CN103711857B - External-circulation ball screw - Google Patents
External-circulation ball screw Download PDFInfo
- Publication number
- CN103711857B CN103711857B CN201210370094.2A CN201210370094A CN103711857B CN 103711857 B CN103711857 B CN 103711857B CN 201210370094 A CN201210370094 A CN 201210370094A CN 103711857 B CN103711857 B CN 103711857B
- Authority
- CN
- China
- Prior art keywords
- foot
- face
- rolling groove
- gateway
- screw rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
- F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
An external-circulation ball screw comprises a screw body and a nut. The screw body is provided with a first rolling groove, the nut is provided with a second rolling groove, a circulating component comprises a first foot portion, a second foot portion and a connecting portion, the first foot portion is provided with a first inner end point and a first outer end point which are on a first end face, the second foot portion is provided with a second inner end point and a second outer end point which are on a second end face, a circulating passage forms a first inlet-outlet and a second inlet-outlet on the first end face and the second end face, first thickness is spaced between the first inlet-outlet and the first inner end point, second thickness is spaced between the first inlet-outlet and the first outer end point, the second thickness is more than three times of the first thickness, third thickness is spaced between the second inlet-outlet and the second inner end point, fourth thickness is spaced between the second inlet-outlet and the second outer end point, and the fourth thickness is more than three times of the third thickness. Consequently, the circumstance that a groove wall of the second rolling groove is occupied is reduced, and probability that a thread of the nut is damaged is lowered.
Description
Technical field
The present invention is relevant with ball screw, particularly relates to a kind of external circulation ball screw rod.
Background technology
Press, ball screw is to play the part of considerable role in the field of Linear transmission, lowered by arranging ball therein
Frictional force between screw rod and nut, allows screw rod and nut is able to quick and accurately relative motion each other.
More and more fine with frame for movement, the volume of ball screw needs also with the limited space of use occasion to contract
Little.In many ball screw row show, external circulation type ball bolt is quite suitable for being used in the less use occasion in space.As figure
Shown in 1- Fig. 3, tubular type external circulation ball screw rod (circulating tube type ball screw apparatus) comprises
Have a screw rod 1, its surface has one first rolling groove 2 of spiral, a nut 3, have a perforation 4 and by this perforation 4 sheathed
In this screw rod 1, this nut has one second rolling groove 5 of spiral in this perforation 4 hole wall, relatively this first rolling groove 2, and this first
Rolling groove 2 and this second rolling groove 5 are collectively forming a load path.Plural rolling assembly 6, is limited in this load path and moves
Dynamic.When screw rod 1 (or nut 3) rotates, by the rolling of rolling assembly 6, drive nut 3 (or screw rod 1) axial movement.Additionally,
Also have a circulation pipe 7, be plugged in nut 3, two ends are connected with the first rolling groove 2 and the second rolling groove 5 respectively, when rolling assembly 6
After this load path moves and enters circulation pipe 7, will can return to again in load path, form Infinite Cyclic.Here, needing especially
Illustrate, due to when ball screw operates and the second not all rolling groove has rolling assembly to pass through, therefore usually will have
Part second rolling groove that rolling assembly passes through is referred to as effective tooth area (Effective Thread Zone, E.T.Z.), effective tooth
Area needs the actual force born from rolling assembly in the running of ball screw, and other does not have the second of rolling assembly process
Rolling groove is referred to as invalid tooth area (Invalid Thread Zone, I.T.Z.), and it need not bear the force from rolling assembly.
As shown in Fig. 2 however, in above-mentioned tubular type external circulation ball screw rod, circulation pipe 7 is arranged in nut 3 and connects this and bear
Lotus path, the position that circulation pipe 7 tube wall occupies part the second rolling groove 5 cell wall in effective tooth area in nut 3 makes cell wall become
Thin, easily make way for the second rolling groove 5 cell wall in effective tooth area crumble generation nut break tooth problem.
Content of the invention
It is an object of the invention to provide a kind of external circulation ball screw rod is to improve defect present in known technology.
