CN201517595U - Ball screw device - Google Patents
Ball screw device Download PDFInfo
- Publication number
- CN201517595U CN201517595U CN2009201523203U CN200920152320U CN201517595U CN 201517595 U CN201517595 U CN 201517595U CN 2009201523203 U CN2009201523203 U CN 2009201523203U CN 200920152320 U CN200920152320 U CN 200920152320U CN 201517595 U CN201517595 U CN 201517595U
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- ball
- nut body
- circulation
- piece
- circulation piece
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- Expired - Lifetime
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Abstract
A ball screw device comprises a screw and a ball nut, wherein the ball nut is sleeved and arranged on the screw in a sliding manner; the ball nut is provided with a nut body, a first circulating piece and a second circulating piece, wherein the first circulating piece is arranged in the nut body in the axial direction of the screw; and the second circulating piece is arranged in the nut body in the radial direction perpendicular to the axial direction. Additionally, the nut body of the ball screw device adopts the manufacture method that only the corresponding position on the nut body is required to be perforated, so that the first circulating piece and the second circulating piece can be arranged in the nut body. Therefore, the manufacture method of the ball nut is simpler, so that the material waste caused by the cutting technology is avoided and the manufacture cost of the whole ball screw device is reduced. In addition, the size of the ball nut is not increased due to the first circulating piece and the second circulating piece, so that the travel of the ball nut can not be compressed and shortened.
Description
Technical field
The utility model is about a kind of ball screw device.
Background technique
In various ball screw devices,, rotation can be converted to linear transmission by cooperating of screw rod and ball nut.In addition, ball by start capable of circulation and ball nut and screw rod are fitted to each other again, reduce the frictional force between ball nut and screw rod, make ball screw device more smooth-going when operation.
Please refer to shown in Figure 1ly, a kind of known ball screw device A1 comprises a screw rod 1 and a ball nut 2, and ball nut 2 is sheathed and be slidingly installed on the screw rod 1.Wherein, ball nut 2 has a nut body 21 and a circulation piece 22.Circulation piece 22 is arranged on the outer surface of nut body 21, and circulation piece 22 connects with corresponding ball channel respectively, to form a circulating path.Therefore, in circulating path, roll, can make screw rod 1 carry out relative spiral motion, and ball nut 2 is moved along screw rod 1 with ball nut 2 by a plurality of ball B.
Yet, in ball screw device A1, can be arranged on nut body 21 outer surfaces in order to make circulation piece 22, nut body 21 is to come the nut body 21 of cutting part earlier by modes such as turnning and milling processing.But, so not only make the production method of nut body 21 become comparatively complicated, and the material that nut body 21 machines away also can cause cost waste, and then cause the fabricating cost of ball screw device A1 to improve.
In addition, because circulation piece 22 is not the tangent direction setting of corresponding ball B motion, therefore, also cause ball screw device A1 to damage easily and can't run up because of ball B drops.
Therefore, how to design a kind of production method comparatively simple, can reduce cost and keep the stable ball screw device that runs up, become one of important topic.
The model utility content
The purpose of this utility model provide a kind of production method comparatively simple, can reduce cost and keep the stable ball screw device that runs up.
The utility model can be realized by the following technical solutions.
A kind of ball screw device of the present utility model comprises a screw rod and a ball nut.Ball nut is sheathed and be slidingly installed on the screw rod, and have a nut body, one first circulation piece and one second circulation piece, first circulation piece is to be axially disposed within the nut body along one of screw rod, and second circulation piece is radially to be arranged in the nut body along one of vertical axial.
Aforesaid ball screw device, wherein said ball nut also has a circulation canal, and described nut body, described first circulation piece and described second circulation piece are respectively equipped with the described circulation canal of at least a portion.
Aforesaid ball screw device, wherein said screw rod and described nut body have a thread groove respectively, corresponding formation one ball channel with described screw flight groove of the thread groove of described nut body.
Aforesaid ball screw device, the common circulating path that forms of wherein said circulation canal and described ball channel.
Aforesaid ball screw device, wherein said first circulation piece and described second circulation piece have a guide portion respectively, and described guide portion is the two ends of corresponding described circulation canal respectively.
Aforesaid ball screw device, wherein said first circulation piece engages with described nut body respectively with described second circulation piece, gummed, sealed, fastening, chimeric or its combination, fixes.
Aforesaid ball screw device, wherein said ball nut also has positioning piece, is arranged on described second circulation piece.
