Elevator hoisting machine

Abstract

To provide an elevator hoisting machine that allows for the replacement of adsorbent material at the appropriate time. [Solution] The present invention comprises a rotating part 3 having a sheave, a fixed part 2 supporting the rotating part 3, a bearing 5 provided between the rotating part 3 and the fixed part 2, and an adsorbent 6 placed in a flow path R1 for oil leaking from the bearing 5. The adsorbent 6 is in the form of a sheet with its thickness direction aligned with the axial direction, changes in appearance when it absorbs oil, and has an observation hole H that allows the axially facing surface of the adsorbent 6 to be seen from outside the hoisting machine 1.

Description

Technical Field

[0001] The present invention relates to a hoisting machine of an elevator.

Background Art

[0002] In the hoisting machine of the elevator, a sheave for suspending a car and a counterweight via a rope is provided (Patent Document 1). In order to rotate the sheave, a bearing is provided between a rotating part and a fixed part that supports the rotating part in the hoisting machine. For lubrication, for example, grease is enclosed inside the bearing. This grease is composed of a base oil, a thickener, an additive, and the like. Over time, a phenomenon occurs in which the liquid base oil gradually separates from the grease.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The liquid base oil separated by this phenomenon may leak out of the bearing, and this leaked base oil may stain the machine room and the hoistway outside the hoisting machine. Further, it may enter the brake part of the hoisting machine and interfere with braking.

[0005] As a countermeasure, it is conceivable to provide an adsorbent in the path through which the base oil flows out. In this case, it is necessary to replace the adsorbent according to the degree of adsorption of the base oil.

[0006] An object of the present invention is to provide a hoisting machine for an elevator that can replace an adsorbent at an appropriate timing.

Means for Solving the Problems

[0007] The elevator hoisting machine of the present invention comprises a rotating part having a sheave, a fixed part supporting the rotating part, a bearing provided between the rotating part and the fixed part, and an adsorbent material placed in the flow path for oil leaking from the bearing, wherein the adsorbent material is in the form of a sheet with its thickness direction aligned with the axial direction, changes in appearance when it absorbs oil, and has an observation hole that allows the axially facing surface of the adsorbent material to be seen from outside the hoisting machine.

[0008] With this configuration, the state of the adsorbent, which changes in appearance when it absorbs oil, can be checked through an observation hole provided in the hoisting machine, and the adsorbent can be replaced at the appropriate time according to the results.

[0009] In the elevator hoisting machine, the adsorbent material may be annular in shape and provided around the rotation center of the rotating part.

[0010] With this configuration, it is easy to position the annular adsorbent relative to the rotating part.

[0011] In the elevator hoisting machine, an oil collection section may be provided in the rotating section or the stationary section at a portion facing the adsorbent in the axial direction.

[0012] With this configuration, the aggregation unit can guide the base oil to the adsorbent without scattering it.

[0013] With this configuration, the oil collection unit can guide the base oil leaking from the bearing to the adsorbent without scattering it.

[0014] In the elevator hoisting machine, the paths for the oil flow on the rotating part side and the paths on the stationary part side may merge before reaching the adsorbent material.

[0015] With this configuration, the oil transmission paths (paths on the rotating part side and paths on the stationary part side) can be consolidated, making the structure of the hoisting machine more compact. [Effects of the Invention]

[0016] As described above, according to the present invention, it is possible to provide a hoisting machine for an elevator that can replace the adsorbent at an appropriate timing.

Brief Description of the Drawings

[0017] [Figure 1] It is a front view of the hoisting machine of the elevator of the present invention. [Figure 2] It is a longitudinal side view of the hoisting machine. [Figure 3] It is an enlarged view of the main part of FIG. 2.

Embodiments for Carrying Out the Invention

[0018] Hereinafter, an embodiment of a hoisting machine for an elevator according to the present invention will be described with reference to FIGS. 1 to 3. The hoisting machine 1 is provided with a sheave (not shown) around which a rope (not shown) for suspending a car for carrying people or goods and a counterweight (both not shown) is rotatably provided. The hoisting machine 1 is arranged at the upper part or the lower part of the hoistway in which the car moves up and down or inside the hoistway. In FIG. 2, the horizontal direction of the paper surface is defined as the front-rear direction, the vertical direction of the paper surface is defined as the up-down direction, and the direction penetrating the paper surface is defined as the left-right direction, and the following description will be made.

