JP2024033708A - Elevator hoisting machine and its oil supply device - Google Patents

Abstract

The present invention provides an elevator hoist and its oil supply device 8 for supplying lubricating oil leaked from a gear case to a reduction gear housed in the gear case. An elevator hoist and its oil supply device 8 include a recovery section 9, a pump 10, and a supply pipe 11. The recovery unit 9 recovers lubricating oil leaked from the gear case in which the reduction gear is housed. The pump 10 includes a rotating member 12 attached to a rotating shaft 3 of a hoisting machine, and as the rotating member 12 rotates in conjunction with the rotation of the rotating shaft 3, the lubricating oil collected by the recovery unit 9 is transferred to a supply pipe. Stream to 11. The supply pipe 11 supplies lubricating oil to the speed reducer. [Selection diagram] Figure 3

Description

The present disclosure relates to an elevator hoist and an oil supply device thereof.

In conventional elevator hoisting machines, lubricating oil that leaks from the gear case in which the reducer is housed and adheres to the rotating shaft of the motor is wiped off by a wiper that is in sliding contact with the rotating shaft, and is removed along the support member. It hangs down and is collected in the case (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2002-308551

In the conventional elevator hoisting machine described above, since the lubricating oil leaked from the gear case is only recovered, there is a problem that the lubricating oil in the gear case gradually decreases.

The present disclosure has been made in order to solve the above problems, and provides an elevator hoist and its oil supply device that can supply lubricating oil leaked from a gear case to a reduction gear housed in the gear case. The purpose is to obtain.

The oil supply device for an elevator hoisting machine according to the present disclosure includes a collection part that collects lubricating oil leaked from a gear case in which a reducer is housed, a supply pipe that supplies lubricating oil to the reducer, and a hoisting machine. The pump includes a rotating member attached to a rotating shaft, and a pump that flows the lubricating oil collected by the recovery unit into the supply pipe by rotating the rotating member in conjunction with the rotation of the rotating shaft.

The oil supply device for an elevator hoisting machine according to the present disclosure includes a collection part that collects lubricant oil leaked from a gear case in which a reduction gear is housed, an inlet port where the lubricant oil flows in, and an outlet port where the lubricant oil flows out. a supply pipe connected to the outflow port and supplying lubricating oil flowing out from the outflow port to the reducer; a piston rod having one end disposed within the cylinder and the other end protruding from the cylinder; and one end of the piston rod. a piston that is attached to the cylinder, is in close contact with the inner cylindrical surface of the cylinder on its entire circumference, and is movable in the axial direction of the cylinder; and an elastic member that biases the piston in a first direction from one end of the piston rod to the other end. , a rotating member that is attached to the rotating shaft of the hoist and moves the piston via the piston rod in a second direction from the other end of the piston rod toward the one end; The lubricating oil is caused to flow into the cylinder from the inlet through the inlet, and when the piston moves in the second direction, the lubricating oil is prevented from flowing from inside the cylinder through the inlet and into the recovery part. When the piston moves in the first direction, the lubricating oil is suppressed from flowing in the direction from the supply pipe to the inlet, and when the piston moves in the second direction, the lubricating oil is suppressed from flowing into the supply pipe. and a second valve that allows the flow to flow in the direction of the flow.

An elevator hoisting machine according to the present disclosure includes a rotating shaft, a gear case in which a reducer is housed, a collection section that collects lubricating oil leaked from the gear case, a supply pipe that supplies lubricating oil to the reducer, and a rotating shaft. The pump includes a rotating member attached to a shaft, and a pump that causes the lubricating oil collected by the recovery section to flow into the supply pipe by rotating the rotating member in conjunction with the rotation of the rotating shaft.

An elevator hoist according to the present disclosure includes a rotating shaft, a gear case in which a reduction gear is housed,
A collection part that collects lubricating oil leaked from the gear case, a cylinder that has an inlet where the lubricating oil flows in and an outlet where the lubricating oil flows out, and a cylinder that is connected to the outflow port and supplies the lubricating oil that has flowed out from the outlet to the reducer. A supply pipe, a piston rod whose one end is arranged inside the cylinder and the other end protrudes from the cylinder, and which is attached to one end of the piston rod, tightly contacts the inner cylindrical surface of the cylinder all around, and is movable in the direction of the cylinder axis. an elastic member that urges the piston in a first direction from one end of the piston rod to the other end; a rotating member that moves the piston in a second direction via a piston rod; When the piston moves in the first direction, the lubricating oil passes through the inlet from the cylinder and is prevented from flowing out to the recovery part. and a second valve that suppresses backflow to the side and allows the lubricating oil to flow out in the direction to send the lubricating oil to the supply pipe when the piston moves in the second direction.

According to the elevator hoisting machine and its oil supply device according to the present disclosure, lubricating oil leaked from the gear case can be supplied to the reduction gear housed in the gear case.

1 is a front view of an elevator hoist in Embodiment 1. FIG. FIG. 2 is a sectional view taken along line A-A' of the elevator hoisting machine according to the first embodiment. FIG. 2 is a sectional view of an oil supply device for an elevator hoisting machine in Embodiment 1. FIG. 2 is a cross-sectional view of the oil supply device of the elevator hoisting machine in which lubricating oil has flowed in according to the first embodiment. FIG. 2 is a sectional view of the oil supply device of the elevator hoisting machine in a state where lubricating oil has flowed out in the first embodiment. FIG. 3 is a cross-sectional view showing a modification of the oil supply device for the elevator hoisting machine according to the first embodiment. FIG. 3 is a cross-sectional view of an oil supply device for an elevator hoisting machine according to a second embodiment. FIG. 7 is a cross-sectional view of the oil supply device of the elevator hoisting machine in a state where lubricating oil has flowed in according to the second embodiment. FIG. 7 is a cross-sectional view of the oil supply device of the elevator hoisting machine in a state in which lubricating oil has flowed out in Embodiment 2; It is a front view of the hoisting machine for elevators in Embodiment 3. FIG. 7 is a sectional view of the oil supply device of the elevator hoisting machine in a state where lubricating oil has flowed in according to Embodiment 3; FIG. 7 is a cross-sectional view of the oil supply device of the elevator hoisting machine in a state in which lubricating oil has flowed out in Embodiment 3; It is a front view of the hoisting machine for elevators in Embodiment 4. FIG. 7 is a sectional view taken along line B-B' of an elevator hoisting machine according to a fourth embodiment. FIG. 7 is a cross-sectional view of an oil supply device for an elevator hoisting machine in Embodiment 4.

Embodiment 1.
Below, an elevator hoist and its oil supply device according to Embodiment 1 will be described in detail. Note that the same reference numerals in each drawing represent the same or equivalent configurations.

As shown in FIG. 1, the elevator hoist 1 includes an electric motor 2, a rotating shaft 3, a brake 4, a sheave 5, a rotating shaft 6, a gear case 7, and an oil supply device 8. The electric motor 2 rotates the sheave 5 via a reduction gear (not shown) housed in a gear case 7. The rotating shaft 3 is a rotating shaft of the elevator hoist 1. Specifically, the rotating shaft 3 is the rotating shaft of the electric motor 2. The rotating shaft 3 is rotated by the electric motor 2 and transmits rotation to the reduction gear. Further, the rotating shaft 3 is braked by a brake 4. The speed reducer reduces the rotation transmitted from the rotating shaft 3 and transmits the rotation to the rotating shaft 6.

The rotating shaft 6 is a rotating shaft of the elevator hoist 1. Specifically, the rotating shaft 6 is the rotating shaft of the sheave 5. As shown in FIG. 2, the rotating shaft 6 is provided to protrude from the gear case 7. A sheave 5 is attached to the rotating shaft 6. The sheave 5 rotates in conjunction with the rotation of the rotating shaft 6. A suspension body (not shown) is wound around the sheave 5, one end of which is connected to a cage (not shown), and the other end of which is connected to a counterweight (not shown). Note that in FIG. 2, illustration of the oil supply device 8 is omitted.

The gear case 7 houses a reduction gear having a plurality of gears. Lubricating oil is injected into the gear case 7 in order to operate the reducer smoothly. As shown in FIG. 2, the rotating shaft 3 is provided at a lower position than the rotating shaft 6 in the height direction of the gear case 7, that is, in the vertical direction of the plane of the drawing. Therefore, the lubricating oil in the gear case 7 tends to leak from the gap between the rotating shaft 3 and the gear case 7. Therefore, a packing (not shown), which is a sealing member, is inserted into a portion of the gear case 7 through which the rotating shaft 3 passes, in order to suppress leakage of lubricating oil from the gear case 7. The packing is held down by a packing land 7a, and the packing land 7a is attached to the gear case 7 with four bolts 7b. A packing and a packing land may also be provided in the portion of the gear case 7 through which the rotating shaft 6 passes, in the same manner as described above, to suppress leakage of lubricating oil from the gear case 7.

Note that the lubricating oil is, for example, grease. The lubricating oil may contain additives such as antioxidants, extreme pressure additives, antirust additives, and corrosion inhibitors.

As shown in FIG. 3, the oil supply device 8 is a device that collects lubricating oil leaking from the gear case 7 and supplies the lubricating oil to the reduction gear housed in the gear case 7. The oil supply device 8 includes a recovery section 9, a pump 10, and a supply pipe 11. The recovery unit 9 is arranged directly below the rotating shaft 3. Lubricating oil that has passed through the gap between the rotating shaft 3 and the gear case 7 and leaked from the gear case 7 is recovered by a recovery section 9.

The pump 10 includes a rotating member 12, a cylinder 13, a piston rod 14, a piston 15, a roller 16, a spring 17, a first valve 18, and a second valve 19.

The rotating member 12 is formed into a disk shape so that its outer periphery is circular, and is attached to the rotating shaft 3. The rotating shaft 3 passes through an eccentric position of the rotating member 12. Therefore, the rotating member 12 rotates in conjunction with the rotation of the rotating shaft 3, with the rotation center being at a position offset from the center of the rotating member 12.

The cylinder 13 is arranged in the recovery section 9 so that the cylinder axis direction of the cylinder 13 is parallel to the vertical direction. The cylinder 13 has a cylindrical portion 13a, an upper lid portion 13b, and a lower lid portion 13c. The upper lid part 13b is arranged at the upper end of the cylindrical part 13a, and is provided so as to cover the hollow space of the cylindrical part 13a from above in the vertical direction. The upper lid portion 13b has an opening 13d through which the piston rod 14 passes. The lower lid part 13c is arranged at the lower end of the cylindrical part 13a, and is provided so as to cover the hollow part of the cylindrical part 13a from below in the vertical direction. The cylinder 13 also has an inlet 13e through which the lubricating oil collected by the recovery unit 9 flows into the cylinder 13, and an outlet 13f through which the lubricating oil that has flowed into the cylinder 13 from the inlet 13e flows out. The inlet 13e and the outlet 13f are provided below the cylindrical portion 13a. In the following description, the cylindrical axis direction of the cylinder 13 is also referred to as the vertical direction.

A partition plate 13g is provided inside the cylinder 13. The partition plate 13g is formed so that its cross section is T-shaped. The partition plate 13g is arranged to separate the inlet 13e and the outlet 13f.

