JP5969323B2 - Gate up / down mechanism - Google Patents

Description

  The present invention relates to a gate raising / lowering mechanism that raises and lowers a gate of a wire drum type sluice gate using a hydraulic piston motor as a drive source.

  Conventionally, as a mechanism for raising and lowering a gate of a wire drum type sluice gate, a mechanism that raises a gate using an electric motor, an engine or a hydraulic motor as a driving source and lowers the gate using its own weight is known. . In such a wire drum type sluice gate, when the gate is lowered, the descent speed can be adjusted by adjusting the amount of oil while operating the hydraulic pump or hydraulic motor as a hydraulic brake. It is known (see Patent Document 1).

  For example, in the gate raising / lowering mechanism shown in FIG. 4, a wire 2 for suspending the gate 1 is wound around a wire drum 3, and the rotation operation of the wire drum 3 is controlled by a differential reducer 4. It has come to be.

  A switching device 6 is connected to the first input shaft 4a of the differential speed reducer 4 with a hydraulic push-up brake 5 serving as a first brake interposed therebetween. Furthermore, the switching device 6 is connected to an electric motor 7 that is a power source for normal use and an engine 8 that is a power source for emergency use.

  On the other hand, a hydraulic pump 10 is connected to the second input shaft 4b of the differential reduction gear 4 with an electromagnetic brake 9 as a second brake interposed therebetween. The electromagnetic brake 9 may be a hydraulic push-up brake. The hydraulic pump 10 is connected to a hydraulic unit 11 including an oil tank.

  In the gate ascending / descending mechanism having such a configuration, the raising of the gate 1 is performed by selecting the electric motor at the normal time using the switching device 6 and the engine 8 at the emergency time (for example, when power is lost). Power is transmitted from the drive source. On the other hand, the gate 1 is lowered by its own weight. At this time, the hydraulic pump acts as a hydraulic brake for adjusting the lowering speed.

JP 2006-97822 A

  However, the switching device provided in the gate ascending / descending mechanism having such a configuration is large, so there is a problem that a space required for arrangement becomes large, and a device itself is expensive. It was.

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is a small size that can raise and lower the gate even in the event of an emergency such as loss of power. It is to provide an inexpensive gate raising / lowering mechanism.

In order to achieve the object, the gate raising / lowering mechanism of the present invention includes a wire for suspending a gate, a wire drum around which the wire is wound, an output shaft to which the wire drum is connected, and a first drum. A differential reducer having an input shaft and a second input shaft, an electric motor connected to the first input shaft of the differential reducer, and a second input shaft of the differential reducer A hydraulic piston motor connected to the hydraulic piston unit, a hydraulic unit for driving the hydraulic piston motor, a first brake for the rotational operation of the first input shaft, and a second brake for the rotational operation of the second input shaft. comprising a brake, wherein the hydraulic unit, an oil reservoir hydraulic fluid is accumulated, the gate and the boost pressure hydraulic motor outlet side is bifurcated at the time of lowering by its own weight, the inlet side to the oil tank A boost pressure hydraulic pump that is continued and driven by the boost pressure hydraulic motor, and an engine driven hydraulic pump that operates the hydraulic piston motor when the gate is raised by the hydraulic piston motor, When the hydraulic piston motor lowers the gate by its own weight, it acts as a hydraulic brake and functions as a hydraulic pump. When the gate is lowered by its own weight, the hydraulic piston motor is connected to the outlet side of the hydraulic piston motor and the boost pressure hydraulic pressure. The boost pressure hydraulic motor is rotated by the hydraulic pressure generated by the rotation of the hydraulic piston motor by connecting to the motor inlet side, and the outlet side of the hydraulic piston motor and the boost pressure hydraulic motor branched into two branches. One side and the outlet side of the boost pressure hydraulic pump; The hydraulic oil having a boost pressure connected thereto is supplied to the hydraulic piston motor, and the other of the outlet side branched into the bifurcated portion of the hydraulic motor for boost pressure is connected to the oil tank, and a part of the hydraulic oil is supplied to the oil It is characterized by being returned to the tank .

  According to the present invention that can raise and lower the gate even in the event of an emergency such as power loss, a small and inexpensive gate raising and lowering mechanism can be provided.

FIG. 3 is a schematic diagram illustrating a gate raising / lowering mechanism according to the first embodiment. It is a circuit diagram of the hydraulic unit with which the gate raising / lowering mechanism according to Embodiment 1 is provided. 10 is a schematic diagram illustrating a gate raising / lowering mechanism according to Embodiment 2. FIG. It is a schematic diagram which shows the conventional gate raising / lowering mechanism.

  Hereinafter, the gate raising / lowering mechanism according to the first embodiment will be described in detail with reference to FIGS. 1 and 2.

  FIG. 1 is a schematic diagram illustrating a gate raising / lowering mechanism according to the first embodiment. FIG. 2 is a circuit diagram of a hydraulic unit provided in the gate raising / lowering mechanism according to the first embodiment.

  First, the configuration of the gate raising / lowering mechanism will be described with reference to FIG.

