Shearing device and shearing method

Abstract

The shearing device and shearing method provided in this application include a shearing unit, a driving unit, a trigger switch, and a control unit. The driving unit is connected to the shearing unit and is used to drive the shearing unit to move. The trigger switch is located between the driving unit and the shearing unit and is used to send a feedback signal after the driving unit is pressed against the shearing unit as it moves from its initial position toward the shearing unit. The control unit is communicatively connected to the trigger switch and is used to determine the motion state of the shearing unit based on the received feedback signal. The position of the trigger switch can be adjusted along the motion direction of the driving unit. The shearing device can accurately determine the motion state of the shearing unit to determine the cutting state of the workpiece without affecting the driving output force of the driving unit, ensuring the performance of the shearing device. It can solve the problem of shearing blade wear in the shearing unit affecting the judgment of the shearing device, making the shearing device design reasonable and safe and convenient to use.

Description

Technical Field

[0001] This application relates to the field of shearing tools, and discloses a shearing device and shearing method. Background Technology

[0002] Cutting devices are used to cut high-voltage cables. However, in environments such as high altitudes, bright sunlight, or fog, operators often cannot directly observe the state of the object being cut. Some devices determine whether a cut has been made by detecting the cutting pressure or the voltage and current of the drive mechanism and comparing them to preset limit values. However, for large or tough objects, even if the drive mechanism reaches its limit, the object may not be completely cut, and the device may falsely report a successful cut. This means the high-voltage cable has not been completely severed, posing a risk of electrical leakage and creating a safety hazard for the operator.

[0003] Other devices use displacement sensors to detect the stroke of the drive component and determine whether the object being cut has been cut. However, the sensors weaken the output drive force, affecting the cutting performance. Furthermore, the sensors are easily damaged as the drive component moves, requiring frequent replacement and increasing costs.

[0004] Therefore, there is an urgent need for a shearing device and shearing method to solve the above technical problems. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a shearing device to solve the above-mentioned technical problems.

[0006] In a first aspect, this application provides a shearing device, including: a shearing unit, a driving unit, a trigger switch, and a control unit; The driving unit is connected to the shearing unit and is used to drive the shearing unit to operate; The trigger switch is located between the drive unit and the shearing unit. The trigger switch is used to send a feedback signal after the drive unit is pressed during the movement toward the shearing unit. The control unit is communicatively connected to the trigger switch and is used to determine the motion state of the shearing unit based on the received feedback signal. The position of the trigger switch can be adjusted along the movement direction of the drive unit.

[0007] Secondly, this application provides a shearing method applied to the aforementioned shearing device, the shearing device comprising a shearing unit, a driving unit, a trigger switch, and a control unit, the shearing method comprising: Start the drive unit to drive the shearing unit to operate; The drive unit moves from its initial position until it presses against the trigger switch and sends a feedback signal. The control unit determines the operating status of the shearing unit based on the reception of the feedback signal.

[0008] The tool management system of this application has the following technical advantages: 1. The shearing device provided in this application controls whether the trigger switch can send a feedback signal based on whether the drive unit runs to the position of the pressure-contact trigger switch, and determines the operating status of the shearing unit based on whether the control unit receives the feedback signal from the trigger switch. Based on the received feedback signal, it is determined that the shearing unit is closed; based on the absence of a feedback signal within a stored time period, it is determined that the shearing unit is open; based on the absence of a feedback signal beyond the stored time period, it is determined that the shearing has failed. This forms a complete closed loop in the operating status of the shearing unit, making the feedback result of whether the shearing object has been cut by the shearing unit more accurate. Users can clearly know whether the object has been cut during shearing operations. Compared with existing technologies, there is no possibility of judgment error, reducing safety hazards in shearing operations. Furthermore, it does not affect the driving force output by the drive unit, eliminates the need for frequent maintenance, and reduces the operating cost of the shearing device.

[0009] 2. The shearing device provided in this application sets the position of the trigger switch to be adjustable along the movement direction of the drive unit. This can eliminate processing and assembly errors during the production process of the shearing device, improve the accuracy of the control unit's judgment on the movement state of the shearing unit, ensure the accuracy of the operator's shearing judgment, and guarantee the lifespan of the shearing unit. The adjustment of the trigger switch position can also compensate for the wear of the shearing blades in the shearing unit, ensure the accuracy of the shearing judgment, and improve the rationality of the shearing device design. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the shearing device provided in the embodiments of this application; Figure 2 A structural view of the trigger switch provided in the embodiments of this application; Figure 3 for Figure 2 Enlarged schematic diagram of part A; Figure 4 A flowchart of the cutting method provided in the embodiments of this application; Figure 5 A flowchart illustrating the method for determining the position of a trigger switch provided in an embodiment of this application; Figure 6 A flowchart illustrating the driver unit protection mechanism provided in this application embodiment.

[0012] Figure label: 1. Shearing unit; 11. Shearing blade; 12. Rotary connector; 2. Drive unit; 21. Pressing part; 3. Trigger switch; 31. Body; 32. Pressing contact point; 33. Actuator; 4. Transmission part; 5. Display unit. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0014] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0015] Cutting devices are widely used in fields such as power construction. They are used to cut high-voltage cables in high-altitude environments. When performing high-altitude operations, it is inconvenient for operators to directly observe the cutting status of the object being cut under sunlight or in foggy weather. They cannot directly determine whether the object has been completely cut. If the high-voltage cable is not completely cut, there is a high risk of leakage, which poses a safety hazard to the operators.

[0016] To address these issues, some existing shearing devices detect the pressure of the cutting blade or the voltage or current of the drive unit, comparing these values ​​with preset thresholds. If the detected value reaches the preset threshold, the device determines that the object has been cut and issues a notification. These preset thresholds are determined based on the pressure on the cutting blade or the voltage and current of the drive unit when it is at its limit. However, for large or tough objects, even if the drive unit reaches its limit but the object is not completely cut, the shearing device may still issue a successful cut notification, leading to misjudgment by the operator.

[0017] To address the issue of misjudgments caused by detecting pressure, voltage, or current values, some shearing devices determine whether the device is closed and whether the workpiece has been cut by detecting the travel distance of the drive component. This is mostly achieved by installing displacement sensors on the drive component to obtain its travel distance. However, installing displacement sensors on the drive component affects the output driving force, reducing it and impacting the shearing performance of the device, thus affecting its usability. Furthermore, displacement sensors are prone to damage during the drive component's movement, requiring periodic replacement and resulting in wasted costs.

[0018] For the reasons mentioned above, this application provides a cutting device to solve the aforementioned technical problems.

[0019] like Figures 1 to 3 As shown in the figure, this embodiment provides a shearing device, including a shearing unit 1, a driving unit 2, a trigger switch 3, and a control unit. The driving unit 2 is connected to the shearing unit 1 and is used to drive the shearing unit 1 to open and close, and to shear the workpiece. The trigger switch 3 is located between the driving unit 2 and the shearing unit 1. The trigger switch 3 is used to send a feedback signal after the driving unit 2 is pressed during its movement toward the shearing unit 1. The control unit is communicatively connected to the trigger switch 3 and is used to determine the movement state of the shearing unit 1 based on the reception of the feedback signal.

[0020] Based on the feedback signal received by the control unit, it can be deduced that the drive unit 2 moves to the position of the trigger switch 3, triggering the switch 3 to be pressed and sending a feedback signal, thus determining that the shearing unit 1 is closed and the object being sheared is cut. If no feedback signal is received, it is determined that the shearing unit 1 cannot close, and the shearing fails.

[0021] The control unit can store time data for judgment. If the control unit does not receive a feedback signal within the stored time data, it can deduce that the drive unit 2 has not moved to the trigger switch 3 position, the trigger switch 3 has not been pressed, and no feedback signal has been issued, thus determining that the shearing unit 1 is in the shearing state. If the movement time of the drive unit 2 exceeds the time data stored by the control unit, it is determined that the object being sheared has exceeded the limit operating state of the shearing device, and the shearing has failed. The control unit can time the overall operation time of the drive unit 2, compare the real-time time data obtained with the stored time data, determine whether the overall operation time of the drive unit 2 exceeds the stored time data, and determine the operating state of the shearing unit 1 based on the judgment result and the received feedback signal.

[0022] The shearing device provided in this embodiment controls whether the trigger switch 3 can send a feedback signal based on whether the drive unit 2 runs to the position of the pressure-contact trigger switch 3, and determines the operating state of the shearing unit 1 based on whether the control unit receives the feedback signal from the trigger switch 3. Based on the received feedback signal, it is determined that the shearing unit 1 is closed; based on the absence of a feedback signal within the stored time data, it is determined that the shearing unit 1 is open; based on the absence of a feedback signal beyond the stored time data, it is determined that the shearing has failed. This forms a complete closed loop in the operating state of the shearing unit 1, making the feedback result of whether the shearing object has been cut by the shearing unit 1 more accurate. Users can clearly know whether the object has been cut during shearing operations. Compared with existing technologies, there is no possibility of judgment error, reducing safety hazards in shearing operations. Furthermore, it does not affect the driving force output by the drive unit 2, eliminates the need for frequent maintenance, and reduces the operating cost of the shearing device.

[0023] The control unit can include a timing module and a time comparison module. The control unit is communicatively connected to the drive unit 2. When the drive unit 2 starts, it transmits a power-on signal. Upon receiving the power-on signal, the control unit controls the timing module to begin timing. The timing module is connected to the time comparison module, transmitting real-time time data to it. Stored time data is also stored within the time comparison module. The time comparison module compares the received real-time time data with the stored time data to obtain a comparison result. The control unit can also include a judgment module. A module within the control unit that receives feedback signals is connected to the judgment module, providing feedback on the received signals. Similarly, the time comparison module is connected to the judgment module, providing its comparison result. Based on the received feedback signals and the comparison result, the judgment module determines the operating status of the shearing unit 1.

[0024] The trigger switch 3 and the control unit can communicate via Bluetooth. The control unit can be a controller or a remote control. After receiving a feedback signal and indicating that the cutting is complete, the operator can send a corresponding command to the control unit to reset the drive unit 2; or, after receiving a feedback signal, the control unit can send a corresponding signal to the drive unit 2 to reset the drive unit 2, thus preventing the cutting unit 1 from over-closing and ensuring its service life.

