Garden tool

Abstract

The utility model relates to a gardening tool which comprises a shell extending in the axial direction, a power assembly contained in the shell and a battery pack connected to the shell. The shell comprises an air inlet located at the axial rear end, an air outlet located at the axial front end, an airflow channel connected with the air inlet and the air outlet and a mounting part used for being connected with the battery pack, and the mounting part at least partially coincides with the airflow channel in the vertical direction perpendicular to the axial direction; the mounting part comprises a containing cavity at least partially containing the battery pack and protection parts located on the two transverse sides of the containing cavity, the containing cavity axially penetrates through the shell backwards, the axial rear end of each protection part is of a closed structure, the shell strength on the two sides of the battery pack is improved, and therefore the battery pack is protected.

Description

Technical Field

[0001] The utility model relates to a gardening tool, in particular to a gardening tool which can effectively protect a battery pack. Background Art

[0002] A hair dryer is a commonly used garden tool, which includes a shell, a motor and a fan accommodated in the shell, and a battery pack connected to the shell. The motor drives the fan to generate a rotating airflow to gather debris. The shell includes an air inlet for air flow to enter, an air outlet arranged opposite to the air inlet, and a mounting portion for connecting the battery pack.

[0003] In order to make the hair dryers on the market compact or small, the battery pack is connected to the rear end of the shell and the air inlet is arranged on the lower side or left and right sides of the mounting part. This reduces the structural strength of the mounting part, which is easy to break when the hair dryer falls accidentally, and fails to provide sufficient fall protection for the battery pack.

[0004] In view of this, it is necessary to provide an improved garden tool to overcome the defects of the prior art. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a garden tool that can effectively protect a battery pack.

[0006] The utility model can solve the problems of the prior art by adopting the following technical solutions: a garden tool, comprising a shell extending in an axial direction, a power assembly accommodated in the shell and a battery pack connected to the shell, the shell comprising an air inlet located at an axial rear end, an air outlet located at an axial front end, an air flow channel connecting the air inlet and the air outlet, and a mounting portion for connecting the battery pack, the mounting portion at least partially overlaps with the air flow channel in a vertical direction perpendicular to the axial direction; the mounting portion comprises a accommodating cavity for at least partially accommodating the battery pack and protective portions located on both lateral sides of the accommodating cavity, the accommodating cavity penetrates the shell axially backward, and the axial rear end of the protective portion is a closed structure.

[0007] A further improved solution is: the mounting portion is located on the upper side of the air inlet, and a fluid partition is provided between the protection portion and the air flow channel.

[0008] A further improvement scheme is: the garden tool includes an air inlet cover detachably connected to the axial rear end of the shell, the air inlet cover includes an air inlet part covering the air inlet and a covering part covering the protective part, the air inlet part includes a plurality of air inlet holes, and the covering part covers the axial rear end of the protective part so that the protective part constitutes a closed structure.

[0009] A further improvement is as follows: the protection portion includes a first side wall constituting the inner wall of the accommodating cavity, an axially extending second side wall, and a third side wall connected to the axial front ends of the first side wall and the second side wall, and the third side wall and the second side wall are connected to the inner wall of the shell to separate the protection portion from the fluid in the airflow channel.

[0010] A further improvement is: the power assembly includes a motor electrically connected to the battery pack and a fan driven to rotate by the motor, and the ratio of the vertical dimension of the air inlet to the dimension of the center of the fan from the bottom of the shell is greater than or equal to 0.5 and less than or equal to 1.5.

[0011] A further improvement scheme is: the shell includes a side air inlet that connects the air flow channel with the outside air in the horizontal direction, the side air inlet is respectively located on both sides of the shell in the horizontal direction and is arranged close to the air inlet, and the axial dimension of the side air inlet is less than or equal to the axial dimension of the mounting portion.

[0012] A further improved solution is: the shell includes a lower air inlet located at the bottom, the lower air inlet is arranged close to the air inlet and the axial dimension of the lower air inlet is less than or equal to the axial dimension of the mounting portion.

[0013] A further improved solution is: the garden tool comprises a controller electrically connected to the power assembly, and the controller is obliquely arranged on the axial front side of the mounting portion.

[0014] A further improved solution is: the garden tool includes a grip portion connected to the top side of the shell, a partition portion is formed between the axial rear end of the grip portion and the mounting portion, the rear wall of the partition portion at least partially constitutes the inner wall of the accommodating cavity and extends upward beyond the accommodating cavity, and the partition portion includes a fixed space for accommodating the controller.

[0015] A further improved solution is: the partition portion includes a first opening connecting the fixed space with the outside air and a second opening connecting the fixed space with the air flow channel.

[0016] Compared with the prior art, the utility model has the following beneficial effects: by not providing any air holes in the protection part, the strength of both sides of the battery pack is increased, thereby providing sufficient protection for the battery pack when the garden tool accidentally falls; in addition, the protection part is separated from the fluid of the air flow channel, thereby preventing the airflow that is about to enter the air inlet from entering the protection part, hitting the inside of the protection part and forming turbulence to increase the noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a garden tool according to a preferred embodiment of the utility model;

[0018] Figure 2 for Figure 1 A front view of the garden tool shown;

[0019] Figure 3 for Figure 1 The schematic diagram of the structure of the garden tool without the battery pack shown;

[0020] Figure 4 for Figure 3 A schematic diagram of the structure of the garden tool from another angle shown;

[0021] Figure 5 for Figure 1 A cross-sectional view of a garden tool is shown.

[0022] Meaning of the reference numerals in the figures:

[0023] Hair dryer 100 Housing 10

[0024] Air inlet area 101 Air outlet area 102

[0025] Connection area 103 Air inlet 11

[0026] Air outlet 12 Mounting portion 13

[0027] Accommodating chamber 131 Protecting portion 132

[0028] First side wall 133 Second side wall 134

[0029] The third side wall 135 side air inlet 14

[0030] Lower air inlet 15 Grip 20

[0031] Partition 21 Fixed space 211

[0032] Battery pack 30 Motor 40

[0033] Power shaft 41 Fan 50

[0034] Hub 51 Fan blade 52

[0035] Air inlet cover 60 Air inlet part 61

[0036] Air inlet 611 Covering part 62

[0037] Controller 70 DETAILED DESCRIPTION

[0038] The utility model is further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0039] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the following words indicating orientation or positional relationship, such as "upper", "lower", "front", "rear", "axial", "lateral", "vertical", "circumferential", "radial", etc., are only based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0040] Please refer to Figures 1 to 4 As shown, the utility model relates to a garden tool, in particular to a portable hair dryer 100, comprising a shell 10 extending axially, a power assembly accommodated in the shell 10, a grip portion 20 connected to the top side of the shell 10, and a battery pack 30 detachably connected to the axial rear end of the shell 10.

[0041] The housing 10 includes an air inlet area 101 located at an axial rear end, an air outlet area 102 located at an axial front end, and a connection area 103 connecting the air inlet area 101 and the air outlet area 102. The housing 10 includes an air inlet 11 located at an axial rear end of the air inlet area 101, an air outlet 12 located at an axial front end of the air inlet area 101, and an air flow channel connecting the air inlet 11 and the air outlet 12, and the air flow channel passes through the air inlet area 101, the connection area 103, and the air outlet area 102 in the axial direction.

[0042] Combination Figure 5 As shown, the power assembly includes a motor 40 electrically connected to the battery pack 30 and a fan 50 driven to rotate by the motor 40. The motor 40 includes a power shaft 41 extending in the axial direction, and the fan 50 includes a hub 51 fixed to the power shaft 41 and blades 52 extending from the hub 51. The motor 40 drives the fan 50 to rotate to form a working airflow flowing in the airflow channel.

[0043] The axial front end of the holding portion 20 is connected to the top of the connecting area 103, and the axial rear end is connected to the top of the air inlet area 101. The axial front end of the holding portion 20 is higher than the axial rear end in the vertical direction, and its extension direction forms an angle less than or equal to 30° with the axial direction, thereby providing the user with a more comfortable grip and conforming to ergonomics.

[0044] The housing 10 includes a mounting portion 13 for connecting the battery pack 30. The mounting portion 13 is located at the axial rear side of the grip portion 20 and the mounting portion 13 at least partially overlaps with the airflow channel in the vertical direction perpendicular to the axial direction. That is, the mounting portion 13 protrudes into the airflow channel in the vertical direction, and the battery pack 30 protrudes into the housing 10 after being connected to the mounting portion 13, thereby reducing the size of the portable hair dryer 100 in the vertical direction. In addition, the mounting portion 13 is tilted at an angle greater than or equal to 60° relative to the axial direction at the rear end of the grip portion 20 and the housing 10, further reducing the size of the portable hair dryer 100 in the vertical direction.

[0045] The mounting portion 13 is axially located substantially in the air inlet region 101 of the housing 10 and on the upper side of the air inlet 11, and includes a receiving cavity 131 for at least partially receiving the battery pack 30 and protective portions 132 located on both lateral sides of the receiving cavity 131. The receiving cavity 131 axially penetrates the rear end of the housing 10 backward, so that the receiving cavity 131 is axially open backward, which facilitates the portable hair dryer 100 to adapt to battery packs 30 of different sizes.

[0046] Two protection parts 132 are symmetrically arranged on both sides of the accommodating cavity 131. Each protection part 132 includes a first side wall 133 constituting one of the inner walls of the accommodating cavity 131, a second side wall 134 extending axially, and a third side wall 135 connecting the first side wall 133 and the second side wall 134. The first side wall 133, the second side wall 134, and the third side wall 135 are all closed structures. The second side wall 134 and the third side wall 135 of the protection part 132 are connected to the inner side wall of the housing 10, and the outer side wall of the second side wall 134 and the third side wall 135 of the protection part 132 constitutes the inner side wall of the airflow channel. The first side wall 133, the second side wall 134, and the third side wall 135 physically separate the protection part 132 from the airflow channel, so that the protection part 132 is fluid-isolated from the airflow channel.

[0047] The "fluid isolation setting" described in this article means that two structures or parts are spaced from each other and the objects used for spacing are all closed structures without pores, so that there is no fluid connection relationship between the two structures or parts.

[0048] Combination Figure 3 and Figure 4As shown, the portable hair dryer 100 includes an air inlet cover 60 detachably connected to the axial rear end of the housing 10, and the air inlet cover 60 includes an air inlet portion 61 covering the axial rear end of the air inlet 11 and a cover portion 62 covering the axial rear end of the protection portion 132. The air inlet portion 61 includes a plurality of air inlet holes 611 for connecting the air flow channel with the outside air. The cover portion 62 is configured as a closed structure without air holes and covers the axial rear end of the protection portion 132, so that the axial rear end of the protection portion 132 constitutes a closed structure isolated from the outside air.

[0049] The protection portion 132 does not have any air holes, so that the strength of both sides of the battery pack 30 is increased, thereby providing sufficient protection for the battery pack 30 when the garden tool accidentally falls; in addition, the axial rear end of the protection portion 132 is closed by the covering portion 62 of the air inlet cover 60, and the protection portion 132 is physically separated from the air flow channel by the second side wall 134 and the third side wall 135, thereby preventing the airflow that is about to enter the air inlet 11 from entering the protection portion 132, hitting the inside of the protection portion 132 and forming turbulence to increase noise.

[0050] In the present embodiment, the closed structure at the axial rear end of the protection portion 132 is covered by the covering portion 62 of the air inlet cover 60 at its axial rear end to be isolated from the outside world; in other embodiments, the air inlet cover 60 may be eliminated, the covering portion 62 and the protection portion 132 may be integrally arranged and a plurality of air inlet holes 611 may be integrally formed on the rear end wall of the shell 10, thereby preventing debris from entering the shell 10 to damage the power component.

[0051] The axial dimension of the protection portion 132 is greater than or equal to the axial dimension of the accommodating cavity 131. The axial rear end surface of the protection portion 132 can be flush with the air inlet 11 at the axial rear end of the shell 10, or it can extend axially backward beyond the air inlet 11, so that the protection portion 132 can axially cover most of the area of ​​the battery pack 30, thereby effectively protecting the battery pack 30 in the axial direction.

[0052] In this embodiment, the size of the protection portion 132 in the vertical direction is smaller than the size of the axial rear end of the grip portion 20, and the top surface of the protection portion 132 is flush with the top surface of the housing 10, so that the protection portion 132 covers at least half of the height of the battery pack 30 in the vertical direction, thereby effectively protecting the battery pack 30 in the vertical direction. Of course, in other embodiments, the protection portion 132 may also extend upward in the vertical direction beyond the top surface of the housing 10, or even extend to be flush with the top surface of the axial rear end of the grip portion 20, thereby completely covering the three surfaces of the battery pack 30 in the vertical direction.

[0053] The air inlet 11 is disposed at the lower side of the mounting portion 13, and it penetrates the entire rear end surface of the housing 10 in the horizontal direction. The protection portion 132 at least partially overlaps with the airflow channel in the vertical direction and is separated from the airflow channel fluid. The smaller the size of the protection portion 132 protruding into the airflow channel in the vertical direction, the less effective the battery pack 30 is. The larger the size of the protection portion 132 protruding into the airflow channel in the vertical direction, the larger the area of ​​the air inlet 11 located at the lower side of the protection portion 132, thereby reducing the air intake efficiency.

[0054] The fan 50 is fixed to the power shaft 41 and has a center point approximately located on the power shaft 41. After the fan 50 rotates, the larger the opening area of ​​the air inlet 11, the higher the air volume and wind speed. In order to balance the protection of the battery pack 30 and the air intake efficiency while ensuring the height of the whole machine, it is particularly important to reasonably set the vertical height of the protection portion 132 and the air inlet 11. The following will explain in detail the influence of the different ratios of the vertical dimensions of the air inlet 11 and the dimensions of the center of the fan 50 from the bottom of the housing 10 on the air volume and wind speed:

[0055] When the ratio of the vertical dimension of the air inlet 11 to the dimension of the center of the fan 50 from the bottom of the shell 10 is 0.5, the air volume and wind speed obtained by fluid analysis are 0.0417 kg / s and 21.65 m / s, respectively. The air volume and wind speed at this time are relatively low, meeting the more basic functional requirements of the portable hair dryer 100 of this embodiment, but the usage scenarios are relatively limited.

[0056] When the ratio of the vertical dimension of the air inlet 11 to the dimension of the center of the fan 50 from the bottom of the shell 10 is 0.75, the air volume and wind speed obtained by fluid analysis are 0.0626 kg / s and 32.47 m / s, respectively. At this time, the air volume and wind speed can meet various working conditions such as indoors or outdoors.

[0057] When the ratio of the vertical dimension of the air inlet 11 to the dimension of the center of the fan 50 from the bottom of the shell 10 is further increased to 0.85 or 1.0, the air volume obtained by fluid analysis is 0.0709 kg / s and 0.0834 kg / s, and the wind speed is 36.81 m / s and 43.32 m / s, respectively. The air volume and wind speed can blow away some heavier fallen leaves or debris.

[0058] When the ratio of the vertical dimension of the air inlet 11 to the dimension of the center of the fan 50 from the bottom of the shell 10 is further increased to 1.36 or 1.5, the air volume obtained by fluid analysis is 0.095 kg / s and 0.108 kg / s, and the wind speed is 49.20 m / s and 64.95 m / s respectively. At this time, the air volume and wind speed are relatively high, which can cope with a variety of complex working conditions, such as the collection of leaves, gravel and branches on roads or courtyards after rain.

[0059] Therefore, the ratio of the size of the air inlet 11 to the size of the center of the fan 50 from the bottom of the shell 10 is set to be greater than or equal to 0.5 and less than or equal to 1.5. At this time, the vertical dimension of the protection part 132 is at least half of the height of the battery pack 30, which can not only meet the demand of enhancing the hardness of the protection part 132 to protect the battery pack 30, but also ensure the functional requirements of the air volume and wind speed of the portable hair dryer 100.

[0060] In order to further improve the air intake efficiency, the portable hair dryer 100 of the utility model can also be provided with side air inlets 14 in the lateral direction of the housing 10, which connect the airflow channel and the outside air. The side air inlets 14 are respectively located on both lateral sides of the housing 10 and are arranged close to the air inlet 11. In order to ensure that the entry point of the airflow is concentrated in the air intake area 101 of the housing 10, the side air inlet 14 is arranged axially backward close to the air inlet 11 and its axial dimension is less than or equal to the axial dimension of the mounting portion 13. The airflow is concentrated in the air intake area 101 to enter the airflow channel of the housing 10, which can avoid the turbulence caused by the branch airflow converging and reduce the air intake efficiency or increase the noise.

[0061] Of course, in addition to the side air inlet 14 opened on the side of the shell 10, the shell 10 also includes a lower air inlet 15 located at the bottom. In order to ensure the concentration of airflow entering, the lower air inlet 15 is axially close to the air inlet 11 and the axial dimension of the lower air inlet 15 is less than or equal to the axial dimension of the mounting portion 13.

[0062] refer to Figure 5 As shown, the portable hair dryer 100 includes a controller 70 electrically connected to the power assembly, and the controller 70 is obliquely arranged at the axial front side of the mounting portion 13. A spacer 21 is formed between the axial rear end of the grip portion 20 and the mounting portion 13, and the rear wall of the spacer 21 at least partially constitutes the inner wall of the accommodating cavity 131 and extends upward beyond the accommodating cavity 131 to guide and fix the battery pack 30. A fixed space 211 for accommodating the controller 70 is provided in the spacer 21, and the grip portion 20 and the housing 10 are separated by a gripping space for the user to grip.

[0063] In order to facilitate the heat dissipation of the controller 70, the spacer 21 includes a first opening connecting the fixed space 211 with the outside air and a second opening connecting the fixed space 211 with the airflow channel. The first opening can be provided at the front side of the rear end of the gripping portion 20 facing the gripping space, thereby connecting the fixed space 211 with the gripping space; in addition, the first opening can also be provided at the top surface or the two lateral sides of the rear end of the gripping portion 20, thereby connecting the fixed space 211 with the outside air. When the portable hair dryer 100 is working, the fan 50 rotates so that the air pressure in the airflow channel is lower than the outside air pressure, so that a part of the airflow enters the fixed space 211 from the first opening under the action of the air pressure difference, passes through the surface of the controller 70 and takes away the heat of the controller 70, and then merges into the main airflow in the airflow channel from the second opening, thereby cooling the controller 70.

[0064] The utility model is not limited to the above specific implementations. Those skilled in the art can easily understand that there are many alternatives to the gardening tool of the utility model without departing from the principle and scope of the utility model. The protection scope of the utility model shall be based on the content of the claims.

Claims

1. A garden tool, comprising a shell extending in an axial direction, a power assembly accommodated in the shell, and a battery pack connected to the shell, the shell comprising an air inlet located at an axial rear end, an air outlet located at an axial front end, an air flow channel connecting the air inlet and the air outlet, and a mounting portion for connecting the battery pack, the mounting portion at least partially overlaps with the air flow channel in a vertical direction perpendicular to the axial direction; characterized in that: The mounting portion includes a housing cavity for at least partially housing the battery pack and protective portions located on both lateral sides of the housing cavity. The housing cavity axially penetrates the shell backward, and the axial rear end of the protective portion is a closed structure.

2. The garden tool according to claim 1, characterized in that: The mounting portion is located on the upper side of the air inlet, and a fluid partition is provided between the protection portion and the air flow channel.

3. The garden tool according to claim 2, characterized in that: The garden tool includes an air inlet cover detachably connected to the axial rear end of the shell, the air inlet cover includes an air inlet portion covering the air inlet and a covering portion covering the protection portion, the air inlet portion includes a plurality of air inlet holes, and the covering portion covers the axial rear end of the protection portion so that the protection portion is formed into a closed structure.

4. The garden tool according to claim 2, characterized in that: The protection portion includes a first side wall constituting the inner wall of the accommodating cavity, an axially extending second side wall, and a third side wall connected to the axial front ends of the first side wall and the second side wall, and the third side wall and the second side wall are connected to the inner side wall of the shell to separate the protection portion from the fluid in the airflow channel.

5. The garden tool according to claim 1, characterized in that: The power assembly includes a motor electrically connected to the battery pack and a fan driven to rotate by the motor, and the ratio of the vertical dimension of the air inlet to the dimension of the center of the fan from the bottom of the shell is greater than or equal to 0.5 and less than or equal to 1.

5.

6. The garden tool according to claim 5, characterized in that: The shell includes side air inlets that connect the air flow channel with the outside air in the transverse direction. The side air inlets are respectively located on both sides of the shell in the transverse direction and are arranged close to the air inlet. The axial dimension of the side air inlet is less than or equal to the axial dimension of the mounting portion.

7. The garden tool according to claim 5, characterized in that: The shell includes a lower air inlet located at the bottom, the lower air inlet is arranged close to the air inlet and the axial dimension of the lower air inlet is less than or equal to the axial dimension of the mounting portion.

8. The garden tool according to claim 1, characterized in that: The garden tool comprises a controller electrically connected to the power assembly, and the controller is obliquely arranged on the axial front side of the mounting portion.

9. The garden tool according to claim 8, characterized in that: The garden tool includes a grip portion connected to the top side of the shell, a spacer portion is formed between the axial rear end of the grip portion and the mounting portion, a rear wall of the spacer portion at least partially constitutes an inner wall of the accommodating cavity and extends upward beyond the accommodating cavity, and the spacer portion includes a fixed space for accommodating the controller.

10. The garden tool according to claim 9, characterized in that: The partition portion includes a first opening communicating with the fixed space and external air, and a second opening communicating with the fixed space and the air flow channel.

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