The piston rod 14 is formed into a rod shape and is arranged to extend in the vertical direction. The piston rod 14 passes through an opening 13d in the upper cover 13b of the cylinder 13. Therefore, one end of the piston rod 14 is disposed within the cylinder 13, and the other end protrudes from the upper surface of the cylinder 13. In the following description, the first direction from one end of the piston rod 14 to the other end is referred to as an upward direction, and the second direction from the other end of the piston rod 14 to one end is referred to as a downward direction.

The piston 15 is formed in a cylindrical shape and is attached to one end of the piston rod 14. The piston 15 is provided in close contact with an inner cylindrical surface 13h, which is an inner surface of the cylindrical portion 13a of the cylinder 13, over its entire circumference, and is movable in the vertical direction. Note that the piston 15 may be provided with a sealing member such as an O-ring on its outer periphery.

The roller 16 is provided at the other end of the piston rod 14 and is in contact with the rotating member 12. Since the roller 16 is provided so that its rotation axis is parallel to the rotation axis 3, it rotates in conjunction with the rotation of the rotation member 12.

The spring 17, which is an elastic member, is made of metal such as stainless steel and is provided inside the cylinder 13. Specifically, the spring 17 is provided on a path through which the lubricating oil flowing inside the cylinder 13 passes. The route is a route that connects the inlet 13e, a space 20, which will be described later, and the outlet 13f. One end of the spring 17 is attached to the upper end of the partition plate 13g, and the other end is attached to the piston 15. Spring 17 urges piston 15 upward.

The first valve 18 is specifically a swing type check valve. The first valve 18 is provided within the cylinder 13, and one end thereof is rotatably attached to the inner cylinder surface 13h. Specifically, when the other end of the first valve 18 is in contact with the partition plate 13g, it is in contact with the upper part of the partition plate 13g, which extends in a direction perpendicular to the up-down direction, from above. When the other end of the first valve 18 is away from the partition plate 13g, the first valve 18 is in an open state. When the first valve 18 is closed, the inlet 13e and the space 20 are separated from each other, and when the first valve 18 is opened, the inlet 13e and the space 20 are communicated with each other. Note that the space 20 is a part of the space inside the cylinder 13. Specifically, the space 20 includes the piston 15, the inner cylindrical surface 13h of the cylinder 13, the first valve 18, the partition plate 13g, and the second valve when the first valve 18 and the second valve are closed. This is the space surrounded by 19.

The second valve 19 is specifically a swing type check valve. The second valve 19 is provided within the cylinder 13, and one end thereof is rotatably attached to the inner cylinder surface 13h. When the other end of the second valve 19 is in contact with the partition plate 13g, specifically, when it is in contact with the upper part of the partition plate 13g from below, the second valve 19 is in a closed state. , when the other end of the second valve 19 is away from the partition plate 13g, the second valve 19 is in an open state. When the second valve 19 is closed, the space 20 and the outlet 13f are separated from each other, and when the second valve 19 is opened, the space 20 and the outlet 13f are communicated with each other.

The supply pipe 11 has one end connected to the outlet 13f of the cylinder 13, and the other end connected to the upper part of the gear case 7. The supply pipe 11 supplies the lubricating oil flowing out from the outlet 13f to the reduction gear of the gear case 7.

The oil supply device 8 further includes a plurality of third valves 21 provided within the supply pipe 11. The third valve 21 is specifically a duckbill check valve. The third valve 21 allows lubricating oil to flow in the direction from the outlet 13f of the cylinder 13 toward the gear case 7 in the supply pipe 11, and prevents the lubricant from flowing in the direction from the gear case 7 to the outlet 13f of the cylinder 13. suppress. In other words, the third valve 21 causes the lubricating oil to flow in the direction from one end of the supply pipe 11 to the other end, and suppresses the lubricating oil from flowing in the direction from the other end of the supply pipe 11 to the one end.

Next, a lubricating oil supply operation in the elevator hoisting machine 1 equipped with the oil supply device 8 configured as described above will be explained.

First, the recovery unit 9 recovers lubricating oil that has passed through the gap between the rotating shaft 3 and the gear case 7 and leaked from the gear case 7 .

Next, the pump 10 causes the lubricating oil collected by the collection unit 9 to flow into the supply pipe 11 by rotating the rotating member 12 in conjunction with the rotation of the rotating shaft 3 . The specific operation of the pump 10 will be described below.

First, the operation of causing the lubricating oil collected by the collection unit 9 to flow into the cylinder 13 by rotating the rotating member 12 will be described. The rotating member 12 rotates in the direction indicated by the arrow r1 in FIG. 4 in conjunction with the rotation of the rotating shaft 3, with the rotation center being at a position offset from the center of the rotating member 12. When the rotating member 12 rotates 180 degrees from the rotational position P1 shown in FIG. 4, it moves to the rotational position P2 shown in FIG. When the rotating member 12 further rotates 180 degrees from the rotational position P2, it moves to the rotational position P1.

When the rotating member 12 rotates and moves from the rotating position P1 to the rotating position P2, the rotating member 12 moves the piston 15 downward via the roller 16 and the piston rod 14. When the rotating member 12 further rotates and moves from the rotational position P2 to the rotational position P1, the piston 15 is urged by the spring 17 and moves upward. As the rotating member 12 rotates in this manner and moves between the rotational position P1 and the rotational position P2, the piston 15 repeats vertical movement.