For achieving the above object, according to a kind of external circulation ball screw rod provided by the present invention, it includes：One screw rod,
Its surface has one first rolling groove of spiral；One nut, has and bores a hole and be set in this screw rod by this perforation, this nut
In the hole wall of this perforation, this first rolling groove relatively has one second rolling groove of spiral, this first rolling groove and this second rolling
Dynamic groove is collectively forming a load path；One recirculation assembly, has one first foot positioned at two ends, one second foot, and connects
This first foot and a connecting portion of this second foot, this first foot has a first end face, and has in this first end face
End points and one first the outer end point in one first, this second foot has a second end face, and has one second in this second end face
Interior end points and one second the outer end point, have a circulation canal inside this recirculation assembly, this first foot of this circulation canal insertion, should
Connecting portion and this second foot, and form, in this first end face and this second end face, one the being connected with this second rolling groove respectively
One gateway and one second gateway, this first gateway with this in first end points and this first the outer end point be respectively separated one first
Thickness and a second thickness, this second thickness is more than the three times of this first thickness, this second gateway and this end points in second
Be respectively separated one the 3rd thickness and one the 4th thickness with this second the outer end point, the 4th thickness be the 3rd thickness three times with
On；This first foot and this second foot are arranged in this nut, and this first foot projection one first tongue is in this first rolling
Groove, this second foot projection one second tongue is in this first rolling groove；And plural number rolling assembly, it is limited in this load path
Or move in this circulation canal.
Thus, this first gateway more known closer to this end points in first, reduce simultaneously and occupy second in effective tooth area
Rolling groove cell wall, therefore reduce nut and break odontogenetic chance.
Brief description
Fig. 1 is known external circulation ball screw rod；
Fig. 2 is known external circulation ball screw rod assembly generalized section, shows nut section；
Fig. 3 is known external circulation ball screw rod assembly generalized section, the nut section of display not yet device circulation pipe；
Fig. 4 is the stereoscopic figure of the present invention first preferred embodiment；
Fig. 5 is the stereo decomposing body figure of the present invention first preferred embodiment；
Fig. 6 is the generalized section of the present invention first preferred embodiment；
Fig. 7 is the assembly axonometric chart of the present invention first preferred embodiment, shows recirculation assembly；
Fig. 8 is the component front view of the present invention first preferred embodiment, shows nut and recirculation assembly；
Fig. 9 is the assembly generalized section along 8-8 hatching in Fig. 7, shows nut；
Figure 10 is the assembly three-dimensional exploded view of the present invention first preferred embodiment；
Figure 11 is the assembly axonometric chart of the present invention second preferred embodiment, shows recirculation assembly；
Figure 12 is the assembly generalized section of the present invention second preferred embodiment, shows nut；
Figure 13 is the assembly axonometric chart of the present invention the 3rd preferred embodiment, shows recirculation assembly；
Figure 14 is the assembly partial enlarged drawing of the present invention the 3rd preferred embodiment, the first foot of display recirculation assembly；
Figure 15 is the assembly partial enlarged drawing of the present invention the 3rd preferred embodiment, the second foot of display recirculation assembly；
Figure 16 is the assembly axonometric chart of the present invention the 3rd preferred embodiment, shows recirculation assembly, shows the first gateway phase
It is cut in the first the outer end point, and the second gateway is tangential on the second the outer end point；
Figure 17 is the assembly axonometric chart of the present invention the 3rd preferred embodiment, shows recirculation assembly, and display the first foot is in the
End face forms the 3rd cut, and the second foot forms the 4th cut in second end face；
Figure 18 is the assembly partial enlarged drawing of the present invention the 3rd preferred embodiment, the first foot of display recirculation assembly；With
And
Figure 19 is the assembly partial enlarged drawing of the present invention the 3rd preferred embodiment, the second foot of display recirculation assembly.
Primary clustering symbol description in accompanying drawing：
11 screw rod 111 first rolling groove
12 nuts 121 are bored a hole
122 second rolling groove 13 recirculation assembly
131 first foot's 131a first end faces
End points 131c first the outer end point in 131b first
131d first lacks block 131e the 3rd and lacks block
132 second foot's 132a second end faces
End points 132c second the outer end point in 132b second
132d second lacks block 132e the 4th and lacks block
133 connecting portion 134 first gateway
135 second gateway 136 first tongue
137 second tongue 138 first cut
139 second cut 14 rolling assembly
15 body 151 composition surface
16 conjunction 161 composition surface
171 the 3rd cut 172 the 4th cut
C circulation canal L load path
T1 first thickness T2 second thickness
T3 the 3rd thickness T4 the 4th thickness.
