetic pole formation portion with stator core 12 respectively.Stator winding 13 keeps the volume extension portion of body 10,11 folding and be wound in a plurality of magnetic pole formation of each of stator core 12 portion at winding.
Rotor 3 has armature spindle 2 and rotor core 7.As shown in Figure 1, two bearings 30,30 of the both sides that armature spindle 2 can be by being disposed at rotor core 7 rotate on the center that is supported on motor field frame 5 freely.Rotor core 7 is aimed at the position of stator 4 and is fixed by its central portion being embedded in armature spindle 2.Rotor core 7 has magnet insertion holes 8 and insert good permanent magnet 9 in this magnet insertion holes 8 in circumferential a plurality of parts.
Stator 4 is by producing rotating magnetic field to stator winding 13 circulation alternating currents.Rotor 3 with permanent magnet 9 is rotated in the inside of the rotating magnetic field of stator 4 generations.Armature spindle 2 has near the fan 6 that is fixed in the rotor core 7.Fan 6 rotates by the rotation of armature spindle 2, and produces the cooling air of cooled rotor 3 and stator 4.
As shown in Figure 2, the bearing the 30, the 30th of support rotor axle 2 disposes the rolling bearing of a plurality of balls (being equivalent to rolling element) 33 between inner ring 31 and outer ring 32.A plurality of ball 33 usefulness retainers 34 keep circumferential interval and dispose.
As depicted in figs. 1 and 2, motor field frame 5 has support tube 22,22 at the central part of the end wall of its both sides.Support tube 22,22 has the supported hole 21,21 that can be used for inserting logical armature spindle 2.The outer ring 32 of bearing 30 is embedded in the supported hole 21 that is located at support tube 22.The inner ring 31 of bearing 30 is embedded on the armature spindle 2.Support tube 22 has stopper 23 in the end in the outside of motor field frame 5.Stopper 23 is relative with the outer ring 32 of the bearing 30 that is embedded in supported hole 21 with inwardly outstanding form setting week in supported hole 21 whole for stopper 23.
Relative on 32 devices spaced apart ground, the outer ring of the bearing 30 of the right side of Fig. 1 support rotor axle 2 with the stopper 23 of being located at support tube 22.As depicted in figs. 1 and 2, between the stopper 23 of the outer ring 32 of bearing 30 and support tube 22, dispose pre-compressed spring 35 and board 36.Board 36 is plates of the ring-type that contacts of the inner face (face relative with the outer ring 32 of bearing 30) of the stopper 23 of and support tube 22 whole with it.Pre-compressed spring 35 is the flat springs that are configured as the waveform of ring-type.Pre-compressed spring 35 is at the outer ring 32 and the board 36 of its contact both sides bearing 30.Pre-compressed spring 35 produces spring force by strain between the outer ring 32 of bearing 30 and board 36.
The spring force of pre-compressed spring 35 to the outer ring 32 of bearing 30 to leaving stopper 23 and board 36 directions push.The outer ring 32 of the bearing 30 on 35 pairs of right sides of pre-compressed spring applies the precompressed to the inboard of motor field frame 5.Relative displacement is carried out with respect to inner ring 31 in outer ring 32, eliminates the gap between outer ring 32 and inner ring 31 and the ball 33.
Scribble lubricating grease on the two sides of board 36.Board 36 contacts with the stopper 23 of pre-compressed spring 35 and support tube 22 by the lubricating grease on its two sides.Lubricating grease can slide board 36 with respect to pre-compressed spring 35 and stopper 23.
In the bearing 30 of the left side of Fig. 1 support rotor axle 2, the outer ring 32 of this bearing 30 directly contacts with the stopper 23 of support tube 22.Inner ring 31 and armature spindle 2 inner ring 31 that be delivered to the bearing 30 in left side of the spring force that the outer ring 32 of pre-compressed spring 35 bearing 30 to the right applies by described bearing 30.The inner ring 31 of the bearing 30 in 35 pairs of left sides of pre-compressed spring applies the precompressed to the outside of motor field frame 5.Inner ring 31 carries out relative displacement with respect to outer ring 32, eliminates the gap between inner ring 31 and outer ring 32 and the ball 33.
