Lightweight grass trimmer

Abstract

The invention relates to a light-weight grass trimmer. The grass trimmer comprises a handle mechanism, a machine head mechanism and a grass trimming mechanism. The machine head mechanism comprises a machine shell, a driving assembly, a clamping and rotating assembly and a rotating shaft assembly, the clamping and rotating assembly is arranged on the machine shell in a sliding mode, a clamping hole is formed in the clamping and rotating assembly, the rotating shaft assembly penetrates through the clamping hole and is in transmission connection with the driving assembly, and the rotating shaft assembly comprises two stopping faces which are oppositely arranged. The clamping hole comprises a clamping area and a rotating area; the rotating shaft assembly moves in the rotating area and is connected with the grass mowing mechanism. And the clamping area is used for clamping and limiting the stop surface and locking the rotating shaft assembly at a corresponding angle. The clamping and rotating assembly moves in the machine shell, a linear sliding mode is adopted, the needed installation space is small, the overall size of the machine head mechanism is greatly reduced, the operation convenience is further improved on the basis that the structure is simplified, and clamping positioning and automatic releasing of the rotating shaft assembly can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of lawn mowers, and in particular to a lightweight lawn mower. Background Art

[0002] A brush cutter uses a motor to drive a blade or a mowing rope to rotate at high speed, cutting or crushing plants on the ground. The mowing mechanism can be either a blade or a rope. The rope cuts plants without being affected by rocks and dirt, significantly improving weeding efficiency. When the mowing mechanism needs to be replaced, the drive mechanism is typically locked before the mowing mechanism is replaced. For example, Publication No. CN113661824A describes a brush cutter with a quick and easy replacement head.

[0003] However, the locking mechanism of the existing lawn mower for replacing the mowing mechanism is arranged on the outside of the machine head, which makes it bulky and easily blocked by the cut grass; in addition, the overall structure of the locking mechanism is complex, which affects the front end weight of the lawn mower and increases the workload of the operator of the lawn mower. Therefore, improvements are needed. Summary of the Invention

[0004] In order to overcome the problems existing in the related art, an embodiment of the present invention provides a lightweight grass trimmer to solve the technical problems that the locking mechanism is arranged outside the head, the volume is large and the weight of the head is heavy.

[0005] According to a first aspect of an embodiment of the present invention, a lightweight lawn mower is provided, comprising a handle mechanism, a head mechanism mounted on the handle mechanism, and a mowing mechanism detachably mounted on the head mechanism, the head mechanism comprising a housing, a drive assembly mounted on the housing, a card assembly, and a shaft assembly, the card assembly being slidably mounted on the housing, the card assembly being provided with a card hole, the shaft assembly passing through the card hole and being in transmission connection with the drive assembly, the shaft assembly comprising two stop surfaces disposed opposite to each other; The clamping hole includes a clamping area and a rotation area, the width of the clamping area is greater than the distance between the two stop surfaces, and the width of the clamping area is smaller than the diameter of the shaft portion where the stop surfaces are located, and the size of the rotation area is greater than the diameter of the shaft portion where the stop surfaces are located; The rotating shaft assembly moves in the rotating area and is connected to the grass trimming mechanism; When the locking assembly slides relative to the housing, the locking area locks the stop surface and locks the rotating shaft assembly at a corresponding angle.

[0006] In one embodiment, the sliding direction of the rotatable assembly is perpendicular to the rotation centerline of the shaft assembly.

[0007] In one embodiment, the card rotation assembly includes a card plate slidably arranged on the housing and an elastic member elastically pushing the card plate, and the card plate keeps the shaft assembly in the rotation zone under the action of the elastic preload force.

[0008] In one embodiment, one end of the clamping plate passes through the housing, and the clamping plate is provided with a stopper for sliding with the housing; or, The card rotation assembly further includes a pressing piece, and the card plate pushes a portion of the pressing piece to pass through the housing.

[0009] In one embodiment, the rotating shaft assembly includes a rotating shaft and a support bearing installed on the rotating shaft, the support bearing is embedded in the housing, the first end of the rotating shaft is transmission-connected to the drive assembly, the stop surface is provided on the rotating shaft between the support bearing and the drive assembly, the second end of the rotating shaft passes through the housing, and the second end is provided with a connecting portion.

[0010] In one embodiment, the driving assembly includes a driving motor, and the output shaft of the driving motor is plug-connected to the rotating shaft assembly.

[0011] In one embodiment, the drive assembly includes a mounting frame installed on the drive motor and a fan blade assembly, the mounting frame is installed with a control board assembly, the fan blade assembly is located between the drive motor and the control board assembly, the mounting frame is provided with exhaust holes, and the casing is provided with multiple heat dissipation holes corresponding to the exhaust holes.

[0012] In one embodiment, the operating voltage of the drive motor is 12V.

[0013] In one embodiment, the handle mechanism includes one or more handle rods, the handle rods are made of a tube made of aluminum alloy material, and the housing is made of aluminum alloy material or plastic material.

[0014] In one embodiment, a power supply mechanism is installed at the end of the handle mechanism, and the power supply mechanism is electrically connected to the drive assembly. The weight ratio of the handle mechanism end where the power supply mechanism is located and the handle mechanism end where the drive assembly is located is B, 1≤B≤5.

[0015] The technical solution provided by the embodiments of the present invention may include the following beneficial effects: the card-turning assembly moves inside the housing and adopts a linear sliding method, requiring a small installation space, greatly reducing the overall volume of the head mechanism, further improving the convenience of operation on the basis of a simplified structure, and realizing the card-turning positioning and automatic release of the shaft assembly. The card-turning hole adopts aperture changes in different areas to match the stop surface of the shaft assembly. The operator switches the card-turning area and the rotating area, and the operation is convenient. The card-turning assembly only needs to move in a linear manner, which can achieve high-precision assembly, and the required active clearance is small, avoiding the risk of the active part being stuck by dirt and weeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] Figure 1 The figure shows the structure of a grass trimmer according to an embodiment.

[0018] Figure 2 It is a structural schematic diagram showing a head mechanism according to an embodiment.

[0019] Figure 3 1 is a longitudinal cross-sectional schematic diagram showing a head mechanism according to an embodiment.

[0020] Figure 4 It is a schematic transverse cross-sectional view of a machine head mechanism according to one embodiment.

[0021] Figure 5 It is a schematic diagram showing a head mechanism hidden in a housing according to one embodiment.

[0022] Figure 6 The figure is a schematic diagram showing the movement of the rotating shaft assembly in the rotating area according to one embodiment.

[0023] Figure 7 The figure is a schematic diagram showing that the rotation of the shaft assembly is restricted by the clamping area according to one embodiment.

[0024] Figure 8 2 is a cross-sectional schematic diagram showing a grass trimming mechanism according to an embodiment.

[0025] In the figure, there are a handle mechanism 10; a handle rod 11; a head mechanism 20; a casing 21; a heat dissipation hole 211; a sliding hole 212; a rotating shaft assembly 22; a rotating shaft 221; a supporting bearing 222; a stop surface 223; a locking assembly 23; a clamping plate 231; an elastic member 232; a pressing member 233; a clamping hole 234; a clamping area 2341; a rotating area 2342; a driving assembly 24; a driving motor 241; a fan blade assembly 242; a control panel assembly 243; a mounting bracket 244; an exhaust hole 245; an energy supply mechanism 30; a mowing mechanism 40; a pulley housing 41; a rope outlet hole 411; a pulley cavity 412; a floating pulley 42; an anti-rotation member 43; and a preload spring 44. DETAILED DESCRIPTION

[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] like Figures 1 to 3 As shown, the present invention provides a lightweight lawn mower, which is operated by an operator by hand or shoulder. The reduced overall weight can reduce the labor intensity of the operator.

[0028] The mower comprises a handle mechanism 10, a head mechanism 20 mounted on the handle mechanism 10, and a mowing mechanism 40 detachably mounted on the head mechanism 20. To explain the mower's operation, the head mechanism 20 is mounted at the lower end of the handle mechanism 10, and the mowing mechanism 40 is mounted on the shaft assembly 22 of the head mechanism 20. When the shaft assembly 22 rotates, the mowing mechanism 40 rotates accordingly, cutting or breaking plants. The mowing mechanism 40 can employ either a rotating blade or a mowing rope.

[0029] The head mechanism 20 serves as the power drive portion and includes a housing 21, a drive assembly 24 mounted therein, and a shaft assembly 22. The housing 21 is a shell structure, preferably formed by joining two outer shells. A motor mounting cavity and a shaft mounting cavity are formed within the housing 21. The outer peripheral wall of the drive assembly 24 is secured to the motor mounting cavity by the housing 21, while the shaft assembly 22 is rotatably secured therein.

[0030] The head mechanism 20 is slidably mounted on a latch assembly 23 of the housing 21. The housing 21 is provided with a sliding hole 212 to guide the linear reciprocating movement of the latch assembly 23. Preferably, the sliding direction of the latch assembly 23 is perpendicular to the rotational centerline of the shaft assembly 22. This allows the latch assembly 23 to vertically constrain the shaft assembly 22, reducing the generation of force components and preventing vibration of the shaft assembly 22.

[0031] The card rotation assembly 23 moves in the housing 21 and adopts a linear sliding method. The required installation space is small, which greatly reduces the overall volume of the head mechanism 20. On the basis of simplifying the structure, the convenience of operation is further improved, and the card connection, positioning and automatic release of the shaft assembly 22 can be realized.

[0032] like Figures 4 to 7 As shown, the card rotation assembly 23 is provided with a card hole 234, and the rotating shaft assembly 22 passes through the card hole 234 and is in transmission connection with the driving assembly 24. Among them, the rotating shaft assembly 22 includes two stop surfaces 223 arranged opposite to each other, and the stop surfaces 223 are parallel to the rotation axis of the rotating shaft assembly 22. The stop surfaces 223 are located in a part of the rotating shaft assembly 22. For the convenience of description, this part of the shaft body is referred to as the chamfered shaft. Among them, The engaging hole 234 is a special-shaped through-hole structure, comprising an engaging area 2341 and a rotation area 2342. These areas 2341 and 2342 form continuous holes with different opening widths. The engaging area 2341 is configured as an elongated hole structure, comprising two opposing elongated hole walls. The width between the two elongated hole walls is slightly greater than the width of the two stop surfaces 223. Specifically, the width of the engaging area 2341 is greater than the distance between the two stop surfaces 223, and the width of the engaging area 2341 is less than the diameter of the shaft portion where the stop surfaces 223 are located. The width of the engaging area 2341 is slightly greater than the distance between the two stop surfaces 223. When the rotatable assembly 23 moves to the engaging area 2341 and engages the chamfered shaft, the rotation of the rotating shaft assembly 22 is obstructed by the elongated hole walls of the engaging area 2341, thereby locking the angle of the rotating shaft assembly 22. If the shaft assembly 22 cannot rotate, the grass trimming mechanism 40 can be removed from the shaft assembly 22 for easy replacement.

[0033] The dimensions of the rotational area 2342 are larger than the diameter of the shaft portion where the stop surface 223 is located; that is, the minimum profile of the rotational area 2342 is larger than the rotational diameter of the chamfering axis. When the head mechanism 20 is in operation, the shaft assembly 22 moves within the rotational area 2342 and connects to the trimming mechanism 40. Specifically, when the latch assembly 23 moves until the rotational area 2342 is aligned with the chamfering axis, the shaft assembly 22 can rotate under the drive of the drive assembly 24, and accordingly, the latch assembly 23 is in the operating position.

[0034] The clamping hole 234 has different diameters in different areas to match the stop surface 223 of the shaft assembly 22. The operator can switch between the clamping area 2341 and the rotation area 2342 for easy operation. The shape of the rotation area 2342 can be set to a circular hole, a square hole, or other hole structures.

[0035] In this embodiment, when the locking assembly 23 slides relative to the housing 21, the engaging area 2341 engages the limiting stop surface 223 and locks the shaft assembly 22 at a corresponding angle, correspondingly placing the locking assembly 23 in the engaged position. The locking assembly 23 simply requires the operator to linearly move the locking assembly 23 to control the rotational state of the shaft assembly 22, making operation convenient. The locking assembly 23 enables high-precision assembly with minimal clearance, eliminating the risk of the movable parts becoming stuck by dirt or weeds.

[0036] like Figures 4 to 7 As shown, the latch assembly 23 slides along the housing 21, switching between a working position and a latching position. Optionally, the housing 21 defines the latching position of the latch assembly. In an alternative embodiment, one of the housing 21 and the latch assembly 23 is provided with a latching rib, and the other is provided with a lateral positioning groove. When the latching rib and the positioning groove are aligned, the latch assembly 23 is fixed in place relative to the housing 21, preventing malfunction due to vibration.

[0037] In one embodiment, the rotatable assembly 23 includes a snap plate 231 slidably mounted on the housing 21 and an elastic member 232 that elastically pushes against the snap plate 231. The snap plate 231, under the action of an elastic preload, maintains the shaft assembly 22 in the rotation zone 2342. The snap plate 231 is a long, plate-like structure, a block-like structure, or a structure with reinforcing ribs. The snap plate 231 slides on the housing 21, providing a stable shape and structural strength, thereby limiting the rotation of the shaft assembly 22.

[0038] The elastic preload of the elastic member 232 keeps the rotating area 2342 aligned with the rotating shaft assembly 22. This prevents the clamping plate 231 from malfunctioning when subjected to vibrations, while also allowing the operator to lock the rotating shaft assembly 22 in place with a simple press, providing a comfortable feel. The clamping plate 231 automatically resets upon removal of the pressing force, thereby automatically unlocking the rotating shaft assembly 22 and enhancing ease of use.

[0039] Preferably, one end of the clipping plate 231 extends beyond the housing 21. The clipping plate 231 is provided with a stopper that limits its sliding movement with the housing 21. One end of the clipping plate 231 serves as a pressing end, capable of being pressed externally. The stopper limits the sliding distance of the clipping plate 231, preventing it from separating from the housing 21. Preferably, the stopper is a rib protruding from either side of the clipping plate 231. The rib is wider than the opening of the sliding hole 212, thereby preventing the clipping plate 231 from separating from the housing 21.

[0040] In a preferred embodiment, the snap assembly 23 further includes a pressing member 233. The snap plate 231 pushes against the pressing member 233, partially extending out of the housing 21. The pressing member 233 slides into the sliding hole 212, with the end of the pressing member 233 extending out of the sliding hole 212 and beyond the outer surface of the housing 21. The elastic member 232 and the pressing member 233 are located at opposite ends of the snap plate 231, respectively. This allows the snap plate 231 to abut against the pressing member 233 under the elastic force of the elastic member 232. The pressing member 233 is limited to the housing 21 when the snap plate 231 abuts, and the sliding range of the pressing member 233 is controllable.

[0041] Preferably, the portion of the pressing member 233 located inside the housing 21 is provided with an annular convex edge to block the opening of the sliding hole 212 to prevent foreign matter from entering.

[0042] In one embodiment, the rotating shaft assembly 22 includes a rotating shaft 221 and a support bearing 222 mounted on the rotating shaft 221, and the support bearing 222 is embedded and assembled in the housing 21. The rotating shaft 221 is a stepped shaft structure, and the support bearing 222 is mounted on the rotating shaft 221. Optionally, the rotating shaft 221 includes a step portion, a first end and a second end protruding on both sides of the step portion, and a stop surface 223 is provided at the first end. The support bearing 222 is sleeved on the first end and confined to the step portion. The support bearing 222 is assembled and connected to the housing 21, so that the installation position of the rotating shaft assembly 22 is fixed and can rotate flexibly. Preferably, the housing 21 is provided with a mounting groove, and the support bearing 222 is confined to the mounting groove.

[0043] The first end of the rotating shaft 221 is in driving connection with the driving assembly 24. The stop surface 223 is provided on the rotating shaft 221 between the support bearing 222 and the driving assembly 24. The stop surface 223 is located within the housing 21 to cooperate with the locking assembly 23, which is located above the support bearing 222.

[0044] The second end of the rotating shaft 221 extends beyond the housing 21 and is provided with a connecting portion. The grass-cutting mechanism 40 is sleeved on the second end and removably secured to the connecting portion, thereby providing a transmission connection between the grass-cutting mechanism 40 and the rotating shaft 221. Preferably, the connecting portion is threaded, and the grass-cutting mechanism 40 is helically connected to the connecting portion.

[0045] In the above embodiment, the drive assembly 24 includes a drive motor 241, and the output shaft of the drive motor 241 is plugged into the rotating shaft assembly 22. The drive motor 241 is directly connected to the rotating shaft 221 in a direct drive manner, thereby increasing the rotation speed of the rotating shaft 221. Optionally, the output speed range of the drive motor 241 is 9000 rpm-12000 rpm. Further preferably, the operating voltage of the drive motor 241 is 12V. 12V can be provided by a battery pack to facilitate the operator to carry and hold, and the 12V battery pack can increase the power of the drive motor 241 and extend the battery life compared to the existing 9V operating voltage.

[0046] In one embodiment, the drive assembly 24 includes a mounting bracket 244 mounted on the drive motor 241 and a fan assembly 242. The mounting bracket 244 is mounted with a control board assembly 243. The mounting bracket 244 is a frame structure, and the drive motor 241 and the control board assembly 243 are mounted at opposite ends of the mounting bracket 244. This allows the drive motor 241 and the control board assembly 243 to be independently arranged, thereby preventing heat from being concentrated in one area. The fan assembly 242 is located between the drive motor 241 and the control board assembly 243, extracting heat from the middle and dissipating it outward, maintaining a stable operating temperature of the drive motor 241 and the control board assembly 243.

[0047] Preferably, mounting bracket 244 is provided with exhaust holes 245, which are spaced apart around the center of mounting bracket 244 to expand the air flow area. Housing 21 is provided with a plurality of heat dissipation holes 211 corresponding to exhaust holes 245. Heat dissipation holes 211 are elongated structures, which not only facilitate exhaust but also reduce the chance of foreign matter entering housing 21.

[0048] Preferably, four exhaust holes 245 are provided and spaced apart around the center of the driving motor 241 .

[0049] The lawn mower utilizes a lightweight design to reduce overall weight and improve weeding efficiency. The handle mechanism 10 comprises one or more handle rods 11, constructed from aluminum alloy tubing. The handle rods 11 are foldable or removable, allowing for various lengths of the handle mechanism 10, reducing transportation and storage space. The aluminum alloy tubing maintains or even improves structural strength, reduces overall weight, and reduces operator workload.

[0050] Furthermore, the housing 21 is made of aluminum alloy or plastic. Composed of two outer shells, the housing 21 can be made of aluminum alloy or plastic to reduce weight while maintaining or increasing strength. The housing 21 can be manufactured by casting or injection molding, resulting in high overall production efficiency, reduced costs, and improved assembly precision.

[0051] Preferably, an energy supply mechanism 30 is mounted at the end of the handle mechanism 10, and the energy supply mechanism 30 is electrically connected to the drive assembly 24. The energy supply mechanism 30 and the drive assembly 24 are located at both ends of the handle mechanism 10 to form a counterweight distribution. When the operator uses shoulder-type processing, the difficulty of operation can be reduced. The balance at both ends can even make the counterweight of the energy supply mechanism 30 larger, which can achieve an automatic lifting effect and reduce operating pressure.

[0052] In a preferred embodiment, the weight ratio between the end of the handle mechanism 10 where the energy supply mechanism 30 is located and the end of the handle mechanism 10 where the drive assembly 24 is located is B, where 1≤B≤5. When B equals 1, the energy supply mechanism 30 and the drive assembly 24 have essentially the same weight. The energy supply mechanism 30 can be connected to an external power source or a small battery. When B is greater than 1, the weight of the functional mechanism is greater and the weight of the drive assembly 24 is less, thereby forming a head-up weeding mechanism. The operator can control the height of the weeding plant by pressing and swinging the weeds.

[0053] like Figure 8 As shown, in one embodiment, a mowing mechanism 40 is removably mounted on the rotating shaft assembly 22 to provide a rotary cutting motion. The mowing mechanism 40 includes a sheave housing 41, a floating sheave 42, an anti-rotation member 43, and a preload spring 44. The sheave housing 41 is helically connected to the rotating shaft 221 to enable a quick connection between the two.

