Metering calibration device for mechanical instrument

Abstract

The utility model belongs to the technical field of mechanical instrument calibration, and particularly relates to a metering calibration device for a mechanical instrument, which comprises a base, a portal frame is fixedly connected to the top of the base, a mounting frame is fixedly connected to the top of the portal frame, and a mechanical instrument body is movably placed in the mounting frame. A clamping and fixing mechanism used for fixing the mechanical instrument body is arranged in the mounting frame, and an electric push rod is fixedly connected to the top of the base. According to the utility model, the structural design is reasonable, the mechanical instrument can be conveniently and effectively clamped and fixed during calibration, the influence of displacement and shaking on the metering calibration precision is avoided, the connection between the electric push rod and the hook of the mechanical instrument is facilitated through the anti-drop connecting mechanism, and meanwhile, the electric push rod can be stably hung on the hook of the mechanical instrument, so that the calibration precision is improved. And therefore, the phenomenon that normal metering calibration is influenced due to falling is avoided, and the use effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical instrument calibration, in particular to a measurement calibration device for mechanical instruments. Background Art

[0002] Mechanical instruments are a general term for all mechanical instruments based on the law of force and force effect. Mechanical instruments are common equipment in life, and the measurement and calibration devices used for mechanical instruments are devices used for measurement and calibration of mechanical instruments.

[0003] However, the metrological calibration device for mechanical instruments in the related art still has some shortcomings. During calibration, personnel are required to hold the mechanical instrument, which is inconvenient to effectively clamp and fix the mechanical instrument. The mechanical instrument is prone to displacement and shaking, which affects the accuracy of metrological calibration. Moreover, during metrological calibration, it is inconvenient to firmly hang the connecting parts on the metrological calibration device on the hook of the mechanical instrument, and it is easy to fall off, affecting the normal metrological calibration work. Therefore, we propose a metrological calibration device for mechanical instruments to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to solve the above-mentioned shortcomings and to propose a measurement and calibration device for mechanical instruments.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A metrological calibration device for mechanical instruments comprises a base, the top of the base is fixedly connected to a gantry, the top of the gantry is fixedly connected to a mounting frame, a mechanical instrument body is movably placed in the mounting frame, a clamping and fixing mechanism for fixing the mechanical instrument body is provided in the mounting frame, the top of the base is fixedly connected to an electric push rod, a tension sensor is fixedly connected to the output shaft of the electric push rod, the top of the tension sensor is fixedly connected to a mounting plate, an anti-detachment connection mechanism is provided on the mounting plate, the anti-detachment connection mechanism cooperates with a hook at the bottom of the mechanical instrument body, and a controller with a display screen is fixedly connected to the front side of the gantry.

[0007] As a preferred embodiment of the present invention, a cavity is provided in the mounting frame, and the clamping and fixing mechanism includes a servo motor fixedly connected to one side of the mounting frame, and a threaded sleeve rotatably connected to both sides of the mounting frame, a driving shaft is fixedly connected to the output shaft of the servo motor, and an outer fixed sleeve of the driving shaft is provided with two active sprockets, and the outer sides of the two threaded sleeves are fixed with driven sprockets, and the active sprocket and the driven sprocket on the same side are connected to the same chain for transmission, and threaded rods are threaded in the two threaded sleeves, and the external threads of the two threaded rods are arranged in opposite directions, and the ends of the two threaded rods close to each other are fixedly connected to a splint, and the sides of the two splints close to each other are fixedly connected to a rubber pad.

[0008] As a preferred embodiment of the present invention, the driving sprocket, the driven sprocket and the chain are all located in the cavity.

[0009] As a preferred embodiment of the present invention, the two clamping plates and the rubber pad are slidably sleeved in the installation frame.

[0010] As a preferred embodiment of the present invention, a placement hole is provided on the top of the gantry, and the hook of the mechanical instrument body is movably placed in the placement hole, and the size of the placement hole is smaller than the size of the mechanical instrument body.

