Cutting device

Abstract

A cutting device comprises a shell, a motor assembly installed in the shell and a controller assembly electrically connected to the motor assembly, the motor assembly comprises a first fan and a second fan which are installed at the two axial ends, and the shell comprises a motor shell containing the motor assembly and a controller shell containing the controller assembly; the cutting device is provided with a first air duct for cooling the motor assembly and a second air duct for cooling the controller assembly, the motor shell and the controller shell are constructed into two parts, and the first air duct and the second air duct are arranged independently. Through the arrangement, the first air channel and the second air channel can conduct heat dissipation on the motor assembly and the controller assembly correspondingly, the problem that the heat dissipation effect is poor due to series connection of the air channels is solved, and the heat dissipation effect of the cutting device is better after the controller assembly is arranged; in addition, the control panel and the EMC module assembly extend in the axis direction of the motor assembly, the size of the whole machine is more compact, and miniaturization of the cutting device is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of power tools, in particular to a cutting device. Background Art

[0002] A cutting device is used to cut workpieces, such as materials like wood, stone, metal, etc. It usually uses a motor to drive a cutting disc to rotate to achieve the cutting operation. Since the current market has higher and higher requirements for the power of the cutting device and also has requirements for the lightweight of the cutting device, in view of this, the cutting device using a brushless motor has gradually become the mainstream in the market. The brushless motor needs to be electrically connected to a circuit board to control its operation. At the same time, the current market strictly controls EMC interference, so an EMC module needs to be set in the cutting device. When the circuit board and the EMC module are set in the cutting device at the same time, it is impossible to dissipate heat well for the motor, the circuit board and the EMC module at the same time. In addition, the control board of the cutting device has a large size, and the high power requirement leads to a large size of the EMC module, which in turn causes the overall size of the machine to become larger.

[0003] In view of this, it is necessary to provide an improved cutting device to overcome the defects existing in the prior art. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a cutting device, which has good heat dissipation effect and a more compact structure.

[0005] The technical solution adopted by the utility model to solve the problems of the prior art is: a cutting device, including a housing, a motor assembly installed in the housing, and a controller assembly electrically connected to the motor assembly. The motor assembly includes a first fan and a second fan installed at both axial ends. The housing includes a motor housing for accommodating the motor assembly and a controller housing for accommodating the controller assembly. The cutting device is provided with a first air duct for cooling the motor assembly and a second air duct for cooling the controller assembly. The motor housing and the controller housing are constructed as two components, and the first air duct and the second air duct are independently arranged.

[0006] A further improvement scheme is: the first air duct has a first air inlet and a first air outlet that are interconnected, the second air duct has a second air inlet and a second air outlet that are interconnected, and the first air inlet, the second air inlet and the second air outlet are located on the same side of the housing.

[0007] A further improvement solution is as follows: The housing includes a motor end cover covering the end of the motor housing and a controller end cover covering the end of the controller housing. The second air inlet is opened on the controller end cover, and the first air inlet and the second air outlet are both opened on the motor end cover.

[0008] A further improvement solution is as follows: There is an interconnected intermediate hole between the motor housing and the controller housing. External air enters the interior of the controller housing from the second air inlet, flows through the controller assembly, then enters the interior of the motor housing via the intermediate hole, and finally exits from the second air outlet.

[0009] A further improvement solution is as follows: The intermediate hole and the second air inlet are located at both ends of the controller assembly, and the intermediate hole is located on the side wall of the controller housing facing the motor assembly.

[0010] A further improvement solution is as follows: The housing includes a main housing connected to the motor housing. The main housing and the motor end cover are located at both ends of the motor housing, and the first air outlet is opened on the main housing.

[0011] A further improvement solution is as follows: The motor end cover and the controller end cover are integrally injection-molded.

[0012] A further improvement solution is as follows: The controller assembly includes a control board and an EMC module assembly, and both the control board and the EMC module assembly extend along the axis direction of the motor assembly.

