High-precision testing device for electronic scale production

Abstract

This utility model relates to the field of electronic weighing technology, specifically a high-precision testing device for electronic weighing production. It includes a testing platform, a tension mechanism, an upper hanger, and a lower hanger. The tension mechanism is installed on the rear wall of the testing platform, the lower hanger is installed at the front end of the tension mechanism, and the upper hanger is installed at the top of the testing platform. The upper and lower hangers are perpendicular to each other. A swaying component is installed at the front end of the upper hanger. The swaying component, when rotated, causes the upper hanger to sway back and forth slightly. By using the tension mechanism and the lower hanger to perform downward tension testing on the electronic crane scale, the influence of the scale's own weight can be reduced, thereby improving the accuracy of the test. The swaying component causes the upper hanger to sway slightly, simulating the swaying of externally hoisted goods, thus enabling high-precision testing of the electronic crane scale and improving the accuracy of the test data.

Description

Technical Field

[0001] This utility model relates to the field of electronic weighing instrument technology, specifically a high-precision testing device for electronic weighing instrument production. Background Technology

[0002] Electronic weighing instruments, as a core component of industrial automation and intelligent measurement systems, are widely used in diverse fields such as food processing, chemical industry, logistics, pharmaceuticals, and high-end equipment manufacturing. Their measurement accuracy and stability directly determine the quality of downstream products, trade fairness, and the controllability of production processes. Common examples include electronic crane scales, which are suspended structures that use hooks to suspend the object being weighed. Their weighing range ranges from hundreds of kilograms to tens of tons and are suitable for lifting operations such as cranes and overhead cranes, such as lifting parts in factory workshops and lifting containers in ports. For example, CN219121536U discloses an electronic crane scale calibration device, including a support frame, a base plate, and a support plate above the base plate. A hydraulic cylinder is mounted on the upper surface of the support plate, with its output end passing downwards through the support plate. A sensor is connected to the output end of the hydraulic cylinder, and the lower end of the sensor is connected to the crane scale to be tested. A connecting rope is connected to the lower end of the crane scale. A fixed base and a storage mechanism are mounted on the upper surface of the base plate. The fixed base includes a second fixed shaft, and the storage mechanism is located on one side of the fixed base. The end of the connecting rope away from the crane scale runs along the outer periphery of the second fixed shaft at least once around the bottom end of the second fixed shaft and connects to the storage mechanism. This utility model provides an electronic crane scale calibration device that uses a hydraulic cylinder instead of weights to provide force, and completes the calibration of the crane scale by comparing the force value displayed by the sensor with the displayed value of the crane scale being calibrated. However, this device uses a hydraulic cylinder instead of weights to provide force, and the electronic crane scale is tested by pulling it upwards. Since the electronic crane scale itself has a certain weight, the data measured by pulling upwards has a certain deviation. In addition, electronic crane scales are mostly used outdoors, and external wind forces cause goods to sway, which has a certain impact on the electronic crane scale. Therefore, it is urgent to design a high-precision testing device for electronic weighing instrument production to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a high-precision testing device for the production of electronic weighing instruments, in order to solve the problems mentioned in the background art. This device uses a hydraulic cylinder instead of weights to provide force values ​​and performs testing by pulling the electronic crane scale upwards. However, because the electronic crane scale itself has a certain weight, the data measured by pulling upwards has a certain deviation. In addition, electronic crane scales are mostly used outdoors, and external wind forces cause goods to sway, which has a certain impact on the electronic crane scale.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-precision testing device for electronic weighing instrument production, comprising a testing platform, a tension mechanism, an upper hanger, and a lower hanger. The tension mechanism is installed on the rear wall of the testing platform, the lower hanger is installed at the front end of the tension mechanism, and the upper hanger is installed at the top of the testing platform. The upper and lower hangers are perpendicular to each other. A wobbling component is installed at the front end of the upper hanger, and the operation of the wobbling component can cause the upper hanger to wobble back and forth slightly.

[0005] Preferably, the testing table has an extension opening at the center of its surface, and sliding rods are fixed parallel to each other on both sides of the testing table. A lower hanging component is placed vertically inside the extension opening.

