Adjustable grass chopping knife for mower

Abstract

The utility model discloses an adjustable grass chopping knife for a mower, which relates to the technical field of grass chopping knives and comprises a grass chopping knife body. The grass chopper main body comprises blades, a cutter shaft, a cutter holder and an adjusting mechanism; the adjusting mechanism comprises a first hydraulic cylinder, a second hydraulic cylinder, a first limiting piece and a second limiting piece; an output shaft of the first hydraulic cylinder is connected with one end of the cutter shaft; the first limiting piece and the second limiting piece are connected in an inserted mode for limiting. A second hydraulic cylinder, a first limiting piece and a second limiting piece can improve the stability of connection between the cutter shaft and the cutter holder, the cutter shaft, the cutter holder and the first hydraulic cylinder are matched to adjust the positions of the blades, and therefore grass leaves of different heights can be cut, and the cutting effect of the grass chopping cutter is improved; the round cutter body, the arc-shaped cutter body and the sawtooth piece are matched to increase the opportunity of being in contact with grass leaves, the cutting efficiency is improved, cutting force is evenly distributed around the blade, and the service life of the blade is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of grass shredder technology, specifically an adjustable grass shredder for a lawnmower. Background Technology

[0002] A lawnmower is a mechanical device used to trim lawns, gardens or other green spaces. It cuts grass blades with rotating blades to keep the lawn neat and beautiful. The grass shredder is an important component of the lawnmower, mainly responsible for chopping the cut grass blades and distributing them evenly on the lawn. The grass shredder usually consists of blades, a blade shaft, a guard, and fasteners.

[0003] Existing grass shredders have certain drawbacks in use. They are usually fixed to the drive shaft of the lawnmower with fasteners, and the drive shaft drives the grass shredder to rotate and shred the grass. However, the distance between the grass shredder and the grass blades on the ground is fixed, and the blade height cannot be adjusted according to the actual growth of the grass blades. This reduces the cutting effect of the grass shredder and fails to meet people's needs. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes an adjustable grass shredder blade.

[0005] An adjustable lawnmower blade includes: a blade body detachably connected to the lawnmower; wherein the blade body includes blades for shredding grass, a blade shaft detachably mounted on the blades, a blade holder detachably connected to the blade shaft, and an adjustment mechanism disposed inside the blade holder, the adjustment mechanism being capable of adjusting the position of the blades; the adjustment mechanism includes a first hydraulic cylinder detachably mounted on the inner top surface of the blade holder, several sets of second hydraulic cylinders arranged in a circular array on the inner wall of the blade holder, several sets of first limiting members disposed on the outer wall of the blade shaft, and second limiting members detachably connected to the output shaft of the second hydraulic cylinders; the first hydraulic cylinders control the movement of the blade shaft, and the second hydraulic cylinders limit the blade shaft through the first and second limiting members; the output shaft of the first hydraulic cylinder is detachably connected to one end of the blade shaft; the first and second limiting members are inserted and limited.

[0006] As a further embodiment of this utility model: the lower end of the tool holder is provided with a through groove corresponding to the tool shaft, the bottom end of the tool holder is provided with a sealing block connected to the tool shaft, the tool shaft has a cuboid structure, the inner wall of the tool holder is provided with a controller for controlling the opening and closing of the first hydraulic cylinder and the second hydraulic cylinder, the controller is provided with a microcontroller for controlling the synchronous starting of several groups of second hydraulic cylinders, and the controller is set as a Siemens S7 series PLC controller.

[0007] As a further embodiment of this utility model: the first limiting member includes a limiting plate fixedly connected to the outer wall of the cutter shaft and several sets of first limiting blocks installed at equal intervals on the outer surface of the limiting plate.

[0008] As a further embodiment of this utility model: the output shaft of the second hydraulic cylinder is provided with a mounting plate that is detachably connected to the second limiting member. The second limiting member includes a limiting strip that is fixedly connected to the mounting plate and several sets of second limiting blocks that are equally spaced on one side of the limiting strip. The second limiting blocks can be engaged with the first limiting blocks for limiting. The vertical cross-sections of the first limiting block and the second limiting block are both trapezoidal.

