CN1378644A

CN1378644A - Torque tester

Info

Publication number: CN1378644A
Application number: CN00814129A
Authority: CN
Inventors: 元英钟
Original assignee: HWAIN INSTRUMENT CORP
Current assignee: HWAIN INSTRUMENT CORP
Priority date: 1999-01-21
Filing date: 2000-08-11
Publication date: 2002-11-06
Also published as: WO2002018895A1; KR20000051376A; KR100355960B1

Abstract

The present invention relates to the torque tester which is very precise with simple operation. Since the torque tester in accordance with the present invention includes a torque sensor for sensing the torque applied; an adaptor for adjusting gain of inputted sense signal from the torque sensor and outputting gain-adjusted sense signal as display signal; and a digital multimeter for displaying a numerical number corresponding the value of the display signal form the adaptor on the display panel, the user can check whether bolt or nut is screwed adequately by numerical number displayed on display panel while screwing them after connecting torque sensor to digital multi-meter through adaptor. Thus the convenience of using is provided and the simplicity operating is accomplished.

Description

Torque tester

Technical field

Whether the present invention relates to torque tester, more specifically, relate to a kind of like this torque tester, it can be when the user installation motor car engine, guarantee that the user can check with his needed moment of torsion bolt and nut to be screwed fully.

Background technology

Typically, the magnetic torque gauge that is used to measure rotary power can be divided into two kinds, absorption-type and transmission type.Absorption-type comprises a friction force instrument, it absorbs the power that is produced by motor by the friction between the solid, one waterpower instrument, it absorbs by the spinner excitation power that water produced, one Air Force instrument, it absorbs a power and an electric instrument by placing airborne rotary fan to produce, and it is measured by generator or consumes the electric power that electric loading produced of this power.

Transmission type torque gauge comprises a distortion power tester, the distortion power of its measurement axis, and this is sent to this power one load and bears the distortion power that is directly proportional with this moment of torsion.In addition, the angle from the method that is used to test distortion power can also have multiple torductor.

Along with the rapid reduction of motor car engine weight, when the user was the assembling motor car engine, traditional torque tester can't check not only whether bolt and nut are fully screwed, and its operating process is very complicated, made the beginner feel to be difficult to operation.

In addition, if drive, then may cause fearful accident, and the machine oil abnormal combustion also can reduce combustion rate not using suitable moment of torsion to screw under the situation of bolt and nut owing to the leakage of engine oil.

Summary of the invention

For addressing the above problem, an object of the present invention is to provide a kind of can be accurately and the torque tester of simple operations.

For realizing purpose of the present invention, torque tester of the present invention comprises a torque sensor, be used to detect the moment of torsion that is applied, one adapter, be used to regulate gain from the detection signal of this torque sensor input, and export the detection signal of this gain as a shows signal and a digital multimeter through regulating, be used for and will be presented at display panel corresponding to numeral from the value of this shows signal of adapter.

Description of drawings

Describe preferred embodiment of the present invention in conjunction with the drawings in detail, above-mentioned purpose of the present invention and advantage will be more obvious.In the accompanying drawings:

Fig. 1 illustrates the structure of torque tester according to one preferred embodiment of the present invention;

Fig. 2 illustrates the circuit diagram of the torque sensor shown in Fig. 1;

Fig. 3 illustrates the detail circuits figure of the adapter shown in Fig. 1.

Embodiment

Referring now to accompanying drawing, describes in detail according to this preferred embodiment of the invention.

Fig. 1 illustrates structure according to an embodiment of the invention, with reference to figure 1, Ref. No. 10 refers to torque sensor, be used for detecting the moment of torsion that is applied on this chaser (screwing tool) 80, Ref. No. 20 refers to an adapter, be used to regulate from the gain of the detection signal of this torque sensor input and the detection signal of output gain as shows signal through regulating, Ref. No. 30 refers to a digital multimeter, is used for being presented at this display panel corresponding to the numeral from the value of this shows signal of adapter.

As shown in Figure 2, torque sensor 10 comprises a strainmeter 11, be used to regulate this digital multimeter 30 skew the first variable resistor VR1 and regulate the second adjustable resistance VR2 of the gain of this strainmeter 11.This torque sensor 10 be series at 6 in the output lead lead-in wire 1 and go between between 3 (here, the NC representative connects), this torque sensor 10 comprises two variable resistor VRG1 and VRG2, its tie point is connected in lead-in wire 2.

The second adjustable resistance VR2 is connected in lead-in wire 1 and goes between between 3, and is connected to lead-in wire 5 by resistance R 1.And the end of the first variable resistor VR1 is connected to lead-in wire 5, and the other end is connected to lead-in wire 4.

Although chaser 80 is made of a pipe wrench, this pipe wrench is generally suitable for bolt and nut, and it is not limited to this, and it can directly be spanner or screwdriver or the like.

Strainmeter 11 is fixed in the middle part of described chaser 80.

As shown in Figure 3, adapter 20 comprises an amplifier, and it amplifies the detection signal by each output input of torque sensor 10, and the result is sent to digital multimeter 30, one gain controller VR01, it controls the gain of this adapter 30 when adapter 20 is connected to digital multimeter 30, the switch of startup/rupturing operation pattern, and torque value shows 1b, ft and newton's value show N, m and as the LED of display device, it sends light signal when the user opens adapter 20.

The switch SW blocked operation is shown 1b to torque value, and ft or newton's value show N, and during the position of m, adapter 20 can be opened automatically.Be switched to the situation of " off " position in switch SW, adapter 20 cuts out.

Here, switch SW is placed in the top of adapter 20, so that the user can operate on it, and LED is placed in the position that the user can notice.

And gain controller VR01 is placed in the inboard of adapter, and it should manufactured merchant be controlled at optimum gain in manufacture process.

Among Fig. 3, the Ref. No. 22 of Miao Shuing does not refer to driving amplifier, in order to the driven for emitting lights diode (LED), the Ref. No. 23 of Miao Shuing does not refer to the OP amplifier that is used to the pattern of setting, it amplifies the difference between the output of the lead-in wire 4 of torque sensor 10 and amplifier 21, and the Ref. No. 24 of Miao Shuing does not refer to voltage regulator, and it provides voltage through adjusting to adapter 20, the Ref. No. 90 of Miao Shuing does not refer to a spanner, and the Ref. No. 92 of Miao Shuing does not refer to a bolt.

Below will describe operation in detail according to torque tester of the present invention.

At first, the user must regulate the skew of digital multimeter 30 and the gain of strainmeter 11 by regulating the first variable resistor VR1 and the second adjustable resistance VR2 respectively.

At this moment, the switch SW on the adapter 20 be in switch to the operation on-mode (on-mode) (ib.ft or N, state n), LED be in the emission light signal state.

Afterwards, if the user places bolt or nut in this torque sensor 10, and begin then to reverse, then the strainmeter 11 in this torque sensor 10 can change the torque axis that is applied into the correspondent voltage signal and this voltage signal is passed to adapter 20.The voltage signal of 21 pairs of inputs of amplifier of adapter 20 amplifies and sends this result to digital multimeter 30.As a result, will on display panel 40, show numeral corresponding to the current moment of torsion that applies.

Therefore, by referring to the numeral that is presented on the display panel 40, the user puts on the power of bolt or nut with regard to may command.

As mentioned above, according to the present invention, because the user can be after being connected to digital multimeter with torque sensor by adapter, when swivel bolt or nut, check by the numeral that is presented on the display panel whether it is fully tightened, so the present invention just possessed the convenience of use and the simplicity of operation.

On the other hand, the present invention is not limited to the above embodiments, but can in the scope of main points of the present invention it be made amendment or change, and this kind revised or technological thought after changing also should be regarded as the claim that belongs to appended.

Claims

1. torque tester comprises:

One torque sensor is used to detect the moment of torsion that is applied;

One adapter, be used to regulate from the gain of the detection signal of this torque sensor input and export this gain through the detection signal of adjusting as shows signal; With

One digital multimeter is used for and will be presented at display panel corresponding to the numeral from the value of the shows signal of this adapter.

2. according to the torque tester of claim 1, wherein, described torque sensor comprises:

Strainmeter is fixed in the middle part of chaser, be used to react on the moment of torsion that applied and output corresponding to the voltage signal of this moment of torsion and

First variable resistor is used to control the skew of described digital multimeter,

The second adjustable resistance is used to control the gain of described strainmeter.

3. according to the torque tester of claim 1, wherein, this adapter amplifies the detection signal from this torque sensor, and comprises:

Gain controller is used for controlling the gain of this adapter when this adapter is connected to this digital multimeter;

Be used in company with user's the operation switch of setting operation pattern together; With

Display device is used to show the state of current operation.

4. according to the torque tester of claim 3, wherein, this display device is a light emitting diode.