CN103148185B - Internal-circulating ball screw - Google Patents
Internal-circulating ball screw Download PDFInfo
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- CN103148185B CN103148185B CN201110400441.7A CN201110400441A CN103148185B CN 103148185 B CN103148185 B CN 103148185B CN 201110400441 A CN201110400441 A CN 201110400441A CN 103148185 B CN103148185 B CN 103148185B
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Abstract
A kind of internal-circulating ball screw, includes: a screw rod; One nut, tool one containing groove; One back-flow component, be located at this containing groove, have one first backflow road and one second backflow road, one first leading portion, one first bending section and one first back segment are sequentially distinguished in this first backflow road, and this first bending section is communicated with this first leading portion and this first back segment respectively; One second leading portion, one second bending section and one second back segment are sequentially distinguished in this second backflow road, and this second bending section is communicated with this second leading portion and this second back segment respectively; This first bending section and this second bending section are with this screw rod for axle, fold a predetermined angle in radial direction; And multiple rolling element, be run between this screw rod and this nut.Thus, the uniform wall thickness between each backflow road, strengthens the durability of internal-circulating ball screw.
Description
Technical field
The present invention is relevant with ball screw, refers to a kind of internal-circulating ball screw especially.
Background technique
Ball screw mainly can be divided into outer circulation type and internal-circulating ball screw.External circulation type ball bolt is used in nut to arrange diversion member and drainage rolling element produces circulation, and generally speaking, external circulation type ball bolt uses under being applicable to being used in the condition that helical pitch is long and nut is large.And for internal-circulating ball screw, it adds back-flow component in nut, allow rolling element produce circulation in nut inside, relatively above-mentioned external circulation type ball bolt uses under being comparatively adapted at the condition that helical pitch is short and nut is little.
The back-flow component that general internal-circulating ball screw uses, its backflow road is arranged in a linear usually, as depicted in figs. 1 and 2.Only, the mode that above-mentioned back-flow component 1 has linear array backflow road 2 can produce following problem, as shown in Figure 1, during backflow road 2 linear array of back-flow component 1, meet with the ball screw of less helical pitch, need do to avoid the wall thickness between each backflow road 2 excessively thin across tooth design, cause back-flow component badly to be lost efficacy.But this measure will produce the adverse consequences that nut is long and invalid tooth change is many.In addition, the back-flow component 3 disclosed by Fig. 2, its adjacent spacing providing rolling element to cross over the backflow road 4 at tooth peak is too small, and each wall thickness refluxed between road 4 is also thin, causes 3, backflow unit easily to damage.
Summary of the invention
Main purpose of the present invention is to provide a kind of internal-circulating ball screw, and it reduces the design of back-flow component do across tooth, and the uniform wall thickness between backflow road, strengthen the durability of internal-circulating ball screw.
Edge is, in order to reach aforementioned object, according to a kind of internal-circulating ball screw provided by the present invention, includes: a screw rod, is have one first thread groove; One nut, be sheathed on this screw rod, this nut inner face has one second thread groove and a containing groove that coordinate this first thread groove, this containing groove has one first side and one second side, this second thread groove is crossing with this containing groove and form one first fracture and one the 3rd fracture in this first side, and forms one second fracture and one the 4th fracture in this second side; One back-flow component, be provided at this containing groove, this back-flow component has one first backflow road and one second backflow road, one first leading portion, one first bending section and one first back segment are sequentially distinguished in this first backflow road, this first leading portion is communicated with this first fracture, this first bending section is communicated with this first leading portion and this first back segment respectively, and this first back segment is communicated with this second fracture; One second leading portion, one second bending section and one second back segment are sequentially distinguished in this second backflow road, and this second leading portion is communicated with the 3rd fracture, and this second bending section is communicated with this second leading portion and this second back segment respectively, and this second back segment is communicated with the 4th fracture; This first bending section and this second bending section distribute along this screw rod, each other with this screw rod for axle folds a predetermined angle in radial direction; And multiple rolling element, be run on this first thread groove, this second thread groove, this first backflow road and this second backflow road between.
The design of back-flow component do across tooth can be reduced by the present invention, and the uniform wall thickness between backflow road, strengthen the durability of internal-circulating ball screw.
