CN108258834A - The connection structure of rotor and bearing - Google Patents
The connection structure of rotor and bearing Download PDFInfo
- Publication number
- CN108258834A CN108258834A CN201611237021.0A CN201611237021A CN108258834A CN 108258834 A CN108258834 A CN 108258834A CN 201611237021 A CN201611237021 A CN 201611237021A CN 108258834 A CN108258834 A CN 108258834A
- Authority
- CN
- China
- Prior art keywords
- bearing
- cup type
- hollow cup
- shaft
- outer ring
- 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
Links
Classifications
-
- 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
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields 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
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Abstract
The invention discloses the connection structures of a kind of rotor and bearing, the machine shaft of this structure is the hollow cup type shaft of open rearward end, rotor core is set on hollow cup type shaft outer ring, fore bearing inner ring is set on hollow cup type shaft front end outer ring, front axle bearing outer-ring is set in the bearing hole of drive end bearing bracket, rear end cap medial surface is equipped with cantilevered axle, and the inner ring of rear bearing is set on the cantilevered axle of rear end cap medial surface, and the outer ring of rear bearing is set on hollow cup type shaft rear end inner ring.This structure changes shaft and the connection mode of bearing, overcome traditional bearing outer ring fix, inner ring rotation mode the defects of, increase the cooperation diameter of shaft and iron core, reduce motor weight, it is cost-effective, improve the power density of motor.
Description
Technical field
The present invention relates to the connection structures of a kind of rotor and bearing.
Background technology
Usual rotor includes shaft and iron core, as shown in Figure 1, iron core 2 is set on 1 outer ring of shaft, rotor iron by key 3
Core 2 generates turning moment with stator core by magnetic field induction shaft 1, and the rotation of shaft 1 is generally by set on shaft 1
Front and rear two bearings 4,5 support, at present bearing 4,5 before and after shaft 1 all fixed using bearing outer ring, the cloth of inner ring rotation
Put mode；The arrangement causes shaft 1 and the cooperation diameter of iron core 2 smaller, and for the effective straight of 2 magnetic field of rotor core
Diameter region is concentrated mainly on 2 outer ring of iron core so that 2 center of rotor core it is useless diameter region 21 it is larger, cause material
Waste increases motor weight, reduces the power density of motor.
Invention content
The technical problems to be solved by the invention are to provide the connection structure of a kind of rotor and bearing, this structure changes
The connection mode of shaft and bearing, overcome traditional bearing outer ring fix, inner ring rotation mode the defects of, increase shaft and iron
The cooperation diameter of core reduces motor weight, cost-effective, improves the power density of motor.
In order to solve the above technical problems, the connection structure of rotor of the present invention and bearing includes machine shaft, rotor iron
Core, fore bearing, rear bearing, drive end bearing bracket and rear end cap, hollow cup type shaft of the machine shaft for open rearward end, the rotor
Iron core is set on the hollow cup type shaft outer ring, and the fore bearing inner ring is set on the hollow cup type shaft front end outer ring, described
Front axle bearing outer-ring be set on the drive end bearing bracket bearing hole in, the rear end cap medial surface be equipped with cantilevered axle, it is described after bearing it is interior
For circle set on the cantilevered axle of the rear end cap medial surface, the outer ring of the rear bearing is set on the hollow cup type shaft rear end inner ring.
Further, this structure further includes bearing holder (housing, cover), and the bearing holder (housing, cover) is set on the outer ring of the rear bearing and hollow cup type turn
Between shaft rear end inner ring, and the bearing holder (housing, cover) and hollow cup type shaft rear end inner ring interference fit and the rear bearing outer ring
Transition coordinates.
Further, the rotor core is interference fitted with hollow cup type shaft outer ring.
Further, the cantilevered axle clearance fit of the inner ring and rear end cap medial surface of the rear bearing.
Further, the fore bearing inner ring coordinates with hollow cup type shaft front end outer ring transition, the front axle bearing outer-ring with
The bearing hole clearance fit of drive end bearing bracket.
