CN103216523A - Ball screw combination bearing - Google Patents
Ball screw combination bearing Download PDFInfo
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- CN103216523A CN103216523A CN2013101329238A CN201310132923A CN103216523A CN 103216523 A CN103216523 A CN 103216523A CN 2013101329238 A CN2013101329238 A CN 2013101329238A CN 201310132923 A CN201310132923 A CN 201310132923A CN 103216523 A CN103216523 A CN 103216523A
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- bearing
- ball screw
- inner race
- bearing inner
- channel
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Abstract
The invention discloses a ball screw combination bearing which comprises a ball screw, a plurality of bearing steel balls, an outer bearing ring and dustproof covers, wherein the ball screw comprises an inner bearing ring, the plurality of bearing steel balls are arranged in a bearing channel in the inner bearing ring by a keeping frame, the outer bearing ring is arranged on the bearing steel balls, the dustproof covers are arranged on two sides of the inner bearing ring and the outer bearing ring, and an axial positioning key groove is formed in the outer surface of the ball screw, is used for connecting another part and is taken as a standard for machining a spiral rollaway nest, a ball returning rollaway nest and the bearing channel on the inner bearing ring as well as a installing reference of each part. The ball screw combination bearing disclosed by the invention is capable of effectively guaranteeing the consistency of the precision of a start angle of the spiral rollaway nest in the ball screw, the position precision of ball returning holes in two ends of the ball returning rollaway nest, and the machining precision of the bearing channel on the inner bearing ring.
Description
Technical field
The present invention relates to the mechanical transmissioning technology field, particularly ball screw combination bearing.
Background technique
Screw mandrel screw driving mechanism belongs to the most general a kind of driving mechanism of mechanical transmission fields, use in some fields at screw mandrel screw driving mechanism, for example be applied in the automobile steering device, referring to Fig. 1, its ball screw 2 that cooperates with screw mandrel 1 need cooperate with bearing 3, therefore on ball screw 2, need to install bearing 3, its bearing 3 is to separate to make with ball screw 2, bearing 3 is that the inner ring 3a with bearing 3 is a tight fit on the ball screw 2 when installing, and the gear casing 4 of steering box is connected with the outer ring 3b of bearing 3 by gear screw 5.Though between the inner ring 3a of bearing 3 and the ball screw 2 is drive fit, still has alignment error, be difficult to be adapted in the product that some transmission accuracies have relatively high expectations.
For fear of alignment error, some screw mandrel screw driving mechanism MANUFACTURER just is molded directly within the inner ring 3a of bearing 3 on the ball screw 2, to avoid alignment error for this reason.Open that the inner ring and the integrated prior art of ball screw of bearing is many, the mounting structure of disclosed bearing of US6406188B1 and ball screw for example, it is combined as an integral body with bearing and ball screw, both reduced number of components, reduced installation procedure, also improved installation precision, but be combined as in the technological scheme of an integral body at this class bearing and ball screw, the processing of its ball screw is very difficult, how to guarantee effectively that the initial angle precision of the spiral rolling track in the ball screw and the positional accuracy in the return of serve hole at return of serve raceway two ends and the conformity of the bearing channel machining accuracy on the bearing inner race are global difficult problems.Moreover be combined as in the technological scheme of an integral body at this class bearing and ball screw, the boundary that the left and right two sections circular arcs of bearing channel on its bearing inner race add man-hour is difficult to grasp, Accident due to quality such as often cross the border in the course of working or the boundary line is unclear, yield rate is lower, and efficient is not high.
Summary of the invention
One of technical problem to be solved by this invention is to be combined as the technical problem that the conformity of the positional accuracy in return of serve hole at the initial angle precision of the spiral rolling track in the existing ball screw in the technological scheme of an integral body and the raceway two ends of returning serve and the bearing channel machining accuracy on the bearing inner race is difficult to guarantee and a kind of ball screw combination bearing of new structure is provided at existing bearing and ball screw.