[0054] The sheave housing 41 has a sheave cavity 412, in which the floating sheave 42 and the preload spring 44 are located. The preload spring 44 elastically pushes the center of the floating sheave 42 to be pressed against the bottom of the sheave cavity 412. The anti-rotation part 43 passes through the sheave housing 41 and is plugged into the floating sheave 42 to limit the rotation of the floating sheave 42.

[0055] The floating sheave 42 is wound with a mowing rope, and the wall of the sheave cavity 412 is provided with a rope outlet hole 411, through which the mowing rope passes. The center of the rope outlet hole 411 and the floating sheave 42 are at a height such that the mowing rope can be engaged with the sheave housing 41.

[0056] It should be understood that the present application is not limited to the precise structure described above and shown in the accompanying drawings, and that various modifications and variations may be made without departing from the scope thereof. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed herein.

Claims

1. A lightweight lawn mower, comprising a handle mechanism, a head mechanism mounted on the handle mechanism, and a mowing mechanism detachably mounted on the head mechanism, characterized in that: The head mechanism includes a housing, a drive assembly mounted on the housing, a card assembly and a shaft assembly, the card assembly being slidably mounted on the housing, the card assembly being provided with a card hole, the shaft assembly passing through the card hole and being in transmission connection with the drive assembly, and the shaft assembly including two stop surfaces arranged opposite to each other; The clamping hole includes a clamping area and a rotation area, the width of the clamping area is greater than the distance between the two stop surfaces, and the width of the clamping area is smaller than the diameter of the shaft portion where the stop surfaces are located, and the size of the rotation area is greater than the diameter of the shaft portion where the stop surfaces are located; The rotating shaft assembly moves in the rotating area and is connected to the grass trimming mechanism; When the locking assembly slides relative to the housing, the locking area locks the stop surface and locks the rotating shaft assembly at a corresponding angle.

2. The lightweight grass trimmer according to claim 1, characterized in that: The sliding direction of the card rotation assembly is perpendicular to the rotation center line of the shaft assembly.

3. The lightweight grass trimmer according to claim 1, characterized in that: The card rotation assembly includes a card plate slidably arranged on the housing and an elastic member elastically pushing the card plate. The card plate keeps the rotating shaft assembly in the rotation zone under the action of the elastic preload force.

4. The lightweight grass trimmer according to claim 3, characterized in that: One end of the clamping plate passes through the housing, and the clamping plate is provided with a stopper that is limited in sliding with the housing; or, The card rotation assembly further includes a pressing piece, and the card plate pushes a portion of the pressing piece to pass through the housing.

5. The lightweight grass trimmer according to claim 1, characterized in that: The rotating shaft assembly includes a rotating shaft and a support bearing installed on the rotating shaft, the support bearing is embedded in the housing, the first end of the rotating shaft is transmission-connected to the drive assembly, the stop surface is provided on the rotating shaft between the support bearing and the drive assembly, the second end of the rotating shaft passes through the housing, and the second end is provided with a connecting portion.

6. The lightweight grass trimmer according to claim 1, characterized in that: The driving assembly includes a driving motor, and the output shaft of the driving motor is plug-connected to the rotating shaft assembly.

7. The lightweight grass trimmer according to claim 6, characterized in that: The drive assembly includes a mounting frame installed on the drive motor and a fan blade assembly, the mounting frame is installed with a control board assembly, the fan blade assembly is located between the drive motor and the control board assembly, the mounting frame is provided with exhaust holes, and the casing is provided with multiple heat dissipation holes corresponding to the exhaust holes.

8. The lightweight grass trimmer according to claim 6, characterized in that: The operating voltage of the drive motor is 12V.

9. The lightweight grass trimmer according to claim 1, characterized in that: The handle mechanism comprises one or more handle rods, the handle rods are made of a tube made of an aluminum alloy material, and the housing is made of an aluminum alloy material or a plastic material.

10. The lightweight grass trimmer according to claim 1, characterized in that: An energy supply mechanism is installed at the end of the handle mechanism, and the energy supply mechanism is electrically connected to the drive assembly. The weight ratio between the end of the handle mechanism where the energy supply mechanism is located and the end of the handle mechanism where the drive assembly is located is B, 1≤B≤5.

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