Rotary blade fixed by double holes

Abstract

The rotary blade comprises a blade body and a blade handle which are integrally formed, the blade body and the blade handle are in an L shape, the blade body comprises a blade back portion and a blade portion, the blade portion is arranged on the side away from the blade handle, an installation groove is formed in the blade handle, and a first installation hole and a second installation hole are formed in the two sides of the installation groove. The first mounting hole is located at the end, close to the cutting edge part, of the cutter handle, the second mounting hole is located at the end, away from the cutting edge part, of the cutter handle, and the included angle between the circle center connecting line of the first mounting hole and the second mounting hole and the horizontal line in the length direction of the cutter handle is an acute angle. And the vertical distance from the circle center of the first mounting hole to the cutter body is smaller than that from the circle center of the second mounting hole to the cutter body. According to the rotary blade, the blade body and the blade handle are L-shaped, the first mounting hole and the second mounting hole are formed in the blade handle, and the included angle between the connecting line of the circle centers of the two mounting holes and the blade body is nearly 90 degrees, so that the rotary blade is more stable to mount and is not easy to loosen in the operation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary tiller technical field more specifically to a double hole fixed rotary tiller. BACKGROUND

[0002] Before the existing farmland sowing, need to remove the weed in the farmland and carry out rotary tillage operation to the farmland, currently generally adopt rotary tiller, and the rotary tiller is provided with rotary tiller, and the rotary tiller is shaped like a knife, can clean the farmland weed, complete the rotary tillage loose operation to the soil simultaneously, break the plough bottom layer, restore the soil's granular structure, improve the water storage capacity of soil, provide good seedbed for later sowing.

[0003] At present, most of the rotary tillers sold on the market are equipped with a plurality of rotary tillers on the shaft sleeve, for general soil, the traditional rotary tiller can play a good tillage effect, but for the soil with high hardness and strong viscosity, the blade of the traditional rotary tiller cannot bear the reaction force of the soil on the blade, which leads to the easy loosening of the blade connection and the easy damage of the blade.

[0004] For example, the utility model patent with the patent number ZL202321955576.4 discloses a rotary tiller and a knife group for weeding, which comprises a handle and a blade connected with the handle, and an installation hole is arranged on the handle, in order to realize the fixed connection of the rotary tiller and the shaft sleeve, an installation slot is further arranged on the handle, the installation slot is a circular arc groove, the number of installation holes is two, and the installation holes are symmetrically arranged on both sides of the installation slot.

[0005] In actual use, the blade and the handle of the above rotary tiller are linear, and the two installation holes are located on the extension line of the blade, therefore, the blade tip of the blade and the two installation holes are equivalent to a lever in the tillage process, the installation hole close to the blade is equivalent to a fulcrum, the distance from the blade tip to the installation hole close to the blade is a power arm, and the distance from the installation hole far from the blade to the installation hole close to the blade is a resistance arm, if the stress of the blade tip is F 1 during the tillage process of the rotary tiller, F 2 the stress of the installation hole far from the blade is F 1+ F 2 the stress of the installation hole close to the blade is Since the installation hole close to the blade bears a large force, the bolt at the installation hole close to the blade also bears a large force when the rotary tiller rotates, and the bolt will loosen after a long time of use; on the other hand, the distance from the installation hole far from the blade to the installation hole close to the blade is a resistance arm, the resistance arm is located at the handle, the handle is short and an arc-shaped installation slot is arranged at the handle to facilitate matching with the shaft sleeve, so that the handle is prone to deformation or breakage.

[0006] In summary, the existing rotary tiller is prone to loosening when used for hard and sticky soil tillage, the blade shakes greatly, and the handle is prone to breaking, which affects the tillage efficiency and service life of the rotary tiller. Utility model content

[0007] The utility model discloses a double-hole fixed rotary tiller which solves the problem of the existing rotary tiller being prone to loosening when used for hard and sticky soil tillage, the blade shaking greatly, and the handle being prone to breaking, which affects the tillage efficiency and service life of the rotary tiller.

