CN217833550U

CN217833550U - Electric tool convenient for heat dissipation

Info

Publication number: CN217833550U
Application number: CN202221248939.6U
Authority: CN
Inventors: 张志峰; 黄建平
Original assignee: Jiangsu Dartek Technology Co Ltd
Current assignee: Jiangsu Dartek Technology Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-11-18
Anticipated expiration: 2032-05-23

Abstract

The embodiment of the application discloses electric tool convenient to heat dissipation, including casing and fan, the casing has an installation space, be provided with on the casing with air intake and air outlet of installation space intercommunication, the fan set up in the installation space, the casing includes fuselage casing and metal head shell, fuselage casing and metal head shell enclose into installation space, form cooling air duct between the surface of metal head shell and the fitting surface of fuselage casing, cooling air duct's one end with the installation space intercommunication, the other end constitutes the air intake. The embodiment of the application forms the cooling air duct between the surface of metal head shell and the fuselage casing, makes the air current that the fan during operation in the electric tool drove flow through the cooling air duct to it flows to have gaseous surface from the metal head shell continuously, reaches the effect to the physics cooling of metal head shell, and need not to increase unnecessary accessory, has saved electric tool's manufacturing cost.

Description

Electric tool convenient for heat dissipation

Technical Field

The present disclosure relates to power tools, and more particularly, to a power tool with heat dissipation.

Background

Impact wrench among present electric tool, in order to ensure the rigidity of machine, the shell at impact position all uses the aluminium alloy shell basically, because be metal casing, impact wrench is because the striking of internal impact structure when the elasticity operation to the bolt, can produce a large amount of heats, heat whole transmission to aluminium alloy surface, the phenomenon that the operation personnel hand touched when touchhing the aluminium alloy skull has the sensation to be scalded comparatively, among the prior art, use again to install a plastic casing or rubber spare shell on aluminium alloy skull surface, wrap up the aluminium alloy inside, the operator hand can not with aluminium alloy direct contact when using the instrument, just so can directly not feel the temperature on the aluminium alloy skull. The plastic shell or the rubber shell is used, and parts need to be added, so that the manufacturing cost of the whole product is improved.

The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide an electric tool capable of improving a phenomenon that a metal head case of an electric impact wrench has an excessively high temperature.

In order to achieve the above object, the embodiment of the present application provides an electric tool convenient to heat dissipation, including casing and fan, the casing has an installation space, be provided with on the casing with air intake and air outlet of installation space intercommunication, the fan set up in the installation space, the casing includes fuselage casing and metal head shell, the fuselage casing with the metal head shell encloses into installation space, the fuselage casing has the fitting surface, the surface of metal head shell with form the cooling air duct between the fitting surface, the one end in cooling air duct with installation space intercommunication, the other end constitutes the air intake.

In one or more embodiments, the body housing protrudes to form a protruding portion, the protruding portion is located at the bottom of the metal head shell and forms the cooling air duct with the outer surface of the bottom of the metal head shell, and the matching surface is a surface of the protruding portion facing the metal head shell.

In one or more embodiments, a bottom of the metal head shell is provided with a first recess in a radial direction thereof, and the first recess and the protrusion constitute the cooling air duct.

In one or more embodiments, a second recess is formed on the protruding portion near the bottom of the metal head case, and the second recess and the bottom of the metal head case constitute the cooling air duct.

In one or more embodiments, the bottom of the metal head shell is provided with a first protrusion matched with the second recess, and the outer surface of the first protrusion and the second recess form the cooling air duct.

In one or more embodiments, the air inlet is formed by the protrusion and the outer surface of the bottom of the metal head shell.

In one or more embodiments, the air inlet is opened on the protruding portion.

In one or more embodiments, the cooling air duct has a flat cross section.

In one or more embodiments, the cooling air duct extends in a serpentine shape.

In one or more embodiments, a plurality of cooling air ducts are formed between mating surfaces of the metal head shell and the body housing.

Compared with the prior art, according to the radiating electric tool of being convenient for of this application embodiment, through forming the cooling duct between the surface at metal head shell and the fuselage casing, the air current that makes the fan during operation in the electric tool drive flows through the cooling duct to there is gaseous surface flow from metal head shell to last, reach the effect to the physics cooling of metal head shell, improve the too high phenomenon of metal head shell temperature, and need not to increase unnecessary accessory, saved electric tool's manufacturing cost.

Drawings

FIG. 1 is a schematic view of a power tool that facilitates heat dissipation according to an embodiment of the present application;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a partial cross-sectional view of a power tool that facilitates heat dissipation according to an embodiment of the present application;

FIG. 4 is a partial schematic view of a fuselage shell according to an embodiment of the present application;

FIG. 5 is a partial schematic view of a power tool that facilitates heat dissipation according to another embodiment of the present application;

FIG. 6 is a partial cross-sectional view of a power tool that facilitates heat dissipation according to yet another embodiment of the present application.

