A lawn mower cutter head

Abstract

The present invention relates to the technical field of lawn mowers, and discloses a lawn mower cutter disc, including a disc body and a plurality of blade assemblies; the disc body is provided with a plurality of accommodating grooves for accommodating the blade assemblies; the blade assembly includes two guard plates and a blade sandwiched therebetween; the blade and the guard plate are pivotally connected to the disc body through a pivot joint; when the disc body rotates, the blade assembly is thrown out by centrifugal force; the portion of the blade thrown out of the disc body is edged on one side; the guard plate is provided with a notch near the edged side of the blade. When the cutter disc of the present invention rotates, the blade is thrown out by centrifugal force, and the blade can automatically rebound when it hits a hard object; and guard plates are provided on the upper and lower sides of the blade to prevent the fragments of the blade from flying out due to collision, thereby improving safety.

Description

Technical Field

[0001] The invention relates to a lawn mower component, in particular to a lawn mower cutter disc. Background Art

[0002] A lawn mower is a mechanical tool used for mowing lawns and plants. It mows by driving a cutter disc with a blade to rotate. Most existing lawn mowers have the blade fixedly installed on the outside of the cutter disc. The blade is always exposed to the outside. When transporting or storing the lawn mower, you need to pay attention to avoid the blade, or remove the blade after using the lawn mower to avoid being scratched by the blade.

[0003] Chinese patent CN206227012U discloses a blade-articulated lawn mower disc. The blade can be automatically retracted into the disc when not in use to prevent people from being scratched by the blade. However, the blade itself lacks a protective device. When the disc drives the blade to rotate at high speed, the blade hits a hard object, causing damage or even breakage of the blade. The broken blade flies out and easily causes injuries to people, posing a safety hazard. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a lawn mower cutter disc, which uses centrifugal force to throw out the blade when the cutter disc rotates. The blade can automatically rebound when it hits a hard object, and guard plates are arranged on the upper and lower sides of the blade to prevent fragments caused by blade collision from flying out, thereby improving safety.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a lawn mower cutter disc, including a disc body and a plurality of blade assemblies; the disc body is provided with a plurality of accommodating grooves for accommodating the blade assemblies; the blade assembly includes two guard plates and a blade sandwiched therebetween; the blade and the guard plates are pivotally connected to the disc body through a pivot member; when the disc body rotates, the blade assembly is thrown out by centrifugal force.

[0006] Furthermore, the portion of the blade that is thrown out of the disc body is sharpened on one side; and the guard plate is provided with a notch near the sharpened side of the blade.

[0007] Furthermore, a step groove is arranged on one side of the accommodating groove close to the pivoting member; the step groove can just accommodate the blade to enter and exit.

[0008] Furthermore, the disk body is provided with a plurality of observation holes penetrating the accommodating grooves.

[0009] Furthermore, a plurality of sinking grooves are provided on the disc body.

[0010] The beneficial effects of the present invention are:

[0011] 1. The blade is pivotally connected to the disc body, and a receiving groove is provided in the disc body for receiving the blade; when the disc rotates, the centrifugal force is used to throw the blade out.

[0012] 2. When the blade is swung out, the guard plate is swung out synchronously and keeps moving synchronously with the blade. When the blade collides with hard objects and breaks, it can prevent the broken blade from flying out and causing injuries to people, thereby improving safety.

[0013] 3. A notch corresponding to the blade edge is set on the guard plate to reduce the area of ​​the blade exposed outside the guard plate and further improve safety.

[0014] 4. A step groove is set at one end of the accommodating groove, and the blade is just inserted into the step groove when it is swung out, so that the blade is swung out at a larger angle than the guard plate, ensuring that the blade can leak out when it is sharpened, avoiding the blade being blocked by the guard plate and unable to cut the grass normally.

[0015] 5. The observation hole on the disc body can be used to check whether the blade is damaged, which is convenient for replacing the disc; the sink groove can reduce the overall weight of the disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the cutter disc structure;

[0017] Figure 2 A schematic diagram of the blade assembly being received in the receiving slot;

[0018] Figure 3 It is an enlarged schematic diagram of the structure of the accommodating groove;

[0019] Figure 4 It is a schematic diagram of the structure of the blade assembly;

[0020] Figure 5 This is a schematic diagram of the cutter disc cross section.

[0021] The markings in the figure are: 1, disk body; 11, receiving groove; 111, step groove; 12, observation hole; 13, sink groove; 2, blade assembly; 21, guard plate; 22, blade; 23, pivot part. DETAILED DESCRIPTION

[0022] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0023] Example

[0024] like Figures 1 to 5 As shown, a lawn mower cutter disc comprises a disc body 1 and a plurality of blade assemblies 2; the disc body 1 is provided with a plurality of accommodating grooves 11 for accommodating the blade assemblies 2; the blade assembly 2 comprises two guard plates 21 and a blade 22 sandwiched therebetween; the blade 22 and the guard plates 21 are pivotally connected to the disc body 1 via a pivot 23; when the disc body 1 rotates, the blade assembly 2 is thrown out by centrifugal force.

[0025] On the basis of the above, the blade 22 is partially sharpened on one side of the disk body 1 ; and a notch is provided on the guard plate 21 near the sharpened side of the blade 22 .

[0026] On the basis of the above, a step groove 111 is provided on one side of the accommodating groove 11 close to the pivoting member 23 ; the step groove 111 can just accommodate the blade 22 to enter and exit.

[0027] On the basis of the above, the disk body 1 is provided with a plurality of observation holes 12 penetrating the accommodating grooves 11 .

[0028] On the basis of the above, a plurality of sinking grooves 13 are provided on the disk body 1 .

[0029] In actual use, the cutter disc rotates as a whole, and the blade assembly 2 is thrown out under the action of centrifugal force, and rotates to the other end of the accommodating groove 11 along the pivot 23; the blade 22 can enter the step groove 111, so that the rotation angle of the blade 22 is slightly larger than the guard plate 21, thereby ensuring that the edge portion of the blade 22 can completely leak out of the guard plate 21, avoiding the influence of the mowing efficiency due to the obstruction of the guard plate.

[0030] The blade assembly 2 rebounds when encountering a hard object, which will not affect the rotation of the disc body 1, thereby avoiding damage to the entire cutter disc; if the blade 22 hits a hard object and breaks, only the blade 22 needs to be replaced, without replacing the entire cutter disc; the guard plate 21 can effectively prevent the blade 22 from breaking and scattering, thereby avoiding personal injury.

[0031] The above embodiments should not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent conversion shall fall within the protection scope of the present invention.

Claims

1. A lawn mower cutter head, comprising a disk body (1) and a plurality of blade assemblies (2); Characterized in that: A plurality of receiving grooves (11) for receiving the blade assemblies (2) are provided in the disk body (1); the blade assembly (2) includes two guard plates (21) and a blade (22) sandwiched therebetween; the blade (22) and the guard plate (21) are pivotally connected to the disk body (1) through a pivot member (23); when the disk body (1) rotates, the blade assembly (2) is thrown out by centrifugal force, and a part of the blade (22) thrown out of the disk body (1) is sharpened on one side; a notch is provided on the guard plate (21) close to the sharpened side of the blade (22); a step groove (111) is provided on one side of the receiving groove (11) close to the pivot member (23); the step groove (111) can just accommodate the blade (22) to enter and exit.

2. A lawn mower cutter head according to claim 1, Characterized in that: A plurality of observation holes (12) penetrating through the receiving grooves (11) are provided on the disk body (1).

3. A lawn mower cutter head according to claim 1, Characterized in that: A plurality of counterbores (13) are provided on the disk body (1).

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