Transmission device for zizania aquatica harvester

Abstract

The invention belongs to the technical field of zizania aquatica harvesting equipment, and particularly relates to a transmission device for a zizania aquatica harvester. The invention provides a transmission device for a zizania aquatica harvester. The transmission device aims at solving the problem that in the prior art, the tensioning degree of a transmission chain of the zizania aquatica harvester cannot be adjusted. A transmission device for a zizania aquatica harvester comprises a bottom frame and a harvesting assembly arranged on the bottom frame, and the harvesting assembly is installed on the bottom frame through a height adjusting assembly for adjusting the height of the harvesting assembly; through cooperation of the adjusting mechanism and the adjusting wheel, flexible adjustment of the tensioning degree of the transmission chain is achieved. No matter what height the harvesting assembly is located, the driving frame can drive the adjusting wheel to move up and down through the adjusting mechanism, and it is ensured that the transmission chain is always kept in a set tensioning state. By means of the design, the problems that the tensioning degree of a transmission chain of a traditional zizania aquatica harvester is fixed and cannot be adjusted according to actual requirements are effectively solved, and the transmission efficiency and stability are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wild rice stem harvesting equipment, and in particular relates to a transmission device used for a wild rice stem harvester. Background Art

[0002] Zizania latifolia, also known as Gaogua, Zizania suspensa, Zizania suspensa, and Gaosun, is a perennial herbaceous plant of the genus Zizania in the Poaceae family. It mostly grows in the Yangtze River and is suitable for growing in fresh water. People have found that some Zizania latifolia do not produce ears due to infection with smut fungus, and the plants have no signs of disease. The stems continue to swell and gradually form spindle-shaped fleshy stems, which are the Zizania latifolia we eat now.

[0003] In the prior art, the water chestnut is usually harvested manually. Although water chestnut harvesters have appeared on the market, their performance cannot meet most harvesting needs. Therefore, the prior art still harvests water chestnuts manually. The water chestnut harvester in the prior art usually includes an engine, and the engine transmits power to the water chestnut harvesting assembly through a chain transmission mechanism. When the water chestnut harvester in the prior art adjusts the height of the harvesting assembly, the transmission chain of the chain drive cannot automatically adapt to the position change of the harvesting assembly, resulting in different tension levels of the transmission chain when the harvesting assembly is at different heights, which easily leads to damage to the transmission chain. Summary of the invention

[0004] The invention provides a transmission device for a wild rice stem harvester, aiming to solve the problem in the prior art that the tension degree of a transmission chain of the wild rice stem harvester cannot be adjusted.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A transmission device for a wild rice harvester comprises a chassis and a harvesting assembly arranged on the chassis, wherein an engine is arranged on the chassis, the engine transmits power to the harvesting assembly through a chain transmission mechanism, and the harvesting assembly is installed on the chassis through a height adjustment assembly that adjusts the height of the harvesting assembly;

[0007] The chain transmission mechanism comprises a driving sprocket mounted on the chassis, a driven sprocket mounted on the harvesting assembly, and a transmission chain arranged on the driving sprocket and the driven sprocket, and the chain transmission mechanism also comprises an adjusting wheel for keeping the transmission chain in a set tension state;

[0008] The regulating wheel is mounted on the base frame through an regulating mechanism, and a driving frame for driving the regulating mechanism is provided on the harvesting assembly;

[0009] When the height adjustment component drives the harvesting component to move upward, the driving frame drives the adjustment mechanism to move the adjustment wheel upward, and keeps the transmission chain in a set tension state;

[0010] When the height adjustment component drives the harvesting component to move downward, the driving frame drives the adjustment mechanism to move the adjustment wheel downward, and keeps the transmission chain in a set tension state.

[0011] A further improved solution: the adjusting mechanism includes a base mounted on the base frame, a slide seat which moves up and down relative to the base is provided on the base, the adjusting wheel is installed on the slide seat, the adjusting mechanism also includes a nut seat rotatably connected to the base, a screw rod which cooperates with the nut seat is provided on the slide seat, a guide mechanism which prevents the slide seat from rotating relative to the base is also provided between the slide seat and the base, the driving frame drives the nut seat to rotate via a transmission assembly, and the nut seat drives the slide seat to move up and down via the screw rod.

[0012] Based on the above technical solution: Due to the cooperation between the nut seat and the screw rod, this spiral transmission mechanism can provide very precise height adjustment. By rotating the nut seat, the rise or fall of the slide can be finely controlled to achieve the required height adjustment. The existence of the guide mechanism ensures that the slide does not rotate relative to the base during the up and down movement, which greatly improves the stability of the adjustment process. At the same time, the guide mechanism also limits the lateral movement of the slide, so that it can only move up and down along the prescribed path. The spiral transmission mechanism of the nut seat and the screw rod can withstand a large axial force, so this adjustment mechanism has a high load-bearing capacity. This makes it suitable for application scenarios that need to carry heavier loads. By selecting screws of different lengths, the travel range of the slide can be easily adjusted to meet different height adjustment requirements. This makes the adjustment mechanism have a wide range of applications.

[0013] A further improved solution: the transmission assembly includes a rack mounted on the drive frame, the transmission mechanism also includes a main shaft rotatably connected to the base, one end of the main shaft is provided with a cylindrical gear meshing with the rack, the other end of the main shaft is provided with a driving bevel gear, and the nut seat is provided with a driven bevel gear meshing with the driving bevel gear.

[0014] Based on the above technical solution: the cylindrical gear at one end of the main shaft is tightly meshed with the rack mounted on the drive frame. This meshing method can ensure that the power is effectively transmitted from the drive frame to the main shaft, and due to the involute tooth profile design of the gear and rack, the meshing process is smooth and low in noise. The driving bevel gear at the other end of the main shaft is meshed with the driven bevel gear on the nut seat. The meshing angle and number of teeth of the bevel gear can be adjusted according to the actual transmission requirements to meet different transmission ratios and efficiency requirements. This design enables the power to be efficiently transmitted from the main shaft to the nut seat.

[0015] A further improved solution: the nut seat is rotatably connected to the base via a sleeve, the sleeve is fixed to the nut seat via a screw, a mounting column cooperating with the sleeve is provided on the base, and a rolling bearing is provided between the sleeve and the mounting column.

[0016] Based on the above technical solution: One of the main functions of rolling bearings is to reduce friction, thereby allowing smoother and easier rotation. In this mechanism, the nut seat needs to rotate relative to the base to drive the screw and slide seat to move up and down. The presence of rolling bearings significantly improves the flexibility of this rotation, making the operation smoother. Rolling bearings are usually made of high-hardness, wear-resistant materials such as steel or alloys. These materials can withstand high loads and frequent movements without being easily worn. Therefore, setting a rolling bearing between the nut seat and the base can significantly enhance the wear resistance of the entire mechanism and extend its service life.

[0017] A further improved solution: the rolling bearing is a thrust bearing, the outer ring of the thrust bearing is mounted on the sleeve, and the inner ring of the thrust bearing is mounted on the mounting column.

[0018] Based on the above technical solution: Thrust bearings are a type of bearing specially designed to bear axial loads. Since the nut seat needs to rotate relative to the base and drive the screw and the slide seat to move up and down, a large axial load will be generated. Thrust bearings can effectively bear this load and ensure the stable operation of the mechanism. The structure of the thrust bearing is relatively compact, which can reduce the overall size of the mechanism and save space.

[0019] A further improved solution: the guide mechanism includes a guide rod arranged on the slide seat, the base is provided with a guide hole that cooperates with the guide rod, there are a plurality of guide rods, and the guide rods are evenly arranged around the circumferential direction of the screw.

[0020] Based on the above technical solution: the cooperation of the guide rod and the guide hole can ensure the precise position of the slide relative to the base, and the guide rod is evenly arranged around the circumference of the screw, which can guide the stable movement of the slide in the circumferential direction and prevent deflection or shaking, thereby ensuring the stability and reliability of the equipment.

[0021] A further improved solution: the base is also provided with a mounting plate for mounting the main shaft, the mounting plates are at least two, the mounting plates and the base are both an integrated structure, the mounting plate is provided with an axial hole matching the main shaft, and a bearing is provided between the main shaft and the axial hole.

[0022] Based on the above technical solution: the mounting plate and the base adopt an integrated structure without additional connectors or fasteners. This design significantly improves the stability and overall strength of the structure and reduces the risk of failure caused by loose or damaged connectors. The bearings set between the main shaft and the shaft hole, such as rolling bearings or sliding bearings, can effectively withstand the radial and axial loads generated by the main shaft during operation, further enhancing the stability and load-bearing capacity of the structure.

[0023] A further improved solution: the driving frame includes a longitudinal rod installed on the harvesting component and a cross rod arranged on the longitudinal rod, the cross rod is fixedly connected to the lower end of the rack, and the cross-sectional shapes of the cross rod and the longitudinal rod are both polygonal.

[0024] Based on the above technical solution: the cross-section of the crossbar and the longitudinal bar are both polygonal, which is more resistant to torsion and bending deformation than circular cross-section. When subjected to external force, the polygonal structure can better disperse stress due to its more edges and angles, thereby improving the overall stability and load-bearing capacity. The longitudinal and crossbars are reasonably arranged and connected to form a solid frame structure. This structure can effectively resist forces and torques from all directions, ensuring that the drive frame will not deform or fail during operation.

[0025] A further improved solution: an oblique rod for improving the strength of the driving frame is arranged between the cross rod and the longitudinal rod, one end of the oblique rod is fixed to the longitudinal rod, and the other end of the oblique rod is fixed to the cross rod.

[0026] Based on the above technical solution: the addition of diagonal rods forms multiple triangular structures between the horizontal rods, longitudinal rods and diagonal rods. According to the triangle stability principle, the triangle is one of the most stable structures in geometric shapes and can effectively resist deformation under external forces. Therefore, the addition of diagonal rods significantly improves the overall structural strength of the drive frame. When the drive frame is subjected to external forces, the diagonal rods can disperse the stress to a wider area, thereby reducing the stress concentration on a single component. This stress dispersion effect helps to extend the service life of the drive frame and improve its ability to withstand extreme conditions.

[0027] A further improved solution: the height adjustment component includes a hydraulic cylinder and a piston rod arranged in the hydraulic cylinder, the hydraulic cylinder is fixed on the base frame, and the piston rod is fixed on the harvesting component.

[0028] Based on the above technical solution: by adjusting the volume of oil in the hydraulic cylinder, the extension or retraction length of the piston rod can be accurately controlled, thereby achieving fine adjustment of the height of the harvesting component. The fixed installation of the hydraulic cylinder and the close connection between the piston rod and the harvesting component ensure stability during the height adjustment process. Even in a complex and changeable working environment, a stable adjustment effect can be maintained.

[0029] The beneficial effects of the present invention are:

[0030] The present invention realizes flexible adjustment of the tension of the transmission chain through the cooperation of the adjustment mechanism and the adjustment wheel. No matter what height the harvesting component is at, the drive frame can drive the adjustment wheel to move up and down through the adjustment mechanism to ensure that the transmission chain always maintains the set tension state. This design effectively solves the problem that the tension of the transmission chain of the traditional wild rice harvester is fixed and cannot be adjusted according to actual needs, and improves the transmission efficiency and stability.

[0031] Since the invention can ensure that the transmission chain always maintains the set tension state, it effectively reduces the energy loss and friction wear in the transmission process, improves the transmission efficiency and operation stability. At the same time, the precise height adjustment function enables the harvesting component to contact and cut the crop more accurately, improving the harvesting quality and operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For users of ordinary technology in the field, other related drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 The present invention is a schematic diagram of a transmission device for a wild rice stem harvester.

[0034] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0035] Figure 3 The present invention is a schematic diagram of an adjusting mechanism in a transmission device used for a wild rice stem harvester.

[0036] Figure 4 The invention discloses a schematic diagram of the internal structure of an adjusting mechanism in a transmission device for a wild rice stem harvester.

[0037] Description of the numbers in the figure:

[0038] 1- chassis; 2- harvesting assembly; 3- transmission chain; 4- adjusting wheel; 5- base; 6- slide seat; 7- nut seat; 8- screw rod; 9- rack; 10- spindle; 11- cylindrical gear; 12- driving bevel gear; 13- driven bevel gear; 14- sleeve; 15- mounting column; 16- guide rod; 17- mounting plate; 18- longitudinal rod; 19- cross rod; 20- diagonal rod; 21- height adjustment assembly. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by users of the present invention without creative work belong to the protection scope of the present invention.

[0040] refer to Figures 1 to 4 , a transmission device for a wild rice harvester, comprising a chassis 1 and a harvesting assembly 2 arranged on the chassis 1, wherein an engine is arranged on the chassis 1, and the engine transmits power to the harvesting assembly 2 through a chain transmission mechanism, and the harvesting assembly 2 is installed on the chassis 1 through a height adjustment assembly 21 that adjusts the height of the harvesting assembly 2;

[0041] The chain transmission mechanism includes a driving sprocket mounted on the chassis 1, a driven sprocket mounted on the harvesting assembly 2, and a transmission chain 3 arranged on the driving sprocket and the driven sprocket, and the chain transmission mechanism also includes an adjusting wheel 4 for keeping the transmission chain 3 in a set tension state;

[0042] The adjusting wheel 4 is mounted on the base frame 1 through an adjusting mechanism, and a driving frame for driving the adjusting mechanism is provided on the harvesting assembly 2;

[0043] When the height adjustment component 21 drives the harvesting component 2 to move upward, the driving frame drives the adjustment mechanism to move the adjustment wheel 4 upward, and keeps the transmission chain 3 in a set tension state;

[0044] When the height adjustment component 21 drives the harvesting component 2 to move downward, the driving frame drives the adjustment mechanism to move the adjustment wheel 4 downward, and keeps the transmission chain 3 in a set tension state.

[0045] Wherein: the adjusting mechanism comprises a base 5 mounted on the base frame 1, a slide 6 which moves up and down relative to the base 5 is arranged on the base 5, the adjusting wheel 4 is mounted on the slide 6, the adjusting mechanism also comprises a nut seat 7 rotatably connected to the base 5, a screw 8 which cooperates with the nut seat 7 is arranged on the slide 6, a guide mechanism which prevents the slide 6 from rotating relative to the base 5 is also arranged between the slide 6 and the base 5, the driving frame drives the nut seat 7 to rotate through the transmission assembly, and the nut seat 7 drives the slide 6 to move up and down through the screw 8.

[0046] Specifically: the transmission assembly includes a rack 9 installed on the driving frame, and the transmission mechanism also includes a main shaft 10 rotatably connected to the base 5, one end of the main shaft 10 is provided with a cylindrical gear 11 meshing with the rack 9, the other end of the main shaft 10 is provided with a driving bevel gear 12, and the nut seat 7 is provided with a driven bevel gear 13 meshing with the driving bevel gear 12.

[0047] Wherein: the nut seat 7 is rotatably connected to the base 5 through a sleeve 14, the sleeve 14 is fixed to the nut seat 7 through a screw, the base 5 is provided with a mounting column 15 that cooperates with the sleeve 14, and a rolling bearing is provided between the sleeve 14 and the mounting column 15.

[0048] The rolling bearing is a thrust bearing, the outer ring of the thrust bearing is mounted on the sleeve 14 , and the inner ring of the thrust bearing is mounted on the mounting column 15 .

[0049] Specifically: the guide mechanism includes a guide rod 16 arranged on the slide seat 6 , and the base 5 is provided with a guide hole matched with the guide rod 16 . There are a plurality of guide rods 16 , and the guide rods 16 are evenly arranged around the circumferential direction of the screw rod 8 .

[0050] The cross-sectional shape of the guide rod 16 may be a polygon.

[0051] Among them: the base 5 is also provided with a mounting plate 17 for mounting the main shaft 10, the mounting plates 17 are at least two, the mounting plates 17 and the base 5 are both integrated structures, the mounting plate 17 is provided with an axial hole matching with the main shaft 10, and a bearing is provided between the main shaft 10 and the axial hole.

[0052] Wherein: the driving frame includes a longitudinal rod 18 installed on the harvesting component 2 and a cross rod 19 arranged on the longitudinal rod 18, the cross rod 19 is fixedly connected to the lower end of the rack 9, and the cross-sectional shapes of the cross rod 19 and the longitudinal rod 18 are both polygonal.

[0053] An oblique rod 20 for improving the strength of the driving frame is provided between the cross rod 19 and the longitudinal rod 18 . One end of the oblique rod 20 is fixed to the longitudinal rod 18 , and the other end of the oblique rod 20 is fixed to the cross rod 19 .

[0054] The diagonal rod 20 can be welded to the transverse rod 19 and the longitudinal rod 18 .

[0055] Specifically: the height adjustment component 21 includes a hydraulic cylinder and a piston rod arranged in the hydraulic cylinder, the hydraulic cylinder is fixed on the base frame 1, and the piston rod is fixed on the harvesting component 2.

[0056] The hydraulic cylinder is supplied with hydraulic oil from an oil tank arranged on the chassis 1 .

[0057] The working principle of this embodiment:

[0058] The engine transmits power to the harvesting assembly 2 through the chain transmission mechanism to drive it to work. When the height of the harvesting assembly 2 needs to be adjusted, the height adjustment assembly 21 will drive the harvesting assembly 2 to move up and down. At the same time, through the coordinated action of the driving frame and the adjustment mechanism, the adjustment wheel 4 will move up and down accordingly to keep the transmission chain 3 in a set tension state to ensure transmission efficiency and stability.

[0059] Specifically: when the height of the harvesting assembly 2 needs to be adjusted, the height adjustment assembly 21 starts working and drives the harvesting assembly 2 to move upward or downward. In this process, the drive frame will also move accordingly. As the height of the harvesting assembly 2 changes, the degree of slack of the transmission chain 3 will also change. In order to ensure that the transmission chain 3 always remains in the set tension state, the adjustment mechanism starts working. The drive frame drives the nut seat 7 to rotate through the transmission assembly. The rotation of the nut seat 7 is converted into the up and down movement of the slide seat 6 through the screw rod 8, thereby driving the adjustment wheel 4 to move up and down.

[0060] The movement of the adjusting wheel 4 changes the tension of the transmission chain 3, so that it always remains in the set tension state. During the up and down movement of the slide 6, the guide mechanism plays a key role in preventing the slide 6 from rotating relative to the base 5. The guide mechanism ensures that the slide 6 can only move up and down in a straight line, thereby ensuring the stability of the adjusting wheel 4 and the transmission chain 3.

[0061] The present invention is not limited to the above optional implementation modes. Under the premise of not conflicting with each other, the various schemes can be combined arbitrarily. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in their shapes or structures, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A transmission device for a wild rice stem harvester, characterized in that: It comprises a base frame and a harvesting assembly arranged on the base frame, wherein an engine is arranged on the base frame, the engine transmits power to the harvesting assembly through a chain transmission mechanism, and the harvesting assembly is installed on the base frame through a height adjustment assembly for adjusting the height of the harvesting assembly; The chain transmission mechanism comprises a driving sprocket mounted on the chassis, a driven sprocket mounted on the harvesting assembly, and a transmission chain arranged on the driving sprocket and the driven sprocket, and the chain transmission mechanism also comprises an adjusting wheel for keeping the transmission chain in a set tension state; The regulating wheel is mounted on the base frame through an regulating mechanism, and a driving frame for driving the regulating mechanism is provided on the harvesting assembly; When the height adjustment component drives the harvesting component to move upward, the driving frame drives the adjustment mechanism to move the adjustment wheel upward, and keeps the transmission chain in a set tension state; When the height adjustment component drives the harvesting component to move downward, the driving frame drives the adjustment mechanism to move the adjustment wheel downward, and keeps the transmission chain in a set tension state.

2. The transmission device for a wild rice stem harvester according to claim 1, characterized in that: The adjusting mechanism includes a base mounted on the base frame, a slide seat which moves up and down relative to the base is provided on the base, the adjusting wheel is installed on the slide seat, the adjusting mechanism also includes a nut seat rotatably connected to the base, a screw rod which cooperates with the nut seat is provided on the slide seat, a guide mechanism which prevents the slide seat from rotating relative to the base is also provided between the slide seat and the base, the driving frame drives the nut seat to rotate via a transmission assembly, and the nut seat drives the slide seat to move up and down via the screw rod.

3. The transmission device for a wild rice stem harvester according to claim 2, characterized in that: The transmission assembly includes a rack mounted on the driving frame, and the transmission mechanism also includes a main shaft rotatably connected to the base, one end of the main shaft is provided with a cylindrical gear meshing with the rack, the other end of the main shaft is provided with a driving bevel gear, and the nut seat is provided with a driven bevel gear meshing with the driving bevel gear.

4. The transmission device for a wild rice stem harvester according to claim 3, characterized in that: The nut seat is rotatably connected to the base via a sleeve, the sleeve is fixed to the nut seat via a screw, a mounting column cooperating with the sleeve is provided on the base, and a rolling bearing is provided between the sleeve and the mounting column.

5. The transmission device for a wild rice stem harvester according to claim 4, characterized in that: The rolling bearing is a thrust bearing, the outer ring of the thrust bearing is mounted on the sleeve, and the inner ring of the thrust bearing is mounted on the mounting column.

6. The transmission device for a wild rice stem harvester according to claim 2, characterized in that: The guide mechanism comprises a guide rod arranged on the slide seat, a guide hole matched with the guide rod is arranged on the base, there are a plurality of guide rods, and the guide rods are evenly arranged around the circumference of the screw rod.

7. The transmission device for a wild rice stem harvester according to claim 3, characterized in that: The base is also provided with a mounting plate for mounting the main shaft, and there are at least two mounting plates. The mounting plate and the base are both integrated structures, and the mounting plate is provided with an axial hole that cooperates with the main shaft, and a bearing is provided between the main shaft and the axial hole.

8. The transmission device for a wild rice stem harvester according to claim 3, characterized in that: The driving frame includes a longitudinal rod installed on the harvesting component and a cross rod arranged on the longitudinal rod, the cross rod is fixedly connected to the lower end of the rack, and the cross-section shapes of the cross rod and the longitudinal rod are both polygonal.

9. The transmission device for a wild rice stem harvester according to claim 8, characterized in that: An oblique rod for improving the strength of the driving frame is arranged between the cross rod and the longitudinal rod, one end of the oblique rod is fixed on the longitudinal rod, and the other end of the oblique rod is fixed on the cross rod.

10. The transmission device for a wild rice stem harvester according to claim 1, characterized in that: The height adjustment assembly comprises a hydraulic cylinder and a piston rod arranged in the hydraulic cylinder, the hydraulic cylinder is fixed on the base frame, and the piston rod is fixed on the harvesting assembly.

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