Accompanying drawing explanation
In order to describe technical characterstic place of the present invention in detail, enumerate following preferred embodiment and coordinate accompanying drawing illustrate as after, wherein:
Fig. 1 is existing back-flow component schematic diagram;
Fig. 2 is existing back-flow component schematic diagram;
Fig. 3 is the exploded view of the present invention first preferred embodiment;
Fig. 4 is the nut generalized section of the present invention first preferred embodiment;
Fig. 5 is the back-flow component stereogram of the present invention first preferred embodiment;
Fig. 6 is the back-flow component front elevation of the present invention first preferred embodiment;
Fig. 7 is the combination generalized section of the present invention first preferred embodiment;
Fig. 8 is the back-flow component stereogram of the present invention first preferred embodiment, and display first backflow road and the second backflow road are separated by predetermined angle;
Fig. 9 is the back-flow component side view of the present invention first preferred embodiment, and display first backflow road and the second backflow road are separated by predetermined angle;
Figure 10 is the nut generalized section of the present invention first preferred embodiment;
Figure 11 is the combination generalized section of the present invention first preferred embodiment;
Figure 12 is the front elevation of the present invention second preferred embodiment;
Figure 13 is the combination generalized section of the present invention second preferred embodiment;
Figure 14 is the stereogram of the present invention second preferred embodiment; And
Figure 15 is the stereogram of the present invention second preferred embodiment.
Embodiment
As shown in Fig. 3-Fig. 9, a kind of internal-circulating ball screw that the present invention first preferred embodiment provides, consists predominantly of: screw rod 11, nut 12, back-flow component 13 and a multiple rolling element 14.
This screw rod 11 has one first thread groove 111 and an axle center 112.
This nut 12, be sheathed on this screw rod 11, this nut 12 inner face has Shu second thread groove 121 and a containing groove 122 that coordinate this first thread groove 111, this containing groove 122 has one first side 127 and one second side 128, this second thread groove 121 is crossing with this containing groove 122 and form one first fracture 123 and one the 3rd fracture 125 in this first side 127, and forms one second fracture 124 and one the 4th fracture 126 in this second side.
This back-flow component 13, be provided at this containing groove 122, this back-flow component 13 has one first backflow road 131 and one second backflow road 132, one first leading portion 133,1 first bending 134 sections and one first back segment 135 are sequentially distinguished in this first backflow road 131, this first leading portion 133 is communicated with this first fracture 123, this first bending section 134 is communicated with this first leading portion 133 and this first back segment 135 respectively, and this first back segment 135 is communicated with this second fracture 124.One second leading portion 136,1 second bending section 137 and one second back segment 138 is sequentially distinguished in this second backflow road 132, this second leading portion 136 is communicated with the 3rd fracture 125, this second bending section 137 is communicated with this second leading portion 136 and this second back segment 138 respectively, and this second back segment 138 is communicated with the 4th fracture 126.This first bending section 134 and this second bending section 137 distribute along this screw rod 11, and the radial direction each other in this axle center 112 folds a predetermined angle α.
For clearly introducing the distribution situation of this first bending section 134 and this second bending section 137, refer to shown in Fig. 8 and Fig. 9.One first online 113, be the mid point and this axle center 112 that connect this first bending section 134 respectively.One second online 114, be the mid point and this axle center 112 that connect this second bending section 137 respectively.User is along the axle center 112 of this screw rod 11 and observe towards this back-flow component 13, can be seen this and first online 113 second online 114 fold this predetermined angle α with this, also this first bending section 134 and this second bending section 137 of clear display, folds this predetermined angle α in axle center 112 radial direction each other.In addition, in this preferred embodiment, this first bending section 134 and this second bending section 137 in this predetermined angle α folded by this axle center radial direction be acute angle.
Respectively this rolling element 14, be run on this first thread groove 111, this second thread groove 121, this first backflow road 131 and this second backflow road 132 between.
Should be noted that, be arranged in this containing groove 122 for convenience of this back-flow component 13, this preferred embodiment allows this containing groove 122 be communicated with this nut 12 one end, but, as shown in Fig. 9-Figure 10, this containing groove 122 also can be allowed to run through this nut 12.So allow user can be arranged in this nut 12 along this containing groove 122 by this back-flow component 13 by outside.
