Case and electric tool

Abstract

The utility model discloses a machine shell and an electric tool, and relates to the technical field of electric tools. The machine shell comprises a machine shell body and a decorative cover fixedly connected with the machine shell body, the machine shell body is used for containing a motor of the electric tool and a fan connected with the motor, a first air opening corresponding to the fan is formed in the machine shell body, and the decorative cover is provided with a connecting part connected with the first air opening. The connecting part is provided with a second air opening communicated with the first air opening, and the connecting face of the connecting part and the first air opening is spaced from the second air opening in the direction from the second air opening to the first air opening. The casing and the electric tool can solve the problems that the size of an air port is small and the heat dissipation of a motor is poor due to the fact that the design of the air port needs to avoid a decorative plate and multiple injection molding positions in the prior art.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and more specifically, to a housing and a power tool. Background Technology

[0002] Power tools have a motor inside their housing. Since the motor generates a lot of heat when it is working, a fan is usually installed inside the housing, and an air inlet and an air outlet are provided on the housing. The fan draws air from the outside environment into the housing through the air inlet and out through the air outlet to dissipate heat from the inside of the housing and prevent heat from accumulating inside the housing.

[0003] In the prior art, when the housing involves multiple injection molding or has decorative panels, the air vents need to be positioned away from the decorative panels and multiple injection molding areas to ensure the product's aesthetics. This results in smaller air vent sizes, poorer heat dissipation for the motor, and compromises the safety of using the power tools. Utility Model Content

[0004] The purpose of this application is to provide a housing and power tool that can solve the problems of small air vent size and poor motor heat dissipation caused by the need for air vent design to avoid the decorative panel and multiple injection molding positions in the prior art.

[0005] The embodiments of this application are implemented as follows:

[0006] A first aspect of this application provides a housing, including a housing body and a decorative cover fixedly connected to the housing body. The housing body is used to house a motor of a power tool and a fan connected to the motor. The housing body has a first air vent corresponding to the fan. The decorative cover has a connecting portion connected to the first air vent. A second air vent communicating with the first air vent is provided on the connecting portion. Along the direction from the second air vent towards the first air vent, the connecting surface of the connecting portion to the first air vent is spaced apart from the second air vent. This housing can solve the problems in the prior art where the air vent design needs to avoid the decorative panel and the location of multiple injection molding, resulting in a small air vent size and poor motor heat dissipation.

[0007] In one possible implementation, the connecting part is a protrusion provided on the side of the decorative cover near the housing body, and the outer peripheral surface of the protrusion is in contact with the inner peripheral surface of the first air vent.

[0008] In one possible implementation, the housing body and the decorative cover are a secondary injection molding structure. The outer peripheral surface of the protrusion and the inner peripheral surface of the first air vent are fitted together to form the sealing surface of the secondary injection molding structure. The sealing surface is away from the second air vent.

[0009] As an implementation, the thickness of the protruding part is equal to the thickness of the casing body at the outer edge of the first air vent.

[0010] As an implementation, the second air vent comprises a plurality of strip-shaped heat dissipation holes arranged in parallel and at intervals.

[0011] As an implementation, the casing body comprises a first casing and a second casing arranged oppositely, and the decorative cover comprises a first cover and a second cover arranged oppositely, wherein the first casing and the first cover are located on the same side of the casing, and the second casing and the second cover are located on the other side of the casing.

[0012] As an implementation, the first air vent and the second air vent are arranged on the casing and the cover on one side, and an identification element is arranged on the cover on the other side.

[0013] As an implementation, the number of the first air vent and the second air vent is two, and the two first air vents are arranged on the first casing and the second casing respectively, and the two second air vents are arranged on the first cover and the second cover respectively.

[0014] The second aspect of the embodiment of the present application provides an electric tool, comprising a motor, a fan and an output head connected with the motor, and the casing described above, the motor and the fan are accommodated in the casing, and the output head is installed at the end of the casing and connected with the motor. The casing can solve the problem of small air vent size and poor motor heat dissipation caused by the need to avoid the position of the decorative plate and multiple injection molding in the prior art.

[0015] As an implementation, the starting switch and the gear knob are movably connected to the outer wall of the casing.

