Electric drill control module with rotating speed detection function
By adding a Hall plate to the main control board of the electric drill control module and matching it with the brushless motor, combined with conventional brushless motors and Hall plates, the problem of high cost of electric drill speed detection function is solved, and low-cost speed is achieved Inspection and improvement of assembly efficiency.
Patent Information
- Application Number
- CN202421542340.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-01-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing electric drill control module needs to use expensive Hall function motors when implementing speed detection, resulting in an increase in the price of electric drills, a decrease in market acceptance, and affecting competitiveness.
Design a drill control module with speed detection. By adding a Hall board to the main control board and designing its structure to be able to be matched and connected to the rear end of the brushless motor, combined with a conventional brushless motor and a common Hall board, it can achieve External speed detection of shell reduces manufacturing costs.
Without changing the original drill structure, the detection of the speed of the brushless motor is achieved, reducing the manufacturing cost of the drill and improving the assembly efficiency.
Smart Images
Figure CN222359320U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of switch control, and in particular relates to an electric drill control module with rotation speed detection. Background Art
[0002] Speed detection is used in many electrical equipment, but it is rarely used in power tools. As an electric drilling tool, the speed of the electric drill will directly affect the drilling effect, so it is necessary to detect the speed of the electric drill.
[0003] Conventional electric drill control modules need to use motors with Hall function to detect rotation speed, but such motors are expensive, which significantly increases the overall price of electric drills, reduces market acceptance, and affects the market competitiveness of products.
[0004] Therefore, it is necessary to improve the existing technology and reduce the manufacturing cost while achieving the technical goal of electric drill speed detection. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide an electric drill control module with speed detection, so as to realize the outer shell speed detection of the common brushless motor, thereby reducing the manufacturing cost of the electric drill with speed detection function.
[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: an electric drill control module with speed detection, including a speed control switch and a main control board, the power input end of the speed control switch is connected to a battery clamp, the control end of the speed control switch is connected to the main control board, and the main control board is also connected to a Hall plate, the Hall plate is provided with a through hole for matching the boss of the rear end cover of the motor and a plurality of positioning holes distributed around the through hole, the positioning hole matches the bolt hole at the rear end of the electric drill motor, and a number of Hall sensors are arranged around the through hole of the Hall plate.
[0007] As a preferred solution, an annular metal dustproof frame is connected to the main control board, a control chip is arranged inside the dustproof frame, the control chip is connected to the main control board, the top of the control chip is covered with a silicone layer, the top of the dustproof frame is covered with a metal top cover, the top cover is tightly attached to the silicone layer, the top cover seals the top of the dustproof frame, and the bottom of the dustproof frame is sealed and attached to the surface of the main control board.
[0008] As a preferred solution, the silica gel layer is adapted to the inner cavity of the dustproof frame.
[0009] As a preferred solution, a reversing key panel is also connected to the main control panel.
[0010] The beneficial effect of the utility model is as follows: the utility model adds a connecting Hall plate on the main control board, and designs the structure of the Hall plate to be matched and connected with the rear end of the brushless motor, so that the function of detecting the speed of the brushless motor of the electric drill is realized without changing the original structure of the electric drill. Since a conventional brushless motor is adopted, the cost is lower than that of a brushless motor with a built-in Hall, and the price of an ordinary Hall plate is also relatively cheap. The combination of the two can realize the function of detecting the speed outside the shell of the ordinary brushless motor, and reduce the manufacturing cost of the electric drill with the speed detection function.
[0011] The utility model manufactures the electric drill control module with rotation speed detection in a modular manner, thereby improving the assembly efficiency of the electric drill control module with rotation speed detection in the electric drill general assembly process at a later stage. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:
[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0014] Figure 2 This is a partial exploded view of the main control panel;
[0015] Figure 1 and Figure 2 Middle: 1. Speed control switch, 2. Main control board, 3. Battery clip, 4. Hall plate, 5. Via hole, 6. Positioning hole, 7. Hall sensor, 8. Dustproof frame, 9. Control chip, 10. Silicone layer, 11. Top cover, 12. Reversing key board. DETAILED DESCRIPTION
[0016] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings.
[0017] like Figure 1 The electric drill control module with speed detection shown in the figure includes a speed switch 1 and a main control board 2. The power input end of the speed switch 1 is connected to a battery clamp 3, which is used to connect a battery pack. The control end of the speed switch 1 is connected to the main control board 2 to send a control signal to the main control board. The main control board 2 is also connected to a Hall plate 4, which is provided with a through hole 5 for matching the boss of the rear end cover of the motor and a plurality of positioning holes 6 distributed around the through hole 5. The positioning hole 6 matches the bolt hole at the rear end of the electric drill motor. Several Hall sensors 7 are arranged around the through hole 5 of the Hall plate 4.