[0019] The hoisting machine 1 includes a rotating part 3 having a sheave, a fixing part 2 that supports the rotating part 3, and a bearing 5 provided between the rotating part 3 and the fixing part 2 (see FIG. 2). Further, the hoisting machine 1 includes an adsorbent 6 disposed in a flow path R1 of oil leaking from the bearing 5 (see FIG. 3). In the present embodiment, the hoisting machine 1 includes two braking parts B (see FIG. 1) for braking the sheave.

[0020] The fixing part 2 includes, for example, a fixed-side main body part 21 fixed to the floor surface, and a fixed shaft part 22 that is bolt-fixed through the fixed-side main body part 21 so as to protrude from a substantially central part in the up-down direction of the fixed-side main body part 21 to one side in the axial direction (front side in FIG. 2).

[0021] The fixed-side main body portion 21 is made of a metal material, and includes a first cylindrical portion 211 formed to protrude radially outward from the axially other end portion (the rear end portion in FIG. 2) of the fixed shaft portion 22, a first peripheral wall portion 212 extending radially outward from one axially end portion (the front end portion in FIG. 2) of the first cylindrical portion 211, a second cylindrical portion 213 extending axially from the outer peripheral edge of the first peripheral wall portion 212 to the axially other end portion (the rear end portion in FIG. 2) and constituting a stator, a second peripheral wall portion 214 extending radially outward from the axially other end portion (the rear end portion in FIG. 2) of the second cylindrical portion 213, a third cylindrical portion 215 extending axially from the outer peripheral edge of the second peripheral wall portion 214 to one axially end portion (the front end portion in FIG. 2), and a pair of leg portions 216, 216 (see FIG. 1) extending downward from the outer peripheral surface of the third cylindrical portion 215. A coil 213M is wound around the radially outer surface of the second cylindrical portion 213.

[0022] The fixed shaft portion 22 has a substantially cylindrical shape, and as shown in FIGS. 2 and 3, an annular recess 220 recessed rearward is provided at the front end. The annular recess 220 is provided continuously in a circle around the rotation center axis X of the rotating portion 3. In the present embodiment, the radially outer end portion 221 of the front end portion of the fixed shaft portion 22 has a chamfered shape (see FIG. 3).

[0023] The rotating portion 3 is rotatable with respect to the fixed portion 2. By the rotation of the rotating portion 3, the wire wheel and the rotating portion 3 rotate integrally. Further, the rotating portion 3 is made of a metal material, and as shown in FIG. 2, includes a cylindrical portion 31 that fits over the bearing 5, a disk-shaped plate portion 32 extending radially outward from the axially other end portion (the rear end portion in FIG. 2) of the cylindrical portion 31, and a cylindrical rotor 33 extending axially from the outer peripheral edge of the plate portion 32 to the axially other end side (the rear end side in FIG. 2).

[0024] The rotor 33 includes a plurality of permanent magnets 33A spaced in the circumferential direction. When the coil 213M in the second cylindrical portion (stator) 213 is energized, the rotor 33 rotates and the wire wheel rotates. The rotor 33 having the permanent magnets 33A and the stator (the second cylindrical portion 213) having the coil 213M constitute a motor. In this embodiment, an outer rotor type motor is used, but an inner rotor type motor may also be used.

[0025] The bearing 5 rotatably supports the rotating part 3 relative to the fixed part 2. The bearing 5 is provided in multiple locations (two in this embodiment) in the axial direction and is positioned between the outer circumferential surface of the fixed shaft part 22 and the inner circumferential surface of the cylindrical part 31 of the rotating part 3. The bearing 5 comprises a first bearing 51 located at one axial end (front side) and a second bearing 52 located at the other axial end (rear side). The bearing 5 can be composed of at least one of the following: a self-aligning roller bearing, a ball bearing, or a tapered bearing, but is composed of a ball bearing. However, the number and specific configuration of the bearing 5 are not limited.

[0026] As shown in Figure 3, the cover member 10 comprises a circular front plate portion 101, a cylindrical portion 102 extending rearward from the outer peripheral edge of the front plate portion 101, and a disc-shaped annular portion 103 that protrudes radially outward from the rear end of the cylindrical portion 102 and also protrudes rearward from approximately the circumferential center of the rear end surface. As shown in Figure 2, an encoder 13 for measuring the rotation speed of the sheave is provided in the center of the inside of the front plate portion 101 of the cover member 10. The main body of the encoder 13 is fixed to the fixed shaft portion 22 by a plurality of screws B1 (two in Figure 2).