[0025] The shearing unit 1 includes a shearing blade 11 for shearing the workpiece. During the research and development process, the applicant discovered that the drive unit 2 and the shearing unit 1 in the shearing device have processing errors during manufacturing and assembly errors during assembly. This could result in situations where, when the shearing unit 1 is closed, the trigger switch 3 is not engaged to send a feedback signal. The control unit only receives the feedback signal after the shearing unit 1 has been partially closed, thus controlling the drive unit 2 to reset, affecting the service life of the shearing device. Alternatively, if the shearing unit 1 is not closed, the drive unit 2 engages the trigger switch 3 to send a feedback signal. Upon receiving the feedback signal, the control unit controls the drive unit 2 to reset, and the shearing unit 1 opens accordingly, but the workpiece is not actually cut, creating a safety hazard.

[0026] It is also possible that after a period of use, the shearing blade 11 in the shearing unit 1 will wear out under long-term use. Correspondingly, during the process of the shearing unit 1 changing from open to closed, the stroke required for the drive unit 2 to move increases. If the position of the trigger switch 3 remains fixed, there will be a situation where the drive unit 2 presses the trigger switch 3, the control unit receives a feedback signal, but the shearing unit 1 has not actually closed.

[0027] To address the issues discovered during the research and development process, the position of the trigger switch 3 in this application can be adjusted along the movement direction of the drive unit 2. Processing and assembly errors during the production of the shearing device can be eliminated by adjusting the position of the trigger switch 3, improving the accuracy of the control unit's judgment of the shearing unit 1's movement state, ensuring the operator's accuracy in determining the cutting direction, and guaranteeing the lifespan of the shearing unit 1. Simultaneously, regarding the wear problem of the shearing blade 11, the operator can use the worn shearing blade 11 as a reference to determine the stroke required for the drive unit 2 to move from open to closed. Based on this newly determined stroke, the position of the trigger switch 3 is adjusted, i.e., the trigger switch 3 is moved closer to the drive unit 2, compensating for the wear of the shearing unit 1 and ensuring that the material being sheared is cut when the control unit receives the feedback signal, thus improving the rationality of the shearing device design.

[0028] In some optional embodiments, a guide member can be provided between the drive unit 2 and the shearing unit 1 to guide the movement of the drive unit 2. The trigger switch 3 can include a main body, which can be disposed on the guide member. The main body has a protrusion, and the guide member has a corresponding strip groove. The protrusion and the strip groove cooperate to adjust the position of the trigger switch. The main body can be selectively fixed to the guide member by a connector, thereby adjusting the position of the trigger switch 3 according to the usage state of the shearing unit 1. Fixing with the connector ensures the accuracy of the closing judgment of the shearing unit 1. The connector can be a bolt.

[0029] In some optional embodiments, the travel distance of the drive unit 2 from its initial position to the shear unit 1 in a closed state is a preset travel distance, which must be less than or equal to the full travel distance of the drive unit 2. Based on this standard, the specifications of the drive unit 2 can be selected to ensure that the drive unit 2 can drive the shear unit 1 to change between opening and closing. The position of the trigger switch 3 along the movement direction of the drive unit 2 is determined according to the preset travel distance. Specifically, after the position of the shear unit 1 is determined, the initial position of the drive unit 2 can be determined based on the preset travel distance. The distance between the initial position of the drive unit 2 and the shear unit 1 must be greater than or equal to the preset travel distance and less than or equal to the full travel distance. The position of the trigger switch 3 is flush with the end of the drive unit 2 closest to the shear unit 1 when it has completed the preset travel distance. In this way, after the drive unit 2 has traveled the preset travel distance, it will definitely be able to press against the trigger switch 3, making the determination that the shear unit 1 has reached the closed state more accurate. Optionally, a crimping part 21 can be provided at the end of the drive unit 2. The crimping part 21 is used to crimp the trigger switch 3. At this time, the position of the trigger switch 3 is flush with the crimping part 21 when the drive unit 2 has completed the preset stroke.

[0030] In some optional embodiments, the shearing unit 1 includes two shearing blades 11, and the driving unit 2 is connected to the shearing unit 1 via a transmission member 4. The preset stroke can be determined based on the target parameters of the shearing unit 1 and the transmission ratio between the driving unit 2 and the transmission member 4. Specifically, the target parameters may include the rotation angle of the shearing blades 11 during the transition of the shearing unit 1 from an open state to a closed state. The preset stroke is determined based on the change data of the transmission member 4 and the transmission ratio.

[0031] Optionally, the drive unit 2 can be a linear drive cylinder, and the transmission component 4 can be a linkage mechanism. The ratio between the rotation angle of the connecting rod and the extension length of the piston of the linear drive rod in the linkage mechanism is the transmission ratio. Once the specific structure of the linkage mechanism is determined, the transmission ratio between the linkage mechanism and the linear drive cylinder can be determined. The linkage mechanism connects the shearing unit 1 and the linear drive cylinder. Based on the rotation angle of the shearing blade 11, the rotation angle of the connecting rod can be derived and calculated. Then, through the transmission ratio, the extension length of the piston of the shearing unit 1 from opening to closing can be derived. The calculated value at this time is the preset stroke of the drive unit 2.

