Garden tool

Abstract

The utility model provides a gardening tool which comprises a controller, a motor and a heat dissipation assembly for heat dissipation of the motor and the controller, the heat dissipation assembly comprises a shell, and the shell is provided with a first air inlet, a second air inlet and an air outlet; the heat dissipation fan is contained in the shell, and a controller heat dissipation air channel from the first air inlet to the air outlet and a motor heat dissipation air channel from the second air inlet to the air outlet are formed when the heat dissipation fan works; wherein the controller is at least partially located in the controller heat dissipation air channel, and the motor is at least partially located in the motor heat dissipation air channel. According to the gardening tool, the two independent air channels are provided for heat dissipation of the controller and the motor, and the heat dissipation efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of garden tool technology, and in particular to a garden tool with good heat dissipation effect. Background Technology

[0002] Garden tools refer to mechanical tools used for trimming lawns, vegetation, etc., including lawn rakes, lawn mowers, and other garden maintenance machines, commonly used in residential gardens, parks, and other similar settings. The walking mechanism of a garden tool propels it across the lawn, while the blades rotate at high speed driven by a mowing motor to cut the grass.

[0003] When the blades rotate at high speed, the motor, as the drive mechanism, generates significant heat. Additionally, the controller, which operates the motor, also generates considerable heat. Therefore, cooling measures are necessary for both the motor and the controller to maintain stable performance. However, the cooling efficiency of the motor and controller currently needs improvement. Summary of the Invention

[0004] The purpose of this application is to provide a garden tool that improves heat dissipation by setting two air ducts in the housing to dissipate heat from the controller and motor respectively.

[0005] To achieve one of the aforementioned objectives, one embodiment of this application provides a garden tool, including a controller, a motor, and a heat dissipation assembly for cooling the motor and the controller, the heat dissipation assembly comprising:

[0006] The housing is provided with a first air inlet, a second air inlet, and an air outlet;

[0007] A cooling fan, which is housed in the housing, and forms a controller cooling duct from the first air inlet to the air outlet and a motor cooling duct from the second air inlet to the air outlet when in operation;

[0008] The controller is located at least partially within the controller cooling duct, and the motor is located at least partially within the motor cooling duct.

[0009] In one embodiment of this application, the first air inlet and the second air inlet are located on opposite sides of the housing, and the air outlet is located between the first air inlet and the second air inlet. The airflow in the controller cooling duct and the motor cooling duct converges inside the housing and is discharged through the air outlet.

[0010] In one embodiment of this application, the housing is configured as a volute, and the output shaft of the motor extends at least partially into the volute and is connected to the cooling fan to drive the cooling fan.

[0011] In one embodiment of this application, the volute includes an air inlet channel and an air outlet channel. The airflow inside the volute is in a roughly circular direction in the air inlet channel, and the airflow in the air outlet channel is tangent to the airflow in the air inlet channel. The air outlet is located at the outlet of the air outlet channel.

[0012] In one embodiment of this application, the housing further includes a receiving portion communicating with the volute, the receiving portion being used to receive the motor, the air intake direction of the first air inlet being in the same direction as the axial direction of the motor and the cooling fan, and the first air inlet being disposed on the side of the volute away from the receiving portion.

[0013] In one embodiment of this application, the receiving part is cylindrically connected to one side of the volute, and at least two second air inlets are provided, with the at least two second air inlets spaced apart on the side wall of the receiving part.

[0014] In one embodiment of this application, the controller is disposed outside the first air inlet, and a plurality of heat sinks are disposed on the side of the controller near the first air inlet.

[0015] In one embodiment of this application, in the air intake direction of the first air inlet, the projection of the heat sink at least partially overlaps with the projection of the first air inlet.

[0016] In one embodiment of this application, the extending direction of the heat sink is parallel to the air intake direction at the first air inlet, and a gap is formed between adjacent heat sinks to allow airflow.

[0017] In one embodiment of this application, the housing is provided with a fixing groove on the side of the first air inlet, and the controller is fixed in the fixing groove.

