Weighing high-precision calibrating device for checking electronic scale

Abstract

The utility model relates to the technical field of electronic scale verification, and discloses a weighing high-precision verification device for verifying an electronic scale, which comprises an operation table, a weight placing frame is fixedly arranged on the operation table, a plurality of weight limiting assemblies are fixedly arranged on the weight placing frame, and weight driving assemblies are arranged on the weight limiting assemblies; a mounting frame is fixedly mounted on the operation table, a servo motor is arranged on the mounting frame, a telescopic rod is fixedly mounted at the output end of a shaft part of the servo motor, and a treatment chamber is fixedly mounted on the telescopic rod; a stepping motor is arranged on the processing chamber, a threaded rod is fixedly installed at the output end of the shaft portion of the stepping motor and connected with a nut pair through threads, a connecting block is fixedly installed on the nut pair, a magnetic rod is fixedly installed on the connecting block, and a structure matched with the magnetic rod is arranged in the weight driving assembly. According to the utility model, test loads with different weights can be rapidly applied to the loader of the to-be-tested checkweigher, the moving amplitude is small, and the efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic scale verification, in particular to a high-precision weighing verification device for testing electronic scales. Background Art

[0002] With the development of social economy and the increasing frequency of economic and trade activities, people have higher and higher technical requirements for electronic scales, requiring them to have high precision and fast running speed. In order to ensure the accuracy of electronic scales, they need to be calibrated frequently to ensure the accuracy of their weighing precision.

[0003] The existing patent document with announcement number CN219589808U discloses a calibration device for checking the weighing accuracy of an electronic scale, comprising a calibration platform, an electronic scale body installed above the calibration platform, and a weight plate installed on one side of the electronic scale body. The device also comprises a moving component, which is used to drive the weight to move to the electronic scale body, and the moving component is installed above the calibration platform.

[0004] However, according to the metrological verification regulations, it is necessary to add a test load to the load-bearing device of the checkweigher to be tested, from zero point to the maximum weighing, and then unload the load to zero point in the reverse method (at least 10 different weighing points should be selected for the first verification, and at least 5 weighing points should be selected for subsequent verifications), and the subsequent static weighing overload test requires dividing the electronic scale into areas and testing the load in different areas.

[0005] When the above equipment is in use, the change of the weighing point requires a large moving distance and amplitude, which is inefficient and cannot perform static weighing overload tests, requiring human participation.

[0006] We propose a high-precision weighing calibration device for testing electronic scales to solve the above problems. Utility Model Content

[0007] The utility model aims to solve the problems existing in the prior art, and proposes a high-precision weighing calibration device for testing electronic scales. By combining a magnetic rod with a weight driving assembly having calibration weights of different weights, test loads of different weights can be quickly added to the load-bearing device of the tested check weighing scale, with a small movement range and high efficiency.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A high-precision weighing calibration device for testing an electronic scale comprises an operating table, a weight placing rack is fixedly mounted on the operating table, a plurality of weight limiting assemblies are fixedly mounted on the weight placing rack in a circular shape at equal intervals, and a weight driving assembly is arranged on each of the weight limiting assemblies;

[0010] A mounting frame is fixedly installed on the operating table, a servo motor is arranged on the mounting frame, a telescopic rod is fixedly installed on the shaft output end of the servo motor, and a processing chamber is fixedly installed on the telescopic rod;

[0011] A stepper motor is arranged on the processing chamber, a threaded rod is fixedly installed on the output end of the shaft of the stepper motor, a nut pair is threadedly connected to the threaded rod, a connecting block is fixedly installed on the nut pair, a magnetic rod is fixedly installed on the connecting block, and a structure adapted to the magnetic rod is arranged in the weight driving assembly.

[0012] Preferably, the weight driving assembly includes a fixed block, matching blocks are fixedly installed on both sides of the fixed block, adsorption holes are opened on the fixed block, a connecting plate is fixedly installed on the fixed block, a hook is fixedly installed on the other end of the connecting plate, and a calibration weight is coupled to the hook.

[0013] Preferably, the weight limiting assembly comprises a fixing frame, which is fixedly mounted on the weight placing frame, on which two limiting blocks are fixedly mounted, and a descending groove is provided on the fixing frame, which is matched with the matching block.

