Rotary tines and rotary tine sets
Patent Information
- Application Number
- CN202522343167.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-05
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-11-05
AI Technical Summary
因左弯刀片及右弯刀片的刀头呈折弯状，在刀头对土壤进行切割粉碎时，则使得刀片受到土壤的反作用力，这个反作用力的分力方向与微耕机的行进方向垂直，同时，因微耕机的自重较轻，继而使得这个反作用力的分力会影响微耕机的直线行走能力，虽然，利用左弯刀片及右弯刀片的对称涉及安装，可自行抵消一部分分力，但是，因安装精确度及在刀组数为奇数时，则不是很容易实现分力的抵消，继而导致现有的微耕机在进行旋耕作业时，其驾驶难度较大需要人工干预行走方向；进一步地，一个旋耕刀只有一个左弯刀头或右弯刀头，使其在切割土壤受到的反作用力向前的分力较小，继而使得旋转刀片对微耕机施加的向前行走的推力较小且加上微耕机的自重较轻，继而使得微耕机的自行走能力较差；进一步地，现有的微耕机的旋耕刀的侧切刃的横向切割范围较小，微耕机在荒草较多的田地里进行长时间的旋耕作业时，则常发生较多杂草缠绕在旋耕刀组的转动驱动轴上的情况发生，缠绕的摘抄较多，则不便于顺利进行旋耕作业
[0010]The beneficial effects of this utility model are as follows: The structure of this utility model is relatively simple, facilitating processing and manufacturing. When the rotating left-hand and right-hand blades are used to cut and crush the soil, the lateral components of the reaction forces acting on the left-hand and right-hand blades are in opposite directions, thus largely canceling each other out. This mutual cancellation results in a smaller lateral force on the rotary tiller body, reducing its impact on the lateral movement of the tiller and allowing it to travel better along a straight line. The forward thrust of the reaction forces acting on both the left-hand and right-hand blades increases the forward thrust exerted by the rotating blades, improving the tiller's forward self-propelled capability. The auxiliary blades rotate synchronously with the rotary tiller blades, and their lower cutting edges increase the lateral cutting range of the rotary tiller, allowing for the cutting of more weeds and significantly reducing weed entanglement.
Smart Images
Figure CN224760629U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotary tiller technology, specifically to rotary tiller blades and rotary tiller blade assemblies. Background Technology
[0002] In some hilly areas, the terrain prevents large, efficient rotary tillers from entering the low-lying areas, forcing the use of smaller mini-tillers for shallow tillage. Similarly, in some plains areas, farmers often purchase a mini-tiller for shallow tillage to reduce costs. The rotary blades on existing mini-tillers typically consist of several left- and right-curved blades, which pulverize and till the soil through their high-speed rotation and synchronized movement. Because the blades of the left and right curved blades are bent, when the blades cut and pulverize the soil, they experience a reaction force from the soil. The component of this reaction force is perpendicular to the direction of the tiller's movement. Furthermore, due to the tiller's light weight, this component of the reaction force affects its straight-line movement. Although the symmetrical installation of the left and right curved blades can partially offset this force, achieving complete offsetting is not easy due to installation precision requirements and when the number of blades is odd. Consequently, existing tillers are relatively difficult to operate during rotary tillage operations and require manual operation. Interference with walking direction; furthermore, a rotary tiller blade has only one left- or right-curved head, resulting in a smaller forward component of the reaction force it experiences when cutting the soil. Consequently, the forward thrust exerted by the rotating blades on the tiller is smaller, and coupled with the tiller's light weight, this leads to poor self-propelled capability. Furthermore, the lateral cutting range of the side cutting edges of existing rotary tillers is small. When the tiller performs long-term rotary tillage operations in fields with abundant weeds, a large number of weeds often become entangled on the rotating drive shaft of the rotary tiller blade assembly. The large amount of entangled weeds makes it difficult to perform rotary tillage operations smoothly. Utility Model Content
[0003] The purpose of this invention is to provide a rotary tiller blade and a rotary tiller blade assembly. The rotary tiller blade has two opposing left-hand curved blades and a right-hand curved blade. When the left-hand curved blade and the right-hand curved blade simultaneously cut and crush the soil, the reaction force can be offset by lateral separation. At the same time, the forward component of the reaction force can be increased, thereby improving the linear self-propelled ability of the tiller. Furthermore, the synchronous rotary tillage operation using the left-hand curved blade and the right-hand curved blade can improve the soil turning and crushing effect. In addition, by setting auxiliary blades, the lateral cutting range of the rotary tiller blade can be increased, thereby greatly reducing the phenomenon of weed entanglement and facilitating the smooth operation of rotary tillage.
[0004] The technical solution adopted by this utility model to solve its technical problem is: a rotary tiller, including a rotary tiller body, a left curved blade head, and a right curved blade head. The left curved blade head and the right curved blade head are both arranged at the front of the rotary tiller body, and the right curved blade head is located above the left curved blade head. An auxiliary blade is arranged in the middle left area of the rotary tiller body, and the rear end of the rotary tiller body is a mounting connection part.
