Vernier caliper calibrating device

Abstract

The vernier caliper calibrating device comprises a supporting plate, the supporting plate is rotationally connected with a movable plate, the movable plate is fixedly connected with a plurality of upper ejector rods for fixing the upper portion of a main ruler, and the movable plate is slidably connected with a plurality of lower ejector rods for supporting the lower portion of the main ruler; the vernier caliper further comprises a plurality of pressing plates sliding in the vertical direction, the pressing plates are located on one side of the vernier scale of the main caliper, and the pressing plates can push the correspondingly-arranged lower ejector rods to move. The device is convenient to operate, can well fix the vernier caliper, effectively reduces the situations that the main caliper of the vernier caliper is bent and detection is inaccurate due to external force in the detection process, does not affect the multi-point detection work of the vernier caliper, and effectively improves the detection efficiency and quality.

Description

Technical Field

[0001] The present invention relates to the field of calibration technology, in particular to a vernier caliper calibration device. Background Art

[0002] A vernier caliper is a measuring tool for measuring length, inner and outer diameters, and depth. There are two pairs of movable jaws on the main scale and vernier of the vernier caliper, namely the inner measuring jaws and the outer measuring jaws. The inner measuring jaws are usually used to measure the inner diameter, and the outer measuring jaws are usually used to measure the length and outer diameter. In order to ensure the measurement accuracy of the vernier caliper, the inner and outer measuring jaws of the vernier caliper need to be inspected.

[0003] Currently, the most commonly used detection tool is the gauge block, which can be used to detect the outer measuring jaws. The inner measuring jaws require multiple gauge blocks to cooperate to achieve detection. During detection, for calipers with a measuring range within 300mm, no less than 3 points are evenly distributed. For calipers with a measuring range greater than 300mm, no less than 6 points are evenly distributed. On the one hand, existing block gauges are limited by the size requirements of the gauges themselves, and it is difficult to meet multi-size detection. In addition, existing block gauges can only detect the size of one point at a time, which cannot achieve the purpose of multi-point detection. The measurement takes a long time and the work efficiency is low. Moreover, the main caliper is easily bent due to human factors during detection, resulting in detection errors. Summary of the Invention

[0004] In order to solve the above problems in the prior art, a vernier caliper calibration device is provided.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] The present invention proposes a vernier caliper calibration device, comprising a support plate, the support plate being rotatably connected to a movable plate, the movable plate being fixedly connected to a plurality of upper push rods for fixing the upper part of the main scale, the movable plate being slidably connected to a plurality of lower push rods for supporting the lower part of the main scale; the lower push rods being connected to the support plate by springs, and further comprising a plurality of vertically sliding pressure plates, the pressure plates being located on one side of the vernier scale of the main scale, the pressure plates being capable of pushing the correspondingly arranged lower push rods to move.

[0007] Preferably, the support plate is connected with a stud, the stud is threadedly connected with a nut, and the movable plate is provided with a notch for the stud to slide into.

[0008] Preferably, the width of the nut is greater than the width of the notch, the bottom end of the stud is hinged to the support plate, and the support plate is fixedly connected with a limit block for limiting the rotation of the stud.

[0009] Preferably, the support plate is fixedly connected to a guide sleeve, a slide rod that moves in a vertical direction is slidably connected inside the guide sleeve, and the upper end of the slide rod is fixedly connected to the pressure plate.

[0010] Preferably, the support plate is rotatably connected to a sector gear, the sliding rod is rotatably connected to a connecting rod, and the other end of the connecting rod is rotatably connected to the sector gear.

[0011] Preferably, the support plate is rotatably connected to a first gear, the first gear is meshed with the sector gear, and the first gear is coaxially fixedly connected to a second gear; the lower push rod is fixedly connected to a rack arranged in a vertical direction, and the rack is meshed with the second gear.

[0012] Preferably, the support plate is fixedly connected with a gauge block groove for placing gauge blocks, and the gauge block groove is located on one side of the lower push rod.

[0013] Preferably, inclined surfaces are provided on both sides of the pressing plate, and the inclined surfaces are located on one side of the measuring claw of the vernier caliper.

[0014] Preferably, the support plate is also fixedly connected to a slide cylinder arranged in a vertical direction, the lower push rod is slidably arranged in the slide cylinder, the spring is arranged in the slide cylinder, the lower end of the spring is connected to the slide cylinder, and the upper end of the spring is connected to the upper push rod.

