KR100397194B1 - Torque driver - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a torque driver capable of measuring torque rate more efficiently without being affected by the shape of a screw part such as a screwing part, which is twisted, and a rotating shaft for transmitting torque, and a torque. And an angle reader having an orientation guide that rotates in a direction opposite to the direction of rotation of the rotary shaft relative to the axis of rotation, and an angle reading plate that rotates in synchronization with the axis of rotation. It is characterized in that it is configured to read the azimuth angle pointing.

Description

Torque Driver {TORQUE DRIVER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque driver that torques a threaded component and rotates it to twist into a machined threaded hole of the threaded component.

When screwing a screwed part into a screwed-in part, it is required to manage the torque rate obtained by dividing the torque by the rotation angle and to perform the screwing operation under an appropriate torque rate. For this reason, it is necessary to measure the rotational angle of a fastening torque and a screw component.

In the conventional torque driver 21, the driver bit 25 is connected to the torque driver 21 as shown in FIG. 3B, which is an AA arrow view in the same drawing as in FIG. 3A, and the torque driver 21 21 rotates the driver bit 25. The driver bit 25 is engaged with the screw part 23, and the screw part 23 is rotated to twist the screw part 23 to the screwing part 24 to perform a fastening operation. In order to find the torque rate during this fastening operation, the fastening torque and the rotation angle of the screw part 23 were measured as follows.

The tightening torque is measured by the torque scale plate 33 and the instructions 34 of the torque measuring device 32 (indicated by the broken line in the drawing) attached to the torque driver 21. On the other hand, the rotation angle of the screw component 23 has an angle scale plate 26 which is a 2π (360 degree) protractor with a hole in the center on the outer circumference of the screw component 23 for measuring the rotation angle, and the driver bit 25 It is obtained by reading the angle indicated on the angle scale plate 26 by the guide 31 attached thereto. At this time, the angular scale plate 26 is installed so that the screw part 23 passes through the center hole of the angular scale plate 26. As described above, since the driver bit 25 rotates the screw part 23 in accordance with the screw part 23, the rotation angle of the driver bit 25 is equal to the rotation angle of the screw part 23.

According to the conventional torque driver 21 as described above, since the angular scale plate 26 is placed on the outer circumference of the screw part 23, the shape of the screwing part 24 in which the screw hole is processed, or the screw part 23 According to the shape of the attachment part (not shown in FIG. 2) which is attached to the torsion part 24 by (), the angle scale plate 26 may not be provided. Therefore, the portion to measure the torque rate was limited, the work efficiency was not good.

Therefore, an object of the present invention is to provide a torque driver which can measure torque rate more efficiently without being affected by the shape of the place where the screwing part of the twisted part and the attachment part are twisted.

In order to achieve the above object, a torque driver 1 according to the invention according to claim 1 includes, for example, a rotating shaft 5 for transmitting torque as shown in FIG. 1; A torque measuring device (12) for measuring the torque; An angle reader (6) having an orientation guide (11) which rotates in a direction opposite to the direction of rotation of the rotary shaft (5) relative to the rotary shaft, and an angular scale plate (8) which rotates in synchronization with the rotary shaft (5) and; The angle reader 6 is configured to read the angle of the azimuth indicated by the azimuth guide 11.

In this configuration, since the angle reader is provided, it is not necessary to put the angle scale plate on the outer circumference of the screw part in order to measure the rotation angle of the rotating shaft. Even when fastening screw parts placed in places where the angle scale plate cannot be placed, the angle of rotation of the screw parts can be measured by the angle reader provided in the torque driver.

That is, the direction guide points the direction of the north and south directions absolutely one direction with respect to the earth, and the direction indicated by the direction guide is not affected by the torque driver rotation. Therefore, in consideration of the difference between the angle after rotation and the angle before the rotation on the angle scale indicated by the azimuth guide, and the number of rotations of the angle scale, the rotation angle of the rotation axis can be read. The angle of rotation of the axis of rotation is equal to the angle of rotation of the screw part with respect to the twisted part. On the other hand, the tightening torque of the screw parts can be measured by a torque meter. Therefore, the torque rate can be obtained by dividing the measured tightening torque by the measured rotation angle.

Also, the orientation guide typically rotates relative to the axis of rotation about the center axis of the axis of rotation. The rotation of the angular scale plate in synchronism with the rotation axis means that the angular scale plate rotates when the rotation axis rotates, and that the angular scale plate rotates so that the rotation angle of the rotation axis is read by the angle scale plate. The angle scale plate may be rotated about the center axis line of the rotation axis.