[0011] As a preferred embodiment of the present invention, a slide groove is provided on the top of the mounting plate, a groove is provided on the inner wall of one side of the slide groove, the anti-slip connection mechanism includes a slider slidably sleeved in the slide groove, the top of the slider is fixedly connected to a support plate, the front side of the support plate is fixedly connected to a hanging rod, the front side of the hanging rod is fixedly connected to an anti-slip plate, and the hook of the mechanical instrument body is located in the gap between the support plate, the hanging rod and the anti-slip plate.

[0012] As a preferred embodiment of the present invention, a slot is provided on one side of the slider, a spring is fixedly connected to the inner wall of one side of the slot, one end of the spring is fixedly connected to a movable plate, one side of the movable plate is fixedly connected to a clamping rod, the clamping rod is movably clamped in the corresponding slot, and a pull rod is fixedly connected to the outer side of the movable plate.

[0013] As a preferred embodiment of the present invention, one end of the pull rod extends to the outside of the mounting plate and is fixedly connected to the pull plate.

[0014] In the utility model, a metrological calibration device for mechanical instruments is described. The mechanical instrument body is placed on the top of the gantry, and its hook is passed through the placement hole. Then the servo motor is started, the servo motor drives the rotation of the drive shaft, the drive shaft drives the rotation of the two active sprockets, the two active sprockets drive the synchronous operation of the two chains and the driven sprockets, and the two driven sprockets drive the synchronous rotation of the two threaded sleeves. Because the external threads of the two threaded rods are arranged in opposite directions, under the guide limit of the installation frame, the two threaded rods drive the two clamping plates and the rubber pads to approach each other to clamp and fix the mechanical instrument body, thereby avoiding displacement and shaking in the metrological calibration, which affects the precision and accuracy of the calibration.

[0015] The cam is then released from the locking chute, and the spring is released, and the locking chute is released from the locking chute, and the locking chute is released from the locking chute, and the locking chute is released from the locking chute, and the locking chute is released from the locking chute, and the locking chute is released from the locking chute, and the locking chute is released from the locking chute, and the locking chute is released from the locking chute, and the locking chute is released from the locking chute, and the locking chute is released from the locking chute, and the locking chute is released from the locking chute, and the locking chute is released Lock the slider in the slot, and then start the electric push rod to hang the hanging rod on the hook. At the same time, the limit between the support plate and the anti-drop plate prevents the hanging rod from falling off the hook, ensuring the normal use of measurement and calibration. Then, after the electric push rod drives the hanging rod and the hook to move down a certain distance, the tension at this time can be displayed through the tension sensor and the display screen on the controller. At the same time, the tension displayed on the mechanical instrument itself can be observed. By comparing 3 to 5 groups of data and taking the average value, the purpose of measurement and calibration of the mechanical instrument can be achieved.

[0016] The utility model has a reasonable structural design, which is convenient for effectively clamping and fixing the mechanical instrument during calibration, avoiding displacement and shaking that affects the accuracy of measurement calibration. The anti-detachment connection mechanism is not only conducive to the connection between the electric push rod and the hook of the mechanical instrument, but also can be stably hung on the hook of the mechanical instrument, making it less likely to fall off, avoiding falling off that affects normal measurement calibration, and improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a first-perspective stereoscopic diagram of a measurement and calibration device for mechanical instruments proposed in the present utility model;

[0018] Figure 2 This is a second perspective stereogram of a measurement and calibration device for mechanical instruments proposed in the present invention;

[0019] Figure 3This is a top cross-sectional view of a clamping and fixing mechanism for a measurement and calibration device of a mechanical instrument proposed in the present invention;

[0020] Figure 4 for Figure 2 Schematic diagram of the structure of part A;

[0021] Figure 5 The utility model is a cross-sectional view of an anti-detachment connection mechanism for a measurement and calibration device of a mechanical instrument.

