Auxiliary device for zero correction of micrometer depth gauge

Abstract

The utility model discloses a micrometer depth gauge zero position correction auxiliary device, the micrometer depth gauge comprises a pedestal and a measuring shaft, the auxiliary device comprises a base plate, a flat plate, a support plate, a first screw rod and a pressing plate, the flat plate is detachably connected on the upper side of the base plate, the upper side of the flat plate is horizontal, the support plate is fixed above the flat plate, the pressing plate is horizontally arranged between the support plate and the flat plate, and the first screw rod is fixed on the pressing plate. The first screw rod is in vertical threaded connection with the supporting plate, the lower end of the first screw rod is rotatably connected with the pressing plate, one side of the pressing plate is provided with an avoiding groove used for avoiding a measuring shaft of the depth micrometer, and the first screw rod is rotated to enable the pressing plate to tightly press a base of the depth micrometer on the flat plate. According to the auxiliary device for zero correction of the micrometer depth gauge, the base can be stably attached to a flat plate, and the correction quality is improved.

Description

A depth micrometer zero-point calibration auxiliary device Technical Field

[0001] This utility model relates to the field of auxiliary device technology, and in particular to an auxiliary device for zero-position correction of a depth micrometer. Background Technology

[0002] In measuring the depth of grooves in metal sheaths, the depth micrometer is a commonly used precision measuring tool. To ensure the accuracy of the measurement data, the depth micrometer must be zero-calibrated before use.

[0003] Currently, traditional zero-point calibration methods rely on Grade 0 granite surface plates, which are operated by professional calibrators in a metrology laboratory. However, existing Grade 0 granite surface plates are relatively large (typically standard sizes such as 300mm × 300mm × 100mm), making them difficult to transport to the production site, resulting in a cumbersome and inefficient calibration process. Furthermore, calibration requires manual pressing on both sides of the depth micrometer base, which has poor pressure stability and can easily lead to the base not fully adhering to the surface plate, causing zero-point offset, measurement errors, and affecting product quality. Summary of the Invention

[0004] To address the shortcomings of existing depth micrometer zero-point calibration methods where manual pressing of the base can easily lead to incomplete contact between the base and the flat plate, this invention proposes a depth micrometer zero-point calibration auxiliary device. This device ensures stable contact between the base and the flat plate, thereby improving calibration quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A zero-point calibration auxiliary device for a depth micrometer is disclosed. The depth micrometer includes a base and a measuring shaft. The auxiliary device includes a base plate, a flat plate, a support plate, a first screw, and a pressure plate. The flat plate is detachably connected to the upper side of the base plate and is horizontal. The support plate is fixed above the flat plate. The pressure plate is horizontally positioned between the support plate and the flat plate. The first screw is vertically threaded onto the support plate, and its lower end is rotatably connected to the pressure plate. One side of the pressure plate is provided with a clearance groove for avoiding the measuring shaft of the depth micrometer. Rotating the first screw causes the pressure plate to press the base of the depth micrometer firmly onto the flat plate.

[0007] With the above settings, rotating the first screw can control the up and down movement of the pressure plate, so that the pressure plate presses against the base. This is for the threaded engagement between the first screw and the support plate. After the first screw stops rotating, it can self-lock, so that the pressure plate can stably press against the base, thereby making the base stably and tightly attached to the upper side of the plate. When the depth micrometer is being zeroed, the base will not move, thus improving the calibration quality.

[0008] Furthermore, the auxiliary device also includes a second screw and a guide post. The second screw is vertically threaded onto the support plate, and a guide groove is coaxially provided at the lower end of the second screw. The upper end of the guide post is slidably connected in the guide groove, and the lower end of the guide post is fixedly connected to the pressure plate.

[0009] With the above settings, the pressure plate can only move up and down, and the second screw can press the pressure plate down to improve the uniformity of the force on the pressure plate.

[0010] Furthermore, there are two support plates, which are positioned above opposite ends of the flat plate. The first screw is threadedly connected to one of the support plates, and the second screw is threadedly connected to the other support plate.

[0011] Furthermore, the lower end of the second screw protrudes circumferentially to form a truncated cone, and a horizontal support surface is provided on the lower side of the truncated cone, which can fit against the upper side of the pressure plate.

[0012] The above settings increase the contact area between the lower end of the second screw and the pressure plate, preventing the lower end of the second screw from damaging the pressure plate.