As shown in FIG. 4, when the piston 15 moves upward, the pressure of the gas in the space 20 inside the cylinder 13 decreases, so the other end of the first valve 18 moves away from the partition plate 13g and the first valve 18 moves away from the partition plate 13g. The valve 18 is opened, and the inflow port 13e and the space 20 are communicated with each other. The lubricating oil recovered by the recovery unit 9 then flows into the space 20 within the cylinder 13. In other words, when the piston 15 moves upward, the first valve 18 allows the lubricating oil to flow from the collection portion 9 into the space 20 within the cylinder 13 through the inlet 13e. Note that the arrow inside the cylinder in FIG. 4 indicates the direction in which lubricating oil flows.

Furthermore, when the piston 15 moves upward, the pressure of the gas in the space 20 inside the cylinder 13 decreases, so that the other end of the second valve comes into contact with the partition plate 13g and the second valve 19 closes. , the space 20 and the outlet 13f are separated from each other. Therefore, the lubricating oil is prevented from flowing backward, that is, from flowing into the space 20 inside the cylinder 13 from inside the supply pipe 11 or near the outlet 13f inside the cylinder 13. That is, the second valve 19 suppresses the lubricating oil from flowing in the direction from the supply pipe 11 toward the inlet 13e when the piston 15 moves upward.

Next, the operation of causing the lubricating oil in the cylinder 13 to flow into the supply pipe 11 by rotating the rotating member 12 will be described. As shown in FIG. 5, when the piston 15 moves downward, the pressure of the gas in the space 20 inside the cylinder 13 increases, so the other end of the second valve 19 moves away from the partition plate 13g and the second end moves away from the partition plate 13g. The valve 19 is opened, and the space 20 and the outlet 13f are communicated with each other. Then, the lubricating oil that has flowed into the space 20 within the cylinder 13 passes through the outlet 13f and flows into the supply pipe 11. That is, the second valve 19 causes the lubricating oil to flow out in the direction toward the supply pipe 11 when the piston 15 moves downward. Note that the arrow inside the cylinder in FIG. 5 indicates the direction in which lubricating oil flows.

Further, when the piston 15 moves downward, the pressure of the gas in the space 20 inside the cylinder 13 increases, so that the other end of the first valve 18 comes into contact with the partition plate 13g, and the first valve 18 closes. When closed, the inlet 13e and the space 20 are separated. Therefore, the lubricating oil is prevented from flowing backward, that is, the lubricating oil is prevented from flowing from the space 20 in the cylinder 13 through the inflow port 13e to the recovery section 9. That is, the first valve 18 prevents the lubricating oil from flowing out from inside the cylinder 13 through the inlet port 13e and into the recovery section 9 when the piston 15 moves downward.

As described above, the pump 10 causes the lubricating oil collected by the collection unit 9 to flow into the supply pipe 11 by rotating the rotating member 12 in conjunction with the rotation of the rotating shaft 3 .

Finally, the supply pipe 11 supplies the lubricating oil flushed by the pump 10 to the reduction gear of the gear case 7. The lubricating oil passes through the third valve 21 and flows from the outlet 13f of the cylinder 13 toward the gear case 7. If the lubricating oil flows backward during this process, that is, if the lubricating oil flows in the direction from the gear case 7 toward the outlet 13f of the cylinder 13, the third valve 21 suppresses this backward flow.

As explained above, the elevator hoist 1 includes the oil supply device 8. In the oil supply device 8 according to the first embodiment, even if lubricant oil leaks from the gear case 7, the recovery unit 9 recovers the lubricant oil, and the pump 10 transfers the lubricant oil from the recovery unit 9 to the supply pipe 11. The supply pipe 11 supplies lubricating oil to the reduction gear housed in the gear case 7. Specifically, the pump 10 includes a rotating member 12, a cylinder 13, a piston rod 14, a piston 15, a spring 17, a first valve 18, and a second valve 19. When the piston 15 moves upward by being biased by the spring 17, the first valve 18 causes the lubricating oil to flow into the cylinder 13 from the collection portion 9 through the inlet 13e. When the piston 15 moves downward due to the rotation of the rotating member 12, the second valve 19 causes the lubricating oil to flow out in a direction toward the supply pipe 11.

If the lubricating oil leaks from the gear case 7 and the lubricating oil in the gear case 7 gradually decreases, sufficient lubricating oil will not be supplied to the gears of the reduction gear, which may cause damage such as wear or seizure of the gears. The oil supply device 8 in the first embodiment can supply lubricating oil leaked from the gear case 7 to the reduction gear housed in the gear case 7. In other words, even if the lubricating oil leaks from the gear case 7 and the lubricating oil in the gear case 7 gradually decreases, the lubricating oil can be automatically replenished because the pump 10 operates in conjunction with the rotation of the rotating shaft 3. . By supplying the lubricating oil, it is possible to suppress the occurrence of damage to the gears of the reduction gear.

Furthermore, the oil supply device 8 in the first embodiment further includes a third valve 21 that is provided in the supply pipe 11 and suppresses the lubricating oil from flowing in the direction toward the outlet 13f. Therefore, the lubricating oil is prevented from flowing back into the cylinder 13 from the supply pipe 11, and the pump 10 can efficiently flow the lubricating oil.

Further, in the oil supply device 8 in the first embodiment, a rotating member 12 is attached to the rotating shaft 3 of the electric motor 2. Since the pump 10 can flow the lubricating oil collected by the collection unit 9 into the supply pipe 11 by rotating the rotating shaft 3, there is no need to provide a new electric motor to operate the pump 10.

Furthermore, the oil supply device 8 in the first embodiment further includes a roller 16 that is provided at the other end of the piston rod 14, contacts the rotating member 12, and rotates in conjunction with the rotation of the rotating member 12. If the other end of the piston rod 14 comes into contact with the rotating member 12, there is a risk that the other end of the piston rod 14 will wear out. By providing the roller 16 provided at the other end of the piston rod 14, wear at the other end of the piston rod 14 can be suppressed. Furthermore, since the roller 16 rotates in conjunction with the rotation of the rotating member 12, wear of the roller 16 caused by contact between the roller 16 and the rotating member 12 can be suppressed.

