plows with paddy field wheels

Abstract

This utility model discloses a water-field wheel for a tiller, including an axle, with multiple fixed discs spaced apart on the axle, and multiple blades installed between two adjacent fixed discs, the blades of the multiple fixed discs being staggered; a tillage blade assembly is fixedly installed between two adjacent fixed discs and on each fixed disc, the tillage blade assembly including connectors fixed to opposite sides of the axle and rotary tillage blades installed at the ends of the two connectors, the rotary tillage blades being placed between two adjacent blades, with their outer ends extending beyond the blades; the rotary tillage blades of two adjacent tillage blade assemblies are circumferentially staggered, and the outer ends of the rotary tillage blades near the input end of the axle are on the same circumferential surface.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, specifically to a water-field wheel for a tiller. Background Technology

[0002] A paddy field wheel is a common type of tillage machinery, installed at the front of a mini-tiller, used for tilling paddy fields. Existing paddy field wheels include an axle with multiple fixed discs spaced apart on it. Multiple blades are fixed between adjacent fixed discs, and each blade has multiple soil-breaking angles. The blades on the fixed discs are staggered. The aforementioned paddy field wheel rotates the axle via a drive mechanism, causing the blades to rotate and thus tilling the soil. However, paddy fields often contain a lot of rice straw, which can easily become entangled during tilling. To solve this problem, Chinese Patent Publication No. 210928508 discloses a disc-type paddy field wheel with blades for a mini-tiller, including an axle, fixed discs, and blades. Rotary tillage blades adjacent to the blades can also be detachably installed on the fixed discs. In addition to the blades, the fixed discs of this paddy field wheel also have rotary tillage blades, which can break the soil and remove weeds, and cut the rice straw to prevent the blades from becoming entangled. However, during the tilling process, the paddy field wheel is prone to sinking because the soil in the paddy field is relatively soft and the rotary blades and the blades are on the same circumference. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a paddy field wheel for a tiller, which solves the problem that existing paddy field wheels are prone to sinking during operation.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A tiller paddy field wheel includes an axle, with multiple fixed discs spaced apart on the axle. Multiple blades are installed between two adjacent fixed discs, and the blades between the fixed discs are staggered. A tillage blade assembly is fixedly installed between two adjacent fixed discs and on each fixed disc. The tillage blade assembly includes connectors fixed to opposite sides of the axle and rotary tillage blades installed at the ends of the two connectors. The rotary tillage blades are positioned between two adjacent blades, with their outer ends extending beyond the blades. The rotary tillage blades of two adjacent tillage blade assemblies are circumferentially staggered, and the outer ends of the rotary tillage blades near the input end of the axle are on the same circumferential surface. In this configuration, the rotary tillers in the tillage assembly are circumferentially offset and extend beyond the blades. When the axle rotates under the drive mechanism, it drives each tillage assembly and blade to rotate together. During rotation, because the rotary tillers in the tillage assembly are longer, they contact the silt in the paddy field sequentially with adjacent blades, achieving different depths of soil breaking and slurrying. Simultaneously, the blades are positioned along the length of the axle, with the rotary tillers extending beyond the blades, ensuring shallow soil breaking and preventing the blades from sinking during the breaking process, thus preventing overload and machine failure due to the paddy field wheel sinking. The rotary tillers, while breaking the soil deeply, also cut aquatic plants, preventing them from becoming entangled. In addition to being fixed to the fixed plate, the rotary tillage assemblies are directly fixed to the axle; a larger number of assemblies results in better soil breaking effect.

[0006] Furthermore, the two rotary tillers of the tiller assembly near the power input end of the axle have a shorter extension length than the other tiller assemblies. This arrangement effectively avoids other components near the paddy field wheel, providing sufficient installation space for mechanisms such as the drive mechanism.

[0007] Furthermore, the fixing disk has three sections, with the central section fitted onto the axle and welded to it. Four outwardly extending blade mounting portions are evenly arranged circumferentially on the left and right fixing disks, and eight outwardly extending blade overlapping portions are evenly arranged circumferentially on the central fixing disk. These blade overlapping portions correspond to the blade mounting portions on the left and right fixing disks in pairs. This welding and fixing of the fixing disk to the axle ensures a stable structure. The blade mounting portions and overlapping portions on the fixing disks can share the external force on the blades when they rotate and break the soil, increasing the blade strength. The number of blade overlapping portions in the central fixing disk is the sum of the number of blade mounting portions on the left and right fixing disks, thus enabling the fixing and installation of two sets of blades, and ensuring that each set of blades is evenly arranged circumferentially according to the arrangement of the blade mounting portions.

[0008] Furthermore, the blades are V-shaped, with their left and right ends welded and fixed to the blade mounting portion and the blade overlap portion, respectively. Multiple soil-breaking angles are spaced apart along the length of each blade. A positioning groove is provided at the root of each blade overlap portion and blade mounting portion to engage with the side end of the blade. This V-shape, with the middle section bending outwards, effectively increases the strength of each blade, enabling it to meet soil-breaking requirements. The soil-breaking angles effectively increase the blade's soil-breaking capacity. The positioning grooves on the fixing plate allow one side of the blade to be inserted into the positioning groove before welding and fixing, providing initial positioning before welding and fixing the blade to the blade mounting portion or blade overlap portion.

[0009] Furthermore, the tillage blade assembly includes a first tillage blade assembly, a second tillage blade assembly, a third tillage blade assembly, a fourth tillage blade assembly, and a fifth tillage blade assembly arranged sequentially. The first tillage blade assembly is located near the power input end of the wheel axle. The connecting parts of the first, third, and fifth tillage blade assemblies are all U-shaped, with their open sides welded and fixed to the corresponding fixed plates. The inner ends of each rotary tillage blade of the first, third, and fifth tillage blade assemblies are inserted into the insertion space formed by the connecting parts and the fixed plates, and are fixed together with the connecting parts and the fixed plates by fasteners. The connecting parts of the second and fourth tillage blade assemblies are rectangular tubes, and the inner ends of each rotary tillage blade of the second and fourth tillage blade assemblies are inserted into the connecting parts and are fixedly connected to the connecting parts by fasteners. In this configuration, the tiller assembly consists of five blades. Three of these blades have U-shaped connectors welded to the axle, with both sides tightly fitted to the mounting plate. This allows the inner end of the rotary tiller blade to be initially positioned between the connector and the mounting plate before being secured with fasteners to form a unified structure. This installation method facilitates the replacement and assembly of the rotary tiller blades. Furthermore, the fasteners effectively increase the stability and structural strength of the rotary tiller blade assembly. The other two blade assemblies, positioned between the mounting plates, have rectangular tubular connectors with a central insertion space for the rotary tiller blades. This allows for initial positioning of the blades during installation, and the fasteners secure the blades to the connectors, forming a stable and robust connection that effectively increases the stress on the inner end of the rotary tiller blades.

[0010] Furthermore, the included angles between the first and second tillage blade assembly, the second and third tillage blade assembly, the third and fourth tillage blade assembly, and the fourth and fifth tillage blade assembly are all 30-36°. This ensures that the included angles between adjacent tillage blade assemblies are balanced, and that the rotary tillage blades of each assembly experience sufficiently balanced forces, meeting the requirements for staggered installation and preventing interference with the blades.

[0011] Furthermore, the rotary tiller blades of each component are all bent to the same side, with the cutting edges on opposite sides of the bending direction, and the width of each blade gradually increases from the inside to the outside. This curved shape ensures that the contact surface between the blades and the soil in the paddy field is an arc-shaped cutting edge, minimizing reaction force and effectively ensuring a longer service life. The wider outer end of the blades allows for greater soil penetration depth; a wider outer end increases end strength. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the paddy field wheel structure in the embodiment;

[0013] Figure 2 for Figure 1 The left view;

[0014] Figure 3 This is a schematic diagram of the installation structure of the third tillage blade assembly and the fixing plate in the embodiment;

[0015] Figure 4 This is a schematic diagram of the installation structure of the fourth tillage blade assembly and the wheel axle in the embodiment;

[0016] Figure 5 This is a schematic diagram of the installation structure of the fifth tillage blade assembly, wheel axle, and fixed plate in the embodiment;

[0017] Figure 6 This is an enlarged side view of the connector of the fourth tillage blade assembly in the embodiment;

[0018] Figure 7 This is an enlarged schematic diagram of the installation structure of the connector and the fixing plate in the first tillage blade assembly in the embodiment. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0020] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] When tilling paddy fields, paddy field wheels are typically installed at the front of existing tillers. A power mechanism drives the wheels to rotate, and blades or rotary tillers then till the soil. Currently, these wheels are installed at the front of either walk-behind or seated mini-tillers. Walk-behind mini-tillers have less power, requiring the operator to support them and control steering, making operation more strenuous. Seated mini-tillers, on the other hand, have a larger operator who sits in a seat to operate the tiller, making operation more convenient and less strenuous. However, when paddy field wheels are installed on existing seated mini-tillers, the wheels often sink during tilling due to the difference in support between the silt in the paddy field and the surface soil. This causes the equipment to run unloaded and overloaded, potentially leading to malfunctions and requiring crane lifting.

[0022] like Figures 1-2As shown, this embodiment provides a water-field wheel for a tiller, including a wheel axle 1 (the wheel axle 1 has a regular hexagonal cross-section), multiple fixed discs 2 are installed at intervals on the wheel axle 1, and multiple blades 4 are installed between two adjacent fixed discs 2, with the blades 4 between each pair of adjacent fixed discs being staggered; a tillage blade assembly 3 is fixedly installed between two adjacent fixed discs 2 and on each fixed disc 2, the tillage blade assembly 3 including a connector 31 fixed to the opposite side of the wheel axle 1 and rotary tillage blades 32 installed at the ends of the two connectors 31, the rotary tillage blades 32 being placed between two adjacent blades 4, with their outer ends extending beyond the blades 4; the rotary tillage blades 32 of two adjacent tillage blade assemblies 3 are circumferentially staggered, and the outer ends of the rotary tillage blades 32 near the input end of the wheel axle 1 are on the same circumferential surface. In this way, the rotary tillers 32 in the tiller assembly 3 are circumferentially offset and extend beyond the blades 4. Therefore, when the axle 1 rotates under the drive mechanism, it drives each tiller assembly 3 and blade 4 to rotate together. During rotation, because the rotary tillers 32 in the tiller assembly 3 are longer, they contact the silt in the paddy field successively with the adjacent blades 4, achieving different depths of soil breaking and slurrying. Simultaneously, the blades 4 are arranged along the length of the axle 1, and the rotary tillers 32 of each rotary tiller assembly extend beyond the blades 4, thus the blades 4 break the soil at a shallow depth, making it less likely to sink during the breaking process and preventing the paddy field wheel from sinking and causing overload and shutdown. The rotary tillers 32, while breaking the soil deeply, can also cut aquatic plants, preventing them from becoming entangled. In addition to being fixed to the fixed plate 2, the rotary tiller assemblies are directly fixed to the axle 1. A larger number of these assemblies results in better soil breaking effect.

[0023] Furthermore, the extension length of the two rotary tillers 32 of the tiller assembly 3 near the power input end of the axle 1 is less than the extension length of the other tiller assemblies 3. In this way, the arrangement can effectively avoid other components next to the paddy field wheel and provide sufficient installation space for the drive mechanism and other mechanisms.

[0024] like Figure 1 , Figure 3 As shown, in this embodiment, there are three fixing disks 2, with the middle part fitted onto the wheel axle 1 and welded to it; four outwardly extending blade mounting portions 21 are evenly provided circumferentially on the left and right fixing disks 2, and eight outwardly extending blade overlapping portions 23 are evenly provided circumferentially on the middle fixing disk 2 (e.g., ...). Figure 3As shown in the diagram, the blade overlap portion 23 is respectively arranged in pairs with the blade mounting portions 21 on the left and right side fixing disks 2. In this way, the fixing disk 2 is welded and fixed to the wheel axle 1, resulting in a stable structure. The blade mounting portions 21 and blade overlap portions 23 on the fixing disk 2 can share the external force on the blade 4 when the blade 4 rotates and breaks through the soil, increasing the strength of the blade 4. The number of blade overlap portions 23 in the middle fixing disk 2 is the sum of the number of blade mounting portions 21 on the left and right fixing disks 2, thereby enabling the fixing and installation of two sets of blades 4, and ensuring that each set of blades 4 is evenly arranged circumferentially according to the arrangement of the blade mounting portions 21.

[0025] like Figures 3-5 As shown, the blade 4 is V-shaped, with its left and right ends welded and fixed to the blade mounting part 21 and the blade overlapping part 23, respectively. Multiple soil-breaking angles 41 are spaced apart along the length of each blade 4. A positioning groove 22 is provided at the root of each blade overlapping part 23 and the blade mounting part 21, which engages with the side end of the blade 4. Thus, the V-shape of the blade 4, with its outward bending at the center, effectively increases the strength of each blade 4, enabling it to meet soil-breaking requirements. The soil-breaking angles 41 effectively increase the soil-breaking capacity of the blade 4. The positioning groove 22 on the fixing plate 2 allows one side of the blade 4 to be inserted into the positioning groove 22 before welding and fixing, providing initial positioning of the blade 4 before welding and fixing it to the blade mounting part 21 or the blade overlapping part 23.

[0026] like Figures 3-7 As shown, the tillage blade assembly 3 includes a first tillage blade assembly, a second tillage blade assembly, a third tillage blade assembly, a fourth tillage blade assembly, and a fifth tillage blade assembly arranged sequentially. The first tillage blade assembly is located near the power input end of the wheel axle 1. The connecting parts 31 of the first, third, and fifth tillage blade assemblies are all U-shaped (e.g., ...). Figure 7As shown), the open side is welded and fixed to the corresponding fixed plate 2. The inner ends of the rotary tillers 32 of the first tiller assembly, the third tiller assembly, and the fifth tiller assembly are inserted into the insertion space 311 formed by the connector 31 and the fixed plate 2, and are fixed together with the connector 31 and the fixed plate 2 by fasteners. The connector 31 of the second tiller assembly and the fourth tiller assembly is rectangular tube in shape. The inner ends of the rotary tillers 32 of the second tiller assembly and the fourth tiller assembly are inserted into the connector 31 and are fixedly connected to the connector 31 by fasteners. Thus, the tiller assembly 3 has five blades. Three of them have U-shaped connectors 31, welded to the axle 1, with both sides tightly attached to the fixing plate 2. This allows the inner end of the rotary tiller blade 32 to be initially positioned between the connector 31 and the fixing plate 2, and then fixed with fasteners to form a whole. This installation method facilitates the replacement and assembly of the rotary tiller blade 32. At the same time, after the fixing plate 2, connectors 31, and rotary tiller blade 32 are fixed together with fasteners, the stability and structural strength of the rotary tiller blade 32 assembly are effectively increased. The other two tiller assemblies 3, located between the fixing plates 2, have rectangular tube-shaped connectors 31, which also form an insertion space 311 in the middle for inserting the rotary tiller blade 32. This allows for initial positioning of the rotary tiller blade 32 during installation, and after being connected with fasteners, it forms a whole with the connector 31. The connection structure is stable and effectively increases the stress on the inner end of the rotary tiller blade 32.

[0027] like Figure 6 As shown, in this embodiment, the connecting member 31 between the second and fourth tillage blade assemblies is formed by two U-shaped plates connected facing each other, with the middle part forming the insertion space 311 for the rotary tillage blade 32. In a specific implementation, a rectangular tube can be used directly as the connecting member 31, and the end of the rectangular tube can be welded and fixed to the wheel axle 1.

[0028] The included angles between the first and second tillage blade assembly, the second and third tillage blade assembly, the third and fourth tillage blade assembly, and the fourth and fifth tillage blade assembly are all 36°. This ensures that the included angles between adjacent tillage blade assemblies 3 are balanced, and that the rotary tillage blades 32 of each tillage blade assembly 3 experience sufficiently balanced forces, meeting the requirements for staggered installation and preventing interference with the blades 4.

[0029] Furthermore, the rotary tillage blades 32 of each rotary tillage component are all curved in a clockwise direction, with the cutting edge of the blade 32 located on the opposite side of the curvature (i.e., the rotary tillage blade 32 is on the counterclockwise side, consistent with the rotation direction of the paddy field wheel), and the width of each rotary tillage blade 32 gradually increases from the inside to the outside. Each rotary tillage blade 32 has a mounting hole at its inner end, and the connecting member 31 and the fixing plate 2 have corresponding through holes. When installing the rotary tillage blade 32, first insert the inner end of the rotary tillage blade 32 into the insertion space 311 of the connecting member 31, then use a fastening bolt to pass through the connecting member 31, the inner end of the rotary tillage blade 32, and the fixing plate 2, and finally, after threaded engagement with the fastening nut, the rotary tillage blade 32 is fixed to the connecting member 31. The curved shape of the rotary tillage blade 32 ensures that the contact surface with the soil in the paddy field is an arc-shaped cutting edge when breaking the soil, minimizing the reaction force on the rotary tillage blade 32 and effectively ensuring a long service life. The rotary tiller blade has a 32mm wide outer end, which allows for greater soil penetration. Making the outer end wider can increase the strength of the end.

[0030] 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 the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A paddy field wheel for a cultivator, comprising a wheel shaft, a plurality of fixed discs being installed on the wheel shaft at intervals, a plurality of blades being installed between two adjacent fixed discs, and the blades between the plurality of fixed discs being staggered; characterized in that, A tillage blade assembly is fixedly installed between two adjacent fixed discs and on each fixed disc. The tillage blade assembly includes a connector fixed to the opposite side of the wheel axle and a rotary tillage blade installed at the ends of the two connectors. The rotary tillage blade is placed between two adjacent blades and its outer end extends out of the blade. The rotary tillage blades of two adjacent tillage blade assemblies are circumferentially staggered, and the outer ends of the rotary tillage blades near the wheel axle input end are on the same circumferential surface.

2. The paddy field wheel for a cultivator according to claim 1, characterized by The two rotary tillers of the tiller assembly near the power input end of the wheel axle have a shorter extension length than the other tiller assemblies.

3. The paddy field wheel for a cultivator according to claim 1 or 2, characterized by The fixed disk is provided in three parts, with the middle part fitted onto the wheel axle and welded to the wheel axle for fixation; four outwardly extending blade mounting parts are evenly provided on the left and right fixed disks, and eight outwardly extending blade overlapping parts are evenly provided on the middle fixed disk, with the blade overlapping parts corresponding to the blade mounting parts of the left and right fixed disks respectively.

4. The paddy field wheel for a cultivator according to claim 3, characterized by The blade is V-shaped, with its left and right ends welded and fixed to the blade mounting part and the blade overlap part, respectively. Multiple soil-breaking angles are provided at intervals along the length of each blade. A positioning groove is provided at the root of each blade overlap part and blade mounting part to engage with the side end of the blade.

5. The paddy field wheel for a cultivator according to claim 3, characterized by The tillage blade assembly includes a first tillage blade assembly, a second tillage blade assembly, a third tillage blade assembly, a fourth tillage blade assembly, and a fifth tillage blade assembly arranged sequentially. The first tillage blade assembly is located near the power input end of the wheel axle. The connecting parts of the first, third, and fifth tillage blade assemblies are all U-shaped, with their open sides welded and fixed to the corresponding fixed plates. The inner ends of each rotary tillage blade of the first, third, and fifth tillage blade assemblies are inserted into the insertion space formed by the connecting parts and the fixed plates, and are fixed together with the connecting parts and the fixed plates by fasteners. The connecting parts of the second and fourth tillage blade assemblies are rectangular tubes, and the inner ends of each rotary tillage blade of the second and fourth tillage blade assemblies are inserted into the connecting parts and fixedly connected to the connecting parts by fasteners.

6. The paddy field wheel for a cultivator according to claim 5, characterized by The included angles between the first tillage blade assembly and the second tillage blade assembly, the second tillage blade assembly and the third tillage blade assembly, the third tillage blade assembly and the fourth tillage blade assembly, and the fourth tillage blade assembly and the fifth tillage blade assembly are all 30-36°.

7. The paddy field wheel for a cultivator according to claim 1 or 2 or 4 or 5 or 6, characterized by, The rotary tillage blades of each rotary tillage component are all bent to the same side, with the blade edges on opposite sides of the bending direction, and the width of each rotary tillage blade gradually increases from the inside to the outside.

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