CN103216523B - Ball screw combination bearing - Google Patents
Ball screw combination bearing Download PDFInfo
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- CN103216523B CN103216523B CN201310132923.8A CN201310132923A CN103216523B CN 103216523 B CN103216523 B CN 103216523B CN 201310132923 A CN201310132923 A CN 201310132923A CN 103216523 B CN103216523 B CN 103216523B
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- bearing
- ball screw
- inner race
- bearing inner
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Abstract
Ball screw combination bearing disclosed by the invention, including: a ball screw containing bearing inner race；Some bearing steel balls being arranged on by retainer in the bearing channel in bearing inner race；It is arranged on the bearing outer ring on bearing steel ball and is arranged on the dust cap on bearing inner race and bearing outer ring both sides, it offers an axial positioning spline on the outer surface of ball screw, axial positioning spline plays the effect connecting another parts on the one hand, playing the benchmark as the bearing channel on processing spiral rolling track and return of serve raceway and bearing inner race on the other hand, another further aspect is as the reference for installation of each part。The concordance of the bearing channel machining accuracy in the positional precision in the return of serve hole at the initial angle precision of the spiral rolling track that the present invention has been effectively ensured in ball screw and return of serve raceway two ends and bearing inner race。
Description
Technical field
The present invention relates to technical field of mechanical transmission, particularly to ball screw combination bearing。
Background technology
Screw mandrel screw drive mechanism belongs to the most common a kind of drive mechanism of mechanical transmission fields, apply in some fields at screw mandrel screw drive mechanism, such as it is applied in automobile steering device, referring to Fig. 1, ball screw 2 needs that it coordinates with screw mandrel 1 coordinate with bearing 3, therefore need bearing 3 is installed in ball screw 2, its bearing 3 is separately manufactured with ball screw 2, bearing 3 is be a tight fit in ball screw 2 by the inner ring 3a of bearing 3 when installing, and turns to the gear casing 4 of machine to be connected with the outer ring 3b of bearing 3 by gear screw 5。Although being tight fit between the inner ring 3a of bearing 3 and ball screw 2, but the alignment error of still suffering from, it is difficult in the product higher to be adapted to some transmission accuracy requirements。
For this in order to avoid alignment error, the inner ring 3a of bearing 3 is just molded directly within ball screw 2 by some screw mandrels screw drive mechanism manufacturer, to avoid alignment error。Disclose and the inner ring of bearing is compared many with the integrated prior art of ball screw, the mounting structure of such as, disclosed in US6406188B1 bearing and ball screw, it is by as a whole with ball screw combination for bearing, both number of components had been decreased, decrease installation procedure, also improve installation accuracy, but in the technical scheme that kind of bearings is as a whole with ball screw combination, the processing of its ball screw is extremely difficult, the concordance of the bearing channel machining accuracy in the positional precision in the return of serve hole at the initial angle precision of the spiral rolling track how being effectively ensured in ball screw and return of serve raceway two ends and bearing inner race is a global difficult problem。Furthermore in the technical scheme that kind of bearings is as a whole with ball screw combination, boundary during the left and right two sections of arc machinings of bearing channel on its bearing inner race is relatively difficult to grasp, the quality accident such as often crossing the border in the course of processing or boundary line is unclear, yield rate is relatively low, inefficient。
Summary of the invention
Technical problem that the concordance of the bearing channel machining accuracy that one of the technical problem to be solved is in that on the positional precision in the hole of returning serve at the initial angle precision for the spiral rolling track in ball screw existing in the technical scheme that the combination of existing bearing and ball screw is as a whole and return of serve raceway two ends and bearing inner race is difficult to ensure that and ball screw combination bearing that a kind of new construction is provided。
Boundary when the two of the technical problem to be solved are in that two section arc machining left and right for the bearing channel on the technical scheme middle (center) bearing inner ring that existing bearing is as a whole with ball screw combination is relatively difficult to grasp, the quality accident such as the course of processing is often crossed the border or boundary line is unclear, the problems such as yield rate is relatively low, inefficient and the ball screw combination bearing of a kind of new construction is provided。
The technical problem to be solved can be achieved through the following technical solutions:
Ball screw combination bearing, including:
One ball screw containing bearing inner race, ball screw has a screw hole coordinated with screw rod transmission, the face, hole of described screw hole is provided for the spiral rolling track of ball moving, 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 are through with described spiral rolling track by hole of returning serve；Described bearing inner race is provided with the bearing channel of ring-type；
Some bearing steel balls being arranged on by retainer in the bearing channel in described bearing inner race；
It is arranged on the bearing outer ring on described bearing steel ball；
It is arranged on the dust cap on bearing inner race and bearing outer ring both sides, it is characterised in that
The outer surface of described ball screw offers an axial positioning spline, described axial positioning spline plays the effect connecting another parts on the one hand, playing the benchmark as the bearing channel on processing spiral rolling track and return of serve raceway and bearing inner race on the other hand, another further aspect is as the reference for installation of each part。
