KR940004774Y1 - Elevator driver braker - Google Patents

Abstract

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Description

Brake Device of Elevator Hoist

1 is a longitudinal sectional view schematically showing a brake device of an elevator hoist according to an embodiment of the present invention.

2 is a side view as seen from the left side of FIG.

3 is a schematic view of essential parts of an example of a hoisting apparatus of a conventional example.

* Explanation of symbols for main parts of the drawings

5: hoisting device 6: gear case

7: electric motor 8: gear mechanism

9 pulley 20 support

22: rotating shaft of the motor 24: the hive

26: bearing 28: stator core

30 frame 32 side plate

32a: round through hole 32b: through hole

34: fixing bolt 36: rotor core

38a, 38b: brake shoe 40: fixed pin

42: coil spring 44: solenoid

48: brake handle 48a: handle

48b: lever 50: protrusion

The present invention relates to a brake device of an elevator hoisting machine that raises and lowers a lifting cage and a balancer via a governor rope. In particular, the brake handle is mounted on the brake arm so that the elevator hoisting machine can be easily turned in case of power failure or maintenance. It relates to a brake device of one elevator hoisting machine.

The brake apparatus of the conventional elevator hoisting machine was of the structure shown in FIG. In Fig. 3, reference numeral 5 denotes a hoisting apparatus, which comprises a gear case 6, an electric motor 7 for supplying power to the gear case 6, and a motor from the electric motor 7. The gear mechanism 8 which transmits while decelerating the power of this, and the pulley 9 which rotates by the power from this gear mechanism 8 are provided, and the elevator elevator cage and balancer which are not shown in figure are moved up and down.

The electric motor 7 is supported by the main body 7b attached to one side of the gear case 6 via a connecting member 7a, and is supported by the main body 7b to penetrate the gear case 6. A plurality of bearings 7d disposed between the input side 7c disposed on the rotational material, the bearing supporting portion of the gear case 6 on the input side 7c to smoothly rotate the input shaft 7c, and the gear case ( And a brake device 7e mounted on the input shaft end portion protruding from 6).

On the other hand, the gear mechanism 8 is a rotation shaft which is rotatably supported via the first gear 8a inserted into the input side 7c described above and a plurality of bearings 8b in the center of the gear case 6. 8c, a second gear 8d fitted to the rotary shaft 8c, a third gear 8e attached to the rotary shaft 8c and engaged with the first gear 8a, and a gear case. An output shaft 8g rotatably supported via the plurality of bearings 8f at the other end of the sixth end, and a fourth gear fitted to the output shaft 8g and engaged with the second gear 8d. It consists of the gear 8h.

The pulley 9 is disposed at the distal end of the output side 8g protruding from the gear case 6, and a plurality of pulley grooves 9a are formed on the peripheral surface thereof.

By the way, when the hoisting apparatus 5 is to be miniaturized, it is necessary to increase the rotational speed of the electric motor 7 to increase the reduction ratio, so the number of reduction stages must be increased.

As the number of reduction stages increases, the number of shafts in the gear case 6 increases, and the shafts and shafts approach each other. However, a problem arises in that the use of the fastening bolt 6a is difficult.

That is, the fastening bolt 6a includes an important function of constituting the gear case by combining the upper case and the lower case, but the load of the lifting cage and balancer, not shown, is not shown on the output shaft 8a having the pulley 9. When acting, since it receives the total load, it is necessary to configure it to have sufficient strength like the gear case 6. Therefore, when the above-mentioned shafts and shafts are close to each other, the internal space is narrow, so that a large diameter can not be used, so that it cannot be miniaturized, and the brake handle 7e is not attached to the brake device 7e in case of power failure or There existed various problems, such as an elevator hoisting machine not being easy to be lined up at the time of maintenance.

The present invention has been made in view of the above-mentioned problems, and the purpose of the present invention is to reduce the elevator hoisting machine and at the same time provide an elevator hoist brake device that can easily rotate the elevator hoisting machine at the time of power failure or maintenance. To provide.

In order to achieve the above object, the brake device of an elevator hoist according to the present invention includes a rotating shaft of an electric motor rotatably disposed on a support, a stator iron core fixed to one side of a longitudinal direction of the rotating shaft, and generating magnetic force, and the stator iron core. A rotor frame core disposed to be rotated by a magnetic force generated from the stator core core and disposed on the outside of the rotor core, and a cylindrical frame mounted on the outside of the rotor core core to be rotated according to the rotational force of the rotor core core; A sheave fixed to one of the openings of the frame by a fixing bolt and rotated to move the elevator cage and the balancer up and down through a rope wound around the periphery according to the rotation of the frame; Coil soup which is inserted and always works outward on both ends It is fitted is installed, the lower end is a pair of brake shoes to prevent the rotation of the shove when the shaft is in a state coupled to the support object by the fixing pin, one end is coupled by the shaft to the upper one side of the brake shoe On the other side, the handle portion is formed, characterized in that consisting of the brake handle for turning the hoist by releasing the operation of the brake shoe during maintenance or power failure.

Hereinafter, a brake device of an elevator hoist according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a longitudinal cross-sectional view schematically showing a brake device of an elevator hoist according to an embodiment of the present invention, Figure 2 is a side cross-sectional view seen from the left. In FIG. 1 and FIG. 2, reference numeral 20 denotes a support table disposed in the machine room and disposed on both sides of the hoisting machine, and reference numeral 22 denotes a rotary shaft of the electric motor, in which both ends are horizontally supported by the support table 20 and disposed. (24) is a sheave rotatably mounted via a plurality of bearings (26) on one side in the longitudinal direction of the rotary shaft (22), and (28) is adjacent to the sheave (24) As a stator iron core fixed coaxially around the rotary shaft 22 of the rotor, the stator core 28 generates magnetic force to generate a rotational force of the electric motor.

30 is a frame of a steel plate having openings on both sides, and forms a cylindrical body, and the right opening of the frame 30 is equipped with a side plate 32 surrounding the stator core 28 and a rotor core described later. The left opening portion is coupled to the flange portion integrally formed in the sheave 24 and the flange protruding outward from the left opening portion of the frame 30 by a fixing bolt 34. In addition, a circular through-hole 32a through which the rotating shaft 22 of the electric motor penetrates is formed near the center of the side plate 32 so as not to interfere with the rotation of the rotating shaft 22 of the electric motor. 32, vent holes 32b are formed so as to dissipate heat generated by the stator core 28 and the rotor magnet core described later away from each other on a circumferential line with respect to the center thereof.

Reference numeral 36 is a rotor magnet core attached to the inside of the frame 30 so as to face the stator core 28 and rotated by a magnetic force generated from the stator core 28.

Further, on the left side of the sheave 24, brake shoes 38a and 38b, which are rotatably fitted to the rotary shaft 22 of the electric motor, are formed on the support 20, as shown in detail in FIG. And axial coupling of the brake shoes 38a and 38b, respectively, and the tip ends of the brake shoes 38a and 38b to stop the operation of the hoist while the lifting cage of the elevator is inactive. The coil spring 42 is disposed to push outwardly, and near the middle of the brake shoes 38a and 38b, power is applied by an operation signal of the elevator lift cage to counter the bias force of the coil spring 42. Solenoids 44 which act to approach the tip ends of the brake shoes 38a and 38b to operate the hoisting machine are disposed. In addition, a brake handle 48 having integrally a handle portion 48a and a lever 48b is mounted on the shaft 46 near the upper portion of the one side brake shoe 38a to operate the hoisting machine at the time of power failure or maintenance. It is. In FIG. 2, 50 is a protrusion protruding from the other brake shoe 38b, and the handle 48a of the brake handle 48 is required when the mechanic wants to manually operate the hoisting machine at the time of power failure or maintenance. Holding down and pushing down to the lower portion, the lever 48a of the brake handle 48 is pushed downward toward the center of the coil spring 42 as the lever 50a is pushed downward, thereby leading to the end portions of the brake shoes 38a and 38b. Is rotated inward with respect to the fixing pin 40, and as a result, the brake shoes 38a and 38b, which have been in contact with the inner circumference of the sheave 24, fall out of the contact state, and release the brake of the hoisting machine. It becomes the state which can operate a hoist.

In the hoist of the elevator configured as described above, the brake device includes a rotating shaft 22, a stator core 28, a rotor core 36, and a frame accommodating the rotor shaft 22 of the electric motor in which the mover 24 constitutes conduction. Since the sheave 24 is not disposed on the outer circumference of the 30, the sheave 24 is rotatably disposed by the plurality of bearings 26 on the left side in the longitudinal direction of the shaft 22 of the electric motor. , The load of the lifting cage by the rope of the unshown sheave 24 (the total load when the passenger boards or loads are loaded in the lifting cage) is not caught by the frame 30 and the rotor core 36. It is supported by the rotary shaft 22 of the motor via the sheave 24. Therefore, the rigidity of the frame 30 is at least reduced, which makes it possible to reduce the weight of the hoisting machine. Further, the diameter of the sheave 24 can be selected irrespective of the iron core dimensions such as the rotor core 35, which is electrically required, and the hoist can be miniaturized without increasing the load torque more than necessary.

In addition, since the load by the sheave rope (not shown) does not act on the rotor core 36, the supply change with the stator core 28 is less affected, so that the motor characteristics are stabilized and the elevator having good riding comfort can be obtained. You can get it. Moreover, since the narrow width | variety 24 is rotatably supported by the rotating shaft 22 of an electric motor by the some bearing 26, the center of the rotating shaft 22 of an electric motor with high precision with respect to the support stand 20 is carried out. Since it is not necessary to adjust and fix it, the hoist which can be attached easily can be obtained.

Further, the brake shoes 38a and 38b are disposed on the left side of the brake 24 on the rotary shaft 22 of the motor so as to be rotatable by the fixing pins 40, and at the same time, the blackout of the brake shoes 38a is near the upper portion of the brake shoes 38a. Since the brake handle 48 having the handle portion 48a and the lever 48b integrally mounted on the shaft 46 can operate the hoisting machine at the time of maintenance or maintenance, If the operator wants to operate it manually, the mechanic grasps the handle 48a of the brake handle 48 and pushes it downward. The brake handle 48 descends about the shaft 46 and the lever of the brake handle 48. 48a pushes the protrusion 50 projecting perpendicularly to the brake shoe 38b downward to approach the tip ends of the brake shoes 38a and 38b against the opposing force of the coil spring 42, Hoist by releasing brake By manually rotate and move the floor that requires the elevator lift cage at the time of maintenance or a power failure, it is possible also to do this, servicing the elevator traction machine.

On the other hand, in order to operate the hoist of an elevator, when a passenger presses a floor to go to a control panel in an elevator (not shown), power is supplied to the solenoid 44, which is biased by the coil spring 42 to operate the brake shoe ( The brake states of 38a and 38b are released, and power is applied to the stator core 28 to generate magnetic force from the stator core 28. At this time, by rotating the rotor core 36 by the magnetic force, the rotor core 36 starts to rotate, the frame 30 is rotated in accordance with the rotation of the rotor core 36, the frame 30 The movable cage 24 and the balancer of the elevator are rotated in opposite directions while the movable shaft 24 fixed by the fixing bolt 34 is rotated at one side of the opening.

In addition, when the passenger arrives at the desired floor, the application of power to the solenoid 44 is cut off, and the brake shoes 38a and 38b are pushed outward from each other by the force of the coil spring 42. The brakes of 38a and 38b are maintained to stop the lifting cage of the elevator.

As described above, the sheave is rotatably disposed on the rotating shaft of the motor adjacent to the stator core fixed to the rotating shaft of the motor, and the rotor iron core is attached to the frame disposed on the side of the shaft by the rotor. The load is supported by the rotating shaft of the motor so as not to affect the rotor core. Therefore, the diameter of the sheave can be selected irrespective of the size of the stator core, so that the frame can be reduced in weight and size, and the pore change of the stator core and the rotor core is small, so that the characteristics of the motor are stable and the comfort of the elevator is improved. It is stable and the center of rotation shaft of the motor is not precisely required, so it is easy to manufacture and attach, and the brake handle is attached to the brake shoe so that the brake handle can be operated during maintenance or power failure. It is a very practical design that can operate an elevator lift cage.

Claims (3)

The rotary shaft 22 of the electric motor rotatably disposed on the support 20, the stator core 28 fixed to one side in the longitudinal direction of the rotary shaft 22 to generate magnetic force, and the stator core 28 The rotor magnet core 36 disposed on the outside and disposed so as to be rotated by the magnetic force generated from the stator core core 28 and the rotor magnet core 36 mounted on the outer side of the rotor magnetic core 36 to the rotational force of the rotor magnetic core 36. And a lifting cage having a cylindrical frame (30) arranged to rotate along, a rope fixed to one side opening of the frame (30) by a fixing bolt (34) and wound around an outer circumference according to the rotation of the frame (30). Sheave 24 is rotated to move the balancer up and down, and the coil spring 42 is fitted to the rotary shaft 22 on the inner circumferential coast side of one side of the sheave 24, and always acts outwardly on both sides of the tip. Is installed, the bottom is supported Brake shoes (38a, 38b) to prevent the rotation of the sieve 24 when inactive in the state coupled to the side by the fixing pin (40) on one side, one end of the upper brake shoes 38a The brake handle 48 coupled to the shaft 46 and on the opposite side is provided with a handle 48a to release the brake operation state of the brake shoes 38a and 38b during maintenance or power failure, thereby turning the hoisting machine. Brake device of the elevator hoisting machine, characterized in that consisting of. According to claim 1, wherein the frame 30 has a side plate 32 is disposed on one side of the opening, the rotation of the motor so as not to interfere with the rotation of the rotary shaft 22 of the electric motor near the central portion of the side plate 32 as a whole. A circular through hole 32a through which the shaft 22 penetrates is formed, and at the same time, the heat generated by the stator core 28 and the rotor core 36 away from each other on a circumferential line with respect to the center thereof to the outside. The ventilation device of the elevator hoisting machine, characterized in that the vent hole (32b) is formed so as to be discharged. 2. The brake handle (48) according to claim 1, wherein the brake handle (48) pushes the protrusion (50) disposed on the opposite brake shoe (38b) to the auxiliary force of the coil spring (42) disposed on the front end portions of the brake shoes (38a, 38b). The brake device of an elevator hoisting machine, characterized in that the lever (48b) is integrally formed to release the brake state.