CN211073917U

CN211073917U - Cutting device

Info

Publication number: CN211073917U
Application number: CN201921426129.3U
Authority: CN
Inventors: 龚早京; 潘兰志; 施金海
Original assignee: Jiangsu Dongcheng M&e Tools Co ltd
Current assignee: Jiangsu Dongcheng M&e Tools Co ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-07-24
Anticipated expiration: 2029-08-29

Abstract

A cutting device, comprising: the saw blade fixing device comprises a main body, a driving assembly fixed on the main body, a saw blade connected to the driving assembly, a fixing shield at least partially covering the saw blade and a control assembly arranged on the outer side of the fixing shield, wherein the driving assembly drives the saw blade to rotate in the fixing shield; the fixed shield includes a first window adjacent to the control assembly, the control assembly includes a heat sink plate at least partially exposed to the first window, and an air flow generated by rotation of the saw blade is blown to the surface of the heat sink plate through the first window. The utility model discloses a set up first window on fixed guard shield, and expose control assembly's heating panel in first window, blow the surface of heating panel with the air current that the saw bit rotation produced, take away the heat on heating panel surface to cool off the heating panel, effectively improve control assembly's radiating effect.

Description

Cutting device

[ technical field ]

The utility model relates to a cutting device, in particular to cutting device that building, fitment occasion were used.

[ background art ]

The cutting device is a widely used electric tool, is commonly used for cutting various materials such as metal, non-metal plastic, carbon fiber and the like, and is particularly suitable for sawing aluminum doors and windows, wood boards, paper tubes and sectional materials. The cutting devices of the prior art generally comprise a control device for controlling the operation of the motor, the control device containing internally a circuit board, which is a high heating element, and therefore requires an effective heat dissipation of the entire control device.

Please refer to chinese utility model No. 201420031039.5 issued on 03/09/2014, which discloses an electric tool including a motor, a motor fan and a controller, wherein the rotation of the motor fan causes cooling air sucked into the motor to flow into the controller through a vent hole on the controller to cool the controller. However, the amount of air blown to the controller by the motor fan is small, so that the amount of air flowing into the controller is small, and the overall heat dissipation effect is poor.

Accordingly, there is a need for an improved cutting device that overcomes the deficiencies of the prior art.

[ contents of utility model ]

Not enough to prior art, an object of the utility model is to provide a cutting device that the radiating effect is good.

The utility model provides a prior art problem can adopt following technical scheme: a cutting device, comprising: the saw comprises a main body, a driving assembly fixed on the main body, a saw blade connected to the driving assembly, a fixed shield at least partially covering the saw blade and a control assembly arranged on the outer side of the fixed shield, wherein the driving assembly drives the saw blade to rotate in the fixed shield; the fixed shield comprises a first window adjacent to the control assembly, the control assembly comprises a heat dissipation plate at least partially exposed to the first window, and air flow generated by rotation of the saw blade is blown to the surface of the heat dissipation plate through the first window.

The further improvement scheme is as follows: the control assembly comprises a shell and a second window arranged on the shell, the second window is opposite to the first window, and the heat dissipation plate is contained in the shell and attached to the second window.

The further improvement scheme is as follows: the control assembly includes a seal around the periphery of the second window, the seal being located between the second window and the heat sink, the heat sink being pressed against the seal.

The further improvement scheme is as follows: the control assembly further includes ribs disposed on both sides of the second window, the ribs protruding inward from an inner wall surface of the housing, the sealing member and the heat radiating plate being disposed between the ribs.

The further improvement scheme is as follows: the control assembly comprises a circuit board accommodated in the shell, the circuit board is connected to the heat dissipation plate, and the circuit board and the second window are respectively arranged on two sides of the heat dissipation plate.

The further improvement scheme is as follows: the case is made of an insulating material, and the heat dissipation plate is made of a metal material.

The further improvement scheme is as follows: the first window is arranged on one side, where the saw blade rotates to enter the fixed shield, and the control assembly is adjacent to the first window of the fixed shield.