Next, as shown in figures 11-13, introduce the present invention second preferred embodiment, they are different from the first preferred embodiment be in: the length of this first leading portion 133 and this second leading portion 136 is equal, so allows the side of this back-flow component 13 along with the changes in distribution of this first bending section 134 and this second bending section 137.Thus, the gross area of this back-flow component 13 will reduce in comparatively front embodiment, and because material rigidity comparatively this nut 12 of this back-flow component 13 low, loading cannot be born as this nut 12, therefore the area that this back-flow component 13 occupies this nut 12 inner face reduces, be allow the invalid area of loading (cannot) of this nut 12 inner face reduce, strengthen the durability of internal-circulating ball screw of the present invention.In addition, in this preferred embodiment, the first back segment 135 of this back-flow component 13 is also equal with the length of the second back segment 138.This back-flow component 13 is that its clinodiagonal thickness thickness that is equal and adjacent angular is then unequal in microscler.And, the side of this back-flow component 13 and the crooked configuration each other of the axle center of this screw rod 11.
From above-mentioned preferred embodiment, internal-circulating ball screw provided by the present invention has following effect:
1. reducing back-flow component does across the design of tooth: the back-flow component 13 provided in the present invention, wherein this first bending section 134 and this second bending section 137 be with this screw rod 11 for axle, be separated by this predetermined angle α and arrange.Thus, the wall thickness between this first backflow road 131 and this second backflow road 132 can keep, and avoids as in prior art, and each backflow road causes each backflow road partition thicker than thin along linear array, allows back-flow component need adopt situation about designing across tooth.
2. strengthen the durability of internal-circulating ball screw: the back-flow component 13 provided in the present invention, uniform wall thickness between this first backflow road 131 and this second backflow road 132, avoid as in prior art because the wall thickness between each backflow road is excessively thin, cause back-flow component badly to be lost efficacy, therefore the durability of internal-circulating ball screw can be strengthened.
Claims (9)
1. an internal-circulating ball screw, includes:
A screw rod, has first thread groove and an axle center;
A nut, be sheathed on this screw rod, this nut inner face has second thread groove and a containing groove that coordinate this first thread groove, this containing groove has first side and second side, this second thread groove is crossing with this containing groove and form first fracture and the 3rd fracture in this first side, and forms second fracture and the 4th fracture in this second side;
A back-flow component, be located at this containing groove, this back-flow component has one first backflow road and one second backflow road, first leading portion, first bending section and first back segment are sequentially distinguished in this first backflow road, this first leading portion is communicated with this first fracture, this first bending section is communicated with this first leading portion and this first back segment respectively, and this first back segment is communicated with this second fracture; Second leading portion, second bending section and second back segment are sequentially distinguished in this second backflow road, and this second leading portion is communicated with the 3rd fracture, and this second bending section is communicated with this second leading portion and this second back segment respectively, and this second back segment is communicated with the 4th fracture; This first bending section and this second bending section distribute along this screw rod, and the radial direction each other in this axle center folds a predetermined angle; This first leading portion comparatively this second leading portion is short, and this first back segment is this second rear segment length comparatively; And
Multiple rolling element, run on this first thread groove, this second thread groove, this first backflow road and this second backflow road between.
2. internal-circulating ball screw as claimed in claim 1, wherein: one is first online, connects mid point and this axle center of this first bending section respectively; One second online, connects mid point and this axle center of this second bending section respectively; This first onlinely second onlinely folds this predetermined angle with this.
3. internal-circulating ball screw as claimed in claim 1, wherein: this containing groove is communicated with this nut one end.
4. internal-circulating ball screw as claimed in claim 1, wherein: this containing groove runs through this nut.
5. an internal-circulating ball screw, includes:
A screw rod, has first thread groove and an axle center;
A nut, be sheathed on this screw rod, this nut inner face has second thread groove and a containing groove that coordinate this first thread groove, this containing groove has first side and second side, this second thread groove is crossing with this containing groove and form first fracture and the 3rd fracture in this first side, and forms second fracture and the 4th fracture in this second side;
A back-flow component, be located at this containing groove, this back-flow component has one first backflow road and one second backflow road, first leading portion, first bending section and first back segment are sequentially distinguished in this first backflow road, this first leading portion is communicated with this first fracture, this first bending section is communicated with this first leading portion and this first back segment respectively, and this first back segment is communicated with this second fracture; Second leading portion, second bending section and second back segment are sequentially distinguished in this second backflow road, and this second leading portion is communicated with the 3rd fracture, and this second bending section is communicated with this second leading portion and this second back segment respectively, and this second back segment is communicated with the 4th fracture; This first bending section and this second bending section distribute along this screw rod, and the radial direction each other in this axle center folds a predetermined angle;
Multiple rolling element, runs on this first thread groove, this second thread groove, between this first backflow road and this second backflow road, the length of this first leading portion and this second leading portion is equal, and the first back segment of this back-flow component is equal with the length of the second back segment; And
This back-flow component is microscler, and its clinodiagonal thickness thickness that is equal and adjacent angular is then unequal.