Specific embodiment
Technical characterstic in order to describe the present invention in detail is located, and lifts a following preferred embodiment and coordinates brief description such as
Afterwards, wherein：
As shown in Fig. 4-Figure 10, a kind of external circulation ball screw rod that the present invention first preferred embodiment is provided, main bag
Contain：One screw rod 11, a nut 12, a recirculation assembly 13 and plural rolling assembly 14.
This screw rod 11, its surface has one first rolling groove 111 of spiral.
This nut 12, has a perforation 121 and is set in this screw rod 11 by this perforation 121, this nut 12 is in this perforation
121 hole walls, relatively this first rolling groove 111 have one second rolling groove 122 of spiral, this first rolling groove 111 and this second
Rolling groove 122 is collectively forming a load path L.
This recirculation assembly 13, has one first foot 131 positioned at two ends, one second foot 132, and connects this first foot
Portion 131 and a connecting portion 133 of this second foot 132.This first foot 131 has first end face 131a, and this first
End face 131a has end points 131b and one first the outer end point 131c in one first, and this second foot 132 has a second end face
132a, and in this second end face 132a, there is end points 132b and one second the outer end point 132c in one second, in this recirculation assembly 13
Portion has a circulation canal C, this first foot 131 of this circulation canal C insertion, this connecting portion 133 and this second foot 132, and
Respectively first end face 131a and second end face 132a formed one first gateway 134 being connected with this second rolling groove 122 and
One second gateway 135, this first gateway 134 and this second gateway 135 external form profile are in slightly for U-shaped.
In this first preferred embodiment, this first gateway 134 and this end points 131b and this first the outer end point in first
131c is respectively separated first thickness T1 and second thickness T2, and this second thickness T2 is more than the three times of this first thickness T1,
This second gateway 135 with this in second end points 132b and this second the outer end point 132c be respectively separated one the 3rd thickness T3 and 1 the
Four thickness T4, the 4th thickness T4 are more than the three times of the 3rd thickness T3.
This first foot 131 and this second foot 132 are to be arranged in this nut 12, and this first foot 131 projection 1 the
, in this first rolling groove 111, this second foot 132 projection one second tongue 137 is in this first rolling groove 111 for one tongue 136.
Respectively this rolling assembly 14, is limited in this load path L or this circulation canal C and moves.
Here it should be noted that, ball screw running when and the second not all rolling groove 122 has rolling assembly 14 warp
Cross, therefore be usually that the part having rolling assembly 14 to pass through the second rolling groove 122 is referred to as effective tooth area (Effective Thread
Zone, E.T.Z.), effective tooth area needs the actual force born from rolling assembly 14 in the running of ball screw, and other is not
The second rolling groove having rolling assembly 14 process is referred to as invalid tooth area (Invalid Thread Zone, I.T.Z.), and it need not
Bear the force from rolling assembly 14.
The external circulation ball screw rod being provided by the invention described above first preferred embodiment, this first gateway 134 is relatively
Known closer to this end points 131b in first, reduce simultaneously and occupy the second rolling groove 122 cell wall in effective tooth area, therefore reduce nut
Break odontogenetic chance.
It is noted that this recirculation assembly 13 is to distinguish one along this circulation canal C in this preferred embodiment
Body 15 and a conjunction 16, this body 15 and this conjunction 16 respectively have a composition surface 151,161, this body 15 and this conjunction
16 is along vertical this recirculation assembly 13 of formation in 151,161 mutual groups of this two composition surface, so first makes this body 15 and this combination
Part 16, then form this recirculation assembly 13 according to respectively this composition surface 151,161, convenient this recirculation assembly 13 of making.
As shown in Figure 11-Figure 12, a kind of external circulation ball screw rod that the present invention second preferred embodiment is provided, it is with the
It is at one preferred embodiment difference：This first gateway 134 is tangential on this end points 131b in first, and this second gateway
135 are tangential on this end points 132b in second.
The external circulation ball screw rod being provided by the invention described above second preferred embodiment, this first gateway 134 is direct
With this in first end points 131b tangent, this second gateway 135 directly with this in second end points 132b tangent, aforementioned refer to this
The external form profile of one gateway 134 and the second gateway 135 is in slightly for U-shaped, and this first gateway 134 of the present embodiment indication
Directly with this end points 131b is tangent in first, this second gateway 135 direct end points 132b is tangent in second with this, refer to U-shaped
Profile and first in end points 132b is tangent in end points 131b and second, the second rolling groove 122 in effective tooth area will be occupied simultaneously
The situation of cell wall reduces, therefore reduces nut and break odontogenetic chance.