[0005] Preferably, the auxiliary blade has a plate-like structure and is distributed along the vertical width direction of the rotary tiller body.
[0006] Preferably, the width of the left curved cutter head in the vertical direction is greater than the width of the right curved cutter head in the vertical direction.
[0007] Furthermore, the mounting connection portion is provided with two mounting through holes and one elongated hole, the elongated hole being located behind the two mounting through holes.
[0008] Furthermore, a convex reinforcing rib is provided on the rotary tiller body, located on the front side of the mounting connection portion, and the convex reinforcing rib is distributed along the front-back direction.
[0009] A rotary tiller assembly includes the rotary tillers described above. The assembly also includes a mounting sleeve with a hexagonal cross-section. A mounting plate is fixedly installed at both ends and the middle of the mounting sleeve. Several through holes are provided around the perimeter of the mounting plate. Three rotary tillers are installed on each mounting plate, and these three blades are evenly spaced along the circumference of the mounting sleeve. The three rotary tillers located at the left end and the three rotary tillers located at the right end of the mounting sleeve have the same distribution angle. In a projection plane generated along the axial direction of the mounting sleeve, the rotary tillers located at the middle of the mounting sleeve are staggered with the rotary tillers located at the left or right end of the mounting sleeve.
[0010] The beneficial effects of this utility model are as follows: The structure of this utility model is relatively simple, facilitating processing and manufacturing. When the rotating left-hand and right-hand blades are used to cut and crush the soil, the lateral components of the reaction forces acting on the left-hand and right-hand blades are in opposite directions, thus largely canceling each other out. This mutual cancellation results in a smaller lateral force on the rotary tiller body, reducing its impact on the lateral movement of the tiller and allowing it to travel better along a straight line. The forward thrust of the reaction forces acting on both the left-hand and right-hand blades increases the forward thrust exerted by the rotating blades, improving the tiller's forward self-propelled capability. The auxiliary blades rotate synchronously with the rotary tiller blades, and their lower cutting edges increase the lateral cutting range of the rotary tiller, allowing for the cutting of more weeds and significantly reducing weed entanglement. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of 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 preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 A first-person view schematic diagram of the overall structure of a rotary tiller blade; Figure 2 A schematic diagram of the overall structure of a rotary tiller from a second-view perspective; Figure 3 This is a schematic diagram of the overall structure of a rotary tiller from a third-person perspective. Figure 4 This is a schematic diagram of the overall structure of the rotary tiller blade assembly; In the figure: 1 Rotary tiller blade body, 11 Mounting connection part, 111 elongated hole, 112 Mounting through hole, 12 convex reinforcing rib, 2 Left curved blade head, 3 Right curved blade head, 4 Auxiliary blade, 5 Mounting sleeve, 6 Mounting plate, 61 Through hole. Detailed Implementation
[0013] The following will describe specific embodiments and appendices. Figure 1-4 The technical solutions in the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some preferred embodiments of this utility model, and not all embodiments. Those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0014] This utility model provides a rotary tiller (such as...) Figure 1As shown, the rotary tiller includes a rotary tiller body 1, a left-curved blade 2, and a right-curved blade 3. The left-curved blade 2 and right-curved blade 3 are both located at the front of the rotary tiller body 1, with the right-curved blade 3 positioned above the left-curved blade 2. In actual manufacturing, the rotary tiller body 1, left-curved blade 2, and right-curved blade 3 can be a single, integrated component made of steel. A side-cutting blade is located at the bottom of the rotary tiller body 1, and a front-cutting blade is located at the bottom of the left-curved blade 2 and right-curved blade 3. The side-cutting and front-cutting blades improve the cutting effect of the rotary tiller on soil and weeds. During the rotation of the rotary tiller, when both the left-curved blade 2 and right-curved blade 3 cut and pulverize the soil, the lateral components of the reaction forces acting on the left-curved blade 2 and right-curved blade 3 are in opposite directions, thus largely canceling out the lateral forces. This mutual cancellation results in a smaller lateral force on the rotary tiller body 1, thereby improving its cutting efficiency. The design reduces the impact on the lateral movement of the rotary tiller, allowing it to move better along a straight line. The left and right curved blades 2 and 3 are simultaneously propelled by the forward component of the reaction force, resulting in a greater forward thrust exerted by the rotating blades, thus improving the tiller's forward self-propelled ability. The left and right curved blades 2 and 3 simultaneously cut and pulverize the soil, improving the pulverization effect. An auxiliary blade 4 is located in the middle left side of the rotary tiller body 1, with a cutting edge at its bottom. The auxiliary blade 4 rotates synchronously with the rotary tiller, increasing the lateral cutting range of the rotary tiller by utilizing its lower cutting edge, thereby cutting more weeds and significantly reducing weed entanglement. The rear end of the rotary tiller body 1 is a mounting connection part 11, which connects the rotary tiller to the corresponding mounting base during practical application.
[0015] Based on the above embodiments, the specific implementation method for fixing the auxiliary blade 4 to the rotary tiller body 1 is as follows: the auxiliary blade 4 has a plate-like structure and is distributed along the vertical width direction of the rotary tiller body 1. The auxiliary blade 4 is fixedly connected to the left side wall of the rotary tiller body 1 by welding.
[0016] Based on the above embodiments, a specific implementation of the left curved cutter head 2 and the right curved cutter head 3 is as follows: the width of the left curved cutter head 2 in the vertical direction is greater than the width of the right curved cutter head 3 in the vertical direction. Specifically, the width of the left curved cutter head 2 can be 10mm greater than the width of the right curved cutter head 3.
[0017] Based on the above embodiments, the specific implementation of the mounting connection part 11 is as follows: two mounting through holes 112 and one elongated hole 111 are provided on the mounting connection part 11. The elongated hole 111 is located behind the two mounting through holes 112. The distribution position of the elongated hole 111 and the two mounting through holes 112 on the mounting connection part 11 can be processed and manufactured according to the actual situation. The two mounting through holes 112 and one elongated hole 111 can improve the docking flexibility of the mounting connection part 11, thereby facilitating the docking of the rotary tiller blade with several different types of mounting plates.
[0018] In practical applications, the front side of the mounting connection part 11 is a region with greater stress. To improve the structural strength of the front side of the mounting connection part 11, a convex reinforcing rib 12 is provided on the rotary tiller body 1 located on the front side of the mounting connection part 11. The convex reinforcing rib 12 is distributed along the front-back direction. In actual processing, the convex reinforcing rib 12 can be processed directly at a designated position on the rotary tiller body 1 using a punch press.
[0019] This utility model provides a rotary tiller blade assembly, including the rotary tiller blades described above. The assembly also includes a mounting sleeve 5, which has a hexagonal cross-section and is fitted onto a hexagonal drive shaft. The rotation of the drive shaft drives the rotation of the mounting sleeve 5. A mounting plate 6 is fixedly installed at both ends and the middle of the mounting sleeve 5. The mounting plates 6 are welded to the mounting sleeve 5 and are distributed along the radial plane of the mounting sleeve 5. Several through holes 61 are provided around the mounting plates 6. The specific distribution and specifications of the through holes 61 can be customized according to actual conditions to ensure correspondence with the mounting connection part 11. The mounting through hole 112 or oblong hole 111 are fitted together; three rotary tillers are provided on each mounting plate 6, and in actual application, the mounting connection part 11 and the mounting plate 6 are fixedly connected by bolts; the three rotary tillers on each mounting plate 6 are evenly distributed along the circumference of the mounting sleeve 5; the three rotary tillers on the left end of the mounting sleeve 5 and the three rotary tillers on the right end of the mounting sleeve 5 have the same distribution angle, and in the projection plane generated along the axial direction of the mounting sleeve 5, the rotary tillers on the middle part of the mounting sleeve 5 and the rotary tillers on the left or right end of the mounting sleeve 5 are distributed in a staggered manner.
[0020] In this utility model, "left" and "right" are relative positions used for the convenience of describing positional relationships, and therefore cannot be understood as absolute positions as a limitation on the scope of protection.
[0021] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.
[0022] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. For those skilled in the art, several improvements and modifications can be made without departing from the concept of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.
Claims
1. A rotary tiller characterized by, The rotary tiller includes a rotary tiller body, a left-curved blade head, and a right-curved blade head. Both the left-curved blade head and the right-curved blade head are located at the front of the rotary tiller body, with the right-curved blade head positioned above the left-curved blade head. An auxiliary blade is located in the middle left side region of the rotary tiller body, and the rear end of the rotary tiller body is a mounting connection part.
2. The rotary blade of claim 1 wherein, The auxiliary blade has a plate-like structure and is distributed along the vertical width direction of the rotary tiller body.
3. The rotary blade of claim 1 wherein, The width of the left curved cutter head in the vertical direction is greater than the width of the right curved cutter head in the vertical direction.
4. A rotary blade according to claim 2 or 3, characterised in that, The mounting connection portion is provided with two mounting through holes and one elongated hole, the elongated hole being located behind the two mounting through holes.
5. The rotary blade of claim 4 wherein, A raised reinforcing rib is provided on the rotary tiller body, located on the front side of the mounting connection, and the raised reinforcing rib is distributed along the front-back direction.
6. A group of rotary blades, characterized in that, The rotary tiller assembly, including the rotary tiller blades according to claim 5, further includes a mounting sleeve with a hexagonal cross-section. A mounting plate is fixedly installed at both ends and the middle of the mounting sleeve. Several through holes are provided around the mounting plate. Three rotary tiller blades are installed on each mounting plate, and these three blades are evenly spaced along the circumference of the mounting sleeve. The three rotary tiller blades located at the left end and the three rotary tiller blades located at the right end of the mounting sleeve have the same distribution angle. In a projection plane generated along the axial direction of the mounting sleeve, the rotary tiller blade located in the middle of the mounting sleeve is staggered with the rotary tiller blades located at the left or right end of the mounting sleeve.