The further improvement scheme is as follows: the driving assembly comprises an output shaft protruding into the fixed shield, the saw blade is fixedly arranged on the output shaft, and the driving assembly drives the output shaft to drive the saw blade to rotate.

The further improvement scheme is as follows: the driving assembly comprises a driving shell installed on the outer side of the fixed shield, a fan accommodated in the driving shell and an opening formed in the driving shell, the shell of the control assembly comprises an air inlet close to the opening and an air outlet located on one side opposite to the air inlet, and airflow generated by the fan is blown out of the opening, enters the control assembly through the air inlet and is discharged from the air outlet.

The further improvement scheme is as follows: the side surface of the heat dissipation plate facing the first window is provided with a plurality of grid-shaped depressions.

Compared with the prior art, the utility model discloses following beneficial effect has: through set up first window on fixed guard, and expose control assembly's heating panel in first window, blow the surface of heating panel with the air current that the saw bit rotation produced, take away the heat on heating panel surface to cool off the heating panel, effectively improve control assembly's radiating effect. The first window is arranged on one side, where the saw blade rotates to enter the fixed protective cover, so that the heat dissipation effect of the control assembly is further improved. The driving assembly is provided with the opening, the control assembly is correspondingly provided with the air inlet and the air outlet, and the air flow generated by rotation of the fan is utilized to dissipate heat inside the control assembly, so that the structure is simple, and the heat dissipation effect is good. The rib parts are arranged, so that the positioning and the installation of the sealing piece and the heat dissipation plate are facilitated; the sealing piece is arranged, so that cutting scraps generated when the saw blade is sawed can be effectively prevented from entering the control assembly, and the control assembly can be damaged.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

FIG. 1 is a schematic view of the cutting device of the present invention;

FIG. 2 is a schematic view of a portion of the components of the cutting apparatus shown in FIG. 1;

FIG. 3 is a cross-sectional view of a portion of the assembly of the cutting device of FIG. 2;

FIG. 4 is an exploded view of the guard and control assembly of the cutting device of FIG. 1;

FIG. 5 is a schematic view of the configuration of the guard and control assembly of the cutting device of FIG. 4;

fig. 6 is a schematic view showing the structure of the heat radiating plate and the circuit board in fig. 4.

The meaning of the reference symbols in the figures:

100. cutting device 1, main body 2, drive assembly 21, output shaft 22, fan 23, opening 24, drive housing 25, motor 3, saw blade 4, fixed shield 41, first window 42, motor mounting portion 5, control assembly 51, casing 511, air inlet 512, air outlet 52, second window 53, heat dissipation plate 54, circuit board 541, main board 542, MOS tube 543, screw 55, rib 56, sealing member 6, base

[ detailed description of the invention ]

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

Referring to fig. 1, an embodiment of the present invention relates to a cutting device 100, the cutting device 100 includes a base 6, a main body 1 installed on an upper side of the base 6, a driving assembly 2 fixed on the main body 1, a saw blade 3 connected to the driving assembly 2, a fixed shield 4 at least partially covering the saw blade 3, and a control assembly 5 installed on an outer side of the fixed shield 4, wherein the control assembly 5 is used for controlling the driving assembly 2 to start and close, and the driving assembly 2 drives the saw blade 3 to rotate in the fixed shield 4.

Referring to fig. 2 and 3, the driving assembly 2 includes a driving housing 24 mounted to an outer side of the fixed guard 4, a motor 25 and a fan 22 accommodated in the driving housing 24, and an opening 23 opened in the driving housing 24, wherein the motor 25 includes an output shaft 21 protruding into the fixed guard 4, and the saw blade 3 is fixedly mounted on the output shaft 21. When the cutting device 100 is in operation, the control device 5 activates the motor 25 to drive the output shaft 21 to rotate and drive the saw blade 3 to rotate for performing a sawing operation, and the fan 22 is used for cooling and dissipating heat of the motor 25.