It is difficult with grasp that two of technical problem to be solved by this invention is to be combined as the boundary that the left and right two sections circular arcs of bearing channel on the technological scheme middle (center) bearing inner ring of an integral body add man-hour at existing bearing and ball screw, Accident due to quality such as often cross the border in the course of working or the boundary line is unclear, problems such as yield rate is lower, and efficient is not high and a kind of ball screw combination bearing of new structure is provided.
Technical problem to be solved by this invention can be achieved through the following technical solutions:
Ball screw combination bearing comprises:
One contains the ball screw of bearing inner race, have in the ball screw one with screw mandrel transmission fit screw rod hole, the hole face of described screw hole is provided with the spiral rolling track for the ball motion, and on the outer surface of ball screw, offering at least one return of serve raceway, the two ends of described return of serve raceway connect by return of serve hole and described spiral rolling track; Be provided with the bearing channel of ring-type in the described bearing inner race;
Somely be installed in bearing steel ball in the bearing channel in the described bearing inner race by retainer;
Be installed in the bearing outer ring on the described bearing steel ball;
Be installed in the dust cover on bearing inner race and the bearing outer ring both sides, it is characterized in that,
On the outer surface of described ball screw, offer an axially locating keyway, described axially locating keyway plays the effect that connects another parts on the one hand, play the benchmark as the bearing channel on processing spiral rolling track and return of serve raceway and the bearing inner race on the other hand, one side is as the reference for installation of each part again.
In a preferred embodiment of the invention, described axially locating keyway is extended to the interior edge face place of bearing inner race by the distal-most end of ball screw distance between bearing inner ring.
In a preferred embodiment of the invention, the interior edge face of described bearing inner race is as another benchmark of the whole ball screw combination bearing of processing.
In a preferred embodiment of the invention, be provided with an annular spring groove, so that use jump ring to limit the part axial position that is installed on the ball screw at the distal-most end place of described ball screw distance between bearing inner ring.
In a preferred embodiment of the invention, bottommost at the bearing channel of described bearing inner race and bearing outer ring offers a hoop oil groove, the described hoop oil groove left and right sides is respectively arranged with the left and right annular circular arc that constitutes bearing channel, this hoop oil groove serves as the separatrix of the left and right annular circular arc that constitutes bearing channel on the one hand, plays the lubricated effect of oil storage on the other hand.
In a preferred embodiment of the invention, adopt the circular arc chamfering transition to be connected between the left and right rib of the left and right annular circular arc in the bearing channel of described bearing inner race and bearing inner race.
In a preferred embodiment of the invention, the hoop oil groove in the bearing channel of described bearing inner race, left and right annular circular arc, circular arc chamfering and left and right rib adopt integrated grinding method to process.
Owing to adopted technological scheme as above, the present invention compares with the technological scheme that the ball screw is combined as an integral body with existing bearing, has following unforeseeable technique effect:
1, on the outer surface of ball screw, offers an axially locating keyway, as the benchmark of the bearing channel on processing spiral rolling track and return of serve raceway and the bearing inner race, effectively guaranteed the initial angle precision and the positional accuracy in the return of serve hole at return of serve raceway two ends and the conformity of the bearing channel machining accuracy on the bearing inner race of the spiral rolling track in the ball screw.
2, offer an axially locating keyway on the outer surface of ball screw, as the reference for installation of each part, other location and installation mode is more reliable, firm relatively.
3, be provided with an annular spring groove at the distal-most end place of ball screw distance between bearing inner ring and use jump ring to replace original screw thread to fix, assembling is simple more and convenient.
4, the bottommost at the bearing channel of bearing inner race offers a hoop oil groove, this hoop oil groove serves as the separatrix of the left and right annular circular arc that constitutes bearing channel on the one hand, play the lubricated effect of oil storage on the other hand, solved in the prior art technical problem that bearing channel left and right sides circular arc processing wiring is not known and crossed the border easily.
