CN215935630U

CN215935630U - Electric tool with active heat dissipation effect

Info

Publication number: CN215935630U
Application number: CN202120684961.4U
Authority: CN
Inventors: 方培锵
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-28
Filing date: 2021-03-28
Publication date: 2022-03-04
Anticipated expiration: 2031-03-28

Abstract

The utility model provides an electric tool with initiative radiating effect, includes the casing and is located motor, the heat dissipation fan in the casing, the motor has the output shaft, the heat dissipation fan cover is located on the output shaft, wherein, still include: the integrated heat dissipation frame is arranged in the shell, and an airflow channel is arranged between the integrated heat dissipation frame and the inner wall of the shell; the motor and the heat dissipation fan are arranged in the integrated heat dissipation frame, the heat dissipation fan drives the air in the airflow channel to flow, and the heat dissipated to the airflow channel by the motor is taken away. The utility model adopts a heat dissipation set, and arranges the motor and the heat dissipation fan on the heat dissipation set, thereby having compact structure, better heat dissipation effect, stability and the like, and simpler assembly, disassembly and maintenance.

Description

Electric tool with active heat dissipation effect

Technical Field

The present invention relates to a heat dissipation structure of an electric tool, and more particularly, to an electric tool with an active heat dissipation effect.

Background

Electric tools including electric pruning machines generate a large amount of heat in the operation process, the heat accumulation can cause overheating of the machines, the use experience of users can be influenced, and the service life of the machines can be reduced.

In view of this, many electric tools all adopt a heat dissipation mechanism, for example, the utility model patent application with chinese patent application No. 201911243480.3 discloses a hand-held electric tool with a novel heat dissipation structure, the utility model patent application with chinese patent No. 201810979461.6 discloses a heat dissipation fan blade, a fan and an electric tool of an electric tool, the utility model patent with chinese patent No. 201620815191.1 discloses an electric tool which is beneficial to heat dissipation, according to analysis, the motor or battery pack, the heat dissipation fan and the like of the current electric tool are basically arranged in a split manner, and such a structure has the following defects:

1, overall stability and reliability are poor.

2, the integration level is not high, and the heat dissipation effect needs to be improved.

And 3, the assembly and the maintenance are inconvenient.

Disclosure of Invention

The utility model aims to provide an electric tool with an active heat dissipation effect, and aims to solve the problems that the integration level is not high, the stability is low, and the heat dissipation effect needs to be improved in the prior art.

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

the utility model provides an electric tool with initiative radiating effect, includes the casing and is located motor, the heat dissipation fan in the casing, the motor has the output shaft, the heat dissipation fan cover is located on the output shaft, wherein, still include: the integrated heat dissipation frame is arranged in the shell, and an airflow channel is arranged between the integrated heat dissipation frame and the inner wall of the shell; the motor and the heat dissipation fan are arranged in the integrated heat dissipation frame, the heat dissipation fan drives the air in the airflow channel to flow, and the heat dissipated to the airflow channel by the motor is taken away.

Preferably, the integrated heat dissipation frame is cylindrical, and a through hole is formed in the integrated heat dissipation frame and corresponds to the heat dissipation fan.

Preferably, the through holes comprise an air suction through hole and an air exhaust through hole which are arranged along the length direction of the integrated heat dissipation frame; the air suction through hole is close to the air suction side of the heat dissipation fan, and the exhaust through hole is close to the exhaust side of the heat dissipation fan.

Preferably, the shell is provided with an air hole for facilitating air flow, and the air flow channel is communicated with the air hole.

Preferably, the air holes include an air suction hole and an air exhaust through hole, and the air suction hole and the air exhaust through hole are arranged at two ends of the airflow channel and are respectively used for sucking cold air and exhausting hot air.

Preferably, the outer wall of the integrated heat dissipation frame is provided with heat dissipation ribs protruding out of the surface, and the heat dissipation ribs are arranged along the length direction of the integrated heat dissipation frame.

Preferably, the heat sink further comprises a guide member between the outer wall of the integrated heat sink and the inner wall of the housing, and between the suction through hole and the discharge through hole, for blocking a direct flow of the gas in the gas flow passage so as to make the gas flow in the gas flow passage necessarily pass through the suction through hole and the discharge through hole.

Preferably, the guiding member is a ring-shaped member formed on the inner wall of the housing and abutting against the outer wall of the integrated heat dissipation frame.

Preferably, a connecting column is arranged at the front end of the integrated heat dissipation frame, the output shaft is arranged in the connecting column through a bearing, the output shaft penetrates through the connecting column, and an external thread is further arranged on the connecting column.

Preferably, the heat dissipation fan includes a sleeve, a hollowed-out substrate and fan blades, the sleeve is sleeved on the output shaft, the sleeve is located at the center of the substrate, and the fan blades are arranged on one side of the substrate.

The analysis shows that the utility model adopts a heat dissipation set, and arranges the motor and the heat dissipation fan on the heat dissipation set, thereby not only having compact structure, but also having better heat dissipation effect, stability and the like, and being simpler and easier to assemble, disassemble and maintain.

Drawings

Fig. 1 is a schematic structural diagram (partially in cross section) of a first embodiment of the present invention;

fig. 2-3 are schematic perspective views of different angles of a combination of components such as an integrated heat dissipation frame and a motor according to an embodiment of the utility model;

fig. 4 is a schematic right-view structural diagram of a combination of components such as an integrated heat dissipation frame and a motor according to a first embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 4;

fig. 6-7 are schematic perspective views of heat dissipation fans according to different angles in a first embodiment of the present invention;

FIG. 8 is a schematic structural view (partially in section) of a second embodiment of the present invention;

fig. 9 is a schematic right-view structural diagram of a combination of components such as an integrated heat dissipation frame and a motor according to a third embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 7, an embodiment of the present invention provides an electric tool with an active heat dissipation effect, and more specifically, an electric pruning machine for pruning branches of gardens, fruit trees, and the like. The electric pruning machine comprises a shell 3, a motor 5 and a heat dissipation fan 7 which are positioned in the shell 3, a blade assembly 2 which is positioned on the front side of the shell 3, a battery 1 which is positioned on the rear side of the shell 3 and the like (it needs to be additionally noted that the terms of "up and down, front and back, left and right" and the like in the application are used for convenience of description, and relative to the drawings or using habits of the specification, the blade assembly 2 comprises a movable blade, a fixed blade and the like. The motor 5 is provided with an output shaft 51 penetrating through the motor, the heat dissipation fan 7 is sleeved on the output shaft 51 and is positioned on the front side of the motor 5, and one end of the output shaft 51 penetrates through the heat dissipation fan 7 and then is connected with a transmission mechanism and the like so as to drive components such as a movable blade and the like.

In order to achieve the purpose of the present application, the first embodiment further includes an integrated heat dissipation frame 4, the integrated heat dissipation frame 4 is disposed in the housing 3, and an airflow channel 30 is disposed between the integrated heat dissipation frame 4 and the inner wall of the housing 3, and a portion of the heat emitted by the motor 5, even the heat emitted by the battery 1, is emitted into the airflow channel 30. The motor 5 and the heat dissipation fan 7 are both arranged in the integrated heat dissipation frame 4, and the heat dissipation fan 7 drives the air in the airflow channel 30 to flow, so as to take away the heat dissipated to the airflow channel 30 by the motor 5, the battery 1 and the like.

Preferably, as shown in fig. 2 to 5, the integrated heat dissipation frame 4 is cylindrical, and the integrated heat dissipation frame 4 is provided with a through hole corresponding to the heat dissipation fan 7 and communicating with the airflow channel 30, and the heat dissipation fan 7 drives the air in the airflow channel 30 to flow through the through hole. Further, the through holes include a suction through hole 41 and a discharge through hole 42 arranged along the length direction of the integrated heat dissipation frame 4; the air suction through hole 41 is close to the air suction side of the heat radiation fan 7, and the air discharge through hole 42 is close to the air discharge side of the heat radiation fan 7. Since the heat radiation fan 7 is positioned at the front side of the motor 5, the air suction through hole 41 and the air discharge through hole 42 are close to the front end of the integrated heat radiation frame 4. In other embodiments, if the blade shape of the heat dissipation fan 7 is changed so that the suction and discharge directions of the heat dissipation fan 7 are changed, the positions of the suction through hole 41 and the discharge through hole 42 need to be interchanged.

In order to accelerate the gas flow in the gas flow channel 30, the housing 3 is provided with a gas hole for facilitating the gas flow, and the gas flow channel 30 is communicated with the gas hole. Further, the air holes include an air suction hole 31 and an air discharge hole 32, and the air suction hole 31 and the air discharge hole 32 are disposed at two ends of the air flow channel 30 and respectively used for sucking cold air and discharging hot air. In the first embodiment, the motor 5 is located at the position of the handle held by the user, so that the air suction holes 31 and the air exhaust holes 32 are located at the positions outside the two ends of the handle, and the air flow of the air suction holes 31 and the air exhaust holes 32 is prevented from being influenced by the palm of the user. Of course, the air intake hole 31 may be provided around the battery 1 in order to take more heat generated by the battery 1. In order to allow the generated hot air to blow off wood chips, impurities, etc., the exhaust through holes 32 may be provided at the periphery of the blade assembly 2.

In order to make the air flow in the air flow channel 30 substantially flow through the heat dissipation fan 7, the present embodiment further includes a guide 33, the guide 33 is located between the outer wall of the integrated heat dissipation frame 4 and the inner wall of the housing 3, and between the suction through hole 41 and the discharge through hole 42, for blocking the direct flow of the gas in the air flow channel 30 so that the gas in the air flow channel 30 necessarily passes through the suction through hole 41 and the discharge through hole 42. In order to realize the function of the guiding element 33 with a simple structure and process, the guiding element 33 of the first embodiment is a ring-shaped element formed on the inner wall of the housing 3 and abutting against the outer wall of the integrated heat dissipation frame 4. The guide member 33 at this time has not only a function of guiding the direction of the airflow but also a function of positioning the integrated heat dissipation frame 4.

In order to make the structure of the integrated heat dissipation frame 4 more compact and easier to assemble with other structures, the front end of the integrated heat dissipation frame 4 of the first embodiment is provided with a connection column 44, the front section of the output shaft 51 of the motor 5 is arranged in the connection column 44 through a bearing 82, the rear end is arranged in the end cover 83 of the motor 5 through a bearing 81, the output shaft 51 is connected with a transmission mechanism and the like after passing through a through hole 440 in the connection column 44, and the connection column 44 is further provided with an external thread 43 to realize simple assembly.

As shown in fig. 6-7, the heat dissipation fan 7 includes a sleeve 72, a base plate 71 having a hollow 710, and a fan 73, wherein the sleeve 72 is sleeved on the output shaft 51 to rotate, the sleeve 72 is located at the center of the base plate 71, and the fan 73 is disposed on a side surface of the base plate 71.

In order to prevent dust from entering the motor 5, the first embodiment further includes a dust-proof sheet 6, the dust-proof sheet 6 is in an annular sheet structure, is sleeved on the output shaft 51, is located at the front end face of the motor 5, and is fixedly disposed without rotating along with the output shaft 51.

As shown by the longer arrows in fig. 1 and 5, the airflow path of the first embodiment is that the external cold air enters the casing 3 from the air intake hole 31, then flows along the airflow channel 30 to the front end of the motor 5, and takes away the heat emitted by the motor 5 (and possibly the battery 1) (the heat emitted by the motor 5 is conducted into the airflow channel 30 by the integrated heat dissipation frame 4), the airflow flows forward and meets the blockage of the guide member 33, and substantially all of the airflow enters the air intake through hole 41, and the heat dissipation fan 7 drives the airflow to be discharged from the air discharge through hole 42, and finally the airflow is discharged out of the casing 3 through the air discharge hole 32.

As shown in fig. 8, the second embodiment of the present invention is mainly different from the first embodiment in that the heat dissipation fan 7 is disposed at the rear of the motor 5, the output shaft 51 is extended backward to facilitate the installation of the heat dissipation fan 7, and the dust-proof sheet 6 is disposed at the rear end face of the motor 5.

As shown in fig. 9, a third embodiment of the present invention is mainly characterized in that the outer wall of the integrated heat dissipation frame 4 is provided with heat dissipation ribs 45 protruding from the surface, and the heat dissipation ribs 45 extend along the length direction of the integrated heat dissipation frame 4. The function of the heat dissipating ribs 45 is not only to increase the heat dissipating efficiency, but also to play a positioning role if necessary.

In summary, the present invention can be mounted with a compact structure using a heat dissipation function structure, and can improve heat dissipation efficiency, assembly efficiency, maintenance convenience, and the like.

It will be appreciated by those skilled in the art that the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the utility model are intended to be embraced therein.

Claims

1. The utility model provides an electric tool with initiative radiating effect, includes the casing and is located motor, the heat dissipation fan in the casing, the motor has the output shaft, the heat dissipation fan cover is located on the output shaft, its characterized in that still includes:

the integrated heat dissipation frame is arranged in the shell, and an airflow channel is arranged between the integrated heat dissipation frame and the inner wall of the shell;

the motor and the heat dissipation fan are arranged in the integrated heat dissipation frame, the heat dissipation fan drives the air in the airflow channel to flow, and the heat dissipated to the airflow channel by the motor is taken away.

2. The power tool with active heat dissipation effect as claimed in claim 1, wherein the integrated heat dissipation frame is cylindrical, and a through hole is formed on the integrated heat dissipation frame, and the through hole corresponds to the heat dissipation fan.

3. The power tool with active heat dissipation effect according to claim 2, wherein the through holes comprise a suction through hole and an exhaust through hole arranged along the length direction of the integrated heat dissipation frame; the air suction through hole is close to the air suction side of the heat dissipation fan, and the exhaust through hole is close to the exhaust side of the heat dissipation fan.

4. The power tool with active heat dissipation effect as claimed in claim 1, wherein the housing is provided with an air hole for facilitating air flow, and the air flow channel is communicated with the air hole.

5. The power tool with active heat dissipation effect according to claim 4, wherein the air holes comprise an air suction hole and an air discharge hole, and the air suction hole and the air discharge hole are disposed at two ends of the air flow channel and are respectively used for sucking cold air and discharging hot air.

6. The power tool with active heat dissipation effect as claimed in claim 2, wherein the outer wall of the integrated heat dissipation frame is provided with heat dissipation ribs protruding from the surface, and the heat dissipation ribs are disposed along the length direction of the integrated heat dissipation frame.

7. The power tool with active heat dissipation effect according to claim 3, further comprising a guide member between the outer wall of the integrated heat dissipation bracket and the inner wall of the housing, and between the suction through hole and the exhaust through hole, for blocking a direct flow of the gas in the gas flow passage so as to inevitably pass through the suction through hole and the exhaust through hole.

8. The power tool with active heat dissipation effect according to claim 7, wherein the guiding member is a ring-shaped member formed on the inner wall of the housing and abutting against the outer wall of the integrated heat dissipation frame.

9. The power tool with active heat dissipation effect according to claim 2, wherein a connection column is disposed at a front end of the integrated heat dissipation frame, the output shaft is disposed in the connection column through a bearing, the output shaft passes through the connection column, and an external thread is further disposed on the connection column.

10. The power tool with active heat dissipation effect according to any one of claims 1 to 9, wherein the heat dissipation fan includes a sleeve, a hollow substrate, and a fan blade, the sleeve is sleeved on the output shaft, the sleeve is located at the center of the substrate, and the fan blade is located at one side of the substrate.