[0015] Preferably, the movable plate is also provided with an observation port.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present application is provided with a push rod, and the upper push rod and the lower push rod cooperate with each other to realize multi-point fixation of the vernier caliper, thereby improving the fixing effect of the vernier caliper. During the calibration process, when the vernier caliper moves, the lower push rod at the corresponding position can be driven to move, so that the lower push rod at the corresponding position can avoid the vernier caliper, thereby not affecting the progress of the detection work. When continuing the identification, the lower push rod can be reset again to realize auxiliary fixation of the vernier caliper. It is easy to operate and can better fix the vernier caliper, effectively reducing the bending of the caliper main scale due to external force during the detection process, resulting in inaccurate detection, etc., and at the same time it will not affect the multi-point detection work of the caliper, effectively improving the efficiency and quality of the calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 It is an overall stereogram of the present invention;

[0020] Figure 2 is a top view of the entire invention (excluding the movable panel);

[0021] Figure 3 It is the overall front view of the present invention;

[0022] Figure 4 It is an overall side view of the present invention;

[0023] Figure 5 yes Figure 2 A magnified view of the structure of the middle K part;

[0024] Figure 6 yes Figure 4 Enlarged view of the structure of the middle M part.

[0025] Description of the accompanying drawings:

[0026] 1. Stud; 2. Gauge block slot; 3. Support plate; 4. Movable plate; 5. Observation port; 6. Main scale; 7. Pressure plate; 8. First gear; 9. Sector gear; 10. Guide bushing; 11. Second gear; 12. Rack; 13. Lower ejector pin; 14. Upper ejector pin; 15. Connecting rod; 16. Sliding rod; 17. Spring; 18. Nut; 19. Vernier scale; 20. Measuring claw; 21. Inclined surface. DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] like Figure 1-6 As shown, this embodiment proposes a vernier caliper calibration device, including a support plate 3, which is rotatably connected to a movable plate 4. One end of the movable plate 4 can rotate around the support plate 3, thereby facilitating the placement of the vernier caliper.

[0029] The vernier caliper includes a main scale 6, a measuring claw 20 is fixedly connected to the left end of the main scale 6, a vernier scale 19 is slidably connected to the main scale 6, and the vernier scale 19 is fixedly connected to the measuring claw 20. The two measuring claws 20 cooperate with each other to measure the inner and outer diameters of an object, and can be used to measure the length, inner and outer diameters and depth of an object.

[0030] The movable plate 4 is fixedly connected to a plurality of upper push rods 14 for fixing the upper part of the main scale 6 , and the movable plate 4 is slidably connected to a plurality of lower push rods 13 for supporting the lower part of the main scale 6 , and the lower push rods 13 are connected to the support plate 3 through springs 17 .

[0031] The number of upper push rods 14 and lower push rods 13 is the same and corresponds one to one. A corresponding lower push rod 13 is set directly below each upper push rod 14. The upper push rods 14 and lower push rods 13 cooperate with each other to clamp the main scale 6 of the vernier caliper. There can be several upper push rods 14 and lower push rods 13, and at least three groups can be set to clamp different positions of the vernier caliper.

[0032] It also includes several vertically sliding pressure plates 7. The pressure plates 7 can only move in the vertical direction. The pressure plates 7 are located on one side of the vernier scale 19 of the main scale 6. The pressure plates 7 can push the corresponding lower push rod 13 to move. When the vernier scale 19 slides, the measuring claws 20 of the vernier scale 19 can drive the pressure plate 7 to move downward, and can drive the lower push rod 13 to move downward, so as to avoid the connected part below the vernier scale 19.

[0033] The support plate 3 is connected to the stud 1, and the stud 1 is threadedly connected to the nut 18. The movable plate 4 is provided with a notch for the stud 1 to slide into. The movable plate 4 rotates through the shaft and the support plate 3, and the notch is set at the end away from the shaft.

[0034] The width of the nut 18 is greater than the width of the notch. When the nut 18 is tightened, the support plate 3 can be driven to move downward, causing the upper push rod 14 to move downward, thereby completing the clamping of the vernier caliper. The bottom end of the stud 1 is hinged to the support plate 3, and the support plate 3 is fixedly connected to a limit block for limiting the rotation of the stud 1.

[0035] When the stud 1 is in a state perpendicular to the support plate 3, under the action of the limit block, the stud 1 can only rotate outward but cannot rotate inward. When disassembly is required, since the stud 1 can be rotated outward, there is no need to screw the nut 18 upward too far to achieve the rotation of the movable plate 4. Since the stud 1 cannot rotate inward, by tightening the nut 18, the movable plate 4 and the support plate 3 can be parallel to each other, which is convenient for clamping the vernier caliper.

[0036] The support plate 3 is fixedly connected with a guide sleeve 10, which is arranged in a vertical direction. A slide rod 16 that moves in a vertical direction is slidably connected inside the guide sleeve 10. The upper end of the slide rod 16 is fixedly connected to the pressure plate 7. Under the action of the guide sleeve 10, the slide rod 16 can only slide in the vertical direction.

[0037] The support plate 3 is rotatably connected to the sector gear 9, the slide rod 16 is rotatably connected to the connecting rod 15, the sector gear 9 is fixedly connected to the fixed rod, and the other end of the connecting rod 15 is rotatably connected to the fixed rod. When the slide rod 16 moves downward, the fixed rod can be driven to rotate by the connecting rod 15, and then the sector gear 9 can be driven to rotate. The sector gear 9 can only rotate, and the setting of the connecting rod 15 can prevent it from getting stuck.

[0038] The support plate 3 is rotatably connected to the first gear 8, the first gear 8 is meshed with the sector gear 9, and the first gear 8 is coaxially fixedly connected to the second gear 11; the lower push rod 13 is fixedly connected to the vertically arranged rack 12, and the rack 12 is meshed with the second gear 11.

[0039] When the sector gear 9 rotates, it can drive the first gear 8 to rotate, and the first gear 8 drives the second gear 11 to rotate. The second gear 11 can drive the lower push rod 13 to move downward through the rack 12, so that the lower push rod 13 can move to the bottom of the vernier 19, thereby avoiding the vernier 19. At this time, the remaining groups of lower push rods 13 and upper push rods 14 continue to clamp the vernier caliper.

[0040] The support plate 3 is also fixedly connected to a slide cylinder arranged in the vertical direction, the lower push rod 13 is slidably arranged in the slide cylinder, the spring 17 is arranged in the slide cylinder, the lower end of the spring 17 is connected to the slide cylinder, and the upper end of the spring 17 is connected to the upper push rod 13.

[0041] During clamping, spring 17 is always compressed, providing sufficient elastic force to push lower ejector pin 13 upward, thereby increasing the clamping force between lower ejector pin 13 and upper ejector pin 14 and preventing the vernier caliper from slipping. The lower surfaces of the multiple upper ejector pins 14 are in the same horizontal plane, so when the vernier caliper is in a horizontal state, the upper surfaces of the multiple lower ejector pins 13 are also in the same horizontal plane.

[0042] The support plate 3 is fixedly connected with a gauge block groove 2 for placing a gauge block. The gauge block groove 2 is located on one side of the lower push rod 13. By placing a gauge block in the gauge block groove 2, the distance between the measuring claws 20 can be measured by the gauge block, thereby realizing the identification of the vernier caliper.

[0043] Slanted surfaces 21 are provided on both sides of the pressure plate 7. The inclined surfaces 21 are located on one side of the measuring claws 20 of the vernier caliper 20. The length of the pressure plate 7 is suitable enough. Through the provided inclined surfaces 21, when the measuring claws 20 move to one side of the pressure plate 7, as the measuring claws 20 continue to move, the pressure plate 7 can be driven to move downward under the action of the inclined surfaces 21. When the vernier caliper 19 jumps over the corresponding lower push rod 13, the measuring claws 20 will move to one side of the pressure plate 7 at this time. Under the action of the spring 17, the lower push rod 13 is reset to re-clamp the vernier caliper.

[0044] The movable plate 4 is further provided with an observation port 5 for conveniently observing the verification result of the vernier caliper.

[0045] A method for using a vernier caliper calibration device, using the above-mentioned vernier caliper calibration device, includes the following steps:

[0046] S1: Rotate the movable plate 4 and place the main ruler 6 on several lower push rods 13. Then reset the movable plate 4, slide the stud 1 into the notch of the movable plate 4, and tighten the nut 18 downward. After the nut 18 contacts the upper surface of the movable plate 4, it drives the movable plate 4 and the upper push rod 14 to move downward. The upper push rod 14 and the lower push rod 13 cooperate with each other to clamp the main ruler 6.

[0047] S2: By moving the vernier 19, a gauge block is placed in the gauge block slot 2, and the distance between the measuring jaws 20 is measured. When the vernier 19 moves, the measuring jaws 20 drive the pressure plate 7 and the slide rod 16 to move downward, and the slide rod 16 drives the sector gear 9 to rotate through the connecting rod 15;

[0048] S3: The sector gear 9 drives the first gear 8 and the second gear 11 to rotate, the second gear 11 drives the rack 12 to move downward, and the rack 12 drives the lower push rod 13 at the corresponding position to move downward, thereby avoiding the vernier scale 19. As the vernier scale 19 continues to move, when the vernier scale 19 jumps over the lower push rod 13, the measuring claw 20 moves to one side of the pressure plate 7, and under the action of the spring 17, the corresponding lower push rod 13 is reset, and the upper push rod 14 and the lower push rod 13 cooperate with each other to clamp the main scale 6.

[0049] It should be noted that the upper push rod 14 and the lower push rod 13 cooperate with each other to achieve multi-point fixation of the vernier caliper, thereby improving the fixing effect of the vernier caliper. During the calibration process, when the vernier caliper 19 moves, the lower push rod 13 at the corresponding position can be driven to move, so that the lower push rod 13 at the corresponding position can avoid the vernier caliper 19, thereby not affecting the progress of the detection work.

[0050] When the identification is continued, the lower push rod 13 can be reset again to achieve auxiliary fixation of the vernier caliper. It is easy to operate and can better fix the vernier caliper, effectively reducing the bending of the caliper main scale due to external force during the detection process, resulting in inaccurate detection, etc. At the same time, it will not affect the multi-point detection of the caliper, effectively improving the efficiency and quality of the verification.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A vernier caliper calibration device, comprising a support plate (3), It is characterized in that The support plate (3) is rotatably connected to a movable plate (4), the movable plate (4) is fixedly connected to a plurality of upper push rods (14) for fixing the upper part of the main scale (6), and the movable plate (4) is slidably connected to a plurality of lower push rods (13) for supporting the lower part of the main scale (6); the lower push rods (13) are connected to the support plate (3) through springs (17), and also include a plurality of vertically sliding pressure plates (7), the pressure plates (7) are located on one side of the vernier scale (19) of the main scale (6), and the pressure plates (7) can push the correspondingly arranged lower push rods (13) to move.

2. A vernier caliper calibration device according to claim 1, It is characterized in that The support plate (3) is connected to a stud (1), the stud (1) is threadedly connected to a nut (18), and the movable plate (4) is provided with a notch into which the stud (1) can slide.

3. A vernier caliper calibration device according to claim 2, It is characterized in that The width of the nut (18) is greater than the width of the notch; the bottom end of the stud (1) is hinged to the support plate (3); and a limit block for limiting the rotation of the stud (1) is fixedly connected to the support plate (3).

4. A vernier caliper calibration device according to claim 1, It is characterized in that The support plate (3) is fixedly connected to a guide sleeve (10), a slide rod (16) that moves in a vertical direction is slidably connected inside the guide sleeve (10), and the upper end of the slide rod (16) is fixedly connected to the pressure plate (7).

5. A vernier caliper calibration device according to claim 4, It is characterized in that The support plate (3) is rotatably connected to a sector gear (9), the slide rod (16) is rotatably connected to a connecting rod (15), and the other end of the connecting rod (15) is rotatably connected to the sector gear (9).

6. A vernier caliper calibration device according to claim 5, It is characterized in that The support plate (3) is rotatably connected to a first gear (8), the first gear (8) is meshed with the fan-shaped gear (9), and the first gear (8) is coaxially fixedly connected to a second gear (11); the lower push rod (13) is fixedly connected to a rack (12) arranged in a vertical direction, and the rack (12) is meshed with the second gear (11).

7. A vernier caliper calibration device according to claim 1, It is characterized in that The support plate (3) is fixedly connected with a gauge block groove (2) for placing a gauge block, and the gauge block groove (2) is located on one side of the lower push rod (13).

8. A vernier caliper calibration device according to claim 1, It is characterized in that Inclined surfaces (21) are provided on both sides of the pressing plate (7), and the inclined surface (21) is located on one side of the measuring claw (20) of the vernier ruler (20).

9. A vernier caliper calibration device according to claim 1, It is characterized in that The support plate (3) is also fixedly connected to a slide cylinder arranged in a vertical direction, the lower push rod (13) is slidably arranged in the slide cylinder, the spring (17) is arranged in the slide cylinder, the lower end of the spring (17) is connected to the slide cylinder, and the upper end of the spring (17) is connected to the upper push rod (13).

10. A vernier caliper calibration device according to claim 1, It is characterized in that The movable plate (4) is also provided with an observation port (5).

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