[0032] Optionally, the drive unit 2 may include a rotary output end, and the transmission component may be a multi-stage gear system. The rotary output end is connected to the shearing unit 1, driving the shearing blade 11 in the shearing unit 1 to rotate. The ratio between the rotation angle of the rotary transmission end and the rotation angle of the terminal gear in the gear system is the transmission ratio. The terminal gear is connected to the shearing unit 1, driving the shearing blade 11 in the shearing unit 1 to rotate. Based on the rotation angle of the shearing unit 1, the rotation angle of the terminal gear is derived according to the diameter ratio of the connecting gear of the shearing unit 1 to the terminal gear in the gear system. Given the terminal gear angle, the rotation angle of the rotary output end can be derived from the transmission ratio. Optionally, the drive unit 2 may be a rotary motor, with its output end meshing with the input gear of the gear system. The operating time of the drive unit 2 can be derived based on the angle of the rotary output end. Optionally, the drive unit 2 may also include a gear and rack structure, controlling the movement distance and direction of the rack to control the rotation of the corresponding gear. The gear in the drive unit 2 meshes with the input gear of the gear system, achieving connection with the transmission component 4.

[0033] In some alternative embodiments, the shearing unit 1 can be designed as a structure in which two shearing blades 11 rotate synchronously during the movement of the driving unit 2. In this structure, the rotation angle of the two shearing blades 11 is calculated to obtain a total rotation angle. Alternatively, it can be designed as a structure with one moving blade and one fixed blade. In this structure, the moving blade moves closer to the fixed blade, and the rotation angle of the moving blade can be calculated.

[0034] During the research and development process, the applicant discovered that, depending on the different structural designs of the shearing blades 11 in the shearing unit 1, there may be a risk that the material being sheared may not be completely cut off when the heads of the two shearing blades 11 are fully closed.

[0035] In response to the above situation, in some optional embodiments, when the drive unit 2 presses the trigger switch 3, the trigger switch 3 can change its spatial position to avoid the drive unit 2, allowing the drive unit 2 to continue moving for a first preset time before stopping or resetting. This causes the two shearing blades 11 in the shearing unit 1 to transitionally close, ensuring that the material being sheared can also be cut, further improving the rationality of the shearing device design. The first preset time can be in the range of 1S-5S, or other ranges, and is not specifically limited here.

[0036] In some optional embodiments, the trigger switch 3 includes a body 31, a pressure contact 32, and an actuator 33. The contact is disposed on the body 31, and the actuator 33 can rotate relative to the body 31. During the movement of the drive unit 2, it abuts against the actuator 33. As the drive unit 2 moves toward the shearing unit 1, the actuator 33 rotates toward the pressure contact 32 and avoids the drive unit 2 during the rotation until the end of the drive unit 2 facing the shearing unit 1 is flush with the pressure contact 32. The actuator 33 fully presses the pressure contact 32, and the pressure contact 32 is in contact with the conductive contact of the trigger switch 3. The trigger switch 3 emits a feedback signal to enable the control unit to confirm that the shearing unit 1 is closed.

[0037] In some optional embodiments, the trigger switch 3 may include a body 31 and a pressure contact point 32. The pressure contact point 32 is disposed on the body 31, and a guide slope is provided on the side of the pressure contact point 32 facing the drive unit 2. The pressure contact point 32 moves in its axial direction and, after being pressed, comes into contact with the conductive contact of the trigger switch 3, at which point the trigger switch 3 sends a feedback signal. When the drive unit 2 moves to the position of the pressure contact point 32, it continues to move along the guide slope, and the pressure contact point 32 moves in its axial direction to avoid the drive unit 2 until the circumference of the drive unit 2 completely presses against the pressure contact point 32. The pressure contact point 32 comes into contact with the conductive contact of the trigger switch 3, and the trigger switch 3 sends a feedback signal to the control unit to confirm that the shearing unit 1 is closed.

[0038] During the research and development process, the researchers discovered that the shearing device also needs to cut the cable core and sheath separately. The materials of different cable cores may be different, and the materials of different sheaths may also be different, that is, the materials of the materials to be cut may be different. For relatively soft materials, there may be cases where the materials to be cut are not cut when the shearing unit 1 is closed, which affects the applicability of the shearing device.

[0039] In some optional embodiments, the control unit can communicate with the drive unit 2 and, upon receiving a feedback signal, issue a reset signal to control the drive unit 2 to reset, thereby improving the automation level of the shearing device. For different materials to be sheared, the control unit can store data on different materials and a mapping relationship between different materials and a first preset time. The operator can select and confirm the material of the material to be sheared. Based on the metal material confirmed by the operator and the mapping table information, the control unit, upon receiving a feedback signal, issues a reset signal after a first preset time to reset the drive unit 2. During shearing operations, the operator can select the material to be sheared, the control unit confirms the material, and when the drive unit 2 presses the trigger switch 3, the control unit receives a feedback signal. Based on the stored mapping table content, the control unit issues a reset signal after the drive unit 2 continues to run for a corresponding first preset time to reset the drive unit 2, enabling the shearing device to automate shearing operations applicable to different materials. The material to be sheared can be a metallic material, such as aluminum or iron, or a non-metallic material, such as rubber or polytetrafluoroethylene.

