A walk-behind lawnmower

Abstract

The utility model provides a kind of hand-held mower belongs to mechanical equipment technical field.It solves the problem of insufficient operating precision of mower in prior art.The utility model includes drive assembly, control assembly, exhaust component and cutting component, operating handle one end is connected with gear box outer end two sides, drive axle two sides respectively have first drive shaft and second drive shaft, height adjusting lever and advance and retreat control lever are connected with first drive shaft and second drive shaft respectively, drive axle two sides are fixedly connected with side axle housing, side axle housing is stretched out with shift shaft, high-low speed control connecting rod lower end is connected with shift arm and shift arm is connected with the shift shaft of side axle housing, gear box upper end is connected with connecting mechanism, power control connecting rod one end is connected with connecting mechanism, side axle housing outside is connected with tire assembly.The utility model has the advantages of higher operating precision, easy to disassemble and maintain.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment technology and relates to a hand-held lawn mower. Background Technology

[0002] Hand-held lawn mowers are vegetation trimming equipment suitable for small areas such as lawns, orchards, and hills. They use a power unit to drive the blades to rotate at high speed to achieve cutting. The handle can be adapted to different operating postures, and the walking mechanism includes wheeled or tracked designs to adapt to various terrains.

[0003] Chinese patent publication number CN204392857U discloses a walk-behind lawnmower, including a frame, handlebar, throttle, emergency stop safety protection device, clutch device, wheels, engine, protective cover, power take-off shaft, eccentric mechanism, cutter, blade fixing device, and S-shaped depth limiting device. The handlebar is located at the rear of the frame; the throttle is fixed above one side of the handlebar; the emergency stop safety protection device is fixed below the throttle; the clutch device is fixed on the other side of the handlebar; wheels are fixed on both sides of the frame; the engine is fixed above the frame; the engine is connected to the power take-off shaft; the protective cover is fixed above the power take-off shaft; the eccentric mechanism is fixed at the front end of the power take-off shaft; the cutter is fixed below the eccentric mechanism; the blade fixing device is fixed above the cutter; and the S-shaped depth limiting device is fixed at the rear end of the cutter.

[0004] The patent provides a hand-held lawnmower that cannot accurately set the cutting height, resulting in uneven lawns after mowing, which affects the appearance. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a hand-held lawn mower.

[0006] The objective of this utility model can be achieved through the following technical solution: A hand-held lawnmower includes a drive assembly, a control assembly, an exhaust assembly, and a cutting assembly. The drive assembly includes an engine, a drive axle, a gearbox, and a blade transmission assembly. The drive axle is fixedly connected to one end of the engine, and the gearbox is fixedly connected to one end of the drive axle, with the other end of the gearbox fixedly connected to the blade transmission assembly. The control assembly includes a control panel, operating handles, a forward / reverse shift lever, a high / low speed shift lever, a power control linkage, a high / low speed control linkage, a height adjustment lever, and a forward / reverse control lever. There are two operating handles, with one end connected to both sides of the outer end of the gearbox. The drive axle... A first drive shaft and a second drive shaft extend from both sides respectively. The height adjustment lever and the forward / reverse control lever are connected to the first drive shaft and the second drive shaft respectively. The ends of the height adjustment lever and the forward / reverse control lever are connected to the first link and the second link respectively. The high / low speed shift lever and the forward / reverse shift lever are connected to the first link and the second link respectively. Side axle housings are fixedly connected to both sides of the drive axle. A shift shaft extends from the side axle housing. The lower end of the high / low speed control link is connected to a shift arm, and the shift arm is connected to the shift shaft of the side axle housing. A connecting mechanism is connected to the upper end of the gearbox. One end of the power control link is connected to the connecting mechanism. A tire assembly is connected to the outer side of the side axle housing.

[0007] In the aforementioned hand-held lawn mower, the cutting assembly includes a cutting blade and a protective baffle. The blade transmission assembly has an L-shaped structure, and the cutting blade is connected to one end of the blade transmission assembly. Cutting support slippers are formed on both sides of the protective baffle.

[0008] In the aforementioned hand-held lawnmower, the control panel has several control holes, and the operating handle, power control linkage, and high / low speed control linkage pass through the control holes and are connected to the control panel.

[0009] In the aforementioned hand-held lawnmower, a battery box is installed on the upper end of the gearbox, a protective cover is fixedly connected to the upper end of the battery box, and the other end of the protective cover is fixedly connected to the control board.

[0010] In the aforementioned hand-held lawnmower, a protective crank is fixedly connected to the rear end of the engine, the upper end of the protective crank is fixedly connected to the control board, a support plate is connected to the lower end of the engine, and the lower end of the protective crank is fixedly connected to the support plate.

[0011] In the aforementioned hand-held lawnmower, the outer side of the operating handle is connected to an advance / reverse pivot assembly and a shift pivot assembly, and the high / low speed shift lever and the advance / reverse shift linkage are respectively connected to the advance / reverse pivot assembly and the shift pivot assembly.

[0012] In the aforementioned walk-behind lawnmower, the exhaust assembly includes a cylinder head, a carburetor, an intake chamber, an air filter, and an exhaust muffler. The cylinder head is mounted on the outer end of the engine, the carburetor is mounted on one side of the cylinder head, an ignition wire is connected to the cylinder head, and the other end of the ignition wire is connected to the inside of the engine. The intake chamber is fixedly connected to one end of the carburetor, the air filter is mounted on the upper end of the intake chamber, a valve cover is mounted on the outside of the cylinder head, one end of the valve cover extends out and connects to the intake chamber, an elbow connecting pipe is connected to one end of the cylinder head, and the exhaust muffler is connected to the end of the elbow connecting pipe.

[0013] Compared with the prior art, the hand-held lawnmower provided by this utility model has the following beneficial effects: 1. The high and low speed shift lever is connected to the height adjustment lever through the first connecting rod, and then connected to the first drive shaft of the drive axle. The forward and reverse shift lever is connected to the forward and reverse control lever through the second connecting rod, and connected to the second drive shaft, forming a two-stage precision transmission link. There is no redundant transfer structure, and the transmission of shift commands is delayed and lossless, significantly improving the shift accuracy; 2. The height adjustment lever is directly fixedly connected to the first drive shaft of the drive axle without the need for additional intermediate transfer parts, realizing direct linkage between the cutting height adjustment and the whole machine drive system. The adjustment response speed is fast and the adjustment accuracy is higher; 3. Each component of the control component is independently modularly designed and connected to the control board and drive axle through standard connecting parts such as bolts and bushings. Disassembly does not require disassembling the whole machine, but only the corresponding connecting parts need to be separated, which is convenient for replacement and maintenance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another angle; Figure 3 This is a schematic diagram of the driver component structure; Figure 4 This is a schematic diagram of the exhaust assembly structure.

[0015] In the diagram: 1. Drive assembly; 11. Engine; 111. Support plate; 12. Drive axle; 121. First drive shaft; 122. Second drive shaft; 123. Side axle housing; 124. Shift shaft; 13. Gearbox; 131. Connecting mechanism; 14. Blade drive assembly; 2. Control assembly; 21. Control board; 211. Control hole; 22. Operating handle; 221. Forward / reverse pivot assembly; 222. Shift pivot assembly; 23. Forward / reverse shift lever; 24. High / low speed shift lever; 25. Power control linkage; 26. High / low... Speed ​​control linkage; 261, shift arm; 27, height adjustment lever; 271, first linkage; 28, forward / reverse control lever; 281, second linkage; 3, exhaust assembly; 31, cylinder head; 32, carburetor; 33, intake chamber; 34, air filter; 35, exhaust muffler; 36, ignition wire; 37, elbow connecting pipe; 38, valve cover; 4, cutting assembly; 41, cutting blade; 42, protective baffle; 421, cutting support slipper; 5, tire assembly; 6, battery box; 7, protective hood; 8, protective crankshaft. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 4 As shown, this embodiment includes a drive assembly 1, a control assembly 2, an exhaust assembly 3, and a cutting assembly 4. The drive assembly 1 includes an engine 11, a drive axle 12, a gearbox 13, and a blade transmission assembly 14. The drive axle 12 is bolted to one end of the engine 11 to achieve initial power transmission. The gearbox 13 is fastened to one end of the drive axle 12, and the other end of the gearbox 13 is fixedly connected to the blade transmission assembly 14. The blade transmission assembly 14 adopts an L-shaped structure design, which can accurately change the power transmission direction and provide a suitable power output angle for the operation of the cutting assembly 4. A first drive shaft 121 and a second drive shaft 122 extend from both sides of the drive axle 12, respectively. Side axle housings 123 are also fixedly connected to both sides of the drive axle 12. A shift shaft 124 extends from the side axle housing 123. A tire assembly 5 is connected to the outside of the side axle housing 123 to enable flexible movement of the entire machine. A support plate 111 is connected to the lower end of the engine 11 to provide stable support for the engine 11 and prevent position displacement due to vibration during operation.

