CN103423401A - High-rigidity fixed bearing drawing mechanism for ball screw - Google Patents
High-rigidity fixed bearing drawing mechanism for ball screw Download PDFInfo
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- CN103423401A CN103423401A CN2013103928135A CN201310392813A CN103423401A CN 103423401 A CN103423401 A CN 103423401A CN 2013103928135 A CN2013103928135 A CN 2013103928135A CN 201310392813 A CN201310392813 A CN 201310392813A CN 103423401 A CN103423401 A CN 103423401A
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- tractive
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- 230000007246 mechanism Effects 0.000 title claims abstract description 16
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 230000000875 corresponding effect Effects 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001133184 Colletotrichum agaves Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The invention discloses a high-rigidity fixed bearing drawing mechanism for a ball screw. The high-rigidity fixed bearing drawing mechanism is arranged at the shaft end of the ball screw and comprises a radial bearing, a bearing sleeve, a bearing seat, supporting sleeves, two thrust bearings and a drawing device, wherein the drawing device is used for drawing the ball screw to axially receive tensile stress; the bearing sleeve is arranged in the bearing seat; a bearing hole is formed in the bearing sleeve; the radial bearing is tightly arranged in the bearing hole in a matching way and is fixedly sleeved at the shaft end; each thrust bearing is provided with a fixed ring and a rotary ring; the two thrust bearings are positioned on two sides of the radial bearing; the fixed rings of the thrust bearings are tightly attached to the corresponding bearing hole end surfaces on two sides of the bearing sleeve respectively; the rotary ring of each thrust bearing corresponds to a supporting sleeve and is fixedly connected to the corresponding supporting sleeve; the supporting sleeves are fixedly arranged at the shaft end. By the adoption of the high-rigidity fixed bearing drawing mechanism for the ball screw, the bearing rigidity can be improved, thermal deformation can be compensated at any time, and the accuracy and stability of a machine tool are improved.
Description
Technical field
The present invention relates to high rigidity fixed bearing draw-off mechanism for a kind of ball screw, belong to the advanced equipment manufacturing technical field, be mainly used in high-precision numerical control machine, also be applicable on the pivoting support of the rod members such as similar ball screw.
Background technique
At present, ball screw is commonly used the radial thrust bearing fixed bearing, supporting width is little, rigidity is low, vibration resistance is poor, positioning precision, repetitive positioning accuracy and the positional accuracy that directly affects lathe is with stability of load variations etc., do not have the tractive pretension 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, need high rigidity servo actuator, and the 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 that overcomes prior art, and high rigidity fixed bearing draw-off mechanism for a kind of ball screw is provided, and it not only can improve support stiffness, and can compensate at any time thermal distortion, improves machine tool accuracy stability.
In order to solve the problems of the technologies described above, technological scheme of the present invention is: high rigidity fixed bearing draw-off mechanism for 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 the 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, the radial bearing close-fitting is in bearing hole, and this radial bearing also is 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 its retainer ring fits tightly with the corresponding bearing hole end face in bearing housing both sides respectively, the respectively corresponding supporting sleeve of the turning collar of each thrust-bearing, and turning collar is fixedly connected on corresponding supporting sleeve, supporting sleeve also is installed on shaft end.
Further, be set with fixed cover on the shaft end of described ball screw, and also be threaded connection locking nut on shaft end, fixed cover also is arranged in bearing support, described shaft end has the axle rank, one side of fixed cover is connected on the axle rank, and opposite side and one of them supporting sleeve connect, and a side and the another one supporting sleeve of described locking nut connect.
Further, described pulling equipment comprises tractive cover, tractive screw and gap spacer, described tractive cover is connected with bearing housing by the tractive screw, between described tractive cover and bearing support, leaves the pressure adjusting play, and described gap spacer is positioned at the pressure adjusting play.
Further, the contact position of described fixed cover and bearing support is provided with rotary seal ring.
Further, all have gap lubricating bearings oil duct on described bearing support and bearing housing.
Adopted technique scheme, the present invention has following beneficial effect:
1, thrust-bearing+radial bearing for the present invention+thrust-bearing combination fixed bearing ball screw, bearing radial force and bidirectional axial force, radial bearing is delivered to radial force bearing housing, bearing support between two parties, the retainer ring of two thrust-bearings that the radial bearing both sides are arranged is close to bearing housing 8 inner bearing hole end surfaces, 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 at any time thermal distortion, maintains that leading screw length is constant, helical pitch is constant, improves machine tool accuracy stability.Pulling equipment pulls bearing housing by the tractive screw of tightening tractive and putting until eliminate the gap with the tractive inner room fully, apply tensile stress to ball screw, the thermal distortion of compensation leading screw, the thickness that can also change as required the gap spacer changes the size of pressure adjusting play, can change the tensile stress size that puts on ball screw, guarantee machine tool accuracy stability.
3, have gap lubricating bearings oil duct on bearing support and bearing housing, be used for improving the lubricity of radial bearing and thrust-bearing, improve its life-span.
