A metering and testing clamping device

Abstract

This utility model belongs to the field of metrology and testing technology, specifically providing a metrology and testing clamping device, including a support unit, a clamping unit, and a pressure rod. The support unit includes a base, a column, and a support plate. A steel anvil is fixed on the base, and the pressure rod is threadedly engaged with the support plate. The clamping unit includes a connecting rod, a clamping sleeve, and a clamping sleeve. The connecting rod drives the clamping sleeve to move up and down along a groove on the column. The upper part of the clamping sleeve is a guide part, and the lower part is the clamping part. In this application, the pressure rod and the clamping unit work together to limit the rebound hammer, which helps to improve the accuracy of the rebound hammer calibration. The lower end of the clamping sleeve is divided into multiple clamping claws by a notch. Rotating the clamping sleeve adjusts the degree of convergence of the clamping claws, which can adapt to rebound hammers of different sizes. The product has a wider range of applications and stronger versatility, and can meet the calibration needs of metrology laboratories for different models and specifications of rebound hammers.

Description

Technical Field

[0001] This application belongs to the field of metrology and testing technology, and more specifically, relates to a metrology and testing clamping device. Background Technology

[0002] Metrological testing is an operation that verifies testing instruments to ensure the accuracy, reliability, and consistency of instrument measurement results.

[0003] A rebound hammer is an instrument used for testing concrete and is widely used in construction engineering. To ensure the accuracy of rebound hammer measurements, regular calibration is necessary. According to the national metrological verification standard "Rebound Hammer Verification Standard (JJG817-2011)," the calibration content for a rebound hammer includes appearance, the radius of the spherical end of the impact rod, the stiffness of the impact spring, the calibration value on the anvil, and the consistency of the indicated values. The anvil calibration test requires testing in four directions, with the impact rod rotated 90° each time, and three consecutive stable rebound values ​​recorded for each direction. In actual testing, the anvil is typically placed stably on a rigid surface. The rebound hammer is then manually held so that the impact rod is perpendicular to the anvil, and three impacts are made downwards, with the indicated values ​​recorded for each. The average of the three rebound values ​​is taken. After one test, the impact rod is rotated 90°, and the test is repeated. However, this method of manually holding the rebound hammer and striking the anvil cannot ensure that the impact rod is perpendicular downwards, which can affect the calibration accuracy.

[0004] To improve the calibration accuracy of rebound hammers, existing technologies include an improved structure in which a steel sleeve is fixedly mounted on a steel anvil. During calibration, the end of the rebound hammer is housed within the sleeve, which limits the swing amplitude of the rebound hammer and thus reduces measurement errors.

[0005] While the aforementioned improvements can limit the sway amplitude of the rebound hammer, the differences in shape and size between different specifications, models, and manufacturers of rebound hammers (including pointer and digital display types) make it impractical to customize a sleeve for each rebound hammer model. This would lead to cumbersome operation and high costs. To accommodate different types of rebound hammers, the metrology center typically uses a larger sleeve diameter. In actual use, the sleeve only serves to prevent excessive sway amplitude; the striking rod may still exhibit slight misalignment, resulting in errors in the calibration results. Utility Model Content

[0006] Based on the above-mentioned technical problems, this application provides a metrological testing clamping device to solve the technical problem in the prior art that the excessively large diameter of the sleeve for limiting the rebound spring may still cause the impact rod to become skewed.

[0007] To achieve the above objectives, the technical solution adopted in this application is: to provide a metrological testing clamping device, comprising:

[0008] The support unit includes a base, a column vertically disposed on the base, and a support plate disposed on the top of the column. The base is used to place a steel anvil. The column has a vertical groove. The support plate has a vertically penetrating adjustment hole, which corresponds vertically to the base.

[0009] A clamping unit includes a connecting rod, a clamping sleeve, and a pressing sleeve. The clamping sleeve is a hollow annular shape and has a guide portion and a clamping portion. The guide portion is located above the clamping portion. The clamping portion is funnel-shaped and has multiple notches evenly spaced along its circumference. The notches extend upward from the bottom of the clamping portion, and a clamping claw is formed between two adjacent notches. One end of the connecting rod is connected to the upper part of the guide portion, and the other end is slidably engaged with a groove. The pressing sleeve is fitted around the outer periphery of the clamping sleeve. The upper inner wall of the pressing sleeve is threaded into the outer wall of the guide portion. The lower inner wall of the pressing sleeve has an annular boss that abuts against the outer wall of the clamping portion.

[0010] The pressure rod is threaded into the adjustment hole.

[0011] In one possible implementation, the inner wall of each of the gripping claws is provided with a rubber protective pad.

[0012] In one possible implementation, the upper part of the notch has a circular slot.

[0013] In one possible implementation, the outer surface of the clamping sleeve is provided with gripping texture.

[0014] In one possible implementation, the metering and testing clamping device further includes a reversing unit, the reversing unit comprising:

[0015] A track, which is provided on the upper surface of the steel anvil, is circular;

[0016] A rotating ring is slidably fitted onto the track, and the rotating ring has two opposing clamping holes.

[0017] Two clamping rods are slidably disposed within the corresponding clamping holes; and

[0018] Two first springs are respectively sleeved on the corresponding clamping rods. One end of the first spring abuts against the outer wall of the rotating ring, and the other end abuts against the corresponding clamping rod.

[0019] In one possible implementation, the rotating ring is a C-shaped ring, the clamping rods are disposed opposite to each other at the two ends of the C-shaped ring, and the metering and detection clamping device further includes a pressure sensor detachably disposed on the upper surface of the steel anvil, the pressure sensor being located at the center of the track, and the signal line of the pressure sensor extending from the notch of the C-shaped ring.

[0020] In one possible implementation, a handwheel is attached to the top of the pressure rod.

[0021] In one possible implementation, a vertical guide rod is provided in the groove, the connecting rod slides with the guide rod, and a second spring is sleeved on the guide rod. One end of the second spring abuts against the base, and the other end of the second spring abuts against the connecting rod.

[0022] In one possible implementation, the lower end of the pressure rod is rotatably fitted with a pressure plate.

[0023] In one possible implementation, the surface of the boss that contacts the clamping part is a tapered surface.

[0024] Compared with the prior art, the beneficial effects of the metrological testing clamping device provided in this application are:

[0025] This application provides a metrological testing clamping device comprising a support unit, a clamping unit, and a pressure rod. The support unit includes a base, a column, and a support plate. A steel anvil is fixed on the base, and the pressure rod is threadedly engaged with the support plate. The clamping unit includes a connecting rod, a clamping sleeve, and a clamping sleeve. The connecting rod drives the clamping sleeve to move up and down along a groove on the column. The upper part of the clamping sleeve is a guide part, and the lower part is the clamping part. In use, the rebound hammer to be calibrated is passed through the inner hole of the clamping sleeve with the impact rod facing downward. Rotating the clamping sleeve causes multiple clamping claws to converge towards the center, clamping and limiting the rebound hammer at the center position. Then, the pressure rod is rotated downward to press against the tail of the rebound hammer. Continuing to rotate the pressure rod pushes the rebound hammer downward, and the impact rod presses against the upper surface of the steel anvil to complete one impact.

[0026] In this application, the pressure bar and clamping unit work together to limit the rebound hammer, preventing it from tipping or tilting during calibration and improving calibration accuracy. The lower end of the clamping sleeve is divided into multiple clamping claws by a notch; rotating the clamping sleeve adjusts the convergence of the claws, accommodating rebound hammers of different sizes. When clamping the rebound hammer, the clamping sleeve holds the end of the hammer, and the pressure bar presses against the tail. This does not affect the readings of pointer-type rebound hammers or interfere with the display screen of digital rebound hammers. It is suitable for both pointer-type and digital rebound hammers, offering wider applicability and greater versatility, meeting the calibration needs of metrology laboratories for different models and specifications of rebound hammers. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram illustrating the installation of a metrological testing clamping device and a pointer-type rebound hammer, provided for embodiments of this application;

[0029] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0030] Figure 3 A half-sectional view of a metrological testing clamping device and a pointer-type rebound hammer provided in the embodiments of this application;

[0031] Figure 4 This is a half-sectional view of the clamping sleeve and the pressing sleeve in the embodiments of this application;

[0032] Figure 5 This is an exploded assembly view of the connecting rod, clamping sleeve, and pressure sleeve in an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the structure of a metrology and testing clamping device provided in an embodiment of this application;

[0034] Figure 7 A schematic diagram illustrating the installation of a metrological testing clamping device and a digital display rebound hammer, provided for embodiments of this application;

[0035] Explanation of reference numerals in the attached figures:

[0036] 10. Support unit; 11. Base; 12. Column; 121. Guide rod; 122. Second spring; 13. Support plate; 14. Steel anvil; 20. Clamping unit; 21. Connecting rod; 22. Clamping sleeve; 221. Guide part; 222. Clamping part; 223. Notch; 224. Rubber protective pad; 225. Slot; 23. Pressing sleeve; 231. Boss; 232. Grip texture; 30. Pressure rod; 31. Handwheel; 32. Pressure plate; 40. Reversing unit; 41. Rail; 42. Rotating ring; 43. Clamping rod; 44. First spring; 50. Pressure sensor. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0038] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0039] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0042] Please refer to the following: Figures 1 to 7 The following describes a metrological testing clamping device provided in an embodiment of this application.

[0043] Please see Figures 1 to 5The metrological clamping device provided in this application includes a support unit 10, a clamping unit 20, and a pressure rod 30. The support unit 10 includes a base 11, a column 12 vertically disposed on the base 11, and a support plate 13 disposed at the top of the column 12. The base 11 is used to place a steel anvil 14. The column 12 has a vertical groove. The support plate 13 has a vertically penetrating adjustment hole, which corresponds vertically to the base 11. The clamping unit 20 includes a connecting rod 21, a clamping sleeve 22, and a pressing sleeve 23. The clamping sleeve 22 is a hollow annular shape and has a guide portion 221 and a clamping portion 222. The guide portion 221 is located above the clamping portion 222. The clamping portion 222 is funnel-shaped. The clamping part 222 has multiple notches 223 evenly spaced along its circumference. The notches 223 extend upward from the bottom of the clamping part 222, and a clamping claw is formed between two adjacent notches 223. One end of the connecting rod 21 is connected to the upper part of the guide part 221, and the other end is slidably engaged with the slide groove. The clamping sleeve 23 is fitted around the outer circumference of the clamping sleeve 22. The upper inner wall of the clamping sleeve 23 is threadedly engaged with the outer wall of the guide part 221. The lower inner wall of the clamping sleeve 23 is provided with an annular boss 231, which abuts against the outer wall of the clamping part 222. The pressure rod 30 is threadedly engaged with the adjusting hole. The surface of the boss 231 that contacts the clamping part 222 is a conical surface.

[0044] Compared with the prior art, the beneficial effects of the metrological testing clamping device provided in this application embodiment are:

[0045] This application provides a metrological testing clamping device comprising a support unit 10, a clamping unit 20, and a pressure rod 30. The support unit 10 includes a base 11, a column 12, and a support plate 13. A steel anvil 14 is fixed on the base 11, and the pressure rod 30 is threadedly engaged with the support plate 13. The clamping unit 20 includes a connecting rod 21, a clamping sleeve 22, and a clamping sleeve 23. The connecting rod 21 drives the clamping sleeve 22 to move up and down along a groove on the column 12. The upper part of the clamping sleeve 22 is a guide part 221, and the lower part is a clamping part 222. In use, the rebound spring to be calibrated is passed through the inner hole of the clamping sleeve 22 with the spring bar facing downward. The clamping sleeve 23 is rotated to bring multiple clamping claws together towards the center, clamping and limiting the rebound spring at the center position. Then, the pressure rod 30 is rotated downward to press against the tail of the rebound spring. Continue rotating the pressure rod 30 to push the rebound device downwards, and the impact rod presses against the upper surface of the steel anvil 14 to complete one impact.

[0046] In this embodiment, the pressure rod 30 and the clamping unit 20 work together to limit the rebound hammer, preventing it from tipping or tilting during calibration and improving the accuracy of the calibration. The lower end of the clamping sleeve 22 is divided into multiple clamping claws by a notch 223. Rotating the pressure sleeve 23 adjusts the convergence of the clamping claws, adapting to rebound hammers of different sizes. When clamping the rebound hammer, the clamping sleeve 22 clamps the end of the rebound hammer, and the pressure rod 30 presses against the tail of the rebound hammer. This does not affect the reading of the pointer-type rebound hammer, nor does it interfere with the display screen of the digital rebound hammer. It is suitable for both pointer-type and digital rebound hammers, offering wider applicability and greater versatility, meeting the calibration needs of metrology laboratories for different models and specifications of rebound hammers.

[0047] The support unit 10 includes a base 11, a column 12 and a support plate 13. The base 11 is used to support the steel anvil 14. The base 11 should be made of a material with high hardness and rigidity, such as cast iron. The support plate 13 and the column 12 can be made of metal or non-metal and are connected and fixed by means of bonding, welding, screw connection or other methods.

[0048] The column 12 has a groove for the connecting rod 21 to move up and down. The cross-sectional shape of the groove can be a common groove shape such as square, dovetail, or T-shape. The top of the support plate 13 has a vertical through-hole adjustment hole. The adjustment hole is a threaded hole. The adjustment hole can be obtained by drilling and tapping threads on the support plate 13, or by fixing a nut shape on the support plate 13, with the inner hole of the nut forming the adjustment hole.

[0049] The clamping unit 20 includes a connecting rod 21, a clamping sleeve 22, and a pressing sleeve 23. The clamping sleeve 22 is fitted onto the outer periphery of the rebound spring. The connecting rod 21 is connected to the clamping sleeve 22 and can move up and down along the slide groove, driving the clamping sleeve 22 and the rebound spring to move up and down. The pressing sleeve 23 is used to adjust the convergence degree of the multiple clamping claws on the clamping sleeve 22 to adapt to rebound springs of different diameters.

[0050] The clamping sleeve 22 can be made of metal (such as spring steel) or non-metal (such as PVC, PP, etc.). The material of the clamping claws should have a certain elastic strength, be able to undergo elastic deformation, and return to its original shape after the external force is removed. The upper part of the clamping sleeve 22 is cylindrical and has external threads, while the lower part of the clamping sleeve 22 is inverted conical and is divided into multiple clamping claws by multiple notches 223.

[0051] The upper part of the clamping sleeve 23 is threaded into the clamping sleeve 22, and the lower part of the clamping sleeve 23 abuts against the outer wall of the clamping claw via an annular boss 231. Rotating the clamping sleeve 23 upwards causes the boss 231 to move upwards, pushing multiple clamping claws towards the center to clamp the end conical surface of the spring. Rotating the clamping sleeve 23 downwards causes the boss 231 to move downwards, and the clamping claws return to their original shape under their own elastic force.

[0052] The pressure rod 30 is threaded into the adjusting hole. Rotating the pressure rod 30 allows it to move up and down. The pressure rod 30 presses against the tail of the rebound hammer and pushes the rebound hammer downward against the steel anvil 14 to complete one impact. After the impact is completed, the corresponding value is recorded. The rotation of the pressure rod 30 can be driven manually or by other power equipment (such as an electric motor).

[0053] When driven by an electric motor, a drive wheel is provided on the support plate 13, and the drive wheel rotates with the support plate 13. The drive wheel has an inner hole, which is the aforementioned adjustment hole, and the pressure rod 30 is threadedly engaged with the adjustment hole. A gear ring is provided on the outer circumference of the drive wheel, and the output shaft of the electric motor is driven by the gear meshing with the gear ring. The pressure rod 30 is raised or lowered by changing the rotation direction of the electric motor.

[0054] Please see Figure 4 and Figure 5 In some possible embodiments, the inner wall of each gripper is provided with a rubber protective pad 224, which contacts the outer wall of the rebounder. The rubber protective pad 224 can increase the friction to prevent the rebounder from shaking, and can also prevent the surface of the rebounder from being dented due to excessive clamping force.

[0055] To prevent stress concentration and cracking at the notch 223, the upper part of the notch 223 has a circular slot 225. Compared with a right angle, the circular slot 225 can eliminate the stress at the upper part of the notch 223 and prevent cracks from appearing due to stress when the clamping claw deforms.

[0056] Please see Figure 1 , Figure 4 , Figure 5 and Figure 6 In some possible embodiments, the outer surface of the clamping sleeve 23 is provided with gripping texture 232 to facilitate gripping. Depending on the requirements, the gripping texture 232 can be a groove, pattern, or other structure.

[0057] The "Verification Procedure for Rebound Hammers (JJG817-2011)" stipulates that after completing one test, the impact rod should be rotated 90° and the test should be performed again. However, in actual operation, the impact rod is a round metal rod with a smooth surface without scratches. Since there is no reference structure on the surface of the impact rod, the operator can only rotate the impact rod by feel, and the actual rotation angle may be significantly different from 90°.

[0058] To improve the accuracy of the firing lever rotation, please refer to... Figures 1 to 3 , Figure 6 and Figure 7 In some possible embodiments, the metrological clamping device further includes a reversing unit 40, which includes a track 41, a rotating ring 42, clamping rods 43, and first springs 44. The track 41 is arranged on the upper surface of the anvil 14 and is annular. The rotating ring 42 is slidably fitted to the track 41 and has two opposing clamping holes. The two clamping rods 43 are slidably disposed in the corresponding clamping holes. The two first springs 44 are respectively sleeved on the corresponding clamping rods 43, with one end of the first spring 44 abutting against the outer wall of the rotating ring 42 and the other end abutting against the corresponding clamping rod 43.

[0059] In this embodiment, the reversing unit 40 includes a track 41, a rotating ring 42, clamping rods 43, and a first spring 44. The track 41 is set on the upper surface of the anvil 14 by magnetic attraction or other means. The track 41 is annular or semi-annular. The rotating ring 42 can rotate along the track 41 and has a protrusion that slides with the track 41. The rotatable angle of the rotating ring 42 is greater than or equal to 90°. Two clamping rods 43 are symmetrically arranged on the rotating ring 42 about the center position at 180°. The first spring 44 is sleeved on each of the two clamping rods 43. When it is necessary to rotate the spring rod, the two clamping rods 43 can be clamped by two fingers (such as thumb and index finger, or thumb and middle finger) respectively, so that the two clamping rods 43 are close to each other and abut against the spring rod in the middle position. Then, the operator rotates the wrist to drive the reversing unit 40 and the spring rod to rotate together. During rotation, the clamping rods 43 or the rotating ring 42 can be used as a reference to help the operator roughly estimate the rotation angle of the spring rod and reduce the deviation caused by the rotation angle.

[0060] To further improve the accuracy of rotation, a scale can be set on track 41 to display the rotation angle. The operator can calculate the rotation angle by checking the corresponding scale before and after rotation.

[0061] A rubber anti-slip pad can be provided at the end of the clamping rod 43 that abuts against the striking rod to increase friction. After rotation is complete, the reversing unit 40 can be removed to prevent it from affecting the accuracy of the results. Of course, the reversing unit 40 can also be fixed to the surface of the anvil 14 without affecting the test results.

[0062] Please see Figure 1 and Figure 2In some possible embodiments, the rotating ring 42 is a C-shaped ring, and the clamping rod 43 is disposed opposite to the two ends of the C-shaped ring. The metering and testing clamping device also includes a pressure sensor 50 detachably disposed on the upper surface of the steel anvil 14. The pressure sensor 50 is located at the center of the track 41, and the signal line of the pressure sensor 50 extends from the notch of the C-shaped ring and is connected to the corresponding instrument equipment.

[0063] The pressure sensor 50 is used to detect the impact force generated by the rebound hammer. The pressure sensor 50 is detachable and can be removed when it is not necessary to detect the impact force. The pressure sensor 50 can be a commercially available force measuring product, such as a piezoelectric or capacitive type.

[0064] Please see Figure 1 , Figure 3 , Figure 6 and Figure 7 In some possible embodiments, a handwheel 31 is connected to the top of the pressure rod 30. The handwheel 31 is connected and fixed to the pressure rod 30 by means of welding, bolt connection, key connection, etc., so as to facilitate the rotation of the pressure rod 30.

[0065] Please see Figure 3 In some possible embodiments, a vertical guide rod 121 is provided in the slide groove, and the connecting rod 21 is slidably engaged with the guide rod 121. A second spring 122 is sleeved on the guide rod 121. One end of the second spring 122 abuts against the base 11, and the other end of the second spring 122 abuts against the connecting rod 21. The guide rod 121 guides the connecting rod 21, and the second spring 122 provides an elastic force for the connecting rod 21 to move upward and reset.

[0066] Please see Figure 3 In some possible embodiments, the lower end of the pressure rod 30 is rotatably fitted with a pressure plate 32. When the pressure rod 30 rotates, the pressure plate 32 presses against the tail end of the rebound spring and does not rotate with the pressure rod 30.

[0067] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A metrology inspection clamping device, characterized by, include: The support unit (10) includes a base (11), a column (12) vertically disposed on the base (11), and a support plate (13) disposed on the top of the column (12). The base (11) is used to place the steel anvil (14). The column (12) has a vertical groove. The support plate (13) has a vertical through-hole. The adjustment hole corresponds vertically to the base (11). The clamping unit (20) includes a connecting rod (21), a clamping sleeve (22), and a pressing sleeve (23). The clamping sleeve (22) is a hollow ring and has a guide portion (221) and a clamping portion (222). The guide portion (221) is located above the clamping portion (222). The clamping portion (222) is funnel-shaped and has multiple notches (223) evenly spaced along its circumference. The notches (223) extend upward from the bottom of the clamping portion (222). A clamping claw is formed between two adjacent notches (223). One end of the connecting rod (21) is connected to the upper part of the guide (221), and the other end is slidably engaged with the groove. The clamping sleeve (23) is sleeved on the outer periphery of the clamping sleeve (22). The upper inner wall of the clamping sleeve (23) is threadedly engaged with the outer wall of the guide (221). The lower inner wall of the clamping sleeve (23) is provided with an annular boss (231), and the boss (231) abuts against the outer wall of the clamping part (222). The pressure rod (30) is threaded into the adjustment hole.

2. A metrology inspection clamping device according to claim 1, wherein, Each of the gripping claws has a rubber protective pad (224) on its inner wall.

3. The metrology inspection clamping device of claim 1, wherein, The upper part of the notch (223) has a circular slot (225).

4. The metrology inspection clamping device of claim 1, wherein, The outer surface of the clamping sleeve (23) is provided with gripping texture (232).

5. The metrology inspection clamping device of claim 1, wherein, The metering and testing clamping device further includes a reversing unit (40), which includes: A track (41) is provided on the upper surface of the steel anvil (14), and the track (41) is circular; A rotating ring (42) is slidably fitted onto the track (41), and two opposing clamping holes are provided on the rotating ring (42); Two clamping rods (43) are slidably disposed within the corresponding clamping holes; and Two first springs (44) are respectively sleeved on the corresponding clamping rods (43). One end of the first spring (44) abuts against the outer wall of the rotating ring (42), and the other end abuts against the corresponding clamping rod (43).

6. A metrology inspection clamping device according to claim 5, wherein, The rotating ring (42) is a C-shaped ring, and the clamping rod (43) is disposed opposite to the two ends of the C-shaped ring. The metering and detection clamping device also includes a pressure sensor (50) detachably disposed on the upper surface of the steel anvil (14). The pressure sensor (50) is located at the center of the track (41), and the signal line of the pressure sensor (50) extends from the notch of the C-shaped ring.

7. A metrology inspection clamping device according to claim 6, wherein, A handwheel (31) is connected to the top of the pressure rod (30).

8. The metrology inspection clamping device of claim 1, wherein, A vertical guide rod (121) is provided in the groove. The connecting rod (21) slides with the guide rod (121). A second spring (122) is sleeved on the guide rod (121). One end of the second spring (122) abuts against the base (11), and the other end of the second spring (122) abuts against the connecting rod (21).

9. The metrology inspection clamping device of claim 1, wherein, The lower end of the pressure rod (30) is rotatably fitted with a pressure plate (32).

10. The metrology inspection clamping device of claim 1, wherein, The surface of the boss (231) that contacts the clamping part (222) is a conical surface.

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