Direct-current brushless integrated switch

Abstract

The utility model relates to the technical field of electric tool switches, and specifically discloses a DC brushless integrated switch. The utility model relates to a speed regulation device which comprises a shell, an actuating mechanism, a reversing mechanism, a speed regulation module and a power module, the actuating mechanism, the reversing mechanism, the speed regulation module and the power module are arranged in the shell, the speed regulation module comprises a signal PCB, the power module comprises a power PCB, the power PCB and the signal PCB are oppositely arranged, a conductive elastic part is arranged between the power PCB and the signal PCB, and the power PCB and the signal PCB are electrically connected through the conductive elastic part. And a mounting piece for mounting the conductive elastic piece is arranged in the shell. According to the utility model, the independent power PCB and signal PCB are arranged, so that the influence of heating of the power module on the speed regulation module is avoided, the service life of the switch is prolonged, the power PCB and the signal PCB are electrically connected through the conductive elastic piece, welding is not needed, the assembly process is simpler and more efficient, and the conductive stability of elastic contact is better.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tool switches, and specifically discloses a direct current brushless integrated switch. Background Art

[0002] At present, most of the brushless DC integrated switches used in power tools on the market concentrate the functions of related electronic parts on one PCBA, and the power module and speed regulation module of the switch are all set on the same PCB.

[0003] For example, the DC brushless integrated intelligent speed control switch disclosed in CN114188171A has a switch in which the power module and the speed control module are integrated on a PCB. This structure will inevitably transfer the heat of the power module to the speed control module when the power module is heated. The copper foil of the speed control module is coated with grease, which protects the copper foil from being easily worn when the brush slides on the copper foil. However, the heat generated by the power module causes the grease to volatilize and become viscous due to heat. The grease loses or reduces its lubricating effect on the brush and the copper foil. The brush slides on the copper foil and wears, resulting in poor contact between the brush and the copper foil, thereby affecting the service life of the switch. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a direct current brushless integrated switch.

[0005] The utility model discloses a DC brushless integrated switch, which adopts the following technical solution:

[0006] A DC brushless integrated switch comprises a housing and an actuating mechanism, a commutation mechanism, a speed regulating module and a power module arranged in the housing, wherein the speed regulating module comprises a signal PCB board, the power module comprises a power PCB board, the power PCB board and the signal PCB board are arranged opposite to each other, a conductive elastic member is arranged between the power PCB board and the signal PCB board, the conductive elastic member electrically connects the power PCB board and the signal PCB board, and a mounting member for mounting the conductive elastic member is arranged in the housing.

[0007] Preferably, the conductive elastic member is a conductive spring, and two ends of the conductive spring are in elastic contact with the power PCB and the signal PCB respectively.

[0008] Preferably, the mounting member is a base, a spring seat is provided on the base, a connecting through hole is provided on the spring seat, and the conductive spring is arranged in the connecting through hole.

[0009] Preferably, the shell includes a cover shell and a heat dissipation shell, the power PCB board is arranged in the heat dissipation shell, the signal PCB board is arranged in the cover shell, and the cover shell and the heat dissipation shell fix the base inside; the heat dissipation shell is provided with a closed part and an open part, and the closed part is buckled with the cover shell to form a closed area.

[0010] Preferably, the base and the cover shell are hung together, the heat dissipation shell and the cover shell are hung together, and the cover shell is provided with a connecting arm for buckling with the power PCB board.

[0011] Preferably, the power module comprises a power switch disposed on the power PCB, and the power switch is arranged in an open portion of the heat dissipation shell.

[0012] Preferably, the speed regulating mechanism comprises a brush and a copper foil arranged on the signal PCB board, and the actuating mechanism drives the brush to move on the copper foil of the signal PCB board to realize the speed regulating function.

[0013] Preferably, the actuating mechanism comprises a trigger and a movable frame, and the brush is arranged on the movable frame. As the actuating mechanism moves, the brush moves on the copper foil of the signal PCB board to realize the speed regulation function.

[0014] Preferably, the reversing mechanism comprises a swing button and a reversing spring, wherein the reversing spring is arranged on the swing button and contacts or disconnects with the copper foil on the power PCB board as the swing button rotates, thereby realizing the reversing function of the motor.

[0015] Preferably, the mounting member has a cavity on the front portion, and a spring fixing seat of a pendulum button and a brush fixing seat of a movable frame are arranged in the cavity on the front portion of the mounting member, the signal PCB board covers the spring seat on the front portion of the base, and the power PCB board covers the reverse side of the spring seat.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] The utility model separates the speed regulating module from the power module and sets independent power PCB and signal PCB, thereby avoiding the influence of the heat of the power module on the speed regulating module and improving the service life of the switch. Moreover, the power PCB and the signal PCB are electrically connected by providing a conductive elastic member, which not only eliminates the need for welding, but also makes the assembly process simpler and more efficient. In addition, the conductive stability of the elastic contact is better, thus avoiding the problem of poor contact caused by welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the structure of the brushless DC integrated switch after being disassembled in this embodiment;

