Protective body of rotary cutter of brush cutter

Abstract

The utility model discloses a protection body of a rotating cutter of a brush cutter, which comprises a shell, an L-shaped fixer and a disc, the inside of the L-shaped fixer is sequentially provided with a meshing groove and a lifting groove from top to bottom, the inner wall of the meshing groove is rotatably connected with a rotating rod through a bearing, one end of the rotating rod is provided with a driving bevel gear, and the other end of the rotating rod is provided with a driving bevel gear; the other end of the rotating rod is provided with a rotating button, and the inner wall of the lifting groove is rotationally connected with a threaded rod through a bearing. The rotating button drives the rotating rod to rotate, the rotating rod drives the driving bevel gear to rotate, the driving bevel gear is in meshing transmission with the driven bevel gear, the driven bevel gear drives the threaded rod to rotate, the lifting block moves on the threaded rod, the lifting block drives the disc to move, and the function of adjusting the height of the rotating cutter is achieved. And meanwhile, the rotary cutter can cut out shrubs of different heights, and the disc drives the round rod to move.

Description

Technical Field

[0001] The utility model relates to the technical field of brush cutters, in particular to a protective body for a rotary knife of a brush cutter. Background Art

[0002] Brush cutters are also called weed cutters, lawn mowers, lawn trimmers, etc. A lawn mower is a mechanical tool used to trim lawns, vegetation, etc. It consists of a cutter disc, an engine, a running wheel, a running mechanism, a blade, an armrest, and a control part; the cutter disc is mounted on the running wheel, the engine is mounted on the cutter disc, and the blade is mounted on the output shaft of the engine. The blade uses the high-speed rotation of the engine to increase the speed a lot, which saves the working time of weeding workers and reduces a lot of human resources.

[0003] For example, a portable brush cutter with an authorization announcement number of CN212629223U and an announcement date of 2021.03.02 includes a vertically arranged motor, a transmission mechanism is arranged below the motor, the transmission mechanism is fixedly connected to the main shaft of the motor, a blade is fixedly connected to the lower end of the transmission mechanism, a baffle is arranged above the blade, an operating rod is hinged to the transmission mechanism, an angle adjustment device is arranged between the operating rod and the baffle, an armrest is fixedly connected to the operating rod, an operating panel is arranged on the armrest, a support assembly is connected to the operating rod, a waist fixing assembly is connected to the end of the support assembly away from the operating rod, a shoulder fixing assembly is connected to the end of the operating rod away from the transmission mechanism, and rolling assemblies are respectively connected to the two side walls of the baffle.

[0004] When using a brush cutter, some bushes are distributed on the roadside. Since the rotary cutter rotates at a high speed, the worker needs to pay attention to the rotary cutter to avoid collision with the curbstone or wall on the roadside, which may cause the rotary cutter to curl or be damaged. When the rotary cutter is damaged, it will affect the worker's work of cutting the bushes. Therefore, it is urgent to design a protective body for the rotary cutter of the brush cutter to solve the above problem. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a protective body for a rotary knife of a brush cutter.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A protective body for a rotary knife of a brush cutter comprises a shell, an L-shaped fixture and a disc, wherein a meshing groove and a lifting groove are sequentially provided inside the L-shaped fixture from top to bottom, and a rotating rod is rotatably connected to the inner wall of the meshing groove via a bearing, an active bevel gear is provided at one end of the rotating rod, and a knob is provided at the other end of the rotating rod, a threaded rod is rotatably connected to the inner wall of the lifting groove via a bearing, and a driven bevel gear is provided at one end of the threaded rod, the outer part of the active bevel gear is meshed with the driven bevel gear, a sliding groove is provided on the outer wall of the top of the disc, and a round rod is slidably connected to the inner part of the sliding groove, and a lifting block is provided on the outer wall of one side of the disc.

[0008] Furthermore, a slot is provided on the outer wall of one side of the L-shaped fixer, and a slot is provided on the inner wall of the slot. A limiter is provided on the outer wall of one side of the L-shaped fixer, and the limiter is internally slidably connected to the limit rod.

[0009] Furthermore, a limiting friction block is provided at one end of the limiting rod, and a limiting spring is connected to the inner wall of the limiter on the outer wall of the limiting rod, a concave friction ring is sleeved on the outer wall of the turning knob, an insert rod is inserted into the inside of the slot, and a fixing nut is provided on the inner wall of the slot.

[0010] Furthermore, a fixing block is provided on the outer wall of one side of the shell, and the fixing block is clamped in the inside of the clamping slot, the insertion rod passes through the inside of the fixing block, and the insertion rod is threadedly inserted in the inside of the fixing nut.

