WO2023026424A1 - Machine d'enroulement et ascenseur - Google Patents

Machine d'enroulement et ascenseur Download PDF

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Publication number
WO2023026424A1
WO2023026424A1 PCT/JP2021/031302 JP2021031302W WO2023026424A1 WO 2023026424 A1 WO2023026424 A1 WO 2023026424A1 JP 2021031302 W JP2021031302 W JP 2021031302W WO 2023026424 A1 WO2023026424 A1 WO 2023026424A1
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WO
WIPO (PCT)
Prior art keywords
main shaft
oil seal
bearing
rotation detector
attached
Prior art date
Application number
PCT/JP2021/031302
Other languages
English (en)
Japanese (ja)
Inventor
洋嗣 山本
Original Assignee
株式会社日立製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to CN202180101609.6A priority Critical patent/CN117836231A/zh
Priority to JP2023543573A priority patent/JPWO2023026424A1/ja
Priority to PCT/JP2021/031302 priority patent/WO2023026424A1/fr
Publication of WO2023026424A1 publication Critical patent/WO2023026424A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04—Driving gear ; Details thereof, e.g. seals
    • B66B11/08—Driving gear ; Details thereof, e.g. seals with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers

Definitions

  • the present invention relates to a hoist and an elevator.
  • the elevator is equipped with a car placed in the hoistway and a hoist that raises and lowers the car. Further, the hoist includes a housing that constitutes a hoist main body, and a sheave that is rotatably supported by the housing.
  • a hoist is provided with a main shaft fixed to a housing, a rotor rotatably supported by the main shaft via a bearing, an oil seal, a bearing restraining member, and the like.
  • Patent Literature 1 describes a technology related to an elevator equipped with a thin hoist.
  • An object of the present invention is to provide a technique that can further reduce the thickness of the hoist.
  • the present application includes a plurality of means for solving the above problems.
  • One of them is a hollow main shaft, a bearing attached to the outer peripheral side of the main shaft, and a rotatable main shaft via the bearing.
  • a hoisting machine comprising: a supported sheave; The oil seal is attached to the inner peripheral side of the main shaft.
  • FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2; 4 is an enlarged view of a part of FIG. 3; FIG. It is a sectional view showing an example of composition of a winding machine concerning a reference form. It is the figure which expanded a part of winding machine which concerns on other embodiment.
  • FIG. 1 is a schematic cross-sectional view of an elevator according to an embodiment viewed from above.
  • a hoistway 11 of an elevator a car 12, a counterweight 13, and a hoist 14 are arranged.
  • the elevator 10 is a so-called machine-room-less elevator that does not have a machine room above the hoistway 11 .
  • the car 12 and the counterweight 13 are connected by a main rope (wire rope) not shown.
  • the hoisting machine 14 raises and lowers the car 12 and the counterweight 13 in mutually opposite directions.
  • the hoisting machine 14 includes a housing 15 constituting a hoisting machine main body, and a sheave 16 rotatably supported by the housing 15 .
  • the hoisting machine 14 is a so-called thin hoisting machine in which the dimension in the thickness direction, which is the direction parallel to the rotation center axis of the sheave 16, is kept small.
  • the main rope is wound around the sheave 16 .
  • the main rope moves according to the direction and speed of rotation of the sheave 16 .
  • the car 12 and the counterweight 13 move up and down in the hoistway 11 in opposite directions as the main rope moves.
  • FIG. 2 is a front view showing a configuration example of the hoist according to the embodiment
  • FIG. 3 is a sectional view taken along line AA of FIG.
  • the hoisting machine 14 includes, in addition to the housing 15 and sheave 16 described above, a hollow main shaft 17 fixed to the housing 15 and an electric motor for rotating the sheave 16. 18, a brake device 20 for braking the rotation of the sheave 16, bearings 21 and 22 attached to the outer peripheral side of the main shaft 17, a bearing restraining member 23, a first oil seal 24, and a second oil seal. 26, a rotation detector 28 that detects rotation of the sheave 16, a support 30 that supports the rotation detector 28, and a cover member 32. In addition, in FIG. 3, the notation of the brake device 20 is omitted.