The torque driver according to the invention according to claim 2 is the torque driver according to claim 1, wherein the angle reader has a substantially bowl-shaped transparent cover covering the angle scale plate, a sealed gas and a liquid, When the inside of the cover is accommodated and the rotation axis is directed in the vertical direction, the base is located at the center of the inside of the cover, and when the rotation axis is directed in the direction tilted by (pi) / 2 (90 degrees) from the vertical direction, The center line is configured to be located on an interface between the gas and the liquid.

With this configuration, the angle driver includes an angle reader in which gas and liquid are enclosed, and when the rotation axis is directed in the vertical direction, since the gas is located at the center of the inner side of the lid, the torque driver is positioned in the vertical direction based on the position of the gas. It is possible to manage the posture, and since the orientation guide indicates north and south, the rotation angle can be read using the orientation guide.

When the torque driver is directed in the direction of tilting π / 2 (90 degrees) from the grinding direction, the angle reader is configured so that the enclosed gas and the liquid have the same volume, and the center line of the rotation axis is located on the interface between the liquid and the gas. Therefore, the boundary surface can be used as a reference surface for angle measurement.

That is, since the boundary surface is horizontal and is not affected by the torque driver rotation, the rotation angle of the torque driver rotation shaft can be obtained using the boundary surface as a reference plane. Considering the difference between the angle after the rotation of the angular scale indicated by the boundary and the angle before the rotation, and the number of rotations of the angular scale, the angle of rotation of the screwed part with respect to the inserted component can be obtained.

1: (A) is a schematic front view which shows the torque driver and a workpiece which concern on embodiment of this invention, (B) is a schematic plan view.

2 is a detailed cross-sectional view of the angle reader.

3: (A) is a typical front view which shows the conventional torque driver and a workpiece | work, (B) is the A-A arrow view of (A).

<Explanation of symbols for the main parts of the drawings>

1: torque driver

2: walk

3: screw parts

4: twisted parts

5: driver bit

6: angle reader

7: cover

8: angle scale

9: gas

10: liquid

11: Defense Guidelines

11X: axis

12: torque meter

13: torque scale plate

14: instructions

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to drawings.

Fig. 1A is a torque driver 1 according to an embodiment of the present invention, and a work 2 (screw part 3, a twisting part) which is carried out by a torque driver 1 for fastening operation. It is a typical front view which shows 4)). 1B is a schematic plan view.

A driver bit 5 as a rotating shaft is connected to the lower end of the torque driver 1, the driver bit 5 is engaged with the screw part 3, and the screw part 3 is rotated by the rotation of the driver bit 5. It is twisted into the feed part 4.

An angle reader 6 is attached to the upper end face of the torque driver 1.

A description with reference to FIGS. 1 and 2 is as follows. 2 is a detailed cross-sectional view of the angle reader 6. The angle reader 6 includes a hemispherical bowl-shaped transparent cover 7 and a disc-shaped angle scale plate 8. In the angle reader 6, the same volume of gas 9 and liquid 10 are included. Is enclosed and the orientation guide 11 is housed. The axis 11X of the azimuth guide 11 is attached to the center top point of the inner surface of the lid 7, and is rotated freely. The center of rotation of the orientation guide 11 passes through the center of the angular scale plate 8 and coincides with the center of rotation of the driver bit 5. When the angle reader 6 is placed in a horizontal state, a layer of gas 9 is formed on the upper side of the liquid 10 layer in the vertical direction, and the orientation guide 11 is attached to rotate in the layer of gas 9.

The axis 11X of the orientation guide 11 is described as being attached to the center top point of the inner surface of the lid 7, but the orientation guide 11 may be floated on the liquid surface of the liquid 10. .

When the torque driver 1 is in a position to position the center of rotation of the driver bit 5 in the vertical direction, the angular scale plate 8 is in a horizontal state, and the azimuth guide 11 is attached to the angular scale plate 8 at this time. Installed in parallel, i.e., horizontally. When the driver bit 5 is rotated in this state (also when the torque driver 1 is rotated), the azimuth guide 11 typically points to the north and south directions in an absolute direction. In other words, it can be said that the orientation guide 11 is relatively rotated in the direction opposite to the rotation direction of the driver bit 5.

On the other hand, the angle scale plate 8 is connected to the driver bit (5) is accompanied by the rotation of the driver bit (5) to rotate only the same angle in the same direction, the angle indicated by the azimuth guide is configured to increase, 0 (0 degrees ) Is engraved with a scale of 2π (360 degrees). That is, the angular scale plate 8 is a 2π (360 degree) protractor. Accordingly, the angle θ21 indicates the orientation guide 11 on the angular scale plate 80 after the rotation of the angular scale plate 8 and the angle indicated by the orientation guide 11 on the angular scale plate 8 before the rotation of the angular scale plate 8. From the difference (θ11) and the number N1 of rotation of the angular scale plate 8, the rotation angle θ1 (that is, the rotation angle of the screw part 3) of the driver bit 5 is θ1 = θ21−θ11 + 2π × N1 It can be obtained from the equation (rad), except that 0 ≦ θ11 <2π, 0 ≦ θ21 <2π, and θ21 is calculated as θ21 + 2π when θ11> θ21.

