CN220030507U

CN220030507U - Hand-held electric saw

Info

Publication number: CN220030507U
Application number: CN202320923026.8U
Authority: CN
Inventors: 陈帮楠; 刘光源; 胡志春
Original assignee: Zhejiang Kaichuang Electric Co ltd
Current assignee: Zhejiang Kaichuang Electric Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-11-17
Anticipated expiration: 2033-04-20

Abstract

The utility model relates to the technical field of electric tools, in particular to a handheld electric saw. This hand-held power saw includes: the wind shielding component is used for blocking part of airflow from the first air channel to the second air channel, the fan blade is rotatably arranged in the second air channel, the first air channel is provided with an air inlet, the second air channel is provided with an air outlet, and the control device is located on an air flow path between the air inlet and the air outlet. According to the handheld electric saw, the air flow in the first shell and the second shell is guided through the simple structure, and the flowing air flow is utilized to exchange heat with the control device, so that the temperature of the control device is effectively reduced, and the heat dissipation efficiency is improved.

Description

Hand-held electric saw

Technical Field

The utility model relates to the technical field of electric tools, in particular to a handheld electric saw.

Background

Hand-held power saws are a common type of wood working equipment that is widely appreciated for its convenience and flexibility. However, during use, the motor and control of the hand-held power saw may generate a significant amount of heat, resulting in overheating of the device. Overheating not only affects the proper operation of the equipment, but may also cause equipment damage or even fire. In the prior art, the aluminum shell is used for radiating, but the aluminum shell has certain limitation, when the power is larger and the current is higher, the volume of the aluminum shell is larger, and the structural design space is enlarged.

Disclosure of Invention

The utility model aims to at least solve the problem that the control device of the electric tool has poor heat dissipation effect in a small space. The aim is achieved by the following technical scheme:

a first aspect of the present utility model proposes a hand held electric saw comprising:

a control device;

a first housing in which the control device is housed;

the second shell is internally provided with a first air channel and a second air channel which are communicated with each other, and the second air channel is communicated with the inside of the first shell;

a wind blocking member disposed between the first air duct and the second air duct, the wind blocking member for blocking a portion of the airflow from the first air duct to the second air duct;

the fan blade is rotatably arranged in the second air duct;

the first shell is provided with an air inlet, the second air duct is provided with an air outlet, and the control device is located on a gas flow path between the air inlet and the air outlet.

According to the handheld electric saw, the first shell is communicated with the second air duct of the second shell, and because the wind shielding component is arranged between the first air duct and the second air duct to prevent part of air flow from flowing from the first air duct to the second air duct, the air flow in the first shell and the second shell is guided through the structure, and the flowing air flow is utilized to exchange heat with the control device, so that the temperature of the control device is effectively reduced, and the heat dissipation efficiency is improved. The combined structure of the first shell and the second shell does not need to enlarge the volume, and the heat dissipation efficiency can be improved in a small space range.

In addition, the hand-held electric saw according to the utility model may have the following additional technical features:

in some embodiments of the present utility model, the first housing is provided with a first through hole communicated with the second air duct.

In some embodiments of the utility model, the control device is located in the gas flow path between the inlet vent and the first through hole.

In some embodiments of the present utility model, a second through hole is formed in the second housing, and the interior of the first housing is communicated with the second air duct through the first through hole and the second through hole.

In some embodiments of the utility model the wind shield member is an annular wind shield ring.

In some embodiments of the present utility model, the wind shielding member is provided with a plurality of ventilation holes, and the plurality of ventilation holes communicate with the first air duct and the second air duct.

In some embodiments of the utility model, the fan blade is a straight blade.

In some embodiments of the present utility model, the air inlet is provided with a first filter screen, and/or the air outlet is provided with a second filter screen.

In some embodiments of the present utility model, the handheld electric saw further includes an air outlet channel, the air outlet channel is communicated with the second air duct through the air outlet, and the air outlet channel is disposed outside the second air duct.

