CN102513555A - High-speed and high-rigidity main shaft system rotary support structure - Google Patents
High-speed and high-rigidity main shaft system rotary support structure Download PDFInfo
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- CN102513555A CN102513555A CN2011104505425A CN201110450542A CN102513555A CN 102513555 A CN102513555 A CN 102513555A CN 2011104505425 A CN2011104505425 A CN 2011104505425A CN 201110450542 A CN201110450542 A CN 201110450542A CN 102513555 A CN102513555 A CN 102513555A
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- main shaft
- static pressure
- support structure
- pressure oil
- hydrostatic bearing
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Abstract
The invention discloses a high-speed and high-rigidity main shaft system rotary support structure, which comprises a cutter frame casing and a main shaft, wherein a static pressure bearing sleeve is sheathed outside the front section of the main shaft, a static pressure oil cavity is arranged between the static pressure bearing sleeve and the main shaft, an oil inlet passage and an oil return passage communicated with the static pressure oil cavity are arranged on the static pressure bearing sleeve, the middle of the main shaft is provided with a shaft shoulder, a first thrust bearing is arranged between the shaft shoulder and the static pressure bearing sleeve, and a second thrust bearing is arranged between the bearing shoulder and a cutter frame casing. The high-speed and high-rigidity main shaft system rotary support structure has the advantages that high-pressure circulation oil is filled into the static pressure oil cavity, no gap exists between a high-pressure oil film and the main shaft, the high-pressure oil film has high capability for bearing the radial thrust capability of the main shaft, and high rigidity and high rotary precision of the main shaft can be ensured. In addition, the friction resistance between the main shaft and the high-pressure oil film is small, the cyclically flowing pressure oil can be used for cooling the main shaft and the static pressure bearing sleeve, so the influence on the rotary precision and the rigidity during the heat generation of the main shaft can be eliminated, and the high rotating speed requirement of the main shaft is met.
Description
Technical field
The present invention 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.
Summary of the invention
In view of this, the purpose of this invention is to provide the high rigidity axis system of a kind of high speed pivoting support structure, to satisfy 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 high speed of the present invention 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.
Beneficial effect of the present invention: the high rigidity axis system of high speed of the present invention 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 present invention is further described.
Fig. 1 is the cutaway view of the high rigidity axis system of high speed of the present invention 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 high speed of the present invention 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 technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
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 |
|---|---|---|---|
| CN2011104505425A CN102513555A (en) | 2011-12-29 | 2011-12-29 | High-speed and high-rigidity main shaft system rotary support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104505425A CN102513555A (en) | 2011-12-29 | 2011-12-29 | High-speed and high-rigidity main shaft system rotary support structure |
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| CN102513555A true CN102513555A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104505425A Pending CN102513555A (en) | 2011-12-29 | 2011-12-29 | High-speed and high-rigidity main shaft system rotary support structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212739A (en) * | 2013-04-18 | 2013-07-24 | 玉环胜友工具有限公司 | Double main supporting type self-fastening drill chunk |
| CN104044066A (en) * | 2014-07-02 | 2014-09-17 | 重庆机床(集团)有限责任公司 | High-rigidity grinding main shaft system |
| CN106334871A (en) * | 2016-08-30 | 2017-01-18 | 重庆德蚨乐机械制造有限公司 | Friction welding machine and spindle force balancing assembly thereof |
| CN106840558A (en) * | 2017-01-24 | 2017-06-13 | 清华大学 | Dynamic pressure spindle rigidity testing system |
| CN114714141A (en) * | 2022-06-09 | 2022-07-08 | 北京博鲁斯潘精密机床有限公司 | High-precision aviation blade tenon machining machine tool with driving screw rod supporting structure |
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| JPH08219159A (en) * | 1995-02-08 | 1996-08-27 | Nippon Seiko Kk | Static pressure gas bearing |
| CN2772727Y (en) * | 2005-03-14 | 2006-04-19 | 上海机床厂有限公司 | Grinding machine head carriage of high-precision conical static-pressure bearing |
| CN1907648A (en) * | 2006-08-28 | 2007-02-07 | 上海机床厂有限公司 | High precision overloading composite bearing structure |
| CN201013767Y (en) * | 2007-03-05 | 2008-01-30 | 李颖仲 | Telescope-feed long cone static-kinetic pressure chief axis structure |
| JP2009068546A (en) * | 2007-09-11 | 2009-04-02 | Nsk Ltd | Spindle device |
| CN101530977A (en) * | 2009-04-10 | 2009-09-16 | 险峰机床厂 | Power high efficiency grinding head |
| CN202367214U (en) * | 2011-12-29 | 2012-08-08 | 重庆机床(集团)有限责任公司 | Pivoting support structure of high-speed and high-rigidity main shaft system |
-
2011
- 2011-12-29 CN CN2011104505425A patent/CN102513555A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08219159A (en) * | 1995-02-08 | 1996-08-27 | Nippon Seiko Kk | Static pressure gas bearing |
| CN2772727Y (en) * | 2005-03-14 | 2006-04-19 | 上海机床厂有限公司 | Grinding machine head carriage of high-precision conical static-pressure bearing |
| CN1907648A (en) * | 2006-08-28 | 2007-02-07 | 上海机床厂有限公司 | High precision overloading composite bearing structure |
| CN201013767Y (en) * | 2007-03-05 | 2008-01-30 | 李颖仲 | Telescope-feed long cone static-kinetic pressure chief axis structure |
| JP2009068546A (en) * | 2007-09-11 | 2009-04-02 | Nsk Ltd | Spindle device |
| CN101530977A (en) * | 2009-04-10 | 2009-09-16 | 险峰机床厂 | Power high efficiency grinding head |
| CN202367214U (en) * | 2011-12-29 | 2012-08-08 | 重庆机床(集团)有限责任公司 | Pivoting support structure of high-speed and high-rigidity main shaft system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212739A (en) * | 2013-04-18 | 2013-07-24 | 玉环胜友工具有限公司 | Double main supporting type self-fastening drill chunk |
| CN103212739B (en) * | 2013-04-18 | 2016-12-28 | 玉环胜友工具有限公司 | Double main supporting type self-fastening drill chunk |
| CN104044066A (en) * | 2014-07-02 | 2014-09-17 | 重庆机床(集团)有限责任公司 | High-rigidity grinding main shaft system |
| CN106334871A (en) * | 2016-08-30 | 2017-01-18 | 重庆德蚨乐机械制造有限公司 | Friction welding machine and spindle force balancing assembly thereof |
| CN106840558A (en) * | 2017-01-24 | 2017-06-13 | 清华大学 | Dynamic pressure spindle rigidity testing system |
| CN106840558B (en) * | 2017-01-24 | 2019-09-17 | 清华大学 | Dynamic pressure spindle rigidity testing system |
| CN114714141A (en) * | 2022-06-09 | 2022-07-08 | 北京博鲁斯潘精密机床有限公司 | High-precision aviation blade tenon machining machine tool with driving screw rod supporting structure |
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Application publication date: 20120627 |
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| RJ01 | Rejection of invention patent application after publication |