[0019] Figure 2 is a schematic structural diagram of the assembled DC brushless integrated switch of this embodiment;

[0020] Figure 3 This is a schematic structural diagram of the brushless DC integrated switch of this embodiment after the heat dissipation shell and the cover shell are removed;

[0021] Figure 4 Schematic diagram of electrical connection of the conductive spring of the brushless DC integrated switch of this embodiment;

[0022] Figure 5 is a schematic diagram of a closed portion and an open portion of a brushless DC integrated switch of this embodiment;

[0023] Figure 6 1 is a schematic diagram of the structure of the commutation mechanism of the brushless DC integrated switch of the present embodiment;

[0024] Figure 7 The second structural diagram of the commutation mechanism of the brushless DC integrated switch of this embodiment;

[0025] Figure 8 3 is a schematic diagram of the structure of the commutation mechanism of the brushless DC integrated switch of the present embodiment;

[0026] Fig. 9 is a front structural schematic diagram of a base of a brushless DC integrated switch of this embodiment;

[0027] Fig.10 is a schematic diagram of the back structure of the base of the brushless DC integrated switch of this embodiment;

[0028] Fig.11 It is a structural schematic diagram of the cover shell of the brushless DC integrated switch of this embodiment;

[0029] Fig.12 It is a structural schematic diagram of the heat dissipation shell of the brushless DC integrated switch of this embodiment;

[0030] Fig.13 It is a schematic diagram of the cover shell and the power PCB board of the brushless DC integrated switch of this embodiment being buckled together.

[0031] Description of Figure Numbers:

[0032] 1. Cover shell; 101. First hook; 102. Second hook; 103. Connecting arm; 2. Heat dissipation shell; 21. Enclosed portion; 22. Open portion; 23. Second hook; 3. Base; 31. Spring seat; 311. Connecting through hole; 32. Forward sealing groove; 321. First sealing gasket; 33. Reverse sealing groove; 331. Second sealing gasket; 34. Shrapnel fixing seat; 35. Brush fixing seat; 36. First hook; 4. Signal PCB board; 5. Power PCB board; 6. Conductive spring; 7. Trigger; 8. Movable frame; 9. Reset spring; 10. Brush; 11. Swing button; 12. Reversing shrapnel; 13. Power switch. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] A brushless DC integrated switch, referring to Figure 1-4 , which includes a housing and an actuating mechanism, a reversing mechanism, a speed regulating module and a power module arranged in the housing. The speed regulating module includes a signal PCB board 4, and the power module includes a power PCB board 5. The power PCB board 5 and the signal PCB board 4 are arranged relative to each other, specifically, the power PCB board 5 and the signal PCB board 4 are arranged in parallel. A conductive elastic member is arranged between the power PCB board 5 and the signal PCB board 4, and the conductive elastic member electrically connects the power PCB board 5 and the signal PCB board 4. A mounting member for mounting the conductive elastic member is also arranged in the housing. By separating the speed regulating module from the power module to form an independent power PCB board 5 and signal PCB board 4, the influence of the heat of the power module on the speed regulating module is avoided, and the service life of the switch is improved. In addition, the power PCB board 5 and the signal PCB board 4 are electrically connected by a conductive elastic member, which not only does not require welding, but also makes the assembly process simpler and more efficient, and the conductive stability of the elastic contact is better, avoiding the problem of poor contact caused by welding quality.

[0035] Specifically, in the present embodiment, the actuating mechanism includes a trigger 7, a movable frame 8 and a reset spring 9; the speed regulating mechanism includes a brush 10 arranged on the movable frame 8 and a copper foil arranged on the signal PCB board 4. As the actuating mechanism moves, the brush 10 moves on the copper foil of the signal PCB board 4, thereby realizing the speed regulating function; the reversing mechanism includes a pendulum 11, a reversing spring 12 and a copper foil arranged on the power PCB board 5. The reversing spring 12 is fixed on the pendulum 11, and contacts or disconnects with the copper foil on the power PCB board 5 as the pendulum 11 rotates, thereby realizing the reversing function of the motor.

[0036] In this embodiment, the housing includes a cover shell 1 and a heat dissipation shell 2, a power PCB board 5 is arranged in the heat dissipation shell 2, and a signal PCB board 4 is arranged in the cover shell 1. Figure 5 The heat dissipation shell 2 is provided with a closed portion 21 and an open portion 22, and the closed portion 21 is buckled with the cover shell 1 to form a closed area. The power module includes a power switch 13 arranged on the power PCB board 5, and the power switch 13 is arranged in the open portion 22 of the heat dissipation shell 2, and one side of the open portion 22 is exposed to the air. The power switch 13 is connected to the wiring module, and the heat generated by the power switch 13 is transferred to the heat dissipation shell 2 and dissipated by the heat dissipation shell 2. In this way, the generated heat is not easily conducted to the copper foil of the speed regulating module in the closed portion 21, and the heat volatilization degree of the grease on the copper foil is effectively controlled.