As shown in Figure 13-Figure 15, a kind of external circulation ball screw rod that the present invention the 3rd preferred embodiment is provided, it is with the
One preferred embodiment difference is：This first foot 131 removes one first in this first end face 131a and lacks block 131d, forms connection
This first gateway 134 and one first cut 138 of this first foot 131 medial surface, this second foot 132 is in this second end face
132a removes one second and lacks block 132d, forms this second gateway 135 of connection and the one second of this second foot 132 medial surface and breaks
Mouth 139.
The external circulation ball screw rod being provided by the invention described above the 3rd preferred embodiment, this first gateway 134 and should
Second gateway 135 is not affecting respectively in the case of this rolling assembly 14, is will to occupy effectively compared with first and second preferred embodiment again
In tooth area, the situation of the second rolling groove 122 cell wall reduces, and reduces nut simultaneously again and breaks odontogenetic chance.
As Figure 16-Figure 19 it is worth mentioning at this point that, in above-mentioned all of preferred embodiment, to reduce this recirculation assembly
13, this first gateway 134 can also be allowed to be tangential on this first the outer end point 131c, and this second gateway 135 be tangential on this
Two the outer end points 132c.Or, allow this first foot 131 remove one the 3rd in this first end face 131a and lack block 131e, form connection
This first gateway 134 and one the 3rd cut 171 of this first foot 131 lateral surface, this second foot 132 is in this second end face
132a removes one the 4th and lacks block 132e, forms this second gateway 135 of connection and the one the 4th of this second foot 132 lateral surface and breaks
Mouth 172.
Claims (4)
1. a kind of external circulation ball screw rod, it includes：
One screw rod, its surface has one first rolling groove of spiral；
One nut, has and bores a hole and be set in this screw rod by this perforation, this nut in the hole wall of this perforation, relatively this first
Rolling groove has one second rolling groove of spiral, and this first rolling groove and this second rolling groove are collectively forming a load path；
One recirculation assembly, has one first foot positioned at two ends, one second foot, and connects this first foot and this crus secunda
One connecting portion in portion, this first foot has a first end face, and has end points in one first in this first end face, this crus secunda
Portion has a second end face, and has end points in one second in this second end face, has a circulation canal inside this recirculation assembly,
This first foot of this circulation canal insertion, this connecting portion and this second foot, and respectively in this first end face and this second end face
Form one first gateway that is connected with this second rolling groove and one second gateway, this first gateway is tangential on this in first
End points, and this second gateway is tangential on this end points in second；This first foot and this second foot are arranged in this nut, and should
, in this first rolling groove, this second foot projection one second tongue is in this first rolling groove for first foot projection one first tongue；
And
Plural rolling assembly, is limited in this load path or this circulation canal and moves；
Wherein, allow this first foot be formed in this first end face and connect the one the of this first gateway and this first foot lateral surface
Three cuts, this second foot forms this second gateway of connection and the one the 4th of this second foot lateral surface in this second end face and breaks
Mouthful.
2. a kind of external circulation ball screw rod, it includes：
One screw rod, its surface has one first rolling groove of spiral；
One nut, has and bores a hole and be set in this screw rod by this perforation, this nut in the hole wall of this perforation, relatively this first
Rolling groove has one second rolling groove of spiral, and this first rolling groove and this second rolling groove are collectively forming a load path；
One recirculation assembly, has one first foot positioned at two ends, one second foot, and connects this first foot and this crus secunda
One connecting portion in portion, this first foot has a first end face, and this second foot has a second end face, inside this recirculation assembly
There is a circulation canal, this first foot of this circulation canal insertion, this connecting portion and this second foot, and respectively in this first end
Face and this second end face form one first gateway being connected with this second rolling groove and one second gateway, and connect this
One first cut of one gateway and this first foot medial surface, and connects this second gateway and this second foot medial surface
One second cut；This first foot and this second foot are arranged in this nut, and this first foot projection one first tongue is in this
First rolling groove, this second foot projection one second tongue, in this first rolling groove, wherein, allows this first foot in this first end
Face forms one the 3rd cut connecting this first gateway and this first foot lateral surface, and this second foot is in this second end face shape
Become to connect one the 4th cut of this second gateway and this second foot lateral surface；And
Plural rolling assembly, is limited in this load path or this circulation canal and moves.
