CN203441969U - High-rigidity bearing traction mechanism special for ball screw - Google Patents
High-rigidity bearing traction mechanism special for ball screw Download PDFInfo
- Publication number
- CN203441969U CN203441969U CN201320542256.6U CN201320542256U CN203441969U CN 203441969 U CN203441969 U CN 203441969U CN 201320542256 U CN201320542256 U CN 201320542256U CN 203441969 U CN203441969 U CN 203441969U
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- bearing
- ball screw
- rolling element
- turning collar
- public circle
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- 230000007246 mechanism Effects 0.000 title claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 44
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000008859 change 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
- 238000010923 batch production Methods 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
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
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Abstract
The utility model discloses a high-rigidity bearing traction mechanism special for a ball screw, which is arranged at the shaft end part of the ball screw, the inner ring is fixedly sleeved at the shaft end part of the ball screw, the third rolling body is arranged between the inner ring and the common ring, the third rolling body and the inner ring form a radial bearing, the first rotating ring and the second rotating ring are fixedly sleeved at the shaft end part of the ball screw, the first rolling body is arranged between the first rotating ring and the common ring, the first rotating ring, the first rolling body and the common ring form a thrust bearing, the second rolling body is arranged between the second rotating ring and the common ring, the second rotating ring, the second rolling body and the common ring form another thrust bearing, the traction sleeve is connected with the common ring through a tensioning screw, a tension and pressure adjusting gap is reserved between the traction sleeve and a bearing seat, and the adjusting pad is positioned in the tension and pressure adjusting gap. The utility model discloses not only can improve supporting rigidity, can compensate heat altered shape moreover at any time, improve lathe precision stability.
Description
Technical field
The utility model relates to the high rigidity bearing draw-off mechanism of a kind of ball screw special bearing, 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, ball screw is commonly used general bearing fixed bearing, supporting width is little, rigidity is low, vibration resistance is poor, leading screw extends uncompensated, poor heat stability, 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 in the utility model 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, the technical solution of the utility model 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, 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, between tractive cover and bearing support, leave pressure adjusting play, described spacer is positioned at pressure adjusting play.
Further, on the shaft end of described ball screw, be threaded connection locking nut, the shaft end of described ball screw is also 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 first described turning collar and the contact position of bearing support are provided with rotary seal ring.
Further, on described bearing support, have radial bearing and two gap oil leabs that thrust-bearing is lubricated.
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.
Adopt technique scheme, the utlity model has following beneficial effect:
1, thrust-bearing+radial bearing for the utility model+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, maintains that leading screw length is constant, helical pitch is constant, improves machine tool accuracy stability.Tractive cover by tightening stretching screw and pulling public circle until eliminate the gap with tractive inner room completely, to ball screw, apply tensile stress, the thermal distortion of compensation leading screw, the thickness that can also change as required 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, on bearing support, have 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.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high rigidity bearing draw-off mechanism of ball screw special bearing of the present utility model.
Embodiment
For content of the present utility model is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail below.
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, between tractive cover 6 and bearing support 4, leave pressure adjusting play, described spacer 5 is positioned at 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, from both sides, fill in respectively half spacer, stretching screw on fastening tractive cover 6, eliminate the gap between public circle 3 and tractive cover 6 completely, to ball screw, apply pretightening force.Thrust-bearing+radial bearing for the utility model+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.
As shown in Figure 1, on the shaft end 8 of ball screw, be threaded connection locking nut 7, the shaft end of ball screw is also provided with shaft shoulder 8-1, a 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 utility model is solved further describe; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
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, between tractive cover (6) and bearing support (4), leave pressure adjusting play, described spacer (5) is positioned at 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: on the shaft end of described ball screw (8), be threaded connection locking nut (7), the shaft end of described ball screw is also 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, 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 |
|---|---|---|---|
| CN201320542256.6U CN203441969U (en) | 2013-09-03 | 2013-09-03 | High-rigidity bearing traction mechanism special for ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320542256.6U CN203441969U (en) | 2013-09-03 | 2013-09-03 | High-rigidity bearing traction mechanism special for ball screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203441969U true CN203441969U (en) | 2014-02-19 |
Family
ID=50093027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320542256.6U Expired - Lifetime CN203441969U (en) | 2013-09-03 | 2013-09-03 | High-rigidity bearing traction mechanism special for ball screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203441969U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438093A (en) * | 2013-09-03 | 2013-12-11 | 常州机电职业技术学院 | High-rigidity bearing traction mechanism special for ball screw |
| CN106895082A (en) * | 2015-12-21 | 2017-06-27 | 珠海格力电器股份有限公司 | Robot, rotary joint connecting structure and rotary supporting mechanism thereof |
-
2013
- 2013-09-03 CN CN201320542256.6U patent/CN203441969U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438093A (en) * | 2013-09-03 | 2013-12-11 | 常州机电职业技术学院 | High-rigidity bearing traction mechanism special for ball screw |
| CN103438093B (en) * | 2013-09-03 | 2016-04-06 | 常州机电职业技术学院 | High-rigidity bearing traction mechanism special for ball screw |
| CN106895082A (en) * | 2015-12-21 | 2017-06-27 | 珠海格力电器股份有限公司 | Robot, rotary joint connecting structure and rotary supporting mechanism thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140219 Effective date of abandoning: 20160406 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |