CN103438093A - High-rigidity support traction mechanism of bearing special for ball screw - Google Patents
High-rigidity support traction mechanism of bearing special for ball screw Download PDFInfo
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- CN103438093A CN103438093A CN2013103928366A CN201310392836A CN103438093A CN 103438093 A CN103438093 A CN 103438093A CN 2013103928366 A CN2013103928366 A CN 2013103928366A CN 201310392836 A CN201310392836 A CN 201310392836A CN 103438093 A CN103438093 A CN 103438093A
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Abstract
The invention discloses a high-rigidity support traction mechanism of a bearing special for a ball screw. The high-rigidity support traction mechanism is arranged at the shaft end part of the ball screw, wherein inner rings are fixedly sleeved at the shaft end parts of the ball screw; third rolling bodies are arranged between the inner rings and common rings; the common rings, the third rolling bodies and the inner rings form a radial bearing; first rotary rings and second rotary rings are fixedly sleeved at the shaft end parts of the ball screw; first rolling bodies are arranged between the first rotary rings and the common rings; the first rotary rings, the first rolling bodies and the common rings form thrust bearings; second rolling bodies are arranged between the second rotary rings and the common rings; the second rotary rings, the second rolling bodies and the common rings form another thrust bearing; traction sleeves are connected with the common rings through tensioning screws; tension and pressure adjusting clearances are reserved between the traction sleeves and bearing seats; adjusting pads are positioned in the tension and pressure adjusting clearances. By virtue of the high-rigidity support traction mechanism of the bearing special for the ball screw, which is provided by the invention, not only can the support rigidity be improved, but also the thermal deformation can be compensated at any time, and the accuracy and the stability of a machine tool are improved.
Description
Technical field
The present invention relates to the high rigidity bearing draw-off mechanism of a kind of ball screw special bearing, belong to the advanced equipment manufacturing technical field, it is applicable to high-precision numerical control machine, particularly high precision large-sized, heavy digital control machine tool, also can be applicable to the pivoting support of the parts such as similar ball screw, improve the strut stability of ball screw.
Background technique
At present, ball screw is commonly used general bearing fixed bearing, supporting width is little, rigidity is low, vibration resistance is poor, uncompensated, the poor heat stability of leading screw elongation, positioning precision, repetitive positioning accuracy and the positional accuracy that directly affects lathe vary with temperature, with the stability of load variations etc., high-precision numerical control machine, the servo actuator of the high rigidity of needs, highi degree of accuracy, good thermal stability, ball screw supporting draw-off 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, provides a kind of ball screw special bearing high rigidity bearing draw-off mechanism, 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: the high rigidity bearing draw-off mechanism of a kind of ball screw special bearing, be arranged on the shaft end of ball screw, it comprises the first turning collar, the second turning collar, the first rolling element, the second rolling element, public circle, bearing support, spacer, the tractive cover, the 3rd rolling element and inner ring, public circle is arranged in bearing support, inner ring is fixedly set in the shaft end of ball screw, the 3rd rolling element is arranged between inner ring and public circle, and public circle, the 3rd rolling element and inner ring form a radial bearing, the first turning collar and the second turning collar are fixedly set in the shaft end of ball screw, the first rolling element is arranged between the first turning collar and public circle, and the first turning collar, the first rolling element and public circle form a thrust-bearing, the second rolling element is arranged between the second turning collar and public circle, and the second turning collar, the second rolling element and public circle form another thrust-bearing, described tractive cover is connected with public circle by stretching screw, leave the pressure adjusting play between tractive cover and bearing support, described spacer is positioned at the pressure adjusting play.
Further, on the shaft end of described ball screw, be threaded connection locking nut, the shaft end of described ball screw also is provided with the shaft shoulder, and a side of the first turning collar is connected on the shaft shoulder, and a side and second turning collar of locking nut connect.
Further, the contact position of described the first turning collar and bearing support is provided with rotary seal ring.
Further, on described bearing support, have radial bearing and two gap oil leabs that thrust-bearing is lubricated.
Further, described the first rolling element and the second rolling element are band retainer cylindrical roller or band retainer ball.
Further, described the 3rd rolling element is needle roller or roller or ball.
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, radial bearing radial support ball screw, thrust-bearing bears bidirectional axial force, the mechanical properties such as support stiffness are good, bearing capacity is large, precision is high, correlated parts manufacturing process performance is good, compact structure.
2, by the public circle of spacer tractive, the pretension ball screw, can compensate thermal distortion at any time, maintains that leading screw length is constant, helical pitch is constant, improves machine tool accuracy stability.The tractive cover by tightening stretching screw and pulling public circle 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 on bearing support radial bearing and two gap oil leabs that thrust-bearing is lubricated, 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.
5, the retainer ring of the outer ring of radial bearing and two thrust-bearings is public, has reduced number of spare parts, is easy to Seriation Design and batch production.
