Calibration device of electronic scale
By setting a pressing plate with equal angle circumference distribution on the lower plate of the electronic scale calibration device, and using cylinder driving and pressure sensor detection methods, the problem of curling caused by lack of fixation of the edge of the electronic scale is solved, achieving a more stable and accurate calibration effect.
Patent Information
- Application Number
- CN202411788606.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-03-25
AI Technical Summary
When the existing electronic scale calibration device uses a force source to pressurize the surface of the electronic scale, the force source is applied to the center of the top of the electronic scale, but the edge of the electronic scale is not fixed and is prone to be raised, resulting in uneven and unstable force under the electronic scale, affecting the calibration accuracy.
An electronic scale calibration device is designed. By setting a pressing plate with equal angle circumference distribution on the lower pressure plate, the cylinder is used to drive the upper pressure plate and the lower pressure plate to move downward, driving the hollow compression rod to slide and the outer peripheral sliding of the connecting rod. The pressure sensor detects the force of the hollow compression rod, calculates the squeezing pressure of the lower pressure plate to the electronic scale, and limits the edges and corners of the electronic scale through the expansion of the press plate to prevent lifting.
Through this device, the stability of the down pressure plate applying force to the electronic scale is increased, and the edge of the electronic scale is prevented from rising, which improves the accuracy and stability of the electronic scale calibration.
Smart Images
Figure CN119688047A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of electronic scale calibration devices, in particular to an electronic scale calibration device. Background Art
[0002] The current calibration method for electronic scales is to use the "direct weight addition method". This calibration method requires placing the weights on the electronic scale one by one, and requires a large amount of manpower and loading and unloading transportation machinery to load and unload and carry the weights, which is time-consuming and labor-intensive.
[0003] Patent CN1174324A provides an electronic scale calibration method and device, which can not only calibrate electronic scales used under general conditions, but also can conveniently and quickly calibrate electronic scales used under special conditions. The power source device is composed of a spring group, an upper bracket, a lower bracket and a spiral force transmission mechanism, and the detection system is composed of a high-precision sensor and a secondary instrument connected to form a detection system. The detection system is calibrated by a standard force measuring machine as a working standard. The force source device is connected to the electronic scale force beam by a pull rod, and the high-precision sensor is connected to the force source device. The position of the push rod of the spiral force transmission mechanism is adjusted, and the high-precision sensor is pressed against the gantry connected to the foundation and supporting the electronic scale force beam. The spring group is compressed, and the force source device generates elastic force. When the calibration device and the electronic scale are in balance, the force on the electronic scale is equal to the elastic force. This elastic force is detected by the working standard as a standard value to calibrate the electronic scale.
[0004] When the existing electronic scale calibration device uses a force source to pressurize the surface of the electronic scale, the force source is applied to the center of the top of the electronic scale, but the edge of the electronic scale is not fixed and is easy to warp, resulting in uneven force and instability on the electronic scale, which will affect the calibration of the electronic scale. To this end, we propose a calibration device for an electronic scale to solve the above problem. Summary of the invention
[0005] The object of the present invention is to provide a calibration device for an electronic scale to solve the problem that when the existing calibration device for an electronic scale proposed in the above background technology uses a force source to pressurize the surface of the electronic scale, the force source is applied to the center of the top of the electronic scale, but the edge of the electronic scale is not fixed and is easy to warp up, resulting in uneven force on the electronic scale and instability, which will affect the calibration of the electronic scale.
[0006] To achieve the above object, the present invention provides the following technical solutions: A calibration device for an electronic scale, comprising a frame, a cylinder is fixed on the frame, a fixed sleeve is fixed on the output piston rod of the cylinder, an upper pressure plate is fixed on the fixed sleeve, a lower pressure plate is arranged at the bottom of the upper pressure plate, a plurality of springs are fixed between the upper pressure plate and the lower pressure plate, a plurality of pressing sheets are arranged on the lower pressure plate, a hollow pressure rod is movably clamped inside the fixed sleeve, a connecting rod is fixed on the inner top wall of the fixed sleeve, the hollow pressure rod is movably sleeved on the connecting rod, and a pressure sensor sleeved on the connecting rod is arranged between the connecting rod and the hollow pressure rod; The hollow pressure rod, the lower pressure plate and the pressure sheet are connected by a linkage structure, and the lower pressure plate will drive the pressure sheet to expand toward the outer peripheral side of the lower pressure plate when it moves upward.
[0007] In the calibration device for an electronic scale as described above, a plurality of springs are circumferentially distributed at equal angles between the upper pressing plate and the lower pressing plate.
[0008] A calibration device for an electronic scale as described above: a plurality of pressing plates are distributed at equal angles on the outer periphery of a lower pressing plate, a slot with inner dimensions matching the outer dimensions of the pressing plates is provided on the lower pressing plate, and the pressing plates are movably connected in the slot.
[0009] A calibration device for an electronic scale as described above: the linkage structure includes a fixing ring fixed on the hollow pressure rod and a limit slot fixed on the lower pressure plate, a limit block is movably connected in the limit slot, the limit block is fixed to the pressure plate, a hinged rod is arranged between the limit slot and the fixing ring, and both ends of the hinged rod are respectively hinged to the fixing ring and the limit slot.
[0010] The calibration device for an electronic scale as described above: an inner telescopic rod is fixed to the bottom end of the hollow pressure rod, an outer cylinder is fixed to the lower pressure plate, and the inner telescopic rod is movably inserted into the outer cylinder.
[0011] A calibration device for an electronic scale as described above: a stopper is fixed on the hollow pressure rod, the stopper is movably clamped in the interior of the fixed sleeve, and the stopper is used to prevent the hollow pressure rod from falling out of the fixed sleeve after being inserted into the fixed sleeve.
[0012] In the above-mentioned electronic scale calibration device, a display is fixed on the frame, and the signal output end of the pressure sensor is connected to the signal input end of the display.
[0013] In the calibration device for an electronic scale as described above, a soft adhesive layer is fixedly adhered to the bottom surface of the pressing sheet.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: when calibrating the electronic scale, the electronic scale is placed under the lower pressure plate, the cylinder is started, and the upper and lower pressure plates are driven to move downward, which will drive the hollow pressure rod to slide in the fixed sleeve and the outer periphery of the connecting rod to slide, thereby squeezing the pressure sensor to the top wall inside the fixed sleeve. The pressure sensor can detect the force applied to the hollow pressure rod, thereby calculating the squeezing force of the lower pressure plate on the electronic scale, and then comparing it with the electronic scale reading to calibrate the electronic scale. The present invention provides the lower pressure plate with the same pressure sensor. The pressure pieces are distributed in a circular angle. When the upper pressure plate moves downward, the spring is squeezed, and the inner telescopic rod moves in the outer cylinder, driving the hinged rod to rotate at the same time. The limit card block is slidably engaged in the limit card slot to drive the limit card block to move, thereby driving multiple pressure pieces to extend toward the outer periphery of the lower pressure plate. When the lower pressure plate applies force to the upper surface of the electronic scale, the multiple pressure pieces are expanded outward to limit the corners of the electronic scale to prevent it from tilting, thereby increasing the stability of the force applied by the lower pressure plate to the electronic scale and improving the calibration accuracy of the electronic scale. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 The present invention is a schematic diagram of the structure of a calibration device for an electronic scale from a first perspective.
[0016] Figure 2 The present invention is a schematic diagram of the structure of a calibration device for an electronic scale from a second viewing angle.
[0017] Figure 3 The present invention is a schematic diagram of the structure of a calibration device for an electronic scale without a frame and a display.
[0018] Figure 4 A calibration device for an electronic scale Figure 3 Schematic diagram of the local explosion structure.
[0019] Figure 5 A calibration device for an electronic scale Figure 4 Schematic diagram of the local enlarged structure.
[0020] Figure 6 A calibration device for an electronic scale Figure 3 Schematic diagram of the local structure.
[0021] In the figure: 1. frame; 2. cylinder; 3. fixed sleeve; 4. upper pressure plate; 5. spring; 6. lower pressure plate; 7. pressure sheet; 8. fixing ring; 9. slot; 10. limit slot; 11. limit block; 12. hinged rod; 13. hollow pressure rod; 14. inner telescopic rod; 15. outer cylinder; 16. block; 17. connecting rod; 18. pressure sensor; 19. display. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0023] See also Figure 1 to Figure 6 As an embodiment of the present invention, a calibration device for an electronic scale includes a frame 1, a cylinder 2 is fixed on the frame 1, a fixed sleeve 3 is fixed on the output piston rod of the cylinder 2, an upper pressing plate 4 is fixed on the fixed sleeve 3, a lower pressing plate 6 is arranged at the bottom of the upper pressing plate 4, a plurality of springs 5 are fixed between the upper pressing plate 4 and the lower pressing plate 6, a plurality of pressing sheets 7 are arranged on the lower pressing plate 6, a hollow pressing rod 13 is movably connected inside the fixed sleeve 3, a connecting rod 17 is fixed on the inner top wall of the fixed sleeve 3, the hollow pressing rod 13 is movably sleeved on the connecting rod 17, and a pressure sensor 18 sleeved on the connecting rod 17 is arranged between the connecting rod 17 and the hollow pressing rod 13; The hollow pressure rod 13 , the lower pressure plate 6 , and the pressing sheet 7 are connected by a linkage structure. When the lower pressure plate 6 moves upward, it drives the pressing sheet 7 to expand toward the outer peripheral side of the lower pressure plate 6 .
[0024] The pressure sensor 18 is pressed against the inner wall of the fixed sleeve 3, and the force applied to the hollow pressure rod 13 is detected by the pressure sensor 18, so as to infer the pressure of the lower pressure plate 6 on the electronic scale, and then the pressure is compared with the reading of the electronic scale to calibrate the electronic scale. The present invention provides the lower pressure plate 6 with connecting rods 17 with equal angles and circumferential distribution. When the upper pressure plate 4 moves downward, the spring 5 is squeezed. At the same time, when the lower pressure plate 6 moves upward, the pressing sheet 7 is driven to expand toward the outer peripheral side of the lower pressure plate 6. When the lower pressure plate 6 applies force to the upper surface of the electronic scale, the pressing sheet 7 is expanded outward through multiple pressing sheets 7, so as to limit the corners of the electronic scale and prevent it from tilting.
[0025] As a further solution of the present invention, a plurality of springs 5 are equiangularly distributed circumferentially between the upper pressing plate 4 and the lower pressing plate 6 .
[0026] In this embodiment, the upper pressing plate 4 and the lower pressing plate 6 are connected by the spring 5, and at the same time, the distance between the upper pressing plate 4 and the lower pressing plate 6 can be changed by the elastic expansion and contraction of the spring 5 when the upper pressing plate 4 moves downward.
[0027] As a further solution of the present invention, a plurality of pressing plates 7 are equiangularly distributed on the outer periphery of the lower pressing plate 6 , and a slot 9 having inner dimensions matching the outer dimensions of the pressing plates 7 is provided on the lower pressing plate 6 , and the pressing plates 7 are movably connected in the slot 9 .
[0028] In this embodiment, a plurality of pressing sheets 7 are expanded outward when the lower pressing plate 6 applies pressure, so as to limit the corners of the electronic scale and prevent the electronic scale pan from tilting, thereby facilitating stable application of pressure.
[0029] As a further solution of the present invention, the linkage structure includes a fixing ring 8 fixed on the hollow pressure rod 13 and a limiting slot 10 fixed on the lower pressure plate 6, a limiting block 11 is movably connected in the limiting slot 10, the limiting block 11 is fixed to the pressure plate 7, a hinged rod 12 is arranged between the limiting slot 10 and the fixing ring 8, and both ends of the hinged rod 12 are respectively hinged to the fixing ring 8 and the limiting slot 10.
[0030] In this embodiment, when the upper pressure plate 4 is pressed downward, the fixing ring 8 is driven downward, thereby driving the hinge rod 12 to rotate, and the limit block 11 is slidably engaged in the limit slot 10 to drive the limit block 11 to move, thereby driving the multiple pressing plates 7 to extend toward the periphery of the lower pressure plate 6.
[0031] As a further solution of the present invention, an inner telescopic rod 14 is fixed to the bottom end of the hollow pressure rod 13 , an outer cylinder 15 is fixed to the lower pressure plate 6 , and the inner telescopic rod 14 is movably inserted into the outer cylinder 15 .
[0032] In this embodiment, the inner telescopic rod 14 and the outer cylinder 15 are engaged and clamped together to limit the position of the hollow pressure rod 13 when it moves up and down, and to ensure that the upper pressure plate 4 can be pressed tightly against the lower pressure plate 6 after the upper pressure plate 4 moves down to a certain distance.
[0033] As a further solution of the present invention, a stopper 16 is fixed on the hollow pressure rod 13 , and the stopper 16 is movably clamped in the interior of the fixed sleeve 3 . The stopper 16 is used to prevent the hollow pressure rod 13 from falling out of the fixed sleeve 3 after being inserted into the fixed sleeve 3 .
[0034] In this embodiment, the hollow pressure rod 13 can slide up and down in the fixed sleeve 3 , and at the same time, the stopper 16 can be provided to ensure that the hollow pressure rod 13 will not fall off from the inside of the fixed sleeve 3 .
[0035] As a further solution of the present invention, a display 19 is fixed on the frame 1 , and a signal output end of the pressure sensor 18 is connected to a signal input end of the display 19 .
[0036] In this embodiment, the upper pressure plate 4 and the lower pressure plate 6 move downward, which will drive the hollow pressure rod 13 to slide in the fixed sleeve 3 and the outer periphery of the connecting rod 17 to slide, thereby squeezing the pressure sensor 18 to the top wall inside the fixed sleeve 3. The pressure sensor 18 can detect the force on the hollow pressure rod 13, thereby calculating the squeezing force of the lower pressure plate 6 on the electronic scale. The value detected by the pressure sensor 18 is displayed by the display 19 and then compared with the reading of the electronic scale.
[0037] As a further solution of the present invention, a soft adhesive layer is fixedly adhered to the bottom surface of the pressing sheet 7 .
[0038] In this embodiment, the soft rubber layer is soft, which can prevent the pressing sheet 7 from scratching the surface of the electronic scale when it moves on the surface of the electronic scale pan.
[0039] The working principle of the invention is: when calibrating the electronic scale, place the electronic scale under the lower pressure plate 6, start the cylinder 2, drive the upper pressure plate 4 and the lower pressure plate 6 to move downward, and the lower pressure plate 6 is pressed tightly on the electronic scale plate. During the downward movement of the upper pressure plate 4 and the lower pressure plate 6, the hollow pressure rod 13 will be driven to slide in the fixed sleeve 3 and the outer periphery of the connecting rod 17 will slide, thereby squeezing the pressure sensor 18 to the top wall inside the fixed sleeve 3. The pressure sensor 18 can detect the force applied to the hollow pressure rod 13, thereby calculating the squeezing force of the lower pressure plate 6 on the electronic scale. The value detected by the pressure sensor 18 is displayed on the display 19, and then compared with the electronic scale reading, and the electronic scale is calibrated. The sub-scale is calibrated. The present invention provides pressure pieces 7 with equal-angle circumferential distribution on the lower pressure plate 6. When the upper pressure plate 4 moves downward, the spring 5 is squeezed, and the inner telescopic rod 14 moves in the outer cylinder 15, and at the same time, the hinge rod 12 is driven to rotate. The limit block 11 is slidably engaged in the limit slot 10 to drive the limit block 11 to move, thereby driving multiple pressure pieces 7 to extend toward the outer periphery of the lower pressure plate 6. When the lower pressure plate 6 applies force to the upper surface of the electronic scale, the multiple pressure pieces 7 are expanded outward to limit the corners of the electronic scale to prevent it from tilting, thereby increasing the stability of the force applied by the lower pressure plate 6 to the electronic scale and improving the calibration accuracy of the electronic scale.
[0040] The above embodiments are exemplary rather than restrictive, so the technical solutions of the present invention that can be implemented in other specific forms without departing from the spirit or basic features of the present invention are all included in the present invention.
Claims
1. A calibration device for an electronic scale, comprising a frame (1), characterized in that: A cylinder (2) is fixed on the frame (1), a fixed sleeve (3) is fixed on the output piston rod of the cylinder (2), an upper pressure plate (4) is fixed on the fixed sleeve (3), a lower pressure plate (6) is arranged at the bottom of the upper pressure plate (4), a plurality of springs (5) are fixed between the upper pressure plate (4) and the lower pressure plate (6), a plurality of pressing sheets (7) are arranged on the lower pressure plate (6), a hollow pressure rod (13) is movably clamped inside the fixed sleeve (3), a connecting rod (17) is fixed on the inner top wall of the fixed sleeve (3), the hollow pressure rod (13) is movably sleeved on the connecting rod (17), and a pressure sensor (18) sleeved on the connecting rod (17) is arranged between the connecting rod (17) and the hollow pressure rod (13); The hollow pressure rod (13), the lower pressure plate (6) and the pressure sheet (7) are connected by a linkage structure, and when the lower pressure plate (6) moves upward, it drives the pressure sheet (7) to expand toward the outer peripheral side of the lower pressure plate (6).
2. The electronic scale calibration device according to claim 1, characterized in that: The plurality of springs (5) are equiangularly distributed circumferentially between the upper pressing plate (4) and the lower pressing plate (6).
3. The electronic scale calibration device according to claim 1, characterized in that: A plurality of the pressing sheets (7) are distributed at equal angles on the outer circumference of the lower pressing plate (6); the lower pressing plate (6) is provided with a slot (9) whose inner dimensions match the outer dimensions of the pressing sheets (7); the pressing sheets (7) are movably snap-fitted into the slot (9).
4. The electronic scale calibration device according to claim 1, characterized in that: The linkage structure comprises a fixing ring (8) fixed on the hollow pressure rod (13) and a limiting card slot (10) fixed on the lower pressure plate (6); a limiting card block (11) is movably connected in the limiting card slot (10); the limiting card block (11) is fixed to the pressure plate (7); a hinged rod (12) is provided between the limiting card slot (10) and the fixing ring (8); and two ends of the hinged rod (12) are respectively hinged to the fixing ring (8) and the limiting card slot (10).
5. The electronic scale calibration device according to claim 1, characterized in that: An inner telescopic rod (14) is also fixed to the bottom end of the hollow pressure rod (13), an outer cylinder (15) is fixed to the lower pressure plate (6), and the inner telescopic rod (14) is movably inserted into the outer cylinder (15).
6. The electronic scale calibration device according to claim 1, characterized in that: A stopper (16) is fixed to the hollow pressure rod (13), and the stopper (16) is movably clamped in the interior of the fixed sleeve (3). The stopper (16) is used to prevent the hollow pressure rod (13) from falling out of the interior of the fixed sleeve (3) after the hollow pressure rod (13) is inserted into the interior of the fixed sleeve (3).
7. The electronic scale calibration device according to claim 1, characterized in that: A display (19) is fixed on the frame (1), and a signal output end of the pressure sensor (18) is connected to a signal input end of the display (19).
8. The electronic scale calibration device according to claim 1, characterized in that: A soft rubber layer is fixedly adhered to the bottom surface of the pressing sheet (7).