JP2020153720A - Shaft center misalignment measuring tool and balance adjuster - Google Patents

Abstract

To provide a shaft center misalignment measuring tool capable of correctly measuring shaft center misalignment, and provide a balance adjuster.SOLUTION: A shaft center misalignment measuring tool 10 includes: a base part 20 detachably fixed to an outer circumferential surface 12a of a main driving shaft 12; a strut 22 provided at the base part 20; a rod-like arm 24; an arm mounting part 26; a dial gage 30 having a probe 46 pressed by an outer circumferential surface 14a of a driven shaft 14; and a balance adjuster 34. The balance adjuster 34 has a rod-like extension arm 60, an extension arm connection part 62 for connecting one end 60a of the extension arm 60 to the other end 24b of the arm 24, a weight 64 for acting a moment to the extension arm 60, and a weight connection part 66 for connecting the weight 64 to the extension arm 60. The balance adjuster 34 is installed to the arm 24 through the extension arm connection part 62, and therefore can easily be connected to various kinds of shaft center misalignment measuring tools with the arms 24, for use.SELECTED DRAWING: Figure 1

Description

The present invention relates to a shaft misalignment measuring tool for measuring the misalignment of the shaft core between the main driving shaft and the driven shaft arranged in a straight line, and a balance adjusting tool used therein.

In a device having a rotating part such as a blower fan or a pump, a rotational force is transmitted from the rotating shaft of the motor (hereinafter referred to as "main driving shaft") to the rotating shaft of the rotating part (hereinafter referred to as "driven shaft"). Therefore, if the shaft cores are displaced from each other, the device may be damaged or abnormal noise may be generated. Therefore, conventionally, as shown in Non-Patent Document 1, the deviation of the shaft core is measured by using the shaft misalignment measuring tool, and the relative position of the rotating portion with respect to the motor is adjusted so as to eliminate the shaft misalignment. Was there.

As shown in FIG. 11, the conventional shaft misalignment measuring tool 1 includes a base portion 2, a support column 3, an arm 4, an arm mounting portion 5, and a dial gauge 6. When measuring the deviation of the shaft core between the main driving shaft 7 and the driven shaft 8 using the shaft misalignment measuring tool 1, first, the base portion 2 is fixed to the outer peripheral surface 7a of the main driving shaft 7 and the dial is used. The stylus 6a of the gauge 6 is brought into contact with the outer peripheral surface 8a of the driven shaft 8. Then, while rotating the entire shaft misalignment measuring tool 1 together with the main driving shaft 7, the scale indicated by the dial gauge 6 is recorded over the entire circumference of the driven shaft 8. After that, the "magnitude" and "direction" of the deviation of the shaft center are determined based on the recorded numerical values.

TITS Co., Ltd., "What is shaft alignment?", Homepage, [online], [Search on February 25, 2019], Internet <URL: https://www.tts-inspection.com/en / learn-maintenance / 1402maintenance_28j />

As shown in FIG. 11, in the conventional axial misalignment measuring tool 1, a dial gauge 6 is attached to the tip end portion 4a of the arm 4, and the base end portion 4b of the arm 4 is attached to the support column 3 via the arm attachment portion 5. It was attached to. Therefore, a moment acts on the arm 4 due to the weight of the arm 4 and the dial gauge 6, and the arm 4 rotates slightly around the mounting portion 5, causing an error in the measured value of the dial gauge 6. ..

That is, as shown by the solid line in FIG. 11, when the dial gauge 6 is above the driven shaft 8, the arm 4 and the dial gauge 6 rotate slightly downward, and the stylus 6a moves to the outer peripheral surface of the driven shaft 8. By being pressed against 8a, the measured value was increased. On the other hand, as shown by the alternate long and short dash line in FIG. 11, when the dial gauge 6 is below the driven shaft 8, the arm 4 and the dial gauge 6 are slightly downward as in the case where the dial gauge 6 is above the driven shaft 8. Although it rotates, the measured value is small because the force that presses the stylus 6a against the outer peripheral surface 8a of the driven shaft 8 is reduced.

The present invention has been made to deal with the above problems, and an object of the present invention is to provide a shaft misalignment measuring tool capable of accurately measuring a shaft misalignment and a balance adjusting tool used therein.

In order to achieve the above object, the features of the balance adjuster according to the present invention are a base portion detachably fixed to one outer peripheral surface of one of a linearly arranged main driving shaft and a driven shaft, and the base portion. A rod-shaped strut extending in a direction intersecting one of the main driving shaft and the driven shaft, a rod-shaped arm extending in a direction intersecting the strut, and the arm. An arm mounting portion that is angle-adjustably attached to the support column, and a dial gauge that has a stylus that is pressed against the other outer peripheral surfaces of the driving shaft and the driven shaft and is mounted on one end of the arm. A balance adjuster used for an axial misalignment measuring tool, which includes a rod-shaped extension arm, an extension arm connecting portion for connecting one end of the extension arm to the other end of the arm, and the extension arm. It is provided with a weight on which a moment is applied and a weight connecting portion for connecting the weight to the extension arm.

