Anti-pinch insulation tool capable of quickly opening cover plate

Abstract

The invention discloses an anti-pinch insulation tool for quickly opening a cover plate. The invention relates to the field of electric power tools, and discloses a clamping part, a synchronous adjusting mechanism, a load sensing unit and a force adjusting unit, the clamping part comprises a first clamping arm and a second clamping arm which are crosswise hinged through a hinge shaft, and the lower end of the first clamping arm and the lower end of the second clamping arm are respectively provided with a clamping part used for clamping the edge of a cover plate; the synchronous adjusting mechanism is arranged at the hinge shaft and is used for driving the clamping parts of the first clamping arm and the second clamping arm to synchronously move towards each other or away from each other so as to adjust the clamping width; the load sensing unit is used for acquiring dynamic load information of the first clamping arm and the second clamping arm in the clamping process in real time; the force adjusting unit is used for applying adjustable compensation acting force to at least one clamping arm. The method has the beneficial effect that the technical span from passive mechanical synchronization to active force field balance is realized.

Description

Technical Field

[0001] This invention relates to the field of power tools, and more specifically to a quick-opening cover plate anti-pinch insulating tool. Background Technology

[0002] In substations, communication base stations, and other similar locations, opening cable trench or equipment well covers is a routine but tedious task. Currently, whether done manually, with simple tools like crowbars, or with the aid of heavy machinery, the operation essentially relies on single-point or asynchronous two-point force application. This makes it impossible to precisely and synchronously control the position and opening / closing of the clamping points on both sides when holding the cover. Operators often need to repeatedly adjust and test, which is not only time-consuming and laborious, but also prone to causing the cover to suddenly tilt or slip due to uneven force on both sides, potentially leading to tool damage and personal injury.

[0003] Manual and simple tool methods are completely incapable of achieving synchronous clamping, relying on experience and luck, resulting in low efficiency and danger. Mechanical lifting methods, while enabling multi-point lifting, involve bulky equipment, complex operation, and cannot be used in confined spaces. Furthermore, their lifting modes fundamentally differ from the requirements of clamping operations, making rapid and precise width adjustment and alignment difficult. Therefore, the field has long lacked a basic tool that is simple in structure, easy to operate, and capable of synchronous, precise, and rapid opening and closing adjustment of both clamping arms.

[0004] Having addressed the fundamental clamping issues mentioned above, modern power system maintenance places a series of higher-level, complex demands on cover opening tools, including safe insulation in energized environments, adaptability to covers of different sizes and shapes, stability under high loads, and protection of both the cover and the tool itself. However, existing solutions suffer from fundamental flaws in their basic clamping structures, making it difficult to systematically meet these requirements. Therefore, there is an urgent need for a specialized tool that innovates at the fundamental structural level and integrates multiple safety safeguards and performance enhancements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the current tools cause hidden load imbalance due to uneven cover plate condition (such as unilateral corrosion or deformation) or uneven force applied during operation, resulting in mechanical synchronization failure, tool slippage or sudden unloading and safety risks. The purpose is to provide a quick-opening cover plate anti-pinch insulating tool to achieve a technical leap from passive mechanical synchronization to active force field balance.

[0006] This invention is achieved through the following technical solution:

[0007] A quick-opening cover plate anti-pinch insulating tool includes a clamping part, a synchronous adjustment mechanism, a load sensing unit, and a force adjustment unit. The clamping part includes a first clamping arm and a second clamping arm that are cross-hinged by a hinge shaft. The lower ends of the first and second clamping arms are respectively provided with clamping parts for clamping the edge of the cover plate. The synchronous adjustment mechanism is located at the hinge shaft and is used to drive the clamping parts of the first and second clamping arms to move synchronously towards or away from each other to adjust the clamping width. The load sensing unit is used to acquire dynamic load information of the first and second clamping arms in real time during the clamping process. The force adjustment unit is used to apply an adjustable compensating force to at least one of the clamping arms.