[0040] The determination of the mapping table content can be based on a large amount of actual experimental data or it can be obtained by the applicant through simulation calculation using simulation software. This will not be elaborated on further here.

[0041] During the research and development process, the applicant discovered that judging the cutting method by the blade closure mechanism could be problematic for high-altitude operations. Operators might not be able to clearly see whether the material was correctly placed between the two shearing blades 11, leading to the shearing device operating without load. To address this issue, in some optional embodiments, the shearing unit 1 may include two shearing blades 11 and a pressure sensor. The pressure sensor is mounted on either shearing blade 11 to detect the real-time pressure value. The pressure sensor is communicatively connected to the control unit, transmitting the detected real-time pressure value to the control unit. The control unit reads the real-time pressure value and, based on this value, determines whether there is material between the two shearing blades 11. By setting the pressure sensor, if the value read by the control unit is consistently zero, it is determined that no material is placed between the shearing blades 11. If the value read by the control unit is greater than a preset value, it is determined that material is placed between the shearing blades 11. This avoids the shearing device operating without load. The preset value can be 10 MPa or other values, without specific limitations. Furthermore, the shearing unit 1 may also include a rotary connector 12 for connecting two shearing blades 11, allowing the two shearing blades 11 to move relative to each other and to approach each other. The rotary connector 12 may be a connecting pin.

[0042] In some optional embodiments, the control unit can communicate with the drive unit 2 and can determine and control the operating state of the drive unit 2. The control unit is used to determine the state of the shearing unit 1 and the workpiece to be sheared based on the operating state of the drive unit 2, the real-time pressure value read, and the feedback signal. In this way, the operator can be aware of the status of the drive unit 2 and the shearing unit 1 in real time, improving the ease of use of the shearing device.

[0043] Optionally, the operating state of the drive unit 2 may include a running state and a reset state. The control unit and the drive unit 2 can communicate via Bluetooth to control the operating state of the drive unit 2. The control unit may store a first preset value, a second preset value, and a second preset time. When the control unit controls the drive unit 2 to be in operation, the operation time is less than the second preset time, and the real-time pressure value read reaches the first preset value, it is determined that the shearing unit 1 is in the shearing state. The shearing unit 1 is shearing the workpiece. The first preset value can be the real-time pressure on the shearing blade 11 when it just comes into contact with the workpiece. The first preset value is a value greater than zero, which can be 10 MPa or other values, without specific restrictions.

[0044] When the control unit detects that the real-time pressure value is greater than the first preset value and receives a feedback signal, it determines that the material being cut has been successfully cut. Alternatively, if the control unit detects that the real-time pressure value is greater than the first preset value, indicating that the shearing unit 1 has contacted and is cutting the material, and receives a feedback signal, it determines that the shearing unit 1 has closed, the material has been cut, and the cutting is successful.

[0045] When the control unit receives a second preset value based on the real-time pressure reading and no feedback signal is received after a second time, the shearing operation is deemed to have failed. When the control unit receives a second preset value based on the real-time pressure reading, it can determine that shearing unit 1 is performing a shearing operation on the object being sheared, and that drive unit 2 has reached its limit. If, after shearing unit 1 has moved for a second preset time, trigger switch 3 does not send a feedback signal, then shearing unit 1 cannot close when shearing the object. This indicates that the volume or material of the object being sheared exceeds the shearing device's limit shearing range, and the shearing device cannot complete the shearing operation, thus determining that the shearing operation has failed. The second preset value is the pressure value corresponding to the shearing blade 11 when drive unit 2 reaches its limit. The second preset value can be calculated using simulation software or obtained from multiple actual test data. The second preset value is greater than the first preset value. The second preset time can be the complete time required for the shearing device to cut one object, and can be between 3 and 10 seconds; no specific limit is imposed here.

[0046] When the control unit receives a feedback signal and the real-time pressure value is zero, it determines that drive unit 2 is operating under no-load. When shearing unit 1 has no material to shear, the real-time pressure value is zero, and based on the feedback signal, it determines that shearing unit 1 is closed; thus, it is determined that drive unit 2 is operating under no-load.

[0047] In some optional embodiments, the shearing device further includes a display unit 5, which is connected to the control unit and is used to display the status of the shearing unit 1 and the workpiece to be sheared, assisting the operator in knowing the real-time status of the shearing operation. The display unit 5 may be a display screen.

[0048] In some optional embodiments, the shearing device further includes a starting unit communicatively connected to the control unit, which is used to move the drive unit 2. The control unit sends a starting signal to the starting unit based on a starting command, causing the drive unit 2 to move. Operators can remotely control the drive unit 2 via the control unit, enabling remote operation of the shearing device and improving the safety of the shearing operation.

[0049] During the research and development process, the applicant discovered that when the power of the shearing device is exhausted during use, the shearing unit 1 is in the closed state just after shearing. After the operator replaces the battery, the shearing unit 1 is in the state before the power is cut off. If the control unit receives the start command and controls the drive unit 2 to start, the shearing unit 1 will continue to operate. The shearing unit 1 will rotate excessively in a short period of time, which can easily cause damage to the shearing unit 1.

