Measuring instrument for plane runout of cylinder end face

Abstract

The utility model relates to the technical field of run-out degree measurement, in particular to a measuring instrument for plane run-out of a cylinder end face, which comprises a measuring tool body, a central hole arranged at the center of the measuring tool body, a centering cone arranged below the central hole, a measuring meter arranged in a positioning hole, and guide rails arranged at the middle lower part of the side wall of the measuring tool body in bilateral symmetry. By inserting the measuring meter into different positioning holes, different positions of the measuring meter on the clamp body can be adjusted, and the end face run-out of the cylinder within a certain range can be measured at the same time, so that the cost is saved, the calibration time is shortened, the operation difficulty is reduced, the working efficiency is improved, and popularization in factories is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of runout measurement, in particular to a measuring instrument for the flat runout of a cylindrical end face. Background Technique

[0002] In the field of machining, the measurement of the flat runout of a cylindrical end face is crucial for ensuring the geometric accuracy and functionality of parts. Due to its simple detection method and comprehensive control effect, runout tolerance is widely used in design and production, especially in the comprehensive error control of rotating parts. If the runout error exceeds the tolerance zone, it will directly affect the assembly quality of the product and the operating performance of the machine.

[0003] Traditional methods for measuring the circular runout of an end face usually use basic measuring tools such as dial indicators, gauge blocks, gauge stands, and V-blocks. During the measurement process, the part to be measured is placed on the V-block, and the end face runout error is read through a dial indicator and compared with the tolerance value specified in the drawing. The measurement method is traditional and single, and time-consuming. With the development of technology, the measurement method of the flat runout of a cylindrical end face has evolved from traditional manual measurement to an automated measurement method that combines a data acquisition instrument with a dial indicator, which reads and processes measurement data in an automated manner, reduces human reading errors, and improves the efficiency and accuracy of measurement. However, the measurement cost of this method is relatively high. To comprehensively consider measurement cost, efficiency, and convenience, a general measurement device that can adapt to different specifications of cylindrical cross-sections and outer cylindrical surfaces is needed. Summary of the Invention

[0004] The purpose of the utility model is to provide a measuring instrument for the flat runout of a cylindrical end face to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A measuring instrument for the flat runout of a cylindrical end face, comprising:

[0007] A measuring tool body, a central hole is provided in the middle of the measuring tool body, and a centering cone is arranged below the central hole by setting a screw in the central hole;

[0008] Positioning holes are provided at both ends of the central hole, a measuring gauge is movably inserted into the positioning holes, and the measuring gauge is fixed by rotating a tightening screw provided on the side wall of the positioning hole;

[0009] On the middle and lower parts of the side wall of the measuring tool body, there are symmetrically arranged guide rails on the left and right. On both sides of the centering cone, there are sliders. The centering cone is used to insert into the inner hole of the workpiece to be measured, and the sliders are moved along the guide rails, so that the bottom surfaces of the sliders are in contact with the workpiece to be measured. After inserting the measuring gauge into the positioning hole to contact and fix the workpiece to be measured, the measuring tool body is rotated around the central hole to complete the measurement.

[0010] Preferably, handles for convenient holding are further provided at both ends of the measuring tool body.

[0011] Preferably, the positioning holes are arranged along the length direction of the measuring tool body, and 4 - 8 positioning holes are provided.

[0012] Preferably, the distances from the positioning holes on the same side of the central hole to the central hole are distributed in an arithmetic progression.

[0013] Preferably, limit blocks are provided at both ends of the guide rails to prevent the sliders from disengaging from the guide rails.

[0014] Preferably, the limit blocks are connected to the measuring tool body by fixing screws.

[0015] Preferably, the sliders are installed on the guide rails through claw hooks.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] The present utility model includes a measuring tool body. A central hole is provided in the middle of the measuring tool body. A centering cone is provided below the central hole. A measuring gauge is arranged in the positioning hole. On the middle and lower parts of the side wall of the measuring tool body, there are symmetrically arranged guide rails on the left and right. Sliders are installed on the guide rails. By inserting the measuring gauge into different positioning holes, the different positions of the measuring gauge on the fixture body can be adjusted, and the end face runout of cylinders within a certain range can be measured simultaneously, thereby saving costs, reducing calibration time, lowering operation difficulty, and improving work efficiency, which is conducive to popularization in factories. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the workpiece to be measured of the present utility model;

[0020] Figure 3 is a state diagram of the present utility model when measuring the workpiece to be measured.