In the present embodiment, the control module 5 includes a hollow housing 51, the housing 51 includes an air inlet 511 adjacent to the opening 23 of the driving module 2 and an air outlet 512 located on the opposite side of the air inlet 511, and the air flow generated by the fan 22 is blown out from the opening 23, enters the interior of the control module 5 through the air inlet 511, and is discharged from the air outlet 512. The opening 23 is arranged on the driving component 2, the air inlet 511 and the air outlet 512 are correspondingly arranged on the control component 5, and the air flow generated by the rotation of the fan 22 is utilized to dissipate heat inside the control component 5, so that the structure is simple, and the heat dissipation effect is good.

Referring to fig. 4 and 5, the fixed shield 4 includes a first window 41 adjacent to the control assembly 5 and a motor mounting portion 42 beside the first window 41, and the motor 25 of the driving assembly 2 is fixedly mounted to the motor mounting portion 42. The control unit 5 includes a second window 52 opened on the housing 51, and a heat radiating plate 53 and a circuit board 54 accommodated in the housing 51. The circuit board 54 is connected to the heat dissipating plate 53, the circuit board 54 and the second window 52 are respectively arranged on two sides of the heat dissipating plate 53, the second window 52 is arranged opposite to the first window 41, the heat dissipating plate 53 is attached to the second window 52, and at least a part of the heat dissipating plate 53 is exposed to the first window 41, when the cutting device 100 works, the air flow generated by the rotation of the saw blade 3 is blown to the surface of the heat dissipating plate 53 through the first window 41. Through set up first window 41 on fixed guard shield 4, and expose control assembly 5's heating panel 53 in first window 41, blow the air current that saw bit 3 rotation produced to the surface of heating panel 53, take away the heat on heating panel 53 surface to cool off heating panel 53, effectively improve control assembly 5's radiating effect.

In the present embodiment, the control unit 5 further includes a sealing member 56 surrounding the outer periphery of the second window 52 and ribs 55 disposed on both sides of the second window 52. The rib 55 protrudes inward from the inner wall surface of the housing 51, and the sealing member 56 and the heat dissipation plate 53 are both disposed between the rib 55, the sealing member 56 is located between the second window 52 and the heat dissipation plate 53, and the heat dissipation plate 53 is pressed against the sealing member 56. Positioning and mounting of the sealing member 56 and the heat dissipation plate 53 are facilitated by providing the rib 55; the sealing member 56 is provided to effectively prevent chips generated when the saw blade 3 performs sawing from entering the inside of the control assembly 5 to damage the control assembly 5.

Preferably, the heat radiating plate 53 is made of a metal material, and the case 51 is made of an insulating material. The heat sink 53 made of metal has excellent heat dissipation performance, and the insulating performance of the control unit 5 is effectively ensured by matching with the housing 51 made of insulating material.

Preferably, the side of the heat dissipation plate 53 facing the first window 41 is provided with a plurality of grid-shaped depressions, so as to increase the heat dissipation area of the heat dissipation plate 53, thereby improving the heat dissipation performance of the heat dissipation plate 53.

Preferably, the first window 41 is opened at a side where the saw blade 3 rotates into the fixed guard 4, and the control assembly 5 is adjacent to the first window 41 of the fixed guard 4. The air volume when the saw blade 3 rotates to enter the fixed shield 4 is the largest, and the first window 41 is opened at one side of the saw blade 3 which rotates to enter the fixed shield 4, so that the heat dissipation effect of the control assembly 5 is further improved.

Referring to fig. 6, the circuit board 54 includes a main board 541, a MOS transistor 542 protruding from the main board 541 toward the heat dissipation plate 53, and a screw 543 for fixing the circuit board 54 to the heat dissipation plate 53, wherein the MOS transistor 542 abuts against the heat dissipation plate 53. Since the MOS tube 542 generates a large amount of heat, the MOS tube 542 is in direct contact with the heat dissipation plate 53 to perform heat transfer, thereby effectively improving the heat dissipation efficiency of the circuit board 54.