Aforesaid ball screw device, wherein said locating piece engages with described nut body, gummed, sealed, fastening, chimeric or its combination, fixes.
Aforesaid ball screw device wherein also comprises: a dust preventing component is arranged on a side of described nut body, and replaces described first circulation piece.
By technique scheme, ball screw device of the present utility model has following advantage at least:
Ball screw device of the present utility model is to utilize first circulation piece being axially disposed within the nut body along screw rod, and second circulation piece along radially being arranged in the nut body of vertical axial, promptly be that first circulation piece and second circulation piece all are arranged in the nut body.Therefore, the production method of nut body of the present utility model only needs position corresponding on the nut body to hole, and first circulation piece and second circulation piece can be arranged in the nut body.Whereby, the production method of ball nut is comparatively simple, can avoid milling process to cause the waste of material, to reduce ball screw device integral manufacturing cost.And the size of ball nut can not increase because of first circulation piece and second circulation piece, so the stroke of ball nut can not be compressed yet and shortens.
Description of drawings
Fig. 1 is a kind of schematic representation of known ball screw device;
Fig. 2 is the schematic representation of a kind of ball screw device of the utility model preferred embodiment; And
Fig. 3 is first circulation piece of the present utility model, second circulation piece and ball fit applications mode schematic representation.
The primary clustering symbol description:
1: screw rod 2: ball nut
21: nut body 22: circulation piece
3: screw rod 31,411: thread groove
4: ball nut 41: the nut body
Circulation piece 421,431 in 42: the first: guide portion
5: dust preventing component A1: ball screw device
A2: ball screw device B: ball
D: I radially: axially
P: circulation canal S: set screw
Embodiment
Hereinafter with reference to correlative type, a kind of ball screw device according to the utility model preferred embodiment is described.
Please refer to shown in Figure 2ly, it is the decomposing schematic representation of the ball screw device A2 of the utility model preferred embodiment.Ball screw device A2 comprises a screw rod 3 and a ball nut 4.
What deserves to be mentioned is, first circulation piece 42 and second circulation piece 43 can make up (for example utilizing modes such as engaging, gummed, fastening) by two assemblies of ejection formation respectively and form, perhaps directly come one-body molded by injection molding method, perhaps directly process one-body molded to a material (for example metallic material), yet this is nonrestrictive.In addition, ball nut 4 also can have positioning piece 44, is arranged on second circulation piece 43, whereby, after second circulation piece 43 is assembled in nut body 41, can carry out fixing on the Vertical direction (as the radially D among Fig. 2) by 44 pairs second circulation pieces of locating piece 43.Moreover, locating piece 44 can engage with nut body 41, gummed, sealed, fastening, chimeric or its combination, fixes, in the present embodiment, for example utilize set screw S sealed and engage mode and be fixed as example with locating piece 44 and nut body 41, yet this is nonrestrictive.
In addition, in the present embodiment, first circulation piece 42 and second circulation piece 43 also can have a guide portion 421,431 respectively, corresponding respectively the two ends of guide portion 421,431 at circulation canal P, and guide portion 421,431 correspondences are in the tangent direction of described ball B motion, and guide portion 421,431 for example can have the cambered surface with ball B form fit.Therefore, with reference to Fig. 2 and shown in Figure 3, can guide ball B by the guide portion 421,431 of first circulation piece 42 and second circulation piece 43 move to first circulation piece 42 or second circulation piece 43 smooth-goingly by the ball channel of 41 of screw rod 3 and nut bodies, perhaps guide ball B is moved to 41 of screw rod 3 and nut bodies by first circulation piece 42 or second circulation piece 43 ball channel smooth-goingly, can avoid ball B to drop whereby because of the section difference between ball channel and the circulation canal P.
Therefore, the ball screw device A2 of present embodiment is by being arranged on first circulation piece 42 and second circulation piece 43 in the nut body 41, can make the production method of nut body 41 only need the position of on nut body 41 corresponding first circulation piece 42 and second circulation piece 43 to hole, win circulation piece 42 and second circulation piece 43 can be embedded in the nut body 41.Whereby, not only the production method of ball nut 4 is comparatively simple, can avoid milling process to cause the waste of material, to reduce ball screw device A2 integral manufacturing cost.And the size of ball nut 4 can not increase because of first circulation piece 42 and second circulation piece 43, so the stroke of ball nut 4 can not be compressed yet and shortens.In addition, because guide portion 421,431 correspondences of first circulation piece 42 and second circulation piece 43 are in the tangent direction of described ball B motion, whereby when ball screw device A2 runs up, described ball B still can move in circulating path smooth-goingly, and the stability in the time of can improving ball screw device A2 whereby and run up is to improve the product reliability.