5, adopt the circular arc chamfering transition to be connected between the left and right rib of left and right annular circular arc and bearing inner race, and the hoop oil groove in the bearing channel of bearing inner race, left and right annular circular arc, circular arc chamfering and left and right rib interior edge face adopt integrated grinding method to process, make and be slick and sly fully transition between the left and right annular circular arc of bearing channel and the left and right rib, to prevent bearing steel ball when being subjected to axial load, scratched by the sharp corner between left and right annular circular arc and the left and right rib.
Description of drawings
Fig. 1 is the structural representation of the ball screw driving mechanism in the existing automobile steering device.
Fig. 2 is the exploded perspective view of ball screw combination bearing of the present invention.
Fig. 3 is the assembling schematic representation of ball screw combination bearing of the present invention.
Fig. 4 is the structural representation of ball screw in the ball screw combination bearing of the present invention.
The schematic representation that Fig. 5 sees from a direction for the axially locating keyway of ball screw in the ball screw combination bearing of the present invention.
The schematic representation that Fig. 6 sees from another direction for the axially locating keyway of ball screw in the ball screw combination bearing of the present invention.
Fig. 7 is the structural representation of the annular spring groove of ball screw in the ball screw combination bearing of the present invention.
Fig. 8 is the structural representation of the annular oil groove of ball screw in the ball screw combination bearing of the present invention.
Fig. 9 is the structural representation of the circular arc chamfering of ball screw in the ball screw combination bearing of the present invention.
Embodiment
Further describe the present invention below in conjunction with the drawings and specific embodiments.
Referring to Fig. 2 and Fig. 3, the ball screw combination bearing that provides among the figure, comprise that one contains the ball screw 100 of bearing inner race 210, have in the ball screw 100 one with screw mandrel transmission fit screw rod hole 110, the hole face of screw hole 110 is provided with the spiral rolling track 120 for the ball motion, and on the outer surface 130 of ball screw 100, offering a return of serve raceway 140, the two ends of return of serve raceway 140 connect by return of serve hole 141,142 and spiral rolling track 120.
Bearing 200 comprises bearing inner race 210, bearing outer ring 240 and some bearing steel balls 220.Referring to Fig. 4, bearing inner race 210 and the 100 integrated manufacturings of ball screw are positioned at an end of ball screw 100, are provided with the bearing channel 211 of ring-type in the bearing inner race 210.
Some bearing steel balls 220 are installed in the bearing channel 211 in the bearing inner race 210 by retainer 230, and bearing outer ring 240 is on some bearing steel balls 220, and both sides respectively are equipped with a dust cover 250,250a between bearing inner race 210 and bearing outer ring 240.
Referring to Fig. 5 and Fig. 6, characteristics of the present invention are to offer an axially locating keyway 150 on the outer surface 130 of ball screw 100, and this axially locating keyway 150 is extended to the interior edge face 210a place of bearing inner race 210 by the distal-most end of ball screw 100 distance between bearing inner rings 210.This axially locating keyway 150 plays the effect that connects another parts on the one hand, play on the other hand as processing spiral rolling track 120 initial angle precision and return of serve hole 141,142 positional accuracys at return of serve raceway 140 two ends and the benchmark of the bearing channel 211 on the bearing inner race 210, effectively guaranteed the initial angle precision and the positional accuracy in the return of serve hole 141,142 at return of serve raceway 140 two ends and the conformity of bearing channel 211 machining accuracies on the bearing inner race 210 of the spiral rolling track 120 in the ball screw 100.On the one hand as the reference for installation of each part, other location and installation mode is more reliable, firm relatively again.
The another one characteristics are, with the interior edge face 210a of bearing inner race 210 another benchmark as the whole ball screw combination bearing of processing.
Referring to Fig. 7, the 3rd characteristics of the present invention are to be provided with an annular spring groove 160 at the distal-most end place of ball screw 100 distance between bearing inner rings 210, so that use jump ring to limit the part axial position that is installed on the ball screw 100.
