CN103438093B - Ball screw special bearing height rigidity bearing draw-off mechanism - Google Patents
Ball screw special bearing height rigidity bearing draw-off mechanism Download PDFInfo
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- CN103438093B CN103438093B CN201310392836.6A CN201310392836A CN103438093B CN 103438093 B CN103438093 B CN 103438093B CN 201310392836 A CN201310392836 A CN 201310392836A CN 103438093 B CN103438093 B CN 103438093B
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- rolling element
- ball screw
- turning collar
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Abstract
The invention discloses a kind of ball screw special bearing height rigidity bearing draw-off mechanism, be arranged on the shaft end of ball screw, wherein, inner ring is fixedly set in the shaft end of ball screw, 3rd rolling element is arranged between inner ring and public circle, public circle, 3rd rolling element and inner ring form a radial bearing, first turning collar and the second turning collar are fixedly set in the shaft end of ball screw, first rolling element is arranged between the first turning collar and public circle, first turning collar, first rolling element and public circle form a thrust-bearing, second rolling element is arranged between the second turning collar and public circle, second turning collar, second rolling element and public circle form another thrust-bearing, tractive cover is connected with public circle by stretching screw, pressure adjusting play is left between tractive cover and bearing support, spacer is positioned at pressure adjusting play.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 a kind of ball screw special bearing height rigidity bearing draw-off mechanism, belong to 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, general bearing fixed bearing commonly used by ball screw, supporting width is little, rigidity is low, vibration resistance is poor, leading screw extends uncompensated, poor heat stability, direct affect lathe positioning precision, repetitive positioning accuracy and positional accuracy varies with temperature, with the stability etc. of load variations, high-precision numerical control machine, needs the servo actuator of high rigidity, highi degree of accuracy, good thermal stability, and 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 overcoming prior art, and provide a kind of ball screw special bearing height rigidity 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: a kind of ball screw special bearing height rigidity bearing draw-off mechanism, be arranged on the shaft end of ball screw, it comprises the first turning collar, second turning collar, first rolling element, second rolling element, public circle, bearing support, spacer, tractive cover, 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, 3rd rolling element is arranged between inner ring and public circle, and public circle, 3rd rolling element and inner ring form a radial bearing, first turning collar and the second turning collar are fixedly set in the shaft end of ball screw, first rolling element is arranged between the first turning collar and public circle, and the first turning collar, first rolling element and public circle form a thrust-bearing, second rolling element is arranged between the second turning collar and public circle, and the second turning collar, second rolling element and public circle form another thrust-bearing, described tractive cover is connected with public circle by stretching screw, pressure adjusting play is left between tractive cover and bearing support, described spacer is positioned at pressure adjusting play.
Further, the shaft end of described ball screw has been threaded connection locking nut, the shaft end of described ball screw is also provided with the shaft shoulder, and the side of the first turning collar is connected on the shaft shoulder, and side and second turning collar of locking nut abut against.
Further, the first described turning collar and the contact position of bearing support are provided with rotary seal ring.
Further, described bearing support has the gap oil leab to radial bearing and two thrust-bearing lubrications.
Further, the first described rolling element and the second rolling element are band retainer cylindrical roller or band retainer ball.
Further, the 3rd described rolling element is needle roller or roller or ball.
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, 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, pretension ball screw, can compensate thermal distortion at any time, and maintenance leading screw length is constant, helical pitch is constant, improves machine tool accuracy stability.Tractive cover pulls public circle until eliminate the gap with tractive inner room completely by tightening stretching screw, 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 has the gap oil leab to radial bearing and two thrust-bearings lubrication, 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.
5, the outer ring of radial bearing and the retainer ring of two thrust-bearings public, decrease number of spare parts, be easy to Seriation Design and batch production.
Accompanying drawing explanation
Fig. 1 is the structural representation of ball screw special bearing height rigidity bearing draw-off mechanism of the present invention.
