CN102901430B - Axial depth measurement mechanism for under cutting groove - Google Patents

Abstract

The invention relates to an axial depth measurement mechanism for sinking and cutting grooves, which includes a clamp dial indicator, a locking block, a clamp cover, an upper gauge body, a lower gauge body, a measuring needle, a lever and an extension rod; the upper gauge body The upper end is press-fitted with the clip cover, and the dial indicator is fixed by the locking block; the head of the dial indicator is equipped with an extension rod, and the extension rod is provided with an opening retaining ring. The opening retaining ring is equipped with a first compression spring, and the lever is installed on the upper gauge The lower end of the body rotates around the pin; the lower end of the lever is equipped with a stylus; the upper body and the lower body are connected by screws; There are two rams. The invention can quickly measure the axial depth of the undercutting groove, conveniently rotate the lever, the measuring needle can be retracted to facilitate insertion and extraction of the workpiece, and the measurement accuracy can be improved; the detection equipment can inspect higher-level dimensions; the measurement is simple , Fast, can greatly improve work efficiency while ensuring measurement accuracy.

Description

Axial Depth Measuring Mechanism for Undercutting Groove

technical field

The invention relates to a mechanism for measuring the axial depth of an undercut groove of a shaft part, and belongs to the technical field of measurement and inspection devices.

Background technique

The undercut groove of shaft parts refers to the arc-shaped undercut at the root of the outer circle of shaft parts. The axial depth of the undercut groove refers to the distance from the top of the arc to the end face. Currently, there are only three coordinates that can measure this axial depth. Although the three-coordinate measurement method can accurately measure the axial depth of the undercut groove, the operation is complicated and the time consumption is very long, so it is not suitable for the inspection process of mass production of workpieces.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide an axial depth measurement mechanism for undercut grooves with high measurement accuracy, simple operation and high measurement efficiency.

According to the technical solution provided by the present invention, the axial depth measurement mechanism of the undercutting groove includes a clamp dial indicator, a locking block, a clamp cover, an upper gauge body, a lower gauge body, a measuring needle, a lever, an extension rod, a first Compression spring, opening retaining ring and ejector rod; the upper end of the upper gauge body is press-fitted with a clamp cover, and the dial indicator is fixed by a locking block; an extension rod is installed on the head of the dial indicator, and an opening stopper is arranged on the extension rod The ring is equipped with a compression spring on the opening retaining ring, and the lever is installed at the lower end of the upper gauge body to rotate around the pin; the lower end of the lever is equipped with a measuring needle; the upper gauge body and the lower gauge body are connected by screws; the upper end of the lower gauge body is equipped with a limit screw and a button, The button is limited to move in the lower regulation body by a limit pin, and there are two push rods at the lower end of the lower regulation body, and the push rods are limited to move in the lower regulation body by a limit screw.

As a further improvement of the present invention, the button is equipped with a second compression spring, and the compression spring acts on the button.

As a further improvement of the present invention, a third compression spring is installed on the ejector rod, and the ejector rod is limited in the lower body by the limit screw.

As a further improvement of the present invention, the lever is in clearance fit with the upper gauge body, and in clearance fit with the pin to control the shaking of the lever.

As a further improvement of the present invention, the button is in clearance fit with the lower body.

The invention has a simple, compact and reasonable structure; it can quickly measure the axial depth of the undercut groove, and the lever can be rotated by a button to facilitate insertion of the workpiece; the measurement is simple and fast, and can greatly improve the work efficiency while ensuring the measurement accuracy.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a C-C sectional view of Fig. 1 .

Fig. 3 is a B-B sectional view of Fig. 1 .

Detailed ways

The present invention will be further described below in conjunction with specific drawings and embodiments.

As shown in Figures 1 to 3: the present invention mainly consists of clamping dial indicator 1, locking block 2, clamping cover 3, upper gauge body 4, screw 5, lower gauge body 6, screw 7, measuring needle 8, lever 9. Limit screw 10, extension rod 11, first compression spring 12, opening retaining ring 13, limit screw 14, limit pin 15, button 16, second compression spring 17, pin 18, ejector rod 19, third Compression spring 20 etc. are formed.

