CN211671362U

CN211671362U - Grass trimmer

Info

Publication number: CN211671362U
Application number: CN201922296914.8U
Authority: CN
Inventors: 朱敬成; 许折折
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-10-16
Anticipated expiration: 2029-12-19

Abstract

The utility model provides a grass trimmer, including operating means, the head of beating the grass and extension rod, the extension rod is connected operating means with the head of beating the grass. The grass mowing head comprises a shell, a motor and a cutting device, wherein the shell is provided with a containing cavity, and the motor is contained in the containing cavity and provided with a motor shaft for driving the cutting device to rotate. The top of the motor is provided with a fan blade, and the top of the casing is provided with an air outlet adjacent to the fan blade. The fan blades and the air outlet of the mower are arranged at the top of the machine shell, so that the situation that broken grass scraps enter the interior of the machine shell to influence the normal use of the motor can be avoided, and the service life of the motor of the mower is prolonged.

Description

Grass trimmer

Technical Field

The utility model relates to a grass trimmer especially relates to a grass trimmer with fan blade.

Background

With the advance of urban greening process, the green belts of gardens, lawns and the like are increasing, and the application of the grass trimmer is also wider and wider. The grass trimmer is mainly used for trimming the lawn, the conventional grass trimmer is a portable rope-coiled grass trimmer, the cost of the grass trimmer is high due to the fact that gasoline is used as fuel for driving, and the grass trimmer is slowly driven by a motor. Typically, a lawnmower has a head for mowing, a handle for a user to hold, and a connecting rod connecting the head and the handle. The head is internally provided with a driving motor and a cutting device, and the cutting device is driven by the motor to rotate to perform cutting operation. The motor during operation can produce a large amount of heats, and head space is narrow and small, and current heat radiation structure can't be effectual fast for the motor heat dissipation.

Therefore, there is a need for an improved grass trimmer that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a grass trimmer, which can effectively dissipate heat of a motor and prolong the service life of the motor.

Specifically, the utility model discloses a realize through following technical scheme: the utility model provides a grass trimmer, includes operating means, the head of beating grass and extension rod, the extension rod is connected operating means with the head of beating grass, the head of beating grass includes casing, motor and cutting device, the casing is equipped with and holds the chamber, the motor holds hold the intracavity and be equipped with the drive cutting device pivoted motor shaft, the motor top is equipped with the fan blade, the top of casing is equipped with and borders on the air outlet of fan blade.

According to an embodiment of the utility model, the extension rod include with the lower beam that the casing is connected, the lower beam be equipped with hold the well cavity of chamber intercommunication, and with a plurality of air intakes of well cavity intercommunication.

According to an embodiment of the present invention, the hollow cavity with the junction that holds the chamber is located the downside of fan blade.

According to the utility model discloses an embodiment, the motor is equipped with the coil and passes through the clearance of coil.

According to the utility model discloses an embodiment, the fan blade with the integrative setting of motor, the fan blade is the axial-flow type fan blade.

According to the utility model discloses an embodiment, the casing still is equipped with a plurality of edges the water conservancy diversion muscle that casing circumference dispersion set up, and each the water conservancy diversion muscle incline sets up.

According to an embodiment of the invention, a plurality of the flow guiding ribs are arranged obliquely in a clockwise direction.

According to an embodiment of the present invention, the plurality of the flow guiding ribs are obliquely arranged along the counterclockwise direction.

According to the utility model discloses an embodiment, the casing includes the main part and installs the motor cover at main part top, the motor cover covers the top of fan blade, the motor cover with form between the main part the air outlet, the water conservancy diversion muscle forms the motor covers.

According to the utility model discloses an embodiment, the motor cover be equipped with the roof and certainly the lateral wall of roof edge downwardly extending all around, the water conservancy diversion muscle sets up on the lateral wall.

The fan blades and the air outlet of the mower are arranged at the top of the machine shell, so that the situation that broken grass scraps enter the interior of the machine shell to influence the normal use of the motor can be avoided, and the service life of the motor of the mower is prolonged.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

Fig. 1 is a perspective combination view of a grass trimmer according to an embodiment of the present invention.

FIG. 2 is a perspective view of the grass cutting head of the grass trimmer.

FIG. 3 is a partial perspective view of the lawnmower.

FIG. 4 is a partial cross-sectional view of the lawnmower.

FIG. 5 is a perspective view of the grass cutting head of the grass trimmer with the motor cover and grass cord of the grass cutting head removed.

Fig. 6 is a perspective view of the motor cover.

The reference numbers illustrate:

the grass cutting machine comprises an operating device 1, a grass cutting head 2, a machine shell 21, an accommodating cavity 210, an air outlet 211, a main body 212, a motor cover 213, a flow guide rib 214, a top wall 215, a side wall 216, a motor 22, a motor shaft 221, a coil 222, a gap 223, a cutting device 23, a grass cutting rope 231, an extension rod 3, a lower rod 31, a hollow cavity 310, an air inlet 311, an upper rod 32, a handle 4, a protective cover 5 and fan blades 6.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of devices, systems, apparatuses, and methods consistent with certain aspects of the invention, as detailed in the following claims. In order to avoid obscuring the invention with unnecessary details, only the structures and/or process steps that are closely related to the aspects of the invention are shown in the drawings, while other details that are not relevant to the invention are omitted.

Referring to fig. 1, according to the utility model discloses a grass trimmer of an embodiment is a hand-held type grass trimmer, including operating means 1, the head of beating the grass 2 and extension rod 3, extension rod 3 connects operating means 1 and the head of beating the grass 2. The extension rod 3 is also provided with a handle 4, and an operator can control the grass trimmer by holding the operating device 1 with one hand and holding the handle 4 with the other hand. The grass cutting head 2 is close to the lawn, and the side, close to the extension rod 3, of the grass cutting head 2 is further provided with a protective cover 5, so that stones, grass clippings and tree branches and roots splashed in the grass cutting process can be prevented from flying out all around, and the safety of operators and passersby is endangered.

Referring to fig. 2 to 4, the grass-mowing head 2 comprises a machine shell 21, a motor 22 and a cutting device 23, wherein the machine shell 21 is provided with a containing cavity 210, and the motor 22 is contained in the containing cavity 210. The cutting device 23 is provided with a grass cutting rope 231 for cutting grass, the motor 22 is provided with a motor shaft 221, and the cutting device 23 is connected with the motor shaft 221 so as to cut under the driving of the motor 22. The top of the motor 22 is provided with a fan blade 6, and the top of the casing 21 is provided with an air outlet 211 adjacent to the fan blade 6. When the fan blade 6 rotates, heat generated by the bottom-side motor 22 during operation can be blown to the air outlet 211, so that quick heat dissipation of the motor 22 can be realized. The utility model discloses lawn mower sets up fan blade 6 and air outlet 211 at the top of casing 21, can keep away from the lawn relatively, avoids the smashed grass bits to get into inside casing 21 and influence the normal use of motor 22, prolongs the motor 22 working life of the machine of beating the grass.

The extension rod 3 includes a lower rod 31 connected to the housing 21 and an upper rod 32 connected to the operating device 1, wherein the lower rod 31 is provided with a hollow cavity 310 communicated with the accommodating cavity 210 of the housing 21 and a plurality of air inlets 311 communicated with the hollow cavity 310. The air in the casing 21 forms negative pressure in the rotation of the fan blade 6, and the cold air enters the accommodating cavity 210 from the air inlet 311 through the hollow cavity 310. Since the cold air is heavier, it flows to the bottom of the accommodating chamber 210, absorbs heat of the motor 22, becomes lighter and flows upward, passes through the motor 22, and flows out through the air outlet 211 at the top of the housing 21. The connection between the hollow cavity 310 and the accommodating cavity 210 is located at the lower side of the fan blade 6, so as to prevent the entering cold air from being directly blown out of the casing 21 by the fan blade 6.

