CN218882919U

CN218882919U - Return channel structure of ball screw

Info

Publication number: CN218882919U
Application number: CN202223004229.1U
Authority: CN
Inventors: 林威廷
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-04-18
Anticipated expiration: 2032-11-11

Abstract

A kind of return channel structure of the ball screw, this ball screw includes: the screw rod, a nut, two circulators, a plurality of balls and a return pipe, wherein, the pole body of screw rod is equipped with the helicla flute, the nut both ends respectively combine one the circulator, and the perforation inner wall at this nut central authorities is equipped with the first roll groove of heliciform, the perforation outside is equipped with and runs through the return channel at nut both ends, the inner tube portion protrusion of return pipe is equipped with several spiricles, and this spiricle does the setting with the odd number that can't be got rid of in order when the return pipe is worn to establish in the return channel, just make pass through the return channel is that the circulation was done the ball can be when passing through this return pipe by the spiricle drives and produces the side direction upset of a specific angle.

Description

Return channel structure of ball screw

Technical Field

The utility model relates to a ball screw's backward flow is said structure, especially relates to a long service life, and can the ball screw's of noise prevention or abnormal sound production backward flow is said structure.

Background

As shown in fig. 7, the conventional ball screw 60 includes: a screw 61, a nut 62, two circulators 63 and a plurality of balls 64, wherein, the body of the screw 61 is provided with a spiral groove 611, two ends of the nut 62 are respectively combined with one circulator 63, the inner wall of the through hole in the center of the nut 62 is provided with a spiral first rolling groove 621, the outer side of the through hole is provided with a return channel 622 penetrating through two ends of the nut 62, the second rolling groove 631 on the circulator 63 is utilized to connect the first rolling groove 621 with the return channel 622, so that the balls 64 installed between the spiral groove 611 and the first rolling groove 621 can smoothly perform circulation operation on the ball screw 60.

However, the conventional structure as described above still has the following problems in practical applications: when the ball screw 60 is operated, the balls 64 are pushed forward one by one along the operation direction, and cannot be laterally turned over under the influence of the return channel 622 in the no-load process of the return flow, so that the balls 64 are gradually worn into an elliptical shape (as shown in fig. 8) because the load is concentrated at the same point, thereby seriously damaging the stability of the operation, greatly shortening the service life and generating disturbing noise.

Therefore, the inventor of the present invention has thought of the idea of the creation based on the objective of the related industry, which is to design the ball screw with years of experience, and the inventor of the present invention has developed the ball screw through many studies and trials of sample tests and many modifications.

SUMMERY OF THE UTILITY MODEL

The technical problems to be solved are as follows:

the conventional ball screw is not durable and can generate disturbing noise during operation, which is a technical problem to be solved.

The technical characteristics of solving the problems are as follows:

the utility model provides a ball screw's backward flow way structure, this ball screw include: the ball screw comprises a screw rod, a screw cap, two circulators, a plurality of balls and a backflow pipe, wherein a screw groove is arranged on a rod body of the screw rod, the circulators are respectively combined at two ends of the screw cap, a spiral first rolling groove is arranged on the inner wall of a through hole in the center of the screw cap, a backflow passage penetrating through two ends of the screw cap is arranged outside the through hole, a second rolling groove on the circulator is used for connecting the first rolling groove and the backflow passage, so that the balls arranged between the screw groove and the first rolling groove can smoothly circulate on the ball screw rod when the screw cap is sleeved on the screw rod, a plurality of spiral grains are protruded on the inner pipe part of the backflow pipe, the spiral grains are arranged in odd number which cannot be completely removed, and when the balls circulating through the backflow passage penetrate through the backflow passage, the balls can be driven by the spiral grains to generate lateral overturning of a specific angle when passing through the backflow passage, thereby obtaining the backflow passage structure of the ball screw rod.

Efficacy against the prior art:

the utility model provides a ball screw's backward flow way structure works as the ball is in the operation during the no load state of back flow, the ball will receive the drive of spiral line, guide initiative produce the side direction upset of specific angle, let the ball flow back to the helicla flute with when bearing the load, can not be again with specific site (single-point) atress always, in order to avoid the ball takes place deformation from frequent atress department, in order effectively to prolong ball screw's life also can avoid ball screw sends the noise of disturbing one's life when the function, and utilizes the spiral line is with the design that can't be got rid of to the normal position again after the upset of ball side direction, or does according to the preface endless repeated atress with specific upper and lower two points or upper and lower, left and right four points.

Drawings

Fig. 1 is a perspective combination view of the present invention.

Fig. 2 is an exploded perspective view of the present invention.

Fig. 3 is a cross-sectional view of the return pipe of the present invention.

Fig. 4 is a diagram illustrating the operation state of the ball screw according to the present invention.

Fig. 5 is a state diagram of the circulation of the balls on the ball screw according to the present invention.

Fig. 6 is a schematic diagram of the lateral turning of the balls (only one ball is shown) in the return tube by the spiral thread.

Fig. 7 is a conventional configuration diagram.

Fig. 8 is a diagram showing a state in which a conventional ball is deformed.

Description of the symbols:

the utility model discloses the part:

screw-10 spiral groove-11

Nut-20 through-hole-21

First rolling groove-22 return channel-23

Circulator-30 second rolling groove-31

Ball-40

Return pipe-50 helical veins-51

The existing part is as follows:

ball screw-60 screw-61

Spiral groove 611 nut 62

First rolling groove-621 return channel-622

Circulator-63 second rolling groove-631

Ball bearing- -64

Detailed Description

For further understanding and appreciation of the objects, features, and functions of the present invention, reference will now be made to the following examples (illustrated in the accompanying drawings) in which:

first, as shown in fig. 1 to 5, the ball screw includes: a screw 10, a nut 20, two circulators 30, a plurality of balls 40 and a return pipe 50, wherein the screw 10 has a spiral groove 11 on the shaft, the circulators 30 are respectively combined on two ends of the nut 20, a spiral first rolling groove 22 is arranged on the inner wall of a through hole 21 in the center of the nut 20, a return channel 23 is arranged on the outer side of the through hole 21 and penetrates through two ends of the nut 20, the first rolling groove 22 and the return channel 23 are connected by a second rolling groove 31 on the circulator 30, so that the balls 40 installed between the spiral groove 11 and the first rolling groove 22 can smoothly circulate on the ball screw when the nut 20 is sleeved on the screw 10, a plurality of spiral threads 51 are projected on the inner pipe of the return pipe 50, the spiral threads 51 are arranged in odd number which cannot be completely removed, and when the return pipe 50 is inserted in the return channel 23, the return pipe 40 circulating through the return channel 23 can be driven by the spiral threads 51 to generate a specific angle (fig. 6).

The utility model provides a ball screw's return channel structure, wherein, back flow 50 is wear-resisting plastic tubing.

The utility model provides a ball screw's return channel structure, wherein, be equipped with three in the inner tube portion of return pipe 50 the spiral line 51.

The utility model provides a ball screw's return channel structure, wherein, be equipped with five in the inner tubular part of return pipe 50 the spiral line 51.

The utility model provides a ball screw's return channel structure, wherein, be equipped with seven in the inner tube portion of return pipe 50 the spiral line 51.

With the above structure, when the ball 40 is in the unloaded state of the return pipe 50, the ball 40 is driven by the spiral thread 51 to guide and actively generate a lateral overturn of a specific angle (please also refer to fig. 6), so that when the ball 40 returns to the space between the spiral groove 11 and the first rolling groove 22 and bears a load, the ball 40 is not always stressed at a specific position (single point), thereby preventing the ball 40 from deforming from a frequently stressed position, effectively prolonging the service life of the ball screw, and preventing the ball screw from generating disturbing noise during operation, and by using the design that the spiral thread 51 is provided with an odd number which cannot be eliminated, the ball 40 can be prevented from returning to the original position after being laterally overturned, or performing a repeated stress of sequential circulation at a specific upper point, a specific lower point, or at a specific upper point, a specific lower point, a specific left point and a specific right point.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention; therefore, the equivalent changes and modifications made according to the claims of the present invention should be covered by the scope of the present invention.

Claims

1. The utility model provides a return channel structure of ball screw which characterized in that, this ball screw contains: a screw rod, a nut, two circulators, a plurality of balls and a return pipe, wherein:

a spiral groove is formed in the rod body of the screw rod;

the two ends of the screw cap are respectively combined with the circulators, the inner wall of a through hole in the center of the screw cap is provided with a spiral first rolling groove, the outer side of the through hole is provided with a return channel penetrating through the two ends of the screw cap, and the first rolling groove and the return channel are connected by utilizing a second rolling groove on the circulators, so that the balls arranged between the spiral groove and the first rolling groove can smoothly circulate on the ball screw when the screw cap sleeve is arranged on the screw;

the return pipe is a wear-resistant plastic pipe, three helical lines are protruded at the inner pipe part of the return pipe, and when the return pipe is arranged in the return passage in a penetrating mode, the balls which run circularly through the return passage can be driven by the helical lines to turn laterally when passing through the return pipe.