The utility model discloses a set up first window 41 on fixed guard shield 4, and expose control assembly 5's heating panel 53 in first window 41, rotate the air current that produces with saw bit 3 and blow to heating panel 53's surface, take away the heat on heating panel 53 surface to cool off heating panel 53, effectively improve control assembly 5's radiating effect. The first window 41 is opened at the side where the saw blade 3 rotates to enter the fixed shield 4, so that the heat dissipation effect of the control assembly 5 is further improved. The driving assembly 2 is provided with the opening 23, the control assembly 5 is correspondingly provided with the air inlet 511 and the air outlet 512, and the air flow generated by the rotation of the fan 22 is utilized to dissipate heat inside the control assembly 5, so that the structure is simple, and the heat dissipation effect is good. And is provided with a rib 55 for facilitating positioning and mounting of the sealing member 56 and the heat radiating plate 53; the sealing member 56 is provided to effectively prevent chips generated when the saw blade 3 performs sawing from entering the inside of the control assembly 5 to damage the control assembly 5.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many other alternatives to the cutting device of the present invention may be devised without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.

Claims

1. A cutting device (100) comprising: the saw blade fixing device comprises a main body (1), a driving assembly (2) fixed on the main body (1), a saw blade (3) connected to the driving assembly (2), a fixing shield (4) at least partially covering the saw blade (3), and a control assembly (5) installed on the outer side of the fixing shield (4), wherein the driving assembly (2) drives the saw blade (3) to rotate in the fixing shield (4); the method is characterized in that: the fixed shield (4) comprises a first window (41) adjacent to the control assembly (5), the control assembly (5) comprises a heat dissipation plate (53) at least partially exposed to the first window (41), and air flow generated by rotation of the saw blade (3) is blown to the surface of the heat dissipation plate (53) through the first window (41).

2. The cutting device (100) according to claim 1, wherein: the control assembly (5) comprises a shell (51) and a second window (52) arranged on the shell (51), the second window (52) is arranged opposite to the first window (41), and the heat dissipation plate (53) is accommodated in the shell (51) and is attached to the second window (52).

3. The cutting device (100) according to claim 2, wherein: the control assembly (5) includes a seal (56) surrounding an outer periphery of the second window (52), the seal (56) being located between the second window (52) and the heat dissipation plate (53), the heat dissipation plate (53) being pressed against the seal (56).

4. The cutting device (100) according to claim 3, wherein: the control assembly (5) further includes ribs (55) provided on both sides of the second window (52), the ribs (55) protruding inward from an inner wall surface of the housing (51), the sealing member (56) and the heat radiating plate (53) being disposed between the ribs (55).

5. The cutting device (100) according to claim 2, wherein: the control assembly (5) comprises a circuit board (54) accommodated in the shell (51), the circuit board (54) is connected with the heat dissipation plate (53), and the circuit board (54) and the second window (52) are respectively arranged on two sides of the heat dissipation plate (53).

6. The cutting device (100) according to claim 2, wherein: the case (51) is made of an insulating material, and the heat dissipation plate (53) is made of a metal material.

7. The cutting device (100) according to claim 1, wherein: the first window (41) is arranged on one side, where the saw blade (3) rotates to enter the fixed shield (4), and the control assembly (5) is adjacent to the first window (41) of the fixed shield (4).

8. The cutting device (100) according to claim 1, wherein: the driving assembly (2) comprises an output shaft (21) protruding into the fixed shield (4), the saw blade (3) is fixedly arranged on the output shaft (21), and the driving assembly (2) drives the output shaft (21) to drive the saw blade (3) to rotate.

9. The cutting device (100) according to claim 8, wherein: the driving assembly (2) comprises a driving shell (24) mounted to the outer side of the fixed shield (4), a fan (22) accommodated in the driving shell (24) and an opening (23) opened on the driving shell (24), the shell (51) of the control assembly (5) comprises an air inlet (511) adjacent to the opening (23) and an air outlet (512) located on the opposite side of the air inlet (511), and air flow generated by the fan (22) is blown out of the opening (23), enters the control assembly (5) through the air inlet (511) and is discharged from the air outlet (512).

10. The cutting device (100) according to claim 1, wherein: the side of the heat dissipation plate (53) facing the first window (41) is provided with a plurality of grid-shaped depressions.