JP6570968B2 - Shaft structure of the driving pulley on the cableway - Google Patents

Description

  The present invention relates to a shaft structure of a driving pulley that drives a rope in a cableway.

  A cableway is a facility that transports personnel and goods by suspending a carriage on a rope stretched between these pulleys, with pulleys that can rotate freely at at least two stops. It is widely known as a chair lift or gondola lift that transports in Japan. In this cableway facility, a prime mover comprising an electric motor or a speed reducer is provided at one of the stops, thereby driving the rope by rotating the prime mover pulley.

  When the tension on the rope is relatively low, such as when the track length is short or the number of passengers is small, the prime mover pulley is supported directly on the output shaft of the reducer and an electric motor is connected to the input shaft of the reducer. It is comprised so that it may drive. On the other hand, in a cableway where the tension of the rope is high, if the driving pulley is directly supported by the output shaft of the speed reducer, the radial load acting on the output shaft is large, so a larger speed reducer will be adopted. . For this reason, in a cableway with a high rope tension, the radial load of the driving pulley is supported using a hollow shaft, and a driving shaft is provided inside the hollow shaft, thereby rotating the driving pulley. Has been conventionally employed (see, for example, Patent Document 1).

  FIG. 6 is a vertical sectional view showing a shaft structure of a conventional driving pulley. A through-hole is drilled at the rotational center position of the driving pulley 53 in the driving frame 50 in which the devices of the driving device are disposed, and a hollow shaft 52 is inserted and fixed therein. The upper part of the hollow shaft 52 is prevented from rotating by a parallel key 59 so that the hollow shaft 52 does not rotate with respect to the through hole. Is supported rotatably. Inside the hollow shaft 52, a drive shaft 58 having spline shaft portions formed at both ends is inserted, and the upper spline shaft portion is fitted with the output portion of the speed reducer 56, and the lower spline shaft is fitted. The portion is fitted with a drive flange 57 provided on the driving pulley 53. With such a configuration, a radial load caused by the tension of the rope is received by the hollow shaft 52, and a driving force for rotating the driving pulley 53 is transmitted by the driving shaft 58.

International Publication No. 2012/088093

  As described above, in the shaft structure of the conventional driving pulley, the parallel key 59 is used so that the hollow shaft 52 does not rotate with respect to the driving frame 50. However, the prime mover frame 50 is a large structure for arranging devices such as a speed reducer 56 and an electric motor on the upper part thereof, and is processed only by a large processing machine to process the key groove of the parallel key 59. The processing cost was expensive.

  The present invention has been made in view of such circumstances, and provides a shaft structure of a driving pulley in a cableway that can be easily processed to prevent rotation of a hollow shaft, and thus processing costs can be reduced. Objective.

  The present invention provides a driving frame in which a reduction gear is fixed and a through hole is formed below the reduction gear, a hollow shaft that is fitted in the through hole of the driving frame, and an upper surface of the driving frame. A stop plate fixed to the hollow shaft, and a driving pulley rotatably supported by the hollow shaft; a driving shaft that is provided inside the hollow shaft and connects the driving pulley and the speed reducer; And a key groove is formed in each of the stopper plate and the hollow shaft, and a parallel key is inserted into each key groove to prevent the hollow shaft from rotating.

  According to the present invention, since it is not necessary to perform keyway processing on the driving frame, the processing cost required to stop the rotation of the hollow shaft can be reduced.

Side view of prime mover Plan view of prime mover Sectional view showing shaft structure of prime pulley AA arrow view in FIG. Enlarged view of part B in FIG. Vertical sectional view showing the shaft structure of a conventional driving pulley

    Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a prime mover in a cableway, and FIG. 2 is a plan view of the prime mover. The prime mover 10 is roughly divided into a prime mover frame 11, an electric motor 13, a speed reducer 15, and a prime mover pulley 16. To drive. The prime mover 10 is installed at a high place in a stop in combination with a structure such as a machine foundation or a support (not shown).

  In the prime mover 10, an electric motor 13 is fixed on the upper part of the prime mover frame 11 via an electric motor frame 12, and a speed reducer 15 is fixed near the center. The output shaft of the electric motor 13 and the input shaft of the speed reducer 15 are connected by a universal joint 14, and a braking device 17 is installed on the input shaft portion of the speed reducer 15. In addition, other devices such as a hydraulic unit 18 for operating the braking device 17 are arranged on the upper part of the driving frame 11. A driving pulley 16 is rotatably supported at a lower portion of the driving frame 11. The driving pulley 16 and the speed reducer 15 are connected in a structure described below, and the driving pulley 16 is driven by driving the electric motor 13. Rotates.