[0011] Furthermore, a limit hanging ear is arranged on the outer wall of the top of the disc, and the inside of the limit hanging ear is connected with the round rod through and through, and a limit block is arranged on the outer wall of the round rod, and the limit block is clamped in the inside of the sliding groove.

[0012] Furthermore, a motor is arranged on the inner wall of the shell, and an output rod is arranged on the output shaft of the motor, an anti-entanglement sleeve is arranged on the outer wall of the bottom of the motor, and a long rod is rotatably connected to the outer wall of the motor via a rotating shaft.

[0013] Furthermore, knife rods are arranged on both sides of the output rod, and a long grass-stripping arm is arranged on the outer wall of the top of the knife rod, and a blade is arranged at one end of the knife rod away from the output rod.

[0014] The beneficial effects of the utility model are:

[0015] 1. Through the setting of the knob, rotating rod, active bevel gear, driven bevel gear, threaded rod, lifting block, disc and round rod, the knob drives the rotating rod to rotate, the rotating rod drives the active bevel gear to rotate, the active bevel gear and the driven bevel gear are meshed for transmission, the driven bevel gear drives the threaded rod to rotate, the lifting block moves on the threaded rod, and the lifting block drives the disc to move, thereby realizing the function of adjusting the height of the rotary knife to prevent the rotary knife from contacting the bottom surface or the stone is too high so that the rotary knife collides with it and rolls the blade, and at the same time enables the rotary knife to cut shrubs of different heights. The disc drives the round rod to move, and the length of the round rod exceeds the blade to prevent the rotary knife from contacting the curbstone and wall on the roadside when rotating at high speed, causing the rotary knife to roll or be damaged, thereby realizing the function of protecting the rotary knife.

[0016] 2. Through the L-shaped fixer, card slot, slot, plug rod, fixing nut, fixing block, limit ear, sliding slot and limit block, the round rod is inserted in the limit ear for movement, and the limit block is connected in the sliding slot, thereby realizing the function of disassembling and assembling the round rod, the fixing block is connected in the card slot, the plug rod is inserted in the slot, and the plug rod is connected in the fixing nut, thereby realizing the function of disassembling and assembling the L-shaped fixer, so that the staff can conveniently dismantle and maintain the components.

[0017] 3. By setting up the anti-entanglement sleeve, knife bar and grass-throwing long arm, the knife bar drives the grass-throwing long arm to rotate, and the rotation of the grass-throwing long arm forms a protective circle, which realizes the function of preventing the cut grass from being entangled with the output shaft, and avoids the problem of increasing the rotation resistance of the rotating knife due to the entanglement groove and thus increasing the energy loss of mowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a protective body of a rotary blade of a brush cutter proposed by the utility model;

[0019] Figure 2 It is a side cross-sectional structural schematic diagram of a protective body of a rotary blade of a brush cutter proposed by the utility model;

[0020] Figure 3 This is a schematic diagram of a top view of a cross-sectional structure of a disc of a protective body of a rotary blade of a brush cutter proposed by the utility model;

[0021] Figure 4 This is a cross-sectional enlarged structural schematic diagram of an L-shaped fixing device of a protective body of a rotary blade of a brush cutter proposed by the utility model;

[0022] Figure 5 It is a cross-sectional enlarged structural schematic diagram of a plug rod of a protective body of a rotary blade of a brush cutter proposed by the utility model;

[0023] Figure 6 The utility model is a schematic diagram of an enlarged cross-sectional structure of a round rod of a protective body of a rotary blade of a brush cutter.

[0024] In the figure: 1. housing; 2. motor; 3. output rod; 4. L-shaped holder; 5. meshing groove; 6. knob; 7. rotating rod; 8. active bevel gear; 9. lifting groove; 10. threaded rod; 11. driven bevel gear; 12. lifting block; 13. disc; 14. round rod; 15. slot; 16. slot; 17. plug rod; 18. fixing nut; 19. fixing block; 20. sliding groove; 21. limit block; 22. limit hanging ear; 23. anti-entanglement sleeve; 24. long arm for removing grass; 25. knife rod; 26. blade; 27. long rod; 28. limiter; 29. ​​limit rod; 30. limit friction block; 31. concave friction ring; 32. limit spring. DETAILED DESCRIPTION

[0025] 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.