6. internal-circulating ball screw as claimed in claim 5, wherein: the axle center crooked configuration each other of the side of this back-flow component and this screw rod.
7. internal-circulating ball screw as claimed in claim 5, wherein: this containing groove is communicated with this nut one end.
8. internal-circulating ball screw as claimed in claim 5, wherein: this containing groove runs through this nut.
9. the internal-circulating ball screw as described in claim 1 or 5, wherein: this predetermined angle is acute angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110400441.7A CN103148185B (en) | 2011-12-06 | 2011-12-06 | Internal-circulating ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110400441.7A CN103148185B (en) | 2011-12-06 | 2011-12-06 | Internal-circulating ball screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103148185A CN103148185A (en) | 2013-06-12 |
| CN103148185B true CN103148185B (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110400441.7A Active CN103148185B (en) | 2011-12-06 | 2011-12-06 | Internal-circulating ball screw |
Country Status (1)
| Country | Link |
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| CN (1) | CN103148185B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI535956B (en) * | 2014-06-20 | 2016-06-01 | Hiwin Tech Corp | Tangential inner circulation ball screw |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0198750A1 (en) * | 1985-04-01 | 1986-10-22 | Novatome | Method of manufacturing a deviating element for a screw-and-nut assembly with internal ball recirculation |
| DE3628621A1 (en) * | 1986-08-22 | 1988-03-24 | Manfred Holzer Kugelgewindespi | Recirculating ball drive |
| DE3100349C2 (en) * | 1981-01-08 | 1989-03-23 | Siegmund H. Ing.(Grad.) 7440 Nuertingen De Kaiser | |
| JPH08121561A (en) * | 1994-10-03 | 1996-05-14 | Beaver Precision Prod Inc | Ball nut and its preparation |
| TW435626U (en) * | 2000-09-01 | 2001-05-16 | Hiwin Tech Corp | A ball nut of ball screw |
| CN2446332Y (en) * | 2000-09-26 | 2001-09-05 | 上银科技股份有限公司 | Ball nut |
| CN1549909A (en) * | 2001-09-12 | 2004-11-24 | ������������ʽ���� | Ball screw device |
| CN101046245A (en) * | 2006-03-27 | 2007-10-03 | 上银科技股份有限公司 | Return way structure of ball screw |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040083840A1 (en) * | 2002-11-04 | 2004-05-06 | King David E. | Integrated recirculation path in ball nut / ball screw |
-
2011
- 2011-12-06 CN CN201110400441.7A patent/CN103148185B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3100349C2 (en) * | 1981-01-08 | 1989-03-23 | Siegmund H. Ing.(Grad.) 7440 Nuertingen De Kaiser | |
| EP0198750A1 (en) * | 1985-04-01 | 1986-10-22 | Novatome | Method of manufacturing a deviating element for a screw-and-nut assembly with internal ball recirculation |
| DE3628621A1 (en) * | 1986-08-22 | 1988-03-24 | Manfred Holzer Kugelgewindespi | Recirculating ball drive |
| JPH08121561A (en) * | 1994-10-03 | 1996-05-14 | Beaver Precision Prod Inc | Ball nut and its preparation |
| TW435626U (en) * | 2000-09-01 | 2001-05-16 | Hiwin Tech Corp | A ball nut of ball screw |
| CN2446332Y (en) * | 2000-09-26 | 2001-09-05 | 上银科技股份有限公司 | Ball nut |
| CN1549909A (en) * | 2001-09-12 | 2004-11-24 | ������������ʽ���� | Ball screw device |
| CN101046245A (en) * | 2006-03-27 | 2007-10-03 | 上银科技股份有限公司 | Return way structure of ball screw |
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| Publication number | Publication date |
|---|---|
| CN103148185A (en) | 2013-06-12 |
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