In some embodiments of the present utility model, the handheld electric saw further includes a motor, the motor is installed in the first air duct, and a rotating shaft of the motor is in interference fit with the fan blade.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 schematically illustrates a partial schematic construction of a partial hand-held power saw according to an embodiment of the present utility model;

FIG. 2 is a partial elevation view of a hand held power saw according to an embodiment of the present utility model;

FIG. 3 is a partial left side view of a hand held power saw according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view taken along the A-A plane in FIG. 3;

fig. 5 schematically shows a schematic structural view of a first housing according to an embodiment of the present utility model;

FIG. 6 is a front view of the first housing of the embodiment of the present utility model;

FIG. 7 is a left side view of the first housing of the embodiment of the present utility model;

FIG. 8 is a cross-sectional view taken along the B-B plane in FIG. 7;

fig. 9 schematically shows a structural schematic of a second housing according to an embodiment of the present utility model;

fig. 10 is a front view of the second housing of the embodiment of the present utility model;

FIG. 11 is a cross-sectional view of the C-C plane of FIG. 10;

fig. 12 is a left side view of the second housing of the embodiment of the present utility model;

fig. 13 schematically shows a schematic structural view of a second housing removed portion housing according to an embodiment of the present utility model;

FIG. 14 schematically illustrates a structural diagram of a hand-held power saw in accordance with an embodiment of the present utility model;

fig. 15 is an elevation view of a hand held power saw according to an embodiment of the present utility model.

The reference numerals are as follows:

100. hand-held electric saw; 101. a motor; 102. a control device; 103. an electric saw housing; 104. a cutting blade;

10. a first housing; 11. a first air inlet; 12. a first through hole;

20. a second housing; 21. an air outlet; 22. a second air inlet; 23. a second through hole;

30. a through hole;

40. a wind shielding member;

50. and (5) a fan blade.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

As shown in fig. 1 to 15, according to an embodiment of the present utility model, a handheld electric saw 100 is provided, the handheld electric saw 100 includes a control device 102, a first housing 10, a second housing 20, a wind shielding component 40 and a fan blade 50, the control device 102 is accommodated and installed in the first housing 10, the first housing 10 is provided with an air inlet, a first air duct and a second air duct which are communicated are arranged in the second housing 20, the first housing 10 is arranged in communication with the second air duct, and an air outlet 21 is arranged. The control device 102 is located in the gas flow path between the inlet and outlet 21 wherein the wind shield 40 is arranged between the first and second air duct, the wind shield 40 being adapted to block part of the gas flow from the first air duct to the second air duct. In addition, the fan blade 50 is rotatably disposed in the second air duct, and the fan blade 50 is connected to the rotating shaft of the motor 101.

According to the handheld electric saw 100 of the present utility model, the first casing 10 is communicated with the second air duct of the second casing 20, and the wind shielding member 40 is disposed between the first air duct and the second air duct to block part of the air flow from the first air duct to the second air duct, so that the air flow in the first casing and the second casing is guided by the above structure, and the flowing air flow is utilized to exchange heat with the control device, so that the temperature of the control device 102 is effectively reduced, and the heat dissipation efficiency is improved. The combined structure of the first housing 10 and the second housing 20 does not need to enlarge the volume, and the heat dissipation efficiency can be improved in a small space.

It should be understood that the first housing 10 is provided with a through hole 30 at a position where it contacts the second air duct. The first air duct and the second air duct can be communicated in various ways, and the first shell 10 and the second air duct can be communicated through a pipeline, but the first shell 10 and the second air duct are communicated through the pipeline, so that the structure is more complex, and the manufacturing cost is increased. In this embodiment, the first casing 10 is communicated with the second air duct through the through hole 30, so that the structure is simple, and the heat dissipation effect can be determined according to the size of the through hole 30.

Specifically, the through hole 30 is arranged in such a manner that a first through hole 12 communicated with a second air duct is formed in the first casing 10, a second through hole 23 is formed in the second casing 20 at a position corresponding to the first through hole 12, the first through hole 12 and the second through hole 23 cooperate to form a complete through hole 30, and the interior of the first casing 10 is communicated with the second air duct through the first through hole 12 and the second through hole 23.