  In this gate raising / lowering mechanism, a wire 2 for suspending a gate 1 is wound around a wire drum 3, and the rotation operation of the wire drum 3 is controlled by a differential reduction gear 4. ing.

  The first input shaft 4a of the differential speed reducer 4 is connected to an electric motor 7 that is a power source for normal use with a hydraulic push-up brake 5 that is a first brake interposed therebetween. On the other hand, a hydraulic piston motor 13 is connected to the second input shaft 4b of the differential reduction gear 4 with an electromagnetic brake 9 serving as a second brake interposed therebetween. The electromagnetic brake 9 may be a hydraulic push-up brake. The hydraulic piston motor 13 is connected to the hydraulic unit 12.

  As the hydraulic piston motor 13, for example, an axial piston motor that requires a boost pressure of 0.2 Mpa or more may be used, or another type of hydraulic piston motor may be used.

  Because of this configuration, the gate ascending / descending mechanism uses a switching device for the normal power and the emergency power via the two input shafts 4a and 4b of the differential reducer 4. It is possible to use it by cutting it out completely.

  Next, the operation of each mechanism when the gate raising / lowering mechanism raises and lowers the gate 1 will be described with reference to FIGS. 1 and 2.

  When raising and lowering the gate 1 during normal operation, first, the electromagnetic brake 9 connected to the second input shaft 4b side is locked so that power is not transmitted to the hydraulic piston motor 13 side. Then, the power from the electric motor 7 is transmitted to the first input shaft 4a, and the rotation operation of the wire drum 3 is controlled via the differential speed reducer 4 to raise and lower the gate 1.

  When raising the gate 1 in an emergency, first, the hydraulic push-up brake 5 connected to the first input shaft 4a side is locked so that power is not transmitted to the electric motor 7 side, and then the hydraulic pressure is increased. The valve built in the unit 12 is operated to drive the hydraulic piston motor 13, the power from the hydraulic piston motor 13 is transmitted to the second input shaft 4 b, and the wire drum 3 is transmitted via the differential speed reducer 4. The gate 1 is raised by controlling the rotation operation.

  Specifically, first, the hydraulic push-up brake 5 is locked so that power is not transmitted to the electric motor 7 side. Next, the ball valve 12a is closed. Next, the electromagnetic brake 9 is released. Next, the ball valve 12b is opened. Next, the engine 12c is started and the pump 12d is driven.

  Thereafter, when the manual switching valve 12e is switched, the hydraulic oil stored in the oil tank 12f is supplied to the suction filter 12g, the manual switching valve 12e, the check valve 12h, the ball valve 12b, by the pump 12d driven by the engine 12c. It is sent to the first port 13a of the hydraulic piston motor 13 via the stop valve 12i.

  The hydraulic oil sent from the first port 13a to the hydraulic piston motor 13 rotates the hydraulic piston motor 13, and then the hydraulic oil is discharged from the second port 13b. The stop valve 12j, the relief valve 12k, The oil is returned to the oil tank 12f through the return filter 12l.

  The hydraulic piston motor 13 driven in this way rotates the wire drum 3 in the direction of raising the gate 1 via the second input shaft 4 a of the differential reduction gear 4, and winds the wire 2 around the wire drum 3. take.

  When the gate 1 is lowered in an emergency, first, the hydraulic push-up brake 5 connected to the first input shaft 4a side is locked to prevent power from being transmitted to the electric motor 7 side, and then the electromagnetic The brake 9 is released, and the valve built in the hydraulic unit 12 is operated so that the hydraulic piston motor 13 acts as a hydraulic brake and a hydraulic pump, and the gate 1 is lowered by its own weight.

  Specifically, first, the hydraulic push-up brake 5 is locked so that power is not transmitted to the electric motor 7 side. Next, the ball valve 12b is closed. Next, the ball valve 12a is opened. Then, the electromagnetic brake 9 is released and the gate 1 is lowered by its own weight.

  The hydraulic piston motor 13 includes a wire 2 suspending the gate 1, a wire drum 3 around which the wire 2 is wound, and a second input shaft 4 b of the differential reduction gear 4 connected to the wire drum 3. , Through which the gate 1 is rotated in the reverse direction.

  At this time, the hydraulic oil is first discharged from the first port 13a of the hydraulic piston motor 13, and is sent to the boost pressure hydraulic motor 12m via the stop valve 12i and the ball valve 12a.

  Next, the hydraulic fluid sent to the boost pressure hydraulic motor 12m is discharged after driving the boost pressure hydraulic motor 12m, and is branched into two branches through the check valve 12n. Then, one of the hydraulic oil branched into two branches is sent to the second port 13b of the hydraulic piston motor 13 through the stop valve 12j. On the other hand, the other of the hydraulic oil branched into two branches is returned to the oil tank 12f through the relief valve 12k and the return filter 12l.

