Automatic weighing device

Abstract

The utility model relates to the technical field of weighing devices, in particular to an automatic weighing device which comprises a U-shaped frame, a driving shaft and a driven shaft are rotatably connected between the front side and the rear side of the inner wall of the U-shaped frame, four first connecting wheels are arranged on the outer wall of the driving shaft, and four second connecting wheels are arranged on the outer wall of the driven shaft. The first connecting wheel and the second connecting wheel which are oppositely arranged left and right are jointly connected with a conveying belt, an electric telescopic rod is arranged in the middle of the bottom of the U-shaped frame, the end of a movable rod of the electric telescopic rod penetrates through the receding hole a and is fixedly connected with a round fixing block, and the round fixing block is connected with a weighing assembly. According to the automatic weighing device, in the weighing and unloading process, the electric telescopic rod drives the weighing assembly to move up and down, so that materials are stably placed on the conveying belt, damage to the materials due to gravity or fall is avoided, the automatic weighing device is particularly suitable for weighing fragile objects, and the damage rate of the materials is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing devices, in particular to an automatic weighing device. Background Art

[0002] Weighing devices are widely used in various industrial, commercial and daily life scenarios. Traditional weighing devices usually consist of a weighing platform and a weighing sensor. When an object is placed on the weighing platform, the sensor measures the weight of the object and displays the weight value on a digital display. However, traditional weighing devices usually require manual operation. The user must manually place the object on the weighing platform and record the result after the reading stabilizes. This operation method is acceptable in low-frequency weighing applications, but in large-scale production, logistics sorting, automated retail and other occasions, as demand increases, the efficiency of this method is obviously difficult to meet the demand, which can easily cause bottlenecks and affect overall production and operational efficiency. In addition, during the manual weighing process, weighing errors may be caused by improper operation, which in turn affects the accuracy and reliability of the data.

[0003] Patent publication number CN218211559U discloses an automatic weighing device, which includes a housing, two connecting shafts rotatably disposed within the housing, a first motor fixedly mounted on the rear side of the housing, the first motor fixedly connected to the rear end of the connecting shaft on the left side, rollers fixedly sleeved on the outsides of the two connecting shafts, a conveyor belt driven on the two rollers, a material box fixedly mounted on the top side of the housing, a rotating shaft rotatably disposed within the housing, a block fixedly sleeved on the outside of the rotating shaft, a material tray fixedly mounted on the block, a weighing sensor fixedly mounted on the bottom side of the material tray, and a second motor fixedly mounted on the rear side of the housing. This utility model has a reasonable structural design, can easily achieve automatic weighing and unloading and conveying, and has good performance, high work efficiency, and high reliability.

[0004] In the above-mentioned prior art, materials are weighed by a weighing sensor during the weighing process. After weighing is completed, the second motor drives the threaded shaft to rotate, causing the moving block to drive the rack to move through the cross plate, and the rotating shaft to rotate through the gear, and finally the material tray to rotate through the clamping block. Although this process combines weighing and unloading, the operation steps are relatively cumbersome, and during the material unloading process, the material will fall directly onto the conveyor belt due to gravity. This method is not only prone to damage to materials, especially fragile items, but may also cause accelerated wear of the conveyor belt, thereby increasing maintenance costs and downtime, affecting production efficiency. In view of this, we propose an automatic weighing device. Utility Model Content

[0005] The purpose of the present invention is to provide an automatic weighing device to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An automatic weighing device includes a U-shaped frame, which serves as the main supporting structure of the entire automatic weighing device, provides a stable framework to carry other components, and ensures the overall structural strength and stability of the device. A driving shaft is rotatably connected to a position between the front and rear sides of the inner wall of the U-shaped frame and close to the left side. The outer wall of the driving shaft is provided with four first connecting wheels arranged equidistantly front to back. A driven shaft is rotatably connected to a position between the front and rear sides of the inner wall of the U-shaped frame and close to the right side. The outer wall of the driven shaft is provided with four second connecting wheels arranged equidistantly front to back. The first and second connecting wheels, which are arranged opposite to each other on the left and right, are commonly connected to a conveyor belt, and the materials to be weighed are driven from left to right by the four conveyor belts.

[0008] An avoidance hole a is provided in the middle of the bottom of the U-shaped frame, and an electric telescopic rod is provided at the bottom of the U-shaped frame and at the position of the avoidance hole a. The electric telescopic rod is connected to an external power supply for operation, and the end of the movable rod of the electric telescopic rod passes through the avoidance hole a and is fixedly connected to a circular solid block. The circular solid block is connected to a weighing assembly, and the weighing assembly includes an electronic scale, and a rectangular plate is provided on the top of the electronic scale. Three strip-shaped load-bearing blocks are arranged equidistantly front and back on the top of the rectangular plate. The strip-shaped load-bearing blocks are located between two adjacent conveyor belts in the front and rear. The weighing assembly is driven up and down by the electric telescopic rod. When the object When the material moves to the top of the weighing assembly, the conveyor belt stops working, and the electric telescopic rod drives the weighing assembly to move upward. The top of the three bar-shaped load-bearing blocks is against the bottom of the material to support the material, so that the material is separated from the conveyor belt, so that the electronic scale weighs the material. When the weighing is completed, the electric telescopic rod drives the weighing assembly to reset downward, so that the three bar-shaped load-bearing blocks move to below the upper surface of the conveyor belt, so that the material is placed on the conveyor belt, and then the conveyor belt drives the material to continue to move to the right, thereby realizing automatic weighing and feeding, improving weighing efficiency, and will not cause damage to the material.

[0009] Preferably, a motor is provided on the front side of the U-shaped frame and near the left side. The motor works with an external power supply. The output shaft of the motor is coaxially connected to the front end of the driving shaft. The motor is responsible for driving the conveyor belt to realize the transportation of materials.

[0010] Preferably, the bottom of the U-shaped frame and positions near the four corners are provided with supporting feet to support the U-shaped frame.

[0011] Preferably, four first thread grooves arranged in a matrix are provided at the bottom and near the middle of the U-shaped frame, and the four first thread grooves are all threadedly connected with third bolts.

[0012] Preferably, a U-shaped support plate is provided at the bottom of the U-shaped frame and at a position outside the electric telescopic rod. The U-shaped support plate is detachably connected to the bottom of the U-shaped frame by a third bolt, which facilitates the disassembly and assembly of the U-shaped support plate. The U-shaped support plate supports and fixes the electric telescopic rod.

[0013] Preferably, a circular sleeve is provided in the middle of the bottom of the electronic scale, and a second thread groove is provided on the outer wall of the circular solid block. The second thread groove is threadedly connected to a second bolt, and the circular solid block is detachably connected to the circular sleeve by the second bolt, which facilitates the disassembly and assembly of the electronic scale and the circular solid block, thereby facilitating the disassembly and assembly of the weighing assembly and the electric telescopic rod.

[0014] Preferably, the weighing assembly also includes four positioning rods, and the bottom of the U-shaped frame is provided with an avoidance hole b for the positioning rod to pass through, so as to improve the stability of the electronic scale when it moves up and down. The top of the positioning rod is provided with a threaded column, and the bottom of the electronic scale and near the four corners are provided with a fourth thread groove for threaded connection of the threaded column, which facilitates the disassembly and assembly of the positioning rod.

[0015] Preferably, a third thread groove is provided at the top of the electronic scale and near the four corners, and the four third thread grooves are all threadedly connected to the first bolt. The rectangular plate is detachably connected to the top of the electronic scale by the first bolt, which facilitates the disassembly and assembly of the rectangular plate and the electronic scale, and is conducive to the installation and disassembly of the weighing assembly.

[0016] Preferably, a photoelectric switch is provided on the U-shaped frame, and the weighing assembly is located between the transmitter and receiver of the photoelectric switch, and the transmitter and receiver are respectively installed on the front and rear sides of the U-shaped frame, and the photoelectric switch is located above the conveyor belt. The photoelectric switch is used to detect the position of the material during the weighing process to ensure that the weighing assembly performs the correct weighing operation when the material arrives. The photoelectric switch, electronic scale, motor and electric telescopic rod are controlled by the controller. Specifically, when the photoelectric switch detects the material, the material moves to the top of the weighing assembly, the controller controls the motor to stop working, and controls the movable rod of the electric telescopic rod to move upward, thereby performing the weighing operation, and the electronic scale weighs the material and outputs the data. When the weighing operation is completed, the movable rod of the electric telescopic rod is controlled to move downward until the material is placed on the conveyor belt, and then the controller controls the motor to start working so that the conveyor belt continues to transport the material.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This automatic weighing device can automatically realize material transportation, weighing and feeding operations without manual intervention, greatly improving work efficiency. It is particularly suitable for scenarios such as large-scale production, logistics sorting and automated retail, avoiding the bottleneck problem of manual weighing.

[0019] 2. The automatic weighing device, through the design of electronic scale and bar-shaped load-bearing block, can weigh the material when it is separated from the conveyor belt, avoiding the interference of the conveyor belt on the weighing results and improving the weighing accuracy and data reliability.

[0020] 3. During the weighing and unloading process, the electric telescopic rod drives the weighing assembly to move up and down, so that the material is placed stably on the conveyor belt. The material will not be damaged by gravity or drop. It is particularly suitable for weighing fragile items and reduces the material breakage rate.

[0021] 4. The components of the automatic weighing device are connected by bolts and threaded grooves, making the installation and disassembly of key components of the weighing assembly more convenient and facilitating the maintenance and overhaul of the equipment.

[0022] 5. The automatic weighing device, through the cooperation of photoelectric switches and controllers, can automatically detect the position of materials, accurately control the working status of the motor, electric telescopic rod and electronic scale, realize intelligent operation, and improve the automation level and operating efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the assembly structure of the U-shaped frame, the electric telescopic rod and the U-shaped support plate in the utility model;

[0025] Figure 3 This is a schematic diagram of the assembly structure of the driving shaft, driven shaft and conveyor belt in the utility model;

[0026] Figure 4 This is a schematic diagram of the assembly structure of the electric telescopic rod and the weighing component in the utility model;

[0027] Figure 5 This is a schematic diagram of the assembly structure of the electronic scale, rectangular plate and strip-shaped load-bearing block in the utility model;

[0028] In the figure: 1. U-shaped frame; 10. Avoidance hole a; 11. Avoidance hole b; 12. First thread groove; 2. Driving shaft; 20. First connecting wheel; 3. Driven shaft; 30. Second connecting wheel; 4. Conveyor belt; 5. Motor; 6. Electric telescopic rod; 60. Round solid block; 600. Second thread groove; 7. Weighing assembly; 70. Electronic scale; 700. Third thread groove; 701. Fourth thread groove; 71. Rectangular plate; 72. Bar-shaped load-bearing block; 73. Round sleeve block; 74. Positioning rod; 740. Threaded column; 75. First bolt; 76. Second bolt; 8. U-shaped support plate; 9. Photoelectric switch; 13. Support leg; 14. Third bolt. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0032] An automatic weighing device includes a U-shaped frame 1, which serves as the main supporting structure of the entire automatic weighing device, provides a stable framework to carry other components, and ensures the overall structural strength and stability of the device. A driving shaft 2 is rotatably connected to a position between the front and rear sides of the inner wall of the U-shaped frame 1 and near the left side. The outer wall of the driving shaft 2 is provided with four first connecting wheels 20 arranged equidistantly from front to back. A driven shaft 3 is rotatably connected to a position between the front and rear sides of the inner wall of the U-shaped frame 1 and near the right side. The outer wall of the driven shaft 3 is provided with four second connecting wheels 30 arranged equidistantly from front to back. The first connecting wheels 20 and the second connecting wheels 30, which are arranged opposite to each other on the left and right, are jointly connected to a conveyor belt 4, which drives the material to be weighed from left to right via the four conveyor belts 4.

[0033] An avoidance hole a10 is provided in the middle of the bottom of the U-shaped frame 1. An electric telescopic rod 6 is provided at the bottom of the U-shaped frame 1 and at the position of the avoidance hole a10. The electric telescopic rod 6 is connected to an external power supply. The end of the movable rod of the electric telescopic rod 6 passes through the avoidance hole a10 and is fixedly connected to a circular solid block 60. The circular solid block 60 is connected to a weighing assembly 7. The weighing assembly 7 includes an electronic scale 70. A rectangular plate 71 is provided on the top of the electronic scale 70. Three strip-shaped load-bearing blocks 72 are arranged equidistantly front and back on the top of the rectangular plate 71. The strip-shaped load-bearing blocks 72 are located between the two adjacent conveyor belts 4 in the front and rear. The weighing assembly 7 is driven up and down by the electric telescopic rod 6. When the object When the material moves to the top of the weighing assembly 7, the conveyor belt 4 stops working, and the electric telescopic rod 6 drives the weighing assembly 7 to move upward. The top of the three bar-shaped load-bearing blocks 72 is against the bottom of the material to support the material, so that the material is separated from the conveyor belt 4, so that the electronic scale 70 weighs the material. When the weighing is completed, the electric telescopic rod 6 drives the weighing assembly 7 to reset downward, so that the three bar-shaped load-bearing blocks 72 move to below the upper surface of the conveyor belt 4, so that the material is placed on the conveyor belt 4, and then the conveyor belt 4 drives the material to continue to move to the right, thereby realizing automatic weighing and feeding, improving weighing efficiency, and not causing damage to the material.

[0034] In this embodiment, a motor 5 is provided on the front side of the U-shaped frame 1 and near the left side. The motor 5 works with an external power supply. The output shaft of the motor 5 is coaxially connected to the front end of the driving shaft 2. The motor 5 is responsible for driving the conveyor belt 4 to operate and realize the transportation of materials.

[0035] Specifically, support legs 13 are provided at the bottom of the U-shaped frame 1 and near the four corners to support the U-shaped frame 1 .

[0036] Furthermore, four first thread grooves 12 arranged in a matrix are provided at the bottom and near the middle of the U-shaped frame 1 , and the four first thread grooves 12 are all threadedly connected with third bolts 14 .

[0037] Furthermore, a U-shaped support plate 8 is provided at the bottom of the U-shaped frame 1 and outside the electric telescopic rod 6. The U-shaped support plate 8 is detachably connected to the bottom of the U-shaped frame 1 by a third bolt 14, which facilitates the disassembly and assembly of the U-shaped support plate 8. The U-shaped support plate 8 supports and fixes the electric telescopic rod 6.

[0038] Furthermore, a circular sleeve 73 is provided in the middle of the bottom of the electronic scale 70, and a second threaded groove 600 is provided on the outer wall of the circular solid block 60. The second threaded groove 600 is threadedly connected to a second bolt 76. The circular solid block 60 is detachably connected to the circular sleeve 73 through the second bolt 76, which facilitates the disassembly and assembly of the electronic scale 70 and the circular solid block 60, thereby facilitating the disassembly and assembly of the weighing assembly 7 and the electric telescopic rod 6.

[0039] Furthermore, the weighing assembly 7 also includes four positioning rods 74. The bottom of the U-shaped frame 1 is provided with an avoidance hole b11 for the positioning rod 74 to pass through, thereby improving the stability of the electronic scale 70 when moving up and down. The top of the positioning rod 74 is provided with a threaded column 740. The bottom of the electronic scale 70 and near the four corners are provided with a fourth threaded groove 701 for the threaded connection of the threaded column 740, which facilitates the disassembly and assembly of the positioning rod 74.

[0040] Furthermore, a third thread groove 700 is provided at the top of the electronic scale 70 and near the four corners. The four third thread grooves 700 are all threadedly connected to the first bolts 75. The rectangular plate 71 is detachably connected to the top of the electronic scale 70 through the first bolts 75, which facilitates the disassembly and assembly of the rectangular plate 71 and the electronic scale 70 and is beneficial to the installation and disassembly of the weighing assembly 7.

[0041] Furthermore, a photoelectric switch 9 is provided on the U-shaped frame 1, and the weighing assembly 7 is located between the transmitter and receiver of the photoelectric switch 9. The transmitter and receiver are respectively installed on the front and rear sides of the U-shaped frame 1. The photoelectric switch 9 is located above the conveyor belt 4. The photoelectric switch 9 is used to detect the position of the material during the weighing process to ensure that the weighing assembly 7 performs the correct weighing operation when the material arrives. The photoelectric switch 9, the electronic scale 70, the motor 5 and the electric telescopic rod 6 are controlled by the controller. Specifically, when the photoelectric switch 9 detects the material, the material moves to the top of the weighing assembly 7, the controller controls the motor 5 to stop working, and controls the movable rod of the electric telescopic rod 6 to move upward, thereby performing the weighing operation. The electronic scale 70 weighs the material and outputs the data. When the weighing operation is completed, the movable rod of the electric telescopic rod 6 is controlled to move downward until the material is placed on the conveyor belt 4, and then the controller controls the motor 5 to start working, so that the conveyor belt 4 continues to transport the material.

[0042] When the automatic weighing device of this embodiment is in use, the motor 5 starts to drive the conveyor belt 4 to run, and the material is placed on the left end of the conveyor belt 4, moves to the right through the conveyor belt 4, and enters the weighing area. When the material enters the weighing area, the photoelectric switch 9 detects the position of the material and transmits the signal to the controller. The controller instructs the motor 5 to stop the conveyor belt 4 so that the material stays just above the weighing component 7. After receiving the signal from the controller, the electric telescopic rod 6 drives the weighing component 7 to move upward, and the bar-shaped load-bearing block 72 lifts the material to separate it from the conveyor belt 4. When the material is suspended in the air, the electronic scale 70 starts to weigh the material, obtains weight data and controls it. The system outputs to the display or recording device. After weighing is completed, the electric telescopic rod 6 drives the weighing component 7 to move downward, so that the material falls back onto the conveyor belt 4. The controller instructs the motor 5 to restart, and the conveyor belt 4 continues to drive the material to move to the right and enter the next processing link. The device supports continuous operation and is suitable for large-scale material weighing operations. Each time the material passes through the weighing area, the weighing and data recording will be automatically completed without manual intervention. The device has a high degree of automation and is simple to operate. It is especially suitable for continuous material weighing and transportation in large-scale production environments, greatly improving the efficiency of the production line and reducing the errors caused by manual operation and the risk of material damage.

[0043] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic weighing device, comprising a U-shaped frame (1), characterized in that: A driving shaft (2) is rotatably connected to a position between the front and rear sides of the inner wall of the U-shaped frame (1) and close to the left side. The outer wall of the driving shaft (2) is provided with four first connecting wheels (20) arranged equidistantly from front to back. A driven shaft (3) is rotatably connected to a position between the front and rear sides of the inner wall of the U-shaped frame (1) and close to the right side. The outer wall of the driven shaft (3) is provided with four second connecting wheels (30) arranged equidistantly from front to back. The first connecting wheels (20) and the second connecting wheels (30) arranged opposite to each other on the left and right are commonly connected to a conveyor belt (4). A avoidance hole a (10) is provided in the middle of the bottom of the U-shaped frame (1). ), an electric telescopic rod (6) is provided at the bottom of the U-shaped frame (1) and at the position of the avoidance hole a (10), the end of the movable rod of the electric telescopic rod (6) passes through the avoidance hole a (10) and is fixedly connected to a circular solid block (60), the circular solid block (60) is connected to a weighing assembly (7), the weighing assembly (7) includes an electronic scale (70), a rectangular plate (71) is provided on the top of the electronic scale (70), three strip-shaped load-bearing blocks (72) arranged at equal distances from each other are provided on the top of the rectangular plate (71), and the strip-shaped load-bearing blocks (72) are located between two adjacent conveyor belts (4) at the front and rear.

2. The automatic weighing device according to claim 1, characterized in that: A motor (5) is provided on the front side of the U-shaped frame (1) and close to the left side, and the output shaft of the motor (5) is coaxially connected to the front end of the driving shaft (2).

3. The automatic weighing device according to claim 1, characterized in that: Support legs (13) are provided at the bottom of the U-shaped frame (1) and near the four corners.

4. The automatic weighing device according to claim 1, characterized in that: Four first thread grooves (12) arranged in a matrix are provided at the bottom and near the middle of the U-shaped frame (1), and the four first thread grooves (12) are all threadedly connected with third bolts (14).

5. The automatic weighing device according to claim 4, characterized in that: A U-shaped support plate (8) is provided at the bottom of the U-shaped frame (1) and located outside the electric telescopic rod (6). The U-shaped support plate (8) is detachably connected to the bottom of the U-shaped frame (1) via a third bolt (14).

6. The automatic weighing device according to claim 1, characterized in that: A circular sleeve (73) is provided in the middle of the bottom of the electronic scale (70), a second thread groove (600) is provided on the outer wall of the circular solid block (60), a second bolt (76) is threadedly connected to the second thread groove (600), and the circular solid block (60) is detachably connected to the circular sleeve (73) via the second bolt (76).

7. The automatic weighing device according to claim 1, characterized in that: The weighing assembly (7) further comprises four positioning rods (74); a relief hole b (11) for the positioning rods (74) to pass through is provided at the bottom of the U-shaped frame (1); a threaded column (740) is provided at the top of the positioning rod (74); and fourth threaded grooves (701) for the threaded column (740) to be threadedly connected are provided at the bottom of the electronic scale (70) and near the four corners.

8. The automatic weighing device according to claim 1, characterized in that: A third thread groove (700) is provided at the top of the electronic scale (70) and near the four corners. The four third thread grooves (700) are all threadedly connected to a first bolt (75). The rectangular plate (71) is detachably connected to the top of the electronic scale (70) via the first bolt (75).

9. The automatic weighing device according to claim 1, characterized in that: A photoelectric switch (9) is provided on the U-shaped frame (1), the weighing assembly (7) is located between a transmitter and a receiver of the photoelectric switch (9), and the photoelectric switch (9) is located above the conveyor belt (4).

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