Stepless speed change glue gun and operation method

Abstract

The invention discloses an infinitely variable speed glue gun and an operation method, and the infinitely variable speed glue gun comprises a motor driving module which is used for receiving a control signal of a control chip and driving a motor of the infinitely variable speed glue gun to work; the load detection module is used for detecting the viscosity of glue discharged from the glue gun and sending the viscosity information of the glue to the control chip; the control chip is used for acquiring the information of the sensor, a control algorithm is built in the control chip, and the control algorithm generates a control signal according to the viscosity information of the glue and sends the control signal to the motor driving module; and the control signal is used for controlling a switch of the motor and controlling the output power of the motor. By adjusting the output power of the motor, the glue outlet speed of the glue gun is accurately controlled, and it is ensured that the ideal gluing effect can be achieved in different working scenes.

Description

Technical Field

[0001] The invention relates to the technical field of electric tools, in particular to a continuously variable speed glue gun and an operating method thereof. Background Art

[0002] Glue gun is a tool for applying glue (or squeezing glue), which is widely used in building decoration, electronic appliances, automobiles and auto parts, ships and containers, etc. Existing glue guns require the operator to press the trigger to apply glue, and cannot accurately control the amount and speed of glue. At the same time, since it cannot sense the change of glue viscosity, it cannot guarantee to provide stable and accurate glue amount and speed according to different glue viscosities. Summary of the invention

[0003] The purpose of the present invention is to overcome the disadvantage that the glue gun in the prior art cannot ensure a stable glue output amount and glue output speed, and to provide a stepless speed-changing glue gun and an operating method.

[0004] The purpose of the present invention is achieved through the following technical solutions: Continuously variable speed glue gun, including: The motor drive module is used to receive the control signal of the control chip and drive the motor of the continuously variable speed glue gun to work; The load detection module is used to detect the viscosity of the glue discharged from the glue gun and send the viscosity information of the glue to the control chip; A control chip is used to obtain information from the load detection module. The control chip has a built-in control algorithm. The control algorithm generates a control signal according to the viscosity information of the glue and sends the control signal to the motor drive module. The control signal is used to control the switch of the motor and control the output power of the motor.

[0005] Preferably, the detection method of the load detection module is current detection, and the current detection is used to determine the pressure change of the glue during gluing.

[0006] Preferably, the continuously variable speed glue gun also includes a chip power supply module and a communication module. The chip power supply module is used to receive the DC power supply of the battery pack and provide working voltage for the control chip, motor drive module and communication module on the circuit board of the continuously variable speed glue gun. The communication module is used to carry out data communication between the control chip and the battery pack. The control chip detects the communication protocol with the battery pack and determines whether the communication between the control chip and the battery pack matches. If they match, the battery pack information is obtained to determine whether the battery pack is compatible with the motor. If they do not match, an alarm is issued.

[0007] Preferably, the continuously variable speed glue gun also includes an LED module for displaying the working status of the motor, and for displaying corresponding prompts as to whether the communication between the control chip and the battery pack determined by the communication module matches.

[0008] The operating method of the continuously variable speed glue gun comprises the following steps: Step 1: Press the trigger of the continuously variable speed glue gun, and the continuously variable speed glue gun starts working; Step 2, detecting whether the working parameters of the continuously variable speed glue gun are within the normal range, if the working parameters are within the normal range, jumping to step 3, if the working parameters are not within the normal range, the continuously variable speed glue gun stops working; Step 3, the motor drive module controls the output power of the motor according to the control signal output by the current control chip; Step 4: The motor starts to work by rotating forward, and the continuously variable speed glue gun discharges glue.

[0009] Preferably, in the step 2, detecting whether the operating parameters of the continuously variable speed glue gun are within a normal range includes: whether a short circuit occurs in the circuit, whether the voltage of the DC power supply of the battery pack meets the standard, whether the communication between the control chip and the battery pack matches, and whether the push rod position of the speed-changing glue gun detected by the Hall sensor is within a reasonable range.