[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0019] The garden tool provided in this application is equipped with two air inlets to form two air paths, and the controller and motor are located on both sides of the fan, so that the controller and motor are located on the two air paths respectively, so that the controller and motor can dissipate heat independently, and the heat dissipation efficiency is greatly improved. Attached Figure Description

[0020] Figure 1 This is a front structural diagram of the garden tool in the embodiments of this application.

[0021] Figure 2 yes Figure 1 A schematic diagram of the back structure of a Chinese garden tool.

[0022] Figure 3 yes Figure 1 A cross-sectional view of the housing of a garden tool plant, cut laterally along the axial direction of the motor.

[0023] Figure 4 yes Figure 1 Schematic diagram of the internal structure of the volute.

[0024] Figure 5 yes Figure 1 A schematic diagram showing the controller and heat sink of a garden tool detaching from the mounting slot.

[0025] 10. Controller; 101. Heat sink; 20. Motor; 201. Output shaft;

[0026] 1. Housing; 11. Volute; 111. First air inlet; 112. Air outlet; 113. Fixing slot; 114. Air inlet channel; 115. Air outlet channel; 12. Housing; 121. Second air inlet; 2. Cooling fan. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] The terms used in this document, such as “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” indicating spatial relative positions, are used for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative positions” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0029] For example, if the device in the figure is flipped, a unit described as being "below" or "under" other units or features will be "above" other units or features. Therefore, the exemplary term "below" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise) and the spatially related descriptive terms used herein will be interpreted accordingly.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] Furthermore, it should be understood that although the terms "first," "second," etc., may be used herein to describe various elements or structures, the objects being described should not be limited by these terms. These terms are only used to distinguish these objects from one another. For example, a first air inlet may be referred to as a second air inlet, and similarly, a second air inlet may be referred to as a first air inlet, without departing from the scope of protection of this application.

[0032] This application provides a garden tool, such as... Figure 1 , 2 As shown, the device includes a controller 10, a motor 20, and a heat dissipation assembly for cooling the motor 20 and the controller 10. The heat dissipation assembly includes a housing 1 and a cooling fan 2 housed in the housing 1. The housing 1 is provided with a first air inlet 111, a second air inlet 121, and an air outlet 112. When the cooling fan 2 is working, it forms a controller cooling air duct from the first air inlet 111 to the air outlet 112 and a motor cooling air duct from the second air inlet 121 to the air outlet 112. The controller 10 is at least partially located within the controller cooling air duct, and the motor 20 is at least partially located within the motor cooling air duct.

[0033] The garden tool provided in this application forms two heat dissipation air ducts under the action of the cooling fan 2: a controller heat dissipation air duct from the first air inlet 111 to the air outlet 112 and a motor heat dissipation air duct from the second air inlet 121 to the air outlet 112.

[0034] like Figure 3 As shown, the controller cooling duct includes not only the airflow space within the housing 1 from the first air inlet 111 to the air outlet 112, but also the area outside the housing 1 near the first air inlet 111 and the air outlet 112 that affects airflow; similarly, the motor cooling duct also includes not only the airflow space within the housing 1 from the second air inlet 121 to the air outlet 112, but also the area outside the housing 1 near the second air inlet 121 and the air outlet 112 that affects airflow.

[0035] The controller cooling duct and the motor cooling duct respectively dissipate heat for the controller 10 and the motor 20, so that the heat dissipation between the controller 10 and the motor 20 does not interfere with each other and is not affected by the heat generated by the other during operation. This provides a good heat dissipation effect for both the controller 10 and the motor 20.

[0036] Furthermore, the first air inlet 111 and the second air inlet 121 are located on opposite sides of the housing 1, and the air outlet 112 is located between the first air inlet 111 and the second air inlet 121. The airflow in the controller cooling duct and the motor cooling duct converges inside the housing 1 and is discharged through the air outlet 112.

[0037] The air entering the housing 1 from outside the housing 1 first cools the controller 10 and the motor 20, and then merges inside the housing 1 before being discharged through the air outlet 112, ensuring that the air cooling the controller 10 and the motor 20 comes from outside the housing 1, rather than hot air that has already been cooled by the motor 20 or the controller 10.

[0038] By placing the first air inlet 111 and the second air inlet 121 on opposite sides of the housing 1, cold air from outside the housing 1 can be drawn in from both sides of the housing 1 and then blown out from the air outlet 112, which is adjacent to both the first air inlet 111 and the second air inlet 121. This also forms two non-interfering air paths outside the housing 1.

[0039] In some embodiments of this application, such as Figure 3 , 4 In this design, the housing 1 is configured as a volute 11. The output shaft 201 of the motor 20 extends at least partially into the volute 11 and is connected to the cooling fan 2 to drive the cooling fan 2. By configuring the housing 1 as a volute 11 and placing the cooling fan 2 inside the volute 11, efficient airflow is facilitated, generating a powerful airflow that carries away heat and effectively reduces the temperature. Since the motor 20 drives the cooling fan 2, no additional driving force is required for the cooling fan 2.

[0040] Furthermore, the volute 11 includes an air inlet channel 114 and an air outlet channel 115. The airflow inside the volute 11 flows in a near-circular direction within the air inlet channel 114, and the airflow inside the air outlet channel 115 is tangent to the airflow inside the air inlet channel 114. The air outlet 112 is located at the outlet of the air outlet channel 115.

[0041] The first air inlet 111 and the second air inlet 121 are located on both sides of the air intake channel 114. After the outside air enters the air intake channel 114 through the first air inlet 111 and the second air inlet 121, it is driven by the cooling fan 2 and then... Figure 4In the volute 11, air flows along the shape of the air inlet channel 114. Because the air flows in a near-circular shape within the air inlet channel 114, after being freed from the constraint of the air inlet channel 114, it continues to flow in the direction of free flow (i.e., the tangential direction), entering the air outlet channel 115, and exiting the casing 1 from the outlet of the air outlet channel 115, i.e., the air outlet 112. The near-circular shape is as follows... Figure 4 In the middle, similar to a circle, its outer circumference surrounds a center, but the tangent at any point is different from that of a circle, such as... Figure 4 The tangent at any point on the outer perimeter of a circle is not necessarily perpendicular to the line connecting that point and the center.

[0042] In some embodiments of this application, the housing 1 further includes a receiving portion 12 communicating with the volute 11. The receiving portion 12 is used to receive the motor 20. The air intake direction of the first air inlet 111 is in the same direction as the axis of the motor 20 and the cooling fan 2, and the first air inlet 111 is located on the side of the volute 11 away from the receiving portion 12.

[0043] Specifically, such as Figure 1 In the housing 1, the first air inlet 111 is located on the side of the volute 11 away from the receiving part 12 and extends outward to form a cylindrical structure. The air intake direction of the first air inlet 111 is in the same direction as the axis of the motor 20 and the cooling fan 2, which can shorten the air intake path length of the controller cooling air duct and allow outside air to quickly enter the housing 1. The size of the first air inlet 111 matches the size of the end of the motor 20 near the first air inlet 111, ensuring a large air intake volume at the first air inlet 111 while adapting to the structure of the volute 11.

[0044] Furthermore, the receiving section 12 is cylindrically connected to one side of the volute 11, and at least two second air inlets 121 are provided, with the at least two second air inlets 121 spaced apart on the side wall of the receiving section 12. Specifically, as follows... Figure 2 In the middle, the housing 12 is in the shape of a square column, that is, the housing 12 has four side walls, and a second air inlet 121 is opened on each side wall, so that the motor cooling air duct can draw in air from four directions and obtain more outside air to dissipate heat from the motor 20.

[0045] Of course, the housing 12 can also be a cylindrical or polygonal column such as a triangular prism or pentagonal prism, and the number of second air inlets 121 is not limited to... Figure 2 The four shown.