[0050] To address the above issues, when the control unit receives a start signal, it determines whether a feedback signal has been received. Based on the reception status of the feedback signal, it then decides whether to send a start signal to the start unit. Before starting the drive unit 2, the control unit determines whether a feedback signal has been received and, based on the feedback signal, determines the current state of the shearing unit 1 and the drive unit 2. Based on the determination result, it decides whether to send a start signal, which can improve the safety of the shearing device.

[0051] In some optional embodiments, the shearing device further includes a reset unit communicatively connected to the control unit. The reset unit resets the drive unit 2 to its initial position. When the control unit receives a start command and a feedback signal, it determines that the shearing unit 1 is in a closed state. The control unit then sends a reset signal to the reset unit to reset the drive unit 2, thus opening the shearing device. The open and closed states of the shearing unit 1 can be displayed on the display unit 5 to facilitate operation in case of accidental operation. Based on a second start command, a start signal is sent to the start unit to activate the drive unit 2 and initiate the shearing unit 1.

[0052] When the control unit receives a start command but does not receive a feedback signal, it sends a start signal to the drive unit 2. Even without a feedback signal, the shearing unit 1 remains open, and the drive unit 2 operates without over-rotation, preventing damage to the shearing unit 1. As the drive unit 2 moves, it presses against the trigger switch 3, sending a feedback signal. Upon receiving this feedback signal, the control unit can send a reset signal to the drive unit 2, resetting it and returning the shearing unit 1 to the open state.

[0053] In some alternative embodiments, the drive unit 2 can be a linear drive cylinder, in which case the preset stroke is the displacement of the piston of the linear drive cylinder from the initial position along the axial direction during the process of the shear unit 1 changing from the open state to the closed state.

[0054] In some alternative embodiments, the drive unit 2 may have a rotation output end, in which case the preset stroke is the rotation angle corresponding to the rotation output end during the process of the shearing unit 1 changing from the open state to the closed state.

[0055] In some alternative embodiments, the control unit can be communicatively connected to the drive unit 2 and can control the operation and reset of the drive unit 2. After receiving a feedback signal, the control unit can control the drive unit 2 to switch from operation to reset. At this time, after the shearing unit 1 is closed, the drive unit 2 is reset, and the shearing unit 1 switches from closed to open.

[0056] Alternatively, after receiving the feedback signal, the control unit can control the drive unit 2 to run for a third preset time and then reset. To address the wear and tear of the shearing unit 1 due to long-term use, after the drive unit 2 presses the trigger switch 3 to send a feedback signal, it can continue running the drive unit 2 for a third preset time. This can compensate for the wear of the shearing unit 1 and the structural design of the shearing blade 11, ensuring that the shearing unit 1 cuts the object effectively. The third preset time can be determined based on the wear level of the shearing blade 11 or by calculation of its structure. Depending on the wear level or structure of the shearing blade 11, the third preset time is not specifically limited here.

[0057] like Figures 4 to 6 As shown in the illustration, this embodiment provides a shearing method applied in the above-described shearing device, which includes a shearing unit 1, a driving unit 2, a trigger switch 3, and a control unit. The shearing method includes: Start drive unit 2, which drives shear unit 1 to operate; shear unit 1 gradually changes from open to closed.

[0058] The drive unit 2 moves from the initial position until the pressure-contact trigger switch 3 sends a feedback signal; when the drive unit 2 moves to the position of the pressure-contact trigger switch 3, the shear unit 1 closes.

[0059] The control unit determines the operating status of shearing unit 1 based on the received feedback signals. If no feedback signal is received within the stored time period, it determines that shearing unit 1 is closing and in the shearing state. If a feedback signal is received, it determines that shearing unit 1 has closed and the workpiece has been cut. If no feedback signal is received beyond the stored time period, it determines that shearing unit 1 has operated for an extended period, and the shearing operation has failed.

[0060] In some optional embodiments, to prevent the drive unit 2 from operating under extreme conditions for extended periods, thus affecting its service life, a protection mechanism for the drive unit 2 is provided. The shearing unit 1 includes two shearing blades 11 and a pressure sensor. The pressure sensor detects the real-time pressure value on either shearing blade 11 and is communicatively connected to the control unit, which stores the extreme pressure value. After starting the drive unit 2 and driving the shearing unit 1 to operate, the following steps are taken: The control unit reads the real-time pressure value emitted by the pressure sensor; the control unit receives the real-time pressure value and then reads it.

[0061] The real-time pressure value is compared with the ultimate pressure value; the control unit is equipped with a comparison module, which stores the ultimate pressure value, and the comparison module compares the ultimate pressure value with the read real-time pressure value.

[0062] The control unit resets the drive unit 2 based on the difference between the real-time pressure value and the ultimate pressure value being within a preset range. The ultimate pressure value is the pressure detected by the pressure sensor on the shearing blade 11 when the drive unit 2 is in its extreme operating state. If the drive unit 2 has reached its ultimate state during shearing operations and operates at this extreme state for an extended period, it will accelerate the aging of the drive unit 2 and significantly shorten its service life. The control unit determines that the difference between the real-time pressure value and the ultimate pressure value is within a preset range; if so, the drive unit 2 has reached its extreme operating state, and the control unit resets the drive unit 2 to prevent prolonged operation and ensure its service life. Furthermore, if the drive unit 2 reaches its ultimate state but has not yet cut the object, the volume or hardness of the object exceeds the tolerance range of both the drive unit 2 and the shearing unit 1. Even if the drive unit 2 maintains its extreme operating state, it will be unable to cut the object. In this case, resetting the drive unit 2 serves as a protection mechanism. Optionally, a fourth preset time can be stored in the comparison module. The comparison module compares the difference between the real-time pressure value and the ultimate pressure value. If the difference is within the preset range and the above state has lasted for more than the fourth preset time, it is determined that the shearing material cannot be cut. This allows for accurate judgment of shearing materials that can only be cut when the drive unit is in the ultimate state.

