Grass chopping knife for tall grass

Abstract

The utility model discloses a grass chopping knife for tall grass, and belongs to the technical field of grass chopping knives. The grass chopping device mainly comprises a grass chopping shaft, one end or two ends of the grass chopping shaft are fixedly connected with a connecting shaft, the outer side wall of the grass chopping shaft is rotatably connected with a plurality of groups of grass chopping cutter assemblies, each grass chopping cutter assembly comprises a middle cut-off cutter, side cut-off cutters are symmetrically arranged on the two sides of each middle cut-off cutter respectively, and each side cut-off cutter comprises a bottom cut-off cutter. An inclined cutter is fixedly connected to the upper portion of the bottom cut-off tool and is arranged in an inclined mode towards the side away from the middle cut-off tool. The grass chopping shaft is provided with the rotatable grass chopping knife assembly, and the grass chopping knife assembly is thrown up under the action of centrifugal force through high-speed rotation of the grass chopping shaft, so that stems of tall grass can be directly chopped in the throwing process of the grass chopping knife assembly, the tall grass is prevented from winding the grass chopping shaft and the grass chopping knife assembly, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of grass-chopping knives, and in particular relates to a grass-chopping knife for tall grass. Background Art

[0002] At present, mowers or micro-tillage machines are mainly used for weeding. Mowers are provided with mowing blades, and effective weeding is achieved by rotating and cutting the blades. When weeding, micro-tillage machines mainly weed by cutting and digging the grass roots on the ground with rotary tillage blades. For example, a Chinese patent with the authorization announcement number "CN104854987B" discloses a micro-tillage weeder, including a transmission assembly, an engine connected to the transmission assembly through a clutch, an armrest mounted on the transmission assembly housing, a knife shaft arranged on the transmission assembly, and a weeding assembly symmetrically arranged at both ends of the knife shaft; the weeding assembly includes a low-speed sleeve and a high-speed sleeve; two circles of external tillage knife systems are arranged on the outer circumferential surface of the high-speed sleeve, and the external weeding knives in the two circles of external tillage knife systems are staggered; the external weeding knives are connected to the external rotary tillage knife seat by bolts, and the external weeding knife seat is vertically fixed to the high-speed sleeve. When in use, the two processes of rotary tillage and weeding can be completed in one trip, which improves the work efficiency of agricultural production and reduces labor intensity.

[0003] Although the above patent solves the problem of weeding, when used, the above method cannot weed tall grass. When rotary tillage and weeding are carried out at the same time, the roots of short grass can be directly cut and dug out, but the tall grass will be entangled on the rotary tillage shaft, causing the machine to be blocked or even shut down directly, and the subsequent cleaning is time-consuming and labor-intensive. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a grass chopping knife for tall grass, wherein a rotatable grass chopping knife assembly is arranged on a grass chopping shaft, and the grass chopping knife assembly is swung up by the high-speed rotation of the grass chopping shaft under the action of centrifugal force, so that the grass chopping knife assembly can directly chop the stems of the tall grass during the swinging process, thereby preventing the tall grass from being entangled with the grass chopping shaft and the grass chopping knife assembly, and greatly improving the working efficiency.

[0005] The tall grass chopping knife comprises a grass chopping shaft, one end or both ends of the grass chopping shaft is fixedly connected to a connecting shaft, a plurality of grass chopping knife assemblies are rotatably connected to the outer wall of the grass chopping shaft, the grass chopping knife assembly comprises a middle cutting knife, both sides of the middle cutting knife are respectively provided with symmetrically arranged side cutting knives, the side cutting knives comprise a bottom cutting knife, the upper part of the bottom cutting knife is fixedly connected to an oblique cutting knife, and the oblique cutting knife is inclined to a side away from the middle cutting knife.

[0006] Preferably, the middle cutting knife has first cutting surfaces with inclinations on both sides, and grass-crushing teeth 1 are arranged on the first cutting surfaces; the bottom cutting knife and the bevel cutting knife have second cutting surfaces on both sides respectively, and grass-crushing teeth 2 are arranged on the second cutting surfaces.

[0007] Preferably, the grass chopping knife assembly is connected to the grass chopping shaft via a fixing mechanism, the fixing mechanism comprises a first fixing seat and a second fixing seat, the first fixing seat and the second fixing seat are both fixedly connected to the outer side wall of the grass chopping shaft, a mounting shaft is provided between the first fixing seat and the second fixing seat, the grass chopping knife assembly is arranged between the first fixing seat and the second fixing seat, and the middle cutting knife and the side cutting knives on both sides are rotatably connected to the mounting shaft.

[0008] Preferably, the first fixing seat and the second fixing seat are both provided with through holes, the installation shaft passes through the through holes, and a detachable fixing pin is inserted into the installation shaft located outside the first fixing seat and the second fixing seat.

[0009] Preferably, a mounting hole is provided at one end or both ends of the grass-chopping shaft, and the mounting hole is a square hole or a multi-square hole, and a square shaft or a multi-square shaft matching with the mounting hole is provided on the connecting shaft.

[0010] Preferably, adjacent grass cutting blade assemblies are staggered.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model provides a rotatable grass chopping knife assembly on the grass chopping shaft. When in use, the grass chopping shaft rotates at high speed, and the grass chopping knife assembly is swung up under the action of centrifugal force, so that the grass chopping knife assembly can directly chop the stems of tall grass during the swinging process, thereby preventing the tall grass from being entangled with the grass chopping shaft and the grass chopping knife assembly, and greatly improving the work efficiency.

[0013] 2. The grass shredder assembly uses the central cutting knife and the oblique cutting knives on both sides that are inclined outward to achieve simultaneous shredding from three directions, which increases the contact area with the tall grass and improves the grass shredding efficiency. At the same time, a bottom cutting knife parallel to the central cutting knife is arranged at the bottom of the oblique cutting knife, which increases the cutting force at the bottom and further improves the cutting force of the grass stems to prevent the tall grass from entangled in the grass shredder assembly.

[0014] 3. The middle cutting knife and the side cutting knife are respectively provided with grass-chopping teeth one and two. The grass-chopping teeth one and two have an anti-slip function, which prevents the tall grass from sliding away when chopping the grass, thereby improving the chopping efficiency of the tall grass. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of embodiment 1;

[0016] Figure 2 for Figure 1A partial enlarged view of part A;

[0017] Figure 3 It is a structural schematic diagram of Embodiment 2;

[0018] Figure 4 This is a reference diagram of the use status of the utility model.

[0019] In the figure, 1. grass chopping shaft; 101. mounting hole; 102. first fixing seat; 103. second fixing seat; 104. mounting shaft; 105. fixing pin; 2. grass chopping knife assembly; 201. bottom cutting knife; 202. second grass chopping tooth; 203. oblique cutting knife; 204. second cutting surface; 205. middle cutting knife; 206. first cutting surface; 207. first grass chopping tooth; 3. connecting shaft; 4. working part protection cover; 5. micro-tillage machine. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0022] Embodiment 1:

[0023] like Figure 1 and Figure 2 As shown, a grass chopping knife for tall grass comprises a grass chopping shaft 1, both ends of which are fixedly connected with connecting shafts 3 respectively. When in use, the connecting shaft 3 is transmission-connected to the driving mechanism of the micro-tillage machine 5. A plurality of grass chopping knife assemblies 2 are rotatably connected to the outer wall of the grass chopping shaft 1. The grass chopping knife assembly 2 comprises a middle cutting knife 205. Both sides of the middle cutting knife 205 are provided with first cutting surfaces 206 with an inclination. The intersection of the first cutting surface 206 and the middle cutting knife 205 at an acute angle is a first cutting edge. The first cutting surface 206 is provided with grass chopping teeth 207. The grass chopping teeth 207 have an anti-slip effect to prevent the middle cutting knife 205 from sliding away when the tall grass is swung, thereby improving the chopping efficiency of the tall grass.