[0013] A further improvement solution is as follows: The cutting device includes a holding part connected to the motor housing and the main housing. The holding part and the housing are of an integral structure, and the motor assembly and the controller assembly are located on the same side of the holding part.

[0014] A further improvement solution is as follows: The controller housing is connected to the holding part.

[0015] Compared with the prior art, the utility model has the following beneficial effects: The cutting device is provided with a first air duct for cooling the motor assembly and a second air duct for cooling the controller assembly. The motor housing and the controller housing are constructed as two components, and the first air duct and the second air duct are independently arranged. With this arrangement, the first air duct and the second air duct can respectively dissipate heat from the motor assembly and the controller assembly, and there will be no problem of poor heat dissipation caused by the series connection of the air ducts, making the heat dissipation effect of the cutting device better after the controller assembly is provided; in addition, both the control board and the EMC module assembly extend along the axis direction of the motor assembly, making the overall size of the machine more compact, which is beneficial to the miniaturization of the cutting device. [Description of the Drawings]

[0016] The following further elaborates on the specific implementation manners of the present utility model in conjunction with the accompanying drawings:

[0017] Figure 1 is a three-dimensional schematic diagram of the cutting device of the present utility model;

[0018] Figure 2 is Figure 1 a three-dimensional schematic diagram of the cutting device shown in another angle;

[0019] Figure 3 is Figure 2 the first exploded view of the cutting device shown;

[0020] Figure 4 is Figure 2 the second exploded view of the cutting device shown;

[0021] Figure 5 is Figure 2 a partial cross-sectional view of the cutting device shown.

[0022] The meanings of the reference numerals in the figure:

[0023] Cutting device 100, Tool body 1

[0024] Housing 10, Motor housing 101

[0025] Controller housing 102, Motor end cover 103

[0026] Controller end cover 104, Main housing 105

[0027] Middle hole 106, Holding part 11

[0028] Unlock button 111, Trigger 112

[0029] Motor assembly 12, First fan 121

[0030] Second fan 122, Transmission assembly 13

[0031] Shield assembly 14, Working head 15

[0032] Base plate 2, Angle adjustment mechanism 20

[0033] Depth adjustment mechanism 21, Controller assembly 3

[0034] Control board 30, EMC module assembly 31

[0035] First air duct 4, First air inlet 40

[0036] First air outlet 41, Second air duct 5

[0037] Second air inlet 50, second air outlet 51 [Specific embodiments]

[0038] The terms used in the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. For example, the terms indicating orientation or positional relationship such as "upper", "lower", "front", "rear", etc. are only based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0039] Please refer to Figures 1 to 5 Shown is a cutting device 100 according to the present utility model. The cutting device 100 can cut a workpiece to be processed (not shown). The workpiece to be processed refers to any cuttable material in the form of a block, plate or tube, such as wood, plastic, glass, metal, etc. The cutting device 100 includes a tool body 1 and a base plate 2 for supporting the tool body 1. A circular working head 15 that can be disassembled and installed is provided on the tool body 1. Specifically, the working head 15 is a saw blade. The working head 15 is used to cut the workpiece to be processed.

[0040] The base plate 2 is preferably made of a strong and durable material (such as metal). In this embodiment, it is made of magnesium alloy by molding. The base plate 2 is generally in the shape of a rectangular plate, and the base plate 2 has a flat bottom surface (not shown). The bottom surface abuts against the upper surface of the workpiece to be processed during the cutting operation.

[0041] The cutting device 100 further includes a shield assembly 14 that shields the working head 15, an angle adjustment mechanism 20 located at the front end of the base plate 2, and a depth adjustment mechanism 21 located at the rear end of the base plate 2. The shield assembly 14 can prevent the operator from accidentally touching the rotating working head 15 during the cutting process and causing injury. The angle adjustment mechanism 20 and the depth adjustment mechanism 21 are arranged perpendicular to the base plate 2. By rotating the angle adjustment mechanism 20, the required angle can be adjusted to control the cutting angle. By toggling the depth adjustment mechanism 21, the depth can be adjusted to control the cutting depth, which is practical and convenient.

