Brush cutter with adjustable blade angle

Abstract

The utility model discloses a brush cutter with an adjustable blade angle, which comprises a brush cutter body, a first U-shaped frame fixedly mounted at one end of an operating rod of the brush cutter body, a second U-shaped frame rotatably mounted in the first U-shaped frame, a pipe barrel fixedly mounted at one end of the second U-shaped frame, a first bevel gear rotatably mounted in the pipe barrel, and a second bevel gear rotatably mounted in the first bevel gear. The first bevel gear is meshed with a second bevel gear, the second bevel gear is rotatably mounted at the top in the pipe barrel, a connecting rod is fixedly mounted on the lower surface of the second bevel gear, one end of the second bevel gear is rotatably connected with an angle adjusting mechanism, and the other end of the angle adjusting mechanism is fixedly connected with an engine output shaft rotatably mounted in the operating rod. Through the design of the angle adjusting mechanism, the angle of the cutterhead can be adjusted, the cutterhead can be better attached to grass with different growth states and terrains, the cutterhead can cut into the grass at a more appropriate angle, and cutting is smoother.

Description

Technical Field

[0001] This utility model relates to the field of garden tool technology, specifically a brush cutter with adjustable blade angle. Background Technology

[0002] Brush cutters are classified into electric and internal combustion engines based on their power source. Internal combustion engines are further divided into two-stroke and four-stroke gasoline engines. Based on their transmission method, they are classified into flexible shaft transmission and straight rod transmission. Based on their fuel supply method, they are classified into float type and pump diaphragm type.

[0003] For example, the patent with national authorized patent announcement number CN222655817U discloses a height-adjustable brush cutter, including a body, a frame, and blades. The frame includes a frame one and a frame two. A sliding groove is provided on the frame two. Two adjusting plates are fixedly connected to the top surface of the frame one, and a rack is fixedly connected to the two adjusting plates. The two adjusting plates are staggered and have a gap. An adjusting rod is rotatably connected to the frame two. A gear one and a gear two are fixedly connected to the adjusting rod. When it is necessary to adjust the trimming range of the brush cutter, the adjusting rod is slid inward or outward, so that gear one or gear two meshes with the rack on one of the adjusting plates. Further rotating the adjusting rod causes the frame one to gradually slide into or out of the sliding groove, thereby achieving the function of adjusting the length of the frame, which is used to control the trimming range of the brush cutter, thus facilitating the completion of the trimming task.

[0004] However, the height-adjustable brush cutter mentioned above cannot adjust the tilt angle of the cutter head during the grass cutting process. The inability to adjust the cutter head angle will make it impossible to maintain the optimal cutting angle between the blades and the grass stems when encountering sloping weeds or uneven grasslands. This will result in uneven cutting, missed cuts, incomplete cuts, or uneven stubble after cutting, which will reduce the overall work efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a brush cutter with an adjustable blade angle to solve the problem mentioned in the background art that the blade angle cannot be adjusted during the cutting of grass, and that the inability to adjust the blade angle makes it impossible to maintain the optimal cutting angle between the blade and the grass stem when encountering slanted weeds or uneven grassland.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An adjustable blade angle brush cutter includes: a brush cutter body; a first U-shaped frame fixedly mounted on one end of the operating lever of the brush cutter body; a second U-shaped frame rotatably mounted inside the first U-shaped frame; a tube fixedly mounted on one end of the second U-shaped frame; a first bevel gear rotatably mounted inside the tube; the first bevel gear meshing with the second bevel gear; the second bevel gear rotatably mounted on the top of the tube; a connecting rod fixedly mounted on the lower surface of the second bevel gear; the connecting rod of the second bevel gear passing through the lower surface of the tube and fixedly mounted on a cutter disc; one end of the second bevel gear rotatably connected to an angle adjustment mechanism; and the other end of the angle adjustment mechanism fixedly connected to an engine output shaft rotatably mounted inside the operating lever.

[0008] Preferably, the angle adjustment mechanism rotates between the first U-shaped frame and the second U-shaped frame.

[0009] Preferably, a grass-blocking plate is fixedly installed on the outer surface of the operating rod.

[0010] Preferably, the angle adjustment mechanism includes a double-hinged connecting rod and an electric push rod. Both ends of the double-hinged connecting rod are Y-shaped and rotatably connected to the first U-shaped frame and the second U-shaped frame, respectively. The first U-shaped frame is fixedly installed at one end of the engine's output shaft and located inside the first U-shaped frame. The second U-shaped frame is fixedly installed at one end of the second bevel gear and located inside the second U-shaped frame. The electric push rod is rotatably installed on the outer surface of the operating rod, and the piston rod of the electric push rod is rotatably connected to the tube.

[0011] Preferably, the second bevel gear is driven to rotate by the engine's output shaft via a double-hinged connecting rod.

[0012] Preferably, this allows the electric push rod to drive the second U-shaped frame to rotate within the first U-shaped frame by pushing and pulling the tube, thereby enabling the second U-shaped frame to drive the cutter head, which is rotatably mounted at the lower end of the tube, to adjust its angle.

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

[0014] 1. Through the design of the operating lever, cutter head, first bevel gear, second bevel gear, and angle adjustment mechanism, during use, the output shaft is rotated within the operating lever by starting the engine. The output shaft then drives the first bevel gear to rotate via the angle adjustment mechanism. The rotating first bevel gear meshes with and drives the second bevel gear to rotate at the top of the tube. This, in turn, causes the cutter head on the lower surface of the connecting rod to rotate on the lower surface of the tube, thus cutting the grass. During the cutting process, the angle adjustment mechanism can be activated simultaneously to push or pull the second U-shaped frame within the first U-shaped frame of the operating lever to rotate. This allows the second U-shaped frame to adjust the angle of the cutter head, which is rotated and mounted at the lower end of the tube. By adjusting the angle of the cutter head, it can better fit the grass in different growth states and terrains, cutting into the grass at a more suitable angle, resulting in smoother cutting, fewer cuts, and thus improved cutting efficiency.

[0015] 2. Through the design of the electric push rod, the first U-shaped frame, the second U-shaped frame, and the double-hinged connecting rod, when the engine is started and the first U-shaped frame at one end of the output shaft rotates, it will drive the second U-shaped frame, which is rotatably mounted on the other end of the double-hinged connecting rod, to rotate. The second U-shaped frame is fixedly mounted on one end of the first bevel gear, thus enabling the first bevel gear to rotate stably through the output shaft via the double-hinged connecting rod, thereby driving the cutter head to perform grass cutting operations. When it is necessary to adjust the angle of the cutter head, the piston rod can be pushed or pulled by starting the electric push rod to push the tube, allowing the tube to rotate within the first U-shaped frame through the second U-shaped frame. During this process, the tube is fixed at one end of the first bevel gear. The second U-shaped frame rotates synchronously with the second U-shaped frame. Because the two ends of the double-hinged connecting rod are rotatably connected to the first and second U-shaped frames respectively, the rotation of the second U-shaped frame will cause the double-hinged connecting rod to change its posture to always maintain the transmission with the output shaft, ensuring the stability of power transmission. This avoids uneven force or jamming of the transmission components caused by angle changes. The driven second bevel gear can change the angle of the cutter head together, realizing the tilt of the cutter head to one side. This allows the operator to easily adjust the tilt position of the cutter head to cut grass around obstacles, avoiding the problem of not being able to handle these areas due to the fixed angle of the cutter head, and improving the operational flexibility and working range of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the brush cutter with adjustable blade angle according to this utility model;

[0017] Figure 2 This is a schematic diagram of the meshing structure of the first bevel gear and the second bevel gear of this utility model;

[0018] Figure 3 This is a schematic diagram of the angle adjustment mechanism of this utility model.

[0019] In the diagram: 1. Operating lever; 101. Grass guard; 102. First U-shaped frame; 103. Second U-shaped frame; 104. Cutter head; 105. Second bevel gear; 106. First bevel gear; 107. Output shaft; 108. Tube; 2. Angle adjustment mechanism; 201. Electric push rod; 202. First U-shaped frame; 203. Double hinge connecting rod; 204. Second U-shaped frame. Detailed Implementation

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

[0021] Please see Figures 1-3 This embodiment provides the following technical solution:

[0022] like Figures 1-2 As shown, a brush cutter with adjustable blade angle includes: a brush cutter body; a first U-shaped frame 102 is fixedly mounted on one end of the operating lever 1 of the brush cutter body; a second U-shaped frame 103 is rotatably mounted inside the first U-shaped frame 102; a tube 108 is fixedly mounted on one end of the second U-shaped frame 103; a first bevel gear 106 is rotatably mounted inside the tube 108; the first bevel gear 106 meshes with a second bevel gear 105; the second bevel gear 105 is rotatably mounted on the top of the tube 108. A connecting rod is fixedly installed on the lower surface of gear 105. The connecting rod of the second bevel gear 105 passes through the lower surface of the tube 108 and is fixedly installed on the cutter head 104. One end of the second bevel gear 105 is rotatably connected to the angle adjustment mechanism 2. The other end of the angle adjustment mechanism 2 is fixedly connected to the engine output shaft 107 rotatably installed inside the operating lever 1. The angle adjustment mechanism 2 rotates between the first U-shaped frame 102 and the second U-shaped frame 103. A grass baffle 101 is fixedly installed on the outer surface of the operating lever 1.

[0023] Through the design of the operating lever 1, cutter head 104, first bevel gear 106, second bevel gear 105, and angle adjustment mechanism 2, in use, starting the engine drives the output shaft 107 to rotate within the operating lever 1. The output shaft 107 then drives the first bevel gear 106 to rotate via the angle adjustment mechanism 2. The rotating first bevel gear 106 meshes with and drives the second bevel gear 105 to rotate at the top of the tube 108. This, in turn, allows the second bevel gear 105 to drive the cutter head 104 on the lower surface of the connecting rod to rotate on the lower surface of the tube 108, thereby achieving... To achieve the cutting of grass, while the blade 104 is cutting the grass, the angle adjustment mechanism 2 can be activated simultaneously to push or pull the second aperture frame 103 to rotate within the first aperture frame 102 of the operating lever 1. This allows the second aperture frame 103 to drive the blade 104, which is rotatably mounted at the lower end of the tube 108, to adjust its angle. By adjusting the angle of the blade 104, it can better fit the grass in different growth states and terrains, cutting into the grass at a more suitable angle, making the cutting smoother, reducing the number of cuts, and thus improving cutting efficiency.

[0024] like Figure 3 As shown, the angle adjustment mechanism 2 includes a double-hinged connecting rod 203 and an electric push rod 201. Both ends of the double-hinged connecting rod 203 are Y-shaped and rotatably connected to a first U-shaped frame 202 and a second U-shaped frame 204, respectively. The first U-shaped frame 202 is fixedly installed at one end of the engine's output shaft 107 and located within the first U-shaped frame 102. The second U-shaped frame 204 is fixedly installed at one end of the second bevel gear 105 and located within the second U-shaped frame 103. The electric push rod 201 rotates... Installed on the outer surface of the operating lever 1, the piston rod of the electric push rod 201 is rotatably connected to the tube 108. The second bevel gear 105 can be rotated by the output shaft 107 of the engine through the double hinge connecting rod 203. The electric push rod 201 can drive the second flange 103 to rotate within the first flange 102 by pushing and pulling the tube 108, thereby enabling the second flange 103 to drive the cutter head 104 rotatably mounted at the lower end of the tube 108 to adjust its angle.

[0025] Through the design of the electric push rod 201, the first U-shaped frame 202, the second U-shaped frame 204, and the double-hinged connecting rod 203, when the engine is started, the first U-shaped frame 202 at one end of the output shaft 107 rotates. This, in turn, drives the second U-shaped frame 204, which is rotatably mounted on the other end of the double-hinged connecting rod 203, to rotate. The second U-shaped frame 204 is fixedly mounted on one end of the first bevel gear 106, allowing the first bevel gear 106 to rotate stably via the output shaft 107 through the double-hinged connecting rod 203. This, in turn, drives the cutter head 104 to perform mowing operations. When the angle of the cutter head 104 needs to be adjusted, the electric push rod 201 can be activated to push or pull the piston rod, causing the tube 108 to rotate within the first U-shaped frame 102 via the second U-shaped frame 103. During this process... The second U-shaped frame 204, fixed to one end of the first bevel gear 106, rotates synchronously with the second U-shaped frame 103. Since the two ends of the double-hinged connecting rod 203 are rotatably connected to the first U-shaped frame 202 and the second U-shaped frame 204 respectively, the rotation of the second U-shaped frame 204 will cause the double-hinged connecting rod 203 to change its posture to always maintain the transmission with the output shaft 107, ensuring the stability of power transmission. This avoids uneven force or jamming of the transmission components caused by angle changes. The driven second bevel gear 105 can change its angle together with the cutter head 104, realizing the tilt of the cutter head 104 to one side. This allows the operator to easily adjust the tilt position of the cutter head 104 to cut the grass around the obstacle, avoiding the problem of not being able to handle these areas due to the fixed angle of the cutter head 104, and improving the operational flexibility and working range of the equipment.

