CN218913624U - Ball screw pair capable of automatically compensating abrasion gap - Google Patents
Ball screw pair capable of automatically compensating abrasion gap Download PDFInfo
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- CN218913624U CN218913624U CN202222984266.7U CN202222984266U CN218913624U CN 218913624 U CN218913624 U CN 218913624U CN 202222984266 U CN202222984266 U CN 202222984266U CN 218913624 U CN218913624 U CN 218913624U
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Abstract
The utility model relates to an automatic compensation wear clearance ball screw pair, which comprises a ball screw and a ball nut, wherein the ball screw and the ball nut are in screw matching through steel balls, matched ball screw raceways are arranged on the ball screw and the ball nut, the ball nut comprises a mounting flange, a first nut, a second nut and a connecting assembly used for connecting the first nut and the second nut, a gasket is further arranged between the first nut and the second nut, a clearance eliminating assembly is arranged on the gasket, the clearance eliminating assembly comprises a groove formed in one side of the gasket, an adjusting spring is arranged in the groove, and the elasticity of the adjusting spring can act on the gasket in real time to achieve the effect of automatically eliminating the clearance, so that the ball screw pair is prevented from being reduced in precision after long-time use, and the service life of the ball screw pair is prolonged.
Description
Technical Field
The utility model belongs to the technical field of ball screws, and relates to a ball screw pair capable of automatically compensating a wear clearance.
Background
The ball screw pair is a main transmission mechanism in modern mechanical equipment, and the performance of the ball screw pair directly influences the motion precision of the moving parts of the mechanical equipment. The existing pre-tightening ball screw nuts are generally of a double-nut structure, wherein most of the pre-tightening ball screw nuts adopt a washer pre-tightening mode and are then connected by a flat key, so that pre-tightening between the nut of the ball screw pair and the screw is realized.
However, after long-time use, the steel ball and the roller path are easy to wear, after wear, gaps are generated among the ball screw byproducts, the pretightening force is reduced, the gasket is loosened, and the pretightening effect cannot be started, so that the use accuracy of the ball nut is affected.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a ball screw pair capable of automatically compensating a wear clearance.
The aim of the utility model can be achieved by the following technical scheme: the utility model provides a but self compensating wearing and tearing clearance ball screw pair, includes ball screw and ball nut that carries out spiral matching through the steel ball, ball screw and ball nut on all be equipped with assorted ball thread raceway, ball nut include mounting flange, first nut, second nut and be used for connecting the coupling assembling of first nut and second nut, first nut and second nut between still be provided with the packing ring, the packing ring on be provided with clearance elimination subassembly, clearance elimination subassembly including seting up the recess in packing ring one side, the recess in be provided with adjusting spring.
In the ball screw pair capable of automatically compensating the abrasion gap, the ball nut is provided with the horizontal circulating channel, the reverser is provided with the circulating motion channel I and the circulating motion channel II which are respectively connected with the ball thread roller way and the horizontal circulating channel, the circulating motion channel I is tangentially connected with the ball nut thread roller way in the circumferential direction, and the circulating motion channel II is meshed with the wall hole of the ball nut.
In the ball screw pair capable of automatically compensating the abrasion gap, sealing elements are arranged at two ends of the ball nut. The sealing element is a sealing ring, the sealing ring is designed into a stepped cylinder shape, a small excircle of the sealing ring is arranged in an inner hole at the end part of the ball nut in a proper clearance, the sealing ring is radially fixed by a screw, and a large excircle of the sealing ring is covered on the end surface of the ball nut to play a role in sealing the outer layer.
In the ball screw pair capable of automatically compensating the abrasion gap, the connecting assembly comprises a connecting piece arranged between the first nut and the second nut, and two ends of the connecting piece are fixedly arranged on the first nut and the second nut through bolts respectively. The connecting piece is a flat key and is used for connecting the first nut and the second nut with each other.
In the ball screw pair capable of automatically compensating the abrasion clearance, the clearance eliminating assemblies are arranged in a plurality and annularly distributed on the gasket.
In the ball screw pair capable of automatically compensating the abrasion gap, the first nut, the washer and the second nut are provided with the inter-groove for accommodating the connecting piece.
In the ball screw pair capable of automatically compensating the abrasion gap, the adjusting spring is arranged on one side close to the mounting flange.
Compared with the prior art, the ball nut is provided with the adjusting spring, the adjusting spring is in a compression state when being arranged in the groove, two ends of the adjusting spring respectively have compression force on the first nut and the gasket, after the ball nut is used for a long time, the ball and the rollaway nest are worn to a certain extent, so that the pretightening force is reduced, the gasket is loose, the pretightening effect cannot be achieved, the precision of the ball screw pair is deteriorated, and at the moment, the adjusting spring can act on the gasket through elasticity, so that the gasket can be always pressed against the ball nut with a certain pressure, the looseness of the gasket is avoided, and the purposes of eliminating axial gaps and pretightening are achieved; and meanwhile, the elastic force of the adjusting spring acts on the gasket in real time, so that the effect of automatically eliminating a gap is achieved, the precision of the ball screw pair is prevented from being reduced after the ball screw pair is used for a long time, and the service life of the ball screw pair is prolonged.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the connection structure of the reverser and the ball screw race of the present utility model;
FIG. 3 is a schematic view of the ball nut of the present utility model;
fig. 4 is an exploded view of the ball nut of the present utility model.
In the figure, 1, a ball screw; 2. a steel ball; 3. a ball nut; 31. a mounting flange; 32. a first nut; 33. a second nut; 4. a connection assembly; 41. a connecting piece; 5. a gap elimination assembly; 51. a groove; 52. an adjusting spring; 6. ball screw thread roller path; 7. a space groove; 8. a horizontal circulation channel; 9. a reverser; 10. a seal; 11. a circulating motion channel I; 12. a circulating motion channel II; 13. and a gasket.
Detailed Description
The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
Examples
As shown in fig. 1 to 3, an automatic compensation wear clearance ball screw pair comprises a ball screw 1 and a ball nut 3 which are in spiral matching through a steel ball 2, wherein matched ball screw thread raceways 6 are arranged on the ball screw 1 and the ball nut 3, a horizontal circulation channel 8 is arranged on the ball nut 3, a circulation movement channel I11 and a circulation movement channel II 12 which are respectively connected with the ball screw thread raceways 6 and the horizontal circulation channel 8 are arranged on a reverser 9, the circulation movement channel I11 is tangentially connected with the ball nut 3 thread raceways in the circumferential direction, and the circulation movement channel II 12 is in anastomotic joint with a wall hole of the ball nut 3.
The ball nut 3 comprises a mounting flange 31, a first nut 32, a second nut 33 and a connecting component 4 for connecting the first nut 32 and the second nut 33, the connecting component 4 comprises a connecting piece 41 arranged between the first nut 32 and the second nut 33, and two ends of the connecting piece 41 are fixedly arranged on the first nut 32 and the second nut 33 respectively through bolts. The connector 41 is a flat key and is capable of connecting the first nut 32 and the second nut 33 to each other.
The first nut 32, the washer 13 and the second nut 33 are provided with a space 7 for accommodating the connecting member 41.
A gasket 13 is further arranged between the first nut 32 and the second nut 33, a gap eliminating assembly 5 is arranged on the gasket 13, and a plurality of gap eliminating assemblies 5 are arranged and distributed on the gasket 13 in a ring shape.
The gap eliminating assembly 5 includes a groove 51 formed on one side of the washer 13, and an adjusting spring 52 is disposed in the groove 51, and in this embodiment, the adjusting spring 52 is disposed on a side close to the mounting flange 31.
