CN107848761B

CN107848761B - Elevator traction machine and elevator

Info

Publication number: CN107848761B
Application number: CN201580081931.1A
Authority: CN
Inventors: 松本达也; 尾方尚文
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2015-08-28
Filing date: 2015-08-28
Publication date: 2020-05-19
Anticipated expiration: 2035-08-28
Also published as: KR20180021120A; WO2017037777A1; JP6405053B2; CN107848761A; JPWO2017037777A1; KR101954585B1

Abstract

The invention aims to realize the light weight and the miniaturization of the whole size of a tractor for an elevator. In a hoist for an elevator provided with an electromagnetic brake device (15), the electromagnetic brake device (15) comprises: brake shoes (27a, 27b), an armature (28), a main body (33), a stopper (35), and a floating device (42), and is cantilever-supported movably in the axial direction by at least 2 shaft members (5), the shaft members (5) being mounted on a casing (1a) of a hoisting machine via a brake bracket (50). The shaft member (5) includes: a support shaft (37) that is inserted into the electromagnetic brake device (15) and that supports the electromagnetic brake device (15) so as to be movable in the axial direction; and a flange portion (38) provided at one end portion of the support shaft (37), the stopper (35) and the floating device (42) being mounted on the flange portion (38).

Description

Elevator traction machine and elevator

Technical Field

The present invention relates to a hoisting machine for an elevator and an elevator.

Background

In recent elevator apparatuses, for the purpose of suppressing the height of a building, a so-called machine room-less elevator apparatus in which machines such as an elevator hoisting machine (hereinafter, simply referred to as a hoisting machine) are installed in a hoistway, instead of installing a machine room in an upper part of the hoistway, has been widely used.

In the case of this machine room-less elevator apparatus, all machines including a hoisting machine conventionally installed in a machine room are installed in a hoistway. There are various structures for installing a hoisting machine in an elevator shaft, and in order to install a hoisting machine in an elevator shaft, it is necessary to reduce the size and weight of the hoisting machine. Of course, in the conventional elevator apparatus provided with the machine room, the reduction in size and weight of the hoisting machine is also required.

As a conventional hoisting machine, for example, patent document 1 describes "a rotor of a motor, a drive sheave for winding up a hoisting rope, and a brake disc of a disc brake are integrated to form a rotor module. The rotor module is rotated by a magnetic force acting between a stator and a rotor of a motor provided in the base module, and a friction member of a disc brake is brought into pressure contact with a side surface of a brake disc to stop rotation of the rotor module. "such techniques (refer to abstract of the specification).

As the hoisting machine, for example, there is a hoisting machine having a configuration shown in fig. 8A to 8C. Fig. 8A is an external view (left side view) of the hoisting machine 110 according to a comparative example of the present invention, as viewed from the side opposite to the side on which the sheave 114 is provided. Fig. 8B is an external view (front view) of the hoisting machine 110 according to a comparative example of the present invention as viewed from the front. Fig. 8C is an external view (right side view) of the hoisting machine 110 according to the comparative example of the present invention, as viewed from the sheave 114 side.

The hoisting machine 110 shown in fig. 8A to 8C is fixedly installed in a machine room, a pit inner wall of a hoistway, or the like, and winds up a hoisting rope connected to a car of an elevator apparatus by a predetermined operation. The traction machine 110 includes: a housing 101; a sheave 114 around which a hoisting rope is wound and which is rotatably mounted on the housing 101; a brake disc 126 provided integrally with the sheave 114 and rotating; and an electromagnetic braking device 115 that brakes the brake disk 126. The electromagnetic brake device 115 is fixed to the housing 101 via a large support bracket 147 surrounding the electromagnetic brake device.

Fig. 9 is an enlarged plan view of a main portion of the electromagnetic brake device 115 shown in fig. 8A as viewed from the IX direction. The stopper 115 is supported by the support shaft 137 so as to be movable in the axial direction of the support shaft 137, and the support shaft 137 is supported at both ends by the support brackets 147.