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, a kind of ball screw special bearing height rigidity bearing draw-off mechanism, be arranged on the shaft end 8 of ball screw, it comprises the first turning collar 1-1, second turning collar 1-2, first rolling element 2-1, second rolling element 2-2, public circle 3, bearing support 4, spacer 5, tractive cover 6, 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, 3rd rolling element 9 is arranged between inner ring 10 and public circle 3, and public circle 3, 3rd rolling element 9 and inner ring 10 form a radial bearing, first turning collar 1-1 and the second turning collar 1-2 is fixedly set in the shaft end 8 of ball screw, 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, first rolling element 2-1 and public circle 3 form a thrust-bearing, 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, 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, pressure adjusting play is left between tractive cover 6 and bearing support 4, described spacer 5 is positioned at pressure adjusting play, spacer 5 can be made up of two and half spacers, by the thickness of computational manufacturing two and half spacer, behind the gap calculated between reserved public circle 3 and tractive cover 6, half spacer is filled in respectively from both sides, stretching screw on fastening tractive cover 6, eliminate the gap between public circle 3 and tractive cover 6 completely, apply pretightening force to ball screw.The present invention's thrust-bearing+radial bearing+thrust-bearing combination fixed bearing ball screw, radial bearing radial support ball screw, the mechanical properties such as thrust-bearing bears bidirectional axial force, 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, the shaft end 8 of ball screw has been threaded connection locking nut 7, the shaft end of ball screw is also provided with shaft shoulder 8-1, the side of the first turning collar 1-1 is connected on shaft shoulder 8-1, side and the second turning collar 1-2 of locking nut 7 abut against, locking nut 7 is push-tight second turning collar 1-2, the second rolling element 2-2, public circle 3, 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.
In order to carry out dust-proof process, 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 the lubricity of radial bearing and thrust-bearing can be improved, improve its life-span, bearing support 4 has the gap oil leab to radial bearing and two thrust-bearing lubrications.
First rolling element 2-1 and the second rolling element 2-2 is band retainer cylindrical roller or band retainer ball, but is not limited thereto.
3rd rolling element is needle roller or roller or ball, but is not limited thereto.
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 (6)
1. a ball screw special bearing height rigidity bearing draw-off mechanism, be arranged on the shaft end (8) of ball screw, it is characterized in that: it comprises the first turning collar (1-1), second turning collar (1-2), first rolling element (2-1), second rolling element (2-2), public circle (3), bearing support (4), spacer (5), tractive cover (6), 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, 3rd rolling element (9) is arranged between inner ring (10) and public circle (3), and public circle (3), 3rd rolling element (9) and inner ring (10) form a radial bearing, first turning collar (1-1) and the second turning collar (1-2) are fixedly set in the shaft end (8) of ball screw, 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), first rolling element (2-1) and public circle (3) form a thrust-bearing, 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), 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, pressure adjusting play is left between tractive cover (6) and bearing support (4), described spacer (5) is positioned at pressure adjusting play.
2. ball screw special bearing height rigidity bearing draw-off mechanism according to claim 1, it is characterized in that: the shaft end (8) of described ball screw has been threaded connection locking nut (7), the shaft end of described ball screw is also provided with the shaft shoulder (8-1), the side of the first turning collar (1-1) is connected on the shaft shoulder (8-1), and side and second turning collar (1-2) of locking nut (7) abut against.
3. ball screw special bearing height rigidity bearing draw-off mechanism 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. ball screw special bearing height rigidity bearing draw-off mechanism according to claim 1 and 2, is characterized in that: described bearing support (4) has the gap oil leab to radial bearing and two thrust-bearing lubrications.
5. ball screw special bearing height rigidity bearing draw-off mechanism 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. ball screw special bearing height rigidity bearing draw-off mechanism according to claim 1 and 2, is characterized in that: the 3rd described 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 |
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| Publication Number | Publication Date |
|---|---|
| CN103438093A CN103438093A (en) | 2013-12-11 |
| CN103438093B true CN103438093B (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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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Families Citing this family (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 |
| 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 |
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 |
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| CN103438093A (en) | 2013-12-11 |
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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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