The motor 1 of present embodiment has pre-compressed spring 35, and this pre-compressed spring 35 applies precompressed to the bearing 30 of support rotor axle 2.Pre-compressed spring 35 is eliminated the gap between outer ring 32 and inner ring 31 and the ball 33 by the outer ring 32 of axial push bearing 30.Because of having eliminated the gap of bearing 30, the rotor 3 with armature spindle 2 can carry out high speed rotating under non-vibrating state.
One side of pre-compressed spring 35 contacts with the outer ring 32 of bearing 30.One side contacts of the opposite side of pre-compressed spring 35 and board 36.The opposite side of board 36 contacts with stopper 23.Stopper 23 is parts of the ring-type that is provided with inwardly outstanding form on the interior week of the supported hole 21 that is used for chimeric bearing 30.Pre-compressed spring 35 does not directly contact with stopper 23, but contacts with stopper 23 by board 36.
The internal temperature of motor 1 rises by the high speed rotating of rotor 3.Motor field frame 5 rises by internal temperature and comes thermal expansion.The outer ring 32 of bearing 30 becomes the inside rotation of big supported hole 21 sometimes in the thermal expansion because of motor field frame 5.
When the outer ring 32 of bearing 30 rotated in the inside of supported hole 21, pre-compressed spring 35 rotated between outer ring 32 and board 36 relatively.The stopper 23 of being located at motor field frame 5 does not directly contact with pre-compressed spring 35.Even outer ring 32 is in the rotation of the inside of supported hole 21, stopper 23 is is also only worn and torn in the part that is contacting with board 36.Therefore, pre-compressed spring 35 can stably apply precompressed to bearing 30.
In the motor 1 of present embodiment, can solve problem with the simple structure of configuration board 36 between pre-compressed spring 35 and stopper 23.
The lubricating grease that is applied on the two sides of board 36 makes between board 36 and pre-compressed spring 35 and the stopper 23 lubricated.Board 36 carries out relative the rotation with respect to pre-compressed spring 35 reposefully with stopper 23.Stopper 23 is worn and torn hardly in the part that contacts with board 36.
The following describes the alter mode of the execution mode of top explanation having been carried out partial alteration.
1) in execution mode, the bearing 30 of support rotor axle 2 is that the rotor of configuration between inner ring 31 and outer ring 32 is the ball bearing of ball 33.In alter mode, the rotor that the bearing 30 of support rotor axle 2 also disposes between inner ring 31 and outer ring 32 is the roller bearing of cylindrical shape or conical roller.
2) pre-compressed spring 35 of execution mode is the flat spring that is configured as the waveform of ring-type.In alter mode, pre-compressed spring 35 also can be the flat spring of the ring-type that disposes obliquely between outer ring 32 and board 36.In other alter mode, pre-compressed spring 35 also can be a plurality of helical spring of alignment arrangements between outer ring 32 and board 36.
3) bearing 30 that is configured to the right of the pre-compressed spring 35 of execution mode applies spring force.In alter mode, the bearing 30 that pre-compressed spring 35 also can be configured to the left applies spring force.In other alter mode, pre-compressed spring 35 can be configured to also to the left and right that the bearing 30,30 of both sides applies spring force.
4) can on the two sides of board 36, not be coated with lubricating grease yet.
Whole of the face of one side of board 36 contacts with stopper 23.Friction impedance between board 36 and the stopper 23 is greater than the friction impedance between pre-compressed spring 35 and the board 36.Therefore, even the outer ring 32 of pre-compressed spring 35 and bearing 30 rotates together, board 36 can not rotate yet, thereby stopper 23 is not is not worn and torn.
As can be known, motor of the present invention comprises board from described detailed explanation, and this board is disposed between pre-compressed spring and the stopper, and described pre-compressed spring applies precompressed to the rolling bearing of support rotor axle, and described stopper is located at the supported hole of motor field frame.Stopper does not directly contact with pre-compressed spring, but contacts with pre-compressed spring by board.When the outer ring of rolling bearing rotates in the inside of supported hole, the part wearing and tearing that stopper is only contacting with board.Pre-compressed spring can be under the state of the influence of the wearing and tearing that are not subjected to stopper, stably applies precompressed to the rolling bearing of support rotor axle.
Claims (3)
1. motor, this motor rotates the armature spindle of support rotor freely by bearing at the central part of the motor field frame that stator is fixing, it is characterized in that:
Described bearing is the rolling bearing that disposes a plurality of rotors between inner ring and outer ring, and described inner ring is embedded on the described armature spindle, and described outer ring is embedded in the supported hole that is located at described motor field frame,
Described motor field frame has stopper, and this stopper is inwardly outstanding at the whole inner peripheral surface of described supported hole, and relative with the outer ring of described bearing,
Dispose board and pre-compressed spring between the outer ring of this stopper and described bearing, described board is the parts of the ring-type that contacts with described stopper, described pre-compressed spring contacts with described outer ring with described board, and applies the precompressed of leaving described board and stopper direction to described outer ring.
2. motor as claimed in claim 1 is characterized in that: described motor field frame is an aluminium alloy system.
3. motor as claimed in claim 1 or 2 is characterized in that: scribble lubricating grease on the two sides of the described board that contacts respectively with the outer ring of described stopper and described bearing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008121044A JP2009273222A (en) | 2008-05-07 | 2008-05-07 | Electric motor |
| JP2008121044 | 2008-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101577459A true CN101577459A (en) | 2009-11-11 |
Family
ID=41272286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101388422A Pending CN101577459A (en) | 2008-05-07 | 2009-04-30 | Electromotor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2009273222A (en) |
| CN (1) | CN101577459A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545973A (en) * | 2012-07-09 | 2014-01-29 | 日立汽车系统株式会社 | Rotating electrical machine |
| CN109301955A (en) * | 2017-07-24 | 2019-02-01 | 发那科株式会社 | Motor and lathe |
| CN112780686A (en) * | 2021-01-22 | 2021-05-11 | 苏州汇川技术有限公司 | Bearing cooling structure and driving motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01131254U (en) * | 1988-03-03 | 1989-09-06 | ||
| JPH06133488A (en) * | 1992-10-13 | 1994-05-13 | Mitsubishi Electric Corp | Bearing device of rotating machine |
| JP2003194052A (en) * | 2001-12-27 | 2003-07-09 | Nsk Ltd | Bearing structure for flywheel |
| JP4821303B2 (en) * | 2005-12-15 | 2011-11-24 | 日本精工株式会社 | Brushless motor and electric power steering apparatus using the same |
-
2008
- 2008-05-07 JP JP2008121044A patent/JP2009273222A/en active Pending
-
2009
- 2009-04-30 CN CNA2009101388422A patent/CN101577459A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545973A (en) * | 2012-07-09 | 2014-01-29 | 日立汽车系统株式会社 | Rotating electrical machine |
| CN103545973B (en) * | 2012-07-09 | 2015-11-18 | 日立汽车系统株式会社 | Electric rotating machine |
| CN109301955A (en) * | 2017-07-24 | 2019-02-01 | 发那科株式会社 | Motor and lathe |
| US10814446B2 (en) | 2017-07-24 | 2020-10-27 | Fanuc Corporation | Motor with shaft movable in limited manner, and machine tool |
| CN109301955B (en) * | 2017-07-24 | 2021-06-25 | 发那科株式会社 | Motor and machine tool |
| CN112780686A (en) * | 2021-01-22 | 2021-05-11 | 苏州汇川技术有限公司 | Bearing cooling structure and driving motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009273222A (en) | 2009-11-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20091111 |