Since the conventional hoisting machine is configured by a so-called outer rotor type motor, a large braking force is required when the rotor unit is braked. Therefore, in order to secure a predetermined amount of braking force applied to the brake disk, 2 independent electromagnetic brake devices 115 are provided for the brake disk 126.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2004-299824

Disclosure of Invention

Problems to be solved by the invention

However, the support bracket for supporting the electromagnetic brake device needs to secure sufficient strength against an excessive torque at the time of emergency braking received by the electromagnetic brake device, and is formed thick and large in size because both ends of the support shaft are fixed to the bracket 147 in order to stably hold the support shaft. Therefore, in order to reduce the size and weight of the hoisting machine, it is necessary to improve the mounting structure for mounting the electromagnetic brake device to the housing. In addition, reduction in size and weight of the hoisting machine is also required in terms of workability in the construction of the elevator apparatus.

The invention aims to realize the light weight and the miniaturization of the whole size of a tractor for an elevator.

Means for solving the problems

In order to achieve the above object, an elevator hoisting machine according to the present invention includes: a housing; a rope wheel rotatably mounted on the housing for winding the rope; a brake disc which is integrally provided with the sheave and rotates; and an electromagnetic brake device that brakes the brake disk, the electromagnetic brake device including: a pair of brake shoes for braking the brake disc; an armature holding one of the pair of brake shoes; a main body that holds the other of the pair of brake shoes; a stopper for restricting movement of the armature in a specific direction away from the brake disk; and a floating device that biases the main body in the specific direction, wherein the electromagnetic brake device is supported by a cantilever via at least 2 shaft members that are mounted to the housing via a brake bracket, and the shaft member includes: a support shaft that is inserted into the electromagnetic brake device and supports the electromagnetic brake device so as to be movable in an axial direction; and a flange portion provided on one end side of the support shaft, wherein the stopper and the floating device are attached to the flange portion.

Effects of the invention

According to the present invention, the weight reduction and the overall size reduction of the hoisting machine can be achieved. Problems, structures, and effects other than those described above will be described with reference to the following embodiments.

Drawings

Fig. 1A is an external view (left side view) of a hoisting machine 10 according to an embodiment of the present invention, as viewed from the side opposite to the side on which a sheave 14 is provided.

Fig. 1B is an external view (front view) of the hoisting machine 10 according to the embodiment of the present invention as viewed from the front.

Fig. 1C is an external view (right side view) of the hoisting machine 10 according to the embodiment of the present invention, as viewed from the sheave 14 side.

Fig. 2 is a II-II sectional view of the traction machine 10 shown in fig. 1C.

Fig. 3A is an enlarged plan view of a main portion of the electromagnetic brake device 15 shown in fig. 1C as viewed from the direction III.

Fig. 3B is a plan view of the electromagnetic brake device 15 shown in fig. 3A as viewed from the IIIB direction.

Fig. 3C is a plan view of the electromagnetic brake device 15 shown in fig. 3A as viewed from the IIIC direction.

Fig. 4 is a diagram showing a state of the electromagnetic brake device 15 shown in fig. 3A when the brake is applied.

Fig. 5 is a diagram showing a state in which the brake of the electromagnetic brake device 15 shown in fig. 3A is open.

Fig. 6 is a rear view of the hoist 10 according to the embodiment of the present invention, and is a diagram showing a state at the time of brake maintenance.

Fig. 7 is a schematic diagram showing an outline of an elevator apparatus 67 to which the hoisting machine 10 of the present invention is applied.

Fig. 8A is an external view (left side view) of the hoisting machine 110 according to a comparative example of the present invention, as viewed from the side opposite to the side on which the sheave 114 is provided.

Fig. 8B is an external view (front view) of the hoisting machine 110 according to a comparative example of the present invention as viewed from the front.

Fig. 8C is an external view (right side view) of the hoisting machine 110 according to the comparative example of the present invention, as viewed from the sheave 114 side.

Fig. 9 is an enlarged plan view of a main portion of the electromagnetic brake device 115 shown in fig. 8A as viewed from the IX direction.

Detailed Description

An embodiment of an elevator apparatus including a hoisting machine 10 to which the present invention is applied will be described with reference to fig. 6. Fig. 7 is a schematic diagram showing an outline of an elevator apparatus 70 to which the hoisting machine 10 of the present invention is applied. In the present embodiment, a machine-room-less elevator apparatus in which machines are installed in a hoistway will be described as an example. The hoisting machine 10 to which the present invention is applied can also be used for an elevator apparatus of a system in which a machine room is disposed.

A car 61, a counterweight 62, and a hoisting machine 10 are disposed inside the hoistway 60. The hoisting machine 10 is disposed in a gap between a wall surface of the hoistway 60 and the car 61. One end of a rope 63 wound around the sheave 14 is connected to the top portion 60a via a pulley 64a provided on the top portion 60a of the hoistway 60 and

pulleys

65a and 65b provided on the lower portion of the car 61. The other end of the rope 63 is connected to the top portion 60a via a pulley 64b provided on the top portion 60a and a pulley 66 provided on the counterweight 62.