[0006] Preferably, the tension mechanism includes a lead screw, a screw drum, and a limiting bearing. The bottom and top ends of the lead screw are fitted with limiting bearings, and two sets of limiting bearings are installed on the inner wall of the testing table. The screw drum is threaded onto the center of the lead screw, and the top end of the lead screw is driven by a first servo motor, which is installed on the top end of the testing table. A head connecting rod is laterally fixed to the outer side of the screw drum.

[0007] Preferably, the front end of the connecting rod is fixed with a lower hanging part, and the two ends of the connecting rod slide and rise within the corresponding sliding rod.

[0008] Preferably, the lower hanging component includes a fixing plate, a lower hanging ear, and a counterweight block. The lower hanging ear is installed at the top center of the fixing plate, and the counterweight block is fixed at the bottom end of the fixing plate. The fixing plate is fixed to the front end of the connecting rod.

[0009] Preferably, the upper hanger includes an upper U-shaped block, fixed bearings, and rollers. The upper U-shaped block is fixed to the top of the testing platform. Fixed bearings are fixed on both sides of the bottom end of the upper U-shaped block. Rollers are fixed inside the two sets of fixed bearings. The rollers rotate within the two sets of fixed bearings. An upper hanging lug is vertically fixed at the center of the bottom end of the roller. The weight of the upper hanging lug is always kept at the bottom end of the roller. An extension column is fixed at the right end of the roller. The extension column is connected to the front end of the wobbling component.

[0010] Preferably, the wobbling component includes a mounting plate, a second servo motor, a rotating shaft, and a horizontal plate. The mounting plate is installed on the rear wall of the testing table. The rotating shaft is inserted into the center of the mounting plate. The left end of the rotating shaft is driven by the second servo motor. A fixed circular plate is fixed to the right end of the rotating shaft. A fixed column is fixed to the right wall of the fixed circular plate. The fixed column and the extension column are respectively inserted at the front and rear ends of the horizontal plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This high-precision testing device for electronic weighing instrument production uses a tension mechanism and a lower hanging component to perform downward tension testing on the electronic crane scale. This reduces the impact of the weight of the electronic crane scale itself, thereby improving the accuracy of the test. By using a swaying component to drive the upper hanging component to sway slightly, it simulates the swaying of externally hoisted goods, thereby performing high-precision testing on the electronic crane scale and improving the accuracy of the test data.

[0012] This high-precision testing device for electronic weighing instrument production uses a configuration block in the lower part whose weight is the same as the basic test data of the electronic crane scale. The tension generated by the descent is an additional tension detection for the electronic crane scale, thereby detecting the tension data of the electronic crane scale and improving the applicability of the device. The rollers in the fixed bearing rotate to drive the top of the electronic crane scale to shake, thereby detecting the quality of the electronic crane scale and making it easy to operate. Attached Figure Description

[0013] Figure 1 This is a front view of the present utility model; Figure 2 This is a front sectional view of the present invention; Figure 3 This is an enlarged schematic diagram of the lower and upper hanging parts of this utility model; Figure 4 This is a side view of the upper hanging component structure of this utility model; Figure 5 This is an enlarged schematic diagram of the shaking component structure of this utility model.

[0014] In the diagram: 1. Testing platform; 11. Slide rod; 12. Extension port; 2. Tension mechanism; 21. Lead screw; 22. Lead drum; 23. Connecting rod; 24. First servo motor; 25. Limit bearing; 3. Lower hanger; 31. Fixing plate; 32. Lower hanging ear; 33. Counterweight; 4. Upper hanger; 41. Upper U-shaped block; 42. Fixing bearing; 43. Roller; 431. Extension column; 44. Upper hanging ear; 5. Shaking component; 51. Mounting plate; 52. Second servo motor; 53. Rotating shaft; 531. Fixing circular plate; 532. Fixing column; 54. Horizontal plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-5 One embodiment provided by this utility model: A high-precision testing device for electronic weighing instrument production includes a testing platform 1, a tension mechanism 2, an upper hanger 4, and a lower hanger 3. The tension mechanism 2 is installed on the rear wall of the testing platform 1, the lower hanger 3 is installed on the front end of the tension mechanism 2, and the upper hanger 4 is installed on the top of the testing platform 1. The upper hanger 4 and the lower hanger 3 are perpendicular to each other. A wobbling component 5 is installed on the front end of the upper hanger 4. The operation of the wobbling component 5 can drive the upper hanger 4 to wobble back and forth slightly.

