CN201663508U - High-speed precise electric main shaft - Google Patents
High-speed precise electric main shaft Download PDFInfo
- Publication number
- CN201663508U CN201663508U CN2010201127577U CN201020112757U CN201663508U CN 201663508 U CN201663508 U CN 201663508U CN 2010201127577 U CN2010201127577 U CN 2010201127577U CN 201020112757 U CN201020112757 U CN 201020112757U CN 201663508 U CN201663508 U CN 201663508U
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- CN
- China
- Prior art keywords
- main shaft
- bearing
- electric main
- speed
- rotating shaft
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- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a high-speed precise electric main shaft, which comprises a shell. A motor is arranged in the shell; the rotating shaft of the motor is assembled on the shell through the transmission of a front bearing and a rear bearing; a rear small cover fixed on the shell is pressed at the rear end of the rear bearing; the bearings comprise rolling element assemblies sleeving on the rotating shaft and bearing outer rings at the outer sides of the rolling element assemblies; and the rotating shaft is provided with bearing inner raceways at the positions of the bearings. In the utility model, the rotating shaft of the motor is provided with the bearing inner raceways, and thereby, bearing inner rings are not needed; the dimensions of the shaft necks of the rotating shaft, which are provided with the bearings, are increased, and the rigidity of the main shaft is increased without increasing the overall dimension of the electric main shaft. Moreover, the bearing inner rings are not needed, and thereby, the number of parts is reduced, the installation is convenient, and the assembling efficiency of the electric main shaft is improved. Simultaneously, the bearing inner rings are not arranged, and thereby, the matching change of the bearing inner rings and the bearing outer rings, which is caused by the centrifugal forces of the bearing inner rings, is avoided, the bearing slip is avoided, the vibration and the noise of the main shaft are reduced, and the work of the electric main shaft is stable.
Description
Technical field
The utility model relates to a kind of high-speed and precise electric main shaft.
Background technology
The supporting structure of rotating shaft of electricity main shaft is more, and standard rolling bearing, air-bearing and magnetic suspension bearing are arranged, and wherein roller bearing is because dismounting is simple, and it is convenient to change, and moderate cost is safeguarded easily and is widely used.But, the rolling bearing of standard is fitted with bearing inner race, this makes the installation axle journal of electric main shaft diminish, naturally reduced the rigidity of main shaft, though can make in groups by bearing and be used for improving supporting rigidity, but the thing followed is the reduction significantly of bearing limit speed, causes the high speed performance of electric main shaft bad, and this contradiction has become the main bottleneck of the electric main shaft that uses under high rotating speed working condition.In addition, the high speed and precision rolling bearing is very high to the requirement of installing, and the rotating shaft of electric main shaft is also very high to the requirement of machining accuracy and size stability, cooperates between the rotating shaft of rolling bearing and electric main shaft and will realize reasonably installation cooperation; But when electric main shaft high speed rotating,, destroy the stable working of electric main shaft, cause the electric main shaft can't operate as normal because the change that the centrifugal force of bearing inner race can cause both to cooperate equally so can cause that bearing skids, increases the vibration and the noise of main shaft.
Summary of the invention
The purpose of this utility model is to provide a kind of high-speed and precise electric main shaft, exists the outer ring to cause the installation axle journal of electric main shaft to diminish to solve in the prior art owing to bearing, the problem that the rigidity of main shaft reduces.
For achieving the above object, the utility model adopts following technical scheme: a kind of high-speed and precise electric main shaft, comprise housing, be provided with motor in this housing, the rotating shaft of described motor is rotated on the described housing of assembling by front and back bearings, the rear end of described rear bearing is pressed with the back tegillum that is fixed on the housing, and described bearing comprises the bearing outer ring in the rolling element assembly that is sleeved in the described rotating shaft and the described rolling element assembly outside, and described rotating shaft is provided with raceway in the bearing in described bearing place.
Be provided with spring attachment between described rear bearing outer ring and the described back tegillum.
Described spring attachment comprises spring base and is arranged on holddown spring in the spring base, and an end of described spring base cooperates with described bearing outer ring, and the other end cooperates with described tegillum afterwards by described spring.
Be provided with spacer ring between described spring base and the described bearing outer ring.
Be provided with lash adjusting device between described spring base and the described back tegillum.
Described lash adjusting device is the thread pitch adjusting device.
Described thread pitch adjusting device comprises a screw, and the screwed hole on this screw and the described back tegillum forms threaded engagement, and the end face of described screw cooperates with the corresponding end face of described spring base.
Described housing is provided with by enclosure interior and extends to outside steam vent.
The rotating shaft of motor of the present utility model is provided with raceway in the bearing, saved bearing inner race, has increased the size that rotating shaft is provided with the axle journal at bearing place under the condition that does not increase electric main shaft overall dimensions, has increased the rigidity of main shaft.In addition, save bearing inner race, reduced the number of part, made things convenient for installation, improved the packaging efficiency of electric main shaft.Simultaneously, the bearing enclose that does not have bearing inner race also to avoid the centrifugal force owing to bearing inner race to cause cooperates and changes, and has avoided bearing to skid, and has reduced the vibration and the noise of main shaft, the stable working of electric main shaft.
Be provided with spring attachment between rear bearing of the present utility model outer ring and the back tegillum, one end of the spring base of spring attachment cooperates with bearing outer ring, the other end cooperates with the back tegillum by spring, make that the position, interior raceway implementation space that processes in rear bearing outer ring raceway and the rotating shaft is reasonable, the influence of the span mismachining tolerance of raceway in not being subjected to; Realize reasonably work rigidity simultaneously.
