CN202367214U - Pivoting support structure of high-speed and high-rigidity main shaft system - Google Patents
Pivoting support structure of high-speed and high-rigidity main shaft system Download PDFInfo
- Publication number
- CN202367214U CN202367214U CN 201120562788 CN201120562788U CN202367214U CN 202367214 U CN202367214 U CN 202367214U CN 201120562788 CN201120562788 CN 201120562788 CN 201120562788 U CN201120562788 U CN 201120562788U CN 202367214 U CN202367214 U CN 202367214U
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- main shaft
- hydrostatic bearing
- support structure
- pivoting support
- hydrostatic
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Abstract
The utility model discloses a pivoting support structure of a high-speed and high-rigidity main shaft system, which comprises a knife rest shell and a main shaft. A hydrostatic bearing sleeve is sheathed outside the front section of the main shaft; a hydrostatic oil chamber is arranged between the hydrostatic bearing sleeve and the main shaft; the hydrostatic bearing sleeve is provided with an oil inlet passage and an oil return passage which are communicated with the hydrostatic oil chamber; the middle part of the main shaft is provided with a shaft shoulder; a first thrust bearing is arranged between the shaft shoulder and the hydrostatic bearing sleeve; and a second thrust bearing is arranged between the shaft shoulder and the knife rest shell. According to the pivoting support structure of the high-speed and high-rigidity main shaft system, high-pressure circulating oil is injected into the hydrostatic oil chamber, and thus, no gaps exist between a high-pressure oil film and the main shaft; the high-pressure oil film is high in capacity of bearing the radial thrust of the main shaft, and the high rigidity and the high pivoting precision of the main shaft can be ensured. Moreover, the frictional resistance between the main shaft and the high-pressure oil film is low, and the main shaft and the hydrostatic bearing sleeve can be cooled by the circularly flowing pressure oil, and thereby, the influences of the emitted heat of the main shaft on the pivoting precision and the rigidity can eliminated, and the high-rotate speed requirement of the main shaft is met.
Description
Technical field
The utility model relates to a kind of gear-hobbing machine, the high rigidity axis system of particularly a kind of high speed pivoting support structure.
Background technology
Traditional main shaft gyration supporting structure of existing gear-hobbing machine has two kinds of forms: 1, main shaft supports through sliding bearing, and 2, main shaft supports through rolling bearing structure; The requirement of the high rotating speed of main shaft, high accuracy, high rigidity when yet existing these two kinds of main shaft supporting structures all can't satisfy modern advanced gear-hobbing machine work.Like main shaft support is sliding bearing; For guaranteeing precision, need the fit clearance of bearing less, but being prone to heating when main shaft runs up, the little sliding bearing of fit clearance expands; Thereby cause the vexed car of main shaft, if adopt the sliding bearing in big gap can't guarantee spindle rotation accuracy again; When being roller bearings like main shaft support, though can satisfy the high rotating speed of main shaft, high-precision requirement, it is when the rolling cut large module gear, and its cutting force is very big, and rolling bearing is fragile, needs often to safeguard, can't satisfy the requirement of high rigidity.
Therefore need the high rigidity axis system of high speed of the prior art pivoting support structure to improve, to satisfy the requirement of modern gear-hobbing machine.
The utility model content
In view of this, the purpose of the utility model provides the high rigidity axis system of a kind of high speed pivoting support structure, to satisfy the job requirement to high rotating speed, high accuracy and the high rigidity of modern gear-hobbing machine main shaft.
The high rigidity axis system of the utility model high speed pivoting support structure; Comprise tool holder casing and main shaft; The leading portion of said main shaft is with the hydrostatic bearing cover that is rotatably assorted with it outward; Said hydrostatic bearing cover is fixed on the tool holder casing, is provided with the static pressure oil pocket between hydrostatic bearing cover and the main shaft, and the hydrostatic bearing cover is provided with oil inlet passage and the drainback passage that communicates with the static pressure oil pocket; The middle part of said main shaft is provided with the shaft shoulder, is provided with first thrust bearing between shaft shoulder front end face and the hydrostatic bearing cover rear end face, is provided with second thrust bearing between shaft shoulder rear end face and the tool holder casing.