The elevator apparatus 70 raises and lowers the car 61 in the hoistway 60 by operating the rope 63 with the sheave 14 of the hoisting machine 10. That is, the car 61 is lifted and lowered by operating the rope 63 connected to the car 61 with the sheave 14. A control device 67 for controlling the hoisting machine 10 is provided.

Hereinafter, an embodiment of a hoisting machine according to the present invention will be described with reference to the drawings.

The structure of the hoisting machine 10 will be described with reference to fig. 1A, 1B, 1C, and 2. Fig. 1A is an external view (left side view) of a hoisting machine according to an embodiment of the present invention, as viewed from the side opposite to the side on which a sheave is provided. Fig. 1B is an external view (front view) of the hoisting machine according to the embodiment of the present invention as viewed from the front. Fig. 1C is an external view (right side view) of the hoisting machine according to the embodiment of the present invention as viewed from the sheave side. Fig. 2 is a sectional view II-II of the traction machine shown in fig. 1C.

The hoisting machine 10 of the present embodiment is mainly configured by including a casing 1, a sheave 14 rotatably attached to the casing 1 and around which a rope is wound, a brake disc 26 provided integrally with the sheave 14 and rotating, and an electromagnetic brake device 15 for braking the brake disc 26.

The housing 1 has an annular housing recess 21 formed on the front surface side, and a bottomed cylindrical support wall 17 is provided to protrude from the front end of the boss portion 16 remaining in the center of the housing recess 21. A shaft hole 18 is formed at the axial center position of the support wall 17 and the boss portion 16 so as to penetrate the housing 1. A main shaft 19 is fixed to the shaft hole 18. Further, a stator 22 of the motor 7 is attached to a side surface on the inner peripheral side of the housing recess 21 (an outer peripheral wall surface of the support wall 17). The stator 22 has a winding, and a magnetic field is continuously changed by energization. The hoisting machine defines a side on which the sheave 14 is provided as a front surface side, and defines an opposite side to the side on which the sheave 14 is provided as a rear surface side or a back surface side.

The sheave 14 and the brake disc 26 integrally constitute the rotating body module 2. The entire rotor module 2 has a substantially circular disk shape, and an axial center portion (center portion) thereof is supported by the main shaft 19 via a bearing 23, and an outer peripheral edge portion thereof is constituted by a brake disk 26. The rotor 31 of the motor 7 is provided on one side surface (rear surface or rear surface) of the rotor module 2 so as to extend in the axial direction of the main shaft 19. A sheave 14 for hoisting a hoisting rope is fixed to the other side surface (front surface) of the rotor module 2 by a bolt (not shown) or the like.

The rotor 31 of the motor 7 is composed of a cylindrical wall 24 formed integrally with the rotor module 2, and a permanent magnet 25 fixed to the inner circumferential wall surface of the cylindrical wall 24. The rotor 31 is inserted into the housing recess 21 of the housing 1, and the rotor 31 and the magnetic action surface of the stator 22 are opposed to each other in the radial direction with an air gap therebetween.

In the upper part of the housing 1, an electromagnetic brake device 15 is provided. The electromagnetic brake device 15 is disposed symmetrically with respect to a plane 10A passing through the rotation center of the rotor module 2 and parallel to the axial direction of the main shaft 19. That is, 2 electromagnetic braking devices 15 are used in the hoisting machine 10 of the present embodiment. The electromagnetic brake device 15 is configured by a pair of

brake shoes

27a and 27b, an armature 28 that holds one of the brake shoes 27a, a brake main body 33 (see fig. 3) that holds the other brake shoe 27b, and the like, which will be described in detail later. The electromagnetic brake device 15 is mounted on the mounting portion 1a of the housing 1.

Next, the structure of the electromagnetic brake device 15 will be described with reference to fig. 3A, 3B, and 3C. Fig. 3A is an enlarged plan view of a main portion of the electromagnetic brake device 15 shown in fig. 1C as viewed from the direction III. Fig. 3B is a plan view of the electromagnetic brake device 15 shown in fig. 3A as viewed from the IIIB direction. Fig. 3C is a plan view of the electromagnetic brake device 15 shown in fig. 3A as viewed from the IIIC direction.