[0014] Preferably, the adsorption hole is adapted to the magnetic rod, and the two can be magnetically matched.

[0015] Preferably, the number of weight limiting assemblies on the weight placement rack is the same as the number of weight driving assemblies, and the weights of the calibrated weights on the multiple groups of weight driving assemblies are different and decrease in counterclockwise direction.

[0016] Preferably, a positioning slot for placing an electronic scale is provided on the operating table.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The utility model is provided with an operating table, a weight placement rack, a servo motor, a telescopic rod, a processing chamber, a stepper motor, a weight limit assembly, a weight driving assembly, a threaded rod, a nut pair, a connecting block and a magnetic rod. The stepper motor can make the connecting block drive the magnetic rod to move. By controlling the rotation angle of the processing chamber, the magnetic rod can be combined with the weight driving assembly with calibration weights of different weights, so that test loads of different weights can be quickly added to the load-bearing device of the measured check weighing scale. The movement range is small and the efficiency is high. In addition, the establishment and release of the connection relationship between the magnetic rod and the weight driving assembly are relatively convenient, and the utility model is more practical.

[0019] (2) The utility model is provided with a servo motor, a telescopic rod, a processing chamber, a threaded rod of a weight driving assembly, a nut pair, a connecting block and a magnetic rod. The threaded rod and the nut pair can change the position of the weight driving assembly, thereby realizing the eccentric load verification of the center area and the edge area. When the weight driving assembly is at the edge position, the angle of each rotation of the processing chamber is fixed, so that static weighing eccentric load tests of multiple groups of edge positions can be realized, with low degree of manual participation and higher efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a high-precision weighing calibration device for testing electronic scales proposed by the utility model;

[0021] Figure 2 This is a schematic diagram of the installation structure on the operating table of a high-precision weighing calibration device for testing electronic scales proposed by the utility model;

[0022] Figure 3 This is a schematic diagram of the installation structure of a high-precision calibration device for testing electronic scales on a weight placement rack proposed by the utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of a processing chamber of a high-precision weighing calibration device for testing electronic scales proposed by the utility model;

[0024] Figure 5 The utility model provides a schematic diagram of a weight limit assembly and a weight driving assembly of a high-precision weighing calibration device for testing an electronic scale.

[0025] In the figure: 1. operating table; 2. mounting frame; 3. weight placement frame; 4. servo motor; 5. positioning slot; 6. telescopic rod; 7. processing chamber; 8. stepper motor; 9. weight limit assembly; 10. weight driving assembly; 11. threaded rod; 12. nut pair; 13. connecting block; 14. magnetic rod; 15. fixing block; 16. matching block; 17. adsorption hole; 18. connecting plate; 19. hook; 20. calibration weight; 21. fixing frame; 22. limiting block; 23. descending slot. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 5A high-precision weighing calibration device for testing electronic scales, comprising an operating table 1, on which a weight placing rack 3 is fixedly mounted, on which a plurality of weight limiting assemblies 9 are evenly and evenly fixedly mounted in a circular ring shape at equal intervals, and on which weight limiting assemblies 9 are each provided with a weight driving assembly 10;

[0028] The design of the multiple weight limit assemblies 9 and the weight driving assemblies 10 is convenient for adding test loads from zero point to maximum weighing and in reverse order.

[0029] A mounting frame 2 is fixedly mounted on the operating table 1, a servo motor 4 is arranged on the mounting frame 2, a telescopic rod 6 is fixedly mounted on the shaft output end of the servo motor 4, and a processing chamber 7 is fixedly mounted on the telescopic rod 6;

[0030] The start of the servo motor 4 can rotate the processing chamber 7, and the telescopic rod 6 can lift the processing chamber 7, thereby changing the position thereof, so as to facilitate the execution of different operations.

[0031] A stepper motor 8 is arranged on the processing chamber 7, a threaded rod 11 is fixedly mounted on the shaft output end of the stepper motor 8, the threaded rod 11 is threadedly connected to a nut pair 12, a connecting block 13 is fixedly mounted on the nut pair 12, a magnetic rod 14 is fixedly mounted on the connecting block 13, and a structure adapted to the magnetic rod 14 is arranged in the weight driving assembly 10.

