CN1438437A - Non-blocked ballscrew - Google Patents
Non-blocked ballscrew Download PDFInfo
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- CN1438437A CN1438437A CN 03117500 CN03117500A CN1438437A CN 1438437 A CN1438437 A CN 1438437A CN 03117500 CN03117500 CN 03117500 CN 03117500 A CN03117500 A CN 03117500A CN 1438437 A CN1438437 A CN 1438437A
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- ball
- nut
- screw
- leading screw
- bearing
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Abstract
The invention is unstoppable ball bearing screw, it is made up of blocking circle, nut, driving bearing, ball bearing cover, and screw. The nut rings the screw, the ball bearings are in the middle of screw and nut, the driving bearing is set at two ends of the nut, the blocking circle is set at one side of the driving bearing, the ends of the screw have pegs, the character lies in that the inside of the nut is slippery camber and has no slots. The quantity of the ball bearings can increase and the pressure of each ball bearing is decreased greatly.
Description
Technical field
The present invention relates to a kind of no stall ball screw.
Background technique
No stall ball screw is a kind of of screw-drive mechanism, and it is transformed into straight line motion with spiral motion, obtains very big thrust with less torque.Leading screw still can rotate when nut moves to the leading screw two ends, thereby avoids accident to take place.Its working principle is, when leading screw rotated, ball was along the screw thread rotation of leading screw, and the ball cover is driven rotation by the rotation of ball.When nut moved to the two ends of leading screw, the ball cover was blocked by the pin of leading screw end, and at this moment ball cover and leading screw form one, rotate synchronously, thereby reach no stall.Under stressed situation, masterpiece is used on the nut, and nut is passed to thrust-bearing with power, passes to the ball cover by thrust-bearing, passes to ball by the ball cover, passes to leading screw by ball again.
At present, the problem that external like product exists is as follows: one, all ball all is positioned on the point of intersection of the thread groove of leading screw and nut inner wall circular groove, and this point of intersection is many more, and nut is long more, ball quantity is very limited, and every ball is stressed all very big; Two, the ball cover is very thin, and less than 2/8 of ball diameter, intensity is low, is easy to the breach at ball cover two ends is damaged when no stall; Three, threads of lead screw groove depth and nut inner wall annular groove depth is very shallow, and threads of lead screw groove depth and nut inner wall annular groove depth are all less than ball diameter 3/8, and this just makes the ball lifting surface area little, and shearing force is big, causes the trough rim flange, can not use; Four, for many dress balls, leading screw must be made multi-head spiral, so, improve lead angle, ball cover and nut easily produce from sliding when being subjected to load; Five, the position degree requirement of part is very high, and difficulty of processing is big, to the material requirements height; Six, bearing capacity is little, does not generally have stall leading screw load-carrying ability maximum and is no more than 500 kilograms.
Summary of the invention
In view of the defective that above-mentioned no stall ball screw exists, task of the present invention is the no stall ball screw that a kind of intensity height of design, strength are big, simple in structure, be easy to process.
Structure characteristic of the present invention has realized above-mentioned designing requirement.This nothing stall ball screw is made of back-up ring, nut, thrust-bearing, ball cover and leading screw, nut sleeve is on leading screw, ball overlaps between leading screw and nut, thrust-bearing is installed on the nut two ends, back-up ring is installed on thrust-bearing one side, the leading screw two ends have pin spacing, it is characterized in that the nut inboard is smooth surface, does not have the circular groove corresponding to threads of lead screw groove and ball.
Above-mentioned feature is the most important inventive point of the present invention.Because the nut inboard of this nothing stall ball screw is a smooth surface, there is not circular groove corresponding to threads of lead screw groove and ball, just there is not the point of intersection between thread groove and the circular groove yet, thus, ball quantity can be multiplied, the power that every ball bore reduces greatly, thereby no stall ball screw load is strengthened at double.
In order to increase the intensity of ball cover, the present invention also improves ball jacket wall thickness, and ball jacket wall thickness is increased, and is slightly less than 1/2nd of ball diameter, generally is no more than ball diameter 0.15mm, and this gap is to rotate for the ease of ball;
In order to increase the area of contact of threads of lead screw groove and ball, the present invention has also deepened the threads of lead screw groove, makes its degree of depth be slightly less than 1/2nd of ball diameter, generally is no more than 15 of ball diameters.This measure has increased the lifting surface area of ball, has reduced the shearing force to ball;
In order to reduce lift angle, ball and ball cover is not taken place from sliding, the present invention also makes single head with the leading screw spiral, reaches control from sliding.
After taking abovementioned technology, this nothing stall ball screw is compared with similar products at home and abroad, have outstanding advantage and obvious improvement, the present technique product have intensity height, bearing capacity strong, simple in structure, be easy to process, cost is low, the life-span is long characteristics, facts have proved the several times of bearing capacity of the present invention greater than external like product bearing capacity, can reach more than 2000 kilograms, be a kind of extremely strong vitality that has, and is subjected to the novel no stall ball screw of colleague's close attention both at home and abroad.
Description of drawings
The external ball cover of Fig. 1 and nut assembly structure sectional drawing and unfolded drawing
Fig. 2 the present invention does not have stall ball screw ball cover and nut assembly structure section and unfolded drawing
Fig. 3 the present invention does not have stall ball screw parts drawing
Fig. 4 the present invention does not have stall ball screw assembly structure schematic representation
The another kind of no stall ball screw assembly structure schematic representation of Fig. 5 the present invention
Embodiment
Embodiment 1
As can be seen from Figure 1, on the nut inner wall of external no stall ball screw circular groove 1 is arranged, screw thread is arranged on the leading screw, the two has a plurality of point of intersection, and all balls all are positioned on the point of intersection of leading screw, and the point of intersection is many more, nut is long more, the quantity of ball is very limited, and every ball is stressed very big, directly the load-carrying ability of the no stall leading screw of influence.
The assembly structure of the embodiment of the invention is shown in Fig. 2-4, this no stall ball screw is made of back-up ring 1, nut 2, thrust-bearing 3, ball cover 4 and leading screw 5, nut 2 is enclosed within on the leading screw 5, ball cover 4 is between leading screw 5 and nut 2, thrust-bearing 3 is installed on nut 2 two ends, back-up ring 1 is installed on thrust-bearing 3 one sides, and leading screw 5 two ends have pin 6 spacing.Prominent features of the present utility model is that nut 2 is inboard and is smooth surface, not corresponding to the circular groove of thread groove on the leading screw, therefore, also just do not have thread groove on the leading screw and the point of intersection between the circular groove on the nut.This structure is multiplied the ball that can pack into, and as shown in Figure 2, the power that every ball is born reduces greatly.
The present invention has also strengthened the wall thickness of ball cover 4 and the height of thread of leading screw 5, and the two size all is slightly less than 1/2nd of ball diameter, generally is no more than 0.15mm.
In order to reduce lift angle, ball and ball cover is not taken place from sliding, leading screw spiral of the present utility model both can be made bull, also can make single head, to reach control from sliding.
The utility model also derives another kind of opposite configuration under principle of uniformity, even leading screw is a smooth surface, do not have the point of intersection with the screw thread of nut inner wall, and all the other structures are constant, thereby realize and the identical effect of aforementioned techniques scheme.
Take technical products of the present invention, its result makes the part stress of this nothing stall ball screw disperse, and working condition is in the good condition that leaves very big surplus, and its maximum load ability can reach 2000 kilograms.For example, the present invention there is not the line thruster that the stall ball screw is used for lifting chair, require thrust to be issued to 273 kilograms abroad in limit case, life-span 5000 times, the present technique product is compared with external unidimensional product, and thrust can reach 500 kilograms, and the life-span reaches 20000 times, compared to prior art, its outstanding advantage is apparent.
The assembly structure of present embodiment as shown in Figure 5, it and embodiment 1 are the another kind of measure opposite configuration under principle of uniformity.This no stall ball screw is made of back-up ring 1, nut 2, thrust-bearing 3, ball cover 4 and leading screw 5, nut 2 is enclosed within on the leading screw 5, and ball cover 4 is between leading screw 5 and nut 2, and thrust-bearing 3 is installed on nut 2 two ends, back-up ring 1 is installed on thrust-bearing 3 one sides, and leading screw 5 two ends have pin 6 spacing.Its outstanding being characterised in that is smooth surface on the leading screw 5, not corresponding to the thread groove of nut inner wall, therefore, also just do not have thread groove on the leading screw and the point of intersection between the thread groove on the nut.This structure is multiplied the ball that can pack into, and the power that every ball is born reduces greatly.
Though the no stall ball screw that structure shown in the present embodiment forms structurally with embodiment 1 with for a principle, it is easier realization on technology, therefore, its processing cost is lower.Two kinds of structures are suitable for different demands and occasion respectively.
Claims (3)
1, a kind of no stall ball screw, constitute by back-up ring (1), nut (2), thrust-bearing (3), ball cover (4) and leading screw (5), nut (2) is enclosed within on the leading screw (5), ball cover (4) is positioned between leading screw (5) and the nut (2), thrust-bearing (3) is installed on nut (2) two ends, and back-up ring (1) is installed on thrust-bearing (3) one sides, and leading screw (5) two ends have pin (6) spacing, it is characterized in that nut (2) inboard is smooth surface, does not have the circular groove corresponding to thread groove on the leading screw.
2, no stall ball screw according to claim 1 is characterized in that the spiral on the leading screw is single head spiral or multi-head spiral.
3, a kind of no stall ball screw, constitute by back-up ring (1), nut (2), thrust-bearing (3), ball cover (4) and leading screw (5), nut (2) is enclosed within on the leading screw (5), ball cover (4) is positioned between leading screw (5) and the nut (2), thrust-bearing (3) is installed on nut (2) two ends, and back-up ring (1) is installed on thrust-bearing (3) one sides, and leading screw (5) two ends have pin (6) spacing, it is characterized in that it is smooth surface that leading screw (5) is gone up, and does not have the circular groove corresponding to nut (2) on it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117500 CN1207500C (en) | 2003-03-21 | 2003-03-21 | Non-blocked ballscrew |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117500 CN1207500C (en) | 2003-03-21 | 2003-03-21 | Non-blocked ballscrew |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1438437A true CN1438437A (en) | 2003-08-27 |
| CN1207500C CN1207500C (en) | 2005-06-22 |
Family
ID=27674186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03117500 Expired - Fee Related CN1207500C (en) | 2003-03-21 | 2003-03-21 | Non-blocked ballscrew |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1207500C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121343A (en) * | 2014-08-14 | 2014-10-29 | 瀚寅(苏州)新材料科技有限公司 | Ball screw transmission device with fixed length limiting function |
| CN104763787A (en) * | 2015-04-20 | 2015-07-08 | 洪劲松 | Ball screw transmission device |
-
2003
- 2003-03-21 CN CN 03117500 patent/CN1207500C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121343A (en) * | 2014-08-14 | 2014-10-29 | 瀚寅(苏州)新材料科技有限公司 | Ball screw transmission device with fixed length limiting function |
| CN104763787A (en) * | 2015-04-20 | 2015-07-08 | 洪劲松 | Ball screw transmission device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1207500C (en) | 2005-06-22 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |