Self-resetting jacking hopper scale

Abstract

The invention relates to a self-resetting jacking hopper scale, which comprises a mounting bracket, a hopper arranged on the mounting bracket and a plurality of self-resetting jacking mechanisms, and is characterized in that each self-resetting jacking mechanism comprises a weighing sensor and a telescopic power cylinder, and the weighing sensor comprises a weighing sensor and a telescopic power cylinder which are fixed on the top surface of an annular supporting plate; the telescopic power cylinder comprises a piston rod which can stretch out and draw back up and down, when the piston rod stretches out upwards and pushes the annular top plate of the installation support, the weighing sensor is disengaged from the annular top plate, and when the piston rod retracts downwards and is disengaged from the surface of the annular top plate, the weighing sensor is attached to the annular top plate.

Description

Technical Field

[0001] This invention relates to the field of metering technology, and specifically to a self-resetting lifting hopper scale. Background Technology

[0002] A hopper scale is a weighing device for measuring bulk materials. It measures the weight of the material in the hopper using a load cell. It is widely used in industries such as food, chemicals, and building materials. Its measurement accuracy directly depends on the stability of its load cell.

[0003] In existing hopper scales, the hopper and weighing sensor are in a complex dynamic stress environment during the unloading process. Specifically, when the material flows from the hopper and out of the outlet, the material's own flow state generates irregular dynamic loads, and the material will rub and impact against the inner wall of the hopper. The various mechanisms will also generate continuous vibrations. Since the weighing sensor itself is extremely sensitive to non-axial forces, these dynamic interferences, additional forces, and continuous vibrations will directly affect the weighing sensor, seriously affecting its measurement accuracy and repeatability, and may even damage the load-bearing structure of the weighing sensor. Summary of the Invention

[0004] In view of the deficiencies of the prior art described above, the technical problem to be solved by the present invention is to provide a self-resetting lifting hopper scale that can effectively avoid interference from the weighing sensor during the unloading process.

[0005] To achieve the above objectives, the present invention provides a self-resetting lifting hopper scale, comprising:

[0006] The mounting bracket includes a base, an annular support plate, an annular top plate, a fixed support rod, and a telescopic support rod. The bottom end of the fixed support rod is fixed to the top of the base, and the top end is fixed to the bottom surface of the annular support plate. The bottom end of the telescopic support rod is also fixed to the top of the base, and the top end is fixed to the bottom surface of the annular top plate. The annular top plate is located above the annular support plate, and the annular support plate can drive the telescopic support rod to extend and retract up and down.

[0007] The hopper has an annular top plate fixed to its outer circumferential surface, the hopper is located in an annular support plate, and the bottom of the hopper is provided with a discharge door that can be opened and closed.

[0008] Multiple self-resetting lifting mechanisms are provided. Each self-resetting lifting mechanism includes a load cell and a telescopic power cylinder, all fixed to the top surface of an annular support plate. The telescopic power cylinder includes a piston rod that can extend and retract vertically. When the piston rod extends upward and pushes against the bottom surface of the annular top plate, the load cell disengages from the bottom surface of the annular top plate. When the piston rod retracts downward and disengages from the bottom surface of the annular top plate, the load cell contacts the bottom surface of the annular top plate.

[0009] Furthermore, the self-resetting lifting mechanism also includes a centering structure, which includes a centering top block, a fixed column, a sliding sleeve, and multiple ball screws. The top of the centering top block is fixed to the bottom surface of the annular top plate, and a circular groove is formed at the bottom. Multiple bolt holes are formed on the side of the centering top block, and the bolt holes are connected to the circular groove. The bottom of the fixed column is fixed to the top surface of the annular support plate, and the top of the fixed column is located in the circular groove. The sliding sleeve is fitted onto the fixed column and can slide up and down along the fixed column. When the sliding sleeve slides into the circular groove, the outer circumferential surface of the sliding sleeve is in contact with the inner wall surface of the circular groove. The multiple ball screws are respectively screwed into the multiple bolt holes and abut against the outer circumferential surface of the fixed column.

[0010] Furthermore, the self-resetting lifting mechanism also includes a limiting top block, the top of which is fixed to the bottom surface of the annular top plate, and a limiting conical hole is opened at the bottom. The top of the piston rod is provided with a limiting conical surface that cooperates with the limiting conical hole. When the piston rod extends upward, its limiting conical surface extends into the limiting conical hole, and when the piston rod retracts downward, its limiting conical surface extends out of the limiting conical hole.

[0011] Furthermore, the weighing sensor includes a sensor body (400), a control body, and a force transmission structure. The sensor body (400) is fixed on the top surface of the annular support plate and is used to measure the weight of the hopper and the material. The control body is electrically connected to the sensor body (400) and is used to zero the measurement data of the sensor body (400). The force transmission structure includes a force transmission base (403), a force transmission ball (402), and a force transmission top block (401). The bottom of the force transmission base (403) is connected to the sensor body (400), and a semi-circular groove is provided on the top. The force transmission ball (402) is set in the semi-circular groove. The top of the force transmission top block (401) is fixed on the bottom surface of the annular top plate, and a horizontal contact surface is provided at the bottom that can contact the force transmission ball (402).

[0012] Furthermore, the self-resetting lifting mechanism also includes a base plate, which is fixed to the top surface of the annular support plate. The weighing sensor, telescopic power cylinder, and fixing column are all fixed to the base plate.

[0013] Furthermore, the mounting bracket is also provided with a guide support rod, and a guide hole is provided on the annular top plate. The bottom end of the guide support rod is fixed to the top surface of the annular support plate, and the top end passes through the guide hole.

[0014] Furthermore, the base of the mounting bracket is provided with a discharge port, and the discharge gate of the hopper is located above the discharge port.

[0015] Furthermore, the telescopic power cylinder includes two adjacent piston rods, which are fixedly connected by a connecting block.

[0016] As described above, the self-resetting lifting hopper scale of the present invention has the following beneficial effects:

[0017] 1. In the embodiments of this application, during the weighing stage, the hopper scale of this application has high weighing accuracy and good stability. The weight of the hopper acts directly and stably on the weighing sensor through the annular top plate, which can reduce the influence of lateral force on the measurement to a certain extent and improve weighing accuracy and stability.

[0018] 2. In the embodiments of this application, during the unloading stage, the hopper scale of this application can effectively avoid interference with the weighing sensor during the unloading process. The telescopic power cylinder lifts the hopper as a whole, so that the weighing sensor is completely separated from the annular top plate. In this way, the shaking, impact and dynamic force generated by the material flow of the hopper during unloading will not act on the weighing sensor, thereby avoiding measurement errors, drift or even sensor damage.

[0019] 3. In the preferred embodiment of this application, during the reset phase, the hopper scale of this application resets accurately, and the weighing sensor can be zeroed every time. The centering structure enables the hopper to fall back to the initial position stably, ensuring that the starting state of each weighing is consistent. The force transmission structure can avoid nonlinear error in the output of the sensor body, thereby improving the repeatability and reliability of weighing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the hopper scale in this invention.

[0021] Figure 2 This is a top view of the hopper scale in this invention.

[0022] Figure 3 This is a schematic diagram of the mounting bracket in this invention.

[0023] Figure 4 This is a schematic diagram of the self-resetting lifting mechanism in this invention.

[0024] Figure 5 This is a cross-sectional view of the self-resetting lifting mechanism in this invention.

[0025] Figure 6 This is a schematic diagram of the structure of the centering block in this invention.

[0026] Figure 7 This is a schematic diagram of the limiting top block in this invention.

[0027] Figure 8 This is a schematic diagram of the piston rod in this invention.

[0028] Explanation of icon numbers

[0029] 1. Mounting bracket; 100. Base; 101. Annular support plate; 102. Annular top plate; 103. Fixed support rod; 104. Telescopic support rod; 105. Guide support rod; 2. Hopper; 200. Discharge gate; 3. Self-resetting lifting mechanism; 400. Sensor body; 401. Force transmission top block; 402. Force transmission ball; 403. Force transmission base; 5. Telescopic power cylinder; 500. Piston rod; 501. Limiting top block; 502. Limiting conical hole; 503. Limiting conical surface; 504. Connecting block; 600. Centering top block; 601. Fixed column; 602. Sliding sleeve; 603. Circular groove; 604. Bolt hole; 7. Base plate. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0031] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0034] See Figures 1 to 8 The present invention provides a self-resetting lifting hopper scale, comprising:

[0035] Mounting bracket 1 (see) Figure 3The device includes a base 100, an annular support plate 101, an annular top plate 102, a fixed support rod 103, and a telescopic support rod 104. The bottom end of the fixed support rod 103 is fixed to the top of the base 100, and the top end is fixed to the bottom surface of the annular support plate 101. The bottom end of the telescopic support rod 104 is also fixed to the top of the base 100, and the top end is fixed to the bottom surface of the annular top plate 102. The annular top plate 102 is located above the annular support plate 101, and the annular support plate 101 can drive the telescopic support rod 104 to extend and retract vertically. Preferably, the telescopic support rod 104 is set as a spring rod. During the weighing stage, the hopper 2 and the material can drive the annular top plate 102 to move downward, thereby pushing the spring rod downward to retract. At this time, the spring rod is in an elastic energy storage state. During the unloading stage, the telescopic power cylinder 5 is activated to lift the annular top plate 102 upward, thereby lifting the hopper 2. The spring rod releases its elasticity, assisting the telescopic power cylinder 5. The hopper 2 is lifted upwards. When the weighing sensor disengages from the bottom surface of the annular top plate 102, the spring rod is stretched and in an elastic energy storage state. During the reset phase, the telescopic power cylinder 5 is activated to retract downwards, causing the hopper 2 to reset. The spring rod releases its elasticity, assisting the hopper 2 to fall back to reset. As a preferred design, the mounting bracket 1 is also equipped with a guide support rod 105. The annular top plate 102 has a guide hole. The bottom end of the guide support rod 105 is fixed to the top surface of the annular support plate 101, and the top end passes through the guide hole. On the one hand, it can provide a stable guiding effect, preventing the annular top plate 102 from tilting or swaying relative to the annular support plate 101 when it moves, ensuring its smooth and reliable movement. On the other hand, it can further enhance the overall rigidity of the structure. As a preferred design, the base 100 of the mounting bracket 1 has a discharge port. The discharge gate 200 of the hopper 2 is located above the discharge port, which facilitates the centralized discharge of materials.

[0036] Hopper 2 (see Figure 1 , Figure 2 The annular top plate 102 is fixed on the outer circumferential surface of the hopper 2. The hopper 2 is located in the annular support plate 101, and the bottom of the hopper 2 is provided with a discharge door 200 that can be opened and closed. Specifically, during the weighing stage, the discharge door 200 is closed, and during the unloading stage, the discharge door 200 is opened to facilitate the unloading of materials.

[0037] Multiple self-resetting lifting mechanisms 3 (see) Figure 4The self-resetting lifting mechanism 3 includes a load cell and a telescopic power cylinder 5, both fixed to the top surface of the annular support plate 101. Specifically, the telescopic power cylinder 5 can be configured as a pneumatic cylinder, hydraulic cylinder, or electric cylinder. The telescopic power cylinder 5 includes a piston rod 500 capable of extending and retracting vertically. When the piston rod 500 extends upward and pushes against the bottom surface of the annular top plate 102, the load cell disengages from the bottom surface of the annular top plate 102. When the piston rod 500 retracts downward and disengages from the bottom surface of the annular top plate 102, the load cell contacts the bottom surface of the annular top plate 102. As a preferred design, the telescopic power cylinder 5 includes two adjacent piston rods 500, which are fixedly connected by a connecting block 504 (see [reference]). Figure 4 The two piston rods 500, together with the connecting block 504, can form a stable H-shaped structure, allowing the two piston rods 500 to extend and retract synchronously. Compared with a single rod, its bending section modulus can be greatly increased, making it less prone to bending and more stable. Preferably, the self-resetting lifting mechanism 3 is provided with three parts.

[0038] The basic working principle of the self-resetting lifting hopper scale involved in this invention is as follows: This technical solution sets up a mounting bracket 1, a hopper 2, and multiple self-resetting lifting mechanisms 3. The base 100, annular support plate 101, and fixed support rod 103 jointly support the self-resetting lifting mechanism 3. The base 100, annular top plate 102, and telescopic support rod 104 jointly support and suspend the hopper 2. During the weighing stage, material is loaded into the hopper 2. Under the action of the material's gravity, the hopper 2 drives the annular top plate 102 to move downwards towards the annular support plate 101. At this time, the telescopic support rod 104 retracts downwards, and the bottom surface of the annular top plate 102 abuts against the sensing end of the weighing sensor and applies pressure. The weighing sensor collects the weight data of the material, completing the material weighing. During the unloading stage, the piston rod 500 of the telescopic power cylinder 5 extends upwards, and its top... The end of the cylinder abuts against and pushes against the bottom surface of the annular top plate 102, and the annular top plate 102 drives the hopper 2 to move upward away from the annular support plate 101, thereby lifting the hopper 2. At this time, the telescopic support rod 104 is stretched, and the load cell disengages from the bottom surface of the annular top plate 102. This design allows the load cell to temporarily disengage from the load-bearing state and no longer bear the weight of the hopper 2 and the material, effectively avoiding dynamic interference and additional force during unloading that could cause serious measurement errors in the load cell. During the reset phase, after unloading is completed, the piston rod 500 of the telescopic power cylinder 5 retracts downward. Under the gravity of the hopper 2 and the reset action of the telescopic power cylinder 5, the hopper 2 falls back to its initial position, the piston rod 500 disengages from the bottom surface of the annular top plate 102, and the load cell re-engages with the bottom surface of the annular top plate 102, preparing for the next weighing.

