A micrometer testing device

Abstract

This utility model discloses a micrometer calibration device, relating to the technical field of calibration devices. It includes a protective shell, with a slide rail fixedly connected to the top of the inner wall of the protective shell. A threaded hole is provided on the left side of the protective shell, and a self-locking screw is threadedly connected to the left side of the protective shell. The self-locking screw has a circular hole inside, and a knob is fixedly connected to one end of the self-locking screw. This utility model uses a top column to push a fixing mechanism to move, causing the micrometer body to move closer to a standard block. When the micrometer body contacts the standard block, the force required to rotate the micrometer body increases. Spring 1 effectively prevents the top column from squeezing the standard block, preventing the knob 2 from rotating. Knob 2 drives the rotating screw of the micrometer body to rotate via a rotating shaft and connecting block, thereby enabling measurement of the standard block. When the micrometer body contacts the standard block, the increased rotational force causes spring 2 to undergo torsional deformation, thus preventing excessive force from squeezing the standard block.

Description

Technical Field

[0001] This utility model relates to the field of calibration device technology, specifically to a micrometer calibration device. Background Technology

[0002] In micrometer calibration, standard blocks are used to calibrate measurement accuracy. However, in practice, the contact force between the calibration device and the standard block is difficult to control precisely: excessive force can cause excessive compression of the standard block, leading to microscopic deformation or wear and introducing measurement errors; insufficient force will leave gaps between them, preventing effective contact and causing the measured value to deviate from the true size. This imbalance in force directly affects the accuracy of the calibration results and has become a key technical bottleneck restricting the improvement of micrometer traceability accuracy. Therefore, it is necessary to achieve precise control of the contact force through device structure optimization.

[0003] Patent publication number CN202547522U describes a special calibration device for micrometers. A vertical column is provided above the base plate, and a horizontal clamping body is provided at the top of the column. A pad that can slide along the column is also provided on the column. A screw is provided at the end of the clamping body, and the bottom surface of the screw contacts the pad.

[0004] To address the issues of manually placing different sized gauge blocks each time, requiring micrometers to be repositioned, and the high precision of the gauge blocks causing changes in their size due to body heat during manual placement, thus affecting measurement accuracy, existing technology uses a base plate and pads to clamp the standard gauge blocks, allowing the micrometer scale to be calibrated directly on the workbench. However, this method still has drawbacks: excessive force when measuring the standard block can cause it to be squeezed, while insufficient force can leave gaps between the micrometer and the standard block, leading to inaccurate calibration results. Utility Model Content

[0005] The purpose of this invention is to provide a micrometer calibration device to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A micrometer calibration device includes a protective shell. A slide rail is fixedly connected to the top of the inner wall of the protective shell. A threaded hole is provided on the left side of the protective shell. A self-locking screw is threadedly connected to the left side of the protective shell. A circular hole is provided inside the self-locking screw. A knob is fixedly connected to one end of the self-locking screw. A spring is fixedly connected inside the circular hole of the self-locking screw. A top post is fixedly connected to the end of the spring. The top post is inserted into the other end of the self-locking screw. A slider is slidably connected inside the slide rail. A sleeve is fixedly connected to the bottom of the slider. The sleeve is inserted into the right side of the protective shell. A connecting block is actively connected to the left side of the sleeve. A fixing buckle is movably connected to the left side of the connecting block. A groove is provided at the axis of the connecting block. A rotating shaft is fixedly connected to the axis of the connecting block. A knob is rotatably connected to the right side of the rotating shaft. A spring is inserted inside the sleeve. The two ends of the spring are fixedly connected to the surfaces of the knob and the rotating shaft, respectively. The micrometer body is inserted into the left side of the fixing buckle.

[0008] It also includes a height adjustment mechanism, a fixing mechanism, a moisture-proof mechanism, and an observation mechanism;

[0009] The height adjustment mechanism is used to adjust the height of the standard block to facilitate measurement and testing.

[0010] The fixing mechanism is used to fix the micrometer;

[0011] The moisture-proof mechanism is used to prevent the device from getting damp and affecting its accuracy.

[0012] The observation mechanism is used to observe the readings on the micrometer.

[0013] A further improvement of this utility model is that: a sealing door is hinged to the front of the protective shell, a sliding groove is fixedly connected to the top of the inner wall of the protective shell, a sealing cover plate is fixedly connected to the top of the sliding groove, and a self-locking screw is set inside the sliding groove.