[0008] The utility model adopts the technical scheme as follows:

[0009] A double-hole fixed rotary tiller, comprising an integrally-formed blade body and handle, the blade body and handle being L-shaped, the blade body comprising a blade back portion and a blade edge portion, the blade edge portion being arranged on the side away from the handle, an installation groove being arranged on the handle, first and second installation holes being arranged on both sides of the installation groove, the first installation hole being located on the handle near the blade edge portion, the second installation hole being located on the handle away from the blade edge portion, the included angle between the center line of the first and second installation holes and the horizontal line of the length direction of the handle being an acute angle, and the perpendicular distance from the center of the first installation hole to the blade body being less than the perpendicular distance from the center of the second installation hole to the blade body.

[0010] Preferably, cutting teeth and cutting grooves are arranged alternately and continuously along the blade edge portion, the end of the blade edge portion near the handle being arranged as a cutting groove, and the end of the blade edge portion away from the handle being arranged as a cutting tooth.

[0011] Preferably, the installation groove is an arc-shaped groove.

[0012] Preferably, the included angle between the center line of the first and second installation holes and the horizontal line of the length direction of the handle is 10°-30°.

[0013] Preferably, the thickness of the handle near the first installation hole is greater than the thickness of the handle near the second installation hole.

[0014] Preferably, a reinforcing rib is arranged on the handle near the first installation hole.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The angle between the traditional rotary tiller blade and the mounting hole is close to 180 degrees, which causes the connecting hole close to the blade to bear a large force, and the bolt is prone to loosening and damage. The blade and the shank of the rotary tiller are in L shape, two mounting holes are arranged on the shank, and the angle between the connecting line of the centers of the mounting holes and the blade is close to 90 degrees, so that the force on the first mounting hole close to the blade is greatly reduced. Therefore, when the rotary tiller is used for tillage of soil with large hardness and strong viscosity, the force concentrated on the mounting hole close to the blade is dispersed while the shank is fixed through the two mounting holes, so that the rotary tiller is more stable in installation and is not prone to loosening during operation.

[0017] Since the blade and the shank of the rotary tiller are in L shape, the rotary tiller is fixed through the mounting holes at both ends of the shank, and the middle part of the shank between the first mounting hole and the second mounting hole bears a stable force during operation of the rotary tiller, so that the breakage of the shank is effectively avoided.

[0018] The centers of the first mounting hole and the second mounting hole on the shank are not on the same straight line, and the angle between the connecting line of the centers of the first mounting hole and the second mounting hole and the horizontal line in the length direction of the shank is an acute angle, so that the rotary tiller can be fixed in the horizontal and vertical directions, thereby increasing the stability of the rotary tiller. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as a limitation on the scope, and other related drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 A perspective structural schematic view of the double-hole fixed rotary tiller provided by the embodiment of the present utility model.

[0021] Figure 2 A front view of the double-hole fixed rotary tiller provided by the embodiment of the present utility model.

[0022] Figure 3 A positioning schematic view of the first mounting hole and the second mounting hole provided by the embodiment of the present utility model.

[0023] Figure 4 A perspective structural schematic view of another double-hole fixed rotary tiller set provided by the embodiment of the present utility model.

[0024] 1, blade; 11, back part of blade; 12, cutting edge part of blade; 13, cutting tooth; 14, cutting groove; 2, shank; 21, first mounting hole; 22, second mounting hole; 23, mounting groove; 3, reinforcing rib. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0026] In the description of the present application, it should be noted that the terms "first" and "second" are used only for the purpose of description, and should not be understood as indicating or implying relative importance. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected", "provided" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The embodiments will be described below according to the overall structure of the present application.

[0027] In view of the problems existing in the existing rotary tiller, such as Figure 1 and Figure 2 As shown, the present embodiment provides a double-hole fixed rotary tiller, which comprises an integrally formed blade body 1 and a handle 2, the blade body 1 and the handle 2 are L-shaped, the blade body 1 comprises a blade back part 11 and a blade edge part 12, the blade edge part 12 is arranged on the side away from the handle 2, an installation groove 23 is arranged on the handle 2, first and second installation holes 21 and 22 are arranged on both sides of the installation groove 23, the first installation hole 21 is located at one end of the handle 2 close to the blade edge part 12, the second installation hole 22 is located at one end of the handle 2 away from the blade edge part 12, the included angle between the center connection line of the first and second installation holes 21 and 22 and the horizontal line of the length direction of the handle 2 is an acute angle, and the vertical distance from the center of the first installation hole 21 to the blade body 1 is less than the vertical distance from the center of the second installation hole 22 to the blade body 1.

[0028] The blade body and the handle of the rotary tiller are linear, two mounting holes are located on the blade body, the included angle between the blade body of the rotary tiller and the mounting hole is close to 180 degrees, therefore, the blade tip of the blade body and the two mounting holes are equivalent to a lever during the tillage process, the mounting hole close to the blade body is equivalent to the fulcrum, when the rotary tiller rotates under force, the bolt at this position also bears a larger force, and long-term use will cause the bolt to loosen. In the embodiment, the blade body 1 and the handle 2 of the rotary tiller are L-shaped, two mounting holes are arranged on the handle 2, which are a first mounting hole 21 and a second mounting hole 22, the line connecting the centers of the two mounting holes is close to 90° with the blade body 1, so that the force borne by the first mounting hole 21 close to the blade body 1 is greatly reduced compared with the force borne by the mounting hole close to the blade body of the conventional rotary tiller, therefore, when used for tillage in soil with large hardness and strong viscosity, the L-shaped rotary tiller disperses the force concentrated on the mounting hole close to the blade body (the first mounting hole 21) by fixing the handle 2 through the two mounting holes, so that the rotary tiller is more stable and is not easy to loosen during operation.

[0029] On the other hand, since the blade body 1 and the handle 2 of the rotary tiller are L-shaped, the rotary tiller is fixed through the mounting holes (the first mounting hole 21 and the second mounting hole 22) located at both ends of the handle 2, the middle part of the handle 2 is stable under force during the operation of the rotary tiller, and the breakage of the handle is effectively avoided.

[0030] Meanwhile, it is found in the use process that the first mounting hole 21 and the second mounting hole 22 located on both sides of the mounting groove 23 bear different forces during the tillage process, the first mounting hole 21 close to the blade edge part 12 bears a larger force, and the second mounting hole 22 away from the blade edge part 12 bears a smaller force, therefore, the first mounting hole 21 is greatly worn and is more prone to damage, in order to increase the stability of the rotary tiller and effectively avoid the damage of the handle caused by uneven force borne by the two mounting holes, in the embodiment, the first mounting hole 21 and the second mounting hole 22 are asymmetrically arranged, the centers of the first mounting hole 21 and the second mounting hole 22 located on the handle 2 are not on the same straight line, the included angle between the line connecting the centers of the first mounting hole 21 and the second mounting hole 22 and the horizontal line in the length direction of the handle 1 is an acute angle, the rotary tiller can be fixed in the horizontal and vertical directions, so that the stability of the rotary tiller is increased.

[0031] Meanwhile, in the embodiment, the first mounting hole 21 is arranged close to the blade body 1, and the second mounting hole 22 is arranged away from the blade body 1, therefore, the vertical distance from the center of the first mounting hole 21 to the blade body 1 is smaller than the vertical distance from the center of the second mounting hole 22 to the blade body 1, the distance from the first mounting hole 21 to the edge of the handle 2 is greater than the distance from the second mounting hole 22 to the edge of the handle 2, so that the first mounting hole 21 can bear a larger force and wear time compared with the second mounting hole 22, and the service life of the rotary tiller is prolonged.

[0032] To improve the soil-breaking and weed-removing capabilities of rotary tillers, such as Figure 2 As shown, cutting teeth 13 and cutting grooves 14 are continuously and alternately arranged along the blade portion 12; the cutting groove 14 is provided at the end of the blade portion 12 near the handle 2, and the cutting tooth 13 is provided at the end of the blade portion 12 away from the handle 2.

[0033] In this embodiment, a number of cutting teeth 13 and cutting grooves 14 are continuously arranged along the blade 12. During the rotation of the rotary tiller, due to the centrifugal force, weeds can only move outward in one direction along the blade 1. They pass through the cutting teeth 13 and cutting grooves 14 on the blade 1 in sequence, thus cutting the weeds. The cutting groove 14 is set at the end of the blade 12 near the handle 2. The cutting groove 14 is an arc-shaped groove that can intercept and cut the weeds, preventing them from moving towards the handle 2. The cutting teeth 13 are set at the end of the blade 12 away from the handle 2, thus breaking the soil during rotary tillage.

[0034] The mounting groove 23 is mainly used to connect with the central shaft or bushing. The appropriate shape can be selected according to the usage conditions. In this embodiment, the mounting groove 23 is an arc-shaped groove. This structure of the mounting groove 23 can be applied to cylindrical shafts and hexagonal shafts, etc.

[0035] To improve the stability of the rotary tiller blade, the centers of the first mounting hole 21 and the second mounting hole 22 on the handle 2 are not on the same straight line. The angle between the line connecting the centers of the first mounting hole 21 and the second mounting hole 22 and the horizontal line along the length of the handle 1 is an acute angle. Figure 3 As shown, the angle between the line connecting the centers of the first mounting hole 21 and the second mounting hole 22 and the horizontal line along the length of the tool holder 1 is . α , α The size is positively correlated with the size of the connecting shaft; when the connecting shaft is smaller... α When the connecting shaft is smaller, α Specifically, the angle between the line connecting the centers of the first mounting hole 21 and the second mounting hole 22 and the horizontal line along the length of the tool holder 2 is 10°-30°.

[0036] Since the first mounting hole 21 is subjected to greater force and is more prone to damage, in order to improve the stability of the handle at the first mounting hole 21, in this embodiment, the thickness of the handle 2 at the end near the first mounting hole 21 is greater than the thickness at the end near the second mounting hole 22. By thickening the handle at the first mounting hole 21, the strength at the first mounting hole 21 can be effectively increased, and the service life of the rotary tiller can be improved.

[0037] In another embodiment, such as Figure 4As shown, the reinforcing rib 3 is arranged on the shank 2 near one end of the first mounting hole 21. The reinforcing rib 3 can be arranged by welding or integral molding, and the reinforcing rib 3 is convenient to arrange, effectively reduces the weight of the blade body, and improves the working efficiency of the rotary tillage blade.

[0038] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be regarded as limiting the claims to which they relate.

Claims

1. A rotary tiller with a double-hole fixing mechanism, comprising an integrally formed blade (1) and a handle (2), characterized in that, The blade (1) and handle (2) are L-shaped. The blade (1) includes a back (11) and a cutting edge (12). The cutting edge (12) is located on the side away from the handle (2). A mounting groove (23) is provided on the handle (2). A first mounting hole (21) and a second mounting hole (22) are provided on both sides of the mounting groove (23). The first mounting hole (21) is located on the handle (2) at one end near the cutting edge (12). The second mounting hole (22) is located on the handle (2) at one end away from the cutting edge (12). The angle between the line connecting the centers of the first mounting hole (21) and the second mounting hole (22) and the horizontal line along the length of the handle (2) is an acute angle. The vertical distance from the center of the first mounting hole (21) to the blade (1) is less than the vertical distance from the center of the second mounting hole (22) to the blade (1).

2. The rotary tiller blade with double-hole fixing according to claim 1, characterized in that, Cutting teeth (13) and cutting grooves (14) are continuously and alternately arranged along the blade (12). The cutting groove (14) is provided at the end of the blade (12) near the handle (2), and the cutting tooth (13) is provided at the end of the blade (12) away from the handle (2).

3. A rotary tiller blade with double-hole fixing according to claim 1, characterized in that, The mounting groove (23) is an arc-shaped groove.

4. A rotary tiller blade with double-hole fixing according to claim 1, characterized in that, The angle between the line connecting the centers of the first mounting hole (21) and the second mounting hole (22) and the horizontal line along the length of the tool holder (2) is 10°-30°.

5. A rotary tiller blade with double-hole fixing according to claim 1, characterized in that, The thickness of the handle (2) at the end near the first mounting hole (21) is greater than the thickness at the end near the second mounting hole (22).

6. A rotary tiller blade with double-hole fixing according to claim 1, characterized in that, A reinforcing rib (3) is provided on one end of the tool holder (2) near the first mounting hole (21).

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