[0016] The beneficial effects of the embodiment of the present application include:

[0017] The shell comprises a shell body and a decorative cover fixedly connected with the shell body, the shell body is used for accommodating a motor of the electric tool and a fan connected with the motor, the shell body is provided with a first air port corresponding to the fan, the decorative cover has a connecting portion connected with the first air port, the connecting portion is provided with a second air port in communication with the first air port, and the connecting surface of the connecting portion and the first air port is spaced from the second air port in the direction from the second air port to the first air port. According to the shell, the second air port is arranged on the decorative cover and in communication with the first air port, so that air in the external environment can flow relative to the shell body through the first air port and the second air port when the fan works, thereby avoiding that the decorative cover shields the first air port and affects the function of the first air port, and further ensuring the heat dissipation effect of the motor. The second air port is arranged on the connecting portion, the connecting portion is connected with the first air port, that is, the second air port and the first air port are not overlapped to form a sleeve hole (or a stepped sleeve hole), so that the situation that the glue sealing surface and / or the dislocation reduce the ventilation area is avoided, and the situation that the second air port and the first air port are overlapped to form a sleeve hole (or a stepped sleeve hole) of different colors and affect the appearance is also avoided. Meanwhile, when a user observes from the second air port to the inside of the shell body (that is, in the direction from the second air port to the first air port), since the connecting surface of the connecting portion and the first air port is spaced from the second air port, the user can only see the inner circumferential surface of the second air port, and cannot see the connecting surface of the connecting portion and the first air port, so that the sleeve hole (or the stepped sleeve hole) of different colors is avoided when the color of the decorative cover is different from that of the shell body, thereby improving the overall appearance of the shell. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] Figure 1 One of the structural schematic diagrams of the shell provided by the embodiments of the present application;

[0020] Figure 2 One of the explosion schematic diagrams of the shell provided by the embodiments of the present application;

[0021] Figure 3 The sectional view of the shell provided by the embodiments of the present application;

[0022] Figure 4 The partial enlarged view of Figure 3

[0023] Figure 5 The structural schematic diagram of the decorative cover provided by the embodiments of the present application; ​

[0024] Figure 6 Figure 2 is a schematic view of an explosion of a casing according to an embodiment of the present application;

[0025] Figure 7 Figure 3 is a schematic view of a structure of a casing according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0028] It should be noted that: similar reference numerals and letters indicate similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Please refer to Figures 1 to 4 The embodiment of the present application provides a casing 10, which comprises a casing body 11 and a decorative cover 12 fixedly connected with the casing body 11, the casing body 11 is used for accommodating a motor of a power tool 100 and a fan connected with the motor, the casing body 11 is provided with a first air port 111 corresponding to the fan, the decorative cover 12 has a connecting portion 121 connected with the first air port 111, the connecting portion 121 is provided with a second air port 122 in communication with the first air port 111, and the connecting surface of the connecting portion 121 and the first air port 111 is spaced from the second air port 122 in the direction of the second air port 122 towards the first air port 111. The casing 10 can solve the problem of small air port size and poor motor heat dissipation caused by the need to avoid the position of the decorative plate and multiple injection molding in the prior art.

[0033] Specifically, as shown in Figure 1 and Figure 2 The casing 10 comprises the casing body 11, which can accommodate the motor of the power tool 100 and the fan electrically connected with the motor inside the casing body 11, so as to play a role of accommodating and protecting the parts including the motor and the fan through the casing body 11. The first air port 111 is arranged on the casing body 11, and the specific position of the first air port 111 on the casing body 11 corresponds to the specific position of the fan in the casing body 11, so that air can flow in and out of the casing body 11 through the first air port 111 when the fan is working, and the heat in the casing body 11 is dissipated with the flow of air, thereby avoiding the heat generated by the motor and other parts when working from accumulating in the casing body 11.

[0034] Please continue to refer to Figure 1 and Figure 2 The casing 10 further comprises the decorative cover 12, which is fixedly connected with the casing body 11, and the decorative cover 12 is fixed to the outer surface of the casing body 11, so as to play a decorative role of the casing body 11 through the decorative cover 12. In order to play a better decorative role, the decorative cover 12 and the casing body 11 can have different colors. Please refer to Figure 3 and Figure 4The side of the decorative cover 12 has a connecting portion 121 for connecting with the first air vent 111 to fix the decorative cover 12 to the casing body 11. The second air vent 122 is arranged on the connecting portion 121 and communicates with the first air vent 111, so that when the fan is working, the air in the external environment can flow relative to the casing body 11 through the first air vent 111 and the second air vent 122, thereby avoiding the decorative cover 12 from blocking the first air vent 111 and affecting the function of the first air vent 111.

