Electronic checkweigher circuit monitoring device

Abstract

The invention relates to the technical field of circuit monitoring, in particular to an electronic checkweigher circuit monitoring device which comprises a fixed frame and a fixed top cover fixed to the top face of the fixed frame. The wiring devices are arranged at the front end and the rear end of the fixing frame, the transmission devices are arranged at the corners in the fixing frame, and the monitoring assembly is used for monitoring a circuit in real time. According to the electronic checkweigher circuit monitoring device, a fixed top cover is buckled on the top surface of a fixed frame, a pressing toothed plate is driven to move, barrel teeth are rotated to drive a whole wiring device to move towards the position of a monitoring assembly, the time and energy of manual wiring are saved through an automatic wiring mechanism, and meanwhile, through cooperation with an extrusion part, the wiring efficiency is improved. The stability of connection between the gravity sensor and the line connector is ensured, and the phenomenon that the data line is worn due to external force pulling is effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of circuit monitoring, in particular to a circuit monitoring device for an electronic checkweigher. Background Art

[0002] The circuit monitoring device of the electronic checkweigher is an important part of the electronic checkweigher. It is designed based on the working principle of the resistance strain gauge. When an object is placed on the scale of the electronic checkweigher, the scale will deform slightly, and this deformation is converted into a voltage signal through the full-bridge circuit. The circuit monitoring device ensures the stability and accuracy of the signal, and can reduce the impact of external interference on the weighing result, thereby achieving high precision and stability of the electronic checkweigher.

[0003] The patent with application number CN202123185489.9 discloses a monitoring device for transformer circuits, including a monitoring box body, a mounting frame fixedly installed on the back of the monitoring box body, and a port fixedly installed on the top of the monitoring box body. By setting up a multi-functional detection mechanism, the monitoring box body is installed in the transformer through the mounting frame to monitor the circuit. The partial discharge signal monitor can measure and monitor the electric field of the transformer. When the internal circuit of the monitoring box body is short-circuited or broken, the alarm device can send a signal to prompt the staff to repair it. This solves the problems of the existing monitoring device with simple functional structure, less monitoring content, and failure to detect some problems in time.

[0004] In the process of connecting the existing circuit monitoring device with the gravity sensor of the electronic checkweigher, it is often necessary to separate the multiple wires in the sensor circuit and only connect the copper wire to the wiring element. This operation not only easily causes the data cable to wear due to external force when the equipment is moved, shortening the service life, but also greatly increases the manual wiring time. In addition, the internal monitoring components of the circuit monitoring device are mostly fixed with screws, but the device is small in size and the screws are correspondingly small, which brings considerable difficulty to subsequent inspection and maintenance. It is difficult for workers to quickly and easily remove the monitoring components for maintenance.

[0005] In view of this, we propose a circuit monitoring device for an electronic checkweigher. Summary of the invention

[0006] The object of the present invention is to provide a circuit monitoring device for an electronic checkweigher to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: An electronic checkweigher circuit monitoring device comprises a fixed frame, a fixed top cover fixed on the top surface of the fixed frame, wiring devices arranged at the front and rear ends of the fixed frame, a transmission device arranged at the inner corner of the fixed frame, and a monitoring component for real-time monitoring of the circuit; The fixed frame includes an outer casing body and a plurality of guide blocks symmetrically arranged front and back; The wiring device comprises a moving part, a plurality of line connectors arranged inside the moving part, and a pressing part arranged below the line connectors; The moving part includes a moving slider, a fixed tooth plate arranged on the outer side walls of the left and right ends of the moving slider, and a plurality of regularly distributed pressing teeth; The extrusion part includes a sliding plate and extrusion teeth that move as the sliding plate moves; The transmission device includes a lower pressure tooth plate, a rotating cylinder tooth that rotates as the lower pressure tooth plate moves, a spiral spring arranged inside the rotating cylinder tooth, and a limiter that cooperates with the rotating cylinder tooth to rotate; The limiting part includes a screw rod that rotates with the rotation of the rotating cylinder teeth and a limiting plug block that moves with the rotation of the screw rod; The monitoring assembly includes a fixed box body, a monitoring module arranged inside the fixed box body, a plurality of docking sockets arranged at the front and rear ends of the fixed box body and used to match the line connector, and an outer convex frame block arranged at the outer side wall corners at the front and rear ends of the fixed box body.

[0008] In the technical solution of the present invention, four limiting protrusions distributed in a matrix are welded and fixed on the inner bottom surface of the outer jacket frame, the area enclosed by the four limiting protrusions is adapted to the external dimensions of the monitoring component, and frame slide grooves with T-shaped transverse cross-sections are provided at the corners of the top surface of the outer jacket frame.

[0009] In the technical solution of the present invention, the guide block is welded and fixed to the inner bottom surface of the outer jacket frame, the fixed top cover is snap-fitted and fixed to the top surface of the outer jacket frame, and an openable flap is provided at the center of the top surface of the fixed top cover.

[0010] In the technical solution of the present invention, the movable slider is slidably connected to the inner bottom surface of the outer sleeve frame, and the interior of the movable slider is provided with four block sliding grooves which pass through from front to back and have a T-shaped longitudinal cross-section, and the fixed tooth plate is clamped and fixed to the outer wall of the movable slider.

[0011] In the technical solution of the present invention, the pressing teeth are welded and fixed to the outer wall of the movable slider, and the interior of the movable slider is clamped and fixed above the block slide groove with a line connector for connecting to the data line of the gravity sensor inside the electronic checkweigher.

[0012] In the technical solution of the present invention, the sliding plate is slidably connected to the inside of the block slide groove, the top surface of the sliding plate is clamped and fixed to the limiting telescopic rod below the pressing tooth, a pressure spring is sleeved on the outer side of the limiting telescopic rod, the bottom surface of the extruding tooth is clamped and fixed to the top of the limiting telescopic rod, and the elastic force provided by the pressure spring is used to push the extruding tooth to move upward.

[0013] In the technical solution of the present invention, the lower pressure tooth plate is slidably connected to the inside of the frame slide groove, the rotating cylinder teeth are rotatably connected to the inner wall of the outer jacket frame, the rotating cylinder teeth are respectively meshed with the fixed tooth plate and the lower pressure tooth plate, a fixing rod is welded and fixed at the center position of the spiral spring, the outer end of the spiral spring is clamped and fixed to the inner wall of the rotating cylinder teeth, and the end position of the fixing rod is clamped and fixed to the inner wall of the outer jacket frame.

[0014] In the technical solution of the present invention, the limiting portion also includes a bending plate for providing a rotation range for the screw rod, a fixing tube arranged on the inner side wall of the bending plate, and a rod end gear clamped and fixed at the end position of the screw rod. The transverse cross-section of the bending plate is L-shaped, and the fixing tube is clamped and fixed on the outer side wall of the bending plate.

[0015] In the technical solution of the present invention, the screw rod is rotatably connected to the outer wall of the bending plate, the inner end of the screw rod is rotatably connected to the inner wall of the fixed tube, the rod end gear is meshed with the rotating cylinder teeth, and the outer circular plate of the limit plug is threadedly connected to the screw rod and slidably connected to the inside of the fixed tube.

[0016] In the technical solution of the present invention, the fixed box body is snap-fitted and fixed to the inner bottom surface of the outer casing frame body, the monitoring module is fixedly connected to the inside of the fixed box body by screws, the docking socket and the convex frame block are both fixedly connected to the fixed box body by screws, and the groove inside the inner frame of the convex frame block is adapted to the square size of the end of the limit plug block.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The circuit monitoring device of the electronic checkweigher can buckle the fixed top cover on the top surface of the fixed frame, drive the downward pressure tooth plate to move, and drive the wiring device as a whole to move toward the position of the monitoring component by rotating the barrel teeth. The automatic wiring mechanism saves time and energy for manual wiring, and cooperates with the extrusion part to ensure the stability of the connection between the gravity sensor and the line connector, effectively preventing the data line from being worn out due to external force.

[0018] 2. In the circuit monitoring device of the electronic checkweigher, the rotating cylinder teeth inside the transmission device rotate while the lead screw in the limit part rotates at the same time, and the limit plug block is cooperated to ensure the stability of the monitoring component inside the outer casing. The quick assembly and disassembly structure facilitates the subsequent inspection and maintenance of the entire monitoring component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2It is one of the partial structural schematic diagrams of the present invention; Figure 3 It is a structural schematic diagram of the fixing frame in the present invention; Figure 4 It is a schematic diagram of the structure of the fixed top cover in the present invention; Figure 5 This is the second schematic diagram of the partial structure of the present invention; Figure 6 It is a structural schematic diagram of the wiring device in the present invention; Figure 7 It is a structural schematic diagram of the moving part in the present invention; Figure 8 It is a structural schematic diagram of the extrusion part in the present invention; Fig. 9 It is a structural schematic diagram of the line connector in the present invention; Fig.10 It is a structural schematic diagram of the transmission device in the present invention; Fig.11 It is a partial structural cutaway schematic diagram of the transmission device in the present invention; Fig.12 It is a schematic cross-sectional view of the structure of the limiting part in the present invention; Fig.13 It is a structural schematic diagram of the monitoring component in the present invention; Description of reference numerals: 100, fixed frame; 110, outer frame; 111, frame slide; 120, limiting convex block; 130, guide block; 200, fixing the top cover; 300, wiring device; 310, moving part; 311, moving slider; 3110, block slide; 312, fixed tooth plate; 313, pressing tooth; 320, extrusion part; 321, sliding plate; 322, position limiting telescopic rod; 323, pressure spring; 324, extrusion tooth; 330, line connector; 400, transmission device; 410, lower pressure tooth plate; 420, rotating cylinder tooth; 430, scroll spring; 440, fixing rod; 450, limiting part; 451, bending plate; 452, fixing tube; 453, screw rod; 454, rod end gear; 455, limiting plug; 500, monitoring component; 510, fixed box body; 520, monitoring module; 530, docking socket; 540, convex frame block. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 13 As shown, this embodiment provides a technical solution: A circuit monitoring device for an electronic checkweigher includes a fixed frame 100, a fixed top cover 200 fixed on the top surface of the fixed frame 100, a wiring device 300 arranged at the front and rear ends of the fixed frame 100, a transmission device 400 arranged at the inner corner position of the fixed frame 100, and a monitoring component 500 for real-time monitoring of the circuit; In this embodiment, Figure 3-Figure 4 , the fixed frame 100 includes an outer casing body 110 and a plurality of guide blocks 130 symmetrically arranged front and rear; Specifically, four limiting protrusions 120 distributed in a matrix are welded and fixed on the inner bottom surface of the outer jacket frame 110. The area enclosed by the four limiting protrusions 120 is compatible with the external dimensions of the monitoring component 500. The top surface corners of the outer jacket frame 110 are provided with frame slide grooves 111 with a T-shaped transverse cross-section.

[0022] Furthermore, the guide block 130 is welded and fixed to the inner bottom surface of the outer casing frame 110 , the fixed top cover 200 is snap-fitted and fixed to the top surface of the outer casing frame 110 , and an openable flap is provided at the center of the top surface of the fixed top cover 200 .

[0023] Furthermore, the outer shell frame 110 is used to ensure the strength of the overall structure of the fixed frame 100, the frame slide groove 111 is used to provide a moving range for the structure in the transmission device 400, the limiting protrusion 120 is used to limit the placement area of ​​the monitoring component 500, the guide block 130 is used to allow the structure in the wiring device 300 to shift, and the fixed top cover 200 cooperates with the fixed frame 100 to ensure that the monitoring component 500 is not interfered with by external factors.

[0024] In this embodiment, Figure 5-Figure 9 As shown, the wiring device 300 includes a moving portion 310, a plurality of line connectors 330 disposed inside the moving portion 310, and a pressing portion 320 disposed below the line connectors 330; Specifically, the moving portion 310 includes a moving slider 311 , a fixed tooth plate 312 disposed on the outer side walls of the left and right ends of the moving slider 311 , and a plurality of regularly distributed pressing teeth 313 .

[0025] Furthermore, the movable slider 311 is slidably connected to the inner bottom surface of the outer sleeve frame 110 , and four block slide grooves 3110 with a T-shaped longitudinal cross section are opened inside the movable slider 311 , and the fixed tooth plate 312 is clamped and fixed to the outer wall of the movable slider 311 .

[0026] Furthermore, the pressing teeth 313 are welded and fixed to the outer wall of the movable slider 311 , and a line connector 330 for connecting to the data line of the gravity sensor inside the electronic checkweigher is fixed inside the movable slider 311 above the block slide groove 3110 .

[0027] Furthermore, the movable slider 311 is used to provide a placement base point for several line connectors 330, the block slide groove 3110 is used to provide a moving range for the structure in the extrusion part 320, the fixed tooth plate 312 cooperates with the device in the transmission device 400 to move, and the pressure tooth 313 is used to cooperate with the structure in the extrusion part 320 to ensure that the data line connection in the gravity sensor is stable. After the fixed tooth plate 312 is in position, it drives several line connectors 330 to move toward the direction of the monitoring component 500.

[0028] In this embodiment, Figure 7-Figure 8 As shown, the extrusion portion 320 includes a sliding plate 321 and an extrusion tooth 324 that moves as the sliding plate 321 moves; Specifically, the sliding plate 321 is slidably connected to the inside of the block slide groove 3110, and the top surface of the sliding plate 321 is clamped and fixed to the limiting telescopic rod 322 below the pressing tooth 313. The outer side of the limiting telescopic rod 322 is sleeved with a pressure spring 323, and the bottom surface of the extrusion tooth 324 is clamped and fixed to the top of the limiting telescopic rod 322. The elastic force provided by the pressure spring 323 is used to push the extrusion tooth 324 to move upward.

[0029] Furthermore, when the moving part 310 moves as a whole toward the monitoring component 500, the bottom surface of the sliding plate 321 contacts the top surface of the guide block 130, and moves upward in the block slide groove 3110, thereby increasing the elastic potential energy of the pressure spring 323, thereby increasing the force applied by the pressure spring 323 to the extrusion tooth 324.

[0030] In this embodiment, Figure 10-11 As shown, the transmission device 400 includes a lower pressure tooth plate 410, a rotating cylinder tooth 420 that rotates as the lower pressure tooth plate 410 moves, a spiral spring 430 disposed inside the rotating cylinder tooth 420, and a limiting portion 450 that cooperates with the rotating cylinder tooth 420 to rotate; Specifically, the lower pressure tooth plate 410 is slidably connected to the inside of the frame slide groove 111, and the rotating cylindrical teeth 420 are rotatably connected to the inner wall of the outer jacket frame 110. The rotating cylindrical teeth 420 are respectively meshed with the fixed tooth plate 312 and the lower pressure tooth plate 410. A fixing rod 440 is welded and fixed at the center position of the spiral spring 430. The outer end of the spiral spring 430 is clamped and fixed to the inner wall of the rotating cylindrical teeth 420, and the end position of the fixing rod 440 is clamped and fixed to the inner wall of the outer jacket frame 110.

[0031] Furthermore, after the fixed top cover 200 is buckled onto the top surface of the outer jacket frame 110, the fixed tooth plate 312 moves downward after being subjected to force, and drives the rotating cylindrical tooth 420 to rotate, and then the rotating cylindrical tooth 420 contacts the fixed tooth plate 312, and drives the moving slider 311 to move. When the monitoring component 500 is subsequently inspected and maintained, when the fixed top cover 200 is opened, the spiral spring 430 in the rotating cylindrical tooth 420 drives the rotating cylindrical tooth 420 to rotate, and cooperates with the rotating screw 453 and the moving slider 311 to complete the disassembly of the monitoring component 500.

[0032] In this embodiment, Figure 10-12 As shown, the limiting portion 450 includes a screw rod 453 that rotates as the rotating cylinder gear 420 rotates, and a limiting plug block 455 that moves as the screw rod 453 rotates; Specifically, the limiting portion 450 also includes a bending plate 451 for providing a rotation range for the screw rod 453, a fixing tube 452 arranged on the inner wall of the bending plate 451, and a rod end gear 454 fixed at the end position of the screw rod 453 by clamping. The transverse cross-section of the bending plate 451 is L-shaped, and the fixing tube 452 is fixed on the outer wall of the bending plate 451 by clamping.

[0033] Furthermore, the screw rod 453 is rotatably connected to the outer wall of the bending plate 451, the inner end of the screw rod 453 is rotatably connected to the inner wall of the fixed tube 452, the rod end gear 454 is meshed with the rotating cylinder gear 420, and the outer circular plate of the limit plug 455 is threadedly connected to the screw rod 453 and slidably connected to the inside of the fixed tube 452.

[0034] Furthermore, when the rotating cylinder tooth 420 rotates, the rod end gear 454 meshing therewith rotates, driving the screw rod 453 to rotate, thereby causing the limit plug 455 to move inside the fixed tube 452, thereby causing the limit plug 455 to move toward the direction of the monitoring component 500.

[0035] In this embodiment, Fig.13As shown, the monitoring assembly 500 includes a fixed box body 510, a monitoring module 520 disposed inside the fixed box body 510, a plurality of docking sockets 530 disposed at the front and rear ends of the fixed box body 510 and used to cooperate with the line connector 330, and an outer convex frame block 540 disposed at the outer side wall corners of the front and rear ends of the fixed box body 510; Furthermore, the fixed box body 510 is snap-fixed on the inner bottom surface of the outer shell frame 110, the monitoring module 520 is fixedly connected to the inside of the fixed box body 510 by screws, the docking socket 530 and the convex frame block 540 are both fixedly connected to the fixed box body 510 by screws, and the groove inside the inner frame of the convex frame block 540 is adapted to the square size of the end of the limit plug 455.

[0036] Furthermore, the fixed box body 510 is used to provide a placement area for the monitoring module 520, and the docking socket 530 is used to cooperate with the line connector 330 to send the circuit signal of the gravity sensor data line into the interior of the monitoring module 520. After the limit plug 455 is inserted into the interior of the outer convex frame block 540, the entire monitoring component 500 is limited.

[0037] When the electronic checkweigher circuit monitoring device of the present invention is used, first, the circuits in the gravity sensor and the weight display data line are separated and directly inserted into the line connector 330 in the wiring device 300, and the fixed top cover 200 is buckled on the top surface of the outer casing frame 110; At this time, the fixed tooth plate 312 in the transmission device 400 moves downward after receiving the force, driving the rotating cylinder teeth 420 to rotate, and then the rotating cylinder teeth 420 contact the fixed tooth plate 312, driving the moving slider 311 to move inward; Next, when the moving slider 311 moves toward the monitoring assembly 500, the line connector 330 is inserted into the docking socket 530. At the same time, the sliding plate 321 in the extrusion portion 320 contacts the top surface of the guide block 130 during the movement, and moves upward in the block slide groove 3110, thereby increasing the elastic potential energy of the pressure spring 323, thereby increasing the force applied by the pressure spring 323 to the extrusion tooth 324. When the rotating cylinder gear 420 rotates, the rod end gear 454 meshing therewith rotates, driving the screw rod 453 to rotate, thereby causing the limiting plug block 455 to move inside the fixed tube 452, thereby inserting into the inside of the outer convex frame block 540, and limiting the entire monitoring assembly 500; When the monitoring component 500 is subsequently inspected and maintained, while the fixed top cover 200 is opened, the spiral spring 430 in the rotating cylinder tooth 420 will drive the rotating cylinder tooth 420 to rotate, and cooperate with the rotating screw 453 and the moving slider 311 to complete the disassembly of the monitoring component 500.

[0038] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. A circuit monitoring device for an electronic checkweigher, comprising a fixed frame (100), a fixed top cover (200) fixed on the top surface of the fixed frame (100), a wiring device (300) arranged at the front and rear ends of the fixed frame (100), a transmission device (400) arranged at the inner corner of the fixed frame (100), and a monitoring component (500) for real-time monitoring of the circuit; Features: The fixed frame (100) comprises an outer casing body (110) and a plurality of guide blocks (130) symmetrically arranged front and rear; The wiring device (300) comprises a moving part (310), a plurality of line connectors (330) arranged inside the moving part (310), and a pressing part (320) arranged below the line connectors (330); The moving part (310) comprises a moving slider (311), a fixed tooth plate (312) arranged on the outer side walls at the left and right ends of the moving slider (311), and a plurality of regularly distributed pressing teeth (313); The extrusion portion (320) comprises a sliding plate (321) and extrusion teeth (324) that move as the sliding plate (321) moves; The transmission device (400) comprises a lower pressure tooth plate (410), a rotating cylindrical tooth (420) that rotates as the lower pressure tooth plate (410) moves, a spiral spring (430) disposed inside the rotating cylindrical tooth (420), and a limiting portion (450) that rotates in coordination with the rotating cylindrical tooth (420); The limiting portion (450) comprises a screw rod (453) that rotates as the rotating cylindrical teeth (420) rotate, and a limiting plug block (455) that moves as the screw rod (453) rotates; The monitoring assembly (500) comprises a fixed box body (510), a monitoring module (520) arranged inside the fixed box body (510), a plurality of docking sockets (530) arranged at the front and rear ends of the fixed box body (510) and used to cooperate with the line connector (330), and an outer convex frame block (540) arranged at the outer side wall corners of the front and rear ends of the fixed box body (510).

2. The electronic checkweigher circuit monitoring device according to claim 1, characterized in that: Four limiting protrusions (120) arranged in a matrix are welded and fixed on the inner bottom surface of the outer jacket frame (110); the area enclosed by the four limiting protrusions (120) is compatible with the external dimensions of the monitoring component (500); and frame sliding grooves (111) with a T-shaped transverse cross section are provided at the corner positions of the top surface of the outer jacket frame (110).

3. The electronic checkweigher circuit monitoring device according to claim 1, characterized in that: The guide block (130) is welded and fixed to the inner bottom surface of the outer jacket frame (110), the fixed top cover (200) is snap-fitted and fixed to the top surface of the outer jacket frame (110), and an openable flap is provided at the center of the top surface of the fixed top cover (200).

4. The electronic checkweigher circuit monitoring device according to claim 1, characterized in that: The movable slider (311) is slidably connected to the inner bottom surface of the outer casing frame (110); four block slide grooves (3110) are provided inside the movable slider (311) and are connected front to back and have a T-shaped longitudinal cross section; the fixed tooth plate (312) is clamped and fixed to the outer side wall of the movable slider (311).

5. The electronic checkweigher circuit monitoring device according to claim 1, characterized in that: The pressing teeth (313) are welded and fixed to the outer wall of the movable slider (311), and a line connector (330) for connecting to a data line of a gravity sensor inside an electronic checkweigher is fixedly engaged with the inside of the movable slider (311) above the block slide groove (3110).

6. The electronic checkweigher circuit monitoring device according to claim 5, characterized in that: The sliding plate (321) is slidably connected to the inside of the block slide groove (3110); the top surface of the sliding plate (321) is clamped and fixed to the limiting telescopic rod (322) below the pressing tooth (313); a pressure spring (323) is sleeved on the outer side of the limiting telescopic rod (322); the bottom surface of the extrusion tooth (324) is clamped and fixed to the top of the limiting telescopic rod (322); the elastic force provided by the pressure spring (323) is used to push the extrusion tooth (324) to move upward.

7. The electronic checkweigher circuit monitoring device according to claim 2, characterized in that: The lower pressure tooth plate (410) is slidably connected to the inside of the frame slide groove (111), and the rotating cylindrical tooth (420) is rotatably connected to the inner wall of the outer jacket frame (110). The rotating cylindrical tooth (420) is respectively meshed with the fixed tooth plate (312) and the lower pressure tooth plate (410). A fixing rod (440) is welded and fixed at the center position of the spiral spring (430), and the outer end of the spiral spring (430) is clamped and fixed to the inner wall of the rotating cylindrical tooth (420), and the end position of the fixing rod (440) is clamped and fixed to the inner wall of the outer jacket frame (110).

8. The electronic checkweigher circuit monitoring device according to claim 1, characterized in that: The limiting portion (450) further comprises a bending plate (451) for providing a rotation range for the screw rod (453), a fixing tube (452) arranged on the inner side wall of the bending plate (451), and a rod end gear (454) fixedly connected to the end position of the screw rod (453); the transverse cross section of the bending plate (451) is L-shaped, and the fixing tube (452) is fixedly connected to the outer side wall of the bending plate (451).

9. The electronic checkweigher circuit monitoring device according to claim 8, characterized in that: The screw rod (453) is rotatably connected to the outer wall of the bending plate (451), the inner end of the screw rod (453) is rotatably connected to the inner wall of the fixed tube (452), the rod end gear (454) is meshed with the rotating cylinder gear (420), and the outer circular plate of the limiting plug block (455) is threadedly connected to the screw rod (453) and slidably connected to the inside of the fixed tube (452).

10. The electronic checkweigher circuit monitoring device according to claim 1, characterized in that: The fixed box body (510) is snap-fitted and fixed to the inner bottom surface of the outer casing frame body (110); the monitoring module (520) is fixedly connected to the inside of the fixed box body (510) by screws; the docking socket (530) and the convex frame block (540) are both fixedly connected to the fixed box body (510) by screws; the inner groove of the inner frame of the convex frame block (540) is adapted to the size of the square at the end of the limit plug (455).

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