In addition, in the present embodiment, ball screw device A2 can comprise that also a dust preventing component 5 is arranged on a side of nut body 41, and replaces first circulation piece 42, is example at this with the both sides that two dust preventing component 5 are arranged on nut body 41.Whereby, removing can be in order to striking off chip or the dust of being infected with at screw rod 3, and avoids also can carrying out fixing on the axial I to first circulation piece 42 outside foreign matter enters between ball nut 4 and the screw rod 3.
In sum, according to ball screw device of the present utility model is to utilize first circulation piece being axially disposed within the nut body along screw rod, and second circulation piece along radially being arranged in the nut body of vertical axial, promptly be that first circulation piece and second circulation piece all are arranged in the nut body.Therefore, the production method of nut body of the present utility model only needs position corresponding on the nut body to hole, and first circulation piece and second circulation piece can be arranged in the nut body.Whereby, the production method of ball nut is comparatively simple, can avoid milling process to cause the waste of material, to reduce ball screw device integral manufacturing cost.And the size of ball nut can not increase because of first circulation piece and second circulation piece, so the stroke of ball nut can not be compressed yet and shortens.In addition, because all corresponding tangent direction setting of first circulation piece and second circulation piece in the ball motion, therefore, when ball screw device runs up, described ball still can move in circulating path smooth-goingly, and the stability in the time of can improving ball screw device whereby and run up is to improve the product reliability.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present utility model and category, and, all should be included in the claim of the present utility model its equivalent modifications of carrying out or change.
Claims (9)
1. a ball screw device is characterized in that, comprising:
One screw rod; And
One ball nut, sheathed and be slidingly installed on the described screw rod, and have a nut body, one first circulation piece and one second circulation piece, described first circulation piece is to be axially disposed within the described nut body along one of described screw rod, and described second circulation piece is radially to be arranged in the described nut body along vertical described axial one.
2. ball screw device according to claim 1 is characterized in that described ball nut also has a circulation canal, and described nut body, described first circulation piece and described second circulation piece are respectively equipped with the described circulation canal of at least a portion.
3. ball screw device according to claim 2 is characterized in that, described screw rod and described nut body have a thread groove respectively, corresponding formation one ball channel with described screw flight groove of the thread groove of described nut body.
4. ball screw device according to claim 3 is characterized in that, the common circulating path that forms of described circulation canal and described ball channel.
5. ball screw device according to claim 2 is characterized in that, described first circulation piece and described second circulation piece have a guide portion respectively, and described guide portion is the two ends of corresponding described circulation canal respectively.
6. ball screw device according to claim 1 is characterized in that, described first circulation piece engages with described nut body respectively with described second circulation piece, gummed, sealed, fastening, chimeric or its combination, fixes.
7. ball screw device according to claim 1 is characterized in that described ball nut also has positioning piece, is arranged on described second circulation piece.
8. ball screw device according to claim 7 is characterized in that, described locating piece engages with described nut body, gummed, sealed, fastening, chimeric or its combination, fixes.
9. ball screw device according to claim 1 is characterized in that, also comprises:
One dust preventing component is arranged on a side of described nut body, and replaces described first circulation piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201523203U CN201517595U (en) | 2009-04-29 | 2009-04-29 | Ball screw device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201523203U CN201517595U (en) | 2009-04-29 | 2009-04-29 | Ball screw device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201517595U true CN201517595U (en) | 2010-06-30 |
Family
ID=42498318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201523203U Expired - Lifetime CN201517595U (en) | 2009-04-29 | 2009-04-29 | Ball screw device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201517595U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912646A (en) * | 2013-01-09 | 2014-07-09 | 上银科技股份有限公司 | Internal circulation type ball screw |
-
2009
- 2009-04-29 CN CN2009201523203U patent/CN201517595U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912646A (en) * | 2013-01-09 | 2014-07-09 | 上银科技股份有限公司 | Internal circulation type ball screw |
| CN103912646B (en) * | 2013-01-09 | 2016-06-29 | 上银科技股份有限公司 | The ball screw of internal-circulation type |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160711 Address after: China Taiwan New Taipei City Forest District more than 3 Road No. 123 Patentee after: TBI Motion Technology Co., Ltd. Address before: China Taiwan Taipei County Tucheng City, Zhongshan Road No. 91 Patentee before: Comtop Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100630 |