[0027] In this embodiment, the cylindrical portion 102 of the cover member 10 has an annular first protrusion 102A that protrudes rearward from a position on the inner side of the rear end of the cylindrical portion 102 and extends in the circumferential direction (see Figure 3). The cylindrical portion 102 also has an annular second protrusion 102B that protrudes rearward from a position on the outer side of the rear end of the cylindrical portion 102 and extends in the circumferential direction.

[0028] The braking unit B consists of an electromagnetic brake (see Figure 1) that applies braking to the rotor 33 by switching from a non-braking state, where it is separated from the outer surface of the rotor 33, to a braking state, where it presses against the outer surface of the rotor 33 to apply braking.

[0029] The two bearings 51 and 52 are sealed with, for example, grease for lubrication. This grease consists of a base oil, a thickener, additives, etc. Over time, a phenomenon occurs in which the liquid base oil gradually separates from the grease.

[0030] The liquid base oil (hereinafter simply referred to as "oil") separated by this phenomenon may leak out from bearings 51 and 52, and this leaked oil may contaminate the machine room and elevator shaft outside the hoisting machine 1 (see Figure 3). It may also seep into the braking section B of the hoisting machine 1 and interfere with braking. To counter this, an adsorbent 6 is provided in the flow path R1 through which the base oil travels, as described above.

[0031] The adsorbent material 6 is positioned on the fixed part 2, specifically on the fixed shaft part 22. This adsorbent material 6 is positioned in the annular recess 220 of the fixed shaft part 22. Furthermore, the adsorbent material 6 is positioned axially outward (front) of the bearing 5 (first bearing 51). In addition, the adsorbent material 6 is positioned offset vertically from the bearing 5 (first bearing 51).

[0032] Furthermore, the adsorbent 6 is a sheet-like material with its thickness aligned with the axial direction, and its appearance changes when it absorbs oil. For example, when the adsorbent 6 absorbs oil, it changes from a light color to a dark color. The adsorbent 6 can be made of any material that can absorb oil, not just felt fabric. For example, the adsorbent 6 may be made of a sponge-like material or a paper cloth.

[0033] In this embodiment, the adsorbent 6 receives oil leaking from the bearings 51 and 52 (oil passing through the flow path R1). Flow path R1 is a flow path from the front end of the first bearing 51 through the fixed shaft portion 22 to the adsorbent 6. The adsorbent 6 also receives oil that adheres to the cover member 10 and drips down (oil passing through the flow path R2). Flow path R2 is a flow path from the front end of the first bearing 51 through the rear end of the annular portion 103 and the rear end of the cylindrical portion 102 of the cover member 10 to the adsorbent 6.

[0034] Observation holes H are provided in the member of the fixed part 2 and the rotating part 3 on the side where the suction material 6 is attached. In this embodiment, observation holes H are provided in the cover member 10 fixed to the fixed part 2. Observation holes H are through holes extending parallel to the rotational axis X of the rotating part 3, and are round holes. Specifically, multiple (two in Figure 2) round observation holes H are formed in the circumferential direction in the circular front plate portion 101 of the cover member 10. Note that observation holes H may have other shapes.

[0035] The axially oriented surface of the adsorbent 6 can be seen from outside the hoisting machine 1 through the observation hole H. In this embodiment, when viewed from an oblique direction radially outward from the rotational axis X, the axially oriented surface of the adsorbent 6 can be seen from outside the hoisting machine 1 through the observation hole H. The observation hole H is also used to insert the screw B1, which is another component of the hoisting machine 1, and fix the main body of the encoder 13 to the fixed shaft 22. In this configuration, the state of the adsorbent 6, whose appearance changes when it absorbs oil, can be checked through the observation hole H provided in the hoisting machine 1, and the adsorbent 6 can be replaced at an appropriate time according to the result. In this embodiment, the adsorbent 6 is attached and detached with the cover member 10 removed.

[0036] Furthermore, the adsorbent material 6 is annular in shape and is provided around the rotation center of the rotating part 3. Therefore, the annular adsorbent material 6 is easy to position relative to the rotating part 3. In this embodiment, the adsorbent material 6 is provided around the entire circumference of the rotation center of the rotating part 3 and is annular in shape, but it may also be provided only on a part of the circumferential direction. When the adsorbent material 6 is provided on a part of the circumferential direction around the rotation center of the rotating part 3, it is preferable that it is provided on at least half of the circumference.

[0037] In this embodiment, the rotating part 3 is provided with an oil collection section 7 in the portion facing the adsorbent material 6 in the axial direction. Specifically, the collection section 7 is composed of the first protrusion 102A of the cylindrical portion 102 of the cover member 10. The cross-sectional shape of the first protrusion 102A is a tapered projection (on the adsorbent material 6 side, in this embodiment, a projection that protrudes to the rear) with a narrower width on the protruding side. The collection section 7 guides the oil to the tip of this projection and transmits it to the adsorbent material 6. In this way, the collection section 7 that collects the oil can guide the base oil leaking from the bearing 5 to the adsorbent material 6 without scattering it. The collection section 7 is positioned to press the adsorbent material 6 from the front. The collection section 7 may also be provided in the portion of the fixed part 2 that faces the adsorbent material 6 in the axial direction.

[0038] In this embodiment, the paths for oil transmission from the bearing 5, the path on the rotating part 3 side and the path on the stationary part 2 side, merge before reaching the adsorbent 6. Specifically, the flow path R1 on the rotating part 3 side and the flow path R2 on the stationary part 2 side merge at the lower end 1020B of the second protrusion 102B of the cylindrical part 102 of the cover member 10. At the lower end 1020B, the distance between the second protrusion 102B and the stationary shaft part 22 is narrowed. Therefore, the oil transmission paths (flow path R1 on the rotating part 3 side and flow path R2 on the stationary part 2 side) can be consolidated, making the structure of the hoisting machine 1 more compact.

[0039] The present invention can be modified in various ways without departing from its spirit. Furthermore, the specific configuration of each part is not limited to the embodiments described above.

[0040] In the above embodiment, the adsorbent 6 was placed in the fixed part 2, but it may also be placed in the rotating part 3 at a position that overlaps with the flow path from the bearings 51 and 52.

[0041] In the above embodiment, the suction material 6 was attached and detached with the cover member 10 removed. However, in a configuration where the cover member 10 is not provided in front of the suction material 6, the suction material 6 can be attached and detached through the observation hole H. Furthermore, dedicated openings for attaching and detaching the suction material 6 may be provided in the fixing part 2 or the rotating part 3. [Explanation of Symbols]

[0042] 1... Hoisting machine, 2... Fixed part, 3... Rotating part, 5... Bearing, 6... Adsorption material, 7... Accumulation part, 9... Positioning member, 10... Cover member, 13... Encoder, 21... Fixed side main body part, 22... Fixed shaft part, 31... Cylindrical part, 32... Plate part, 33... Rotor, 33A... Permanent magnet, 51... First bearing, 52... Second bearing, 101... Front plate part, 101A... Connecting part, 102... Cylindrical part, 102A ...First protrusion, 102B...Second protrusion, 103...Annular section, 211...First cylindrical section, 212...First peripheral wall section, 213...Second cylindrical section (stator), 213M...Coil, 214...Second peripheral wall section, 215...Third cylindrical section, 216...Legs, 220...Annular recess, 221...End section, 1020B...Lower end, B...Brake section, B1...Screw, H...Observation hole, R1, R2...Flow path, X...Rotational axis

Claims

1. A rotating part having a sheave, A fixing part that supports the rotating part, A bearing is provided between the rotating part and the stationary part, The system comprises an adsorbent placed in the oil flow path from the bearing, The adsorbent is in the form of a sheet with its thickness direction aligned with the axial direction, and its appearance changes when it absorbs oil. An elevator hoisting machine equipped with an observation hole that allows the axially facing surface of the adsorbent material to be viewed from the outside of the hoisting machine.

2. The elevator hoisting machine according to claim 1, wherein the adsorbent is annular and is provided around the rotation center of the rotating part.

3. The elevator hoisting machine according to claim 1 or 2, wherein an oil collection portion for collecting oil is provided in the rotating portion or the stationary portion in a portion facing the adsorbent material in the axial direction.

4. The elevator hoisting machine according to claim 1 or 2, wherein, regarding the oil transmission path, the path on the rotating part side and the path on the stationary part side merge before reaching the adsorbent.

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