The ball nut 3 is provided with seals 10 at both ends. The sealing element 10 is a sealing ring, the sealing ring is designed into a stepped cylinder shape, a small excircle of the sealing ring is arranged in an inner hole at the end part of the ball nut 3 in a proper clearance, the sealing ring is radially fixed by a screw, and a large excircle of the sealing ring is covered on the end surface of the ball nut 3 to play a role in sealing an outer layer.
According to the utility model, the adjusting spring 52 is arranged, the adjusting spring 52 is in a compressed state when being arranged in the groove 51, two ends of the adjusting spring 52 respectively have compression force on the first nut 32 and the gasket 13, when the ball nut 3 is used for a long time, after the ball nut 2 and the rollaway nest are worn to a certain extent, the pretightening force is reduced, the gasket 13 is loosened and cannot play a pretightening role, the precision of the ball screw pair is deteriorated, and at the moment, the adjusting spring 52 can act on the gasket 13 through elasticity, so that the gasket 13 can be always pressed against the ball nut 3 with a certain pressure, the looseness of the gasket 13 is avoided, and the purposes of eliminating axial gaps and pretightening are achieved; and meanwhile, the elastic force of the adjusting spring 52 acts on the gasket 13 in real time, so that the effect of automatically eliminating a gap is achieved, the precision of the ball screw 1 pair is prevented from being reduced after the ball screw 1 pair is used for a long time, and the service life of the ball screw 1 pair is prolonged.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (6)
1. The utility model provides a but self compensating wearing and tearing clearance ball screw pair, its characterized in that, including ball screw (1) and ball nut (3) that carry out the spiral through steel ball (2), ball screw (1) and ball nut (3) on all be equipped with assorted ball screw raceway (6), ball nut (3) include mounting flange (31), first nut (32), second nut (33) and be used for connecting coupling assembling (4) of first nut (32) and second nut (33), first nut (32) and second nut (33) between still be provided with packing ring (13), packing ring (13) on be provided with clearance elimination subassembly (5), clearance elimination subassembly (5) including seting up recess (51) in packing ring (13) one side, recess (51) in be provided with adjusting spring (52).
2. The self-compensating wear clearance ball screw assembly of claim 1, wherein: and sealing elements (10) are arranged at two ends of the ball nut (3).
3. The self-compensating wear clearance ball screw assembly of claim 2, wherein: the connecting assembly (4) comprises a connecting piece (41) arranged between the first nut (32) and the second nut (33), two ends of the connecting piece (41) are fixedly arranged on the first nut (32) and the second nut (33) through bolts respectively, the connecting piece (41) is a flat key, relative rotation between the first nut (32) and the second nut (33) can be prevented, and meanwhile the connecting piece (41) is arranged on the gasket (13) and can prevent the gasket (13) from falling out of the two nuts.
4. The self-compensating wear clearance ball screw assembly of claim 1, wherein: the clearance eliminating assembly (5) is provided with a plurality of gaskets (13) which are distributed in a ring shape.
5. The self-compensating wear clearance ball screw assembly of claim 1, wherein: the first nut (32), the gasket (13) and the second nut (33) are provided with a space groove (7) for accommodating the connecting piece (41).
6. The self-compensating wear clearance ball screw assembly of claim 1, wherein: the adjusting spring (52) is arranged on one side close to the mounting flange (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222984266.7U CN218913624U (en) | 2022-11-09 | 2022-11-09 | Ball screw pair capable of automatically compensating abrasion gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222984266.7U CN218913624U (en) | 2022-11-09 | 2022-11-09 | Ball screw pair capable of automatically compensating abrasion gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218913624U true CN218913624U (en) | 2023-04-25 |
Family
ID=86012643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222984266.7U Active CN218913624U (en) | 2022-11-09 | 2022-11-09 | Ball screw pair capable of automatically compensating abrasion gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218913624U (en) |
-
2022
- 2022-11-09 CN CN202222984266.7U patent/CN218913624U/en active Active
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