[0039] See Figures 1 to 8 The present invention will be further described below with reference to a specific embodiment:

[0040] In this embodiment, see Figure 4 , Figure 5 As a preferred design, the self-resetting lifting mechanism 3 also includes a centering structure, which includes a centering top block 600 (see...). Figure 6 The system comprises a fixed post 601, a sliding sleeve 602, and multiple ball screws. The top of the centering top block 600 is fixed to the bottom surface of the annular top plate 102, and a circular groove 603 is provided at its bottom end. Multiple bolt holes 604 are provided on the side of the centering top block 600, and the bolt holes 604 are connected to the circular groove 603. The bottom end of the fixed post 601 is fixed to the top surface of the annular support plate 101, and the top end is located in the circular groove 603. The sliding sleeve 602 is fitted onto the fixed post 601 and can slide up and down along the fixed post 601. When the sliding sleeve 602 slides into the circular groove 603, the sliding sleeve... The outer peripheral surface of 602 is fitted against the inner wall of the circular groove 603. Multiple ball screws are screwed into multiple bolt holes 604 and abut against the outer peripheral surface of the fixing post 601. Specifically, the ball screw is existing technology, comprising a threaded outer shell, an internal spring, and steel balls; the specific structure is not described in detail. The steel balls of the ball screw abut against the outer peripheral surface of the fixing post 601. In use, the sliding sleeve 602 is slid upwards into the circular groove 603, ensuring that the distance between any point on the outer peripheral surface of the fixing post 601 and any point on the inner wall of the circular groove 603 is equal. At this time, the... Multiple ball screws are screwed into multiple bolt holes 604, with one end of each ball screw abutting against the outer circumferential surface of the fixing post 601. The sliding sleeve 602 is slid downwards and placed on the top surface of the annular support plate 101. During the unloading stage, this prevents the centering block 600 from colliding with the sliding sleeve 602. Through the centering structure, regardless of the radial deviation between the centering block 600 and the fixing post 601 before the sliding sleeve 602 enters the circular groove 603, once the sliding sleeve 602 enters the circular groove 603, the central axis of the centering block 600 and the central axis of the fixing post 601 will be aligned. Both components can automatically align and achieve self-centering, while maintaining a constant radial gap between them. The ball screws provide preload, preventing the centering block 600 from wobbling relative to the fixed column 601 and maintaining a stable centering state. This design ensures that the hopper 2 returns to its initial position of contact with the load cell accurately and consistently after each lifting, avoiding incomplete or deviated reset due to friction, assembly gaps, material residue, or other factors between parts. This effectively prevents the load cell from shifting its force point, improving the repeatability and accuracy of weighing.

[0041] In this embodiment, see Figure 5As a preferred design, the self-resetting lifting mechanism 3 also includes a limiting block 501. The top of the limiting block 501 is fixed to the bottom surface of the annular top plate 102, and a limiting conical hole 502 is formed at the bottom (see...). Figure 7 The piston rod 500 has a limiting cone surface 503 at its top end that mates with the limiting cone hole 502 (see [link]). Figure 8 When the piston rod 500 extends upward, its limiting cone surface 503 extends into the limiting cone hole 502. When the piston rod 500 retracts downward, its limiting cone surface 503 extends out of the limiting cone hole 502. By setting the limiting cone hole 502 and the limiting cone surface 503, the two are self-centering structures. When the piston rod 500 moves upward, the limiting cone surface 503 will automatically slide into the center position along the inclined surface of the limiting cone hole 502 and automatically align itself, avoiding the hopper 2 from shifting during lifting. Furthermore, when the limiting cone surface 503 is fully inserted into the limiting cone hole 502, the two form a surface contact, which can withstand a large axial force and a certain radial force, thereby achieving reliable upper limit positioning. The overall structure is simple and the connection is reliable.

[0042] In this embodiment, see Figure 4 , Figure 5As a preferred design, the weighing sensor includes a sensor body 400, a control body, and a force transmission structure. The sensor body 400 is fixed to the top surface of the annular support plate 101 and is used to measure the weight of the hopper and materials. The control body is electrically connected to the sensor body 400 and is used to zero the measurement data of the sensor body 400. The force transmission structure includes a force transmission base 403, a force transmission ball 402, and a force transmission top block 401. The bottom of the force transmission base 403 is connected to the sensor body 400, and the top has a semi-circular groove. The force transmission ball 402 is disposed in the semi-circular groove, and the force transmission top block 401... The top is fixed to the bottom surface of the annular top plate 102, and the bottom has a horizontal contact surface that can contact the force transmission ball 402. During use, in the weighing phase, the hopper 2 and the material move the annular top plate 102 downwards. The horizontal contact surface of the force transmission block 401 pushes the force transmission ball 402 downwards, transmitting the force to the sensor body 400. The sensor body 400 converts the force into an electrical signal, thereby measuring the weight of the material in the hopper 2. The control body can reset the measurement data of the sensor body 400 after each weighing to ensure accuracy. Traditional force transmission structures... Typically, the force-transmitting sphere 402 is enclosed by two semi-circular structures. When subjected to material impact, equipment vibration, or even slight misalignment during installation, the force-transmitting sphere 402 can shift, causing non-linear errors in the sensor output. In this embodiment, the horizontal contact surface and the force-transmitting sphere 402 have point contact. When a horizontal force is present, the force-transmitting sphere 402 can slide freely on the horizontal contact surface until it is restricted by the alignment structure. This prevents the horizontal force from generating an effective component in the vertical direction, ensuring that the force in the vertical direction is almost entirely equal to the weight of the object, significantly improving its resistance to lateral interference. The semi-circular groove can play a role in automatic centering. When the horizontal contact surface shakes or shifts, under the action of the centering structure, as long as the position of the force transmission ball 402 is restricted, the gravity will always pass through the center of the force transmission ball 402 and act vertically downwards on the lowest point of the lower semicircle. By setting the semi-circular groove and the horizontal contact surface, the lateral component force caused by the tilt of the contact surface between the force transmission base 403, the force transmission ball 402, and the force transmission top block 401 can be effectively avoided, thus avoiding nonlinear error in the output of the sensor body 400. This helps to ensure the repeatability of multiple measurements and makes the weight detection results more reliable.

[0043] In this embodiment, see Figure 4 As a preferred design, the self-resetting lifting mechanism 3 also includes a base plate 7, which is fixed to the top surface of the annular support plate 101. The weighing sensor, telescopic power cylinder 5, and fixed column 601 are all fixed on the base plate 7, which provides stable load bearing and improves the stability of the connection.

[0044] As can be seen from the above, the self-resetting lifting hopper scale of the present invention has the following beneficial effects:

[0045] 1. During the weighing stage, the hopper scale of this application has high weighing accuracy and good stability. The weight of the hopper acts directly and stably on the weighing sensor through the annular top plate, which can reduce the influence of lateral force on the measurement to a certain extent and improve weighing accuracy and stability.

[0046] 2. During the unloading stage, the hopper scale of this application can effectively avoid interference with the weighing sensor during the unloading process. The telescopic power cylinder 5 lifts the hopper 2 as a whole, so that the weighing sensor is completely separated from the annular top plate 102. In this way, the shaking, impact and dynamic force generated by the material flow of the hopper 2 during unloading will not act on the weighing sensor, thereby avoiding measurement errors, drift or even sensor damage.

[0047] 3. During the reset phase, the hopper scale of this application resets accurately, and the weighing sensor can be zeroed every time. The centering structure enables the hopper 2 to fall back to the initial position stably, ensuring that the starting state of each weighing is consistent. The force transmission structure can avoid nonlinear error in the output of the sensor body 400, thereby improving the repeatability and reliability of weighing.

[0048] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A self-resetting lifting hopper scale, characterized in that: include: The mounting bracket (1) includes a base (100), an annular support plate (101), an annular top plate (102), a fixed support rod (103), and a telescopic support rod (104). The bottom end of the fixed support rod (103) is fixed to the top of the base (100), and the top end is fixed to the bottom surface of the annular support plate (101). The bottom end of the telescopic support rod (104) is also fixed to the top of the base (100), and the top end is fixed to the bottom surface of the annular top plate (102). The annular top plate (102) is located above the annular support plate (101), and the annular support plate (101) can drive the telescopic support rod (104) to extend and retract up and down. The hopper (2) has an annular top plate (102) fixed on the outer circumferential surface of the hopper (2). The hopper (2) is located in the annular support plate (101), and the bottom of the hopper (2) is provided with a discharge door (200) that can be opened and closed. Multiple self-resetting lifting mechanisms (3) are provided. Each self-resetting lifting mechanism (3) includes a weighing sensor and a telescopic power cylinder (5) that are all fixed on the top surface of the annular support plate (101). The telescopic power cylinder (5) includes a piston rod (500) that can extend and retract vertically. When the piston rod (500) extends upward and pushes the bottom surface of the annular top plate (102), the weighing sensor disengages from the bottom surface of the annular top plate (102). When the piston rod (500) retracts downward and disengages from the bottom surface of the annular top plate (102), the weighing sensor contacts the bottom surface of the annular top plate (102).

2. The self-resetting lifting hopper scale according to claim 1, characterized in that: The self-resetting lifting mechanism (3) also includes a centering structure, which includes a centering top block (600), a fixing column (601), a sliding sleeve (602), and multiple ball screws. The top of the centering top block (600) is fixed to the bottom surface of the annular top plate (102), and a circular groove (603) is provided at the bottom. Multiple bolt holes (604) are provided on the side of the centering top block (600), and the bolt holes (604) are connected to the circular groove (603). The bottom of the fixing column (601) is fixed to the bottom surface of the annular top plate (102). The top of the ring support plate (101) is fixed on the top surface, and the top end is located in the circular groove (603). The sliding sleeve (602) is fitted on the fixed post (601) and can slide up and down along the fixed post (601). When the sliding sleeve (602) slides into the circular groove (603), the outer peripheral surface of the sliding sleeve (602) is in contact with the inner wall surface of the circular groove (603). The multiple ball screws are respectively screwed into the multiple bolt holes (604) and abut against the outer peripheral surface of the fixed post (601).

3. The self-resetting lifting hopper scale according to claim 2, characterized in that: The self-resetting lifting mechanism (3) also includes a limiting top block (501). The top of the limiting top block (501) is fixed to the bottom surface of the annular top plate (102), and a limiting conical hole (502) is opened at the bottom. The top of the piston rod (500) is provided with a limiting conical surface (503) that cooperates with the limiting conical hole (502). When the piston rod (500) extends upward, its limiting conical surface (503) extends into the limiting conical hole (502). When the piston rod (500) retracts downward, its limiting conical surface (503) extends out of the limiting conical hole (502).

4. The self-resetting lifting hopper scale according to claim 2, characterized in that: The weighing sensor includes a sensor body (400), a control body, and a force transmission structure. The sensor body (400) is fixed on the top surface of the annular support plate (101) and is used to measure the weight of the hopper and the material. The control body is electrically connected to the sensor body (400) and is used to clear the measurement data of the sensor body (400). The force transmission structure includes a force transmission base (403), a force transmission ball (402), and a force transmission top block (401). The bottom of the force transmission base (403) is connected to the sensor body (400), and a semi-circular groove is provided on the top. The force transmission ball (402) is set in the semi-circular groove. The top of the force transmission top block (401) is fixed on the bottom surface of the annular top plate (102), and a horizontal contact surface is provided at the bottom that can contact the force transmission ball (402).

5. The self-resetting lifting hopper scale according to claim 2, characterized in that: The self-resetting lifting mechanism (3) also includes a base plate (7), which is fixed on the top surface of the annular support plate (101). The weighing sensor, telescopic power cylinder (5), and fixed column (601) are all fixed on the base plate (7).

6. The self-resetting lifting hopper scale according to claim 2, characterized in that: The mounting bracket (1) is also provided with a guide support rod (105), and a guide hole is provided on the annular top plate (102). The bottom end of the guide support rod (105) is fixed to the top surface of the annular support plate (101), and the top end passes through the guide hole.

7. The self-resetting lifting hopper scale according to claim 2, characterized in that: The mounting bracket (1) has a discharge port on its base (100), and the discharge gate (200) of the hopper (2) is located above the discharge port.

8. The self-resetting lifting hopper scale according to claim 2, characterized in that: The telescopic power cylinder (5) includes two adjacent piston rods (500), which are fixedly connected by a connecting block (504).

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