[0021] In the figure: 1. Handle; 2. Measuring tool body; 3. Measuring gauge; 4. Positioning hole; 5. Tightening screw; 6. Central hole; 7. Centering cone; 8. Workpiece to be measured; 9. Inner hole; 10. Slide block; 11. Guide rail; 12. Limit block; 13. Fixing screw. Detailed implementation manner

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 to 3 , the present invention provides a technical solution:

[0024] A measuring instrument for the flat runout of the cylindrical end face, comprising:

[0025] The measuring tool body 2 has a central hole 6 opened at the center. The central hole 6 is a counterbored through hole. A centering cone 7 is arranged below the central hole 6. By inserting a screw passing through the central hole 6 into the centering cone 7, the centering cone 7 is fixed below the measuring tool body 2, connecting the centering cone 7 and the measuring tool body 2 into one body. The centering cone 7 is frustum-shaped, and the centering cone 7 is connected to the measuring tool body 2 through the bottom surface with a larger diameter. A series of specification sizes can be set for the centering cone 7 to adapt to the inner holes 9 of different specifications of workpieces to be measured.

[0026] Positioning holes 4 for installing the measuring gauge 3 are opened at both ends of the central hole 6. The positioning holes 4 are arranged along the length direction of the measuring tool body 2. 4 - 8 positioning holes 4 can be provided on the measuring tool body 2. The positioning holes 4 are evenly distributed on both sides of the central hole 6. The distances from the positioning holes 4 on the same side to the central hole 6 are distributed in an arithmetic progression. The positioning holes 4 are through holes, and the positioning holes 4 are matched with the shaft rod of the measuring gauge 3, so that the measuring gauge 3 can be movably inserted into the positioning holes 4. The measuring gauge 3 is a dial indicator or a micrometer. A tightening screw 5 is inserted on the side wall of the positioning hole 4. After the measuring gauge 3 is inserted to a suitable position, the measuring gauge 3 is fixed on the measuring tool body 2 by rotating the tightening screw 5.

[0027] On the middle and lower part of the side wall of the measuring tool body 2 along the length direction, there are symmetrically arranged guide rails 11 on the left and right. There are two sliders 10 installed on the guide rails 11. One slider 10 is arranged on each side of the centering cone 7. There is an elastic claw on the upper side of the slider 10, which can firmly fix the slider 10 on the guide rail 11 to ensure that the slider 10 will not slide by itself during measurement. The distances of the two sliders 10 from the central hole 6 can be adjusted according to different measurement occasions and objects.

[0028] To prevent the sliders 10 from falling off when moving the sliders 10, there is a limit block 12 arranged on each side of the measuring tool body 2, and the limit block 12 is connected to the measuring tool body 2 through a fixing screw 13.

[0029] There is a handle 1 arranged on each side of the left and right of the measuring tool body 2 for convenient grasping and use.

[0030] Working principle: When in use, place the centering cone 7 of the measuring instrument into the inner hole 9 of the workpiece 7 to be measured. Relying on the gravity of the measuring tool body 2 itself can ensure the cooperation between the centering cone 7 and the inner holes 9 of workpieces 7 to be measured with various regular sizes, increasing its scope of use; then adjust the position of the slider 10 so that the bottom surface of the slider 10 contacts the workpiece 7 to be measured, and then place the measuring gauge 3 into the appropriate positioning hole 4, adjust the position of the shaft rod of the measuring gauge 3 to make the value on the dial of the measuring gauge 3 centered. Then hold the handle 1 and rotate the measuring tool body 2 around its central hole 6, and observe the value on the dial of the dial indicator or micrometer to complete the measurement.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An instrument for measuring the plane runout of a cylindrical end surface, characterized in that: include: A measuring tool body, wherein a center hole is opened in the middle of the measuring tool body, and a centering cone is arranged below the center hole by arranging a screw in the center hole; Positioning holes are provided at both ends of the central hole, and a measuring meter is movably inserted into the positioning holes, and the measuring meter is fixed by rotating a tightening screw arranged on a side wall of the positioning hole; A left-right symmetrical guide rail is arranged at the middle and lower part of the side wall of the measuring tool body, and sliders are arranged on both sides of the centering cone. The centering cone is used to insert into the inner hole of the workpiece to be measured, and the slider is moved along the guide rail so that the bottom surface of the slider contacts the workpiece to be measured. After the measuring table is inserted into the positioning hole to contact the workpiece to be measured and fixed, the measuring tool body is rotated around the center hole to complete the measurement.

2. The measuring instrument for cylindrical end face plane runout according to claim 1, characterized in that: Both ends of the measuring tool body are also provided with handles for easy gripping.

3. The measuring instrument for cylindrical end face plane runout according to claim 1, characterized in that: The positioning holes are arranged along the length direction of the measuring tool body, and 4 to 8 positioning holes are arranged.

4. The measuring instrument for cylindrical end face plane runout according to claim 3, characterized in that: The distances from the positioning holes on the same side of the center hole to the center hole are distributed in an arithmetic progression.

5. The measuring instrument for cylindrical end face plane runout according to claim 1, characterized in that: Limiting blocks are arranged at both ends of the guide rail to prevent the sliding block from falling off the guide rail.

6. The measuring instrument for cylindrical end face plane runout according to claim 5, characterized in that: The limit block is provided with a fixing screw and is connected with the measuring tool body.

7. The measuring instrument for cylindrical end face plane runout according to claim 1, characterized in that: The sliding block is mounted on the guide rail via hooks.

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