[0046] In some embodiments of this application, such as Figure 1 , 5In this design, the controller 10 is located outside the first air inlet 111, and several heat sinks 101 are provided on the side of the controller 10 closest to the first air inlet 111. Positioning the controller 10 outside the first air inlet 111, i.e., outside the housing 1, not only allows for a greater distance from the motor 20, avoiding them being within the heat-affected zone, but also enables the controller 10 to dissipate heat directly through contact with the outside air, thus enhancing its heat dissipation efficiency. The heat sinks 101 further improve the heat dissipation effect of the controller 10.

[0047] Furthermore, in the air intake direction of the first air inlet 111, the projection of the heat sink 101 at least partially overlaps with the projection of the first air inlet 111, so that when the cooling fan 2 is working, when it draws air from outside the first air inlet 111 into the housing 1, the air will flow through the heat sink 101 and carry away the heat from the controller 10 on the heat sink 101, thereby achieving heat dissipation for the controller 10.

[0048] Furthermore, the extension direction of the heat sink 101 is parallel to the air intake direction at the first air inlet 111, and a gap is formed between adjacent heat sinks 101 to allow airflow. The parallelism between the heat sink 101 and the air intake direction of the first air inlet 111 can minimize the resistance of the heat sink 101 to the airflow, thereby ensuring the smooth flow of air in the controller's cooling duct.

[0049] In some embodiments of this application, the fixing of controller 10 is as follows: Figure 5 In the housing 1, a fixing groove 113 is provided on the side of the first air inlet 111, and the controller 10 is fixed in the fixing groove 113. A notch is formed on the side of the fixing groove 113 near the first air inlet 111, so that the heat sink 101 can extend from the controller 10 toward the first air inlet 111.

[0050] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0051] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A garden tool comprising a controller, a motor, and a heat dissipation assembly for dissipating heat from the motor and the controller, characterized in that, The heat dissipation assembly comprises: a housing provided with a first air inlet, a second air inlet and an air outlet; a heat dissipation fan accommodated in the housing and forming a controller heat dissipation air channel from the first air inlet to the air outlet and a motor heat dissipation air channel from the second air inlet to the air outlet when working; wherein the controller is at least partially located in the controller heat dissipation air channel, and the motor is at least partially located in the motor heat dissipation air channel.

2. The garden tool of claim 1, wherein, The first air inlet and the second air inlet are respectively located on opposite sides of the housing, and the air outlet is located between the first air inlet and the second air inlet, and the air flows in the controller heat dissipation air channel and the motor heat dissipation air channel converge inside the housing and are discharged through the air outlet.

3. The garden tool of claim 1, wherein, The housing is configured as a volute, and an output shaft of the motor at least partially extends into the volute to connect with the heat dissipation fan to drive the heat dissipation fan to work.

4. A garden tool according to claim 3, characterised in that The volute comprises an air inlet channel and an air outlet channel, the air flow in the volute is circular in the air inlet channel and is tangent to the air flow in the air inlet channel in the air outlet channel, and the air outlet is arranged at an outlet of the air outlet channel.

5. The garden tool of claim 3, wherein, The housing further comprises a receiving portion in communication with the volute, the receiving portion is used to accommodate the motor, the air inlet direction of the first air inlet is the same as the axial direction of the motor and the heat dissipation fan, and the first air inlet is arranged on a side of the volute away from the receiving portion.

6. The garden tool of claim 5, wherein, The receiving portion is cylindrical and connected to a side of the volute, and the second air inlet is provided with at least two second air inlets, and the at least two second air inlets are arranged on the side wall of the receiving portion.

7. The garden tool of claim 1, wherein, The controller is arranged outside the first air inlet, and a side of the controller close to the first air inlet is provided with a plurality of heat dissipation fins.

8. The garden tool of claim 7, wherein, In the air inlet direction of the first air inlet, the projection of the heat dissipation fin at least partially overlaps the projection of the first air inlet.

9. The garden tool of claim 8, wherein, The extension direction of the heat dissipation fin is parallel to the air inlet direction at the first air inlet, and a gap for air flow is formed between adjacent heat dissipation fins.

10. The garden tool of claim 1, wherein, The housing is provided with a fixing groove beside the first air inlet, and the controller is fixed in the fixing groove.

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