[0017] As a further feature of this invention, an extension opening 12 is provided at the center of the testing platform 1, and sliding rods 11 are fixedly mounted on both sides of the testing platform 1 in parallel. A lower hanging piece 3 is vertically placed inside the extension opening 12, which facilitates the testing of electronic crane scales of different specifications.

[0018] Furthermore, the tension mechanism 2 includes a lead screw 21, a screw drum 22, and a limiting bearing 25. The bottom and top of the lead screw 21 are fitted with limiting bearings 25, and the two sets of limiting bearings 25 are installed on the inner wall of the testing platform 1. The screw drum 22 is threaded onto the center of the lead screw 21. The top of the lead screw 21 is driven by a first servo motor 24, which is installed on the top of the testing platform 1. A head connecting rod 23 is horizontally fixed on the outer side of the screw drum 22. A lower hanging part 3 is fixed at the front end of the connecting rod 23. The two ends of the connecting rod 23 slide and rise within the corresponding sliding rod 11. The above design is beneficial for continuous tension testing of the electronic crane scale and improves the accuracy of the test.

[0019] Furthermore, the lower hanging component 3 includes a fixed plate 31, a lower hanging ear 32, and a counterweight block 33. The lower hanging ear 32 is installed at the top center of the fixed plate 31, and the counterweight block 33 is fixed at the bottom end of the fixed plate 31. The fixed plate 31 is fixed at the front end of the connecting rod 23. By using the counterweight block with a standard weight, the electronic crane scale can be initially tested for tensile strength, thereby improving the accuracy of the test.

[0020] Furthermore, the upper hanger 4 includes an upper U-shaped block 41, fixed bearings 42, and rollers 43. The upper U-shaped block 41 is fixed to the top of the testing platform 1. Fixed bearings 42 are fixed on both sides of the bottom end of the upper U-shaped block 41. Rollers 43 are fixed inside the two sets of fixed bearings 42. The rollers 43 rotate within the two sets of fixed bearings 42. An upper hanging ear 44 is vertically fixed at the center of the bottom end of the rollers 43. The weight of the upper hanging ear 44 is always kept at the bottom end of the rollers 43. An extension column 431 is fixed at the right end of the rollers 43. The extension column 431 is connected to the front end of the swaying component 5. This design facilitates vertical and sway detection of the electronic crane scale and improves the applicability of the device.

[0021] Furthermore, the swaying component 5 includes a mounting plate 51, a second servo motor 52, a rotating shaft 53, and a horizontal plate 54. The mounting plate 51 is installed on the rear wall of the testing platform 1. The rotating shaft 53 is inserted into the center of the mounting plate 51. The left end of the rotating shaft 53 is driven by the second servo motor 52. The right end of the rotating shaft 53 is fixedly provided with a fixed circular plate 531. The right wall of the fixed circular plate 531 is fixedly provided with a fixed column 532. The fixed column 532 and the extension column 431 are respectively inserted at the front and rear ends of the horizontal plate 54. The above design is beneficial to drive the upper hanging component to make small-amplitude swaying, thereby simulating the swaying of external hoisted goods, so as to perform high-precision detection on the electronic crane scale and improve the accuracy of the detection data.