The accompanying drawing explanation
The structural representation that Fig. 1 is the high rigidity bearing draw-off mechanism of ball screw special bearing of the present invention.
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, the high rigidity bearing draw-off mechanism of a kind of ball screw special bearing, be arranged on the shaft end 8 of ball screw, it comprises the first turning collar 1-1, the second turning collar 1-2, the first rolling element 2-1, the second rolling element 2-2, public circle 3, bearing support 4, spacer 5, tractive cover 6, the 3rd rolling element 9 and inner ring 10, public circle 3 is arranged in bearing support 4, inner ring 10 is fixedly set in the shaft end 8 of ball screw, the 3rd rolling element 9 is arranged between inner ring 10 and public circle 3, and public circle 3, the 3rd rolling element 9 and inner ring 10 form a radial bearing, the first turning collar 1-1 and the second turning collar 1-2 are fixedly set in the shaft end 8 of ball screw, the first rolling element 2-1 is arranged between the first turning collar 1-1 and public circle 3, and the first turning collar 1-1, the first rolling element 2-1 and public circle 3 form a thrust-bearing, the second rolling element 2-2 is arranged between the second turning collar 1-2 and public circle 3, and the second turning collar 1-2, the second rolling element 2-2 and public circle 3 form another thrust-bearing, described tractive cover 6 is connected with public circle 3 by stretching screw, leave the pressure adjusting play between tractive cover 6 and bearing support 4, described spacer 5 is positioned at the pressure adjusting play, spacer 5 can be comprised of two and half spacers, press the thickness of computational manufacturing two and half spacers, behind the gap of calculating between reserved public circle 3 and tractive cover 6, fill in respectively half spacer from both sides, stretching screw on fastening tractive cover 6, eliminate the gap between public circle 3 and tractive cover 6 fully, to ball screw, apply pretightening force.Thrust-bearing+radial bearing for the present invention+thrust-bearing combination fixed bearing ball screw, radial bearing radial support ball screw, thrust-bearing bears bidirectional axial force, and the mechanical properties such as support stiffness are good, bearing capacity is large, precision is high, correlated parts manufacturing process performance is good, compact structure.
As shown in Figure 1, be threaded connection locking nut 7 on the shaft end 8 of ball screw, the shaft end of ball screw also is provided with shaft shoulder 8-1, the side of the first turning collar 1-1 is connected on shaft shoulder 8-1, one side of locking nut 7 and the second turning collar 1-2 connect, locking nut 7 is push-tight the second turning collar 1-2, the second rolling element 2-2, public circle 3, the first rolling element 2-1, the second turning collar 1-1 successively, makes its dieback on the shaft shoulder 8-1 of ball screw, and give two suitable pretensions of thrust-bearing.
For the processing of preventing dust, effectively extend its life-span, as shown in Figure 1, the contact position of the first turning collar 1-1 and bearing support 4 is provided with rotary seal ring 11.
In order to improve the lubricity of radial bearing and thrust-bearing, improve its life-span, on bearing support 4, have radial bearing and two gap oil leabs that thrust-bearing is lubricated.
The first rolling element 2-1 and the second rolling element 2-2 are band retainer cylindrical roller or band retainer ball, but are not limited to this.
The 3rd rolling element is needle roller or roller or ball, but is not limited to this.
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 (6)
1. the high rigidity bearing draw-off mechanism of ball screw special bearing, be arranged on the shaft end (8) of ball screw, it is characterized in that: it comprises the first turning collar (1-1), the second turning collar (1-2), the first rolling element (2-1), the second rolling element (2-2), public circle (3), bearing support (4), spacer (5), tractive cover (6), the 3rd rolling element (9) and inner ring (10), public circle (3) is arranged in bearing support (4), inner ring (10) is fixedly set in the shaft end (8) of ball screw, the 3rd rolling element (9) is arranged between inner ring (10) and public circle (3), and public circle (3), the 3rd rolling element (9) and inner ring (10) form a radial bearing, the first turning collar (1-1) and the second turning collar (1-2) are fixedly set in the shaft end (8) of ball screw, the first rolling element (2-1) is arranged between the first turning collar (1-1) and public circle (3), and the first turning collar (1-1), the first rolling element (2-1) and public circle (3) form a thrust-bearing, the second rolling element (2-2) is arranged between the second turning collar (1-2) and public circle (3), and the second turning collar (1-2), the second rolling element (2-2) and public circle (3) form another thrust-bearing, described tractive cover (6) is connected with public circle (3) by stretching screw, leave the pressure adjusting play between tractive cover (6) and bearing support (4), described spacer (5) is positioned at the pressure adjusting play.
2. the high rigidity bearing draw-off mechanism of ball screw special bearing according to claim 1, it is characterized in that: be threaded connection locking nut (7) on the shaft end of described ball screw (8), the shaft end of described ball screw also is provided with the shaft shoulder (8-1), it is upper that one side of the first turning collar (1-1) is connected to the shaft shoulder (8-1), and a side of locking nut (7) and the second turning collar (1-2) connect.
