CN101182876A - Return-flow system of ball screw rod - Google Patents
Return-flow system of ball screw rod Download PDFInfo
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- CN101182876A CN101182876A CNA2006101451390A CN200610145139A CN101182876A CN 101182876 A CN101182876 A CN 101182876A CN A2006101451390 A CNA2006101451390 A CN A2006101451390A CN 200610145139 A CN200610145139 A CN 200610145139A CN 101182876 A CN101182876 A CN 101182876A
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- nut
- reflux
- hole
- reflux assembly
- return
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Abstract
The present invention discloses a reflux system of a rolling-ball screw, which consists of a screw, a nut, a plurality of reflux components and rolling balls; wherein, the fixed slot of the nut is provided with a section along the axial direction for providing the relevant embedded components of the reflux components, the section is provided with a continuous convergent hole which is connected with a through hole, the section and a helical orbit can not interfere. The opening of the reflux components for connecting the through hole is convexly provided with a steering structure which is corresponding to a convergent hole, and the steering structure and the convergent hole are correspondingly embedded; therefore, the design of the reflux components can solve the present problems that the curvature semidiameter of a reflux route is small and an embedded-component fixing slot damages the tooth-slot of the helical orbit, thus ensuring the curvature semidiameter of the reflux route can be increased, and further improving the smooth degree of the rolling balls cycling in the reflux route.
Description
Technical field
The present invention relates to a kind of return-flow system of ball screw, especially a kind of fixed groove is along being axially arranged with cross section, continuous convergent hole, the steering structure that provides reflux assembly to be convexly equipped with is nested with the cross section, make fixed groove avoid helical orbit and can not interfere, increase the return-flow system of return flow path radius of curvature simultaneously.
Background technique
Ball screw is a kind of with on the nut fit screw rod, and the mat ball is in rolling circulation and produce relative moving between screw rod and the nut relative inner.
Turn to backflow for ball being in to circulate between screw rod and the nut,, reflux and integrant circulating rolling so that ball can turn to so on the nut internal thread, be equiped with reflux assembly.
With regard to the mode that present ball screw ball refluxes, some is the outer circulation backflow of ball being derived the nut external reflux; Another kind is the inner circulating reflux that ball is directly refluxed in the nut internal female; Also or end cover type refluxes the ball in the nut internal thread is directed in the duct of nut and refluxes.
At the aforementioned ball screw that refluxes with end cover type, as Fig. 1 and shown in Figure 2, the reflux assembly of being installed in it 10 then is to have to bestow the positioning part 101 that is fixed on the nut by the solid assembly of spiral shell, and by the structure that imports end 102 and the formed return flow path 104 of turn end 103 connections; But the design of this reflux assembly 10 needs to consider that the helical pitch of ball screw can not be too little, otherwise can will destroy next curb peak structure because helical pitch is too little and the tooth peak is too little.
As shown in Figure 3 and Figure 4, on the basis of above-mentioned ball screw, improve, be formed with a part of compensation thread form 201 on the reflux assembly 20 of two bodies combination especially, the destruction tooth peak part that partly compensates thread form 201 and above-mentioned ball screw by this constitutes a complete thread form.
Yet, because above-mentioned design partly compensates the reflux assembly 20 of thread form 201, only be to be separated into 202,203 combinations of two structure bodies to form, the turning path of desiring to make ball to reflux for its reflux assembly 20 inside still is limited and can not makes turning path become big, but, if the turning path of reflux assembly 20 is too little, then easily cause having some setbacks that ball turns round in return flow path.
In sum, no matter be the integrative-structure of above-mentioned reflux assembly, it still is the body structure of tearing open of reflux assembly, as shown in Figure 2, though on the turn end 103 of return flow path, be provided with part compensation thread form 105, the broken tooth of trying to attempt with nut internal thread tooth partly constitutes a complete thread form, but because of its turn end 103 formed arc radius (R value) less, it is smooth and easy inadequately to make that ball rolls in return flow path, thus, can have influence on desired shuttling movement relation between ball and screw rod and ball and the nut unavoidably, and then cause the ball screw mechanical efficiency to reduce.
In view of this, special proposition the present invention.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, a kind of return-flow system of ball screw is provided, particularly a kind of with fixed groove along being axially arranged with cross section, continuous convergent hole, the steering structure that provides reflux assembly to be convexly equipped with is nested with the cross section, can solve fixed groove can not destroy the helical orbit alveolus and can avoid helical orbit and the problem that can not interfere, increase the return flow path radius of curvature simultaneously, effectively promote the ball screw-bar return-flow system of ball smooth degree in shuttling movement.
For solving the problems of the technologies described above, the present invention adopts the basic design of technological scheme to be: a kind of return-flow system of ball screw is made of a screw rod, a nut, several reflux assemblies and ball; The outer surface of described screw rod and the internal surface of nut have the helical orbit that cooperatively interacts, and have at least one penetration hole in the inside of nut, it is characterized in that: described penetration hole respectively is provided with the corresponding scarf with reflux assembly of at least one fixed groove in the both ends of the surface of nut; Described reflux assembly inside has return flow path and opening portion, and its opening portion is the penetration hole and the helical orbit of coupling nut respectively; The helical orbit that described screw rod and nut cooperatively interact and the return flow path of described reflux assembly are formed the independent loops system that can make ball carry out shuttling movement; Wherein,
The fixed groove of described nut is connected with penetration hole and this cross section is provided with a continuous convergent hole along the cross section that is axially arranged with the corresponding scarf of reflux assembly, and cross section and helical orbit can not be interfered; And
Described reflux assembly convexes with the steering structure in corresponding convergent hole at the opening portion that connects penetration hole, makes steering structure corresponding nested with the convergent hole.
The opening portion diameter of described steering structure is less than the opening portion diameter in convergent hole.
The helical orbit of described nut and the return flow path of reflux assembly are for joining continuously and smoothly.
Described reflux assembly is along axially splitting into two separable structure bodies, the Placement secure bond of rabbeting mutually with dowetailed housing joint, Dovetail.
Described reflux assembly is along radially splitting into two separable structure bodies, and mat hole, pin be the Placement positioning combination of interlocking mutually.
After adopting technique scheme, the present invention compared with prior art has following beneficial effect.
The return-flow system of ball screw of the present invention, with fixed groove along being axially arranged with cross section, continuous convergent hole, the steering structure that provides reflux assembly to be convexly equipped with is nested with the cross section, can solve fixed groove can not destroy the helical orbit alveolus and can avoid helical orbit and the problem that can not interfere, increase the return flow path radius of curvature simultaneously, effectively promote the smooth degree of ball in shuttling movement.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Description of drawings
Fig. 1 is the schematic representation between prior art one reflux assembly and nut;
Fig. 2 is the front view of prior art one reflux assembly;
Fig. 3 is the structural representation of its two reflux assembly of prior art;
Fig. 4 is the combination section between its two reflux assembly of prior art and nut;
Fig. 5 is the textural association figure of reflux assembly of the present invention;
Fig. 6 is the partial structurtes exploded view of reflux assembly of the present invention;
Fig. 7 is the partial structurtes constitutional diagram of reflux assembly of the present invention;
Fig. 8 is the side view of reflux assembly of the present invention and nut combination;
Fig. 9 is A-A ' the cross section structure view sub-anatomy of Fig. 8;
Figure 10 is A-A ' the cross section structure assembled sectional view of Fig. 8;
Figure 11 is reflux assembly second embodiment's of the present invention STRUCTURE DECOMPOSITION figure;
Figure 12 is reflux assembly the 3rd embodiment's of the present invention STRUCTURE DECOMPOSITION figure.
Description of reference numerals:
10 reflux assemblies, 101 positioning parts, 102 import end, 103 turn ends, 104 return flow paths, 105 thread forms, 20 reflux assemblies, 201 thread forms, 202,203 structure bodies, 1 screw rod, 2 nuts, 3 reflux assemblies, 4 balls, 11 helical orbits, 21 helical orbits, 22 penetration holes, 23 fixed grooves, 24 cross sections, 25 convergent holes, 31 return flow paths, 311 opening portions, 312 opening portions, 32 steering structures, 33 dowetailed housing joints, 34 Dovetails, 35 holes, 36 pins
Embodiment
To shown in Figure 10, the return-flow system of ball screw of the present invention mainly comprises: a screw rod 1, a nut 2, several reflux assemblies 3 and ball 4 as Fig. 5; The internal surface of the outer surface of this screw rod 1 and nut 2 has the helical orbit 11,21 that cooperatively interacts, and have at least one penetration hole 22 in the inside of nut 2, this penetration hole 22 respectively is provided with at least one fixed groove 23 corresponding and reflux assembly 3 scarf in the both ends of the surface of nut 2; These reflux assembly 3 inside have return flow path 31 and two opening portions 311,312, the penetration hole 22 and the helical orbit 21 of 311,312 difference of its this opening portion coupling nut 2; Helical orbit 11,21 that described screw rod 1 and nut 2 cooperatively interact and the return flow path of described reflux assembly 3 31 are formed an independent loops structure that makes ball 4 carry out shuttling movement; Wherein:
The fixed groove 23 of described nut 2 is connected with penetration hole 22 and cross section 24 is provided with a continuous convergent hole 25 along the cross section 24 that is axially arranged with reflux assembly 3 corresponding scarves, and cross section 24 and helical orbit 21 can not be interfered; And described reflux assembly 3 is connecting the steering structure 32 that penetration hole 22 opening portions then convex with corresponding convergent hole 25, make steering structure 32 corresponding nested with convergent hole 25, wherein comparatively smooth and easy for this opening portion 311 is connected with this penetration hole 22, more this opening portion 311 can be made into opening portion 311 diameters of diameter less than this convergent hole 25; The above is the mutual alignment and the annexation thereof of each associated component of first embodiment of the invention.
Extremely shown in Figure 10 as Fig. 8, because angle of lead can not be too little on the ball screw design principle, reason is that the too little then relative thread form of angle of lead is also too little, therefore can destroy down one complete thread form, so the design principle of return flow path is leaned on the backflow turning path of ball fully, be still in the past and be limited and can not make turning path become big,, then easily caused having some setbacks that ball turns round in return flow path if the turning path of reflux assembly is less.
The design of reflux assembly can solve the problem that the less and scarf fixed groove of existing return flow path radius of curvature destroys the helical orbit alveolus by this, the return flow path radius of curvature can be increased, also promote the ball smooth degree of flow circuit therebetween relatively, and then the real benefit in the use of performance ball screw.
To shown in Figure 12, reflux assembly structure of the present invention is not restricted to the form that one constitutes, and similarly, the design of following form also can be arranged as Figure 11:
At first, about other alternate embodiment of above-mentioned first embodiment's reflux assembly,
Can adopt other second embodiment's design for the reflux assembly of ball screw, wherein utilize reflux assembly 3, adopt dowetailed housing joint 33, the Dovetail 34 mode secure bond of interlocking mutually along axially splitting into two separable structure bodies.
Moreover, about other alternate embodiment of above-mentioned second embodiment's reflux assembly,
Can adopt other the 3rd embodiment's design for the reflux assembly of ball screw, wherein utilize reflux assembly 3 along radially splitting into two separable structure bodies, mat hole 35, pin 36 be the mode positioning combination of interlocking mutually.
Claims (4)
1. the return-flow system of a ball screw is made of a screw rod, a nut, several reflux assemblies and ball; The outer surface of described screw rod and the internal surface of nut have the helical orbit that cooperatively interacts, and have at least one penetration hole in the inside of nut, it is characterized in that: described penetration hole respectively is provided with the corresponding scarf with reflux assembly of at least one fixed groove in the both ends of the surface of nut; Described reflux assembly inside has return flow path and opening portion, and its opening portion is the penetration hole and the helical orbit of coupling nut respectively; The helical orbit that described screw rod and nut cooperatively interact and the return flow path of described reflux assembly are formed the independent loops system that can make ball carry out shuttling movement; Wherein,
The fixed groove of described nut is connected with penetration hole and this cross section is provided with a continuous convergent hole along the cross section that is axially arranged with the corresponding scarf of reflux assembly, and cross section and helical orbit can not be interfered; And
Described reflux assembly convexes with the steering structure in corresponding convergent hole at the opening portion that connects penetration hole, makes steering structure corresponding nested with the convergent hole.
2. the return-flow system of a kind of ball screw according to claim 1, it is characterized in that: the opening portion diameter of described steering structure is less than the opening portion diameter in convergent hole.
3. the return-flow system of a kind of ball screw according to claim 1 is characterized in that: described reflux assembly is along axially splitting into two separable structure bodies, the Placement secure bond of rabbeting mutually with dowetailed housing joint, Dovetail.
4. the return-flow system of a kind of ball screw according to claim 1 is characterized in that: described reflux assembly is along radially splitting into two separable structure bodies, and mat hole, pin be the Placement positioning combination of interlocking mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101451390A CN100529471C (en) | 2006-11-13 | 2006-11-13 | Return-flow system of ball screw rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101451390A CN100529471C (en) | 2006-11-13 | 2006-11-13 | Return-flow system of ball screw rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101182876A true CN101182876A (en) | 2008-05-21 |
| CN100529471C CN100529471C (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101451390A Active CN100529471C (en) | 2006-11-13 | 2006-11-13 | Return-flow system of ball screw rod |
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| CN (1) | CN100529471C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588542A (en) * | 2011-01-05 | 2012-07-18 | 上银科技股份有限公司 | Ball screw with backflow assembly |
| CN103104669A (en) * | 2011-11-15 | 2013-05-15 | 上银科技股份有限公司 | Ball screw with backflow components |
| CN106979293A (en) * | 2017-05-05 | 2017-07-25 | 大连高金数控集团有限公司 | Ball screw assembly, with disome separate type back unit |
-
2006
- 2006-11-13 CN CNB2006101451390A patent/CN100529471C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588542A (en) * | 2011-01-05 | 2012-07-18 | 上银科技股份有限公司 | Ball screw with backflow assembly |
| CN102588542B (en) * | 2011-01-05 | 2015-08-19 | 上银科技股份有限公司 | The ball screw of tool reflux assembly |
| CN103104669A (en) * | 2011-11-15 | 2013-05-15 | 上银科技股份有限公司 | Ball screw with backflow components |
| CN103104669B (en) * | 2011-11-15 | 2016-06-08 | 上银科技股份有限公司 | The ball screw rod of a kind of tool back-flow component |
| CN106979293A (en) * | 2017-05-05 | 2017-07-25 | 大连高金数控集团有限公司 | Ball screw assembly, with disome separate type back unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100529471C (en) | 2009-08-19 |
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