Counting device for torque wrench

Abstract

A counting device for a torque wrench is arranged on the torque wrench, and the torque wrench is provided with a first body and a second body. The second body is provided with a driving part for being combined with a locking piece; when the torsion operator rotates the employed member to a predetermined torsion, the second body deflects at an angle. The technical device comprises: a housing fixed to a first body of the torque wrench; the counter is arranged on the shell; the sensor is arranged on the shell and is used for detecting the movement of the torsion 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 display part of the counter is added with 1. The torque wrench can be additionally arranged on a common torque wrench, and the use times of the torque wrench can be recorded.

Description

Technical Field

[0001] The utility model relates to an auxiliary device for hand tools, especially a counting device for torque wrenches. Background Art

[0002] A conventional torque wrench has a first body and a second body. The first body has a grip 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 provided in the second body and is connected to the extension portion of the second body. The torque module allows a user to set a predetermined torque value. When the user operates the wrench to rotate a fastener (e.g., 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 at 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 aforementioned wrench requires the user to calibrate the wrench after using it 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 period (e.g., one year), and when the period expires, they perform the calibration procedure on the wrench. However, the number of uses within the period is not fixed. If the use within the period is very frequent, the wrench will quickly be unable to provide a correct torque output, resulting in an inability to provide a correct torque in the second half of the period. However, obviously, it is impractical to require the user to record the number of times the wrench is operated each time they work. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a counting device for torque wrenches, which can be installed on a general torque wrench and record the number of times the torque wrench is used.

[0005] To achieve the above-mentioned utility model purpose, the present utility model discloses a counting device for use with a torque wrench, which is installed on a torque wrench. The torque wrench has a first body and a second body; the second body is connected to the first body; the second body has a driving part, and the driving part is connected to a locking member; when the first body is rotated by applying force to apply 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. The counting device for use with a torque wrench includes: a housing; a connecting member disposed on the housing for fixing the housing to the first body of the torque wrench; a counter disposed in the housing; the counter has a display part exposed outside the housing; the display part can display numbers; and a sensor disposed in the housing for detecting the movement of the second body; when the sensor detects that the second body deflects the predetermined angle, the sensor generates a signal and transmits it to the counter, causing the number displayed by the display part of the counter to increase by 1.

[0006] In one embodiment, the sensor has an extension rod and a switch; the extension rod has a connecting end and a sensing end; the connecting end is located outside the housing and is provided with a coupling member; the coupling member is connected to the second body of the torque wrench; the sensing end is located in the housing and corresponds to the switch; when the second body of the torque wrench deflects the predetermined angle relative to the first body, it can drive the sensing end of the extension rod to activate the switch to generate the signal, causing the number displayed by the display part of the counter to increase by 1.

[0007] In one embodiment, the extension rod has a ball located between the connecting end and the sensing end; the housing is provided with a ball groove for accommodating the ball, so that the extension rod swings with the ball as a fulcrum.

[0008] In one embodiment, the switch has two electrodes and an activation part; the two electrode plates are disposed in the housing and are respectively electrically connected to the counter; the activation part is disposed at the sensing end of the extension rod and is also electrically connected to the counter; when the second body of the torque wrench deflects the predetermined angle relative to the first body, the extension rod can drive the activation part to contact one of the two electrodes to generate the signal, causing the number displayed by the display part of the counter to increase by 1.

[0009] In one embodiment, the two electrodes are elastic; when the activation part contacts the electrode, the electrode will deform; and when the activation part leaves, the electrode will return.

[0010] In one embodiment, the coupling member is a magnet that adsorbs to the driving part of the second body of the torque wrench.

[0011] In one embodiment, the counter has a warning device, and when the number of the counter reaches a warning number of times, the warning device issues a message to notify the user.

[0012] In one embodiment, the warning device has an LED lamp to notify the user by light.

[0013] The following are preferred embodiments given according to the purpose and efficacy of the present utility model, and will be described in detail with reference to the accompanying drawings. Description of the Drawings

[0014] Figure 1 is a perspective view of a preferred embodiment of the present utility model.

[0015] Figure 2 is a top view of a preferred embodiment of the present utility model, showing the technical device installed on the torque wrench.