Furthermore, the oil supply device 8 in the first embodiment includes a spring 17 formed of metal and provided within the cylinder 13. Since the spring 17 is provided inside the cylinder 13 , the lubricating oil that has flowed into the cylinder 13 from the recovery section 9 adheres to the surface of the spring 17 . Therefore, the surface of the spring 17 can be prevented from rusting.

Although an example in which a plurality of third valves 21 are provided has been described, there may be only one third valve 21.

Note that the supply pipe 11 does not need to be connected to the upper part of the gear case 7 as long as it can supply lubricating oil to the reduction gear housed in the gear case 7.

Note that, as shown in FIG. 6, the oil supply device 8 may include an inflow pipe 22 whose one end is connected to the inflow port 13e. At this time, the lubricating oil recovered by the recovery section 9 flows from the other end of the inflow pipe 22 into the cylinder 13 through the inflow port 13e. When the inflow pipe 22 is provided in this way, only the other end of the inflow pipe 22 may be disposed inside the recovery section 9 and the cylinder 13 may be disposed outside the recovery section 9. can be placed.

Further, an example in which the first valve 18 and the second valve 19 are provided in the cylinder 13 has been described, but as shown in FIG. may be provided within the supply pipe 11. At this time, the space 20 refers to the space within the cylinder 13 that is below the piston 15 when the first valve 18 and the second valve are closed, and the space within the inflow pipe 22 that is located below the piston 15. A space closer to the cylinder 13 and a space inside the supply pipe 11 closer to the cylinder 13 than the second valve 19.

Embodiment 2.
The oil supply device 8 in the second embodiment differs from the first embodiment in that the outer periphery of the rotating member 12 is egg-shaped. Further, this embodiment differs from the first embodiment in that the spring 17 is provided outside the cylinder 13. Furthermore, this embodiment differs from the first embodiment in that the partition plate 13g and the roller 16 are not provided. The differences will be explained below.

As shown in FIG. 7, the rotating member 12 is formed so that its outer periphery is oval. The rotating member 12 rotates in conjunction with the rotation of the rotating shaft 3, with the rotation center being at a position offset from the center of the rotating member 12.

A flange portion 23 is provided at the other end of the piston rod 14 . The collar portion 23 extends in a direction perpendicular to the up-down direction. The collar portion 23 is in contact with the rotating member 12 .

The spring 17 is wound around the piston rod 14 and is provided between the upper lid portion 13b of the cylinder 13 and the collar portion 23 of the piston rod 14.

The first valve 18 is provided within the cylinder 13, and one end thereof is rotatably attached to the inner cylinder surface 13h. When the other end of the first valve 18 is in contact with the inner cylinder surface 13h, the first valve 18 is in a closed state, and when the other end of the first valve 18 is away from the inner cylinder surface 13h. , the first valve 18 is in the open state. When the first valve 18 closes, the inlet 13e closes, and when the first valve opens, the inlet 13e opens.

A second valve 19 is provided within the supply pipe 11 . The second valve 19 has one end rotatably attached to an outer cylindrical surface 13i, which is an outer surface of the cylindrical portion 13a of the cylinder 13. When the other end of the second valve 19 is in contact with the outer cylindrical surface 13i, the second valve 19 is in a closed state, and when the other end of the second valve 19 is away from the outer cylindrical surface 13i. , the second valve 19 is in an open state. When the second valve 19 closes, the outlet 13f closes, and when the second valve 19 opens, the outlet 13f opens.

Next, a lubricating oil supply operation in the elevator hoisting machine 1 equipped with the oil supply device 8 configured as described above will be explained. Among the lubricating oil supply operations, the operations of the pump 10 that are different from those in the first embodiment will be described.

First, the operation of causing the lubricating oil collected by the collection unit 9 to flow into the cylinder 13 by rotating the rotating member 12 will be described. The rotating member 12 rotates in the direction indicated by an arrow r2 in FIG. 8 in conjunction with the rotation of the rotating shaft 3, with the rotation center being at a position offset from the center of the rotating member 12. When the rotating member 12 rotates 180 degrees from the rotational position P3 shown in FIG. 8, it moves to the rotational position P4 shown in FIG. When the rotating member 12 further rotates 180 degrees from the rotational position P4, it moves to the rotational position P3.

When the rotating member 12 rotates and moves from the rotating position P3 to the rotating position P4, the rotating member 12 moves the piston 15 downward via the collar 23 and the piston rod 14. When the rotating member 12 further rotates and moves from the rotational position P4 to the rotational position P3, the piston 15 is urged by the spring 17 and moves upward. As the rotating member 12 rotates in this manner and moves between the rotational position P3 and the rotational position P4, the piston 15 repeats vertical movement.

When the piston 15 moves upward, the pressure of the gas in the space 20 inside the cylinder 13 decreases, so the other end of the first valve 18 separates from the inner cylinder surface 13h, causing the opening of the first valve 18 and the flow. Entrance 13e opens. The lubricating oil recovered by the recovery unit 9 then flows into the space 20 within the cylinder 13. In other words, when the piston 15 moves upward, the first valve 18 allows the lubricating oil to flow from the collection portion 9 into the space 20 within the cylinder 13 through the inlet 13e. Note that the arrow inside the cylinder in FIG. 8 indicates the direction in which lubricating oil flows. Note that the space 20 is a part of the space inside the cylinder 13, and specifically, a space in a part where the lower lid part 13c and the piston 15 face each other in the vertical direction.

