CN1563745A - Axial reverse ball leading screw assistant - Google Patents
Axial reverse ball leading screw assistant Download PDFInfo
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- CN1563745A CN1563745A CN 200410014677 CN200410014677A CN1563745A CN 1563745 A CN1563745 A CN 1563745A CN 200410014677 CN200410014677 CN 200410014677 CN 200410014677 A CN200410014677 A CN 200410014677A CN 1563745 A CN1563745 A CN 1563745A
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- ball
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- leading screw
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Abstract
The leading screw system is composed of the leading screw, nut ball bearing and reversor. The spiral of the leading screw and nut is single head, double head end or four-head. The cross section of the spiral is the twin-arc shape or single-arc shape. The nut sleeves on the guide screw, the ball bearing are installed in the ball track of the spiral between the nut and the leading screw. The leading screw and the nut accomplished the spiral transmitting through the ball bearing, which contact with the revolving slot of the nut and the leading screw.
Description
Technical field
The present invention relates to a kind of mechanical transmission component, especially a kind of ball screw pair, specifically a kind of axial reversing type ball screw.
Background technique
Ball screw pair is the crucial basic part of mechanical industry, and its performance and quality have directly embodied the strength and the level of a national machine tool industry and even mechanical industry.Because it is little that ball screw pair has surface friction drag, ensuring smooth transmission, transmission accuracy and efficient height, long service life can realize at a high speed, characteristics such as high rigidity and highi degree of accuracy transmission, is extensively applied in machine industry and the various mechanical industry.
Ball screw pair mainly is made up of parts such as ball screw (hereinafter to be referred as leading screw), ball nut (hereinafter to be referred as nut), back device, balls, nut is contained on the leading screw, but nut does not directly contact with leading screw, it is by realizing the screw thread transmission with leading screw spiral chute and the contacted ball of nut spiral chute simultaneously, and leading screw spiral chute and nut spiral chute have been formed the raceway of ball motion.Ball is arranged in order along raceway in nut, form a ball chain, in transmission process, each ball not only self rotates, and motion opposite of generation in raceway under the drive of leading screw (or nut) with nut moving direction, if the motion to ball does not limit, every ball all will overflow outside the nut, therefore, the certain position place that must make every ball move to nut realizes back, turn back to the starting point of motion by the back circulation canal, thereby make ball form the ball chain of a sealing in nut, to realize continuous transmission, setting up the back circulation canal by the back device on nut is to make ball realize the requisite measure of back, therefore, the quality of the form of back circulation canal and back device directly has influence on the flexibility of transmission, the efficient of fluency and transmission.
In ball screw pair, back circulation canal and back device commonly used are to realize realizing in back or the nut body the total outer circulation of back and two kinds of patterns of interior circulation outside nut by ball at present:
One, outer circulation mode can be divided into two kinds of patterns again, a kind of with after the hollow steel pipe bending its two ends are inserted the nut outer ring two holes in, ball chain in the nut coil is coupled together, form closed ball chain, during transmission, ball end from bend pipe under the effect of block bead device enters the bend pipe, as shown in Figure 1.Another kind of pattern is spiral chute of processing on the cylindrical of nut, by block bead part (being equivalent to the back device) ball is imported in the spiral chute, thereby the ball chain closure is coupled together, as shown in fig. 1, in the actual processing, the pattern of the circulation through hole of these two kinds of patterns can be exchanged.These two kinds of back pattern biggest advantage are simple in structure, and are easily manufactured, and the axial dimension of nut is compact; Shortcoming is that the radial dimension of nut is bigger, and in the transmission process, the block bead position is damaged and the transmission of difficult realization high-speed overload easily.
Two, inner loop mode also has two kinds of single type and integrated types.Single type is several radial holes of processing on the cylindrical of nut, and the back device that will the have the back groove then radial hole of packing into is connected in series the ball of adjacent raceway, forms the ball chain of a plurality of closures, as shown in Figure 2.Integrated type is square three-way groove of processing on the nut cylindrical, loads onto the back device that have backward channel onesize with square three-way groove then, and in fact monolithic construction is equivalent to the stack of single type structure.The great advantage of these two kinds of back patterns is radial dimension compactnesses of nut, but its axial dimension is bigger, simultaneously because more on the back device, in transmission process, cause easily and make a pause and produce impact, so be unfavorable for needing the occasion use of ball screw pair high-speed motion for the passage of ball turnover.
Summary of the invention
It is all compact to the purpose of this invention is to provide the radial and axial size of a kind of nut, and is suitable at a high speed and axial reversing type ball screw that heavy duty is used under the kind of drive simultaneously.
Technological scheme of the present invention is:
A kind of axial reversing type ball screw, comprise leading screw, nut, ball and back device, the screw thread of leading screw and nut is a single head, double end or four-head, section shape of screw thread is Gothic or single circular arc, nut sleeve is on leading screw, ball is contained between the screw thread raceway that the screw thread of leading screw and nut forms, leading screw and nut are by realizing the screw thread transmission with leading screw spiral chute and the contacted ball of nut spiral chute simultaneously, it is characterized in that being processed with axial notch being processed with on the end face of nut on axial hole or the cylindrical, and form ball back circulation canal by the back device that is contained on the nut at nut.
The present invention has also taked following technical measures:
The axial hole of formation back circulation canal or the quantity of axial notch should equate with the number of starts on nut and the leading screw on the nut, and are evenly distributed on the circumference of nut.
Ball chain of the present invention by the nut thread raceway in the ball that on the threads of lead screw raceway, is arranged in order of envelope form, the two ends of this ball chain communicate with the two ends of above-mentioned back circulation canal respectively, also filled ball in the back circulation canal successively, it is connected together the ball chain of envelope on the threads of lead screw raceway, constitutes the ball-recirculation chain of a sealing.
Back device of the present invention be provided with one be trapped in the arc spiral groove of leading screw, prevent ball overflow nut and guide ball enter in the back device, in order to the back circuit shape of threads block of realizing ball and communicate with axial hole or axial notch be convenient to ball by its arc groove that enters.
Beneficial effect of the present invention:
1, combines the advantage that inner circulation type nut radial dimension is little and outer circulation type nut axial dimension is little in the background technique, thereby make the overall volume of ball screw pair nut of the present invention greatly reduce, its application area is further enlarged, be particularly suitable for size and the demanding occasion of overall target are used.
2, make simply.Overcome the inner circulation type ball screw pair and made complicated shortcoming, kept the advantage of inner circulation type ball screw pair simultaneously, the transmission accuracy height.
3, solved the back problem of ball in the multiple thread ball screw pair, and simple in structure, be particularly suitable for the high-speed overload occasion and use.
4, overcome the flimsy shortcoming in back position of outer circulation type ball screw pair, produced when having overcome inner circulation type ball screw pair ball back and impact and the phenomenon of making a pause easily, thereby have stable working, ensuring smooth transmission, the outstanding advantage that the life-span is long.
5, size is little, bearing capacity is big.Under the identical condition of nut length, ball screw pair of the present invention is owing to the carrying ball quantity in the raceway increases greatly, so bearing capacity is greatly improved.
When 6, the present invention is applied in the multiple thread ball screw pair, because its helical pitch strengthens, so its speed can be multiplied, and simultaneously because the quantity of the ball that carries in the raceway is more than outer circulation and interior circulating ball lead screw pair, so its bearing capacity is also grown simultaneously, thereby the present invention can be used for the high-speed overload occasion.
7, for the high-speed overload that adapts to numerical control machine tool provides desirable transmission component, be the revolution breakthrough in the ball screw industry.
Description of drawings
Fig. 1 is the structural representation of outer circulation type ball screw pair in the background technique of the present invention.
Fig. 2 is the structural representation of single type inner circulation type ball screw pair in the background technique of the present invention.
Fig. 3 is a structural representation of the present invention.
Fig. 4 is a bipitch silk bumper structure schematic representation of the present invention.
Fig. 5 is that the threads of lead screw normal direction of Fig. 4 is cut the type schematic representation.
Fig. 6 is the end-face structure schematic representation of the nut of the present invention that matches with Fig. 4.
Fig. 7 is the structural representation of nut of the present invention, also is the B-B sectional view of Fig. 6.
Fig. 8 is that the P of Fig. 7 is to view.
Fig. 9 is that the normal direction of nut thread shown in Figure 7 is cut the type schematic representation.
Figure 10 is the structural representation of facing of back device of the present invention.
Figure 11 is the side-looking structural representation of Figure 10.
Figure 12 is that the P of Figure 10 is to view.
Figure 13 is the rear view of Figure 10.
Figure 14 is that the A-A of Figure 10 is to sectional view.
Figure 15 is that the B-B of Figure 10 is to sectional view.
Figure 16 is that the C-C of Figure 12 is to sectional view.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Present embodiment is that example is illustrated with the double thread screw, and single head and other multiple thread configured balls lead screw pair can be implemented with reference to technological scheme of the present invention and present embodiment.
As shown in Figure 4.
A kind of axial reversing type ball screw, comprise double thread screw leading screw 1 (as shown in Figure 4), ball 2, nut 3, ball 2 by the axial reversing circulation through hole 4 on the nut 3 and back device 5 and by the raceway envelope that forms between the relative screw thread of leading screw 1 and nut 3 in ball screw pair, nut 3 is contained on the leading screw 1, ball 2 is contained between leading screw 1 and the nut 3, leading screw 1 and nut 2 are by realizing the screw thread transmission with leading screw spiral chute and the contacted ball 2 of nut spiral chute simultaneously, on nut 3, two ends of axial reversing circulation through hole 4 all are equipped with back device 5, ball 2 by back device 5 and axial reversing circulation through hole 4 envelopes in ball screw pair, thereby ball 2 can not be overflowed in transmission process outside the nut 3 of ball screw pair.And rotating manner of ball 2 (rotation and transmission) and working position are same as the prior art.As the axial reversing circulation through hole 4 of key point of the present invention and back device 5 thereof is at not in running order ball 2, and the working position of in running order ball 2 is same as the prior art, promptly have only the while in running order, and ball 2 is also identical with background technique with leading screw 1 and nut 3 contacted positions with leading screw 1 and nut 3 contacted ball 2.
In order to realize the high-speed overload transmission, two axial reversing circulation through holes 4 that are provided with on the nut 3 are arranged symmetrically on the circumference of nut 3, with the stationarity of stressed all even transmissions of guaranteeing leading screw 1, on nut 3, two ends of each axial reversing circulation through hole 4 all are equipped with back device 5.
Back device 5 is the comparatively common also very important parts of ball screw industry, and common mechanical engineers and technicians all can design by method separately.The structure of the back device 5 of present embodiment is respectively installed a back device 5 at two ends of each axial reversing circulation through hole 4 shown in Figure 10,11, present embodiment is because of there being two axial reversing circulation through holes 4, so four back devices 5 have been installed altogether.Be provided with one at the relative position place of back device 5 bottom leading screw 1 spiral chute and prevent that ball 2 from overflowing shape of threads block 6 nut 3 and that play the guiding role, on back device 5 and nut 3 contacted one sides, be provided with the ball 2 of being convenient to that communicates with axial reversing circulation through hole 4 and enter arc groove 7 in the axial reversing circulation through hole 4 by it, in the time of near the spiral chute of ball 2 on leading screw 1 moves to the back device 5 that is installed in nut 3 one ends, be subjected to the stopping and in the promotion lower edge of follow-up ball 2 arc groove 7 enters axial circulation through hole 4 on the axle female 3, make return movement of shape of threads block 6 on the back device 5, when the position of the back device 5 that moves to nut 3 the other ends, promptly move along the spiral chute of the arc groove on the back device 57 on leading screw 1, and under the guiding of the shape of threads block 6 on the back device 5, just in time fall into spiral chute on the leading screw 1, enter another circulation.
The structure of back device 5 and shape also can be according to the actual conditions otherwise designed, and accompanying drawing 11-17 example of the present invention has only provided a kind of back device of structural type.Back device 5 can adopt conventional method to be connected with the Placement of nut 3.
The other parts of the ball screw pair that present embodiment does not relate to are same as the prior art.
Claims (4)
1, a kind of axial reversing type ball screw, comprise leading screw, nut, ball and back device, the screw thread of leading screw and nut is a single head, double end or four-head, section shape of screw thread is Gothic or single circular arc, nut sleeve is on leading screw, ball is contained between the screw thread raceway that the screw thread of leading screw and nut forms, leading screw and nut are by realizing the screw thread transmission with leading screw spiral chute and the contacted ball of nut spiral chute simultaneously, it is characterized in that being processed with axial notch being processed with on the end face of nut on axial hole or the cylindrical, and form ball back circulation canal by the back device that is contained on the nut at nut.
2, axial reversing type ball screw according to claim 1 is characterized in that on the nut constituting the quantity of the axial hole of back circulation canal or axial notch and equates with number of starts on nut and the leading screw, and is evenly distributed on the circumference of nut.
3, axial reversing type ball screw according to claim 1, it is characterized in that the ball that envelope is arranged in order in the nut thread raceway forms ball chain on the threads of lead screw raceway, the two ends of this ball chain communicate with the two ends of above-mentioned back circulation canal respectively, also filled ball in the back circulation canal successively, it is connected together the ball chain of envelope on the threads of lead screw raceway, constitutes the ball-recirculation chain of a sealing.
4, axial reversing type ball screw according to claim 1, it is characterized in that described back device be provided with one be trapped in the arc spiral groove of leading screw, prevent ball overflow nut and guide ball enter in the back device, in order to the back circuit shape of threads block of realizing ball and communicate with axial hole or axial notch be convenient to ball by its arc groove that enters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014677 CN1563745A (en) | 2004-04-16 | 2004-04-16 | Axial reverse ball leading screw assistant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014677 CN1563745A (en) | 2004-04-16 | 2004-04-16 | Axial reverse ball leading screw assistant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1563745A true CN1563745A (en) | 2005-01-12 |
Family
ID=34478521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410014677 Pending CN1563745A (en) | 2004-04-16 | 2004-04-16 | Axial reverse ball leading screw assistant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1563745A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423860A (en) * | 2011-09-30 | 2012-04-25 | 优励聂夫（南京）科技有限公司 | Fixture for milling reverser holes on internal circulation ball nut and locating machining method thereof |
| CN104162999A (en) * | 2014-05-16 | 2014-11-26 | 苏州工业职业技术学院 | Double-station numerical control punching machine |
| CN106015342A (en) * | 2016-07-04 | 2016-10-12 | 浙江大学 | Rolling bearing with self-recirculating rolling body |
| 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 |
| CN107076284A (en) * | 2014-10-01 | 2017-08-18 | 黑田精工株式会社 | Ball screw framework deflector and ball screw framework |
-
2004
- 2004-04-16 CN CN 200410014677 patent/CN1563745A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423860A (en) * | 2011-09-30 | 2012-04-25 | 优励聂夫（南京）科技有限公司 | Fixture for milling reverser holes on internal circulation ball nut and locating machining method thereof |
| CN102423860B (en) * | 2011-09-30 | 2013-12-25 | 优励聂夫（南京）科技有限公司 | Locating machining method of fixture for milling reverser holes on internal circulation ball nut |
| CN104162999A (en) * | 2014-05-16 | 2014-11-26 | 苏州工业职业技术学院 | Double-station numerical control punching machine |
| CN107076284A (en) * | 2014-10-01 | 2017-08-18 | 黑田精工株式会社 | Ball screw framework deflector and ball screw framework |
| CN107076284B (en) * | 2014-10-01 | 2019-10-25 | 黑田精工株式会社 | Ball screw framework deflector and ball screw framework |
| CN106015342A (en) * | 2016-07-04 | 2016-10-12 | 浙江大学 | Rolling bearing with self-recirculating rolling body |
| 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 |
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| WD01 | Invention patent application deemed withdrawn after publication |