It should be understood that the air inlet is disposed on the first housing 10 and is remote from the first through hole 12. The air inlet is arranged at one side close to the control device 102, and air flows into the control device 102 from the air inlet, so that the air flow is cooler, and the cooling effect of the control device 102 is improved. The air inlet is far away from the first through hole 12 as far as possible, so that the length of the airflow channel is increased, the cooling area of the control device 102 is increased, and the cooling effect of the control device 102 is further improved.

It should be understood that there may be two air inlets, and the first air inlet 11 is disposed in the first housing 10 near the control device 102, and the control device 102 is located in the air flow path between the first air inlet 11 and the first through hole 12. The second air duct of the second housing 20 is also provided with a second air inlet 22, and the air flow entering through the second air inlet 22 mainly cools the motor 101, and the flow path of the air flow passes through the wind shielding component 40 after entering from the second air inlet 22, is sucked into the fan blade 50, and finally flows out from the air outlet 21.

Then there are two air streams at this time, one of which is to cool down the motor 101 as described above. The other air flow flows into the first casing 10 from the first air inlet 11, then flows into the second casing 20 through the through hole between the first casing 10 and the second casing 20, and finally flows out from the air outlet 21 after being sucked by the fan blade 50. The air flow flowing in from the first air inlet 11 mainly cools the control device 102.

It will be appreciated that the wind blocking member 40 is an annular wind blocking ring. The wind shielding member 40 is disposed along the circumferential direction of the inner wall of the second casing 20. The wind shielding member 40 divides the second housing 20 into a first wind channel and a second wind channel. The motor 101 is arranged in a first air duct and a second air duct is provided with an air outlet 21. Because the motor 101 is generally cylindrical, and the rotating shaft of the motor 101 is also cylindrical, the wind shielding member 40 is an annular wind shielding ring, the rotating shaft of the motor 101 passes through an inner hole of the annular wind shielding ring, and the aperture of the inner hole can determine the flow rate of the air flow of the first air channel flowing to the second air channel blocked by the wind shielding member 40. When more airflow is required to be blocked, the inner hole can be as close to the rotating shaft of the motor 101 as possible, so that the airflow blocking flow is increased, and the airflow speed is accelerated.

Specifically, the wind shielding member 40 may further be provided with a plurality of ventilation holes, and the plurality of ventilation holes are communicated with the first air duct and the second air duct. The outer side of the wind shielding member 40 may be completely attached to the circumference of the inner wall of the second housing 20, and the inner side may be attached to the rotating shaft of the motor 101 as much as possible, but in this case, a plurality of ventilation holes need to be formed in the wind shielding member 40, and the aperture of the ventilation holes is determined according to the heat dissipation requirement required by the control device 102. The vent holes may be arranged in a uniform arrangement along the circumferential direction of the wind shielding member 40. The vent holes arranged on the wind shielding part 40 can divide the original atmospheric air flow in the middle of the wind shielding part 40 into a plurality of small air flows, so that the flow speed and the flow rate of the air flows are improved and the noise reduction effect is also achieved in a flow dividing mode.

It will be appreciated that a plurality of ventilation apertures may be provided when the wind deflector 40 is an annular wind deflector. The inner hole of the annular wind guard ring can pass through most of the air flow, and the vent hole can also pass through a small part of the air flow, and the specific setting mode is determined according to the heat dissipation requirement of the control device 102.

It is understood that the fan blade 50 is a straight blade type fan blade 50. The straight blade 50 is a key component of the centrifugal fan, and corresponds to the handheld electric saw 100 in which the centrifugal fan is built. The straight blade type fan blade 50 is arranged in the second air duct, and the air inlet is arranged at one end of the first shell 10 away from the air outlet 21. The motor 101 is disposed within the first air duct. The straight blade 50 sucks air flow into the top of the straight blade 50 from the air inlet, and then discharges the air flow from the bottom and the side of the straight blade 50. The fan blade 50 is arranged as a straight blade type fan blade 50, so that the flow speed of the air flow can be enhanced, and the dust blowing effect is improved.

It should be understood that the air outlet 21 of the second air duct is provided with a first filter screen. The first filter screen is used to prevent wood chips from entering the hand-held power saw 100 from the air outlet 21. The first filter may be completely covered on the outer side of the air outlet 21, or may be disposed on the inner side of the air outlet 21, that is, the first filter is connected to the inner wall of the air outlet 21 in the circumferential direction.

It is to be understood that the air inlet is provided with a second filter screen. Under the abominable condition of operating mode, the air that the air intake got into probably carries a large amount of impurity, leads to motor 101 to damage, sets up a second filter screen with air intake department now, can prevent effectively that impurity from entering into in first casing 10 or the motor 101, has improved motor 101's life.

It should be appreciated that the handheld power saw 100 further includes an air outlet channel, which is in communication with the air outlet 21, i.e., the air outlet channel is in communication with the second air duct. The hand-held power saw 100 is also provided with an air outlet channel to direct air flow in a narrow range.

Specifically, the inner side of the air outlet channel may be provided with a sound damping structure. The noise elimination structure can be a grid, the grid is arranged along the circumference of the inner wall of the air outlet channel, the grid divides the air flow into a plurality of small air flows, the noise of the air flow is reduced, meanwhile, the grid also absorbs the kinetic energy of a part of the air flow, and the noise of the air flow is further reduced. The inside noise elimination structure that is provided with of air-out passageway can protect user's hearing.

It should be understood that the first housing 10 may be divided into two halves, a left half-shell and a right half-shell, which are detachably connected. The left half shell and the right half shell can be connected in a bolt mode. When the inside of the first casing 10 needs to be cleaned, the left and right half casings can be disassembled to clean the inside of the first casing 10.

Specifically, the hand-held power saw 100 further includes a power saw housing 103 and a motor 101.

The motor 101 is arranged in the second shell 20, and the rotating shaft of the motor 101 is in interference fit with the fan blade 50.

Specifically, the hand-held power saw 100 should further include a cutting blade 104, with the cutting blade 104 being partially housed within the power saw housing 103. The layout positions of the cutting blade 104 and the handheld electric saw 100 are coordinated with each other in the electric saw housing 103, so that the air flow can radiate heat to the control device 102 and the motor 101 after passing through the handheld electric saw 100 during cutting, and the radiating effect is improved.

In particular, the hand-held power saw 100 may be either a wired or wireless type. When the handheld electric saw 100 is in a wireless manner, an electric storage module, which may be a lithium battery, should be further disposed inside the handheld electric saw 100.

Specifically, the grip position of the first housing 10 of the handheld electric saw 100 is made of an anti-slip material, for example, a layer of rubber material is attached to the surface, so that the stability of the grip of an operator in the use process can be improved.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. A hand-held power saw, comprising:

a control device;

a first housing in which the control device is housed;

the fan blade is rotatably arranged in the second air duct;

2. The hand-held power saw of claim 1, wherein the first housing is provided with a first through hole in communication with the second air duct.

3. The hand held power saw of claim 2, wherein the control device is located in a gas flow path between the air inlet and the first through hole.

4. The hand-held power saw of claim 2, wherein the second housing is provided with a second through hole, and the interior of the first housing is in communication with the second air duct through the first through hole and the second through hole.

5. The hand held power saw of claim 1, wherein the wind blocking member is an annular wind blocking ring.

6. The hand-held power saw of claim 1, wherein the wind blocking member is provided with a plurality of vent holes, the plurality of vent holes communicating the first air channel and the second air channel.

7. The hand-held power saw of claim 1, wherein the blade is a straight blade.

8. The hand-held power saw of claim 1, wherein a first screen is provided at the air inlet;

and/or the air outlet is provided with a second filter screen.

9. The hand-held power saw of claim 1, further comprising an air outlet channel in communication with the second air duct through the air outlet, and wherein the air outlet channel is disposed outside the second air duct.

10. The hand-held power saw of any one of claims 1-9, including a motor mounted within said first air duct, a shaft of said motor being in interference fit with the blade.