CN201757165U - Ball screw assembly with single-nut shifted lead self-pretightening clearance adjusting structure - Google Patents
Ball screw assembly with single-nut shifted lead self-pretightening clearance adjusting structure Download PDFInfo
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- CN201757165U CN201757165U CN2010205145907U CN201020514590U CN201757165U CN 201757165 U CN201757165 U CN 201757165U CN 2010205145907 U CN2010205145907 U CN 2010205145907U CN 201020514590 U CN201020514590 U CN 201020514590U CN 201757165 U CN201757165 U CN 201757165U
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- nut
- screw
- ball screw
- screw rod
- balls
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Abstract
The utility model relates to a ball screw assembly with a single-nut shifted lead self-pretightening clearance adjusting structure, comprising a screw rod which is transversely arranged, the outer periphery of the screw rod is provided with external threads, the screw rod is sleeved nuts; the internal surface of the nut is provided with internal threads; a thread port of each of the internal threads is respectively corresponding to the thread port of the external port; and both of the thread ports are spliced to form a plurality of rings of raceways; dustproof rings are arranged between the two ends of the nut and the screw rod, the outer surface of the nut is connected with a pressure plate via a plurality of bolts, the pressure plate is provided with two inserting tubes which are arranged left and right; the port at one end of each of the inserting tubes corresponds to one raceway; and a plurality of balls which are arrayed in a row are arranged in the plurality rings of raceways and each inserting tube. The ball screw assembly is easy for starting, excellent in smoothness of the balls, high in sensitivity, small in friction loss, high in transmission efficiency, short in return stroke of the balls, good in rigidity, and simple and convenient for assembling with reduced operation resistance so that the operation precision is improved and the radial size of the nuts is small.
Description
Technical field:
The utility model relates to a kind of single nut displacement helical pitch from prefastening gap-adjusting structure ball screw pair.
Background technique:
Along with engineering goods at a high speed, efficient, automation direction development, numerical control machining center and electromechanical integration machinery etc., and feeding drives and constantly carries.Location, high-speed cutting, high-speed driving have proposed brand-new requirement to the rolling function parts fast, owing to linear electric motor cost an arm and a leg, and the control system complexity, ball screw is still the selection of high-speed driving the best.The ball screw transmission is to place an amount of ball as middle transmission body between the raceway of leading screw and nut, and constituting ball by ball back passage can the power screw of shuttling movement repeatedly in the closed-loop path.The feed speed of screw component is the product of leading screw rotating speed and leading screw helical pitch, therefore realizes that the high speed feed of screw component has two kinds of methods: the one, improve the leading screw rotating speed, and the 2nd, increase the leading screw helical pitch.The general at present double nuts structure that adopts promptly is with two nuts on leading screw, can cause whole screw component internal structure comparatively complicated like this, and volume is also bigger, the while poor processability, and assembly technology is loaded down with trivial details.
Summary of the invention:
The purpose of this utility model is in order to overcome above deficiency, a kind of compact structure to be provided, and is easy to loading and unloading, reliable operation, and the single nut displacement helical pitch of good rigidly is from prefastening gap-adjusting structure ball screw pair.
The purpose of this utility model is achieved through the following technical solutions: a kind of single nut displacement helical pitch comprises a leading screw of laterally placing from prefastening gap-adjusting structure ball screw pair, and the excircle of leading screw is provided with outside thread, is with nut on the leading screw, the F of nut
1The surface is provided with internal thread, the respectively corresponding externally threaded screw mouth of the screw mouth of each internal thread, and both piece together the multi-turn raceway, be equipped with dust ring between the two end part of nut and the leading screw, the outer surface of nut is connected with pressing plate by a plurality of screws, is provided with two intubate in the pressing plate, is provided with about two intubate, the all corresponding raceway of the port of each intubate one end is equipped with a plurality of balls that are arranged in a row setting in the multi-turn raceway and in each intubate.
The utility model compared with prior art has the following advantages: the utility model is to realize that by producing addendum modification Δ L with nut inner thread displacement helical pitch pretension transfers the crack between two groups of circulating rings in a nut, the size of pretightening force has ± Δ L and radial clearance and decide, place an amount of ball in the raceway between leading screw and nut as middle transmission body, guarantee that by intubate ball forms closed shuttling movement repeatedly between leading screw and nut, two groups of circulating rings are realized the pretension of ball screw by the helical pitch addendum modification Δ L on the nut, addendum modification Δ L on the nut realizes by machine tool mechanical transmission feeding in the nut course of working, only be provided with a nut in the utility model, simple in structure, size is the compactest, and produce addendum modification ± Δ L by means of nut inner thread displacement helical pitch and realize that pretension transfers the crack, the size of pretightening force is decided by ± Δ L and radial clearance.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Number in the figure: 1-leading screw, 2-outside thread, 3-nut, 4-internal thread, 5-dust ring, 6-screw, 7-pressing plate, 8-intubate, 9-ball.