[0014] A further improvement of this utility model is that the height adjustment mechanism includes a fixed base, which is fixedly connected to the bottom of the inner wall of the protective shell. A standard block is inserted into the inside of the fixed base, and a screw sleeve is fixedly connected to the bottom of the standard block. A self-locking screw rod is threadedly connected to the inside of the screw sleeve. A turbine is rotatably connected to the bottom of the inner wall of the fixed base. The turbine is fixedly connected to the bottom of the self-locking screw rod. A worm gear is engaged on the side of the turbine. The worm gear passes through the front of the fixed base and is rotatably connected to the inside of the fixed base.

[0015] A further improvement of the present invention is that the fixing mechanism includes a sliding block, the sliding block is slidably connected inside the slide groove, a limiting plate is fixedly connected to the back of the sliding block, a clamping block is slidably connected to the surface of the limiting plate, a bearing is fixedly connected inside the clamping block and the sliding block, a bidirectional screw is fixedly connected inside the bearing, the two sides of the bidirectional screw have opposite threads, and the bidirectional screw is threadedly connected inside the clamping block.

[0016] A further improvement of the present invention is that the moisture-proof mechanism includes a moisture-proof box, which is fixedly connected to the bottom of the inner wall of the protective shell. The moisture-proof box contains a desiccant, and a top cover is inserted into the top of the moisture-proof box.

[0017] A further improvement of the present invention is that the observation mechanism includes a damping shaft, which is fixedly connected to the top of the inner wall of the protective shell. A connecting rod is rotatably connected inside the damping shaft, and a magnifying glass is actively connected to the end of the connecting rod.

[0018] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0019] 1. This utility model provides a micrometer calibration device, which adopts the cooperation of a protective shell, slide rail, sealing door, sealing cover plate, slide groove, self-locking screw one, knob one, top column, spring one, fixing buckle, sleeve, slider, rotating shaft, spring two, knob two, connecting block, micrometer body, fixing base, standard block, screw sleeve, self-locking screw two, worm gear, sliding block, limiting plate, clamping block, bidirectional screw, and bearing. By rotating the bidirectional screw, the bidirectional screw drives the two clamping blocks and the limiting plate to move in opposite directions. Then, the micrometer body is taken out and clamped between the two clamping blocks. Then, the bidirectional screw is reversed, and the two clamping blocks move closer to each other to clamp the micrometer body. After clamping, the rotating screw of the micrometer body is fixed on the fixing buckle. Then, the worm gear is rotated, and the worm gear drives the worm gear to rotate, which in turn drives the self-locking screw two to rotate inside the screw sleeve. This allows the standard block to move up and down, adjusting its height for easier measurement. Rotating the self-locking screw one causes it to move laterally within the groove, pushing the fixing mechanism via the top column, thus bringing the micrometer body closer to the standard block. When the micrometer body contacts the standard block, the force required to rotate it increases. Spring one effectively prevents the top column from squeezing the standard block, preventing the rotation of knob two. Knob two, through a rotating shaft and connecting block, drives the micrometer body's rotating screw to rotate, thus enabling measurement of the standard block. When the micrometer body contacts the standard block, the increased rotational force causes spring two to twist, preventing excessive force from squeezing the standard block and damaging it. Damage to the standard block could significantly deviate from the test results.

[0020] 2. This utility model provides a micrometer calibration device, which uses a moisture-proof box, a desiccant, a top cover, a damping shaft, a connecting rod, and a magnifying glass. The connecting rod is rotated to rotate the magnifying glass, which is then aligned with the scale on the micrometer body for observation. The calibration results are then recorded to test the accuracy of the micrometer body. After use, the device is reset, the top cover is opened, and a desiccant is placed inside the moisture-proof box. The sealed door is then closed to prevent the standard block from getting damp and rusting, which would affect the measurement accuracy. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the micrometer calibration device of this utility model;

[0022] Figure 2 This is a front view structural diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the moisture-proof mechanism of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the self-locking screw of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the fixing buckle of this utility model;

[0026] Figure 6 This is a schematic diagram of the height adjustment mechanism of this utility model;

[0027] Figure 7 This is a schematic diagram of the fixing mechanism of this utility model.

