JP2002154765A - Hydraulic power unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic power unit capable of preventing slip of a belt wrapped around a pump pulley due to the oil leak from a hydraulic pump. SOLUTION: Intrusion of oil leaked from a rotary shaft 22 of the hydraulic pump 16 into the pump pulley 16 side is hindered by a plate 25 fitted to the rotary shaft 22 of the hydraulic pump 16 and stored there. Oil stored in the plate 25 is dispersed by centrifugal force generated by rotation of the rotary shaft 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic power unit used for a hydraulic elevator.

[0002]

2. Description of the Related Art In general, there are two types of hydraulic elevators: a direct type in which a hydraulic jack is directly moved up and down from a position directly below a car, and an indirect type in which a car is raised and lowered using a hydraulic jack, a sheave and a rope. . Both of these types include a hydraulic power unit that drives a hydraulic jack.

FIG. 6 is a schematic configuration diagram of an indirect hydraulic elevator. A hydraulic jack 1 is erected in a building, and a rope hitch 2 of the hydraulic jack 1 and a rope hitch 3 under a car are connected to a rope 6 via a plunger sheave 5 mounted on a plunger 4. Thus, the car 7 is moved up and down along the guide rail 9 in the hoistway 8 by the vertical movement of the plunger 4.

A hydraulic power unit 10, which is a drive source of the hydraulic jack 1, is generally installed in a machine room 11 adjacent to the hoistway 8, and is controlled by a control device 12. Oil from the hydraulic power unit 10 is supplied to the hydraulic jack 4 through the pipe 13.

FIG. 7 is a perspective view of the hydraulic power unit 10. As shown in FIG. 7, an oil tank 15
The oil in the oil tank 15 is supplied by a hydraulic pump 16
Is sucked and discharged. The hydraulic pump 16 is driven by an electric motor 17.

That is, the electric motor 17 has the electric motor pulley 1
The hydraulic pump 16 is provided with a pump pulley 1.
A belt 20 is wound around the electric motor pulley 18 and the pump pulley 19, and the driving force of the electric motor 17 is transmitted to the hydraulic pump 16 via the belt 20. A flow control valve (hereinafter, referred to as a valve) 21 is provided on the discharge side of the hydraulic pump 16. The valve 21 and the hydraulic jack 1 are connected by a pipe 13, and oil is supplied to the hydraulic jack 1. It has become.

FIG. 8 is a detailed view showing a connection portion between the hydraulic pump 16 and the pump pulley 19 of the hydraulic power unit 10. As shown in FIG. 8, a mechanical seal 23 prevents leakage of the oil from the hydraulic pump 16 on the rotating shaft 22 of the hydraulic pump 16 connected to the pump pulley 19.

When raising the car 7, the control device 12
When the hydraulic pump 16 is driven, the oil in the oil tank 15 is sucked, and the oil is sucked into the hydraulic jack 1 in the hoistway 8 from the pipe 13 while controlling the flow rate through the valve 21 on the discharge side.
Pump inside. As a result, the plunger 4 of the hydraulic jack 1 rises, and the car 7 thereon is pushed up and rises to the destination floor. On the other hand, when lowering the car, the control device 12 switches the valve 21 and returns the oil in the hydraulic jack 1 from the pipe 13 to the oil tank 15 while controlling the flow rate from the pipe 13 through the valve 21 by the weight of the car 7. Thereby, the car 7 together with the plunger 4 of the hydraulic jack 1
Descends to the destination floor.

[0009]

However, a mechanical seal 23 for preventing oil leakage in the hydraulic pump 16 is provided.
Is prevented by the contact pressure of the oil pump 16 with the rotating shaft 22 and the surface tension, but is not perfect, so that a small amount of oil may leak. Also, a small amount of oil may leak from the hydraulic tank 15 or the valve 21 for some reason.

The oil leaked due to damage or deterioration of the mechanical seal travels along the rotating shaft 22 of the oil pump 16 and reaches the belt 18 via the pump pulley 19. Then, the frictional force between the pump pulley 19 and the belt 18 is reduced to cause slippage. In such a case, the hydraulic pump 16 cannot be driven by the electric motor 15 via the belt 18, so that the elevator stops and the operation becomes impossible. further,
The belt 18 may be broken by friction.

It is an object of the present invention to provide a hydraulic power unit that prevents a belt wound around a pump pulley from slipping due to oil leakage from a hydraulic pump.

[0012]

According to a first aspect of the present invention, there is provided a hydraulic power unit for operating a hydraulic operating body by supplying oil in an oil tank via a pipe from a hydraulic pump for discharging oil in the oil tank. In a hydraulic power unit that raises and lowers an elevator car, an electric motor pulley provided on a rotating shaft of an electric motor that drives the hydraulic pump, a pump pulley provided on a rotating shaft of the hydraulic pump, and the electric motor pulley and the pump pulley are interlocked. And a plate attached to the rotating shaft of the hydraulic pump to prevent oil leaking from the rotating shaft of the hydraulic pump from being applied to the belt.

