High-precision fully sealed force transmission beam and high-precision flexible belt scale

Abstract

The present invention discloses a high-precision, fully sealed force transmission beam for a flexible belt scale, comprising a support beam and a lever-type weighing structure. The support beam is a hollow tubular body, and the lever-type weighing structure is installed inside the support beam. The lever-type weighing structure comprises a force transmission bridge assembly, a central axis assembly, a force transmission seat assembly, and a weighing sensor. The force transmission bridge assembly is a lever beam of the lever-type weighing structure, with a force transmission seat assembly at one end and a weighing sensor at the other end. The central axis assembly is connected to the support beam at both ends, and the middle portion is connected to the middle portion of the force transmission bridge assembly as a fulcrum for the lever-type weighing structure, with at least one of the two connections being a movable connection. At least one end of the force transmission seat assembly extends beyond the surface of the support beam as a weighing force point. A corresponding high-precision flexible belt scale is also disclosed. The high-precision, fully sealed force transmission beam provided by the present invention has a high degree of integration, is simple and convenient to transport, install, debug, and operate, is dustproof, corrosion-resistant, and interference-resistant, and provides stable and highly accurate measurement data.

Description

Technical Field

[0001] The present invention relates to the field of weighing structures, in particular to the field of belt scale weighing, and specifically to a high-precision fully sealed force transmission beam for a flexible belt scale and a corresponding high-precision flexible belt scale. Background Art

[0002] A belt scale is an automatic weighing device that continuously weighs bulk materials on a conveyor belt without having to subdivide the mass or interrupt the movement of the conveyor belt. The weighing bridge of the belt scale is installed on the conveyor frame. When the material passes by, the metering frame (roller) detects the weight of the material on the belt conveyor and acts on the weighing sensor through a lever.

[0003] In the existing technology, the weighing module is composed of multiple components and is installed separately on the conveyor frame. The integration is not high, and there are problems such as inconvenience in transportation, installation, debugging, and operation. The fulcrum is easy to deviate and unstable during weighing, and the ability to resist lateral force and anti-interference is poor, which easily leads to unstable data and large errors. Summary of the Invention

[0004] The present invention provides a high-precision fully sealed force transmission beam for a flexible belt scale, which solves the problems existing in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-precision, fully sealed force transmission beam for a flexible belt scale comprises a support beam and a lever-type weighing structure, wherein the support beam is a hollow tubular body, and the lever-type weighing structure is installed inside the support beam; the lever-type weighing structure comprises a force transmission bridge assembly, a central axis assembly, a force transmission seat assembly and a weighing sensor; the force transmission bridge assembly is a lever beam of the lever-type weighing structure, with a force transmission seat assembly provided at one end and a weighing sensor provided at the other end; both ends of the central axis assembly are connected to the support beam, and the middle part is connected to the middle part of the force transmission bridge assembly as a fulcrum of the lever-type weighing structure, and at least one of the two connections is a movable connection; at least one end of the force transmission seat assembly extends out from the surface of the support beam as a weighing force point; after the weighing sensor interacts with the support beam, a corresponding signal is output to the outside.

[0007] Preferably, the support beam is a square tube and reinforcement plates are fixed to the four sides.

[0008] Further specifically but not restrictively, the force transmission bridge assembly includes a force transmission bridge and a force transmission bridge inner hole; the force transmission bridge inner hole is located in the middle part of the force transmission bridge, is a sleeve-shaped through hole, and is matched and connected with the central axis assembly.

[0009] Preferably, the external structure of the force transmission bridge is a square beam whose cross-sectional area gradually decreases from the middle to both ends, and its cross-sectional shape is a concave shape.

[0010] Further specifically but not restrictively, the central shaft assembly includes a central shaft, a bearing seat, a bearing and a sealing cover; the central shaft is connected to the middle part of the power transmission bridge assembly, and bearings are installed at both ends; the bearings are installed in cooperation with the bearing seat; the bearing seat is fixedly installed on the support beam; the sealing cover is installed on the outside of the bearing seat.

[0011] Preferably, four bearings are installed at each end of the central shaft.

[0012] Preferably, the central shaft is a stepped shaft, and the central shaft assembly further includes a locking nut, through which the stepped shaft, the bearing, and the bearing seat are fixed in corresponding positions.

[0013] Preferably, an expansion sleeve is used to tightly fit the central shaft body with the inner hole of the force transmission bridge.

[0014] Optionally, the force transmission seat assembly includes a force transmission seat, a pressure head rod, an upper thrust joint bearing, a first sealing gasket and a second sealing gasket; the force transmission seat as a whole is a hollow cylinder, which is arranged at one end of the force transmission bridge assembly; the pressure head rod is arranged on the upper thrust joint bearing, and the upper thrust joint bearing is installed at the corresponding step inside the force transmission seat, and the center point of the upper thrust joint bearing, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly provided with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the pressure head rod extends out of the upper surface of the support beam as a weighing force point and facilitates the installation of the force transmission seat assembly; the first sealing gasket cooperating with the pressure head rod is arranged at the through hole on the upper surface of the support beam, preferably made of elastic material; the second sealing gasket is arranged at the through hole on the lower surface of the support beam, and the two sealing gaskets play a role of sealing and dustproofing.

[0015] Preferably, a pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect to the first weighing frame.

[0016] Preferably, an exit ring is installed in the bottom groove below the pressure head rod, and the upper thrust joint bearing is installed below the exit ring; a base is installed below the upper thrust joint bearing, and the base is installed at the corresponding step inside the force transmission seat.

[0017] Furthermore, an O-shaped force plate is mounted in the through-hole on the upper surface of the support beam. The inner surface of the O-shaped force plate is provided with two symmetry planes parallel to the force arm line of the lever-type weighing structure. An O-shaped rubber ring is sleeved on the outer surface of the force transmission base at positions corresponding to the symmetry planes, and the first sealing gasket is disposed outside the O-shaped force plate. When the force transmission base assembly is disturbed by lateral forces, the O-shaped rubber ring and the O-shaped force plate provide automatic recovery and shock absorption, thereby reducing the impact of lateral forces on measurement accuracy.

[0018] Optionally, the force transmission seat assembly includes a force transmission seat, a hanging column, a lower thrust joint bearing, a first sealing gasket and a second sealing gasket; the force transmission seat as a whole is a hollow cylinder, which is arranged at one end of the force transmission bridge assembly; the hanging column is suspended on the lower thrust joint bearing, and the lower thrust joint bearing is installed at the corresponding step inside the force transmission seat, and the center point of the lower thrust joint bearing, the center point of the center axis assembly and the force concentration point at one end of the force transmission bridge assembly provided with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the hanging column extends out of the lower surface of the support beam as a weighing force point and facilitates the installation of the force transmission seat assembly; the first sealing gasket cooperating with the hanging column is arranged at the through hole on the lower surface of the support beam, preferably made of elastic material; the second sealing gasket is arranged at the through hole on the upper surface of the support beam.

[0019] Preferably, a ball joint bearing is installed below the suspension column, and the ball joint bearing is connected to the second weighing frame.

[0020] Furthermore, an O-shaped force plate is installed at the through hole on the lower surface of the support beam, and the inner surface of the O-shaped force plate is provided with two symmetry planes, and the symmetry planes are parallel to the force arm line direction of the lever-type weighing structure. An O-shaped rubber ring is provided on the outer surface of the force transmission seat at a position corresponding to the symmetry plane, and the first sealing gasket is arranged on the outside of the O-shaped force plate.

