CN214755949U

CN214755949U - Electric tool capable of quickly dissipating heat

Info

Publication number: CN214755949U
Application number: CN202120684724.8U
Authority: CN
Inventors: 方培锵
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-28
Filing date: 2021-03-28
Publication date: 2021-11-16
Anticipated expiration: 2031-03-28

Abstract

The utility model provides a can quick radiating electric tool, 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, it still includes: the integrated heat dissipation frame is arranged in the shell; the motor and the heat dissipation fan are arranged in the integrated heat dissipation frame, an airflow channel is arranged between the motor and the integrated heat dissipation frame, the heat dissipation fan drives air in the airflow channel to flow, and the heat dissipated by the motor is taken away. The utility model discloses a heat dissipation collection complete set sets up motor, heat dissipation fan on it, compact structure not only, and radiating effect, stability etc. are better moreover, and assembly, dismantlement, maintenance are simpler and easier.

Description

Electric tool capable of quickly dissipating heat

Technical Field

The utility model relates to an electric tool's heat radiation structure, in particular to can quick radiating electric tool.

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 invention patent application with chinese patent application No. 201911243480.3 discloses a hand-held electric tool with a novel heat dissipation structure, the invention 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 the 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

An object of the utility model is to provide a radiating electric tool fast to there is not high and stability of integrated level, radiating effect to solve prior art and remain the problem that improves.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a can quick radiating electric tool, 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; the motor and the heat dissipation fan are arranged in the integrated heat dissipation frame, an airflow channel is arranged between the motor and the integrated heat dissipation frame, the heat dissipation fan drives air in the airflow channel to flow, and the heat dissipated by the motor is taken away.

Preferably, the integrated heat dissipation frame is cylindrical, a through hole is formed in the integrated heat dissipation frame, and the through hole is communicated with the airflow channel.

Preferably, the through hole is close to the front end of the integrated heat dissipation frame, an end cover is arranged at the rear end of the motor, a plurality of protrusions are arranged on the circumference of the end cover, and a vent of the airflow channel is formed between the adjacent protrusions.

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 discharge through hole, and the air suction hole and the air discharge through hole are respectively located at two ends of the air flow channel and are respectively used for sucking cold air and discharging hot air.

Preferably, the inner wall of the integrated heat dissipation frame is provided with a protruding area protruding from the inner surface, and the protruding area is arranged along the length direction of the integrated heat dissipation frame.

Preferably, the outer surface of the motor is provided with a plurality of ventilation grooves for forming the air flow passage, the ventilation grooves extending along a length direction of the motor.

Preferably, a connection column is arranged at the front end of the integrated heat dissipation frame, the output shaft is arranged in the connection column through a bearing, and the output shaft penetrates through the connection column.

Preferably, the integrated heat dissipation frame is a cylindrical cage-shaped structure including hollows, and the hollows are a part of the airflow channel.

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 can know, the utility model discloses an integrated heat dissipation frame sets up motor, heat dissipation fan on it, and compact structure not only, radiating effect, stability etc. are better moreover, and assembly, dismantlement, maintenance are simpler and easier.

Drawings

Fig. 1 is a schematic structural diagram (partially cut away) of a first embodiment of the present invention;

fig. 2 is a schematic rear view of a combination of the integrated heat dissipation frame and the motor according to the first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

fig. 4-5 are schematic perspective views of different angles of a motor end cover according to an embodiment of the present invention;

fig. 6 to fig. 8 are schematic structural views of the integrated heat dissipation frame according to a first embodiment of the present invention at different angles;

fig. 9-10 are schematic right-view structural diagrams of a heat dissipation fan according to a first embodiment of the present invention;

FIG. 11 is a schematic sectional view taken along line B-B in FIG. 12 (example II);

FIG. 12 is a view taken along the line C in FIG. 11 (embodiment II);

fig. 13 is a schematic perspective view of a motor and a heat dissipation fan assembly according to a second embodiment of the present invention;

fig. 14 is a schematic perspective view of a second motor end cover according to an 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, the first embodiment of the present invention provides an electric tool capable of dissipating heat quickly, and more particularly, the first embodiment of the present invention is an electric pruning machine for pruning branches such as gardens and fruit trees. 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 at the front end of the shell 3, a battery 1 which is positioned at the rear end of the shell 3 and the like (it needs to be additionally noted that the upper and lower parts, the front and back parts, the left and right parts and the like are all described in the application 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 has an output shaft 52 penetrating therethrough, the heat dissipation fan 7 is sleeved on the output shaft 52 and located at the front side of the motor 5, and one end of the output shaft 52 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 the movable blade and the like.

For the purpose of this 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 40 is disposed between the integrated heat dissipation frame 4 and the motor 5, 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 40. 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 air flow channel 40 to flow, so as to take away the heat dissipated to the air flow channel 40 by the motor 5, the battery 1 and the like.

Preferably, as shown in fig. 3-8, the integrated heat dissipation frame 4 is cylindrical, and the integrated heat dissipation frame 4 is provided with a through hole 41 and is corresponding to and through the air flow channel 40, and the heat dissipation fan 7 drives the air in the air flow channel 40 to flow through the through hole 41. Further, the heat radiating fan 7 is located at the front side of the motor 5, and thus, the through hole 41 is close to the front end of the integrated heat radiating bracket 4 to make the air flow in the air flow passage 40 more unobstructed.

The rear end of the motor 5 is provided with an end cover 51, the circumference of the end cover 51 is provided with a plurality of protrusions 511 which are arc-shaped, the external contour of the end cover is substantially consistent with the inner wall of the integrated heat dissipation frame 4, ventilation openings 5100 of the airflow channel 40 are formed between the adjacent protrusions 511, the ventilation openings 5100 are the necessary airflow path of the airflow channel 40, or the ventilation openings 5100 are part of the airflow channel 40. The protrusion 511 abuts against the inner wall of the integrated heat dissipation frame 4, not only having a positioning function, but also not blocking the flow of gas. In addition, the end cap 51 is further provided with a through hole 510 for passing a cable such as a power line and a data line of the motor 5.

Preferably, as shown in fig. 8, the inner wall of the integrated heat dissipation frame 4 is provided with a protruding area 43 protruding from the inner surface, and the protruding area 43 is disposed along the length direction of the integrated heat dissipation frame 4. The adjacent protruding regions 43 form the recessed regions 430 therebetween, the recessed regions 430 form the main body of the airflow passage 40, and the protruding regions 43 correspond to the ventilation openings 5100, so that the airflow in the airflow passage 40 can be more unobstructed.

In other embodiments, the integrated heat dissipation frame may not be a barrel shape (or a barrel shape) whose circumference is substantially sealed, or may be a cylindrical squirrel cage structure whose periphery is hollowed out (which may be similar to a rotor of a squirrel cage motor), and the hollowing out may form a part of the airflow channel.

In order to accelerate the gas flow in the gas flow passage 40, the housing 3 is provided with a gas hole for facilitating the gas flow, and the gas flow passage 40 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 40 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 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 the connecting column 42, the front section of the output shaft 52 of the motor 5 is arranged in the connecting column 42 through the bearing 82, the rear end is arranged in the end cover 51 of the motor 5 through the bearing 81, the output shaft 52 passes through a through hole in the connecting column 42 and then is connected with a transmission mechanism and the like, and the connecting column 42 can be provided with external threads or a clamping groove and the like to realize simple assembly.

As shown in fig. 9-10, 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 52 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 52, is located at the front end face of the motor 5, and is fixedly disposed without rotating along with the output shaft 52.

As shown by the long arrows in fig. 1 and fig. 3, in the first embodiment, the external cold air enters the housing 3 from the air intake hole 31, passes through the ventilation opening 5100, and then flows along the air flow channel 40 to the front end of the motor 5, and takes away the heat dissipated by the motor 5 (possibly including the battery 1), and the heat dissipation fan 7 drives the air flow to be discharged from the through hole 41, and finally is discharged outside the housing 3 through the air discharge hole 32.

