Straight strip type mowing machine cutter head

Abstract

The utility model discloses a straight strip type mowing machine cutterhead, which belongs to the field of mowing machine cutterheads and comprises a first straight strip blade and a second straight strip blade positioned below the first straight strip blade, a connecting rod is welded on a protective head, and a vertical block is fixedly mounted at the bottom of the outer surface of the second straight strip blade. And the vertical block and the connecting rod are rotationally connected through a grinding assembly in the vertical block. The protective head is arranged, stuck grass is separated through the comb-shaped structure of the protective head, after the grass is separated, large soil blocks can fall down, only small soil blocks are left, then the small soil blocks are cut off by the first straight blade and the second straight blade, damage to the cutter head of the mower is reduced, and if stone exists in the grass, the cutter head can be cut off by the first straight blade and the second straight blade. The stone can be combed to the position between the protection head and the second straight blade by the comb-shaped protection head, the protection head can separate soil blocks from grass in advance before the first straight blade and the second straight blade make contact with the soil blocks, and therefore the protection effect of the protection head on the first straight blade and the second straight blade is achieved.

Description

Technical Field

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

[0002] A straight mower deck is a common type of mower deck that consists of one or more straight blades, which are usually mounted on a rotating horizontal axis and cut the grass blades as the deck rotates.

[0003] During the use of the existing straight-bar mower blade, the blade is sharp and has a better mowing effect. However, if there is dirt or stones in the grass, the blade will collide with the blade, causing damage to the blade and reducing the mowing effect. Summary of the invention

[0004] The utility model aims to provide a lawn mower blade, which can solve the problem that if there is dirt or stones in the grass during the mowing process, the lawn mower blade will collide with the blade head, causing damage to the blade head and reduced mowing effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a straight-bar type lawn mower blade disc, comprising a first straight-bar blade and a second straight-bar blade located below the first straight-bar blade, the first straight-bar blade and the second straight-bar blade both being provided with mounting grooves, the mounting grooves being provided with first screws and first nuts for fixing the first straight-bar blade and the second straight-bar blade, the first screw being threadedly connected to the first nut, the second straight-bar blade being fixedly provided with a mounting head for mounting the first straight-bar blade and the second straight-bar blade on the lawn mower, a protective head being provided below the second straight-bar blade, a connecting rod being welded on the protective head, a vertical block being fixedly installed on the bottom of the outer surface of the second straight-bar blade, the vertical block and the connecting rod being rotatably connected through a crushing assembly inside the vertical block.

[0006] Preferably, a contraction groove running through both sides is opened inside the vertical block, and the crushing assembly includes a coil spring and a sleeve arranged in the contraction groove, the coil spring is used to elastically connect the sleeve and the inner wall of the contraction groove, and the interior of the sleeve is fixed with a second screw, which passes through the sleeve and extends to the outside of the sleeve to be threadedly installed with a second nut.

[0007] Preferably, a first limit block is welded to one end of the vertical block close to the protective head, and the first limit block can limit the connecting rod and can control the connecting rod to maintain an angle of thirty degrees with the horizontal plane.

[0008] Preferably, two groups of second limit blocks are fixedly installed at the bottom of the second straight blade, and the two groups of second limit blocks are located at the edge of the second straight blade. The two groups of second limit blocks are symmetrically arranged, and the two groups of second limit blocks can limit the protective head so that the protective head does not contact the protective head when the protective head maintains an angle of thirty degrees with the horizontal plane and is two centimeters away from the protective head.

[0009] Preferably, the protective head is a comb-shaped structure, and the width of the protective head is greater than the width of the first straight blade and the second straight blade.

[0010] Preferably, a threaded hole for threadedly installing a second screw is provided inside the sleeve.

[0011] Preferably, the spacing between the comb-like structures of the protective head is no greater than one centimeter.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The present application sets a protective head, and its comb-like structure separates the stuck grass. After the grass is separated, large pieces of soil will fall down, leaving only small pieces of soil, which will then be cut by the first straight blade and the second straight blade, thereby reducing damage to the mower head. If there are stones in the grass, the stones will be combed between the protective head and the second straight blade by the comb-like protective head. Before the first straight blade and the second straight blade contact the soil, the protective head can separate the soil from the grass in advance, thereby realizing the protective effect of the protective head on the first straight blade and the second straight blade.

[0014] 2. The present application sets a crushing assembly and a protective head. The protective head contacts the grass and is under pressure, so that it is flipped upward through the connecting rod and forms an angle of thirty degrees with the horizontal plane. When encountering clods of earth, the clods of earth are pressed down to prevent the clods of earth and stones from contacting the first straight blade and the second straight blade. Even if stones are encountered, the stones will be pushed away. Large clods of earth will generate a rebound force when the coil spring contracts, and the protective head presses the clods down in the opposite direction. The clods of earth are ground into small pieces during the movement of the lawn mower, and the clods of earth that enter the position between the second straight blade and the protective head will be retained. When the lawn mower stops, the coil spring rebounds, the protective head is reset, and the clods of earth can be cleared, further ensuring the protective effect of the protective head on the first straight blade and the second straight blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is the overall structural view of the utility model;

[0017] Figure 2 It is a top view of the protective head of the utility model;

[0018] Figure 3 A bottom view of a first straight blade and a second straight blade of the utility model;

[0019] Figure 4 For the utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 5 An exploded view of the crushing assembly of the present invention;

[0021] Figure 6 For the utility model Figure 3 Enlarged view of point B in the middle.

[0022] Description of reference numerals:

[0023] 1. The first straight blade; 2. The second straight blade; 3. The mounting groove; 4. The first screw; 5. The first nut; 6. The mounting head; 7. The protective head; 8. The connecting rod; 9. The vertical block; 10. The crushing assembly; 11. The contraction groove; 12. The coil spring; 13. The sleeve; 14. The second nut; 15. The second screw; 16. The threaded hole; 17. The first limit block; 18. The second limit block. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figures 1 to 6 , the utility model provides a technical solution:

[0026] A straight-strip lawn mower blade disc comprises a first straight blade 1 and a second straight blade 2 located below the first straight blade 1. The first straight blade 1 and the second straight blade 2 are both provided with a mounting groove 3. A first screw 4 and a first nut 5 for fixing the first straight blade 1 and the second straight blade 2 are provided in the mounting groove 3. The first screw 4 is threadedly connected with the first nut 5. A mounting head 6 for mounting the first straight blade 1 and the second straight blade 2 on the lawn mower is fixedly provided on the second straight blade 2. A protective head 7 is provided below the second straight blade 2. A connecting rod 8 is welded to the protective head 7. A vertical block 9 is fixedly installed at the bottom of the outer surface of the second straight blade 2. A crushing assembly 10 inside the vertical block 9 is rotatably connected between the vertical block 9 and the connecting rod 8.

[0027] The protective head 7 is a comb-shaped structure, and the width of the protective head 7 is greater than the width of the first straight blade 1 and the second straight blade 2 .

[0028] The spacing between the comb-like structures of the protective head 7 is no greater than one centimeter.

[0029] By adopting the above technical solution, when the lawn mower is mowing the grass, for the grass stuck by the clods of soil, the protective head 7 will first contact the grass that is stuck, and separate the stuck grass through its comb-like structure. After the grass is separated, the large clods of soil will fall down, leaving only small clods of soil, which will then be cut off by the first straight blade 1 and the second straight blade 2, thereby reducing the damage to the mower head. If there are stones in the grass, the stones will be combed by the comb-like protective head 7 between the protective head 7 and the second straight blade 2, so that the protective head 7 can separate the clods of soil from the grass in advance before the first straight blade 1 and the second straight blade 2 contact the clods of soil, thereby realizing the protective effect of the protective head 7 on the first straight blade 1 and the second straight blade 2.

[0030] Specifically, Figures 1 to 6 As shown, the interior of the vertical block 9 is provided with a contraction groove 11 running through both sides, and the crushing assembly 10 includes a coil spring 12 and a sleeve 13 arranged in the contraction groove 11. The coil spring 12 is used to elastically connect the sleeve 13 and the inner wall of the contraction groove 11. The interior of the sleeve 13 is fixedly sleeved with a second screw 15, which passes through the sleeve 13 and extends to the outside of the sleeve 13 to be threadedly mounted with a second nut 14.

[0031] A first limit block 17 is welded to one end of the vertical block 9 close to the protective head 7. The first limit block 17 can limit the connecting rod 8 and can control the connecting rod 8 to maintain an angle of thirty degrees with the horizontal plane.

[0032] Two sets of second limit blocks 18 are fixedly installed at the bottom of the second straight blade 2, and the two sets of second limit blocks 18 are located at the edge of the second straight blade 2. The two sets of second limit blocks 18 are symmetrically arranged. The two sets of second limit blocks 18 can limit the protective head 7 so that the protective head 7 does not contact the protective head 7 and is two centimeters away from the protective head 7 when the protective head 7 maintains an angle of thirty degrees with the horizontal plane.

[0033] A threaded hole 16 for threadedly mounting the second screw 15 is formed inside the sleeve 13 .

[0034] By adopting the above technical solution, when the lawn mower mows at a faster speed, the guard head 7 contacts the grass and is subjected to pressure, thereby flipping up through the connecting rod 8. When flipping up, it will maintain a thirty-degree angle with the horizontal plane due to the action of the first limit block 17, and is fixedly connected to the sleeve 13 through the second screw 15 and the second nut 14. At this time, the second screw 15, the second nut 14 and the sleeve 13 are a relatively fixed whole, and then they will rotate with the sleeve 13, so that the coil spring 12 fixedly connected to the sleeve 13 shrinks in the contraction groove 11, and the vertical block 9 is fixed relative to the guard head 7, thereby achieving the effect of the guard head 7 flipping up when it contacts the grass. In order to avoid the situation where the guard head 7 contacts the second straight blade 2 and damages the second straight blade 2 when flipping up, at this time The comb-shaped part of the protective head 7 will contact the second limit block 18, thereby maintaining a distance of two centimeters from the second straight blade 2. When the protective head 7 is turned up and maintained at a thirty-degree angle with the horizontal plane, it will press down the clod when encountering it, to prevent the clod and stone from contacting the first straight blade 1 and the second straight blade 2. Even if it encounters a stone, it will push the stone away. The large clod will generate a rebound force when the coil spring 12 contracts. The protective head 7 presses the clod downward in the opposite direction, and the clod is ground into small pieces during the movement of the lawn mower. The clod that enters the position between the second straight blade 2 and the protective head 7 will be retained. When the lawn mower stops, the coil spring 12 rebounds, the protective head 7 is reset, and the clod can be cleared, further ensuring the protective effect of the protective head 7 on the first straight blade 1 and the second straight blade 2.

[0035] Working principle: When the lawn mower is mowing the grass, for the grass stuck by clods of soil, the protective head 7 will first contact the part of the grass that is stuck, and separate the stuck grass through its comb-like structure. After the grass is separated, large clods of soil will fall down, leaving only small clods of soil, which will then be cut off by the first straight blade 1 and the second straight blade 2, reducing damage to the mower head. If there are stones in the grass, the stones will be combed by the comb-like protective head 7 between the protective head 7 and the second straight blade 2, so that the protective head 7 can separate the clods of soil from the grass in advance before the first straight blade 1 and the second straight blade 2 contact the clods of soil, thereby realizing the protective effect of the protective head 7 on the first straight blade 1 and the second straight blade 2.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A blade disc of a straight-strip mower, comprising a first straight blade (1) and a second straight blade (2) located below the first straight blade (1), wherein the first straight blade (1) and the second straight blade (2) are both provided with a mounting groove (3), wherein the mounting groove (3) is provided with a first screw (4) and a first nut (5) for fixing the first straight blade (1) and the second straight blade (2), wherein the first screw (4) is threadedly connected to the first nut (5), and the second straight blade (2) is fixedly provided with a mounting head (6) for mounting the first straight blade (1) and the second straight blade (2) on the mower, characterized in that: A protective head (7) is arranged below the second straight blade (2), a connecting rod (8) is welded to the protective head (7), a vertical block (9) is fixedly installed at the bottom of the outer surface of the second straight blade (2), and the vertical block (9) and the connecting rod (8) are rotatably connected through a crushing component (10) inside the vertical block (9).

2. A straight mower blade according to claim 1, characterized in that: The vertical block (9) is provided with a contraction groove (11) running through both sides. The crushing assembly (10) comprises a coil spring (12) and a sleeve (13) arranged in the contraction groove (11). The coil spring (12) is used to elastically connect the sleeve (13) and the inner wall of the contraction groove (11). The sleeve (13) is provided with a second screw (15) fixedly sleeved inside. The second screw (15) passes through the sleeve (13) and extends to the outside of the sleeve (13) to be threadedly mounted with a second nut (14).

3. A straight mower blade according to claim 2, characterized in that: A first limiting block (17) is welded to one end of the vertical block (9) close to the protective head (7); the first limiting block (17) can limit the connecting rod (8) and can control the connecting rod (8) to maintain an angle of thirty degrees with the horizontal plane.

4. A straight mower blade according to claim 3, characterized in that: Two groups of second limit blocks (18) are fixedly installed at the bottom of the second straight blade (2), and the two groups of second limit blocks (18) are located at the edge of the second straight blade (2). The two groups of second limit blocks (18) are symmetrically arranged, and the two groups of second limit blocks (18) can limit the protective head (7) so that the protective head (7) does not contact the protective head (7) when the protective head (7) maintains an angle of thirty degrees with the horizontal plane, and is two centimeters away from the protective head (7).

5. A straight mower blade according to claim 4, characterized in that: The protective head (7) is a comb-shaped structure, and the width of the protective head (7) is greater than the width of the first straight blade (1) and the second straight blade (2).

6. A straight mower blade according to claim 5, characterized in that: The sleeve (13) is provided with a threaded hole (16) for threadedly mounting a second screw (15).

7. A straight mower blade according to claim 6, characterized in that: The spacing between the comb-like structures of the protective head (7) is no greater than one centimeter.

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