[0026] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] Reference Figure 1-6A protective body for a rotary knife of a brush cutter comprises a shell 1, an L-shaped fixture 4 and a disc 13. The interior of the L-shaped fixture 4 is provided with a meshing groove 5 and a lifting groove 9 in sequence from top to bottom, and a rotating rod 7 is rotatably connected to the inner wall of the meshing groove 5 through a bearing, an active bevel gear 8 is provided at one end of the rotating rod 7, and a knob 6 is provided at the other end of the rotating rod 7. A threaded rod 10 is rotatably connected to the inner wall of the lifting groove 9 through a bearing, and a driven bevel gear 11 is provided at one end of the threaded rod 10. The outer side of the active bevel gear 8 is meshed with the driven bevel gear 11. A sliding groove 20 is provided on the outer wall of the top of the disc 13, and a round rod 14 is slidably connected to the inside of the sliding groove 20. A lifting block 12 is provided on the outer wall of one side of the disc 13, and the round rod 14 is plugged into the inside of the sliding groove 20, thereby realizing the function of limiting the round rod 14.

[0029] In one embodiment provided by the present utility model, Figure 2 and Figure 5 As shown, a slot 15 is provided on the outer wall of one side of the L-shaped fixer 4, and a slot 16 is provided on the inner wall of the slot 15. A limiter 28 is provided on the outer wall of one side of the L-shaped fixer 4, and the inner sliding connection of the limiter 28 is connected to a limit rod 29. The fixing block 19 is clamped in the inner part of the slot 15, thereby realizing the function of limiting the fixing block 19.

[0030] In another embodiment provided by the present utility model, Figure 2 and Figure 5 As shown, a limiting friction block 30 is provided at one end of the limiting rod 29, and a limiting spring 32 is connected to the inner wall of the limiter 28 on the outer wall of the limiting rod 29, a concave friction ring 31 is sleeved on the outer wall of the knob 6, an insert rod 17 is inserted into the interior of the slot 16, and a fixing nut 18 is provided on the inner wall of the slot 16, and the insert rod 17 is threadedly connected to the interior of the fixing nut 18, thereby realizing the function of fixing the L-shaped fixer 4.

[0031] In another embodiment provided by the present utility model, Figure 5 As shown, a fixing block 19 is provided on the outer wall of one side of the shell 1, and the fixing block 19 is clamped in the inside of the clamping groove 15, the insertion rod 17 passes through the inside of the fixing block 19, and the insertion rod 17 is threadedly inserted in the inside of the fixing nut 18, and the insertion rod 17 passes through the slot 16, thereby realizing the limit sealing function of the insertion rod 17.

[0032] In one embodiment provided by the present utility model, Figure 6 As shown, a limit lug 22 is provided on the outer wall of the top of the disc 13, and the interior of the limit lug 22 is connected with the round rod 14 through and through, a limit block 21 is provided on the outer wall of the round rod 14, and the limit block 21 is clamped in the interior of the sliding groove 20, and the round rod 14 is rotated, and the round rod 14 drives the limit block 21 to rotate, and the limit block 21 is clamped in the sliding groove 20, thereby realizing the function of limiting the round rod 14.

[0033] In another embodiment provided by the present utility model, Figure 1 and Figure 2 As shown, a motor 2 is arranged on the inner wall of the outer shell 1, and an output rod 3 is arranged on the output shaft of the motor 2, an anti-entanglement sleeve 23 is arranged on the outer wall of the bottom of the motor 2, and a long rod 27 is rotatably connected to the outer wall of the motor 2 through a rotating shaft, and an anti-entanglement sleeve 23 is arranged at the bottom of the motor 2 to prevent dust and grass seeds from entering the output rod 3.

[0034] In another embodiment provided by the present utility model, Figure 1 As shown, a knife bar 25 is provided on both sides of the output rod 3, and a grass-flicking long arm 24 is provided on the outer wall of the top of the knife bar 25. A blade 26 is provided at the end of the knife bar 25 away from the output rod 3. The knife bar 25 drives the grass-flicking long arm 24, and the grass-flicking long arm 24 rotates at a high speed to form a protective ring, thereby preventing the cut grass from being entangled on the output shaft.

[0035] Working principle: when in use, pull out the plug rod 17, move the L-shaped fixer 4, the fixing block 19 is clamped in the clamping groove 15, the plug rod 17 moves in the slot 16, the plug rod 17 passes through the fixing block 19, the plug rod 17 is threadedly engaged with the fixing nut 18, and the function of installing the L-shaped fixer 4 on the housing 1 is realized, which is convenient for the staff to disassemble and assemble the L-shaped fixer 4, insert the round rod 14 into the sliding groove 20, the round rod 14 passes through the limiting ear 22, and the cylinder is rotated so that the limiting block 21 on the cylinder is clamped in the sliding groove 20, and the disassembly and assembly function of the round rod 14 is realized, which is convenient for the staff to replace the round rod 14, pull the limiting rod 29, the limiting rod 29 drives the limiting friction block 30 to rise, the limiting rod 29 squeezes the limiting spring 32, and the limiting spring 32 provides elastic force, and the knob 6 is turned, and the knob 6 drives the rotating rod 7 to rotate, and the rotating rod 7 drives the active bevel gear 8 to rotate, and the active bevel gear 8 is meshed with the driven bevel gear 11 for transmission, The movable bevel gear 11 drives the threaded rod 10 to rotate, the threaded rod 10 drives the lifting block 12 to move, and the lifting block 12 drives the disc 13 to move, thereby realizing the function of adjusting the height of the disc 13, avoiding the phenomenon that the rotating knife contacts the bottom surface or the road curb is too high and collides with the rotating knife, causing the rotating knife to roll. At the same time, the rotating knife can cut shrubs of different heights, loosen the limit rod 29, the limit spring 32 provides elastic force, the limit rod 29 drives the limit friction block 30 to contact the concave friction ring, thereby realizing the function of limiting the rotation button 6, start the motor 2, the motor 2 drives the output rod 3 to rotate, the output rod 3 drives the knife rod 25 to rotate, the knife rod 25 drives the blade 26 to rotate, move the long rod 27, and the long rod 27 drives the blade 26 to cut the shrubs. When cutting to the road curb or the wall, the cylinder is longer than the blade 26, and then contacts the road curb, wall and stone first, so that the rotating tool avoids rolling or breaking, thereby realizing the protection of the rotating knife.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A protective body for a rotary blade of a brush cutter, comprising a housing (1), an L-shaped holder (4) and a disc (13), characterized in that: The L-shaped fixer (4) is provided with a meshing groove (5) and a lifting groove (9) in sequence from top to bottom, and a rotating rod (7) is rotatably connected to the inner wall of the meshing groove (5) via a bearing, a driving bevel gear (8) is provided at one end of the rotating rod (7), and a rotating knob (6) is provided at the other end of the rotating rod (7), a threaded rod (10) is rotatably connected to the inner wall of the lifting groove (9) via a bearing, and a driven bevel gear (11) is provided at one end of the threaded rod (10), and the outer part of the driving bevel gear (8) is meshed with the driven bevel gear (11), a sliding groove (20) is provided on the outer wall of the top of the disc (13), and a round rod (14) is slidably connected to the inner part of the sliding groove (20), and a lifting block (12) is provided on the outer wall of one side of the disc (13).

2. A protective body for a rotary blade of a brush cutter according to claim 1, characterized in that: A clamping groove (15) is provided on the outer wall of one side of the L-shaped fixer (4), and a slot (16) is provided on the inner wall of the clamping groove (15). A limiter (28) is provided on the outer wall of one side of the L-shaped fixer (4), and the inside of the limiter (28) is slidably connected to a limit rod (29).

3. A protective body for a rotary blade of a brush cutter according to claim 2, characterized in that: A limiting friction block (30) is provided at one end of the limiting rod (29), and a limiting spring (32) is connected on the outer wall of the limiting rod (29) and the inner wall of the limiter (28), a concave friction ring (31) is sleeved on the outer wall of the knob (6), an insert rod (17) is inserted into the interior of the slot (16), and a fixing nut (18) is provided on the inner wall of the slot (16).

4. A protective body for a rotary blade of a brush cutter according to claim 3, characterized in that: A fixing block (19) is provided on the outer wall of one side of the housing (1), and the fixing block (19) is clamped in the interior of the clamping groove (15), the insertion rod (17) passes through the interior of the fixing block (19), and the insertion rod (17) is threadedly inserted in the interior of the fixing nut (18).

5. A protective body for a rotary blade of a brush cutter according to claim 4, characterized in that: A limit hanging ear (22) is arranged on the outer wall of the top of the disc (13), and the interior of the limit hanging ear (22) is connected to the round rod (14) through and through, and a limit block (21) is arranged on the outer wall of the round rod (14), and the limit block (21) is clamped in the interior of the sliding groove (20).

6. A protective body for a rotary blade of a brush cutter according to claim 5, characterized in that: A motor (2) is arranged on the inner wall of the housing (1), and an output rod (3) is arranged on the output shaft of the motor (2); an anti-entanglement sleeve (23) is arranged on the outer wall of the bottom of the motor (2), and a long rod (27) is rotatably connected to the outer wall of the motor (2) via a rotating shaft.

7. A protective body for a rotary blade of a brush cutter according to claim 6, characterized in that: A knife rod (25) is provided on both sides of the output rod (3), and a long grass-stripping arm (24) is provided on the outer wall of the top of the knife rod (25). A blade (26) is provided at one end of the knife rod (25) away from the output rod (3).

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