Double-barrel segmented spiral combined type grain leveling device

Abstract

The invention discloses a double-barrel segmented spiral combined type grain leveling device. The double-barrel segmented spiral combined type grain leveling device comprises a rack, the two spiral wheels are arranged in parallel at an interval and are arranged on the lower side of the rack; each spiral wheel comprises a sleeve, a hollow hollow shaft, a hollow motor, a bearing and a bearing end cover; the two ends of the hollow hollow shaft are fixedly connected to the lower side of the rack through supporting pieces 1 correspondingly. The sleeve is coaxially and rotatably mounted on the hollow hollow shaft through a bearing; the bearing end cover is fixedly connected to the end part of the sleeve; a motor fixing plate is fixedly connected to the hollow hollow shaft in the sleeve; a motor fixing sleeve is fixedly connected to the motor fixing plate; the hollow motor sleeves the hollow hollow shaft, and the fixed end of the hollow motor is fixedly connected with the motor fixing sleeve; the rotating end of the hollow motor is fixedly connected with the sleeve through a connecting plate. Through structural innovation, the technical problems that a traditional grain leveling device is insufficient in advancing stability and limited in spiral wheel loading capacity are solved, and the grain leveling operation efficiency and the equipment reliability can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of grain leveling devices, in particular to a double-drum segmented spiral combined grain leveling device. Background Art

[0002] Keeping grain surfaces level is crucial for ensuring safe grain storage. Unleveled grain piles can easily form pyramidal structures, leading to poor ventilation and heat accumulation, potentially causing localized mold and insect infestation. Irregular grain surfaces also complicate the deployment of grain monitoring equipment and increase data bias. When abnormal conditions such as grain heating occur, deep grain piles must be turned. Traditional manual operations are inefficient, labor-intensive, and pose safety risks in dusty environments. Therefore, the use of automated silo robots is becoming increasingly urgent. Most existing granary robots use a single chassis structure, which is prone to tipping over or sinking on soft grain surfaces. In particular, the stability of the entire machine is significantly reduced during grain leveling operations with unilateral load changes. Its drive mechanism generally uses a single spiral wheel design driven by a solid shaft motor. This has defects such as large moment of inertia and weak support structure. As a result, the spiral wheel is easily deformed under high loads, limiting the operating speed and leveling accuracy. In addition, the traditional fixed-angle rigid scraper grain leveling device is difficult to dynamically adjust the operating mode according to the state of the grain surface, and is prone to jamming when switching working states, which cannot meet the leveling needs of complex grain surfaces in large granaries. Therefore, the development of a new type of granary robot with both high stability and strong load capacity has become a technical problem that needs to be solved urgently. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a double-drum segmented spiral combined grain leveling device.

[0004] To achieve the above-mentioned purpose, the technical solution of the double-drum segmented spiral combined grain leveling device of the present invention is as follows: A double-drum segmented spiral combined grain leveling device, comprising: frame; Two parallel and spaced spiral wheels are provided on the lower side of the frame; each spiral wheel includes a sleeve, a hollow shaft, a hollow motor, a bearing and a bearing end cover; the two ends of the hollow shaft are fixedly connected to the lower side of the frame through a support member 1; the sleeve is coaxially rotatably mounted on the hollow shaft through the bearing; the bearing end cover is fixedly connected to the end of the sleeve and is sleeved on the hollow shaft for sealing the bearing; a motor fixing plate is fixedly connected to the hollow shaft located inside the sleeve; a motor fixing sleeve is fixedly connected to the motor fixing plate; the hollow motor is sleeved on the hollow shaft, and its fixed end is fixedly connected to the motor fixing sleeve; the rotating end of the hollow motor is fixedly connected to the sleeve through a connecting plate; a spiral wire is fixedly connected to the outer wall of the sleeve; the spiral wires on the outer walls of the two sleeves rotate in opposite directions; The flat grain plate is arranged on the frame and located at the rear side of the spiral wheel, and the length extension direction of the flat grain plate is perpendicular to the axial direction of the spiral wheel; A driving motor is arranged on the frame; Connecting rod mechanism, the driving motor is connected to the flat grain plate through the connecting rod mechanism.

[0005] Furthermore, the spiral wheel includes a conical end cover, which is fixedly connected to the end of the sleeve, the bearing is fixedly connected to the inner wall of the center hole of the conical end cover, the bearing end cover is fixedly connected to the end of the conical end cover, the end of the hollow shaft is provided with a step portion, the bearing is stopped by the step portion, the inner wall surface of the bearing is provided with an oil sealing baffle, the outer wall surface of the oil sealing baffle is sealed and fixed to the inside of the center hole of the conical end cover, and the inner wall surface is sealed and fixed to the step portion.

[0006] Furthermore, the sleeve is formed by splicing three cylinders, and the two cylinders are bolted together through the through holes of the radially extending lower edge plates. Each cylinder includes two semi-cylinders, and the two semi-cylinders are clamped and fixed and then fixed together by bolts.

[0007] Furthermore, a plurality of supporting ribs are provided on the inner wall of the cylinder, the connecting plate is fixedly connected to the supporting ribs, and the gaps in the lower edge plates extending radially below the cylinder on the same circumference can lock and fix the axial ribs of the supporting ribs.

[0008] Furthermore, the hollow shaft and the support member 1 are used to position the installation position of the support member 1 through the shaft shoulder, and the two sides of the support member 1 are bolted to the through holes on the two side planes of the end of the hollow shaft for circumferential positioning and fixing of the support member 1. A ventilation grid for dissipating heat from the motor is installed on the outside of the hollow part of the support member 1.

[0009] Furthermore, two groove-shaped channels are provided on the lower side of the frame, and two spiral wheels are correspondingly arranged in the two channels. Holes for inserting the support member 1 are provided in the channels, and the top of the support member 1 is provided with a connecting portion extending outward, which is fixedly connected to the frame by bolts.

[0010] Furthermore, an electrical control box is provided on the top of the frame, and batteries and control components are provided in the electrical control box. The batteries are installed at the bottom of the electrical control box and fixed by battery fixing parts. The box opening of the electrical control box is sealed and fixedly connected with a sealing plate, and a ventilation mesh cover is provided on the outer wall of the electrical control box.

[0011] Furthermore, the connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod. One end of the first connecting rod is fixedly connected to the output shaft of the driving motor through a connecting shaft and a coupling, and the other end is hinged to one end of the second connecting rod. The other end of the second connecting rod is hinged to the third connecting rod. The other end of the third connecting rod is hinged to the outer wall of the frame, and the flat grain plate is fixedly connected to the third connecting rod.

[0012] The present invention provides a double-drum segmented spiral combined grain leveling device, which has the following advantages compared with the prior art: The present invention's dual-tube segmented spiral combined grain leveling device features an integrated drive design with a hollow motor built into the spiral wheel, significantly reducing its overall size and improving its integrity and systemic integrity. The spiral wheel utilizes internal support ribs optimized through finite element analysis for support and connection, enhancing its strength. Combined with the hollow motor, this device achieves a lightweight design with high rigidity and low load characteristics. All components are removable for easy maintenance and replacement, extending its service life. The design carefully considered ease of disassembly and wear of key components. To ensure grain safety, the bearings utilize a sealed structure to prevent lubricant leakage, and the grain leveling plate connections utilize self-lubricating bearings, both of which ensure that the grain is protected from oil contamination. Regarding operational performance, the streamlined frame effectively reduces friction and pressure resistance against the grain surface during operation. The dual-channel design promotes unidirectional grain flow, preventing center accumulation, ensuring effective grain leveling, smooth operation, and enhanced rollover resistance. The grain leveling plate structure itself provides high grain leveling efficiency, and its positional flexibility, achieved through a linkage mechanism, further enhances the device's adaptability to complex grain surface environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the double-drum segmented spiral combined grain leveling device of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the double-drum segmented spiral combined grain leveling device of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the double-drum segmented spiral combined grain leveling device of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the internal structure of the spiral wheel in the double-drum segmented spiral combined grain leveling device of the present invention; Figure 5 It is a schematic structural diagram of the cylinder in the double-cylinder segmented spiral combined grain leveling device of the present invention; Figure 6 This is a working state diagram of the grain leveling plate in the double-drum segmented spiral combined grain leveling device of the present invention; Figure 7 This is a diagram of the stowed grain plate in the double-tube segmented spiral combined grain leveling device of the present invention. Numbers in the figure: 1. Support member 1; 2. Bearing; 3. Oil sealing baffle; 4. Bearing end cover; 5. Conical end cover; 6. Sleeve; 7. Support rib; 8. Spiral line; 9. Connecting plate; 10. Hollow motor; 11. Motor fixing plate; 12. Hollow core shaft; 13. Wire hole; 14. Motor fixing sleeve; 15. Frame; 16. Electric control box; 17. Battery; 18. Battery fixing part; 19. Ventilation mesh cover; 20. Semi-cylinder; 21. Lower edge plate; 22. Drive motor; 23. First connecting rod; 24. Second connecting rod; 25. Third connecting rod; 26. Flat grain plate. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: The specific embodiment of the double-drum segmented spiral combined grain leveling device of the present invention is as follows Figures 1 to 7 As shown, the machine comprises a frame 15, the bottom of the frame 15 is provided with double channels, a spiral wheel is installed in each channel, and a grain leveling mechanism is installed at the rear end of the frame 15.

[0015] The core of each spiral wheel is a hollow core shaft 12, whose two ends are fixed to the lower side of the frame 15 through support members 1. A motor fixing plate 11 is welded and fixed to the hollow core shaft 12. The fixed end of the hollow motor 10 is at the left end of the hollow core shaft 12, and the fixed end is connected to the motor fixing sleeve 14 by screws. The motor solid sleeve 6 is connected and fixed to the motor fixing plate 11 by bolts, thereby fixing the hollow motor 10 to the motor fixing plate 11 with the help of the motor fixing sleeve 14. The connection line of the hollow motor 10 passes through the through hole in the motor fixing plate 11 and passes through the hollow position of the hollow core shaft 12 through the wire hole 13. The wire hole 13 is close to the right end to reduce the difficulty of threading. The motor wire will pass through the hollow part of the right support member 1 and the hollow core shaft 12, and then pass through the hole inside the square cavity above the catamaran hull to connect to the battery 17 and the control component. The output end of the motor is connected to the connecting plate 9 by screws, and the connecting plate 9 is positioned and connected by the grooves and bolts on the supporting ribs 7, so that the spiral wheel is driven to rotate by the motor.

[0016] The rotating body of the spiral wheel consists of a connecting plate 9, support ribs 7, a sleeve 6, a spiral 8, a conical end cap 5, a bearing end cap 4, and a bearing 2. The right end of the bearing 2 contacts the oil-sealing baffle 3, which contacts the shoulder of the hollow central shaft 12. The shoulder serves to position and secure the oil-sealing baffle 3, which in turn serves to axially position and secure the bearing 2. The left end of the bearing 2 contacts the bearing end cap 4. The bearing end cap 4 is positioned and fixed to the oil-sealing baffle 3 via the end cap beak to determine the installation position. It is then bolted to the conical end cap 5, thereby achieving axial fixation of the bearing 2. The conical end cap 5 is fixed to the sleeve via two radial bolts, radially clamping the bearing 2. As the spiral wheel rotates, the central shaft does not rotate, while the outer ring of the bearing 2 rotates. The axial direction of the conical end cap 5 is connected to the through hole of the lower edge plate 21 of the sleeve 6 by its axial bolt, connecting it to the through hole of the support rib 7, thereby connecting them into one body and rotating together. The sleeve 6 is made up of three cylinders, and the adjacent cylinders are connected by bolts through the through holes of the radially extending lower edge plate 21. Each cylinder is fixed by two semi-cylinders 20 and then bolted. The inner wall of the sleeve 6 is fixedly connected with a plurality of axial support ribs 7; axially, the two sleeves 6 are bolted together through the through holes of their radially extending lower edge plates 21. At the same time, the gaps in the lower radially extending lower edge plates 21 on the same circumference can block the axial ribs of the support ribs 7, so that they can jointly play the role of driving the spiral wheel to rotate during rotation. Radially, the two upper and lower semi-cylinders 20 are bolted together through the through holes of the circumferential extension plates that they can fit into. There are three types of spirals 8, a total of twelve. Since the sleeve 6 itself is relatively thin, the spirals 8 pass through the through holes in the bottom plate and the through holes in the same position on the sleeve 6, and are bolted together with the through holes in the same position on the support ribs 7.

[0017] The hollow shaft 12 and the support member 1 are positioned at the installation position of the support member 1 through the shaft shoulder, and the two sides of the support member 1 are connected by bolts to the through holes on the two side planes milled on the end of the hollow shaft 12 to position and fix the support member 1 circumferentially. A ventilation grid is installed on the outside of the hollow part of the support member 1 to facilitate heat dissipation of the motor and prevent grain from entering the inside of the spiral wheel. The bottom of the frame 15 has a hole for connecting the threaded hole below which the corresponding support member 1 is inserted. The support member 1 can be inserted and fixed to the frame 15 by bolts. The support member 1 is a square structure with a support plate on the upper part. There are two threaded holes on the top plane. The threaded hole at the extended flat plate position can be used to screw a nut, and the other is fastened by thread.

[0018] An electrical control box 16 is fixed to the top of the frame 15. Batteries 17 are mounted on the bottom of the box via battery mounts 18. These mounts are capped with a thin plate bolted to the four corners of the cavity to prevent food from entering. The opening of the box 16 is sealed and fixed to a sealing plate. A ventilation mesh 19 is installed on the outer wall of the hollow area of ​​the support member 1 to dissipate heat from the motor.

[0019] The grain leveling mechanism includes a drive motor 22, a connecting rod mechanism, and a grain leveling plate 26. The grain leveling plate 26 is mounted on the frame 15 and located behind the spiral wheel. The length of the grain leveling plate 26 extends perpendicular to the axial direction of the spiral wheel. The drive motor 22 is connected to the grain leveling plate 26 via the connecting rod mechanism. The connecting rod mechanism includes a first connecting rod 23, a second connecting rod 24, and a third connecting rod 25. One end of the first connecting rod 23 is fixedly connected to the output shaft of the drive motor 22 via a connecting shaft and a coupling, and the other end is hinged to one end of the second connecting rod 24. The other end of the second connecting rod 24 is hinged to the third connecting rod 25. The other end of the third connecting rod 25 is hinged to the outer wall of the frame 15. The grain leveling plate 26 is fixedly connected to the third connecting rod 25. The lengths of the individual rods in the connecting rod mechanism and the positions and distances on the frame 15 are carefully designed, utilizing the dead center principle of the connecting rod mechanism. The drive motor 22 drives the connecting rod mechanism, ensuring that the grain leveling plate 26 is in the dead center position during operation. At this point, the grain leveling plate 26 is perpendicular to the ground, achieving high grain leveling efficiency. When climbing is required, the grain leveling plate 26 can be retracted to reduce climbing resistance. The shape of the grain leveling plate 26 is designed based on the appearance, size, and proportions of the agricultural implement rake to meet the needs of grain leveling.

[0020] The top rear end of the frame 15 has a motor fixing place for fixing the drive motor 22. The drive motor 22 is fixed to the fixing plate of the motor fixing place by screws to fix and position the motor. The motor control and power lines are routed through the through holes at the tail of the cavity to the inside of the electric control box 16 to connect to the battery 17 and the control components.

[0021] When the double-drum segmented spiral combined grain leveling device of the present invention is used, the hollow motors 10 of the two spiral wheels are first controlled by the electric control box 16 to start synchronously, and the rotating end of the motor drives the sleeve 6 to rotate around the fixed hollow central shaft 12 through the connecting plate 9. Since the spiral lines 8 welded on the outer wall of the sleeve 6 have opposite rotation directions, the reverse rotation of the two drums produces a centripetal gathering effect: the left-handed spiral line 8 pushes the grain on the right side to flow axially to the left, and the right-handed spiral line 8 pushes the grain on the left side to flow axially to the right, so that the accumulated grain can quickly diffuse laterally within the width of the device and be evenly transported backward along the axial direction. In this process, the support ribs 7 on the inner wall of the sleeve 6 efficiently transfer the torque from the connecting plate 9 to the spiral line 8, and the sleeve 6 structure with three sections of the cylinder 20 spliced ​​together significantly enhances the torsional rigidity and avoids deformation of the long axis. When grain is pushed to the rear of the spiral wheel, the drive motor 22 drives the linkage mechanism through a coupling: the first link 23 rotates with the output shaft of the drive motor 22, pushing the second link 24 to swing, which in turn drives the third link 25 in a fan-shaped reciprocating motion centered at the hinge point of the frame 15. A grain leveling plate 26, fixed to the third link 25, swings accordingly, its surface perpendicular to the spiral wheel axis. Its lower edge presses into the grain layer, scraping the raised portion backward. When it returns to its original position, it lifts off the grain surface to reduce resistance. The electromechanical system coordinates through sequential control. The spiral wheel starts first, completing grain leveling and rearward delivery. The grain leveling plate 26 then intervenes with a delayed delay to perform the scraping operation, forming a "push-scrape" cycle. The bearing 2 in the center hole of the conical end cap, the end bearing cap 4, and the oil-sealing baffle 3 on the inner wall of the bearing 2, sealed against the stepped portion of the hollow shaft 12, form a triple barrier to grain dust and keep the bearing 2 cavity clean. The ventilation grid on the outside of the support member 1 and the ventilation screen of the electrical control box 16 provide convection heat dissipation, preventing overheating of the hollow motor 10. Ultimately, the material leveling capability of the reverse spiral and the arc-shaped swinging trajectory of the grain leveling plate 26 work together to achieve the goal of low error in grain pile surface flatness at low energy consumption.

[0022] The double-barrel segmented spiral combined grain leveling device of the present invention has an integrated drive design in which the hollow motor 10 is built inside the spiral wheel, which significantly reduces the overall volume and improves the integrity and systematicness of the device; the spiral wheel is supported and connected by support ribs 7 optimized by finite element analysis, which enhances the strength of the spiral wheel. Combined with the hollow motor 10, a lightweight design and high rigidity and light load characteristics are achieved. All parts are detachable, which is convenient for maintenance and replacement to extend the service life. The design fully considers the convenience of disassembly and the wear of key parts. In order to ensure food safety, the bearing 2 part adopts a sealing structure to prevent lubricating oil leakage, and a self-lubricating bearing 2 is used at the connection of the grain leveling plate 26. Both ensure that there will be no oil pollution to the grain. In terms of operating performance, the streamlined frame 15 effectively reduces the friction and pressure resistance with the grain surface during movement. The dual-channel (spiral wheel) design promotes one-way flow of grain to prevent accumulation in the middle, thereby ensuring the grain leveling effect and driving smoothness, and enhancing anti-rollover stability; the grain leveling plate 26 structure itself has a high-efficiency grain leveling effect, and its position mobility achieved through the connecting rod mechanism further significantly enhances the device's adaptability to complex grain surface environments.

[0023] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A double-drum segmented spiral combined grain leveling device, characterized by: include: frame; Two parallel and spaced spiral wheels are provided on the lower side of the frame; each spiral wheel includes a sleeve, a hollow shaft, a hollow motor, a bearing and a bearing end cover; the two ends of the hollow shaft are fixedly connected to the lower side of the frame through a support member 1; the sleeve is coaxially rotatably mounted on the hollow shaft through the bearing; the bearing end cover is fixedly connected to the end of the sleeve and is sleeved on the hollow shaft for sealing the bearing; a motor fixing plate is fixedly connected to the hollow shaft located inside the sleeve; a motor fixing sleeve is fixedly connected to the motor fixing plate; the hollow motor is sleeved on the hollow shaft, and its fixed end is fixedly connected to the motor fixing sleeve; the rotating end of the hollow motor is fixedly connected to the sleeve through a connecting plate; a spiral wire is fixedly connected to the outer wall of the sleeve; the spiral wires on the outer walls of the two sleeves rotate in opposite directions; The flat grain plate is arranged on the frame and located at the rear side of the spiral wheel, and the length extension direction of the flat grain plate is perpendicular to the axial direction of the spiral wheel; A driving motor is arranged on the frame; Connecting rod mechanism, the driving motor is connected to the flat grain plate through the connecting rod mechanism.

2. A double-drum segmented spiral combined grain leveling device according to claim 1, characterized in that: The spiral wheel includes a conical end cover, which is fixedly connected to the end of the sleeve, the bearing is fixedly connected to the inner wall of the center hole of the conical end cover, the bearing end cover is fixedly connected to the end of the conical end cover, the end of the hollow shaft is provided with a step portion, the bearing is stopped by the step portion, the inner wall surface of the bearing is provided with an oil sealing baffle, the outer wall surface of the oil sealing baffle is sealed and fixed to the inside of the center hole of the conical end cover, and the inner wall surface is sealed and fixed to the step portion.

3. A double-drum segmented spiral combined grain leveling device according to claim 1, characterized in that: The sleeve is composed of three cylinders, and the two cylinders are bolted together through the through holes of the radially extending lower edge plates. Each cylinder includes two semi-cylinders, and the two semi-cylinders are clamped and fixed and then fixed together by bolts.

4. A double-drum segmented spiral combined grain leveling device according to claim 3, characterized in that: A plurality of supporting ribs are provided on the inner wall of the cylinder, the connecting plate is fixedly connected to the supporting ribs, and the gaps of the lower edge plates extending radially below the cylinder on the same circumference can lock and fix the axial ribs of the supporting ribs.

5. A double-drum segmented spiral combined grain leveling device according to claim 1, characterized in that: The hollow shaft and the support member 1 are positioned at the installation position of the support member 1 through the shaft shoulder, and the two sides of the support member 1 are bolted to the through holes on the two side planes of the end of the hollow shaft for circumferential positioning and fixing of the support member 1. A ventilation grid for heat dissipation of the motor is installed on the outside of the hollow part of the support member 1.

6. A double-drum segmented spiral combined grain leveling device according to claim 1, characterized in that: Two groove-shaped channels are provided on the lower side of the frame, and two spiral wheels are correspondingly arranged in the two channels. Holes for inserting the support member 1 are provided in the channels. The top of the support member 1 is provided with a connecting portion extending outward, and the connecting portion is fixedly connected to the frame by bolts.

7. A double-drum segmented spiral combined grain leveling device according to claim 1, characterized in that: An electrical control box is provided on the top of the frame, which contains batteries and control components. The batteries are installed at the bottom of the electrical control box and fixed by battery fixings. The box opening of the electrical control box is sealed and fixed with a sealing plate, and a ventilation mesh cover is provided on the outer wall of the electrical control box.

8. A double-drum segmented spiral combined grain leveling device according to claim 1, characterized in that: The connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod. One end of the first connecting rod is fixedly connected to the output shaft of the driving motor through a connecting shaft and a coupling, and the other end is hinged to one end of the second connecting rod. The other end of the second connecting rod is hinged to the third connecting rod. The other end of the third connecting rod is hinged to the outer wall of the frame, and the flat grain plate is fixedly connected to the third connecting rod.

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