[0008] The beneficial effects of this invention are that by integrating load sensing and active force adjustment mechanisms, an intelligent clamping system capable of coping with implicit load imbalance is constructed. Specifically, the load sensing unit monitors the force difference between the two clamping arms in real time, accurately identifying the load imbalance caused by unilateral corrosion of the cover plate or uneven force application during operation. The force adjustment unit applies a compensating force to the side with a lighter load based on the sensing information, dynamically balancing the clamping torque on both sides. This allows the mechanical synchronization mechanism to maintain effective operation under complex working conditions, not only preventing tool failure due to unilateral slippage, but also eliminating the safety risks caused by sudden tool unloading and bouncing by actively offsetting sudden load changes. This achieves a technological leap from passive mechanical synchronization to active force field balance, and enables rapid, accurate, and intuitive adjustment of the clamping width, significantly improving work efficiency.

[0009] In some embodiments, both the first and second clamping arms include an outer clamping arm tube and a clamping rod. The two outer clamping arm tubes are cross-hinged via the hinge shaft. Each clamping rod is slidably connected to the inner side of the corresponding outer clamping arm tube. The clamping part is connected to the end of the clamping rod away from the outer clamping arm tube to adjust the clamping width. By configuring the clamping arm to include a fixed outer tube and a slidable clamping rod, synchronous adjustment is achieved while significantly improving the modularity and maintainability of the structure. The independent movement of the clamping rod allows for more precise and linear adjustment of the clamping point position, providing a precise mechanical basis for adapting to cover plates of different sizes. It also facilitates the replacement or repair of easily damaged clamping parts, improving the durability and economy of the tool.

[0010] In some embodiments, the synchronous adjustment mechanism includes a gear and a second gear that fit into the hinge shaft through a shaft hole. Both clamping rods are connected to racks, which are arranged along the length direction of the corresponding clamping rod. The gear and the second gear mesh with the corresponding racks. Through the rigid meshing transmission of the double gears and double-sided racks, the unavoidable bilateral movement deviations in manual operation are eliminated, ensuring high precision and high repeatability of the clamping width adjustment.

[0011] In some embodiments, the clamping rod is semi-circular in shape, with two side edges extending along its length and located at both ends of the virtual diameter of the clamping rod's cross-section. Two sliding grooves are provided on the inner wall of the outer tube of the clamping arm, extending along the corresponding length of the outer tube. The two side edges are slidably connected within their respective sliding grooves. By setting the clamping rod as a semi-circular rod and providing slidable engagement between the double side edges and the sliding grooves, lightweight design is achieved while providing sufficient torsional and bending stiffness. The double-sliding groove guide system ensures that the clamping rod maintains a strictly linear motion even under high lifting forces, preventing synchronous failure due to rod deformation or displacement, and enhancing the tool's structural stability and operational predictability under high loads.

[0012] In some embodiments, the clamping rod has multiple weight-reducing networks extending along its length inside its body, forming an internal cavity network. By setting an internal cavity network inside the clamping rod, significant weight reduction of the tool is achieved while ensuring the structural strength of key areas. This not only directly reduces the operator's labor intensity and improves work efficiency, but also, by optimizing the force flow transmission path, suppresses fatigue cracks from the structural source and extends the tool's service life under high-intensity use.

[0013] In some embodiments, the weight-reducing network is polygonal in cross-section perpendicular to its extension direction, and the partition walls between adjacent cavities are arc-shaped surfaces convex toward the interior of the cavities. By setting the weight-reducing network as a combination of polygonal cavities and arc-shaped partitions, the mechanical performance and reliability of the lightweight structure are further improved. The arc-shaped partitions replace plate load-bearing with shell load-bearing, significantly improving buckling resistance. Furthermore, the smooth node transitions of the arc-shaped surfaces eliminate stress concentration, making the internal force flow transmission smoother, thereby achieving higher overall stiffness and load-bearing capacity under the same weight.

[0014] In some embodiments, a localized reinforcement portion is formed on the clamping rod at the connection structure corresponding to the clamping portion or the hinge shaft. The weight-reducing network within the localized reinforcement portion is filled or replaced by a solid material or a composite material with a higher modulus. By filling stress concentration areas (such as connections) with material, an optimal balance between performance and weight is achieved. Without significantly increasing the overall weight, the weakest link is reinforced at specific points, ensuring that the tool improves the safety, reliability, and fatigue life of the connection structure during long-term, repeated high-load operations.

[0015] In some embodiments, the force adjustment unit includes two magnetorheological dampers. The cylinder end of the magnetorheological damper is connected to the upper end of the outer tube of the clamping arm, and the free end of its piston rod is connected to the end of the corresponding clamping rod away from the clamping part, forming a double-sided independent deviation compensation structure. Based on mechanical synchronization, a real-time dynamic compensation system based on intelligent fluid is set up. When the load sensing unit detects an imbalance in the clamping forces on both sides, the control unit can adjust the magnetic field strength of the corresponding magnetorheological damper in real time, so that its piston rod outputs precise and controllable compensation damping, so that the compensation force acts directly on the force path of the clamping rod. This can instantly offset the torque deviation caused by unilateral corrosion of the cover plate or uneven force application during operation, forming a second active stabilization barrier on the basis of the mechanical synchronization mechanism. This allows the system to achieve a smooth transition from slight compensation to complete locking, which not only effectively prevents tool slippage and failure, but also suppresses the impact rebound during sudden unloading, upgrading traditional mechanical tools into an intelligent safety system with tactile feedback and instantaneous self-correction capabilities.

[0016] In some embodiments, the clamping portion includes a metal substrate and a silicone layer covering the clamping surface of the metal substrate. The surface of the metal substrate is provided with a composite surface texture structure, which includes a macroscopic interlocking texture and a microscopic directional groove array formed on the surface of the macroscopic interlocking texture protrusions. The macroscopic interlocking texture consists of staggered ridges, the cross-section of which is dovetail-shaped or wavy, and the angle between the sidewall of the ridge and the substrate surface is 60° to 75°. Through the composite design of macroscopic mechanical interlocking texture and microscopic anisotropic grooves, the dovetail-shaped ridges ensure extreme adhesion reliability of the silicone layer, preventing detachment, and the anisotropic groove array gives the clamping surface directional friction characteristics, providing maximum resistance in the lifting direction to prevent slippage, and relatively smooth in the insertion direction to protect the cover plate, thus achieving non-destructive and highly reliable clamping of cover plates of different materials and shapes (including round).

[0017] In some embodiments, the angle between the groove extension direction in the micro-oriented groove array and the reference profile edge on the clamping portion parallel to the length direction of the clamping rod is 70° to 110°. By precisely defining the direction of the micro-grooves to form an angle of 70°-110° with the reference edge, this specific angle range is optimized to ensure that, under most actual lifting postures, the grooves can most effectively resist the tangential slippage of the cover plate, thereby pushing the anti-slip performance of the clamping to its theoretical limit, while avoiding scratches on the cover plate surface caused by improper groove orientation.

[0018] In some embodiments, a control module is also included. The control module is communicatively connected to the load sensing unit and the force adjustment unit. Based on the dynamic load information obtained by the load sensing unit, the control module calculates the load difference between the first clamping arm and the second clamping arm. When the load difference exceeds a preset threshold, the control module controls the force adjustment unit to output a corresponding compensating force to offset the uneven load between the first clamping arm and the second clamping arm. By calculating the load difference between the two clamping arms in real time and comparing it with the preset threshold, the module achieves quantitative identification and accurate judgment of implicit load imbalance. During operation, when the imbalance exceeds the safe range, the module instantly outputs a precise control command to the force adjustment unit, driving it to generate a compensating force that matches the load difference. This enables the tool to actively identify and dynamically offset torque deviations caused by unilateral corrosion of the cover plate or uneven force application. This not only solves the failure risk of mechanical synchronization mechanisms under complex working conditions, but also effectively prevents impact hazards caused by tool slippage and sudden unloading through an intelligent feedforward compensation mechanism, transforming traditional passive tools into active safety devices with real-time risk intervention capabilities.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. The load sensing unit monitors the force difference between the two clamping arms in real time, accurately identifying the load imbalance caused by rust on one side of the cover plate or uneven force applied during operation; the force adjustment unit applies a compensating force to the side with a lighter load based on the sensing information, dynamically balancing the clamping torque on both sides, so that the mechanical synchronization mechanism can still work effectively under complex working conditions. This not only prevents tool failure caused by slippage on one side, but also eliminates the safety risks caused by sudden unloading and bouncing of the tool by actively offsetting sudden load changes.

[0021] 2. Through an anisotropic groove array, the clamping surface has directional friction characteristics, providing maximum resistance in the lifting direction to prevent slippage, and relatively smooth in the insertion direction to protect the cover plate, achieving non-destructive and highly reliable clamping of cover plates of different materials and shapes (including round ones).

[0022] 3. By precisely defining the direction of the micro-groove to form an angle of 70°-110° with the reference edge, this specific angle range has been optimized to ensure that the groove can most effectively resist the tangential slippage of the cover plate under most actual lifting postures, thereby pushing the anti-slip performance of the clamping to the theoretical limit, while avoiding scratches on the surface of the cover plate caused by improper groove direction. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0024] Figure 1 This is a structural diagram of the present invention;

[0025] Figure 2 This is a partial structural diagram of the present invention;

[0026] Figure 3 This is a cross-sectional view of the clamping rod in this invention;

[0027] Figure 4 This is a structural diagram of the positioning component in this invention;

[0028] Figure 5 In this invention Figure 1 An enlarged view of part K;

[0029] Figure 6 In this invention Figure 2 An enlarged view of part K1.

[0030] The attached diagram shows the markings and corresponding component names:

[0031] First clamping arm 10, second clamping arm 11, clamping arm outer tube 101, hinge shaft 102, main positioning hole 1021, limiting hole 1022, limiting groove 1023, gear 103, rack 105, clamping rod 106, side edge 1061, weight reduction network 1062, magnetorheological damper 107, clamping plate 108, silicone layer 109, handle 110, handle glove 111, positioning component 112, positioning post 1121. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0033] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] In the description of this invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0035] The terms "first," "second," etc., used in this invention are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

[0036] Example

[0037] like Figures 1-6 As shown, this embodiment provides a quick-opening cover plate anti-pinch insulating tool, including a clamping part and a synchronous adjustment mechanism. The clamping part includes a first clamping arm 10 and a second clamping arm 11 that are cross-hinged by a hinge shaft 102. The lower ends of the first clamping arm 10 and the second clamping arm 11 are respectively provided with clamping parts for clamping the edge of the cover plate. The synchronous adjustment mechanism is located at the hinge shaft 102. The synchronous adjustment mechanism is used to drive the clamping parts of the first clamping arm 10 and the second clamping arm 11 to move synchronously towards or away from each other to adjust the clamping width.

[0038] See Figure 1 and Figure 2The first clamping arm 10 and the second clamping arm 11 each include a clamping arm outer tube 101 and a clamping rod 106. The two clamping arm outer tubes 101 are cross-hinged through the hinge shaft 102. The clamping rods 106 are slidably connected to the inner side of the corresponding clamping arm outer tube 101. The clamping part is connected to the end of the clamping rod 106 away from the clamping arm outer tube 101 to adjust the clamping width. By setting the clamping arm to include a fixed outer tube and a slidable clamping rod 106, synchronous adjustment is achieved while significantly improving the modularity and maintainability of the structure. The independent movement of the clamping rod 106 makes the adjustment of the clamping point position more precise and linear, providing a precise mechanical basis for adapting to cover plates of different sizes. At the same time, it is convenient to replace or repair the easily damaged clamping part, improving the durability and economy of the tool.

[0039] See Figures 1-4 The synchronous adjustment mechanism includes a gear 103 and a second gear 103 that fit into the hinge shaft 102. Each of the two clamping rods 106 is connected to a rack 105, which is arranged along the length of the corresponding clamping rod 106. The gear 103 and the second gear 103 mesh with the corresponding rack 105. Through the rigid meshing transmission of the double gears 103 and the double-sided racks 105, the unavoidable bilateral movement deviations in manual operation are eliminated, ensuring high precision and high repeatability of the clamping width adjustment.

[0040] See Figure 3 The clamping rod 106 is semi-circular in shape and has two side edges 1061 extending along its length and located at both ends of the virtual diameter of its cross-section. Two sliding grooves are provided on the inner wall of the clamping arm outer tube 101, extending along the corresponding length of the clamping arm outer tube 101. The two side edges 1061 are slidably connected within their respective grooves. By setting the clamping rod 106 as a semi-circular rod and providing slidable engagement between the double side edges 1061 and the sliding grooves, lightweight design is achieved while providing sufficient torsional and bending stiffness. The double-sliding groove guide system ensures that the clamping rod 106 remains strictly linear under high lifting force, preventing synchronous failure due to rod deformation or displacement, and enhancing the tool's structural stability and operational predictability under high loads.

[0041] See Figures 1-3The clamping rod 106 has multiple weight-reducing networks 1062 extending along its length inside its body, forming an internal cavity network. By setting an internal cavity network inside the clamping rod 106, significant weight reduction of the tool is achieved while ensuring the structural strength of key areas. This not only directly reduces the operator's labor intensity and improves work efficiency, but also, by optimizing the force flow transmission path, suppresses fatigue cracks from the structural source and extends the tool's service life under high-intensity use.

[0042] See Figures 1-3 The weight-reducing network 1062 has a polygonal cross-section perpendicular to its extension direction, and the partition walls between adjacent cavities are arc-shaped surfaces bulging towards the interior of the cavities. By setting the weight-reducing network 1062 as a combination of polygonal cavities and arc-shaped partitions, the mechanical performance and reliability of the lightweight structure are further improved. The arc-shaped partitions replace plate load-bearing with shell load-bearing, significantly improving buckling resistance. Furthermore, the smooth node transitions of the arc-shaped surfaces eliminate stress concentration, making the internal force flow transmission smoother, thereby achieving higher overall stiffness and load-bearing capacity under the same weight.

[0043] See Figures 1-3 A localized reinforcement portion is formed on the clamping rod 106 at the connection structure corresponding to the clamping part or the hinge shaft 102. The weight-reducing network 1062 within the localized reinforcement portion is filled or replaced by a solid material or a composite material with a higher modulus. By filling the stress concentration area (such as the connection point) with material, an optimal balance between performance and weight is achieved. Without significantly increasing the overall weight, the weakest link is reinforced at specific points, ensuring that the tool can improve the safety, reliability, and fatigue life of the connection structure during long-term, repeated high-load operations.

[0044] See Figures 1-6 The force adjustment unit includes two magnetorheological dampers 107. The cylinder end of the magnetorheological damper 107 is connected to the upper end of the outer tube 101 of the clamping arm, and the free end of its piston rod is connected to the end of the corresponding clamping rod 106 away from the clamping part, forming a double-sided independent deviation compensation structure. Based on mechanical synchronization, a real-time dynamic compensation system based on intelligent fluid is set up. The magnetorheological damper 107 can respond instantaneously and offset the slight asynchrony and impact load caused by uneven ground, cover plate jamming, or micro-movement of operation. Thus, during the dynamic process of high-load lifting, the cover plate is always kept stable and the tool is kept stable, effectively preventing slippage accidents caused by instantaneous off-center load.