[0022] In the figure: 1. base; 2. gantry; 3. placement hole; 4. mounting frame; 5. mounting plate; 6. clamping and fixing mechanism; 7. electric push rod; 8. controller; 9. anti-slip connection mechanism; 10. tension sensor; 41. cavity; 61. servo motor; 62. drive shaft; 63. driving sprocket; 64. chain; 65. threaded sleeve; 66. threaded rod; 67. driven sprocket; 68. splint; 69. rubber pad; 901. pull plate; 902. support plate; 903. hanging rod; 904. anti-slip plate; 905. slide groove; 906. slider; 907. clamping rod; 908. clamping slot; 909. groove; 910. pull rod; 911. spring; 912. moving plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Reference Figure 1-5 A metrological calibration device for mechanical instruments comprises a base 1, a gantry 2 is fixedly connected to the top of the base 1, a mounting frame 4 is fixedly connected to the top of the gantry 2, a mechanical instrument body is movably placed in the mounting frame 4, a clamping and fixing mechanism 6 for fixing the mechanical instrument body is provided in the mounting frame 4, an electric push rod 7 is fixedly connected to the top of the base 1, a tension sensor 10 is fixedly connected to the output shaft of the electric push rod 7, a mounting plate 5 is fixedly connected to the top of the tension sensor 10, an anti-slip connection mechanism 9 is provided on the mounting plate 5, the anti-slip connection mechanism 9 cooperates with the hook at the bottom of the mechanical instrument body, and a controller 8 with a display screen is fixedly connected to the front side of the gantry 2.

[0025] As a further feature of the present invention, a cavity 41 is provided in the mounting frame 4, and the clamping and fixing mechanism 6 includes a servo motor 61 fixedly connected to one side of the mounting frame 4, and a threaded sleeve 65 rotatably connected to both sides of the mounting frame 4. A drive shaft 62 is fixedly connected to the output shaft of the servo motor 61, and two driving sprockets 63 are provided on the outer side of the drive shaft 62. A driven sprocket 67 is fixed on the outer sides of the two threaded sleeves 65. The driving sprocket 63 and the driven sprocket 67 on the same side are connected to the same chain 64 for transmission. A threaded rod 66 is threaded in each of the two threaded sleeves 65, and the rotation directions of the external threads of the two threaded rods 66 are set in opposite directions. The ends of the two threaded rods 66 close to each other are fixedly connected to a splint 68, and the sides of the two splints 68 close to each other are fixedly connected to a rubber pad 69.

[0026] The above scheme is adopted: the mechanical instrument body (which can be a mechanical instrument such as a dynamometer, a tension spring balance, etc.) is placed on the top of the gantry 2, and its hook is passed through the placement hole 3, and then the servo motor 61 is started. The servo motor 61 drives the rotation of the drive shaft 62, and the drive shaft 62 drives the rotation of the two active sprockets 63. The two active sprockets 63 drive the synchronous operation of the two chains 64 and the driven sprockets 67, and the two driven sprockets 67 drive the synchronous rotation of the two threaded sleeves 65. Because the external threads of the two threaded rods 66 are set in opposite directions, under the guide limit of the mounting frame 4, the two threaded rods 66 drive the two clamps 68 and the rubber pads 69 to approach each other to clamp and fix the mechanical instrument body, so as to avoid displacement and shaking of the measurement calibration and affect the precision and accuracy of the calibration.

[0027] As a further feature of the present invention, the driving sprocket 63 , the driven sprocket 67 and the chain 64 are all located in the cavity 41 , which is beneficial for protecting the driving sprocket 63 , the driven sprocket 67 and the chain 64 .

[0028] As a further feature of the present invention, the two clamping plates 68 and the rubber pad 69 are both slidably sleeved in the mounting frame 4 , which helps guide the clamping plates 68 so that they do not rotate together with the threaded sleeve 65 .

[0029] As a further feature of the present invention, a placement hole 3 is provided on the top of the gantry 2, and the hook of the mechanical instrument body is movably placed in the placement hole 3. The size of the placement hole 3 is smaller than the size of the mechanical instrument body, which does not hinder the passage of the hook and is conducive to supporting the mechanical instrument body.

[0030] As a further feature of the present invention, a slide groove 905 is provided on the top of the mounting plate 5, and a groove 909 is provided on the inner wall of one side of the slide groove 905. The anti-slip connection mechanism 9 includes a slider 906 slidably sleeved in the slide groove 905. The top of the slider 906 is fixedly connected to the support plate 902, the front side of the support plate 902 is fixedly connected to the hanging rod 903, and the front side of the hanging rod 903 is fixedly connected to the anti-slip plate 904. The hook of the mechanical instrument body is located in the gap between the support plate 902, the hanging rod 903 and the anti-slip plate 904.

[0031] As a further feature of the present invention, a slot 908 is provided on one side of the slider 906, and a spring 911 is fixedly connected to the inner wall of one side of the slot 909. One end of the spring 911 is fixedly connected to a movable plate 912, and one side of the movable plate 912 is fixedly connected to a clamping rod 907. The clamping rod 907 is movably clamped in the corresponding slot 908, and a pull rod 910 is fixedly connected to the outer side of the movable plate 912.

[0032] The above solution is adopted: pull the pull plate 901, so that the card rod 907 moves to the left and squeezes the spring 911, and at the same time the card rod 907 disengages from the card slot 908 without fixing the slider 906, and pulls the support plate 902 and the slider 906 backward so that the anti-slip plate 904 is located at the rear side of the hook of the mechanical instrument body, thereby not hindering the electric push rod 7 from driving the anti-slip plate 904, the support plate 902 and the hanging rod 903 to move up a distance, and then push the support plate 902 back forward (back to its original position), so that the hanging rod 903 is located above the hook, and the hook is located between the support plate 902 and the anti-slip plate 904. Then the pull plate 901 and the pull rod 910 are released. At this time, under the elastic force of the spring 911, the clamping rod 907 is clamped in the clamping slot 908 to lock the slider 906. Then the electric push rod 7 is started to hang the hanging rod 903 on the hook. At the same time, through the limit between the support plate 902 and the anti-slip plate 904, the hanging rod 903 is prevented from falling off the hook, thereby ensuring the normal use of measurement and calibration.

[0033] As a further feature of the present invention, one end of the pull rod 910 extends to the outside of the mounting plate 5 and is fixedly connected to the pull plate 901 to facilitate pulling the pull rod 910 .

[0034] In the present utility model, when in use, the mechanical instrument body (which can be a mechanical instrument such as a dynamometer, a tension spring scale, etc.) is placed on the top of the gantry 2, and its hook is passed through the placement hole 3, and then the servo motor 61 is started, the servo motor 61 drives the rotation of the drive shaft 62, the drive shaft 62 drives the rotation of the two active sprockets 63, the two active sprockets 63 drive the synchronous operation of the two chains 64 and the driven sprockets 67, and the two driven sprockets 67 drive the synchronous rotation of the two threaded sleeves 65. Because the external threads of the two threaded rods 66 are set in opposite directions, under the guide limit of the mounting frame 4, the two threaded rods 66 drive the two clamps 68 and the rubber pads 69 to approach each other to clamp and fix the mechanical instrument body, so as to avoid displacement and shaking of the measurement calibration and affect the precision and accuracy of the calibration.

[0035] The pull plate 901 is pulled to make the latch rod 907 move to the left and squeeze the spring 911. At the same time, the latch rod 907 disengages from the latch slot 908 without fixing the slider 906. The support plate 902 and the slider 906 are pulled backward so that the anti-slip plate 904 is located at the rear side of the hook of the mechanical instrument body, thereby not hindering the electric push rod 7 from driving the anti-slip plate 904, the support plate 902 and the hanging rod 903 to move up a distance first, and then push the support plate 902 back forward (back to its original position) so that the hanging rod 903 is located above the hook, and the hook is located between the support plate 902 and the anti-slip plate 904. Then the pull plate 901 and the pull rod 910 are released. At this time, under the elastic force of the spring 911 , the locking rod 907 is engaged in the locking groove 908 to lock the slider 906, and then the electric push rod 7 is started to hang the hanging rod 903 on the hook. At the same time, the limit between the support plate 902 and the anti-slip plate 904 is used to prevent the hanging rod 903 from falling off the hook, thereby ensuring the normal use of measurement and calibration. Then, every time the electric push rod 7 drives the hanging rod 903 and the hook to move down a certain distance, the tension sensor 10 and the display screen on the controller can display the tension at this time. At the same time, the tension displayed on the mechanical instrument body itself is observed. By comparing 3 to 5 groups of data and taking the average value, the purpose of measurement and calibration of the mechanical instrument body can be achieved.

Claims

1. A metrological calibration device for mechanical instruments, characterized in that: The invention comprises a base (1), wherein the top of the base (1) is fixedly connected to a gantry (2), the top of the gantry (2) is fixedly connected to a mounting frame (4), a mechanical instrument body is movably placed in the mounting frame (4), and a clamping and fixing mechanism (6) for fixing the mechanical instrument body is provided in the mounting frame (4), the top of the base (1) is fixedly connected to an electric push rod (7), a tension sensor (10) is fixedly connected to the output shaft of the electric push rod (7), the top of the tension sensor (10) is fixedly connected to a mounting plate (5), an anti-slip connection mechanism (9) is provided on the mounting plate (5), and the anti-slip connection mechanism (9) cooperates with a hook at the bottom of the mechanical instrument body, and the front side of the gantry (2) is fixedly connected to a controller (8) with a display screen.

2. A measurement and calibration device for mechanical instruments according to claim 1, characterized in that: A cavity (41) is provided in the installation frame (4), and the clamping and fixing mechanism (6) includes a servo motor (61) fixedly connected to one side of the installation frame (4), and a threaded sleeve (65) rotatably connected to both sides of the installation frame (4). A drive shaft (62) is fixedly connected to the output shaft of the servo motor (61), and an outer fixed sleeve of the drive shaft (62) is provided with two active sprockets (63). The outer sides of the two threaded sleeves (65) are both fixedly provided with a driven sprocket (67). The active sprocket (63) and the driven sprocket (67) on the same side are connected to the same chain (64). The inner threads of the two threaded sleeves (65) are both threaded with threaded rods (66). The external threads of the two threaded rods (66) are arranged in opposite directions. The ends of the two threaded rods (66) close to each other are both fixedly connected to a clamping plate (68), and the sides of the two clamping plates (68) close to each other are both fixedly connected to a rubber pad (69).

3. A measurement and calibration device for mechanical instruments according to claim 2, characterized in that: The driving sprocket (63), the driven sprocket (67) and the chain (64) are all located in the cavity (41).

4. A measurement and calibration device for mechanical instruments according to claim 2, characterized in that: The two clamping plates (68) and the rubber pad (69) are slidably sleeved in the mounting frame (4).

5. The metrological calibration device for mechanical instruments according to claim 1, characterized in that: A placement hole (3) is provided on the top of the gantry (2), and the hook of the mechanical instrument body is movably placed in the placement hole (3). The size of the placement hole (3) is smaller than that of the mechanical instrument body.

6. A metrological calibration device for mechanical instruments according to claim 1, characterized in that: A slide groove (905) is provided on the top of the mounting plate (5), and a groove (909) is provided on the inner wall of one side of the slide groove (905). The anti-slip connection mechanism (9) includes a slider (906) slidably sleeved in the slide groove (905), the top of the slider (906) is fixedly connected to the support plate (902), the front side of the support plate (902) is fixedly connected to the hanging rod (903), and the front side of the hanging rod (903) is fixedly connected to the anti-slip plate (904), and the hook of the mechanical instrument body is located in the gap between the support plate (902), the hanging rod (903) and the anti-slip plate (904).

7. A metrological calibration device for mechanical instruments according to claim 6, characterized in that: A slot (908) is provided on one side of the slider (906), a spring (911) is fixedly connected to the inner wall of one side of the slot (909), one end of the spring (911) is fixedly connected to a movable plate (912), one side of the movable plate (912) is fixedly connected to a clamping rod (907), the clamping rod (907) is movably clamped in the corresponding slot (908), and the outer side of the movable plate (912) is fixedly connected to a pull rod (910).

8. A metrological calibration device for mechanical instruments according to claim 7, characterized in that: One end of the pull rod (910) extends along the outside of the mounting plate (5) and is fixedly connected to the pull plate (901).

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