[0026] Based on the above technical solution, the working steps of this solution are summarized as follows: During use, the output shaft 107 can be rotated within the operating lever 1 by starting the engine. The output shaft 107 then rotates the double-hinged connecting rod 203 via the first U-shaped frame 202. The double-hinged connecting rod 203 then drives the first bevel gear 106 at one end of the second U-shaped frame 204 to mesh with and drive the second bevel gear 105 to rotate. This allows the second bevel gear 105 to drive the cutter disc 104 on the lower surface of the connecting rod to rotate on the lower surface of the tube 108, thereby cutting the grass. During the cutting process, the electric push rod 201 can be activated to push or pull the piston rod to push the tube 108, causing the tube 108 to rotate within the first U-shaped frame 102 via the second U-shaped frame 103. During this process, the tube 108 is fixed... The second U-shaped frame 204 at one end of the first bevel gear 106 rotates synchronously with the second U-shaped frame 103. Since the two ends of the double-hinged connecting rod 203 are rotatably connected to the first U-shaped frame 202 and the second U-shaped frame 204 respectively, the rotation of the second U-shaped frame 204 will cause the double-hinged connecting rod 203 to change its posture to always maintain the transmission with the output shaft 107, ensuring the stability of power transmission. This avoids uneven force or jamming of the transmission components caused by angle changes. The driven second bevel gear 105 can change the angle together with the cutter head 104, realizing the tilt of the cutter head 104 to one side. This allows the operator to easily adjust the tilt position of the cutter head 104 to cut the grass around the obstacle, avoiding the problem that these areas cannot be handled due to the fixed angle of the cutter head 104, and improving the operational flexibility and working range of the equipment.

[0027] In summary, this brush cutter with adjustable blade angle allows for adjustment of the angle of the cutter head 104, enabling the cutter head 104 to better conform to grasses of different growth stages and terrains. It can cut into the grass at a more suitable angle, resulting in smoother cutting, fewer cuts, and thus improved cutting efficiency.

[0028] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A brush cutter with an adjustable blade angle, characterized in that, Include: The operating rod (1) of the brush cutter body is fixedly installed with a first U-shaped frame (102) at one end, the second U-shaped frame (103) is rotatably installed in the first U-shaped frame (102), the pipe cylinder (108) is fixedly installed at one end of the second U-shaped frame (103), the first bevel gear (106) is rotatably installed in the pipe cylinder (108), the second bevel gear (105) is rotatably installed at the top of the pipe cylinder (108), the connecting rod is fixedly installed on the lower surface of the second bevel gear (105), the connecting rod of the second bevel gear (105) is rotatably installed on the lower surface of the pipe cylinder (108) and fixedly installed with the cutter head (104), one end of the second bevel gear (105) is rotatably connected with the angle adjusting mechanism (2), the other end of the angle adjusting mechanism (2) is fixedly connected with the engine output shaft (107) rotatably installed in the operating rod (1).

2. A brush cutter with an adjustable blade angle according to claim 1, characterized in that: The angle adjusting mechanism (2) is rotatable between the first U-shaped frame (102) and the second U-shaped frame (103).

3. A brush cutter with adjustable blade angle according to claim 1, characterized in that: The operating rod (1) is fixedly installed with a grass baffle (101) on the outer surface.

4. A brush cutter with adjustable blade angle according to claim 1, characterized in that: The angle adjusting mechanism (2) includes a double-hinged connecting rod (203) and an electric push rod (201), both ends of the double-hinged connecting rod (203) are Y-shaped and are rotatably connected with a first U-shaped frame (202) and a second U-shaped frame (204) respectively, the first U-shaped frame (202) is fixedly installed at one end of the output shaft (107) of the engine and located in the first U-shaped frame (102), the second U-shaped frame (204) is fixedly installed at one end of the second bevel gear (105) and located in the second U-shaped frame (103), the electric push rod (201) is rotatably installed on the outer surface of the operating rod (1), and the piston rod of the electric push rod (201) is rotatably connected with the pipe cylinder (108).

5. A brush cutter with adjustable blade angle according to claim 4, characterized in that: The second bevel gear (105) can be driven to rotate by the output shaft (107) of the engine through the double-hinged connecting rod (203).

6. A brush cutter with adjustable blade angle according to claim 4, characterized in that: The electric push rod (201) can drive the second U-shaped frame (103) to rotate in the first U-shaped frame (102) by pushing and pulling the pipe cylinder (108), thereby enabling the second U-shaped frame (103) to drive the cutter head (104) rotatably installed at the lower end of the pipe cylinder (108) to adjust the angle.

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