JP2015023624A - Hoist for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the thickness of a thin hoist that uses a concentrated wind motor of outer rotor type.SOLUTION: A hoist for elevator comprises: a housing; a main shaft; a bearing housing; a sheave integrated with the bearing housing; a cylindrical brake drum rotated integrally with the sheave and larger in diameter than the sheave; a brake device for braking the outer peripheral surface of the brake drum fixed to the housing; a motor rotor of a permanent magnetic type motor, configured on the inner peripheral surface of the brake drum; a motor stator arranged radially opposite to and inside the rotor of the permanent magnet type motor and fixed to the housing; and a plurality of stator coils fixed to the motor stator. The inside of the housing has the shape of a bottomed recess larger in outside diameter than the motor rotor and brake drum. The outer peripheral part of the housing is formed so as to cover the outer peripheral surfaces of the motor rotor and brake drum. The bridge line of the stator coil is fixed in the side direction of the brake drum and motor rotor, and on the bottom outer peripheral side of the bottomed recess shape of the housing.

Description

  The present invention relates to an elevator hoisting machine, and is preferably applied to an elevator hoisting machine that drives a machine room-less elevator.

  Generally, hoisting machines and motor control devices for raising and lowering the elevator car up and down, and governors used for emergency braking when the car is overspeeded are machines installed at the top of the building. It is installed in the room. However, so-called machine room-less elevators, which do not have a machine room, are also widely used in elevators in which the elevator car has a relatively slow lifting speed.

  In the case of a machine room-less elevator, the hoisting machine is also installed in the hoistway in the same manner as all devices conventionally installed in the machine room are installed in the hoistway. There are various forms of installing the hoisting machine in the hoistway, for example, the hoisting machine is installed so that the cross section of the car overlaps with a part or all of the hoisting machine at the lowermost or uppermost part of the hoistway, Alternatively, there is an intermediate part in the height direction of the hoistway, where a hoisting machine is installed in the gap between the car and the hoistway wall. Usually, the clearance between the carriage and the hoistway wall is about several hundred mm. For this reason, in order to install the hoisting machine in the gap, a flat hoisting machine is required, and a so-called thin hoisting machine is used.

  FIG. 1 is a schematic diagram of a cross section of a hoistway of a machine room-less elevator using a thin hoist, and FIG. 2 is a schematic diagram of a side surface of the hoistway. As shown in the drawing, the thin hoist 1 is generally installed in a gap of about several hundred mm between the hoistway wall 2 and the car 3 so as to face the hoistway wall 2. . Further, in many cases, a counterweight 4 and a guide rail 5 for counterweight are arranged on the side of the thin hoist 1. That is, the thin hoisting machine 1 is installed in a form surrounded by a hoistway wall 2, a car 3, and a counterweight 4. Therefore, if the thin hoist 1 can be reduced in size, the cross section of the hoistway can be reduced, and the degree of freedom of the layout of the equipment installed in the hoistway can be increased. For this reason, downsizing of a thin hoist used for a machine room-less elevator, in particular, a reduction in thickness is an important technical issue.

  In the thin hoisting machine, in order to make the motor part thinner, an outer rotor type in which the position of the gap can be moved to the outside is used, or concentrated winding that can make the coil end of the stator winding small is used. However, since the connecting wire that connects multiple stator windings is generally installed on the side of the coil end, the thickness of the winding machine increases by the thickness of the connecting wire and the member that fixes the connecting wire. There was a problem of doing it.

  In order to solve this problem, in Patent Document 1, in an outer rotor type concentrated winding motor, an abutting plate for reinforcing a stator is extended in the inner diameter direction, and a crossover is installed at an extended portion of the abutting plate. The thickness of the hoisting machine due to the thickness of the crossover wire and the member fixing the crossover wire is avoided.

