CN103423401B - The high rigidity fixed bearing draw-off mechanism of ball screw - Google Patents
The high rigidity fixed bearing draw-off mechanism of ball screw Download PDFInfo
- Publication number
- CN103423401B CN103423401B CN201310392813.5A CN201310392813A CN103423401B CN 103423401 B CN103423401 B CN 103423401B CN 201310392813 A CN201310392813 A CN 201310392813A CN 103423401 B CN103423401 B CN 103423401B
- Authority
- CN
- China
- Prior art keywords
- bearing
- ball screw
- supporting sleeve
- thrust
- shaft end
- 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
Links
Abstract
The invention discloses the high rigidity fixed bearing draw-off mechanism of a kind of ball screw, be arranged on the shaft end of ball screw, it comprises radial bearing, bearing housing, bearing support, supporting sleeve and two thrust-bearings and be used for tractive ball screw and make the pulling equipment of its axial tension stress, bearing housing is arranged in bearing support, and bearing housing has bearing hole, radial bearing close-fitting is in bearing hole, and this radial bearing is also fixedly set on shaft end, thrust-bearing all has retainer ring and turning collar, two thrust-bearings are positioned at the both sides of radial bearing, and corresponding to the bearing housing both sides respectively bearing hole end face of its retainer ring fits tightly, a turning collar corresponding supporting sleeve respectively of each thrust-bearing, and turning collar is fixedly connected on corresponding supporting sleeve, supporting sleeve is also installed on shaft end.The present invention can not only improve support stiffness, and can compensate thermal distortion at any time, improves machine tool accuracy stability.
Description
Technical field
The present invention relates to the high rigidity fixed bearing draw-off mechanism of a kind of ball screw, belong to advanced equipment manufacturing technical field, be mainly used in high-precision numerical control machine, be also applicable on the pivoting support of the rod members such as similar ball screw.
Background technique
At present, radial thrust bearing fixed bearing commonly used by ball screw, supporting width is little, rigidity is low, vibration resistance is poor, direct positioning precision, repetitive positioning accuracy and the positional accuracy affecting lathe is with the stability etc. of load variations, tractive pretension is not had to only have the fixed supported ball screw of high rigidity, helical pitch varies with temperature sensitivity, and precision stability is poor.High-precision numerical control machine, needs high rigidity servo actuator, and ball screw support mechanism is one of most important link.
Summary of the invention
Technical problem to be solved by this invention is the defect overcoming prior art, and provide a kind of ball screw high rigidity fixed bearing draw-off mechanism, it can not only improve support stiffness, and can compensate thermal distortion at any time, improves machine tool accuracy stability.
In order to solve the problems of the technologies described above, technological scheme of the present invention is: the high rigidity fixed bearing draw-off mechanism of a kind of ball screw, be arranged on the shaft end of ball screw, it comprises radial bearing, bearing housing, bearing support, supporting sleeve and two thrust-bearings and be used for tractive ball screw and make the pulling equipment of its axial tension stress, bearing housing is arranged in bearing support, and bearing housing has bearing hole, radial bearing close-fitting is in bearing hole, and this radial bearing is also fixedly set on shaft end, thrust-bearing all has retainer ring and turning collar, two thrust-bearings are positioned at the both sides of radial bearing, and corresponding to the bearing housing both sides respectively bearing hole end face of its retainer ring fits tightly, a turning collar corresponding supporting sleeve respectively of each thrust-bearing, and turning collar is fixedly connected on corresponding supporting sleeve, supporting sleeve is also installed on shaft end.
Further, the shaft end of described ball screw is set with fixed cover, and shaft end has also been threaded connection locking nut, fixed cover is also arranged in bearing support, described shaft end has axle rank, the side of fixed cover is connected on axle rank, and opposite side and one of them supporting sleeve abut against, and side and the another one supporting sleeve of described locking nut abut against.
Further, described pulling equipment comprises tractive cover, tractive screw and gap spacer, described tractive cover is connected with bearing housing by tractive screw, and leave pressure adjusting play between described tractive cover and bearing support, described gap spacer is positioned at pressure adjusting play.
Further, described fixed cover and the contact position of bearing support are provided with rotary seal ring.
Further, described bearing support and bearing housing all have gap lubricating bearings oil duct.