[0013] Furthermore, the auxiliary device also includes a nut that is fixedly connected to the upper ends of the first screw and the second screw.

[0014] The above settings facilitate manual rotation of the first and second screws.

[0015] Furthermore, the auxiliary device also includes a rubber pad installed on the underside of the pressure plate.

[0016] With the above settings, the rubber pad acts as a buffer to prevent the pressure plate from damaging the base.

[0017] Furthermore, the auxiliary device also includes bolts. The underside of the plate is provided with threaded holes, and the bolts pass through the base plate and are screwed into the threaded holes.

[0018] With the above setup, the bolts secure the flat plate to the base plate. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the auxiliary device in the embodiment.

[0020] Figure 2 is a cross-sectional view AA of Figure 1. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0022] As shown in Figures 1 and 2, a zero-point calibration auxiliary device for a depth micrometer is provided. The depth micrometer includes a base 3 and a measuring shaft 4. The auxiliary device includes a base plate 5, a flat plate 6, a support plate 7, a first screw 8, and a pressure plate 9. The flat plate 6 is detachably connected to the upper side of the base plate 5 and is horizontal. The support plate 7 is fixed above the flat plate 6. The pressure plate 9 is horizontally positioned between the support plate 7 and the flat plate 6. The first screw 8 is vertically threaded onto the support plate 7 and its lower end is rotatably connected to the pressure plate 9. One side of the pressure plate 9 is provided with a clearance groove 10 for avoiding the measuring shaft 4 of the depth micrometer. Rotating the first screw 8 causes the pressure plate 9 to press the base 3 of the depth micrometer onto the flat plate 6.

[0023] With the above settings, rotating the first screw 8 can control the up and down movement of the pressure plate 9, so that the pressure plate 9 presses against the base 3. This is for the threaded engagement between the first screw 8 and the support plate 7. After the first screw 8 stops rotating, it can self-lock, so that the pressure plate 9 can stably press the base 3, thereby making the base 3 stably and tightly attached to the upper side of the plate 6. When the depth micrometer is calibrated at the zero position, the base 3 will not move, thus improving the calibration quality.

[0024] The calibration auxiliary device of this application is used for zero-point calibration of a depth micrometer. Existing depth micrometers include a base 3 and a measuring shaft 4. The lower side of the base 3 is horizontal, and the measuring shaft 4 is vertically mounted on the upper side of the base 3. During zero-point calibration, the base 3 needs to be pressed tightly against the upper side of a plate 6. Specifically, the plate 6 is a granite plate 6 with dimensions of 70mm*70mm and a thickness of 10mm, making the auxiliary device lightweight and easy to carry. A connecting plate is vertically fixed to the edge of the base plate 5, and a support plate 7 is horizontally fixed to the upper end of the connecting plate. Manually rotating the first screw 8 causes the first screw 8 and the support plate 7 to rotate relative to each other. The first screw 8 drives the pressure plate 9 to move up and down, as shown in Figure 2. The clearance groove 10 is basically U-shaped, and its width is adapted to the outer diameter of the measuring shaft 4. The measuring shaft 4 of the depth micrometer is embedded in the clearance groove 10, causing the base 3 to move to the lower side of the pressure plate 9. The first screw 8 is manually rotated, causing the pressure plate 9 to move downward. The pressure plate 9 presses the base 3 tightly against the upper side of the plate 6, with the lower side of the base 3 in contact with the upper side of the plate 6, and the lower side of the pressure plate 9 in contact with the upper side of the base 3. After the first screw 8 stops rotating, it has a self-locking characteristic, and the pressure plate 9 will not loosen. The base 3 will not move when the depth micrometer is performing zero-point calibration, thereby improving the calibration quality. The pressure plate 9 of this application is basically rectangular, which can be adapted to bases 3 of different sizes, and has good versatility.

[0025] As one implementation, the auxiliary device also includes a second screw 11 and a guide post 12. The second screw 11 is vertically threaded onto the support plate 7. A guide groove 13 is coaxially provided at the lower end of the second screw 11. The upper end of the guide post 12 is slidably connected in the guide groove 13. The lower end of the guide post 12 is fixedly connected to the pressure plate 9.

[0026] With the above settings, the pressure plate 9 can only move up and down, and the second screw 11 can press the pressure plate 9 downward to improve the uniformity of the force on the pressure plate 9.