In the hydraulic power unit according to the first aspect of the present invention, the oil leaking from the rotary shaft of the hydraulic pump is prevented from entering the pump pulley by the plate on which the rotary shaft of the hydraulic pump is mounted, and is stored there. . The oil stored in the plate is scattered by centrifugal force due to the rotation of the rotating shaft.

According to a second aspect of the present invention, in the hydraulic power unit according to the first aspect of the present invention, a cover is provided to cover the belt from a position of a rotary shaft of the hydraulic pump between the plate and the pump pulley. And

In the hydraulic power unit according to the second aspect of the present invention, in addition to the function of the first aspect of the present invention, the cover for covering the belt prevents oil scattered by the rotation of the rotating shaft from falling on the belt.

According to a third aspect of the present invention, in the hydraulic power unit according to the first or second aspect of the present invention, a convex portion is provided in a circumferential direction of a rotary shaft of the hydraulic pump in place of the plate. And

In the hydraulic power unit according to a third aspect of the present invention, in addition to the operation of the first or second aspect, oil leaking from the rotary shaft of the hydraulic pump is provided in a circumferential direction of the rotary shaft of the hydraulic pump. The convex portion is prevented from entering the pump pulley side and is stored there. The oil stored in the convex portion is scattered by centrifugal force due to the rotation of the rotating shaft, and when a cover for covering the belt is provided, the oil scattered by the rotation of the rotating shaft is prevented from falling on the belt.

A hydraulic power unit according to a fourth aspect of the present invention is the hydraulic power unit according to the first or second aspect, wherein a concave portion is provided in a circumferential direction of a rotary shaft of the hydraulic pump instead of the plate. I do.

In the hydraulic power unit according to a fourth aspect of the present invention, in addition to the operation of the first or second aspect, oil leaking from the rotary shaft of the hydraulic pump is provided in a circumferential direction of the rotary shaft of the hydraulic pump. The recessed portion prevents entry into the pump pulley side and is stored there. The oil stored in the concave portion is scattered by centrifugal force due to the rotation of the rotating shaft, and when a cover for covering the belt is provided, the oil scattered by the rotation of the rotating shaft is prevented from falling on the belt.

A hydraulic power unit according to a fifth aspect of the present invention is a hydraulic power unit that supplies oil in the oil tank via a pipe from a hydraulic pump that discharges the oil in the oil tank to operate a hydraulic operating body to raise and lower the elevator car. In the hydraulic power unit to be driven, an electric motor pulley provided on a rotating shaft of an electric motor that drives the hydraulic pump, a pump pulley provided on a rotating shaft of the hydraulic pump, a belt for interlocking the electric motor pulley and the pump pulley, A protrusion provided along a circumferential direction of the pump pulley on the hydraulic pump side to prevent oil leaking from a rotation shaft of the hydraulic pump from being applied to the belt; and a cover for covering the belt from a position of the protrusion. And characterized in that:

In the hydraulic power unit according to the fifth aspect of the present invention, oil leaking from the rotary shaft of the hydraulic pump enters the pump pulley side by a protrusion provided along the circumferential direction of the pump pulley on the hydraulic pump side. Is stopped and stored there. The oil stored in the protrusions is scattered by centrifugal force due to the rotation of the rotating shaft. In this case, the cover that covers the belt prevents the oil scattered by the rotation of the rotating shaft from falling on the belt.

According to a sixth aspect of the present invention, in the hydraulic power unit according to the second or fifth aspect, the cover is configured such that only the belt on the pump pulley side or all the belts on the electric motor pulley side from the pump pulley side. It is characterized by covering.

In the hydraulic power unit according to the sixth aspect of the invention, in addition to the operation of the second or fifth aspect, in the case of a cover that covers only the belt on the pump pulley side, the oil scattered by the rotation of the rotary shaft is provided. From falling on the belt on the pump pulley side. On the other hand, in the case of a cover that covers all belts from the pump pulley side to the electric motor pulley side, oil scattered by rotation of the rotating shaft is prevented from falling down over the entire belt area.

[0024]

Embodiments of the present invention will be described below. FIG. 1 is an explanatory diagram of a connecting portion between a hydraulic pump and a pump pulley of a hydraulic power unit according to a first embodiment of the present invention.