  Further, in Patent Document 2, in an inner rotor type concentrated winding motor, a high density winding is realized by installing a crossover wire and a member for fixing the crossover wire at the inner diameter side of the stator and at the end of the insulator. This makes it possible to reduce the size of the motor. However, the high-density winding in Patent Document 2 does not avoid the influence of the connecting wire and the thickness of the member that fixes the connecting wire.

JP 2011-217425 A JP2012-110212A

  By the way, the thin hoisting machine requires a lead wire for connecting the control device and the motor winding regardless of the type of the motor. If the lead wire is installed in a form that protrudes from the outer shape of the hoist, the lead wire comes in contact with the hoistway wall, the guide rail, the car, etc., so the hoistway must be enlarged. That is, in order to make the thin hoisting machine suitable for the machine room-less elevator, it is necessary to make the lead wire not protrude from the outer shape of the hoisting machine. However, as shown in FIGS. 1 and 2, the upper and lower portions of the hoisting machine are dead spaces, and when the lead wire protrudes from this part, the size of the hoistway is not affected.

  Japanese Patent Application Laid-Open No. H10-228707 discloses a crossover wire installed on the inner diameter side of a stator in an outer rotor type concentrated winding motor. For this reason, the lead wire connected to the crossover wire needs to come out from the side near the inner diameter of the casing of the hoisting machine. That is, in order to exert the thinning effect obtained by installing the crossover wire on the inner diameter side of the stator, a hole penetrating the casing is provided near the inner diameter of the side surface of the casing on the anti sheave side, I had to make a lead line from there.

  In order to install the lead wire near the inner diameter of the housing and not lead the lead wire from the side, for example, wire the lead wire inside the hoisting machine and make holes in the upper or lower end of the housing. It is possible to use a method of providing a lead line from there. However, in order to secure the installation space for the lead wire, there is a problem that the thickness of the hoist increases by the amount of the lead wire and the member that fixes the lead wire.

  In addition, to provide a hole that penetrates the housing at a position near the inner diameter on the side of the housing on the side of the anti-shelter side, so that the lead wire drawn out to the outside of the hoisting machine does not jump out of the hoisting machine outer shape Requires a means such as providing the above-described through hole and a notch extending to the upper end or lower end of the casing on the side surface outside the casing on the side of the anti-shelves, and embedding a lead wire there. However, since the notch area is wide, the strength and rigidity of the housing is reduced, and in order to compensate for this, there is a problem that the thickness of the side surface of the housing increases and the thickness of the hoisting machine increases.

  The present invention has been made in consideration of the above points, and proposes an elevator hoisting machine capable of making the hoisting machine thinner in a thin hoisting machine using an outer rotor type concentrated winding motor. It is something to try.

  In order to solve such a problem, in the present invention, an elevator hoisting machine in which a stator winding is a concentrated winding, and a casing that supports the suspension load of the elevator, and one end of the casing is fixed in a cantilever manner. A supported main shaft, a bearing housing rotatably attached via a bearing fixed to the other end of the main shaft, a sheave united with the bearing housing, and a single unit rotating with the sheave unit, A brake drum having a diameter larger than that of the sheave and a cylindrical brake drum, a brake device for braking the outer peripheral surface of the brake drum fixed to the housing, and a permanent magnet configured on the inner peripheral surface of the brake drum A motor rotor of the motor, a motor stator fixed to the housing in a radial direction inside the rotor of the permanent magnet motor, and a plurality of motor stators fixed to the motor stator With the stator winding The inside of the housing has a bottomed concave shape larger than the outer diameters of the motor rotor and the brake drum, and the outer periphery of the housing covers the outer surfaces of the motor rotor and the brake drum. The connecting wire of the stator winding is fixed to the lateral direction of the brake drum and the motor rotor and to the outer peripheral side of the bottom of the bottomed concave shape of the housing. An elevator hoisting machine is provided.