  • the housing 15 is manufactured by integrally molding the entire housing 15 with cast iron or the like, and then finishing the parts that require dimensional accuracy by machining.
  • a hollow boss portion 34 is integrally formed in the central portion of the housing 15 .
  • a storage recess 35 is formed integrally with the outer peripheral portion of the housing 15 .
  • a leg portion 36 for installing the hoisting machine 14 is integrally formed on the bottom portion of the housing 15 .
  • the sheave 16 is rotatably supported by the main shaft 17 via bearings 21 and 22.
  • a plurality of grooves 16 a are formed on the outer peripheral surface of the sheave 16 .
  • a main rope (not shown) is wound around the plurality of grooves 16a.
  • the sheave 16 is fixed to a second annular portion 54 of a rotor 52, which will be described later.
  • shrink fitting can be used as a method of fixing the sheave 16 to the second annular portion 54.
  • shrink fitting can be used. When shrink fitting is used, first, the sheave 16 is heated and expanded, then the second annular portion 54 is fitted to the inner peripheral side of the sheave 16, and then the sheave 16 is cooled. As a result, the sheave 16 can be fixed to the second annular portion 54 using the compressive force generated by cooling the sheave 16 .
  • the main shaft 17 is made of carbon steel, for example, and is cylindrical. However, the inner diameter and the outer diameter of the main shaft 17 are not uniform in the central axis direction of the main shaft 17 . That is, both the inner peripheral surface and the outer peripheral surface of the main shaft 17 have a stepped structure.
  • the main shaft 17 is inserted into the boss portion 34 of the housing 15 .
  • the main shaft 17 is fixed to the boss portion 34 by press-fitting the main shaft 17 into the boss portion 34 using an interference fit, for example.
  • a hollow portion 38 is formed on the central axis of the main shaft 17 .
  • the hollow portion 38 is formed so as to pass through the main shaft 17 in the central axis direction.
  • the hollow portion 38 is divided into a plurality of stages (three stages in the illustrated example) of hollow portions 38a to 38c.
  • the multiple stages of hollow portions 38a to 38c are concentrically formed to communicate with each other. Communicating means being spatially connected.
  • the hollow portion 38b is located between the hollow portion 38a and the hollow portion 38c in the central axis direction of the main shaft 17 (horizontal direction in FIG. 3).
  • the hollow portions 38a to 38c have different inner diameters. Specifically, the inner diameter of the hollow portion 38b is larger than the inner diameter of the hollow portion 38a and smaller than the inner diameter of the hollow portion 38c.
  • An end surface 40 and a stepped portion 41 are formed in the hollow portion 38c. Both the end surface 40 and the stepped portion 41 are formed on the inner peripheral side of the main shaft 17 .
  • the end face 40 is formed in a planar shape in a direction perpendicular to the central axis of the main shaft 17 .
  • a plurality of screw holes (not shown) are formed in the end face 40 .
  • the stepped portion 41 is formed by enlarging the inner diameter of the open end of the hollow portion 38c by machining or the like.
  • a first abutment portion 45, a second abutment portion 46, a first mounting surface 47, and a second mounting surface 48 are formed on the outer peripheral surface of the main shaft 17.
  • the first abutment portion 45 is a portion abutted against the end portion of the boss portion 34 when the main shaft 17 is inserted into the boss portion 34 of the housing 15 .
  • the second abutting portion 46 is a portion against which the first oil seal 24 abuts.
  • the outer diameter of the second abutting portion 46 is larger than the outer diameter of the first mounting surface 47 .
  • the first mounting surface 47 is a surface on which the first oil seal 24 is mounted.
  • the outer diameter of the first mounting surface 47 is larger than the outer diameter of the second mounting surface 48 .
  • the second mounting surface 48 is a surface on which the bearings 21 and 22 and the bearing restraining member 23 are mounted.
  • the electric motor 18 has a stator 50 and a rotor 52 .
  • the stator 50 is configured by winding a coil around a laminated steel plate that serves as the iron core of the electric motor 18 .
  • the stator 50 is housed in the housing recess 35 of the housing 15 . Also, the stator 50 is fixed to the housing 15 .
  • the rotor 52 is attached to the main shaft 17 via bearings 21 and 22 .
  • the rotor 52 is rotatably supported by bearings 21 and 22 .
  • the rotor 52 integrally has a first annular portion 53 , a second annular portion 54 and a third annular portion 55 .
  • the inner and outer diameters of the second annular portion 54 are smaller than the inner and outer diameters of the first annular portion 53 and larger than the inner and outer diameters of the third annular portion 55 .
  • the first annular portion 53 is housed in the housing recess 35 of the housing 15 .
  • a magnet layer 51 is provided in a fixed state on the inner peripheral surface of the first annular portion 53 .
  • the magnet layer 51 is formed along the inner peripheral surface of the first annular portion 53 .
  • the magnet layer 51 is formed by alternately arranging N-pole magnets and S-pole magnets in the circumferential direction.
  • the inner peripheral surface of the magnet layer 51 faces the outer peripheral surface of the stator 50 with a gap therebetween.
  • the second annular portion 54 is arranged to protrude outward (to the right in FIG. 3) from the open end 15a of the housing 15 in the central axis direction of the main shaft 17 .
  • a sheave 16 is fixed to the second annular portion 54 . Therefore, the rotor 52 rotates integrally with the sheave 16 .
  • the third annular portion 55 is arranged on the inner diameter side of the second annular portion 54 .
  • the brake device 20 is mounted on the shoulder of the housing 15, as shown in FIG.
  • the brake devices 20 are arranged in pairs on the left and right when the hoist 14 is viewed from the front.
  • the bearings 21 and 22 are mounted on the second mounting surface 48 of the main shaft 17.
  • Bearings 21 and 22 are configured by, for example, ball bearings or roller bearings.
  • the inner ring of each bearing 21, 22 is in contact with the second mounting surface 48 of the main shaft 17 with a predetermined pressure.
  • the outer rings of the bearings 21 and 22 are in contact with the inner peripheral surface of the third annular portion 55 with a predetermined pressure.
  • the bearing 21 abuts against a stepped portion 49 of the main shaft 17 in the central axis direction of the main shaft 17 .
  • the stepped portion 49 is a step formed by the difference between the outer diameter of the first mounting surface 47 and the outer diameter of the second mounting surface 48 .
  • a gap is formed by the protrusion 56 between the bearings 21 and 22 that are adjacent to each other in the central axis direction of the main shaft 17 .
  • the projecting portion 56 is formed integrally with the third annular portion 55 . Further, the projecting portion 56 is formed in a state of projecting radially inward from the inner peripheral surface of the third annular portion 55 .
  • the bearing restraining member 23 is attached to the outer peripheral side of the main shaft 17. Specifically, the bearing restraining member 23 is attached to the second attachment surface 48 of the main shaft 17 .
  • the bearing suppressing member 23 is an annular member that suppresses movement of the bearings 21 and 22 in the central axis direction of the main shaft 17 .
  • Bearing restraining member 23 is configured by, for example, a nut member having a female screw. When the bearing restraining member 23 is made of a nut member, a male screw (not shown) is formed on the second mounting surface 48 of the main shaft 17, and the female screw of the bearing restraining member 23 is engaged with this male screw. .
  • the bearing suppressing member 23 By tightening the bearing suppressing member 23 with a predetermined torque, the bearing suppressing member 23 is pressed against the inner ring of the bearing 22 . As a result, the bearings 21 and 22 are sandwiched between the stepped portion 49 of the main shaft 17 and the bearing restraining member 23 . Therefore, the movement of the bearings 21 and 22 in the central axis direction of the main shaft 17 can be restricted by the bearing restraining member 23 .
  • the first oil seal 24 and the second oil seal 26 are seal members that suppress leakage of lubricating oil supplied to the bearings 21 and 22 .
  • the first oil seal 24 is attached to the outer peripheral side of the main shaft 17 . Specifically, the first oil seal 24 is attached to the first attachment surface 47 of the main shaft 17 .
  • the first oil seal 24 is arranged on the inner side (back side) of the bearings 21 and 22 when viewed from the mounting position side of the cover member 32 (right side in FIG. 3).
  • the first oil seal 24 is an annular sealing member.
  • the inner peripheral surface of the first oil seal 24 is in close contact with the first mounting surface 47 .
  • the outer peripheral surface of the first oil seal 24 is in close contact with the inner peripheral surface of the collar 57 .
  • the collar 57 is formed in an annular shape.
  • the outer peripheral surface of the collar 57 is in contact with the inner peripheral surface of the third annular portion 55 .
  • the second oil seal 26 is attached to the inner peripheral side of the main shaft 17 .
  • the second oil seal 26 is attached to a stepped portion 41 formed in the hollow portion 38 c of the main shaft 17 .
  • the second oil seal 26 is arranged on the outer side (front side) of the first oil seal 24 when viewed from the mounting position side of the cover member 32 (right side in FIG. 3).
  • the outer side means the side closer to the end of the main shaft 17 in the direction of the central axis of the main shaft 17, and the inner side means the side farther from the end of the main shaft 17, that is, the middle portion of the main shaft 17 in the length direction.
  • the second oil seal 26 is an annular sealing member.
  • the outer peripheral surface of the second oil seal 26 is in close contact with the inner peripheral surface of the stepped portion 41 .
  • the inner peripheral surface of the second oil seal 26 is in close contact with a seal restraining surface 63 of the cover member 32, which will be described later.
  • the inner diameter of the second oil seal 26 is larger than the outer diameter of the rotation detector 28 so that the rotation detector 28 can pass through the hole of the second oil seal 26 .
  • the second oil seal 26 is arranged on the inner diameter side of the bearing restraining member 23 so that the thickness region of the second oil seal 26 overlaps the thickness region of the bearing restraining member 23 in the central axis direction of the main shaft 17 .
  • the second oil seal 26 is arranged such that the thickness region E2 of the second oil seal 26 partially overlaps the thickness region E1 of the bearing restraining member 23 . It is arranged on the inner diameter side of the restraining member 23 .
  • the inner diameter side of the bearing suppressing member 23 means the inner side in the radial direction of the imaginary circle defining the inner diameter of the bearing suppressing member 23 .
  • the thickness region E2 of the second oil seal 26 may partially or entirely overlap the thickness region E1 of the bearing restraining member 23 .
  • the rotation detector 28 is arranged in the hollow portion 38b of the main shaft 17.
  • Rotation detector 28 is configured by, for example, a rotary encoder.
  • the outer diameter of the rotation detector 28 is smaller than the inner diameter of the hollow portion 38b, and the rotation detector 28 is accommodated in the hollow portion 38b by utilizing the difference in these dimensions.
  • the outer diameter of the rotation detector 28 means the outer diameter of the cylindrical main body of the rotation detector 28 , that is, the maximum diameter of the rotation detector 28 .
  • the rotation detector 28 has a shaft portion 28a.
  • a body portion of the rotation detector 28 incorporates a detection portion (not shown) for detecting rotation of the shaft portion 28a.
  • the shaft portion 28 a protrudes from the body portion of the rotation detector 28 .
  • a cable (not shown) is connected to the body portion of the rotation detector 28 .
  • a cable of the rotation detector 28 is led out of the hoist 14 through the hollow portion 38 a of the main shaft 17 .
  • This cable is a cable for supplying power to the rotation detector 28 and extracting the output signal of the rotation detector 28 .
  • the support 30 is composed of, for example, a leaf spring in order to elastically support the rotation detector 28 .
  • the maximum dimension of the support 30 in the direction perpendicular to the central axis of the main shaft 17 (radial direction) is smaller than the inner diameter of the second oil seal 26 so that the support 30 can pass through the hole of the second oil seal 26. is preferred.
  • the support 30 is provided with a hole (not shown) through which the shaft portion 28a of the rotation detector 28 is passed. This hole is formed to avoid interference between the shaft portion 28a and the support 30. As shown in FIG. A portion of the support 30 is fixed to the end face of the body portion of the rotation detector 28 .
  • the support 30 is fixed by a plurality of screws 58 to the end surface 40 formed in the hollow portion 38c of the main shaft 17. As shown in FIG.
  • the support 30 is provided with a fixing hole (not shown) through which the male threaded portion of the screw 58 is passed.
  • the fixing holes are holes for fixing the support 30 to the housing 15 using the screw holes described above.
  • the cover member 32 is attached to the rotor 52 so as to shield the hollow portion 38b of the main shaft 17 in which the rotation detector 28 is arranged from the outside.
  • the cover member 32 is made of carbon steel, for example, and is fixed to the end surface of the third annular portion 55 using bolts (not shown) or the like. Therefore, the cover member 32 rotates integrally with the sheave 16 and the rotor 52 .
  • the cover member 32 is a disk-shaped member.
  • a joint portion 60 is provided at the central portion of the cover member 32 .
  • the joint portion 60 is connected to the shaft portion 28 a of the rotation detector 28 . Therefore, when the cover member 32 rotates together with the rotor 52 , the shaft portion 28 a of the rotation detector 28 rotates together with the cover member 32 . That is, the cover member 32 functions to transmit the rotation of the rotor 52 to the shaft portion 28 a of the rotation detector 28 .
  • the cover member 32 also functions to prevent dust, dirt, etc. from entering the hollow portion 38 of the main
  • a plurality of (two in the figure) through holes 62 are provided in the cover member 32 .
  • the through hole 62 is a hole for inserting a tool for turning the screw 58 described above.
  • a tool may be, for example, a screwdriver used to tighten or loosen the screw 58 .
  • the through hole 62 is arranged at a position where the screw 58 can be tightened with the above-described tool with respect to a screw hole (not shown) formed in the end face 40 of the hollow portion 38c.
  • the inner diameter of the through hole 62 is preferably larger than the outer diameter of the head of the screw 58 so that the screw 58 can pass through the through hole 62 .
  • the cover member 32 is provided with a seal restraining surface 63 .
  • the seal holding surface 63 is formed outside the position of the through hole 62 in the radial direction of the cover member 32 .
  • the inner peripheral surface of the second oil seal 26 is in slidable contact with the seal restraining surface 63 .
  • the inner peripheral surface of the second oil seal 26 is in close contact with the seal restraining surface 63 .
  • the space from the first oil seal 24 to the second oil seal 26 is a space sealed by the main shaft 17, the rotor 52 and the cover member 32.
  • a restraining member 23 is arranged.
  • the rotor 52 rotates due to the current flowing through the coils of the stator 50 .
  • the sheave 16 and the cover member 32 rotate integrally with the rotor 52 .
  • the rotation of the rotor 52 is transmitted to the shaft portion 28 a of the rotation detector 28 by the cover member 32 . Therefore, the shaft portion 28 a of the rotation detector 28 rotates integrally with the sheave 16 and the rotor 52 . Rotation of the sheave 16 can thus be detected by the rotation detector 28 .
