WO2021161640A1

WO2021161640A1 - Hoisting machine

Info

Publication number: WO2021161640A1
Application number: PCT/JP2020/046176
Authority: WO
Inventors: 一輝長岐; 祥子諏訪園; 大西　貴之
Original assignee: 株式会社明電舎
Priority date: 2020-02-14
Filing date: 2020-12-10
Publication date: 2021-08-19
Also published as: CN115052829B; CN115052829A; JP6915711B1; JP2021127224A

Abstract

The present invention relates to a hoisting machine, and particularly to a hoisting machine used in an elevator. The purpose of the present invention is to provide a hoisting machine in which oil can be kept away from a brake disc irrespective of installation orientation. A hoisting machine (1) comprises a shaft (22) which is positioned along a center shaft and which rotates a sheave (20), a brake disc (31) fixed to the sheave (20), a bearing (41) for rotatably supporting the shaft (22) on one axial side of the sheave (20), a pedestal member (60) for covering the radial outside of the bearing (41) over the entire circumferential periphery thereof, and a lid member (70) which is fixed to the other axial side of the pedestal member (60) and which covers the other axial side of the bearing (41), the lid member (70) having an oil guiding part (90) for guiding oil, which leaks from the other axial side of the bearing (41), in the direction away from the brake disc (31).

Description

Hoisting machine

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

The hoisting machine, for example, in an elevator, winds up a rope that connects a basket and a balance weight. The sheave that winds up the rope in the hoisting machine is rotationally driven by, for example, a motor. A brake disc is fixed to the sheave, and the sheave is braked by the frictional force when the brake pad is pressed against the braking surface of the brake disc.

The sheave is fixed to a shaft that transmits the rotation of the motor, and the shaft is rotatably supported by bearings. The bearing that supports the shaft contains oil for lubrication, but if this oil adheres to the braking surface of the brake disc, friction may be reduced and braking may not be effective.

Therefore, conventionally, it has been proposed to guide the oil leaking from the bearing in the direction away from the brake disc. In Patent Document 1, a structure in which a bearing is held from the radial outside by a casing accommodating a motor for rotating a shaft, and oil leaking from a side close to the brake disc of the bearing is guided in a direction away from the brake disc by a hole provided in the casing. Is disclosed.

Japanese Unexamined Patent Publication No. 2015-89847

Patent Document 1 has a structure in which oil leaking from a bearing flows down into a hole provided in a casing due to its own weight, and the hoisting machine is installed so that the hole provided in the casing is on the lower side in the vertical direction of the shaft. It is assumed.

However, recently, the installation form of the hoisting machine has been diversified, and it is conceivable that the hole provided in the casing is installed so that it does not come to the lower side in the vertical direction of the shaft. In this case, it was necessary to separately provide a structure for guiding the oil away from the brake disc so that the oil would not flow into the holes provided in the casing.

An object of the present invention is to provide a hoisting machine capable of keeping oil away from a brake disc regardless of the installation orientation.

The hoisting machine according to one aspect of the present invention is an elevator hoisting machine that has a bearing around which a rope connecting a cage and a balance weight is wound, and rotates the sheave to wind the rope, and is a hoisting machine along a central axis. A shaft that rotates the sheave, a brake disc fixed to the sheave, a bearing that rotatably supports the shaft on one side in the axial direction of the sheave, and a circumferential outer circumference of the bearing. A pedestal member that covers the entire circumference in the direction and a lid member that is fixed to the other side in the axial direction of the pedestal member and covers the other side in the axial direction of the bearing are provided, and the lid member is provided in the axial direction of the bearing. It has an oil guiding portion that guides oil leaking from the other side in a direction away from the brake disc.

In the hoisting machine of the above aspect, the oil guiding portion has an oil passage extending radially outward from an opening radially outer of the shaft and then extending in a direction away from the brake disc, and the lid. The member may be fixed to the pedestal member so that the opening is located below the shaft in the vertical direction.

In the hoisting machine of the above aspect, the hoisting machine further has a leg portion for fixing the sheave to an external fixed surface, and the lid member has an angle formed by the fixed surface of the leg portion in contact with the fixed surface in the vertical direction. It may be fixed to the pedestal member at a position corresponding to the above.

In the hoisting machine of the above aspect, the shaft may further have a sealing member that penetrates the lid member and seals between the shaft and the lid member.

In the hoisting machine of the above aspect, the shaft has a convex portion that protrudes radially outward over the entire circumference in the circumferential direction on the other side in the axial direction from the seal member, and the opening is formed. It may be located on the outer side in the radial direction of the convex portion and may face the convex portion in the radial direction.

In the hoisting machine of the above aspect, the lid member is a first lid member, and is further provided with a second lid member which is fixed to one side in the axial direction of the pedestal member and covers one side in the axial direction of the bearing. You may.

In the hoisting machine of the above aspect, the bearing is a first bearing, and may further have a second bearing that rotatably supports the shaft on the other side in the axial direction of the sheave.

The hoisting machine of the above aspect may further have a motor for rotationally driving the shaft.

According to one aspect of the present invention, it is possible to provide a hoisting machine capable of keeping oil away from the brake disc regardless of the installation orientation.

It is a perspective view of the hoisting machine which concerns on 1st Embodiment of this invention. FIG. 5 is a side view of the hoisting machine 1 of FIG. 1 as viewed from the + X side. FIG. 5 is a side sectional view showing the hoisting machine 1 of FIG. 2 cut along a plane orthogonal to the X axis and passing through the central axis A. It is a perspective view which shows the braking device 30 and the 1st bearing part 40 in the hoisting machine 1 of FIG. It is a perspective view which shows the 1st bearing part 40 of the hoisting machine 1 of FIG. It is a perspective view which shows the 1st pedestal member 60 of the hoisting machine 1 of FIG. It is a side sectional view which shows the 1st lid member 70 of the figure in an enlarged manner. It is a side cross-sectional view which shows the part pointed by the arrow B shown in FIG. 3 in an enlarged manner.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiment, in order to make the explanation easy to understand, the structures and elements other than the main part of the present invention will be described in a simplified or omitted manner. Further, in the drawings, the same elements are designated by the same reference numerals. It should be noted that the shapes, dimensions, etc. of each element shown in the drawings are schematically shown, and do not indicate the actual shapes, dimensions, etc.

In the following description, the direction in which the central axis A shown in FIG. 3 extends is simply referred to as the "axial direction", the radial direction centered on the central axis A is simply referred to as the "diametric direction", and the central axis A is the center. The circumferential direction is simply called the "circumferential direction". Further, in the axial direction, the right side in FIG. 3 is referred to as one side, and the left side in FIG. 3 is referred to as the other side. Further, in the radial direction, the side closer to the central axis A is referred to as the inner side, and the side far from the central axis A is referred to as the outer side.

Further, in the drawings, the XYZ coordinate system is shown as a three-dimensional Cartesian coordinate system as appropriate. In the XYZ coordinate system, the Y-axis direction is a direction parallel to the central axis A and is a left-right direction in the side view shown in FIG. The Z-axis direction is a direction orthogonal to the Y-axis direction, and is the vertical direction of the side view shown in FIG. The X-axis direction is a direction orthogonal to the Y-axis direction and the Z-axis direction. In any of the X-axis direction, the Y-axis direction, and the Z-axis direction, the side facing the arrow shown in the figure is the + side, and the opposite side is the-side.

Further, in the following description, "extending in the axial direction" means not only extending in the strict axial direction (Y-axis direction) but also extending in a direction tilted within a range of less than 45 ° with respect to the axial direction. include. Further, in the following description, extending in the radial direction means that the extension is strictly in the radial direction, that is, in the direction perpendicular to the axial direction (Y-axis direction), and 45 ° with respect to the radial direction. Including the case where it extends in a tilted direction within a range of less than.

<First Embodiment>
FIG. 1 is a perspective view of a hoist according to the first embodiment of the present invention. The present embodiment is an example in which the present invention is applied to a hoisting machine that winds up a rope connecting an elevator cage and a balancing weight. The present invention can also be applied to other than elevator hoisting machines. The hoisting machine 1 of FIG. 1 has a sheave 20 around which a rope to be wound is wound. FIG. 2 is a side view of the hoisting machine 1 of FIG. 1 as viewed from the + X side. FIG. 3 is a side sectional view showing the hoisting machine 1 of FIG. 2 cut along a plane orthogonal to the X axis and passing through the central axis A. FIG. 3 shows a case where the fixed surface 100a of the leg portion 100 in contact with the fixed surface 201 of the base member 200 is orthogonal to the vertical direction.

In addition to the sheave 20, the hoisting machine 1 includes a motor 10 that generates a driving force for rotating the sheave 20 with the central axis A as a rotation axis, and a shaft 22 that transmits the driving force generated by the motor 10 to the sheave 20. A second bearing portion 50 having a second bearing 51 that rotatably supports the shaft 22 on the other side of the sheave 20 in the axial direction, and a shaft support that rotatably supports the shaft 22 on one side of the sheave 20 in the axial direction. A first bearing portion 40 having a first bearing 41 to be provided, and a braking device 30 for braking the rotation of the sheave 20 are provided. As the first bearing 41 and the second bearing 51, for example, self-aligning roller bearings can be used. In FIG. 3, the details of the internal configurations of the first bearing 41 and the second bearing 51 are not shown. As the first bearing 41 and the second bearing 51, other known types of bearings may be used. The second bearing 51 may be arranged on the other side in the axial direction from the motor 10.

The motor 10 includes a stator 11, a rotor 12, and a casing 13. The motor 10 is arranged on the other side in the axial direction from the sheave 20. The casing 13 has legs 102. The legs 102 are fixed to the base member 200 by, for example, bolts. At this time, the fixed surface 102a of the leg portion 102 is in contact with the fixed surface 201 of the base member 200. The casing 13 houses the stator 11 and the rotor 12. The stator 11 is fixed to the casing 13. The rotor 12 is arranged with a gap between it and the stator 11. The first diameter portion 22a, which is the other end of the shaft 22 in the axial direction, is fixed to the rotor 12 by, for example, press fitting. The first diameter portion 22a is a portion extending over the entire circumference of the shaft 22 in the circumferential direction. The motor 10 rotates the rotor 12 with the central axis A as the rotation axis by energization. The shaft 22 rotates with the central axis A as the rotation axis as the rotor 12 rotates. The shaft 22 may be rotated by a drive device other than a motor, such as an engine.

The second bearing portion 50 is fixed to one side in the axial direction of the second pedestal member 54 that covers the radial outer side of the second bearing 51 over the entire circumference in the circumferential direction, and the second bearing 51. A third lid member 53 that covers one side in the axial direction and a fourth lid member 52 that is fixed to the other side in the axial direction of the second pedestal member 54 and covers the other side in the axial direction of the second bearing 51 are provided. The radial outer side of the second bearing 51 is fixed to the second pedestal member 54. The second diameter portion 22b of the shaft 22, which is one side in the axial direction from the first diameter portion 22a, is fixed to the inside of the second bearing 51 in the radial direction by, for example, press fitting. The second diameter portion 22b is a portion extending over the entire circumference of the shaft 22 in the circumferential direction. The second pedestal member 54 has legs 101. The leg 101 is fixed to the base member 200 by, for example, a bolt. At this time, the fixed surface 101a of the leg 101 is in contact with the fixed surface 201 of the base member 200.

The first bearing portion 40 is fixed to the first pedestal member 60 that covers the radial outer side of the first bearing 41 over the entire circumference in the circumferential direction and the other side in the axial direction of the first pedestal member 60, and is fixed to the first bearing 41. It includes a first lid member 70 that covers the other side in the axial direction, and a second lid member 80 that is fixed to one side in the axial direction of the first pedestal member 60 and covers one side in the axial direction of the first bearing 41. The radial outer side of the first bearing 41 is fixed to the first pedestal member 60. The fourth diameter portion 22e, which is one end of the shaft 22 on one side in the axial direction, is fixed to the inside of the first bearing 41 in the radial direction by, for example, press fitting. The fourth diameter portion 22e is a portion extending over the entire circumference of the shaft 22 in the circumferential direction. The first pedestal member 60 has legs 100. The leg portion 100 is fixed to the base member 200 by, for example, a bolt. At this time, the fixed surface 100a of the leg portion 100 is in contact with the fixed surface 201 of the base member 200.

The base member 200 is an external member of the hoisting machine 1. The base member 200 is fixed to, for example, the floor, side wall or ceiling of the elevator machine room. Therefore, when the hoisting machine 1 is installed in the elevator usage environment, the circumferential positions of the

legs

100, 101, and 102 are not always in the vertical direction. Although details will be described later, in the present embodiment, when the first lid member 70 is fixed to the first pedestal member 60, the circumferential position of the first lid member 70 is set to an angle formed by the fixed surface 100a in the vertical direction. It can be set according to the position. In the present embodiment, the circumferential positions of the

legs

100, 101, and 102 can be arranged in different directions. The circumferential positions of the

legs

100, 101, and 102 may all be arranged in the same direction. Further, a leg portion common to all of the motor 10, the second bearing portion 50, and the first bearing 41 may be provided.

The sheave 20 is fixed to the third diameter portion 22c of the shaft 22 which is one side in the axial direction from the second diameter portion 22b by, for example, press fitting. The third diameter portion 22c is located on the other side in the axial direction with respect to the fourth diameter portion 22e. The third diameter portion 22c is a portion extending over the entire circumference of the shaft 22 in the circumferential direction. The sheave 20 is fixed to the shaft 22 at a position where it does not come into contact with the third lid member 53. The first diameter portion 22a has a smaller diameter than the second diameter portion 22b. The second diameter portion 22b has a smaller diameter than the third diameter portion 22c. The fourth diameter portion 22e has a smaller diameter than the third diameter portion 22c.

The sheave 20 has a cylindrical rope winding portion 21 having a through hole penetrating in the axial direction. The rope winding portion 21 has a rope winding surface 21a on its outer peripheral surface. The hoisting machine 1 winds the rope by friction between the rope and the rope winding surface 21a. The sheave 20 does not come into contact with the first pedestal member 60.

The braking device 30 includes a brake disc 31 and a brake clamper 32 that presses a brake pad against the braking surface of the brake disc 31 to brake by friction. The braking surface of the brake disc 31 is located radially outside the oil receiving portion 22d of the shaft 22. The oil receiving portion 22d is a portion extending over the entire circumference of the shaft 22 in the circumferential direction. The axial position of the braking surface of the brake disc 31 substantially coincides with the axial position of the oil receiving portion 22d. The oil receiving portion 22d is located on one side in the axial direction with respect to the third diameter portion 22c. The oil receiving portion 22d is located on the other side in the axial direction from the fourth diameter portion 22e.

FIG. 4 is a perspective view showing the braking device 30 and the first bearing portion 40 of the hoisting machine 1 of FIG. The brake disc 31 is a disk-shaped member having a braking surface that extends in a direction orthogonal to the axial direction. The brake disc 31 has a through hole through which the shaft 22 penetrates, and is fixed to the end surface of the sheave 20 on one side in the axial direction by a fixing portion 31a. The fixing portion 31a is, for example, a bolt. The brake disc 31 rotates around the central axis A as the sheave 20 rotates. The brake clamper 32 can brake the rotation of the sheave 20 by pressing the brake pad against the braking surface of the brake disc 31.

FIG. 5 is a perspective view showing the first bearing portion 40 of the hoisting machine 1 of FIG. FIG. 6 is a perspective view showing the first pedestal member 60 of the hoisting machine 1 of FIG. The brake disc 31 does not come into contact with the first pedestal member 60 and the first lid member 70. The first pedestal member 60 has a bearing accommodating portion 65 accommodating the first bearing 41 and a plate-shaped portion 64 extending radially outward from the bearing accommodating portion 65. The bearing accommodating portion 65 has an accommodating hole 62 for accommodating the first bearing 41. The accommodating hole 62 penetrates in the axial direction. The bearing accommodating portion 65 covers the radial outer side of the first bearing 41 over the entire circumference in the circumferential direction. The plate-shaped portion 64 has a recess 61 that is recessed inward in the radial direction at the outer peripheral position. The recesses 61 are provided at four locations in the circumferential direction of the plate-shaped portion 64. The brake clamper 32 fits into the recess 61 and is fixed to the plate-shaped portion 64 by, for example, a bolt.

The bearing accommodating portion 65 has a surface 65a which is an end surface on the other side in the axial direction. The first lid member 70 is fixed to the surface 65a in a state where the first bearing 41 is housed in the bearing housing portion 65. The first lid member 70 is fixed by, for example, a bolt so that the fixing portion 71 of the first lid member 70 and the fixing portion 63 of the bearing accommodating portion 65 are aligned in the circumferential direction. The fixing portion 71 is, for example, a through hole. The fixing portion 71 may be a hole whose other side in the axial direction is closed. The fixing portion 63 is, for example, a through hole. The fixing portion 63 may be a hole that is closed on one side in the axial direction. The first lid member 70 has eight fixing portions 71 at equal intervals in the circumferential direction. Each of the plurality of fixing portions 71 forms an angle of 45 degrees around the axis with the adjacent fixing portion 71. The number of fixed portions 71 may be other than eight. The bearing accommodating portion 65 has eight fixing portions 63 at equal intervals in the circumferential direction. Each of the plurality of fixing portions 63 forms an angle of 45 degrees around the axis with the adjacent fixing portion 63. The number of fixed portions 71 may be other than eight. In the present embodiment, the number of fixed portions 71 is the same as that of the fixed portions 63. The number of fixed portions 71 may be different from that of the fixed portions 63. The first lid member 70 is arranged coaxially with the central axis A, and the position in the circumferential direction can be adjusted by rotating the first lid member 70 in the circumferential direction. When the first lid member 70 is fixed to the bearing accommodating portion 65, the circumferential position of the first lid member 70 is determined by which of the plurality of fixing portions 71 is fixed and which of the plurality of fixing portions 63 is located. It can be determined by communicating with the fixing portion 63 and passing the bolt. In the present embodiment, since the plurality of fixing portions 71 and the plurality of fixing portions 63 are arranged at intervals of 45 degrees, the circumference of the first lid member 70 when the first lid member 70 is fixed to the bearing accommodating portion 65. The directional position can be adjusted at 45 degree intervals. By increasing the number of any one of the plurality of fixing portions 71 and the plurality of fixing portions 63, the circumferential position of the first lid member 70 can be adjusted more finely.

FIG. 7 is a side sectional view showing the first lid member 70 of FIG. 5 cut along a plane orthogonal to the X axis and passing through the central axis A. The first lid member 70 has a surface 70c which is an end surface on one side in the axial direction. When fixing the first lid member 70 to the bearing accommodating portion 65, the surface 70c of the first lid member 70 is aligned with the surface 65a of the bearing accommodating portion 65. The first lid member 70 has a hole 70a and a hole 70b extending in the axial direction. The hole 70a opens on one side in the axial direction. The opening on the other side of the hole 70a in the axial direction communicates with the opening on the other side in the axial direction of the hole 70b. The hole 70b opens on the other side in the axial direction. The shaft 22 penetrates the

holes

70a and 70b. The axial position of the first lid member 70 substantially coincides with the axial position of the oil receiving portion 22d of the shaft 22.

An O-ring 93, which is a sealing member, is provided at a position on the outer peripheral side of the surface 70c of the first lid member 70. The O-ring 93 seals the gap between the surface 70c and the surface 65a on the outer peripheral side of the surface 70c. During the hoisting operation of the hoisting machine 1, the surface 70c and the surface 65a do not slide in close contact with each other, and the sealing by the O-ring 93 can be maintained. Therefore, in the O-ring 93, the oil leaking from the other side in the axial direction of the first bearing 41 leaks to the outside from the outer peripheral side of the first lid member 70 between the surface 70c and the surface 65a, and the brake disc 31 It is possible to prevent the brake surface from being reached. An O-ring 94, which is a sealing member, is arranged on the outer peripheral side of the surface where the second lid member 80 contacts the first pedestal member 60 (see FIG. 8).

The first lid member 70 has an oil guiding portion 90. The oil guiding portion 90 has an oil passage 72 extending from the inside in the radial direction to the outside in the radial direction. The oil passage 72 has an opening 72a that opens radially inward of the first lid member 70 at the position of the hole 70b. The oil passage 72 has an opening 72b that opens radially outward of the first lid member 70. The oil passage 72 extends radially outward from the opening 72a that is radially outer of the shaft 22. One side in the axial direction and the other side in the axial direction of the hole 70b project inward in the radial direction so as to have a diameter smaller than the diameter of the hole 70b. Only one oil guiding portion 90 is provided in the circumferential direction of the first lid member 70. According to the present embodiment, since the first lid member 70 has the oil guiding portion 90, oil can be easily obtained only by adjusting the circumferential position when fixing the first lid member 70 to the first pedestal member 60. The position of the guide portion 90 can be adjusted. Therefore, regardless of the installation location of the hoisting machine 1, the oil guiding portion 90 is arranged on the lower side in the vertical direction of the shaft 22, and the oil flows into the oil passage 72 by its own weight.

FIG. 8 is an enlarged side sectional view showing a portion pointed to by the arrow B shown in FIG. The first lid member 70 is fixed to the bearing accommodating portion 65 at a circumferential position where the oil guiding portion 90 is located on the lower side in the vertical direction of the shaft 22. That is, the opening 72a of the oil guiding portion 90 is located on the lower side in the vertical direction of the shaft 22. The oil guiding portion 90 is formed by connecting the pipe member 92 to the opening 72b of the oil passage 72. The first lid member 70 includes a pipe member 92. The pipe member 92 may be a member integrated with the first lid member 70. The pipe member 92 may be a separate member from the first lid member 70. The tube member 92 is a tubular member having one end connected to the opening 72b, extending outward in the radial direction, and then extending to one side in the axial direction. The other end of the pipe member 92 is located on one side in the axial direction with respect to the end surface on one side in the axial direction of the first bearing 41. The oil that has flowed into the opening 72a of the oil passage 72 flows out from the other end of the pipe member 92.

A seal member 91 is arranged at a position where the shaft 22 faces the hole 70a in the radial direction. The seal member 91 is, for example, an SC type oil seal. Any known oil seal may be used as the seal member 91. According to the seal member 91, it is possible to prevent the oil leaking from the other side in the axial direction of the first bearing 41 from leaking to the other side in the axial direction through between the shaft 22 and the first lid member 70. However, if oil leaks to the other side in the axial direction from the seal member 91, the oil may adhere to the braking surface of the brake disc. Therefore, in the present embodiment, the oil guiding portion 90 is provided to guide the oil flowing into the opening 72a of the oil passage 72 in the direction away from the brake disc so that the oil flows out from the other end of the pipe member 92. By doing so, it is possible to prevent the oil leaking from the shaft 22 and the first lid member 70 to the other side in the axial direction from adhering to the braking surface of the brake disc.

The shaft 22 has a recess 22f that is recessed inward in the radial direction on the other side in the axial direction from the seal member 91. The recess 22f is a portion extending over the entire circumference of the shaft 22 in the circumferential direction. Further, the shaft 22 has a convex portion 22g that protrudes outward in the radial direction in the concave portion 22f. The convex portion 22g is a portion extending over the entire circumference of the shaft 22 in the circumferential direction. The opening 72a of the oil passage 72 is located on the outer side in the radial direction of the convex portion 22g and faces the convex portion 22g in the radial direction. The oil leaking to the other side in the axial direction from the seal member 91 flows along the shaft 22 to the other side in the axial direction, and reaches between the concave portion 22f and the convex portion 22g. When the shaft 22 rotates, the oil between the concave portion 22f and the convex portion 22g is moved from the radially outer end of the convex portion 22g to the inner peripheral surface of the hole 70b of the first lid member 70 by centrifugal force. Be skipped. The oil that has been blown to the inner peripheral surface of the hole 70b travels along the inner peripheral surface of the hole 70b, flows downward in the vertical direction of the inner peripheral surface of the hole 70b due to its own weight, reaches the opening 72a, and reaches the opening 72a. Inflow to.

As described above, the opening 72a of the oil passage 72 is located on the lower side of the shaft 22 in the vertical direction, so that the opening 72a exhibits a function as an oil guiding portion 90. However, depending on the installation condition of the hoisting machine 1, that is, the orientations of the

legs

100, 101, and 102, the opening 72a may not be located below the shaft 22 in the vertical direction. On the other hand, according to the present embodiment, since the circumferential position when fixing the first lid member 70 to the first pedestal member 60 can be adjusted, the opening 72a is always below the shaft 22 in the vertical direction. Can be easily located on the side.

In the above embodiment, a configuration example when the present invention is applied to an elevator hoisting machine has been described. However, the present invention is not limited to this. The present invention can be applied to a hoisting machine for any purpose as long as it is a hoisting machine for hoisting a rope.

The present invention is not limited to the above embodiment, and various improvements and design changes may be made without departing from the spirit of the present invention. In addition, the embodiments disclosed this time should be considered to be exemplary and not restrictive in all respects. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

This application claims priority based on Japanese Patent Application No. 2020-023426, which is a Japanese patent application filed on February 14, 2020, and incorporates all the contents described in the Japanese patent application.

1 ... hoisting machine, 10 ... motor, 20 ... sheave, 30 ... braking device, 40 ... first bearing part, 50 ... second bearing part, 22 ... shaft, 90 ... oil induction part

Claims

An elevator hoist that has a sheave that winds a rope that connects a basket and a balance weight, and rotates the sheave to wind up the rope.
A shaft that is arranged along the central axis and rotates the sheave,
The brake disc fixed to the sheave and
A bearing that rotatably supports the shaft on one side of the sheave in the axial direction,
A pedestal member that covers the radial outer side of the bearing over the entire circumference in the circumferential direction.
A lid member fixed to the other side of the pedestal member in the axial direction and covering the other side of the bearing in the axial direction.
With
The lid member has an oil guiding portion that guides oil leaking from the other side in the axial direction of the bearing in a direction away from the brake disc.
Hoisting machine.
The oil guide portion has an oil passage that extends radially outward from an opening that is radially outer of the shaft and then extends in a direction that extends away from the brake disc.
The lid member can be fixed to the pedestal member so that the opening is located on the lower side in the vertical direction of the shaft.
The hoisting machine according to claim 1.
Further having a leg for fixing the sheave to an external fixing surface,
The lid member is fixed to the pedestal member at a position corresponding to an angle formed by the fixed surface of the leg portion in contact with the fixed surface in the vertical direction.
The hoisting machine according to claim 2.
The shaft penetrates the lid member and
Further having a sealing member for sealing between the shaft and the lid member.
The hoisting machine according to claim 2 or 3.
The shaft has a convex portion that protrudes radially outward over the entire circumference in the circumferential direction on the other side in the axial direction from the seal member.
The opening is located radially outside the convex portion and faces the convex portion in the radial direction.
The hoisting machine according to claim 4.
The lid member is the first lid member and
It further has a second lid member that is fixed to one side of the pedestal member in the axial direction and covers one side of the bearing in the axial direction.
The hoisting machine according to any one of claims 1 to 5.
The bearing is the first bearing and
It further has a second bearing that rotatably supports the shaft on the other side of the sheave in the axial direction.
The hoisting machine according to any one of claims 1 to 6.
Further having a motor for rotationally driving the shaft.
The hoisting machine according to any one of claims 1 to 7.