[0016] Figure 3 is a side view of a preferred embodiment of the present utility model, showing the technical device installed on the torque wrench.

[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 is a cross-sectional view of a preferred embodiment of the present utility model, showing the state where the sensor detects that the torque wrench reaches the predetermined torque output value. Detailed Description of the Preferred Embodiments

[0019] Please refer to Figures 1 to 5 As shown, the counting device 10 for use with a torque wrench disclosed in a preferred embodiment of the present utility model is installed on a conventional torque wrench 1. The torque wrench 1 has a first body 2, a second body 3 and a torque module (not shown in the figure). The first body 2 has a grip portion 4 and a handle portion 5. The diameter of the grip portion 4 is larger than that of the handle portion 5. The handle portion 5 is hollow and the torque module is installed therein. The second body 3 has a driving portion 6 for connecting a fastening member (not shown in the figure, such as a bolt or a nut). One end of the second body 3 extends into the handle portion 5 of the first body 2 and is connected to the torque module. When the user operates the torque wrench 1 of the preferred embodiment of the present utility model to rotate a fastening member, and when the torque applied by the torque wrench 1 to the fastening member reaches the set torque output value, the second body 3 will deflect an angle relative to the first body 2 to notify the user that the fastening member has reached the predetermined torque value and the rotation can be stopped. The above-described torque wrench 1 is a conventional device, and its detailed structure will not be described herein. Readers can obtain the detailed content of the above components in US7,451,674.

[0020] The counting device 10 provided by the preferred embodiment of the present utility model includes: a housing 12, a connecting member 14, a counter 16, and a sensor 18. The connecting member 14 detachably fixes the housing 12 to the handle portion 5 of the first body 2 of the torque wrench 1. In this embodiment, the connecting member 14 is a tie ring, connected to the bottom surface of the housing 12, which can surround the handle portion 5 and reduce its diameter, thereby stably connecting the housing 12 to the handle portion 5 of the first body 2 of the torque wrench 1. In other embodiments, the connecting member 14 can be a strap, a magic tape, a magnet, glue, or other equivalent devices. The counter 16 is disposed in the housing 12 and has a display portion 20, which is exposed outside through an opening on the top surface of the housing 12. In this embodiment, the counter 16 is an electronic counter 16, and the display portion 20 is a screen that can display numbers. The counter 16 has an alarm 22. When the number of the counter 16 reaches an alarm number (for example, 5,000 times), the alarm 22 sends a message to notify the user. In this embodiment, the alarm 22 is an LED lamp, which notifies the user through light. In other embodiments, the alarm 22 can be a buzzer or display a message on the display portion 20 of the counter 16, or other equivalent devices. The sensor 18 is used to detect whether the driving portion 6 of the second body 3 of the torque wrench 1 is deflected by a predetermined angle relative to the first body 2. In this implementation, the sensor 18 has an extension rod 24, a coupling member 26, and a switch 28. The extension rod 24 has a connection end 30 and a sensing end 32. The sensing end 32 is located in the housing 12 and is connected to the switch 28; the connection end 30 is located outside the housing 12 and is provided with the coupling member 26. In this embodiment, the coupling member 26 is a magnet, which is adsorbed to the driving portion 6 of the second body 3 of the torque wrench 1. A ball 38 is provided between the connection end 30 and the sensing end 32 of the extension rod 24, and a ball groove 40 is provided in the housing. The ball 38 is received in the ball groove 40, so that the extension rod 24 swings with the ball 38 as the pivot point. Thus, when the driving portion 6 of the second body 3 of the torque wrench 1 is deflected by a predetermined angle relative to the first body 2, the sensing end 32 of the extension rod 24 can be synchronously driven to swing by an angle. In this embodiment, the switch 28 has two electrodes 34. One end of the two electrodes 34 is connected to the counter 16, and the other end is fixed to the housing 12, so that the middle portion of the two electrodes 34 has elasticity. The switch 28 further has an activation portion 36, which is disposed at the sensing end 32 of the extension rod 24 and is located between the two electrodes 34. The activation portion 36 is electrically connected to the counter 16 through a wire (not shown in the figure). When the second body 3 of the torque wrench 1 is deflected by the predetermined angle relative to the first body 2, the extension rod 24 can drive the activation portion 36 to contact one of the two electrodes 34 to generate a signal, so that the number displayed on the display portion 20 of the counter 16 is incremented by 1.In addition to the structure of the sensor 18 described in this embodiment, other devices that can detect the movement of the second body 3, such as microswitches, Hall elements, etc., can be applied to the present utility model.

