Torque wrench

Abstract

The invention discloses a torque wrench. The torque wrench comprises a body part, wherein the body part is provided with an outwards-opened accommodating groove; the working part comprises an inner rod part assembled in the accommodating groove and a working head connected with the inner rod part and exposed outside the body part; the torsion sensor is arranged at the inner rod part of the working part; the tripping unit is arranged in the accommodating groove of the body part, and the tripping unit is relatively movably connected with the inner rod part of the working part; the torsion setting unit is used for applying set torsion to the tripping unit; and the controller is arranged on the torque wrench and is electrically connected with the torque sensor and the torque setting unit. When the stress borne by the working part is larger than the set torsion, the torsion setting unit drives the tripping unit, so that the working part cannot be stressed instantly, improper operation of a user is avoided, and the situation that the locking acting force exceeds the load of a component is avoided.

Description

Technical Field

[0001] The invention relates to a torque wrench which, when operated to reach a preset torque, breaks off and cannot continue to bear force. Background Art

[0002] Many industries use bolts and nuts to assemble components, and in order to turn bolts and nuts, wrenches are used to drive them directly, or wrenches are used to drive them 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. Abnormal operation can cause damage to components, and even cause component failure or loss of operating accuracy.

[0003] Common torque wrenches can provide users with default torque settings. Whether they are traditional mechanical or electronic, when the force applied to the torque wrench reaches the set value, it will emit a sound to remind the user. Some electronic torque wrenches may also have additional light or vibration reminders.

[0004] 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 such noisy and polluted environments for a long time are prone to neglect the reminders and warnings of the torque wrench due to sensory numbness and fatigue, so that users stop applying the torque wrench too late, resulting in the locking force exceeding the load of the component. Therefore, it is necessary to improve the torque wrench. Summary of the invention

[0005] The main technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a torque wrench which, when operated to reach a preset torque, jumps out and cannot continue to bear force.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A torque wrench comprises: a body portion having an outwardly open receiving groove; a working portion comprising an inner rod portion assembled in the receiving groove, and a working head connected to the inner rod portion and exposed outside the body portion; a torque sensor arranged in the inner rod portion of the working portion; a trip unit arranged in the receiving groove of the body portion, and the trip unit is relatively movably connected to the inner rod portion of the working portion; a torque setting unit for applying a set torque to the trip unit; and a controller (central processing unit) arranged in the torque wrench and electrically connected to the torque sensor and the torque setting unit; wherein when the force borne by the working portion is greater than the set torque, the torque setting unit drives the trip unit, so that the working portion cannot be borne force instantly.

[0008] The beneficial effect of the present invention is that it allows users to use a torque wrench and perform a preset torque operation. When the torque wrench reaches the preset torque, it can trip and fail to continue to bear the force, thereby avoiding improper operation by the user, and the locking force will not exceed the load that the component can bear, thereby ensuring that the locking force of the component meets the specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0010] Figure 1 It is a three-dimensional schematic diagram of the torque wrench of the present invention.

[0011] Figure 2 It is a schematic diagram of a control block of the torque wrench block of the present invention.

[0012] Figure 3 It is a partial cross-sectional schematic diagram of the first embodiment of the torque wrench of the present invention.

[0013] Figure 4 It is a partial cross-sectional schematic diagram of the second embodiment of the torque wrench of the present invention.

[0014] Description of the numbers in the figure:

[0015] Controller 10 Display 20

[0016] Input button 30 Battery 40

[0017] Main body 100 Accommodating groove 110

[0018] Working part 200 Inner rod part 210

[0019] Inner bevel 211 Working head 220

[0020] Torque sensor 300

[0021] Trip unit 400 Trip seat 410

[0022] Jump out of the outer slope 411 Jump out of the base 420

[0023] Receptacle 421 Jumping off the upper seat 430

[0024] The upper receiving groove 431 jumps off the outer inclined surface 432

[0025] Elastic component 440

[0026] Torque setting unit 500 Motor 510

[0027] Drive shaft 520 DETAILED DESCRIPTION

[0028] See also Figures 1 to 3As shown in the figure, a torque wrench is disclosed, which includes: a main body 100, which has a receiving groove 110 opened outward; a working part 200, which includes an inner rod 210 assembled to the receiving groove 110, and a working head 220 connected to the inner rod 210 and exposed outside the main body 100; a torque sensor 300, which is arranged on the inner rod 210 of the working part 200, and the present embodiment takes two torque sensors 300 as an example and is arranged at opposite sides of the inner rod 210; a trip unit 400, which is arranged on the receiving groove of the main body 100 The torque wrench is provided with a torque sensor 300 and a torque setting unit 500, wherein the torque setting unit 500 is arranged in the slot 110, and the trip unit 400 is connected to the inner rod 210 of the working part 200 in a relatively movable manner; 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 is instantly unable to bear the force.

[0029] Through the above structural configuration, the user is provided with a torque wrench and performs a preset torque operation. When the torque wrench reaches the preset torque, it can trip and fail to continue to bear the force, thereby avoiding improper operation by the user, and the locking force will not exceed the load capacity of the component, thereby ensuring that the locking force of the component meets the specifications.

[0030] The detailed features of the torque wrench, the operational relationship between the various 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 a screw as an example), and the drive shaft 520 drives the trip seat 410 of the trip 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 the motor 510 to adjust the spacing between the trip seat 410 and the inner rod 210 to define the 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, so as to achieve the trip state.

[0031] In this embodiment, the top of the trip seat 410 is provided with a trip outer inclined surface 411 , and the end edge of the inner rod portion 210 of the working portion has a trip inner inclined surface 211 movably engaged with the trip outer inclined surface 411 .

[0032] In this embodiment, a display 20 is further included and is disposed on the main body portion 100 and is electrically connected to the controller 10; the display 20 displays the torque value detected by the torque sensor 300 in real time (used to output a signal to the display 20 based on the strain of the working portion 200, thereby displaying the force exerted on the working portion 200).

[0033] 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 sets a default torque value and displays it on the display 20 .

[0034] In this embodiment, the torque sensor 300 is a strain gage.

[0035] 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 of this embodiment can be installed on the main body 100 and adjacent to the motor 510. The battery 40 is rechargeable and is movably installed on the main body 100, and can be charged by an external power source.

[0036] See also Figure 4 As shown, it is a second embodiment of the present invention, which is different from the above embodiment in that: the trip unit 400 includes a trip base 420, a trip upper seat 430 and an elastic component 440 located between the trip base 420 and the trip upper seat 430. The elastic component 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 component 440, and the trip upper seat 430 to move, so that the spacing between the trip upper seat 430 and the inner rod 210 and the compression state of the elastic component 440 define the set torque; 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 component 440), so as to reach the trip state.

[0037] In the second embodiment of the present invention, the bottom of the jump upper seat 430 is provided with an upper receiving groove 431 for receiving one end of the elastic component 440; the top of the jump base 420 is provided with a bottom receiving groove 421 for receiving the other end of the elastic component 440. Through the above structural configuration, the two ends of the elastic component 440 can be stably fixed between the jump upper seat 430 and the jump base 420, so as to prevent the two ends of the elastic component 440 from accidentally detaching from the jump upper seat 430 and the jump base 420.

[0038] In the second embodiment of the present invention, the top of the escape upper seat 430 is provided with an escape outer inclined surface 432 , and the end edge of the inner rod portion 210 of the working portion 200 has an escape inner inclined surface 211 movably engaged with the escape outer inclined surface 432 .

[0039] Through the above structural description and various embodiments, it can be revealed that the torque wrench of the present invention can accurately control the locking force applied to the component to meet the specification by driving the trip unit 400 through the torque setting unit 500.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A torque wrench, It is characterized in that include: A main body portion having a receiving groove opened outward; The working part includes an inner rod part assembled to the receiving groove, and a working head connected to the inner rod part and exposed outside the main body part; a torque sensor disposed on the inner rod portion of the working portion; A trip unit is disposed in the receiving groove of the main body portion and is relatively movablely connected to the inner rod portion of the working portion; A torque setting unit, used for applying a set torque to the trip unit; and a controller, which is disposed 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 jump unit so that the working part is instantly unable to bear the force.

2. The torque wrench according to claim 1, It is characterized in that The torque setting unit includes a motor and a driving shaft; the motor drives the driving shaft, and the driving shaft drives the tripping seat of the tripping unit.

3. The torque wrench according to claim 2, It is characterized in that The top of the jump seat is provided with an outer jump slope, and the end edge of the inner rod portion is provided with an inner jump slope which is movably connected to the outer jump slope.

4. The torque wrench according to claim 1, It is characterized in that The torque setting unit includes a motor and a driving shaft; the trip unit includes a trip base, a trip upper seat and an elastic component located between the trip base and the trip upper seat.

5. The torque wrench according to claim 4, It is characterized in that The bottom of the jump upper seat is provided with an upper receiving groove for receiving one end of the elastic component; the top of the jump base is provided with a bottom receiving groove for receiving the other end of the elastic component.

6. The torque wrench according to claim 4, It is characterized in that The top of the jump-out upper seat is provided with a jump-out outer inclined surface, and the end edge of the inner rod portion is provided with a jump-out inner inclined surface movably connected to the jump-out outer inclined surface.

7. The torque wrench according to claim 4, It is characterized in that The elastic component is a compression spring.

8. The torque wrench according to claim 1, It is characterized in that A display is further included and is arranged on the main body and is electrically connected to the controller.

9. The torque wrench according to claim 1, It is characterized in that It further includes an input button which is arranged on the main body and is electrically connected to the controller; the input button sets a preset torque value.

10. The torque wrench according to claim 1, It is characterized in that The torque sensor is a strain gauge.

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