JP2007015810A - Hoisting machine for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hoisting machine for an elevator capable of reducing reaction force, miniaturizing an encoder, and reducing the size of a fixed shaft by supporting one end of a shaft supporting base by a spring. <P>SOLUTION: This hoisting machine for the elevator is provided with a shaft supporting skeleton 3, the shaft supporting base, the fixed shaft 5 whose both end parts are supported on the shaft supporting skeleton and the shaft supporting base, a rotor 9 attached rotatably to the fixed shaft and including a traction sheave 8, and the encoder 11 provided between an inner side of the shaft supporting base and the rotor and at the outer periphery of the fixed shaft. The shaft supporting base has a vertically divided structure constituted by an upper part shaft supporting base 4a for supporting one end part of the fixed shaft and a lower part shaft supporting base 4b for loading and supporting the upper part shaft supporting base. A mounting device for mounting the upper part shaft supporting base on the lower part shaft supporting base so as to advance in parallel in the vertical direction is provided between the upper part shaft supporting base and the lower part shaft supporting base. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elevator hoisting machine having a both-end support structure having a fixed shaft supported at both ends.

  In a conventional elevator hoisting machine, a cantilever elevator hoisting machine having a fixed shaft supported at one end (for example, see Patent Document 1), or a both-end support structure having a fixed shaft supported at both ends. Elevator hoisting machines (see, for example, Patent Document 2).

JP 2004-229498 A JP 2000-289954 A

  In the elevator hoist with a cantilever structure described in Patent Document 1, if the suspension load increases, the shaft may be thickened. However, in the hoist intended to save space, devices such as a brake are incorporated. In addition, there is a limit to thickening the shaft, and a cantilever structure is impossible. Moreover, in the elevator hoisting machine having the both-end support structure described in Patent Document 2, the main shaft is supported at both ends so that it can be easily installed in a narrow space, and a hollow encoder is inserted into the main shaft at the shaft end. Is designed to be thin. However, in this structure, the support reaction force is uniquely determined by the positional relationship between the load point and the support point, and the shaft diameter is also determined from the strength condition. In this case, the shaft diameter becomes very large, so in the structure where a hollow encoder bracket is placed outside the shaft and the encoder is fitted to the bracket, the inner diameter of the encoder becomes very large, which increases the cost. There was a problem of becoming. Also, if you want to reduce the diameter of one end of the shaft, it is better to keep the support point on the side where you want to reduce the diameter from the load point, but the axial dimension of the hoisting machine becomes unnecessarily long, which saves space and costs. There was a problem from the aspect.

  The present invention was made to solve the above-described problems, and in a hoisting machine having a both-end support structure having a fixed shaft supported at both ends, by supporting one end of the shaft support base with a spring, An elevator hoisting machine in which the reaction force is reduced to reduce the size of the encoder and the diameter of the fixed shaft is provided.

  In the elevator hoist according to the present invention, a shaft support housing, a shaft support base provided opposite to the shaft support housing, a fixed shaft having both ends supported by the shaft support housing and the shaft support base, and The rotor including a traction sheave, which is rotatably attached to the fixed shaft via a bearing, the stator winding provided on the shaft support housing, and the rotor arranged to face the stator winding. A field magnet constituting an electric motor by a wire, a brake device provided on a shaft support housing and arranged to face a braking surface formed on the rotor, a shaft between a shaft support base and the rotor, and a fixed shaft The shaft support base has an upper and lower split structure comprising an upper shaft support base that supports one end of the fixed shaft and a lower shaft support base that supports and supports the upper shaft support base. Upper shaft support base and lower shaft support base Between, it is provided with a translatable attaching the mounting device in the vertical direction upper shaft support table with respect to the lower shaft support base.

  According to this invention, since the shaft end is supported in advance by a predetermined spring force by adopting the support structure in which the spring is inserted on one side of the fixed shaft supported at both ends, the support reaction force is the spring. Compared with the case where both ends are fixed without a spring, the support reaction force at the shaft end is reduced and the bending moment near the shaft end is reduced. Therefore, the shaft diameter can be reduced. Therefore, if the spring force is arbitrarily set, the shared load of the shaft support can be arbitrarily set. If the shared load of the shaft support is reduced, the shaft diameter in the vicinity of the shaft support can be reduced. As a result, the encoder can be reduced in size and the cost can be reduced.

Embodiment 1 FIG.
1 is a longitudinal sectional view showing the overall configuration of an elevator hoisting machine according to Embodiment 1 of the present invention, and FIG. 2 is a side view of the elevator hoisting machine according to Embodiment 1 of the present invention viewed from the side opposite to the motor. It is.

FIG. 1 is an overall configuration diagram of an elevator hoisting machine according to the present invention. At both ends on a base 1, a saddle-like shape having a bottomed cylindrical shape and having a stator winding 2 of an electric motor attached to an inner peripheral part. The shaft support housing 3 and the shaft support 4 provided opposite to the shaft support housing 3 are fixed. Both ends of the fixed shaft 5 are supported by the shaft support housing 3 and the shaft support 4. A rotor 9 including a field magnet 7 and a traction sheave 8 of an electric motor is rotatably attached to the fixed shaft 5 through bearings 6a and 6b. A stepped hollow cylindrical encoder bracket 10 is fixed to the rotor 9. An inner ring of the encoder 11 is fitted to the outer periphery of the fixed shaft 5 and the outer periphery of the encoder bracket 10. The encoder 11 is attached to the shaft support 4 via a U-shaped leaf spring 12 interposed between the outer end thereof and the inside of the shaft support 4. The shaft support 4 includes an upper shaft support 4a that penetrates and supports one end of the fixed shaft 5, and a lower shaft support 4b that stands on the base 1 and supports the upper shaft support 4a. It is divided into upper and lower parts. As shown in FIG. 2, vertical through holes 13 are provided at both ends of the upper shaft support 4a, and screw holes are provided at positions corresponding to the through holes 13 at both ends of the lower shaft support 4b. 14, a shaft type guide 15 is inserted from above each through hole 13 of the upper shaft support base 4a, and a coil spring 16 is interposed between the upper shaft support base 4a and the lower shaft support base 4b. By screwing the lower end of the guide 15 of the mold into each screw hole 14 of the lower shaft support base 4b, the upper shaft support base 4a is attached by the guide 15 so as to be able to translate in the vertical direction and at the same time elastically supported by the coil spring 16. is doing. Further, the shaft-type guide 15 has a stopper 17 for restricting the upward movement of the upper shaft support 4a at the head thereof.
A brake device 18 is disposed opposite to the braking surface provided on the inner peripheral surface of the rotor 9.

  According to the first embodiment of the present invention configured as described above, the shaft end is previously set with a predetermined spring force by adopting a support structure in which a spring is inserted on one side of the fixed shaft supported at both ends. Since it is supported, the support reaction force is only the spring force, and the support reaction force at the shaft end is smaller and the bending moment near the shaft end is smaller than in the case of fixing both ends without a spring. Therefore, the shaft diameter can be reduced. Therefore, if the spring force is arbitrarily set, the shared load of the shaft support can be arbitrarily set. If the shared load of the shaft support is reduced, the shaft diameter in the vicinity of the shaft support can be reduced. As a result, the encoder can be reduced in size and the cost can be reduced.

Embodiment 2. FIG.
FIG. 3 is a side view of the elevator hoist according to Embodiment 2 of the present invention as viewed from the side opposite to the motor. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the second embodiment, the difference from the first embodiment is that, first of all, a direct shaft type guide 15 is provided without interposing a coil spring 16 between the upper shaft support 4a and the lower shaft support 4b. Is that the lower end portion of each is screwed into each screw hole 14 of the lower shaft support 4b. Secondly, as shown in FIG. 3, spring force adjusting bolts 19 are respectively screwed inside the through holes 13 on both sides of the upper shaft support base 4 a. A coil spring 16 located between the upper shaft support 4a and the lower shaft support 4b is provided in the lower part. The upper end portion of the coil spring 16 is inserted into the lower end portion of the through hole 20 through which the lower end portion of each spring force adjusting bolt 19 of the upper shaft support 4 a passes, and between the lower end portion of each spring force adjusting bolt 19 and the coil spring 16. It is pressed indirectly by the operating body 21 interposed therebetween.

  Therefore, according to the second embodiment, when the spring force adjusting bolt 19 is loosened, the coil spring 16 can be made free length, so that the reaction force on the shaft support 4 side can be adjusted to zero. . If the shaft-type guide 15 is removed by setting the spring force to 0, the upper shaft support 4a can be easily removed, so that the encoder 11 can be easily replaced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view which shows the whole structure of the elevator hoisting machine in Embodiment 1 of this invention. It is the side view which looked at the winding machine for elevators in Embodiment 1 of this invention from the non-motor side. It is the side view which looked at the winding machine for elevators in Embodiment 2 of this invention from the non-motor side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Stator winding 3 Shaft support frame 4 Shaft support stand 4a Upper shaft support stand 4b Lower shaft support stand 5 Fixed shaft 6a, 6b Bearing 7 Field magnet 8 Traction sheave 9 Rotor 10 Encoder bracket 11 Encoder 12 Leaf spring 13 Through hole 14 Screw hole 15 Guide 16 Coil spring 17 Stopper 18 Brake device 19 Spring force adjusting bolt 20 Through hole 21 Operating body

Claims (4)

A shaft support housing;
A shaft support base provided opposite to the shaft support housing;
A fixed shaft having both ends supported by the shaft support housing and the shaft support;
A rotor that is rotatably attached to the fixed shaft via a bearing and includes a traction sheave;
A stator winding provided in the shaft support housing;
A field magnet that is disposed on the rotor to face the stator winding, and constitutes an electric motor with the stator winding;
A brake device provided on the shaft support housing and disposed opposite to a braking surface formed on the rotor;
An encoder provided between the inner side of the shaft support and the rotor and provided on the outer periphery of the fixed shaft;
The shaft support base has a vertically divided structure comprising an upper shaft support base that supports one end of the fixed shaft and a lower shaft support base that supports and supports the upper shaft support base,
An elevator winding characterized in that an attachment device is provided between the upper shaft support and the lower shaft support so as to attach the upper shaft support to the lower shaft support so as to translate in the vertical direction. Upper machine.   A mounting device for attaching the upper shaft support base to the lower shaft support base so as to be able to translate in the vertical direction includes a spring provided between the upper shaft support base and the lower shaft support base, and a guide with a stopper. The elevator hoist according to claim 1.   The mounting device for attaching the upper shaft support base to the lower shaft support base so as to be able to translate in the vertical direction includes a spring provided between the upper shaft support base and the lower shaft support base, a guide with a stopper, and a spring. The elevator hoisting machine according to claim 1, further comprising a force adjusting bolt.   4. The elevator hoist according to claim 2, wherein the mounting device is provided at both ends of the upper shaft support and the lower shaft support.

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