As shown in FIG. 1A, the hydraulic pump 16
A plate 25 is attached to the rotating shaft 22 of the.
The plate 25 prevents oil leaking from the rotary shaft 22 of the hydraulic pump 16 from being applied to the belt 20. That is, the oil leaking from the rotary shaft 22 of the hydraulic pump 16 is stored by the plate 25 and the pump pulley 19
Intrusion to the side is prevented. The oil stored in the plate 25 is scattered by the centrifugal force generated by the rotation of the rotating shaft 22. This prevents the leaked oil from entering the pump pulley 19 side, thereby preventing the belt 18 from slipping or breaking.

If necessary, as shown in FIG. 1B, a cover 28 for covering the belt 20 from the position of the rotating shaft 22 between the plate 25 and the pump pulley 19 can be provided. The cover 28 prevents oil scattered by the rotation of the rotating shaft 22 from falling on the belt 20.

Next, a second embodiment of the present invention will be described. FIG. 2 is an explanatory diagram of a connecting portion between a hydraulic pump and a pump pulley of a hydraulic power unit according to a second embodiment of the present invention. The second embodiment is different from the first embodiment shown in FIG. 1 in that a projection 26 is provided in the circumferential direction of the rotary shaft 22 of the hydraulic pump 16 instead of the plate 25.

In FIG. 2A, a convex portion 26 is provided in the circumferential direction of the rotary shaft 22 of the hydraulic pump 16. The convex portion 26 prevents oil leaking from the rotary shaft 22 of the hydraulic pump 16 from being applied to the belt 20, and oil leaking from the rotary shaft 22 of the hydraulic pump 16
It is stored by. This prevents the leaked oil from entering the pump pulley 19 side.

The oil stored in the convex portion 26 is scattered by the centrifugal force due to the rotation of the rotating shaft 22, and the leaked oil can be prevented from entering the pump pulley 19 side.
Can be prevented from slipping or breaking.

If necessary, as shown in FIG. 2B, the rotation shaft 22 between the projection 26 and the pump pulley 19
It is also possible to provide a cover 28 that covers the belt 20 from the position of FIG. The cover 28 prevents oil scattered by the rotation of the rotating shaft 22 from falling on the belt 20.

Next, a third embodiment of the present invention will be described. FIG. 3 is an explanatory view of a connecting portion between a hydraulic pump and a pump pulley of a hydraulic power unit according to a third embodiment of the present invention. The third embodiment differs from the first embodiment shown in FIG. 1 in that a recess 27 is provided in the circumferential direction of the rotary shaft 22 of the hydraulic pump 16 instead of the plate 25.

In FIG. 3A, a concave portion 27 is provided in the circumferential direction of the rotating shaft 22 of the hydraulic pump 16. The recess 27 prevents oil leaking from the rotary shaft 22 of the hydraulic pump 16 from being applied to the belt 20. Oil leaking from the rotary shaft 22 of the hydraulic pump 16
It is stored by. This prevents the leaked oil from entering the pump pulley 19 side.

The oil stored in the concave portion 27 is scattered by centrifugal force due to the rotation of the rotating shaft 22, and the leaked oil can be prevented from entering the pump pulley 19, so that the belt 18
Can be prevented from slipping or breaking.

If necessary, as shown in FIG. 3B, the rotating shaft 22 between the concave portion 27 and the pump pulley 19 may be used.
It is also possible to provide a cover 28 that covers the belt 20 from the position shown in FIG. The cover 28 prevents oil scattered by the rotation of the rotating shaft 22 from falling on the belt 20.

Next, a fourth embodiment of the present invention will be described. FIG. 4 is an explanatory diagram of a connecting portion between a hydraulic pump and a pump pulley of a hydraulic power unit according to a fourth embodiment of the present invention. The fourth embodiment differs from the first embodiment shown in FIG. 1 in that a projection 24 is provided along the circumferential direction of the pump pulley on the hydraulic pump side instead of the plate 25, and A cover for covering the belt from a position is provided.

In FIG. 4, a projection 24 is provided along the circumferential direction of the pump pulley 19 on the hydraulic pump 16 side.
Further, a cover 28 that covers the belt 20 from the position of the protrusion 24 is provided.

The oil leaking from the rotary shaft 22 of the hydraulic pump 16 is stored in a projection 24 provided along the circumferential direction of the pump pulley 19 on the hydraulic pump 16 side. This prevents entry into the pump pulley 19 side.
The oil stored in the protrusions 24 is scattered by centrifugal force due to the rotation of the rotating shaft 22, but the oil scattered by the rotation of the rotating shaft 22 is
Is prevented from falling.

Next, a fifth embodiment of the present invention will be described. FIG. 5 is an explanatory diagram of a connection portion of a hydraulic power unit according to a fifth embodiment of the present invention with an electric motor pulley 18 and a pump pulley 19.