The 1 electromagnetic brake device 15 is supported by 2 shaft members 5 in a cantilever manner so as to be movable in the axial direction of the support shaft 37, and the shaft members 5 are attached to the housing 1 via the brake holder 50. That is, the shaft member 5 is cantilever-supported by the brake bracket 50 on the housing 1.

More specifically, the stopper body 33 is provided with 2 through holes 33a for inserting the shaft member 5. The shaft member 5 is for movably supporting the electromagnetic brake device 15 on the brake holder 50, and is composed of a round bar-shaped support shaft 37 inserted into the through hole 33a, a disk-shaped flange portion 38 provided on the tip end side (one end side) of the support shaft 37, and a hexagonal portion 45 having a regular hexagonal shape in cross section orthogonal to the axial direction and coaxially provided between the support shaft 37 and the flange portion 38. A screw hole 37a is formed in an end surface of the support shaft 37 on the rear end side (the other end side).

The brake holder 50 is provided with a mounting portion 50a for inserting the rear end portion of the support shaft 37, and the fixing member 39 is integrated with the brake holder 50 by a bolt 51 at the distal end portion of the mounting portion 50 a. The rear end portion of the support shaft 37 is inserted into a mounting hole 50c provided in a mounting portion 50a of the brake bracket 50, and then a fixing bolt (bolt) 46 is mounted in a screw hole 37a of the support shaft 37 via a fixing member 39, whereby the brake bracket 50 and the shaft member 5 are fixed. Here, the insertion amount of the support shaft 37 into the mounting portion 50a is set to a length dimension L50a larger than the shaft diameter dimension D37 of the support shaft 37. In the present embodiment, the length dimension L50a is a length dimension larger than the shaft diameter dimension D37, and is 1/3 or more of the entire length of the support shaft 37.

In addition, in order to increase the insertion length of the support shaft 37 into the mounting portion 50a, the length dimension L50a of the mounting portion 50a in the axial direction of the support shaft 37 is longer than the length dimension L50d in the axial direction of the support shaft 37 at the support portion 50d of the brake bracket 50 that supports the mounting portion 50 a. Thus, the mounting portion 50a forms an insertion portion of the support shaft 37 corresponding to the length L50 a. Further, by increasing the length L50a of the mounting portion 50a, one end portion is positioned on the outer peripheral surface of the brake disk 26, and the other end portion is positioned on the rear surface side of the hoisting machine 10 with respect to the brake shoe 27 b. Therefore, as shown in fig. 4, the line l37 connecting the rear ends of the 2 support shafts 37 provided in the electromagnetic brake device 15 is positioned on the rear surface side of the hoisting machine 10 with respect to the brake shoe 27 b. In the present embodiment, when the brake shoe 27b has moved to the position where the brake disk 26 is clamped, the line l37 is located at substantially the same position as the rear end surface 33b of the brake main body 33 in the direction along the axial direction of the support shaft 37 or is located on the rear surface side of the hoisting machine 10 with respect to the rear end surface 33 b.

This makes it possible to disperse the stress generated inside the support shaft 37 over a wide range in the axial direction of the support shaft 37 when the braking force of the brake is applied. Therefore, the deformation of the support shaft 37 when the braking force of the brake is applied can be sufficiently reduced. In the present embodiment, the support shaft 37 is cut from a hexagonal steel material.

The brake bracket 50 is mounted to the mounting portion 1a of the housing 1 by a bolt 52. The attachment portion 1a is provided on the back surface side (the side opposite to the sheave, i.e., the side opposite to the sheave) of the thickness center portion of the housing 1. This is because the housing 1 is attached to the back side of the housing 1 which is not deformed as much as possible, because the deformation does not affect the operation of the brake when the suspension load is applied and the housing 1 is deformed to fall toward the sheave side.

A stopper bolt (stopper) 35 is fixed to the flange portion 38 to keep the same gap (see fig. 4) between the brake disk 26 and the left and

right brake shoes

27a and 27 b. In order for the stopper bolt 35 to make good contact with a pin 34 (described later) provided so as to project from the armature 28 in the radial direction, it is necessary to adjust the direction of the support shaft 37 in the rotational direction a (see fig. 3C) and adjust the posture of the flange portion 38. Therefore, a hexagonal portion 45 is provided in a part of the support shaft 37, and centering adjustment in the rotational direction can be performed by inserting a wrench or the like into the hexagonal portion 45. The hexagonal portion 45 also serves to prevent the support shaft 37 from idling when the rear end side of the support shaft 37 is fixed to the mounting portion 1a of the housing 1 by the fixing bolt 46 via the fixing member 39. The hexagonal portion 45 provided in the support shaft 37 may have any shape as long as it can be inserted with a wrench or the like, and as long as it has a cross-sectional shape formed by planes orthogonal to at least the axial direction and having 2 surfaces parallel to each other.