In this configuration, since one end of the extension arm is connected to the other end of the arm via the extension arm connecting portion, the arm and the extension arm are arranged on one side and the other side of the arm mounting portion, respectively. can do. Since the weight is connected to the extension arm via the weight connection portion, if the direction of the moment that the dial gauge acts on the arm is clockwise, the direction of the moment that the weight acts on the extension arm is counterclockwise. .. Therefore, when measuring the deviation of the shaft core, by balancing these moments, it is possible to prevent the stylus from being pressed against the driven shaft or the pressing force being reduced, and the measurement can be performed accurately.

Further, since the balance adjuster is attached to the arm via the extension arm connecting portion, it can be easily connected to various types of axis misalignment measuring tools provided with the arm.

Another feature of the balance adjuster according to the present invention is that the weight connecting portion has a first weight holding portion that holds the weight in an axially adjustable position with respect to the extension arm.

In this configuration, the axial position of the weight with respect to the extension arm can be adjusted by the first weight holding portion, so that the above two moments can be easily balanced.

Another feature of the balance adjuster according to the present invention is that the extension arm connecting portion has an extension arm angle adjusting portion that holds the extension arm at an arbitrary tilt angle with respect to the arm so that the angle can be adjusted. ..

In this configuration, the inclination angle of the extension arm with respect to the arm can be adjusted by the extension arm angle adjusting unit, so that when an obstacle exists in the vicinity of the extension arm, the obstacle can be easily avoided.

Another feature of the balance adjuster according to the present invention is that the weight connecting portion has a second weight holding portion that holds the weight so that the weight can be adjusted in the circumferential direction with respect to the extension arm.

When the position of the center of gravity of the dial gauge is deviated in a direction orthogonal to the arm in a plan view, a moment in the circumferential direction acts on the arm due to the weight of the dial gauge. In the above configuration, the position of the weight in the circumferential direction of the extension arm can be adjusted by the second weight holding portion, so that the moment in the circumferential direction in which the dial gauge acts on the arm and the circumferential direction in which the weight acts on the extension arm Can be easily balanced with the moment of. As a result, the deviation of the shaft core can be measured more accurately.

Another feature of the balance adjuster according to the present invention is that the weight connecting portion has a weight angle adjusting portion that holds the weight so that the weight can be adjusted at an arbitrary tilt angle with respect to the extension arm.

In this configuration, the inclination angle of the weight with respect to the extension arm can be adjusted by the weight angle adjusting unit, so that when an obstacle exists in the vicinity of the weight, the obstacle can be easily avoided.

Another feature of the balance adjuster according to the present invention is that the weight has a plurality of weight pieces, one of the two weight pieces adjacent to each other has a male screw portion, and the other has a male screw portion. It is to have a female threaded portion to be screwed.

In this configuration, the weight of the weight can be adjusted by increasing or decreasing the number of weight pieces, and the magnitude of the moment that the weight acts on the extension arm can be adjusted. Further, a plurality of weight pieces can be firmly joined by screw joining.

Another feature of the balance adjuster according to the present invention is that the weight has a plurality of weight pieces, and two weight pieces adjacent to each other are magnetically joined.

In this configuration, the weight of the weight can be adjusted by increasing or decreasing the number of weight pieces, and the magnitude of the moment that the weight acts on the extension arm can be adjusted. In addition, the weight piece can be easily attached and detached.

A feature of the shaft misalignment measuring tool according to the present invention is that it is provided with any of the above balance adjusting tools.

In this configuration, the effect obtained by any of the above balance adjusters can be obtained as it is.

Another feature of the shaft misalignment measuring tool according to the present invention is that the arm mounting portion includes a first holding portion, a second holding portion, a male screw member, a tubular member, a first female screw member, a second female screw member, and a third. It has a female screw member, and the first holding portion has two first holding pieces that hold one of the support and the arm, and a through hole is formed in one of the first holding pieces. The other first holding piece is formed with a through hole having a female screw, and the second holding portion has two second holding pieces that hold the other of the support and the arm. A through hole is formed in one of the second holding pieces, a through hole having a female screw is formed in the other second holding piece, and the tubular member is formed on the outer peripheral surface thereof. It is a cylindrical member on which a male screw is formed, and the male screw member is a rod-shaped member having a maximum outer diameter smaller than the inner diameter of the tubular member and having a male screw formed on the outer peripheral surface thereof. The tubular member is inserted into the through hole of one of the first holding pieces, and the male screw at one end of the tubular member is screwed into the female screw of the other first holding piece. The first female screw member is screwed into the male screw at the other end of the tubular member, one end of the male screw member is inserted into the through hole of one of the second holding pieces, and the male screw member The male screw is screwed into the female screw of the other second holding piece, and the second female screw member is screwed onto the male screw at one end of the male screw member protruding outward from the through hole of the second holding piece. Is screwed, the other end of the male screw member is inserted into the tubular member, and the third female screw member is screwed into the male screw at the other end of the male screw member protruding from the tubular member. To be.

