JP2008308312A - Elevator hoist - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hoist in which reduction in diameter and integration of storage of the hoist are implemented and ease of maintenance such as ease of replacement work of, in particular, a bearing is improved. <P>SOLUTION: Drive motors 25, 26 of the hoist have structure of an only inner stator mechanism (the stator 26), and an outer rotor 19 has a shape integrated with a sheave 15 and has, as a braking part, a brake disc 17 of a part of a braking mechanism. In proportion to reduction in diameter of the sheave 15, sizes of the brake disc 17 and hoisting drive motors 25, 26 can be reduced. A space for storing the hoist can be totally saved. For improving the ease of maintenance, an elevator hoist device and structure of a bearing 23 of a motor shaft as a rotating part are detachable adapter mechanisms to facilitate replacement of the bearing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator hoisting machine, and more particularly to an elevator hoisting machine having improved maintainability and space saving.

  Various types of gearless elevator hoisting machines that do not use gears have been developed. An example of a conventional elevator hoisting machine is shown in FIG. The elevator hoisting machine 50 shown in FIG. 6 supports a rotating shaft 54 rotatably by a pair of bearings 52 and 53 installed on a base 51. A DC motor 55, a sheave 56, and a brake drum 57 are sequentially provided on the rotating shaft 54. A current is supplied to the DC motor 55 through a commutator, and a rope used for raising and lowering the elevator car is wound around the sheave 56.

  As another elevator hoisting machine, there is one using a rotating field type synchronous motor. On the base, the first support column and the second support column are arranged separately, and the first support column is used as the first support column. The support shaft on which the armature 24 is arranged is fixed, and the support shaft on which the sheave is arranged is fixed to the second support column via a bearing. For this reason, the sheave is supported in a cantilever manner. A permanent magnet is disposed on the inner peripheral surface of the brake wheel integrally formed with the sheave. The permanent magnet and the armature constitute a rotating field type synchronous motor.

  In addition, there is an elevator hoisting machine, and more particularly, a technique for reducing the size and weight of a gearless hoisting machine in which a sheave, an electric motor, and a disc brake device are integrated.

  In the conventional hoisting machine, when the gap between the permanent magnet and the armature (the gap between the armature 55a and the permanent magnet 55b in FIG. 6) is increased, the characteristics of the motor are reduced, and the inclination (the armature 55a in FIG. 6) is reduced. In order to reduce the inclination of the opposing surfaces of the permanent magnet 55b and the permanent magnet 55b, the manufacturing cost is increased by increasing the mechanical accuracy. In addition, as an elevator hoisting machine, as part of its miniaturization, the structure of the motor and the hoisting machine is being integrated, but this has a problem in that the maintainability is impaired. That is, the bearing has a limited life and needs to be replaced periodically. In addition, there are cases where these parts are difficult to handle and may be damaged or broken immediately after the hoisting machine starts operating. Therefore, although the workability of replacing the bearing is important, if the housing of the hoisting machine and the motor housing are integrated, the bearing cannot be replaced unless the motor is disassembled. While the elevator is in operation, it is virtually impossible to disassemble and reassemble the motor in the building, and each hoist must be replaced, which requires a large amount of money and time.

The disc brake device is composed of a brake disc having one side plate of the sheave having a large diameter, a brake pad that is contacted and separated from both sides in the axial direction of the brake disc, and a brake kit that supports and drives the brake pad. Yes. The minimum diameter of the sheave is determined by the diameter of the rope and the minimum bending radius of the rope. The dimensions necessary for the insertion of the rope are secured outside the sheave, and brake pads are provided. Since the distance from the center of the shaft is limited by these dimensions, there is a disadvantage that it cannot be designed to a target dimension. As a result, the diameter of the brake disc and the distance from the center of the disc brake device have become larger than necessary, and the overall height and width of the gearless hoisting machine has also increased.
Japanese Utility Model Publication No. 49-149201 (FIG. 1) Japanese Patent Publication No. 5-21830 (Fig. 1) Japanese Patent Publication No. 2003-34478

  Therefore, in an elevator hoist, there is a problem to be solved in that it is possible to easily remove and incorporate only a bearing in a building without disassembling the motor.