[0018] like Figure 2As shown, in this embodiment, a ring-shaped metal dustproof frame 8 is also connected to the main control board 2, and a control chip 9 is arranged inside the dustproof frame 8. The control chip 9 is connected to the main control board 2. The top of the control chip 9 is covered with a silicone layer 10, and the top of the dustproof frame 8 is covered with a metal top cover 11. The top cover 11 is in close contact with the silicone layer 10. The top cover 11 seals the top of the dustproof frame 8, and the bottom of the dustproof frame 8 is sealed and attached to the surface of the main control board 2. The dustproof frame 8 surrounds the control chip 9 to prevent dust or humid air from affecting the working stability of the control chip 9. The silicone layer 10 not only has a sealing effect, but also plays a heat-conducting role. The silicone layer 10 transfers the heat generated by the control chip 9 to the top cover 11, and the metal top cover 11 dissipates the heat. In this way, the control chip 9 can be kept in a good working environment, and the working temperature of the control chip 9 can be effectively reduced, thereby improving the working stability and service life of the control chip 9.
[0019] In order to effectively prevent dust, the silicone layer 10 in this embodiment is adapted to the internal cavity of the dustproof frame 8. The silicone layer 10 is preferably injected into the dustproof frame 8 by means of glue injection, so as to achieve better dustproof and waterproof effects and thermal conductivity and heat dissipation effects.
[0020] The main control board 2 is also connected to a reversing key board 12. The reversing key board 12 is used to send a reversing signal to the main control board 2.
[0021] In this embodiment, a printed circuit is provided on the main control board 2 for electrical connection between the speed regulating switch 1 , the Hall sensor 7 , the reversing key board 12 and the control chip 9 .
[0022] The working process of the utility model is: when the electric drill control module with speed detection described in the utility model is applied to the electric drill, the speed regulating switch 1 and the main control board 2 are respectively assembled according to the design of the electric drill shell, and then the Hall plate 4 is connected to the rear end of the brushless motor of the electric drill. When the installation position of the reversing key board 12 is provided on the electric drill shell, the reversing key board 12 is installed on the electric drill shell.
[0023] By adding a Hall plate 4 to the main control board 2 and designing the structure of the Hall plate 4 to be able to match and connect with the rear end of the brushless motor, the function of detecting the speed of the brushless motor of the electric drill can be achieved without changing the original structure of the electric drill. Since a conventional brushless motor is used, the cost is lower than that of a brushless motor with a built-in Hall, and the price of an ordinary Hall plate is also relatively cheap. By combining the two, the function of detecting the outer shell speed of the ordinary brushless motor can be realized, and the manufacturing cost of the electric drill with a speed detection function can be reduced.
[0024] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.
Claims
1. An electric drill control module with speed detection, comprising a speed regulating switch (1) and a main control board (2), wherein the power input end of the speed regulating switch (1) is connected to a battery clamp (3), and the control end of the speed regulating switch (1) is connected to the main control board (2), characterized in that: The main control board (2) is also connected to a Hall plate (4), the Hall plate (4) is provided with a through hole (5) for matching with a boss of a rear end cover of the motor and a plurality of positioning holes (6) distributed around the through hole (5), the positioning hole (6) matches with a bolt hole at the rear end of the electric drill motor, and a plurality of Hall sensors (7) are arranged around the through hole (5) of the Hall plate (4).
2. The electric drill control module with speed detection according to claim 1, characterized in that: The main control board (2) is connected to an annular metal dustproof frame (8), a control chip (9) is arranged inside the dustproof frame (8), the control chip (9) is connected to the main control board (2), the top of the control chip (9) is covered with a silicone layer (10), the top of the dustproof frame (8) is covered with a metal top cover (11), the top cover (11) is tightly attached to the silicone layer (10), the top cover (11) seals the top of the dustproof frame (8), and the bottom of the dustproof frame (8) is sealed and attached to the surface of the main control board (2).
3. The electric drill control module with rotation speed detection according to claim 2, characterized in that: The silica gel layer (10) is adapted to the inner cavity of the dustproof frame (8).
4. The electric drill control module with rotation speed detection according to claim 1, characterized in that: The main control panel (2) is also connected to a reversing key panel (12).