[0028] In the diagram: 5. Height adjustment mechanism; 6. Fixing mechanism; 7. Moisture-proof mechanism; 8. Observation mechanism; 11. Protective shell; 12. Slide rail; 13. Sealing door; 14. Sealing cover plate; 15. Slide groove; 21. Self-locking screw one; 22. Knob one; 23. Top column; 24. Spring one; 31. Fixing buckle; 32. Sleeve; 33. Slider; 34. Rotating shaft; 35. Spring two; 36. Knob two; 37. Connecting block; 41. Micrometer body; 51. Fixing base; 52. Standard block; 53. Screw sleeve; 54. Self-locking screw two; 55. Turbine; 56. Worm gear; 61. Sliding block; 62. Limiting plate; 63. Clamping block; 64. Bidirectional screw; 65. Bearing; 71. Moisture-proof box; 72. Desiccant; 73. Top cover; 81. Damping rotating shaft; 82. Connecting rod; 83. Magnifying glass. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to embodiments:

[0030] Example 1

[0031] like Figure 1-7 As shown, this utility model provides a micrometer calibration device, including a protective shell 11. A slide rail 12 is fixedly connected to the top of the inner wall of the protective shell 11. A threaded hole is opened on the left side of the protective shell 11, and a self-locking screw 21 is threadedly connected to the left side of the protective shell 11. A round hole is opened inside the self-locking screw 21, and a knob 22 is fixedly connected to one end of the self-locking screw 21. A spring 24 is fixedly connected inside the round hole of the self-locking screw 21, and a top post 23 is fixedly connected to the end of the spring 24. The top post 23 is inserted into the other end of the self-locking screw 21. The slide rail 12 is slidably connected inside. There is a slider 33, and a sleeve 32 is fixedly connected to the bottom of the slider 33. The sleeve 32 is inserted into the right side of the protective shell 11. A connecting block 37 is actively connected to the left side of the sleeve 32. A fixing buckle 31 is movably connected to the left side of the connecting block 37. A groove is opened at the axis of the connecting block 37. A rotating shaft 34 is fixedly connected to the axis of the connecting block 37. A knob 36 is rotatably connected to the right side of the rotating shaft 34. A spring 35 is inserted inside the sleeve 32. The two ends of the spring 35 are fixedly connected to the surfaces of the knob 36 and the rotating shaft 34, respectively. The micrometer body 41 is inserted into the left side of the fixing buckle 31.

[0032] It also includes a height adjustment mechanism 5, a fixing mechanism 6, a moisture-proof mechanism 7, and an observation mechanism 8;

[0033] The height adjustment mechanism 5 is used to adjust the height of the standard block 52 to facilitate measurement and testing;

[0034] The fixing mechanism 6 is used to fix the micrometer;

[0035] Moisture-proof mechanism 7 is used to prevent the device from getting damp and affecting its accuracy;

[0036] The observation mechanism 8 is used to observe the readings on the micrometer.

[0037] The protective shell 11 has a sealing door 13 hinged to the front, and a slide groove 15 is fixedly connected to the top of the inner wall of the protective shell 11. A sealing cover plate 14 is fixedly connected to the top of the slide groove 15, and a self-locking screw 21 is set inside the slide groove 15.

[0038] The height adjustment mechanism 5 includes a fixed base 51, which is fixedly connected to the bottom of the inner wall of the protective shell 11. A standard block 52 is inserted into the inside of the fixed base 51. A threaded sleeve 53 is fixedly connected to the bottom of the standard block 52. A self-locking screw 54 is threadedly connected to the inside of the threaded sleeve 53. A worm gear 55 is rotatably connected to the bottom of the self-locking screw 54. A worm 56 is engaged on the side of the worm gear 55. The worm 56 passes through the front of the fixed base 51 and is rotatably connected inside the fixed base 51.

[0039] The fixing mechanism 6 includes a sliding block 61, which is slidably connected inside the slide groove 15. A limiting plate 62 is fixedly connected to the back of the sliding block 61. A clamping block 63 is slidably connected to the surface of the limiting plate 62. A bearing 65 is fixedly connected inside the sliding block 61. A bidirectional screw 64 is fixedly connected inside the bearing 65. The two sides of the bidirectional screw 64 have opposite threads and are threadedly connected inside the clamping block 63.

[0040] In this embodiment, by rotating the bidirectional screw 64, the two clamping blocks 63 and the rock cone limiting plate 62 move in opposite directions. Then, the micrometer body 41 is taken out and clamped between the two clamping blocks 63. Then, the bidirectional screw 64 is reversed, and the two clamping blocks 63 move closer to each other to clamp the micrometer body 41. After clamping, the rotating screw of the micrometer body 41 is fixed on the fixing buckle 31. Then, the worm gear 56 is rotated, and the worm gear 56 drives the turbine 55 to rotate. The turbine 55 then drives the self-locking screw 54 to rotate inside the screw sleeve 53. This allows the standard block 52 to move up and down, adjusting its height for easier measurement. Rotating the self-locking screw 21 causes it to move laterally within the slide groove 15, pushing the fixing mechanism 6 via the top post 23, thus bringing the micrometer body 41 closer to the standard block 52. When the micrometer body 41 contacts the standard block 52, the force required to rotate it increases. Spring 24 effectively prevents the top post 23 from squeezing the standard block 52, preventing the rotation of knob 36. Knob 36, through the rotating shaft 34 and connecting block 37, drives the rotating screw of the micrometer body 41 to rotate, thus enabling measurement of the standard block 52. When the micrometer body 41 contacts the standard block 52, the increased force required for rotation causes spring 35 to twist, preventing excessive force from squeezing the standard block 52 and damaging it. Damage to the standard block 52 could lead to deviations in the test results.

[0041] Example 2

[0042] like Figure 1-7 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the moisture-proof mechanism 7 includes a moisture-proof box 71, which is fixedly connected to the bottom of the inner wall of the protective shell 11. A desiccant 72 is provided inside the moisture-proof box 71, and a top cover 73 is inserted into the top of the moisture-proof box 71. The observation mechanism 8 includes a damping shaft 81, which is fixedly connected to the top of the inner wall of the protective shell 11. A connecting rod 82 is rotatably connected inside the damping shaft 81, and a magnifying glass 83 is actively connected to the end of the connecting rod 82.

[0043] In this embodiment, the connecting rod 82 is then rotated to rotate the magnifying glass 83, and the magnifying glass 83 is aligned with the scale on the micrometer body 41 for observation. The calibration result is then recorded to test the accuracy of the micrometer body 41. After use, the device is reset, and the top cover 73 is opened to put the desiccant 72 into the moisture-proof box 71. Then the sealing door 13 is closed to prevent the standard block 52 from getting damp and rusting, which would affect the measurement accuracy.

[0044] The working principle of this micrometer calibration device will be explained in detail below.

[0045] like Figure 1-7As shown, by rotating the bidirectional screw 64, the bidirectional screw 64 drives the two clamping blocks 63 and the rock cone limiting plate 62 to move in opposite directions. Then, the micrometer body 41 is taken out and clamped between the two clamping blocks 63. Then, the bidirectional screw 64 is reversed, and the two clamping blocks 63 move closer to each other to clamp the micrometer body 41. After clamping, the rotating screw of the micrometer body 41 is fixed on the fixing buckle 31. Then, the worm gear 56 is rotated, and the worm gear 56 drives the turbine 55 to rotate. The turbine 55 then drives the self-locking screw 54 to rotate inside the screw sleeve 53. This allows the standard block 52 to move up and down, adjusting its height for easier measurement. Rotating the self-locking screw 21 causes it to move laterally within the slide groove 15, pushing the fixing mechanism 6 via the top post 23, thus bringing the micrometer body 41 closer to the standard block 52. When the micrometer body 41 contacts the standard block 52, the force required to rotate it increases. Spring 24 effectively prevents the top post 23 from squeezing the standard block 52, preventing the rotation of knob 36. Knob 36, through the rotating shaft 34 and connecting block 37, drives the rotating screw of the micrometer body 41 to rotate, thus enabling measurement of the standard block 52. When the micrometer body 41 contacts the standard block 52, the increased force required for rotation causes spring 35 to twist, preventing excessive force from squeezing the standard block 52 and damaging it. Damage to the standard block 52 could lead to deviations in the test results.

[0046] Then rotate the connecting rod 82 to rotate the magnifying glass 83, align the magnifying glass 83 with the scale on the micrometer body 41 for observation, and record the calibration results to test the accuracy of the micrometer body 41. After use, reset the device, open the top cover 73 and put the desiccant 72 into the moisture box 71, and then close the sealing door 13 to prevent the standard block 52 from getting damp and rusting, which would affect the measurement accuracy.

[0047] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A micrometer calibration device, comprising a protective housing (11), characterized in that: A slide rail (12) is fixedly connected to the top of the inner wall of the protective shell (11). A threaded hole is provided on the left side of the protective shell (11). A self-locking screw (21) is threadedly connected to the left side of the protective shell (11). A round hole is provided inside the self-locking screw (21). A knob (22) is fixedly connected to one end of the self-locking screw (21). A spring (24) is fixedly connected inside the round hole of the self-locking screw (21). A top post (23) is fixedly connected to the end of the spring (24). The top post (23) is inserted into the other end of the self-locking screw (21). A slider (33) is slidably connected inside the slide rail (12). The bottom of the slider (33) is fixedly connected to... A sleeve (32) is attached to the right side of the protective shell (11). A connecting block (37) is actively connected to the left side of the sleeve (32). A fixing buckle (31) is movably connected to the left side of the connecting block (37). A groove is provided at the axis of the connecting block (37). A rotating shaft (34) is fixedly connected at the axis of the connecting block (37). A knob (36) is rotatably connected to the right side of the rotating shaft (34). A spring (35) is inserted inside the sleeve (32). The two ends of the spring (35) are fixedly connected to the surfaces of the knob (36) and the rotating shaft (34) respectively. A micrometer body (41) is inserted to the left side of the fixing buckle (31). It also includes a height adjustment mechanism (5), a fixing mechanism (6), a moisture-proof mechanism (7), and an observation mechanism (8); The height adjustment mechanism (5) is used to adjust the height of the standard block (52) to facilitate measurement and testing; The fixing mechanism (6) is used to fix the micrometer; The moisture-proof mechanism (7) is used to prevent the device from getting damp and affecting its accuracy; The observation mechanism (8) is used to observe the readings on the micrometer.

2. The micrometer calibration device according to claim 1, characterized in that: The protective shell (11) has a sealing door (13) hinged to its front side. The top of the inner wall of the protective shell (11) is fixedly connected to a slide groove (15). The top of the slide groove (15) is fixedly connected to a sealing cover plate (14). The self-locking screw (21) is located inside the slide groove (15).

3. The micrometer calibration device according to claim 1, characterized in that: The height adjustment mechanism (5) includes a fixed base (51), which is fixedly connected to the bottom of the inner wall of the protective shell (11). A standard block (52) is inserted into the inside of the fixed base (51). A screw sleeve (53) is fixedly connected to the bottom of the standard block (52). A self-locking screw rod (54) is threadedly connected to the inside of the screw sleeve (53). A turbine (55) is rotatably connected to the bottom of the inner wall of the fixed base (51). The turbine (55) is fixedly connected to the bottom of the self-locking screw rod (54). A worm gear (56) is engaged on the side of the turbine (55). The worm gear (56) passes through the front of the fixed base (51) and is rotatably connected to the inside of the fixed base (51).

4. A micrometer calibration device according to claim 2, characterized in that: The fixing mechanism (6) includes a sliding block (61), which is slidably connected inside the slide groove (15). A limiting plate (62) is fixedly connected to the back of the sliding block (61). A clamping block (63) is slidably connected to the surface of the limiting plate (62). A bearing (65) is fixedly connected inside the sliding block (61). A bidirectional screw (64) is fixedly connected inside the bearing (65). The threads on both sides of the bidirectional screw (64) are opposite in direction. The bidirectional screw (64) is threadedly connected inside the clamping block (63).

5. A micrometer calibration device according to claim 2, characterized in that: The moisture-proof mechanism (7) includes a moisture-proof box (71), which is fixedly connected to the bottom of the inner wall of the protective shell (11). The moisture-proof box (71) is provided with a desiccant (72) inside, and a top cover (73) is inserted into the top of the moisture-proof box (71).

6. A micrometer calibration device according to claim 1, characterized in that: The observation mechanism (8) includes a damping shaft (81), which is fixedly connected to the top of the inner wall of the protective shell (11). A connecting rod (82) is rotatably connected inside the damping shaft (81), and a magnifying glass (83) is actively connected to the end of the connecting rod (82).

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