JP2006090968A - Level adjustment structure of torque calibrating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately calibrate a torque meter to be calibrated by extending each column part by the same amount. <P>SOLUTION: A level adjustment structure of a torque calibration apparatus 100 is provided with: a base part 1 having a first supporting member 7 axially and freely rotatably supporting a reference torque meter and installed in such a way that its upper surface is approximately horizontal; a head part 3 provided above the base part 1 and having a second supporting member 10 supporting the torque meter to be calibrated; and a plurality of the longitudinally extension- and contraction-free column parts 2 raised from the upper surface of the base part 1 and supporting the head part 3 at their upper ends. Each column part 2 is provided with both a piston part 21 having both a base end part 25 provided for the head part 3 and a tip part 26 having a diameter smaller than the base end part 25 and a cylinder part 22 provided for the base part 1 and receiving the insertion of the tip part 26. Each tip part 26 exposed to the outside from the inside of the cylinder part 22 is provided with a spacer 28 of the same height. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a level adjustment structure of a torque calibration device.

Conventionally, there is a torque calibration device that calibrates a torque meter (see, for example, Patent Document 1). Among these torque calibration devices, there is a so-called vertical type. Specifically, a reference torque meter serving as a calibration reference is attached to the base that is the lower end of the device, A torque meter to be calibrated is attached to the head portion supported by the column portion. Here, the reference torque meter and the torque meter to be calibrated are connected via a flange or an adapter, and the torque applied to the reference torque meter is transmitted to the torque meter to be calibrated via the flange or adapter. . Then, the torque meter to be calibrated can be calibrated by comparing the torque value detected from the reference torque meter with the torque value detected from the torque meter to be calibrated.
In addition, the torque meter calibration device has a column that can be expanded and contracted so that any size of torque meter can be calibrated. By extending the column, the space between the base and head can be increased to calibrate a large torque meter. can do.
JP 2001-133349 A

  However, when the column portions are extended, even if there is a slight difference in the amount of extension of each column portion, the head portion is inclined with respect to the base portion. If the head portion is tilted, the torque meter to be calibrated supported by the head portion is also tilted, so that there is a problem that accurate calibration of the torque meter to be calibrated cannot be performed.

  Accordingly, the present invention has been made to solve the above-described problem, and is a torque calibration device that can reliably extend each column portion by the same amount and can accurately calibrate a calibration target torque meter. An object is to provide a leveling structure.

  In order to solve the above problems, the invention described in claim 1 includes a first support member that rotatably supports a reference torque meter serving as a reference for calibration of the torque meter about an axis, and the upper surface is substantially horizontal. A base portion installed in such a manner, a head portion provided above the base portion and having a second support member for supporting a calibration target torque meter, and connecting the base portion and the head portion in the longitudinal direction. A level adjustment structure of a torque calibration device comprising a plurality of telescopic columns, each column having a base end provided on the head and a tip having a smaller diameter than the base end And a cylinder portion provided on the base portion and capable of inserting the tip portion, and a spacer having the same height is provided on each tip portion exposed to the outside from the inside of the cylinder portion. Features.

  According to a second aspect of the present invention, in the level adjustment structure of the torque calibrating device according to the first aspect of the present invention, it is provided with a fixing mechanism that is provided on the base portion and fixes the distal end portion to the base portion.

  According to a third aspect of the present invention, in the level adjustment structure of the torque calibration device according to the second aspect, the fixing mechanism is formed with an insertion hole into which the tip portion can be inserted and communicated with the insertion hole. A fixing member having a slit, an urging means that is provided between the slits and urges the slit in a direction to widen the slit, and is detachable with respect to the fixing member. And a tightening force applying means for applying a tightening force so as to narrow the width of the slit against the force.

  According to a fourth aspect of the present invention, in the level adjustment structure of the torque calibration device according to the third aspect, a second slit is formed outside the slit and the insertion hole.

  According to the first aspect of the present invention, when the plurality of column portions are extended in the longitudinal direction, the head portion is lifted upward. At this time, the tip portion of the piston portion provided in the head portion moves upward in the cylinder portion and is exposed above the cylinder portion. When a spacer having the same height is fitted into the exposed tip of the piston portion and the lifting of the head portion is released, the base end portion of the piston portion comes into contact with the upper end of the spacer, and the head portion is prevented from descending. Thereby, since the height from the upper end of a cylinder part to a head part becomes the same in each pillar part, a head part is maintained in parallel with a base, ie, horizontal. Therefore, each column part can be reliably extended by the same amount, and the to-be-calibrated torque meter can be calibrated accurately.