3. the high rigidity bearing draw-off mechanism of ball screw special bearing according to claim 1 and 2 is characterized in that: described the first turning collar (1-1) is provided with rotary seal ring (11) with the contact position of bearing support (4).
4. the high rigidity bearing draw-off mechanism of ball screw special bearing according to claim 1 and 2, is characterized in that: on described bearing support (4), have radial bearing and two gap oil leabs that thrust-bearing is lubricated.
5. the high rigidity bearing draw-off mechanism of ball screw special bearing according to claim 1 and 2 is characterized in that: described the first rolling element (2-1) and the second rolling element (2-2) are band retainer cylindrical roller or band retainer ball.
6. the high rigidity bearing draw-off mechanism of ball screw special bearing according to claim 1 and 2, it is characterized in that: described the 3rd rolling element (9) is needle roller or roller or ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310392836.6A CN103438093B (en) | 2013-09-03 | 2013-09-03 | Ball screw special bearing height rigidity bearing draw-off mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310392836.6A CN103438093B (en) | 2013-09-03 | 2013-09-03 | Ball screw special bearing height rigidity bearing draw-off mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103438093A true CN103438093A (en) | 2013-12-11 |
| CN103438093B CN103438093B (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310392836.6A Active CN103438093B (en) | 2013-09-03 | 2013-09-03 | Ball screw special bearing height rigidity bearing draw-off mechanism |
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| CN (1) | CN103438093B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194996A (en) * | 2016-07-26 | 2016-12-07 | 成都普瑞斯数控机床有限公司 | Screw mandrel bearing fixed mechanism |
| CN113606303A (en) * | 2021-07-30 | 2021-11-05 | 武汉新威奇科技有限公司 | Axial precise clearance control structure and method for heavy-load ball screw of press machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0157914B1 (en) * | 1984-02-29 | 1988-01-20 | INA Wälzlager Schaeffler KG | Roller bearing for a screw spindle |
| JP3929345B2 (en) * | 2001-04-24 | 2007-06-13 | アクチボラゲット エス ケイ エフ | Bearing device |
| CN102166720A (en) * | 2011-04-30 | 2011-08-31 | 山东威能数字机器有限公司 | Structural support of ball screw assembly |
| CN202825376U (en) * | 2012-06-19 | 2013-03-27 | 安徽双龙机床制造有限公司 | Z-axis bearing lubrication structure of heavy type numerically controlled lathe |
| CN203109694U (en) * | 2012-12-25 | 2013-08-07 | 泉州佳泰数控有限公司 | Screw support bearing mounting device with seal mechanism |
| CN203441969U (en) * | 2013-09-03 | 2014-02-19 | 常州机电职业技术学院 | Special bearing high-rigidity supporting and towing mechanism for ball screw |
-
2013
- 2013-09-03 CN CN201310392836.6A patent/CN103438093B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0157914B1 (en) * | 1984-02-29 | 1988-01-20 | INA Wälzlager Schaeffler KG | Roller bearing for a screw spindle |
| JP3929345B2 (en) * | 2001-04-24 | 2007-06-13 | アクチボラゲット エス ケイ エフ | Bearing device |
| CN102166720A (en) * | 2011-04-30 | 2011-08-31 | 山东威能数字机器有限公司 | Structural support of ball screw assembly |
| CN202825376U (en) * | 2012-06-19 | 2013-03-27 | 安徽双龙机床制造有限公司 | Z-axis bearing lubrication structure of heavy type numerically controlled lathe |
| CN203109694U (en) * | 2012-12-25 | 2013-08-07 | 泉州佳泰数控有限公司 | Screw support bearing mounting device with seal mechanism |
| CN203441969U (en) * | 2013-09-03 | 2014-02-19 | 常州机电职业技术学院 | Special bearing high-rigidity supporting and towing mechanism for ball screw |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194996A (en) * | 2016-07-26 | 2016-12-07 | 成都普瑞斯数控机床有限公司 | Screw mandrel bearing fixed mechanism |
| CN113606303A (en) * | 2021-07-30 | 2021-11-05 | 武汉新威奇科技有限公司 | Axial precise clearance control structure and method for heavy-load ball screw of press machine |
| CN113606303B (en) * | 2021-07-30 | 2022-10-18 | 武汉新威奇科技有限公司 | Axial precise clearance control structure and method for heavy-load ball screw of press machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103438093B (en) | 2016-04-06 |
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Effective date of registration: 20210121 Address after: 215500 Building 8, ChuangJin Industrial Park, Zhitang Town Industrial Park, Changshu City, Suzhou City, Jiangsu Province Patentee after: SUZHOU HUQIANG ELECTRIC EQUIPMENT Co.,Ltd. Address before: 213164 No. 6, Xin Xin Dong Lu, Wujin District, Jiangsu, Changzhou Patentee before: CHANGZHOU INSTITUTE OF MECHATRONIC TECHNOLOGY |
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