Control method and system for hedge trimmer and hedge trimmer

Abstract

The invention relates to a control method and system for a hedge trimmer and the hedge trimmer, and the method comprises the steps: receiving a trigger signal of a first key, and entering a high-performance working mode; in the high-performance working mode, the current value of the motor is detected in real time; if the current value reaches the first current threshold value and is lower than the second current threshold value, starting a countdown timer, and after timing of the countdown timer is finished, controlling the hedge trimmer to exit the high-performance working mode and enter a cooling mode; if the current value reaches a second current threshold value, directly controlling the hedge trimmer to exit from the high-performance working mode and enter a cooling mode; wherein in the cooling mode, the motor is prohibited from being started, the cooling timer is started, and after the cooling timer times the preset cooling duration, the hedge trimmer is controlled to exit from the cooling mode. The hedge trimmer has the advantages that the operation efficiency and the use experience of the hedge trimmer are improved, dangers caused by overlarge current can be prevented, and overheating of the motor is prevented.

Description

Technical Field

[0001] This invention relates to the field of garden machinery technology, and in particular to a control method, system and hedge trimmer for hedge trimmers. Background Technology

[0002] A hedge trimmer is a common power tool used for trimming hedges, suitable for tea gardens, parks, courtyards, and roadsides. Existing hedge trimmers consist of a body and a blade assembly. The blade assembly, driven by a power mechanism within the body, performs a high-speed reciprocating linear motion to cut branches between the blade teeth.

[0003] Hedge cutters typically have overcurrent protection mechanisms. When the controller detects that the current exceeds its set safety threshold, it will cut off the power supply to prevent damage or malfunction due to excessive current. However, this also limits the hedge cutter's cutting capacity. If the safety threshold is set too high, the motor is prone to burnout after continuous long-term operation, affecting the hedge cutter's lifespan. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to provide a control method, system and hedge trimmer for hedge trimmers.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A control method for a hedge trimmer, applied to a hedge trimmer, the method comprising: Upon receiving the trigger signal from the first button, it enters high-performance working mode; In the high-performance operating mode, the motor current value is detected in real time; If the current value reaches the first current threshold but is lower than the second current threshold, a countdown timer is started, and after the countdown timer finishes, the hedge trimmer is controlled to exit the high-performance working mode and enter the cooling mode. If the current value reaches the second current threshold, the hedge trimmer is directly controlled to exit the high-performance working mode and enter the cooling mode. In the cooling mode, the motor is prohibited from starting, and a cooling timer is started. After the cooling timer has recorded a preset cooling duration, the hedge trimmer is controlled to exit the cooling mode.

[0006] Understandably, by setting a high-performance working mode, the motor load is managed in stages. When the current is between the first and second current thresholds, a buffer period is provided, allowing the hedge trimmer to complete high-intensity work while ensuring safety. When the current is too high, the power is immediately cut off for protection. This not only improves the working efficiency and user experience of the hedge trimmer, but also prevents the danger caused by excessive current and prevents the motor from overheating.

[0007] In one embodiment, the hedge trimmer is powered on by simultaneously triggering the front and rear triggers and enters a normal operating mode, in which the motor current value is maintained below the first current threshold.

[0008] In one embodiment, the duration of the countdown timer can be adjusted between 1 second and 10 seconds.

[0009] In one embodiment, the preset cooling duration of the cooling timer is set between 1 minute and 5 minutes.

[0010] In one embodiment, the method further includes: Receive the trigger signals from the front trigger and the second button to control the hedge trimmer to enter the retractable blade mode; In the retracting blade mode, the motor is controlled to reverse a set number of revolutions to drive the blades of the hedge trimmer to retract, and the reverse current value is detected in real time; If the reverse current value does not exceed the blade retraction current threshold and the blade retracts to the preset stroke, the blade retraction is determined to be successful, and the hedge trimmer is controlled to exit the blade retraction mode. If the reverse current value exceeds the blade retraction current threshold, the blade retraction is determined to have failed, and the hedge trimmer is controlled to exit the blade retraction mode.

[0011] In one embodiment, the set number of revolutions is 0.5 revolutions.

[0012] In one embodiment, the tool retraction mode can be triggered in either the normal operating mode or the high-performance operating mode. This invention also provides the following technical solutions: A hedge trimmer control system for implementing the control method as described in any of the preceding claims, the system comprising: The signal detection module is used to collect the trigger signals of the first button, the front trigger of the second button, and the rear trigger; The current sampling module is used to collect the motor current value in real time; A controller, electrically connected to the signal detection module and the current sampling module, is configured to execute the control method; A motor drive module, connected to the controller, is used to drive the motor to rotate forward, reverse, or stop according to the instructions of the controller; A countdown timer is used to start when the current value reaches a first current threshold and falls below a second current threshold. A cooling timer is used to start when the hedge trimmer enters cooling mode.

[0013] This invention also provides the following technical solutions: A hedge trimmer includes a body, a controller, a motor, and blades. The controller and the motor are disposed inside the body, and the blades are connected to the body. The body is provided with a first button, a second button, a front trigger, and a rear trigger. The controller is used to execute the control method of the hedge trimmer as described above.

[0014] Effects of the invention: The control method, system, and hedge trimmer claimed in this invention achieve hierarchical management of motor load by setting a high-performance working mode. When the current is between the first current threshold and the second current threshold, a buffer period is provided, allowing the hedge trimmer to complete high-intensity operations while ensuring safety. When the current is instantaneously too high, the power is immediately cut off for protection. This not only improves the working efficiency and user experience of the hedge trimmer but also prevents danger caused by excessive current and prevents the motor from overheating. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of a high-performance operating mode provided in an embodiment of the present invention; Figure 2 This is a flowchart of the tool retraction mode provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a hedge generator provided in an embodiment of the present invention.

[0017] Attached reference numerals: 100, hedge trimmer; 10, body; 11, first button; 12, second button; 13, front trigger; 14, rear trigger; 20, blade. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0023] Please see Figure 1An embodiment of the present invention provides a control method for a hedge trimmer 100, which is applied to the hedge trimmer 100. The method includes: receiving a trigger signal from a first button 11 to enter a high-performance working mode; in the high-performance working mode, detecting the current value of the motor in real time; if the current value reaches a first current threshold and is lower than a second current threshold, starting a countdown timer, and after the countdown timer ends, controlling the hedge trimmer 100 to exit the high-performance working mode and enter a cooling mode; if the current value reaches the second current threshold, directly controlling the hedge trimmer 100 to exit the high-performance working mode and enter a cooling mode.

[0024] In cooling mode, the motor is prohibited from starting, and a cooling timer is started. After the cooling timer has recorded the preset cooling duration, the hedge trimmer 100 is controlled to exit the cooling mode.

[0025] The hedge trimmer 100 is powered on by simultaneously triggering the front trigger 13 and the rear trigger 14, and then enters the normal operating mode. In the normal operating mode, the controller's overcurrent protection mechanism keeps the motor current below a first current threshold. After the hedge trimmer 100 is powered on, the user can press and hold the first button 11 to enter the high-performance operating mode as needed.

[0026] In other words, when the hedge trimmer 100 needs to operate at full performance, pressing and holding the first button 11 will put the hedge trimmer 100 into high-performance mode. In this mode, the controller's overcurrent protection mechanism has a higher current threshold than during normal operation. During use, the controller monitors the overall current of the hedge trimmer 100. When the current reaches the first current threshold, the high-performance mode ends and a countdown begins. After the countdown, the hedge trimmer 100 enters cooling mode. When the current reaches the second current threshold, the hedge trimmer 100 directly enters cooling mode. In cooling mode, the hedge trimmer 100 cannot be started. The cooling mode continues for a preset duration before ending, and the machine can then be used normally.

[0027] This configuration enables tiered management of the load on the hedge trimmer 100 motor. When the current is between the first and second current thresholds, a buffer period is provided, allowing the hedge trimmer 100 to complete high-intensity operations while ensuring safety. When the current is excessively high, the power is immediately cut off for protection. This not only improves the operating efficiency and user experience of the hedge trimmer 100 but also prevents excessive current from causing danger and avoids motor overheating and burning out the motor.

[0028] In this embodiment, the countdown timer duration can be adjusted between 1 second and 10 seconds. Specifically, the countdown timer duration can be set to 1 second, 5 seconds, 8 seconds, or 10 seconds, etc. Setting the countdown duration allows the hedge trimmer 100 to temporarily overload and improve operational efficiency, providing a certain buffer time.

[0029] The preset cooling timer duration is set between 1 and 5 minutes, and can be specifically set to 1 minute, 2 minutes, 3 minutes, 4 minutes, or 5 minutes, which can be adjusted according to usage requirements. After the cooling mode ends, it immediately enters normal operating mode, reducing unnecessary downtime.

[0030] The blades 20 of the hedge trimmer 100 are easily entangled and jammed by tough branches or vines during trimming, requiring a blade retraction function to release the jam. Most hedge trimmers 100 require the user to manually clear the jammed branches before they can be used again, and some machines with self-retraction functions also suffer from retraction failures, detection errors, and blade jamming. Therefore, the hedge trimmer 100 of this invention is equipped with a blade retraction function to facilitate smoother operation.

[0031] Please see Figure 2 In one embodiment, the method further includes: receiving trigger signals from the front trigger 13 and the second button 12 to control the hedge trimmer 100 to enter the blade retraction mode; in the blade retraction mode, controlling the motor to reverse a set number of revolutions at maximum output capacity to drive the blades 20 of the hedge trimmer 100 to retract, and detecting the reverse current value in real time. If the reverse current value does not exceed the blade retraction current threshold, and the blades 20 retract to a preset stroke, it indicates that the blades 20 can run normally and smoothly, and the jamming between the blades 20 is eliminated, then the blade retraction is determined to be successful, and the hedge trimmer 100 is controlled to exit the blade retraction mode; if the reverse current value exceeds the blade retraction current threshold, and the blades 20 do not reverse to the set number of revolutions, it indicates that the blades 20 are jammed, causing the motor to rotate but unable to drive the blades 20 to retract, and the jamming between the blades 20 is not eliminated, the blade retraction fails, and in order to prevent the motor from burning out, the hedge trimmer 100 is controlled to exit the blade retraction mode. The blade retraction current threshold can be equal to the value of the second current threshold in the high-performance mode, or other values ​​can be set.

[0032] After exiting the blade retraction mode, the hedge trimmer 100 returns to the operating mode it was in before triggering the retraction mode. If blade retraction fails, the user is reminded to manually clean debris between the blades 20 to eliminate blade jamming. In this way, by monitoring the reverse current and the preset stroke of the blades 20 to comprehensively determine whether blade retraction was successful, misjudgments that might occur due to relying solely on current or time are avoided, greatly improving the convenience of blade retraction.

[0033] In this embodiment, the set number of motor rotations is 0.5 revolutions, at which point the tool retraction is most successful. Of course, in other embodiments, the set number of revolutions can also be set to 0.8 revolutions, 1 revolution, or 1.5 revolutions, etc.

[0034] It should be noted that after the motor of the hedge trimmer 100 is started, it transmits power to the blades 20 through the transmission mechanism, driving the blades 20 to perform reciprocating linear motion. The two blades 20 work together to generate shearing force. The preset travel distance of the blades 20 backward is the travel distance that the blades 20 move by rotating the motor a set number of times.

[0035] The retraction mode can be triggered in high-performance operating mode. Of course, the retraction mode can also be triggered in normal operating mode.