Have employed technique scheme, the present invention has following beneficial effect:
1, the present invention's thrust-bearing+radial bearing+thrust-bearing combination fixed bearing ball screw, bear radial force and bidirectional axial force, radial force is delivered to bearing housing, bearing support by radial bearing between two parties, the retainer ring of two thrust-bearings that radial bearing both sides are arranged is close to bearing housing 8 inner bearing hole end surface, transmit bidirectional axial force, the mechanical properties such as support stiffness are good, and bearing capacity is large, precision is high, correlated parts manufacturing process performance is good, compact structure.
2, pulling equipment tractive ball screw makes its tension stress, can compensate thermal distortion at any time, and maintenance leading screw length is constant, helical pitch is constant, improves machine tool accuracy stability.Pulling equipment pulls bearing housing by the tractive screw tightened tractive and put until eliminate the gap with tractive inner room completely, tensile stress is applied to ball screw, compensate leading screw thermal distortion, the thickness that can also change gap spacer as required changes the size of pressure adjusting play, the tensile stress size putting on ball screw can be changed, ensure machine tool accuracy stability.
3, bearing support and bearing housing have gap lubricating bearings oil duct, be used for improving the lubricity of radial bearing and thrust-bearing, improve its life-span.
4, bearing and external world's rotary seal ring dust-proof, can effective life-saving.
Accompanying drawing explanation
Fig. 1 is the structural representation of ball screw of the present invention with high rigidity fixed bearing draw-off mechanism.
Embodiment
In order to make content of the present invention more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation.
As shown in Figure 1, the high rigidity fixed bearing draw-off mechanism of a kind of ball screw, be arranged on the shaft end 10 of ball screw, it comprises radial bearing 3, bearing housing 8, bearing support 9, supporting sleeve 1 and two thrust-bearings 2 and be used for tractive ball screw and make the pulling equipment of its axial tension stress, bearing housing 8 is arranged in bearing support 9, and bearing housing 8 has bearing hole, radial bearing 3 close-fitting is in bearing hole, and this radial bearing 3 is also fixedly set on shaft end 10, thrust-bearing 2 all has retainer ring 2-1 and turning collar 2-2, two thrust-bearings 2 are positioned at the both sides of radial bearing 3, and corresponding to the bearing housing 8 both sides respectively bearing hole end face 8-1 of its retainer ring 2-1 fits tightly, a turning collar 2-2 corresponding supporting sleeve 1 respectively of each thrust-bearing 2, and turning collar 2-2 is fixedly connected on corresponding supporting sleeve 1, supporting sleeve 1 is also installed on shaft end 10 by driving key and rotates together with shaft end 10.The width of radial bearing 3 is slightly less than the bearing hole degree of depth of installing in bearing housing 8 and holding radial bearing 3.The present invention's thrust-bearing 2+ radial bearing 3+ thrust-bearing 2 combines fixed bearing ball screw, bear radial force and bidirectional axial force, radial force is delivered to bearing housing 8, bearing support 9 by radial bearing 3 between two parties, the retainer ring 2-1 of two thrust-bearings 2 that radial bearing 3 both sides are arranged is close to bearing housing 8 inner bearing hole end surface, transmit bidirectional axial force, the mechanical properties such as support stiffness are good, and bearing capacity is large, precision is high, correlated parts manufacturing process performance is good, compact structure.
As shown in Figure 1, the shaft end 10 of ball screw is set with fixed cover 11, and shaft end 10 has also been threaded connection locking nut 6, fixed cover 11 is also arranged in bearing support 9, shaft end 10 has axle rank 10-1, the side of fixed cover 11 is connected on the 10-1 of axle rank, and opposite side and one of them supporting sleeve 1 abut against, and side and the another one supporting sleeve 1 of locking nut 6 abut against.Supporting sleeve 1, the thrust-bearing 2 on right side, bearing housing 8, the thrust-bearing 2 in left side, the supporting sleeve 1 in left side, the fixed cover 11 of locking nut 6 successively on the right side of push-tight, make its dieback on the axle rank 10-1 of ball screw, to thrust-bearing 2 suitably pretension.
