Torque wrench with counting function

Abstract

A torque wrench with a counting function comprises a wrench body, a counter and a sensor. The wrench body comprises a first body and a second body, and the second body is provided with a driving part and an extending part; the extension part is connected with the first body; the driving part is connected with a locking piece, the wrench body is rotated to apply torsion to the locking piece, and when the torsion reaches a preset torsion output value, the second body deflects by a preset angle relative to the first body. The counter is arranged on the wrench body and can display numbers. The sensor is arranged on the wrench body and used for detecting the second body. When the sensor detects that the second body deflects by the preset angle, the sensor generates a signal and transmits the signal to the counter, so that the number displayed by the counter is added with 1.

Description

Technical Field

[0001] The utility model relates to a hand tool, in particular to a torque wrench with a counting function. Background Art

[0002] A commonly used fixed-torque wrench has a first body and a second body. The first body has a holding portion and a handle portion, and the second body has a driving portion and an extension portion. The extension portion of the second body is inserted into the handle portion of the first body. A torque module is arranged in the second body and is connected to the extension portion of the second body. The torque module can be used by a user to set a predetermined torque value. When the user operates the wrench to rotate a fastener (such as a bolt or a nut), when the torque applied by the wrench to the fastener reaches the predetermined torque value, the extension portion will disengage from the torque module, causing the second body to deflect by an angle relative to the first body to notify the user that the fastener has reached the predetermined torque value and the rotation can be stopped.

[0003] The user manual of the foregoing wrench requires the user to perform calibration after using the wrench for a period of time or reaching a predetermined number of times, otherwise the torque module will not be able to provide a correct torque setting. Most users set a cycle (such as one year), and when the time limit arrives, the wrench is subjected to a calibration procedure. However, the number of uses within the cycle is not fixed. If the use within the cycle is very frequent, the wrench will quickly be unable to provide a correct torque output, so that a correct torque cannot be provided in the second half of the cycle. However, obviously, it is impractical to require the user to record the number of times of operating the wrench each time during work. Summary of the Utility Model

[0004] The main object of the utility model is to provide a torque wrench with a counting function, which has the function of recording the number of operations.

[0005] To achieve the above object, the utility model discloses a torque wrench with a counting function, which comprises a wrench body including a first body and a second body. The second body has a driving portion and an extension portion; the extension portion is connected to the first body; the driving portion is connected to a fastener, and the wrench body is rotated to apply a torque to the fastener. When the torque reaches a preset torque output value, the second body will deflect by a predetermined angle relative to the first body; a counter is arranged on the wrench body and can display numbers; and a sensor is arranged on the wrench body for detecting the movement of the second body. When the sensor detects that the second body deflects by the predetermined angle, the sensor generates a signal and transmits it to the counter, so that the number displayed by the counter is incremented by 1.

[0006] In one embodiment, the sensor has a switch disposed on the first body and corresponding to a head of the second body; when the second body is deflected by the predetermined angle, the head contacts the switch to generate a signal transmitted to the counter.

[0007] In one embodiment, the switch has a conductive sheet and two wires. The conductive sheet is disposed on the first body. One of the two wires connects the conductive sheet and the counter, and the other connects the head and the counter.

[0008] In one embodiment, an insulator is provided between the conductive sheet and the first body.

[0009] In one embodiment, the counter has a screen and a power supply. The screen is controlled to display numbers, and the power supply provides power to the screen.

[0010] In one embodiment, a warning device is included and connected to the counter. When the number on the counter reaches a warning count, the warning device issues a message to notify the user.

[0011] In one embodiment, the warning device has an LED lamp disposed on the first body to notify the user through light.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The torque wrench with a counting function provided by the present utility model, when the fastener is rotated and the set torque output value is reached, the second body will deflect a predetermined angle relative to the first body. At this time, the sensor will generate a signal and transmit it to the counter, increasing the number displayed on the counter by 1, so as to understand the usage times of the torque wrench and play a role in recording the operation times; furthermore, a warning device is provided. When the number recorded by the counter reaches the warning count, the warning device will issue a message to notify that the calibration procedure should be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a top view of a preferred embodiment of the present utility model, showing the state where the torque wrench is not used or the predetermined torque output value is not reached.