[0018] like Figures 1 to 2As shown, the control assembly 2 includes a control board 21, an operating handle 22, a forward / reverse shift lever 23, a high / low speed shift lever 24, a power control linkage 25, a high / low speed control linkage 26, a height adjustment lever 27, and a forward / reverse control lever 28. There are two operating handles 22, one end of which is connected to the two outer sides of the gearbox 13, making it easy for the operator to hold and control the direction of the machine. The outer side of the operating handle 22 is connected to the forward / reverse pivot assembly 221 and the shift pivot assembly 222, respectively. The high / low speed shift lever 24 and the forward / reverse shift lever 23 are connected to the forward / reverse pivot assembly 221 and the shift pivot assembly 222, respectively. The rotation of the pivot assembly realizes the flexible switching of the shifting action.

[0019] like Figures 1 to 2 As shown, the height adjustment lever 27 and the forward / reverse control lever 28 are respectively connected to the first drive shaft 121 and the second drive shaft 122. The ends of the height adjustment lever 27 and the forward / reverse control lever 28 are respectively connected to the first connecting rod 271 and the second connecting rod 281. The high / low speed shift lever 24 and the forward / reverse shift lever 23 are respectively connected to the first connecting rod 271 and the second connecting rod 281 to form a complete control transmission link. The lower end of the high / low speed control link 26 is connected to the shift arm 261, and the shift arm 261 is connected to the shift shaft 124 of the side axle housing 123. By operating the high / low speed shift lever 24, the shift arm 261 is driven to rotate, thereby driving the shift shaft 124 to realize high / low speed switching.

[0020] like Figures 1 to 2 As shown, a connecting mechanism 131 is connected to the upper end of the gearbox 13. One end of the power control linkage 25 is connected to the connecting mechanism 131. The power transmitted from the engine 11 to the gearbox 13 can be adjusted through the power control linkage 25. Several control holes 211 are provided in the control plate 21. The operating handle 22, the power control linkage 25 and the high and low speed control linkage 26 pass through the corresponding control holes 211 and are connected to the control plate 21. The control plate 21 plays a role in positioning and supporting each control component to ensure operational stability.

[0021] To elaborate further, such as Figures 1 to 2 As shown, a battery box 6 is installed on the upper end of the gearbox 13 to house the power supply battery and provide power to the electrical components of the whole machine. A protective cover 7 is fixedly connected to the upper end of the battery box 6, and the other end of the protective cover 7 is fixedly connected to the control board 21. This can effectively protect the battery box 6 and the internal battery from external impacts and dust corrosion. A protective crank 8 is fixedly connected to the rear end of the engine 11. The upper end of the protective crank 8 is fixedly connected to the control board 21, and the lower end is fixedly connected to the support plate 111. The protective crank 8 further strengthens the connection strength between the control board 21, the engine 11, and the support plate 111, and improves the overall structural stability of the machine.

[0022] like Figures 1 to 2As shown, the cutting assembly 4 includes a cutting blade 41 and a protective baffle 42. The cutting blade 41 is connected to one end of the blade transmission assembly 14. The blade transmission assembly 14 drives the cutting blade 41 to rotate at high speed to cut the lawn. Cutting support slippers 421 are formed on both sides of the protective baffle 42. During operation, the cutting support slippers 421 contact the ground, which can limit the cutting height and reduce the friction between the protective baffle 42 and the ground, ensuring that the lawnmower moves smoothly.

[0023] To elaborate further, such as Figure 1 and Figure 4 As shown, the exhaust assembly 3 includes a cylinder head 31, a carburetor 32, an intake chamber 33, an air filter 34, and an exhaust muffler 35. The cylinder head 31 is mounted on the outer end of the engine 11, and the carburetor 32 is mounted on one side of the cylinder head 31. An ignition wire 36 is connected to the cylinder head 31, and the other end of the ignition wire 36 is connected to the inside of the engine 11 to start the engine 11. The intake chamber 33 is fixedly connected to one end of the carburetor 32, and the air filter 34 is mounted on the upper end of the intake chamber 33 to filter the air entering the intake chamber 33. The air is filtered to prevent impurities from entering the engine 11 and causing wear. A valve cover 38 is installed on the outside of the cylinder head 31. One end of the valve cover 38 extends into the intake pipe and is connected to the intake chamber 33 to ensure the airtightness of the intake passage. One end of the cylinder head 31 is connected to a bend connecting pipe 37. The exhaust muffler 35 is connected to the end of the bend connecting pipe 37. The exhaust gas generated by the engine 11 enters the bend connecting pipe 37 through the cylinder head 31 and is finally discharged after noise reduction by the exhaust muffler 35, reducing noise pollution during operation.