The motor 22 is provided with a coil 222 and a gap 223 passing through the coil 222, cold air entering from the air inlet 311 reaches the bottom of the motor 22, then passes through the gap 223 from bottom to top and flows out from the air outlet 211 at the top of the machine shell 21, and heat on the coil 222 of the motor 22 can be taken away. In this embodiment, the fan 6 is integrated with the motor 22, and the fan 6 is an axial-flow fan and is driven by the motor shaft 221 to rotate.

Referring to fig. 3 and fig. 5 and 6, the housing 21 includes a main body 212 and a motor cover 213 mounted on the top of the main body 212, the motor cover 213 covers the top of the fan blade 6, the air outlet 211 is formed between the motor cover 213 and the main body 212, and the air outlet 211 is formed by the motor cover 213 and the main body 212 together, so that the forming is simple.

The top of the casing 21 is further provided with a plurality of circumferentially distributed flow guiding ribs 214, and each flow guiding rib 214 is disposed in a radially inclined manner with respect to the radial direction thereof, and is used for guiding hot air to the air outlet 211. Specifically, the motor cover 213 has a top wall 215 and a side wall 216 extending downward from the peripheral edge of the top wall 215, and the air guide rib 214 is disposed on the side wall 216. Fig. 6 is a view of the motor cover 213 with its bottom surface facing upward, and the plurality of air guide ribs 214 in fig. 6 are disposed obliquely clockwise, and when the motor cover 213 is assembled to the main body 212, the plurality of air guide ribs 214 are actually disposed obliquely counterclockwise, so that the hot air flows counterclockwise, and the heat dissipation effect is prevented from being affected by the irregular flow of the hot air. As a simple alternative, the plurality of flow guiding ribs 214 may also be disposed in a clockwise direction, so as to enable the hot air to flow clockwise, and also to guide the hot air to flow out from the air outlet 211.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a grass trimmer, includes operating means, grass trimming head and extension rod, the extension rod is connected operating means with grass trimming head, grass trimming head includes casing, motor and cutting device, the casing is equipped with and holds the chamber, the motor holds hold the intracavity and be equipped with the drive cutting device pivoted motor shaft, its characterized in that: the top of the motor is provided with a fan blade, and the top of the casing is provided with an air outlet adjacent to the fan blade.

2. A lawnmower according to claim 1, wherein: the extension rod comprises a lower rod connected with the casing, and the lower rod is provided with a hollow cavity communicated with the accommodating cavity and a plurality of air inlets communicated with the hollow cavity.

3. A lawnmower according to claim 2, wherein: the connecting part of the hollow cavity and the containing cavity is positioned at the lower side of the fan blade.

4. A lawnmower according to claim 2, wherein: the motor is provided with a coil and a gap passing through the coil.

5. A lawnmower according to claim 2, wherein: the fan blade and the motor are integrally arranged, and the fan blade is an axial-flow fan blade.

6. A lawnmower according to claim 1, wherein: the casing is also provided with a plurality of diversion ribs which are dispersedly arranged along the circumferential direction of the casing, and each diversion rib is obliquely arranged.

7. A lawnmower according to claim 6, wherein: the plurality of flow guide ribs are obliquely arranged along the clockwise direction.

8. A lawnmower according to claim 6, wherein: the plurality of flow guide ribs are obliquely arranged along the anticlockwise direction.

9. A lawnmower according to claim 6, wherein: the casing includes the main part and installs the motor cover at the main part top, the motor cover is in the top of fan blade, the motor cover with form between the main part the air outlet, the water conservancy diversion muscle is formed on the motor cover.

10. A lawnmower according to claim 9, wherein: the motor cover is provided with a top wall and a side wall extending downwards from the peripheral edge of the top wall, and the flow guide ribs are arranged on the side wall.