Lawn mower blade with protective structure

Abstract

The utility model relates to the technical field of cutting blades, and discloses a mower blade with a protective structure, which comprises a mounting plate, three fixing plates fixedly arranged on the outer wall of the mounting plate, a clamping plate fixedly arranged at the front ends of the fixing plates, a cutting knife arranged at the front end of the clamping plate, and a protective assembly arranged between the clamping plate and the cutting knife. The protection assembly comprises two sets of movable rods fixedly arranged at the rear end of the cutting knife, springs are arranged on the outer walls of the movable rods, the rear ends of the movable rods penetrate through the fixing plate, and first nuts are arranged on the outer walls of the movable rods in a threaded mode, and according to the mower blade with the protection structure, the cutting knife can be protected, and it is guaranteed that the cutting knife is used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting blades, in particular to a lawn mower blade with a protective structure. Background Art

[0002] A lawn mower generally refers to a mechanical tool for trimming lawns or vegetation. It includes a high-speed rotating cutter disc and a multi-wheeled travel unit that drives the cutter disc to move. The travel unit can be divided into gasoline-driven, diesel-driven, and small electric-driven according to the power type. The travel unit drives the high-speed rotating cutter disc to move along a specified path, and the vegetation is trimmed when the cutter disc rotates at high speed.

[0003] The existing patent with publication number CN211580672U proposes a cutting blade and a lawn mower for a lawn mower, wherein the front edge of the cutting portion of the device has a blade for performing cutting operations, and the cutting portion includes a first cutting portion and a second cutting portion, one end of the second cutting portion is connected to the support portion, and the other end is connected to the first cutting portion; the first cutting portion has N cross-sections along the radial direction, each cross-section has a bending and torsion center, and the cross-section is bent and twisted at the corresponding bending and torsion center, and an angle of attack is formed between the chord of the cross-section and the rotation plane. The angle of attack increases from the inside to the outside along the radial direction, and adjacent cross-sections are smoothly connected, thereby enhancing the suction force generated by the rotation of the cutting blade.

[0004] When the device is mowing the lawn, the cutting part and the supporting part are integrated. When the cutting part contacts the protruding stones in the lawn, it will directly hit the cutting part, causing damage to the cutting part or breaking the supporting part, making it impossible to better protect the cutting part. Utility Model Content

[0005] The purpose of the utility model is to provide a lawn mower blade with a protective structure to solve the problem that the cutting part and the supporting part of the existing device are arranged in one piece, and when the cutting part contacts the protruding stones in the lawn, it will directly hit the cutting part, causing damage to the cutting part or breakage of the supporting part, and the cutting part cannot be better protected.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lawn mower blade with a protective structure, comprising a mounting plate, three fixing plates fixedly provided on the outer wall of the mounting plate, a clamping plate fixedly provided on the front end of the fixing plate, a cutting knife provided on the front end of the clamping plate, a protective assembly installed between the clamping plate and the cutting knife, the protective assembly comprising two groups of movable rods fixedly provided at the rear end of the cutting knife, a spring provided on the outer wall of the movable rod, the rear end of the movable rod passing through the fixing plate and a first nut provided on a threaded outer wall.

[0007] Preferably, the upper and lower ends of the mounting plate are provided with reinforcement structures, and the reinforcement structure includes a first fixing ring and a second fixing ring fixedly provided on the upper end of the mounting plate.

[0008] Preferably, a first screw is provided inside the first fixing ring, and a second nut is provided at the lower end of the second fixing ring at the output end of the first screw.

[0009] Preferably, a clamping rod is fixedly provided at one end of the first fixing ring and the second fixing ring close to the mounting plate, and a clamping hole is opened inside the mounting plate at one end of the clamping rod.

[0010] Preferably, a rectangular plate is fixedly provided at the rear end of the clamping plate, and a rectangular groove is provided at the front end of the fixed plate located at the rear end of the rectangular plate.

[0011] Preferably, docking grooves are provided on both sides of the clamping plate, which are inserted into the upper and lower ends of the fixed plate. A second screw is provided inside the clamping plate, and the output end of the second screw passes through the fixed plate and a third nut is provided on the outer wall thread.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1) By setting up a protective structure, the motor output end drives the mounting plate to rotate. When the cutting blade contacts protruding stones or other hard objects on the lawn, the cutting blade will play a buffering role after contact with the stone, reducing the impact force, avoiding direct breakage of the cutting blade, and better protecting the cutting blade.

[0014] 2) By setting up a reinforcement structure, the three fixing plates are reinforced to avoid breakage or deformation at the connection between the reinforcement plate and the mounting plate, ensuring the stability of the entire assembly while ensuring long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a lawn mower blade with a protective structure in an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of a local structure in an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the cutting knife in the embodiment of the present utility model;

[0018] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 5 This is a schematic diagram of the split structure of the first fixing ring and the second fixing ring in an embodiment of the present utility model.

[0020] In the figure: 1. Mounting plate; 2. Fixing plate; 3. Cutting knife; 4. Protective assembly; 5. Clamping plate; 6. Movable rod; 7. Spring; 8. First nut; 9. Reinforcement structure; 10. First fixing ring; 11. Second fixing ring; 12. First screw; 13. Clamping rod; 14. Clamping hole; 15. Docking groove; 16. Second screw. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1

[0023] Combine Figure 1-Figure 5 A lawn mower blade with a protective structure includes a mounting plate 1, three fixing plates 2 are fixedly provided on the outer wall of the mounting plate 1, a clamping plate 5 is fixedly provided on the front end of the fixing plate 2, a cutting knife 3 is provided on the front end of the clamping plate 5, a protective component 4 is installed between the clamping plate 5 and the cutting knife 3, and the protective component 4 includes two groups of movable rods 6 fixedly provided at the rear end of the cutting knife 3, a spring 7 is provided on the outer wall of the movable rod 6, the rear end of the movable rod 6 passes through the fixing plate 2 and the outer wall is threaded with a first nut 8.

[0024] See Figure 3 、 Figure 4 and Figure 5 , it is further obtained that the first fixing ring 10 and the second fixing ring 11 are fixedly provided with a clamping rod 13 at one end close to the mounting plate 1, and a clamping hole 14 is provided inside the mounting plate 1 at one end of the clamping rod 13. A rectangular plate is fixedly provided at the rear end of the clamping plate 5, and a rectangular groove is provided at the front end of the fixing plate 2 at the rear end of the rectangular plate. Docking grooves 15 are provided on both sides of the clamping plate 5, and the docking grooves 15 are inserted into the upper and lower ends of the fixing plate 2. A second screw 16 is provided inside the clamping plate 5, and the output end of the second screw 16 passes through the fixing plate 2 and a third nut is provided on the outer wall thread.

[0025] Specifically, the clamping rod 13 is used to ensure the firm connection between the first fixing ring 10 and the fixing plate 2, the clamping hole 14 is used to facilitate the entry of the clamping rod 13, the docking groove 15 is used to be clamped into the upper and lower ends of the fixing plate 2, and the second screw 16 fixes the clamping plate 5 to the front end of the fixing plate 2.

[0026] Example 2

[0027] See Figure 5On the basis of Example 1, it is further obtained that the upper and lower ends of the mounting plate 1 are provided with a reinforcement structure 9, the reinforcement structure 9 includes a first fixing ring 10 and a second fixing ring 11 fixedly provided at the upper end of the mounting plate 1, a first screw 12 is provided inside the first fixing ring 10, and a second nut is provided at the lower end of the second fixing ring 11 at the output end of the first screw 12.

[0028] Specifically, the first fixing ring 10 and the second fixing ring 11 are used to enhance the stability of the fixing plate 2 , and the first screw 12 is used to fix and install the first fixing ring 10 and the second fixing ring 11 .

[0029] During actual operation, when the blade rotates to cut the weeds, if the blade hits a stone, the impact of the cutting knife 3 will drive the movable rod 6 to move backward after contacting the stone, so that the cutting knife 3 squeezes the spring 7 to move backward, thereby reducing the impact force and protecting the cutting knife 3, preventing the cutting knife 3 from breaking directly;

[0030] Place the first fixing ring 10 on the upper end of the fixing plate 2, use the first screw 12 to pass through the first fixing ring 10, then through the fixing plate 2, and finally through the second fixing ring 11, and finally use the third nut to tighten it to enhance the overall stability.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lawn mower blade with a protective structure, comprising a mounting plate (1), wherein three fixing plates (2) are fixedly provided on the outer wall of the mounting plate (1), characterized in that: A clamping plate (5) is fixedly provided at the front end of the fixed plate (2), a cutting knife (3) is provided at the front end of the clamping plate (5), a protective assembly (4) is installed between the clamping plate (5) and the cutting knife (3), the protective assembly (4) comprises two groups of movable rods (6) fixedly provided at the rear end of the cutting knife (3), a spring (7) is provided on the outer wall of the movable rod (6), the rear end of the movable rod (6) passes through the fixed plate (2), and a first nut (8) is provided on the outer wall of the movable rod.

2. The lawn mower blade with a protective structure according to claim 1, characterized in that: The upper and lower ends of the mounting plate (1) are provided with a reinforcement structure (9), and the reinforcement structure (9) comprises a first fixing ring (10) and a second fixing ring (11) fixedly provided at the upper end of the mounting plate (1).

3. The lawn mower blade with a protective structure according to claim 2, characterized in that: A first screw rod (12) is provided inside the first fixing ring (10), and a second nut is provided at the lower end of the second fixing ring (11) at the output end of the first screw rod (12).

4. The lawn mower blade with a protective structure according to claim 3, characterized in that: A clamping rod (13) is fixedly provided at one end of the first fixing ring (10) and the second fixing ring (11) close to the mounting plate (1), and a clamping hole (14) is provided inside the mounting plate (1) at one end of the clamping rod (13).

5. The lawn mower blade with a protective structure according to claim 1, characterized in that: A rectangular plate is fixedly provided at the rear end of the clamping plate (5), and a rectangular groove is provided at the front end of the fixing plate (2) located at the rear end of the rectangular plate.

6. The lawn mower blade with a protective structure according to claim 1, characterized in that: Both sides of the clamping plate (5) are provided with docking grooves (15), which are clamped into the upper and lower ends of the fixed plate (2). A second screw rod (16) is provided inside the clamping plate (5), and the output end of the second screw rod (16) passes through the fixed plate (2) and a third nut is provided on the outer wall of the screw rod.

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