In a preferred embodiment of the invention, described axial positioning spline is extended to the inner face of bearing inner race by the distalmost end of ball screw distance between bearing inner ring。
In a preferred embodiment of the invention, the inner face of described bearing inner race is as another benchmark processing whole ball screw combination bearing。
In a preferred embodiment of the invention, the distalmost end place of described ball screw distance between bearing inner ring is provided with an annular spring groove, in order to use jump ring to limit the part axial position being arranged in ball screw。
In a preferred embodiment of the invention, bottommost at described bearing inner race and the bearing channel of 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 constituting bearing channel, this hoop oil groove serves as the demarcation line of the left and right annular circular arc constituting bearing channel on the one hand, plays the effect of oil storage lubrication on the other hand。
In a preferred embodiment of the invention, circular arc chamfering transition is adopted to be connected between left and right annular circular arc and the left and right rib of bearing inner race in the bearing channel of described 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 integration grinding method to be processed。
Owing to have employed technical scheme as above, the present invention, compared with the technical scheme that existing bearing is as a whole with ball screw combination, has following unforeseeable technique effect:
1, on the outer surface of ball screw, offer an axial positioning spline, as the benchmark of the bearing channel on processing spiral rolling track and return of serve raceway and bearing inner race, the concordance of the bearing channel machining accuracy in the positional precision in the return of serve hole at the initial angle precision of the spiral rolling track being effectively ensured in ball screw and return of serve raceway two ends and bearing inner race。
2, offering an axial positioning spline 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, it is provided with an annular spring groove at the distalmost end place of ball screw distance between bearing inner ring and uses jump ring to replace original being screwed, assembling simpler and convenient。
4, a hoop oil groove is offered at the bottommost of the bearing channel of bearing inner race, this hoop oil groove serves as the demarcation line of the left and right annular circular arc constituting bearing channel on the one hand, play the effect of oil storage lubrication on the other hand, solve in prior art, the technical problem that the arc machining wiring of the bearing channel left and right sides is not known and easily crossed the border。
5, circular arc chamfering transition is adopted to be connected between left and right annular circular arc and the left and right rib of 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 inner face adopt integration grinding method to be processed, make between left and right annular circular arc and the left and right rib of bearing channel as wholly-round transition, to prevent bearing steel ball when being subject to axial load, scratched by the sharp corner between left and right annular circular arc and left and right rib。
Accompanying drawing explanation
Fig. 1 is the structural representation of the ball screw drive mechanism in 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 diagram of ball screw combination bearing of the present invention。
Fig. 4 is the structural representation of ball screw in ball screw combination bearing of the present invention。
Fig. 5 be in ball screw combination bearing of the present invention the axial positioning spline of ball screw from the schematic diagram in terms of a direction。
Fig. 6 be in ball screw combination bearing of the present invention the axial positioning spline of ball screw from the schematic diagram in terms of another direction。
Fig. 7 is the structural representation of the annular spring groove of ball screw in ball screw combination bearing of the present invention。
Fig. 8 is the structural representation of the annular oil groove of ball screw in ball screw combination bearing of the present invention。
Fig. 9 is the structural representation of the circular arc chamfering of ball screw in ball screw combination bearing of the present invention。
Detailed description of the invention
The present invention is further described below in conjunction with the drawings and specific embodiments。
Referring to Fig. 2 and Fig. 3, the ball screw combination bearing provided in figure, including a ball screw 100 containing bearing inner race 210, ball screw 100 has a screw hole 110 coordinated with screw rod transmission, the face, hole of screw hole 110 is provided for the spiral rolling track 120 of ball moving, 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 are through by return of serve hole 141,142 and spiral rolling track 120。
Bearing 200 includes bearing inner race 210, bearing outer ring 240 and some bearing steel balls 220。Referring to Fig. 4, bearing inner race 210 is integrated with ball screw 100 to be manufactured, and is positioned at one end of ball screw 100, is provided with the bearing channel 211 of ring-type in bearing inner race 210。
Some bearing steel balls 220 are arranged in the bearing channel 211 in bearing inner race 210 by retainer 230, and bearing outer ring 240 is on some bearing steel balls 220, and between bearing inner race 210 and bearing outer ring 240, both sides are respectively provided with dust cap 250, a 250a。
Referring to Fig. 5 and Fig. 6, it is characteristic of the invention that and offer an axial positioning spline 150 on the outer surface 130 of ball screw 100, this axial positioning spline 150 is extended to the inner face 210a of bearing inner race 210 by the distalmost end of ball screw 100 distance between bearing inner ring 210。This axial positioning spline 150 1 aspect plays the effect connecting another parts, play the benchmark as processing spiral rolling track 120 initial angle precision and the bearing channel 211 returned serve on hole 141,142 positional precision and bearing inner race 210 at return of serve raceway 140 two ends on the other hand, the concordance of bearing channel 211 machining accuracy in the positional precision in the return of serve hole 141,142 at the initial angle precision of the spiral rolling track 120 being effectively ensured in ball screw 100 and return of serve raceway 140 two ends and bearing inner race 210。Another further aspect is as the reference for installation of each part, and other location and installation mode is more reliable, firm relatively。