As shown in fig. 11-14, the second embodiment of the present invention shows another implementation structure of the airflow channel 50, in which the airflow channel 50 extends from the outer end surface of the end cover 51 of the motor 5 to the front of the motor 5, that is, the space where the heat dissipation fan 7 is located. Structurally, the airflow channel 50 mainly includes a ventilation groove 500 located on the outer surface of the main body of the motor 5 and a ventilation groove 5000 located on the outer surface of the end cover 51, and the ventilation groove 500 and the ventilation groove 5000 are correspondingly arranged and communicated, so that the air flow is convenient to be smooth. The air flow passage 50 extends along the length of the motor 5 as a whole.

As can be seen from the analysis, the airflow channel 50 of the second embodiment is different from the airflow channel 40 of the first embodiment in the forming positions, but the airflow channel 50 is mainly formed on the outer surface of the motor 5 and the airflow channel 40 is mainly formed on the inner surface of the integrated heat dissipation frame 4, although both are formed in the groove-like structure. Of course, in other embodiments, a groove-shaped structure may be provided on the outer surface of the motor and a groove-shaped structure may be provided on the inner surface of the integrated heat dissipation frame to form the airflow channel together. Further, any embodiment that forms a gas flow path (gas flow path) between the integrated heat sink and the motor is within the scope of the present patent.

To sum up, the utility model discloses not only can realize the installation of heat dissipation function structure with compact structure, radiating efficiency, assembly efficiency, maintenance convenience etc. can all be improved moreover.

It will be appreciated by those skilled in the art that the invention 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 the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims

1. The utility model provides a can quick radiating electric tool, 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; the motor and the heat dissipation fan are arranged in the integrated heat dissipation frame, an airflow channel is arranged between the motor and the integrated heat dissipation frame, the heat dissipation fan drives air in the airflow channel to flow, and the heat dissipated by the motor is taken away.

2. The electric tool capable of rapidly dissipating heat according to claim 1, wherein the integrated heat dissipating frame is cylindrical, and a through hole is formed in the integrated heat dissipating frame, and the through hole is communicated with the air flow channel.

3. The electric tool capable of rapidly dissipating heat according to claim 2, wherein the through hole is disposed near a front end of the integrated heat dissipating frame, an end cover is disposed at a rear end of the motor, and a plurality of protrusions are disposed on a circumference of the end cover, and a vent of the airflow channel is formed between adjacent protrusions.

4. The power tool capable of rapidly dissipating heat according to claim 1, wherein the housing is provided with an air hole for facilitating air flow, and the air flow passage is communicated with the air hole.

5. The electric tool capable of rapidly dissipating heat 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 respectively located at two ends of the air flow channel and are respectively used for sucking cold air and discharging hot air.

6. The electric tool capable of rapidly dissipating heat as claimed in claim 2, wherein the inner wall of the integrated heat dissipating frame is provided with a protruding region protruding from the inner surface, and the protruding region is disposed along a length direction of the integrated heat dissipating frame.

7. The power tool capable of rapidly dissipating heat according to claim 2, wherein an outer surface of the motor is provided with a plurality of ventilation grooves for forming the air flow passage, the ventilation grooves extending along a length direction of the motor.

8. The power tool capable of rapidly dissipating heat according to claim 2, wherein a connection column is provided at a front end of the integrated heat dissipating frame, the output shaft is provided in the connection column through a bearing, and the output shaft passes through the connection column.

9. The power tool capable of dissipating heat quickly as claimed in claim 1, wherein the integrated heat dissipating frame is a cylindrical cage-like structure including hollows, the hollows being a part of the airflow channel.

10. The electric tool capable of rapidly dissipating heat according to any one of claims 1 to 9, wherein the heat dissipating fan includes a sleeve, a hollow base plate, and a fan blade, the sleeve is sleeved on the output shaft, the sleeve is located at the center of the base plate, and the fan blade is disposed on one side of the base plate.