[0045] See Figures 1-2The clamping part includes a metal substrate and a silicone layer 109 covering the clamping surface of the metal substrate. The surface of the metal substrate is provided with a composite surface texture structure, which includes a macroscopic interlocking texture and a microscopic directional groove array formed on the surface of the macroscopic interlocking texture protrusions. The macroscopic interlocking texture consists of staggered ridges, the cross-section of which is dovetail-shaped or wavy, and the angle between the sidewall of the ridge and the substrate surface is 60° to 75°. Through the composite design of macroscopic mechanical interlocking texture and microscopic anisotropic grooves, the dovetail-shaped ridges ensure the extreme adhesion reliability of the silicone layer 109, preventing it from falling off. The anisotropic groove array gives the clamping surface directional friction characteristics, providing maximum resistance in the lifting direction to prevent slippage, and relatively smooth in the insertion direction to protect the cover plate, thus achieving non-destructive and highly reliable clamping of cover plates of different materials and shapes (including round). The dovetail or wavy sidewalls of the macroscopic interlocking texture provide a mechanical anchoring effect for the silicone layer 109, preventing it from peeling off under shear force; the microscopic directional groove array forms an anisotropic micromorphology on the surface of the silicone layer 109, making its friction coefficient smaller in the direction parallel to the groove and significantly larger in the direction perpendicular to the groove, thereby providing maximum anti-slip resistance when lifting.

[0046] See Figures 1-2 The angle between the groove extension direction of the micro-oriented groove array and the reference contour edge on the clamping part, which is parallel to the length direction of the clamping rod 106, is 70° to 110°. By precisely defining the direction of the micro-grooves to form an angle of 70°-110° with the reference edge, this specific angle range is optimized to ensure that, under most actual lifting postures, the grooves can most effectively resist the tangential slippage of the cover plate, thereby pushing the anti-slip performance of the clamping to the theoretical limit, while avoiding scratches on the cover plate surface caused by improper groove orientation. The groove depth in the micro-oriented groove array is 10 micrometers to 100 micrometers, and the width is 10 micrometers to 50 micrometers.

[0047] See Figure 4 and Figure 5One end of the hinge shaft 102 is provided with a limiting hole 1022, and several limiting grooves 1023 are provided on the side wall of the limiting hole 1022. Several limiting holes 1022 are provided on the outer tube 101 of the clamping arm, which is connected to the end of the hinge shaft 102 that is provided with a main positioning hole 1021. The limiting holes 1022 are evenly distributed on the outer periphery of the hinge shaft 102. The system also includes a positioning component 112, which has a columnar positioning main post that mates with the main positioning hole 1021. Several limiting ridges are provided on the outer side of the positioning main post, which mate with the limiting groove 1023 to prevent the positioning main post from sliding radially relative to the hinge shaft 102. The positioning component 112 also includes two side arms, each with a positioning post 1121 that mates with the limiting hole 1022. The length of each positioning post 1121 is 4-5 cm shorter than the positioning main post, so that when the positioning post 1121 is located in the limiting hole 1022, it restricts the rotation of the hinge shaft 102. When the hinge shaft 102 needs to rotate, the positioning post 1121 is pulled out of the corresponding limiting hole 1022, while the positioning main post remains in the main positioning hole 1021. Rotating the positioning component causes the gear 103 to rotate, adjusting the clamping rod 106 to move up and down.

[0048] See Figure 1 and Figure 2 It also includes a handle 110 and a handle glove 111. The handle 110 is connected to the upper end of the first clamping arm 10 and the second clamping arm 11, respectively. The handle 110 is fitted with a silicone or rubber handle glove 111.

[0049] Specifically, it also includes a control module, which is communicatively connected to the load sensing unit and the force adjustment unit. Based on the dynamic load information obtained by the load sensing unit, the control module calculates the load difference between the first clamping arm 10 and the second clamping arm 11. When the load difference exceeds a preset threshold, the control module controls the force adjustment unit to output a corresponding compensating force to offset the uneven load between the first clamping arm 10 and the second clamping arm 11. By calculating the load difference between the two clamping arms in real time and comparing it with the preset threshold, the module achieves quantitative identification and accurate judgment of implicit load imbalance. During operation, when the imbalance is detected to exceed the safe range, the module instantly outputs a precise control command to the force adjustment unit, driving it to generate a compensating force that matches the load difference. This enables the tool to actively identify and dynamically offset torque deviations caused by unilateral corrosion of the cover plate or uneven force application during operation. This not only solves the failure risk of the mechanical synchronization mechanism under complex working conditions, but also effectively prevents the impact hazards caused by tool slippage and sudden unloading through an intelligent feedforward compensation mechanism, transforming the traditional passive tool into an active safety device with real-time risk intervention capabilities. The load sensing unit is a micro-strain gauge, which is respectively bonded to the clamping rod to detect the clamping force on both sides in real time; an inertial measurement unit (IMU) is located at the intersection of the handles to detect the tool's attitude angle and acceleration; and a control unit (such as a microprocessor) is connected to the force sensor and the IMU at its signal input terminal and to the electromagnetic coil of the magnetorheological damper at its signal output terminal.

[0050] The control unit is configured to execute the following closed-loop control process:

[0051] S1, Multi-source state sensing: Real-time reception of clamping force signals from the first force sensor and the second force sensor ( , ), and the tool attitude angle (θ) and lateral acceleration (a) signals from the inertial measurement unit (IMU).

[0052] S2, Instability Trend Determination: Based on the sensed signal, two types of determinations are performed in parallel:

[0053] S21, Load Imbalance Determination: Calculate the real-time clamping force difference. ,like Continuously exceeding the first preset threshold ( Reaching the first time ( If the load is unbalanced, then it is determined to be an imbalanced load.

[0054] S22, Determining Motion Instability: Calculating the Rate of Change of Attitude Angles ( ) and absolute value of lateral acceleration ( If any of them exceeds the corresponding second preset threshold ( or If the value is 0, it is considered motion instability.

[0055] S3, Intelligent Compensation Decision and Execution: The compensation mechanism is triggered when any of the above conditions for load imbalance or motion instability are met.

[0056] S31, Determine the compensation side: Comparison and The side with the smaller clamping force is designated as the load compensation side; and / or, in combination with The direction of the motion is determined by identifying the side that tends towards acceleration as the motion compensation side.

[0057] S32, Calculate the compensation amount: Based on amplitude and / or The rate is used to calculate the target compensation current using a preset algorithm (such as a lookup table method or a proportional-integral algorithm). ).

[0058] S33, Output Compensation: Outputs a signal to the electromagnetic coil of the magnetorheological damper corresponding to the compensation side. The corresponding control signal (such as a PWM signal) causes it to generate a damping force in the opposite direction to the instability trend.

[0059] S4, Dynamic Feedback and Termination: Continuous monitoring after output compensation. , and Once all monitored parameters have fallen below their respective safety thresholds and remained stable, the control unit gradually reduces the control current until it reaches zero, completing this compensation cycle.