Embodiment:
In order to deepen understanding of the present utility model, the utility model is described in further detail below in conjunction with embodiment and accompanying drawing, and this embodiment only is used to explain the utility model, does not constitute the qualification to the utility model protection domain.
Show the utility model single nut as Fig. 1
2The position helical pitch is from a kind of embodiment of prefastening gap-adjusting structure ball screw pair, comprise a leading screw 1 of laterally placing, the excircle of leading screw 1 is provided with outside thread 2, be with nut 3 on the leading screw 1, the internal surface of nut 3 is provided with internal thread 4, the screw mouth of the respectively corresponding outside thread 2 of the screw mouth of each internal thread 4, and both piece together the multi-turn raceway, be equipped with dust ring 5 between the two end part of nut 3 and the leading screw 1, prevent iron filings, dust cooling liquid etc. enters loop body inside, the outer surface of nut 3 is connected with pressing plate 7 by a plurality of screws 6, be provided with two intubate 8 in the pressing plate 7, intubate 8 is fixed by pressing plate 7, and two intubate about 8 are provided with, the all corresponding raceway of the port of each intubate 8 one end is in the multi-turn raceway, and be equipped with a plurality of balls 9 that are arranged in a row setting in each intubate 8.
The utility model is located between two groups of circulating rings in the ball nut, and produces addendum modification ± Δ L by means of nut inner thread displacement helical pitch and realize that pretension transfers the crack, and the size of pretightening force is decided by ± Δ L and radial clearance, can produce higher sport efficiency.The utlity model has running resistance and reduce, start easily, the ball fluency is good, and is highly sensitive, and frictional loss is few, the transmission efficiency height, the ball backhaul is shorter, and rigidity is better, and running accuracy is improved, and the nut radial dimension is little, and part number reduces like this, when assembling, and easier advantage.
The utility model is that rotation motion is converted into straight line motion, or straight line motion is converted into the ideal product of rotation motion.Its function is to change into straight line motion with rotatablely moving, and the significance of this development becomes bearing into sliding action from scroll actions exactly.Owing to have very little surface friction drag, the utility model is widely used in various industry equipments and precision type instrument.The utility model is the transmission component of normal use on toolroom machine and the precision optical machinery, and its major function is to convert linear motion to rotatablely moving, or changes torque axis into axial repetitiousness active force, has highi degree of accuracy, reversibility and high-efficiency characteristics simultaneously concurrently.There are a lot of balls doing rolling motion between lead screw shaft of the present utility model and the screw, so can obtain higher sport efficiency.The utility model so starting torque is minimum, can not occur the such creeping phenomenon of sliding movement owing to be to utilize the ball motion, can guarantee to realize accurate little feeding.The utility model can add and gives pressure, can make axial clearance reach negative value owing to give pressure, and then obtains higher rigidity (giving pressure by adding to ball in the leading screw, when being actually used in mechanical device etc., because the repulsion of ball can make the rigidity of screw portion strengthen).So the utility model is owing to sport efficiency height, the little high speed feed of can realizing of heating move.
Claims (1)
1. a single nut displacement helical pitch is from prefastening gap-adjusting structure ball screw pair, comprise a leading screw (1) of laterally placing, the excircle of described leading screw (1) is provided with outside thread (2), it is characterized in that: be with nut (3) on the described leading screw (1), the internal surface of described nut (3) is provided with internal thread (4), the screw mouth of the respectively corresponding described outside thread of the screw mouth of each described internal thread (4) (2), and both piece together the multi-turn raceway, be equipped with dust ring (5) between the two end part of described nut (3) and the leading screw (1), the outer surface of described nut (3) is connected with pressing plate (7) by a plurality of screws (6), be provided with two intubate (8) in the described pressing plate (7), be provided with about two described intubate (8), the all corresponding described raceway of the port of each described intubate (8) one end is in the described raceway of multi-turn, and be equipped with a plurality of balls (9) that are arranged in a row setting in each described intubate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205145907U CN201757165U (en) | 2010-08-31 | 2010-08-31 | Ball screw assembly with single-nut shifted lead self-pretightening clearance adjusting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205145907U CN201757165U (en) | 2010-08-31 | 2010-08-31 | Ball screw assembly with single-nut shifted lead self-pretightening clearance adjusting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201757165U true CN201757165U (en) | 2011-03-09 |
Family
ID=43644437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205145907U Expired - Fee Related CN201757165U (en) | 2010-08-31 | 2010-08-31 | Ball screw assembly with single-nut shifted lead self-pretightening clearance adjusting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201757165U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122410A (en) * | 2016-08-31 | 2016-11-16 | 浙江卓求传动科技有限公司 | A kind of dislocation ball nut ball screw |
-
2010
- 2010-08-31 CN CN2010205145907U patent/CN201757165U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122410A (en) * | 2016-08-31 | 2016-11-16 | 浙江卓求传动科技有限公司 | A kind of dislocation ball nut ball screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110309 Termination date: 20130831 |