A cutting mechanism for a rotary weeding machine

Abstract

The application discloses a rotary weeding machine cutter mechanism and relates to the technical field of plant protection equipment. The rotary weeding machine cutter mechanism comprises a cutter disc and cutters. A plurality of the cutters are uniformly arranged on the cutter disc. The cutters are symmetrical structures. The longitudinal symmetry line of the cutters is the cutter central axis. The cutter central axis passes through the center of the circle of the cutter disc. The application can reduce energy consumption, reduce the rate of grass entanglement and improve the weeding efficiency.

Description

Technical Field

[0001] This invention relates to the field of plant protection equipment technology, and in particular to a cutting mechanism for a rotary weed cutter. Background Technology

[0002] Weeds can be considered a serious plant pest, potentially reducing crop yields by up to 34%. Weed control using mowers is necessary to reduce environmental pollution and ensure food safety; however, few mower designs currently address energy consumption and weed entanglement issues. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a cutting mechanism for a rotary weed cutter that can reduce energy consumption, decrease weed entanglement, and improve weeding efficiency.

[0004] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0005] A rotary weed cutter mechanism includes a cutter disc and cutters. Several cutters are evenly mounted on the cutter disc. The cutters have a symmetrical structure, with the longitudinal symmetry line of the cutter being the central axis of the cutter. The central axis of the cutter passes through the center of the circle containing the cutter disc.

[0006] In the above scheme, the end of the cutter that extends out of the cutter disc is the outer end of the cutter, and the width of the blade at the outer end of the cutter is greater than the width of the blade at the tail of the blade; the outer end of the cutter and the tail of the blade are connected by the curve of the cutter blade.

[0007] In the above scheme, the angle between the tangent of the cutting edge curve and the central axis of the cutting edge gradually increases from the outer end of the cutting edge to the tail end.

[0008] In the above scheme, the cutting edge curve of the cutter conforms to r = 260cosθ - 533.4sinθ, where r is the polar radius and θ is the polar angle.

[0009] In the above scheme, the cutter has cutting edge angles on both sides, and the angle range of the cutting edge angles is 20° to 30°.

[0010] In the above scheme, the cutter is provided with a mounting hole, which cooperates with the mounting pin provided on the cutter head.

[0011] In the above scheme, the thickness of the cutting blade is 4mm to 10mm.

[0012] In the above scheme, the cutter head is at a certain angle to the ground during operation.

[0013] In the above scheme, the angle between the cutter head and the ground is less than 15°.

[0014] In the above scheme, the cutting blades mounted on the cutter head face the ground.

[0015] Beneficial effects:

[0016] 1. To reduce grass entanglement, it is necessary to ensure that the cutting force at the outer end of the cutter is the same as the cutting force at the tail of the blade; that is, the cutting force at the high cutting speed position is the same as the cutting force at the low cutting speed position. Since a larger sliding angle within a certain range results in a better sliding cutting effect and lower cutting resistance, this invention makes the angle between the tangent of the cutter blade curve and the central axis of the cutter gradually increase from the outer end to the tail of the blade.

[0017] 2. In order to reduce the cutting force, the blade curve of the weed cutter needs to be an outward convex arc. Therefore, the present invention adopts the method that the width of the blade at the outer end of the cutter is greater than the width of the blade at the tail end. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cutting mechanism of a rotary weed cutter;

[0019] Figure 2 for Figure 1 A schematic diagram of the cutting tool structure involved in the process;

[0020] Figure 3 This is a schematic diagram of the cutting edge curve of a cutting tool;

[0021] Figure 4 This is a schematic diagram of the cutter head structure;

[0022] Figure 5 This is a schematic diagram showing the relative position of the cutter head to the ground.

[0023] Figure label:

[0024] 1-Cutter head; 2-Cutter blade; 3-Mounting hole; 4-Cutter blade tail; 5-Outer end of cutter blade; 6-Central axis of cutter blade; 7-Cutter blade angle; 8-Cutter blade curve; 9-Mounting pin; 10-Ground; 11-Angle between cutter head and ground. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 an electrical 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 invention according to the specific circumstances.

[0028] A cutting mechanism for a rotary weed cutter includes a cutter head 1 and a cutting blade 2; the base of the cutting blade 2 is provided with a mounting hole 3, and the cutter head 1 is provided with multiple sets of mounting pins 9; the cutting blade 2 is fixed to the cutter head 1 through the mounting hole 3 and the mounting pins 9.

[0029] The cutter head 1 is a straight cylinder or can be equivalent to a straight cylinder. The cutter head 1 can rotate around the central axis of the straight cylinder. The cutter head 1 can be placed at a certain angle to the ground 10. The angle 11 between the cutter head 1 and the ground is not greater than 15°. The end of the cutter head 1 where the cutter 2 is installed faces the ground 10. The mounting pins 9 are evenly arranged on the same surface of the cutter head 2.

[0030] The thickness of the cutting blade 2 is not less than 4 mm and not more than 10 mm; the width of the blade at the outer end 5 is greater than the width of the blade at the tail end 4, and the angle between the tangent of the cutting edge curve 8 and the central axis 6 of the cutting blade gradually increases from the outer end 5 to the tail end 4; the cutting edge curve 8 adopts the equation r = 260cosθ - 533.4sinθ, where r is the polar diameter and θ is the polar angle; the cutting edge angle 7 is not less than 20° and not more than 30°. When the cutting blade 2 is installed on the cutter head 2, the central axis 6 of the cutting blade passes through the center of the bottom surface of the cutter head 2, that is, the instantaneous velocity direction of the cutting blade during the cutting operation is perpendicular to the central axis 6 of the cutting blade.

[0031] Combined with appendix Figure 1 As shown, a low-consumption, anti-tangling grass cutter mechanism includes a cutter disc 1 and a cutter 2. The cutter 2 is provided with a mounting hole 3, and the cutter disc 1 is provided with a mounting pin 9. The cutter 2 is mounted on the cutter disc 1 through the mounting hole 3 and the mounting pin 9. The end of the cutter disc 1 with the blade facing the ground. The cutter disc 1 rotates around the central axis of the cutter disc, which simultaneously drives the cutter 2 to rotate and cut the weeds on the ground. The mounting pin 9 and the mounting hole 3 ensure that the central axis 6 of the cutter 2 passes through the center of the bottom surface of the cutter disc 2 during the cutting operation, that is, the instantaneous velocity direction of the cutter during the cutting operation is perpendicular to the central axis 6 of the cutter.

[0032] Figure 2 This is a schematic diagram of the cutter 2 in the cutting mechanism of the present invention. The angle between the tangent of the cutter blade curve 8 and the central axis 6 of the cutter gradually increases from the outer end 5 to the tail 4 of the cutter. This ensures that the sliding angle gradually increases from the outer end 5 to the tail 4, and the sliding effect offsets the reduction in cutting speed, resulting in approximately the same cutting resistance on the blade and reducing the rate of weed entanglement. At the same time, the width of the blade body at the outer end 5 is greater than the width of the blade body at the tail 4, making the cutter blade curve 8 convex outward, ensuring that the cutting resistance on the blade is smaller when cutting weeds. The blade angle 8 is not less than 20° and not more than 30°, further ensuring the reduction of cutting resistance and guaranteeing the durability of the cutter. To ensure passability and safety during cutting, the thickness of the cutter is not less than 4 mm and not more than 10 mm.

[0033] Figure 3 This is a diagram of the cutting edge of the cutting tool of the present invention. The cutting edge curve 8 adopts the equation r = 260cosθ - 533.4sinθ, where r is the polar radius and θ is the polar angle. Point O in the diagram is the origin of the polar coordinate system.

[0034] Figure 4 This is a schematic diagram of the cutter head 1 in the cutting mechanism of the present invention. The cutter head 1 is provided with a mounting pin 9. The cutter head 1 is a straight cylinder or can be equivalent to a straight cylinder. The cutter head 1 can rotate around the central axis of the straight cylinder. The end of the cutter head 1 on which the cutter 2 is mounted faces the ground.

[0035] Figure 5 The diagram shows the relative position of the cutter head 1 and the ground 10 in the cutting mechanism of the present invention. The angle 11 between the cutter head and the ground is not greater than 15°. Tilting the blade at a certain angle can reduce cutting resistance, while excessive tilting may affect the weeding operation.

[0036] The specific design of the blade curve 8 can be modified according to the type and proportion of weeds being removed and the mechanical properties under high-speed cutting.

[0037] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A cutter mechanism of a rotary weeding machine, characterized by comprising: Including cutter head (1) and cutter (2), several cutter (2) is installed on cutter head (1) evenly, the cutter (2) is symmetrical structure, the longitudinal symmetry line of cutter (2) is cutter central axis (6), the cutter central axis (6) passes the center of the circle of cutter head (1); The cutter (2) extends out of the cutter head (1) as a cutter outer end (5), the cutter body width at the cutter outer end (5) is greater than the cutter body width at the cutter edge tail (4); the cutter outer end (5) and the cutter edge tail (4) are connected through a cutter edge curve (8); the tangent of the cutter edge curve (8) and the cutter central axis (6) form an angle that gradually increases from the cutter outer end (5) to the cutter edge tail (4); the cutter edge curve (8) conforms to wherein r is the polar radius and θ is the polar angle.

2. The rotating blade mechanism of the weeding machine according to claim 1, wherein The cutter (2) is provided with cutter blade angle (7) on both sides, the angle range of cutter blade angle (7) is 20°-30°.

3. The rotating blade mechanism of the weeding machine according to claim 1, wherein The cutter (2) is provided with mounting hole (3), the mounting hole (3) is matched with the mounting pin (9) arranged on cutter head (1).

4. The rotating weed trimmer cutting head of claim 1, wherein, The thickness of cutter (2) is 4mm-10mm.

5. The rotating weed trimmer cutting head of claim 1 wherein, When working, cutter head (1) is at a certain angle with ground (10).

6. A rotary lawn mower cutter mechanism according to claim 5 wherein, The angle between cutter head (1) and ground (10) is less than 15°.

7. The rotating weed trimmer cutting head of claim 5, wherein, The cutter (2) installed on cutter head (1) is towards ground (10).

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