[0060] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A quick-opening cover plate anti-pinch insulating tool, characterized in that, include: The clamping part includes a first clamping arm and a second clamping arm that are cross-hinged by a hinge shaft. The lower ends of the first clamping arm and the second clamping arm are respectively provided with clamping parts for clamping the edge of the cover plate. The first clamping arm and the second clamping arm both include a clamping arm outer tube and a clamping rod. The clamping rod has multiple weight-reducing networks extending along its length inside its rod body. A synchronous adjustment mechanism is provided at the hinge shaft. The synchronous adjustment mechanism is used to drive the clamping parts of the first clamping arm and the second clamping arm to move synchronously towards or away from each other in order to adjust the clamping width. A load sensing unit is used to acquire dynamic load information of the first clamping arm and the second clamping arm in real time during the clamping process. A force adjustment unit is provided for applying an adjustable compensating force to at least one of the clamping arms.

2. The quick-opening cover plate anti-pinch insulating tool according to claim 1, characterized in that, The two clamping arm outer tubes are cross-hinged through the hinge shaft, and the clamping rods are slidably connected to the inner side of the corresponding clamping arm outer tube. The clamping part is connected to the end of the clamping rod away from the clamping arm outer tube.

3. The quick-opening cover plate anti-pinch insulating tool according to claim 2, characterized in that, The synchronous adjustment mechanism includes a gear and a second gear that fit into the hinge shaft through a shaft hole. Both clamping rods are connected to racks, which are arranged along the length direction of the corresponding clamping rods. The gear and the second gear mesh with the corresponding racks, respectively.

4. The quick-opening cover plate anti-pinch insulating tool according to claim 3, characterized in that, The clamping rod is semi-circular in shape and has two side edges. The two side edges extend along the length of the clamping rod and are located at both ends of the virtual diameter of the clamping rod cross section. The inner wall of the outer tube of the clamping arm has two sliding grooves. The two sliding grooves extend along the length of the corresponding outer tube of the clamping arm, and the two side edges are slidably connected in the corresponding sliding grooves.

5. The quick-opening cover plate anti-pinch insulating tool according to claim 4, characterized in that, The weight reduction network is polygonal in cross-section perpendicular to its extension direction, and the partition wall between adjacent cavities is an arc-shaped surface that bulges toward the interior of the cavity.

6. The quick-opening cover plate anti-pinch insulating tool according to claim 5, characterized in that, A local reinforcement portion is formed on the clamping rod at the connection structure corresponding to the clamping part or the hinge shaft, and the weight reduction network in the local reinforcement portion is filled or replaced by a solid material or a composite material with a higher modulus.

7. The quick-opening cover plate anti-pinch insulating tool according to claim 2, characterized in that, The force adjustment unit includes two magnetorheological dampers. The cylinder end of the magnetorheological damper is connected to the upper end of the outer tube of the clamping arm, and the free end of its piston rod is connected to the end of the corresponding clamping rod away from the clamping part, forming a double-sided independent deviation compensation structure.

8. The quick-opening cover plate anti-pinch insulating tool according to claim 1, characterized in that, The clamping part includes a metal substrate and a silicone layer covering the clamping surface of the metal substrate. The surface of the metal substrate is provided with a composite surface texture structure, which includes a macroscopic interlocking texture and a microscopic oriented groove array formed on the surface of the macroscopic interlocking texture protrusions. The macroscopic interlocking texture consists of staggered ridges, the cross-section of which is dovetail-shaped or wavy, and the angle between the sidewall of the ridge and the substrate surface is 60° to 75°.

9. The quick-opening cover plate anti-pinch insulating tool according to claim 8, characterized in that, The angle between the groove extension direction in the micro-directional groove array and the reference profile edge on the clamping part that is parallel to the length direction of the clamping rod is 70° to 110°.

10. The quick-opening cover plate anti-pinch insulating tool according to any one of claims 1-9, characterized in that, It also includes a control module, which is communicatively connected to the load sensing unit and the force adjustment unit. Based on the dynamic load information obtained by the load sensing unit, the control module calculates the load difference between the first clamping arm and the second clamping arm. When the load difference exceeds a preset threshold, the control module controls the force adjustment unit to output a corresponding compensation force to offset the uneven load between the first clamping arm and the second clamping arm.

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