JP2017072547A - Rotational balance measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotational balance measurement device capable of simplifying measurement of rotational balance and also suppressing facility costs from soaring.SOLUTION: A rotational balance measurement device 1 comprises a support 4 which supports a rotary shaft fitted to the center of rotation of a work W rotatably and a rotary driving mechanism 30 which rotates a rotary body. The rotary driving mechanism 30 drives a belt 34 abutting on an outer periphery of the work W to rotate the work W. The support 4 is provided with a chuck part 10 which pivots the rotary shaft rotatably.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rotation balance measuring apparatus.

  A rotating body such as a flywheel or a tire of an outer rotor type motor may cause abnormal noise or vibration if the rotational balance is unbalanced. For this reason, the rotating body is required to have a stable rotation balance. Therefore, a rotation balance measuring device that measures the rotation balance of a rotating body is known (for example, see Patent Document 1).

  Conventionally, as a rotation balance measuring device, there is a measuring device that measures the rotation balance of a rotating body using a spindle that supports the supporting body. This measuring apparatus includes a spindle connected to a motor via a belt, and attaches a rotating body to the spindle, and measures the rotational balance while rotating the rotating body. When measuring the rotation balance, for example, the vibration of the rotating rotating body is detected, and the detected vibration is subjected to arithmetic processing to obtain the rotation balance.

JP 2003-149070 A

  However, in the above rotation balance measuring apparatus, it is necessary to cancel the unbalance of the spindle having a large inertia when rotating the rotating body. In order to cancel the unbalance of the spindle, complicated calculation is required in the calculation process. Thus, in the above rotation balance device, there is a possibility that the measurement of the rotation balance of the rotating body may be complicated due to the influence of the support body that supports the rotating body. In addition, since a high-precision spindle is required, the equipment cost may increase.

  Therefore, the problem to be solved by the present invention is to provide a rotation balance measuring device that can simplify the measurement of the rotation balance and suppress the increase in the equipment cost.

  A rotational balance measuring device according to an embodiment of the present invention that solves the above problems is a rotational balance measuring device that measures the rotational balance of a rotating body, and rotates a rotating shaft provided at the rotational center of the rotating body. A support body that can be supported, a rotation drive mechanism that rotates the rotating body in a state where the support body is fixed, and a vibration sensor that detects vibration of the rotating body during rotation. Is characterized in that a chuck portion for rotatably supporting the rotating shaft is provided.

  By comprising in this way, it can be only a rotating shaft that rotates with a rotary body, and a support body can be made into the fixed state. For this reason, since the influence of a support body (spindle) having a large inertia can be eliminated, the measurement of the rotation balance can be simplified. In addition, since high accuracy and a spindle are not necessary, the increase in equipment cost can be suppressed.

  In the present invention, the chuck portion includes at least two fixed bearings fixed to the support, and a movable bearing attached to the support so as to be movable relative to the fixed bearing. The rotating shaft is pivotally supported by the fixed bearing and the movable bearing, and the rotating shaft can be attached to and detached from the support by moving the movable bearing. Good.

  By comprising in this way, by moving a movable bearing, a rotating shaft can be attached and a rotating shaft can be pivotally supported by a movable bearing and a fixed bearing. Therefore, the rotating shaft and the rotating body can be easily attached to and detached from the chuck portion.

  In the present invention, the rotation drive mechanism includes a belt that contacts the outer periphery of the rotating body, and a drive source that drives the belt, and the belt that contacts the outer periphery of the rotating body is You may make it rotate the said rotary body by driving in the direction which cross | intersects with respect to the axial direction of a rotating shaft.

  With this configuration, the rotational driving force supplied from the driving source can be transmitted to the rotating body by the frictional force between the rotating body and the belt. For this reason, since the influence of the driving force of the drive source with respect to the support body which supports a rotary body can be made small, the bad influence which it has on the rotation balance of a rotary body by the vibration of a support body can be made smaller.

  Further, in the present invention, the vibration sensor detects a vibration of the rotating body in a predetermined vibration direction, and the belt is applied with a pressing force along a direction intersecting the predetermined measurement direction. Further, it may be in contact with the outer periphery of the rotating body.

  With this configuration, the driving force of the belt can be transmitted to the rotating body without increasing the influence on the vibration of the rotating body detected by the vibration sensor.

  In the present invention, the fixed bearing may be disposed on the opposite side of the abutting portion between the rotating body and the belt via the rotating shaft.

  By comprising in this way, a rotating shaft is pivotally supported so that it may be pressed with respect to two fixed bearings. For this reason, since an unstable feeling due to the movable bearing being movable during the rotation of the rotating shaft and the rotating body can be suppressed, the rotating shaft and the rotating body can be rotated in a stable state.

  In the present invention, the belt may press the rotating body in the direction of the rotating shaft by tension.

  With this configuration, the rotational force of the belt can be transmitted to the rotating body, and the rotating shaft can be pressed against at least two fixed bearings.

  In the present invention, the rotating body may be a flywheel.

  With this configuration, the rotational balance of the flywheel can be measured.

  In the present invention, the vibration sensor detects vibration in a predetermined measurement direction in the rotating body, and the support body suppresses vibration in a direction that intersects the measurement direction when the rotating body rotates. A suppression structure may be provided.

  By comprising in this way, the imbalance at the time of rotation of a rotary body can be collected in the measurement direction of a rotary body. Therefore, the rotational balance of the rotating body can be measured with high accuracy.

  According to the rotation balance measuring apparatus according to the present invention, it is possible to simplify the measurement of the rotation balance and to suppress the increase in the equipment cost.

It is a perspective view of the rotation balance measuring device concerning one embodiment of the present invention. It is a perspective view of the principal part of the support body of a balance measuring apparatus. It is the perspective view which looked at the support body from the upper left back. It is the perspective view which looked at the support body from the upper right back. It is a sectional side view of a support body. It is a top view of the support body for explaining movement of the 1st lever. It is a side view of a support body for explaining movement of the 2nd lever.

  Hereinafter, a rotation balance measuring apparatus according to an embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a perspective view of a rotational balance measuring apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view of a main part of a support of the balance measuring apparatus. In the present embodiment, with the rotational balance measuring device installed on the floor, the X direction shown in FIG. 1 is referred to as the left-right direction, and the Y direction is referred to as the front-rear direction. The Z direction is referred to as the up-down direction. Moreover, the left direction and the right direction in the X direction, the front direction and the rear direction in the Y direction, and the upper direction and the lower direction in the Z direction are as shown in FIG.

  As shown in FIG. 1, the rotation balance measuring device 1 according to this embodiment includes a gantry 2. Further, a canopy 2A is provided on the top surface of the gantry 2, and a frame 3 formed of a plurality of frames is provided on the canopy 2A so as to form a substantially rectangular parallelepiped. In addition, leg portions 2B are provided at the four corners of the lower surface of the gantry 2, respectively. Further, a plate-like base member 2 </ b> C is provided on the canopy 2 </ b> A in the gantry 2. As shown in FIG. 2, a pedestal 2D is erected at a rear position of the base member 2C.

  A support 4 and a rotation drive mechanism 30 are provided inside the frame 3. In addition, a vibration detection device 40 is provided inside the frame 3 and on the side of the support 4, and a work detection device 50 is provided behind the vibration detection device 40. Further, as shown in FIG. 1, a switch device 60 is provided in front of the frame 3, and a control device 70 is provided in the rear of the frame 3.

[Support 4]
As shown in FIGS. 2 to 5, the support 4 includes a chuck portion 10. As shown in FIGS. 3 and 4, the chuck portion 10 includes a fixed block 11 and fixed bearing members 12R and 12L. The two fixed bearing members 12R and 12L are fixed to the fixed block 11. The fixed right bearing member 12R includes a fixed right bearing rod 12RA extending along the vertical direction. As shown in FIGS. 4 and 5, a fixed upper right bearing 12RB is provided at the upper part of the fixed right bearing rod 12RA, and a fixed lower right bearing member 12RC is provided at the lower part.

  Similarly, the fixed left bearing member 12L includes a fixed left bearing rod 12LA extending along the vertical direction. A fixed upper left bearing 12LB is provided at the upper part of the fixed left bearing rod 12LA, and a fixed lower left bearing 12LC is provided at the lower part. The fixed bearing rods 12RA and 12LA in the fixed bearing members 12R and 12L are exposed on the surface of the fixed block 11. Further, the fixed bearings 12RB, 12RC, 12LB, and 12LC are all rotatable at fixed positions.

  As shown in FIGS. 3 and 4, a first lever 13 is attached to the right side of the fixed block 11. The first lever 13 can swing around the first swing shaft 14 with respect to the fixed block 11. The first swing shaft 14 is disposed along the vertical direction, and the first lever 13 is swingable about the vertical axis.

  The chuck unit 10 includes a movable block 15 and a movable bearing member 16. The movable block 15 is fixed to the upper surface of the first lever 13. The movable bearing member 16 is attached to the first lever 13. As shown in FIG. 5, the movable bearing member 16 includes a movable bearing rod 16A. The movable bearing member 16 penetrates the movable block 15 in the vertical direction, and the movable bearing rod 16 </ b> A is exposed on the surface of the movable block 15.

  A movable upper bearing 16B is attached to the upper part of the movable bearing rod 16A, and a movable lower bearing 16C is attached to the lower part of the movable bearing rod 16A. The movable bearing rod 16 </ b> A and the movable bearings 16 </ b> B and 16 </ b> C in the movable bearing member 16 are movable as the first lever 13 swings.

  The movable bearings 16B and 16C in the movable bearing member 16 are rotatable at fixed positions when the first lever 13 is fixed. Above the front end of the movable block 15, a protruding portion 15B (see FIG. 7) protruding forward is formed. When the left end portion of the first lever 13 moves to the forefront, the protruding portion of the movable block 15 is disposed at a position overlapping the fixed upper bearings 12RB and 12LB of the fixed bearing members 12R and 12L in plan view.

  Further, a semicircular fixed-side notch portion 11A is formed at the rear center position of the fixed block 11, and a semicircular movable-side notch portion 15A is formed at the front center position of the movable block 15. Has been. The fixed-side notch portion 11A and the movable-side notch portion 15A are formed at positions facing each other when the first lever 13 is disposed at the foremost portion. At this time, the fixed-side notch portion 11A and the fixed-side notch portion 11A are movable. The side notch 15A is formed in a substantially circular shape. When the support 4 is viewed in plan, a part of the fixed upper bearings 12RB and 12LB of the fixed bearing members 12R and 12L is formed from a circular gap formed by the fixed cutout portion 11A and the movable cutout portion 15A. And the movable upper bearing 16B of the movable bearing member 16 becomes visible (see FIG. 6).

  Further, in the circular gap formed by the fixed-side notch portion 11A and the movable-side notch portion 15A, as shown in FIG. 5, the workpiece W provided at the center of rotation of the workpiece W to be measured is provided. A shaft member P serving as a rotation shaft is disposed. As the workpiece W to be measured, for example, a flywheel that is a rotating body having a circular shape in plan view is used. The flywheel constitutes a rotor of a so-called outer rotor type motor. The flywheel is formed in a substantially bottomed cylindrical shape, and a shaft member (rotating shaft) P is provided along the axial direction at the center of the lower surface in the radial direction. In this manner, the chuck portion 10 rotatably supports the shaft member P by the six bearings 12RB, 12RC, 12LB, 12LC, 16B, and 16C. However, the workpiece W to be measured may be another rotating body such as a rotating body having a circular or non-circular shape in plan view.

  Further, as shown in FIGS. 3 to 5, a second lever 17 is attached to the left side surface of the fixed block 11. The second lever 17 can swing around the second swing shaft 18 with respect to the fixed block 11. The second swing shaft 18 is disposed along the horizontal direction (left-right direction). For this reason, the 2nd lever 17 can be rock | fluctuated around the horizontal axis extended to right and left.

  An air cylinder 19 is provided on the lower front side of the second lever 17. A cylinder rod 20 that can be moved back and forth in the front-rear direction is attached to the air cylinder 19. The air cylinder 19 moves the cylinder rod 20 backward to push the lower part of the second lever 17 backward. When the lower part of the second lever 17 is pushed backward, the upper part of the second lever 17 is pushed forward. A bush 21 attached to the first lever 13 is provided on the front side of the second lever 17. When the upper part of the second lever 17 is pushed forward, the upper part of the second lever 17 pushes the bush 21 forward.

  By pushing the bush 21 forward, the left end of the first lever 13 is pushed to the forefront. The state of the first lever 13 and the second lever 17 at this time is referred to as a “closed state”. The state of the first lever 13 and the second lever 17 when the state is other than the closed state is referred to as “open state”. When the first lever 13 is in the closed state, the shaft member P shown in FIG. 5 contacts the fixed upper bearings 12RB, 12LB and the movable upper bearing 16B and is sandwiched between the fixed upper bearings 12RB, 12LB and the movable upper bearing 16B. It becomes a state. Similarly, when the first lever 13 is in the closed state, the shaft member P comes into contact with the fixed lower bearings 12RC, 12LC and the movable lower bearing 16C and is sandwiched between the fixed lower bearings 12RC, 12LC and the movable lower bearing 16C. .

  As shown in FIGS. 2 to 5, a disk-shaped vibration transmission plate 22 is provided at the lower portion of the support 4. The vibration transmission plate 22 transmits the vibration of the workpiece W to the vibration detection device 40 when the workpiece W rotates. Further, a plate material 23 is fixed to the right rear of the first lever 13, and the right side of the plate material 23 protrudes from the first lever 13. A compression spring 24 is provided between the right side portion of the fixed block 11 and the protruding portion of the plate member 23. The compression lever 24 biases the first lever 13 in the direction in which the right end of the first lever 13 approaches the fixed block 11 (the direction in which the left end of the first lever 13 moves away from the fixed block 11).

  Further, on the right side of the fixed block 11, a restricting member 25 that restricts the moving distance in the direction in which the first lever 13 is separated from the fixed block 11 is provided. The restriction member 25 extends from the right side of the fixed block 11 to a position behind the first lever 13 and is bent toward the rear position of the first lever 13. Since the restriction member 25 is disposed behind the first lever 13, the movement of the first lever 13 is restricted.

  As shown in FIG. 2, a vibration direction regulating member 26 is provided below the vibration transmission plate 22. The vibration direction restricting member 26 includes a restricting member main body 26A to which the vibration transmission plate 22 is fixed, and column members 26B and 26C disposed at the left and right positions of the restricting member main body 26A, respectively. The restricting member main body 26A includes a plate-like member to which the vibration transmission plate 22 is fixed, and a vertical member disposed below the plate-like member. The column members 26B and 26C are fixed to a plate member (not shown) standing on the base member 2C by a long bolt member (not shown). The plate member is fixed to the base member 2C, and the column members 26B and 26C are fixed to the plate member by long bolt members, whereby the plate member of the vibration direction regulating member 26 and the plate member are fixed. The vibration in the front-rear direction of the vibration transmission plate 22 is suppressed. Note that the vibration detection device 40 detects vibration of the workpiece W in the left-right direction. For this reason, the front-rear direction is a direction that intersects, in this case, is orthogonal to the measurement direction of the vibration of the workpiece W.

[Rotation drive mechanism 30]
As shown in FIGS. 1 and 2, the rotation drive mechanism 30 includes a stage 31 attached to the base 2 </ b> D so as to be slidable in a direction approaching and separating from the support 4. The stage 31 is provided with an encoder 32 that is rotatable about a vertical axis. A motor (not shown) is provided at a lower position in the encoder 32, and the driving force of the motor is transmitted to the encoder 32. The magnitude of the driving force transmitted to the encoder 32 is adjusted by the encoder 32.

  Further, the stage 31 is provided with three driven rollers 33A to 33C. All of the three driven rollers 33 </ b> A to 33 </ b> C are rotatable around the vertical axis in the same manner as the encoder 32. A belt 34 is wound around the encoder 32 and the three driven rollers 33A to 33C. When the motor is operated, the belt 34 is driven around the encoder 32 and the driven rollers 33A to 33C.

  The first driven roller 33A is movable in the left-right direction along a groove portion 31A formed in the stage 31 along the left-right direction. The first driven roller 33A moves along the groove portion 31A, so that the tension of the belt 34 can be adjusted, and the first driven roller functions as a tension adjusting roller.

  Further, the second driven roller 33B and the third driven roller 33C are arranged at a position where a straight line connecting the second driven roller 33B and the third driven roller 33C overlaps the work W when viewed in plan. For this reason, the belt 34 is driven in a direction intersecting the rotation axis of the workpiece W, in this case, a direction orthogonal thereto. Further, the belt 34 is in contact with the outer periphery of the work W, and the pressing force of the belt 34 between the second driven roller 33B and the third driven roller 33C directed forward, which is the direction in which the support 4 is provided, is provided. It is working. The direction in which the pressing force acts is a direction that intersects with a direction (X direction) that vibrates when the rotating body W rotates, in this case, a direction that intersects perpendicularly (Y direction). For this reason, when the belt 34 is driven, the rotational driving force supplied from the motor to the belt 34 by the frictional force between the belt 34 and the workpiece W is transmitted to the outer peripheral portion of the workpiece W to rotate the workpiece W. Therefore, the rotation drive mechanism 30 rotates the workpiece W while the support 4 is fixed.

  Further, the contact position between the workpiece W and the belt 34 is located behind the rotation axis of the workpiece W. Further, the fixed bearing members 12 </ b> R and 12 </ b> L in the chuck portion 10 are positioned in front of the rotation axis of the workpiece W. For this reason, the fixed bearing members 12R, 12L and the fixed bearing members 12RB, 12RC, 12LB, 12LC in the fixed bearing members 12R, 12L all have the rotational axis of the workpiece W with respect to the contact portion between the workpiece W and the belt 34. It is arranged on the opposite side.

[Vibration detector 40]
As shown in FIG. 2, the vibration detection device 40 includes a first vibrator 41 and a second vibrator 42. The first vibrator 41 is disposed above the second vibrator 42. The first vibrator 41 and the second vibrator 42 are fixed to the column member 26 </ b> B of the vibration direction regulating member 26 in the support 4. Thus, the first vibrator 41 and the second vibrator 42 are connected to the vibration transmission plate 22 via the vibration direction regulating member 26.

  The vibration detection device 40 includes a vibration sensor 43. A first vibrator 41 and a second vibrator 42 are connected to the vibration sensor 43, respectively, and vibrations in the left-right direction in the first vibrator 41 and the second vibrator 42 are detected. The vibration sensor 43 outputs the detected vibration to the control device 70 as a vibration signal.

[Work detection device 50]
As illustrated in FIG. 2, the workpiece detection device 50 includes a first photoelectric sensor 51 and a second photoelectric sensor 52. The first photoelectric sensor 51 and the second photoelectric sensor 52 are both reflective photoelectric sensors. The first photoelectric sensor 51 detects the position of the shaft member P by irradiating light to the shaft member P protruding from the center of the workpiece W supported by the support 4 and detecting the reflected light. The first photoelectric sensor 51 outputs the position of the shaft member P to the control device 70 as a shaft member position signal. The second photoelectric sensor 52 detects the presence or absence of the shaft member P by irradiating the work supported by the support 4 with light and detecting the reflected light. The second photoelectric sensor 52 outputs the position of the workpiece W to the control device 70 as a workpiece detection signal.

  Both the first photoelectric sensor 51 and the second photoelectric sensor 52 are supported by a support rod 53. An unillustrated photoelectric sensor support member is erected on the base member 2C, and a support rod 53 is attached to the photoelectric sensor support member. A first attachment plate 54 and a second attachment plate 55 are attached to the support rod 53. The first photoelectric sensor 51 is held on the first mounting plate 54, and the second photoelectric sensor 52 is held on the second mounting plate 55.

[Switch device 60]
As shown in FIG. 1, the switch device 60 includes a bracket 61 attached to the front of the frame body 3. A switch box 62 is placed on the bracket 61, and an operation switch 63 is provided on the top of the switch box 62. The operation switch 63 can be pressed by an operator or the like.

  When the operation switch 63 is pressed while the rotation drive mechanism 30 is stopped, the rotation drive mechanism 30 starts to operate and a motor (not shown) starts rotating. Further, when the operation switch 63 is pressed while the rotation drive mechanism 30 is operating, the rotation drive mechanism 30 stops. Further, the operation switch 63 can be rotated. When the operation switch 63 is rotated, the driving force transmitted from the motor is adjusted by the encoder 32.

[Control device 70]
As shown in FIG. 1, the control device 70 includes a control device support member 71 erected on the canopy 2 </ b> A, and a control unit 72 is attached to the control device support member 71. A liquid crystal display device 73 is attached to the surface of the control unit 72. The control unit 72 is electrically connected to the motor and encoder 32 in the rotational drive mechanism 30, the vibration sensor 43 in the vibration detection device 40, the photoelectric sensors 51 and 52 in the work detection device 50, the operation switch 63 in the switch device 60, and the like. ing.

  The control device 70 controls the motor and the encoder 32 in the rotation drive mechanism 30 based on the operation signal output from the operation switch 63 in the switch device 60. Further, the rotation balance of the workpiece W is measured based on the vibration signal output from the vibration detection device 40. Further, the position of the rotation axis P is detected based on the rotation axis position signal output from the photoelectric sensor 51 in the workpiece detection device 50, and the workpiece W is detected based on the workpiece detection signal output from the second photoelectric sensor 52. Detect the presence or absence.

  The control device 70 displays various information on the liquid crystal display device 73 while measuring the rotational balance of the workpiece W by rotating the workpiece W. The information displayed on the liquid crystal display device 73 includes a display indicating that the rotation balance measurement is being performed, the rotation speed of the workpiece W, the presence / absence of the workpiece W, the position of the rotation axis P, and the like.

  Next, a procedure for measuring the rotational balance of the workpiece W in the rotational balance measuring apparatus 1 according to the present embodiment will be described. When measuring the rotational balance of the workpiece W, the workpiece W is supported on the support 4, and then the belt 34 is brought into contact with the workpiece W, and then the workpiece W is rotated to measure the rotational balance of the workpiece W. Here, first, a procedure for supporting the workpiece W on the support 4 will be described.

  In supporting the workpiece W on the support body 4, the cylinder rod 20 in the support body 4 is in the advanced state. When the cylinder rod 20 is in the advanced state, the first lever 13 is opened by the urging force of the compression spring 24, as indicated by the phantom line in FIG. Further, as indicated by a virtual line in FIG. 7, the second lever 17 is also in an open state.

  When the first lever 13 is in the open state, the distance between the fixed upper bearings 12RB, 12LB and the movable upper bearing 16B of the shaft member P (see FIG. 5) attached to the workpiece W is the fixed upper bearing in the shaft member P. 12RB, 12LB and the diameter of the position which contacts movable upper bearing 16B are wider. Similarly, when the first lever 13 is in an open state, the distance between the fixed lower bearings 12RC, 12LC and the movable lower bearing 16C of the shaft member P is equal to the fixed lower bearings 12RC, 12LC and the movable lower bearing 16C of the shaft member P. It is wider than the diameter of the position in contact with. For this reason, since the shaft member P can be inserted between the fixed bearing members 12R and 12L and the movable bearing member 16, the shaft member P is inserted.

  When the shaft member P is inserted, the cylinder rod 20 is moved backward by the air cylinder 19. When the cylinder rod 20 is retracted, the lower part of the second lever 17 in the open state is pushed backward by the cylinder rod 20 and the upper part of the second lever 17 is pushed forward as indicated by the phantom line in FIG.

  When the upper portion of the second lever 17 is pushed forward, the left end portion of the first lever 13 is pushed forward via the bush 21. And if the left end part of the 1st lever 13 moves to the foremost part, the 1st lever 13 will be in a closed state, as shown with a continuous line in FIG. Similarly, the 2nd lever 17 will be in a closed state, as shown by the continuous line in FIG.

  Thus, when the first lever 13 is closed, the shaft member P is in contact with the fixed upper bearings 12RB and 12LB and the movable upper bearing 16B, and is in contact with the fixed lower bearings 12RC and 12LC and the movable lower bearing 16C. Supported. Further, the shaft member P is supported by six bearings, and the workpiece W is supported via the shaft member P. At this time, the air cylinder 19 maintains the state in which the cylinder rod 20 is retracted. When the cylinder rod 20 is in the retracted state, the closed state of the second lever 17 is maintained. By maintaining the closed state of the second lever 17, the closed state of the first lever 13 is maintained, and the shaft member P is reliably supported by the six bearings.

  Next, a procedure for bringing the belt 34 into contact with the workpiece W will be described. While the workpiece W is supported on the support body 4, in the rotational drive mechanism 30, the first driven roller 33A is disposed on the right side of the groove 31A, and the belt 34 is in a loosened state. When the workpiece W is supported by the support 4, the first driven roller 33 </ b> A is moved to the left to apply tension to the belt 34. Then, the first driven roller 33 </ b> A is disposed at a position where an appropriate tension is applied to the belt 34. In this way, tension is applied to the belt 34 to bring the belt 34 into contact with the outer periphery of the workpiece W.

  When the work W is supported on the support 4, the rotation balance of the work W is measured. When an operator or the like presses the operation switch 63 of the switch device 60, the stage 31 first slides in the direction close to the support 4 and the belt 34 and the workpiece W come into contact with each other. Next, the motor in the rotation drive mechanism 30 is operated, and the belt 34 is driven by the operation of the motor. At this time, since the belt 34 is in contact with the outer periphery of the workpiece W, the driving force of the belt 34 is transmitted to the workpiece W, and the workpiece W rotates.

  While the workpiece W is rotating, the first photoelectric sensor 51 and the second photoelectric sensor 52 in the workpiece detection device 50 detect the position of the shaft member P and the presence or absence of the workpiece W. Further, the vibration sensor 43 in the vibration detection device 40 detects the vibration of the workpiece W. The results of these sensors are output to the control device 70, and the control device 70 measures the rotational balance of the workpiece W.

  During measurement of the rotation balance of the workpiece W, information such as the rotation speed of the workpiece W and the position of the rotation axis P is displayed on the liquid crystal display device 73. For this reason, the worker or the like can monitor the state of measurement of the rotation balance of the workpiece W in real time. During the measurement of the rotation balance of the workpiece W, the lower portion of the second lever 17 is pressed by the air cylinder 19, whereby the first lever 13 and the second lever 17 are closed, and the second lever 17 is used to close the first lever 13. The movement of the movable block 15 is blocked by the one lever 13. For this reason, the chuck | zipper part 10 can support the workpiece | work W and the rotating shaft P in the stable state.

  After the measurement of the rotation balance of the workpiece W is completed, when the operator operates the operation switch 63, the motor of the rotation drive mechanism 30 is stopped and the driving of the belt 34 is also stopped. As the driving of the belt 34 stops, the rotation of the workpiece W also stops. After the rotation of the workpiece W stops, the cylinder rod 20 is advanced by the air cylinder 19. Then, the first lever 13 is released from being pressed by the second lever 17, and the first lever 13 is opened by the urging force of the compression spring 24. After the first lever 13 is opened, the rotary shaft P and the workpiece W are taken out.

  Thus, the rotation balance measuring apparatus according to the present embodiment includes the chuck portion 10 that rotatably supports the rotation shaft P. Moreover, since the workpiece | work W is rotated by the rotation drive mechanism 30, when rotating the workpiece | work W, the chuck | zipper part 10 does not rotate but only a bearing rotates. For this reason, since the workpiece | work W can be rotated without rotating the chuck | zipper part 10 with which mass increases, or the support body 4 containing the chuck | zipper part 10, the influence by rotating the support body 4 with a large inertia can be excluded. it can. Therefore, since it is possible to suppress the complexity of the calculation at the time of measuring the rotation balance, the measurement of the rotation balance can be simplified. Moreover, since it is not necessary to use a highly accurate spindle etc. by using the support body 4 and the rotational drive mechanism 30, the increase in equipment cost can be suppressed.

  The chuck portion 10 includes fixed bearing members 12R and 12L having two sets of fixed bearings on the upper and lower sides and a movable bearing member 16 having a pair of movable bearings on the upper and lower sides. Here, when the shaft member P is pivotally supported by the chuck portion 10, the shaft member P can be pivotally supported by moving the movable bearing member 16. Therefore, the shaft member P and the workpiece W can be easily attached to and detached from the chuck portion 10.

  Further, the rotation drive mechanism 30 rotates the workpiece W by driving the belt 34 in contact with the outer periphery of the workpiece W in a direction orthogonal to the axial direction of the shaft member P by a motor. For this reason, the rotational driving force supplied from the motor can be transmitted to the workpiece W by the frictional force between the workpiece W and the belt 34. For this reason, since the influence of the driving force of the motor with respect to the support body 4 which supports the workpiece | work W can be made small, the bad influence which it has on the rotation balance of the workpiece | work W by the vibration of the support body 4 can be made smaller.

  Furthermore, since the belt 34 is in contact with the outer periphery of the rotating body, the driving force of the belt 34 can be transmitted to the workpiece W. At this time, the pressing force from the belt 34 to the workpiece W acts along a direction orthogonal to the measurement direction of the workpiece W by the vibration sensor 43. For this reason, the influence which the pressing force which acts on the workpiece | work W from the belt 34 has on the vibration of the workpiece | work W can be suppressed. Therefore, the driving force of the belt 34 can be transmitted to the rotating body without increasing the influence on the vibration of the rotating body W detected by the vibration sensor 43.

  In addition, the fixed bearings 12RB, 12RCB, 12LB, and 12LC in the fixed bearing members 12R and 12L are all arranged on the opposite side of the contact portion between the workpiece W and the belt 34 via the rotating shaft of the workpiece W. Yes. When tension is applied to the belt 34, the tension of the belt 34 acts on the workpiece W from the outside of the workpiece W. The tension acting on the workpiece W acts on the fixed bearing members 12R and 12L via the shaft member P attached to the workpiece W. The bearing members to which the tension of the belt 34 acts via the shaft member P are not the movable bearing member 16 but the fixed bearing members 12R and 12L. For this reason, since the rotating shaft of the workpiece W is pivotally supported so as to be pressed against the two sets of fixed bearings, the bearing member is compared with the case where the tension acting from the belt 34 acts on the movable bearing member 16. Is less likely to move. Therefore, an unstable feeling due to the movable bearing being movable during the rotation of the workpiece W can be suppressed, and the shaft member P and the workpiece W can be rotated in a stable state. As a result, the measurement accuracy of the rotation balance of the workpiece W can be improved.

  In addition, the workpiece W presses the rotating body against the rotating shaft of the workpiece W by the tension of the belt 34. Therefore, the rotational force of the belt 34 can be transmitted to the workpiece W, and the rotation shaft can be pressed against the fixed bearings 12RB, 12RC, 12LB, 12LC of the two fixed bearing members 12R, 12L.

  Further, the vibration sensor 43 detects vibration in the predetermined measurement direction (left-right direction) in the workpiece W, and the support body 4 is a vibration direction regulating member that suppresses vibration in a direction orthogonal to the measurement direction when the workpiece W rotates. 26. For this reason, the vibration which generate | occur | produces in the workpiece | work W can be collected in a measurement direction (left-right direction). Therefore, the rotational balance of the workpiece W can be measured with high accuracy.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the two fixed bearing members 12R and 12L are provided as the fixed bearing members, but these may be three or four or more.

  In the above embodiment, the rotational drive mechanism 30 transmits the driving force of the motor to the workpiece W via the belt 34, but the driving force of the motor is transferred to the workpiece W via another medium such as a roller or a slider. It may be transmitted to W. Further, the belt 34 is brought into contact with the outer periphery of the workpiece W, and the driving force is transmitted from the outside of the workpiece W. However, the driving force is transmitted from the inside of the workpiece W by bringing a belt, a roller, etc. May be transmitted. Moreover, you may use other drive sources, such as an internal combustion engine, as a drive source. Furthermore, the rotational balance measuring apparatus of the present invention can also measure a workpiece other than the rotor of the outer rotor type motor.

DESCRIPTION OF SYMBOLS 1 ... Rotation balance measuring apparatus 2 ... Base 3 ... Frame body 4 ... Support body 10 ... Chuck part 11 ... Fixed block 12R ... Fixed right bearing member 12L ... Fixed left bearing member 12RA ... Fixed right bearing rod 12RB ... Fixed upper right bearing 12RC ... Fixed lower bearing 12L ... fixed left bearing 12LA ... fixed left bearing rod 12LB ... fixed upper left bearing 12LC ... fixed lower left bearing 13 ... first lever 14 ... first swing shaft 15 ... movable block 16 ... movable bearing member 16A ... movable bearing Rod 16B ... movable upper bearing 16C ... movable lower bearing 17 ... second lever 18 ... second swing shaft 19 ... air cylinder 20 cylinder rod 21 ... bush 22 ... vibration transmission plate 23 ... plate material 24 ... compression spring 25 ... regulating member 26 ... Vibration direction regulating member 26A Restricting member main bodies 26B, 26C ... pillar member 30 ... rotational drive mechanism 31 ... stage 31A ... groove 32 ... encoder 33A-33C ... driven roller 34 ... belt 40 ... vibration detector 41 ... first vibrator 42 ... second vibrator 43 ... Vibration sensor 50 ... Work detection device 51 ... First photoelectric sensor 52 ... Second photoelectric sensor 60 ... Switch device 63 ... Operation switch 70 ... Control device 72 ... Control unit 73 ... Liquid crystal display device W ... Work P ... Shaft member

Claims (8)

A rotational balance measuring device for measuring the rotational balance of a rotating body,
A support body rotatably supporting a rotation shaft provided at the rotation center of the rotation body;
A rotation drive mechanism for rotating the rotating body in a state where the support is fixed;
A vibration sensor for detecting vibration of the rotating body during rotation,
The rotation balance measuring device, wherein the support is provided with a chuck portion that rotatably supports the rotating shaft. The chuck portion includes at least two fixed bearings fixed to the support;
A movable bearing attached to the support so as to be movable relative to the fixed bearing,
The rotating shaft is pivotally supported by the fixed bearing and the movable bearing,
The rotation balance measuring apparatus according to claim 1, wherein the rotation shaft is detachable from the support by moving the movable bearing. The rotation drive mechanism includes a belt that contacts the outer periphery of the rotating body;
A drive source for driving the belt,
The rotation balance measuring apparatus according to claim 2, wherein the rotating body is rotated by driving a belt contacting the outer periphery of the rotating body in a direction intersecting an axial direction of the rotating shaft by the driving source. The vibration sensor detects vibration in a predetermined vibration direction in the rotating body,
The rotation balance measuring apparatus according to claim 3, wherein the belt is in contact with an outer periphery of the rotating body so that a pressing force acts along a direction intersecting the predetermined measurement direction.   5. The rotation balance measuring device according to claim 3, wherein the fixed bearing is disposed on an opposite side of the abutting portion between the rotating body and the belt via the rotation shaft.   The rotation balance measuring device according to any one of claims 3 to 5, wherein the belt presses the rotating body in a direction of the rotating shaft by tension.   The rotation balance measuring device according to any one of claims 1 to 6, wherein the rotating body is a flywheel. The vibration sensor detects vibration in a predetermined measurement direction in the rotating body,
The rotation balance measuring device according to any one of claims 1 to 7, wherein the support includes a vibration suppression structure that suppresses vibration in a direction intersecting the measurement direction when the rotating body rotates.