  This invention was made to solve the above problems, and its purpose is to shorten the axial length of the electric motor that drives the sheave to rotate, and to prevent gap rubbing, It is an object of the present invention to provide an elevator hoisting machine that can reduce the height and width of a brake device that brakes a sheave, and that can save space, such as axial accommodation and overall diameter reduction. In particular, an object of the present invention is to provide a hoisting machine and an elevator hoisting machine that can further reduce the space for its peripheral devices and improve the maintainability associated therewith.

  An elevator hoisting machine according to the present invention includes an outer rotor type motor unit including a stator and a rotor arranged outside the stator, a sheave that is directly connected to the rotor and winds up an elevator cable A rotating portion having a rotating shaft for rotatably supporting the sheave, and a fixing portion that is disposed to face the motor portion across the rotating portion and has a braking mechanism that applies braking to the sheave. In the elevator hoist apparatus provided, the rotating shaft is provided on the stator of the motor unit and extends close to the rotating unit, and a second bearing unit provided on the fixed unit. And the first bearing part is detachably attached to the stator of the motor part.

  Further, an outer rotor type motor unit including a stator and a rotor disposed outside the stator, a sheave that is directly connected to the rotor and winds up the rope for the elevator, and for rotatably supporting the sheave In an elevator hoisting machine provided with a rotating part provided with a rotating shaft, and a fixing part arranged to face the motor part across the rotating part and having a braking mechanism for braking the sheave, The rotating shaft is supported via a first bearing portion provided on the stator of the motor portion and a second bearing portion provided on the fixed portion and extending close to the rotating portion, The second bearing part is detachably attached to the fixed part.

  According to the elevator hoist according to the present invention, the first bearing portion or the second bearing portion is detachably attached to the stator or the fixed portion of the motor portion, so that the motor is not disassembled. Only the bearing can be removed and assembled.

  In the elevator hoisting machine described above, a fixed base bearing provided opposite to the end of the rotor, and the boss shape of the bearing can be removed from the embedded system (Spring ring fixing) so that the bearing can be easily replaced. Can be a mechanism.

  In the elevator hoisting machine, the replacement of the rotor and the stator side bearing can be replaced with a detachable mechanism, and a structure that promotes improvement in maintainability can be achieved.

  According to the elevator hoisting machine of the present invention, the intermediate pillow block (the block in which the bearing 52 is provided in FIG. 6) of the device (the hoisting drive motor, the rotating shaft, the brake unit, the sheave, and the fixed mount) is removed, and the hoisting machine is removed. The upper drive motor is a mechanism having only an inner stator (stator).

  Further, according to the present invention, as a maintenance additional function, the bearing portion of the hoisting drive motor (stator) side rotating shaft is manufactured by a boss-shaped bearing mechanism that can be detached from the conventional hermetic type. In addition, it is possible to take quick measures against malfunctions / failures caused by damage, and to improve maintainability. The outer rotor (rotor) is integrated with the rotary hoisting drum unit, and includes a brake disk that is a part of the braking mechanism as a braking unit. The rotor of the outer rotor and the sheave can be fixed integrally, and the diameter of the sheave is reduced, and in proportion to this, the brake disk and the hoisting drive motor that is the braking portion are reduced in size. In addition, the entire hoisting machine can be accommodated and the space can be saved.

  The best mode for carrying out an elevator hoist according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view showing an elevator hoist according to a first embodiment of the present invention. In FIG. 1, the vicinity of the center line is partially broken, and the other portions are externally shown.

  The elevator hoisting machine includes a sheave case 11 that covers the right end in the figure and a frame 12 that is open on one end side (right end side) as a casing that covers the outside, and is not shown in detail in the drawing. The sheave case 11 and the frame 12 constituting these cases are coaxially coupled to each other by in-row coupling. In order to fix and support the elevator hoisting machine at the installation location, the sheave case 11 and the frame 12 forming the housing are supported by the installation location by the mounting legs 13.

  The first rotating unit 14 is integrally coupled to the sheave 15, the motor side end plate 16, and the brake disk (brake rotating body) 17. The second rotating portion 18 is formed integrally with the rotor 19. Both rotating parts are connected to each other, and the sheave 15 and the rotor 19 are fixed. Therefore, both rotation parts of the 1st rotation part 14 and the 2nd rotation part 18 constitute one rotation part, and it rotates coaxially and synchronously with rotation of a motor.

  The sheave case 11 covers the first rotating part 14, but supports the rotating shaft of the first rotating part 14 via the bearing 22 on the brake side end plate 27 side so as to be rotatable. On the motor side of the first rotating portion 14, the frame 12 is rotatably supported via a bearing 23. Accordingly, the first rotating portion 14 and the second rotating portion 18 that are configured as one rotating portion are rotatably supported by the bearings 22 and 23 with respect to the outer casing composed of the sheave case 11 and the frame 12, respectively. Yes. The bearing 23 is detachably attached to the frame 12.

  A brake body (brake brake body) 24 is provided on the top of the sheave case 11. The brake body 24 includes a brake pad that sandwiches the brake disk 17 and an actuator that presses the brake pad against the brake disk 17, and the brake pad is supported by the brake body 24 so as to be able to advance and retreat with respect to the brake disk 17. By sandwiching the brake disc 17 with the brake pad, the first rotating portion 14 and the second rotating portion 18 can be braked.

  A permanent magnet 25 is provided on the inner peripheral surface of the rotor 19. On the other hand, the frame 12 includes a stator 26 having a stator winding 28. The stator 26 is disposed so as to face the permanent magnet 25 in the radial direction. The rotor 19 provided with the permanent magnet 25 and the stator 26 provided with the stator winding 28 constitute a synchronous motor.

Next, the structure of the 1st rotation part 14 and the 2nd rotation part 18 is demonstrated in detail. As described above, the first rotating portion 14 is configured by integrating the sheave 15, the motor side end plate 16 and the brake disc 17. The sheave 15 has a cylindrical shape, and can wind or rewind a rope that hangs the elevator cage and moves it up and down around the outer peripheral surface.
The brake side end plate 27 has a ring shape around the rotation shaft, and is positioned on one end side (right end side) of the sheave 15. The rotating shaft of the first rotating portion 14 extends further from the brake side end plate 27 to the right side in the drawing in the rotating shaft direction, and this extending portion is supported by the bearing 22.

  As described above, the second rotating unit 18 is fixed to the rotor 19 and integrally configured. The rotor 19 has a cylindrical shape, and the motor side end plate 16 of the support portion that receives the rotation shaft has a ring shape around the rotation shaft. Specifically, the motor-side end plate 16 is inside the rotor 19 and forms a surface facing the motor-side surface of the second rotating portion 18, and the motor-side end plate 16 is the second rotating portion. It positions so that it may become 18 opposing surfaces.

  FIG. 2 is a front view showing a partial cross section of the elevator hoisting machine 10A according to the second embodiment of the present invention. In the elevator hoisting machine 10A, in the first rotating portion 14A, a brake drum 17A is integrally formed with the sheave 15 and the brake side end plate 27 instead of the brake disk.

The brake body 24A includes a brake piece (brake band, brake shoe, etc.) that contacts the brake drum 17A and an actuator that operates the brake piece toward the brake drum 17A. The brake piece contacts the brake drum 17A. The rotating part can be braked by exerting a frictional action.
The configuration of the other parts is the same as that of the first embodiment shown in FIG.

The elevator hoisting machine according to the third embodiment shown in FIG. 3 is a modification of the first embodiment shown in FIG. That is, in the first embodiment, the bolt 21 is inserted from the rotor 19 side, but in the third embodiment, the bolt 21 is inserted from the sheave case 11 side. Further, the rotor 19 and the sheave case 11 may have different shapes (thickness shape, etc.), but this is not an essential difference but a shape change caused by a difference in bolt insertion direction.
The configuration of the other parts is the same as that of the first embodiment shown in FIG.

The elevator hoisting machine according to the fourth embodiment shown in FIG. 4 is a modification of the second embodiment shown in FIG. That is, in Example 2, the bolt 21 is inserted from the rotor 19 side, but in Example 4, it is inserted from the sheave case 11 side. The rotor 19 and the sheave case 11 may have different shapes (thickness shapes), but this is not an essential difference but a shape change caused by a difference in bolt insertion direction.
The configuration of other parts is the same as that of the second embodiment shown in FIG.

  FIG. 5 shows details of an integral bearing portion used in the elevator hoist according to the present invention. The integrated bearing portion 30 shown in FIG. 5 (a) has a structure in which the hoisting machine shown in FIGS. 3 and 4 is taken out, but is used in the hoisting machine shown in FIGS. It differs from that shown only in that it is a left-right inverted type, and has substantially the same structure.

  FIG. 5B is an exploded view of the integrated bearing portion 30. The main shaft 31 that is a main element constituting the first rotating portion 14 is symmetrical, and both ends of the main shaft 31, that is, the motor side end portion 32 and the fixed portion side end portion 33 are the remainder of them. The intermediate portion 34, which is a portion, is divided as a reduced diameter portion by step portions 35 and 36. The bearing 22 of the first bearing portion and the bearing 23 of the second bearing portion are respectively applied to the motor side end portion 32 and the fixed portion side end portion 33 formed in the reduced diameter portion. As the bearings 22 and 23, self-aligning ball bearings of the same type can be used.

  The self-aligning ball bearing is composed of an inner ring having two rows of races, a spherical rolling element, and a spherical outer ring, and has a self-aligning property. A radial load and a thrust load in both directions can be supported. Since the ball center of the raceway surface of the outer ring coincides with the center of the bearing, and the inner ring, rolling elements, and cage can be freely tilted with respect to the outer ring, Machining errors, mounting errors, and shaft misalignments can be absorbed.

  The adapter 40 shown in exploded view in FIG. 5B and in FIG. 5C as a view A (left side view) is a bearing 23 that supports the rotating shaft (examples of FIGS. 1 and 2). In this case, a boss portion 41 for holding the bearing 22) and a flange portion 42 extending in the radial direction from the boss portion 41 are provided, and a center hole 43 into which the fixed portion side end portion 33 of the main shaft 31 enters is formed. ing. In the adapter 40, a recess 44 into which the bearing 23 is fitted is formed on the inner peripheral side of the boss portion 41, and a bolt 21 (FIGS. 1 to 4 is inserted through the flange portion 42 to be fixed to the sheave case 11. A plurality of bolt holes 45 are formed.

  5D shows the main shaft 31, FIG. 5E shows the side end plate 46, and FIG. 5F shows the bearings 22 and 23 as viewed from the direction A in FIG. 5B. . The side end plate 46 is a component that is disposed in contact with the stepped portion 36 of the main shaft 31, and cooperates with the adapter 40 to sandwich and hold the bearing 23 in the axial direction.

  In the integrated bearing portion 30, the main shaft 31 and the bearings 22 and 23 are structurally symmetrical, so that the number of components and their management are easy, and there is no need to consider the directionality when assembling. The bearing 22 is assembled to one end 32 of the main shaft 31, and the side end plate 46, the bearing 23, and the adapter 40 are assembled to the other end 33. The integrated bearing portion 30 assembled in this way can be applied to any type of elevator hoisting machine shown in FIGS. By screwing the bolt into the sheave case 11 (or the frame 12) through the bolt hole 45 formed in the flange portion 42 of the adapter 40, the integrated bearing portion 30 is detachably attached to the elevator hoist. When maintenance or replacement of the motor, sheave 15, or bearings 22, 23, etc., the integrated bearing portion 30 can be removed or attached as a unit, and a significant improvement in workability is expected.

  INDUSTRIAL APPLICABILITY The present invention can be used for an elevator hoisting machine used for hoisting and lowering an elevator.

The block diagram which shows the elevator hoisting machine which concerns on Example 1 of this invention. The block diagram which shows the elevator hoisting machine which concerns on Example 2 of this invention. The block diagram which shows the elevator hoisting machine which concerns on Example 3 of this invention. The block diagram which shows the elevator hoisting machine which concerns on Example 4 of this invention. The block diagram which shows the conventional elevator hoisting machine. The block diagram which shows the conventional elevator hoisting machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Sheave case 12 Frame 13 Mounting leg 14,14A 1st rotation part 15 Sheave 16 Motor side end plate 17 Brake disc (brake rotation body) 17A Brake drum 18 2nd rotation part 19 Rotor 20 Motor side end plate 21 Bolt 22, 23 Bearing 24, 24A Brake body (brake brake body)
25 Permanent Magnet 26 Stator 27 Brake End Plate 28 Stator Winding 30 Integrated Bearing 31 Main Shaft 32 Motor Side End 33 Fixed Part End 34 Intermediate Part 35, 36 Step 40 Adapter 41 Boss Part 42 Flange Part 43 Center hole 44 Recess 45 Bolt hole 46 End plate

Claims (9)

An outer rotor type motor unit having a stator and a rotor disposed outside the stator, a sheave that is directly connected to the rotor and winds up the rope for the elevator, and a rotating shaft for rotatably supporting the sheave And an elevator hoisting device provided with a fixing portion having a braking mechanism that is disposed to face the motor portion and sandwiches the rotating portion and applies braking to the sheave.
The rotating shaft is supported via a first bearing portion provided on the stator of the motor portion and extending close to the rotating portion, and a second bearing portion provided on the fixed portion,
The elevator hoisting machine, wherein the first bearing part is detachably attached to the stator of the motor part. In the elevator hoisting machine according to claim 1,
The first bearing portion includes an adapter having a boss portion that holds the bearing that supports the rotating shaft, and a flange portion that extends in a radial direction from the boss portion, and the first bearing portion includes the flange of the adapter. The part is detachably attached to the stator by being detachably attached to the stator.
This is an elevator hoisting machine. In the elevator hoisting machine according to claim 1,
The rotating shaft has a reduced diameter portion having the same structure divided by a step with respect to the remaining portion at the motor portion side end portion and the fixed portion side end portion, and the first bearing portion and the second bearing portion. The bearing provided in the bearing portion is applied to the reduced diameter portion,
This is an elevator hoisting machine. In the elevator hoisting machine according to claim 1,
The bearings provided in the first bearing part and the second bearing part are self-aligning bearings,
This is an elevator hoisting machine. An outer rotor type motor unit having a stator and a rotor disposed outside the stator, a sheave that is directly connected to the rotor and winds up the rope for the elevator, and a rotating shaft for rotatably supporting the sheave And an elevator hoisting machine including a rotating part provided with a fixing part that is disposed to face the motor part across the rotating part and has a braking mechanism that applies braking to the sheave.
The rotating shaft is supported via a first bearing portion provided on the stator of the motor portion and a second bearing portion provided on the fixed portion and extending close to the rotating portion,
The second bearing portion is detachably attached to the fixed portion.
This is an elevator hoisting machine. The elevator hoisting machine according to claim 5,
The second bearing portion includes an adapter having a boss portion that holds the bearing that supports the rotating shaft and a flange portion that extends in a radial direction from the boss portion, and the second bearing portion includes the flange of the adapter. The part is detachably attached to the stator by being detachably attached to the stator.
This is an elevator hoisting machine. The elevator hoisting machine according to claim 5,
The rotating shaft has a reduced diameter portion having the same structure divided by a step with respect to the remaining portion at the motor portion side end portion and the fixed portion side end portion, and the first bearing portion and the second bearing portion. The bearing provided in the bearing portion is applied to the reduced diameter portion,
This is an elevator hoisting machine. The elevator hoisting machine according to claim 5,
The bearings provided in the first bearing part and the second bearing part are self-aligning bearings,
This is an elevator hoisting machine. In the elevator hoisting machine according to claim 1 or 5,
The brake mechanism includes a brake drum or a brake disk integrally attached to the sheave, a brake friction member provided in the fixed portion, and a brake actuator that presses the brake friction member against a brake surface of the brake drum or the brake disk. An elevator hoisting machine characterized by comprising:

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