In this configuration, the magnitude of the force with which the first holding portion holds one of the support and the arm (first holding force) can be adjusted by the first female screw member, and the force with which the second holding part holds the other of the support and the arm. The size of (second holding force) can be adjusted with the second female screw member. Further, the magnitude of the force (connecting force) for connecting the first holding portion and the second holding portion can be adjusted by the third female screw member. Therefore, when adjusting the magnitudes of the "first holding force" and the "second holding force", the "connecting force" does not decrease, and the deviation of the shaft center can be measured more accurately.

It is a front view which shows the use state of the axis misalignment measuring tool which concerns on embodiment. It is a front view which shows the structure of the shaft misalignment measuring tool which concerns on embodiment. It is a top view which shows the structure of the shaft misalignment measuring tool which concerns on embodiment. It is a rear view which shows the structure of the axis misalignment measuring tool which concerns on embodiment. It is a front view which made a part which shows the structure of a weight in the cross section. It is a front view which shows the 1st process of assembling the axis misalignment measuring tool which concerns on embodiment. It is a front view which shows the 2nd process of assembling the axis misalignment measuring tool which concerns on embodiment. (A) is a front view showing a step of adjusting the axial position of the weight with respect to the extension arm, and (B) is a front view showing a step of adjusting the inclination angle of the extension arm with respect to the arm. (A) is a front view showing a step of adjusting the circumferential position of the weight with respect to the extension arm, and (B) is a front view showing a step of adjusting the inclination angle of the weight with respect to the extension arm. (A) is a cross-sectional view showing a modified example of the arm mounting portion, and (B) is an exploded view showing a modified example of the arm mounting portion. It is a front view which shows the use state of the conventional shaft misalignment measuring tool.

Hereinafter, embodiments of the shaft misalignment measuring tool and the balance adjusting tool according to the present invention will be described with reference to the drawings. The "front, back, left, and right" directions used in the following description correspond to the directions indicated by the arrows in the figure.

FIG. 1 is a front view showing a usage state of the shaft misalignment measuring tool 10 according to the embodiment. The shaft misalignment measuring tool 10 shown in FIG. 1 measures the misalignment of the shaft core between the main driving shaft 12 and the driven shaft 14 arranged linearly in the left-right direction in the radial direction of the main driving shaft 12 and the driven shaft 14. It is an instrument to do. The main spindle 12 has a rod-shaped spindle portion 16a having a circular cross section, a diameter-expanded portion 16b provided at the tip portion of the spindle portion 16a, and a flange portion 16c provided at the tip portion of the diameter-expanded portion 16b. are doing. The driven shaft 14 has a rod-shaped spindle portion 18a having a circular cross section, a diameter-expanded portion 18b provided at the tip portion of the spindle portion 18a, and a flange portion 18c provided at the tip portion of the diameter-expanded portion 18b. are doing. Each of the main driving shaft 12 and the driven shaft 14 is formed of a magnetic material such as iron to which a magnet is attracted.

The type of the device Q1 having the main driving shaft 12 and the type of the device Q2 having the driven shaft 14 are not particularly limited, but in the present embodiment, the "motor" is used as the device Q1. A "blower" is used as the device Q2.

FIG. 2 is a front view showing the configuration of the shaft misalignment measuring tool 10. FIG. 3 is a plan view showing the configuration of the axis misalignment measuring tool 10. FIG. 4 is a rear view showing the configuration of the axis misalignment measuring tool 10. FIG. 5 is a front view showing a structure of the weight 64 with a partial cross section.

As shown in FIG. 1, the shaft misalignment measuring tool 10 has a base portion 20 detachably fixed to the outer peripheral surface 12a of the main driving shaft 12, a support column 22 provided on the base portion 20, an arm 24, and an arm attachment. A portion 26, a clip 28, a dial gauge 30, a dial gauge mounting portion 32, and a balance adjuster 34 are provided. The alternate long and short dash line in FIG. 1 shows a state in which the main driving shaft 12 is rotated 180 degrees and the dial gauge 30 is arranged below the driven shaft 14.

As shown in FIG. 2, the base portion 20 has a rectangular parallelepiped case 20a, and a magnet and a joint iron (not shown) are housed inside the case 20a. The characters "ON" and "OFF" are displayed on the front surface of the case 20a. Further, on the front surface of the case 20a, a rotation operation unit 20b coupled to a joint iron (not shown) is arranged. When the rotation operation unit 20b is aligned with the “ON” position, the position of the joint iron is determined so that the magnetic field lines of the magnet act on the external magnetic body (mainly driven shaft 12 in this embodiment). On the other hand, when the rotation operation unit 20b is aligned with the "OFF" position, the position of the joint iron is determined so that the magnetic field lines of the magnet stay inside the joint iron. Therefore, by rotating the rotation operation portion 20b, the base portion 20 can be magnetically attracted to the outer peripheral surface 12a (FIG. 1) of the main driving shaft 12 or the suction state can be released.

As shown in FIG. 2, the support column 22 is a rod-shaped member having a circular cross section made of a metal such as iron, and one end portion 22a of the support column 22 is vertically attached to the upper surface of the base portion 20. Therefore, as shown in FIG. 1, in a state where the base portion 20 is fixed to the outer peripheral surface 12a of the driving shaft 12, the support column 22 extends in a direction intersecting the driving shaft 12 (orthogonal direction in this embodiment). Be placed.

As shown in FIG. 2, the arm 24 is a rod-shaped member having a circular cross section made of a metal such as iron, and is arranged so as to extend in a direction intersecting the support column 22.

As shown in FIGS. 2 and 3, the arm mounting portion 26 is a member for mounting the arm 24 with respect to the support column 22 so that the angle can be adjusted, and is a first holding portion 36, a second holding portion 38, and a male screw member 40. And a female screw member 42.

As shown in FIG. 3, the first sandwiching portion 36 has two sandwiching pieces 36a that sandwich the support column 22, and each sandwiching piece 36a is formed with a through hole 36b. As shown in FIG. 2, the second sandwiching portion 38 has two sandwiching pieces 38a for sandwiching the arm 24, and each sandwiching piece 38a is formed with a through hole 38b (FIG. 3). Then, as shown in FIG. 3, a male screw member 40 is inserted into each of the two through holes 36b and the two through holes 38b, and the female screw member 42 is screwed into the tip of the male screw member 40. Therefore, by weakening the screwing strength of the female screw member 42 with respect to the male screw member 40, the axial and circumferential positions of the arm 24 with respect to the support column 22 can be adjusted, and the inclination angle of the arm 24 with respect to the support column 22 can be adjusted.

As shown in FIG. 2, the clip 28 prevents the arm mounting portion 26 attached to the support column 22 from moving downward, and has an annular main body portion 28a formed of a plate material having spring elasticity and an annular main body portion 28a. It has two knobs 28b provided at one end and the other end of the main body 28a in the circumferential direction.

The diameter of the main body 28a when the clip 28 is removed from the support column 22 (natural state) is set to be smaller than the diameter of the support column 22. Therefore, when the clip 28 is attached to the support column 22, the clip 28 is fixed to the support column 22 by the elastic restoring force of the main body portion 28a. When the two knob portions 28b are pinched by fingers, the diameter of the main body portion 28a is expanded while being elastically deformed. As a result, the diameter of the main body 28a can be made larger than the diameter of the support column 22, so that the clip 28 can be released from being fixed to the support column 22 and the clip 28 can be moved in the vertical direction.

As shown in FIG. 2, the dial gauge 30 has a main body portion 44 and a stylus 46 pressed against the outer peripheral surface 14a (FIG. 1) of the driven shaft 14. The main body 44 has a disk-shaped case 44a, a scale plate 44b, a pointer 44c, and a gear mechanism (not shown) that converts the linear motion of the stylus 46 into a rotary motion to rotate the pointer 44c. ing. As shown in FIG. 3, a plate-shaped mounting portion 48 having a through hole 48a is provided on the back surface of the main body portion 44.

As shown in FIG. 3, the dial gauge mounting portion 32 is a member for mounting the dial gauge 30 to one end portion 24a of the arm 24 so that the angle can be adjusted, and is a holding portion 50, a first male screw member 52, and a female screw member 54. And a second male screw member 56.

As shown in FIG. 3, the sandwiching portion 50 has two sandwiching pieces 50a for sandwiching the arm 24, and each sandwiching piece 50a is formed with a through hole 50b. A first male screw member 52 is inserted through the two through holes 50b, and a female screw member 54 is screwed into the tip of the first male screw member 52. A screw hole 52b is formed in the head portion 52a of the first male screw member 52. The second male screw member 56 is fitted into a through hole 48a of the mounting portion 48 provided in the dial gauge 30, and the tip end portion of the second male screw member 56 is screwed into the screw hole 52b of the first male screw member 52. ing.

Therefore, by weakening the screwing strength of the female screw member 54 with respect to the first male screw member 52, the axial and circumferential positions of the dial gauge 30 with respect to the arm 24 can be adjusted, and the stylus 46 with respect to the arm 24 (FIG. The tilt angle of 2) can be adjusted. Further, by adjusting the degree of screwing of the second male screw member 56 with respect to the screw hole 52b, the position of the dial gauge 30 with respect to the second male screw member 56 in the circumferential direction can be adjusted.

As shown in FIG. 2, the balance adjuster 34 includes an extension arm 60, an extension arm connecting portion 62, a weight 64, and a weight connecting portion 66. The extension arm 60 is a rod-shaped member having a circular cross section made of a metal such as iron. A flat plate-shaped mounting portion 68 is provided on one end portion 60a of the extension arm 60. As shown in FIG. 3, a through hole 68a is formed in the mounting portion 68.

As shown in FIG. 2, the extension arm connecting portion 62 is a member that connects one end 60a of the extension arm 60 to the other end 24b of the arm 24, and is integrally formed with the main body 70 and the main body 70. It has an extension arm angle adjusting unit 72.

As shown in FIG. 3, the main body 70 is a bottomed cylindrical portion having a receiving port 76a into which the other end 24b of the arm 24 is inserted. A screw hole 78 communicating with the receiving port 76a is formed in the peripheral wall portion of the main body 70, and a male screw member 80 is screwed into the screw hole 78. When the male screw member 80 is screwed into the screw hole 78 with the other end 24b of the arm 24 inserted into the receiving port 76a, the tip of the male screw member 80 is pressed against the outer peripheral surface of the arm 24 and the arm 24 is separated. Is prevented.

The extension arm angle adjusting unit 72 shown in FIG. 2 is a portion that holds the extension arm 60 with respect to the arm 24 so that the angle can be adjusted at an arbitrary inclination angle. As shown in FIG. 3, the extension arm angle adjusting portion 72 has two holding pieces 72a that sandwich the mounting portion 68 of the extension arm 60. A through hole 72b is formed in one holding piece 72a, and a screw hole 72c is formed in the other holding piece 72a. Then, with the mounting portion 68 arranged between the two holding pieces 72a, the male screw member 82 is inserted into the through hole 72b of one holding piece 72a and the through hole 68a of the mounting portion 68, and the male screw The tip of the member 82 is screwed into the screw hole 72c of the other holding piece 72a. Therefore, the inclination angle of the extension arm 60 with respect to the arm 24 can be adjusted by weakening the screwing strength of the male screw member 82 with respect to the screw hole 72c.

The weight 64 shown in FIG. 2 is a columnar member that causes a moment centered on the arm mounting portion 26 to act on the extension arm 60. As shown in FIG. 5, the weight 64 is divided into a first weight piece 64a, a second weight piece 64b, and a third weight piece 64c in the axial direction thereof. A plate-shaped mounting portion 84 having a through hole 84a is provided at an axial end portion of the first weight piece 64a constituting the end surface of the weight 64. Then, these weight pieces 64a, 64b, 64c are arranged in the axial direction and screwed to each other.

In the present embodiment, the first weight piece 64a has a female screw portion 86, the second weight piece 64b has a male screw portion 88, and the female screw portion 86 and the male screw portion 88 are screwed together. The first weight piece 64a and the second weight piece 64b are joined. Further, the second weight piece 64b has a female threaded portion 90, the third weight piece 64c has a male threaded portion 92, and the female threaded portion 90 and the male threaded portion 92 are screwed together to form a second weight piece 64c. The weight piece 64b and the third weight piece 64c are joined.

The female screw portion 86 and the female screw portion 90 are formed in the same shape, and the male screw portion 88 and the male screw portion 92 are formed in the same shape. Therefore, even when the second weight piece 64b is not used, the first weight piece 64a and the third weight piece 64c can be screw-joined and used.

Although not shown, contrary to the present embodiment, the male screw portion provided on the first weight piece 64a and the female screw portion provided on the second weight piece 64b may be screwed together. The male screw portion provided on the 2 weight piece 64b and the female screw portion provided on the 3rd weight piece 64c may be screwed together. That is, when focusing on two weight pieces adjacent to each other, one of them may have a male screw portion and the other may have a female screw portion screwed into the male screw portion.

The weight connecting portion 66 shown in FIG. 2 is a member that connects the weight 64 to the extension arm 60, and has a main body portion 94 and a weight angle adjusting portion 96 integrally formed with the main body portion 94.

As shown in FIG. 5, the main body portion 94 is a columnar portion having a through hole 94a through which the extension arm 60 is inserted. A screw hole 98 communicating with the through hole 94a is formed in the peripheral wall portion of the main body portion 94, and a male screw member 100 is screwed into the screw hole 98. When the male screw member 100 is screwed into the screw hole 98 with the extension arm 60 inserted through the through hole 94a, the tip end portion of the male screw member 100 is pressed against the outer peripheral surface of the extension arm 60. As a result, the weight connecting portion 66 with respect to the extension arm 60 is prevented from moving in the axial direction and the circumferential direction.

That is, in the present embodiment, the main body portion 94 has a function of a "first weight holding portion" that holds the weight 64 in an axially adjustable position with respect to the extension arm 60, and the weight 64 is used as the extension arm 60. On the other hand, it has the function of a "second weight holding portion" that holds the position adjustable in the circumferential direction. That is, in the present embodiment, the main body portion 94 is both a “first weight holding portion” and a “second weight holding portion”.

As shown in FIG. 5, the weight angle adjusting portion 96 is a portion that holds the weight 64 with respect to the extension arm 60 so that the angle can be adjusted at an arbitrary inclination angle, and two sandwiching portions for sandwiching the mounting portion 84 of the weight 64. It has a piece 96a. A through hole 96b is formed in one holding piece 96a, and a screw hole 96c (FIG. 4) is formed in the other holding piece 96a. As shown in FIG. 5, in a state where the mounting portion 84 is arranged between the two holding pieces 96a, the male screw member 102 is inserted into the through hole 96b of one holding piece 96a and the through hole 84a of the mounting portion 84. The tip of the male screw member 102 is screwed into the screw hole 96c (FIG. 4) of the other holding piece 96a. Therefore, the inclination angle of the weight 64 with respect to the extension arm 60 can be adjusted by weakening the screwing strength of the male screw member 102 with respect to the screw hole 96c.

FIG. 6 is a front view showing a first step of assembling the axis misalignment measuring tool 10. FIG. 7 is a front view showing a second step of assembling the axis misalignment measuring tool 10. When assembling the shaft misalignment measuring tool 10, the operator first executes the first step shown in FIG. 6 to form the integrated object X, and then executes the second step shown in FIG. 7 to perform the shaft misalignment. Complete the measuring tool 10.

In the first step shown in FIG. 6, the operator first attaches the arm mounting portion 26 and the dial gauge 30 to the arm 24. Subsequently, the extension arm 60 is attached to the arm 24 via the extension arm connecting portion 62, and the weight 64 is attached to the extension arm 60 via the weight connecting portion 66. As a result, the integral body X shown in FIG. 7 is formed. Since the specific mounting method of each component has already been described, the description here will be omitted.

In the second step shown in FIG. 7, the operator first prepares an integral body W including the base portion 20, the support column 22, and the clip 28, and adjusts the vertical position of the clip 28 with respect to the support column 22. Subsequently, the integral body X assembled in the first step is attached to the support column 22 by using the arm attachment portion 26. As a result, the shaft misalignment measuring tool 10 shown in FIG. 2 is configured. Since the method of adjusting the position of the clip 28 and the method of attaching the arm mounting portion 26 to the support column 22 have already been described, the description thereof will be omitted here.

When measuring the deviation of the shaft core between the main driving shaft 12 and the driven shaft 14 using the shaft misalignment measuring tool 10 shown in FIG. 1, first, the base portion 20 is fixed to the outer peripheral surface 12a of the main driving shaft 12. At the same time, the stylus 46 of the dial gauge 30 is brought into contact with the outer peripheral surface 14a of the driven shaft 14. Subsequently, the balance adjuster 34 is operated to balance the moment acting on the integrated object X on both the left and right sides of the arm mounting portion 26. After that, the scale indicated by the pointer 44c of the dial gauge 30 is recorded over the entire circumference of the driven shaft 14 while rotating the entire shaft misalignment measuring tool 10 together with the main driving shaft 12. After that, the "magnitude" and "direction" of the deviation of the shaft center are determined based on the recorded numerical values.

FIG. 8A is a front view showing a step of adjusting the axial position of the weight 64 with respect to the extension arm 60, and FIG. 8B shows a step of adjusting the inclination angle of the extension arm 60 with respect to the arm 24. It is a front view. FIG. 9A is a front view showing a step of adjusting the circumferential position of the weight 64 with respect to the extension arm 60, and FIG. 9B shows a step of adjusting the inclination angle of the weight 64 with respect to the extension arm 60. It is a front view.

In the above step of balancing the moment acting on the integral body X (FIG. 7) on both the left and right sides of the arm mounting portion 26, as shown in FIG. 8 (A), the axial position of the weight 64 with respect to the extension arm 60 is set. It may be adjusted, or as shown in FIG. 8B, the inclination angle of the extension arm 60 with respect to the arm 24 may be adjusted. Further, as shown in FIG. 9A, the circumferential position of the weight 64 with respect to the extension arm 60 may be adjusted. Further, as shown in FIG. 9B, the inclination angle of the weight 64 with respect to the extension arm 60 may be adjusted, or the inclination angle of the stylus 46 with respect to the arm 24 may be adjusted.

According to the present embodiment, the following effects can be achieved by the above configuration. That is, as shown in FIG. 2, since one end 60a of the extension arm 60 is connected to the other end 24b of the arm 24 via the extension arm connecting portion 62, it is connected to the left and right sides of the arm mounting portion 26. Each of the arm 24 and the extension arm 60 can be arranged. Since the weight 64 is connected to the extension arm 60 via the weight connecting portion 66, if the direction of the moment that the dial gauge 30 acts on the arm 24 is clockwise, the moment that the weight 64 acts on the extension arm 60 The direction is counterclockwise. Therefore, when measuring the deviation of the shaft core, these moments can be balanced, and it is possible to prevent the stylus 46 from being pressed against the driven shaft 14 or the pressing force being reduced, and to be accurate. Can be measured.

Further, since the balance adjuster 34 is attached to the arm 24 via the extension arm connecting portion 62, the balance adjuster 34 can be easily connected to and used with various types of axial misalignment measuring tools provided with the arm 24.

As shown in FIG. 8A, the axial position of the weight 64 with respect to the extension arm 60 can be adjusted by the main body portion 94 of the weight connecting portion 66 that functions as the “first weight holding portion”. Therefore, the moment that the dial gauge 30 shown in FIG. 1 acts on the arm 24 and the moment that the weight 64 acts on the extension arm 60 can be easily balanced on both the left and right sides of the arm mounting portion 26. As a result, the deviation of the shaft core can be measured more accurately.

As shown in FIG. 8B, the inclination angle of the extension arm 60 with respect to the arm 24 can be adjusted by the extension arm angle adjusting portion 72 of the extension arm connecting portion 62, so that when an obstacle exists in the vicinity of the extension arm 60, Can easily avoid the obstacle.

As shown in FIG. 9A, the position of the weight 64 in the circumferential direction of the extension arm 60 can be adjusted by the main body portion 94 of the weight connecting portion 66 that functions as the “second weight holding portion”. Therefore, it is possible to easily balance the circumferential moment that the dial gauge 30 acts on the arm 24 and the circumferential moment that the weight 64 acts on the extension arm 60. As a result, the deviation of the shaft core can be measured more accurately.

As shown in FIG. 9B, the inclination angle of the weight 64 with respect to the extension arm 60 can be adjusted by the weight angle adjusting portion 96 of the weight connecting portion 66. Therefore, if an obstacle exists in the vicinity of the weight 64, the inclination angle thereof can be adjusted. Obstacles can be easily avoided. Further, since the tilt angle of the stylus 46 with respect to the arm 24 can be adjusted by the dial gauge mounting portion 32, the stylus 46 with respect to the outer peripheral surface 14a (FIG. 1) of the driven shaft 14 regardless of the tilt angle of the arm 24 with respect to the support column 22. The angle can be kept constant.

As shown in FIG. 5, since the plurality of weight pieces 64a, 64b, 64c constituting the weight 64 are screw-joined to each other, the weight of the weight 64 can be adjusted and extended by increasing or decreasing the number of the weight pieces. The magnitude of the moment that the weight 64 acts on the arm 60 can be adjusted. Further, a plurality of weight pieces 64a, 64b, 64c can be firmly joined by screw joining.

The practice of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention. For example, in the above embodiment, two weight pieces adjacent to each other constituting the weight 64 are screw-bonded, but the two weight pieces adjacent to each other may be joined by the magnetic force of a magnet. With this configuration, the work of increasing or decreasing the number of weight pieces can be easily performed.

In the above embodiment, the base portion 20 is fixed to the outer peripheral surface 12a of the main driving shaft 12 and the stylus 46 is pressed against the outer peripheral surface 14a of the driven shaft 14, but on the contrary, the base portion 20 May be fixed to the outer peripheral surface 14a of the driven shaft 14, and the stylus 46 may be pressed against the outer peripheral surface 12a of the main driving shaft 12.

In the above embodiment, the "first weight holding portion" and the "second weight holding portion" are composed of the main body portion 94 of the weight connecting portion 66, but the "first weight holding portion" and the "second weight holding portion" May be composed of parts that are independent of each other.

FIG. 10 (A) is a cross-sectional view showing a modified example of the arm mounting portion, and FIG. 10 (B) is an exploded view showing a modified example of the arm mounting portion. The arm mounting portion 26 of the above embodiment shown in FIG. 3 may be changed to the arm mounting portion 110 shown in FIG. 10 (A).

As shown in FIG. 10A, the arm mounting portion 110 includes a first holding portion 112, a second holding portion 114, a male screw member 116, a tubular member 118, a first female screw member 120, a second female screw member 122, and a second female screw member. It has a 3-female screw member 124.

The first sandwiching portion 112 has two first sandwiching pieces 112a for sandwiching the support column 22, one first sandwiching piece 112a is formed with a through hole 112b, and the other first sandwiching piece 112a is formed. A through hole 112d having a female screw 112c is formed in 112a. The second sandwiching portion 114 has two second sandwiching pieces 114a for sandwiching the arm 24, one of the second sandwiching pieces 114a is formed with a through hole 114b, and the other second sandwiching piece 114a is formed. A through hole 114d having a female screw 114c is formed in 114a. The tubular member 118 is a cylindrical member having a male screw 118a formed on its outer peripheral surface. The male screw member 116 is a rod-shaped member having a male screw 116a formed on its outer peripheral surface. The maximum outer diameter of the male screw member 116 is set to be smaller than the inner diameter of the tubular member 118.

As shown in FIG. 10B, when assembling the arm mounting portion 110, first, the tubular member 118 is inserted into the through hole 112b of one of the first holding pieces 112a of the first holding portion 112, and the cylinder is formed. The male screw 118a of one end 118b of the shape member 118 is screwed into the female screw 112c of the other first holding piece 112a. Then, the first female screw member 120 is screwed into the male screw 118a of the other end 118c of the tubular member 118. Further, one end 116b of the male screw member 116 is inserted into the through hole 114b of one of the second holding pieces 114a of the second holding portion 114, and the male screw 116a of the male screw member 116 is inserted into the female screw 114c of the other second holding piece 114a. Screw in. Then, the second female screw member 122 is screwed into the male screw 116a of the one end portion 116b of the male screw member 116 protruding outward from the through hole 114b of the one second holding piece 114a.

Subsequently, as shown in FIG. 10B, the other end 116c of the male screw member 116 is inserted into the tubular member 118, and the male screw 116a of the other end 116c of the male screw member 116 protruding from the tubular member 118 is inserted. The third female screw member 124 is screwed.

According to the arm mounting portion 110 shown in FIG. 10 (A), the magnitude of the force by which the first holding portion 112 holds the support column 22 (hereinafter, referred to as “first holding force”) is adjusted by the first female screw member 120. The second female screw member 122 can adjust the magnitude of the force (hereinafter, referred to as "second holding force") that the second holding portion 114 holds the arm 24. Further, the magnitude of the force for connecting the first holding portion 112 and the second holding portion 114 (hereinafter referred to as "connecting force") can be adjusted by the third female screw member 124. Therefore, when adjusting the magnitudes of the "first holding force" and the "second holding force", the "connecting force" does not decrease, and the deviation of the shaft center can be measured more accurately.

The arm mounting portion 110 shown in FIG. 10A is configured such that the support column 22 is sandwiched by the first sandwiching portion 112 and the arm 24 is sandwiched by the second sandwiching portion 114, but the first sandwiching portion The arm 24 may be sandwiched by the 112, and the support column 22 may be sandwiched by the second sandwiching portion 114.

10 ... Shaft misalignment measuring tool, 12 ... Main driving shaft, 12a ... Outer surface, 14 ... Driven shaft, 14a ... Outer surface,
20 ... base part, 22 ... support, 24 ... arm, 26 ... arm mounting part,
30 ... Dial gauge, 32 ... Dial gauge mounting part, 34 ... Balance adjuster,
46 ... stylus, 60 ... extension arm, 62 ... extension arm connection, 64 ... weight,
66 ... Weight connection.

Claims (9)

A base part that is detachably fixed to the outer peripheral surface of one of the driven shaft and the driven shaft arranged in a straight line,
A rod-shaped strut provided on the base portion and extended in a direction intersecting with one of the main driving shaft and the driven shaft, and
A rod-shaped arm that extends in a direction that intersects the support column and
An arm mounting portion for mounting the arm with respect to the support column so that the angle can be adjusted,
A balance adjuster used for an axis misalignment measuring tool having a stylus pressed against the other outer peripheral surface of the driven shaft and the driven shaft, and a dial gauge attached to one end of the arm. hand,
With a rod-shaped extension arm
An extension arm connecting portion that connects one end of the extension arm to the other end of the arm,
A weight that causes a moment to act on the extension arm,
A balance adjuster including a weight connection portion for connecting the weight to the extension arm. The balance adjusting tool according to claim 1, wherein the weight connecting portion has a first weight holding portion that holds the weight in an axially adjustable position with respect to the extension arm. The balance adjusting tool according to claim 1 or 2, wherein the extension arm connecting portion has an extension arm angle adjusting portion that holds the extension arm so that the extension arm can be adjusted at an arbitrary inclination angle with respect to the arm. The balance adjusting tool according to any one of claims 1 to 3, wherein the weight connecting portion has a second weight holding portion that holds the weight in a circumferential direction with respect to the extension arm. The balance adjusting tool according to any one of claims 1 to 4, wherein the weight connecting portion has a weight angle adjusting portion that holds the weight so that the weight can be adjusted at an arbitrary inclination angle with respect to the extension arm. The weight has a plurality of weight pieces and has a plurality of weight pieces.
The balance adjustment according to any one of claims 1 to 5, wherein one of the two weight pieces adjacent to each other has a male screw portion and the other has a female screw portion screwed into the male screw portion. Ingredients. The weight has a plurality of weight pieces and has a plurality of weight pieces.
The balance adjuster according to any one of claims 1 to 5, wherein the two weight pieces adjacent to each other are magnetically joined. A shaft misalignment measuring tool comprising the balance adjusting tool according to any one of claims 1 to 7. The arm mounting portion has a first holding portion, a second holding portion, a male screw member, a tubular member, a first female screw member, a second female screw member, and a third female screw member.
The first holding portion has two first holding pieces that hold one of the support and the arm, and one first holding piece is formed with a through hole, and the other first holding piece is formed. A through hole having a female screw is formed in the holding piece.
The second holding portion has two second holding pieces that hold the support and the other of the arm, and one second holding piece is formed with a through hole, and the other second holding piece is formed. A through hole having a female screw is formed in the holding piece.
The tubular member is a cylindrical member having a male screw formed on its outer peripheral surface.
The male screw member is a rod-shaped member having a maximum outer diameter smaller than the inner diameter of the tubular member and having a male screw formed on the outer peripheral surface thereof.
The tubular member is inserted into the through hole of the first holding piece, and the male screw at one end of the tubular member is screwed into the female screw of the other first holding piece. The first female screw member is screwed onto the male screw at the other end of the tubular member.
One end of the male screw member is inserted into the through hole of one of the second holding pieces, and the male screw of the male screw member is screwed into the female screw of the other second holding piece.
The second female screw member is screwed into the male screw at one end of the male screw member protruding outward from the through hole of the second holding piece.
8. The third female screw member is screwed into the male screw at the other end of the male screw member protruding from the tubular member while the other end of the male screw member is inserted into the tubular member. Axial misalignment measuring tool described in.