[0024] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0025] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A hand-held lawnmower, comprising a drive assembly (1), a control assembly (2), an exhaust assembly (3), and a cutting assembly (4), characterized in that: The drive assembly (1) includes an engine (11), a drive axle (12), a gearbox (13), and a blade transmission assembly (14). The drive axle (12) is fixedly connected to one end of the engine (11). The gearbox (13) is fixedly connected to one end of the drive axle (12), and the other end of the gearbox (13) is fixedly connected to the blade transmission assembly (14). The control assembly (2) includes a control board (21), an operating handle (22), a forward / reverse shift lever (23), a high / low speed shift lever (24), a power control linkage (25), a high / low speed control linkage (26), a height adjustment lever (27), and a forward / reverse control lever (28). There are two operating handles (22), and one end of each operating handle (22) is connected to both sides of the outer end of the gearbox (13). A first drive shaft (121) and a second drive shaft (122) extend from both sides of the drive axle (12). The height adjustment lever (27) and the forward / reverse control lever (28) are also connected to the gearbox (13). The lever (28) is connected to the first drive shaft (121) and the second drive shaft (122) respectively. The ends of the height adjustment lever (27) and the forward / reverse control lever (28) are respectively connected to the first connecting rod (271) and the second connecting rod (281). The high / low speed shift lever (24) and the forward / reverse shift lever (23) are respectively connected to the first connecting rod (271) and the second connecting rod (281). The drive axle (12) is fixedly connected to the two sides of the side axle housing (123). A shift shaft (124) extends from the side axle housing (123). The lower end of the high and low speed control linkage (26) is connected to a shift arm (261), and the shift arm (261) is connected to the shift shaft (124) of the side axle housing (123). A connecting mechanism (131) is connected to the upper end of the gearbox (13). One end of the power control linkage (25) is connected to the connecting mechanism (131). A tire assembly (5) is connected to the outside of the side axle housing (123).

2. The hand-held lawnmower according to claim 1, characterized in that: The cutting assembly (4) includes a cutting blade (41) and a protective baffle (42). The blade transmission assembly (14) has an L-shaped structure. The cutting blade (41) is connected to one end of the blade transmission assembly (14). Cutting support slippers (421) are formed on both sides of the protective baffle (42).

3. A hand-held lawnmower according to claim 1, characterized in that: The control board (21) has several control holes (211). The operating handle (22), power control linkage (25) and high and low speed control linkage (26) pass through the control holes (211) and are connected to the control board (21).

4. A hand-held lawnmower according to claim 1, characterized in that: A battery box (6) is installed on the upper end of the gearbox (13), and a protective cover (7) is fixedly connected to the upper end of the battery box (6). The other end of the protective cover (7) is fixedly connected to the control board (21).

5. A hand-held lawnmower according to claim 1, characterized in that: The engine (11) is fixedly connected to a protective crank rod (8) at its rear end. The upper end of the protective crank rod (8) is fixedly connected to the control plate (21). The engine (11) is connected to a support plate (111) at its lower end. The lower end of the protective crank rod (8) is fixedly connected to the support plate (111).

6. A hand-held lawnmower according to claim 1, characterized in that: The operating handle (22) is connected to the outside of the forward / backward pivot assembly (221) and the shift pivot assembly (222), respectively. The high / low speed shift lever (24) and the forward / backward shift linkage are respectively connected to the forward / backward pivot assembly (221) and the shift pivot assembly (222).

7. A hand-held lawnmower according to claim 1, characterized in that: The exhaust assembly (3) includes a cylinder head (31), a carburetor (32), an intake chamber (33), an air filter (34), and an exhaust muffler (35). The cylinder head (31) is mounted on the outer end of the engine (11), and the carburetor (32) is mounted on one side of the cylinder head (31). An ignition wire (36) is connected to the cylinder head (31), and the other end of the ignition wire (36) is connected to the inside of the engine (11). The intake chamber (33) is fixedly connected to one end of the carburetor (32). The air filter (34) is installed on the upper end of the intake chamber (33). A valve cover (38) is installed on the outside of the cylinder head (31). One end of the valve cover (38) extends out of the intake pipe and is connected to the intake chamber (33). One end of the cylinder head (31) is connected to a bend connecting pipe (37). The exhaust muffler (35) is connected to the end of the bend connecting pipe (37).

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