Referring to Fig. 8, the 4th characteristics of the present invention are that the bottommost at the bearing channel 211,241 of bearing inner race 210 and bearing outer ring 240 offers a hoop oil groove 211a, 241a, the hoop oil groove 211a left and right sides is respectively arranged with left and right annular circular arc 211b, 211c, 241b, the 241c that constitutes bearing channel 211 and 241, this hoop oil groove 211a serves as the left and right annular circular arc 211b that constitutes bearing channel 211, the separatrix of 211c on the one hand like this, plays the lubricated effect of oil storage on the other hand.
Referring to Fig. 9, the 5th characteristics of the present invention be left and right annular circular arc 211b, 211c with the left and right rib 212,213 of bearing inner race 210 between adopt circular arc chamfering 214,215 transition to be connected.Hoop oil groove 211a in the bearing channel 211 of bearing inner race 210, left and right annular circular arc 211b, 211c, circular arc chamfering 214,215 and left and right rib 212,213 adopt integrated grinding method to process, make like this and be slick and sly fully transition between left and right annular circular arc 211b, the 211c of bearing channel 211 and the left and right rib 212,213, to prevent bearing steel ball 220 when being subjected to axial load, scratched by the sharp corner between left and right annular circular arc 211b, 211c and the left and right rib 212,213.
Claims (7)
1. ball screw combination bearing comprises:
One contains the ball screw of bearing inner race, have in the ball screw one with screw mandrel transmission fit screw rod hole, the hole face of described screw hole is provided with the spiral rolling track for the ball motion, and on the outer surface of ball screw, offering at least one return of serve raceway, the two ends of described return of serve raceway connect by return of serve hole and described spiral rolling track; Be provided with the bearing channel of ring-type in the described bearing inner race;
Somely be installed in bearing steel ball in the bearing channel in the described bearing inner race by retainer;
Be installed in the bearing outer ring on the described bearing steel ball;
Be installed in the dust cover on bearing inner race and the bearing outer ring both sides, it is characterized in that,
On the outer surface of described ball screw, offer an axially locating keyway, described axially locating keyway plays the effect that connects another parts on the one hand, play the benchmark as the bearing channel on processing spiral rolling track and return of serve raceway and the bearing inner race on the other hand, one side is as the reference for installation of each part again.
2. ball screw combination bearing as claimed in claim 1 is characterized in that, described axially locating keyway is extended to the interior edge face place of bearing inner race by the distal-most end of ball screw distance between bearing inner ring.
3. ball screw combination bearing as claimed in claim 1 is characterized in that, in a preferred embodiment of the invention, the interior edge face of described bearing inner race is as another benchmark of the whole ball screw combination bearing of processing.
4. ball screw combination bearing as claimed in claim 1 is characterized in that, is provided with an annular spring groove at the distal-most end place of described ball screw distance between bearing inner ring, so that use jump ring to limit the part axial position that is installed on the ball screw.
5. ball screw combination bearing as claimed in claim 1, it is characterized in that, bottommost at the bearing channel of described bearing inner race and bearing outer ring offers a hoop oil groove, the described hoop oil groove left and right sides is respectively arranged with the left and right annular circular arc that constitutes bearing channel, this hoop oil groove serves as the separatrix of the left and right annular circular arc that constitutes bearing channel on the one hand, plays the lubricated effect of oil storage on the other hand.
6. ball screw combination bearing as claimed in claim 5 is characterized in that, adopts the circular arc chamfering transition to be connected between the left and right annular circular arc in the bearing channel of described bearing inner race and the left and right rib of bearing inner race.
