CN103148185A - Inner circulation type ball screw - Google Patents

Inner circulation type ball screw Download PDF

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Publication number
CN103148185A
CN103148185A CN2011104004417A CN201110400441A CN103148185A CN 103148185 A CN103148185 A CN 103148185A CN 2011104004417 A CN2011104004417 A CN 2011104004417A CN 201110400441 A CN201110400441 A CN 201110400441A CN 103148185 A CN103148185 A CN 103148185A
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CN
China
Prior art keywords
ball screw
bending
groove
internal
communicated
Prior art date
Application number
CN2011104004417A
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Chinese (zh)
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CN103148185B (en
Inventor
陈彦羽
林勇学
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上银科技股份有限公司
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Application filed by 上银科技股份有限公司 filed Critical 上银科技股份有限公司
Priority to CN201110400441.7A priority Critical patent/CN103148185B/en
Publication of CN103148185A publication Critical patent/CN103148185A/en
Application granted granted Critical
Publication of CN103148185B publication Critical patent/CN103148185B/en

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Abstract

The invention discloses an inner circulation type ball screw, which comprises a screw, a nut provided with an accommodating groove, a backflow element arranged in the accommodating groove, and a plurality of rolling elements, wherein the backflow element is provided with a first backflow channel and a second backflow channel; the first backflow channel is sequentially separated into a first front section, a first bent section and a first rear section; the first bent section is communicated with the first front section and the first rear section respectively; the second backflow channel is sequentially separated into a second front section, a second bent section and a second rear section; the second bent section is communicated with the second front section and the second rear section respectively; the first and second bent sections take the screw as an axis and form a preset included angle in the radial direction; and the rolling elements run between the screw and the nut. Therefore, the wall thickness between the backflow channels is uniform, and the durability of the inner circulation type ball screw is enhanced.

Description

Internal-circulating ball screw

Technical field

The present invention is relevant with ball screw, refers to especially a kind of internal-circulating ball screw.

Background technique

Ball screw mainly can be divided into outer circulation type and internal-circulating ball screw.External circulation type ball bolt is to be used in diversion member to be set on nut and the drainage rolling element produces circulation, and generally speaking, external circulation type ball bolt is fit to be used under the condition that helical pitch is long and nut is large and uses.And for internal-circulating ball screw, it is to add back-flow component in nut, allows rolling element produce circulation nut is inner, and relatively above-mentioned external circulation type ball bolt is adapted at using under helical pitch is short and nut is little condition.

The back-flow component that general internal-circulating ball screw uses, its backflow road are 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, the wall thickness that needs work to avoid respectively refluxing between 2 across tooth design is excessively thin, causes back-flow component to be lost efficacy by bad.Yet this measure will produce the long and invalid tooth of nut and become many adverse consequencess.In addition, back-flow component 3 as disclosed in Fig. 2, it provides that rolling element crosses over the tooth peak backflow road 4 to face mutually spacing too small, and the wall thickness of 4 of respectively refluxing is also thin, 3, the unit that causes refluxing easily damages.

Summary of the invention

Main purpose of the present invention is to provide a kind of internal-circulating ball screw, and it reduces back-flow component and does design across tooth, and the wall thickness between the backflow road is even, strengthens the durability of internal-circulating ball screw.

Edge is that in order to reach aforementioned purpose, according to a kind of internal-circulating ball screw provided by the present invention, include: a screw rod is to have one first thread groove; One nut, to be sheathed on this screw rod, this nut inner face has one second thread groove and a containing groove that coordinates this first thread groove, this containing groove has one first side and one second side, this second thread groove and this containing groove intersect and form one first fracture and one the 3rd fracture in this first side, and form one second fracture and one the 4th fracture in this second side; One back-flow component, to be located 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 to be communicated with respectively this first leading portion and this first back segment, 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 to be communicated with the 3rd fracture, and this second bending section is to be communicated with respectively this second leading portion and this second back segment, and this second back segment is communicated with the 4th fracture; This first bending section and this second bending section are to distribute along this screw rod, each other take this screw rod as axle in radially folding a predetermined angle; And a plurality of rolling elements, be to run between this first thread groove, this second thread groove, this first backflow road and this second backflow road.

Can reduce back-flow component by the present invention and do design across tooth, and the wall thickness between the backflow road is even, strengthen the durability of internal-circulating ball screw.