In FIG. 5A, the cover 28 covers only the belt 20 on the pump pulley 19 side.
The oil scattered by the rotation of the rotating shaft 22 is prevented from falling onto the belt 20 on the pump pulley 19 side by the cover 28. Since the electric motor pulley 18 is separated from the oil pump 16, the oil scattered by the rotation of the rotary shaft 22 rarely reaches. Therefore, there is no problem even if the cover 28 is provided only on the pump pulley 19 side. Since the cover 28 does not cover the motor pulley 18, the maintainability of the motor pulley 18 is improved.

In FIG. 5B, the cover 28 covers all the belts 20 from the pump pulley 19 side to the electric motor pulley 18 side. The oil scattered by the rotation of the rotation shaft 22 is prevented from falling down over the entire area of the belt 20 by the cover 28. That is, it is possible to prevent oil from falling on the belt 20 regardless of the state of the scattered oil.

[0041]

As described above, according to the present invention, the belt wound around the pump pulley can be prevented from slipping or breaking due to oil leakage from the hydraulic pump. Therefore, the hydraulic elevator can be operated safely.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a connecting portion between a hydraulic pump and a pump pulley of a hydraulic power unit according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a connecting portion between a hydraulic pump and a pump pulley of a hydraulic power unit according to a second embodiment of the present invention.

FIG. 3 is an explanatory view of a connecting portion between a hydraulic pump and a pump pulley of a hydraulic power unit according to a third embodiment of the present invention.

FIG. 4 is an explanatory diagram of a connecting portion between a hydraulic pump and a pump pulley of a hydraulic power unit according to a fourth embodiment of the present invention.

FIG. 5 is an explanatory diagram of a connection portion of a hydraulic power unit according to a fifth embodiment of the present invention with an electric motor pulley 18 and a pump pulley 19.

FIG. 6 is a schematic configuration diagram of an indirect hydraulic elevator.

FIG. 7 is a perspective view of a hydraulic power unit.

FIG. 8 is a detailed view showing a connection portion between a hydraulic pump and a pump pulley of the hydraulic power unit.

[Explanation of symbols]

1: Hydraulic jack, 2, 3: Rope hitch, 4: Plunger, 5: Plunger sieve, 6: Rope, 7: Basket,
8 hoistway, 9 guide rail, 10 hydraulic power unit, 11 machine room, 12 control device, 13 piping, 1
4 ... stand, 15 ... oil tank, 16 ... hydraulic pump, 17 ...
Electric motor, 18: electric motor pulley, 19: pump pulley, 2
0 ... Belt, 21 ... Valve, 22 ... Rotary shaft, 23 ... Mechanical seal, 24 ... Protrusion, 25 ... Plate, 26 ...
Convex, 27 ... concave, 28 ... cover

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kazuhiko Baba, 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu Office, Toshiba Co., Ltd. Terms (reference) 3F301 BA01 BB03 CA11 3F304 EA31

Claims (6)

[Claims] 1. A hydraulic power unit that supplies oil in an oil tank via a pipe from a hydraulic pump that discharges oil in an oil tank via a pipe to operate a hydraulic operating body to raise and lower an elevator car, and A motor pulley provided on a rotating shaft of a motor to be driven, a pump pulley provided on a rotating shaft of the hydraulic pump, a belt for interlocking the motor pulley and the pump pulley,
A hydraulic power unit comprising: a plate attached to a rotary shaft of the hydraulic pump to prevent oil leaking from the rotary shaft of the hydraulic pump from being applied to the belt. 2. The hydraulic power unit according to claim 1, further comprising a cover that covers the belt from a position of a rotation shaft of the hydraulic pump between the plate and the pump pulley. 3. The hydraulic power unit according to claim 1, wherein a convex portion is provided in a circumferential direction of a rotary shaft of the hydraulic pump instead of the plate. 4. The hydraulic power unit according to claim 1, wherein a concave portion is provided in a circumferential direction of a rotary shaft of the hydraulic pump instead of the plate. 5. A hydraulic power unit that supplies oil in an oil tank via a pipe from a hydraulic pump that discharges oil in an oil tank, operates a hydraulic operating body, and raises and lowers an elevator car. A motor pulley provided on a rotating shaft of a motor to be driven, a pump pulley provided on a rotating shaft of the hydraulic pump, a belt for interlocking the motor pulley and the pump pulley,
A projection provided along a circumferential direction of the pump pulley on the hydraulic pump side to prevent oil leaking from a rotation shaft of the hydraulic pump from being applied to the belt; and a cover for covering the belt from a position of the projection. And a hydraulic power unit comprising: 6. The hydraulic power unit according to claim 2, wherein the cover covers only the belt on the pump pulley side, or covers all belts on the electric motor pulley side from the pump pulley side.