[0035] As shown in Figures 2 to 4 the connecting face of the connecting portion 121 and the first air vent 111 is spaced from the second air vent 122 in the direction from the second air vent 122 to the first air vent 111. In other words, in the plane perpendicular to the direction from the second air vent 122 to the first air vent 111, the projection of the connecting face of the connecting portion 121 and the first air vent 111 is spaced from the projection of the second air vent 122.

[0036] Since the second air vent 122 is arranged on the connecting portion 121 and the connecting portion 121 is connected with the first air vent 111, that is, the second air vent 122 and the first air vent 111 are not superposed to form a sleeve hole (or a stepped sleeve hole), the situation that the glue sealing surface and / or misalignment reduces the ventilation area caused by the superposition of the second air vent 122 and the first air vent 111 can be avoided, and the situation that the appearance is affected by the different color sleeve hole (or stepped sleeve hole) formed by the superposition of the second air vent 122 and the first air vent 111 can also be avoided. At the same time, when the user observes from the second air vent 122 to the inside of the casing body 11 (that is, in the direction from the second air vent 122 to the first air vent 111), since the connecting face of the connecting portion 121 and the first air vent 111 is spaced from the second air vent 122, the user can only see the inner circumferential surface of the second air vent 122, and cannot see the connecting face of the connecting portion 121 and the first air vent 111, thereby avoiding the appearance of a different color sleeve hole (or stepped sleeve hole) when the decorative cover 12 and the casing body 11 have different colors, and improving the overall appearance of the casing 10.

[0037] Compared with the prior art, the present application does not change the existing casing layout, does not increase the number of parts and production cost, and does not affect the convenience of use and operation. By arranging the second air vent 122 on the connecting portion 121 of the decorative cover 12, the overall appearance of the casing 10 is not damaged, the different color sleeve hole at the connection of the two air vents is avoided, the overall appearance of the casing 10 is improved, the problem of small air vent size in limited space is solved, the area of the second air vent 122 is as large as possible, the heat dissipation effect of the motor is ensured through the first air vent 111 and the second air vent 122, and the reliability of the electric tool 100 is improved.

[0038] As an optional embodiment, in the present embodiment, as shown in Figures 3 to 6As shown, the connecting portion 121 is a protruding portion arranged on the side of the decorative cover 12 close to the casing body 11, and the outer circumferential surface of the protruding portion is attached to the inner circumferential surface of the first air port 111 to fix the decorative cover 12 and the casing body 11.

[0039] In other words, as shown in Figure 5 and Figure 6 , a protruding portion is formed on the side of the decorative cover 12 close to the casing body 11, and the protruding portion protrudes from the side surface of the decorative cover 12 close to the casing body 11 in the direction of the decorative cover 12 towards the casing body 11 to serve as the connecting portion 121 to connect the decorative cover 12 and the casing body 11. Specifically, as shown in Figure 3 and Figure 4 , when the decorative cover 12 and the casing body 11 are actually assembled, the outer circumferential surface of the protruding portion is attached to the inner circumferential surface of the first air port 111, and by tightly attaching the outer circumferential surface of the protruding portion to the inner circumferential surface of the first air port 111, on the one hand, the decorative cover 12 and the casing body 11 can be firmly connected; on the other hand, air can not flow between the outer circumferential surface of the protruding portion and the inner circumferential surface of the first air port 111, but flow along the first air port 111 and the second air port 122, thereby ensuring that air will not be dispersed or weakened, and thus helping to improve the heat dissipation efficiency.

[0040] As an optional embodiment, in the present embodiment, as shown in Figure 3 and Figure 4 , the casing body 11 and the decorative cover 12 are a two-shot injection molding structure, the outer circumferential surface of the protruding portion and the inner circumferential surface of the first air port 111 are attached to form a sealing surface of the two-shot injection molding structure, and the sealing surface is away from the second air port 122.