  By the way, the boost pressure hydraulic motor 12m is connected to the boost pressure hydraulic pump 12o so that the power can be transmitted. The boost pressure hydraulic pump 12o causes the hydraulic oil stored in the oil tank 12f to merge with one of the branched hydraulic oil discharged from the boost pressure hydraulic motor 12m via the suction filter 12p and the check valve 12q. The boost pressure is applied to the second port 13 b of the hydraulic piston motor 13.

  Because of such a configuration, the hydraulic piston motor 13 can sufficiently function as a hydraulic brake when the gate 1 is lowered by its own weight.

  At this time, the hydraulic oil discharged from the boost pressure hydraulic motor 12m does not return to the oil tank 12f, and the hydraulic oil of the hydraulic piston motor 13 is kept at a certain level (for example, a pressure of about 0.2 Mpa). Is returned to the second port 13b. Therefore, the amount of hydraulic oil supplied from the oil tank 12f via the boost pressure hydraulic pump 12o can be suppressed to only an amount necessary for controlling the rise in the oil temperature. As a result, the hydraulic unit 12 can be reduced in size, and as a result, the entire mechanism can be further reduced in size.

  In this way, the gate ascending / descending mechanism can be used by completely separating the main operation that is normally performed and the preliminary operation that is extremely performed without requiring an expensive switching device. And can be downsized due to space saving.

  Hereinafter, the gate ascending / descending mechanism according to the second embodiment will be described in detail with reference to FIG. In addition, since the gate raising / lowering mechanism according to the present embodiment has substantially the same configuration as the gate raising / lowering mechanism of Example 1 and the lead frame of Example 1 except for the mechanism on the second input shaft side, Similar members are denoted by the same reference numerals, and detailed descriptions thereof are omitted. A detailed description of the flow of hydraulic oil in the hydraulic unit when the gate is raised or lowered in an emergency is also omitted.

  As shown in FIG. 3, a hydraulic piston motor 14 incorporating a mechanical brake is connected to the second input shaft 4 b of the differential reduction gear 4.

  As this hydraulic piston motor 14, for example, an axial piston motor that requires a boost pressure of 0.2 Mpa or more may be used, or another type of hydraulic piston motor may be used.

  The mechanical brake built in the hydraulic piston motor 14 generates, for example, a brake torque by a force that presses the friction plate against the counterpart plate with a spring when the brake is operated, and a force that matches the spring release force or more is applied to the brake release port. In this case, the brake plunger presses the spring, the friction plate is separated from the mating plate, and the brake is released.

  The gate ascending / descending mechanism configured as described above does not require an expensive switching device, but also has a small number of mechanisms arranged on the second input shaft 4b side. Can be achieved.

  The gate ascending / descending mechanism of the present invention is extremely useful in practical use because it can realize cost reduction and space saving.

DESCRIPTION OF SYMBOLS 1 Gate 2 Wire 3 Wire drum 4 Differential reduction gear 4a 1st input shaft 4b 2nd input shaft 5 Hydraulic push-up brake 6 Switching device 7 Electric motor 8 Engine 9 Electromagnetic brake 10 Hydraulic pump 12, 11 Hydraulic unit 12a, 12b Ball Valve 12c Engine 12d Pump 12e Manual switching valve 12f Oil tank 12g, 12p Suction filter 12h, 12n, 12q Check valve 12i, 12j Stop valve 12k Relief valve 12l Return filter 12m Boost pressure hydraulic motor 12o Boost pressure hydraulic pump 13, 14 Hydraulic piston Motor 13a First port 13b Second port

Claims (1)

A wire to suspend the gate,
A wire drum around which the wire is wound;
A differential reducer having an output shaft to which the wire drum is connected, a first input shaft and a second input shaft;
An electric motor coupled to the first input shaft of the differential reducer;
A hydraulic piston motor coupled to the second input shaft of the differential reducer;
A hydraulic unit for driving the hydraulic piston motor;
A first brake for rotational movement of the first input shaft;
A second brake for rotational movement of the second input shaft;
Equipped with a,
The hydraulic unit includes an oil tank in which hydraulic oil is stored, a boost pressure hydraulic motor having a bifurcated outlet side when the gate is lowered by its own weight, and an inlet side connected to the oil tank for the boost pressure A boost pressure hydraulic pump driven by a hydraulic motor, and an engine-driven hydraulic pump that operates the hydraulic piston motor when the gate is raised by the hydraulic piston motor,
The hydraulic piston motor acts as a hydraulic brake when the gate is lowered by its own weight and functions as a hydraulic pump;
When lowering the gate by its own weight, the boost pressure hydraulic motor is rotated by the hydraulic pressure generated by the rotation of the hydraulic piston motor by connecting the outlet side of the hydraulic piston motor and the inlet side of the boost pressure hydraulic motor. The hydraulic piston motor is supplied with the boost pressure by connecting one of the inlet side of the hydraulic piston motor and one of the bifurcated outlet side of the boost pressure hydraulic motor and the outlet side of the boost pressure hydraulic pump. A gate ascending / descending mechanism , wherein the other side of the bifurcated outlet side of the boost pressure hydraulic motor is connected to the oil tank to return a part of the hydraulic oil to the oil tank .

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