Description of the main reference numerals:

1. a housing; 11. a body shell; 111. a mating surface; 112. a boss portion; 113. a key switch; 114. a second recess; 12. a metal head shell; 121. a first recess; 2. an installation space; 21. a fan; 22. a motor; 23. an air outlet; 3. a cooling air duct; 31. and an air inlet.

Detailed Description

The following detailed description of embodiments of the present application is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present application is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations such as "comprises" or "comprising", etc., will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1 to 3, an electric tool convenient for heat dissipation according to an embodiment of the present application includes a housing 1 and a fan 21, the housing 1 has an installation space 2, an air inlet 31 and an air outlet 23 communicated with the installation space 2 are disposed on the housing 1, the fan 21 is disposed in the installation space 2, the housing 1 includes a body housing 11 and a metal head shell 12, the installation space 2 enclosed by the body housing 11 and the metal head shell 12, the body housing 11 has a fitting surface 111, a cooling air duct 3 is formed between an outer surface of the metal head shell 12 and the fitting surface 111, one end of the cooling air duct 3 is communicated with the installation space 2, and the air inlet 31 is formed at the other end of the cooling air duct 3.

A motor 22 is further arranged in the mounting space 2, the metal head shell 12 wraps the output end of the motor 22, and the motor 22 is further connected with a fan 21 in a transmission mode. When the electric tool works, the fan 21 rotates along with the electric tool, so that air enters through the air inlet 31 of the installation space 2 and flows out of the air outlet 23, and the heat dissipation effect on the electric tool is achieved.

As shown in fig. 2 and 3, since the outer surface of the metal head shell 12 of the cooling air duct 3 is formed between the fitting surface 111 of the machine body shell 11 and the outer surface of the metal head shell 12, air is driven by the fan 21 to flow through the outer surface of the metal head shell 12, so as to achieve the effect of physically cooling the metal head shell 12, and improve the phenomenon that the temperature of the metal head shell 12 is too high. Here, the mating surface 111 of the body housing 11 may be understood as a surface of the body housing 11 connected to the metal head shell 12 or a surface of the body housing 11 facing the metal head shell 12. In fig. 3, the direction of the solid arrows indicates the direction of the gas flow.

As shown in fig. 1 to 3, a protrusion 112 may be formed on the body housing 11 to protrude outward, and the protrusion 112 is located at the bottom of the metal head shell 12. In one embodiment, the protrusion 112 and the outer surface of the bottom of the metal head casing 12 may form the cooling air duct 3, and the matching surface 111 is a surface of the protrusion 112 facing the metal head casing 12. The protruding portion 112 is provided with the key switch 113 of the electric tool, and the cooling air duct 3 is arranged at the protruding portion, so that the change of the shell 1 of the existing electric tool can be reduced, the protruding portion 112 wraps part of the metal head shell 12, and the cooling air duct 3 is arranged at the protruding portion, so that the contact area between the metal head shell 12 and the cooling air duct 3 can be increased, and the heat dissipation performance of the cooling air duct 3 is improved.

As shown in fig. 5, in one embodiment, the bottom of the metal head shell 12 may be provided with a first recess 121 toward the radial direction thereof, and the first recess 121 and the protrusion 112 form the cooling air duct 3. The first recess 121 and the protruding portion 112 form the cooling air duct 3, so that the cooling air duct 3 can be formed without changing the existing machine body housing 11, thereby eliminating the need to change the mold for producing the machine body housing 11, and providing a cost saving effect. In addition, the first recess 121 of the metal head shell 12 can increase the contact area between the cooling air duct 3 and the outer surface of the metal head shell 12 by using the curved surface or the recessed surface formed by the first recess 121, so as to improve the heat dissipation performance of the cooling air duct 3.

As shown in fig. 4, in another embodiment, a second recess 114 is formed on the protruding portion 112 near the bottom of the metal head shell 12, and the second recess 114 and the bottom of the metal head shell 12 form the cooling air duct 3. The second recess 114 and the outer surface of the metal head shell 12 form the cooling air duct 3, so that the cooling air duct 3 can be formed without changing the existing metal head shell 12, and thus, the mold for producing the metal head shell 12 does not need to be changed, thereby providing a cost-saving effect.

The bottom of the metal head shell 12 may be provided with a first protrusion (not shown) matching with the second recess 114, and the outer surface of the first protrusion and the second recess 114 form the cooling air duct 3. The first protrusion may function to reduce a distance between the outer surface of the metal head shell 12 and the second recess 114, that is, to reduce a cross-sectional area of the cooling air duct 3, so as to increase a flow rate of the gas and improve heat dissipation performance of the cooling air duct 3.