As shown in Figure 1, pulling equipment comprises tractive cover 5, tractive screw and gap spacer 7, tractive cover 5 is connected with bearing housing 8 by tractive screw, and leave pressure adjusting play between tractive cover 5 and bearing support 9, gap spacer 7 is positioned at pressure adjusting play.The present invention on request reserved bearing housing 8 and tractive overlap 5 between gap, the gap spacer 7 manufacturing same thickness fills in pressure adjusting play, the tractive screw tightened on tractive cover 5 pulls bearing housing 8 until elimination and tractive overlap the gap between 5 completely, tensile stress is applied to ball screw, compensate leading screw thermal distortion, maintain ball screw helical pitch constant, thus ensure machine tool accuracy stability, in addition, the tensile stress size putting on ball screw can also can be changed by the thickness changing gap spacer 7, gap of the present invention spacer 7 can adopt half gap spacer 7 of a pair symmetry to form.
In order to carry out dust-proof process, effectively extend its life-span, as shown in Figure 1, fixed cover 11 is provided with rotary seal ring 12 with the contact position of bearing support 9.
In order to the lubricity of radial bearing 3 and thrust-bearing 2 can be improved, improve its life-span, bearing support 9 and bearing housing 8 all have gap lubricating bearings oil duct.
Above-described specific embodiment; technical problem, technological scheme and beneficial effect that the present invention solves are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the high rigidity fixed bearing draw-off mechanism of ball screw, be arranged on the shaft end (10) of ball screw, it is characterized in that: it comprises radial bearing (3), bearing housing (8), bearing support (9), supporting sleeve (1) and two thrust-bearings (2) and be used for tractive ball screw and make the pulling equipment of its axial tension stress, bearing housing (8) is arranged in bearing support (9), and bearing housing (8) has bearing hole, radial bearing (3) close-fitting is in bearing hole, and this radial bearing (3) is also fixedly set on shaft end (10), thrust-bearing (2) all has retainer ring (2-1) and turning collar (2-2), two thrust-bearings (2) are positioned at the both sides of radial bearing (3), and its retainer ring (2-1) is respectively with bearing housing (8) both sides, and corresponding bearing hole end face (8-1) fits tightly, turning collar (2-2) corresponding supporting sleeve (1) respectively of each thrust-bearing (2), and turning collar (2-2) is fixedly connected on corresponding supporting sleeve (1), supporting sleeve (1) is also installed on shaft end (10), described pulling equipment comprises tractive cover (5), tractive screw and gap spacer (7), described tractive cover (5) is connected with bearing housing (8) by tractive screw, leave pressure adjusting play between described tractive cover (5) and bearing support (9), described gap spacer (7) is positioned at pressure adjusting play.
2. the high rigidity fixed bearing draw-off mechanism of ball screw according to claim 1, it is characterized in that: the shaft end (10) of described ball screw is set with fixed cover (11), and shaft end (10) is also threaded connection locking nut (6), fixed cover (11) is also arranged in bearing support (9), described shaft end (10) has axle rank (10-1), the side of fixed cover (11) is connected on axle rank (10-1), opposite side and one of them supporting sleeve (1) abut against, side and the another one supporting sleeve (1) of described locking nut (6) abut against.
3. the high rigidity fixed bearing draw-off mechanism of ball screw according to claim 2, is characterized in that: described fixed cover (11) is provided with rotary seal ring (12) with the contact position of bearing support (9).