Another one is characterized as being, using the inner face 210a of bearing inner race 210 another benchmark as the whole ball screw combination bearing of processing。
Referring to Fig. 7, the 3rd feature of the present invention is that the distalmost end place of ball screw 100 distance between bearing inner ring 210 is provided with an annular spring groove 160, in order to use jump ring to limit the part axial position being arranged in ball screw 100。
Referring to Fig. 8,4th feature of the present invention is to offer hoop oil groove 211a, a 241a at the bottommost of the bearing channel 211,241 of bearing inner race 210 and bearing outer ring 240, the hoop oil groove 211a left and right sides is respectively arranged with left and right annular circular arc 211b, 211c, 241b, 241c of constituting bearing channel 211 and 241, so this hoop oil groove 211a mono-aspect serves as the demarcation line of left and right annular circular arc 211b, 211c of constituting bearing channel 211, plays the effect of oil storage lubrication on the other hand。
Referring to Fig. 9, the 5th feature of the present invention is to adopt circular arc chamfering 214,215 transition to be connected between left and right annular circular arc 211b, 211c and the left and right rib 212,213 of bearing inner race 210。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 integration grinding method to be processed, so make between left and right annular circular arc 211b, 211c and the left and right rib 212,213 of bearing channel 211 as wholly-round transition, to prevent bearing steel ball 220 when being subject to axial load, scratched by the sharp corner between left and right annular circular arc 211b, 211c and left and right rib 212,213。
Claims (6)
1. ball screw combination bearing, including:
One ball screw containing bearing inner race, ball screw has a screw hole coordinated with screw rod transmission, the face, hole of described screw hole is provided for the spiral rolling track of ball moving, 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 are through with described spiral rolling track by hole of returning serve；Described bearing inner race is provided with the bearing channel of ring-type；
Some bearing steel balls being arranged on by retainer in the bearing channel in described bearing inner race；
It is arranged on the bearing outer ring on described bearing steel ball；
It is arranged on the dust cap on bearing inner race and bearing outer ring both sides, it is characterised in that
Offering an axial positioning spline on the outer surface of described ball screw, described axial positioning spline is extended to the inner face of bearing inner race by the distalmost end of ball screw distance between bearing inner ring；Described axial positioning spline plays the effect connecting another parts on the one hand, play the benchmark as the bearing channel on processing spiral rolling track and return of serve raceway and bearing inner race on the other hand, another further aspect is as the reference for installation of each part, with the concordance of the bearing channel machining accuracy on the positional precision in the return of serve hole of the initial angle precision and return of serve raceway two ends that ensure the spiral rolling track in ball screw and bearing inner race。
2. ball screw combination bearing as claimed in claim 1, it is characterised in that the inner face of described bearing inner race is as another benchmark processing whole ball screw combination bearing。
3. ball screw combination bearing as claimed in claim 1, it is characterised in that the distalmost end place of described ball screw distance between bearing inner ring is provided with an annular spring groove, in order to use jump ring to limit the part axial position being arranged in ball screw。
4. ball screw combination bearing as claimed in claim 1, it is characterized in that, bottommost at described bearing inner race and the bearing channel of 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 constituting bearing channel, this hoop oil groove serves as the demarcation line of the left and right annular circular arc constituting bearing channel on the one hand, plays the effect of oil storage lubrication on the other hand。
5. ball screw combination bearing as claimed in claim 4, it is characterised in that adopt circular arc chamfering transition to be connected between left and right annular circular arc and the left and right rib of bearing inner race in the bearing channel of described bearing inner race。
6. ball screw combination bearing as claimed in claim 5, it is characterized in that, hoop oil groove in the bearing channel of described bearing inner race, left annular circular arc, right annular circular arc, left rib, right rib, circular arc chamfering between left rib and right rib adopt integration grinding method to be processed。
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 CN103216523A (en) | 2013-07-24 |
| CN103216523B true 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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| CN (1) | CN103216523B (en) |
Families Citing this family (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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH597531A5 (en) * | 1976-05-11 | 1978-04-14 | Claude Betrix | Ball bearing for combined linear and rotary motion |
| 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 |
| CN203189525U (en) * | 2013-04-16 | 2013-09-11 | 慈兴集团有限公司 | Ball nut combined bearing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3132911B2 (en) * | 1992-08-26 | 2001-02-05 | エヌティエヌ株式会社 | 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 |
| JP4989432B2 (en) * | 2007-11-30 | 2012-08-01 | Ｔｈｋ株式会社 | Exercise equipment |
-
2013
- 2013-04-16 CN CN201310132923.8A patent/CN103216523B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH597531A5 (en) * | 1976-05-11 | 1978-04-14 | Claude Betrix | Ball bearing for combined linear and rotary motion |
| 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 |
| CN203189525U (en) * | 2013-04-16 | 2013-09-11 | 慈兴集团有限公司 | Ball nut combined bearing |
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| CN103216523A (en) | 2013-07-24 |
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