7. ball screw combination bearing as claimed in claim 1 is characterized in that, the hoop oil groove in the bearing channel of described bearing inner race, left and right annular circular arc, circular arc chamfering and left and right rib adopt integrated grinding method to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310132923.8A CN103216523B (en) | 2013-04-16 | 2013-04-16 | Ball screw combination bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310132923.8A CN103216523B (en) | 2013-04-16 | 2013-04-16 | Ball screw combination bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103216523A true CN103216523A (en) | 2013-07-24 |
| CN103216523B CN103216523B (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310132923.8A Active CN103216523B (en) | 2013-04-16 | 2013-04-16 | Ball screw combination bearing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832534A (en) * | 2015-05-14 | 2015-08-12 | 江苏联动轴承有限公司 | Integrated nut assembly bearing for automobile |
| CN106812792A (en) * | 2016-12-29 | 2017-06-09 | 慈兴集团有限公司 | A kind of modified form motor turning combination bearing |
| CN107806498A (en) * | 2017-11-08 | 2018-03-16 | 山东交通学院 | A kind of electromagnetic damper feed screw apparatus |
| CN109611453A (en) * | 2018-11-27 | 2019-04-12 | 慈兴集团有限公司 | A kind of integrated bearing assembly of Miniature ball lead screw |
Citations (7)
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|---|---|---|---|---|
| CH597531A5 (en) * | 1976-05-11 | 1978-04-14 | Claude Betrix | Ball bearing for combined linear and rotary motion |
| JPH0674315A (en) * | 1992-08-26 | 1994-03-15 | Ntn Corp | Ball screw device |
| JPH0654919U (en) * | 1992-12-28 | 1994-07-26 | 日本ベアリング株式会社 | Rotary ball spline |
| CN2419412Y (en) * | 2000-04-19 | 2001-02-14 | 上银科技股份有限公司 | Bearing style screw rod |
| CN201074666Y (en) * | 2007-09-11 | 2008-06-18 | 大连高金数控集团有限公司 | Structure of ball screw rod and nut |
| JP2009133413A (en) * | 2007-11-30 | 2009-06-18 | Thk Co Ltd | Motion device |
| CN203189525U (en) * | 2013-04-16 | 2013-09-11 | 慈兴集团有限公司 | Ball nut combined bearing |
-
2013
- 2013-04-16 CN CN201310132923.8A patent/CN103216523B/en active Active
Patent Citations (7)
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|---|---|---|---|---|
| CH597531A5 (en) * | 1976-05-11 | 1978-04-14 | Claude Betrix | Ball bearing for combined linear and rotary motion |
| JPH0674315A (en) * | 1992-08-26 | 1994-03-15 | Ntn Corp | Ball screw device |
| JPH0654919U (en) * | 1992-12-28 | 1994-07-26 | 日本ベアリング株式会社 | Rotary ball spline |
| CN2419412Y (en) * | 2000-04-19 | 2001-02-14 | 上银科技股份有限公司 | Bearing style screw rod |
| CN201074666Y (en) * | 2007-09-11 | 2008-06-18 | 大连高金数控集团有限公司 | Structure of ball screw rod and nut |
| JP2009133413A (en) * | 2007-11-30 | 2009-06-18 | Thk Co Ltd | Motion device |
| CN203189525U (en) * | 2013-04-16 | 2013-09-11 | 慈兴集团有限公司 | Ball nut combined bearing |
Non-Patent Citations (2)
| Title |
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| 夏伯雄: "《数控技术》", 31 January 2010 * |
| 王金娥等: "《机电一体化课程设计指导书》", 31 January 2012 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832534A (en) * | 2015-05-14 | 2015-08-12 | 江苏联动轴承有限公司 | Integrated nut assembly bearing for automobile |
| CN106812792A (en) * | 2016-12-29 | 2017-06-09 | 慈兴集团有限公司 | A kind of modified form motor turning combination bearing |
| CN107806498A (en) * | 2017-11-08 | 2018-03-16 | 山东交通学院 | A kind of electromagnetic damper feed screw apparatus |
| CN109611453A (en) * | 2018-11-27 | 2019-04-12 | 慈兴集团有限公司 | A kind of integrated bearing assembly of Miniature ball lead screw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103216523B (en) | 2016-06-22 |
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