[0063] In some optional implementations, before activating drive unit 2 and driving shear unit 1 to operate, the following is included: The control unit determines whether a feedback signal has been received. If a feedback signal is received, it first controls the drive unit 2 to reset, and then controls the drive unit 2 to start based on the next start command. Based on the received feedback signal, the control unit can determine whether the shearing unit 1 is in a closed state. If the drive unit 2 is running in this state, it will damage the shearing unit 1. In this case, the control unit first controls the drive unit 2 to reset, which facilitates the next shearing operation and also protects the shearing unit 1.

[0064] Since no feedback signal was received, the control drive unit 2 was started. At this time, the shearing unit 1 was not closed, the drive unit 2 was running, and the shearing unit 1 could continue to close until it was fully closed, so that the object to be sheared could be cut and the shearing operation could be completed.

[0065] In some optional embodiments, the shearing unit 1 includes two shearing blades 11, wherein the driving unit 2 moves from an initial position until the trigger switch 3 sends a feedback signal, and the determination of the position of the trigger switch 3 includes: Based on the rotation angle of the two shearing blades 11 during the process of shearing unit 1 changing from a fully open state to a fully closed state, the preset stroke of the drive unit 2 is determined.

[0066] In response to the determination of the position of shearing unit 1, the initial position of drive unit 2 is determined based on the position of shearing unit 1 and the preset stroke. The applicant can determine the position of shearing unit 1. Given that the position of shearing unit 1 is determined and the preset stroke is known, the initial position of drive unit 2 must be greater than or equal to the preset stroke to ensure that shearing unit 1 can fully close and the workpiece is cut. Based on these conditions, the initial position of drive unit 2 can be determined. When drive unit 2 is a linear drive cylinder, the initial position of the piston in the linear drive cylinder can be determined. The full stroke that the drive unit can move must be greater than or equal to the preset stroke.

[0067] The position of the trigger switch 3 is determined based on the initial position of the drive unit 2 and the preset stroke. Taking the initial position of the drive unit 2 as the starting point, and based on the standard that the trigger switch 3 is flush with the end of the drive unit 2 near the shearing unit 1 after completing the preset stroke, the position of the trigger switch 3 can be determined.

[0068] In some alternative embodiments, the drive unit 2 is connected to the shearing unit 1 via the transmission member 4, wherein determining the preset stroke includes: Based on the rotation angle of the shearing blade 11, the change data of the transmission component 4 is determined. The transmission component 4 connects the drive unit 2 and the shearing unit 1. During the process of the shearing unit 1 changing from the open state to the closed state, the change value of the rotation angle of the shearing blade 11 can be used to deduce the change data of the transmission component 4.

[0069] Based on the change data of transmission component 4 and the transmission ratio between transmission component 4 and drive unit 2, the preset stroke is determined.

[0070] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A shearing device, characterized in that, include: Shearing unit, drive unit, trigger switch, and control unit; The driving unit is connected to the shearing unit and is used to drive the shearing unit to operate; The trigger switch is located between the drive unit and the shearing unit. The trigger switch is used to send a feedback signal after the drive unit is pressed during the movement toward the shearing unit. The control unit is communicatively connected to the trigger switch and is used to determine the motion state of the shearing unit based on the received feedback signal. The position of the trigger switch can be adjusted along the movement direction of the drive unit.

2. The shearing device according to claim 1, characterized in that, The travel distance from the initial position to the closed state of the shearing unit is the preset travel distance, which is less than or equal to the total travel distance of the drive unit. The position of the trigger switch along the direction of movement of the drive unit is determined according to the preset stroke, and the trigger switch is flush with the end of the drive unit near the shearing unit when the preset stroke is completed.

3. The shearing device according to claim 2, characterized in that, The shearing unit includes two shearing blades, and the driving unit is connected to the shearing unit via a transmission component; The preset stroke is determined based on the target parameters of the shearing unit and the transmission ratio between the drive unit and the transmission component.

4. The shearing device according to claim 3, characterized in that, The target parameters include the rotation angle of the shearing unit when it changes from an open state to a closed state; Based on the rotation angle of the shearing blade, determine the change data of the transmission component; Based on the changing data and the transmission ratio, the preset stroke is determined.

5. The shearing device according to claim 1, characterized in that, When the drive unit presses against the trigger switch, the trigger switch can change its spatial position to avoid the drive unit, so that the drive unit can continue to move for a first preset time before stopping or resetting.

6. The shearing device according to claim 5, characterized in that, The control unit is communicatively connected to the drive unit and is used to control the drive unit to reset based on the received feedback signal and by issuing a reset signal. The control unit stores data on different materials and a mapping table between different materials and the first preset time; The control unit is used to, based on the confirmed metal material and the mapping table, transmit the reset signal after receiving the feedback signal, thereby resetting the drive unit.

