TWI862320B - Torque wrench - Google Patents

Abstract

A torque wrench, which includes a body part with an outwardly opening accommodating groove; a working part including an inner rod part assembled with the accommodating groove, and a working head connected to the inner rod part and exposed outside the body part; a torque sense The detector is arranged on the inner rod part of the working part; the tripping unit is arranged in the receiving groove of the body part, and the tripping unit is relatively movable connected to the inner rod part of the working part; the torque setting unit is used to apply the set torque on the trip unit; and the controller are installed on the torque wrench and are electrically connected to the torque sensor and the torque setting unit. When the force endured by the working part is greater than the set torque, the torque setting unit drives the trip unit so that the working part cannot bear force instantly, thereby avoiding improper operation by the user and preventing the locking force from exceeding the load capacity of the component. .

Description

Torque wrench

The present invention is a torque wrench that trips when it is operated to reach a preset torque and cannot continue to bear the force.

Many industries use bolts and nuts as components for assembly. In order to turn bolts and nuts, they are driven directly by wrenches or driven by wrenches with socket adapters. Torque wrenches are used for industries with high precision requirements and must be tightened and loosened according to the specified torque value. Improper operation will cause damage to components and even cause component failure or loss of operating accuracy.

Common torque wrenches allow users to set preset torques. Whether they are traditional mechanical or electronic, when the force exerted on the torque wrench reaches the set value, it will emit a sound to remind the user. Some electronic torque wrenches may also have additional lighting or vibration reminders.

However, some working environments are full of noise, such as the operation of mechanical machines and processing sounds (collision, impact, friction). Users who use torque wrenches in these noisy and polluted environments for a long time are likely to neglect the reminders and warnings of the torque wrench due to sensory numbness and fatigue, causing the user to stop applying the torque wrench too late, resulting in the locking force exceeding the load of the component. Therefore, the torque wrench needs to be improved.

The present invention is a torque wrench, which comprises: a body part, which has a receiving groove opened outward; a working part, which comprises an inner rod part assembled in the receiving groove, and a working head connected to the inner rod part and exposed outside the body part; a torque sensor, which is arranged in the inner rod part of the working part; a trip unit, which is arranged in the receiving groove of the body part, and the trip unit is relatively movable. The inner rod part of the working part is dynamically connected; the torque setting unit is used to apply the set torque to the trip unit; and the controller (central processing unit) is arranged on the torque wrench and is electrically connected to the torque sensor and the torque setting unit; when the force borne by the working part is greater than the set torque, the torque setting unit drives the trip unit so that the working part cannot be subjected to force instantly.

Through the above structural configuration, users can use the torque wrench and perform preset torque operations. When the torque wrench reaches the preset torque, it can trip and fail to continue to bear the force, thereby avoiding improper operation by users and preventing the locking force from exceeding the load capacity of the component. This ensures that the locking force of the component meets the specifications.

10: Controller

20: Display

30: Input button

40:Battery

100: Main body

110: Storage tank

200: Working part

210: Inner rod

211: Jump off the inner slope

220: Working head

300:Torque sensor

400: Jump out of unit

410: Jump out of seat

411: Jump off the outer slope

420: Jump off the base

421: Container

430: Jump off the seat

431: Bottom tank

432: Jump off the outer slope

440: Elastic element

500: Torque setting unit

510: Motor

520: Drive shaft

The first figure is a three-dimensional schematic diagram of the torque wrench of the present invention.

The second figure is a schematic diagram of the control block of the torque wrench block of the present invention.

The third figure is a partial cross-sectional schematic diagram of the first embodiment of the torque wrench of the present invention.

The fourth figure is a partial cross-sectional schematic diagram of the second embodiment of the torque wrench of the present invention.

Referring to the first to third figures, a torque wrench is disclosed, which includes: a body portion 100 having a receiving slot 110 opened outward; a working portion 200 including an inner rod portion 210 assembled to the receiving slot 110, and a working head 220 connected to the inner rod portion 210 and exposed outside the body portion 100; a torque sensor 300 disposed on the inner rod portion 210 of the working portion 200. In this embodiment, two torque sensors 300 are used as an example and are disposed on opposite sides of the inner rod portion 210; a trip unit 400 disposed on the body portion 100. 0 in the receiving groove 110, and the trip unit 400 is relatively movable and connected to the inner rod 210 of the working part 200; a torque setting unit 500, which is used to apply a set torque to the trip unit 400; and a controller 10 (the controller 10 in this embodiment is a central processing unit as an example), which is arranged in the torque wrench and is electrically connected to the torque sensor 300 and the torque setting unit 500; wherein when the force borne by the working part 200 is greater than the set torque, the torque setting unit 500 drives the trip unit 400, so that the working part 200 cannot be subjected to force instantly.

Through the above structural configuration, users can use the torque wrench and perform preset torque operations. When the torque wrench reaches the preset torque, it can trip and fail to continue to bear the force, thereby avoiding improper operation by users and preventing the locking force from exceeding the load capacity of the component. This ensures that the locking force of the component meets the specifications.

The detailed features of the torque wrench, the operational relationship between the components and the functions that can be achieved are further described. The torque setting unit 500 includes a motor 510 and a drive shaft 520; the motor 510 (the motor 510 in this embodiment can be an electric brushless DC motor) drives the drive shaft 520 (the drive shaft 520 in this embodiment is an example of a screw), and the drive shaft 520 drives the tripping seat 410 of the tripping unit 400. When the motor 510 receives the driving signal from the controller 10, it drives the drive shaft 520 to rotate. The present invention uses a motor 510 to adjust the distance between the trip seat 410 and the inner rod 210 to define a set torque; and when the torque wrench is used to reach the set torque, the motor 510 drives the drive shaft 520 to synchronously drive the trip seat 410 to move away from the inner rod 210, thereby achieving a trip state.

In this embodiment, the top of the trip seat 410 is provided with a trip outer bevel 411, and the end edge of the inner rod portion 210 of the working portion has a trip inner bevel 211 that is movably engaged with the trip outer bevel 411.

In this embodiment, a display 20 is further included and is disposed on the main body 100 and electrically connected to the controller 10; the display 20 displays the torque value detected by the torque sensor 300 in real time (for outputting a signal to the display 20 according to the strain of the working part 200, so as to display the force borne by the working part 200).

In this embodiment, an input button 30 is further included and is disposed on the main body 100 and is electrically connected to the controller 10; the input button 30 is used to set a preset torque value and display it on the display 20.

In this embodiment, the torque sensor 300 is a strain gage.

The torque wrench of this embodiment is electrically connected to the controller 10 through the battery 40, so as to provide the power required for the operation of the torque sensor 300, the controller 10, the torque setting unit 500 and the display 20. The battery 40 in this embodiment can be installed in the main body 100 and adjacent to the side of the motor 510. The battery 40 is rechargeable and is movably installed in the main body 100, and can be charged by an external power source.

Please refer to the fourth figure, which is the second embodiment of the present invention, which is different from the above embodiments in that the trip unit 400 includes a trip base 420, a trip upper seat 430, and an elastic element 440 located between the trip base 420 and the trip upper seat 430. The elastic element 440 is a compression spring. The motor 510 drives the drive shaft 520 to rotate, and the drive shaft 520 drives the trip base 420, the elastic element 440, and the trip upper seat 430 to move, thereby defining the set torque according to the distance between the trip upper seat 430 and the inner rod 210 and the compression state of the elastic element 440; and when the torque wrench is used to reach the set torque, the motor 510 drives the drive shaft 520 to rotate and synchronously drives the trip base 420 to move away from the inner rod 210 (changing the preload compression amount of the elastic element 440), thereby achieving the trip state.

In the second embodiment of the present invention, the bottom of the jump-off upper seat 430 is provided with an upper receiving groove 431 for accommodating one end of the elastic element 440; the top of the jump-off base 420 is provided with a bottom receiving groove 421 for accommodating the other end of the elastic element 440. Through the above structural configuration, the two ends of the elastic element 440 can be stably fixed between the jump-off upper seat 430 and the jump-off base 420 to prevent the two ends of the elastic element 440 from accidentally detaching from the jump-off upper seat 430 and the jump-off base 420.

In the second embodiment of the present invention, the top of the jump-off upper seat 430 is provided with a jump-off outer inclined surface 432, and the end edge of the inner rod portion 210 of the working part 200 has a jump-off inner inclined surface 211 that is movably engaged with the jump-off outer inclined surface 432.

Through the above structural description and various embodiments, the torque wrench of the present invention can be revealed. By driving the trip unit 400 with the torque setting unit 500, the locking force applied to the component can be accurately controlled to meet the specifications.

20: Display

30: Input button

100: Main body

200: Working part

220: Working head

Claims (10)

A torque wrench includes: a main body having an outwardly open receiving groove; a working part including an inner rod connected to the receiving groove, and a working head connected to the inner rod and exposed outside the main body; a torque sensor disposed on the inner rod of the working part; a trip unit disposed in the receiving groove of the main body, and the trip unit is relatively movable and connected to the inner rod of the working part; a torque setting unit for applying a set torque to the trip unit; and a controller disposed on the torque wrench and electrically connected to the torque sensor and the torque setting unit; When the force borne by the working part is greater than the set torque, the torque setting unit drives the trip unit so that the working part cannot be borne force instantly. A torque wrench as described in claim 1, wherein the torque setting unit includes a motor and a drive shaft; the motor drives the drive shaft, and the drive shaft drives the trip seat of the trip unit. A torque wrench as described in claim 2, wherein the top of the trip seat is provided with a trip outer bevel, and the end edge of the inner rod has a trip inner bevel movably engaged with the trip outer bevel. A torque wrench as described in claim 1, wherein the torque setting unit includes a motor and a drive shaft; the trip unit includes a trip base, a trip upper seat, and an elastic element located between the trip base and the trip upper seat. A torque wrench as described in claim 4, wherein the bottom of the jump-out upper seat is provided with an upper receiving groove for accommodating one end of the elastic element; and the top of the jump-out base is provided with a bottom receiving groove for accommodating the other end of the elastic element. A torque wrench as described in claim 4, wherein the top of the release upper seat is provided with a release outer bevel, and the end edge of the inner rod has a release inner bevel movably engaged with the release outer bevel. A torque wrench as described in claim 4, wherein the elastic element is a compression spring. The torque wrench as described in claim 1 further includes a display disposed on the main body and electrically connected to the controller. The torque wrench as described in claim 1 further includes an input button disposed on the main body and electrically connected to the controller; the input button is used to set a preset torque value. A torque wrench as described in claim 1, wherein the torque sensor is a strain gauge.

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