[0036] The present invention also provides a control system for a hedge trimmer 100, the system comprising: a signal detection module for acquiring trigger signals from a first button 11, a second button 12, a front trigger 13, and a rear trigger 14; a current sampling module for acquiring the current value of the motor in real time; a controller for being electrically connected to the signal detection module and the current sampling module, and configured to execute the control method of the hedge trimmer 100 described above; a motor drive module connected to the controller for driving the motor to rotate forward, reverse, or stop according to the instructions of the controller; a countdown timer for starting when the current value reaches a first current threshold and is lower than a second current threshold; and a cooling timer for starting when the hedge trimmer 100 enters the cooling mode.

[0037] Please see Figure 3 The present invention also provides a hedge trimmer 100, including a body 10, a controller, a motor and a blade 20. The controller and the motor are disposed inside the body 10, and the blade 20 is connected to the body 10. The body 10 is provided with a first button 11, a second button 12, a front trigger 13 and a rear trigger 14. The controller is used to execute the control method of the hedge trimmer 100 as described above.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the patent protection scope of the present invention should be determined by the appended claims.

Claims

1. A control method for a hedge trimmer, characterized in that, Applied to hedge trimmers, the method includes: Upon receiving the trigger signal from the first button, it enters high-performance working mode; In the high-performance operating mode, the motor current value is detected in real time; If the current value reaches the first current threshold but is lower than the second current threshold, a countdown timer is started, and after the countdown timer finishes, the hedge trimmer is controlled to exit the high-performance working mode and enter the cooling mode. If the current value reaches the second current threshold, the hedge trimmer is directly controlled to exit the high-performance working mode and enter the cooling mode. In the cooling mode, the motor is prohibited from starting, and a cooling timer is started. After the cooling timer has recorded a preset cooling duration, the hedge trimmer is controlled to exit the cooling mode.

2. The control method for a hedge trimmer according to claim 1, characterized in that, The hedge trimmer is powered on by simultaneously triggering the front and rear triggers and enters a normal operating mode. In this normal operating mode, the motor current value is maintained below the first current threshold.

3. The control method for a hedge trimmer according to claim 1, characterized in that, The duration of the countdown timer can be adjusted between 1 second and 10 seconds.

4. The control method for a hedge trimmer according to claim 1, characterized in that, The preset cooling duration of the cooling timer is set between 1 minute and 5 minutes.

5. The control method for a hedge trimmer according to claim 2, characterized in that, The method further includes: Receive the trigger signals from the front trigger and the second button to control the hedge trimmer to enter the retractable blade mode; In the retracting blade mode, the motor is controlled to reverse a set number of revolutions to drive the blades of the hedge trimmer to retract, and the reverse current value is detected in real time; If the reverse current value does not exceed the blade retraction current threshold and the blade retracts to the preset stroke, the blade retraction is determined to be successful, and the hedge trimmer is controlled to exit the blade retraction mode. If the reverse current value exceeds the blade retraction current threshold, the hedge trimmer is controlled to exit the blade retraction mode.

6. The control method for a hedge trimmer according to claim 5, characterized in that, The set number of revolutions is 0.5 revolutions.

7. The control method for a hedge trimmer according to claim 5, characterized in that, The tool retraction mode can be triggered in either the normal working mode or the high-performance working mode.

8. A hedge trimmer control system, characterized in that, The system for implementing the control method as described in any one of claims 1-7 includes: The signal detection module is used to collect the trigger signals of the first button, the front trigger of the second button, and the rear trigger; The current sampling module is used to collect the motor current value in real time; A controller, electrically connected to the signal detection module and the current sampling module, is configured to execute the control method; A motor drive module, connected to the controller, is used to drive the motor to rotate forward, reverse, or stop according to the instructions of the controller; A countdown timer is used to start when the current value reaches a first current threshold and falls below a second current threshold. A cooling timer is used to start when the hedge trimmer enters cooling mode.

9. A hedge trimmer, characterized in that, The device includes a body, a controller, a motor, and blades. The controller and the motor are disposed inside the body, and the blades are connected to the body. The body is provided with a first button, a second button, a front trigger, and a rear trigger. The controller is used to execute the control method of the hedge trimmer as described in any one of claims 1-7.

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