Before turning the driver bit 5, 0 (0 degrees) of the angle scale plate 8 may be reset to the north direction. That is, only the angle scale plate 8 may be preliminarily rotated (or the driver bit 5 and the angle scale plate 8 prerotated before being engaged with the screw component 3) so that θ11 = 0 can be achieved.

Next, the case where the torque driver 1 rotates (tilts) the center of rotation of the driver bit 5 from the vertical direction by π / 2 (90 degrees) and takes a posture toward the horizontal direction will be described. In this case, since the gas 9 and the liquid 10 of the same capacity are enclosed in the angle reader 6, the interface between the gas 9 and the liquid 10 is in a horizontal position, and the azimuth guide 11 axis ( Coincides with the center axis of 11X). In addition, when the torque driver 1 is rotated, that is, when the angular scale plate 8 is rotated through the center top of the cover 7 and the center of the angular scale plate 8, the boundary surface is typically Keep it horizontal.

Therefore, the difference between the angle [theta] 22 which the boundary surface points on the angle scale plate 8 after the rotation of the angle scale plate 8, and the angle [theta] 12 which the boundary surface points on the angle scale plate 8 before the rotation of the angle scale plate 8 rotates. The rotation angle θ2 of the driver bit 5 (screw part 3) can be obtained from θ2 = θ22−θ12 + 2π × N2 (rad) from the number N2 of the angle scale plate 8 rotated. However, when 0 ≤ θ12 <2π, 0 ≤ θ22 <2π, and θ12> θ22, θ22 is calculated as θ22 + 2π.

The scale of 0 (0 degrees) of the angle scale plate 8 may be reset in the horizontal direction before the driver bit 5 rotates. That is, the angle scale plate 8 may be preliminarily rotated (or the driver bit 5 and the angle scale plate 8 prerotated before being engaged with the screw component 3) so that θ12 = 0 may be possible.

The torque driver 1 includes a torque measuring device 12 (indicated by a broken line in the drawing) for measuring the value of the tightening torque, a torque graduation plate 13 of the torque measuring device 12 attached to the torque driver 1, and torque A guide 14 is provided which indicates the value, and the value of the tightening torque is indicated on the torque scale plate 13 by the guide 14. The torque measuring instrument may display the maximum value of the tightening torque by a display changeover button (not shown). In addition, the torque driver 1 may be provided with the rotation speed measuring device which measures rotation speed N1, N2, and the rotation speed guide | guide device which instructs rotation speed N1, N2.

According to the torque driver 1 of this embodiment as mentioned above, it does not need to place the angular scale plate 8 in the outer periphery of a screw part on a twisted part, and arrange | positions in the place where the angular scale plate 8 cannot be placed. The rotation angle of the screw part 3 can also be measured when tightening the screw part. Therefore, high torque rate can be measured by not being influenced by the shape of the place where the screwed part of the twisted part is twisted.

As described above, according to the present invention, since the torque driver and the angle reader having the azimuth guide and the angular scale plate are installed in the torque driver, the tightening torque when the screw parts are twisted into the screwing parts and the rotation angle of the screw parts are respectively torqued. It is possible to obtain the torque rate by measuring without being affected by the shape of the place where the screw parts such as the screwed part are twisted by the measuring device and the angle reader.

Claims (2)

A rotating shaft for transmitting torque; A torque measuring device for measuring the torque; An angle guide provided at an upper end of the rotating shaft and rotating in a direction opposite to the rotating direction of the rotating shaft relative to the rotating shaft, and an angle scale plate provided at an upper portion of the rotating shaft to rotate in synchronization with the rotating shaft; Having a reader; And the angle reader is configured to read an angle of the azimuth indicated by the azimuth guide. The method of claim 1, When the angle reader has a substantially bowl-shaped transparent cover covering the angle scale plate, a sealed gas and a liquid, the orientation guide is stored inside the cover, and the rotation axis is directed in the vertical direction, the body is covered by the cover. Located in the center of the inner side, the torque driver, characterized in that configured to be located on the interface between the gas and the liquid, the center line of the rotation axis when the direction of rotation is in the direction of inclined (pi / 2) (90 degrees) from the vertical direction .