  • the rotation of the sheave 16 detected by the rotation detector 28 includes the rotational speed, direction of rotation, and amount of rotation of the sheave 16 .
  • FIG. 5 is a cross-sectional view showing a configuration example of a hoist according to the reference embodiment.
  • each component of the hoist according to the reference embodiment is replaced with the hoist according to the above embodiment.
  • the letter "A" to the reference numerals attached to the components of the hoisting machine 14
  • the correspondence between the components is clarified.
  • the reference numerals of some of the constituent elements are omitted, and the constituent elements that the hoisting machine 14 according to the above embodiment does not have are given new reference numerals.
  • the hoist 14A includes a housing 15A, a sheave 16A, a main shaft 17A, an electric motor 18A, bearings 21A and 22A, a bearing suppressing member 23A, and a first oil seal 24A. , a second oil seal 26A, a rotation detector 28A, a support 30A, a cover member 32A and a collar 57A.
  • the electric motor 18A has a stator 50A and a rotor 52A.
  • the hoisting machine 14A also includes a collar 71 and a collar 72 .
  • the second oil seal 26A is attached to the outer peripheral side of the main shaft 17A.
  • the second oil seal 26A is arranged in series along the central axis of the main shaft 17A together with the first oil seal 24A, the bearings 21A and 22A, and the bearing restraining member 23A.
  • the first oil seal 24, the bearings 21A, 22A, the bearing restraining member 23A and the second oil seal 26A are arranged in series on the outer peripheral side of the main shaft 17A, the winding in the central axis direction of the main shaft 17A is reduced.
  • the dimension of the upper machine 14A that is, the thickness dimension of the hoist 14A becomes large.
  • the hoist 14A can be further thinned. It is difficult.
  • the second oil seal 26 is attached to the inner peripheral side of the main shaft 17 .
  • the number of parts arranged in series on the outer peripheral side of the main shaft 17 can be reduced. Therefore, the hoist 14 can be further thinned.
  • the second oil seal 26 by arranging the second oil seal 26 on the inner peripheral side of the main shaft 17, the number of parts can be reduced as compared with the hoist 14A according to the reference embodiment. The reason is as follows.
  • a male screw for attaching a bearing restraining member 23A made of a nut member is formed near the end of the outer peripheral surface of the main shaft 17A.
  • the second oil seal 26A cannot be directly attached to the portion where the male thread is formed. Therefore, in the hoist 14A according to the reference embodiment, the second oil seal 26A is attached to the main shaft 17A via the collar 71. As shown in FIG. In addition, it is recommended that the material of the mating side with which the lip surface (sliding surface) of the oil seal contacts is carbon steel.
  • the rotor 52A of the electric motor 18A is made of cast iron.
  • the collar 72 made of carbon steel is attached so that the material of the counterpart with which the outer peripheral surface of the second oil seal 26A contacts is carbon steel.
  • the second oil seal 26 is attached to the inner peripheral side of the main shaft 17 so as not to interfere with the attachment position of the bearing restraining member 23 . Therefore, the second oil seal 26 can be attached directly to the main shaft 17 without using a collar. Therefore, the collar 71 is unnecessary. Also, the outer peripheral surface of the second oil seal 26 does not come into contact with the rotor 52 made of cast iron. Therefore, the collar 72 is also unnecessary.
  • the number of parts can be reduced in the hoist 14 according to the embodiment as compared with the hoist 14A according to the reference embodiment.
  • the second oil seal 26 is arranged such that the thickness region E2 of the second oil seal 26 overlaps the thickness region E1 of the bearing restraining member 23 in the central axis direction of the main shaft 17 .
  • it is arranged on the inner diameter side of the bearing suppressing member 23 .
  • the second oil seal 26 since the inner diameter of the second oil seal 26 is larger than the outer diameter of the rotation detector 28, when the rotation detector 28 is attached and detached, the second oil seal 26 and Interference with the rotation detector 28 can be avoided. As a result, when replacing the rotation detector 28 due to failure of the rotation detector 28, for example, the rotation detector 28 can be replaced while the second oil seal 26 is still attached. Therefore, when the rotation detector 28 is replaced, the second oil seal 26 does not need to be attached/detached.
