A lifting assembly for a grain container

Abstract

This utility model relates to the field of grain testing technology, and provides a lifting assembly for a grain bulk density meter. The lifting assembly includes a support plate, a fixing mechanism, and a first driving component. A track is formed on the support plate, with a first portion extending vertically at the bottom and a second portion extending horizontally at the top. The first portion and the second portion are connected. The fixing mechanism is used to connect the material box, with a portion connected to the first driving component and another portion extending to the track. This lifting assembly drives the fixing mechanism through the first driving component and is guided by a track of a specific shape, realizing the automatic lifting, translation, and tilting of the material box from the weighing station to the grain cylinder. This completely replaces the traditional manual handling of the material box, eliminates the influence of human factors on the testing cycle, and enables continuous and rapid bulk density testing, improving the efficiency and automation level of the entire testing process.

Description

Technical Field

[0001] This utility model relates to the field of grain testing technology, and in particular to a lifting component for a grain bulk density meter. Background Technology

[0002] Bulk density is one of the key indicators for evaluating grain quality; it refers to the mass of grain per unit volume. Measuring bulk density is of great significance for grain grading, purchasing, storage, and processing. A grain bulk density meter is a specialized device used to measure the bulk density of grain. Its basic principle is: first, a standard container (capacity cylinder) is used to measure a quantity of grain, then the mass of this portion of grain is weighed, and finally the bulk density is calculated.

[0003] In existing grain bulk density meters, measurements are usually taken manually, which is a cumbersome process that is not only inefficient but also makes it difficult to guarantee the accuracy of the measurements. Utility Model Content

[0004] This invention provides a lifting component for a grain bulk density meter to avoid the problems of cumbersome, inefficient, and inaccurate existing manual measurement processes.

[0005] This utility model provides a lifting assembly for a grain bulk density meter, the grain bulk density meter comprising: a grain cylinder assembly, a capacity cylinder assembly, a weighing assembly, and a lifting assembly; the grain cylinder assembly comprises: a grain cylinder and an intermediate cylinder; the capacity cylinder assembly comprises: a capacity cylinder and a rotating mechanism; the rotating mechanism is adapted to drive the opening of the capacity cylinder to be opposite to the intermediate cylinder or the weighing assembly; the weighing assembly is used to mount a material box; The lifting assembly includes a support plate, a fixing mechanism, and a first driving member. A track is formed on the support plate, the bottom of the track has a first portion extending vertically, and the top of the track has a second portion extending horizontally. The first portion and the second portion are in communication. The fixing mechanism is used to connect the feed box. A portion of the fixing mechanism is connected to the first driving member, and a portion of the fixing mechanism extends to the track. The first driving member is configured to drive the fixing mechanism to move under the guidance of the track, guiding the feed box connected to the fixing mechanism to move vertically along the track and then horizontally, so as to pour the grain in the feed box into the grain container.

[0006] According to the present invention, a lifting assembly for a grain bulk density meter is provided, wherein the fixing mechanism is provided with a guide portion, and the guide portion is slidably embedded in the track.

[0007] According to the present invention, a lifting assembly for a grain bulk density meter is provided, wherein the guide portion includes: a connecting shaft and rollers; One end of the connecting shaft is connected to the fixing mechanism, and the other end is equipped with the roller; the roller is rotatably disposed within the track.

[0008] According to the present invention, a lifting assembly for a grain bulk density meter is provided, wherein the first driving component includes: a first motor, a first driving wheel, a first driven wheel, and a belt; The first driving wheel is connected to the output shaft of the first motor; the first driven wheel is disposed on the support plate; the belt is tensioned between the first driving wheel and the first driven wheel, and the belt is connected to the fixing mechanism to drive the fixing mechanism to move.

[0009] According to the present invention, a lifting assembly for a grain bulk density meter is provided, the lifting assembly further includes: a transport mechanism; The transport mechanism has a transport channel that connects to the weighing component for transporting the material box.

[0010] According to the present invention, a lifting assembly for a grain bulk density meter is provided, wherein the inlet and / or outlet of the weighing assembly is provided with an overlapping plate for connecting with the transport channel.

[0011] According to the present invention, a lifting assembly for a grain bulk density meter is provided, wherein the transport mechanism includes: a plurality of flat belt conveyor structures connected end to end in sequence, wherein one of the flat belt conveyor structures is connected to the inlet of the weighing assembly, and another flat belt conveyor structure is connected to the outlet of the weighing assembly.

[0012] According to the present invention, a lifting assembly for a grain bulk density meter is provided, each of the flat belt conveyor structures includes: a support frame, a flat belt, a second driving member, and a driven member; the support frame is arranged in a strip shape; the support frame has a channel through which the flat belt passes and forms a conveying surface above the support frame; one end of the flat belt is sleeved on the second driving member, and the other end of the flat belt is sleeved on the driven member; the second driving member and the driven member are detachably connected to both ends of the support frame, and the second driving member drives the flat belt to rotate.

[0013] According to the present invention, a lifting assembly for a grain bulk density meter is provided, wherein the second driving component includes a second driving wheel and a second motor, the driven component includes a second driven wheel, the driving wheel and the second driven wheel are located at both ends of the transport channel, one end of the flat belt is sleeved on the second driving wheel, the other end of the flat belt is sleeved on the second driven wheel, and the upper surface of the flat belt forms the conveying surface; the motor drives the driving wheel to rotate, the rotation of the driving wheel drives the flat belt to rotate, and the flat belt drives the second driven wheel to rotate.

[0014] According to the present invention, a lifting assembly for a grain bulk density meter is provided, wherein the fixing mechanism includes: a fixing plate, a movable plate, and a clamping plate; A portion of the fixed plate is connected to the first driving member, and a portion of the fixed plate extends to the track. The movable plate is slidably disposed on the fixed plate and is connected to the clamping plate. A clamping space for fixing and clamping the material box is formed between the movable plate and the clamping plate.

[0015] The lifting assembly provided by this invention drives a fixing mechanism through a first driving component and is guided by a track of a specific shape, realizing the automatic lifting, translation, and tilting of the material box from the weighing station to the grain hopper. This completely replaces the traditional manual handling of the material box, eliminates the influence of human factors on the testing cycle, and enables continuous and rapid bulk density testing, greatly improving the efficiency and automation level of the entire testing process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the grain bulk density device provided by this utility model.

[0018] Figure 2 This is a schematic diagram of the interior of the grain bulk density device provided by this utility model.

[0019] Figure 3 This is a schematic diagram of the lifting component provided by this utility model.

[0020] Figure 4 This is a schematic diagram of the flat belt conveyor structure provided by this utility model.

[0021] Figure label: 1. Grain hopper assembly; 11. Grain hopper; 12. Intermediate hopper; 2. Capacity cylinder assembly; 21. Capacity cylinder; 22. Rotating mechanism; 3. Weighing components; 4. Material box; 5. Server rack; 6. Transport mechanism; 61. Flat belt conveyor structure; 611. Support frame; 612. Second drive component; 613. Driven component; 614. Flat belt; 7. Lifting component; 71. Support plate; 72. Fixing mechanism; 721. Fixing plate; 722. Movable plate; 723. Clamping plate; 73. First driving component; 731. First driving wheel; 732. First driven wheel; 733. Belt; 74. Track; 75. Guide section. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The following is combined with Figures 1-4 This invention describes the lifting assembly for a grain bulk density meter.

[0024] In some embodiments, such as Figures 1 to 3 As shown, the lifting assembly 7 is used to install on a grain bulk density meter, which includes: a grain cylinder assembly 1, a capacity cylinder assembly 2, a weighing assembly 3, and the lifting assembly 7; the grain cylinder assembly 1 includes: a grain cylinder 11 and an intermediate cylinder 12; the capacity cylinder assembly 2 includes: a capacity cylinder 21 and a rotating mechanism 22; the rotating mechanism 22 is adapted to drive the opening of the capacity cylinder 21 to face the intermediate cylinder 12 or the weighing assembly 3; the weighing assembly 3 is used to mount a material box 4; the lifting assembly 7 includes: a support plate 71, a fixing mechanism 72, and a first driving member 73; a track 74 is formed on the support plate 71, and the track 74... The bottom has a first part extending vertically, and the top of the track 74 has a second part extending horizontally. The first part and the second part are connected. The fixing mechanism 72 is used to connect the material box 4. A part of the fixing mechanism 72 is connected to the first drive member 73. A part of the fixing mechanism 72 extends to the track 74. The first drive member 73 is configured to drive the fixing mechanism 72 to move under the guidance of the track 74. The material box 4 connected to the fixing mechanism 72 is guided to move vertically along the track 74 and then horizontally, so that the grain in the material box 4 is introduced into the grain cylinder 11.

[0025] In this embodiment, the grain cylinder assembly 1, the capacity cylinder assembly 2, and the weighing assembly 3 are housed in the cabinet 5. The lifting assembly 7 is located beside the cabinet 5. The lifting assembly 7 is used to guide grain into the grain cylinder assembly 1, which in turn receives and guides the grain to be tested. The capacity cylinder assembly 2 is used to measure the amount of grain. The rotating mechanism 22 drives the capacity cylinder 21 to rotate as a whole, so that its opening faces upwards and opposite the intermediate cylinder 12 when feeding is required, and faces downwards and opposite the weighing assembly 3 when unloading and weighing are required. The feed box 4 on the weighing assembly 3 is used to hold the grain and weigh it.

[0026] A track 74 of a specific shape is provided on the support plate 71. The track 74 is composed of a first part extending vertically from the bottom and a second part extending horizontally from the top, forming an inverted "L" shape. A fixing mechanism 72 is used to connect to and clamp the material box 4. A first driving member 73 drives the fixing mechanism 72 to move along the preset track 74, thereby causing the material box 4 to complete the vertical lifting movement and horizontal movement in sequence. Through this continuous action, the material box 4 is smoothly and accurately transported above the grain hopper 11, and then the grain contained in it is introduced into the grain hopper 11, preparing for subsequent bulk density measurement.

[0027] During operation, the grain-filled hopper 4 is placed onto the fixed mechanism 72 by an upstream conveyor or robotic arm. The first drive unit 73 is activated, pushing or pulling the fixed mechanism 72. Because a portion of the fixed mechanism 72 is embedded in the track 74, its movement is confined within the first section (vertical section) of the track 74. Under the power of the drive unit and the guidance of the track 74, the fixed mechanism 72 drives the grain hopper 4 to rise smoothly in the vertical direction.

[0028] When the fixing mechanism 72 moves to the top of the first section of the track 74, it naturally enters the second section (horizontal section) connected to it. The first drive member 73 continues to operate, pushing the fixing mechanism 72 to move along the horizontal section of the track 74. This process horizontally moves the feed box 4 from directly above the weighing assembly 3 to directly above the grain hopper 11.

[0029] When the feed hopper 4 reaches above the inlet of the grain hopper 11, the fixing mechanism 72 triggers a tilting mechanism (if the grain can be poured out completely, this mechanism is not triggered), pouring all the grain in the hopper into the grain hopper 11. The grain then enters the measuring cylinder 21 through the intermediate cylinder 12. The empty feed hopper 4 can be moved to the weighing assembly 3 again by the first drive component 73. Then, the rotating mechanism 22 drives the measuring cylinder assembly 2 to rotate as a whole, so that the opening of the measuring cylinder 21 faces upward and accurately aligns with the lower outlet of the intermediate cylinder 12. At this time, the grain flows out from the grain hopper 11 through the intermediate cylinder 12 and fills the measuring cylinder 21 until the measuring cylinder 21 is completely full and slightly overflows. Subsequently, the rotating mechanism 22 is activated, driving the entire measuring cylinder assembly 2 to rotate 180 degrees counterclockwise. Excess grain enters the feed hopper 4, zeroing the weighing assembly 3. At this time, the opening of the measuring cylinder 21 changes from facing upward to facing downward. With the opening facing downward, the grain accurately measured in the measuring cylinder 21 falls through the opening into the feed hopper 4 on the weighing assembly 3 below under the action of gravity. The weight sensor monitors the increase in weight in real time, and records the weight value after the reading stabilizes. The bulk density of the grain can be obtained from the mass and volume. After weighing, the hopper 4 containing the weighed grain is conveyed to the next processing station.

[0030] In some embodiments, such as Figure 1 and Figure 3 As shown, the fixing mechanism 72 is provided with a guide portion 75, which is slidably embedded in the track 74. During operation, when the first driving member 73 pushes the fixing mechanism 72, the force is transmitted to the guide portion 75. The guide portion 75 rolls or slides upward within the track 74 (initially in the vertical section), forcibly driving the entire fixing mechanism 72 to perform a vertical lift. When it reaches the connection between the vertical and horizontal sections, the guide portion 75 naturally enters the horizontal section under the action of the driving force, thereby guiding the fixing mechanism 72 to begin horizontal movement.

[0031] The guide section 75 includes a connecting shaft and a roller. One end of the connecting shaft (e.g., its shoulder or threaded end) is securely connected to the body of the fixing mechanism 72 by fasteners or an interference fit, making the connecting shaft an extension arm of the fixing mechanism 72. The other end of the connecting shaft (i.e., the free end) is fitted with a roller, which typically rotates freely relative to the connecting shaft via a bearing. Through the rigid connection of the connecting shaft and the low-resistance rolling action of the roller, the guide section 75 efficiently and precisely converts the power of the first driving member 73 into smooth movement of the fixing mechanism 72 along a specific path, greatly reducing resistance during movement, resulting in a smaller load on the first driving member 73, smoother and more efficient operation, while also reducing noise and component wear.

[0032] In some embodiments, such as Figure 1 and Figure 3As shown, the first driving component 73 includes: a first motor, a first driving wheel 731, a first driven wheel 732, and a belt 733; the first driving wheel 731 is connected to the output shaft of the first motor; the first driven wheel 732 is disposed on the support plate 71; the belt 733 is tensioned between the first driving wheel 731 and the first driven wheel 732, and the belt 733 is connected to the fixing mechanism 72 to drive the fixing mechanism 72 to move.

[0033] The first motor is usually fixed to the grain density meter. The first drive pulley 731 (such as a synchronous pulley or belt 733 pulley) is directly fixed to the output shaft of the first motor or connected to it, so that the rotational power of the motor can be directly output.

[0034] The first driven pulley 732 is rotatably mounted on the upper or distal end of the support plate 71 via a pivot, maintaining a certain center distance from the first driving pulley 731. A ring-shaped belt 733 (e.g., a timing belt or a flat belt 614) is fitted onto the first driving pulley 731 and the first driven pulley 732.

[0035] One straight section of the belt 733 is fixedly connected to a corresponding part of the fixing mechanism 72. When the first motor starts, it drives the first drive wheel 731 to rotate, which in turn drives the belt 733 to move through tooth meshing or friction. The moving belt 733 then pulls the fixing mechanism 72 to which it is fixed. Under the constraint and guidance of the guide part 75 of the fixing mechanism 72 and the groove of the track 74, the linear traction force provided by the belt 733 is converted into a compound motion of the fixing mechanism 72 and the material box 4 it carries. That is, it first rises along the vertical part of the track 74, then moves horizontally along the horizontal part of the track 74, and finally accurately delivers the material box 4 to the top of the grain hopper 11 to complete the unloading.

[0036] In some embodiments, such as Figure 1 As shown, the lifting component 7 also includes a transport mechanism 6; the transport mechanism 6 forms a transport channel, which is connected to the weighing component 3 for transporting the material box 4.

[0037] In this embodiment, the outlet / inlet of the transport channel is precisely aligned with the weighing component 3, thus forming a continuous material flow path. The specific workflow is as follows: an empty material box 4, or a material box 4 containing the grain to be tested from an upstream process, is transported to the end via the transport channel; after the lifting component 7 completes a series of operations such as grabbing, lifting, tilting, and returning the material box 4 to its original position, the empty material box 4 is transferred to the weighing component 3. After weighing, the transport mechanism 6 restarts, taking the empty material box 4, which has completed its unloading task, back from the weighing component 3 and transmitting it to the downstream workstation via the transport channel, preparing for the next work cycle.

[0038] The weighing assembly 3 is equipped with an overlap plate at its inlet and / or outlet for connection to the transport channel. This overlap plate is a fixed plate-like component; one side is flush with the worktable surface of the weighing assembly 3 (i.e., the platform where the material box 4 is placed), while the other side extends to and maintains a small and uniform gap with the end of the transport channel, or achieves a seamless connection through a flexible seal. This method forms a continuous transition plane, effectively eliminating height differences and gaps that may arise between the transport channel and the weighing platform due to assembly tolerances or relative movement.

[0039] In some embodiments, such as Figure 1 and Figure 4 As shown, the transport mechanism 6 includes: a plurality of flat belt conveyor structures 61 connected end to end in sequence, wherein one flat belt conveyor structure 61 is connected to the inlet of the weighing component 3, and another flat belt conveyor structure 61 is connected to the outlet of the weighing component 3.

[0040] Specifically, these flat belt conveyor structures 61 are arranged sequentially in space, with the end of one structure closely adjacent to or slightly overlapping the beginning of the next, ensuring a smooth and seamless transition of the material box 4 between different sections. One flat belt conveyor structure 61 at the beginning of the conveyor line is configured as the inlet section, its outlet end connecting to the inlet of the weighing component 3, responsible for accurately conveying empty or test-ready material boxes 4 from upstream to the weighing station. Correspondingly, one flat belt conveyor structure 61 at the end of the conveyor line is configured as the outlet section, its inlet end precisely connecting to the outlet of the weighing component 3, responsible for removing the material box 4 from the weighing station after weighing and sending it to the next process.

[0041] like Figure 4 As shown, each flat belt conveyor structure 61 includes: a support frame 611, a flat belt 614, a second drive member 612, and a driven member 613; the support frame 611 is arranged in a strip shape; the support frame 611 has a channel through which the flat belt 614 passes and forms a conveying surface above the support frame 611; one end of the flat belt 614 is sleeved on the second drive member 612, and the other end of the flat belt 614 is sleeved on the driven member 613; the second drive member 612 and the driven member 613 are detachably connected to both ends of the support frame 611, and the second drive member 612 drives the flat belt 614 to rotate.

[0042] In this embodiment, the support frame 611 is typically made of profiles or sheet metal and is arranged in a long strip shape, with U-shaped or grooved channels formed inside or on top. A flat belt 614 passes through this channel and forms a flat, continuous conveying surface above the support frame 611 for supporting and conveying the material box 4. The two ends of the flat belt 614 are respectively wrapped around the driving and driven components.

[0043] Specifically, one end (driving end) of the flat belt 614 is fitted onto the second drive member 612, which is typically a roller or drive wheel directly driven by a motor (such as a geared motor). The other end (driven end) of the flat belt 614 is fitted onto the driven member 613, which is typically a roller or idler pulley that serves for tensioning and reversing. The second drive member 612 and the driven member 613 are detachably connected to both ends of the support frame 611 via bearing seats or mounting plates (e.g., by bolt fixing). This detachable connection facilitates the installation, tension adjustment, and subsequent maintenance and replacement of the belt 733. During operation, the second drive member 612 starts, driving the flat belt 614 to circulate through friction, thereby using the friction between the belt 733 and the bottom of the material box 4 to move the material box 4 along the conveying direction.

[0044] In this embodiment, the second driving member 612 includes a second driving wheel and a second motor, and the driven member 613 includes a second driven wheel. The driving wheel and the second driven wheel are located at both ends of the transport channel. One end of the flat belt 614 is sleeved on the second driving wheel, and the other end of the flat belt 614 is sleeved on the second driven wheel. The upper surface of the flat belt 614 forms a conveying surface. The motor drives the driving wheel to rotate, the rotation of the driving wheel drives the flat belt 614 to rotate, and the flat belt 614 drives the second driven wheel to rotate.

[0045] After the second motor starts, it drives the second drive wheel to rotate directly or through the transmission mechanism. The second drive wheel drives the flat belt 614 to rotate in a cycle through the friction between its wheel surface and the inner surface of the flat belt 614. The rotating flat belt 614 then drives the second driven wheel to rotate in turn by friction, thereby realizing the continuous and stable movement of the entire conveying surface.

[0046] Based on the above embodiments, in some embodiments, such as Figure 1 and Figure 3 As shown, the fixing mechanism 72 includes: a fixing plate 721, a movable plate 722, and a clamping plate 723; a portion of the fixing plate 721 is connected to the first driving member 73, a portion of the fixing plate 721 extends to the track 74, the movable plate 722 is slidably disposed on the fixing plate 721, the movable plate 722 is connected to the clamping plate 723, and a clamping space for fixing and clamping the material box 4 is formed between the movable plate 722 and the clamping plate 723.

[0047] Specifically, the fixed plate 721 serves as the basic carrier of the mechanism, undertaking the dual functions of connection and transmission. One end of it is rigidly connected to the first driving member 73 (such as belt 733) to receive power from the driving system; the other end is provided with a guide part 75 (such as connecting shaft and roller), which extends and is embedded in the cavity of the track 74, thereby constraining the entire fixed mechanism 72 to move on a predetermined path.

[0048] The movable plate 722 is slidably mounted on the fixed plate 721 via a linear sliding component. This sliding connection allows the movable plate 722 to move precisely in a straight line relative to the fixed plate 721 within a certain range. The movable plate 722 is fixedly connected to the clamping plate 723, and together they form a mechanism similar to a "gripper". Between the opposing inner surfaces of the movable plate 722 and the clamping plate 723, a clamping space with dimensions matching the material box 4 is formed.

[0049] Once the material box 4 is delivered to the predetermined position by the transport mechanism 6, the clamping space is reduced by controlling the movable plate 722 to slide relative to the fixed plate 721 towards the clamping plate 723 (this can be driven by a small actuator such as a cylinder, electromagnet, or cam, not shown in the figure), thereby firmly clamping and fixing the material box 4 from both sides. Subsequently, the first driving component 73 drives the entire fixing mechanism 72 to move, thus achieving the lifting and transfer of the material box 4. When it is necessary to release the material box 4, the movable plate 722 slides in the opposite direction, increasing the clamping space, thereby releasing the material box 4.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lifting assembly for a grain bulk density meter, characterized in that, The grain bulk density meter includes: a grain cylinder assembly, a capacity cylinder assembly, a weighing assembly, and a lifting assembly; the grain cylinder assembly includes: a grain cylinder and an intermediate cylinder; the capacity cylinder assembly includes: a capacity cylinder and a rotating mechanism; the rotating mechanism is adapted to drive the opening of the capacity cylinder to face the intermediate cylinder or the weighing assembly; the weighing assembly is used to mount a material box; The lifting assembly includes a support plate, a fixing mechanism, and a first driving member. A track is formed on the support plate, the bottom of the track has a first portion extending vertically, and the top of the track has a second portion extending horizontally. The first portion and the second portion are in communication. The fixing mechanism is used to connect the feed box. A portion of the fixing mechanism is connected to the first driving member, and a portion of the fixing mechanism extends to the track. The first driving member is configured to drive the fixing mechanism to move under the guidance of the track, guiding the feed box connected to the fixing mechanism to move vertically along the track and then horizontally, so as to pour the grain in the feed box into the grain container.

2. The lifting assembly for a grain bulk density meter according to claim 1, characterized in that, The fixing mechanism is provided with a guide part, which is slidably embedded in the track.

3. The lifting assembly for a grain bulk density meter according to claim 2, characterized in that, The guide portion includes: a connecting shaft and a roller; One end of the connecting shaft is connected to the fixing mechanism, and the other end is equipped with the roller; the roller is rotatably disposed within the track.

4. The lifting assembly for a grain bulk density meter according to claim 1, characterized in that, The first driving component includes: a first motor, a first driving pulley, a first driven pulley, and a belt; The first driving wheel is connected to the output shaft of the first motor; the first driven wheel is disposed on the support plate; the belt is tensioned between the first driving wheel and the first driven wheel, and the belt is connected to the fixing mechanism to drive the fixing mechanism to move.

5. The lifting assembly for a grain bulk density meter according to claim 1, characterized in that, The lifting components also include: a transport mechanism; The transport mechanism has a transport channel that connects to the weighing component for transporting the material box.

6. The lifting assembly for a grain bulk density meter according to claim 5, characterized in that, The weighing component has an overlap plate at its inlet and / or outlet for connection to the transport channel.

7. The lifting assembly for a grain bulk density meter according to claim 5, characterized in that, The transport mechanism includes: a plurality of flat belt conveyor structures connected end to end in sequence, wherein one of the flat belt conveyor structures is connected to the inlet of the weighing component, and another flat belt conveyor structure is connected to the outlet of the weighing component.

8. The lifting assembly for a grain bulk density meter according to claim 7, characterized in that, Each of the flat belt conveyor structures includes: a support frame, a flat belt, a second drive member, and a driven member; the support frame is arranged in a strip shape; the support frame has a channel through which the flat belt passes and forms a conveying surface above the support frame; one end of the flat belt is sleeved on the second drive member, and the other end of the flat belt is sleeved on the driven member; the second drive member and the driven member are detachably connected to both ends of the support frame, and the second drive member drives the flat belt to rotate.

9. The lifting assembly for a grain bulk density meter according to claim 8, characterized in that, The second driving component includes a second driving wheel and a second motor. The driven component includes a second driven wheel. The driving wheel and the second driven wheel are located at both ends of the transport channel. One end of the flat belt is sleeved on the second driving wheel, and the other end of the flat belt is sleeved on the second driven wheel. The upper surface of the flat belt forms the conveying surface. The motor drives the driving wheel to rotate, the rotation of the driving wheel drives the flat belt to rotate, and the flat belt drives the second driven wheel to rotate.

10. The lifting assembly for a grain bulk density meter according to any one of claims 1-9, characterized in that, The fixing mechanism includes: a fixing plate, a movable plate, and a clamping plate; A portion of the fixed plate is connected to the first driving member, and a portion of the fixed plate extends to the track. The movable plate is slidably disposed on the fixed plate and is connected to the clamping plate. A clamping space for fixing and clamping the material box is formed between the movable plate and the clamping plate.

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