[0041] That is to say, in the actual production process, the shell body 11 and the decorative cover 12 can be made by a two-shot injection molding process to form a two-shot injection molding structure. Due to the particularity of the two-shot injection molding process, a sealing surface is generated at the connection between the shell body 11 and the decorative cover 12. In the present application, the outer circumferential surface of the protruding portion is attached to the inner circumferential surface of the first air port 111 to fix the decorative cover 12 to the shell body 11. Therefore, the outer circumferential surface of the protruding portion and the inner circumferential surface of the first air port 111 are tightly attached to form a sealing surface (i.e., the connecting surface of the connecting portion 121 and the first air port 111) of the two-shot injection molding structure, and the sealing surface is away from the second air port 122. In this way, the second air port 122 and the first air port 111 are not superimposed to form a sleeve hole (or a stepped sleeve hole), which can avoid the situation that the sealing surface and / or misalignment of the second air port 122 and the first air port 111 reduces the ventilation area, and also avoid the situation that the superimposition of the second air port 122 and the first air port 111 forms a sleeve hole (or a stepped sleeve hole) of different colors to affect the appearance. At the same time, when the user observes from the second air port 122 towards the inside of the shell body 11 (i.e., in the direction of the second air port 122 towards the first air port 111), only the inner circumferential surface of the second air port 122 can be seen, and the sealing surface cannot be seen. This avoids the situation that when the decorative cover 12 and the shell body 11 are of different colors, a sleeve hole (or a stepped sleeve hole) of different colors appears at the connection between the two air ports, thereby improving the overall appearance of the shell 10.

[0042] It should be noted that the decorative cover 12 and the shell body 11 can be separately injection molded and then assembled together, or can be connected together by a two-shot injection molding process. Whether it is separately injection molded and then assembled, or two-shot injection molded, the above beneficial effects can be achieved to some extent.

[0043] As an optional embodiment, in the present embodiment, as shown in Figures 3 to 6 the thickness of the protruding portion is equal to the thickness of the shell body 11 at the outer edge of the first air port 111 in the direction of communication between the first air port 111 and the second air port 122. In this way, when the user observes from a direction at an angle to the direction of communication between the first air port 111 and the second air port 122, the protruding portion will not protrude from the shell body 11 at the outer edge of the first air port 111, which can ensure the connection strength of the decorative cover 12 and the shell body 11, and improve the overall appearance of the shell 10.

[0044] As an optional embodiment, in the present embodiment, as shown in Figures 1 to 6As shown, the second air inlet 122 comprises a plurality of strip-shaped air holes 1221 arranged in parallel and at intervals, which can ensure the air volume of the first air inlet 111 and the second air inlet 122, and avoid dust and impurities in the external environment from entering the casing body 11 through the first air inlet 111 and the second air inlet 122. The size of the strip-shaped air holes 1221 and the interval can be set as required.

[0045] As an optional embodiment, in the present embodiment, as shown in Figure 6 As shown, the casing body 11 comprises a first casing 11A and a second casing 11B arranged oppositely, and the decorative cover 12 comprises a first cover 12A and a second cover 12B arranged oppositely, wherein the first casing 11A and the first cover 12A are located on the same side of the casing 10, and the second casing 11B and the second cover 12B are located on the other side of the casing 10. In this way, by separating and buckling the first casing 11A and the second casing 11B, it can be ensured that the motor, the fan and other components can be conveniently installed and disassembled, and at the same time, by locating the first casing 11A and the first cover 12A on the same side of the casing 10 and locating the second casing 11B and the second cover 12B on the other side of the casing 10, the overall appearance symmetry of the casing 10 can be improved, thereby improving the overall aesthetic of the casing 10.

[0046] It should be noted that when the decorative cover 12 and the casing body 11 adopt a two-shot injection structure, the decorative cover 12 and the casing body 11 form one part, and the situations shown in the various exploded views and structural schematic views may not occur. Therefore, in the drawings of the present application, the various exploded views and structural schematic views are only used to more clearly show the structure of the relevant components, and do not limit the present application, for example, the molding method of the decorative cover 12 and the casing body 11 is not limited.

[0047] As an optional embodiment, in the present embodiment, as shown in Figure 6 and Figure 7 As shown, the first air inlet 111 and the second air inlet 122 are arranged on the casing and the cover on one side, and the identification member 123 is arranged on the cover on the other side. In this way, the flow of air in and out of the casing body 11 can be ensured, thereby ensuring the heat dissipation effect of the motor and other components, and the casing 10 can be marked in the form of text or letters by the identification member 123, thereby making the power tools 100 products produced by different manufacturers unique.

[0048] Of course, in other embodiments, the number of the first air vents 111 and the second air vents 122 can also be two, two first air vents 111 are respectively arranged on the first shell 11A and the second shell 11B, and two second air vents 122 are respectively arranged on the first cover 12A and the second cover 12B, so as to increase the air flow in and out of the machine shell body 11 as much as possible, thereby improving the heat dissipation effect of the motor and other parts.

[0049] As shown in Figures 1 to 3 , Figure 6 and Figure 7 , the embodiment of the present application further provides an electric tool 100, which comprises a motor (not shown in the figure), a fan (not shown in the figure) connected with the motor, an output head 20 and the machine shell 10 described above. The motor and the fan are accommodated in the machine shell 10, and the output head 20 is installed at the end of the machine shell 10 and connected with the motor, so as to drive the working head installed on the output head 20 to rotate through the motor. Different models of working heads can be clamped through the output head 20, so as to be suitable for different working requirements. Since the structure and beneficial effects of the machine shell 10 have been described in detail in the foregoing embodiments, they will not be described here.

[0050] As an optional implementation, as shown in Figure 6 and Figure 7 , the electric tool 100 further comprises a start switch 30 and a gear knob 40, which are respectively movably connected to the outer wall of the machine shell 10. In this way, the start and stop of the motor can be controlled through the start switch 30, and the corresponding working mode can be adjusted through the different rotating positions of the gear knob 40.

[0051] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A housing, characterized by The machine shell comprises a machine shell body and a decorative cover fixedly connected with the machine shell body, the machine shell body is used for accommodating a motor of an electric tool and a fan connected with the motor, a first air port corresponding to the fan is arranged on the machine shell body, the decorative cover has a connecting portion connected with the first air port, a second air port in communication with the first air port is arranged on the connecting portion, and a connecting surface of the connecting portion and the first air port is spaced from the second air port in a direction from the second air port to the first air port.

2. The enclosure of claim 1, wherein, The connecting portion is a protruding portion arranged on a side of the decorative cover close to the machine shell body, and an outer peripheral surface of the protruding portion is attached to an inner peripheral surface of the first air port.

3. The enclosure of claim 2, wherein, The machine shell body and the decorative cover are a secondary injection molding structure, the outer peripheral surface of the protruding portion and the inner peripheral surface of the first air port are attached to form a sealing surface of the secondary injection molding structure, and the sealing surface is away from the second air port.

4. The enclosure of claim 2, wherein, In a communication direction of the first air port and the second air port, the thickness of the protruding portion is equal to the thickness of the machine shell body at an outer edge of the first air port.

5. The enclosure of claim 1, wherein, The second air port comprises a plurality of strip-shaped heat dissipation holes, and the plurality of strip-shaped heat dissipation holes are arranged in parallel and at intervals.

6. The enclosure of claim 1, wherein, The machine shell body comprises a first shell and a second shell arranged oppositely, and the decorative cover comprises a first cover and a second cover arranged oppositely, wherein the first shell and the first cover are located on the same side of the machine shell, and the second shell and the second cover are located on the other side of the machine shell.

7. The enclosure of claim 6, wherein, The first air port and the second air port are arranged on the shell and the cover on one side, and an identification member is arranged on the cover on the other side.

8. The enclosure of claim 6, wherein, The number of the first air port and the second air port is two, the two first air ports are arranged on the first shell and the second shell respectively, and the two second air ports are arranged on the first cover and the second cover respectively.

9. A power tool characterized by comprising: The machine shell, the electric machine, the fan connected with the electric machine, and an output head are arranged in the machine shell, and the output head is mounted on an end portion of the machine shell and connected with the electric machine.

10. The power tool of claim 9, wherein, A starting switch and a gear shifting knob are further arranged, and the starting switch and the gear shifting knob are movably connected with an outer wall of the machine shell.

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