In the mechanism for measuring the axial depth of the undercut groove of the present invention, the upper end of the upper gauge body 4 is press-fitted with the gauge cover 3 , and the dial indicator 1 is fixed by the locking block 2 . Dial gauge 1 head is equipped with extension bar 11, and extension bar 11 is provided with opening retaining ring 13, and first compression spring 12 is housed on the opening retaining ring, and first compression spring 12 acts on the opening retaining ring 13. Lever 9 is contained in upper regulation body 4 lower ends, and described lever 9 and upper regulation body 4 clearance fits, and pin 18 clearance fits, and rotates around pin 18. The lever 9 is in contact with the extension rod 11 through a steel ball press-fitted in the lever 9 . The lower end of the lever 9 is equipped with a probe 8, which is clamped by a screw 7. The upper body 4 and the lower body 6 are connected by screws 5 . Limit screw 14 and button 16 are installed on the upper end of the lower regulation body 6, and the second compression spring 17 is housed behind the button. There are two push rods 19 at the lower end of the lower gauge body 6 , and the two push rods 19 are limited to move in the lower gauge body 6 by the stop screw 10 . The third compression spring 20 is housed behind the two push rods 19, and the push rod 19 is limited in the lower gauge body 6 by the limit screw.

The clamp cover 3 is mounted on the upper gauge body 4 through interference fit. Upper gauge body 4 and lever 9 are matched by clearance, and the cooperation clearance is less, and purpose is to control the rocking of lever 9, and lever 9 rotates around pin 18. Stop screw 14 purpose is equipped with the stop screw 14 purpose on lower regulation body 6 upper ends to adjust the range of motion of lever 9. The lower gauge body 6 upper end is equipped with a button 16 purpose to withstand the lever 9, so that the gauge is inserted in the workpiece conveniently, and the button and the lower gauge body are clearance fits. As shown in Figure 2, the lower end of the lower gauge body 6 is equipped with a push rod 19, the purpose is to push the gauge to stick to the workpiece in one direction during work, so as to facilitate measurement.

Working principle and working process of the present invention:

In the measurement state, the button 16 is released, and the button 16 resets under the action of the compressed spring. Under the action of the compression spring 12, the opening retaining ring 13 is pushed to push the extension rod 11, and the extension rod 11 moves downward to transmit the active force to the lever 9, the lever 9 rotates around the pin 18, and the probe 8 on the lever 9 contacts the workpiece.

In recovery state, press the button 16, overcome the active force of the first compression spring 12, lift the lever 9 upwards, the lever 9 rotates around the pin 18, and the probe 8 on the lever 9 is separated from the workpiece. At this time, the entire gauge can be moved from Take out or insert the workpiece into the workpiece.

When performing zero calibration, first press the button 16 and then put the entire gauge in the calibration piece, release the button 16, the stylus 8 will pop out, and the axial depth change will be transmitted through the lever 9 and the extension rod 11, and the displayed The value is zeroed.

After the zero calibration is completed, the workpiece can be measured in the same way, and the value displayed by the measuring instrument is the variation of the axial depth of the undercut groove relative to the calibration piece.

Claims (2)

1. A mechanism for measuring the axial depth of an undercut groove, characterized in that it includes a clamp dial indicator (1), a locking block (2), a clamp cover (3), an upper gauge body (4), and a lower gauge body (6), stylus (8), lever (9), extension rod (11), first compression spring (12), opening retaining ring (13) and ejector rod (19); ) is press-fitted with the clamp meter cover (3), and the dial indicator (1) is fixed by the locking block (2); the head of the dial indicator (1) is equipped with an extension rod (11), and the extension rod (11) Be provided with opening retaining ring (13), the first compression spring (12) is housed on the opening retaining ring (13), lever (9) is contained in the lower end of upper regulation body (14) and rotates around pin (18); Lever (9) The lower end is equipped with a stylus (8); the upper gauge body (4) and the lower gauge body (6) are connected by screws (5); the upper end of the lower gauge body (6) has a button (16), and the lower gauge body (6) has a Two ejector rods (19), the ejector rods (19) are limited to move in the lower gauge body (6) by limit screws (10); The button (16) is equipped with a second compression spring (17); the push rod (19) is equipped with a third compression spring (20). 2. The mechanism for measuring the axial depth of the undercut groove according to claim 1, characterized in that: the button (16) and the lower gauge body (6) are clearance fit.