[0015] Figure 2 is a top view of a preferred embodiment of the present utility model, showing the state where the torque wrench reaches the predetermined torque output value.

[0016] Figure 3 is a block diagram of a preferred embodiment of the present utility model.

[0017] Figure 4 is a cross-sectional view of a preferred embodiment of the present utility model, showing the state where the sensor does not detect that the torque wrench reaches the predetermined torque output value.

[0018] Figure 5 A cross-sectional view of a preferred embodiment of the present invention, showing the state where the sensor detects that the torque wrench reaches the predetermined torque output value.

[0019] Reference numerals

[0020] 10: Wrench body; 12: Counter; 14: Sensor; 16: First body; 18: Second body; 20: Torque module; 22: Holding part; 24: Handle part; 26: Driving part; 28: Extension part; 30: Head; 32: Adjusting ring; 34: Screen; 36: Power supply; 38: Conductive sheet; 40: Electric wire; 42: Insulator; 44: Electric wire; 46: Alarm. Detailed implementation manners

[0021] The following is to give preferred embodiments in accordance with the purposes and effects of the present invention and to describe them in detail with reference to the accompanying drawings.

[0022] Please refer to Figures 1 to 5 As shown, a torque wrench with a counting function disclosed in a preferred embodiment of the present invention includes a wrench body 10, a counter 12, and a sensor 14.

[0023] The wrench body 10 includes a first body 16, a second body 18 and a torque module 20. The first body 16 has a gripping portion 22 and a handle portion 24. The diameter of the gripping portion 22 is greater than that of the handle portion 24. The handle portion 24 is hollow and one end thereof is connected to the gripping portion 22. The second body 18 has a driving portion 26 and an extension portion 28. The driving portion 26 is connected to a fastening member (not shown in the figure, such as a bolt or a nut). In this embodiment, the driving portion 26 is a two-way ratchet wrench. In other embodiments, the driving portion 26 can be a one-way ratchet wrench, an open-end wrench, a box wrench, an adjustable wrench, a socket wrench or an equivalent structure. One end of the extension portion 28 is connected to the driving portion 26 and one end thereof is inserted into the handle portion 24 of the first body 16. The torque module 20 is disposed in the first body 16 and is connected to a head 30 of the extension portion 28 to provide a resistance to the second body 18. An adjustment ring 32 is provided on the handle portion 24 and is connected to the torque module 20. Rotating the adjustment ring 32 can adjust the resistance applied by the torque module 20 to the second body 18, that is, set the torque output value of the torque wrench. When the user operates the torque wrench of the preferred embodiment of the present invention to rotate a fastening member, and when the torque applied by the torque wrench to the fastening member reaches the set torque output value, the head 30 will disengage from the torque module 20, causing the second body 18 to deflect an angle relative to the first body 16 to notify the user that the fastening member has reached the predetermined torque value and the rotation can be stopped. The components described above are all common devices, and their detailed structures will not be elaborated herein. Readers can obtain the detailed content of the above components in US7,451,674.

[0024] The counter 12 is disposed on the holding portion 22 of the first body 16 and can display numbers. In this embodiment, the counter 12 is an electronic counter, having a screen 34 and a power source 36. The screen 34 is controlled to display numbers, and the power source 36 provides necessary power for the screen 34. In other embodiments, the counter 12 can be a mechanical counter or other equivalent devices. The sensor 14 is disposed on the handle portion 24 of the first body 16 for detecting whether the extension portion 28 of the second body 18 moves a predetermined angle. If the extension portion 28 of the second body 18 moves the predetermined angle, the sensor 14 sends a signal to the counter 12, and the number displayed on the screen 34 of the counter 12 is incremented by 1. The sensor 14 has a switch in the handle portion 24 of the first body 16 and corresponding to the head 30 of the extension portion 28 of the second body 18. The switch is electrically connected to the counter 12. When the second body 18 is deflected by the predetermined angle, the head 30 contacts the switch, causing the switch to generate a signal and transmit it to the counter 12. In this embodiment, the switch has an annular conductive sheet 38 disposed on the inner side wall surface of the handle portion 24 and connected to the counter 12 through a wire 40. An insulator 42 is provided between the conductive sheet 38 and the handle portion 24 to make the conductive sheet 38 and the handle portion 24 electrically insulated. The head 30 is made of metal and has conductivity, and is connected to the counter 12 through another wire 44. In another embodiment, the head 30 is provided with a conductive sheet (not shown in the figure), and the wire 44 connects the conductive sheet and the counter 12, also achieving the same effect.

[0025] Please refer to Figure 4 As shown, when the torque wrench of this embodiment is not in use or when the lock fastener is rotated but does not reach the set torque output value, the head 30 and the conductive sheet 38 are separated by a predetermined distance, presenting an open circuit state. Please refer to Figure 5 As shown, when the torque wrench rotates the lock fastener to reach the set torque output value, the second body 18 will deflect a predetermined angle relative to the first body 16 ( Figure 2 ), and cause the head 30 to contact the conductive sheet 38, thereby generating a signal, which is transmitted to the counter 12 through the wires 40 and 44, causing the number displayed on the screen 34 of the counter 12 to be incremented by 1.

[0026] It should be noted here that in addition to the structure of the sensor 14 described in this embodiment, other devices that can detect the movement of the second body 18, such as microswitches, Hall elements, etc., can be applied to the present invention.

[0027] With the above-described structure, when using the torque wrench provided in this embodiment to rotate the fastener, when the set torque output value is reached, the second body 18 will deflect a predetermined angle relative to the first body 16. At this time, the sensor 14 will generate a signal and transmit it to the counter 12, causing the number displayed on the counter 12 to increase by 1, so as to understand the usage times of the torque wrench. When the number displayed on the counter 12 reaches a warning number of times (for example: 5,000 times), the user must perform a calibration procedure on the torque wrench to ensure that the torque wrench can provide the correct torque output value.

[0028] In addition, the torque wrench is further provided with a warning device 46, which is arranged on the holding portion 22 of the first body 16. When the number recorded by the counter 12 reaches the warning number of times, the warning device will issue a message to notify that the calibration procedure should be performed. In this embodiment, the warning device 46 has an LED lamp, which is arranged on the holding portion 22 and notifies the user through light. In other embodiments, the warning device can be a buzzer, display a message on the screen 34 of the counter 12, or other equivalent devices.

[0029] The above are the preferred embodiments and drawings of the present invention. However, the preferred embodiments and drawings are only examples and are not used to limit the scope of the rights of the technology of the present invention. Those implemented by equivalent technical means or within the scope of the rights covered by the following "claims for patent application" do not depart from the scope of the present invention and are within the scope of the rights of the applicant.

Claims

1. A torque wrench with a counting function, characterized in that, Comprising: A wrench body, including a first body and a second body. The second body has a driving part and an extension part; the extension part is connected to the first body; the driving part is connected to a locking member. Rotating the wrench body applies a torque to the locking member. When the torque reaches a preset torque output value, the second body will deflect a predetermined angle relative to the first body; A counter, disposed on the wrench body, displaying numbers; and A sensor, disposed on the wrench body, for detecting the movement of the second body.

2. The torque wrench with a counting function as claimed in claim 1, wherein, The sensor has a switch, disposed on the first body and corresponding to a head of the second body; after the second body deflects the predetermined angle, the head will contact the switch to generate a signal and transmit it to the counter.

3. The torque wrench with a counting function according to claim 2, characterized in that, The switch has a conductive sheet and two wires. The conductive sheet is disposed on the first body. One of the two wires connects the conductive sheet and the counter, and the other connects the head and the counter.

4. The torque wrench with a counting function according to claim 3, characterized in that, An insulator is provided between the conductive sheet and the first body.

5. The torque wrench with a counting function according to claim 1, characterized in that, The counter has a screen and a power supply. The screen is controlled to display numbers, and the power supply provides power to the screen.

6. The torque wrench with a counting function according to claim 1, wherein, It further includes a warning device, connected to the counter. When the number on the counter reaches a warning count, the warning device emits a message to notify the user.

7. The torque wrench with a counting function as described in claim 6, characterized in that, The warning device has an LED light, disposed on the first body, and notifies the user through light.

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