[0042] The tool body 1 includes a housing 10 installed and fixed on the upper surface of the base plate 2, a motor assembly 12 housed in the housing 10, and a transmission assembly 13 connected to the axial front end of the motor assembly 12. The working head 15 is installed at the axial front end of the transmission assembly 13. After the motor assembly 12 is powered on, it operates and drives the transmission assembly 13 to rotate. Further, the transmission assembly 13 drives the working head 15 to rotate to cut the workpiece to be processed.

[0043] Further, the tool body 1 further includes a gripping portion 11 for the operator to hold. The gripping portion 11 and the housing 10 are of an integral structure. The gripping portion 11 is configured in a shape that is easy to hold. The gripping portion 11 includes an unlocking button 111 that at least partially protrudes and a trigger 112 located inside. The unlocking button 111 is used to release the locked state of the trigger 112 to activate the cutting device 100, and the trigger 112 can be pulled by the operator to start the motor assembly 12.

[0044] Please refer to Figure 3 and Figure 4 As shown, the cutting device 100 includes a controller assembly 3 electrically connected to the motor assembly 12. The controller assembly 3 is located on the side of the motor assembly 12, and both the motor assembly 12 and the controller assembly 3 are on the same side of the gripping portion 11.

[0045] Specifically, the controller assembly 3 includes a control board 30 and an EMC module assembly 31, and both the control board 30 and the EMC module assembly 31 extend along the axial direction of the motor assembly 12. The control board 30 is electrically connected to the motor assembly 12 to control the operation of the motor assembly 12, and the EMC module assembly 31 is used to prevent the cutting device 100 from interfering with surrounding devices during use.

[0046] The motor assembly 12 includes a first fan 121 and a second fan 122 installed at both axial ends thereof. Both the first fan 121 and the second fan 122 are centrifugal fans, and the centrifugal fans can suck in external air to dissipate heat from the components inside the cutting device 100.

[0047] The housing 10 includes a motor housing 101 that houses the motor assembly 12, a controller housing 102 that houses the controller assembly 3, a motor end cap 103 that covers the end of the motor housing 101, a controller end cap 104 that covers the end of the controller housing 102, and a main housing 105 connected to the motor housing 101. The main housing 105 and the motor end cap 103 are respectively located at both ends of the motor housing 101, and both the main housing 105 and the motor housing 101 are connected to the holding portion 11. The motor housing 101 and the controller housing 102 are configured as two components. In this embodiment, the motor end cap 103 and the controller end cap 104 are integrally injection-molded, which is convenient for manufacturing and easy to install. Optionally, the two can be separately formed and installed.

[0048] Further, the cutting device 100 is provided with a first air duct 4 for cooling the motor assembly 12 and a second air duct 5 for cooling the controller assembly 3. The first air duct 4 and the second air duct 5 are independently arranged. The first air duct 4 has a first air inlet 40 and a first air outlet 41 that communicate with each other. The second air duct 5 has a second air inlet 50 and a second air outlet 51 that communicate with each other. The first air inlet 40, the second air inlet 50, and the second air outlet 51 are located on the same side of the housing 10. Specifically, they are located on the rear side in the axial direction of the motor assembly 12.

[0049] Both the first air inlet 40 and the second air outlet 51 are provided on the motor end cap 103. The first air inlet 40 is located on the end face of the motor end cap 103, and the second air outlet 51 is located on the bottom face of the motor end cap 103. The second air inlet 50 is provided on the end face of the controller end cap 104. The first air outlet 41 is provided on the main housing 105, and the first air outlet 41 is located on the outer peripheral side of the transmission assembly 13. The second air outlet 51 can discharge the external air entering the second air duct 5 without affecting the normal use of the operator.