Further, when the piston 15 moves upward, the pressure of the gas in the space 20 inside the cylinder 13 becomes low, so that the other end of the second valve 19 comes into contact with the outer cylindrical surface 13i, and the second valve 19 is closed, and the outlet 13f is closed. Therefore, the lubricating oil is prevented from flowing backward, that is, the lubricating oil is prevented from flowing from inside the supply pipe 11 to the space 20 inside the cylinder 13. That is, the second valve 19 suppresses the lubricating oil from flowing in the direction from the supply pipe 11 toward the inlet 13e when the piston 15 moves upward.

Next, the operation of causing the lubricating oil in the cylinder 13 to flow into the supply pipe 11 by rotating the rotating member 12 will be described. As shown in FIG. 9, when the piston 15 moves downward, the pressure of the gas in the space 20 inside the cylinder 13 increases, so the other end of the second valve 19 moves away from the outer cylindrical surface 13i. The valve 19 opens and the outlet 13f opens. Then, the lubricating oil that has flowed into the space 20 within the cylinder 13 passes through the outlet 13f and flows into the supply pipe 11. That is, the second valve 19 causes the lubricating oil to flow out in the direction toward the supply pipe 11 when the piston 15 moves downward. Note that the arrow inside the cylinder in FIG. 9 indicates the direction in which lubricating oil flows.

Further, when the piston 15 moves downward, the pressure of the gas in the space 20 inside the cylinder 13 increases, so that the other end of the first valve 18 comes into contact with the inner cylindrical surface 13h, and the first valve 18 is closed, and the inlet 13e is closed. Therefore, the lubricating oil is prevented from flowing backward, that is, the lubricating oil is prevented from flowing from the space 20 in the cylinder 13 through the inflow port 13e to the recovery section 9. That is, the first valve 18 prevents the lubricating oil from flowing out from inside the cylinder 13 through the inlet port 13e and into the recovery section 9 when the piston 15 moves downward.

As described above, the pump 10 causes the lubricating oil collected by the collection unit 9 to flow into the supply pipe 11 by rotating the rotating member 12 in conjunction with the rotation of the rotating shaft 3.

Even in the oil supply device 8 shown in the second embodiment configured as described above, lubricating oil leaked from the gear case 7 is transferred to the gear case 7 similarly to the oil supply device 8 shown in the first embodiment. It can be supplied to the housed reducer. In other words, even if the lubricating oil leaks from the gear case 7 and the lubricating oil inside the gear case 7 gradually decreases, the lubricating oil can be automatically replenished because the pump 10 operates in conjunction with the rotation of the rotating shaft 3. . By supplying the lubricating oil, it is possible to suppress the occurrence of damage to the gears of the reduction gear.

Embodiment 3.
The oil supply device 8 in the third embodiment differs from the first embodiment in that a piston rod 14 is attached to two rotating members 12. The differences will be explained below.

As shown in FIG. 10, the rotating shaft 3 has one rotating shaft 3 and the other rotating shaft 3. One rotating shaft 3 is rotated by the electric motor 2. When one rotating shaft 3 rotates, the other rotating shaft 3 rotates via two rotating members 2, which will be described later, and the rotation is transmitted to the speed reducer of the gear case 7.

Two rotating members 12 are provided. One rotating member 12 is attached to one rotating shaft 3, and the other rotating member 12 is attached to the other rotating shaft 3. The two rotating members 12 are arranged to sandwich the piston rod 14 therebetween. In other words, one rotating member 12 and the other rotating member 12 are opposed to each other. The rotating member 12 rotates in conjunction with the rotation of the rotating shaft 3, with the rotation center being at a position offset from the center of the rotating shaft 3.

The other end of the piston rod 14 is attached between two rotating members 12 .

As shown in FIG. 11, the rotating member 12 is formed so that its outer periphery is oval.

Next, a lubricating oil supply operation in the elevator hoisting machine 1 equipped with the oil supply device 8 configured as described above will be explained. Among the lubricating oil supply operations, the operations of the pump 10 that are different from those in the first embodiment will be described.

As shown in FIG. 11, the two rotating members 12 rotate in the direction indicated by arrow r3 in FIG. 11 in conjunction with the rotation of the rotating shaft 3, with the rotation center being at a position offset from the center of the rotating member 12. When the rotating member 12 rotates 180 degrees from the rotational position P5 shown in FIG. 11, it moves to the rotational position P6 shown in FIG. 12. When the rotating member 12 further rotates 180 degrees from the rotational position P6, it moves to the rotational position P5.

When the rotating member 12 rotates and moves from the rotating position P5 to the rotating position P6, the rotating member 12 moves the piston 15 downward via the piston rod 14. When the rotating member 12 further rotates and moves from the rotational position P6 to the rotational position P5, the piston 15 is urged by the spring 17 and moves upward. As the rotating member 12 rotates in this manner and moves between the rotational position P5 and the rotational position P6, the piston 15 repeats vertical movement.

Even in the oil supply device 8 shown in the third embodiment configured as described above, the lubricating oil leaked from the gear case 7 is transferred to the gear case 7 similarly to the oil supply device 8 shown in the first embodiment. It can be supplied to the housed reducer. In other words, even if the lubricating oil leaks from the gear case 7 and the lubricating oil in the gear case 7 gradually decreases, the lubricating oil can be automatically replenished because the pump 10 operates in conjunction with the rotation of the rotating shaft 3. . By supplying the lubricating oil, it is possible to suppress the occurrence of damage to the gears of the reduction gear.