  According to such a configuration, it is possible to install the stator winding jumper wire near the upper end or the lower end of the housing while securing a sufficient space for installing the stator winding jumper wire in the housing. The hole for leading the lead wire connected to the crossover wire to the outside of the housing can be made small. Thereby, the elevator hoisting machine can be thinned without reducing the strength and rigidity of the housing.

  According to the present invention, in a thin hoisting machine using an outer rotor type concentrated winding motor, the hoisting machine can be made thinner.

It is a schematic diagram of the hoistway cross section of a general machine room less elevator. It is a schematic diagram of the hoistway side surface of a general machine room-less elevator. 1 is an external view of an elevator thin hoist according to an embodiment of the present invention. It is side surface sectional drawing of the thin hoisting machine for elevators concerning the embodiment. It is an enlarged view of side sectional drawing of the thin type hoisting machine for elevators concerning the embodiment. It is an enlarged view of the coil | winding concerning the embodiment. It is a cross-sectional enlarged view of the site | part which binds the crossover wire concerning the embodiment, and a crossover fixing member.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Configuration of Elevator Hoisting Machine First, the configuration of an elevator hoisting machine (thin hoisting machine) 1 according to the present embodiment will be described with reference to FIGS. FIG. 3 is an external view of the elevator hoist 1. FIG. 4 is a side sectional view of the elevator hoisting machine 1, and FIG. 5 is an enlarged view of a side section of the elevator hoisting machine 1.

  As shown in FIGS. 3 to 5, the elevator hoist 1 mainly includes a sheave 10, a casing 11, a brake drum 12, a main shaft 13, a bearing 14, a bearing cover 15, a bearing housing 16, a permanent magnet 17, The stator iron core 18, the stator winding 19, the crossover wire 30, and the brake device 21 are included.

  The casing 11 is made of cast iron into an approximate shape and then machined, and the center portion has a hollow cylindrical shape. One end of the main shaft 13 is cantilever-supported by interference fit fitting to the hollow cylindrical portion, and a bearing 14 is fixed to the other end of the main shaft 13.

  A bearing housing 16 is fixed to the outer periphery of the bearing 14. The bearing housing 16 is integrally formed with cast iron together with a sheave 10 having a larger diameter than the bearing housing 16 and a brake drum 12 having a larger diameter than the sheave 10. The cross-sectional shape of the brake drum 12 is L-shaped, and has a bottomed cylindrical shape that is convex toward the sheave 10 side. A bearing cover 15 for protecting the bearing is fixed to an end surface of the bearing housing 16.

  Brake devices 21 are fixed to the upper and lower end surfaces of the housing 11. In this way, the brake device 21 is fixed to the upper and lower portions of the hoisting machine, as shown in FIGS. 1 and 2, the upper and lower sides of the hoisting machine are dead spaces, and the brake device 21 is fixed here. This is because the hoistway dimensions are not affected.

  As shown in FIG. 5, the brake device 21 mainly includes an electromagnet 22, a brake pad 23, and a rod 24 that connects the electromagnet 22 and the brake pad 23. Through holes are provided in the upper and lower end surfaces of the housing 11, the brake pad 23 and the rod 24 are disposed inside the holes, and the brake pad 23 is pressed against the outer peripheral surface of the brake drum 12, thereby rotating integrally with the brake drum 12. The sheave 10 is braked.

  A plurality of permanent magnets 17 are alternately attached to the inner peripheral surface of the brake drum 12 in the circumferential direction, and a rotor of a surface magnet type motor is configured together with the brake drum 12. That is, the outer peripheral portion of the brake drum 12 serves both as a brake braking material and a rotor core (magnetic core). The brake drum 12 is formed of cast iron. Since the cast iron is a magnetic material, it can be a core.

  The casing 11 has two bottomed cylindrical portions that are the same as the main shaft 13 at the center, and a stator core 18 made of an annular laminated electromagnetic steel sheet is fitted into the outer periphery of the smaller cylindrical portion. It is fixed by a method such as a bolt. The stator core 18 includes a stator winding 19, and the stator core 18 and the stator winding 19 constitute a motor stator. The stator winding 19 is a concentrated winding that can reduce the coil end in order to reduce the thickness of the hoist.

  The rotor and the stator described above are arranged so as to face each other in the radial direction with the air gap interposed therebetween, and the rotor is located on the outer peripheral side of the stator, and constitutes a so-called outer rotor type motor. Since the outer rotor type motor can make the position of the gap closer to the outer diameter than the inner rotor type, it is advantageous for thinning the hoisting machine.

  The rotational torque generated by this motor is transmitted to the sheave 10 via the brake drum 12 and drives a plurality of ropes 7 wound around the sheave 10. The rope 7 hangs the elevator car 3 and the counterweight 4 in a slab-like manner, and driving the rope 7 moves the car 3 up and down.

  Of the two bottomed cylindrical portions formed in the housing 11, the connecting wire 30 of the stator winding 19 and the outer bottom of the larger bottom surface and the side of the brake drum 12 and the permanent magnet 17. A crossover fixing member 31 is installed.

  In order to secure a space for installing the crossover wire 30 and the crossover fixing member 31, the end surface of the outer periphery of the brake drum 12 on the side opposite to the sheave and the end surface of the permanent magnet 17 are on the side opposite to the sheave of the stator core 18. The same surface as the end face. The end surface of the permanent magnet 17 on the sheave side is also flush with the other end surface of the stator core 18. That is, the thickness of the stator core 18 and the axial length of the permanent magnet 17 are the same.

  As a result, the connecting wire 30 and the fixing member 31 of the connecting wire are installed at the position where the coil end height of the stator winding 19 and the coil end and the side wall of the brake drum 12 are located with respect to the axial space. The dimension that adds two of the necessary creepage distances is secured.

  In addition, it is known that the torque increases slightly though the axial length of the permanent magnet 17 is made larger than the thickness of the stator core 18. In order to exert such an effect, the permanent magnet 17 may be extended to the sheave side. In this case, the end surface of the permanent magnet 17 on the side opposite to the sheave may be extended as long as the crossover wire 30 and the crossover fixing member 31 can be installed.

  On the other hand, for the radial space, the dimension obtained by adding the thickness of the outer peripheral portion of the brake drum 12 and the thickness of the permanent magnet 17, the gap between the outer peripheral portion of the brake drum 12 and the housing 11, and the rotation of the stator The space to which the air gap between the children is added becomes the installation space for the connecting wire 30 and the fixing member 31 for the connecting wire, but the thickness of the outer peripheral portion of the brake drum 12 is the dominant dimension.

  The outer peripheral portion of the brake drum 12 used in the elevator hoisting machine needs to be sufficiently strong against the pressing force of the brake pad 23. Further, the brake pad 23 needs to be thick in order to reduce the impact sound when hitting the brake drum 12. That is, the thickness of the outer peripheral portion of the brake drum 12 is not determined by the magnetically required thickness as the rotor, but is determined by the required thickness as the braking member. In the brake drum 12 used in the elevator hoist 1, the thickness necessary for the braking member is larger than the thickness magnetically necessary for the rotor. Therefore, the connecting wire 30 and the fixing member 31 for the connecting wire are provided. Sufficient space can be secured for installation.

  The configuration of the brake drum 12 described above is a feature of a thin hoisting machine in which the core function of the rotor is also used by the brake drum 12, and is not limited to this in the case of a general motor.

  Further, as shown in FIG. 6, the crossover fixing member 31 is an annular ring having a U-shaped cross section formed of resin or the like, and is fixed to the housing 11 with an interference fit fitting or an adhesive. The crossover wire 30 is buried in the recessed portion of the U-shape. The jumper wire is composed of four wires in total, three of U phase, V phase and W phase and one neutral point, and is connected to each coil end of the stator winding 19 by caulking or the like. The crossover wire 30 and the fixing member 31 are intermittently fixed by thread tying in the circumferential direction, and the fixing member 31 is provided with a dent for passing the fixing thread 33.

  Further, as shown in FIG. 7, in order to facilitate the connection of the coil ends of the crossover wire 30 and the stator winding 19, the winding start and the winding end of the stator winding 19 are on the outer peripheral side. It is good. FIG. 7 is a cross-sectional view of one stator winding 19, starting winding the coil from the outer peripheral side toward the inner peripheral side, the second layer winding from the inner peripheral side toward the outer peripheral side, The third layer is wound so as to wind from the outer peripheral side toward the inner peripheral side, but the number of turns is adjusted so that the end of winding of the outermost layer portion is on the outer peripheral side.

  In order to bring the lead wire out of the hoisting machine, as shown in FIG. 5, a hole 40 connected to the fixing member 31 of the crossover wire is provided on the upper end or lower end portion of the housing 11 toward the inner peripheral side.

  In addition, a through hole 32 is provided at a position connecting to the hole 40 of the housing 11 on the bottom surface of the recessed portion of the fixing member 31 of the connecting wire, and the lead wire connected to the connecting wire 30 is passed through the hole 32 and the hole 40. It can be put out on the upper end surface or the lower end surface of the housing 11. Note that the crossover wire 30 and the lead wire may be used together, and the crossover wire 30 may be provided outside the housing 11.

  With the above configuration, the holes necessary for leading the lead wire to the upper end or the lower end of the casing 11 can be reduced, and the strength and rigidity of the casing 11 are not reduced. There is no need to increase the thickness of the hoisting machine, and the hoisting machine can be made thinner.

(2) Effects of the present embodiment As described above, according to the present embodiment, the elevator hoist 1 in which the stator windings are concentrated windings, the casing 11 that supports the suspension load of the elevator. A main shaft 13 whose one end is cantilevered and supported on the housing 11, a bearing housing 16 rotatably mounted via a bearing 14 fixed to the other end of the main shaft 13, and a bearing housing 16. The assembled sheave 10 and the sheave 10 rotate integrally with each other, and brake the outer peripheral surface of the brake drum 12 that is larger in diameter and cylindrical than the sheave 10 and the brake drum 12 fixed to the housing 11. A brake device, a motor rotor of a permanent magnet motor configured on the inner peripheral surface of the brake drum 12, and an inner radial direction facing the motor rotor of the permanent magnet motor, and fixed to the housing 11 Motor stator and motor And a plurality of stator windings 19 fixed to the stator stator, and the inside of the casing 11 has a bottomed cylindrical shape larger than the outer diameter of the motor rotor and the brake drum 12, and the casing A cylindrical portion of the body 11 is formed so as to cover the outer peripheral surfaces of the motor rotor and the brake drum 12, and the connecting wire of the stator winding 19 is connected to the side surface of the brake drum 12 and the motor rotor and the housing 11 is provided. It is fixed to the bottom outer periphery of the bottom cylindrical shape. By adopting such a configuration, a sufficient space for installing the crossover of the stator winding 19 in the casing 11 is secured, and the crossover of the stator winding 19 is connected to the upper end of the casing 11 or It can be installed in the vicinity of the lower end, and the hole for leading the lead wire connected to the connecting wire to the outside of the housing 11 can be made small. Thus, the elevator hoisting machine can be thinned without reducing the strength and rigidity of the housing 11.

(3) Other Embodiments An annular laminated electromagnetic steel plate may be fixed to the inner peripheral surface of the brake drum 12, and the permanent magnet 17 may be attached to the inner peripheral surface of the laminated electromagnetic steel plate. In this case, the end surface of the outer periphery of the brake drum 12 on the side opposite to the sheave is not necessarily the same as the end surface on the side opposite to the sheave of the motor stator, and may be shorter to the side of the sheave.

  Alternatively, an annular laminated electromagnetic steel plate may be fixed to the inner peripheral surface of the brake drum 12 and the permanent magnet 17 may be embedded inside the laminated electromagnetic steel plate.

  Moreover, if the housing | casing 11 is cylindrical, material and weight can be restrained and manufacturing cost, transportation cost, etc. can be restrained. However, since there is a relatively dimensional allowance in the vertical direction of the hoisting machine, if the rectangular shape or the square shape is better depending on the wiring and the manufacturing method, such a case may be used. However, in that case, the crossover wire 30 is preferably fixed to the bottom outer peripheral side of the bottomed concave shape of the housing in a circular shape along the side surface direction of the motor rotor.

DESCRIPTION OF SYMBOLS 1 Thin hoisting machine 2 Hoistway wall 3 Riding car 4 Counterweight 5 Guide rail for counterweight 6 Guide rail for countercar 7 Rope 10 Sheave 11 Housing 12 Brake drum 13 Main shaft 14 Bearing 15 Bearing cover 16 Bearing housing 17 Permanent magnet 18 Stator core 19 Stator winding 21 Brake device 22 Electromagnet 23 Brake pad 24 Rod 25 Insulating material 30 Crossover wire 31 Crossover wire fixing member 33 Crossover wire fixing thread

Claims (7)

An elevator hoisting machine in which the stator winding is a concentrated winding,
A housing that supports the suspension load of the elevator,
A main shaft having one end fixedly supported by the housing;
A bearing housing rotatably mounted via a bearing fixed to the other end of the main shaft;
A sheave integrated with the bearing housing;
Rotating integrally with the sheave, a larger diameter and cylindrical brake drum than the sheave,
A brake device for braking the outer peripheral surface of the brake drum fixed to the housing;
A motor rotor of a permanent magnet motor configured on the inner peripheral surface of the brake drum;
A motor stator that is arranged opposite to the inner radial direction of the rotor of the permanent magnet motor and is fixed to the housing;
A plurality of stator windings fixed to the motor stator;
With
The inside of the housing has a bottomed concave shape larger than the outer diameters of the motor rotor and the brake drum, and the outer periphery of the housing covers the outer peripheral surfaces of the motor rotor and the brake drum. The connecting wire of the stator winding formed is fixed to the side surface direction of the brake drum and the motor rotor and to the outer peripheral side of the bottom of the bottomed concave shape of the housing. Hoisting machine. The casing is provided with a hole or notch for leading the lead wire to the outside of the elevator hoist, and the hole or notch is directed from the upper end or the lower end of the casing toward the inner peripheral side. The lead wire connected to the lead wire of the stator winding is drawn out of the elevator hoisting machine through the hole or notch hole. The elevator hoist according to claim 1. The winding machine for an elevator according to claim 1, wherein the winding start and the winding end of the stator winding are on the outer peripheral side. The crossover of the stator winding is installed in a crossover-shaped crossover fixing member having a U-shaped cross-section, and the bottom of the U-shaped portion of the crossover fixing member has a hole in the housing. Or the hole for letting a lead wire pass is provided so that it may adjoin with a notch hole. The elevator hoisting machine of Claim 2 characterized by the above-mentioned. The connecting wire of the stator winding and the connecting wire fixing member are intermittently fixed in the circumferential direction by thread tying, and the connecting wire fixing member is provided with a recess for allowing the fixing thread to pass through. The elevator hoisting machine according to claim 4, wherein the hoisting machine is an elevator. The elevator hoist according to claim 1, wherein an end surface of the motor rotor on the side opposite to the sheave and an end surface on the side opposite to the sheave of the motor stator are the same surface with respect to the axial direction. Machine. The elevator hoisting machine according to claim 1, wherein a radial thickness of an outer peripheral portion of the brake drum is larger than a radial thickness of the motor rotor or the permanent magnet.

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