An automatic loading and unloading mechanism for an electronic hanging scale

Abstract

The present invention provides an automatic loading and unloading mechanism for an electronic hanging scale, which relates to the technical field of conveying metrological instruments; it includes an upper pulling head, a swivel joint, a moving seat and a cantilever bracket. The moving seat is slidably connected to the cantilever bracket. The swivel joint has a convex part, and the swivel joint is slidably connected to the moving seat up and down. The convex part can hold the moving seat. The swivel joint is also fixedly connected to the upper pulling head. The swivel joint is provided with a profile groove, and the profile groove is used for cooperative connection with a pull rod. The present invention has the following advantages: it solves the problems of poor safety and high working intensity in manual installation during the installation of the hanging scale, realizes full-automatic installation and automatic positioning; cooperates with a servo motor to accurately adjust the moving position of the hanging scale; operates stably, safely and reliably.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying metering instruments, and particularly relates to an automatic loading and unloading mechanism for an electronic hanging scale. Background Art

[0002] An electronic hanging scale is a metering instrument for online weighing of an item to be weighed in a suspended state. With the development of industry, the measuring range of electronic hanging scales is constantly expanding. The accuracy of electronic hanging scales is crucial for the accuracy of process control and the fairness and justice of trade settlement in industrial and mining enterprises. Therefore, the method for determining the accuracy of electronic hanging scales is of great importance.

[0003] The existing method of calibrating electronic hanging scales using a force standard device has the following problems: it is difficult to install large-range electronic hanging scales, and the operation safety is poor. Currently, the large-range hanging scales produced by manufacturers are large in size and heavy in weight. The weight of some electronic hanging scales with a capacity of hundreds of tons produced by individual manufacturers is about 1 ton, and the hooks at both ends of the electronic hanging scale are of a special hinge structure. Therefore, it is very difficult for calibration personnel to send a hanging scale weighing several tons to the calibration area manually or mechanically, which is time-consuming and laborious during calibration installation and poses a great safety hazard. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic loading and unloading mechanism for an electronic hanging scale, which realizes automatic installation and automatic positioning during the calibration of the electronic hanging scale and improves the loading and unloading efficiency.

[0005] The present invention is realized as follows: an automatic loading and unloading mechanism for an electronic hanging scale includes an upper pull head, a swivel joint, a moving seat and a cantilever bracket. The moving seat is slidably connected to the cantilever bracket. The swivel joint has a convex portion, and the swivel joint is slidably connected to the moving seat up and down. The convex portion can catch the moving seat. The swivel joint is also fixedly connected to the upper pull head. The swivel joint is provided with a profile groove for cooperating and connecting with a pull rod.

[0006] Furthermore, it further includes a lead screw, a servo motor and a bearing seat. There are two bearing seats which are respectively fixed at both ends of the cantilever bracket. The two ends of the lead screw are respectively rotatably connected to the bearing seats. The lead screw passes through the moving seat and is threadedly connected. The body of the servo motor is fixedly connected to one of the bearing seats, and the output shaft of the servo motor is drivingly connected to the lead screw.

[0007] Furthermore, it further includes a linear guide rail and a linear slider. The linear guide rail is fixedly connected to the cantilever bracket, and the linear slider is fixedly connected to the moving seat. The linear slider is slidably connected to the linear guide rail.

[0008] Furthermore, the profile groove is an inverted "T" shaped groove.

[0009] Furthermore, the moving seat is provided with a mounting hole, the adapter is slidably connected up and down to the mounting hole, and the adapter is located at the central position of the moving seat.

[0010] The present invention has the following advantages: solving the problems of poor safety and high working intensity in manual installation during the installation of the hanging scale, realizing full-automatic installation and automatic positioning; cooperating with the servo motor to accurately adjust the moving position of the hanging scale; operating stably, safely and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings in conjunction with embodiments.

[0012] Figure 1 is a schematic three-dimensional view of the structure of the automatic loading and unloading mechanism of the electronic hanging scale of the present invention.

[0013] Figure 2 is a schematic front view of the plane of the automatic loading and unloading mechanism of the electronic hanging scale of the present invention.

[0014] Figure 3 is Figure 2 the right view of.

[0015] Figure 4 is Figure 2 the top view of.

[0016] Figure 5 is a schematic diagram of the structure of the moving seat in the present invention.

[0017] Figure 6 is a schematic diagram of the automatic loading and unloading mechanism of the electronic hanging scale of the present invention installed on the moving cross beam.

[0018] Figure 7 is Figure 6 the sectional view taken along the line A-A of.

[0019] Figure 8 is a schematic three-dimensional view of the structure of the stacking mechanism in the embodiment of the present invention.

[0020] Figure 9 is a schematic diagram of the automatic loading and unloading mechanism of the electronic hanging scale of the present invention located on the calibration rack.

[0021] Reference numerals in the drawings: automatic loading and unloading mechanism 1 of electronic hanging scale, upper pulling head 11, adapter 12, convex portion 121, groove 122, moving seat 13, mounting hole 131, cantilever bracket 14, lead screw 15, servo motor 16, bearing seat 17, linear guide rail 18, linear slider 19, moving cross beam 2, stacking mechanism 3, test pressing plate 31, pressing head 32, standard sensor 33, oil cylinder 34, piston 341, pull rod 35, substrate 36, calibration rack 4, lower pulling head 41. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Refer to Figures 1 to 9 , a preferred embodiment of the automatic loading and unloading mechanism 1 of the electronic hanging scale of the present invention; including an upper pulling head 11, a swivel joint 12, a moving seat 13 and a cantilever bracket 14. The moving seat 13 is slidably connected to the cantilever bracket 14. The swivel joint 12 has a convex portion 121. The swivel joint 12 is slidably connected to the moving seat 13 up and down. The convex portion 121 can catch the moving seat 13. The swivel joint 12 is also fixedly connected to the upper pulling head 11. The swivel joint 12 is provided with a groove 122 for cooperating and connecting with a pull rod 35. When in use, the cantilever bracket 14 is fixedly connected to the moving cross beam 2 by screws. When installing the electronic hanging scale, the staff connects the upper hook portion of the electronic hanging scale to the upper pulling head 11 through a pin. Then the moving seat 13 moves along the cantilever bracket 14, and the swivel joint 12, the upper pulling head 11 and the electronic hanging scale move along with the moving seat 13. When moving to the position where the pull rod 35 is located, the lower end of the pull rod 35 enters the groove 122 of the swivel joint 12. Since the shape of the lower end of the pull rod 35 matches the shape of the groove 122, when the pull rod 35 moves upward, the pull rod 35 can lift the swivel joint 12 to apply an upward force to the electronic hanging scale. When unloading the electronic hanging scale, the pull rod 35 does not work, and the swivel joint 12 is caught on the moving seat 13 by the convex portion 121; the moving seat 13 moves away from the pull rod 35 towards the replacement point, and the groove 122 of the swivel joint 12 disengages from the lower end of the pull rod 35. After the moving seat 13 transports the electronic hanging scale to the replacement point, the staff pulls out the pin and then unloads the electronic hanging scale.

[0023] It further includes a lead screw 15, a servo motor 16 and a bearing seat 17. There are two bearing seats 17 which are respectively fixed at both ends of the cantilever bracket 14. The two ends of the lead screw 15 are respectively rotatably connected to the bearing seats 17. The lead screw 15 passes through the moving seat 13 and is threadedly connected. The body of the servo motor 16 is fixedly connected to one of the bearing seats 17, and the output shaft of the servo motor 16 is drivingly connected to the lead screw 15. The servo motor 16 rotates the lead screw 15 forward or backward to move the moving seat 13 back and forth; the servo motor 16 is connected to the control system, so that the staff can remotely control the servo motor 16 to adjust the displacement of the moving seat 13, thereby adjusting the position of the electronic hanging scale.

[0024] It further includes a linear guide rail 18 and a linear slider 19. The linear guide rail 18 is fixedly connected to the cantilever bracket 14, and the linear slider 19 is fixedly connected to the moving seat 13. The linear slider 19 is slidably connected to the linear guide rail 18. This makes the movement of the moving seat 13 more stable and reduces the shaking during the conveying process.

[0025] The shaped groove 122 is an inverted "T" shaped groove 122. The lower end of the pull rod 35 is also in an inverted "T" shape, with a simple structure and firm fit. The moving seat 13 is provided with a mounting hole 131, and the adapter 12 is slidably connected up and down to the mounting hole 131. The adapter 12 is located at the center of the moving seat 13.