[0050] Further, an intermediate hole 106 that communicates with each other is provided between the motor housing 101 and the controller housing 102. The intermediate hole 106 and the second air inlet 50 are located at both ends of the controller assembly 3, and the intermediate hole 106 is located on the side wall of the controller housing 102 facing the motor assembly 12. External air enters the interior of the controller housing 102 from the second air inlet 50, flows through the controller assembly 3, then enters the interior of the motor housing 101 through the intermediate hole 106, and finally is discharged from the second air outlet 51. This path is the path of the second air duct 5.

[0051] After the external air enters from the first air inlet 40, it flows through the motor assembly 12 and the transmission assembly 13 and then is discharged from the first air outlet 41. This path is the path of the first air duct 4.

[0052] In this embodiment, the cutting device 100 is provided with the first air duct 4 for cooling the motor assembly 12 and the second air duct 5 for cooling the controller assembly 3. The motor housing 101 and the controller housing 102 are configured as two components, and the first air duct 4 and the second air duct 5 are independently arranged. With such an arrangement, the first air duct 4 and the second air duct 5 can respectively dissipate heat from the motor assembly 12 and the controller assembly 3, and there will be no problem of poor heat dissipation caused by the series connection of the air ducts, making the heat dissipation effect of the cutting device 100 better after the controller assembly 3 is provided; in addition, both the control board 30 and the EMC module assembly 31 extend along the axial direction of the motor assembly 12, and the overall size of the machine is more compact, which is beneficial to the miniaturization of the cutting device 100.

[0053] The present utility model is not limited to the above specific embodiments. It can be easily understood by those of ordinary skill in the art that there are many alternative solutions for the cutting device of the present utility model without departing from the principles and scopes of the present utility model. The protection scope of the present utility model shall be subject to the content of the claims.

Claims

1. A cutting device, comprising a housing, a motor assembly installed in the housing, and a controller assembly electrically connected to the motor assembly, wherein the motor assembly comprises a first fan and a second fan installed at two ends of an axial direction, and the housing comprises a motor housing for accommodating the motor assembly and a controller housing for accommodating the controller assembly; characterized in that: The cutting device is provided with a first air duct for cooling the motor component and a second air duct for cooling the controller component. The motor housing and the controller housing are constructed as two parts, and the first air duct and the second air duct are independently arranged.

2. The cutting device according to claim 1, characterized in that: The first air duct has a first air inlet and a first air outlet that are interconnected, the second air duct has a second air inlet and a second air outlet that are interconnected, and the first air inlet, the second air inlet and the second air outlet are located on the same side of the shell.

3. The cutting device according to claim 2, characterized in that: The shell includes a motor end cover covering the end of the motor shell and a controller end cover covering the end of the controller shell, the second air inlet is opened on the controller end cover, and the first air inlet and the second air outlet are both opened on the motor end cover.

4. The cutting device according to claim 3, characterized in that: An intermediate hole that is interconnected is provided between the motor housing and the controller housing. External air enters the interior of the controller housing from the second air inlet, flows through the controller component, enters the interior of the motor housing through the intermediate hole, and is finally discharged from the second air outlet.

5. The cutting device according to claim 4, characterized in that: The middle hole and the second air inlet are located at two ends of the controller component, and the middle hole is located on a side wall of the controller housing facing the motor component.

6. The cutting device according to claim 3, characterized in that: The housing comprises a main housing connected to the motor housing, the main housing and the motor end cover are located at two ends of the motor housing, and the first air outlet is opened in the main housing.

7. The cutting device according to claim 3, characterized in that: The motor end cover and the controller end cover are integrally injection molded.

8. The cutting device according to claim 1, characterized in that: The controller assembly includes a control board and an EMC module assembly, and both the control board and the EMC module assembly extend along the axis direction of the motor assembly.

9. The cutting device according to claim 6, characterized in that: The cutting device comprises a gripping portion connected to the motor housing and the main housing, the gripping portion and the housing are integrally constructed, and the motor assembly and the controller assembly are located on the same side of the gripping portion.

10. The cutting device according to claim 9, characterized in that: The controller housing is connected to the grip portion.

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