JPS5819120Y2 - steering gear - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a steering device for a small boat.

This invention uses an electrohydraulic servo mechanism to control the steering angle during normal steering, and in the event of an emergency such as a failure of the electrical system or hydraulic power source, the hydraulic pump motor incorporated in the direction control pulp is used to control the steering angle. To provide a steering device that can perform steering by directly driving wheels.

Embodiments of the present invention will be described in detail below with reference to the drawings.

A is a steering stand, on the front of which a steering wheel 1 is pivotally mounted, and a steering wheel shaft 2 and a shaft 4 of a potentiometer 3 for setting a target steering angle are connected via gear trains 5 and 6.

7 is a slip coupling interposed between the gear 6 and the shaft 4.

Reference numeral 8 indicates a steering angle, which is rotated by ram-shaped cylinders 9 and 10 to set the actual steering angle.

11 is a follow-up potentiometer connected to the rudder shaft 8 by a link 12 to detect the actual rudder angle.

13 is a servo amplifier that amplifies a deviation signal, that is, an operation signal generated between both potentiometers 3 and 11, and 14 is a servo motor that is rotated by a signal from the amplifier.

b is a directional control pulp that has a built-in hydraulic pump motor driven by a servo motor 14 via a reduction gear train 15 and 16, and the boats L and R on the output side are ram-shaped. Connected to cylinders 9 and 10.

The above device constitutes an electro-hydraulic servo mechanism.

Directional control pulp b with built-in hydraulic pump motor is the second
As shown in the figure, a spring return type four-way three-position switching valve 17
and a hydraulic pump motor 19 connected thereto, the valve position moves to the left and right off-center positions in conjunction with the b rotation direction of the drive shaft 20 of the hydraulic pump motor, and the amount of discharged oil changes in proportion to the amount of rotation. It looks like this.

The shaft 20 is connected to the steering wheel shaft 2 by a dog clutch 18 .

The clutch 18 is engaged and engaged by moving the steering wheel shaft 2 forward and backward.

Reference numeral 21 denotes a scale gear for displaying the target steering angle set by the steering wheels, which is loosely fitted onto the shaft 2 and meshes with the gear 22 fixed to the shaft 4.

23 is a guideline. 24 is an indicator of the actual steering angle.

In the hydraulic power source C, 25 is a check valve, 26 is a pressure reducing valve with unloading, 27 is a hydraulic pump, 28 is a motor, 29 is a filter, 30 is a tank, and 31 is a pressure gauge.

In the above device, in the case of normal steering, the clutch 18
Turn off.

In this way, for example, when the steering wheel is turned to the left, the target steering angle is set on the potentiometer 3 via the gears 5 and 6.

On the other hand, since the actual steering angle is constantly detected by the following potentiometer 11, a deviation signal is obtained by both potentiometers 3 and 11.

This signal is amplified by a servo amplifier 13 and given to a servo motor 14.

The servo motor 14 rotates at a rotation amount proportional to this operation signal.

The rotation of the servo motor 140 is reduced by the reduction gears is, is, and rotates the drive shaft 20 of the hydraulic pump motor.

In conjunction with this direction of rotation, for example, a valve moves from a neutral position to a left offset position, and an amount of oil proportional to the amount of rotation of the shaft 20 is applied to each ram-shaped cylinder 10 through L.

As a result, the rudder shaft 8 rotates to the left, the target rudder angle and the actual rudder angle match, and the rotation of the hydraulic pump motor is stopped.

At this time, the valve returns to the neutral position, and steering to the right where the amount of discharged oil becomes zero and steering ends can be performed in the same manner as in the above case.

By the way, if the servo mechanism does not operate due to a power outage or a failure of the hydraulic pump 27 or the like, the steering wheel 1 is pushed and the clutch 18 is turned off to 0NIC to rotate the steering wheel in the desired direction.

In this way, the drive shaft 20 of the hydraulic pump motor rotates, the valve moves to the offset position by the same operation as described above, and an amount of oil proportional to the amount of rotation of the steered wheel 1 is discharged, thereby performing steering.

When the steering wheel stops rotating, the valve returns to its neutral position. Therefore, by appropriately rotating the steering wheels 1, desired steering can be completed.

The present invention is as described above, and when the original servo mechanism cannot perform steering due to a failure of the electrical system or a failure of the hydraulic power source, the hydraulic pump motor of the operating section is directly driven as an emergency. It performs steering, and its feature is that this operation can be easily performed by simply rotating the steered wheels via a clutch.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of the main parts of the same. In the diagram, 1: Steering wheel, 2: Steering wheel shaft,
3... Potentiometer for setting target steering angle, 5,
6... Gear train, 7... Slip camp ring, 8... Rudder shaft, 9.10... Ram-shaped cylinder, 11... Tracking potentiometer, 13... Servo amplifier, 14...
Servo motor, 15, 16... Reduction gear IL
17...Four-way summer position switching valve, 18...
・Clutch, 19...Hydraulic pump motor, 20
......Hydraulic pump motor drive shaft, a...
- Steering stand, b... Directional control balloon with built-in hydraulic pump motor, C... Hydraulic power source.

Claims (1)

[Scope of utility model registration request] The steering shaft 2 is connected to the drive shaft 20 of the directional control valve b with a built-in hydraulic pump motor of a servo mechanism that follows and controls the steering angle, and the steering shaft 2 is connected to the drive shaft 20 of the directional control valve b, which is a servo mechanism that follows and controls the steering angle. A steering device is connected via a clutch 18 that can be switched ON and OFF, and a potentiometer 3 for setting a target steering angle is interlocked with the steering wheel shaft 2.