  According to the second aspect of the present invention, by fixing the distal end portion to the base portion by the fixing mechanism, the upper ends of the respective column portions are integrally fixed by the head portion, and the lower ends of the respective column portions are integrally fixed by the base portion. The Thereby, the rigidity of the substantially horizontal direction and the substantially vertical direction of the torque calibration device can be increased.

  According to the third aspect of the present invention, when the distal end portion of the piston portion is not fixed to the fixing member, the width of the slit is widened by the urging force of the urging means, so that the distal end portion can be easily inserted into the insertion hole. Can be done. On the other hand, when fixing the tip of the piston to the fixing member, the tip is inserted into the insertion hole, and the width of the slit is narrowed against the biasing force of the biasing means by the tightening force applying means. By applying a tightening force, the inner wall of the insertion hole tightens the tip of the cylinder portion. Thereby, the front-end | tip part of a cylinder part is fixed to a fixing member. Furthermore, in order to release the tip portion of the cylinder portion from the state fixed to the fixing member, by releasing the tightening force by the tightening force applying means, the width of the slit is expanded by the biasing force of the biasing means, The tip can be easily pulled out from the insertion hole. Therefore, it is possible to easily attach and detach the tip portion of the piston portion with respect to the fixing member by one operation of the tightening force applying means.

  According to the invention of claim 4, by forming the second slit outside the slit and the insertion hole, the impact applied to the fixing member from the outside can be relaxed and absorbed by the second slit. It is possible to prevent the insertion hole from cracking.

Hereinafter, the best mode of a torque calibration device and a torque calibration method according to the present invention will be described in detail with reference to the drawings.
<Configuration of torque calibration device>
As shown in FIG. 1, the torque calibration device 100 is formed in a substantially triangular prism shape, and has a base portion provided with a first support member that rotatably supports a reference torque meter serving as a reference for torque meter calibration around an axis. The base 1, the column 2 standing up at each corner of the base 1, and a column 2 that is extendable in the longitudinal direction, and the torque meter to be calibrated provided at the upper end of the column 2 are supported. And a cross head 3 as a head portion provided with a second support member.

  A motor 4 that rotates about the vertical direction of the torque calibration device 100 is provided inside the base 1. A shaft 5 of the motor 4 has a reference torque meter that serves as a reference for calibration of the torque meter at the upper end. A drive shaft side diaphragm coupling 7 is provided as a first support member that is pivotally supported and rotatable around the shaft. Torque when the shaft 5 rotates by driving the motor 4 is transmitted to the drive shaft side diaphragm coupling 7, and the transmitted torque is transmitted to the reference torque meter. Torque is applied to the drive shaft side diaphragm coupling 7.

The support column 2 can be expanded and contracted in the longitudinal direction, and the height can be adjusted according to the size of the torque meter to be calibrated. The column 2 includes a piston portion 21 attached to the crosshead 3 and a cylinder portion 22 erected on the upper surface of the base 1.
The piston portion 21 is formed integrally with a base end portion 25 provided so as to hang down from the lower surface of the crosshead 3, and a tip end portion 26 formed integrally with the tip end of the base end portion 25 and having a diameter smaller than the base end portion 25. The distal end portion 26 is formed so as to be inserted into the cylinder portion 22.
The cylinder portion 22 is formed with an insertion hole 27 through which the distal end portion 26 is inserted along the axial direction from the upper end to the lower end. The insertion hole 27 is formed to have a diameter slightly larger than the diameter of the distal end portion 26 of the piston portion 21, and a bearing for smoothly sliding the distal end portion 26 is provided on the peripheral surface of the insertion hole 27. Is provided.

Here, when the crosshead 3 is moved upward to expose each tip portion 26 from the cylinder portion 22, a spacer 28 having the same height is fitted into each exposed tip portion 26, thereby The parallelism with respect to the base 1 can be maintained, in other words, the level can be maintained.
As shown in FIG. 2, the spacer 28 has a handle 28b attached to the outer surface of a plate material 28a that is curved in a semicircular shape. The inner surface of the semicircular plate member 28a is formed along the outer periphery of the distal end portion 26 of the piston portion 21. When the semicircular plate member 28a is attached to the distal end portion 26, the inner surface is lowered downward by its own weight due to friction with the distal end portion 26. It is designed not to slip. When attaching the spacer 28 to the tip end portion 26, the handle 28 b is held and attached so that the plate material 28 a is pressed against the outer peripheral surface of the tip end portion 26. Further, when removing the spacer 28 from the tip end portion 26, the spacer 28 is removed by holding the handle 28b and pulling it toward the handle 28b.

Also, a plurality of spacers 28 having different heights are prepared, and as shown in FIG. 1, spacers 28 having appropriate heights may be fitted according to the height at which the crosshead 3 is raised. .
Further, when the spacer 28 is fitted into the distal end portion 26, it is preferable that the outer peripheral surface of the spacer 28 and the outer peripheral surface of the base end portion 25 of the piston portion 21 be flush with each other. This is preferable because the appearance of the image can be improved.

As shown in FIG. 3, each corner portion of the base 1 is provided with a fixing mechanism that fixes the distal end portion 26 of the piston portion 21 to the base 1.
The fixing mechanism includes an insertion hole 11 into which the distal end portion 26 of the piston portion 21 can be inserted, a fixing member 13 having a slit 12 communicated with the insertion hole 11, and the slit 12. A spring 14 as an urging means for urging in the direction of expanding the width of the slit 14 is detachable from the fixing member 13 and is tightened so as to narrow the width of the slit 12 against the urging force of the spring 14 at the time of attachment. And a clamping bolt 15 as a clamping force applying means for applying force.

In the insertion hole 11 formed in the fixing member 13, when the clamping force by the clamp bolt 15 is released, the width of the slit 12 is expanded by the biasing force by the spring 14. However, if a clamping force is applied by the clamp bolt 15 so as to narrow the width of the slit 12, the insertion hole 11 becomes smaller than the cross-sectional area of the distal end portion 26.
An insertion hole for inserting the clamp bolt 15 is formed so as to be orthogonal to the slit 12.
In addition, a second slit 18 is formed from the outside of the insertion hole 11 on the slit 12 side to the outside of the slit 12 with the slit 12 interposed therebetween.

The cross head 3 is provided with a reaction shaft 8 fixed so as not to rotate with respect to the cross head 3 so as to extend downward, and is coaxial with the drive shaft side diaphragm coupling 7 at the lower end of the reaction shaft 8. A reaction shaft side diaphragm coupling 10 is provided as a second support member that is disposed on the upper side and pivotally supports the torque meter to be calibrated at the lower end.
The crosshead 3 can be moved up and down by a mechanism including gears and the like, and the lifting operation is performed by the crosshead lifting handle 19.

  Here, the torque meter attached between the drive shaft side diaphragm coupling 7 and the reaction shaft side diaphragm coupling 10 will be described. The reference torque meter is attached to one end of the attachment flange, and the torque meter to be calibrated is attached to the attachment flange. After being attached to the other end and integrating the reference torque meter, the torque meter to be calibrated, and the mounting flange, the reference torque meter is attached to the drive shaft side diaphragm coupling 7 and the torque meter to be calibrated is the reaction shaft side diaphragm coupling 10. Attached to.

  The reaction shaft 8 can be moved up and down by a mechanism including a gear and the like, and the reaction shaft 8 is moved up and down by a reaction shaft lifting handle 31. That is, when the reaction shaft 8 moves up and down, the reaction shaft side diaphragm coupling 10 also moves up and down, so that the reaction shaft lifting handle 31 moves the reaction shaft side diaphragm coupling 10 up and down.

<Effects of Embodiment>
Thus, according to the level adjustment structure of the torque calibration device 100 according to the present invention, the crosshead 3 is lifted upward when the plurality of support columns 2 are extended in the longitudinal direction. At this time, the tip portion 26 of the piston portion 21 provided in the cross head 3 moves upward in the cylinder portion 22 and is exposed above the cylinder portion 22. When the spacer 28 having the same height is fitted into each of the exposed tip portions 26 and the lifting of the cross head 3 is released, the base end portion 26 of the piston portion 21 comes into contact with the upper end of the spacer 28 and the lowering of the cross head 3 is prevented. The Thereby, since the height from the upper end of the cylinder part 22 to the crosshead 3 becomes the same in each support | pillar 2, the crosshead 3 is maintained in parallel with the base 1, ie, horizontal. Therefore, the respective struts 2 can be reliably extended by the same amount, and the calibration of the torque meter to be calibrated can be performed accurately.

  Further, by fixing the distal end portion 26 to the fixing member 13 provided on the base 1 by the fixing mechanism 10, the upper ends of the respective pillars 2 are integrally fixed by the cross head 3, and the lower ends of the respective pillars 2 are integrally formed by the base 1. Fixed to. Thereby, the rigidity of the substantially horizontal direction and the substantially vertical direction of the torque calibration apparatus 100 can be increased.

  Further, when the distal end portion 26 of the piston portion 21 is not fixed to the fixing member 13, the width of the slit 12 is expanded by the urging force of the spring 14, and the distal end portion 26 can be easily inserted into the insertion hole 11. it can. On the other hand, when the distal end portion 26 of the piston portion 21 is fixed to the fixing member 13, the distal end portion 26 is inserted into the insertion hole 11, and the width of the slit 12 is increased against the urging force of the spring 14 by the clamp bolt 15. By applying a tightening force so as to narrow, the inner wall of the insertion hole 11 tightens the distal end portion 26 of the piston portion 22. Thereby, the tip portion 26 of the piston portion 21 is fixed to the fixing member 13. Further, in order to release the distal end portion 26 of the piston portion 21 from the state of being fixed to the fixing member 13, the width of the slit 12 is expanded by the biasing force of the spring 14 by releasing the tightening force by the clamp bolt 15. The distal end portion 26 can be easily pulled out from the insertion hole 11. Therefore, the tip 26 of the piston portion 21 can be easily attached to and detached from the fixing member 13 by one operation of the clamp bolt 15.

  Further, by forming the second slit 18 outside the slit 12 and the insertion hole 11, the impact applied to the fixing member 13 from the outside can be relaxed and absorbed by the second slit 18. Cracks and the like can be prevented.

The present invention is not limited to the above embodiment. For example, although the piston part 21 and the cylinder part 22 which comprise the support | pillar 2 were made into the cylinder, they may be a triangular prism, a square pillar, and another polygonal pillar. Further, the piston part 21 may be provided on the base 1 and the cylinder part 22 may be provided on the crosshead 3.
Further, the crosshead 3 does not have to be a mechanism that moves up and down by the crosshead lifting handle 19, and may be moved up and down electrically using a motor or a speed reducer.
Further, the reaction shaft 8 does not need to be a mechanism that is moved up and down by the reaction shaft lifting handle 31 and may be moved up and down electrically using a motor or a speed reducer.
In addition, the present invention can be freely changed and improved without departing from the gist of the invention.

It is a schematic front view of a torque calibration apparatus. It is a perspective view of a spacer. It is a top view of a fixing mechanism.

Explanation of symbols

1 foundation (base)
2 Prop (pillar)
3 Crosshead (head)
7 Drive shaft side diaphragm coupling (first support member)
10 Reaction shaft side diaphragm coupling (second support member)
11 Insertion hole 12 Slit 13 Fixing member 14 Spring (biasing means)
15 Clamp bolt (Tightening force applying means)
21 Piston part 22 Cylinder part 25 Base end part 26 Tip part 28 Spacer 100 Torque calibration device

Claims (4)

A first support member that rotatably supports a reference torque meter serving as a reference for calibration of the torque meter about an axis, and a base portion that is installed so that an upper surface thereof is substantially horizontal, and is provided above the base portion; Level adjustment of a torque calibration device comprising: a head portion having a second support member that supports a torque meter to be calibrated; and a plurality of column portions that connect the base portion and the head portion and are extendable in the longitudinal direction. Structure,
Each pillar is
A piston portion having a proximal end portion provided in the head portion and a distal end portion having a diameter smaller than that of the proximal end portion;
A cylinder portion provided at the base portion and capable of inserting the tip portion;
A leveling structure for a torque calibrating device, wherein a spacer having the same height is provided at each tip exposed to the outside from the inside of the cylinder.   The level adjustment structure of the torque calibration device according to claim 1, further comprising: a fixing mechanism that is provided on the base and fixes the tip to the base. The fixing mechanism is
An insertion hole into which the distal end portion can be inserted is formed, and a fixing member having a slit communicated with the insertion hole,
A biasing means provided between the slits and biasing in a direction of widening the width of the slit;
A clamping force applying means that is detachable with respect to the fixing member, and that applies a clamping force so as to reduce the width of the slit against the biasing force of the biasing means when attached;
The level adjustment structure of the torque calibration device according to claim 2, comprising:   The level adjustment structure of the torque calibration device according to claim 3, wherein a second slit is formed outside the slit and the insertion hole.

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