Be provided with the thread pitch adjusting device between spring base of the present utility model and the back tegillum, screwed hole on the screw of thread pitch adjusting device and the back tegillum forms threaded engagement, the end face of screw cooperates with the corresponding end face of described spring base, can realize the pretension of bearing by the thread pitch adjusting device, guarantee that further the position, interior raceway implementation space that processes in rear bearing outer ring raceway and the rotating shaft is reasonable, the influence of the span mismachining tolerance of raceway in not being subjected to.
Housing of the present utility model is provided with by enclosure interior and extends to outside steam vent, and steam vent can utilize pressure reduction that the hot-air of electric main shaft inside is discharged naturally, guarantees the working temperature of electric main shaft.
Description of drawings
Fig. 1 is overall structure figure of the present utility model;
Fig. 2 is partial structurtes figure of the present utility model.
Concrete enforcement side
In Fig. 1,2, a kind of high-speed and precise electric main shaft, comprise housing 8, be provided with motor in the housing 8, the rotating shaft 7 of motor is rotated on the assembling shell by fore bearing and rear bearing, the position that front and back bearings is installed in rotating shaft 7 is provided with raceway in the bearing, and the roller of fore bearing and rear bearing is installed in the interior raceway of bearing.Be disposed with spacer ring 5 and spring base 4 in the rotating shaft 7 in the outside of the bearing outer ring 6 of rear bearing, spacer ring 5 is sleeved in the rotating shaft 7, and spring base 4 is arranged on the termination of rotating shaft 7.Be provided with spring 3 in the spring base 4, spring base 4 cooperates with the back tegillum 2 that is fixed on by screw thread on the housing by spring 3.The center of back tegillum 2 is provided with screwed hole, is installed with screw 1 in the screwed hole, and the end face of screw 1 cooperates with the corresponding end face of spring base.Housing 8 is provided with by enclosure interior and extends to outside steam vent 9.
Claims (8)
1. high-speed and precise electric main shaft, comprise housing, be provided with motor in this housing, the rotating shaft of described motor is rotated on the described housing of assembling by front and back bearings, the rear end of described rear bearing is pressed with the back tegillum that is fixed on the housing, it is characterized in that: described bearing comprises the bearing outer ring in the rolling element assembly that is sleeved in the described rotating shaft and the described rolling element assembly outside, and described rotating shaft is provided with raceway in the bearing in described bearing place.
2. high-speed and precise electric main shaft according to claim 1 is characterized in that: be provided with spring attachment between described rear bearing outer ring and the described back tegillum.
3. high-speed and precise electric main shaft according to claim 2, it is characterized in that: described spring attachment comprises spring base and is arranged on holddown spring in the spring base, one end of described spring base cooperates with described bearing outer ring, and the other end cooperates with described back tegillum by described spring.
4. high-speed and precise electric main shaft according to claim 3 is characterized in that: be provided with spacer ring between described spring base and the described bearing outer ring.
5. according to claim 2 or 3 or 4 described high-speed and precise electric main shafts, it is characterized in that: be provided with lash adjusting device between described spring base and the described back tegillum.
6. high-speed and precise electric main shaft according to claim 5 is characterized in that: described lash adjusting device is the thread pitch adjusting device.
7. high-speed and precise electric main shaft according to claim 6, it is characterized in that: described thread pitch adjusting device comprises a screw, screwed hole on this screw and the described back tegillum forms threaded engagement, and the end face of described screw cooperates with the corresponding end face of described spring base.
8. high-speed and precise electric main shaft according to claim 1 is characterized in that: described housing is provided with by enclosure interior and extends to outside steam vent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201127577U CN201663508U (en) | 2010-02-11 | 2010-02-11 | High-speed precise electric main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201127577U CN201663508U (en) | 2010-02-11 | 2010-02-11 | High-speed precise electric main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201663508U true CN201663508U (en) | 2010-12-01 |
Family
ID=43233927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201127577U Expired - Lifetime CN201663508U (en) | 2010-02-11 | 2010-02-11 | High-speed precise electric main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201663508U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108544251A (en) * | 2018-06-21 | 2018-09-18 | 南京航空航天大学 | A kind of electro spindle of numerically-controlled machine tool using integrated bearing |
| WO2020228174A1 (en) * | 2019-05-15 | 2020-11-19 | 广东威灵电机制造有限公司 | Bearing assembly, rotor assembly and fan |
| US11353035B2 (en) | 2019-05-15 | 2022-06-07 | Guangdong Welling Motor Manufacturing Co., Ltd. | Bearing assembly, rotor assembly and draught fan |
-
2010
- 2010-02-11 CN CN2010201127577U patent/CN201663508U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108544251A (en) * | 2018-06-21 | 2018-09-18 | 南京航空航天大学 | A kind of electro spindle of numerically-controlled machine tool using integrated bearing |
| WO2020228174A1 (en) * | 2019-05-15 | 2020-11-19 | 广东威灵电机制造有限公司 | Bearing assembly, rotor assembly and fan |
| US11353035B2 (en) | 2019-05-15 | 2022-06-07 | Guangdong Welling Motor Manufacturing Co., Ltd. | Bearing assembly, rotor assembly and draught fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180509 Address after: 471000 No. 1 axis research road, Jianxi science and Technology Industrial Park, Luoyang, Henan Patentee after: Luoyang Bearing Research Institute Address before: 471039 Fenghua Road, Luoyang hi tech Development Zone, Luoyang, Henan 6 Patentee before: Zhouyan Science and Technology Co., Ltd., Luoyang |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101201 |
|
| CX01 | Expiry of patent term |