Since the connection structure of rotor of the present invention and bearing employs above-mentioned technical proposal, i.e. the machine shaft of this structure is
The hollow cup type shaft of open rearward end, rotor core are set on hollow cup type shaft outer ring, and fore bearing inner ring is set on hollow cup type turn
Axis front end outer ring, front axle bearing outer-ring are set in the bearing hole of drive end bearing bracket, and rear end cap medial surface is equipped with cantilevered axle, the inner ring of rear bearing
Set on the cantilevered axle of rear end cap medial surface, the outer ring of rear bearing is set on hollow cup type shaft rear end inner ring.This structure, which changes, to be turned
The connection mode of axis and bearing, overcome traditional bearing outer ring fix, inner ring rotation mode the defects of, increase shaft and iron core
Coordinate diameter, reduce motor weight, it is cost-effective, improve the power density of motor.
Description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is conventional motors shaft and bearing connection diagram；
Fig. 2 is the attachment structure schematic diagram of rotor of the present invention and bearing.
Specific embodiment
Embodiment is as shown in Fig. 2, the connection structure of rotor of the present invention and bearing includes machine shaft 1, rotor core
2nd, fore bearing 4, rear bearing 5, drive end bearing bracket 6 and rear end cap 7, the machine shaft 1 is the hollow cup type shaft of open rearward end, described
Rotor core 2 is set on the hollow cup type shaft outer ring, and 4 inner ring of fore bearing is set on outside the hollow cup type shaft front end
Circle, 4 outer ring of fore bearing are set in the bearing hole of the drive end bearing bracket 6, and 7 medial surface of rear end cap is equipped with cantilevered axle 71, institute
The inner ring for stating rear bearing 5 is set on the cantilevered axle 71 of 7 medial surface of rear end cap, and the outer ring of the rear bearing 5 is set on described hollow
Cup type shaft rear end inner ring.
Preferably, this structure further includes bearing holder (housing, cover) 8, the bearing holder (housing, cover) 8 be set on it is described after bearing 5 outer ring with it is hollow cup type
Between the inner ring of shaft rear end, and the bearing holder (housing, cover) 8 and hollow cup type shaft rear end inner ring interference fit and the rear bearing 5
Outer ring transition cooperation.According to the magnitude relationship of rear bearing outside diameter and hollow cup type shaft rear end inner ring diameter, bearing holder (housing, cover) can be increased
Reach the support function of the empty cup type shaft of rear bearing outer ring centering, if matching between the two, bearing holder (housing, cover) can not be used.
Preferably, the rotor core 2 is interference fitted with hollow cup type shaft outer ring.
Preferably, 71 clearance fit of cantilevered axle of the inner ring and 7 medial surface of rear end cap of the rear bearing 5.
Preferably, 4 inner ring of fore bearing coordinates with the transition of hollow cup type shaft front end outer ring, 4 outer ring of fore bearing
With the bearing hole clearance fit of drive end bearing bracket 6.
The drive end bearing bracket 6 and rear end cap 7 of this structure, closing, are formed a complete motor and turned by screw and electric machine casing 9
Sub- support construction, and the shaft 1 of rotor uses hollow cup type shaft, i.e. shaft leading portion is solid, similar cup foot, and is being turned
Sub- 2 position of iron core simultaneously extends to end as hollow and distal opening, so that the position similar with traditional mounting means of fore bearing 4
In the front end of shaft 1, then then fix, outer ring rotates by inner ring for bearing 5.
This structure rotates support motor by the way that traditional solid shaft is changed into hollow cup type shaft, using rear bearing outer ring
Shaft rotates, and can increase the cooperation diameter of machine shaft and rotor core,The maximum that rotor core endoporus is done, in this way can be with
Mitigate the total quality of the components such as machine shaft and rotor core, reduce cost, improve power of motor density；By increasing motor
The cooperation diameter of shaft and rotor core, in the case where needing to export same torque, interference connection can reduce most when being driven
Slight interference amount promotes efficiency of assembling and reliability；On the other hand hollow cup type shaft can reserve enough skies in motor center
Between, it is hanged available for cable penetration, the installation multiple uses such as various kinds of sensors or heat dissipation, and with the rear end cap of rear bearing inner race cooperation
Arm axle is stationary parts, and the utilization for machine shaft hollow part is provided convenience.