[0022] Working Principle: During use, the operator first hangs the top of the electronic crane scale on the upper hanging ear 44, and then hangs the bottom of the electronic crane scale on the lower hanging ear 32. The accuracy of the measurement is observed by checking the basic values ​​of the electronic crane scale through the configuration block 33 located on the bottom side of the lower hanging ear. Then, the first servo motor 24 is started to drive the lead screw 21 to rotate. The rotation of the lead screw 21 causes the lead drum 22 and the fixed connecting rod 23 to descend. The descent of the connecting rod 23 causes the fixed plate 31 to descend, and the descent of the fixed plate 31 causes the electronic crane scale to descend via the lower hanging ear 32 for continuous tensile testing. During the test, the scale can be... The second servo motor 52 is started to drive the front rotating shaft 53 to rotate. The rotation of the rotating shaft 53 drives the fixed circular plate 531 to rotate. The rotation of the fixed circular plate 531 drives the fixed column 532 inserted in the horizontal plate 54 to rotate. The rotation of 532 drives the horizontal plate 54 to move back and forth. The back and forth movement of the horizontal plate 54 drives the roller 43 to wobble slightly back and forth in the fixed bearing 42 through the extension column 431 fixed to the roller 43. The wobble of the roller 43 drives the electronic hanging scale to wobble through the upper hanging ear 44, thereby performing wobble detection. The above is the complete working principle of this utility model.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-precision testing device for electronic weighing instrument production, comprising a testing platform (1), a tension mechanism (2), an upper hanger (4), and a lower hanger (3), characterized in that: A tension mechanism (2) is installed on the rear wall of the testing platform (1). A lower hanging part (3) is installed at the front end of the tension mechanism (2). An upper hanging part (4) is installed at the top of the testing platform (1). The upper hanging part (4) and the lower hanging part (3) are perpendicular to each other. A swaying part (5) is installed at the front end of the upper hanging part (4). When the swaying part (5) is turned, it can drive the upper hanging part (4) to sway back and forth slightly.

2. The high-precision testing device for electronic weighing instrument production according to claim 1, characterized in that: An extension opening (12) is provided at the center of the test table (1), and sliding rods (11) are fixed parallel to each other on both sides of the test table (1). A hanging piece (3) is placed vertically inside the extension opening (12).

3. The high-precision testing device for electronic weighing instrument production according to claim 1, characterized in that: The tension mechanism (2) includes a lead screw (21), a screw drum (22) and a limiting bearing (25). The bottom end and the top side of the lead screw (21) are both fitted with limiting bearings (25). Two sets of limiting bearings (25) are installed on the inner wall of the testing table (1). The center thread of the lead screw (21) is fitted with a screw drum (22). The top end of the lead screw (21) is driven by a first servo motor (24). The first servo motor (24) is installed on the top end of the testing table (1). A head connecting rod (23) is fixed laterally on the outer side of the screw drum (22).

4. The high-precision testing device for electronic weighing instrument production according to claim 3, characterized in that: The front end of the connecting rod (23) is fixed with a lower hanging part (3), and the two ends of the connecting rod (23) slide and rise within the corresponding sliding rod (11).

5. The high-precision testing device for electronic weighing instrument production according to claim 1, characterized in that: The lower hanging part (3) includes a fixed plate (31), a lower hanging ear (32) and a counterweight (33). The lower hanging ear (32) is installed at the top center of the fixed plate (31), and the counterweight (33) is fixed at the bottom end of the fixed plate (31). The fixed plate (31) is fixed at the front end of the connecting rod (23).

6. The high-precision testing device for electronic weighing instrument production according to claim 1, characterized in that: The upper hanging part (4) includes an upper U-shaped block (41), a fixed bearing (42) and a roller (43). The upper U-shaped block (41) is fixed at the top of the testing table (1). Fixed bearings (42) are fixed on both sides of the bottom end of the upper U-shaped block (41). Rollers (43) are fixed inside the two sets of fixed bearings (42). The rollers (43) rotate within the two sets of fixed bearings (42). An upper hanging ear (44) is vertically fixed at the center of the bottom end of the roller (43). The weight of the upper hanging ear (44) is always kept at the bottom end of the roller (43). An extension column (431) is fixed at the right end of the roller (43). The extension column (431) is connected to the front end of the swaying part (5).

7. The high-precision testing device for electronic weighing instrument production according to claim 1, characterized in that: The swaying component (5) includes a mounting plate (51), a second servo motor (52), a rotating shaft (53), and a horizontal plate (54). The mounting plate (51) is mounted on the rear wall of the testing table (1). The rotating shaft (53) is inserted into the center of the mounting plate (51). The left end of the rotating shaft (53) is driven by the second servo motor (52). The right end of the rotating shaft (53) is fixed with a fixed circular plate (531). The right wall of the fixed circular plate (531) is fixed with a fixed column (532). The fixed column (532) and the extension column (431) are respectively inserted into the front and rear ends of the horizontal plate (54).

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