[0037] In this embodiment, the mounting member is a base 3, and the cover shell 1 and the heat dissipation shell 2 fix the base 3 inside. Figure 6-10 The base 3 has a cavity, a spring seat 31 and a forward sealing groove 32 on the front part, and a reverse sealing groove 33 is provided on the reverse part of the base 3. The forward sealing groove 32 is arranged around the periphery of the spring seat 31 and the cavity, and a first sealing gasket 321 is arranged in the forward sealing groove 32; and a second sealing gasket 331 is arranged in the reverse sealing groove 33. The signal PCB board 4 covers the spring seat 31 on the front of the base 3, and the power PCB board 5 covers the reverse side of the spring seat 31. The spring seat 31 is provided with a connecting through hole 311, and the conductive elastic member is preferably a conductive spring 6, which is arranged in the connecting through hole 311, and the two ends of the conductive spring 6 are elastically contacted with the power PCB board 5 and the signal PCB board 4 respectively. The spring piece fixing seat 34 of the swing button and the brush fixing seat 35 of the movable frame are arranged in the cavity on the front of the base 3. Of course, in other embodiments, the mounting member can be an integrally formed component of the cover shell or the heat dissipation shell, and the independent base is used in this embodiment, which is conducive to convenient assembly.

[0038] In this embodiment, refer to Figure 10-13 The base 3 is provided with a first hook 36, the cover shell is provided with a first hook 101, the base 3 and the cover shell 1 are mutually hung by the first hook 36 and the first hook 101, and the first sealing gasket 321 is fixed by the base 3 and the cover shell 1; the cover shell 1 is provided with a second hook 102, the heat dissipation shell 2 is provided with a second hook 23, the heat dissipation shell 2 and the cover shell 1 are mutually hung by the second hook 102 and the second hook 23, and the second sealing gasket 331 is fixed by the heat dissipation shell 2 and the cover shell 1; the cover shell 1 is also provided with a connecting arm 103 for buckling with the power PCB board 5. During assembly, the base 3 and the cover shell 1 are firstly hung by the first hook 36 and the first hook 101, and then the power PCB board 5 is buckled and connected with the connecting arm 103 on the cover shell 1, and finally the heat dissipation shell 2 and the cover shell 1 are mutually hung by the second hook 102 and the second hook 23, and the assembly process is simple and the assembly efficiency is higher.

[0039] The technical solution provided by the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A brushless DC integrated switch, comprising a housing and an actuating mechanism, a commutating mechanism, a speed regulating module and a power module arranged in the housing, characterized in that: The speed regulation module includes a signal PCB board, and the power module includes a power PCB board. The power PCB board and the signal PCB board are arranged opposite to each other. A conductive elastic member is provided between the power PCB board and the signal PCB board. The conductive elastic member electrically connects the power PCB board and the signal PCB board. A mounting member for mounting the conductive elastic member is provided in the housing.

2. A brushless DC integrated switch according to claim 1, characterized in that: The conductive elastic member is a conductive spring, and two ends of the conductive spring are in elastic contact with the power PCB and the signal PCB respectively.

3. A brushless DC integrated switch according to claim 2, characterized in that: The mounting member is a base, a spring seat is provided on the base, a connecting through hole is provided on the spring seat, and the conductive spring is arranged in the connecting through hole.

4. A brushless DC integrated switch according to claim 3, characterized in that: The housing comprises a cover shell and a heat dissipation shell, the power PCB is arranged in the heat dissipation shell, the signal PCB is arranged in the cover shell, and the cover shell and the heat dissipation shell fix the base inside; a closed part and an open part are arranged on the heat dissipation shell, and the closed part is buckled with the cover shell to form a closed area.

5. A brushless DC integrated switch according to claim 4, characterized in that: The base and the cover shell are hung together, the heat dissipation shell and the cover shell are hung together, and the cover shell is provided with a connecting arm for buckling with the power PCB board.

6. A brushless DC integrated switch according to claim 4, characterized in that: The power module includes a power switch disposed on the power PCB board, and the power switch is arranged in the open portion of the heat dissipation shell.

7. A brushless DC integrated switch according to claim 1, characterized in that: The speed regulating mechanism comprises a brush and a copper foil arranged on a signal PCB board, and the actuating mechanism drives the brush to move on the copper foil of the signal PCB board to realize the speed regulating function.

8. A brushless DC integrated switch according to claim 7, characterized in that: The actuating mechanism comprises a trigger and a movable frame, and the brush is arranged on the movable frame. As the actuating mechanism moves, the brush moves on the copper foil of the signal PCB board to realize the speed regulation function.

9. A brushless DC integrated switch according to claim 8, characterized in that: The reversing mechanism comprises a swing button and a reversing spring. The reversing spring is arranged on the swing button and contacts or disconnects with the copper foil on the power PCB board as the swing button rotates, thereby realizing the reversing function of the motor.

10. A brushless DC integrated switch according to claim 9, characterized in that: The mounting piece has a cavity on the front part, in which a spring fixing seat of a swing button and a brush fixing seat of a movable frame are arranged, the signal PCB board covers the spring seat on the front part of the mounting piece, and the power PCB board covers the reverse side of the spring seat.

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