  FIG. 3 is a cross-sectional view showing the shaft structure of the driving pulley 16. In the driving frame 11, a through hole in the vertical direction is drilled at the rotational center position of the driving pulley 16, and a hollow shaft 34 is inserted and fitted therein. A locking groove is formed in a concave shape on the outer periphery of the upper portion of the hollow shaft 34, and a stop plate 35 is fitted therein to fix and support the vertical position of the hollow shaft 34. The stop plate 35 is obtained by dividing a ring-shaped steel plate into two parts. The outer peripheral portion is fixed to the driving frame 11, and the inner peripheral portion is fitted into a concave groove formed on the outer periphery of the hollow shaft 34. A sleeve 37 is rotatably supported under the hollow shaft 34 via a bearing 36. The driving pulley 16 has a structure divided into two in the horizontal direction. The sleeves 37 are sandwiched between the divided driving pulleys 16, and the driving pulley 16 is integrally attached to the sleeve 37.

A driving flange 38 having an inner spline formed on the inner surface is fixed to the lower portion of the driving pulley 16. Part is splined. On the other hand, a spline is also formed at the upper end portion of the drive shaft 39, and the spline is splined with the output portion of the speed reducer 15. As a result, the rotation of the output portion of the speed reducer 15 is transmitted to the drive flange 38 by the drive shaft 39 and the prime mover pulley 16 rotates.

  As shown in the drawing, the drive shaft 39 has a constricted portion 39a having an outer diameter slightly narrower than the bottom surface of the spline from the portion where the spline is formed inward. A shaft holding collar 40 having an inner diameter slightly larger than the constricted portion 39a of the drive shaft 39 and an outer shape larger than the outer diameter of the end of the hollow shaft 34 is fixed to the upper end of the hollow shaft 34. As a result, when the drive shaft 39 falls off due to breakage of components, etc., the spline portion is hooked on the shaft holding collar 40 to prevent the fall, and similarly when the hollow shaft 34 falls off. The shaft holding collar 40 is hooked on the driving frame 11 to prevent the fall. Similarly to the stopper plate 35, the shaft retainer collar 40 is also divided into two parts in the diameter direction.

  4 is an AA arrow view in FIG. 3, and FIG. 5 is an enlarged view of a portion B in FIG. The shaft holding collar 40 is fixed to the upper end of the hollow shaft 34 with a bolt, and the stopper plate 35 is fixed to the upper surface of the driving frame 11 with a bolt. As shown in each figure, a key groove 42 is formed at the upper end of the hollow shaft 34, and a key groove 43 is formed in the inner peripheral portion of the stopper plate 35 correspondingly. A parallel key 41 is fitted in the key groove 42 and the key groove 43, so that the hollow shaft 34 does not rotate with respect to the driving frame 11. Further, the upper surface of the parallel key 41 is covered with a shaft pressing collar 40 so that the parallel key 41 does not come out.

  As described above, in the present embodiment, the key groove 43 is formed in the stopper plate 35, and the parallel key 41 is inserted into the stopper plate 35 to prevent the hollow shaft 34 from rotating. Since it is not necessary to perform keyway processing on the frame 11, processing is easy and processing costs can be reduced. Moreover, since the structure is simple, it is easy to assemble.

DESCRIPTION OF SYMBOLS 10 Drive apparatus 11 Drive frame 12 Motor frame 13 Motor 14 Universal joint 15 Reducer 16 Drive pulley 17 Braking device 18 Hydraulic unit 19 Strip 34 Hollow shaft 35 Stop plate 36 Bearing 37 Sleeve 38 Drive flange 39 Drive shaft 39a Constriction part 40 Axis Presser collar 41 Parallel key 42 Key groove 43 Key groove 50 Driving frame 52 Hollow shaft 53 Driving pulley 54 Bearing 55 Sleeve 56 Reduction gear 57 Drive flange 58 Drive shaft 59 Parallel key

Claims (1)

  A reduction gear is fixedly installed and a driving frame having a through hole formed below the reduction gear, a hollow shaft that is inserted and attached to the through hole of the driving frame, and an upper surface of the driving frame are fixed. A stop plate for latching the hollow shaft, a driving pulley rotatably supported by the hollow shaft, and a driving shaft that is provided inside the hollow shaft and connects the driving pulley and the speed reducer, A shaft structure of a driving pulley in a cableway, wherein a key groove is formed in each of the stop plate and the hollow shaft, and a parallel key is inserted into each key groove to prevent the hollow shaft from rotating.

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