CN214815348U - Electric circular saw - Google Patents
Electric circular saw Download PDFInfo
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- CN214815348U CN214815348U CN202120627033.4U CN202120627033U CN214815348U CN 214815348 U CN214815348 U CN 214815348U CN 202120627033 U CN202120627033 U CN 202120627033U CN 214815348 U CN214815348 U CN 214815348U
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- circular saw
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Abstract
The utility model discloses an electric circular saw. The method comprises the following steps: the speed regulation module comprises a switch and an indicator light electrically connected with the control unit to control the indicator light to display different working states, one end of the switch is connected with a pull-up power supply through a pull-up resistor, the other end of the switch is grounded, the connection point of the switch and the pull-up resistor is connected with the control unit, the starting switch sends a trigger signal to the control unit, and the control unit controls the display state of the indicator light and the corresponding output rotating speed of the motor respectively. The utility model discloses an adopt electronic type switch to realize motor stepping speed governing to the instruction that corresponds can practice thrift the electric energy to different operating modes selection different rotational speeds.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to an electric circular saw, in particular to electric circular saw with rotational speed stepping and show.
[ background of the invention ]
The current electric circular saw is open loop control, and the rotational speed can change along with the change of load, influences user operation comfort level, and adds man-hour to different loads, all carries out work with the same rotational speed, for example when the circular saw cuts the panel of different thickness, and motor rotational speed is the same, leads to utilizing big power to thin panel cutting, causes the energy extravagant, and the time of endurance of battery shortens.
Therefore, it is necessary to design an electric circular saw which is comfortable to operate and energy-saving to solve the above problems.
[ Utility model ] content
To the deficiency of the prior art, an object of the utility model is to provide an operate comfortable and energy-conserving electric circular saw.
The utility model provides a prior art problem can adopt following technical scheme: an electric circular saw for providing different cutting speeds on different materials, comprising: the speed regulation module comprises a switch and an indicator light electrically connected with the control unit to control the indicator light to display different working states, one end of the switch is connected with a pull-up power supply through a pull-up resistor, the other end of the switch is grounded, the switch is connected with the control unit through a connection point of the pull-up resistor, the switch is started and triggers a signal to the control unit, and the control unit controls the display state of the indicator light and the corresponding output rotating speed of the motor respectively.
The further improvement scheme is as follows: the speed adjusting module comprises a high-speed mode and a low-speed mode, two display windows are arranged on the shell, the display windows respectively contain indicator lights, and the indicator lights are a high-speed indicator light for displaying in the high-speed mode and a low-speed indicator light for displaying in the low-speed mode.
The further improvement scheme is as follows: the indicating lamp is a light emitting diode, the positive electrode of the indicating lamp is connected with the control unit, the negative electrode of the indicating lamp is connected with the ground, and the indicating lamp is lightened when receiving the high-level signal sent by the control unit.
The further improvement scheme is as follows: the switch is a key switch, the key switch is pressed, the control unit detects a low level signal, the control unit controls the motor to be in a low-speed mode, and controls the low-speed indicator lamp to be turned on; and the key switch is pressed again, the control unit detects a low level signal again, and the control unit controls the motor to be in a high-speed mode and controls the high-speed indicator lamp to be lightened.
The further improvement scheme is as follows: the motor is connected with the control unit through a driving module, and the control unit controls the driving module to drive the motor according to the state of the motor speed adjusting module.
The further improvement scheme is as follows: the control unit stores a first duty ratio corresponding to a low-speed mode and a second duty ratio corresponding to a high-speed mode, and the first duty ratio is smaller than the second duty ratio.
The further improvement scheme is as follows: the electric circular saw comprises a trigger, when the motor speed adjusting module is in a low-speed mode, the trigger is operated, and the control unit controls the motor at a first duty ratio; when the motor speed adjusting module is in a high-speed mode, the trigger is operated, and the control unit controls the motor at a second duty ratio.
The further improvement scheme is as follows: when the trigger is released, the control unit controls the motor to stop rotating and controls the indicator lamp to be turned off after preset time.
Compared with the prior art, the utility model discloses following beneficial effect has: the electric circular saw is provided with a speed adjusting module, the speed adjusting module comprises a switch and an indicator light, one end of the switch is connected with a pull-up power supply through a pull-up resistor, the other end of the switch is grounded, a connection point of the switch and the pull-up resistor is connected with a control unit, the switch is started, a signal is triggered to the control unit, and the control unit controls the indicator light to display the state and corresponds to the output rotating speed of the motor. The electronic switch is adopted to realize the stepping speed regulation of the motor, corresponding indication is carried out, different rotating speeds can be selected for different loads, and electric energy is saved.
[ 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 structural view of an electric circular saw according to the present invention;
FIG. 2 is an enlarged view of the speed adjustment module of the electric circular saw of the present invention;
fig. 3 is a circuit diagram of an electric circular saw according to an embodiment of the present invention.
The meaning of the reference symbols in the figures:
100. electric circular saw 1, motor 2, motor housing 3, handle 4, battery 5, speed adjusting module 51, switch 52, button 53, high-speed indicator 54, low-speed indicator 6, control unit 7, drive module 8, zero-crossing detection circuit
[ detailed description ] embodiments
The present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Please refer to fig. 1, fig. 2 and fig. 3, which are the views of the present invention, and the present invention relates to an electric circular saw 100, which comprises a housing, a motor 1 housed in the housing, a transmission assembly (not shown) for transmitting power, a circuit board (not shown), and a cutting unit connected to the housing, wherein the housing comprises a motor housing 2 and a handle 3, the motor housing 2 houses the motor 1 and the transmission assembly, one end of the handle 3 is connected to the motor housing 2 and is close to one end of the motor housing 2, a trigger is disposed on the other end of the handle 3, a battery 4 is connected to the other end of the handle 3 and is provided with a circuit board, the handle 3 is provided with a speed adjusting module 5 for controlling the operating speed of the motor at the circuit board, and the speed adjusting module 5 comprises a switch 51 and a plurality of status indicator lights for displaying different operating speeds of the motor. The circuit board is provided with a control unit 6, the motor 1, the switch 51 and the indicator light are respectively connected to the control unit 6, the control unit 6 controls the motor 1 to switch in different rotating speed modes according to the speed adjusting module 5, and the indicator light is correspondingly turned on to correspondingly display the current state of the motor 1.
The speed adjusting module 5 comprises a high-speed mode and a low-speed mode, the shell is provided with a button 52 and two display windows corresponding to the switch 51, the display windows respectively accommodate indicator lights, the indicator lights are a high-speed indicator light 53 for displaying in the high-speed mode and a low-speed indicator light 54 for displaying in the low-speed mode, and the shell is further provided with marks corresponding to the indicator lights, in the embodiment, an H-shaped mark is arranged beside the high-speed indicator light 53, an L-shaped mark is arranged beside the low-speed indicator light 54, and of course, other mark modes are also available.
As shown in fig. 3, which is a circuit diagram of an embodiment of the present invention, the motor is connected to the control unit 6 through a driving module 7, the driving module 7 includes an upper arm and a lower arm, the upper arm includes switching tubes Q1, Q2, and Q3, the lower arm includes switching tubes Q4, Q5, and Q6, and each switching tube is connected in parallel with diodes D1 to D6 in a reverse direction; the motor 1 is a brushless motor, the brushless motor includes a first phase winding U, a second phase winding V, and a third phase winding W, each phase winding is connected end to end, and of course, the windings of the motor may also be in star connection. The control unit 6 is connected with the motor 1 through a zero-crossing detection circuit 8 and is used for detecting the position of the motor 1 and the motor speed. One end of the switch 51 is connected with a pull-up power supply through a pull-up resistor R1, the other end of the switch is grounded, a connection point a of the switch 51 and the pull-up resistor R1 is connected with the control unit 6, the switch 51 is started to send a trigger signal to the control unit 6, and the control unit 6 respectively controls the motor 1 to switch in different rotating speed modes and correspondingly switches on the indicator lamps to correspondingly display the current state of the motor. The indicating lamp is a light emitting diode, the positive pole of the indicating lamp is connected with the control unit 6, the negative pole of the indicating lamp is connected with the ground, and the indicating lamp is lightened when receiving the high level signal sent by the control unit 6.
