JP3079165U - Spanner device capable of displaying torque value - Google Patents

Abstract

(57) [Summary] To provide a spanner device capable of displaying a torque value. SOLUTION: The electrical resistance in the material is directly proportional to the unit length and inversely proportional to the area, and the difference in resistance coefficient is utilized to convert the resistance change amount into a voltage via a Wheatstone bridge circuit and output the voltage. An analog signal is converted to a digital signal by an amplifier and a data processor, the magnitude of the output amount is displayed by an output device, and the resistance inside the spanner is composed of a detection element such as a strain gauge or a piezoelectric transistor provided with a resistance. And, by communicating the strain gauge with one matching element, a torque value display is achieved, or the magnitude of the torque value of the spanner is notified by a lamp and / or a buzzer.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a kind of spanner device capable of displaying a torque value.

[0002]

[Prior art]

 In general, hand tools need to be used irrespective of the type of equipment in terms of application, and they are widely used for assembling various mechanical structures because they are convenient and inexpensive. In particular, the use in the automotive industry is typical, but when using tools, there were accidents in which the spanner ruptured and hurt the human body, or the ruptured parts hurt the human body. For this reason, it is necessary to know the value of the safe force that the spanner can withstand and how much force should be used to operate the screw parts during use, which is convenient for attaching and detaching nuts and other parts. In addition, the safety of operation can be increased.

Most of the current torque displays employ an electronic type shown in FIG. 10 or a photo-sensitive electronic type shown in FIG. 11, and the volume is enormous, affecting the convenience of use. It could not be used in certain areas, and it was relatively inaccurate and had a tendency to generate elastic fatigue due to a machine with a spring inside or a slightly set value.

[0004]

[Problems to be solved by the invention]

 Therefore, there has been a demand for a spanner device capable of displaying a torque value suitable for mass production and suitable for public use.

[0005] Therefore, a main object of the present invention is to provide a kind of spanner device capable of displaying a torque value, and to know how much torque the spanner receives during the operation process, and to improve the safety of the hand-held tool. And to maintain the compatibility with the articles turned by the spanner.

[0006]

[Means for Solving the Problems]

 The invention of claim 1 utilizes the fact that the electrical resistance is directly proportional to the unit length and inversely proportional to the area, and utilizing the difference in the resistance coefficient, converts the resistance change amount into a voltage via a Wheatstone bridge circuit, and outputs the voltage. An amplifier and a data processor convert an analog signal to a digital signal, output the digital signal to an output device, and the output device displays the magnitude of the output value. . The invention of claim 2 is based on the fact that a sensing element such as a strain gage provided with a resistor, a piezoelectric transistor, or the like is provided in a spanner, and one matching element is provided at the center of the spanner, and is mutually conductive with the strain gage. The spanner capable of displaying a torque value according to claim 1, characterized in that the change in the force value of the strain gauge is known to inform the user of the spanner that the matching element has a display screen, a color lamp and a buzzer. It is a device.

[0007]

[Embodiment of the invention]

As shown in FIG. 2, S is the length of the arc, l ₂ is the unit length of the force receiving force, and C is the force receiving point. After the force receiving, when S> δ2, deflection occurs, and the strain gauge 2 It deforms and transmits the signal of the Wheatstone bridge voltage, and outputs a signal. Similarly, when the torsion angle φ of a circle, for example, a sleeve receives a torque T, an angle change is generated, the voltage is changed, and the output is changed. , F is the applied force, l is the length, A is the unit area, ρ is the resistance coefficient, and resistance R = ρ × l / A. The present invention is a wrench device capable of displaying torque values, utilizing the fact that the electrical resistance in the material is directly proportional to the unit length and inversely proportional to the area, and adding a difference in the resistance coefficient of the material, via a Wheatstone bridge circuit. The amount of resistance change is converted to a voltage and output, the signal is amplified by an amplifier, the analog signal is converted to a digital signal by a data processor, the digital signal is displayed by an output device, and the output is output by an output device. Displays the magnitude of the value. This is as shown in the flowchart of FIG.

As shown in FIGS. 4, 12, and 13, the spanner device capable of displaying a torque value according to the present invention is provided in a spanner 1 and strain gauges 2 having a known resistance are provided on both sides of the spanner 1. Provided, and one matching element 3 is fitted into the center of the spanner 1 and communicates with the strain gauge 2 to know a change in the force value of the strain gauge 2, and the matching element 3 is connected to the display screen and the color. Equipped with lamps and buzzers, notify users and achieve their safety objectives.

It should be noted that the structure of the present invention can be widely applied to other tools, for example, as shown in FIGS. 6 to 9, which show a preferred embodiment of the present invention and 3 and FIG. 5 show an embodiment of the spanner having two display devices according to the present invention, and thus the application range of the device of the present invention is wide.

The embodiments described above are provided to explain the present invention, and do not limit the scope of the present invention, and any modification or alteration of details that can be made based on the present invention is not limited to the present invention. It shall belong to the claims of the invention.

[0011]

[Effect of the invention]

 The present invention makes it possible to know how much torque the spanner is receiving during the operation process, and to display the torque value that can maintain the safety of hand tools and the compatibility with the articles turned by the spanner. It provides a new spanner device, which is a device with practicality, novelty, inventive step, and industrial value.

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a material force analysis diagram of the present invention.

FIG. 3 is a perspective view of another embodiment of the double-sided display panel of the present invention.

FIG. 4 is a sectional view showing a combination of the spanner of the present invention;

FIG. 5 is a cross-sectional view of another embodiment of the double-sided display panel of the present invention.

FIG. 6 is an embodiment of the application of the present invention to a ratchet spanner.

FIG. 7 is an embodiment of the application of the present invention to a sleeve spanner.

FIG. 8 is another embodiment of the application of the present invention to a sleeve spanner.

FIG. 9 is an embodiment of the application of the present invention to a screwdriver.

FIG. 10 is a display diagram of a conventional digital display type spanner.

FIG. 11 is a display diagram of a conventional photo-sensitive digital display spanner.

FIG. 12 is a cross-sectional view of the spanner of the present invention viewed from another direction.

FIG. 13 is a perspective view of the spanner of the present invention.

[Explanation of symbols]

 1 spanner 2 strain gauge 3 matching element

Claims (2)

[Utility model registration claims] An electric resistance is converted into a voltage through a Wheatstone bridge circuit and output by utilizing a fact that an electric resistance is directly proportional to a unit length and is inversely proportional to an area, and a difference in a resistance coefficient, and an amplifier, A spanner device capable of displaying a torque value, wherein the data processor converts an analog signal into a digital signal, outputs the digital signal to an output device, and the output device displays the magnitude of the output value. 2. A strain gauge, comprising a strain gauge provided with a resistor, a detecting element such as a piezoelectric transistor, and a matching element provided in the center of the spanner, and electrically connected to the strain gauge. 2. A spanner device capable of displaying a torque value according to claim 1, wherein the matching element is provided with a display screen, a color lamp, and a buzzer, and informs a spanner user of the change of the force value.