3. external circulation ball screw rod as claimed in claim 2, wherein, this recirculation assembly is to distinguish one along this circulation canal
Body and a conjunction, this body and this conjunction respectively have a composition surface, and this body and this conjunction are along this two joint
Vertical this recirculation assembly of formation is mutually organized in face.
4. external circulation ball screw rod as claimed in claim 2, wherein, this first foot is in this first end mask one first outer end
Point, this second foot tool has one second the outer end point in this second end face, and this first gateway is tangential on this first the outer end point, and
This second gateway is tangential on this second the outer end point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210370094.2A CN103711857B (en) | 2012-09-28 | 2012-09-28 | External-circulation ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210370094.2A CN103711857B (en) | 2012-09-28 | 2012-09-28 | External-circulation ball screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103711857A CN103711857A (en) | 2014-04-09 |
| CN103711857B true CN103711857B (en) | 2017-02-22 |
Family
ID=50405092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210370094.2A Active CN103711857B (en) | 2012-09-28 | 2012-09-28 | External-circulation ball screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103711857B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3948973B2 (en) * | 2002-02-07 | 2007-07-25 | Ｔｈｋ株式会社 | Screw device with lubricant application function |
| CN200986000Y (en) * | 2006-11-20 | 2007-12-05 | 朱清华 | Winding ball screw rod |
| TWI314620B (en) * | 2007-05-25 | 2009-09-11 | Hiwin Tech Corp | External circulation type ball screw |
| US20090071272A1 (en) * | 2007-09-18 | 2009-03-19 | Hiwin Technologies Corp. | Ball screw device having circulating device |
| US20100180707A1 (en) * | 2009-01-19 | 2010-07-22 | Wen-Chia Wu | Rolling Element Screw |
-
2012
- 2012-09-28 CN CN201210370094.2A patent/CN103711857B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103711857A (en) | 2014-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102090072B1 (en) | Hollow rack bar and method of manufacturing hollow rack bar | |
| DE102013224683A1 (en) | ENDOSCOPIC HEAD AND ENDOSCOPE | |
| AR068895A1 (en) | THREADED UNION FOR STEEL PIPES | |
| CN103097752B (en) | Linear motion device | |
| CN108700230A (en) | Screw joint for steel pipe | |
| CN103711857B (en) | External-circulation ball screw | |
| DE102006021862B4 (en) | Joint arrangement for a vehicle | |
| CN106460924A (en) | Linear motion guide device | |
| ES2604660T3 (en) | Method of manufacturing a guide rail for a screen | |
| EP2913607A3 (en) | Geothermal heat probe base, geothermal heat tube and geothermal heat probe | |
| US9188210B2 (en) | External circulation type ball screw device | |
| EP2431149A3 (en) | Seal and method for its manufacture | |
| CN106133344A (en) | There are double steel bolts of impact extrusion connecting portion and for the method manufacturing this bolt | |
| CN105121873A (en) | Motion guide device | |
| EP2034277A1 (en) | Electronic sensor and method for manufacturing a sensor | |
| DE102009012366A1 (en) | Sealing element i.e. sealing sleeve, for sealing pressure piston movably arranged in cylindrical housing of cylinder/piston arrangement for hydraulic motor vehicle brake assembly, has anti-friction structure formed on surface in sections | |
| JP4952503B2 (en) | Double heat exchanger | |
| TWI731518B (en) | Medical drainage tube made of silicone | |
| BR112014003294A2 (en) | male and female tubular connection | |
| CN106493186A (en) | A kind of mould of automobile steering device connecting rod | |
| ES2421456T3 (en) | Plug connector for the connection of conduits for liquid or gaseous media | |
| JP5953751B2 (en) | Guide device and flow path forming method | |
| CN105822669B (en) | Linear slide rail | |
| JP5487272B1 (en) | Circulating tube type ball screw | |
| KR101958810B1 (en) | Structure for preventing crack of nipple and manufacturing method of nipple having structure for preventing crack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |