WO2023026424A1 - Winding machine and elevator - Google Patents

Winding machine and elevator 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
French (fr)
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 PCT/JP2021/031302 priority Critical patent/WO2023026424A1/en
Priority to CN202180101609.6A priority patent/CN117836231A/en
Publication of WO2023026424A1 publication Critical patent/WO2023026424A1/en

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    • 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 .

Abstract

This winding machine comprises a hollow main shaft, a bearing attached to the outer-periphery side of the main shaft, a sheave rotatably supported by the main shaft via the bearing, a first oil seal arranged on the inner side in the central-axis direction of the main shaft, and a second oil seal arranged on the outer side thereof. The second oil seal is attached to the inner-periphery side of the main shaft.

Description

巻上機およびエレベーターHoists and elevators
　本発明は、巻上機およびエレベーターに関する。 The present invention relates to a hoist and an elevator.
　エレベーターは、昇降路内に配置される乗りかごと、乗りかごを昇降させる巻上機と、を備えている。また、巻上機は、巻上機本体を構成する筐体と、筐体に回転可能に支持される綱車と、を備えている。巻上機には、筐体に固定される主軸や、主軸に軸受を介して回転可能に支持されるロータなどの他に、オイルシールや軸受抑え部材などが設けられる。 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.
　近年では、巻上機の専有面積を小さく抑えるために、巻上機の薄型化が求められている。特に、機械室レスエレベーターでは、巻上機が、乗りかごや釣り合い錘と共に昇降路内に配置されるため、巻上機の薄型化が強く求められる。特許文献１には、薄型巻上機を備えるエレベーターに関する技術が記載されている。 In recent years, in order to reduce the area occupied by the hoist, there has been a demand for a thinner hoist. In particular, in a machine room-less elevator, since the hoist is arranged in the hoistway together with the car and the counterweight, there is a strong demand for a thin hoist. Patent Literature 1 describes a technology related to an elevator equipped with a thin hoist.
国際公開第２０１５／１２５２６６号WO2015/125266
　しかしながら、特許文献１に記載されたエレベーターの薄型巻上機では、軸受やオイルシールなどの部品が、主軸の中心軸方向に直列に配置され、かつ、それらの部品の寸法が規格で定められているため、巻上機の更なる薄型化を図ることが困難であった。 However, in the thin elevator hoist described in Patent Document 1, parts such as bearings and oil seals are arranged in series in the central axis direction of the main shaft, and the dimensions of these parts are defined by standards. Therefore, it was difficult to further reduce the thickness of the hoist.
　本発明の目的は、巻上機の更なる薄型化を図ることができる技術を提供することにある。 An object of the present invention is to provide a technique that can further reduce the thickness of the hoist.
　上記課題を解決するために、たとえば、請求の範囲に記載された構成を採用する。
　本願は、上記課題を解決する手段を複数含んでいるが、その一つを挙げるならば、中空状の主軸と、主軸の外周側に取り付けられた軸受と、主軸に軸受を介して回転可能に支持される綱車と、主軸の中心軸方向においてインナー側に配置される第１のオイルシールおよびアウター側に配置される第２のオイルシールと、を備える巻上機であって、第２のオイルシールは、主軸の内周側に取り付けられている。 In order to solve the above problems, for example, the configurations described in the claims are adopted.
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.
　本発明によれば、主軸の中心軸方向に直列に配置される部品の数を減らして、巻上機の更なる薄型化を図ることができる。
　上記した以外の課題、構成および効果は、以下の実施形態の説明によって明らかにされる。 According to the present invention, it is possible to further reduce the thickness of the hoist by reducing the number of parts arranged in series in the central axis direction of the main shaft.
Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.
本実施形態に係るエレベーターを上方から見た概略断面図である。It is the schematic sectional drawing which looked at the elevator which concerns on this embodiment from upper direction. 実施形態に係る巻上機の構成例を示す正面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the structural example of the winding machine which concerns on embodiment. 図２のＡ－Ａ断面図である。FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2; 図３の一部を拡大した図である。4 is an enlarged view of a part of FIG. 3; FIG. 参考形態に係る巻上機の構成例を示す断面図である。It is a sectional view showing an example of composition of a winding machine concerning a reference form. 他の実施形態に係る巻上機の一部を拡大した図である。It is the figure which expanded a part of winding machine which concerns on other embodiment.
　以下、本発明の実施形態について図面を参照して詳細に説明する。本明細書および図面において、実質的に同一の機能または構成を有する要素については、同一の符号を付し、重複する説明は省略する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this specification and the drawings, elements having substantially the same function or configuration are denoted by the same reference numerals, and overlapping descriptions are omitted.
　図１は、実施形態に係るエレベーターを上方から見た概略断面図である。
　図１に示すように、エレベーター１０の昇降路１１内には、乗りかご１２と、釣り合い錘１３と、巻上機１４とが配置されている。エレベーター１０は、昇降路１１の上方に機械室を有しない、いわゆる機械室レスエレベーターである。乗りかご１２と釣り合い錘１３は、図示しない主索（ワイヤロープ）によって接続される。 FIG. 1 is a schematic cross-sectional view of an elevator according to an embodiment viewed from above.
As shown in FIG. 1, in a hoistway 11 of an elevator 10, 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.
　巻上機１４は、乗りかご１２および釣り合い錘１３を互いに反対方向に昇降させる。巻上機１４は、巻上機本体を構成する筐体１５と、筐体１５に回転可能に支持される綱車１６と、を備えている。巻上機１４は、綱車１６の回転中心軸と平行な方向である厚み方向の寸法を小さく抑えた、いわゆる薄型巻上機である。綱車１６には上記主索が巻き掛けられる。主索は、綱車１６の回転方向および回転速度に従って移動する。乗りかご１２および釣り合い錘１３は、主索の移動に従って昇降路１１内を互いに反対方向に昇降する。 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.
　図２は、実施形態に係る巻上機の構成例を示す正面図であり、図３は、図２のＡ－Ａ断面図である。
　図２および図３に示すように、巻上機１４は、上述した筐体１５および綱車１６の他に、筐体１５に固定された中空状の主軸１７と、綱車１６を回転させる電動機１８と、綱車１６の回転を制動するブレーキ装置２０と、主軸１７の外周側に取り付けられた軸受２１，２２と、軸受抑え部材２３と、第１のオイルシール２４と、第２のオイルシール２６と、綱車１６の回転を検出する回転検出器２８と、回転検出器２８を支持する支持体３０と、カバー部材３２と、を備えている。なお、図３においては、ブレーキ装置２０の表記を省略している。 FIG. 2 is a front view showing a configuration example of the hoist according to the embodiment, and FIG. 3 is a sectional view taken along line AA of FIG.
As shown in FIGS. 2 and 3, 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.
　筐体１５は、鋳鉄などで筐体１５全体を一体成形した後、寸法精度が要求される部分を機械加工によって仕上げることにより製作される。筐体１５の中心部には、中空状のボス部３４が一体に形成されている。筐体１５の外周部には、収納凹部３５が一体に形成されている。また、筐体１５の底部には、巻上機１４を設置するための脚部３６が一体に形成されている。 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 .
　綱車１６は、主軸１７に軸受２１，２２を介して回転可能に支持されている。綱車１６の外周面には、複数の溝１６ａが形成されている。複数の溝１６ａには、図示しない主索が巻き掛けられる。綱車１６は、後述するロータ５２の第２の円環部５４に固定されている。綱車１６を第２の円環部５４に固定する方法としては、たとえば、焼き嵌めを利用することができる。焼き嵌めを利用する場合は、まず、綱車１６を加熱膨張させ、次いで、綱車１６の内周側に第２の円環部５４を嵌め込み、その後、綱車１６を冷却させる。これにより、綱車１６の冷却による圧縮力を利用して、第２の円環部５４に綱車１６を固定することができる。 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. As a method of fixing the sheave 16 to the second annular portion 54, for example, 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 .
　主軸１７は、たとえば炭素鋼によって構成されるもので、円筒状に形成されている。ただし、主軸１７の内径および外径は、主軸１７の中心軸方向で一様にはなっていない。つまり、主軸１７の内周面および外周面は、いずれも段付き構造になっている。主軸１７は、筐体１５のボス部３４に挿入されている。主軸１７は、たとえば、ボス部３４と主軸１７との嵌め合いを締まり嵌めとし、主軸１７をボス部３４に圧入することにより、ボス部３４に固定されている。主軸１７の中心軸上には中空部３８が形成されている。中空部３８は、主軸１７を中心軸方向に貫通するように形成されている。中空部３８は、複数段（図例では３段）の中空部３８ａ～３８ｃに区分されている。複数段の中空部３８ａ～３８ｃは、互いに連通して同心状に形成されている。連通とは、空間的につながっているという意味である。 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.
　主軸１７の中心軸方向（図３の左右方向）において、中空部３８ｂは、中空部３８ａと中空部３８ｃとの間に位置している。中空部３８ａ～３８ｃは、それぞれ内径が異なる。具体的には、中空部３８ｂの内径は、中空部３８ａの内径よりも大きく、かつ、中空部３８ｃの内径よりも小さい。中空部３８ｃには、端面４０と段付き部４１とが形成されている。端面４０と段付き部４１は、いずれも主軸１７の内周側に形成されている。端面４０は、主軸１７の中心軸と直交する向きで平面状に形成されている。端面４０には、図示しない複数のネジ孔が形成されている。段付き部４１は、中空部３８ｃの開口端の内径を機械加工等によって拡大することにより形成されている。 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.
　一方、主軸１７の外周面には、第１の突き当て部４５と、第２の突き当て部４６と、第１の取り付け面４７と、第２の取り付け面４８とが形成されている。第１の突き当て部４５は、筐体１５のボス部３４に主軸１７を挿入するときに、ボス部３４の端部に突き当てられる部分である。第２の突き当て部４６は、第１のオイルシール２４が突き当てられる部分である。第２の突き当て部４６の外径は、第１の取り付け面４７の外径よりも大きい。第１の取り付け面４７は、第１のオイルシール２４が取り付けられる面である。第１の取り付け面４７の外径は、第２の取り付け面４８の外径よりも大きい。第２の取り付け面４８は、軸受２１，２２および軸受抑え部材２３が取り付けられる面である。 On the other hand, 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.
　電動機１８は、ステータ５０およびロータ５２を有する。ステータ５０は、図示はしないが、電動機１８の鉄心となる積層鋼板にコイルを巻き付けて構成される。ステータ５０は、筐体１５の収納凹部３５に収納されている。また、ステータ５０は、筐体１５に固定されている。ロータ５２は、主軸１７に軸受２１，２２を介して取り付けられている。ロータ５２は、軸受２１，２２によって回転自在に支持されている。ロータ５２は、第１の円環部５３と、第２の円環部５４と、第３の円環部５５とを一体に有する。第２の円環部５４の内径および外径は、第１の円環部５３の内径および外径よりも小さく、かつ、第３の円環部５５の内径および外径よりも大きい。 The electric motor 18 has a stator 50 and a rotor 52 . Although not shown, 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 .
　第１の円環部５３は、筐体１５の収納凹部３５に収容されている。第１の円環部５３の内周面には、マグネット層５１が固定状態で設けられている。マグネット層５１は、第１の円環部５３の内周面に沿って形成されている。また、マグネット層５１は、Ｎ極の磁石とＳ極の磁石とを円周方向に交互に配置することによって形成されている。マグネット層５１の内周面は、ステータ５０の外周面と隙間を介して対向している。第２の円環部５４は、主軸１７の中心軸方向において筐体１５の開口端１５ａよりも外側（図３の右側）に突き出して配置されている。第２の円環部５４には綱車１６が固定されている。このため、ロータ５２は、綱車１６と一体に回転する。第３の円環部５５は、第２の円環部５４の内径側に配置されている。 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 .
　ブレーキ装置２０は、図２に示すように、筐体１５の肩部に実装されている。ブレーキ装置２０は、巻上機１４を正面から見て左右に対をなして配置されている。 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.
　軸受２１，２２は、主軸１７の第２の取り付け面４８に取り付けられている。軸受２１，２２は、たとえば、玉軸受やコロ軸受などによって構成される。各々の軸受２１，２２の内輪は、主軸１７の第２の取り付け面４８に所定の圧力で接触している。各々の軸受２１，２２の外輪は、上述した第３の円環部５５の内周面に所定の圧力で接触している。また、主軸１７の中心軸方向において、軸受２１は、主軸１７の段差部分４９に突き当てられている。段差部分４９は、第１の取り付け面４７の外径と第２の取り付け面４８の外径との差によって形成される段差である。主軸１７の中心軸方向で隣り合う軸受２１と軸受２２との間には、突起部５６によって隙間が形成されている。突起部５６は、第３の円環部５５と一体に形成されている。また、突起部５６は、第３の円環部５５の内周面から径方向内側に突出する状態で形成されている。 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. In addition, 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 .
　軸受抑え部材２３は、主軸１７の外周側に取り付けられている。具体的には、軸受抑え部材２３は、主軸１７の第２の取り付け面４８に取り付けられている。軸受抑え部材２３は、主軸１７の中心軸方向における軸受２１，２２の動きを抑える環状の部材である。軸受抑え部材２３は、たとえば、雌ネジを有するナット部材によって構成される。軸受抑え部材２３をナット部材によって構成する場合は、主軸１７の第２の取り付け面４８に雄ネジ（図示せず）を形成しておき、この雄ネジに軸受抑え部材２３の雌ネジを噛み合わせる。そして、軸受抑え部材２３を所定のトルクで締め付けることにより、軸受２２の内輪に軸受抑え部材２３を押し付ける。これにより、軸受２１，２２は、主軸１７の段差部分４９と軸受抑え部材２３との間に挟み込まれる。このため、主軸１７の中心軸方向における軸受２１，２２の移動を軸受抑え部材２３によって規制することができる。 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. . 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 .
　第１のオイルシール２４および第２のオイルシール２６は、軸受２１，２２に供給される潤滑油の漏れを抑制するシール部材である。 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 .
　第１のオイルシール２４は、主軸１７の外周側に取り付けられている。具体的には、第１のオイルシール２４は、主軸１７の第１の取り付け面４７に取り付けられている。第１のオイルシール２４は、カバー部材３２の取り付け位置側（図３の右側）から見て、軸受２１，２２よりもインナー側（奥側）に配置されている。第１のオイルシール２４は、円環状のシール部材である。第１のオイルシール２４の内周面は、第１の取り付け面４７に密着している。第１のオイルシール２４の外周面は、カラー５７の内周面に密着している。カラー５７は、円環状に形成されている。カラー５７の外周面は、第３の円環部５５の内周面に接触している。 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 .
　一方、第２のオイルシール２６は、主軸１７の内周側に取り付けられている。具体的には、第２のオイルシール２６は、主軸１７の中空部３８ｃに形成された段付き部４１に取り付けられている。第２のオイルシール２６は、カバー部材３２の取り付け位置側（図３の右側）から見て、第１のオイルシール２４よりもアウター側（手前側）に配置されている。アウター側とは、主軸１７の中心軸方向において、主軸１７の端部に近い側を意味し、インナー側とは、主軸１７の端部から遠い側、すなわち主軸１７の長さ方向の中間部に近い側を意味する。第２のオイルシール２６は、円環状のシール部材である。第２のオイルシール２６の外周面は、段付き部４１の内周面に密着している。第２のオイルシール２６の内周面は、後述するカバー部材３２のシール抑え面６３に密着している。第２のオイルシール２６の内径は、第２のオイルシール２６の孔を回転検出器２８が通り抜けられるよう、回転検出器２８の外径よりも大きい。 On the other hand, the second oil seal 26 is attached to the inner peripheral side of the main shaft 17 . Specifically, 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. Means the near side. 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 .
　また、第２のオイルシール２６は、主軸１７の中心軸方向において軸受抑え部材２３の厚み領域に第２のオイルシール２６の厚み領域が重なるように、軸受抑え部材２３の内径側に配置されている。具体的には、図４に示すように、第２のオイルシール２６は、軸受抑え部材２３の厚み領域Ｅ１に対して第２のオイルシール２６の厚み領域Ｅ２が部分的に重なるように、軸受抑え部材２３の内径側に配置されている。軸受抑え部材２３の内径側とは、軸受抑え部材２３の内径を規定する仮想円よりも径方向内側を意味する。なお、第２のオイルシール２６の厚み領域Ｅ２は、軸受抑え部材２３の厚み領域Ｅ１に対して、一部が重なっていてもよいし、全部が重なっていてもよい。 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 . there is Specifically, as shown in FIG. 4 , 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 . Note that 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 .
　回転検出器２８は、主軸１７の中空部３８ｂに配置されている。回転検出器２８は、たとえば、ロータリーエンコーダによって構成される。回転検出器２８の外径は、中空部３８ｂの内径よりも小さく、これらの寸法差を利用して回転検出器２８が中空部３８ｂに収容されている。回転検出器２８の外径とは、円筒形をなす回転検出器２８の本体部分の外径、すなわち回転検出器２８の最大径を意味する。回転検出器２８は、軸部２８ａを有する。回転検出器２８の本体部分には、軸部２８ａの回転を検出する検出部（図示せず）が内蔵されている。軸部２８ａは、回転検出器２８の本体部分から突き出している。回転検出器２８の本体部分には、図示しないケーブルが接続されている。回転検出器２８のケーブルは、主軸１７の中空部３８ａを通して巻上機１４の外側に引き出される。このケーブルは、回転検出器２８に電力を供給したり、回転検出器２８の出力信号を取り出したりするためのケーブルである。 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 .
　支持体３０は、回転検出器２８を弾性的に支持するために、たとえば板バネによって構成される。主軸１７の中心軸と直交する方向（径方向）における支持体３０の最大寸法は、第２のオイルシール２６の孔を支持体３０が通り抜けられるよう、第２のオイルシール２６の内径よりも小さいことが好ましい。支持体３０には、回転検出器２８の軸部２８ａを通す孔（図示せず）が設けられている。この孔は、軸部２８ａと支持体３０との干渉を避けるために形成されている。支持体３０の一部は、回転検出器２８の本体部分の端面に固定されている。また、支持体３０の他の部分は、主軸１７の中空部３８ｃに形成された端面４０に複数のネジ５８によって固定されている。支持体３０には、ネジ５８の雄ネジ部分を通すための固定用孔（図示せず）が設けられている。固定用孔は、前述したネジ孔を利用して支持体３０を筐体１５に固定するための孔である。中空部３８ｃの端面４０に支持体３０を固定する場合は、上述した固定用孔とネジ孔とを位置合わせした状態で、ネジ５８の雄ネジ部分を端面４０のネジ孔に噛み合わせ、その状態でネジ５８を締め付ける。これにより、中空部３８ｃの端面４０に支持体３０を固定することができる。 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 . Other parts of the support 30 are 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. When the support 30 is fixed to the end surface 40 of the hollow portion 38c, the male screw portion of the screw 58 is engaged with the screw hole of the end surface 40 while the fixing hole and the screw hole are aligned. Tighten the screw 58 with . Thereby, the support 30 can be fixed to the end surface 40 of the hollow portion 38c.
　カバー部材３２は、回転検出器２８が配置される主軸１７の中空部３８ｂを外部から遮蔽するようにロータ５２に取り付けられている。カバー部材３２は、たとえば炭素鋼によって構成されるもので、図示しないボルト等を用いて第３の円環部５５の端面に固定されている。このため、カバー部材３２は、綱車１６およびロータ５２と一体に回転する。カバー部材３２は、円板状の部材である。カバー部材３２の中心部にはジョイント部６０が設けられている。ジョイント部６０は、回転検出器２８の軸部２８ａに連結されている。このため、カバー部材３２がロータ５２と一体に回転すると、回転検出器２８の軸部２８ａがカバー部材３２と一体に回転する。つまり、カバー部材３２は、ロータ５２の回転を回転検出器２８の軸部２８ａに伝達する機能を果たす。また、カバー部材３２は、塵や埃などが主軸１７の中空部３８内に侵入することを抑制する機能を果たす。 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 shaft 17 .
　カバー部材３２には、複数（図例では２つ）の通し孔６２が設けられている。通し孔６２は、上述したネジ５８を廻すための工具を挿入するための孔である。工具としては、たとえば、ネジ５８を締め付けたり緩めたりするために使用されるドライバーが考えられる。通し孔６２は、中空部３８ｃの端面４０に形成されたネジ孔（図示せず）に対し、上記工具を用いてネジ５８の締め付け作業が行える位置に配置されている。通し孔６２の内径は、ネジ５８が通し孔６２を通り抜けられるよう、ネジ５８の頭部の外径よりも大きいことが好ましい。また、カバー部材３２には、シール抑え面６３が設けられている。シール抑え面６３は、カバー部材３２の径方向において通し孔６２の位置よりも外側に形成されている。第２のオイルシール２６の内周面は、シール抑え面６３に対して摺動自在に接触している。また、第２のオイルシール２６の内周面は、シール抑え面６３に密着している。これにより、第１のオイルシール２４から第２のオイルシール２６までの空間は、主軸１７、ロータ５２およびカバー部材３２によって密閉された空間となっており、この密閉空間に軸受２１，２２および軸受抑え部材２３が配置されている。 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 . Further, 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 . Also, the inner peripheral surface of the second oil seal 26 is in close contact with the seal restraining surface 63 . As a result, 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.
　上記構成からなる巻上機１４においては、ステータ５０のコイルに電流が流れることにより、ロータ５２が回転する。このとき、綱車１６およびカバー部材３２は、ロータ５２と一体に回転する。また、ロータ５２の回転は、カバー部材３２によって回転検出器２８の軸部２８ａに伝達される。このため、回転検出器２８の軸部２８ａは、綱車１６およびロータ５２と一体に回転する。したがって、綱車１６の回転を回転検出器２８によって検出することができる。回転検出器２８が検出する綱車１６の回転には、綱車１６の回転速度、回転方向、回転量などが含まれる。 In the hoisting machine 14 having the above configuration, the rotor 52 rotates due to the current flowing through the coils of the stator 50 . At this time, the sheave 16 and the cover member 32 rotate integrally with the rotor 52 . Also, 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 .
　図５は、参考形態に係る巻上機の構成例を示す断面図である。なお、参考形態に係る巻上機と上記実施形態に係る巻上機１４との比較を容易にするために、参考形態に係る巻上機の各構成要素に対しては、上記実施形態に係る巻上機１４の各構成要素に付した符号に「Ａ」の文字を追加することにより、構成要素間の対応関係を明確にする。また、参考形態に係る巻上機が有する構成要素のうち、一部の構成要素の符号を省略するとともに、上記実施形態に係る巻上機１４が有しない構成要素には新たな符号を付す。 FIG. 5 is a cross-sectional view showing a configuration example of a hoist according to the reference embodiment. In order to facilitate comparison between the hoist according to the reference embodiment and the hoist 14 according to the above embodiment, each component of the hoist according to the reference embodiment is replaced with the hoist according to the above embodiment. By adding the letter "A" to the reference numerals attached to the components of the hoisting machine 14, the correspondence between the components is clarified. Further, among the constituent elements of the hoisting machine according to the reference embodiment, 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.
　図５に示すように、巻上機１４Ａは、筐体１５Ａと、綱車１６Ａと、主軸１７Ａと、電動機１８Ａと、軸受２１Ａ，２２Ａと、軸受抑え部材２３Ａと、第１のオイルシール２４Ａと、第２のオイルシール２６Ａと、回転検出器２８Ａと、支持体３０Ａと、カバー部材３２Ａと、カラー５７Ａと、を備えている。電動機１８Ａは、ステータ５０Ａおよびロータ５２Ａを有する。また、巻上機１４Ａは、カラー７１と、カラー７２と、を備えている。 As shown in FIG. 5, 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 .
　第２のオイルシール２６Ａは、主軸１７Ａの外周側に取り付けられている。また、第２のオイルシール２６Ａは、第１のオイルシール２４Ａ、軸受２１Ａ，２２Ａおよび軸受抑え部材２３Ａと共に、主軸１７Ａの中心軸方向に直列に配置されている。このように、第１のオイルシール２４、軸受２１Ａ，２２Ａ、軸受抑え部材２３Ａおよび第２のオイルシール２６Ａを、主軸１７Ａの外周側に直列に配置した場合は、主軸１７Ａの中心軸方向における巻上機１４Ａの寸法、すなわち巻上機１４Ａの厚み寸法が大きくなってしまう。また、第１のオイルシール２４、軸受２１Ａ，２２Ａ、軸受抑え部材２３Ａ、第２のオイルシール２６Ａなどの部品は規格で寸法が定められているため、巻上機１４Ａの更なる薄型化を図ることは難しい。 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. Thus, when 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. In addition, since the dimensions of parts such as the first oil seal 24, the bearings 21A and 22A, the bearing restraining member 23A, and the second oil seal 26A are defined by standards, the hoist 14A can be further thinned. It is difficult.
　一方、上記実施形態に係る巻上機１４では、第２のオイルシール２６が主軸１７の内周側に取り付けられている。これにより、主軸１７の外周側に直列に配置される部品の数を減らすことができる。したがって、巻上機１４の更なる薄型化を図ることができる。また、第２のオイルシール２６を主軸１７の内周側に配置すれば、参考形態に係る巻上機１４Ａと比べて、部品点数を減らすことができる。その理由は次のとおりである。 On the other hand, in the hoist 14 according to the above embodiment, the second oil seal 26 is attached to the inner peripheral side of the main shaft 17 . Thereby, 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. Also, 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.
　参考形態に係る巻上機１４Ａでは、主軸１７Ａの外周面の端部付近に、ナット部材からなる軸受抑え部材２３Ａを取り付けるための雄ネジが形成されている。雄ネジが形成されている部分には、第２のオイルシール２６Ａを直接取り付けることができない。このため、参考形態に係る巻上機１４Ａでは、第２のオイルシール２６Ａがカラー７１を介して主軸１７Ａに取り付けられている。また、オイルシールのリップ面（摺動する面）が接する相手側の素材は炭素鋼であることが推奨されている。これに対し、電動機１８Ａのロータ５２Ａは鋳鉄で構成されている。このため、参考形態に係る巻上機１４Ａでは、第２のオイルシール２６Ａの外周面が接する相手側の素材が炭素鋼となるように、炭素鋼製のカラー７２を取り付けている。この点は、カラー５７Ａについても同様である。
　これに対し、上記実施形態に係る巻上機１４では、軸受抑え部材２３の取り付け位置と干渉しない主軸１７の内周側に第２のオイルシール２６を取り付けている。このため、主軸１７にカラーを介することなく直接、第２のオイルシール２６を取り付けることができる。よって、カラー７１は不要である。また、第２のオイルシール２６の外周面は、鋳鉄製のロータ５２に接することがない。よって、カラー７２も不要である。
　以上の理由により、上記実施形態に係る巻上機１４においては、上記参考形態に係る巻上機１４Ａと比べて、部品点数を減らすことができる。 In the hoist 14A according to the reference embodiment, 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. On the other hand, the rotor 52A of the electric motor 18A is made of cast iron. For this reason, in the hoisting machine 14A according to the reference embodiment, 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. This point also applies to the collar 57A.
On the other hand, in the hoist 14 according to the above embodiment, 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.
For the reasons described above, 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.
　また、上記実施形態に係る巻上機１４において、第２のオイルシール２６は、主軸１７の中心軸方向において軸受抑え部材２３の厚み領域Ｅ１に第２のオイルシール２６の厚み領域Ｅ２が重なるように、軸受抑え部材２３の内径側に配置されている。これにより、主軸１７の中心軸方向において、軸受抑え部材２３の厚み領域Ｅ１を、第２のオイルシール２６を取り付けるための領域に利用することができる。 Further, in the hoist 14 according to the above-described 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 . In addition, it is arranged on the inner diameter side of the bearing suppressing member 23 . Thereby, in the direction of the center axis of the main shaft 17, the thickness region E1 of the bearing restraining member 23 can be used as a region for attaching the second oil seal 26. As shown in FIG.
　また、上記実施形態に係る巻上機１４において、第２のオイルシール２６の内径は、回転検出器２８の外径よりも大きいため、回転検出器２８の着脱に際して、第２のオイルシール２６と回転検出器２８との干渉を避けることができる。これにより、たとえば回転検出器２８の故障などによって回転検出器２８を交換する場合に、第２のオイルシール２６を取り付けたままで、回転検出器２８の交換を行うことができる。このため、回転検出器２８の交換時に、第２のオイルシール２６の脱着が不要になる。 Further, in the hoisting machine 14 according to the above-described embodiment, 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.
　また、上記実施形態に係る巻上機１４において、支持体３０はネジ５８によって主軸１７に固定され、カバー部材３２には、そのネジ５８を廻すための工具を挿入可能な通し孔６２が設けられている。このため、カバー部材３２をロータ５２に取り付けた後に、ドライバーなどの工具を通し孔６２に挿入して、ネジ５８を締め付け方向に廻すことにより、支持体３０を主軸１７に固定することができる。 Further, in the hoist 14 according to the above embodiment, 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.
　また、上記実施形態に係る巻上機１４において、主軸１７の中心軸と直交する方向における支持体３０の最大寸法は、第２のオイルシール２６の内径よりも小さいため、回転検出器２８に支持体３０を取り付けたままで、回転検出器２８の着脱作業を実施することができる。 Further, in the hoisting machine 14 according to the above-described embodiment, 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.
　また、上記実施形態に係る巻上機１４において、カバー部材３２に設けられた通し孔６２の内径は、ネジ５８の頭部の外径よりも大きいため、カバー部材３２をロータ５２に取り付けた後でも、通し孔６２に工具と共にネジ５８を差し込んで、支持体３０を主軸１７に固定することができる。 Further, in the hoist 14 according to the above-described embodiment, 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.
　＜変形例等＞
　なお、本発明は、上述した実施形態に限定されるものではなく、様々な変形例を含む。たとえば、上述した実施形態では、本発明の内容を理解しやすいように詳細に説明しているが、本発明は、上述した実施形態で説明したすべての構成を必ずしも備えるものに限定されない。また、ある実施形態の構成の一部を、他の実施形態の構成に置き換えることが可能である。また、ある実施形態の構成に他の実施形態の構成を加えることも可能である。また、各実施形態の構成の一部について、これを削除し、または他の構成を追加し、あるいは他の構成に置換することも可能である。 <Modifications, etc.>
In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, in the above-described embodiments, 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. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is also possible to delete a part of the configuration of each embodiment, add another configuration, or replace it with another configuration.
　たとえば、上記実施形態においては、軸受抑え部材２３の厚み領域Ｅ１と第２のオイルシール２６の厚み領域Ｅ２とが重なるように、軸受抑え部材２３の内径側に第２のオイルシール２６を配置しているが、これに限らない。たとえば、他の実施形態として、図６に示すように、第２のオイルシール２６は、主軸１７の中心軸方向において軸受２１，２２の厚み領域Ｅ３に第２のオイルシール２６の厚み領域Ｅ２が重なるように、軸受２１，２２の内径側に配置してもよい。これにより、主軸１７の中心軸方向において、軸受２１，２２の厚み領域Ｅ３を、第２のオイルシール２６を取り付けるための領域に利用することができる。なお、第２のオイルシール２６の厚み領域Ｅ２は、軸受２１，２２の厚み領域Ｅ３に対して、一部が重なっていてもよいし、全部が重なっていてもよい。 For example, in the above 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. but not limited to this. For example, as another embodiment, as shown in FIG. They may be arranged on the inner diameter side of the bearings 21 and 22 so as to overlap. Thereby, in the central axis direction of the main shaft 17, the thickness region E3 of the bearings 21 and 22 can be used as a region for attaching the second oil seal 26. As shown in FIG. Note that 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 .
　１０…エレベーター、１１…昇降路、１２…乗りかご、１４…巻上機、１６…綱車、１７…主軸、２１，２２…軸受、２３…軸受抑え部材、２４…第１のオイルシール、２６…第２のオイルシール、２８…回転検出器、２８ａ…軸部、３０…支持体、カバー部材、３８…中空部、５２…ロータ、５８…ネジ、６２…通し孔、Ｅ１…軸受抑え部材の厚み領域、Ｅ２…第２のオイルシールの厚み領域、Ｅ３…軸受の厚み領域 DESCRIPTION OF SYMBOLS 10... Elevator, 11... Hoistway, 12... Car, 14... Winding machine, 16... Sheave, 17... Main shaft, 21, 22... Bearing, 23... Bearing suppressing member, 24... First oil seal, 26 Second oil seal 28 Rotation detector 28a Shaft 30 Support, cover member 38 Hollow portion 52 Rotor 58 Screw 62 Through hole E1 Bearing holding member Thickness region, E2: Thickness region of the second oil seal, E3: Thickness region of the bearing

Claims (8)

  1. 　中空状の主軸と、
    　前記主軸の外周側に取り付けられた軸受と、
    　前記主軸に前記軸受を介して回転可能に支持される綱車と、
    　前記主軸の中心軸方向においてインナー側に配置される第１のオイルシールおよびアウター側に配置される第２のオイルシールと、を備え、
    　前記第２のオイルシールは、前記主軸の内周側に取り付けられている
    　巻上機。     a hollow main shaft;
    a bearing attached to the outer peripheral side of the main shaft;
    a sheave rotatably supported by the main shaft via the bearing;
    a first oil seal arranged on the inner side and a second oil seal arranged on the outer side in the central axis direction of the main shaft;
    The hoisting machine, wherein the second oil seal is attached to the inner peripheral side of the main shaft.
  2. 　前記主軸の外周側に取り付けられた環状の軸受抑え部材をさらに備え、
    　前記第２のオイルシールは、前記主軸の中心軸方向において前記軸受抑え部材の厚み領域に前記第２のオイルシールの厚み領域の少なくとも一部が重なるように、前記軸受抑え部材の内径側に配置されている
    　請求項１に記載の巻上機。     further comprising an annular bearing suppressing member attached to the outer peripheral side of the main shaft;
    The second oil seal is arranged on the inner diameter side of the bearing restraining member such that at least a part of the thickness region of the second oil seal overlaps with the thickness region of the bearing restraining member in the central axis direction of the main shaft. The hoisting machine according to claim 1.
  3. 　前記第２のオイルシールは、前記主軸の中心軸方向において前記軸受の厚み領域に前記第２のオイルシールの厚み領域の少なくとも一部が重なるように、前記軸受の内径側に配置されている
    　請求項１に記載の巻上機。     The second oil seal is arranged on the inner diameter side of the bearing so that at least a part of the thickness region of the second oil seal overlaps with the thickness region of the bearing in the central axis direction of the main shaft. Item 1. The hoist according to item 1.
  4. 　前記主軸の中空部に配置されて前記綱車の回転を検出する回転検出器をさらに備え、
    　前記第２のオイルシールの内径は、前記回転検出器の外径よりも大きい
    　請求項１に記載の巻上機。     further comprising a rotation detector disposed in the hollow portion of the main shaft and detecting rotation of the sheave;
    The hoisting machine according to claim 1, wherein the inner diameter of the second oil seal is larger than the outer diameter of the rotation detector.
  5. 　前記主軸にネジによって固定され、前記回転検出器を支持する支持体と、
    　前記綱車と一体に回転するロータと、
    　前記回転検出器が配置される前記主軸の中空部を外部から遮蔽するように前記ロータに取り付けられ、前記ロータの回転を前記回転検出器の軸部に伝達するカバー部材と、をさらに備え、
    　前記カバー部材には、前記ネジを廻すための工具を挿入可能な通し孔が設けられている
    　請求項４に記載の巻上機。     a support fixed to the main shaft by a screw and supporting the rotation detector;
    a rotor that rotates integrally with the sheave;
    a cover member attached to the rotor so as to shield the hollow portion of the main shaft where the rotation detector is arranged from the outside, and transmitting the rotation of the rotor to the shaft portion of the rotation detector;
    The hoisting machine according to claim 4, wherein the cover member is provided with a through hole into which a tool for turning the screw can be inserted.
  6. 　前記主軸の中心軸と直交する方向における前記支持体の最大寸法は、前記第２のオイルシールの内径よりも小さい
    　請求項５に記載の巻上機。     The hoisting machine according to claim 5, wherein the maximum dimension of the support in a direction perpendicular to the central axis of the main shaft is smaller than the inner diameter of the second oil seal.
  7. 　前記通し孔の内径は、前記ネジの頭部の外径よりも大きい
    　請求項５に記載の巻上機。     The hoist according to claim 5, wherein the inner diameter of the through hole is larger than the outer diameter of the head of the screw.
  8. 　昇降路内に配置される乗りかごと、
    　前記乗りかごを昇降させる巻上機と、を備え、
    　前記巻上機は、
    　中空状の主軸と、
    　前記主軸の外周側に取り付けられた軸受と、
    　前記主軸に前記軸受を介して回転可能に支持される綱車と、
    　前記主軸の中心軸方向においてインナー側に配置される第１のオイルシールおよびアウター側に配置される第２のオイルシールと、を備え、
    　前記第２のオイルシールは、前記主軸の内周側に取り付けられている
    　エレベーター。     a car positioned within the hoistway;
    A hoisting machine that raises and lowers the car,
    The hoist is
    a hollow main shaft;
    a bearing attached to the outer peripheral side of the main shaft;
    a sheave rotatably supported by the main shaft via the bearing;
    a first oil seal arranged on the inner side and a second oil seal arranged on the outer side in the central axis direction of the main shaft;
    A said 2nd oil seal is attached to the inner peripheral side of the said main shaft. Elevator.
PCT/JP2021/031302 2021-08-26 2021-08-26 Winding machine and elevator WO2023026424A1 (en)

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CN202180101609.6A CN117836231A (en) 2021-08-26 2021-08-26 Traction machine and elevator

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015125266A1 (en) * 2014-02-21 2015-08-27 株式会社日立製作所 Elevator device
JP2016036890A (en) * 2014-08-11 2016-03-22 株式会社日立製作所 Seal replacing method and seal replacing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015125266A1 (en) * 2014-02-21 2015-08-27 株式会社日立製作所 Elevator device
JP2016036890A (en) * 2014-08-11 2016-03-22 株式会社日立製作所 Seal replacing method and seal replacing device

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