[0021] Optionally, the force transmission seat assembly includes an upper force transmission seat, a lower force transmission seat, a pressure head rod, a hanging column, an upper thrust joint bearing, a lower thrust joint bearing and a first sealing gasket; the upper force transmission seat and the lower force transmission seat are hollow cylinders as a whole, the upper force transmission seat is arranged at one end of the force transmission bridge assembly, and the lower force transmission seat is fixedly connected to the bottom of the upper force transmission seat; the pressure head rod is arranged on the upper thrust joint bearing, and the upper thrust joint bearing is installed at the corresponding step inside the upper force transmission seat; the hanging column is suspended on the lower thrust joint bearing, and the lower thrust close The joint bearing is installed on the corresponding step inside the upper force transmission seat. The center points of the two thrust joint bearings, the center point of the central shaft assembly and the force concentration point at one end of the force transmission bridge assembly equipped with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the pressure head rod and the hanging column extend out of the upper and lower surfaces of the support beam respectively as weighing force points and facilitate the installation of the force transmission seat assembly. The first sealing gasket is arranged at the through hole on the support beam and is made of elastic material.

[0022] Preferably, the force transmission seat assembly also includes a pressure head cap and a ball joint bearing; a pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect to the first weighing frame; a ball joint bearing is installed below the suspension column, and the ball joint bearing is connected to the second weighing frame.

[0023] Preferably, an exit ring is installed in the bottom groove below the pressure head rod, and the upper thrust joint bearing is installed below the exit ring; a base is installed below the upper thrust joint bearing, and the base is installed at the corresponding step inside the force transmission seat.

[0024] Furthermore, an O-shaped force plate is installed at the through hole on the surface of the support beam, and the inner surface of the O-shaped force plate is provided with two symmetry planes, and the symmetry planes are parallel to the force arm line direction of the lever-type weighing structure. O-shaped rubber rings are provided on the outer surfaces of the upper force transmitting seat and the lower force transmitting seat at positions corresponding to the symmetry planes, and the first sealing gasket is arranged on the outside of the O-shaped force plate.

[0025] Optionally, the force transmission seat assembly includes an upload force seat, a lower force transmission seat, a pressure head rod, a hanging column, two upper thrust joint bearings, a suspension point connector, a second rubber ring, a lower thrust joint bearing and a first sealing gasket; the upload force seat and the lower force transmission seat are hollow cylinders as a whole, the upload force seat is arranged at one end of the force transmission bridge assembly, and the lower force transmission seat is fixedly connected to the bottom of the upload force seat; the pressure head rod is arranged on the upper upper thrust joint bearing, and the lower upper thrust joint bearing is installed at the step corresponding to the force transmission seat, and the two upper thrust joint bearings are connected by the suspension point connector, and the outer periphery of the suspension point connector is provided with the second rubber ring. , the second rubber ring cooperates with the inner wall of the force transmission seat; the suspension column is suspended on the lower thrust joint bearing, and the lower thrust joint bearing is installed on the corresponding step inside the force transmission seat. The center points of the upper thrust joint bearing and the lower thrust joint bearing below, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the pressure head rod and the suspension column extend out of the upper and lower surfaces of the support beam respectively as weighing force points, and the first sealing gasket is arranged at the through hole on the support beam, which is an elastic material.

[0026] Preferably, the force transmission seat assembly also includes a pressure head cap, a ball joint bearing and a base; the pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect the first weighing frame; the lower bottom surface of the upper thrust joint bearing below is installed on the base, and the base is installed on the corresponding step inside the upper force transmission seat; the ball joint bearing is installed below the suspension column, and the ball joint bearing is connected to the second weighing frame.

[0027] Furthermore, an O-shaped force plate is installed at the through hole on the surface of the support beam, and the inner surface of the O-shaped force plate is provided with two symmetry planes, and the symmetry planes are parallel to the force arm line direction of the lever-type weighing structure. O-shaped rubber rings are provided on the outer surfaces of the upper force transmitting seat and the lower force transmitting seat at positions corresponding to the symmetry planes, and the first sealing gasket is arranged on the outside of the O-shaped force plate.

[0028] Optionally, the force transmission seat assembly includes an upper force transmission seat, a lower force transmission seat, a pressure head rod, a suspension column, a spherical radial joint bearing and a first sealing gasket; the upper force transmission seat and the lower force transmission seat are hollow cylinders as a whole, the upper force transmission seat is arranged at one end of the force transmission bridge assembly, and the lower force transmission seat is fixedly connected to the lower part of the upper force transmission seat; the pressure head rod is arranged above the spherical radial joint bearing, and the suspension column is suspended below the spherical radial joint bearing, the pressure head rod and the suspension column are fixedly connected to the inner ring of the spherical radial joint bearing and the axes are in a straight line, and the outer ring of the spherical radial joint bearing The ring is installed in the corresponding groove inside the upper force transmission seat, and the center point of the spherical radial joint bearing, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly equipped with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the pressure head rod and the hanging column respectively extend out of the upper and lower surfaces of the support beam as weighing force points and facilitate the installation of the force transmission seat assembly. The first sealing gasket is arranged at the through hole on the support beam, preferably made of elastic material, to play a sealing and dust-proof role.

[0029] Preferably, the force transmission seat assembly also includes a pressure head cap and a ball joint bearing; a pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect to the first weighing frame; a ball joint bearing is installed below the suspension column, and the ball joint bearing is connected to the second weighing frame.

[0030] Furthermore, an O-shaped force plate is installed at the through hole on the surface of the support beam, and the inner surface of the O-shaped force plate is provided with two symmetry planes, and the symmetry planes are parallel to the force arm line direction of the lever-type weighing structure. O-shaped rubber rings are provided on the outer surfaces of the upper force transmitting seat and the lower force transmitting seat at positions corresponding to the symmetry planes, and the first sealing gasket is arranged on the outside of the O-shaped force plate.

[0031] Preferably, the weighing sensor is a cantilever beam sensor.

[0032] The present invention also discloses a high-precision flexible belt scale, which also includes a first weighing frame, a second weighing frame, a belt and a conveyor frame; the force transmission beam is installed on the conveyor frame of the belt scale; the first weighing frame includes a weighing frame body, an upper connecting plate, a weighing frame shaft, a rubber bearing and a weighing guide roller; the weighing frame body is connected to the upper weighing force point of the force transmission beam through the upper connecting plate; two rubber bearings are welded on the other side of the weighing frame body corresponding to the upper connecting plate, and the weighing frame shaft passes through the inner ring of the rubber bearing and cooperates with it; both ends of the weighing frame shaft are fixedly installed on the conveyor frame; the belt is arranged on the weighing guide roller, and the weighing guide roller is arranged on the weighing frame body; the second weighing frame includes a weighing frame body, a lower connecting plate, a rubber bearing, a weighing frame shaft and a weighing guide roller; the second weighing frame is connected to the lower weighing force point of the force transmission beam through the lower connecting plate; the second weighing frame and the first weighing frame are symmetrically arranged on the other side of the force transmission beam about the central axis of the force transmission seat assembly.

[0033] According to actual production needs, another high-precision flexible belt scale is also disclosed, which adopts the technical solution of a single weighing frame, including the above-mentioned high-precision fully sealed force transmission beam, weighing frame, belt and conveyor frame for flexible belt scale; the force transmission beam is installed on the conveyor frame of the belt scale; the weighing frame includes a weighing frame body, a connecting plate, a weighing frame shaft, a rubber bearing and a weighing guide roller; the weighing body is connected to the weighing force point of the force transmission beam through the connecting plate; two rubber bearings are welded on the other side of the weighing frame body corresponding to the connecting plate, and the weighing frame shaft passes through the inner ring of the rubber bearing and cooperates with it; both ends of the weighing frame shaft are fixedly installed on the conveyor frame; the belt is arranged on the weighing guide roller, and the weighing guide roller is arranged on the weighing frame body.

[0034] Furthermore, the high-precision belt scale mentioned above also includes a signal processing and display unit, which is connected to the weighing sensor, processes the signal output by the weighing sensor accordingly, and then displays it for the operator to identify or connect to other devices for calculation.

[0035] The working principle of the present invention is as follows: when a heavy object applies force to the weighing force point on the force transmission beam, the force transmission seat assembly moves downward around the central axis assembly (the fulcrum of the lever-type weighing structure) under this force. According to the principle of lever movement, the other end of the force transmission bridge assembly (the end connected to the weighing sensor) moves upward and generates a force between it and the support beam. At this time, the lever-type weighing structure reaches a balanced state, and the weighing sensor outputs a corresponding signal to the outside, thereby achieving the purpose of weighing.

[0036] The beneficial effects of the present invention are:

[0037] The high-precision fully sealed force transmission beam for a flexible belt scale provided by the present invention has a simple structure, a high degree of integration, is simple and convenient to transport, install, debug and operate, is dustproof, corrosion-resistant and interference-resistant, and can be integrated with the conveyor frame of the belt scale. The weighing sensor is sealed inside the support beam and is not affected by external environmental factors. The measurement data is stable and highly accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0039] Figure 1 This is the main view of the flexible belt scale with a force transmission beam;

[0040] Figure 2 This is a top view of a flexible belt scale with a force transmission beam;

[0041] Figure 3 It is the right side view of the force transmission beam;

[0042] Figure 4 is a schematic diagram of the force transmission bridge assembly;

[0043] Figure 5 Is the center axis component along Figure 3 Cross-sectional view along line AA;

[0044] Figure 6 It is an optional structure of the force transmission seat assembly. Figure 3 Cross-sectional view along the midline BB;

[0045] Figure 7 It is another optional structure of the force transmission seat assembly. Figure 3 Cross-sectional view along the midline BB;

[0046] Figure 8 It is an optimal structure of the force transmission seat assembly. Figure 3 Cross-sectional view along the midline BB;

[0047] Figure 9 It is another preferred structure of the force transmission seat assembly. Figure 3 Cross-sectional view along the midline BB;

[0048] Figure 10 It is another preferred structure of the force transmission seat assembly. Figure 3 Cross-sectional view along the midline BB;

[0049] Figure 11 yes Figure 2A partial enlarged view of point C in the middle (top view of the force transmission seat assembly).

[0050] In the figure: 1. First weighing frame; 2. Upper connecting plate; 3. Lower connecting plate; 4. Force transmission beam; 5. Square tube; 6. Reinforcement plate; 7. Force transmission bridge; 8. Sensor mounting plate; 9. Weighing sensor; 10. Inner hole of force transmission bridge; 11. Center shaft; 12. Expansion sleeve; 13. Bearing seat; 14. Copper washer; 15. Sealing cover; 16. Pressure head cap; 17. First sealing gasket; 18. O-type force plate; 19. Pressure head rod; 20. O-type rubber ring; 21. Force transmission seat; 22. Exit ring; 23. Upper thrust spherical bearing; 24. Base; 25. Hanging column; 26. Lower thrust spherical bearing; 27. Lower force transmission seat; 28. Ball head spherical bearing; 29. ​​Transport fixing strip; 30. Scale frame mounting plate; 31. Conveyor rack; 32. Spherical radial spherical bearing; 33. Second sealing gasket; 34. Suspension point connector; 35. Second rubber ring; 36. Locking nut; 100. Second weighing frame; 101. Scale frame body; 102. Rubber bearing; 103. Scale frame shaft; 104. Weighing guide roller. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 any creative efforts shall fall within the scope of protection of the present invention.

[0052] In the description of the present invention, unless otherwise specified, "plurality" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "left end," and "right end" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify the present invention. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are intended solely to facilitate description and should not be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," "installed," and "disposed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0054] The present invention provides a high-precision fully sealed force transmission beam for a flexible belt scale, such as Figures 1 to 3 As shown, the force transmission beam 4 is located in the middle of the two weighing sections of the belt scale. The upper connecting plate 2 is connected to the first weighing frame 1, and the lower connecting plate 3 is connected to the second weighing frame 1. The force transmission beam 4 is located at the center of the two weighing frames 1. When bulk material is transported above the two weighing frames 1, gravity causes the two weighing frames 1 to move downward. The upper connecting plate 2 presses on the pressure head cap 16, and the lower connecting plate 3 pulls the ball joint bearing 28 downward. The force transmission seat is forced downward as a whole, and the force transmission bridge 7 performs a lever motion around the central axis 11. The weighing sensor 9 moves upward and presses on the inner wall of the square tube 5, thereby sensing the weight of the material and achieving the purpose of weighing.

[0055] The high-precision fully sealed force transmission beam for a flexible belt scale of the present invention comprises a support beam and a lever-type weighing structure, wherein the lever-type weighing structure comprises a force transmission bridge assembly, a central shaft assembly and a force transmission seat assembly, which are respectively Figures 4 to 10 shown.

[0056] like Figure 3 As shown in the figure, as an optional embodiment of the present invention, the support beam comprises a square tube 5. Specifically, reinforcement plates 6 are fixed to each of the four sides of the square tube 5. This enhances the structural strength of the square tube and ensures installation accuracy. A threaded hole is provided in the square tube 5 for mounting a transport fixing bar 29, which secures the force transmission bridge assembly to the inside of the square tube 5 during transportation, protecting the relevant components from damage caused by shaking and collision during transportation, which could affect measurement accuracy.

[0057] like Figure 4 As shown, the force transmission bridge assembly in the lever-type weighing structure transmits force. The assembly comprises a force transmission bridge 7 and a force transmission bridge inner hole 10. The force transmission bridge 7 is shaped like a square beam with a cross-sectional area that tapers from the center toward the ends. Its concave cross-section reduces its weight, volume, and material usage while maintaining its compressive strength and rigidity, facilitating installation and commissioning. A load cell 9 is fixedly mounted on the left end of the force transmission bridge 7, while the right end is fixedly connected to the force transmission base assembly. The force transmission bridge inner hole 10, located in the middle of the force transmission bridge 7, is a sleeve-shaped through-hole that mates with the central axis assembly.

[0058] like Figure 5 As shown, the central shaft assembly serves as the fulcrum of the entire lever-type weighing structure, including the central shaft 11, the bearing seat 13, the bearing and the sealing cover 15; the middle of the central shaft 11 and the inner hole 10 of the power transmission bridge (see Figure 4) are matched and connected, with bearings installed at both ends, and the bearings are matched and installed with the bearing seat 13; the bearing seat 13 is fixedly installed on the square tube 5; the outer side of the bearing seat 13 is equipped with a copper pad 14 and a sealing cover 15, which play a role in dust and corrosion prevention, reducing bearing wear, and preventing materials or dust from falling into the internal space of the entire device during operation, affecting its weighing accuracy.

[0059] Specifically, four bearings are installed in the bearing seat 13, that is, four bearings are tightly connected in series at both ends of the center shaft 11. This solution can prevent the center shaft 11 from generating radial vibration without affecting the rotation, and the positioning accuracy can reach the micron level, thereby counteracting the disturbance of the lateral force on the lever-type weighing structure and ensuring the measurement accuracy.

[0060] Specifically, the central shaft 11 is a stepped shaft, and the stepped shaft, the bearing, and the bearing seat 13 are fixed in corresponding positions by a locking nut 36 so that the stepped shaft does not move left and right and remains stable.

[0061] Specifically, the central shaft 11 is tightly matched with the inner hole 10 of the power transmission bridge by using the expansion sleeve 12. The expansion sleeve has a long service life and high strength. It relies on friction transmission, does not weaken the connected parts, and there is no relative movement. It will not cause wear during operation. It is easy to disassemble, has good interchangeability, and is easy to maintain.

[0062] The force transmission seat assembly is used as a weighing force-bearing component, which transmits the material gravity to the weighing sensor 9 for output measurement through the force transmission bridge assembly and the central shaft assembly. In order to facilitate the assembly of parts, the force transmission seat body can be divided into two parts: the upper force transmission seat 21 and the lower force transmission seat 27.

[0063] As an optional embodiment of the present invention, Figure 6 As shown, the force transmission seat assembly includes a first sealing gasket 17, a pressure head rod 19, a force transmission seat 21, an upper thrust joint bearing 23 and a second sealing gasket 33; the force transmission seat 21 is a hollow cylinder as a whole and is welded to one end of the force transmission bridge 7; the pressure head rod 19 is arranged on the upper thrust joint bearing 23, and the upper thrust joint bearing 23 is installed on the step corresponding to the force transmission seat 21; the center point of the upper thrust joint bearing 23, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly provided with the weighing sensor 9 are located on the same center line; The thrust joint bearing 23 provides a floating positioning fulcrum for the pressure head rod 19, concentrates the vertical force of the weight, and improves the ability of the lever-type weighing structure to resist external interference; through holes are provided on the upper and lower surfaces of the square tube 5 corresponding to the installation position of the upper force transmission seat 21, so that the pressure head rod 19 extends out from the upper surface of the square tube 5 as a weighing force point and facilitates the installation of the force transmission seat assembly. The first sealing gasket 17 and the second sealing gasket 33 are respectively arranged at the through holes on the upper and lower surfaces of the square tube 5 to play a sealing and dust-proof role. The first sealing gasket 17 that cooperates with the pressure head rod is preferably made of elastic material.

[0064] Specifically, the force transmission seat assembly further includes a pressure head cap 16 , which is fixedly connected to the top of the pressure head rod 19 with bolts and is used to connect to the first weighing frame 1 .

[0065] Specifically, the force transmission seat assembly includes an exit ring 22 and a base 24. The exit ring 22 is mounted in the bottom groove below the pressure head rod 19, and the upper thrust spherical bearing 23 is mounted below the exit ring 22. The lower surface of the upper thrust spherical bearing 23 is mounted on the base 24, which is mounted on a corresponding step inside the upper force transmission seat 21. The exit ring 22 facilitates the removal of the upper thrust spherical bearing 23 during disassembly, and the base 24 is used to position and secure the thrust spherical bearing.

[0066] Specifically, an O-shaped force plate 18 is installed at the through hole on the upper surface of the square tube 5. The inner surface of the O-shaped force plate 18 is provided with two symmetric planes, which are parallel to the force arm line direction of the lever-type weighing structure. An O-shaped rubber ring 20 is sleeved on the outer surface of the force transmitting seat 21 at a position corresponding to the symmetric plane. The first sealing gasket 17 is arranged on the outer side of the O-shaped force plate 18. When the force transmitting seat assembly is disturbed by lateral force, the O-shaped rubber ring and the O-shaped force plate play the role of automatic recovery and shock absorption positioning, thereby reducing the influence of lateral force on measurement accuracy (see Figure 11 The four bearings in the bearing seat 13 can be positioned to the micron level, but the resolution of the weighing sensor is one in 100,000. Therefore, the lateral offset of the force transmission bridge assembly and the force transmission seat assembly as a whole will still affect the measurement accuracy. The O-type force plate 18 and O-type rubber ring 20 are used to limit the force transmission seat assembly so that it can be dynamically adjusted within an acceptable offset range, thereby improving the measurement accuracy and system stability.

[0067] As an optional embodiment of the present invention, Figure 7As shown, the force transmission seat assembly includes a first sealing gasket 17, a hanging column 25, a lower thrust joint bearing 26, a lower force transmission seat 27 and a second sealing gasket 33; the lower force transmission seat 27 is a hollow cylinder as a whole and is welded to one end of the force transmission bridge 7; the hanging column 25 is suspended on the lower thrust joint bearing 26, and the lower thrust joint bearing 26 is installed on the corresponding step inside the lower force transmission seat 27. The center point of the lower thrust joint bearing 26, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly provided with a weighing sensor are located on the same center line. ; The lower thrust joint bearing 26 provides a floating positioning fulcrum for the hanging column 25, concentrates the vertical force of the weight, and improves the ability of the lever-type weighing structure to resist external interference; through holes are provided on the upper and lower surfaces of the square tube 5 corresponding to the installation position of the lower force transmission seat 27, so that the hanging column 25 extends out of the lower surface of the square tube 5 as a weighing force point and facilitates the installation of the force transmission seat assembly. The second sealing gasket 33 and the first sealing gasket 17 are respectively arranged at the through holes on the upper and lower surfaces of the square tube 5 to play a sealing and dust-proof role. The first sealing gasket 17 that cooperates with the hanging column is preferably made of elastic material.

[0068] Specifically, the force transmission seat assembly further includes a ball joint bearing 28 , which is installed below the suspension column 25 and is used to connect to the second weighing frame 100 .

[0069] Specifically, an O-shaped force plate 18 is mounted in the through-hole on the lower surface of the square tube 5. Two symmetry planes are defined on the inner surface of the O-shaped force plate 18, parallel to the lever arm line of the lever-type weighing structure. An O-shaped rubber ring 20 is sleeved on the outer surface of the lower force transmission seat 27 at positions corresponding to the symmetry planes. The first sealing gasket 17 is disposed outside the O-shaped force plate 18. When the force transmission seat assembly is disturbed by lateral forces, the O-shaped rubber ring and the O-shaped force plate provide automatic recovery and cushioning, reducing the impact of lateral forces.

[0070] As a preferred embodiment of the present invention, Figure 8As shown, the force transmission seat assembly includes an upper force transmission seat 21, a lower force transmission seat 27, a pressure head rod 19, a hanging column 25, an upper thrust joint bearing 23, a lower thrust joint bearing 26 and a first sealing gasket 17; the upper force transmission seat 21 and the lower force transmission seat 27 are hollow cylinders as a whole, the upper force transmission seat 21 is welded to one end of the force transmission bridge 7, and the lower force transmission seat 27 is fixedly connected to the bottom of the upper force transmission seat 21 with bolts; the pressure head rod 19 is arranged on the upper thrust joint bearing 23, and the upper thrust joint bearing 23 is installed at the corresponding step of the upper force transmission seat 21; the hanging column 25 is suspended on the lower thrust joint bearing 26, and the lower thrust joint bearing 26 is installed at the corresponding step inside the upper force transmission seat 21, The center points of the two thrust joint bearings, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly equipped with a weighing sensor 9 are located on the same center line; the two thrust joint bearings provide floating positioning fulcrums for the pressure head rod 19 and the hanging column 25, concentrate the vertical force of the heavy object, and improve the ability of the lever-type weighing structure to resist external force interference; through holes are provided on the upper and lower surfaces of the square tube 5 corresponding to the installation position of the upper force transmission seat 21, so that the pressure head rod 19 and the hanging column 25 respectively extend out of the upper and lower surfaces of the square tube 5 as weighing force points and facilitate the installation of the force transmission seat assembly. The first sealing gasket 17 is arranged at the through hole on the square tube 5 to play a sealing and dustproof role, and is preferably made of elastic material.

[0071] Specifically, the force transmission base assembly also includes a pressure head cap 16 and a ball joint bearing 28. The pressure head cap 16 is bolted to the top of the pressure head rod 19 and is used to connect to the first weighing frame 1. The ball joint bearing 28 is installed below the suspension column 25 and is connected to the second weighing frame 100. The left and right weighing frames realize dual-frame weighing, which not only increases the weighing range, but also balances the torque of the weight on the force transmission bridge assembly, reducing weighing errors and further achieving accurate weighing.

[0072] Specifically, the force transmission seat assembly also includes an exit ring 22 and a base 24; the exit ring 22 is installed in the bottom groove below the pressure head rod 19, and the upper thrust joint bearing 23 is installed below the exit ring 22; the lower bottom surface of the upper thrust joint bearing 23 is installed on the base 24, and the base 24 is installed on the corresponding step inside the upper force transmission seat 21.

[0073] Specifically, an O-shaped force plate 18 is installed at the through hole on the surface of the square tube 5. The inner surface of the O-shaped force plate 18 is provided with two symmetric planes, which are parallel to the force arm line direction of the lever-type weighing structure. O-shaped rubber rings 20 are sleeved on the outer surfaces of the upper force base 21 and the lower force base 27 at positions corresponding to the symmetric planes. The first sealing gasket 17 is arranged on the outer side of the O-shaped force plate 18. When the force base assembly is disturbed by lateral force, the O-shaped rubber ring and the O-shaped force plate play the role of automatic recovery and shock absorption positioning, thereby reducing the influence of lateral force (see Figure 11 ).

[0074] As another preferred embodiment of the present invention, Figure 9 As shown, the force transmission seat assembly includes an upper force transmission seat 21, a lower force transmission seat 27, a pressure head rod 19, a hanging column 25, two upper thrust joint bearings 23, a suspension point connector 34, a second rubber ring 35, a lower thrust joint bearing 26 and a first sealing gasket 17; the upper force transmission seat 21 and the lower force transmission seat 27 are hollow cylinders as a whole, the upper force transmission seat 21 is welded to one end of the force transmission bridge 7, and the lower force transmission seat 27 is fixedly connected to the lower part of the upper force transmission seat 21 with bolts; the pressure head rod 19 is arranged on the upper thrust close The upper thrust joint bearing 23 below is installed on the step corresponding to the force upload seat 21. The two upper thrust joint bearings 23 are connected by a suspension point connector 34. The outer periphery of the suspension point connector 34 is provided with a second rubber ring 35. The second rubber ring 35 cooperates with the inner wall of the force upload seat 21 to keep the suspension point connector 34 vertically applying force to the upper thrust joint bearing 23 below. This arrangement can shorten the length of the pressure head rod 19 and prevent the pressure head rod 19 from being pressed under heavy load. When the object or external force rotates around the thrust joint bearing, it collides with the force transmission seat 21 and affects the measurement accuracy; the hanging column 25 is suspended on the lower thrust joint bearing 26, and the lower thrust joint bearing 26 is installed on the corresponding step inside the force transmission seat 21. The center point of the upper thrust joint bearing 23 and the lower thrust joint bearing 26, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly with the weighing sensor 9 are located on the same center line; these three thrust joint bearings provide floating positioning fulcrums for the pressure head rod 19 and the hanging column 25, concentrate the vertical force of the heavy object, and improve the ability of the lever-type weighing structure to resist external force interference; through holes are provided on the upper and lower surfaces of the square tube 5 corresponding to the installation position of the force transmission seat 21, so that the pressure head rod 19 and the hanging column 25 extend out of the upper and lower surfaces of the square tube 5 respectively as weighing force points and facilitate the installation of the force transmission seat assembly. The first sealing gasket 17 is provided at the through hole on the square tube 5 to play a sealing and dustproof role, and is preferably made of elastic material.

[0075] Specifically, the force transmission seat assembly also includes a pressure head cap 16, a base 24, and a ball joint bearing 28. The pressure head cap 16 is fixedly connected to the top of the pressure head rod 19 with bolts, and is used to connect to the first weighing frame 1. The lower bottom surface of the upper thrust joint bearing 23 below is installed on the base 24, and the base 24 is installed on the corresponding step inside the upper force transmission seat 21. A ball joint bearing 28 is installed below the hanging column 25, and the ball joint bearing 28 is connected to the second weighing frame 100. The left and right weighing frames realize double-frame weighing, which not only increases the range of the weighing section, but also balances the torque of the weight on the force transmission bridge assembly, reduces the weighing error, and further realizes precise weighing.

[0076] Specifically, an O-shaped force plate 18 is installed at the through hole on the surface of the square tube 5. The inner surface of the O-shaped force plate 18 is provided with two symmetry planes, which are parallel to the force arm line direction of the lever-type weighing structure. O-shaped rubber rings 20 are sleeved on the outer surfaces of the upper force base 21 and the lower force base 27 at positions corresponding to the symmetry planes. The first sealing gasket 17 is arranged on the outer side of the O-shaped force plate 18. When the force base assembly is disturbed by lateral force, the O-shaped rubber ring and the O-shaped force plate play the role of automatic recovery and shock absorption positioning, thereby reducing the influence of lateral force (see Figure 11 ).

[0077] As another preferred embodiment of the present invention, Figure 10 As shown, the force transmission seat assembly includes an upper force transmission seat 21, a lower force transmission seat 27, a pressure head rod 19, a suspension column 25, a spherical radial joint bearing 32 and a first sealing gasket 17; the upper force transmission seat 21 and the lower force transmission seat 27 are hollow cylinders as a whole, the upper force transmission seat 21 is welded to one end of the force transmission bridge 7, and the lower force transmission seat 27 is fixedly connected to the lower part of the upper force transmission seat 21 with bolts; the pressure head rod 19 is arranged above the spherical radial joint bearing 32, and the suspension column 25 is suspended below the spherical radial joint bearing 32. The pressure head rod and the suspension column are fixedly connected to the inner ring of the spherical radial joint bearing 32 and their axes are in a straight line. The outer ring of the spherical radial spherical bearing 32 is installed on the corresponding step inside the upper force transmission seat 21. The center point of the spherical radial spherical bearing 32, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly equipped with a weighing sensor 9 are located on the same center line; through holes are provided on the upper and lower surfaces of the square tube 5 corresponding to the installation position of the force transmission seat 21, so that the pressure head rod 19 and the hanging column 25 respectively extend out of the upper and lower surfaces of the square tube 5 as weighing force points and facilitate the installation of the force transmission seat assembly. The first sealing gasket 17 is provided at the through hole on the square tube 5 to play a sealing and dustproof role, and is preferably made of elastic material.

[0078] Specifically, the force transmission base assembly also includes a pressure head cap 16 and a ball joint bearing 28. The pressure head cap 16 is bolted to the top of the pressure head rod 19 and is used to connect to the first weighing frame 1. A ball joint bearing 28 is mounted below the suspension column 25 and is connected to the second weighing frame 100. The two left and right weighing frames enable dual-frame weighing, which not only increases the weighing range but also balances the torque exerted by the weight on the force transmission bridge assembly, reducing weighing errors and further achieving precise weighing.

[0079] Specifically, an O-shaped force plate 18 is installed at the through hole on the surface of the square tube 5. The inner surface of the O-shaped force plate 18 is provided with two symmetry planes, which are parallel to the force arm line direction of the lever-type weighing structure. O-shaped rubber rings 20 are sleeved on the outer surfaces of the upper force base 21 and the lower force base 27 at positions corresponding to the symmetry planes. The first sealing gasket 17 is arranged on the outer side of the O-shaped force plate 18. When the force base assembly is disturbed by lateral force, the O-shaped rubber ring and the O-shaped force plate play the role of automatic recovery and shock absorption positioning, thereby reducing the influence of lateral force (see Figure 11 ).

[0080] like Figure 1 、 Figure 2 As shown, the present invention also provides a high-precision flexible belt scale, which is characterized in that it includes the high-precision fully sealed force transmission beam 4 for the flexible belt scale, the first weighing frame 1, the second weighing frame 100, the belt and the conveyor frame 31; the force transmission beam 4 is installed on the conveyor frame 31 of the belt scale; the first weighing frame 1 includes a weighing frame body 101, an upper connecting plate 2, a rubber bearing 102, a weighing frame shaft 103 and a weighing guide roller 104; the first weighing frame 1 is connected to the upper weighing force point of the force transmission beam through the upper connecting plate 2; two rubber bearings 102 are welded on the other side of the weighing frame body 101 corresponding to the upper connecting plate 2, and the weighing frame The shaft 103 passes through the inner ring of the rubber bearing 102 and cooperates with it; both ends of the weighing frame shaft 103 are fixedly mounted on the conveyor frame 31 through the weighing frame mounting plate 30; the belt is arranged on the weighing guide roller 104, and the weighing guide roller 104 is arranged on the weighing frame body 101; the second weighing frame 1 includes a weighing frame body 101, a lower connecting plate 3, a rubber bearing 102, a weighing frame shaft 103 and a weighing guide roller 104; the second weighing frame 100 is connected to the lower weighing force point of the force transmission beam through the lower connecting plate 3; the second weighing frame 100 and the first weighing frame 1 are symmetrically arranged on the other side of the force transmission beam 4 about the central axis of the force transmission seat assembly. The center point of the rubber bearing and the center of the force transfer seat assembly (i.e. the center point of the thrust joint bearing) are on the same horizontal plane, forming a stable triangular structure. The center of weighing (i.e. the center of the force transfer seat assembly) remains stationary, and the length of the weighing section is fixed. There is a rubber bearing at the connection between the weighing frame and the conveyor frame, which is a flexible connection. The belt has elasticity and tension, and is the weighing plane, which is also a flexible connection. The dynamic balance of force can be achieved during weighing, and the weighing accuracy is therefore more accurate.

[0081] According to actual production needs, the high-precision flexible belt scale can also adopt a solution of setting only one weighing frame, and the setting method of the weighing frame is the same as the setting method of one of the above-mentioned bilateral weighing frames.

[0082] Specifically, this high-precision flexible belt scale also includes a signal processing and display unit, which is connected to a weighing sensor, processes the signal output by the weighing sensor accordingly, and then displays it for the operator to identify or connect to other devices for calculation.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-precision, fully sealed force transmission beam for a flexible belt scale, comprising a support beam and a lever-type weighing structure, wherein the support beam is a hollow tubular body, and the lever-type weighing structure is installed inside the support beam; the lever-type weighing structure comprises a force transmission bridge assembly, a central axis assembly, a force transmission seat assembly and a weighing sensor; the force transmission bridge assembly is a lever beam of the lever-type weighing structure, one end of which is provided with a force transmission seat assembly, and the other end is provided with a weighing sensor; the central axis assembly comprises a central axis, a bearing seat, and a bearing, and the central axis is connected to the middle part of the force transmission bridge assembly as a fulcrum of the lever-type weighing structure, and bearings are installed at both ends; the bearing is installed in cooperation with the bearing seat; the bearing seat is fixedly installed on the support beam; at least one end of the force transmission seat assembly extends out of the surface of the support beam as a weighing force point; after the weighing sensor interacts with the support beam, a corresponding signal is output to the outside.

2. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 1, characterized in that: The support beam is a square tube and reinforcement plates are fixed on all four sides.

3. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 1, characterized in that: The force transmission bridge assembly includes a force transmission bridge and an inner hole of the force transmission bridge; the inner hole of the force transmission bridge is located in the middle part of the force transmission bridge, is a sleeve-shaped through hole, and is matched with the central axis.

4. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 3, characterized in that: The external structure of the force transmission bridge is a square beam whose cross-sectional area gradually decreases from the middle to the two ends, and its cross-sectional shape is a concave shape.

5. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 3, characterized in that: The central shaft assembly further includes a sealing cover, which is installed on the outer side of the bearing seat.

6. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 5, characterized in that: The central shaft body is tightly matched with the inner hole of the force transmission bridge by using an expansion sleeve.

7. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 1, characterized in that: The central shaft assembly further includes a sealing cover, which is installed on the outer side of the bearing seat.

8. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 7, characterized in that: Four bearings are respectively installed at both ends of the central shaft.

9. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 7, characterized in that: The central shaft is a stepped shaft, and the central shaft assembly further includes a locking nut, through which the stepped shaft, the bearing, and the bearing seat are fixed in corresponding positions.

10. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 5, characterized in that: The central shaft is a stepped shaft, and the central shaft assembly also includes a locking nut, which fixes the stepped shaft, bearing, and bearing seat in corresponding positions; four bearings are installed at each end of the central shaft; and an expansion sleeve is used to tightly fit the central shaft body with the inner hole of the force transmission bridge.

11. The high-precision fully sealed force transmission beam for a flexible belt scale according to any one of claims 1 to 10, characterized in that: The force transmission seat assembly includes a force transmission seat, a pressure head rod, an upper thrust joint bearing, a first sealing gasket and a second sealing gasket; the force transmission seat as a whole is a hollow cylinder, which is arranged at one end of the force transmission bridge assembly; the pressure head rod is arranged on the upper thrust joint bearing, and the upper thrust joint bearing is installed at the corresponding step inside the force transmission seat, and the center point of the upper thrust joint bearing, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly provided with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the pressure head rod extends out of the upper surface of the support beam as a weighing force point; the first sealing gasket that cooperates with the pressure head rod is arranged at the through hole on the upper surface of the support beam, and is made of elastic material; the second sealing gasket is arranged at the through hole on the lower surface of the support beam.

12. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 11, characterized in that: A pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect to the first weighing frame.

13. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 11, characterized in that: An exit ring is installed in the bottom groove below the pressure head rod, and the upper thrust joint bearing is installed below the exit ring; a base is installed below the upper thrust joint bearing, and the base is installed at the corresponding step inside the force transmission seat.

14. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 11, characterized in that: An O-shaped force plate is installed at the through hole on the upper surface of the support beam. The inner surface of the O-shaped force plate is provided with two symmetry planes. The symmetry planes are parallel to the force arm line direction of the lever-type weighing structure. An O-shaped rubber ring is provided on the outer surface of the force transmission seat at a position corresponding to the symmetry plane. The first sealing gasket is arranged on the outside of the O-shaped force plate.

15. The high-precision fully sealed force transmission beam for a flexible belt scale according to any one of claims 1 to 10, characterized in that: The force transmission seat assembly includes a force transmission seat, a hanging column, a lower thrust joint bearing, a first sealing gasket and a second sealing gasket; the force transmission seat as a whole is a hollow cylinder, which is arranged at one end of the force transmission bridge assembly; the hanging column is suspended on the lower thrust joint bearing, and the lower thrust joint bearing is installed at the corresponding step inside the force transmission seat, and the center point of the lower thrust joint bearing, the center point of the center axis assembly and the force concentration point at one end of the force transmission bridge assembly provided with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the hanging column extends out of the lower surface of the support beam as a weighing force point; the first sealing gasket cooperating with the hanging column is arranged at the through hole on the lower surface of the support beam, and is made of elastic material; the second sealing gasket is arranged at the through hole on the upper surface of the support beam.

16. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 15, characterized in that: A ball joint bearing is installed below the suspension column, and the ball joint bearing is connected to the second weighing frame.

17. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 15, characterized in that: An O-shaped force plate is installed at the through hole on the lower surface of the support beam. The inner surface of the O-shaped force plate is provided with two symmetry planes. The symmetry planes are parallel to the force arm line direction of the lever-type weighing structure. An O-shaped rubber ring is provided on the outer surface of the force transmission seat at a position corresponding to the symmetry plane. The first sealing gasket is arranged on the outside of the O-shaped force plate.

18. The high-precision fully sealed force transmission beam for a flexible belt scale according to any one of claims 1 to 10, characterized in that: The force transmission seat assembly includes an upper force transmission seat, a lower force transmission seat, a pressure head rod, a hanging column, an upper thrust joint bearing, a lower thrust joint bearing and a first sealing gasket; the upper force transmission seat and the lower force transmission seat are hollow cylinders as a whole, the upper force transmission seat is arranged at one end of the force transmission bridge assembly, and the lower force transmission seat is fixedly connected to the bottom of the upper force transmission seat; the pressure head rod is arranged on the upper thrust joint bearing, and the upper thrust joint bearing is installed at the corresponding step inside the upper force transmission seat; the hanging column is suspended on the lower thrust joint bearing, and the lower thrust joint bearing is installed at the corresponding step inside the upper force transmission seat, the center points of the two thrust joint bearings, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly provided with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the pressure head rod and the hanging column extend out of the upper and lower surfaces of the support beam respectively as weighing force points, and the first sealing gasket is arranged at the through hole on the support beam and is made of elastic material.

19. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 18, characterized in that: The force transmission seat assembly also includes a pressure head cap and a ball joint bearing; a pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect to the first weighing frame; a ball joint bearing is installed below the suspension column, and the ball joint bearing is connected to the second weighing frame.

20. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 18, characterized in that: A withdrawal ring is installed in the bottom groove below the pressure head rod, and the upper thrust joint bearing is installed below the withdrawal ring; a base is installed below the upper thrust joint bearing, and the base is installed on the corresponding step inside the upper force transmission seat.

21. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 18, characterized in that: An O-shaped force plate is installed at the through hole on the surface of the support beam. The inner surface of the O-shaped force plate is provided with two symmetry planes. The symmetry planes are parallel to the force arm line direction of the lever-type weighing structure. O-shaped rubber rings are provided on the outer surfaces of the upper force seat and the lower force seat at positions corresponding to the symmetry planes. The first sealing gasket is arranged on the outside of the O-shaped force plate.

22. The high-precision fully sealed force transmission beam for a flexible belt scale according to any one of claims 1 to 10, characterized in that: The force transmission seat assembly includes an upper force transmission seat, a lower force transmission seat, a pressure head rod, a hanging column, two upper thrust joint bearings, a suspension point connector, a second rubber ring, a lower thrust joint bearing and a first sealing gasket; the upper force transmission seat and the lower force transmission seat are hollow cylinders as a whole, the upper force transmission seat is arranged at one end of the force transmission bridge assembly, and the lower force transmission seat is fixedly connected to the lower part of the upper force transmission seat; the pressure head rod is arranged on the upper upper thrust joint bearing, and the lower upper thrust joint bearing is installed at the step corresponding to the force transmission seat, and the two upper thrust joint bearings are connected by the suspension point connector, and the outer periphery of the suspension point connector is provided with the second rubber ring, the first The two rubber rings are matched with the inner wall of the force transmission seat; the suspension column is suspended on the lower thrust joint bearing, and the lower thrust joint bearing is installed on the corresponding step inside the force transmission seat. The center points of the upper thrust joint bearing and the lower thrust joint bearing below, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the pressure head rod and the suspension column extend out from the upper and lower surfaces of the support beam respectively as weighing force points, and the first sealing gasket is provided at the through hole on the support beam and is made of elastic material.

23. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 22, characterized in that: The force transmission seat assembly also includes a pressure head cap, a ball joint bearing and a base; the pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect the first weighing frame; the lower bottom surface of the upper thrust joint bearing below is installed on the base, and the base is installed on the corresponding step inside the upper force transmission seat; the ball joint bearing is installed below the suspension column, and the ball joint bearing is connected to the second weighing frame.

24. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 22, characterized in that: An O-shaped force plate is installed at the through hole on the surface of the support beam. The inner surface of the O-shaped force plate is provided with two symmetry planes. The symmetry planes are parallel to the force arm line direction of the lever-type weighing structure. O-shaped rubber rings are provided on the outer surfaces of the upper force seat and the lower force seat at positions corresponding to the symmetry planes. The first sealing gasket is arranged on the outside of the O-shaped force plate.

25. The high-precision fully sealed force transmission beam for a flexible belt scale according to any one of claims 1 to 10, characterized in that: The force transmission seat assembly includes an upper force transmission seat, a lower force transmission seat, a pressure head rod, a hanging column, a spherical radial joint bearing and a first sealing gasket; the upper force transmission seat and the lower force transmission seat are hollow cylinders as a whole, the upper force transmission seat is arranged at one end of the force transmission bridge assembly, and the lower force transmission seat is fixedly connected to the lower part of the upper force transmission seat; the pressure head rod is arranged above the spherical radial joint bearing, and the hanging column is suspended below the spherical radial joint bearing, the pressure head rod and the hanging column are fixedly connected to the inner ring of the spherical radial joint bearing and the axes of the two are arranged in a straight line, so The outer ring of the spherical radial joint bearing is installed on the corresponding step inside the upper force transmission seat. The center point of the spherical radial joint bearing, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly equipped with a weighing sensor are located on the same center line; through holes are provided on the upper and lower surfaces of the support beam corresponding to the installation position of the force transmission seat assembly, so that the pressure head rod and the hanging column extend out of the upper and lower surfaces of the support beam respectively as weighing force points. The first sealing gasket is arranged at the through hole on the support beam and is made of elastic material.

26. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 25, characterized in that: The force transmission seat assembly also includes a pressure head cap and a ball joint bearing; the pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect to the first weighing frame; the ball joint bearing is installed below the suspension column, and the ball joint bearing is connected to the second weighing frame.

27. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 25, characterized in that: An O-shaped force plate is installed at the through hole on the surface of the support beam. The inner surface of the O-shaped force plate is provided with two symmetry planes. The symmetry planes are parallel to the force arm line direction of the lever-type weighing structure. O-shaped rubber rings are provided on the outer surfaces of the upper force seat and the lower force seat at positions corresponding to the symmetry planes. The first sealing gasket is arranged on the outside of the O-shaped force plate.

28. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 1, characterized in that: The weighing sensor is a cantilever beam sensor.

29. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 1, characterized in that: The support beam is a square tube and reinforcement plates are fixed to the four sides; the weighing sensor is a cantilever beam sensor; the force transmission bridge assembly includes a force transmission bridge and an inner hole of the force transmission bridge; the inner hole of the force transmission bridge is located in the middle part of the force transmission bridge and is a sleeve-shaped through hole, which is matched with the central shaft; the central shaft assembly also includes an expansion sleeve, a locking nut and a sealing cover; the central shaft is a stepped shaft, and the stepped shaft and the bearing and the bearing seat are fixed in corresponding positions by the locking nut; the stepped shaft and the inner hole of the force transmission bridge are tightly connected by an expansion sleeve, and four bearings are installed at both ends; the bearings are matched with the bearing seats; The bearing seat is fixedly mounted on the square tube; the sealing cover is installed on the outer side of the bearing seat; the force transmission seat assembly includes an upper force transmission seat, a lower force transmission seat, a pressure head rod, a hanging column, an upper thrust joint bearing, a lower thrust joint bearing, an exit ring, a base, a pressure head cap, a ball joint bearing and a first sealing gasket; the upper force transmission seat and the lower force transmission seat are hollow cylinders as a whole, the upper force transmission seat is arranged at one end of the force transmission bridge assembly, and the lower force transmission seat is fixedly connected to the bottom of the upper force transmission seat; an exit ring is installed in the bottom groove below the pressure head rod, and the upper thrust joint bearing is installed below the exit ring; a bottom groove is installed below the upper thrust joint bearing The base is installed at the corresponding step inside the force transmission seat; a pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect the first weighing frame; the hanging column is suspended on the lower thrust joint bearing, and a ball head joint bearing is installed under the hanging column, and the ball head joint bearing is connected to the second weighing frame; the lower thrust joint bearing is installed at the corresponding step inside the force transmission seat, and the sphere center points of the upper thrust joint bearing and the lower thrust joint bearing, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly provided with a weighing sensor are located on the same center line; corresponding to the force transmission seat assembly, Through holes are provided on the upper and lower surfaces of the square tube at the installation position, so that the pressure head rod and the hanging column extend out of the upper and lower surfaces of the square tube respectively as weighing force points and facilitate the installation of the force transmission seat assembly. The sealing gasket is arranged at the through hole on the square tube, and the sealing gasket is made of elastic material; an O-shaped force plate is installed at the through hole, and the inner surface of the O-shaped force plate is provided with two symmetry planes, and the symmetry planes are parallel to the direction of the force arm line of the lever-type weighing structure. O-shaped rubber rings are provided on the outer surfaces of the upper force seat and the lower force transmission seat at positions corresponding to the symmetry planes, and the first sealing gasket is arranged on the outside of the O-shaped force plate.

30. The high-precision fully sealed force transmission beam for a flexible belt scale according to claim 1, characterized in that: The support beam is a square tube and reinforcement plates are fixed on all four sides; the weighing sensor is a cantilever beam sensor; the force transmission bridge assembly includes a force transmission bridge and an inner hole of the force transmission bridge; the inner hole of the force transmission bridge is located in the middle part of the force transmission bridge and is a sleeve-shaped through hole, which is matched with the center shaft; the center shaft assembly also includes a locking nut, an expansion sleeve and a sealing cover; the center shaft is a stepped shaft, and the stepped shaft and the bearing and the bearing seat are fixed in corresponding positions by the locking nut; the stepped shaft and the inner hole of the force transmission bridge are tightly connected with an expansion sleeve, and four bearings are installed at both ends; the bearings are matched with the bearing seats; the bearing seat is fixed Installed on the square tube; the sealing cover is installed on the outer side of the bearing seat; the force transmission seat assembly includes an upper force transmission seat, a lower force transmission seat, a pressure head rod, a hanging column, two upper thrust joint bearings, a suspension point connector, a second rubber ring, a lower thrust joint bearing and a first sealing gasket; the upper force transmission seat and the lower force transmission seat are hollow cylinders as a whole, the upper force transmission seat is arranged at one end of the force transmission bridge assembly, and the lower force transmission seat is fixedly connected to the bottom of the upper force transmission seat; the pressure head rod is arranged on the upper thrust joint bearing, and the lower upper thrust joint bearing is installed at the step corresponding to the force transmission seat, and the two upper thrust joint bearings are connected by the suspension point connector. The outer periphery of the suspension point connector is sleeved with the second rubber ring, which cooperates with the inner wall of the force transmission seat; a pressure head cap is fixedly installed above the pressure head rod, and the pressure head cap is used to connect the first weighing frame; the suspension column is suspended on the lower thrust joint bearing, and a ball joint bearing is installed below the suspension column, and the ball joint bearing is connected to the second weighing frame; the lower thrust joint bearing is installed at the corresponding step inside the force transmission seat, and the spherical center points of the upper thrust joint bearing and the lower thrust joint bearing below, the center point of the central axis assembly and the force concentration point at one end of the force transmission bridge assembly equipped with a weighing sensor are located on the same center line; the corresponding Through holes are provided on the upper and lower surfaces of the square tube at the installation position of the force transmission seat assembly, so that the pressure head rod and the hanging column extend out of the upper and lower surfaces of the square tube respectively as weighing force points and facilitate the installation of the force transmission seat assembly. The sealing gasket is arranged at the through hole on the square tube, and the sealing gasket is made of elastic material; an O-shaped force plate is installed at the through hole, and the inner surface of the O-shaped force plate is provided with two symmetry planes, and the symmetry planes are parallel to the direction of the force arm line of the lever-type weighing structure. O-shaped rubber rings are provided on the outer surfaces of the upper force seat and the lower force transmission seat at positions corresponding to the symmetry planes, and the first sealing gasket is arranged on the outside of the O-shaped force plate.

31. A high-precision flexible belt scale, characterized in that The invention comprises a high-precision fully sealed force transmission beam for a flexible belt scale according to any one of claims 1-10 and 18-30, and further comprises a first weighing frame, a second weighing frame, a belt and a conveyor frame; the force transmission beam is installed on the conveyor frame of the belt scale; the first weighing frame comprises a weighing frame body, an upper connecting plate, a weighing frame shaft, a rubber bearing and a weighing guide roller; the weighing frame body is connected to the upper weighing force point of the force transmission beam through the upper connecting plate; two rubber shafts are welded on the other side of the weighing frame body corresponding to the upper connecting plate The weighing frame shaft passes through the inner ring of the rubber bearing and cooperates with it; both ends of the weighing frame shaft are fixedly installed on the conveyor frame; the belt is arranged on the weighing guide roller, and the weighing guide roller is arranged on the weighing frame body; the second weighing frame includes a weighing frame body, a lower connecting plate, a rubber bearing, a weighing frame shaft and a weighing guide roller; the second weighing frame is connected to the lower weighing force point of the force transmission beam through the lower connecting plate; the second weighing frame and the first weighing frame are symmetrically arranged on the other side of the force transmission beam with respect to the central axis of the force transmission seat assembly.

32. The high-precision flexible belt scale according to claim 31, characterized in that It also includes a signal processing and display unit, which is connected to the weighing sensor, processes the signal output by the weighing sensor accordingly, and then displays it for the operator to identify.

33. A high-precision flexible belt scale, characterized in that It comprises a high-precision fully sealed force transmission beam for a flexible belt scale according to any one of claims 1 to 17, and also comprises a weighing frame, a belt and a conveyor frame; the force transmission beam is installed on the conveyor frame of the belt scale; the weighing frame comprises a weighing frame body, a connecting plate, a weighing frame shaft, a rubber bearing and a weighing guide roller; the weighing frame body is connected to the weighing force point of the force transmission beam through the connecting plate; two of the rubber bearings are welded to the other side of the weighing frame body corresponding to the connecting plate, and the weighing frame shaft passes through the inner ring of the rubber bearing and cooperates with it; both ends of the weighing frame shaft are fixedly mounted on the conveyor frame; the belt is arranged on the weighing guide roller, and the weighing guide roller is arranged on the weighing frame body.

34. The high-precision flexible belt scale according to claim 33, characterized in that It also includes a signal processing and display unit, which is connected to the weighing sensor, processes the signal output by the weighing sensor accordingly, and then displays it for the operator to identify.

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