Here, the maintenance of the electromagnetic brake device 15 is explained with reference to fig. 6. Fig. 6 is a rear view of the hoist 10 according to the embodiment of the present invention, and is a diagram showing a state at the time of brake maintenance.

in the present embodiment, a projection 50b having a screw hole in a direction perpendicular to the axial direction of the support shaft 37 is formed on the outer peripheral surface of the mounting portion 50a of the brake bracket 50, and a stopper bolt 54 is mounted thereon, the stopper bolt 54 is fixed by a lock nut 53, whereby, when the electromagnetic brake device 15 is opened, the opening amount (opening angle) α is limited by the contact between the brake body 33 and the head of the stopper bolt 54 (see fig. 6). the opening amount α can be finely adjusted by changing the degree of contact by the amount of screwing of the stopper bolt 54. the opening amount α can be determined in consideration of the clearance L (see fig. 6) with the building wall and the maintenance workability of the electromagnetic brake device 15, but is preferably 10 to 30 °.

In this way, in the present embodiment, the electromagnetic brake device 15 is supported by 2 shaft members 5 in an axially movable cantilever manner, and the shaft members 5 are mounted on the housing 1 via the brake bracket 50. Therefore, as in the conventional art, a large support bracket or the like surrounding both ends of the support shaft of the electromagnetic brake device 15 is not required, and the electromagnetic brake device 15 and the hoisting machine 10 can be reduced in size and weight.

Next, the operation of the electromagnetic brake device 15 will be described with reference to fig. 4 and 5. Fig. 4 is a diagram showing a state of the electromagnetic brake device 15 shown in fig. 3A when the brake is applied. Fig. 5 is a diagram showing a state in which the brake of the electromagnetic brake device 15 shown in fig. 3A is open.

The electromagnetic brake device 15 in the present embodiment has a feature in the structure in which it is mounted on the housing 1 with the shaft member 5 as described above. A known structure can be used for the internal structure other than this structure.

An outline of the internal structure will be described. The electromagnetic brake device 15 includes: a pair of

brake shoes

27a, 27b for pressing the outer peripheral side of the brake disk 26 to brake against the brake disk 26; an armature 28 for holding one of the brake shoes 27 a; a brake spring 36 for urging the armature 28 toward the brake disc 26 (in the direction C in fig. 4) in order to apply a braking force to the sheave 14; and an electromagnetic driving unit 29 for compressing the brake spring 36 to open the

brake shoes

27a and 27b from the outer peripheral side surface of the brake disc 26 and to rotate the sheave 14.

The electromagnetic drive unit 29 is directly fixed to the brake main body 33 or indirectly fixed thereto via another mounting member using a fixing bolt not shown. In the present embodiment, the electromagnetic drive unit 29 is coupled to the brake main body 33 by the coupling shaft 55, and the relative position of the electromagnetic drive unit 29 and the brake main body 33 is fixed. The other brake shoe 27b is directly fixed to the brake main body 33 or indirectly fixed thereto via another mounting member, and brakes or opens the other outer peripheral side surface of the brake disk 26.

The electromagnetic brake device 15 is configured to obtain a high braking force by sandwiching the brake disk 26 from both sides with the brake shoe 27a held by the armature 28 and the brake shoe 27b fixed to the brake main body 33.

The electromagnetic drive unit 29 functions as an electromagnet for electromagnetically attracting the armature 28, and is formed of a combination of an electromagnetic coil and an iron core, not shown. The iron core is made of a material having a high magnetic permeability. The brake spring 36 presses the 1 st assembly 43 (diagonally right) of the armature 28 and the brake shoe 27a provided in the electromagnetic brake device 15 toward the brake disk 26 (in the direction C in the drawing). As a result, in a state where the electromagnetic coil of the electromagnetic drive unit 29 is not energized, the brake shoe 27a strongly presses one outer peripheral side surface (right side surface in the drawing) of the brake disk 26. At this time, the brake spring 36 is not yet fully extended, and a spring force remains.

Therefore, the 2 nd assembly 44 (diagonally upward right) of the brake main body 33, the electromagnetic driving unit 29, and the brake shoe 27b moves in the opposite direction (direction D in the drawing) due to the reaction force. As a result, the other brake shoe 27b provided on the brake main body 33 strongly presses the other outer peripheral side surface (left side surface in the drawing) of the brake disc 26. Thus, the electromagnetic brake device 15 has a function of holding the brake disc 26 between the

brake shoes

27a and 27b from both sides to maintain the sheave 14 in a braking state.

On the other hand, when a current flows through the electromagnetic coil of the electromagnetic drive unit 29, the iron core is excited, and the armature 28 is attracted by the electromagnetic drive unit 29. As a result, as shown in fig. 5, the armature 28 drives the brake shoe 27a in a direction (specific direction, D direction in the drawing) away from the brake disk 26 against the spring force of the brake spring 36. That is, the 1 st assembly 43 moves in the direction D in the figure. Then, the braking force on one of the brake disks 26 is released.

The armature 28 moves in the direction D in the figure until the pin 34 contacts the stop bolt 35 fixed to the flange portion 38 of the support shaft 37. At the point in time when the pin 34 of the armature 28 contacts the stopper bolt 35, the armature 28 and the electromagnetic drive unit 29 are not yet in contact with each other. Therefore, the 2 nd assembly 44 moves in the opposite direction (the C direction in the drawing) toward the armature 28 whose movement in the D direction in the drawing is restricted. Thereby, the other brake shoe 27b provided on the brake main body 33 is driven in a direction away from the brake disk 26, and the other braking force with respect to the brake disk 26 is released.

Since these operations are performed quickly, there is a possibility that a gap is generated between the pin 34 and the stopper bolt 35 due to a reaction when the pin 34 collides with the stopper bolt 35. That is, when the electromagnetic drive unit 29 and the armature 28 are in close contact with each other with a gap being formed between the pin 34 and the stopper bolt 35, the 1 st assembly 43 and the 2 nd assembly 44 are stationary while moving to the left as a whole. In this case, the brake disk 26 and the brake shoe 27a may also come into contact after the braking force is released. Then, the 1 st assembly 43 and the 2 nd assembly 44 are pulled in the direction D (right direction) in fig. 5 by the floating device 42 composed of a spring or the like, whereby the pin 34 and the stopper bolt 35 are always brought into close contact in the braking force release. The projection of the stopper bolt 35 is adjusted so that the gap X1 between the brake disk 26 and the brake shoe 27a and the gap X2 between the brake disk 26 and the brake shoe 27b are equal.

On the other hand, when the energization of the electromagnetic coil of the electromagnetic driving unit 29 is interrupted, the electromagnetic driving unit 29 is demagnetized, and thus the pair of

brake shoes

27a and 27b press the outer peripheral side of the brake disc 26 to apply braking to the sheave 14 as described above.

As described above, according to the present embodiment, the electromagnetic brake device 15 is cantilever-supported movably in the axial direction by 2 shaft members 5. The shaft member 5 is mounted on the housing 1 via a brake bracket 50, and a flange portion 38 on which a stopper bolt 35 for appropriately maintaining a gap between the brake disk 26 and the

brake shoes

27a, 27b and the floating device 42 are mounted is formed on the shaft member 5. With this configuration, a conventional large-scale support bracket is not required, and the mounting structure for mounting the electromagnetic brake device 15 to the housing 1 can be simplified. Therefore, in the present embodiment, the weight of the entire hoisting machine 10 can be reduced, and the size of the entire hoisting machine 10 can be reduced.

As compared with fig. 8A, 8B, 8C, and 9, in the conventional hoisting machine 100, in order to attach the electromagnetic brake device 115 to the casing 1, it is necessary to support the electromagnetic brake device 15 by the support shaft 137, and to fix the electromagnetic brake device to the casing 1 via the strong support brackets 47 supported so as to surround both ends of the support shaft 137. In contrast, in the hoist 10 of the present embodiment, the electromagnetic brake device 15 is supported by 2 shaft members 5 so as to be movable in the axial direction, and the shaft members 5 are fixed to the mounting portion 1a of the housing 1 via the brake bracket 50, so that the hoist 10 can be reduced in size and weight.

Further, since the support shaft 37 is integrated with the flange portion 38, a new component for appropriately holding the mounting position of the electromagnetic brake device 15 is not required, and the number of components can be reduced. Further, since the electromagnetic brake device 15 is also lightweight, it is possible to improve the workability of the maintenance worker when removing the electromagnetic brake device 15 from the hoisting machine 10 at the time of replacement of the

brake shoes

27a and 27b or at the time of periodic inspection.

The present invention is not limited to the above embodiment, and includes various modifications. For example, the above embodiments are described in detail to explain the present invention easily and understandably, and are not limited to having all the configurations described. In addition, other configurations can be added, deleted, and replaced for a part of the configurations of the embodiments.

The hoisting machine of the present invention can be used in any of a machine room-less elevator apparatus and a machine room-type elevator apparatus. The electromagnetic brake device 15 is fixed to the housing 1 by using 2

shaft members

5 and 1 brake holder 50, but the number of the shaft members 5 and the brake holders 50 is not limited thereto.

Description of the symbols

1 casing

1a … … mounting part

5 … axle component

10 … traction machine

14 … rope pulley

15 … electromagnetic brake device

26 … brake disc

27a, 27b … … brake shoes (brake shoe)

28 … armature

33 … brake main body (Main body)

35 … stop bolt (stop piece)

37 … supporting axle

37a … … threaded hole

38 … flange portion

39 … fixing part

42 … floating device

45 … hexagonal part

46 … fixing bolt (bolt)

50 … brake bracket

51 … fixing part fixing bolt

53 … lock nut

54 … stop the bolt.

Claims

1. A traction machine for an elevator, comprising: a housing; a sheave rotatably mounted to the housing for winding a rope; a brake disc that is provided integrally with the sheave and rotates; and an electromagnetic brake device that brakes the brake disc, wherein the elevator hoisting machine is characterized in that:

the electromagnetic braking device includes:

a pair of brake shoes for braking the brake disc;

an armature holding one of the pair of brake shoes;

a main body that holds the other of the pair of brake shoes;

a stopper for restricting movement of the armature in a specific direction away from the brake disk; and

a floating device for applying force to the main body in the specific direction, and

the electromagnetic brake device is supported by a cantilever via at least 2 shaft members movably in an axial direction, the shaft members being mounted to the housing via a brake bracket,

the shaft member includes:

a support shaft that is inserted into the electromagnetic brake device and supports the electromagnetic brake device so as to be movable in an axial direction; and

a flange portion provided on one end side of the support shaft,

the stopper and the floating device are mounted to the flange portion,

the brake holder is provided with a mounting portion for inserting the other end portion of the support shaft,

the length of inserting the support shaft into the mounting portion is longer than the shaft diameter of the support shaft,

a screw hole is formed in an outer peripheral surface of the mounting portion in a direction perpendicular to an axial direction of the support shaft,

the bolt is fixed in the threaded hole by a nut,

when the brake is opened during maintenance of the electromagnetic brake device, the head of the bolt contacts the main body of the electromagnetic brake device, so that the opening amount of the brake is limited.

2. The traction machine for an elevator according to claim 1, wherein:

the length of inserting the support shaft into the mounting portion is 1/3 or more of the entire length of the support shaft.

3. The traction machine for an elevator according to claim 1, wherein:

the shaft member includes a hexagonal portion that is provided coaxially at a position between the support shaft and the flange portion, and has a hexagonal cross-sectional shape sectioned by a plane orthogonal to an axial direction of the support shaft.

4. The traction machine for an elevator according to any one of claims 1 to 3, wherein:

a threaded hole is formed in an end surface of the other end side of the support shaft in the axial direction,

a fixing member is integrated with the brake bracket by a bolt at an innermost end of the mounting portion,

the support shaft is fixed to the fixing member integrated with the brake bracket by mounting a bolt in the threaded hole of the support shaft,

the brake bracket is fixed to the housing with bolts.

5. The traction machine for an elevator according to any one of claims 1 to 3, wherein:

the brake bracket is fixed to the housing at a center portion of a thickness of the housing in a direction along a rotation axis of the sheave, the center portion being opposite to a side where the sheave is provided.

6. An elevator apparatus, comprising: a car; a rope connected to the car; and a hoisting machine that has a sheave around which the rope is wound, and that moves the car up and down by rotating the sheave and operating the rope, wherein the elevator apparatus is characterized in that:

the hoisting machine for an elevator according to any one of claims 1 to 3 is included as the hoisting machine.