[0010] Preferably, after the motor starts to rotate forward, the load detection module monitors the viscosity of the glue discharged from the glue gun in real time, and sends the viscosity information of the glue to the control chip. The control algorithm of the control chip generates a control signal in real time according to the viscosity information of the glue and sends the control signal to the motor drive module. The control signal controls the output power of the motor. When it is detected that the viscosity of the glue exceeds the upper limit, it automatically adjusts to an output power suitable for the current viscosity and outputs stably.

[0011] Preferably, when the motor is stalled, the control chip continues to reduce the output power of the motor until the motor stops running.

[0012] The beneficial effect of the present invention is that the continuously variable speed glue gun of the present invention adjusts the output power of the motor to accurately control the glue delivery speed of the glue gun, thereby ensuring that an ideal glue application effect can be achieved in different working scenarios. At the same time, the present invention will also perform corresponding protection actions for undervoltage, short circuit, stall, etc., thereby increasing the service life of the continuously variable speed gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a circuit principle block diagram of the present invention; Figure 2 It is a schematic diagram of a process of the present invention.

[0014] Among them: 1. Motor drive module, 2. Load detection module, 3. Control chip, 4. Chip power supply module, 5. Communication module, 6. Battery pack, 7. LED module. DETAILED DESCRIPTION

[0015] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0016] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0017] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0018] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0019] Example: Continuously variable speed glue gun, such as Figure 1 As shown, including: The motor drive module 1 is used to receive the control signal of the control chip and drive the motor of the continuously variable speed glue gun to work; Load detection module 2, used to detect the viscosity of glue discharged from the glue gun and send the viscosity information of the glue to the control chip; The control chip 3 is used to obtain the information of the load detection module. The control chip has a built-in control algorithm. The control algorithm generates a control signal according to the viscosity information of the glue and sends the control signal to the motor drive module; The control signal is used to control the switch of the motor and control the output power of the motor.

[0020] The continuously variable speed glue gun also includes a chip power supply module 4 and a communication module 5. The chip power supply module is used to receive the DC power supply of the battery pack 6 and provide working voltage for the control chip, motor drive module and communication module on the circuit board of the continuously variable speed glue gun. The communication module is used to control data communication between the chip and the battery pack. The control chip detects the communication protocol with the battery pack and determines whether the communication between the control chip and the battery pack matches. If they match, the information of the battery pack is obtained to determine whether the battery pack is compatible with the motor. If they do not match, an alarm is issued.

[0021] Through the cooperation of the communication module and the control chip, data communication and protocol detection between the CVT glue gun and the battery pack are realized. This ensures that only the matching battery pack can power the CVT glue gun, avoiding equipment failure or performance degradation due to incompatibility.

[0022] The continuously variable speed glue gun also includes an LED module 7 for displaying the working status of the motor and for displaying corresponding prompts for information on whether the communication between the control chip and the battery pack is matched as determined by the communication module.

[0023] The detection method of the load detection module is current detection, and the current detection is used to determine the pressure change of the glue during the gluing process.

[0024] The pressure load detection module indirectly infers the viscosity of the glue by detecting the pressure changes when the glue flows in the pipe. The greater the viscosity, the greater the resistance (i.e. pressure) generated during flow; the flow rate load detection module determines the viscosity of the glue by detecting the flow rate of the glue in the pipe or at the glue outlet. The greater the viscosity, the slower the flow rate of the glue, and vice versa. The smaller the viscosity, the smaller the flow rate of the glue.

[0025] How to operate the CVT glue gun, such as Figure 2 As shown, the following steps are included: Step 1: Press the trigger of the continuously variable speed glue gun, and the continuously variable speed glue gun starts working; Step 2, detecting whether the working parameters of the continuously variable speed glue gun are within the normal range, if the working parameters are within the normal range, jumping to step 3, if the working parameters are not within the normal range, the continuously variable speed glue gun stops working; Step 3, the motor drive module controls the output power of the motor according to the control signal output by the current control chip; Step 4: The motor starts to work by rotating forward, and the continuously variable speed glue gun discharges glue.

