Intelligent multi-torque wrench

Abstract

The invention provides an intelligent multi-torque wrench, which relates to the technical field of mechanical manufacturing, and comprises a four-axis wrench, a three-axis wrench, a buckle and an intelligent handle, the four-axis wrench is detachably connected with the intelligent handle through a buckle, and the three-axis wrench is detachably connected with the intelligent handle through a buckle; the four-shaft wrench comprises a four-shaft core aligning contraction structure, a four-shaft coaxial transmission structure, a four-shaft fixing support and a screwdriver. The four-axis core alignment contraction structure is connected with the four-axis coaxial transmission structure through a four-axis fixing support, four guide rails are arranged on four arms of the four-axis fixing support, and a limiting stopper is movably connected to the guide rails and connected with a screwdriver; the intelligent handle comprises a motor, a torsion sensor and a battery, the four-axis / three-axis core aligning contraction structure drives the screwdrivers to accurately move along the guide rail, the locking function of the telescopic rod is combined, it is ensured that the multiple screwdrivers are adjustable in interval and synchronously rotate, and stress concentration is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical manufacturing, and more specifically, particularly relates to an intelligent multi-torque wrench. Background Art

[0002] The mechanical manufacturing and assembly industries are increasingly developing towards intelligence and modularization. At present, industries such as aerospace, mechanical manufacturing, and automotive manufacturing have increasingly higher requirements for the machining accuracy of machinery. The connection structures adopted by many machines urgently need more precise fixing methods, which have the functions of releasing stress and improving sealing performance. Currently, there is a lack of a device on the market that can be freely combined to adapt to most environments and can simultaneously perform multi-bolt fastening. The multi-torque wrench provides a solution to fill the needs of this industry.

[0003] Taking the assembly of an automotive engine as an example, traditional fastening measures face the problems of low efficiency and long locking cycles. More seriously, it is difficult for traditional fastening means to ensure the uniform force on all bolts, which may lead to poor sealing between the cylinder head and the cylinder block, resulting in the leakage of high-temperature and high-pressure gases in the combustion chamber and the decline of engine power. In addition, there is also the problem of stress concentration in traditional fastening methods, which may even cause deformation of the cylinder head.

[0004] At the same time, the design of the multi-torque wrench can adjust the number, layout, radius, etc. of the wrenches to adapt to most application scenarios, enhancing the adaptability to complex working conditions: for scenarios such as narrow spaces and multi-angle fastening, the multi-radius adjustment function can avoid tool interference problems and reduce operation risks. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an intelligent multi-torque wrench to solve the above problems.

[0006] An intelligent multi-torque wrench includes: a four-axis wrench, a three-axis wrench, a buckle, and an intelligent handle; the four-axis wrench is detachably connected to the intelligent handle through the buckle, and the three-axis wrench is detachably connected to the intelligent handle through the buckle; the four-axis wrench includes a four-axis centering and shrinking structure, a four-axis coaxial transmission structure, a four-axis fixed bracket, and a screwdriver; the four-axis centering and shrinking structure is connected to the four-axis coaxial transmission structure through the four-axis fixed bracket, four guide rails are provided on the four arms of the four-axis fixed bracket, a limiter is movably connected to the guide rails, and the limiter is connected to the screwdriver; the intelligent handle includes a motor, a torque sensor, and a battery, the motor drives the four-axis wrench or the three-axis wrench, and the torque sensor monitors the torque in real time and controls the output of the motor through feedback.

[0007] Preferably, the housing of the intelligent handle is provided with modular interfaces, which are compatible with the quick replacement of four-axis wrenches and three-axis wrenches through snap-fasteners. The four-axis centering and shrinking structure includes a four-axis central turntable and a transmission rod. The four-axis central turntable is connected to the transmission rod by screws. The transmission rod drives the limiter to move along the guide rail to adjust the spacing of the screwdrivers. There are four groups of screw holes on the four-axis central turntable, and each group of screw holes corresponds to a group of transmission rods; there are three groups of screw holes on the three-axis central turntable of the three-axis wrench, and each group of screw holes corresponds to a group of transmission rods.

[0008] Preferably, the four-axis coaxial transmission structure includes four groups of telescopic rods, and the length of each group of telescopic rods is locked through the cooperation of a pin and a slot; the three-axis coaxial rotation structure of the three-axis wrench includes three groups of telescopic rods. The torque sensor of the intelligent handle and the motor form a closed-loop control through a wire. When the detected torque exceeds the preset threshold, the motor automatically stops running. The screwdriver is of a replaceable design and is fixed through the screw holes of the limiter to adapt to bolts of different specifications.

[0009] Preferably, the battery is a rechargeable lithium battery, which is integrated into the grip of the intelligent handle and supplies power to the motor and the torque sensor through a wire. The guide rail is a linear slide rail, and the limiter is slidably connected to the guide rail through a ball bearing to achieve low-friction adjustment. The screwdrivers of the four-axis wrench and the three-axis wrench rotate synchronously through the coaxial transmission structure, and the torque of each screwdriver is uniformly calibrated by the torque sensor to ensure uniform force.

[0010] Compared with the prior art, the present invention has the following beneficial effects: Modular adaptation: Quickly replace the three-axis / four-axis wrench through the snap-fastener structure to meet the needs of multiple scenarios (for example, the four-axis is used for the engine cylinder head, and the three-axis is used for the narrow space of the gearbox).

[0011] Coaxial synchronous transmission: The four-axis / three-axis centering and shrinking structure drives the screwdriver to move precisely along the guide rail. Combined with the telescopic rod locking function, it ensures that the spacing of multiple screwdrivers is adjustable and rotates synchronously, avoiding stress concentration.

[0012] Intelligent torque control: The torque sensor monitors the torque in real time, and the closed-loop controls the output of the motor. When the threshold is exceeded, it automatically stops, preventing the screw from slipping or overloading and damaging the equipment.

[0013] Strong scalability: The design of the guide rail, screw holes, and replaceable screwdriver supports the adaptation to bolts of different specifications, expanding the applicable range of the tool. Brief Description of the Drawings

[0014] Figure 1 is a schematic diagram of the four-axis wrench structure of the present invention; Figure 2 is a schematic diagram of the telescopic rod structure of the present invention; Figure 3It is a schematic structural diagram of the transmission rod of the present invention; Figure 4 It is a schematic structural diagram of the three-axis fixed bracket of the present invention; Figure 5 It is a schematic structural diagram of the three-axis center turntable of the present invention; Figure 6 It is a schematic structural diagram of the three-axis core-aligning and shrinking structure of the present invention; Figure 7 It is a schematic overall structural diagram of the intelligent handle of the present invention; Figure 8 It is a schematic structural diagram of the limiter of the core-aligning and shrinking structure of the present invention; Figure 9 Schematic structural diagram of the telescopic rod of the coaxial transmission structure of the present invention; Figure 10 It is a schematic structural diagram of the screwdriver of the present invention.

[0015] In the figure, the corresponding relationship between the component names and the drawing numbers is as follows: 1. Four-axis wrench; 2. Four-axis core-aligning and shrinking structure; 3. Four-axis coaxial transmission structure; 4. Four-axis fixed bracket; 5. Screwdriver; 6. Transmission rod; 7. Four-axis center turntable; 8. Guide rail; 9. Limiter; 10. Telescopic rod; 11. Screw; 12. Three-axis wrench; 13. Three-axis core-aligning and shrinking structure; 14. Three-axis coaxial rotation structure; 15. Three-axis fixed bracket; 16. Three-axis center turntable; 17. Buckle; 18. Intelligent handle; 19. Grip; 20. Shell; 21. Motor; 22. Torque sensor; 23. Wire; 24. Battery; 25. Screw hole; 26. Pin; 27. Card slot. Detailed implementation manners

[0016] The following further describes in detail the implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0017] Please refer to Figures 1-10, the present invention provides an intelligent multi-torque wrench, comprising: a four-axis wrench 1, a three-axis wrench 12, a buckle 17 and an intelligent handle 18; the four-axis wrench 1 is detachably connected to the intelligent handle 18 through the buckle 17, and the three-axis wrench 12 is detachably connected to the intelligent handle 18 through the buckle 17. During use, by swapping the three-axis wrench 12 and the four-axis wrench 1, various different assembly situations are adapted, and operations under various different working conditions are realized; the four-axis wrench 1 includes a four-axis centering and shrinking structure 2, a four-axis coaxial transmission structure 3, a four-axis fixed bracket 4 and a screwdriver 5. By rotating the four-axis center turntable 7 and the three-axis center turntable 16 to drive the transmission rod 6 to drive the stopper 9 to move on the guide rail 8, the distance between the screwdrivers 5 is adjusted, thus adapting to the assembly of multi-size parts and making the assembly work simpler; the four-axis centering and shrinking structure 2 is connected to the four-axis coaxial transmission structure 3 through the four-axis fixed bracket 4. Four guide rails 8 are provided on the four arms of the four-axis fixed bracket 4. The stopper 9 is movably connected to the guide rail 8, and the stopper 9 is connected to the screwdriver 5. By rotating the telescopic rod 10 to drive the screwdriver 5 to rotate coaxially, multiple screwdrivers 5 can rotate simultaneously with the same force, thus solving problems such as possible poor airtightness and stress concentration. The precision of the assembly is improved; the intelligent handle 18 includes a motor 21, a torque sensor 22 and a battery 24. The motor 21 drives the four-axis wrench 1 or the three-axis wrench 12. The torque sensor 22 monitors the torque in real time and controls the output of the motor 21 through feedback. By connecting the torque sensor 22 to the motor 21 to obtain the force feedback of the screwdriver 5, the force of the motor 21 is adjusted, realizing the intelligence of the assembly.

[0018] The housing 20 of the intelligent handle 18 is provided with modular interfaces, which are compatible with the quick replacement of the four-axis wrench 1 and the three-axis wrench 12 through the buckle 17. The four-axis centering and shrinking structure 2 includes a four-axis center turntable 7 and a transmission rod 6. The four-axis center turntable 7 is connected to the transmission rod 6 through a screw 11. The transmission rod 6 drives the stopper 9 to move along the guide rail 8 to adjust the distance between the screwdrivers 5. Four groups of screw holes 25 are provided on the four-axis center turntable 7, and each group of screw holes 25 corresponds to a group of transmission rods 6; three groups of screw holes 25 are provided on the three-axis center turntable 16 of the three-axis wrench 12, and each group of screw holes 25 corresponds to a group of transmission rods 6.

[0019] The four-axis coaxial transmission structure 3 includes four groups of telescopic rods 10, and the length of each group of telescopic rods 10 is locked through the cooperation of a pin 26 and a slot 27; the three-axis coaxial rotation structure 14 of the three-axis wrench 12 includes three groups of telescopic rods 10. The torque sensor 22 of the intelligent handle 18 and the motor 21 form a closed-loop control through a wire 23. When the detected torque exceeds the preset threshold, the motor 21 automatically stops running. The screwdriver 5 is of a replaceable design and is fixed through the screw holes 25 of the stopper 9 to adapt to bolts of different specifications.

[0020] The battery 24 is a rechargeable lithium battery, integrated within the grip 19 of the intelligent handle 18, and powers the motor 21 and the torque sensor 22 through the wire 23. The guide rail 8 is a linear slide rail, and the limiter 9 is slidably connected to the guide rail 8 through a ball bearing to achieve low-friction adjustment. The screwdrivers 5 of the four-axis wrench 1 and the three-axis wrench 12 rotate synchronously through a coaxial transmission structure, and the torque of each screwdriver 5 is uniformly calibrated by the torque sensor 22 to ensure uniform force application.

[0021] Working principle: Modular installation: Select a four-axis wrench or a three-axis wrench according to the assembly requirements and connect it to the intelligent handle 18 through the buckle 17.

[0022] Spacing adjustment: Rotate the four-axis / three-axis center turntable 7 / 16, drive the transmission rod 6 to push the limiter 9 to slide along the guide rail 8, and adjust the spacing of the screwdrivers 5 to the target position.

[0023] Coaxial transmission: The motor 21 drives the telescopic rod 10 to drive the screwdrivers 5 to rotate synchronously, ensuring that the torque of each tool bit is consistent.

[0024] Closed-loop control: The torque sensor 22 detects the torque in real time. When the value exceeds the preset threshold, a signal is fed back through the wire 23 to the motor 21 to stop it, avoiding overload.

[0025] Core components: The four-axis wrench 1, a modular tool containing four groups of screwdrivers 5, used for simultaneously tightening four bolts. The spacing of the screwdrivers is adjusted through the four-axis centering and shrinking structure 2, and synchronous rotation is achieved through the four-axis coaxial transmission structure 3, suitable for symmetric multi-bolt scenarios such as engine cylinder heads.

[0026] The three-axis wrench 12, a modular tool containing three groups of screwdrivers 5, with a structure similar to that of the four-axis wrench, but adapted to narrow spaces such as gearboxes. The spacing of the screwdrivers is adjusted through the three-axis center turntable 16 and is driven by the three-axis coaxial rotation structure 14.

[0027] The intelligent handle 18, the control core, integrates the motor 21, the torque sensor 22, and the battery 24. Connects the four-axis / three-axis wrench through the buckle 17 to achieve torque closed-loop control and power output.

[0028] The buckle 17, a detachable connection structure, is used for quickly replacing the four-axis wrench 1 and the three-axis wrench 12 to ensure the flexibility of the modular design.

[0029] Transmission and adjustment structure: The four-axis centering and shrinking structure 2 consists of the four-axis center turntable 7, the transmission rod 6, and the guide rail 8. When rotating the turntable 7, the transmission rod 6 pushes the limiter 9 to slide along the guide rail to adjust the spacing of the screwdrivers 5 to adapt to different bolt layouts.

[0030] The four-axis coaxial drive structure 3 includes four sets of telescopic rods 10, whose lengths are locked by pins 26 and slots 27. Driven by the motor 21, it drives the four sets of screwdrivers 5 to rotate synchronously to ensure uniform torque.

[0031] The three-axis coaxial rotation structure 14, the transmission component of the three-axis wrench 12, has a similar structure to the four-axis coaxial drive structure 3, but only includes three sets of telescopic rods 10, which are adapted to the three-axis mode.

[0032] The transmission rod 6, a rigid rod connecting the central turntable 7 / 16 and the limiter 9, converts the rotational motion of the turntable into the linear displacement of the limiter to achieve pitch adjustment.

[0033] Fixing and guiding structure: The guide rail 8, a linear slide rail, is fixed on the arm of the four-axis / three-axis fixing bracket 4 / 15. The limiter 9 slides along the guide rail through a ball bearing to reduce the frictional resistance and ensure the adjustment accuracy.

[0034] The limiter 9, a sliding module installed on the guide rail 8, fixes the screwdriver 5 through the screw hole 25. Driven by the transmission rod 6, it adjusts the position of the screwdriver.

[0035] The telescopic rod 10, a telescopic transmission shaft, connects the screwdriver 5 and the motor 21. Its length is locked by the pin 26 and the slot 27 to adapt to different working depths.

[0036] Control and power components: The motor 21, the power source of the intelligent handle 18, drives the telescopic rod 10 to rotate and provides torque for the screwdriver 5. Controlled by the feedback of the torque sensor 22, it automatically stops when the threshold is exceeded.

[0037] The torque sensor 22, which real-time monitors the torque of the screwdriver 5, forms a closed-loop control with the motor 21 through the wire 23 to prevent overloading or bolt slipping.

[0038] The battery 24, a rechargeable lithium battery, is integrated in the grip 19 to supply power to the motor 21 and the sensor 22, supporting continuous operation for 4 hours.

[0039] Auxiliary structure: The four-axis fixing bracket 4, the support frame of the four-axis wrench 1, has guide rails 8 fixed on its four arms to ensure the stability of the drive structure.

[0040] The three-axis fixing bracket 15, the support frame of the three-axis wrench 12, has a similar structure to the four-axis fixing bracket 4, but only has three arms.

[0041] The screw hole 25, a threaded hole located on the central turntable 7 / 16 and the limiter 9, fixes the transmission rod 6 or the screwdriver 5 through the screw 11.

[0042] The locking pin 26 and the slot 27, the length locking mechanism of the telescopic rod 10. After the locking pin is inserted into the slot, the telescopic rod is fixed to prevent loosening during operation.

[0043] Coaxial drive: Multiple groups of screwdrivers (5) rotate synchronously through the telescopic rod (10) to ensure torque consistency.

[0044] Modular interface: The design of the housing (20) of the intelligent handle (18) supports the quick replacement of different wrenches.

[0045] Closed-loop control: The torque sensor (22) feeds back signals to the motor (21) to dynamically adjust the output torque and achieve intelligent operation.

[0046] Embodiment 1: Engine cylinder head assembly Install the four-axis wrench 1 to the intelligent handle 18 through the buckle 17.

[0047] Rotate the four-axis central turntable 7 to adjust the distance between the four groups of screwdrivers 5 to the cylinder head bolt holes.

[0048] Start the motor 21, and the four-axis coaxial drive structure 3 drives the screwdrivers 5 to synchronously tighten the bolts. The torque sensor 22 controls the torque within the range of 20 - 25 N·m.

[0049] After the tightening is completed, the motor 21 automatically stops, disassemble the wrench and replace it with a three-axis mode for gearbox assembly.

[0050] Embodiment 2: Operation in a narrow space Install the three-axis wrench 12, and adjust the three-axis central turntable 16 to reduce the distance between the screwdrivers 5 to 50 mm.

[0051] Lock the length of the telescopic rod 10 through the locking pin 26 to avoid tool interference with surrounding components.

[0052] Set the torque threshold to 15 N·m and perform low-torque precision assembly.

[0053] Key parameters Torque range: 5 - 50 N·m (programmable adjustment) Screwdriver adapter specifications: M4 - M12 Battery life: Continuous working for 4 hours (rechargeable lithium battery).

[0054] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles of the invention and its practical applications, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. An intelligent multi-torque wrench, characterized in that: include: A four-axis wrench (1), a three-axis wrench (12), a buckle (17) and an intelligent handle (18); The four-axis wrench (1) is detachably connected to the smart handle (18) via a buckle (17), and the three-axis wrench (12) is detachably connected to the smart handle (18) via a buckle (17); The four-axis wrench (1) comprises a four-axis core-aligning contraction structure (2), a four-axis coaxial transmission structure (3), a four-axis fixed bracket (4) and a screwdriver (5); the four-axis core-aligning contraction structure (2) is connected to the four-axis coaxial transmission structure (3) via the four-axis fixed bracket (4); four guide rails (8) are provided on four arms of the four-axis fixed bracket (4); a limiter (9) is movably connected to the guide rail (8); and the limiter (9) is connected to the screwdriver (5); The intelligent handle (18) comprises a motor (21), a torque sensor (22) and a battery (24); the motor (21) drives the four-axis wrench (1) or the three-axis wrench (12); the torque sensor (22) monitors the torque in real time and controls the output of the motor (21) through feedback.

2. An intelligent multi-torque wrench as claimed in claim 1, characterized in that: The housing (20) of the smart handle (18) is provided with a modular interface, which is compatible with the quick replacement of a four-axis wrench (1) and a three-axis wrench (12) via a buckle (17).

3. The intelligent multi-torque wrench according to claim 1, characterized in that: The four-axis core-aligning contraction structure (2) comprises a four-axis center turntable (7) and a transmission rod (6); the four-axis center turntable (7) is connected to the transmission rod (6) via a screw (11); the transmission rod (6) drives the limiter (9) to move along the guide rail (8) to adjust the spacing of the screwdriver (5).

4. An intelligent multi-torque wrench as claimed in claim 3, characterized in that: The four-axis center turntable (7) is provided with four groups of screw holes (25), and each group of screw holes (25) is connected to a corresponding group of transmission rods (6); the three-axis center turntable (16) of the three-axis wrench (12) is provided with three groups of screw holes (25), and each group of screw holes (25) is connected to a corresponding group of transmission rods (6).

5. The intelligent multi-torque wrench as claimed in claim 1, characterized in that: The four-axis coaxial transmission structure (3) comprises four groups of telescopic rods (10), and the length of each group of telescopic rods (10) is locked by the cooperation of a latch pin (26) and a latch slot (27); the three-axis coaxial rotation structure (14) of the three-axis wrench (12) comprises three groups of telescopic rods (10).

6. The intelligent multi-torque wrench according to claim 1, characterized in that: The torque sensor (22) of the smart handle (18) and the motor (21) form a closed-loop control via a wire (23); when it is detected that the torque exceeds a preset threshold, the motor (21) automatically stops running.

7. The intelligent multi-torque wrench according to claim 1, characterized in that: The screwdriver (5) is of replaceable design and is fixed through the screw hole (25) of the limiter (9) to accommodate bolts of different specifications.

8. The intelligent multi-torque wrench as claimed in claim 1, characterized in that: The battery (24) is a rechargeable lithium battery, which is integrated into the grip (19) of the smart handle (18) and supplies power to the motor (21) and the torque sensor (22) via a wire (23).

9. The intelligent multi-torque wrench according to claim 1, characterized in that: The guide rail (8) is a linear slide rail, and the limiter (9) is slidably connected to the guide rail (8) via a ball bearing, thereby achieving low-friction adjustment.

10. The intelligent multi-torque wrench according to claim 1, characterized in that: The screwdrivers (5) of the four-axis wrench (1) and the three-axis wrench (12) rotate synchronously via a coaxial transmission structure, and the torque of each screwdriver (5) is uniformly calibrated by a torque sensor (22) to ensure uniform force.

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