Description of drawings

In order to describe technical characterstic of the present invention place in detail, enumerate following preferred embodiment and coordinate description of drawings such as rear, 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's the first preferred embodiment;

Fig. 4 is the nut generalized section of the present invention's the first preferred embodiment;

Fig. 5 is the back-flow component stereogram of the present invention's the first preferred embodiment;

Fig. 6 is the back-flow component front elevation of the present invention's the first preferred embodiment;

Fig. 7 is the combination generalized section of the present invention's the first preferred embodiment;

Fig. 8 is the back-flow component stereogram of the present invention's the first preferred embodiment, shows the first backflow road and the second apart predetermined angle in backflow road;

Fig. 9 is the back-flow component side view of the present invention's the first preferred embodiment, shows the first backflow road and the second apart predetermined angle in backflow road;

Figure 10 is the nut generalized section of the present invention's the first preferred embodiment;

Figure 11 is the combination generalized section of the present invention's the first preferred embodiment;

Figure 12 is the front elevation of the present invention's the second preferred embodiment;

Figure 13 is the combination generalized section of the present invention's the second preferred embodiment;

Figure 14 is the stereogram of the present invention's the second preferred embodiment; And

Figure 15 is the stereogram of the present invention's the second preferred embodiment.

Embodiment

As Fig. 3-shown in Figure 9, a kind of internal-circulating ball screw that the present invention's the first preferred embodiment provides consists predominantly of: a screw rod 11, a nut 12, a back-flow component 13 and a plurality of rolling element 14.

This screw rod 11 is to have one first thread groove 111 and an axle center 112.

This nut 12, to be sheathed on this screw rod 11, these nut 12 inner faces have Shu the second thread groove 121 and a containing groove 122 that coordinates this first thread groove 111, this containing groove 122 has one first side 127 and one second side 128, this second thread groove 121 intersects with this containing groove 122 and forms 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, to be located 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, one first crooked 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 to be communicated with respectively this first leading portion 133 and this first back segment 135, and this first back segment 135 is communicated with this second fracture 124.One second leading portion 136, one second bending section 137 and one second back segment 138 are sequentially distinguished in this second backflow road 132, this second leading portion 136 is to be communicated with the 3rd fracture 125, this second bending section 137 is to be communicated with respectively this second leading portion 136 and this second back segment 138, and this second back segment 138 is communicated with the 4th fracture 126.This first bending section 134 and this second bending section 137 are to distribute along this screw rod 11, radially fold a predetermined angle α in this axle center 112 each other.

For clearly introducing the distribution situation of this first bending section 134 and this second bending section 137, see also Fig. 8 and shown in Figure 9.One first is online 113, is mid point and this axle center 112 that connects respectively this first bending section 134.One second is online 114, is mid point and this axle center 112 that connects respectively this second bending section 137.The user is along the axle center 112 of this screw rod 11 and towards these back-flow component 13 observations, can see this and first online 113 second online 114 fold this predetermined angle α with this, also clear this first bending section 134 and this second bending section 137 that show 112 radially folds this predetermined angle α in the axle center each other.In addition, in this preferred embodiment, it be acute angle that this first bending section 134 is scheduled to angle α be somebody's turn to do radially folded in this axle center of this second bending section 137.

This rolling element 14 respectively is to run between this first thread groove 111, this second thread groove 121, this first backflow road 131 and this second backflow road 132.

Should be noted that, be arranged in this containing groove 122 for convenience of this back-flow component 13, this preferred embodiment is to allow this containing groove 122 be to be communicated with these nut 12 1 ends, still, as Fig. 9-shown in Figure 10, also can allow this containing groove 122 run through this nut 12.So allow the user this back-flow component 13 is arranged in this nut 12 along this containing groove 122 by the outside.

Next, as Figure 11-shown in Figure 13, introduce the present invention's the second preferred embodiment, they are different from the first preferred embodiment is in this first leading portion 133 and this second leading portion 136 equal in length, 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 front embodiment, and because the material rigidity of this back-flow component 13 this nut 12 low, can't be as the loading of bearing as this nut 12, therefore occupying the area of these nut 12 inner faces, reduces this back-flow component 13, be to allow the invalid area of loading (can't) of these nut 12 inner faces 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 and the length of the second back segment 138 also equate.This back-flow component 13 is to be microscler, and its clinodiagonal thickness is equal and thickness adjacent angular is unequal.And, the crooked configuration each other of the axle center of the side of this back-flow component 13 and this screw rod 11.