7. The shearing device according to claim 1, characterized in that, The shearing unit includes two shearing blades and a pressure sensor; The pressure sensor is installed on any of the shearing blades to detect the real-time pressure value on any of the shearing blades, and is communicatively connected to the control unit to transmit the detected real-time pressure value to the control unit. The control unit is used to read the real-time pressure value and, based on the real-time pressure value, determine whether there is a shearing object between the two shearing blades.

8. The shearing device according to claim 7, characterized in that, The control unit is communicatively connected to the drive unit and is used to control the working state of the drive unit; The control unit is used to determine the state of the shearing unit and the sheared material based on the working state of the drive unit, the real-time pressure value, and the feedback signal.

9. The shearing device according to claim 8, characterized in that, The working states of the drive unit include running state and reset state; the control unit stores a first preset value, a second preset value, and a second preset time. The control unit is used to control the drive unit to be in operation, and when the real-time pressure value reaches the first preset value, it determines that the shearing unit is in shearing mode; the first preset value is greater than zero. The control unit determines that the material being cut has been cut and the cutting is successful based on the fact that the real-time pressure value is greater than the first preset value and the feedback signal is received. The control unit determines that the shearing operation has failed based on the fact that the real-time pressure value has reached the second preset value and no feedback signal has been received after the second preset time. The control unit determines that the drive unit is running under no-load based on reading the real-time pressure value as zero and receiving the feedback signal.

10. The shearing device according to claim 1, characterized in that, The shearing device further includes a starting unit that is communicatively connected to the control unit, the starting unit being used to move the drive unit; The control unit is used to send a start signal to the start unit based on a start command, so that the drive unit moves; When the control unit receives the start command, the control unit determines whether it has received the feedback signal, and based on the reception status of the feedback signal, determines whether to send a start signal to the start unit.

11. The shearing device according to claim 10, characterized in that, The shearing device further includes a reset unit that is communicatively connected to the control unit, the reset unit being used to reset the drive unit to its initial position; When the control unit receives the start command and the feedback signal, the control unit sends a reset signal to the reset unit to reset the drive unit; When the control unit receives the start command but does not receive the feedback signal, the control unit sends the start signal to the start unit.

12. The shearing device according to claim 2, characterized in that, The driving unit is a linear drive cylinder, and the preset stroke is the displacement of the piston of the linear drive cylinder from its initial position along the axis during the process of the shearing unit changing from the open state to the closed state. Alternatively, the driving unit may have a rotary output end, and the preset stroke may be the rotation angle of the rotary output end during the process of the shearing unit changing from an open state to a closed state.

13. The shearing device according to claim 1, characterized in that, The control unit is communicatively connected to the drive unit and is used to control the operation and reset of the drive unit; The control unit is used to control the drive unit to switch from running to resetting based on the received feedback signal; Alternatively, the control unit may, based on the received feedback signal, control the drive unit to run for a third preset time and then switch to a reset.

14. A cutting method, characterized in that, Applied to the shearing device as described in any one of claims 1-13, the shearing device comprising a shearing unit, a driving unit, a trigger switch, and a control unit, the shearing method comprising: The driving unit is activated to drive the shearing unit to operate; The drive unit moves from its initial position until it presses against the trigger switch and sends a feedback signal. The control unit determines the operating status of the shearing unit based on the received feedback signal.

15. The shearing method according to claim 14, characterized in that, The shearing unit includes two shearing blades and a pressure sensor. The pressure sensor is used to detect the real-time pressure value on either shearing blade and is communicatively connected to the control unit. The control unit stores the limit pressure value; The process of activating the driving unit to drive the shearing unit to operate includes: The control unit reads the real-time pressure value emitted by the pressure sensor; Compare the real-time pressure value with the ultimate pressure value; Based on the fact that the difference between the real-time pressure value and the ultimate pressure value is within a preset range, the drive unit is controlled to reset.

16. The shearing method according to claim 14, characterized in that, The startup drive unit drives the shearing unit to operate, and the preceding steps include: The control unit determines whether it has received the feedback signal. If the feedback signal is received, it controls the drive unit to reset. If the start command is received again, it controls the drive unit to start. The drive unit is started if no feedback signal is received.

17. The shearing method according to claim 14, characterized in that, The shearing unit includes two shearing blades; The determination of the position of the trigger switch during the movement of the drive unit from its initial position until it presses against the trigger switch and sends a feedback signal includes: Based on the rotation angle of the shearing blade during the process of the shearing unit changing from a fully open state to a fully closed state, the preset stroke of the drive unit is determined. In response to the determination of the shearing unit position, the initial position of the driving unit is determined based on the shearing unit position and the preset stroke; The position of the trigger switch is determined based on the initial position of the drive unit and the preset stroke.

18. The shearing method according to claim 17, characterized in that, The drive unit is connected to the shearing unit via a transmission component, and the determination of the preset stroke includes: Based on the rotation angle of the shearing blade, determine the change data of the transmission component; The preset stroke is determined based on the change data of the transmission component and the transmission ratio between the transmission component and the drive unit.

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