CN202726075U - Gearbox spindle structure for numerical control drilling and milling machine - Google Patents
Gearbox spindle structure for numerical control drilling and milling machine Download PDFInfo
- Publication number
- CN202726075U CN202726075U CN 201220471967 CN201220471967U CN202726075U CN 202726075 U CN202726075 U CN 202726075U CN 201220471967 CN201220471967 CN 201220471967 CN 201220471967 U CN201220471967 U CN 201220471967U CN 202726075 U CN202726075 U CN 202726075U
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- China
- Prior art keywords
- bearing
- ball bearing
- cylindrical roller
- main shaft
- thrust ball
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a gearbox spindle structure for a numerical control drilling and milling machine. The gearbox spindle structure comprises a spindle, wherein the front end of the spindle is provided with a double-row cylindrical roller bearing, a first thrust ball bearing and a second thrust ball bearing; the double-row cylindrical roller bearing and the first thrust ball bearing are arranged in a bearing block; the bearing block is fixed on a box body; an inner spacer bush and an outer spacer bush are arranged between the double-row cylindrical roller bearing and the first thrust ball bearing; an adjusting pad is arranged between the double-row cylindrical roller bearing and the spindle; the second thrust ball bearing is fixed above the bearing block through a sleeve and a locking nut; an angular contact ball bearing is arranged at the rear end of the spindle; and the angular contact ball bearing is fixed on the box body. According to the gearbox spindle structure, the performance requirements of high rigidity, high precision, high-rate cutting and the like can be met, the part machining difficulty can be reduced, and the application range is wide.
Description
Technical field
The utility model relates to a kind of numerical control drilling milling machine, especially relates to a kind of numerical control drilling milling machine transmission main shaft structure.
Background technology
The numerical control drilling milling machine be a kind ofly integrate brill, mill, the process equipment of the manufacturing procedure such as boring, be to realize main shaft low-speed big drilling function, this class lathe main transformer speed system adopt 4 grades manually or automatically speed change add the version that spindle servo electric machine is realized main shaft interior stepless speed regulations at different levels.Be mainly used at a high speed aperture processing and milling, low speed is mainly used in large hole drilling.
At present, general three angular contact ball bearings that adopt of the CNC milling machine transmission main shaft of same specification support, and its basic dynamic axial load rating only is 63KN, and this main axle structure can not satisfy the performance requirements such as the high rigidity, high accuracy, high-rate cutting of above-mentioned numerical control drilling milling machine.In addition, this bearing is directly installed on the box body hole, and this box body hole end face run-out that just requires to contact with bearing requires in 0.005 μ m, and difficulty of processing is large, is difficult to guarantee the rotating accuracy of main shaft.
The utility model content
Technical problem to be solved in the utility model is, provides a kind of and can satisfy high rigidity, high accuracy, high-rate cutting performance requirement, can reduce again the numerical control drilling milling machine transmission main shaft structure of part difficulty of processing.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of numerical control drilling milling machine transmission main shaft structure, comprise main shaft, the front end of described main shaft is provided with Biserial cylindrical roller bearing, the first thrust ball bearing, the second thrust ball bearing, described Biserial cylindrical roller bearing, the first thrust ball bearing is contained in the bearing block, described bearing block is fixed on the casing, be provided with inner spacing collar and outer separator between described Biserial cylindrical roller bearing and the first thrust ball bearing, be provided with adjusting pad between described Biserial cylindrical roller bearing and the main shaft, described the second thrust ball bearing is fixed on the bearing block top by cover and locking nut; The rear end of described main shaft is provided with angular contact ball bearing, and described angular contact ball bearing is fixed on the casing.
Further, described Biserial cylindrical roller bearing is P4 level Biserial cylindrical roller bearing.
Further, described bearing block and casing interference fits also are connected by screw, and the upper surface of described bearing block does not contact with casing.
Further, described angular contact ball bearing is that contact angle is 25 ° paired angular contact ball bearing.
Compared with prior art, the utlity model has following advantage: the front support of main shaft adopts Biserial cylindrical roller bearing, the combining structure of the first thrust ball bearing and the second thrust ball bearing, Biserial cylindrical roller bearing is used for improving the main shaft radial rigidity, radial cutting force when bearing milling, axial cutting force when thrust ball bearing is used for axial location and bears boring, the rear support employing contact angle of main shaft is 25 ° paired angular contact ball bearing, this collocation form increases substantially the integral stiffness of main shaft, can satisfy the requirement of high-rate cutting, thereby the brill that satisfies lathe mills function.In addition, Biserial cylindrical roller bearing and the first thrust ball bearing are contained in the bearing block, bearing block and case supports hole interference fits, and be connected with casing by screw, this structure can reduce the casing difficulty of processing, and the bearing block machining accuracy is easy to guarantee, thereby guarantees the rotating accuracy of main shaft.