[0032] Starting the stepper motor 8 can cause the threaded rod 11 to rotate, and the rotation of the threaded rod 11 causes the nut pair 12 to move synchronously. The synchronous movement of the nut pair 12 drives the connecting block 13 and the magnetic rod 14, and then the magnetic rod 14 is combined with the weight driving assembly 10, completing the transfer work of the weight driving assembly 10 and executing the electronic scale calibration activity.

[0033] The weight driving assembly 10 includes a fixed block 15, on both sides of which matching blocks 16 are fixedly installed, the fixed block 15 is provided with adsorption holes 17, a connecting plate 18 is fixedly installed on the fixed block 15, a hook 19 is fixedly installed at the other end of the connecting plate 18, and a calibration weight 20 is coupled to the hook 19.

[0034] The connection between the hook 19 and the calibration weight 20 can be released as the height changes, so that the calibration weight 20 is located on the weighing area of ​​the electronic scale to perform calibration activities.

[0035] The weight limiting assembly 9 includes a fixing frame 21 , which is fixedly mounted on the weight placing frame 3 , on which two limiting blocks 22 are fixedly mounted, and on which a descending groove 23 is formed, which is matched with the matching block 16 .

[0036] When the magnetic rod 14 extends into the adsorption hole 17 and continues to move outward, the weight drives the assembly 10 to move synchronously. When the matching block 16 is directly above the descending groove 23, the processing chamber 7 is lowered by the telescopic rod 6, so that the weight drives the assembly 10 to move out completely, and they move synchronously at this time.

[0037] When the weight driving assembly 10 is reset, the matching block 16 in the weight driving assembly 10 is located directly below the descending groove 23, and then the processing chamber 7 is moved upward through the telescopic rod 6, and then the connecting block 13 and the magnetic rod 14 are retracted. With the cooperation of the matching block 16 and the two limit blocks 22, the magnetic rod 14 can be separated from the weight driving assembly 10 to carry out the next weight load test activity.

[0038] The adsorption hole 17 is matched with the magnetic rod 14, and the two can be magnetically matched.

[0039] The number of weight limiting components 9 on the weight placing frame 3 is the same as the number of weight driving components 10, and the weights of the calibration weights 20 on the multiple groups of weight driving components 10 are different, decreasing in counterclockwise direction.

[0040] Calibration weights 20 of various specifications can be used for testing the load on the load carrier of the check weighing scale.

[0041] A positioning slot 5 for placing an electronic scale is provided on the operating table 1 .

[0042] The range of the positioning groove 5 is equivalent to the projected area of ​​the processing chamber 7, so that a static weighing eccentric load test can be carried out.

[0043] The working process of the utility model is: firstly, a static weighing eccentric load test is carried out, and a calibration weight 20 having a weight of one third of the maximum load-bearing weight of the electronic scale is selected for operation.

[0044] The processing chamber 7 is moved to the corresponding height and appropriate angle by the servo motor 4 and the telescopic rod 6, and then the stepper motor 8 is started to rotate the threaded rod 11, thereby driving the connecting block 13 and the magnetic rod 14 to move. When the connecting block 13 moves to the edge, the magnetic rod 14 extends into the adsorption hole 17. Through magnetism, the magnetic rod 14 can be stably combined with the weight driving assembly 10.

[0045] The magnetic rod 14 continues to move outward, which will cause the weight to drive the assembly 10 to move synchronously. When the matching block 16 is directly above the descending groove 23, the processing chamber 7 is lowered by the telescopic rod 6, so that the weight can drive the assembly 10 to move out synchronously.

[0046] Then the movement of the connecting block 13 drives the weight driving assembly 10 to move synchronously, and the stepper motor 8 is started so that the connecting block 13 drives the weight driving assembly 10 to move to the middle part. At this time, the calibration weight 20 on the weight driving assembly 10 is directly above the middle position of the electronic scale.

