Metering calibration device for mechanical instrument
Through the rotating frame and positioning switching module integrating tension, pressure and torque sensors, the problem that existing devices cannot adapt to calibration of multiple types of mechanical instruments is solved, and a fast and stable calibration process is achieved, which improves calibration efficiency.
Patent Information
- Application Number
- CN202510523781.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2025-07-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing metrological calibration devices cannot adapt to calibration of multiple types of mechanical instruments at the same time, resulting in inefficient calibration and frequent replacement of calibration devices or transfer of mechanical instruments.
A rotating frame integrating tension sensor, pressure sensor and torque sensor is designed to achieve rapid switching through the positioning switching module, combining the safety module and leveling module to ensure the stability and accuracy of the calibration process.
The rapid calibration of different types of mechanical instruments is achieved, which avoids frequent replacement of calibration devices and instrument transfer, and improves calibration convenience and efficiency.
Smart Images
Figure CN120253056A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of mechanical measurement calibration, and particularly relates to a measurement calibration device for mechanical instruments. Background Art
[0002] With the development of society, the measurement calibration devices for mechanical instruments have become ubiquitous devices, and mechanical instruments are generally referred to as instruments for measuring mechanical quantities such as mass, pressure, tensile force, vacuum, hardness, capacity, density, torque, rotational speed, flow rate, vibration, and gravitational acceleration.
[0003] In mechanical measurement calibration, calibration of tensile force, pressure, and torque is the most common. However, in existing measurement calibration devices, when calibrating one type of mechanical instrument and then calibrating another type of mechanical instrument, it is necessary to replace the calibration device or transfer the mechanical instrument to the position of the required calibration instrument, which is extremely inconvenient and has a great impact on the calibration efficiency of mechanical instruments. Summary of the Invention
[0004] The present invention discloses a measurement calibration device for mechanical instruments, aiming to solve the technical problem that existing measurement calibration devices in the background art cannot cope with calibration of multiple types of mechanical instruments.
[0005] A measurement calibration device for mechanical instruments proposed by the present invention includes a mounting frame;
[0006] A round rod, the outer part of the round rod is movably connected to the inner wall of a round hole opened on the mounting frame;
[0007] A rotating frame, a round groove is opened on the rotating frame, the inner wall of the round groove is fixedly connected to the outer part of the round rod, a tensile force sensor, a pressure sensor, and a torque sensor are fixedly connected to the upper side of the rotating frame, and the rotating frame is located inside the mounting frame;
[0008] A positioning and switching module, located on the mounting frame, the positioning and switching module includes a round shaft, the upper side of the round shaft is fixedly connected to the bottom of the round rod, an insurance module is arranged on the outer part of the round shaft, and the positioning and switching module is used to complete the switching action of the tensile force sensor, the pressure sensor, and the torque sensor, so as to realize the rapid switching of the calibration equipment;
[0009] The insurance module is used to prevent the rotating frame from slipping due to excessive force.
[0010] In a preferred embodiment, a first gear is provided on the outer side of the circular shaft, and a rack is snap-connected to the outer side of the first gear. The upper side of the first gear is movably connected to the bottom of the mounting frame. A locking ring is provided on the outer side of the first gear, and the side of the inner wall of the locking ring opposite to the rack is fixedly connected. The bottom of the circular shaft is fixedly connected with a triangular handle. The outer side of the round rod is movably connected with a top cover. An annular groove is formed in the top cover, and a receiving frame is fixedly connected in the annular groove. A notch is formed in the receiving frame, and the notch is located above the torque sensor. A guiding buckle is slidably connected to the outer side of the locking ring. The upper side of the guiding buckle is fixedly connected to the bottom of the mounting frame. Two symmetric second springs are fixedly connected to the outer side of the guiding buckle. The ends of the second springs away from the guiding buckle are fixedly connected to the inner wall of the locking ring. Three rectangular openings are formed in the bottom of the rotating frame at equal circumferential intervals. Two symmetric first springs are fixedly connected to the inner walls of the tops of the rectangular openings. The bottoms of the two first springs on the same side are fixedly connected to the same pressing plate. The outer sides of the pressing plates are slidably connected to the inner walls of the rectangular openings on the same side. Three equally spaced balls are slidably connected in each of the rectangular openings. Three equally spaced fitting grooves are formed in the inner wall of the bottom of the mounting frame. The inner walls of the fitting grooves are in contact with the outer sides of the three balls on the same side, and the balls are all located below the pressing plates.
[0011] In a preferred embodiment, the insurance module includes a blocking rod located on the outer side of the first gear. A stabilizing seat and a locking seat are respectively arranged at two ends of the blocking rod. Circular openings are formed in the outer sides of the stabilizing seat and the blocking rod, and the same rotating shaft is movably connected to the inner walls of the circular openings. A coil spring is fixedly connected to the outer side of the rotating shaft. The end of the coil spring away from the rotating shaft is fixedly connected to an annular frame. The side of the annular frame opposite to the stabilizing seat is fixedly connected. The side of the blocking rod opposite to the locking ring is in contact. A fine hole is formed in the locking seat, and a bolt is slidably connected in the fine hole. A groove is formed in the end of the blocking rod away from the stabilizing seat, and the outer side of the bolt is snap-connected to the inner wall of the groove. A third spring is fixedly connected to the outer side of the bolt. The end of the third spring away from the bolt is fixedly connected to the outer side of the locking seat. A leveling module is arranged below the blocking rod.
[0012] In a preferred embodiment, the leveling module is located below the mounting frame and includes a lead screw. A connecting plate is disposed outside the three lead screws. Ball heads are fixedly connected to the upper sides of the lead screws, and ball seats are disposed outside the ball heads. Three circular openings that are circumferentially and equally spaced are formed in the connecting plate. The inner walls of the circular openings are rotationally connected to the outside of the lead screws on the same side through external threads. External gears are disposed outside the lead screws. The upper sides of the external gears are movably connected to the bottom of the connecting plate, and the upper sides of the ball seats are fixedly connected to the bottom of the mounting frame. Inner tooth rings are snap-fitted outside the three external gears. Two symmetric short rods are fixedly connected to the upper sides of the inner tooth rings. A plurality of symmetric thin holes are formed in the connecting plate, and the inner walls of the thin holes are slidably connected to the outside of the short rods. A support rod is fixedly connected to the bottom of the connecting plate, and a base is fixedly connected to the bottom of the support rod. Three rivets that are circumferentially and equally spaced are disposed on the base. The upper sides of two short rods on the same side are fixedly connected to the same blocking ring. The blocking rings are located outside the lead screws on the same side. Spring fours are disposed outside the short rods. The upper ends of the spring fours are fixedly connected to the bottom of the blocking ring, and the bottoms are fixedly connected to the upper side of the connecting plate. External knobs are disposed on the lead screws, and the bottoms of the knobs are movably connected to the upper side of the connecting plate.
[0013] As can be seen from the above, a metering and calibration device for a mechanical instrument provided by the present invention can integrate a tensile sensor, a pressure sensor, and a torque sensor, thereby realizing rapid switching, greatly improving the convenience of instrument calibration, and avoiding the situation of replacing the calibration instrument or moving the mechanical instrument between different calibration devices when calibrating different types of mechanical instruments, enhancing the applicability of the device, and improving the calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 FIG. 1 is an overall structural schematic diagram of a metering and calibration device for a mechanical instrument proposed by the present invention;
[0015] Figure 2 FIG. 2 is a sectional structural schematic diagram of a metering and calibration device for a mechanical instrument proposed by the present invention;
[0016] Figure 3 FIG. 3 is a structural schematic diagram of a positioning and switching module of a metering and calibration device for a mechanical instrument proposed by the present invention;
[0017] Figure 4 FIG. 4 is a structural schematic diagram of a rotating frame of a metering and calibration device for a mechanical instrument proposed by the present invention;
[0018] Figure 5 FIG. 5 is a structural schematic diagram of a locking ring of a metering and calibration device for a mechanical instrument proposed by the present invention;
[0019] Figure 6Schematic diagram of the insurance module structure of a metrological calibration device for mechanical instruments proposed by the present invention;
[0020] Figure 7 Schematic diagram of the leveling module structure of a metrological calibration device for mechanical instruments proposed by the present invention.
[0021] In the figure: 1, mounting frame; 2, top cover; 3, receiving frame; 4, support rod; 5, base; 6, rivet; 7, positioning and switching module; 701, locking ring; 702, round shaft; 703, spring I; 704, pressing plate; 705, ball; 706, fitting groove; 707, gear I; 708, rack; 709, guiding buckle; 710, spring II; 711, triangular handle; 8, insurance module; 801, blocking rod; 802, stabilizing seat; 803, rotating shaft; 804, torsion spring; 805, annular frame; 806, locking seat; 807, bolt; 808, spring III; 9, leveling module; 901, lead screw; 902, gear II; 903, internal gear ring; 904, knob; 905, blocking ring; 906, spring IV; 907, ball head; 908, ball seat; 10, connecting plate; 11, round rod; 12, rotating frame; 13, tension sensor; 14, pressure sensor; 15, torque sensor. Detailed implementation manners
[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0023] A metrological calibration device for mechanical instruments disclosed by the present invention is mainly applied to scenarios where existing metrological calibration devices cannot cope with the calibration of multiple types of mechanical instruments.
[0024] Refer to Figures 1-7 , a metrological calibration device for mechanical instruments, including a mounting frame 1;
[0025] A round rod 11, the outer part of the round rod 11 is rotationally connected to the inner wall of the round hole opened on the mounting frame 1 through a bearing;
[0026] A rotating frame 12, a round groove is opened on the rotating frame 12, the inner wall of the round groove is bolted to the outer part of the round rod 11, the upper side of the rotating frame 12 is bolted with a tension sensor 13, a pressure sensor 14 and a torque sensor 15, and the rotating frame 12 is located inside the mounting frame 1;
[0027] The positioning and switching module 7 is located on the installation frame 1. The positioning and switching module 7 includes a circular shaft 702. The upper side of the circular shaft 702 is bolted to the bottom of the circular rod 11. An insurance module 8 is arranged outside the circular shaft 702. The positioning and switching module 7 is used to complete the switching action of the tension sensor 13, the pressure sensor 14, and the torque sensor 15, so as to achieve the rapid switching of the calibration device;
[0028] The insurance module 8 is used to prevent the rotating frame 12 from slipping due to excessive force.
[0029] Specifically, when calibrating mechanical instruments such as pressure, tension, and torque, the insurance module 8 is used to release the lock on the positioning and switching module 7, so that the positioning and switching module 7 can drive the circular rod 11 to rotate, so that the rotating frame 12 can rotate and switch the tension sensor 13, the pressure sensor 14, and the torque sensor 15. Thus, the device can complete the calibration of the mechanical instrument. After the switching is completed, the insurance module 8 is used again to lock the positioning and switching module 7; The device can integrate the tension sensor 13, the pressure sensor 14, and the torque sensor 15 by using the positioning and switching module 7, so as to achieve rapid switching, greatly improving the convenience of instrument calibration, and avoiding the situation of replacing the calibration instrument or moving the mechanical instrument between different calibration devices when calibrating different types of mechanical instruments, enhancing the applicability of the device and improving the calibration efficiency.
[0030] Refer to Figure 3 、 Figure 4 and Figure 5, in a preferred embodiment, a first gear 707 is provided outside the circular shaft 702, and a rack 708 is clamped outside the first gear 707. The upper side of the first gear 707 is rotatably connected to the bottom of the mounting frame 1 through a bearing. A locking ring 701 is provided outside the first gear 707. One side of the inner wall of the locking ring 701 opposite to the rack 708 is connected by a bolt. And a triangular handle 711 is connected to the bottom of the circular shaft 702 by a bolt. The top cover 2 is rotatably connected to the outside of the round rod 11 through a bearing. An annular groove is provided on the top cover 2. A receiving frame 3 is connected to the annular groove by a bolt. A notch is provided on the receiving frame 3, and the notch is located above the torque sensor 15. A guide buckle 709 is slidably connected to the outside of the locking ring 701. The upper side of the guide buckle 709 is connected to the bottom of the mounting frame 1 by a bolt. Two symmetric second springs 710 are connected to the outside of the guide buckle 709 by bolts. One end of the second spring 710 away from the guide buckle 709 is connected to the inner wall of the locking ring 701 by bolts. And three rectangular openings are provided on the bottom of the rotating frame 12 at circumferentially equidistant intervals. Two symmetric first springs 703 are connected to the inner walls of the tops of the rectangular openings by bolts. The bottoms of the two first springs 703 on the same side are connected to the same pressing plate 704 by bolts. The outside of the pressing plate 704 is slidably connected to the inner wall of the rectangular opening on the same side. And three equally spaced balls 705 are slidably connected in each rectangular opening. Three circumferentially equidistant fitting grooves 706 are provided on the inner wall of the bottom of the mounting frame 1. The inner walls of the fitting grooves 706 are in contact with the outside of the three balls 705 on the same side. And the balls 705 are all located below the pressing plate 704.
[0031] Specifically, when calibrating different types of mechanical instruments, gently push the locking ring 701 against the elastic force of the second spring 710 to release the locking of the first gear 707 by the rack 708 on the locking ring 701. Rotate the triangular handle 711, and the triangular handle 711 drives the circular shaft 702 connected to the round rod 11 to rotate, so that the rotating frame 12 rotates. The balls 705 are pushed by the rotating force, rotate out of the fitting groove 706 and retract against the elastic force of the first spring 703 under the pressure of the inner wall of the bottom of the mounting frame 1. After selecting the tensile sensor 13, the pressure sensor 14 or the torque sensor 15, the selected calibration instrument will appear at the notch on the receiving frame 3. At this time, the balls 705 will re-enter the fitting groove 706. Release the locking ring 701. Under the pulling force of the second spring 710, the rack 708 and the first gear 707 are locked again, and the circular shaft 702 stops rotating.
[0032] In a specific application scenario, the positioning switching module 7 is mainly applicable to the positioning switching link during the positioning switching process. That is, the positioning switching module 7 can use the locking ring 701, the rack 708, and the first gear 707 to enable the device to complete the rotational adjustment of the rotating frame 12. After the adjustment is completed, it effectively ensures that the position of the rotating frame 12 after rotation will not change, avoiding the deviation of the position of the calibration equipment on the rotating frame 12, thereby affecting the metrological calibration work. By using the balls 705 and the fitting grooves 706, after the rotating frame 12 completes the switching of the calibration instrument, the working position of the instrument can be accurately positioned. The resistance generated when the balls 705 disengage from the fitting grooves 706 and the fitting sound generated when the balls 705 enter the fitting grooves 706 are used to prompt the user of the position and working state of the rotating frame 12, greatly improving the convenience of use.
[0033] Referring Figure 6 , in a preferred embodiment, the insurance module 8 includes a position blocking rod 801 located outside the first gear 707. At both ends of the position blocking rod 801, a stable seat 802 and a locking seat 806 are respectively provided. Circular openings are formed on the outer parts of the stable seat 802 and the position blocking rod 801. The inner walls of the circular openings are rotatably connected to the same rotating shaft 803 through bearings. A torsion spring 804 is bolted to the outside of the rotating shaft 803. One end of the torsion spring 804 away from the rotating shaft 803 is bolted to an annular frame 805. The side of the annular frame 805 opposite to the stable seat 802 is bolted. The side of the position blocking rod 801 opposite to the locking ring 701 is in contact. A fine hole is formed in the locking seat 806. A plug pin 807 is slidably connected in the fine hole. A groove is formed at one end of the position blocking rod 801 away from the stable seat 802. The inner wall of the groove is clamped with the outside of the plug pin 807. A third spring 808 is bolted to the outside of the plug pin 807. One end of the third spring 808 away from the plug pin 807 is bolted to the outside of the locking seat 806. A leveling module 9 is provided below the position blocking rod 801.
[0034] Specifically, after the positioning switching module 7 completes the adjustment of the rotating frame 12, the position blocking rod 801 is released. Under the torque of the torsion spring 804, the position blocking rod 801 rotates into the locking seat 806, pulling out the plug pin 807 against the tension of the third spring 808, enabling the position blocking rod 801 to completely enter the locking seat 806. The plug pin 807 is released. Under the elastic force of the third spring 808, the plug pin 807 returns to its original position and passes through the groove on the position blocking rod 801, thereby locking the position blocking rod 801 on the locking seat 806. At this time, the outside of the position blocking rod 801 will closely adhere to the outside of the locking ring 701, thereby preventing the locking ring 701 from moving in the unlocking direction.
[0035] In a specific application scenario, the insurance module 8 is mainly applicable to the insurance link in the insurance process. That is, the insurance module 8 can effectively prevent the movement of the locking ring 701 by using the blocking rod 801 and the bolt 807, thereby avoiding the situation that when the torque sensor 15 performs torque calibration, excessive torque breaks through the locking limit of the rack 708 and the first gear 707, causing the forced movement of the locking ring 701, and ensuring the normal progress of the calibration work.
[0036] Referring to Figure 7 , in a preferred embodiment, the leveling module 9 is located below the mounting frame 1 and includes a lead screw 901. The same connecting plate 10 is arranged outside the three lead screws 901. Ball heads 907 are connected to the upper sides of the lead screws 901 by bolts. Ball seats 908 are arranged outside the ball heads 907. Three circular openings evenly distributed in a circumferential manner are formed in the connecting plate 10. The inner walls of the circular openings are rotationally connected to the outside of the lead screws 901 on the same side through external threads. Gear two 902 is arranged outside each of the lead screws 901. The upper sides of the gear two 902 are rotationally connected to the bottom of the connecting plate 10 through bearings, and the upper sides of the ball seats 908 are connected to the bottom of the mounting frame 1 by bolts; Inner tooth rings 903 are clamped outside the three gear two 902. Two symmetric short rods are connected to the upper sides of the inner tooth rings 903 by bolts, and a plurality of symmetric fine holes are formed in the connecting plate 10. The inner walls of the fine holes are slidably connected to the outside of the short rods. A support rod 4 is connected to the bottom of the connecting plate 10 by bolts. A base 5 is connected to the bottom of the support rod 4 by bolts. Three rivets 6 evenly distributed in a circumferential manner are arranged on the base 5; The upper sides of the two short rods on the same side are connected to the same blocking ring 905 by bolts. The blocking rings 905 are all located outside the lead screws 901 on the same side. Spring four 906 is arranged outside the short rods. The upper ends of the spring four 906 are connected to the bottom of the blocking ring 905 by bolts, and the bottoms are connected to the upper side of the connecting plate 10 by bolts. A knob 904 is arranged outside each of the lead screws 901. The bottoms of the knobs 904 are rotationally connected to the upper side of the connecting plate 10 through bearings.
[0037] Specifically, before the calibration work is carried out, press down the blocking ring 905 against the elastic force of the spring four 906, so that the blocking ring 905 drives the inner tooth ring 903 to descend, thereby releasing the locking of the gear two 902. Rotate the knob 904 to move the lead screw 901 up and down on the connecting plate 10, so that the ball head 907 slides in the ball seat 908, thereby changing the angle of the mounting frame 1 connected to the ball seat 908. By adjusting the three lead screws 901 of the equilateral triangle, the lead screw 901 is in a horizontal position. After the adjustment is completed, release the blocking ring 905 to lock the gear two 902 by the inner tooth ring 903 again.
[0038] In a specific application scenario, the leveling module 9 is mainly applicable to the leveling link during the leveling process. That is, the leveling module 9 uses the movement of the lead screw 901 on the connecting plate 10 to make the ball head 907 slide on the ball seat 908, thereby realizing the angle adjustment of the mounting frame 1, so that the calibration instrument on the mounting frame 1 can always ensure that the force application direction does not deflect during calibration, thereby improving the accuracy of metrological calibration.
[0039] Working principle: Before the calibration work is carried out, press down the blocking ring 905 against the elastic force of the spring four 906, so that the blocking ring 905 drives the internal gear ring 903 to descend, thereby releasing the locking of the gear two 902. Rotate the knob 904 to make the lead screw 901 move up and down on the connecting plate 10, so that the ball head 907 slides in the ball seat 908, so that the angle of the mounting frame 1 connected to the ball seat 908 changes. By adjusting the three lead screws 901 of the equilateral triangle, the lead screw 901 is in a horizontal position. After the adjustment is completed, release the blocking ring 905 to make the internal gear ring 903 lock the gear two 902 again. When calibrating different types of mechanical instruments, gently push the locking ring 701 against the elastic force of the spring two 710, so that the rack 708 on the locking ring 701 releases the locking of the gear one 707. Rotate the triangular handle 711, and the triangular handle 711 drives the round shaft 702 connected to the round rod 11 to rotate, so that the rotating frame 12 rotates. The ball 705 is pushed by the rotating force, rotates out of the fitting groove 706 and retracts against the elastic force of the spring one 703 under the pressure of the inner wall of the bottom of the mounting frame 1. After selecting the tensile sensor 13, pressure sensor 14 or torque sensor 15, the selected calibration instrument will appear at the notch on the receiving frame 3. At this time, the ball 705 will re-enter the fitting groove 706. Release the locking ring 701, and under the pulling force of the spring two 710, the rack 708 and the gear one 707 are locked again, and the round shaft 702 stops rotating. After the positioning and switching module 7 completes the adjustment of the rotating frame 12, release the blocking rod 801. The blocking rod 801 rotates into the locking seat 806 under the torque of the coil spring 804, pulls out the plug pin 807 against the pulling force of the spring three 808, so that the blocking rod 801 can completely enter the locking seat 806. Release the plug pin 807, and under the elastic force of the spring three 808, the plug pin 807 returns to its original position and passes through the groove on the blocking rod 801, thereby locking the blocking rod 801 on the locking seat 806. At this time, the outside of the blocking rod 801 will closely adhere to the outside of the locking ring 701, thereby preventing the locking ring 701 from moving in the unlocking direction. After completion, start calibrating the mechanical instrument.
[0040] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.
Claims
1. A metrological calibration device for mechanical instruments, characterized in that, Including an installation frame (1); A round rod (11), the outer part of the round rod (11) is movably connected to the inner wall of a round hole opened on the installation frame (1); A rotating frame (12), a round groove is opened on the rotating frame (12), the inner wall of the round groove is fixedly connected to the outer part of the round rod (11), a tension sensor (13), a pressure sensor (14) and a torque sensor (15) are fixedly connected to the upper side of the rotating frame (12), and the rotating frame (12) is located inside the installation frame (1); A positioning and switching module (7), located on the installation frame (1), the positioning and switching module (7) includes a round shaft (702), the upper side of the round shaft (702) is fixedly connected to the bottom of the round rod (11), an insurance module (8) is arranged outside the round shaft (702), and the positioning and switching module (7) is used to complete the switching action of the tension sensor (13), the pressure sensor (14) and the torque sensor (15) to realize the quick switching of the calibration equipment; The insurance module (8) is used to prevent the rotating frame (12) from slipping due to excessive force.
2. The metrological calibration device for a mechanical instrument according to claim 1, characterized in that, A first gear (707) is arranged outside the round shaft (702), and a rack (708) is clamped outside the first gear (707). The upper side of the first gear (707) is movably connected to the bottom of the installation frame (1). A locking ring (701) is arranged outside the first gear (707). The inner wall of the locking ring (701) is fixedly connected to the opposite side of the rack (708). A triangular handle (711) is fixedly connected to the bottom of the round shaft (702). The outer part of the round rod (11) is movably connected to a top cover (2). An annular groove is opened on the top cover (2), and a receiving frame (3) is fixedly connected inside the annular groove. A notch is opened on the receiving frame (3), and the notch is located above the torque sensor (15).
3. A metrological calibration device for a mechanical instrument according to claim 1, characterized in that, A guiding buckle (709) is slidably connected to the outside of the locking ring (701). The upper side of the guiding buckle (709) is fixedly connected to the bottom of the installation frame (1). Two symmetric second springs (710) are fixedly connected to the outside of the guiding buckle (709). One end of the second spring (710) away from the guiding buckle (709) is fixedly connected to the inner wall of the locking ring (701). Three rectangular openings are opened on the bottom of the rotating frame (12) at equal intervals in the circumferential direction.
4. A metrological calibration device for a mechanical instrument according to claim 3, characterized in that, Two symmetric first springs (703) are fixedly connected to the inner walls of the tops of the rectangular openings. The bottoms of the two first springs (703) on the same side are fixedly connected to the same pressing plate (704). The outside of the pressing plate (704) is slidably connected to the inner wall of the rectangular opening on the same side. Three equally spaced balls (705) are slidably connected inside the rectangular opening.
5. A metrological calibration device for a mechanical instrument according to claim 4, characterized in that, Three fitting grooves (706) are opened on the inner wall of the bottom of the installation frame (1) at equal intervals in the circumferential direction. The inner walls of the fitting grooves (706) are in contact with the outside of the three balls (705) on the same side, and the balls (705) are all located below the pressing plate (704).
6. A metrological calibration device for a mechanical instrument according to claim 1, characterized in that, The insurance module (8) includes a blocking rod (801) located outside the first gear (707). Stabilizing seats (802) and locking seats (806) are respectively arranged at both ends of the blocking rod (801). Circular openings are provided on the outer parts of the stabilizing seats (802) and the blocking rod (801), and the inner walls of the circular openings are both movably connected to the same rotating shaft (803). A torsion spring (804) is fixedly connected to the outer part of the rotating shaft (803). One end of the torsion spring (804) far away from the rotating shaft (803) is fixedly connected to an annular frame (805), and the side of the annular frame (805) opposite to the stabilizing seat (802) is fixedly connected. The side of the blocking rod (801) opposite to the locking ring (701) is in contact.
7. A metrological calibration device for a mechanical instrument according to claim 6, characterized in that, A fine hole is provided on the locking seat (806), and a bolt (807) is slidably connected in the fine hole. A groove is provided at one end of the blocking rod (801) far away from the stabilizing seat (802), and the inner wall of the groove is clamped with the outer part of the bolt (807). A third spring (808) is fixedly connected to the outer part of the bolt (807), and one end of the third spring (808) far away from the bolt (807) is fixedly connected to the outer part of the locking seat (806). A leveling module (9) is provided below the blocking rod (801).
8. A metrological calibration device for a mechanical instrument according to claim 7, characterized in that, The leveling module (9) is located below the mounting frame (1) and includes a lead screw (901). The outer parts of three lead screws (901) are provided with the same connecting plate (10). Ball heads (907) are fixedly connected to the upper sides of the lead screws (901). Ball seats (908) are arranged on the outer parts of the ball heads (907). Three circular openings are provided on the connecting plate (10) and are circumferentially and equidistantly distributed. The inner walls of the circular openings are rotationally connected to the outer parts of the lead screws (901) on the same side through external threads. Gear wheels two (902) are arranged on the outer parts of the lead screws (901). The upper sides of the gear wheels two (902) are movably connected to the bottom of the connecting plate (10), and the upper sides of the ball seats (908) are fixedly connected to the bottom of the mounting frame (1).
9. The metrological calibration device for a mechanical instrument according to claim 8, characterized in that, Inner gear rings (903) are clamped on the outer parts of the three gear wheels two (902). Two symmetric short rods are fixedly connected to the upper sides of the inner gear rings (903). A plurality of symmetric fine holes are provided on the connecting plate (10), and the inner walls of the fine holes are slidably connected to the outer parts of the short rods. A support rod (4) is fixedly connected to the bottom of the connecting plate (10), and a base (5) is fixedly connected to the bottom of the support rod (4). Three rivets (6) are arranged on the base (5) and are circumferentially and equidistantly distributed.
10. A metrological calibration device for a mechanical instrument according to claim 8, characterized in that, The upper sides of two short rods on the same side are fixedly connected to the same blocking ring (905). The blocking rings (905) are all located on the outer parts of the lead screws (901) on the same side. Fourth springs (906) are arranged on the outer parts of the short rods. The upper ends of the fourth springs (906) are fixedly connected to the bottoms of the blocking rings (905), and the bottoms are fixedly connected to the upper side of the connecting plate (10). Knobs (904) are arranged on the outer parts of the lead screws (901), and the bottoms of the knobs (904) are movably connected to the upper side of the connecting plate (10).