Embodiment 4.
The oil supply device 8 in the fourth embodiment differs from the first embodiment in that the rotating member 12 is attached to the rotating shaft 6 of the sheave 5. The differences will be explained below.

As shown in FIGS. 13 and 14, the rotating shaft 6 is provided at a lower position than the rotating shaft 3 in the height direction of the gear case 7. Therefore, the lubricating oil in the gear case 7 tends to leak from the gap between the rotating shaft 6 and the gear case 7.

The recovery unit 9 is arranged directly below the rotating shaft 6. The lubricating oil that has passed through the gap between the rotating shaft 6 and the gear case 7 and leaked from the gear case 7 is recovered by the recovery section 9 .

As shown in FIG. 15, the rotating member 12 is formed into a disk shape so that its outer periphery is circular, and is attached to the rotating shaft 6. The rotating shaft 6 passes through an eccentric position of the rotating member 12. Therefore, the rotating member 12 rotates in conjunction with the rotation of the rotating shaft 6, with the rotation center being at a position shifted from the center of the rotating member 12.

The pump 10 causes the lubricating oil collected by the collection unit 9 to flow into the supply pipe 11 by rotating the rotating member 12 in conjunction with the rotation of the rotating shaft 6 .

Even in the oil supply device 8 shown in the fourth embodiment configured in this way, the lubricating oil leaked from the gear case 7 is transferred to the gear case 7 similarly to the oil supply device 8 shown in the first embodiment. It can be supplied to the housed reducer. In other words, even if the lubricating oil leaks from the gear case 7 and the lubricating oil in the gear case 7 gradually decreases, the lubricating oil can be automatically replenished because the pump 10 operates in conjunction with the rotation of the rotating shaft 6. . By supplying the lubricating oil, it is possible to suppress the occurrence of damage to the gears of the reduction gear.

Further, in the oil supply device 8 according to the fourth embodiment, a rotating member 12 is attached to the rotating shaft 6 of the sheave 5. Since the pump 10 can flow the lubricating oil collected by the collection unit 9 into the supply pipe 11 by rotating the rotating shaft 6, there is no need to provide a new electric motor to operate the pump 10.

Hereinafter, various aspects of the present disclosure will be collectively described as supplementary notes.
(Additional note 1)
a collection unit that collects lubricating oil leaking from the gear case housing the reducer;
a supply pipe that supplies the lubricating oil to the speed reducer;
A pump comprising a rotating member attached to a rotating shaft of a hoisting machine, and causing the rotating member to rotate in conjunction with rotation of the rotating shaft to flow the lubricating oil collected by the recovery section into the supply pipe. Oil supply system for elevator hoisting machines.
(Additional note 2)
a collection unit that collects lubricating oil leaking from the gear case housing the reducer;
a cylinder having an inlet through which the lubricating oil flows and an outlet through which the lubricating oil flows out;
a supply pipe connected to the outflow port and supplying the lubricating oil flowing out from the outflow port to the speed reducer;
a piston rod having one end disposed within the cylinder and the other end protruding from the cylinder;
a piston attached to the one end of the piston rod, in close contact with the inner cylindrical surface of the cylinder all around, and movable in the axial direction of the cylinder;
an elastic member that urges the piston in a first direction from the one end to the other end of the piston rod;
a rotating member that is attached to a rotating shaft of a hoist and moves the piston in a second direction from the other end to the one end of the piston rod via the piston rod;
When the piston moves in the first direction, the lubricating oil is caused to flow into the cylinder from the collection section through the inlet, and when the piston moves in the second direction, the lubricating oil is caused to flow into the cylinder through the inlet. a first valve that prevents oil from flowing out from inside the cylinder through the inlet and into the recovery section;
When the piston moves in the first direction, the lubricating oil is suppressed from flowing in the direction from the supply pipe toward the inlet, and when the piston moves in the second direction, the lubricating oil is suppressed from flowing in the direction toward the inlet. and a second valve for causing the oil to flow out in the direction of sending the oil to the supply pipe.
(Additional note 3)
The oil supply device for an elevator hoisting machine according to appendix 2, further comprising a third valve provided in the supply pipe to suppress the lubricating oil from flowing in a direction toward the outlet.
(Additional note 4)
The oil supply device for an elevator hoisting machine according to appendix 2 or 3, further comprising a roller provided at the other end of the piston rod, in contact with the rotating member, and rotating in conjunction with the rotation of the rotating member. .
(Appendix 5)
The oil supply device for an elevator hoisting machine according to any one of Supplementary Notes 2 to 4, wherein the elastic member is formed of metal and is provided within the cylinder.
(Appendix 6)
The oil supply device for an elevator hoist according to any one of Supplementary Notes 1 to 5, wherein the rotating shaft is a rotating shaft of an electric motor.
(Appendix 7)
The oil supply device for an elevator hoisting machine according to any one of Supplementary Notes 1 to 5, wherein the rotating shaft is a rotating shaft of a sheave.
(Appendix 8)
a rotating shaft;
A gear case containing the reducer,
a collection unit that collects lubricating oil leaked from the gear case;
a supply pipe that supplies the lubricating oil to the speed reducer;
a pump comprising a rotating member attached to the rotating shaft, and causing the lubricating oil collected by the recovery unit to flow into the supply pipe by rotating the rotating member in conjunction with the rotation of the rotating shaft. Hoisting machine for elevators.
(Appendix 9)
a rotating shaft;
A gear case containing the reducer,
a collection unit that collects lubricating oil leaked from the gear case;
a cylinder having an inlet through which the lubricating oil flows and an outlet through which the lubricating oil flows out;
a supply pipe connected to the outflow port and supplying the lubricating oil flowing out from the outflow port to the speed reducer;
a piston rod having one end disposed within the cylinder and the other end protruding from the cylinder;
a piston attached to the one end of the piston rod, in close contact with the inner cylindrical surface of the cylinder all around, and movable in the axial direction of the cylinder;
an elastic member that biases the piston in a first direction from the one end to the other end of the piston rod;
a rotating member that is attached to a rotating shaft of a hoist and moves the piston in a second direction from the other end to the one end of the piston rod via the piston rod;
When the piston moves in the first direction, the lubricating oil is caused to flow from the recovery section into the cylinder through the inlet, and when the piston moves in the second direction, the lubricating oil is caused to flow into the cylinder through the inlet. a first valve that prevents oil from flowing out from inside the cylinder through the inlet and into the recovery section;
When the piston moves in the first direction, the lubricating oil is prevented from flowing back toward the inlet port, and when the piston moves in the second direction, the lubricating oil is prevented from flowing back into the supply pipe. A hoisting machine for an elevator, comprising a second valve that causes the flow to flow in the sending direction.