[0026] In step 2, detecting whether the working parameters of the continuously variable speed glue gun are within a normal range includes: Check whether there is a short circuit in the circuit, whether the voltage of the DC power supply of the battery pack meets the standard, whether the communication between the control chip and the battery pack matches, and whether the push rod position of the speed-changing glue gun detected by the Hall sensor is within a reasonable range.

[0027] After the motor starts to rotate forward, the load detection module monitors the viscosity of the glue discharged from the glue gun in real time and sends the viscosity information of the glue to the control chip. The control algorithm of the control chip generates a control signal in real time according to the viscosity information of the glue and sends the control signal to the motor drive module. The control signal controls the output power of the motor. When it is detected that the viscosity of the glue exceeds the upper limit, it automatically adjusts to an output power suitable for the current viscosity and outputs stably.

[0028] When the motor is stalled, the control chip continues to reduce the output power of the motor until the motor stops running.

[0029] When the trigger is fully released, the motor stops working. At this time, the motor needs to reverse to make the push rod move back to prevent excessive glue overflow.

[0030] In this embodiment, the specific structural parameters of the continuously variable speed glue gun are as follows: Motor drive module: It uses a high-efficiency DC motor as the power source. The motor model is RS550PH-18V-20500RPM and the rated voltage is 18V. The motor drive module receives the control signal from the control chip and adjusts the motor speed and output power through PWM (pulse width modulation) technology.

[0031] Control chip: It uses a high-performance single-chip microcomputer as the control core, model MCU-PY32F002BF15P6TR, which has powerful data processing capabilities and rich peripheral interfaces. The control chip has a built-in control algorithm, which generates control signals in real time according to the information received from the load detection module and drives the motor through PWM.

[0032] Chip power supply module: uses a lithium battery pack as a DC power supply, with a battery capacity of 5Ah and an output voltage of 18V. The chip power supply module converts the DC power of the battery pack into a stable 12V and 5V voltage to provide operating voltage for the control chip, motor drive module and communication module.

[0033] Communication module: Serial communication is used to realize data communication between the control chip and the battery pack. The communication module is used to detect whether the communication protocol between the control chip and the battery pack matches, and to obtain the information of the battery pack to determine whether the battery pack is compatible with the motor.

[0034] LED module: used to display the working status of the motor (such as start, stop, fault, etc.) and the judgment result of the communication module (such as communication match, mismatch, etc.). The LED module uses high-brightness LED lamp beads, and the color is selected according to actual needs. Green indicates normal and red indicates fault.

[0035] When the user presses the trigger of the continuously variable speed glue gun, the trigger switch sends a start signal to the control chip.

[0036] After the control chip receives the start signal from the trigger switch, it immediately starts to detect the working parameters of the continuously variable speed glue gun. These parameters include whether there is a short circuit in the circuit, whether the voltage of the battery pack meets the standard (such as 18V±0.5), whether the communication between the control chip and the battery pack is matched, and whether the push rod position of the variable speed glue gun detected by the Hall sensor is within a reasonable range. If the working parameters are normal, the control chip generates a control signal in real time according to the information received from the load detection module (such as glue viscosity) and sends the signal to the motor drive module. After receiving the control signal, the motor drive module adjusts the speed and output power of the motor through PWM technology to achieve stepless speed change. After the motor starts to work in the forward direction, the load detection module monitors the viscosity of the glue gun in real time and sends the viscosity information of the glue to the control chip. The control algorithm of the control chip generates a new control signal in real time according to the viscosity information of the glue, and sends it to the motor drive module to adjust the output power of the motor. When it is detected that the viscosity of the glue exceeds the preset upper limit, it automatically adjusts to the output power suitable for the current viscosity and outputs stably.

[0037] When the motor is blocked, the control chip will immediately send a control signal to the motor drive module. The motor drive module controls the motor to reverse or stop working according to the control signal to avoid damage to the motor due to blocking. At the same time, the LED module will display the corresponding fault information to remind the user. When the user completely releases the trigger, the trigger switch sends a stop signal to the control chip. After receiving the stop signal, the control chip immediately stops sending control signals to the motor drive module, and the motor stops working. At the same time, the LED module will display the status information that the motor has stopped working.

[0038] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0039] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. Continuously variable speed glue gun, characterized by: include: The motor drive module is used to receive the control signal of the control chip and drive the motor of the continuously variable speed glue gun to work; The load detection module is used to detect the viscosity of the glue discharged from the glue gun and send the viscosity information of the glue to the control chip; A control chip is used to obtain information from the load detection module. The control chip has a built-in control algorithm. The control algorithm generates a control signal according to the viscosity information of the glue and sends the control signal to the motor drive module. The control signal is used to control the switch of the motor and control the output power of the motor.

2. The continuously variable speed glue gun according to claim 1, characterized in that: The detection method of the load detection module is current detection, and the current detection is used to determine the pressure change of the glue during the gluing process.

3. The continuously variable speed glue gun according to claim 1 or 2, characterized in that: It also includes a chip power supply module and a communication module. The chip power supply module is used to receive the DC power supply of the battery pack and provide working voltage for the control chip, motor drive module and communication module on the continuously variable speed glue gun circuit board. The communication module is used to control data communication between the chip and the battery pack. The control chip detects the communication protocol with the battery pack and determines whether the communication between the control chip and the battery pack matches. If they match, the information of the battery pack is obtained to determine whether the battery pack is compatible with the motor. If they do not match, an alarm is issued.

4. The continuously variable speed glue gun according to claim 3, characterized in that: It also includes an LED module for displaying the working status of the motor, and for displaying corresponding prompts for information on whether the communication between the control chip and the battery pack determined by the communication module matches.

5. A method for operating a continuously variable speed glue gun, based on the continuously variable speed glue gun according to claim 1, characterized in that: The following steps are involved: Step 1: Press the trigger of the continuously variable speed glue gun, and the continuously variable speed glue gun starts working; Step 2, detecting whether the working parameters of the continuously variable speed glue gun are within the normal range, if the working parameters are within the normal range, jumping to step 3, if the working parameters are not within the normal range, the continuously variable speed glue gun stops working; Step 3, the motor drive module controls the output power of the motor according to the control signal output by the current control chip; Step 4: The motor starts to work by rotating forward, and the continuously variable speed glue gun discharges glue.

6. The method for operating a continuously variable speed glue gun according to claim 5, characterized in that: In step 2, detecting whether the working parameters of the continuously variable speed glue gun are within a normal range includes: Check whether there is a short circuit in the circuit, whether the voltage of the DC power supply of the battery pack meets the standard, whether the communication between the control chip and the battery pack matches, and whether the push rod position of the speed-changing glue gun detected by the Hall sensor is within a reasonable range.

7. The method for operating a continuously variable speed glue gun according to claim 5, characterized in that: After the motor starts to rotate forward, the load detection module monitors the viscosity of the glue discharged from the glue gun in real time and sends the viscosity information of the glue to the control chip. The control algorithm of the control chip generates a control signal in real time according to the viscosity information of the glue and sends the control signal to the motor drive module. The control signal controls the output power of the motor. When it is detected that the viscosity of the glue exceeds the upper limit, it automatically adjusts to an output power suitable for the current viscosity and outputs stably.

8. The method for operating a continuously variable speed glue gun according to claim 5, characterized in that: When the motor is stalled, the control chip continues to reduce the output power of the motor until the motor stops running.

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