By above-mentioned preferred embodiment as can be known, internal-circulating ball screw provided by the present invention has following effect:

1. the minimizing back-flow component is done the design across tooth: the back-flow component 13 that provides in the present invention, and wherein this first bending section 134 and this second bending section 137 are take this screw rod 11 as axle, apart being somebody's turn to do is scheduled to angle α setting.Thus, the wall thickness between this first backflow road 131 and this second backflow road 132 can keep, avoid as in prior art, each reflux along linear array cause respectively reflux between wall thickness excessively thin, allow back-flow component need adopt situation across the tooth design.

2. strengthen the durability of internal-circulating ball screw: the back-flow component 13 that provides in the present invention, wall thickness between this first backflow road 131 and this second backflow road 132 is even, avoid as excessively thin because of the wall thickness between each backflow road in prior art, cause back-flow component to be lost efficacy by bad, therefore can strengthen the durability of internal-circulating ball screw.

Claims (10)

1. internal-circulating ball screw includes:
One screw rod has one first thread groove and an axle center;
One nut, be sheathed on this screw rod, this nut inner face has one second thread groove and a containing groove that coordinates this first thread groove, this containing groove has one first side and one second side, this second thread groove and this containing groove intersect and form one first fracture and one the 3rd fracture in this first side, and form one second fracture and one the 4th fracture in this second side;
One back-flow component, be located 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 respectively this first leading portion and this first back segment, 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 respectively this second leading portion and this second back segment, 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, radially fold a predetermined angle in this axle center each other; And
A plurality of rolling elements run between this first thread groove, this second thread groove, this first backflow road and this second backflow road.
2. internal-circulating ball screw as claimed in claim 1, wherein: one first is online, connects respectively mid point and this axle center of this first bending section; One second is online, connects respectively mid point and this axle center of this second bending section; This first online and this second online this predetermined angle that folds.
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. internal-circulating ball screw as claimed in claim 1, wherein: this first leading portion and this second leading portion equal in length.
6. internal-circulating ball screw as claimed in claim 5, wherein: the first back segment of this back-flow component and the second back segment equal in length; This back-flow component is microscler, and its clinodiagonal thickness is equal and thickness adjacent angular is unequal.
7. internal-circulating ball screw as claimed in claim 6, wherein: the crooked configuration each other of the side of this back-flow component and the axle center of this screw rod.
8. internal-circulating ball screw as claimed in claim 6, wherein: this containing groove is communicated with this nut one end.
9. internal-circulating ball screw as claimed in claim 6, wherein: this containing groove runs through this nut.
10. internal-circulating ball screw as described in claim 1 or 6, wherein: this predetermined angle is acute angle.
CN201110400441.7A 2011-12-06 2011-12-06 Internal-circulating ball screw CN103148185B (en)

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 true CN103148185A (en) 2013-06-12
CN103148185B CN103148185B (en) 2016-02-03

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Application Number Title Priority Date Filing Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105202138A (en) * 2014-06-20 2015-12-30 上银科技股份有限公司 Internal-Circulation-Type Ball Screw

Citations (8)

* Cited by examiner, † Cited by third party
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
CN2446332Y (en) * 2000-09-26 2001-09-05 上银科技股份有限公司 Ball nut
US20040083840A1 (en) * 2002-11-04 2004-05-06 King David E. Integrated recirculation path in ball nut / ball screw
CN1549909A (en) * 2001-09-12 2004-11-24 光洋精工株式会社 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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW435626U (en) * 2000-09-01 2001-05-16 Hiwin Tech Corp A ball nut of ball screw

Patent Citations (8)

* Cited by examiner, † Cited by third party
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
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 光洋精工株式会社 Ball screw device
US20040083840A1 (en) * 2002-11-04 2004-05-06 King David E. Integrated recirculation path in ball nut / ball screw
CN101046245A (en) * 2006-03-27 2007-10-03 上银科技股份有限公司 Return way structure of ball screw

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105202138A (en) * 2014-06-20 2015-12-30 上银科技股份有限公司 Internal-Circulation-Type Ball Screw
CN105202138B (en) * 2014-06-20 2017-10-13 上银科技股份有限公司 Tangent-type interior circulation ball screw

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