[0047] Then, the processing chamber 7 is lowered by the telescopic rod 6. At this time, the weight drives the assembly 10 to descend synchronously. When the calibration weight 20 contacts the electronic scale, the telescopic rod 6 is slightly lowered, so that the connection between the hook 19 and the calibration weight 20 can be released, so that the calibration weight 20 is located in the weighing area of ​​the electronic scale to carry out the central area calibration activity.

[0048] Then the telescopic rod 6 rises, the hook 19 re-establishes the connection with the calibration weight 20, and then the stepper motor 8 is started so that the weight drives the assembly 10 to move to the edge of the processing chamber 7, and continues to descend, and the operation can be performed to calibrate the edge area.

[0049] By rotating the servo motor 4, the weight can drive the assembly 10 to rotate. The angle of each rotation is 360 degrees divided by the number of edge detection parts. Through multiple descending and rotating activities, the static weighing overload test can be smoothly carried out.

[0050] After the operation is completed, the matching block 16 in the weight-driven assembly 10 is located directly below the descending groove 23, and then the processing chamber 7 is moved upward for a distance through the telescopic rod 6, so that the matching block 16 and the limit block 22 are at the same height, and then the connecting block 13 and the magnetic rod 14 are retracted. With the cooperation of the matching block 16 and the two limit blocks 22, the magnetic rod 14 can be separated from the weight-driven assembly 10 to carry out the next weight load test activity.

[0051] After that, it is necessary to add a test load to the load-bearing device of the check weighing scale to be tested. By combining the magnetic rod 14 with the weight driving assembly 10 having calibration weights 20 of different weights in turn, the same placement and return operations can be performed to achieve a gradual increase and decrease of the test load, thereby successfully completing the electronic scale calibration activity.

[0052] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0053] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision weighing calibration device for testing electronic scales, comprising an operating table (1), characterized in that: A weight placement rack (3) is fixedly mounted on the operating table (1), a plurality of weight limiting assemblies (9) are fixedly mounted on the weight placement rack (3) in an equidistant and evenly circular ring shape, and a weight driving assembly (10) is disposed on each of the weight limiting assemblies (9); A mounting frame (2) is fixedly mounted on the operating table (1), a servo motor (4) is arranged on the mounting frame (2), a telescopic rod (6) is fixedly mounted on the shaft output end of the servo motor (4), and a processing chamber (7) is fixedly mounted on the telescopic rod (6); A stepper motor (8) is arranged on the processing chamber (7), a threaded rod (11) is fixedly mounted on the output end of the shaft of the stepper motor (8), the threaded rod (11) is threadedly connected to a nut pair (12), a connecting block (13) is fixedly mounted on the nut pair (12), a magnetic rod (14) is fixedly mounted on the connecting block (13), and a structure adapted to the magnetic rod (14) is arranged in the weight driving assembly (10).

2. A high-precision weighing calibration device for testing electronic scales according to claim 1, characterized in that: The weight driving assembly (10) comprises a fixed block (15), matching blocks (16) are fixedly mounted on both sides of the fixed block (15), an adsorption hole (17) is provided on the fixed block (15), a connecting plate (18) is fixedly mounted on the fixed block (15), a hook (19) is fixedly mounted on the other end of the connecting plate (18), and a calibration weight (20) is coupled to the hook (19).

3. The high-precision weighing calibration device for testing electronic scales according to claim 1, characterized in that: The weight limiting assembly (9) comprises a fixing frame (21), the fixing frame (21) is fixedly mounted on the weight placing frame (3), two limiting blocks (22) are fixedly mounted on the fixing frame (21), a descending groove (23) is provided on the fixing frame (21), and the descending groove (23) is adapted to the matching block (16).

4. The high-precision weighing calibration device for testing electronic scales according to claim 1, characterized in that: The adsorption hole (17) is matched with the magnetic rod (14), and the two can be matched by magnetic attraction.

5. The high-precision weighing calibration device for testing electronic scales according to claim 1, characterized in that: The number of weight limiting assemblies (9) on the weight placing frame (3) is the same as the number of weight driving assemblies (10), and the weights of the calibration weights (20) on the multiple groups of weight driving assemblies (10) are different and decrease in counterclockwise order.

6. The high-precision weighing calibration device for testing electronic scales according to claim 1, characterized in that: A positioning slot (5) for placing an electronic scale is provided on the operating table (1).

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