The control unit 6 stores a first duty ratio corresponding to the low-speed mode and a second duty ratio corresponding to the high-speed mode, and the first duty ratio is smaller than the second duty ratio. The switch 51 is a key switch, that is, the switch 51 is pressed, the switch 51 is closed, and the control unit 6 receives a low level signal; the switch 51 is not pressed, the switch 51 is turned off, and the control unit 6 receives a high level signal. The control unit 6 has a memory function, that is, the key switch 51 is pressed, the control unit 6 detects a low level signal, the control unit 6 controls the motor 1 to be in an initial state, that is, in a low speed mode, the control unit 6 controls the low speed indicator 54 to be lit, the trigger is operated, and the control unit 6 controls the motor 1 to operate the motor 1 at a constant speed at a first duty ratio; the key switch 51 is pressed again, the control unit 6 detects a low level signal again, the control unit 6 controls the motor 1 to be in a high speed mode, the control unit 6 controls the high speed indicator lamp 53 to be turned on, the trigger is operated, and the control unit 6 controls the motor 1 to operate the motor 1 at a constant speed with a second duty ratio. When the low level signal is detected again, the control unit 6 controls the motor 1 to be in the low speed mode. Of course, the initial state may also be a high speed mode. When the trigger is released, the control unit 6 controls the motor 1 to stop rotating, and controls the indicator lamp to be turned off after a preset time, wherein the preset time value is 3 seconds. Namely, when the thin plate is cut, a low-speed mode can be selected, and the control unit 6 controls the motor 1 to operate at a low rotating speed and a constant speed, so that the effective cutting can be met, and the waste of electric energy can not be caused.
The utility model discloses electric circular saw is equipped with speed regulation module 5, and speed regulation module 5 includes switch 51 and pilot lamp, and switch 51 one end connects pull-up power through pull-up resistance R1, other end ground connection, switch 51 and pull-up resistance R1's tie point connection control unit 6, starting switch 51 and triggering signal to the control unit 6, and the control unit 6 controls pilot lamp display state respectively and corresponds the output rotational speed with motor 1. The electronic switch is adopted to realize the stepping speed regulation of the motor, corresponding indication is carried out, different rotating speeds can be selected for different loads, and electric energy is saved.
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 electric circular saw 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 (8)
1. An electric circular saw for providing different cutting speeds on different materials, comprising: the motor control device comprises a shell, a motor accommodated in the shell and a control unit connected with the motor and controlling the motor to operate; the method is characterized in that: the shell is provided with a speed adjusting module, the speed adjusting module comprises a switch and an indicator light electrically connected with the control unit so as to control the indicator light to display different working states, one end of the switch is connected with a pull-up power supply through a pull-up resistor, the other end of the switch is grounded, a connection point of the switch and the pull-up resistor is connected with the control unit, the switch is started and triggers a signal to the control unit, and the control unit respectively controls the display state of the indicator light and the corresponding output rotating speed of the motor.
2. The electric circular saw of claim 1, wherein: the speed adjusting module comprises a high-speed mode and a low-speed mode, two display windows are arranged on the shell, the display windows respectively contain indicator lights, and the indicator lights are a high-speed indicator light for displaying in the high-speed mode and a low-speed indicator light for displaying in the low-speed mode.
3. The electric circular saw of claim 2, wherein: the indicating lamp is a light emitting diode, the positive electrode of the indicating lamp is connected with the control unit, the negative electrode of the indicating lamp is connected with the ground, and the indicating lamp is lightened when receiving the high-level signal sent by the control unit.
4. The electric circular saw of claim 3, wherein: the switch is a key switch, the key switch is pressed, the control unit detects a low level signal, the control unit controls the motor to be in a low-speed mode, and controls the low-speed indicator lamp to be turned on; and the key switch is pressed again, the control unit detects a low level signal again, and the control unit controls the motor to be in a high-speed mode and controls the high-speed indicator lamp to be lightened.
5. The electric circular saw of claim 1, wherein: the motor is connected with the control unit through a driving module, and the control unit controls the driving module to drive the motor according to the state of the motor speed adjusting module.
6. The electric circular saw of claim 5, wherein: the control unit stores a first duty ratio corresponding to a low-speed mode and a second duty ratio corresponding to a high-speed mode, and the first duty ratio is smaller than the second duty ratio.
7. The electric circular saw of claim 6, wherein: the electric circular saw comprises a trigger, when the motor speed adjusting module is in a low-speed mode, the trigger is operated, and the control unit controls the motor at a first duty ratio; when the motor speed adjusting module is in a high-speed mode, the trigger is operated, and the control unit controls the motor at a second duty ratio.
8. The electric circular saw of claim 7, wherein: when the trigger is released, the control unit controls the motor to stop rotating and controls the indicator lamp to be turned off after preset time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120627033.4U CN214815348U (en) | 2021-03-26 | 2021-03-26 | Electric circular saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120627033.4U CN214815348U (en) | 2021-03-26 | 2021-03-26 | Electric circular saw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214815348U true CN214815348U (en) | 2021-11-23 |
Family
ID=78760341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120627033.4U Active CN214815348U (en) | 2021-03-26 | 2021-03-26 | Electric circular saw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214815348U (en) |
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2021
- 2021-03-26 CN CN202120627033.4U patent/CN214815348U/en active Active
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