[0026] The automatic loading and unloading mechanism 1 of the electronic hanging scale of the present invention is used for installing and disassembling the electronic hanging scale to be verified; referring again to Figures 6 to 8 , when verifying the electronic hanging scale in a stacking manner, the automatic loading and unloading mechanism 1 of the electronic hanging scale of the present invention is fixedly connected to the moving crossbeam 2 through its cantilever bracket 14. The moving seat 13 is located below the moving crossbeam 2; a stacking mechanism 3 is further provided on the moving crossbeam 2. The stacking mechanism 3 includes a test pressing plate 31, a pressing head 32, a standard sensor 33, an oil cylinder 34 and a pull rod 35. The cylinder body of the oil cylinder 34 is fixedly connected to the moving crossbeam 2. A substrate 36 is fixedly provided on the piston 341 of the oil cylinder 34. The substrate 36 is located above the moving crossbeam 2. The standard sensor 33 is fixedly provided on the substrate 36. The pressing head 32 is fixedly connected to the test pressing plate 31. The pressing head 32 abuts against the standard sensor 33. The pull rod 35 passes through the central holes of the oil cylinder 34 and the substrate 36 and is slidably connected. The upper end of the pull rod 35 is fixedly connected to the test pressing plate 31; the lower end of the pull rod 35 is connected in cooperation with the shaped groove 122 of the adapter 12. The stacking mechanism 3 is a device for providing a stacking force source during the verification of the electronic hanging scale.

[0027] Referring again to Figure 9 , during the verification work, the moving crossbeam 2 is installed on the verification rack 4. The upper hook part of the electronic hanging scale is fixedly connected to the upper pulling head 11, and the lower hook part of the electronic hanging scale is fixedly connected to the lower pulling head 41. The position of the lower pulling head 41 is fixed; when the piston 341 of the oil cylinder 34 moves upward, it drives the standard sensor 33, the pressing head 32 and the test pressing plate 31 on the substrate 36 to move upward. At this time, the standard sensor 33 applies an upward acting force to the pressing head 32. The pressing head 32 and the standard sensor 33 are positioned through the central hole. The lower end of the pull rod 35 pulls the adapter 12 upward. The upper pulling head 11 connected to the adapter 12 is equipped with an electronic hanging scale, so as to apply an upward acting force to the electronic hanging scale. The acting force value applied by the oil cylinder 34 can be detected on the standard sensor 33, and the acting force value is also displayed on the electronic hanging scale. The electronic hanging scale is verified by comparing these two acting force values.

[0028] After the verification work is completed, the piston 341 of the oil cylinder 34 returns downward, so that the pull rod 35 does not exert a force on the adapter 12. The servo motor 16 drives the lead screw 15 to rotate, and the moving seat 13 moves away from the pull rod 35. The lower end of the pull rod 35 disengages from the groove 122 of the adapter 12. After the moving seat 13 moves to the replacement point, the staff removes the electronic hanging scale.

[0029] Although the specific embodiments of the present invention have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be covered by the scope protected by the claims of the present invention.

Claims

1. An automatic loading and unloading mechanism for an electronic hanging scale, characterized in that: It includes an upper pull head, an adapter, a moving seat and a cantilever bracket. The moving seat is slidably connected to the cantilever bracket. The adapter has a convex part. The adapter is slidably connected to the moving seat up and down. The convex part can catch the moving seat. The adapter is also fixedly connected to the upper pull head. The adapter is provided with a profile groove for cooperating and connecting with a pull rod. It further includes a lead screw, a servo motor and a bearing block. There are two bearing blocks which are respectively fixed at both ends of the cantilever bracket. Both ends of the lead screw are rotatably connected to the bearing blocks. The lead screw passes through the moving seat and is threadedly connected. The body of the servo motor is fixedly connected to one of the bearing blocks. The output shaft of the servo motor is drivingly connected to the lead screw. It further includes a linear guide rail and a linear slider. The linear guide rail is fixedly connected to the cantilever bracket. The linear slider is fixedly connected to the moving seat. The linear slider is slidably connected to the linear guide rail.

2. The automatic loading and unloading mechanism for an electronic hanging scale according to claim 1, characterized in that: The profile groove is an inverted "T" shaped groove.

3. The automatic loading and unloading mechanism for an electronic hanging scale according to claim 1, characterized in that: The moving seat is provided with a mounting hole. The adapter is slidably connected up and down in the mounting hole. The adapter is located at the central position of the moving seat.

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