4. the high rigidity fixed bearing draw-off mechanism of ball screw according to claim 1, is characterized in that: described bearing support (9) and bearing housing (8) all have gap lubricating bearings oil duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310392813.5A CN103423401B (en) | 2013-09-03 | 2013-09-03 | The high rigidity fixed bearing draw-off mechanism of ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310392813.5A CN103423401B (en) | 2013-09-03 | 2013-09-03 | The high rigidity fixed bearing draw-off mechanism of ball screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103423401A CN103423401A (en) | 2013-12-04 |
| CN103423401B true CN103423401B (en) | 2015-11-04 |
Family
ID=49648584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310392813.5A Expired - Fee Related CN103423401B (en) | 2013-09-03 | 2013-09-03 | The high rigidity fixed bearing draw-off mechanism of ball screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103423401B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108581582A (en) * | 2018-06-25 | 2018-09-28 | 中山市捷上同程数控机床有限公司 | A kind of lead screw pretension fixing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4227366A1 (en) * | 1992-08-19 | 1994-02-24 | Schaeffler Waelzlager Kg | Bearing with dampened vibrations esp. for machine tool - has two bearing elements rotatable relative to each other across at least one radial bearing and in at least one axial direction are located fixed to each other by axial bearing |
| CN1152084A (en) * | 1995-12-13 | 1997-06-18 | 西门子公司 | Axial force controlled firction clutch for leading screw driving device |
| EP1252969A1 (en) * | 2001-04-25 | 2002-10-30 | Tornos S.A. | Anti - shock screw unit |
| CN203442065U (en) * | 2013-09-03 | 2014-02-19 | 常州机电职业技术学院 | High-rigidity fixed bearing and drawing mechanism for ball screw |
-
2013
- 2013-09-03 CN CN201310392813.5A patent/CN103423401B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4227366A1 (en) * | 1992-08-19 | 1994-02-24 | Schaeffler Waelzlager Kg | Bearing with dampened vibrations esp. for machine tool - has two bearing elements rotatable relative to each other across at least one radial bearing and in at least one axial direction are located fixed to each other by axial bearing |
| CN1152084A (en) * | 1995-12-13 | 1997-06-18 | 西门子公司 | Axial force controlled firction clutch for leading screw driving device |
| EP1252969A1 (en) * | 2001-04-25 | 2002-10-30 | Tornos S.A. | Anti - shock screw unit |
| CN203442065U (en) * | 2013-09-03 | 2014-02-19 | 常州机电职业技术学院 | High-rigidity fixed bearing and drawing mechanism for ball screw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103423401A (en) | 2013-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102166720B (en) | Structural support of ball screw assembly | |
| CN102139447B (en) | Fully-fixed screw rod prestretching mechanism | |
| CN103158025B (en) | A kind of bearing integral supporting structure for ball-screw support end | |
| CN201314333Y (en) | Combination bearing of cylindrical roller and double-direction thrust roller | |
| WO2014013754A1 (en) | Angular contact ball bearing and duplex bearing | |
| CN201815913U (en) | Feed system of numerically controlled lathe with quantitative pre-tightening function of lead screw | |
| CN203442065U (en) | High-rigidity fixed bearing and drawing mechanism for ball screw | |
| CN103423401B (en) | The high rigidity fixed bearing draw-off mechanism of ball screw | |
| US11473620B2 (en) | Rolling bearing precompression method, bearing precompression device, bearing assembly, machine, and vehicle | |
| CN103438093B (en) | Ball screw special bearing height rigidity bearing draw-off mechanism | |
| CN203926773U (en) | One can auto-compensation associated sealing arrangement for bearings | |
| CN203441969U (en) | Special bearing high-rigidity supporting and towing mechanism for ball screw | |
| RU2465986C1 (en) | Spindle assembly | |
| CN101602172A (en) | A kind of leading screw supporting construction and adopt the leading screw prestretched method of this supporting construction | |
| CN109027002B (en) | High-speed floating ring bearing and rotor system supporting mode | |
| CN204339412U (en) | A kind of ball-screw end spring bearing configuration structure of high speed feed axle | |
| JP2008110426A (en) | Spindle device | |
| CN102825268A (en) | Transmission main shaft structure of numerical control drilling and milling machine | |
| CN108637770A (en) | A kind of drive mechanism reducing Thermal Error | |
| CN106640949A (en) | Double-row angular contact ball bearing | |
| CN101758456A (en) | Vertical dynamic/static piezoelectric main shaft | |
| CN104526435A (en) | Ball screw end support bearing arranging structure of high-speed feed shaft | |
| CN204603915U (en) | Ball screw integral bearing mechanism | |
| CN202804800U (en) | Gantry screw pretensioning device | |
| CN219484218U (en) | Numerical control turning milling cutting machine tool metal main shaft part |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190425 Address after: 721000 Caijiapo Economic Development Zone, Qishan County, Baoji City, Shaanxi Province Patentee after: Qishan North Machinery Co., Ltd. Address before: 213164 No. 6 Mingxin East Road, Wujin District, Changzhou City, Jiangsu Province Patentee before: Changzhou Institute of Mechatronic Technology |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 Termination date: 20190903 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |