CN215984254U

CN215984254U - Micrometer capable of measuring step length of shaft part

Info

Publication number: CN215984254U
Application number: CN202122404542.3U
Authority: CN
Inventors: 李小军
Original assignee: Guilin Measuring & Cutting Tool Co ltd
Current assignee: Guilin Measuring & Cutting Tool Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-03-08
Anticipated expiration: 2031-09-30

Abstract

The utility model provides a micrometer capable of measuring the step length of an axial part, which comprises a micrometer frame, a measuring anvil and a micrometer body, wherein the measuring anvil and the micrometer body are respectively fixed on two sides of the micrometer frame, a micrometer screw rod is arranged in the micrometer body and can slide relative to the measuring anvil, a V-shaped through groove for placing a shaft neck of the part to be measured is formed in the upper end of the measuring anvil, the arrangement direction of the V-shaped through groove is parallel to the axis of the micrometer screw rod, the inner end surface of the measuring anvil is matched with the step end surface of the part to be measured for limiting, and the axis of the part to be measured is parallel to the axis of the micrometer screw rod during measurement. The utility model provides a micrometer capable of measuring the step length of a shaft part, which can overcome the problem that the step length of the shaft part is difficult to measure and simplify the step length measuring operation.

Description

Micrometer capable of measuring step length of shaft part

Technical Field

The utility model relates to the technical field of micrometers, in particular to a micrometer capable of measuring the step length of a shaft part.

Background

Micrometer, also known as micrometer screw, is a commonly used measuring tool in geometric measurement. The micrometer usually consists of a micrometer frame, a measuring anvil, a micrometer screw, a threaded shaft sleeve, a fixed sleeve, a micro-cylinder, a force measuring device and a locking device. The measuring anvil and the thread shaft sleeve are respectively fixed on two opposite sides of the ruler frame, the micrometric screw is in threaded connection with the thread shaft sleeve and can move back and forth relative to the measuring anvil, and the size of the workpiece to be measured can be obtained by measuring the distance between the measuring anvil and the measuring end of the micrometric screw.

The micrometer anvil commonly used is a transversely installed cylindrical structure, and when the step length of a T-shaped shaft and a step shaft part is measured, the central distance cannot be effectively obtained, and only the measured value can be obtained by measuring the thickness of the edge of the step. When the step with smaller width is measured, the measuring anvil cannot obtain an effective contact measuring surface. And for the measurement of multi-stage stepped parts, the whole size needs to be obtained by continuous multiple measurement and calculation, and the traditional anvil multiple measurement easily causes larger data error. And the end parts of a plurality of step parts are circular arcs or conical surfaces, the thicknesses of all points on the steps are different, and the central distance needs to be measured to be used as the effective step length. The traditional anvil cell can not be used for positioning the parts in parallel, and the center distance of the step part can not be accurately measured.

Based on the defects of the existing method, the design of the micrometer suitable for measuring the step length of the shaft part has important significance.

SUMMERY OF THE UTILITY MODEL

The utility model provides a micrometer capable of measuring the step length of a shaft part, which can overcome the problem that the step length of the shaft part is difficult to measure and simplify the step length measuring operation.

In order to achieve the technical purpose and achieve the technical effects, the utility model solves the problems through the following technical scheme:

the utility model provides a micrometer of measurable quantity axle type part step length, includes micrometer frame, survey hammering block, micrometer body, survey hammering block and micrometer body are fixed in micrometer frame both sides respectively, and the micrometer screw rod is installed and is surveyed the hammering block and slide relatively in micrometer body, survey hammering block upper end is seted up the V type that is used for placing the part axle journal that awaits measuring and is led to the groove, and V type leads to the groove and sets up the direction and is parallel with micrometer screw rod axis, and it is spacing with the cooperation of the part step terminal surface that awaits measuring in the interior terminal surface of survey hammering block, and the axis is parallel with micrometer screw rod axis when the part that awaits measuring.

Furthermore, the section of the V-shaped through groove is in an isosceles triangle shape, and the V-shaped angle is 60 ℃.

Furthermore, the perpendicularity between the inner end face of the measuring anvil and the axis of the micrometer screw rod is less than 0.01.

The utility model has the advantages and effects that:

the micrometer capable of measuring the step length of the shaft part adopts the V-shaped through groove to support the shaft neck (the small-diameter shaft section adjacent to the step to be measured) of the shaft part to be measured, the end face of the step to be measured is matched with the inner end face of the measuring anvil for limiting, the micrometer screw is adjusted to effectively contact with the front end of the part to be measured, and the readable number can obtain the accurate length of the stage.

Through the location of V type logical groove counter shaft neck, can carry out the outrigger to the part that awaits measuring to guarantee that the part axis that awaits measuring is parallel with micrometer screw rod axis, measure the central distance of the step that awaits measuring. The center distance of the step to be measured is measured, the problem of different thicknesses of all points on the step of the end part arc or conical part can be solved, and accurate measurement data can be obtained.

Drawings

FIG. 1(a) is a schematic structural view of a micrometer capable of measuring the step length of a shaft part;

FIG. 1(b) is a left side view of the structure at A in FIG. 1 (a);

FIG. 2(a) is a schematic diagram of the operation of measuring the top of a sphere using the present invention;

FIG. 2(B) is a left side view of the structure at B in FIG. 2 (a);

figure 3 is a schematic view of the operation of a measuring tip incorporating the present invention;

fig. 4 is a schematic diagram of the operation of measuring the stepped shaft by using the present invention.

And (3) identifying the figure number:

1. the micrometer comprises a micrometer frame, 2 a measuring anvil, 21 a V-shaped through groove, 3 a micrometer body, 31 a micrometer screw, 4 a part to be measured.

Detailed Description

The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. The specific embodiments described herein are merely illustrative of the utility model and are not intended to be limiting.

The micrometer of measurable quantity axle type part step length described in this embodiment, as shown in fig. 1(a), (b), the main part includes micrometer frame 1, survey anvil 2, micrometer body 3, survey anvil 2 and micrometer body 3 are fixed in micrometer frame 1 both sides respectively, survey micrometer 31 screw thread install in micrometer body 3 can be relative survey anvil 2 and slide back and forth.

In the embodiment, the body of the anvil 2 is a rectangular anvil fixed at one end of the ruler frame 1, a transverse V-shaped through groove 21 is formed at the top end of the anvil, and the direction of the groove hole is the same as the moving direction of the micrometer screw 31. The inner end face of the measuring anvil 2 is a positioning face for limiting the end face of the step, and the perpendicularity between the positioning face and the axis of the micrometer screw 31 is less than 0.01, so that the measuring precision of the micrometer is ensured. The cross-section of the V-shaped through groove 21 is an isosceles triangle, and the setting direction of the V-shaped through groove 21 is parallel to the axis of the micrometer screw.

During measurement, the shaft neck of the part 4 to be measured is transversely placed in the V-shaped through groove 21, the inner end face of the measuring anvil 2 is matched with the end face of the step to be measured for limiting, and the axis of the part 4 to be measured is superposed with the axis of the micrometer screw 31.

As shown in fig. 2(a) and (b), the part 4 to be measured is a top end of a ball, the top end of the ball is transversely placed in the V-shaped through groove 21, a shaft neck of the ball is supported and matched with triangular edges at two sides of the V-shaped through groove 21, and a step end surface at the inner side of the ball head is in contact positioning with a positioning surface at the inner end of the V-shaped through groove 21. The micrometer screw 31 is adjusted to abut against the head end of the part to be measured 4, and the micrometer reads the length of the ball head at the top end of the sphere.

As shown in the attached drawing 3, the part 4 to be measured is a tip, the tip is transversely placed in the V-shaped through groove 21, the shaft neck of the tip is in supporting fit with the triangular edges at the two sides of the V-shaped through groove 21, and the step end surface at the inner side of the tip is in contact positioning with the positioning surface at the inner end of the V-shaped through groove 21. The tip of the tip abuts against the micrometer adjusting screw 31, and the micrometer reads the length of the tip head.

As shown in fig. 4, the part 4 to be measured is a stepped shaft, the stepped shaft is transversely placed in the V-shaped through groove 21, a shaft neck of the stepped shaft is supported and matched with triangular edges at two sides of the V-shaped through groove 21, and a shaft shoulder is in contact positioning with a positioning surface at the inner end of the V-shaped through groove 21. The micrometer screw 31 is adjusted to make the end of the stepped shaft abut against, and the micrometer reads the length of the measured section of the stepped shaft.

The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. Many changes, modifications, substitutions and alterations to these embodiments are within the scope of the present invention without departing from the principles and spirit of the utility model.

Claims

1. The utility model provides a micrometer of measurable quantity axle type part step length, includes micrometer frame (1), survey anvil (2), micrometer body (3), survey anvil (2) and micrometer body (3) and be fixed in micrometer frame (1) both sides respectively, but micrometer screw rod (31) install in micrometer body (3) relatively survey anvil (2) and slide its characterized in that:

the upper end of the measuring anvil (2) is provided with a V-shaped through groove (21) for placing a shaft neck of the part to be measured (4), the setting direction of the V-shaped through groove (21) is parallel to the axis of the micrometric screw (31), the inner end face of the measuring anvil (2) is matched with the step end face of the part to be measured (4) for limiting, and the axis of the part to be measured (4) is parallel to the axis of the micrometric screw (31) during measurement.

2. The micrometer capable of measuring the step length of the shaft part as claimed in claim 1, wherein: the section of the V-shaped through groove (21) is isosceles triangle, and the V-shaped angle is 60 degrees.

3. The micrometer capable of measuring the step length of the shaft part as claimed in claim 1, wherein: the perpendicularity between the inner end face of the measuring anvil (2) and the axis of the micrometer screw (31) is less than 0.01.