CN201711566U - Boring power head with spindle provided with one-way offset device - Google Patents
Boring power head with spindle provided with one-way offset device Download PDFInfo
- Publication number
- CN201711566U CN201711566U CN2010202569796U CN201020256979U CN201711566U CN 201711566 U CN201711566 U CN 201711566U CN 2010202569796 U CN2010202569796 U CN 2010202569796U CN 201020256979 U CN201020256979 U CN 201020256979U CN 201711566 U CN201711566 U CN 201711566U
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- CN
- China
- Prior art keywords
- main shaft
- spindle
- offset assembly
- unit head
- bearing
- 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 boring power head the spindle of which is provided with a one-way offset device. The boring power head comprises a box body, the spindle arranged in the box body by a front bearing and a rear bearing, and an inner bush and an outer bush of the spindle; and the boring power head is characterized in that a spindle one-way offset device is arranged between the outer bush and the rear bearing. By proposing the scheme, the axial expansion error of the spindle is concentrated backward to the maximum extent, and the design accuracy of the spindle is guaranteed, thus improving the axial processing precision of products.
Description
Technical field:
The utility model relates to machining equipment, is specifically related to the unit head in the machining equipment.
Background technology:
The bore hole unit head is a critical piece of finishing motion of building-block machine Tool in Cutting and feed motion, is the indispensable equipment of modern mechanical processing manufacturing industry.Along with raising day by day to the component of machine required precision, required precision to the bore hole unit head also improves thereupon, at present, the bore hole unit head is in operation process, and often skew causes the machining accuracy of processed component of machine not reach requirement to two ends because of the main shaft expanded by heating.As everyone knows, in the bore hole unit head, before the external bushing two ends peak at respectively, in the rear bearing, the outer ring, external bushing is fixed with respect to the casing of bore hole unit head, and neck bush rotates with main shaft, because the difference of casing and main shaft specific heat and volume, in the mechanical work process, the intensification amplitude of main shaft, and the intensification amplitude of neck bush contacted with it is higher than external bushing, be higher than casing, therefore, behind expanded by heating, the two ends skew forwards, backwards of the free difference of main shaft, the error deviation of forward end then are to cause the precision of above-mentioned processed parts not reach the immediate cause of requirement.
Summary of the invention:
The technical problems to be solved in the utility model provides the bore hole unit head that a kind of main shaft is provided with unidirectional offset assembly, and behind the main shaft expanded by heating, main shaft can be to the front-end offset of unit head, and the precision that processed parts can not take place does not reach the phenomenon of requirement.
The utility model is achieved through the following technical solutions:
A kind of main shaft is provided with the bore hole unit head of unidirectional offset assembly, comprises casing, is installed in main shaft in the casing by forward and backward bearing, and the inside and outside lining of main shaft, is provided with the unidirectional offset assembly of main shaft between described external bushing and the rear bearing.
The further Technological improvement plan of the utility model is:
Described unidirectional offset assembly comprises spring base, spring, and described spring base is an annular canister, and described spring is arranged in the spring base annular chamber; Between described unidirectional offset assembly and the external bushing and and rear bearing between be provided with liner.
The utility model further Technological improvement plan is:
The matching relationship of described forward and backward bearing and casing all adopts interference fits.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is unidirectional offset assembly axial section of the utility model and vertical view thereof.
The specific embodiment:
As shown in Figure 1, the utility model comprises casing 6 and is installed in main shaft 1 in the casing 6, main shaft 1 front end end and clamping cutter, the rear end is connected with lathe, also comprise the neck bush 5 and external bushing 4 that are arranged between main shaft 1 two ends and the fore bearing in casing 63, rear bearing 10 and fore bearing 3 and the rear bearing 10, also be provided with spring base device 8 between external bushing 4 and the rear bearing 10, the outer ring forward end of the dead fore bearing 3 of bearing (ball) cover 2 limits is vacillated, the outer ring of bearing 10 is not after death limit in the rear end, and fore bearing 3, rear bearing 10 all adopt interference fits with cooperating of casing 6; As shown in Figure 2, spring base device 8 comprises spring base 81, spring 82, and spring base 81 is an annular, and spring base 81 sizes and rear bearing 10 are complementary, and spring 81 is arranged in spring base 81 annular chambers.
Sketch the utility model operation principle in conjunction with Fig. 1 and Fig. 2: the utility model is in work, or during off working state, because the unidirectional offset assembly that is provided with between external bushing 4 and the rear bearing is given jacking force backward of rear bearing all the time, it is dead that fore bearing 3 is subjected to the limit of bearing (ball) cover 2 in addition, therefore, when main shaft 1 expanded by heating, (also expand) with the neck bush 5 that main shaft 1 directly contacts thereupon, main shaft 1 can only be to the relatively weaker rear end skew of active force, the maximization of axial expansion error is concentrated to the back-end, thereby guaranteed the design accuracy of main shaft 1 front end, and the dimensional accuracy of work piece.
The utility model is not limited to above-mentioned bore hole unit head; unit head (the group does not lift) is equally applicable to hole; so long as between the external bushing of main shaft and rear end bearing, be provided with unidirectional offset assembly (promptly giving the device of rear bearing thrust), all belong to protection domain of the present utility model.
Claims (4)
1. a main shaft is provided with the bore hole unit head of unidirectional offset assembly, comprise casing, be installed in main shaft in the casing by forward and backward bearing, and the inside and outside lining of main shaft, it is characterized in that: be provided with the unidirectional offset assembly of main shaft between described external bushing and the rear bearing.
2. a kind of main shaft according to claim 1 is provided with the bore hole unit head of unidirectional offset assembly, it is characterized in that: described unidirectional offset assembly comprises spring base, spring, and described spring base is an annular canister, and described spring is arranged in the spring base annular chamber.
3. a kind of main shaft according to claim 1 and 2 is provided with the bore hole unit head of unidirectional offset assembly, it is characterized in that: between described unidirectional offset assembly and the external bushing and and rear bearing between be provided with liner.
4. a kind of main shaft according to claim 1 is provided with the bore hole unit head of unidirectional offset assembly, it is characterized in that: the matching relationship of described forward and backward bearing and casing all adopts interference fits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202569796U CN201711566U (en) | 2010-07-12 | 2010-07-12 | Boring power head with spindle provided with one-way offset device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202569796U CN201711566U (en) | 2010-07-12 | 2010-07-12 | Boring power head with spindle provided with one-way offset device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201711566U true CN201711566U (en) | 2011-01-19 |
Family
ID=43457566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202569796U Expired - Fee Related CN201711566U (en) | 2010-07-12 | 2010-07-12 | Boring power head with spindle provided with one-way offset device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201711566U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962582A (en) * | 2013-01-30 | 2014-08-06 | 张兆富 | Multifunctional machine tool power head |
-
2010
- 2010-07-12 CN CN2010202569796U patent/CN201711566U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962582A (en) * | 2013-01-30 | 2014-08-06 | 张兆富 | Multifunctional machine tool power head |
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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: 20110119 Termination date: 20120712 |