In one embodiment, as shown in fig. 6, the air inlet 31 may be opened on the protruding portion 112. One or more air inlets 31 of the cooling air duct 3 may be provided, and may be arranged according to the heat dissipation requirement.

Preferably, as shown in fig. 1 and 2, the protrusion 112 and the outer surface of the bottom of the metal head shell 12 form the air inlet 31. By arranging the air inlet 31 in this way, the outer surface of the metal head shell 12 can be radiated at the air inlet 31 of the cooling air duct 3, and the radiation performance of the cooling air duct 3 can be improved.

Preferably, the cooling air duct 3 may have a flat cross section. The flat cooling air duct 3 can increase the contact area between the cooling air duct 3 and the outer surface of the metal head shell 12, and can also reduce the sectional area of the cooling air duct 3, so that the gas flow rate is increased, and the heat dissipation performance of the cooling air duct 3 can be improved.

Preferably, the cooling air duct 3 may extend in a serpentine shape. Therefore, the air can flow through the outer surface of the metal head shell 12 with a larger area in the cooling air duct 3, and the heat dissipation performance of the cooling air duct 3 can be improved.

In another embodiment, a plurality of cooling air ducts 3 are formed between the outer surface of the metal head shell 12 and the mating surface 111 of the body housing 11. The cooling air duct 3 may be disposed not only between the protruding portion 112 and the outer surface of the metal head shell 12, but also between other positions of the body housing 11 and the metal head shell 12.

In a specific embodiment, the electric tool convenient for heat dissipation of the present application may be an electric impact wrench.

In conclusion, the electric tool convenient for heat dissipation according to the embodiment of the application has the beneficial effects that: by forming the cooling air duct 3 between the outer surface of the metal head shell 12 and the body shell 11, the air flow driven by the fan 21 in the electric tool when working flows through the cooling air duct 3, so that the air continuously flows from the outer surface of the metal head shell 12, the physical cooling effect on the metal head shell 12 is achieved, the phenomenon that the temperature of the metal head shell 12 is too high is improved, redundant accessories do not need to be added, and the production cost of the electric tool is saved.

The foregoing descriptions of specific exemplary embodiments of the present application have been presented for purposes of illustration and description. It is not intended to limit the application to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the present application and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the present application and various alternatives and modifications. It is intended that the scope of the application be defined by the claims and their equivalents.

Claims

1. The utility model provides an electric tool convenient to heat dissipation, includes casing (1) and fan (21), casing (1) has an installation space (2), be provided with on casing (1) with air intake (31) and air outlet (23) of installation space (2) intercommunication, fan (21) set up in installation space (2), casing (1) includes fuselage casing (11) and metal head shell (12), fuselage casing (11) with metal head shell (12) enclose into installation space (2), its characterized in that: fuselage casing (11) have fitting surface (111), the surface of metal head shell (12) with form cooling air duct (3) between fitting surface (111), the one end of cooling air duct (3) with installation space (2) intercommunication, the other end constitutes air intake (31).

2. The electric tool facilitating heat dissipation according to claim 1, wherein the body housing (11) is formed with a protruding portion (112) in a protruding manner, the protruding portion (112) is located at the bottom of the metal head housing (12) and forms the cooling air duct (3) with an outer surface of the bottom of the metal head housing (12), and the mating surface (111) is a surface of the protruding portion (112) facing the metal head housing (12).

3. The electric tool facilitating heat dissipation according to claim 2, wherein a bottom of the metal head case (12) is provided with a first recess (121) in a radial direction thereof, and the first recess (121) and the projection (112) constitute the cooling air duct (3).

4. The electric tool facilitating heat dissipation according to claim 2, wherein a second recess (114) is formed on the boss portion (112) near the bottom of the metal head case (12), and the second recess (114) and the bottom of the metal head case (12) constitute the cooling air duct (3).

5. The power tool facilitating heat dissipation according to claim 4, wherein the bottom of the metal head shell (12) is provided with a first protrusion which is matched with the second recess (114), and the outer surface of the first protrusion and the second recess (114) form the cooling air duct (3).

6. The power tool for facilitating heat dissipation according to claim 2, wherein the protruding portion (112) and an outer surface of a bottom portion of the metal head case (12) form the air inlet (31).

7. The power tool for facilitating heat dissipation according to claim 2, wherein the air inlet (31) is opened in the protruding portion (112).

8. The electric tool facilitating heat dissipation according to any one of claims 1 to 7, wherein the cooling air duct (3) has a flat cross section.

9. The power tool facilitating heat dissipation according to any one of claims 1 to 7, wherein the cooling air duct (3) extends in a serpentine shape.

10. The electric tool facilitating heat dissipation according to any one of claims 1 to 7, wherein a plurality of cooling air ducts (3) are formed between an outer surface of the metal head case (12) and the mating surface (111) of the body housing (11).