Claims (5)
1. a kind of connection structure of rotor and bearing, including machine shaft, rotor core, fore bearing, rear bearing, drive end bearing bracket
And rear end cap, it is characterised in that：The machine shaft is the hollow cup type shaft of open rearward end, and the rotor core is set on described
Hollow cup type shaft outer ring, the fore bearing inner ring are set on the hollow cup type shaft front end outer ring, and the front axle bearing outer-ring is set
In in the bearing hole of the drive end bearing bracket, the rear end cap medial surface is equipped with cantilevered axle, it is described after bearing inner ring be set on it is described after
The cantilevered axle of rubbing surface of end cover, the outer ring of the rear bearing are set on the hollow cup type shaft rear end inner ring.
2. the connection structure of rotor according to claim 1 and bearing, it is characterised in that：This structure further includes bearing
Set, the bearing holder (housing, cover) be set on it is described after bearing outer ring and hollow cup type shaft rear end inner ring between, and the bearing holder (housing, cover) with
Hollow cup type shaft rear end inner ring interference fit coordinates with the rear bearing outer ring transition.
3. the connection structure of rotor according to claim 1 or 2 and bearing, it is characterised in that：The rotor core
It is interference fitted with hollow cup type shaft outer ring.
4. the connection structure of rotor according to claim 3 and bearing, it is characterised in that：The inner ring of bearing after described
With the cantilevered axle clearance fit of rear end cap medial surface.
5. the connection structure of rotor according to claim 4 and bearing, it is characterised in that：The fore bearing inner ring with
The bearing hole clearance fit of the transition cooperation of hollow cup type shaft front end outer ring, the front axle bearing outer-ring and drive end bearing bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237021.0A CN108258834A (en) | 2016-12-28 | 2016-12-28 | The connection structure of rotor and bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237021.0A CN108258834A (en) | 2016-12-28 | 2016-12-28 | The connection structure of rotor and bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108258834A true CN108258834A (en) | 2018-07-06 |
Family
ID=62719645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611237021.0A Pending CN108258834A (en) | 2016-12-28 | 2016-12-28 | The connection structure of rotor and bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108258834A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3868004A4 (en) * | 2018-10-16 | 2022-08-03 | Tamas Co., Ltd. | Hollow shaft motor |
| DE102022118352A1 (en) | 2022-07-22 | 2024-01-25 | Thyssenkrupp Steel Europe Ag | Weight and load-optimized hollow rotor shaft and method for its production |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051124A (en) * | 2012-12-27 | 2013-04-17 | 上海伊节动力科技有限公司 | Stator-free dual-electric brush dual-rotor outer circle permanent magnet synchronous motor |
| JP2015104214A (en) * | 2013-11-25 | 2015-06-04 | 株式会社安川電機 | Rotary electric machine |
| CN106160380A (en) * | 2016-07-12 | 2016-11-23 | 沈阳工业大学 | Floating bearing supports the dual stator wind power machine of center roller |
-
2016
- 2016-12-28 CN CN201611237021.0A patent/CN108258834A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051124A (en) * | 2012-12-27 | 2013-04-17 | 上海伊节动力科技有限公司 | Stator-free dual-electric brush dual-rotor outer circle permanent magnet synchronous motor |
| JP2015104214A (en) * | 2013-11-25 | 2015-06-04 | 株式会社安川電機 | Rotary electric machine |
| CN106160380A (en) * | 2016-07-12 | 2016-11-23 | 沈阳工业大学 | Floating bearing supports the dual stator wind power machine of center roller |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3868004A4 (en) * | 2018-10-16 | 2022-08-03 | Tamas Co., Ltd. | Hollow shaft motor |
| DE102022118352A1 (en) | 2022-07-22 | 2024-01-25 | Thyssenkrupp Steel Europe Ag | Weight and load-optimized hollow rotor shaft and method for its production |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180706 |