Further, the leading portion of said main shaft is a truncated cone, and the endoporus of said hydrostatic bearing cover is and the identical bellmouth of main shaft leading portion tapering;
Further, the front end of said hydrostatic bearing cover is provided with sealing ring and is used for sealing ring is fixed in the back-up ring that hydrostatic bearing puts;
Further, be provided with the adjustment pad between said second thrust bearing and the tool holder casing;
Further, the back segment of said main shaft is arranged on the tool holder casing through double-row roller bearing;
Further, the import of said oil inlet passage is provided with inlet connector.
The beneficial effect of the utility model: the high rigidity axis system of the utility model high speed pivoting support structure; Through in the static pressure oil pocket, injecting cycle of higher pressure oil; Through high pressure oil film supports main shaft; Do not have the gap between big, high pressure oil film of contact area and the main shaft between high pressure oil film and main shaft, it is strong that the high pressure oil film bears main shaft radial thrust ability, can guarantee the high rigidity and the high rotating accuracy of main shaft; And the intermembranous frictional resistance pressure oil little, that circulate of main shaft and hydraulic oil can cool off main shaft and hydrostatic bearing cover; Thereby can eliminate the influence of spindle heat generation to the fit clearance and the static pressure oil pocket degree of depth of main shaft and hydrostatic bearing inner room, thus eliminate because of spindle heat generation to the influence of rotating accuracy and rigidity, satisfy the high rotating speed requirement of main shaft; The thrust bearing that is arranged at main shaft shaft shoulder two ends simultaneously can bear the axial thrust that main shaft receives, and guarantees that main shaft rotates flexibly.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Fig. 1 is the cutaway view of the high rigidity axis system of the utility model high speed pivoting support structure;
Fig. 2 is the zoomed-in view of P portion among Fig. 1.
The specific embodiment
Fig. 1 is the cutaway view of the high rigidity axis system of the utility model high speed pivoting support structure; Fig. 2 is the zoomed-in view of P portion among Fig. 1.
As shown in the figure; The high rigidity axis system of present embodiment high speed pivoting support structure; Comprise tool holder casing 1 and main shaft 2, the leading portion of said main shaft 2 is with the hydrostatic bearing cover 3 that is rotatably assorted with it outward, and said hydrostatic bearing cover 3 is fixed on the tool holder casing 1; Be provided with static pressure oil pocket 4 between hydrostatic bearing cover 3 and the main shaft 2, hydrostatic bearing cover 3 is provided with oil inlet passage 3a and the drainback passage 3b that communicates with static pressure oil pocket 4; The middle part of said main shaft 2 is provided with shaft shoulder 2a, is provided with first thrust bearing 5 between shaft shoulder front end face and the hydrostatic bearing cover rear end face, is provided with second thrust bearing 6 between shaft shoulder rear end face and the tool holder casing.
The high rigidity axis system of this high speed pivoting support structure; Inject the hydraulic oil that circulates to static pressure oil pocket 4; Come supports main shaft 2 through hydraulic oil; Do not have the gap between big, high pressure oil film of contact area and the main shaft between high pressure oil film and main shaft, it is strong that the high pressure oil film bears main shaft radial thrust ability, can guarantee the high rigidity and the high rotating accuracy of main shaft.And the intermembranous frictional resistance pressure oil little, that circulate of main shaft and hydraulic oil can cool off main shaft and hydrostatic bearing cover; Thereby can eliminate the influence of spindle heat generation to the fit clearance and the static pressure oil pocket degree of depth of main shaft and hydrostatic bearing inner room, thus eliminate because of spindle heat generation to the influence of rotating accuracy and rigidity, satisfy the high rotating speed requirement of main shaft.The thrust bearing that is arranged at main shaft shaft shoulder two ends simultaneously can bear the axial thrust that main shaft receives, and guarantees that main shaft rotates flexibly.
As the improvement to this embodiment, the leading portion of said main shaft 2 is a truncated cone, and the endoporus of said hydrostatic bearing cover 3 is and the identical bellmouth of main shaft leading portion tapering; The advantage of this structure is the end face through first thrust bearing 5 that repairs a die, the just fit clearance of the degree of depth of scalable static pressure oil pocket 4 and hydrostatic bearing cover 3 and 2 on main shaft, thus make the hydraulic oil film thickness in claimed range, to guarantee the rotating accuracy and the rigidity of main shaft; And this structure also can reduce the manufacture difficulty of this main shaft support, and convenient for maintaining.