  • the support 30 is fixed to the main shaft 17 by the screw 58, and the cover member 32 is provided with a through hole 62 into which a tool for turning the screw 58 can be inserted. ing. Therefore, after attaching the cover member 32 to the rotor 52, the support 30 can be fixed to the main shaft 17 by inserting a tool such as a screwdriver into the through hole 62 and turning the screw 58 in the tightening direction.
  • the maximum dimension of the support 30 in the direction perpendicular to the central axis of the main shaft 17 is smaller than the inner diameter of the second oil seal 26 .
  • the attachment/detachment operation of the rotation detector 28 can be performed while the body 30 is attached.
  • the inner diameter of the through hole 62 provided in the cover member 32 is larger than the outer diameter of the head of the screw 58, so that after the cover member 32 is attached to the rotor 52, However, the support 30 can be fixed to the spindle 17 by inserting the screw 58 into the through hole 62 together with a tool.
  • the present invention is not limited to the above-described embodiments, and includes various modifications.
  • the details of the present invention have been described for easy understanding, but the present invention is not necessarily limited to having all the configurations described in the above-described embodiments.
  • part of the configuration of one embodiment can be replaced with the configuration of another embodiment.
  • add the configuration of another embodiment to the configuration of one embodiment.
  • the second oil seal 26 is arranged on the inner diameter side of the bearing restraining member 23 so that the thickness region E1 of the bearing restraining member 23 and the thickness region E2 of the second oil seal 26 overlap.
  • they may be arranged on the inner diameter side of the bearings 21 and 22 so as to overlap.
  • the thickness region E3 of the bearings 21 and 22 can be used as a region for attaching the second oil seal 26.
  • the thickness region E2 of the second oil seal 26 may partially or entirely overlap with the thickness region E3 of the bearings 21 and 22 .

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

La présente invention concerne une machine d'enroulement comprenant un arbre principal creux, un palier fixé au côté périphérie externe de l'arbre principal, une poulie supportée de manière rotative par l'arbre principal par l'intermédiaire du palier, un premier joint d'étanchéité à l'huile disposé sur le côté interne dans la direction d'axe central de l'arbre principal, et un second joint d'étanchéité à l'huile disposé sur son côté externe. Le second joint d'étanchéité à l'huile est fixé au côté périphérie interne de l'arbre principal.
PCT/JP2021/031302 2021-08-26 2021-08-26 Machine d'enroulement et ascenseur WO2023026424A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202180101609.6A CN117836231A (zh) 2021-08-26 2021-08-26 曳引机和电梯
JP2023543573A JPWO2023026424A1 (fr) 2021-08-26 2021-08-26
PCT/JP2021/031302 WO2023026424A1 (fr) 2021-08-26 2021-08-26 Machine d'enroulement et ascenseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/031302 WO2023026424A1 (fr) 2021-08-26 2021-08-26 Machine d'enroulement et ascenseur

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WO2023026424A1 true WO2023026424A1 (fr) 2023-03-02

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CN (1) CN117836231A (fr)
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015125266A1 (fr) * 2014-02-21 2015-08-27 株式会社日立製作所 Dispositif d'ascenseur
JP2016036890A (ja) * 2014-08-11 2016-03-22 株式会社日立製作所 シール交換方法及びシール交換装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015125266A1 (fr) * 2014-02-21 2015-08-27 株式会社日立製作所 Dispositif d'ascenseur
JP2016036890A (ja) * 2014-08-11 2016-03-22 株式会社日立製作所 シール交換方法及びシール交換装置

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CN117836231A (zh) 2024-04-05
JPWO2023026424A1 (fr) 2023-03-02

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