CN203442065U - High-rigidity fixed bearing traction mechanism for ball screw - Google Patents
High-rigidity fixed bearing traction mechanism for ball screw Download PDFInfo
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- CN203442065U CN203442065U CN201320542534.8U CN201320542534U CN203442065U CN 203442065 U CN203442065 U CN 203442065U CN 201320542534 U CN201320542534 U CN 201320542534U CN 203442065 U CN203442065 U CN 203442065U
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- bearing
- ball screw
- tractive
- thrust
- shaft end
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Abstract
本实用新型公开了一种滚珠丝杠用高刚度固定支承牵拉机构，安装在滚珠丝杠的轴端部，它包括向心轴承、轴承套、轴承座、支撑套和两个推力轴承以及用来牵拉滚珠丝杠使其轴向受拉应力的牵拉装置，轴承套安装在轴承座内，并且轴承套开有轴承孔，向心轴承紧配在轴承孔内，并且该向心轴承还固定套装在轴端部上，推力轴承均具有固定圈和转动圈，两个推力轴承位于向心轴承的两侧，并且其固定圈分别与轴承套两侧相应的轴承孔端面紧密贴合，每个推力轴承的转动圈分别对应一个支撑套，并且转动圈固定连接在相应的支撑套上，支撑套还固设在轴端部上。本实用新型不仅能够提高支承刚度，而且能够随时补偿热变形，提高机床精度稳定性。
The utility model discloses a high-rigidity fixed support pulling mechanism for a ball screw, which is installed on the shaft end of the ball screw. The pulling device is used to pull the ball screw to make it receive axial tensile stress. The bearing sleeve is installed in the bearing seat, and the bearing sleeve has a bearing hole. The radial bearing is tightly fitted in the bearing hole, and the radial bearing is also The fixed sleeve is installed on the end of the shaft, and the thrust bearing has a fixed ring and a rotating ring. The rotating rings of the thrust bearings respectively correspond to a supporting sleeve, and the rotating rings are fixedly connected to the corresponding supporting sleeves, and the supporting sleeves are also fixedly arranged on the shaft ends. The utility model can not only improve the supporting rigidity, but also can compensate thermal deformation at any time, and improve the precision stability of the machine tool.
Description
Technical field
The utility model relates to high rigidity fixed bearing draw-off mechanism for a kind of ball screw, belongs to advanced equipment manufacturing technical field, is mainly used in high-precision numerical control machine, is also applicable on the pivoting support of the rod members such as similar ball screw.
Background technique
At present, ball screw is commonly used 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 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, 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 in the utility model 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, the technical solution of the utility model 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 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 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 is also installed on shaft end.
Further, on the shaft end of described ball screw, be set with fixed cover, and on shaft end, be also threaded connection locking nut, fixed cover is also arranged in bearing support, described shaft end has axle rank, one side of fixed cover is connected on 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 tractive screw, between described tractive cover and bearing support, leaves pressure adjusting play, and described gap spacer is positioned at pressure adjusting play.
Further, the contact position of described fixed cover and bearing support is provided with rotary seal ring.
Further, on described bearing support and bearing housing, all have gap lubricating bearings oil duct.
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, 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 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 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 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 extraneous dustproof with rotary seal ring, effectively life-saving.
Accompanying drawing explanation
Fig. 1 is the structural representation of high rigidity fixed bearing draw-off mechanism for ball screw 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, 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 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 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 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 is also installed on shaft end 10 and is rotated 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 utility model, 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, on the shaft end 10 of ball screw, be set with fixed cover 11, and on shaft end 10, be also threaded connection locking nut 6, fixed cover 11 is also 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.The locking nut 6 successively supporting sleeve 1 on push-tight right side, the thrust-bearing 2 in the thrust-bearing 2 on right side, bearing housing 8, left side,, the supporting sleeve 1 in left side, fixed cover 11 make its dieback on the 10-1 of the axle rank of ball screw, is given 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 tractive screw, between tractive cover 5 and bearing support 9, leaves pressure adjusting play, and gap spacer 7 is positioned at pressure adjusting play.The utility model is reserved bearing housing 8 and 5 gaps of tractive cover on request, manufacture the gap spacer 7 of same thickness and fill in pressure adjusting play, tighten tractive screw on tractive cover 5 and pull bearing housing 8 until eliminate overlap the gap of 5 with tractive completely, to ball screw, apply tensile stress, the thermal distortion of compensation leading screw, maintain 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 changing the thickness of gap spacer 7, gap of the present utility model 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, on 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 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 (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 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) 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) is also 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: on the shaft end of described ball screw (10), be set with fixed cover (11), and on shaft end (10), be 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), 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 tractive screw, between described tractive cover (5) and bearing support (9), leave pressure adjusting play, described gap spacer (7) is positioned at 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 |
|---|---|---|---|
| CN201320542534.8U CN203442065U (en) | 2013-09-03 | 2013-09-03 | High-rigidity fixed bearing traction mechanism for ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320542534.8U CN203442065U (en) | 2013-09-03 | 2013-09-03 | High-rigidity fixed bearing traction mechanism for ball screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203442065U true CN203442065U (en) | 2014-02-19 |
Family
ID=50093122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320542534.8U Expired - Lifetime CN203442065U (en) | 2013-09-03 | 2013-09-03 | High-rigidity fixed bearing traction mechanism for ball screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203442065U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423401A (en) * | 2013-09-03 | 2013-12-04 | 常州机电职业技术学院 | High-rigidity fixed bearing traction mechanism for ball screw |
| CN109468731A (en) * | 2018-12-30 | 2019-03-15 | 泰州市姜堰区鑫汇来纺织机械有限公司 | A kind of weft winding pipe of fire hose circular weaving machine |
| CN114060488A (en) * | 2021-12-20 | 2022-02-18 | 浙江亚微精密机床有限公司 | Lead screw mounting structure capable of adapting to thermal deformation of lead screw |
-
2013
- 2013-09-03 CN CN201320542534.8U patent/CN203442065U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423401A (en) * | 2013-09-03 | 2013-12-04 | 常州机电职业技术学院 | High-rigidity fixed bearing traction mechanism for ball screw |
| CN103423401B (en) * | 2013-09-03 | 2015-11-04 | 常州机电职业技术学院 | High-rigidity fixed bearing traction mechanism for ball screw |
| CN109468731A (en) * | 2018-12-30 | 2019-03-15 | 泰州市姜堰区鑫汇来纺织机械有限公司 | A kind of weft winding pipe of fire hose circular weaving machine |
| CN114060488A (en) * | 2021-12-20 | 2022-02-18 | 浙江亚微精密机床有限公司 | Lead screw mounting structure capable of adapting to thermal deformation of lead screw |
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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: 20151104 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |