JP5325760B2 - Motor pulley centering device and centering method - Google Patents

Description

The present invention relates to a motor pulley centering device and a centering method, and more particularly, to a driven pulley to which motor power is transmitted via an endless belt wound around a driving pulley fixed to a rotating shaft of a motor. The present invention relates to a motor pulley centering device and a centering method for centering a drive pulley.

  Conventionally, motors are widely used as power sources for various industrial machines. For example, a motor is also used as a power source for moving a large number of steps connected in a staircase pattern in an escalator and a power source for moving an elevator car up and down.

  In the escalator, the power of the motor is transmitted via an endless V-belt that is wound around a driving pulley fixed to the rotating shaft of the motor and a driven pulley connected to a reduction gear that is a driven device. And input to the reduction gear. A V-belt having a trapezoidal cross section can be made wider in contact area with both side surfaces of a pulley groove forming a V-shape of each pulley than a flat belt, and is suitable for transmitting relatively large power. It is.

  However, for example, a V-belt made of a rubber material is gradually stretched and loosened while being used in a well-stretched state, and slipping occurs between the pulley and the power transmission efficiency. Further, a rubber V-belt may be cut during use due to deterioration over time. Therefore, for the V-belt used in the escalator, maintenance personnel regularly check the belt for looseness, cracks, etc., and replace them with new ones as necessary.

  FIG. 3 shows a motor 10 and a speed reducer 12 conventionally used as an escalator drive unit as viewed from above. In FIG. 3, illustration of a drive sprocket and the like connected to the speed reducer 12 is omitted.

  As shown in the drawing, the motor 10 is fixed on a rectangular base plate 14 made of, for example, a metal plate. Long holes 16 are formed through the four corners of the base plate 14, respectively. The base plate 14 is fixed on the gantry 20 by bolts 18 inserted into the long holes 16 respectively.

  The gantry 20 is formed, for example, as a metal frame, and is firmly fixed to a concrete floor surface of a machine room where the motor is installed by anchor bolts or the like. On the other hand, the speed reducer 12 is fixedly disposed on the floor surface adjacent to the gantry 20 to which the motor 10 is fixed. The gantry 20 may be fixed to other fixed structures other than the floor surface.

  A driving pulley 24 having a V-shaped pulley groove is fixed to the end of the rotating shaft 22 of the motor 10. A driven pulley 28 having a V-shaped pulley groove is also fixed to the end of the input shaft 26 of the speed reducer 12. The driven pulley 28 is in a fixed position after the speed reducer 12 is once installed.

  An endless V-belt 30 is wound around the driving pulley 24 and the driven pulley 28. The V belt 30 is tensioned with an appropriate tension, and the driving pulley 24 is accurately centered with respect to the driven pulley 28, so that the power output to the rotating shaft 22 of the motor 10 is transmitted to the V belt 30. In addition, the transmission can be satisfactorily transmitted to the speed reducer 12 via the driven pulley 28.

  Here, “centering” means a state in which the outer end face 25 of the driving pulley 24 is completely parallel to the outer end face 29 of the driven pulley 28 at a fixed position. At this time, the outer end surface 29 of the driven pulley 28 and the outer end surface 25 of the driving pulley 24 do not have to be located on the same plane due to a difference in the thickness of the pulley, and the parallel state is ensured. If so, it may be displaced in the direction of the axis 32 of the rotating shaft 22 of the motor 10. In other words, the centered state is a state in which the extending direction of the V belt 30 extending from the driving pulley 24 toward the driven pulley 28 is orthogonal to the axial center 32 of the rotating shaft 22 of the motor 10. I can say that. Note that the term “centering” in the present specification means that the above-described state is ensured or is to be secured, and the same description will not be repeated below.

  Referring to FIG. 3 again, the gantry 20 is provided with positioning means 34. The positioning means 34 is fixed to the side surface 21 of the gantry 20 that faces the speed reducer 12, and the upper plate protrudes upward from the upper surface of the gantry 20 and is adjusted by screwing into a female screw hole formed in the fixing plate 36. A bolt 38 and a retaining nut 42 screwed into the threaded portion 40 of the adjusting bolt 38 on the motor 10 side of the fixing plate 36 are included. The tip of the threaded portion 40 of the adjustment bolt 38 that is screwed through the fixing plate 36 is in contact with an edge near the corner of the base plate 14. Thereby, by tightening the adjustment bolt 38, the base plate 14 can be pressed at the tip of the screw portion 40 and moved in the direction of arrow B, that is, in the direction away from the speed reducer 12 and the driven pulley 28.

  Next, the centering operation of the drive pulley 24 when the V belt 30 is replaced will be described.

  When the V-belt 30 is replaced with a new one due to elongation, cracks, breakage, etc., the four bolts 18 that fix the base plate 14 to the mount 20 are loosened. As a result, the base plate 14 to which the motor 10 is fixed can move with respect to the gantry 20 by a distance allowed by the long hole 16. Then, the base plate 14 is moved to a position that is as close as possible to the speed reducer 12 side, and a new V-belt 30 of the driving pulley 24 and the driven pulley 28 is spanned at this position.

Thereafter, the maintenance staff pushes the motor 10 in the direction of arrow B to move the base plate 14 in the direction of arrow B , and the position where the tip of the adjustment bolt 38 abuts at a position where the V belt 30 is stretched to some extent. The bolt 18a at the corner located farthest away from the diagonal is temporarily tightened. At that time, the base plate 14 is inclined as shown by the dotted line in FIG. 3 due to the tension of the V-belt 30 acting on the drive pulley 24 of the motor 10, and in this state, the outer end face 25 of the drive pulley 24 is It is not yet parallel to the outer end face 29 of the driven pulley 28. In FIG. 3, the tilt state of the base plate 14 is depicted with a considerably exaggerated shape, but the actual tilt angle θ is, for example, several degrees.

Then, by tightening the adjusting bolt 38 and pressing the base plate 14 in the direction of the arrow B , if the base plate 14 can be rotated about the position of the bolt 18a so that the tilt angle θ is eliminated, a driving pulley 24 centering work is completed.

  As long as the applicant of the present application investigated, prior art documents related to the present invention could not be found.

  However, in the conventional centering operation as described above, when the adjustment bolt 38 is tightened, the base plate 14 only needs to rotate around the position of the bolt 18a. Is strongly pulled in the direction of arrow C, the base plate 14 is moved even at the position of the temporarily tightened bolt 18a, and the entire base plate 14 is often translated in a tilted state. For this reason, the centering operation of the drive pulley 24 at the time of belt replacement has been a laborious operation requiring a lot of time and labor.

  An object of the present invention is to provide a motor pulley centering device and a centering method capable of easily and quickly centering a drive pulley during belt replacement.

The motor pulley centering device according to the present invention is configured such that the drive pulley is driven with respect to a driven pulley at a fixed position to which motor power is transmitted through an endless belt wound around a drive pulley fixed to a rotating shaft of the motor. Motor pulley centering device for centering a motor, wherein the base is fixed to the motor installation location, the base plate is fixed on the base, and the base plate is rotated in a plane parallel to the base plate. A rotating plate that is attached to the upper surface and has the motor fixed thereto, and positioning means that adjustably positions a rotating position of the rotating plate with respect to the base plate.

  In the motor pulley centering device according to the present invention, the positioning means includes a fixing plate fixed to the gantry or the base plate and formed with a female screw hole, and a tip of a screw portion screwed into the female screw hole of the fixing plate. Includes an adjustment bolt that abuts against an edge of the rotating disk, and the adjustment bolt is wound around the drive pulley and the driven pulley by being tightened with the base plate fixed on the gantry. The rotating plate may be pressed with the tip of the threaded portion so as to rotate the rotating plate against the tension of the belt.

  In the motor pulley centering device according to the present invention, the belt may be a V-belt.

The motor pulley centering method according to the present invention includes the drive pulley with respect to a driven pulley at a fixed position to which motor power is transmitted through an endless belt wound around a drive pulley fixed to a rotating shaft of the motor. A motor pulley centering method for centering a motor, wherein a base plate on which a rotating plate with the motor fixed on an upper surface is rotatably attached is mounted on a gantry fixed at a motor installation location. The belt wound around the pulley and the driven pulley is fixed in a tensioned state, and the rotating disk is resisted against the tension of the belt by positioning means fixed to the gantry or the base plate. rotate in a plane parallel, to position the rotational position of said turntable to said drive pulley provided on a driven pulley is centered position It is intended.

  In the motor pulley centering method according to the present invention, the positioning means includes a fixing plate fixed to the gantry or the base plate and formed with a female screw hole, and a tip of a screw portion screwed into the female screw hole of the fixing plate. Includes an adjustment bolt that abuts against an edge of the rotating plate, and the adjustment plate is tightened with the base plate fixed on the gantry, whereby the rotating plate is pressed and rotated by the tip of the screw portion. You may let them.

  In the motor pulley centering method according to the present invention, the belt may be a V-belt.

  According to the motor pulley centering device and the centering method of the present invention, the belt is stretched to some extent and the base plate is fixed to the gantry, and then the rotating disk on which the motor is fixed is rotated by the positioning means. It can be positioned at a desired rotational position. Therefore, it is possible to easily and quickly center the driving pulley fixed to the rotating shaft of the motor with respect to the driven pulley.

It is a top view which shows the centering apparatus of the motor pulley which is one embodiment of this invention. It is the side view which looked at the centering apparatus of the motor pulley of FIG. 1 from the arrow A direction. It is a figure for demonstrating the centering operation | work of the conventional motor pulley.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like.

  1 and 2 show a motor pulley centering device 50 according to an embodiment of the present invention. In FIG. 1, 2, since the structure of the reduction gear 12, the input shaft 26, and the driven pulley 28 is the same as that of what is shown in FIG. 3, illustration is abbreviate | omitted. Further, in the following, the same or similar members and parts as those described above will be described using the same or similar symbols.

  The motor pulley centering device 50 according to the present embodiment includes a gantry 20 that is fixed to the installation location of the motor 10, a base plate 14 that is fixed on the gantry 20 by a plurality of bolts 18, and is rotatable with respect to the base plate 14. The rotating plate 52 is mounted and the motor 10 is fixed to the upper surface thereof, and positioning means 34 for positioning the rotating position of the rotating plate 52 relative to the base plate 14 so as to be adjustable.

  A columnar support member 54 projects from the base plate 14. On the other hand, a concave portion 58 including a columnar space is formed at the center of the lower surface of the turntable 52. A bearing member 56 is fitted in the recess 58. The upper end portion of the support member 54 is fitted and fixed in the bearing member 56. Thereby, the turntable 52 is supported so as to be rotatable with respect to the base plate 14. The turntable 52 is preferably formed of, for example, a rectangular metal plate, but the shape and material can be selected as appropriate.

  As shown in FIG. 1, the tip of the threaded portion 40 of the adjusting bolt 38 that constitutes the positioning means 34 is in contact with an edge near the corner of the V-belt 30 on the rotating plate 52. Thereby, by tightening the adjustment bolt 38, the rotating disk 52 can be pressed and rotated.

  Since the configuration other than these is the same as that already described, redundant description will be omitted.

  Next, the centering operation of the drive pulley 24 by the motor pulley centering device 50 at the time of belt replacement will be described.

  First, when the V belt 30 is extended, cracked, broken or the like and replaced with a new one, the four bolts 18 that fix the base plate 14 to the mount 20 are loosened. As a result, the base plate 14 to which the motor 10 is fixed can move with respect to the gantry 20 by a distance allowed by the long hole 16. Then, the base plate 14 is moved to a position that is as close as possible to the speed reducer 12 (upward in FIG. 1), and a new V-belt 30 of the driving pulley 24 and the driven pulley 28 is passed over at this position.

Thereafter, the maintenance staff pushes the motor 10 in the direction of arrow B to move the base plate 14 in the direction of arrow B , and tightens all the bolts 18 at a position where the V belt 30 is stretched to some extent to mount the base plate 14 on the base. Fix to 20. At that time, the rotating disk 52 is restricted in rotation by the tip of the adjusting bolt 38, and is inclined, for example, by several degrees, like the base plate 14 indicated by a dotted line in FIG. In this state, the outer end face 25 of the driving pulley 24 is not yet parallel to the outer end face 29 of the driven pulley 28.

  Then, the adjustment bolt 38 is tightened, and the rotating plate 52 is pressed in the direction of arrow C with the tip of the screw portion 40. Thereby, the turntable 52 rotates in the direction of arrow D against the tension of the V-belt 30. Then, at a position where it can be confirmed by using a dedicated measuring instrument that the outer end face 25 of the driving pulley 24 is parallel to the outer end face 29 of the driven pulley 28, the fastening nut 42 is tightened to adjust the fixing bolt 36 to the fixing plate 36. 38 position is fixed. Thereby, the rotational position of the turntable 52 is positioned at the position where the drive pulley 24 is centered, and the centering operation of the drive pulley 24 is completed.

  Thus, according to the motor pulley centering device 50 of the present embodiment, the centering operation of the drive pulley 24 at the time of replacement of the V belt 30 can be performed easily and quickly.

  The present invention is not limited to the above-described embodiment, and various changes or improvements can be made without departing from the gist or scope of the present invention.

  For example, in the above embodiment, the fixing plate 36 of the positioning means 34 is fixed to the gantry 20, but instead, the fixing plate 36 may be fixed to the base plate 14.

  In the above embodiment, the V belt 30 is used. However, the present invention may be applied to a motor pulley centering operation in which a belt other than the V belt such as a flat belt or a round belt is used.

  10 motor, 12 speed reducer, 14 base plate, 16 long hole, 18 bolt, 20 mount, 22 rotating shaft, 24 driving pulley, 25 outer end surface, 26 input shaft, 28 driven pulley, 29 outer end surface, 30 V belt, 32 Axis center, 34 Positioning means, 36 Fixing plate, 38 Adjustment bolt, 40 Screw part, 42 Retaining nut, 50 Motor pulley centering device, 52 Turntable, 54 Support member, 56 Bearing member, 58 Recessed part.

Claims (6)

A motor pulley centering device for centering the drive pulley with respect to a driven pulley at a fixed position to which motor power is transmitted via an endless belt wound around a drive pulley fixed to a rotation shaft of the motor Because
A pedestal fixed to the installation location of the motor, a base plate fixed on the pedestal, and a turntable attached to the base plate so as to be rotatable in a plane parallel to the base plate and having the motor fixed to the upper surface And a motor pulley centering device comprising: positioning means that adjustably positions a rotational position of the rotating disk with respect to the base plate. In the motor pulley centering device according to claim 1,
The positioning means includes a fixing plate fixed to the gantry or the base plate and formed with a female screw hole, and an adjustment in which a tip of a screw portion screwed into the female screw hole of the fixing plate comes into contact with an edge of the rotating plate The adjusting bolt includes a bolt, and is tightened in a state in which the base plate is fixed on the gantry, so that the belt is wound against the tension of the belt wound around the driving pulley and the driven pulley. A motor pulley centering device, wherein the rotating disk is pressed by a tip of the screw portion so as to rotate the rotating disk. In the motor pulley centering device according to claim 1 or 2,
A motor pulley centering device, wherein the belt is a V-belt. Motor pulley centering for centering the drive pulley with respect to a driven pulley at a fixed position to which motor power is transmitted via an endless belt wound around a drive pulley fixed to a rotating shaft of the motor A method,
A base plate on which a rotating plate with the motor fixed on the upper surface is rotatably attached, and a belt wound around the driving pulley and the driven pulley is stretched on a base fixed at a motor installation location. Fixed in place,
The driving pulley is centered with respect to the driven pulley by rotating the rotating disk in a plane parallel to the base plate against the tension of the belt by positioning means fixed to the gantry or the base plate. Positioning the rotating position of the rotating disk at the position,
Motor pulley centering method. The motor pulley centering method according to claim 4,
The positioning means includes a fixing plate fixed to the gantry or the base plate and formed with a female screw hole, and an adjustment in which a tip of a screw portion screwed into the female screw hole of the fixing plate comes into contact with an edge of the rotating plate A method of centering a motor pulley, comprising: a bolt, wherein the rotating plate is pressed and rotated by a tip of the threaded portion by tightening the adjusting bolt in a state where the base plate is fixed on the gantry. . In the motor pulley centering method according to claim 4 or 5,
The motor pulley centering method, wherein the belt is a V-belt.

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