[0009] As a further embodiment of this utility model: the tool holder has a cylindrical structure, and the upper end of the tool holder is provided with a sealing cover that is detachably fixed to the first hydraulic cylinder. The sealing cover is installed on the tool holder by bolts.

[0010] As a further embodiment of this utility model: the blade includes a circular blade body and several sets of arc-shaped blade bodies arranged in a circular array on the outside of the circular blade body. Both the circular blade body and the arc-shaped blade bodies are provided with several sets of serrated parts. The combination of the circular blade body and the arc-shaped blade bodies provides multiple cutting edges, increasing the chance of contact with the grass blades, thereby improving cutting efficiency. The serrated blades can cut into the grass blades more easily, especially performing well when dealing with thicker or tougher grass blades. The circular array design of the arc-shaped blade bodies helps to distribute the cutting force evenly around the blades, reducing excessive wear on a certain area.

[0011] As a further embodiment of this utility model: the lawnmower is equipped with a drive motor that controls the rotation of the grass-chopping blade body. The sealing cover is provided with a mounting component connected to the output shaft of the drive motor. The mounting component is provided with a mounting rod for fixing the output shaft of the drive motor. The mounting component is provided with a mounting groove for connecting to the output shaft of the drive motor. The output shaft of the drive motor is provided with a mounting block, and the mounting block has a mounting hole for connecting to the mounting rod.

[0012] As a further embodiment of this utility model: the bottom end of the cutter shaft is provided with a fixing block connected to the circular cutter body, and one side of the circular cutter body is provided with a locking block connected to the fixing block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) The present invention improves the stability of the connection between the blade shaft and the blade holder by setting the blade body, the second hydraulic cylinder, the first limiting part and the second limiting part. The blade shaft, the blade holder and the first hydraulic cylinder can adjust the position of the blade, thereby enabling the cutting of grass blades of different heights and improving the cutting effect of the blade. The circular blade body, the arc blade body and the serrated part increase the chance of contact with the grass blades, improve the cutting efficiency and distribute the cutting force evenly around the blade, and improve the service life of the blade. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0016] Figure 2 This is a partial structural diagram of the adjustment mechanism in this utility model.

[0017] Figure 3 This is a partial structural diagram of the first and second limiting members in this utility model.

[0018] Figure 4 This is a partial structural diagram of the blade and blade holder in this utility model.

[0019] In the diagram: 1. Blade; 2. Cutter shaft; 3. Cutter holder; 4. First hydraulic cylinder; 5. Second hydraulic cylinder; 6. First limiting component; 7. Second limiting component; 8. Controller; 9. Limiting plate; 10. First limiting block; 11. Mounting plate; 12. Limiting strip; 13. Second limiting block; 14. Sealing cover; 15. Circular cutter body; 16. Arc-shaped cutter body; 17. Serrated component; 18. Mounting component; 19. Mounting rod; 20. Fixing block; 21. Locking block. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Example 1

[0022] Please see Figure 1 - Figure 3This application provides an adjustable grass shredder blade, comprising: a grass shredder blade body detachably connected to the lawnmower; wherein, the grass shredder blade body includes a blade 1 for shredding grass, a blade shaft 2 detachably mounted on the blade 1, a blade holder 3 detachably connected to the blade shaft 2, and an adjustment mechanism disposed inside the blade holder 3, the adjustment mechanism being capable of adjusting the position of the blade 1; the adjustment mechanism includes a first hydraulic cylinder 4 detachably mounted on the inner top surface of the blade holder 3, several sets of second hydraulic cylinders 5 arranged in a circular array on the inner wall of the blade holder 3, several sets of first limiting members 6 disposed on the outer wall of the blade shaft 2, and second limiting members 7 detachably connected to the output shaft of the second hydraulic cylinders 5, the first hydraulic cylinder 4 controlling the movement of the blade shaft 2, and the second hydraulic cylinders 5 limiting the blade shaft 2 through the first limiting members 6 and the second limiting members 7; the output shaft of the first hydraulic cylinder 4 is detachably connected to one end of the blade shaft 2; the first limiting members 6 and the second limiting members 7 are inserted and limited.

[0023] In this embodiment, the lower end of the blade holder 3 is provided with a through groove corresponding to the blade shaft 2, and the bottom end of the blade holder 3 is provided with a sealing block connected to the blade shaft 2. The blade shaft 2 has a cuboid structure. The inner wall of the blade holder 3 is provided with a controller 8 that controls the opening and closing of the first hydraulic cylinder 4 and the second hydraulic cylinder 5. The lawnmower is provided with a control button connected to the controller 8. The controller 8 is provided with a microcontroller that controls several groups of second hydraulic cylinders 5 to start synchronously. The controller 8 is set as a Siemens S7 series PLC controller.

[0024] In this embodiment, the first limiting member 6 includes a limiting plate 9 fixedly connected to the outer wall of the cutter shaft 2 and several sets of first limiting blocks 10 installed at equal intervals on the outer surface of the limiting plate 9.

[0025] In this embodiment, the output shaft of the second hydraulic cylinder 5 is provided with a mounting plate 11 that is detachably connected to the second limiting member 7. The second limiting member 7 includes a limiting strip 12 that is fixedly connected to the mounting plate 11 and several sets of second limiting blocks 13 that are equally spaced on one side of the limiting strip 12. The second limiting blocks 13 can be engaged with the first limiting block 10 for limiting. The vertical cross-sections of the first limiting block 10 and the second limiting block 13 are both trapezoidal.

[0026] In this embodiment, the tool holder 3 has a cylindrical structure. The upper end of the tool holder 3 is provided with a sealing cover 14 that is detachably fixed to the first hydraulic cylinder 4. The sealing cover 14 is installed on the tool holder 3 by bolts.

[0027] In summary, when the main body of the grass shredder is installed on the lawnmower, and adjustment of the main body is required, the second hydraulic cylinder 5 is activated, causing the second limiting member 7 to separate from the first limiting member 6. The first hydraulic cylinder 4 is activated, causing the blade shaft 2 to move. The blade shaft 2 moves several sets of first limiting blocks 10 through the limiting plate 9, and the blade shaft 2 moves the blade 1 to adjust its position. The second hydraulic cylinder 5 is activated, causing the mounting plate 11 to move. The mounting plate 11 moves the limiting strip 12, and the limiting strip 12 moves the second limiting block 13, thereby engaging and limiting the several sets of second limiting blocks 13 with the several sets of first limiting blocks 10, thus fixing and limiting the blade shaft 2.

[0028] Example 2

[0029] Reference Figure 1 and Figure 4 This is the second embodiment of the present invention. In this embodiment, the blade 1 includes a circular blade body 15 and several sets of arc-shaped blade bodies 16 arranged in a circular array outside the circular blade body 15. Both the circular blade body 15 and the arc-shaped blade bodies 16 are provided with several sets of serrated parts 17. The combination of the circular blade body 15 and the arc-shaped blade bodies 16 provides multiple cutting edges, increasing the chance of contact with the grass blades, thereby improving cutting efficiency. The serrated blade 1 can cut into the grass blades more easily, especially when dealing with thicker or tougher grass blades. The circular array design of the arc-shaped blade bodies 16 helps to distribute the cutting force evenly around the blade 1, reducing excessive wear on a certain area.

[0030] In this embodiment, the lawnmower is equipped with a drive motor that controls the rotation of the grass-chopping blade body. The sealing cover 14 is provided with a mounting part 18 that is connected to the output shaft of the drive motor. The mounting part 18 is provided with a mounting rod 19 for fixing the output shaft of the drive motor. The mounting part 18 is provided with a mounting groove that is connected to the output shaft of the drive motor. The output shaft of the drive motor is provided with a mounting block, and the mounting block has a mounting hole that is connected to the mounting rod 19.

[0031] In this embodiment, the bottom end of the cutter shaft 2 is provided with a fixing block 20 connected to the circular cutter body 15, the circular cutter body 15 is provided with a fixing hole connected to the fixing block 20, and one side of the circular cutter body 15 is provided with a locking block 21 connected to the fixing block 20.

[0032] In summary, the fixing block 20 and locking block 21 fix the circular blade 15 to the blade shaft 2, connect the output shaft of the drive motor to the mounting part 18, and the mounting rod 19 fixes the output shaft of the drive motor through the mounting block. When the drive motor is started, the mounting part 18 is rotated, the mounting part 18 rotates the blade holder 3, the blade holder 3 rotates the blade shaft 2, the blade shaft 2 rotates the circular blade 15, the circular blade 15 rotates the arc-shaped blade 16, and the circular blade 15 and the arc-shaped blade 16 rotate the saw tooth part 17 to perform grass chopping.

[0033] Example 3

[0034] Reference Figure 1 - Figure 4 This embodiment is obtained by combining Embodiment 1 and Embodiment 2.

[0035] The fixing block 20 and locking block 21 fix the blade 1. The mounting part 18 and mounting rod 19 fix the blade holder 3 to the lawnmower. The circular blade body 15, the arc-shaped blade body 16 and the serrated part 17 work together to chop grass. The blade shaft 2, the first hydraulic cylinder 4, the first limiting part 6, the second hydraulic cylinder 5 and the second limiting part 7 control the blade 1 to adjust its position.

[0036] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. An adjustable lawnmower blade, characterized in that, include: The main body of the grass-shredding blade can be detachably connected to the lawnmower; The grass-chopping knife body includes a blade (1) for chopping grass, a blade shaft (2) detachably mounted on the blade (1), a blade holder (3) detachably connected to the blade shaft (2), and an adjustment mechanism disposed inside the blade holder (3); The adjustment mechanism includes a first hydraulic cylinder (4) detachably mounted on the inner top surface of the tool holder (3), several sets of second hydraulic cylinders (5) arranged in a circular array on the inner wall of the tool holder (3), several sets of first limiting members (6) arranged on the outer wall of the tool shaft (2), and a second limiting member (7) detachably connected to the output shaft of the second hydraulic cylinder (5); The output shaft of the first hydraulic cylinder (4) is detachably connected to one end of the cutter shaft (2); The first limiting member (6) and the second limiting member (7) are inserted and limited.

2. The adjustable lawnmower blade according to claim 1, characterized in that, The lower end of the tool holder (3) is provided with a through groove corresponding to the tool shaft (2). The tool shaft (2) has a cuboid structure. The inner wall of the tool holder (3) is provided with a controller (8) for controlling the opening and closing of the first hydraulic cylinder (4) and the second hydraulic cylinder (5).

3. An adjustable lawnmower blade according to claim 2, characterized in that, The first limiting member (6) includes a limiting plate (9) fixedly connected to the outer wall of the cutter shaft (2) and several sets of first limiting blocks (10) installed at equal intervals on the outer surface of the limiting plate (9).

4. An adjustable lawnmower blade according to claim 3, characterized in that, The output shaft of the second hydraulic cylinder (5) is provided with a mounting plate (11) that is detachably connected to the second limiting member (7). The second limiting member (7) includes a limiting strip (12) that is fixedly connected to the mounting plate (11) and several sets of second limiting blocks (13) that are equally spaced on one side of the limiting strip (12). The second limiting block (13) can be engaged with the first limiting block (10) for limiting.

5. An adjustable lawnmower blade according to claim 1, characterized in that, The tool holder (3) has a cylindrical structure, and the upper end of the tool holder (3) is provided with a sealing cover (14) that is detachably fixed to the first hydraulic cylinder (4).

6. An adjustable lawnmower blade according to claim 5, characterized in that, The blade (1) includes a circular blade body (15) and several sets of arc-shaped blade bodies (16) arranged in a circular array outside the circular blade body (15). Both the circular blade body (15) and the arc-shaped blade bodies (16) are provided with several sets of serrated parts (17).

7. An adjustable lawnmower blade according to claim 5, characterized in that, The lawnmower is equipped with a drive motor that controls the rotation of the grass-chopping blade body. The sealing cover (14) is equipped with a mounting part (18) that is connected to the output shaft of the drive motor. The mounting part (18) is equipped with a mounting rod (19) for fixing the output shaft of the drive motor.

8. An adjustable lawnmower blade according to claim 6, characterized in that, The bottom end of the cutter shaft (2) is provided with a fixing block (20) connected to the circular cutter body (15), and one side of the circular cutter body (15) is provided with a locking block (21) connected to the fixing block (20).

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