In sum, the utility model can satisfy the performance requirements such as high rigidity, high accuracy, high-rate cutting, can reduce again the part difficulty of processing, and the scope of application is wider.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
With reference to accompanying drawing, present embodiment comprises main shaft 7, the front end of described main shaft 7 is provided with Biserial cylindrical roller bearing 9, the first thrust ball bearing 10, the second thrust ball bearing 11, described Biserial cylindrical roller bearing 9, the first thrust ball bearing 10 are contained in the bearing block 4, described bearing block 4 is fixed on the casing 1, be provided with inner spacing collar 6 and outer separator 8 between described Biserial cylindrical roller bearing 9 and the first thrust ball bearing 10, be provided with adjusting pad 5 between described Biserial cylindrical roller bearing 9 and the main shaft 7, described the second thrust ball bearing 11 by overlap 3 and locking nut 2 be fixed on bearing block 4 tops; The rear end of described main shaft 7 is provided with the angular contact ball bearing (not shown), and described angular contact ball bearing is fixed on the casing.
Described Biserial cylindrical roller bearing 9 is P4 level Biserial cylindrical roller bearing.
Described bearing block 4 and casing 1 interference fits also are connected by screw, and the upper surface of described bearing block 4 does not contact with casing 1.
Described angular contact ball bearing is that contact angle is 25 ° paired angular contact ball bearing.
Described adjusting pad 5 is used for adjusting the radial clearance of Biserial cylindrical roller bearing 9.
The machining accuracy of the comparable casing 1 of the machining accuracy of described bearing block 4 is much higher, and difficulty of processing is little, can guarantee the synthesis precision of spindle assemblies.Present embodiment can satisfy the performance requirements such as high rigidity, high accuracy, high-rate cutting, can reduce the part difficulty of processing again.
Claims (4)
1. numerical control drilling milling machine transmission main shaft structure, comprise main shaft, it is characterized in that: the front end of described main shaft is provided with Biserial cylindrical roller bearing, the first thrust ball bearing, the second thrust ball bearing, described Biserial cylindrical roller bearing, the first thrust ball bearing is contained in the bearing block, described bearing block is fixed on the casing, be provided with inner spacing collar and outer separator between described Biserial cylindrical roller bearing and the first thrust ball bearing, be provided with adjusting pad between described Biserial cylindrical roller bearing and the main shaft, described the second thrust ball bearing is fixed on the bearing block top by cover and locking nut; The rear end of described main shaft is provided with angular contact ball bearing, and described angular contact ball bearing is fixed on the casing.
2. numerical control drilling milling machine transmission main shaft structure according to claim 1, it is characterized in that: described Biserial cylindrical roller bearing is P4 level Biserial cylindrical roller bearing.
3. numerical control drilling milling machine transmission main shaft structure according to claim 1 and 2, it is characterized in that: described bearing block and casing interference fits also are connected by screw, and the upper surface of described bearing block does not contact with casing.
4. numerical control drilling milling machine transmission main shaft structure according to claim 1 and 2, it is characterized in that: described angular contact ball bearing is that contact angle is 25 ° paired angular contact ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471967 CN202726075U (en) | 2012-09-17 | 2012-09-17 | Gearbox spindle structure for numerical control drilling and milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471967 CN202726075U (en) | 2012-09-17 | 2012-09-17 | Gearbox spindle structure for numerical control drilling and milling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202726075U true CN202726075U (en) | 2013-02-13 |
Family
ID=47651824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220471967 Expired - Fee Related CN202726075U (en) | 2012-09-17 | 2012-09-17 | Gearbox spindle structure for numerical control drilling and milling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202726075U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825268A (en) * | 2012-09-17 | 2012-12-19 | 长沙金岭机床有限责任公司 | Transmission main shaft structure of numerical control drilling and milling machine |
| CN107830065A (en) * | 2017-12-04 | 2018-03-23 | 洛阳理工学院 | Paired thrust ball bearing pre-tightening apparatus |
-
2012
- 2012-09-17 CN CN 201220471967 patent/CN202726075U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825268A (en) * | 2012-09-17 | 2012-12-19 | 长沙金岭机床有限责任公司 | Transmission main shaft structure of numerical control drilling and milling machine |
| CN107830065A (en) * | 2017-12-04 | 2018-03-23 | 洛阳理工学院 | Paired thrust ball bearing pre-tightening apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20130917 |