CN214946161U

CN214946161U - Micrometer anti-backlash structure

Info

Publication number: CN214946161U
Application number: CN202120538191.2U
Authority: CN
Inventors: 邬玉飞; 张永明
Original assignee: Jinjiang Measuring Tools Co ltd
Current assignee: Jinjiang Measuring Tools Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-11-30
Anticipated expiration: 2031-03-15

Abstract

The utility model discloses a micrometer clearance structure that disappears, including lead screw, axle sleeve and the uide bushing of from inside to outside coaxial setting, lead screw and axle sleeve screw-thread fit, uide bushing and axle sleeve hole axle cooperation, the end fixedly connected with flange of lead screw, flange and uide bushing keyway cooperation set up the lug on the flange, and the square groove is seted up to the uide bushing inner wall, lug and square groove cooperation set up the torsional spring between flange and uide bushing to eliminate the clearance between uide bushing and the lead screw. Through spring torsion, let the flange lug remove at square groove wainscot promptly, eliminate fit clearance, make micrometer's mechanism compacter, measurement accuracy is higher.

Description

Micrometer anti-backlash structure

Technical Field

The utility model belongs to the technical field of the measurement utensil technique and specifically relates to a micrometer crack structure that disappears.

Background

Micrometer is also called as micrometer screw, micrometer screw and micrometer, and is a more precise length measuring tool than vernier caliper, and its length can be accurately measured to 0.01mm, and its measuring range is several tens of cm. The screw rod part of the electronic dividing plate is processed into threads with the thread pitch of 0.5mm, when the guide sleeve drives the electronic dividing plate to rotate in the threaded sleeve, the electronic dividing plate can move forward or backward, and the electronic dividing plate is divided into 50 divisions equally. The whole circle number of the screw rod rotation is measured by an electronic dividing disc, and the final measurement value is directly displayed on a screen. When the screw rod rotates in the threaded sleeve of the fixed sleeve, a meshing gap exists between the screw rod and the guide sleeve, so that the gap of a micro rotation angle of the electronic dividing plate can be influenced, and the measurement precision of the micrometer is influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the clearance that prior art exists above is overcome, provides a micrometer gap structure that disappears to eliminate the clearance between uide bushing and the lead screw.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a micrometer crack structure that disappears, includes lead screw, axle sleeve and the uide bushing of from inside to outside coaxial setting, lead screw and axle sleeve screw-thread fit, uide bushing and axle sleeve hole axle cooperation, the end fixedly connected with flange of lead screw, flange and uide bushing keyway cooperation, set up the lug on the flange, the square groove is seted up to the uide bushing inner wall, lug and square groove cooperation set up the torsional spring between flange and uide bushing to eliminate uide bushing and the produced running clearance of lead screw when rotatory around the center pin.

Furthermore, the shaft sleeve is provided with an annular limiting groove for axially limiting the guide sleeve.

Furthermore, the flange and the screw rod are fixedly bonded into a whole through glue.

Furthermore, the end of the screw rod is provided with a step, and the flange is fixedly connected to the step.

Furthermore, two steps are arranged on the flange, a clamping groove is formed between the two steps, and the torsion spring is clamped and wound in the clamping groove.

Furthermore, one end of the torsion spring is fixed on the flange, and the other end of the torsion spring is clamped on the inner side of the square groove of the guide sleeve.

The beneficial effects of the utility model are that, the utility model discloses a clearance structure disappears to micrometer, when the lug of flange stretched into the square groove of uide bushing, rotary motion was done to the uide bushing, drove the flange, and the flange drives the lead screw and sheathes axial displacement at the screw thread axle, passes through spring torsion this moment, lets the flange lug remove at square groove interior wainscot promptly, eliminates the fit clearance, makes micrometer's mechanism compacter, and measurement accuracy is higher.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic sectional structure of the present invention;

fig. 3 is a schematic structural view of an end of the screw rod of the present invention;

in the figure, 1, a shaft sleeve, 2, a guide sleeve, 3, a screw rod, 4, a torsion spring, 5, a flange, 6, a bump, 7, a square groove, 8, a limiting groove, 9, a step and 10 are arranged.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

The micrometer clearance eliminating structure shown in fig. 1-3 comprises a lead screw 3, a shaft sleeve 1 and a guide sleeve 2 which are coaxially arranged from inside to outside, wherein the lead screw 3 is in threaded fit with the shaft sleeve 1, the guide sleeve 2 is in shaft fit with a hole of the shaft sleeve 1, a flange 5 is fixedly connected to the end of the lead screw 3, the flange 5 is in key groove fit with the guide sleeve 2, a convex block 6 is arranged on the flange 5, a square groove 7 is formed in the inner wall of the guide sleeve 2, the convex block 6 is in fit with the square groove 7, and a torsion spring 4 is arranged between the flange 5 and the guide sleeve 2 so as to eliminate a rotating clearance generated when the guide sleeve 2 and the lead screw 3 rotate around a central shaft.

The shaft sleeve 1 is provided with an annular limiting groove 8 for axially limiting the guide sleeve 2.

The flange 5 and the screw rod 3 are fixedly bonded into a whole through glue.

The end of the screw rod 3 is provided with a step 9, and the flange 5 is fixedly connected to the step 9.

Two steps are arranged on the flange 5, a clamping groove 10 is formed between the two steps, and the torsion spring 4 is clamped and wound in the clamping groove 10.

One end of the torsion spring 4 is fixed on the flange 5, and the other end is clamped at the inner side of the square groove 7 of the guide sleeve 2.

The utility model discloses a clearance structure disappears to micrometer, when lug 6 of flange 5 stretched into the square groove 7 of uide bushing 2 in, rotary motion was done to uide bushing 2, drove flange 5, and flange 5 drives lead screw 3 axial displacement on axle sleeve 1, passes through spring torsion this moment, lets the flange lug remove at the 7 interior facings of square groove promptly, eliminates the fit clearance, makes the mechanism of micrometer compacter, and measurement accuracy is higher.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A micrometer anti-backlash structure is characterized in that: including lead screw (3), axle sleeve (1) and uide bushing (2) of from inside to outside coaxial setting, lead screw (3) and axle sleeve (1) screw-thread fit, uide bushing (2) and axle sleeve (1) hole axle cooperation, the end fixedly connected with flange (5) of lead screw (3), flange (5) and uide bushing (2) keyway cooperation set up lug (6) on flange (5), uide bushing (2) inner wall is seted up square groove (7), lug (6) and square groove (7) cooperation set up torsional spring (4) between flange (5) and uide bushing (2) to eliminate uide bushing (2) and lead screw (3) and the turned clearance that produces when rotatory around the center pin.

2. The micrometer clearance structure according to claim 1, wherein: the shaft sleeve (1) is provided with an annular limiting groove (8) for axially limiting the guide sleeve (2).

3. The micrometer clearance structure according to claim 1, wherein: the flange (5) and the screw rod (3) are fixedly bonded into a whole through glue.

4. The micrometer clearance structure according to claim 1, wherein: the end of the screw rod (3) is provided with a step (9), and the flange (5) is fixedly connected to the step (9).

5. The micrometer clearance structure according to claim 1, wherein: the flange (5) is provided with two steps, a clamping groove (10) is formed between the two steps, and the torsion spring (4) is clamped in the clamping groove (10).

6. The micrometer clearance structure according to claim 1, wherein: one end of the torsion spring (4) is fixed on the flange (5), and the other end is clamped on the inner side of the square groove (7) of the guide sleeve (2).