[0027] The second screw 11 and the first screw 8 are symmetrically arranged on the upper side of the pressure plate 9. When the first screw 8 is rotated, it drives the pressure plate 9 and the guide post 12 to move downward. The guide post 12 moves slowly downward along the guide groove 13, and the guide post 12 makes the pressure plate 9 move only up and down. After the first screw 8 presses the right end of the base 3 through the pressure plate 9, the second screw 11 is rotated, and the second screw 11 rotates relative to the support plate 7. The second screw 11 moves downward, and finally, the lower end of the second screw 11 presses the left end of the base 3 through the pressure plate 9. At this point, the second screw 11 and the first screw 8 press down on the left and right ends of the base 3 respectively, and the pressure on the base 3 is evenly distributed from left to right, which improves the locking effect of the base 3 and further improves the calibration quality.

[0028] As one implementation, there are two support plates 7, which are positioned above the opposite ends of the flat plate 6. The first screw 8 is threadedly connected to one of the support plates 7, and the second screw 11 is threadedly connected to the other support plate 7.

[0029] As one implementation, the lower end of the second screw 11 protrudes circumferentially to form a truncated cone 14, and a horizontal support surface 15 is provided on the lower side of the truncated cone 14, which can fit against the upper side of the pressure plate 9.

[0030] By setting the above, the contact surface between the lower end of the second screw 11 and the pressure plate 9 is increased, preventing the lower end of the second screw 11 from damaging the pressure plate 9.

[0031] As one implementation method, the auxiliary device also includes a nut 16 that is fixedly connected to the upper ends of the first screw 8 and the second screw 11.

[0032] The above settings facilitate manual rotation of the first screw 8 and the second screw 11.

[0033] As one implementation method, the auxiliary device also includes a rubber pad 17 installed on the underside of the pressure plate 9.

[0034] With the above settings, the rubber pad 17 acts as a buffer to prevent the pressure plate 9 from damaging the base 3.

[0035] As one implementation method, the auxiliary device also includes a bolt 18. The lower side of the plate 6 is provided with a threaded hole, and the bolt 18 passes through the base plate 5 and is screwed into the threaded hole.

[0036] With the above setup, bolt 18 locks the flat plate 6 onto the base plate 5.

[0037] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A zero-point calibration auxiliary device for a depth micrometer, the depth micrometer comprising a base and a measuring axis, characterized in that, The auxiliary device includes a base plate, a flat plate, a support plate, a first screw, and a pressure plate. The flat plate is detachably connected to the upper side of the base plate and is horizontal. The support plate is fixed above the flat plate. The pressure plate is horizontally positioned between the support plate and the flat plate. The first screw is vertically threaded onto the support plate, and its lower end is rotatably connected to the pressure plate. One side of the pressure plate is provided with a clearance groove for avoiding the measuring axis of the depth micrometer. Rotating the first screw causes the pressure plate to press the base of the depth micrometer firmly onto the flat plate.

2. The depth micrometer zero-position correction auxiliary device according to claim 1, characterized in that, The auxiliary device also includes a second screw and a guide post. The second screw is vertically threaded onto the support plate, and a guide groove is coaxially provided at the lower end of the second screw. The upper end of the guide post is slidably connected in the guide groove, and the lower end of the guide post is fixedly connected to the pressure plate.

3. The depth micrometer zero-position correction auxiliary device according to claim 2, characterized in that, The support plate consists of two pieces, which are positioned above opposite ends of the flat plate. The first screw is threadedly connected to one of the support plates, and the second screw is threadedly connected to the other support plate.

4. The depth micrometer zero-position correction auxiliary device according to claim 3, characterized in that, The lower end of the second screw protrudes circumferentially to form a truncated cone, and a horizontal support surface is provided on the lower side of the truncated cone, which can fit against the upper side of the pressure plate.

5. The depth micrometer zero-position correction auxiliary device according to claim 3, characterized in that, The auxiliary device also includes a nut that is fixedly connected to the upper ends of the first screw and the second screw.

6. The depth micrometer zero-position correction auxiliary device according to claim 3, characterized in that, The auxiliary device also includes a rubber pad installed on the underside of the pressure plate.

7. The depth micrometer zero-position correction auxiliary device according to claim 3, characterized in that, The auxiliary device also includes bolts, and the lower side of the plate is provided with threaded holes. The bolts pass through the base plate and are screwed into the threaded holes.

Images