[0024] The middle cutting knife 205 is provided with symmetrically arranged side cutting knives on both sides. Specifically, the side cutting knives include a bottom cutting knife 201, and a bevel cutting knife 203 is fixedly connected to the upper part of the bottom cutting knife 201. The bevel cutting knife 203 is inclined to the side away from the middle cutting knife 205. The inclination angle a of the bevel cutting knife 203 is preferably 30-45°. The bottom cutting knife 201 and the bevel cutting knife 203 are respectively provided with an inclined second cutting surface 204 on both sides. The intersection of the second cutting surface 204 and the side cutting knife at an acute angle is the second cutting edge. The second cutting edge is preferably arranged close to one side of the middle cutting knife 205. The second cutting surface 204 is provided with a second grass crushing tooth 202. The function of the second grass crushing tooth 202 is the same as that of the first grass crushing tooth 207, which will not be repeated. The grass chopping knife assembly 2 realizes simultaneous chopping from three directions through the middle cutting knife 205 and the oblique cutting knives 203 arranged outwardly on both sides, thereby increasing the contact surface with the tall grass and improving the grass chopping efficiency; at the same time, a bottom cutting knife 201 arranged parallel to the middle cutting knife 205 is arranged at the bottom of the oblique cutting knife 203, which increases the cutting force at the bottom, further improves the cutting force of the grass stems, and prevents the tall grass from entangled in the grass chopping knife assembly 2.

[0025] Each group of grass chopping blade assemblies 2 is connected to the grass chopping shaft 1 through a fixing mechanism. Specifically, the fixing mechanism includes a first fixing seat 102 and a second fixing seat 103. The first fixing seat 102 and the second fixing seat 103 are both welded and fixed to the outer wall of the grass chopping shaft 1. A mounting shaft 104 is provided between the first fixing seat 102 and the second fixing seat 103. During processing, through holes are opened on the first fixing seat 102 and the second fixing seat 103, and the mounting shaft 104 passes through the through holes. The mounting shaft 104 located on the outside of the first fixing seat 102 and the second fixing seat 103 is fixed by inserting a detachable fixing pin 105 to limit the mounting shaft 104.

[0026] During installation, the grass-chopping blade assembly 2 is arranged between the first fixing seat 102 and the second fixing seat 103, and the lower parts of the middle cutting blade 205 and the side cutting blades on both sides are rotatably connected to the installation shaft 104. During use, the grass-chopping shaft 1 rotates at a high speed, and the grass-chopping blade assembly 2 is swung up under the action of centrifugal force. The grass-chopping blade assembly 2 can directly chop the stems of tall grass during the swinging process, thereby preventing the tall grass from being entangled with the grass-chopping shaft 1, greatly improving the working efficiency; at the same time, the connecting shafts 3 at both ends of the grass-chopping shaft 1 can be directly connected to the working end of the micro-tillage machine 5, that is, the grass-chopping shaft 1 can replace other working parts of the micro-tillage machine 5, thereby not hindering the rotary tillage operation of the micro-tillage machine 5.

[0027] Embodiment 2:

[0028] like Figure 3As shown, a grass cutting knife for tall grass, adjacent grass cutting knife assemblies 2 are staggered, one end of the grass cutting shaft 1 is provided with a mounting hole 101, the mounting hole 101 is a square hole or a multi-square hole, the multi-square hole is any one of a pentagonal hole, a hexagonal hole or an octagonal hole, a matching square shaft or a multi-square shaft is inserted into the mounting hole 101, the square shaft or the multi-square shaft is fixedly connected to the connecting shaft 3; the other end of the grass cutting shaft 1 is directly fixedly connected to the connecting shaft 3, and the rest is the same as the first embodiment.

[0029] Since one end of the working part of the micro-tillage machine 5 needs to be used in conjunction with a corresponding gear transmission, this embodiment adopts a one-end plug-in method, which is easier to disassemble and assemble and more convenient to use.

[0030] Embodiment three:

[0031] A grass chopping knife for tall grass, with mounting holes 101 at both ends of the grass chopping shaft 1, and matching square shafts or polygonal shafts are inserted into the mounting holes 101 on both sides, and the rest is the same as the second embodiment.

[0032] like Figure 4 As shown, when the utility model is in use, the grass-chopping shaft 1 directly replaces the working parts of the micro-tillage machine 5, that is, one end of the grass-chopping shaft 1 is rotatably connected to the working part protection cover 4 through the connecting shaft 3, and one end of the grass-chopping shaft 1 is transmission-connected to the working part gearbox or the micro-tillage machine driving mechanism through the connecting shaft 3. When working, the micro-tillage machine driving mechanism drives the connecting shaft 3 and the grass-chopping shaft 1 to rotate at a high speed, and under the action of centrifugal force, the grass-chopping knife assembly 2 is thrown up, wherein the middle cutting knife 205 and the oblique cutting knives 203 on both sides chop from three directions at the same time, thereby improving the grass-chopping efficiency; at the same time, the bottom cutting knife 201 arranged at the bottom of the oblique cutting knife 203 in parallel with the middle cutting knife 205 increases the cutting force at the bottom, ensures the cutting force of the grass stem, and realizes that in the weeding process, the high grass is directly broken, and the high grass is prevented from being entangled in the grass-chopping knife assembly 2 and the grass-chopping shaft 1, which is more convenient to use.

[0033] Finally, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A grass chopping knife for tall grass, comprising a grass chopping shaft (1), characterized in that: One end or both ends of the grass chopping shaft (1) are fixedly connected to a connecting shaft (3); a plurality of grass chopping knife assemblies (2) are rotatably connected to the outer wall of the grass chopping shaft (1); the grass chopping knife assemblies (2) include a middle cutting knife (205); two sides of the middle cutting knife (205) are respectively provided with symmetrically arranged side cutting knives; the side cutting knives include a bottom cutting knife (201); an upper portion of the bottom cutting knife (201) is fixedly connected to an oblique cutting knife (203); the oblique cutting knife (203) is arranged to be inclined toward a side away from the middle cutting knife (205).

2. The tall grass shredder according to claim 1, characterized in that: The middle cutting knife (205) is provided with first cutting surfaces (206) with an inclination on both sides, and a first grass-crushing tooth (207) is provided on the first cutting surface (206); the bottom cutting knife (201) and the bevel cutting knife (203) are respectively provided with second cutting surfaces (204) on both sides, and a second grass-crushing tooth (202) is provided on the second cutting surface (204).

3. The tall grass shredder according to claim 1, characterized in that: The grass-chopping blade assembly (2) is connected to the grass-chopping shaft (1) via a fixing mechanism, wherein the fixing mechanism comprises a first fixing seat (102) and a second fixing seat (103), wherein the first fixing seat (102) and the second fixing seat (103) are both fixedly connected to the outer wall of the grass-chopping shaft (1), and a mounting shaft (104) is provided between the first fixing seat (102) and the second fixing seat (103). The grass-chopping blade assembly (2) is arranged between the first fixing seat (102) and the second fixing seat (103), and the middle cutting blade (205) and the side cutting blades on both sides are rotatably connected to the mounting shaft (104).

4. The tall grass shredder according to claim 3, characterized in that: The first fixing seat (102) and the second fixing seat (103) are both provided with through holes, through which the mounting shaft (104) passes, and a detachable fixing pin (105) is inserted into the mounting shaft (104) located outside the first fixing seat (102) and the second fixing seat (103).

5. The tall grass shredder according to claim 1, characterized in that: One end or both ends of the grass-chopping shaft (1) are provided with a mounting hole (101), the mounting hole (101) is a square hole or a multi-square hole, and the connecting shaft (3) is provided with a square shaft or a multi-square shaft matching the mounting hole (101).

6. The tall grass shredder according to any one of claims 1 to 5, characterized in that: Adjacent grass cutting blade assemblies (2) are arranged in a staggered manner.

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