1 elevator hoist, 2 electric motor, 3 rotating shaft, 5 sheave, 6 rotating shaft, 7 gear case, 8 oil supply device, 9 recovery section, 10 pump, 11 supply pipe, 12 rotating member, 13 cylinder, 13e flow Inlet, 13f Outlet, 13h Inner cylinder surface, 14 Piston rod, 15 Piston, 16 Roller, 17 Spring, 18 First valve, 19 Second valve, 21 Third valve

Claims (9)

a collection unit that collects lubricating oil leaking from the gear case housing the reducer;
a supply pipe that supplies the lubricating oil to the speed reducer;
A pump comprising a rotating member attached to a rotating shaft of a hoisting machine, and causing the rotating member to rotate in conjunction with rotation of the rotating shaft to flow the lubricating oil collected by the recovery section into the supply pipe. Oil supply system for elevator hoisting machines. a collection unit that collects lubricating oil leaking from the gear case housing the reducer;
a cylinder having an inlet through which the lubricating oil flows and an outlet through which the lubricating oil flows out;
a supply pipe connected to the outflow port and supplying the lubricating oil flowing out from the outflow port to the speed reducer;
a piston rod having one end disposed within the cylinder and the other end protruding from the cylinder;
a piston attached to the one end of the piston rod, in close contact with the inner cylindrical surface of the cylinder all around, and movable in the axial direction of the cylinder;
an elastic member that urges the piston in a first direction from the one end to the other end of the piston rod;
a rotating member that is attached to a rotating shaft of a hoist and moves the piston in a second direction from the other end to the one end of the piston rod via the piston rod;
When the piston moves in the first direction, the lubricating oil is caused to flow into the cylinder from the collection section through the inlet, and when the piston moves in the second direction, the lubricating oil is caused to flow into the cylinder through the inlet. a first valve that prevents oil from flowing out from inside the cylinder through the inlet and into the recovery section;
When the piston moves in the first direction, the lubricating oil is suppressed from flowing in the direction from the supply pipe toward the inlet, and when the piston moves in the second direction, the lubricating oil is suppressed from flowing in the direction toward the inlet. and a second valve for causing the oil to flow out in the direction of sending the oil to the supply pipe. The oil supply device for an elevator hoisting machine according to claim 2, further comprising a third valve provided in the supply pipe to suppress the lubricating oil from flowing in a direction toward the outlet. The oil supply for an elevator hoisting machine according to claim 2 or 3, further comprising a roller provided at the other end of the piston rod, in contact with the rotating member, and rotating in conjunction with rotation of the rotating member. Device. The oil supply device for an elevator hoisting machine according to claim 2 or 3, wherein the elastic member is made of metal and provided within the cylinder. The oil supply device for an elevator hoisting machine according to any one of claims 1 to 3, wherein the rotating shaft is a rotating shaft of an electric motor. The oil supply device for an elevator hoisting machine according to any one of claims 1 to 3, wherein the rotating shaft is a rotating shaft of a sheave. a rotating shaft;
A gear case containing the reducer,
a collection unit that collects lubricating oil leaked from the gear case;
a supply pipe that supplies the lubricating oil to the speed reducer;
a pump comprising a rotating member attached to the rotating shaft, the rotating member rotating in conjunction with the rotation of the rotating shaft to flow the lubricating oil collected by the recovery section into the supply pipe. Hoisting machine for elevators. a rotating shaft;
A gear case containing the reducer,
a collection unit that collects lubricating oil leaked from the gear case;
a cylinder having an inlet through which the lubricating oil flows and an outlet through which the lubricating oil flows out;
a supply pipe connected to the outflow port and supplying the lubricating oil flowing out from the outflow port to the speed reducer;
a piston rod having one end disposed within the cylinder and the other end protruding from the cylinder;
a piston attached to the one end of the piston rod, in close contact with the inner cylindrical surface of the cylinder all around, and movable in the axial direction of the cylinder;
an elastic member that urges the piston in a first direction from the one end to the other end of the piston rod;
a rotating member that is attached to a rotating shaft of a hoist and moves the piston in a second direction from the other end to the one end of the piston rod via the piston rod;
When the piston moves in the first direction, the lubricating oil is caused to flow from the recovery section into the cylinder through the inlet, and when the piston moves in the second direction, the lubricating oil is caused to flow into the cylinder through the inlet. a first valve that prevents oil from flowing out from inside the cylinder through the inlet and into the recovery section;
When the piston moves in the first direction, the lubricating oil is prevented from flowing back toward the inlet port, and when the piston moves in the second direction, the lubricating oil is prevented from flowing back into the supply pipe. A hoisting machine for an elevator, comprising a second valve that causes the flow to flow in the sending direction.

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