As the improvement to this embodiment, the front end of said hydrostatic bearing cover 3 is provided with sealing ring 6 and with being used for sealing ring 6 is fixed in the back-up ring 7 on the hydrostatic bearing cover 3; Sealing ring 6 is used to prevent leak outside from the oil that the fit clearance of 2 on hydrostatic bearing cover 3 and main shaft is leaked.
As improvement to this embodiment; Be provided with adjustment pad 8 between said second thrust bearing 6 and the tool holder casing 1; Also can play the effect of the fit clearance of 2 on the degree of depth of regulating joint static pressure oil pocket 4 and hydrostatic bearing cover 3 and main shaft through the adjustment pad 8 that repairs a die, also be convenient to adjust assembly precision.
As the improvement to this embodiment, the back segment of said main shaft 2 is arranged on the tool holder casing 1 through double-row roller bearing 9, and the ability of double-row roller bearing bearing radial force is strong, can further satisfy the high rigidity requirement of main shaft.
As the improvement to this embodiment, the import of said oil inlet passage 3a is provided with inlet connector 10, conveniently fuel feeding in static pressure oil pocket 4.
Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model; And not breaking away from the aim and the scope of the utility model technical scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (6)
1. the high rigidity axis system of high speed pivoting support structure; Comprise tool holder casing and main shaft; It is characterized in that: the leading portion of said main shaft is with the hydrostatic bearing cover that is rotatably assorted with it outward; Said hydrostatic bearing cover is fixed on the tool holder casing, is provided with the static pressure oil pocket between hydrostatic bearing cover and the main shaft, and the hydrostatic bearing cover is provided with oil inlet passage and the drainback passage that communicates with the static pressure oil pocket; The middle part of said main shaft is provided with the shaft shoulder, is provided with first thrust bearing between shaft shoulder front end face and the hydrostatic bearing cover rear end face, is provided with second thrust bearing between shaft shoulder rear end face and the tool holder casing.
2. the high rigidity axis system of high speed according to claim 1 pivoting support structure, it is characterized in that: the leading portion of said main shaft is a truncated cone, the endoporus of said hydrostatic bearing cover is and the identical bellmouth of main shaft leading portion tapering.
3. the high rigidity axis system of high speed according to claim 1 and 2 pivoting support structure is characterized in that: the front end of said hydrostatic bearing cover is provided with sealing ring and is used for sealing ring is fixed in the back-up ring that hydrostatic bearing puts.
4. the high rigidity axis system of high speed according to claim 3 pivoting support structure is characterized in that: be provided with the adjustment pad between said second thrust bearing and the tool holder casing.
5. the high rigidity axis system of high speed according to claim 4 pivoting support structure, it is characterized in that: the back segment of said main shaft is arranged on the tool holder casing through double-row roller bearing.
6. the high rigidity axis system of high speed according to claim 5 pivoting support structure, it is characterized in that: the import of said oil inlet passage is provided with inlet connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120562788 CN202367214U (en) | 2011-12-29 | 2011-12-29 | Pivoting support structure of high-speed and high-rigidity main shaft system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120562788 CN202367214U (en) | 2011-12-29 | 2011-12-29 | Pivoting support structure of high-speed and high-rigidity main shaft system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202367214U true CN202367214U (en) | 2012-08-08 |
Family
ID=46590938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120562788 Expired - Lifetime CN202367214U (en) | 2011-12-29 | 2011-12-29 | Pivoting support structure of high-speed and high-rigidity main shaft system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202367214U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513555A (en) * | 2011-12-29 | 2012-06-27 | 重庆机床(集团)有限责任公司 | High-speed and high-rigidity main shaft system rotary support structure |
| CN105108182A (en) * | 2015-10-10 | 2015-12-02 | 湖南汉诺科技有限公司 | High-precision static-pressure main shaft |
-
2011
- 2011-12-29 CN CN 201120562788 patent/CN202367214U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513555A (en) * | 2011-12-29 | 2012-06-27 | 重庆机床(集团)有限责任公司 | High-speed and high-rigidity main shaft system rotary support structure |
| CN105108182A (en) * | 2015-10-10 | 2015-12-02 | 湖南汉诺科技有限公司 | High-precision static-pressure main shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120808 |