[0021] With the above-described structure, when a user wants to install the counting device 10 of this embodiment on a torque wrench 1, first, the housing 12 is fixed to the handle 5 of the torque wrench 1 by the connecting member 14. Then, the engaging member 26 (magnet) on the extension rod 24 is adsorbed on the driving portion 6 of the second body 3 of the torque wrench 1, and the assembly is completed. After that, when the user uses the torque wrench to rotate the fastener, when the set torque output value is reached, the sensor 18 will detect that the second body 3 is deflected by a predetermined angle relative to the first body 2, causing the number displayed by the counter 16 to increase by 1, so as to understand the usage times of the torque wrench 1. When the number displayed by the counter 16 reaches a warning number of times (for example: 5,000 times), the warning device 22 will notify the user that the torque wrench 1 needs to perform a calibration procedure to ensure that the torque wrench 1 can provide the correct torque output.

[0022] The above are the preferred embodiments and design drawings of the present utility model. However, the preferred embodiments and design drawings are only examples and are not used to limit the scope of rights of the present utility model. Those who implement with equivalent technical means or within the scope of rights covered by the "claims" do not depart from the scope of the present utility model and are within the scope of rights of the applicant.

Claims

1. A counting device for a torque wrench, characterized in that, Installed on a torque wrench, where the torque wrench has a first body and a second body; the second body is connected to the first body; the second body has a driving part, and the driving part is connected to a fastener; apply force to rotate the first body to apply a torque to the fastener. When the torque reaches a preset torque output value, the second body will deflect a predetermined angle relative to the first body; the counting device for use with the torque wrench includes: A housing; A connecting piece, disposed on the housing, for fixing the housing to the first body of the torque wrench; A counter, disposed in the housing; the counter has a display part, which is exposed outside the housing; the display part can display numbers; and A sensor, disposed in the housing, for detecting the movement of the second body; when the sensor detects that the second body deflects the predetermined angle, the sensor generates a signal and transmits it to the counter, causing the number displayed by the display part of the counter to increase by 1.

2. The counting device for use with a torque wrench according to claim 1, characterized in that, The sensor has an extension rod and a switch; the extension rod has a connecting end and a sensing end; the connecting end is located outside the housing and is provided with a coupling piece; the coupling piece is connected to the second body of the torque wrench; the sensing end is located in the housing and corresponds to the switch; when the second body of the torque wrench deflects the predetermined angle relative to the first body, it can drive the sensing end of the extension rod to activate the switch to generate the signal, causing the number displayed by the display part of the counter to increase by 1.

3. The counting device for a torque wrench according to claim 2, characterized in that, The extension rod has a ball, located between the connecting end and the sensing end; the housing is provided with a ball groove for accommodating the ball, so that the extension rod swings with the ball as a fulcrum.

4. The counting device for use with a torque wrench according to claim 2, wherein, The switch has two electrodes and an activation part; the two electrode pieces are disposed in the housing and are respectively electrically connected to the counter; the activation part is disposed at the sensing end of the extension rod and is also electrically connected to the counter; when the second body of the torque wrench deflects the predetermined angle relative to the first body, the extension rod can drive the activation part to contact one of the two electrodes to generate the signal, causing the number displayed by the display part of the counter to increase by 1.

5. The counting device for use with a torque wrench according to claim 4, characterized in that, The two electrodes are elastic; when the activation part contacts the electrode, the electrode will deform; and when the activation part leaves, the electrode will return.

6. The counting device for a torque wrench according to claim 2, wherein, The coupling piece is a magnet, which is adsorbed on the driving part of the second body of the torque wrench.

7. The counting device for use with a torque wrench according to claim 1, characterized in that, The counter has a warning device, when the number of the counter reaches a warning number of times, the warning device emits a message to notify the user.

8. The counting device for use with a torque wrench according to claim 7, characterized in that, The warning device has an LED light, which notifies the user through light.

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