JP5508932B2 - Elevator hoisting machine - Google Patents

Description

  The present invention relates to an elevator hoisting machine that takes measures against outflow of oil and fat from a bearing portion.

  As an elevator hoist, an outer rotor type structure in which a rotor sheave is disposed on the outer peripheral side of a stator having an armature fixed to a shaft is known. A cylindrical sheave is provided with a brake disk (hereinafter referred to as “disk”), and is rotatably supported on a shaft via bearings by support rings at both ends (see Patent Document 1).

  The bearing housing that houses the bearing retains a lubricant, but when the temperature of the lubricant rises during operation, oil flows out from the lubricant and travels into the bearing to lubricate the inner roller of the bearing. Is done. However, in the bearing box as described above, it is necessary to prevent oil from flowing out of the bearing box. For example, the following shaft seal structure has been proposed.

  FIG. 19 is a cross-sectional view in the rotational axis direction showing an example of a shaft seal structure of a conventional elevator hoist.

  An armature 7 is attached to a shaft 6 fixed at both ends to a pair of stands 5 to constitute a stator. The rotor includes a sheave 1, a disk 12, a bearing box 2, and an end lid 3, and is rotatably supported on the shaft 6 via a bearing 8. A disk 12 is fixed to the outer peripheral side at one end of the cylindrical sheave 1, and a pair of annular bearing boxes 2 that store bearings 8 are attached to the inner peripheral sides of both ends of the sheave 1. A pair of annular end lids 3 are interposed between the two. An outer ring 8 a of the bearing 8 is fitted to the bearing box 2, and an inner ring 8 b of the bearing 8 is fitted to the shaft 6. A space is formed by the cylindrical sheave 1 and the bearing boxes 2 at both ends, and a plurality of through holes 9 that ventilate the outer side 10 and the inner side 11 when the sheave 1 rotates on the outer peripheral side of the bearing box 2. Is formed.

  The space in which the bearing 8 is installed is filled with a lubricant. The periphery of the bearing has a first seal portion 4a on the inner periphery of the bearing housing 2 and a second seal portion 4b on the inner periphery of the end cover 3, and a groove is provided to prevent oil and grease from flowing out from the rotating portion and to prevent foreign matter from entering. A shaft seal structure in which a sealing material such as felt is interposed. In addition to this, a groove for storing the oil and fat content of the lubricant is provided, and a labyrinth structure is provided in the first and second seal portions 4a and 4b to enhance the sealing performance. However, if the oil content in the shaft seal structure is extremely abnormal, such as abnormal use represented by excessive lubrication to the bearing 8 or accumulation of oil over time due to no inspection, There was a concern that it would flow out of the two seal portions 4a and 4b.

  As shown by the one-dot chain line, there are the following two outflow paths.

<Path A> ... Oil outflow path in which the lubricant of the bearing is generated from the bearing box side Bearing 8 → Passes the first seal portion 4a → Bearing box machine inner outer surface → Through hole 9 (Inuki hole) → Shallow inner circumference Part → disk braking surface <path B>... Oil outflow path where the lubricant of the bearing is generated from the end lid side bearing 8 → passes through the second seal 4b → inner sheave of the sheave → disk braking surface

JP 2001-19322 A

  In the elevator hoist described above, when the oil component of the lubricant flows out in the direction of the disk, the oil component adheres to the braking surface of the brake system, causing the following problems.

(1) Decrease in brake braking force due to oil and fat adhering to the braking surface The braking force of the brake, that is, the brake torque is expressed by the following equation.

Brake torque: TB = 2 × μ × F × r × Np (1)
Here, μ: friction coefficient, F: pressing force, r: braking radius, Np: number of pads If oil or grease adheres to the braking surface of the disk, the friction coefficient with the pad decreases, and the brake torque decreases. As a result, there was a possibility of affecting the operation of the elevator.

(2) Maintenance management concerning prevention of oil / fat adhesion In order to prevent oil / fat from adhering to the braking surface, maintenance management is important in the operation of the equipment. If there are few oil prevention measures between the oil generation site and the braking surface, the time to reach the braking surface will be shortened, and the maintenance interval must be shortened.

(3) Enlargement and complexity of the shaft seal structure associated with bearing oil-proofing measures To prevent oil leakage from the bearings, measures are taken at the seals. It is common to increase the distance of the oil path by increasing the number of sealing materials such as felt, installing oil seals, and labyrinth.

  However, when the seal material is increased and disposed in the seal portion, the corresponding dimensions are required, so that the bearing box and the end lid become larger, and as a result, the whole hoisting machine becomes larger. . In addition, if a labyrinth structure is installed in the seal part, it will also contribute to the increase in the size of the hoist due to the increase in dimensions. Improvements in lead time and processing accuracy are required, leading to reduced productivity and increased manufacturing costs.

  The object of the present invention is to solve the above-mentioned problems, and to take oil-proof measures other than the seal part on the path through which the oil and fat flows out from the bearing part, and to increase the safety against the oil outflow. Then, it is providing the hoisting machine for elevators which can maintain the operation | movement of an elevator normally.

  In order to solve the above problems, an elevator hoisting machine according to the present invention includes a stator having a shaft with both ends attached to a pair of stands, and a rotor supported by a bearing with respect to the stator, A cylindrical sheave, a brake disk fixed to the outer peripheral side of one end of the sheave, a pair of annular bearing boxes that are attached to the inner peripheral side of both ends of the sheave, and store the bearing; A plurality of through holes that have a pair of annular end covers interposed between the stand and the bearing box, and vent the outside and inside of the space formed by the sheave and the bearing box in the bearing box. In an elevator hoisting machine in which a hole is provided and a first seal portion for the shaft is formed inside the bearing box and a second seal portion for the stand is formed outside the end lid, the brake disk is One end of the sheave fixed To definitive the bearing housing, the inboard side of the inner circumferential side of the through hole, characterized by comprising the oil-proof structure having the projections in the entire circumferential direction.

  The elevator hoisting machine of the present invention includes a stator having shafts whose ends are attached to a pair of stands, and a rotor supported by a bearing with respect to the stator, and the rotor is a cylindrical rope. A pair of annular bearing boxes which are mounted on the inner peripheral sides of both ends of the sheave and store the bearings; the stand and the bearing; A pair of annular end covers interposed between the box and a plurality of through holes for venting the outside and inside the space formed by the sheave and the bearing box in the bearing box, In the elevator hoisting machine in which a first seal portion for the shaft is formed inside the bearing box and a second seal portion for the stand is formed outside the end lid, the rope to which the brake disk is fixed The bearing box at one end of the car Contrast, the outboard of the outer peripheral side of the through hole, characterized by comprising the oil-proof structure having inclined protruding inwardly projections throughout the circumferential direction.

  The elevator hoisting machine of the present invention includes a stator having shafts whose ends are attached to a pair of stands, and a rotor supported by a bearing with respect to the stator, and the rotor is a cylindrical rope. A pair of annular bearing boxes which are mounted on the inner peripheral sides of both ends of the sheave and store the bearings; the stand and the bearing; A pair of annular end covers interposed between the box and a plurality of through holes for venting the outside and inside the space formed by the sheave and the bearing box in the bearing box, In the elevator hoisting machine in which a first seal portion for the shaft is formed inside the bearing box and a second seal portion for the stand is formed outside the end lid, the rope to which the brake disk is fixed The bearing box at one end of the car Hand, characterized by comprising the oil-proof structure is inclined outwardly to the inboard side of the through hole from the outboard side.

  The elevator hoisting machine of the present invention includes a stator having shafts whose ends are attached to a pair of stands, and a rotor supported by a bearing with respect to the stator, and the rotor is a cylindrical rope. A pair of annular bearing boxes which are mounted on the inner peripheral sides of both ends of the sheave and store the bearings; the stand and the bearing; A pair of annular end covers interposed between the box and a plurality of through holes for venting the outside and inside the space formed by the sheave and the bearing box in the bearing box, In the elevator hoisting machine in which a first seal portion for the shaft is formed inside the bearing box and a second seal portion for the stand is formed outside the end lid, the rope to which the brake disk is fixed To one end of the car, on the outside, Characterized by comprising the oil-proof structure formed with an inner peripheral surface inclined outwardly to the inner peripheral surface or the inboard direction of the surface recess.

  The elevator hoisting machine of the present invention includes a stator having shafts whose ends are attached to a pair of stands, and a rotor supported by a bearing with respect to the stator, and the rotor is a cylindrical rope. A pair of annular bearing boxes which are mounted on the inner peripheral sides of both ends of the sheave and store the bearings; the stand and the bearing; A pair of annular end covers interposed between the box and a plurality of through holes for venting the outside and inside the space formed by the sheave and the bearing box in the bearing box, In the elevator hoisting machine in which a first seal portion for the shaft is formed inside the bearing box and a second seal portion for the stand is formed outside the end lid, the rope to which the brake disk is fixed Inside the outside of the aircraft against one end of the car Characterized by comprising the oil-proof structure fitted with a ring section.

  The elevator hoisting machine of the present invention includes a stator having shafts whose ends are attached to a pair of stands, and a rotor supported by a bearing with respect to the stator, and the rotor is a cylindrical rope. A pair of annular bearing boxes which are mounted on the inner peripheral sides of both ends of the sheave and store the bearings; the stand and the bearing; A pair of annular end covers interposed between the box and a plurality of through holes for venting the outside and inside the space formed by the sheave and the bearing box in the bearing box, In the elevator hoisting machine in which a first seal portion for the shaft is formed inside the bearing box and a second seal portion for the stand is formed outside the end lid, the rope to which the brake disk is fixed On the end lid at one end of the car And, characterized by comprising the oil-proof structure fitted with a L-shaped cross section of the cover so as to cover the second sealing portion.

  The elevator hoisting machine of the present invention includes a stator having shafts whose ends are attached to a pair of stands, and a rotor supported by a bearing with respect to the stator, and the rotor is a cylindrical rope. A pair of annular bearing boxes which are mounted on the inner peripheral sides of both ends of the sheave and store the bearings; the stand and the bearing; A pair of annular end covers interposed between the box and a plurality of through holes for venting the outside and inside the space formed by the sheave and the bearing box in the bearing box, In the elevator hoisting machine in which a first seal portion for the shaft is formed inside the bearing box and a second seal portion for the stand is formed outside the end lid, the rope to which the brake disk is fixed The stun at one end of the car Hand, characterized by comprising the oil-proof structure formed with an L-shaped portion to cover the second sealing portion.

  In accordance with the present invention, by providing oil prevention measures other than the seal portion between the bearing of the oil generation site and the braking surface of the disk, and by strengthening the prevention of oil adhesion to the disk braking surface, the braking force of the brake is reduced. Can be prevented. Further, not only does the oil and fat not adhere to the braking surface, but also the time for reaching the braking surface becomes extremely long even in the event of an abnormality, and the maintenance interval does not have to be shortened.

  Further, it is possible to avoid an increase in felt and a labyrinth structure in the seal portion, and it is possible to improve productivity and reduce manufacturing costs by shortening lead times for manufacturing parts and reducing processing accuracy.

  Therefore, not only the safety against oil spills is enhanced, but also the operation of the elevator can be maintained normally after improving the performance in many aspects such as manufacturability and maintainability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an essential part cross-sectional view of an elevator hoist according to Example 1 of Embodiment 1 of the present invention. The enlarged view of the protrusion which concerns on the modification of the Example 1. FIG. Sectional drawing of the principal part of the elevator hoist according to the second embodiment. Sectional drawing of the principal part of the elevator hoist according to the third embodiment. Sectional drawing of the principal part of the elevator hoisting machine which concerns on Embodiment 2 of this invention. The enlarged view of the protrusion concerning the modification of Embodiment 2. FIG. Sectional drawing of the principal part of the elevator hoisting machine which concerns on Embodiment 3 of this invention. Sectional drawing of the principal part of the elevator hoisting machine which concerns on Example 1 of Embodiment 4 of this invention. Sectional drawing of the principal part of the elevator hoist according to the second embodiment. Sectional drawing of the principal part of the hoisting machine for elevators which concerns on Example 1 of Embodiment 5 of this invention. Sectional drawing of the principal part of the elevator hoist according to the second embodiment. The enlarged view of the ring which concerns on the modification of the Example 2. FIG. Sectional drawing of the principal part of the hoisting machine for elevators concerning Embodiment 6 of this invention. Sectional drawing of the principal part of the elevator hoisting machine which concerns on Embodiment 7 of this invention. The enlarged view of the cross-section L-shaped part which concerns on the modification of Embodiment 7. FIG. The principal part enlarged view of the winding machine for elevators which implemented Example 1 and Embodiment 3 of Embodiment 1 of this invention simultaneously. The principal part enlarged view of the winding machine for elevators which implemented Example 1, Embodiment 2, and Embodiment 3 of Embodiment 1 of this invention simultaneously. The principal part enlarged view of the winding machine for elevators which implemented Example 1, Embodiment 2, Embodiment 3, and Example 2 of Embodiment 4 of Embodiment 1 of this invention simultaneously. Sectional drawing of the rotating shaft direction which shows an example of the shaft seal structure of the conventional elevator hoist.

  Hereinafter, an elevator hoist according to Embodiments 1 to 7 of the present invention will be described with reference to the drawings. The present invention is premised on the shaft seal structure of the conventional elevator hoisting machine shown in FIG. 19, and the description of the common configuration is omitted, and the oilproof structure in each embodiment will be described.

[Embodiment 1]
Example 1
FIG. 1 is a cross-sectional view of an essential part of an elevator hoist according to Example 1 of Embodiment 1 of the present invention. There is a left portion below the center line (rotating shaft) of the elevator hoist.

  In this embodiment, the protrusion 13a is provided in the whole circumferential direction centering on a rotating shaft with respect to the outer surface of the machine inner side 11 of the bearing housing 2. FIG. The position of the protrusion 13 a is on the inner peripheral side from the through hole 9. In the present embodiment, the protruding direction of the protrusion 13a is parallel to the rotation axis.

  As a result, in the unlikely event that the lubricant in the bearing portion becomes an abnormal amount of oil, the grease flows out from the first seal portion 4a, and the bearing box 2 is subjected to surface tension by centrifugal force due to rotation or the own weight of the grease. Can be guided to the aircraft inner side 11 by the projection 13a.

  As described above, according to Example 1 of the present embodiment, oil and fat can be prevented from flowing out to the machine exterior side 10 through the plurality of through holes 9. Further, since the protrusion 13a has the same configuration as that in which reinforcing ribs are formed around the rotation axis in the entire circumferential direction, the rigidity of the bearing housing 2 can be increased and the size can be further reduced.

  FIG. 2 shows an enlarged view of a protrusion according to a modification of the present embodiment.

  In this modification, the groove 14a is provided on the inner peripheral surface of the protrusion 13a. Thereby, when the oil and fat flows out from the first seal portion 4a and travels along the outer surface of the bearing housing 2 by the weight of the oil and fat, an effect of securing the oil and fat flowing out into the groove 14a provided in the protrusion 13a can be added. it can.

  Thus, according to this modification, the same effect as the example shown in FIG.

(Example 2)
FIG. 3: shows principal part sectional drawing of the winding machine for elevators which concerns on Example 2 of Embodiment 1 of this invention.

  In Example 1, with respect to the outer surface of the machine inner side 11 of the bearing housing 2, the protrusion 13a is provided in the entire circumferential direction around the rotation axis, and the protruding direction is parallel to the rotation axis. The protrusion 13a has a different configuration in that the protrusion direction is inclined inward (rotational axis direction). As a result, when the oil and fat flows out from the first seal portion 4a and travels along the outer surface of the bearing housing 2 due to its own weight, the protrusion 13a is inclined inward so that the movement toward the braking surface side Can be prevented.

  As described above, according to the present embodiment, the same effects as those of the first embodiment can be obtained, and further oilproofness can be achieved with respect to the inside of the machine.

(Example 3)
FIG. 4: shows principal part sectional drawing of the winding machine for elevators which concerns on Example 3 of Embodiment 1 of this invention.

  In Example 1, with respect to the outer surface of the machine inner side 11 of the bearing housing 2, the protrusion 13a is provided in the entire circumferential direction around the rotation axis, and the protruding direction is parallel to the rotation axis. The protrusions 13a have different configurations in that the protrusion direction of the protrusion 13a is inclined outward (in the anti-rotation axis direction).

  Thereby, when the oil and fat flows out from the first seal portion 4a and travels along the outer surface of the bearing housing 2 due to the weight of the oil and fat, the protruding direction of the protrusion 13a is inclined outward. Thus, the oil and fat can be scattered on the machine inner side 11.

  As described above, according to the present embodiment, the same effects as those of the first embodiment can be obtained, and further oil-proofing can be achieved with respect to the machine interior during rotation.

[Embodiment 2]
FIG. 5 is a cross-sectional view of a main part of an elevator hoist according to Embodiment 2 of the present invention.

  In this embodiment, with respect to the outer surface of the outer side 10 of the bearing box 2, the protrusion 13 b is provided in the entire circumferential direction around the rotation axis, and the position of the protrusion 13 b is on the outer peripheral side from the through hole 9. The projecting direction is inclined inward.

  Thereby, when the oil and oil which flows out from the 1st, 2nd seal | sticker parts 4a and 4b flow out to the machine outer side 10 from the through-hole 9, it can be guide | induced to the machine inner side 11 by the protrusion 13b.

  Thus, according to the present embodiment, it is possible to prevent oil and fat from flowing out to the disc braking surface side through the through hole 9.

  FIG. 6 shows an enlarged view of a protrusion according to a modification of the present embodiment.

  In this modification, the groove 14b is provided on the inner peripheral surface of the protrusion 13b. When the oil and fat flows out from the through hole 9 of the bearing housing 2, the effect of ensuring the oil and fat can be added to the groove 14b provided in the protrusion 13b.

  As described above, according to the present modification, the same effect as that of the example shown in FIG. 5 can be obtained, and further oil resistance can be achieved against the outflow to the disc braking surface side.

[Embodiment 3]
FIG. 7: shows principal part sectional drawing of the hoisting machine for elevators concerning Embodiment 3 of this invention.

  In the first and second embodiments, the plurality of through holes 9 of the bearing housing 2 are parallel to the rotation axis from the machine outside 10 to the machine inside 11. In the present embodiment, a plurality of through holes 9 of the bearing housing 2 are inclined outward from the machine outer side 10 to the machine inner side 11.

  As a result, in the unlikely event that oil or fat travels through the outer surface of the bearing box and rides on the through hole 9, the oil or fat can be guided to the inside of the machine due to the inclination of the through hole 9.

  As described above, according to the present embodiment, it is possible to prevent oil and fat from flowing out through the through hole 9 to the outside 10. The shape, size, and quantity of the through-hole 9 are determined mainly by weight reduction and cooling characteristics of the entire hoisting machine, but the same as long as it is inclined outward from the outboard side 10 to the inside 11 of the machine. An effect can be obtained.

[Embodiment 4]
Example 1
FIG. 8: shows principal part sectional drawing of the hoisting machine for elevators which concerns on Example 1 of Embodiment 4 of this invention.

  In this embodiment, the machine outer side 10 of the sheave 1 has an inner peripheral surface 15 of a recessed section formed by a notch. Thereby, when fats and oils flow out from the through-hole 9 of the bearing box 2, the effect of ensuring fats and oils can be provided.

  Thus, according to Example 1 of the present embodiment, oil and fat can be prevented from flowing out to the disc braking surface side through the through hole 9.

(Example 2)
FIG. 9: shows principal part sectional drawing of the winding machine for elevators which concerns on Example 2 of Embodiment 4 of this invention.

  In this embodiment, the outer side 10 of the sheave 1 has an inner peripheral surface 16 that is inclined outward in the direction toward the inner side 11 formed by a notch. Thereby, when fats and oils flow out from the through-hole 9, the movement to the disc braking surface side by fats and oils self-weight can be prevented.

  As described above, according to the present embodiment, the same effects as those of the first embodiment can be obtained, and further oil resistance can be achieved against the outflow to the disc braking surface side.

[Embodiment 5]
Example 1
FIG. 10: shows principal part sectional drawing of the winding machine for elevators which concerns on Example 1 of Embodiment 5 of this invention.

  In the present embodiment, the ring 17 using a steel material having an arbitrary thickness is attached to the inner peripheral portion of the machine exterior 10 of the sheave 1. The inner periphery of the sheave 1 is cut out to a size that provides an “interference” with respect to the outer diameter of the ring 17, and the ring 17 is fitted. In the present embodiment, the inner peripheral surface of the ring 17 is parallel to the rotation axis. Thereby, when fats and oils flow out from the through-hole 9 of the bearing box 2, the thickness of the ring 17 can dam the fats and oils.

  Thus, according to Example 1 of the present embodiment, oil and fat can be prevented from flowing out to the disc braking surface side through the through hole 9.

  Further, by increasing the thickness of the ring 16, further oil resistance can be achieved against the outflow to the disc braking surface side.

(Example 2)
FIG. 11: shows principal part sectional drawing of the winding machine for elevators which concerns on Example 2 of Embodiment 5 of this invention.

  In the present embodiment, the inner peripheral surface of the ring 17 is inclined outward in the direction of the aircraft inner side 11. As a result, in the unlikely event that oil or fat travels on the inner peripheral surface of the ring 17 and rides, an effect of preventing movement of the oil or fat toward the braking surface due to its own weight can be imparted.

  As described above, according to the present embodiment, the same effects as those of the first embodiment can be obtained, and further oil resistance can be achieved against the outflow to the disc braking surface side.

  FIG. 12 shows an enlarged view of a ring according to a modification of the present embodiment.

  In the present modification, a groove 14 c is provided on the side surface of the ring 17 in the direction of the machine inside 11. Thereby, when fats and oils flow out from the through-hole 9 of the bearing box 2, the effect of ensuring fats and oils can be added.

  As described above, according to the present modification, the same effects as those of the second embodiment can be obtained, and further oil resistance can be achieved against the outflow to the disc braking surface side. This modification may be applied to the first embodiment.

[Embodiment 6]
FIG. 13: shows principal part sectional drawing of the hoisting machine for elevators concerning Embodiment 6 of this invention.

  In the present embodiment, a cover 18 having an L-shaped cross section made of a thin plate is attached by a fixing means (not shown) such as a screw at a position covering the second seal portion 4b on the outer peripheral portion of the annular end lid 3. It is configured. In addition, since the cover 18 is required to have oil resistance, it is desirable that the cover 18 be integrally formed of steel or resin. Accordingly, in the unlikely event that the lubricant in the bearing portion becomes an abnormal amount of oil and the oil and fat flows out from the second seal portion 4b, the outflow path is obstructed and the oil and fat is secured in the gap formed by the cover 18. Can do.

  Thus, according to the present embodiment, it is possible to prevent oil and fat from flowing out from the second seal portion 4b of the end lid 3 to the disc braking surface side.

[Embodiment 7]
FIG. 14: shows principal part sectional drawing of the hoisting machine for elevators concerning Embodiment 7 of this invention.

  In this embodiment, it is set as the structure which the cross-section L-shaped part 19 formed so that it might protrude in the aircraft inner side 11 rather than the joint surface with the end lid 3 in a part of the stand 5 covers the 2nd seal | sticker part 4b. As a result, in the unlikely event that the lubricant in the bearing portion becomes an abnormal amount of oil and the oil and fat flows out from the second seal portion 4b, the outflow path is obstructed, and the oil and fat is put in the gap formed by the cross-sectional L-shaped portion 19. Can be secured.

  As described above, according to this embodiment, it is possible to prevent oil and fat from flowing out from the outer peripheral portion of the end lid 3 toward the disc braking surface.

  FIG. 15 shows an enlarged view of an L-shaped section according to a modification of the present embodiment.

  In this modification, the groove 14 d is provided on the inner peripheral surface of the cross-section L-shaped portion 19 of the stand 5. Thereby, when fats and oils flow out from the 2nd seal | sticker part 4b, the effect of ensuring fats and oils can be added by providing the groove | channel 14d.

  As described above, according to this modification, the same effect as that of the example shown in FIG. 14 can be obtained, and further oil-proofing can be achieved against the outflow to the disc braking surface side.

  The oilproof structure of each embodiment has been described above, but two or more embodiments can be simultaneously implemented and multiplexed. Examples are given below.

  FIG. 16: shows principal part sectional drawing of the winding machine for elevators which implemented Example 1 and Embodiment 3 of Embodiment 1 of this invention simultaneously.

  FIG. 17: shows the principal part sectional drawing of the winding machine for elevators which implemented Example 1, Embodiment 2, and Embodiment 3 of Embodiment 1 of this invention simultaneously.

  FIG. 18 is a cross-sectional view of a main part of an elevator hoisting machine that simultaneously implements Example 1, Embodiment 2, Embodiment 3, and Example 2 of Embodiment 4 of Embodiment 1 of the present invention.

  As described above, since the oil-proof structure is multiplexed (duplex or quadruple) with respect to the path A or B corresponding to the outflow path of the oil and fat generated from the bearing housing 2 side, the oil and fat is disc braked. It is more difficult to adhere to the surface, and the distance to reach the braking surface can be increased to further enhance the oilproofness.

  DESCRIPTION OF SYMBOLS 1 ... Sheave, 2 ... Bearing box, 3 ... End cover, 4a, 4b ... 1st, 2nd seal part, 5 ... Stand, 6 ... Shaft, 7 ... Armature, 8 ... Bearing, 8a ... Outer ring, 8b ... inner ring, 9 ... through hole, 10 ... outer side, 11 ... inner side, 12 ... disc, 13a, 13b ... projection, 14a-14d ... groove, 15 ... inner peripheral surface of recess in cross section, 16 ... inclined inner peripheral surface 17 ... Ring, 18 ... Cover, 19 ... L-shaped section.

Claims (8)

A stator having a shaft with both ends attached to a pair of stands, and a rotor supported by a bearing with respect to the stator;
The rotor includes a cylindrical sheave, a brake disk fixed to an outer peripheral side of one end of the sheave, and a pair of annular housings that are attached to inner peripheral sides of both ends of the sheave and store the bearings. A bearing box, and a pair of annular end covers interposed between the stand and the bearing box, and vents the outside and inside the space formed by the sheave and the bearing box in the bearing box. In the elevator hoisting machine in which a plurality of through holes are provided, and a first seal part for the shaft is formed inside the bearing box and a second seal part for the stand is formed outside the end cover,
With respect to the bearing box at one end of the sheave to which the brake disk is fixed, an oilproof structure is provided in which the protrusions are provided in the entire circumferential direction on the inner side of the inner side of the through hole. Elevator hoisting machine. A stator having a shaft with both ends attached to a pair of stands, and a rotor supported by a bearing with respect to the stator;
The rotor includes a cylindrical sheave, a brake disk fixed to an outer peripheral side of one end of the sheave, and a pair of annular housings that are attached to inner peripheral sides of both ends of the sheave and store the bearings. A bearing box, and a pair of annular end covers interposed between the stand and the bearing box, and vents the outside and inside the space formed by the sheave and the bearing box in the bearing box. In the elevator hoisting machine in which a plurality of through holes are provided, and a first seal part for the shaft is formed inside the bearing box and a second seal part for the stand is formed outside the end cover,
An oilproof structure in which protrusions are provided on the outer side of the outer side of the through hole and inclined inward in the circumferential direction with respect to the bearing box at one end of the sheave to which the brake disk is fixed. An elevator hoisting machine characterized by comprising: A stator having a shaft with both ends attached to a pair of stands, and a rotor supported by a bearing with respect to the stator;
The rotor includes a cylindrical sheave, a brake disk fixed to an outer peripheral side of one end of the sheave, and a pair of annular housings that are attached to inner peripheral sides of both ends of the sheave and store the bearings. A bearing box, and a pair of annular end covers interposed between the stand and the bearing box, and vents the outside and inside the space formed by the sheave and the bearing box in the bearing box. In the elevator hoisting machine in which a plurality of through holes are provided, and a first seal part for the shaft is formed inside the bearing box and a second seal part for the stand is formed outside the end cover,
An elevator hoisting machine comprising an oilproof structure in which the through hole is inclined outward from the outside of the machine to the inside of the machine with respect to the bearing box at one end of the sheave to which the brake disk is fixed. . A stator having a shaft with both ends attached to a pair of stands, and a rotor supported by a bearing with respect to the stator;
The rotor includes a cylindrical sheave, a brake disk fixed to an outer peripheral side of one end of the sheave, and a pair of annular housings that are attached to inner peripheral sides of both ends of the sheave and store the bearings. A bearing box, and a pair of annular end covers interposed between the stand and the bearing box, and vents the outside and inside the space formed by the sheave and the bearing box in the bearing box. In the elevator hoisting machine in which a plurality of through holes are provided, and a first seal part for the shaft is formed inside the bearing box and a second seal part for the stand is formed outside the end cover,
An oilproof structure having an inner peripheral surface of a recess in a cross-section or an inner peripheral surface inclined outward in the direction of the inner side of the machine with respect to one end of the sheave to which the brake disk is fixed, Elevator hoisting machine. A stator having a shaft with both ends attached to a pair of stands, and a rotor supported by a bearing with respect to the stator;
The rotor includes a cylindrical sheave, a brake disk fixed to an outer peripheral side of one end of the sheave, and a pair of annular housings that are attached to inner peripheral sides of both ends of the sheave and store the bearings. A bearing box, and a pair of annular end covers interposed between the stand and the bearing box, and vents the outside and inside the space formed by the sheave and the bearing box in the bearing box. In the elevator hoisting machine in which a plurality of through holes are provided, and a first seal part for the shaft is formed inside the bearing box and a second seal part for the stand is formed outside the end cover,
An elevator hoisting machine comprising an oilproof structure in which a ring is attached to an inner peripheral portion of the outer side of the sheave to which one end of the sheave is fixed. A stator having a shaft with both ends attached to a pair of stands, and a rotor supported by a bearing with respect to the stator;
The rotor includes a cylindrical sheave, a brake disk fixed to an outer peripheral side of one end of the sheave, and a pair of annular housings that are attached to inner peripheral sides of both ends of the sheave and store the bearings. A bearing box, and a pair of annular end covers interposed between the stand and the bearing box, and vents the outside and inside the space formed by the sheave and the bearing box in the bearing box. In the elevator hoisting machine in which a plurality of through holes are provided, and a first seal part for the shaft is formed inside the bearing box and a second seal part for the stand is formed outside the end cover,
An elevator comprising an oilproof structure in which a cover having an L-shaped cross section is attached to the end lid at one end of the sheave to which the brake disk is fixed so as to cover the second seal portion. Hoisting machine. A stator having a shaft with both ends attached to a pair of stands, and a rotor supported by a bearing with respect to the stator;
The rotor includes a cylindrical sheave, a brake disk fixed to an outer peripheral side of one end of the sheave, and a pair of annular housings that are attached to inner peripheral sides of both ends of the sheave and store the bearings. A bearing box, and a pair of annular end covers interposed between the stand and the bearing box, and vents the outside and inside the space formed by the sheave and the bearing box in the bearing box. In the elevator hoisting machine in which a plurality of through holes are provided, and a first seal part for the shaft is formed inside the bearing box and a second seal part for the stand is formed outside the end cover,
An elevator hoisting machine comprising an oilproof structure in which an L-shaped section is formed so as to cover the second seal portion with respect to the stand at one end of the sheave to which the brake disk is fixed. Machine. A stator having a shaft with both ends attached to a pair of stands, and a rotor supported by a bearing with respect to the stator;
The rotor includes a cylindrical sheave, a brake disk fixed to an outer peripheral side of one end of the sheave, and a pair of annular housings that are attached to inner peripheral sides of both ends of the sheave and store the bearings. A bearing box, and a pair of annular end covers interposed between the stand and the bearing box, and vents the outside and inside the space formed by the sheave and the bearing box in the bearing box. In the elevator hoisting machine in which a plurality of through holes are provided, and a first seal part for the shaft is formed inside the bearing box and a second seal part for the stand is formed outside the end cover,
An elevator hoisting machine comprising at least two of the oilproof structures according to claim 1, 2, 3, 4, 5, 6, or 7.

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