4, bearing and extraneous dustproof with rotary seal ring, effectively life-saving.
The 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
For content of the present invention more easily is expressly 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, high rigidity fixed bearing draw-off mechanism for 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 the 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-fittings are in bearing hole, and this radial bearing 3 also is 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 fits tightly with bearing housing 8 both sides corresponding bearing hole end face 8-1 respectively, the respectively corresponding supporting sleeve 1 of the turning collar 2-2 of each thrust-bearing 2, and turning collar 2-2 is fixedly connected on corresponding supporting sleeve 1, supporting sleeve 1 also is installed on shaft end 10 and rotates together with shaft end 10 by driving key.The width of radial bearing 3 is slightly less than the bearing hole degree of depth that radial bearing 3 is held in the interior installation of bearing housing 8.Thrust-bearing 2+ radial bearing 3+ thrust-bearing 2 combination fixed bearing ball screws for the present invention, bearing radial force and bidirectional axial force, radial bearing 3 is delivered to radial force bearing housing 8, bearing support 9 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 surfaces, 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, be set with fixed cover 11 on the shaft end 10 of ball screw, and also be threaded connection locking nut 6 on shaft end 10, fixed cover 11 also is arranged in bearing support 9, shaft end 10 has axle rank 10-1, it is upper that one side of fixed cover 11 is connected to axle rank 10-1, and opposite side and one of them supporting sleeve 1 connect, and a side and the another one supporting sleeve 1 of locking nut 6 connect.Locking nut 6 is 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 on push-tight right side successively, makes its dieback on the 10-1 of the axle rank of ball screw, gives the suitable pretension of thrust-bearing 2.
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 the tractive screw, between tractive cover 5 and bearing support 9, leaves the pressure adjusting play, and gap spacer 7 is positioned at the pressure adjusting play.The present invention is reserved bearing housing 8 and 5 gaps of tractive cover on request, manufacture the gap spacer 7 of same thickness and fill in the pressure adjusting play, tighten tractive screw on tractive cover 5 and pull bearing housing 8 until eliminate overlap the gap of 5 with tractive fully, apply tensile stress to ball screw, the thermal distortion of compensation leading screw, maintain the ball screw helical pitch constant, thereby guarantee machine tool accuracy stability, in addition, can also can change the tensile stress size that puts on ball screw by the thickness that changes gap spacer 7, gap of the present invention spacer 7 can adopt half gap spacer 7 of a pair of symmetry to form.
For the processing of preventing dust, 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 improve the lubricity of radial bearing 3 and thrust-bearing 2, improve its life-span, all have gap lubricating bearings oil duct on bearing support 9 and bearing housing 8.
Above-described specific embodiment; technical problem, technological scheme and beneficial effect that the present invention is solved further describe; institute is 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 modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a high rigidity fixed bearing draw-off mechanism for 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 the 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) also is 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) fits tightly with bearing housing (8) the corresponding bearing hole end faces in both sides (8-1) respectively, the respectively corresponding supporting sleeve (1) of the turning collar (2-2) of each thrust-bearing (2), and turning collar (2-2) is fixedly connected on corresponding supporting sleeve (1), supporting sleeve (1) also is installed on shaft end (10).
2. high rigidity fixed bearing draw-off mechanism for ball screw according to claim 1, it is characterized in that: be set with fixed cover (11) on the shaft end of described ball screw (10), and also be threaded connection locking nut (6) on shaft end (10), fixed cover (11) also is arranged in bearing support (9), described shaft end (10) has axle rank (10-1), one side of fixed cover (11) is connected on axle rank (10-1), opposite side and one of them supporting sleeve (1) connect, one side of described locking nut (6) and another one supporting sleeve (1) connect.
3. high rigidity fixed bearing draw-off mechanism for ball screw according to claim 1 and 2, it is characterized in that: described pulling equipment comprises tractive cover (5), tractive screw and gap spacer (7), described tractive cover (5) is connected with bearing housing (8) by the tractive screw, leave the pressure adjusting play between described tractive cover (5) and bearing support (9), described gap spacer (7) is positioned at the pressure adjusting play.
4. high rigidity fixed bearing draw-off mechanism for 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).
5. high rigidity fixed bearing draw-off mechanism for ball screw according to claim 1, is characterized in that: on 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 true CN103423401A (en) | 2013-12-04 |
| CN103423401B CN103423401B (en) | 2015-11-04 |
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| 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 |
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| CN (1) | CN103423401B (en) |
Cited By (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 |
Cited By (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 |
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| Publication number | Publication date |
|---|---|
| CN103423401B (en) | 2015-11-04 |
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Effective date of registration: 20190425 Address after: 721000 Caijiapo Economic Development Zone, Qishan County, Baoji City, Shaanxi Province Patentee after: QISHAN NORTH MACHINE Co.,Ltd. Address before: 213164 No. 6 Mingxin East Road, Wujin District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU VOCATIONAL INSTITUTE OF MECHATRONIC TECHNOLOGY |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 Termination date: 20190903 |