JPH0689792B2 - Fitting detection device for hydraulic clutch for ship - Google Patents

Description

The present invention relates to a device for detecting the on / off engagement of a hydraulic clutch for a ship.

[Prior art]

Conventionally, to detect the on or off engagement of the clutch,
A single engagement sensor is provided in the oil passage of the clutch actuator, and if the engagement signal is obtained from the engagement sensor, clutch on is detected, and if the engagement signal is not obtained, clutch off is detected.

[Problems of conventional technology]

As described above, with a single engagement sensor, the engagement sensor is erroneously detected to be in the neutral state by turning off the engagement sensor due to the resonance of hydraulic pressure or vibration with respect to the machine, for example, even in the neutral state, and the hydraulic clutch is released. It sometimes malfunctioned.

[Object of the Invention]

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a hydraulic clutch engagement detection device that accurately detects engagement of the clutch on or off and is robust against failure.

[Structure of Invention]

The present invention relates to a hydraulic clutch interposed between an engine and a propeller, switching means for switching on / off of the hydraulic clutch, and hydraulic oil for controlling hydraulic oil of the hydraulic clutch according to switching of the clutch switching means. A marine hydraulic clutch having a control means; a first clutch engagement sensor including a first piston valve that balances the hydraulic pressure of a sensor oil passage with a first valve spring having a small spring constant;
A plurality of hydraulic oil fitting detection means including a second clutch fitting sensor having a second piston valve that balances the oil pressure in the sensor oil passage with a second valve spring having a larger spring constant than the second valve spring. The hydraulic oil clutch detection means for outputting the detection results of the hydraulic oil hydraulic pressure detection means according to a predetermined logical relationship to detect ON or OFF of the hydraulic clutch. Composed of equipment.

〔Example〕

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

FIG. 2 shows an engagement detecting device for a marine hydraulic clutch. In the figure, reference numeral 1 denotes a remote control handle, which is provided with a clutch switching handle 2 and a regulator handle 3. The clutch switching handle 2 is for switching the hydraulic clutch on and off by shifting forward and backward, and when it is on, there are two types: forward traveling and backward traveling. A push-pull cable 4 is attached to the clutch switching handle 2, and the tip of the push-pull cable 4 is fixed to the tip of a switching lever 6 of the clutch actuator 5.

FIG. 3 shows the clutch actuator 5, and the switching lever 6 is in the neutral position at the position shown by the solid line in FIG.
Among the positions shown by the chain line, the upper part is forward and the lower part is backward. By switching to the forward direction above this switching lever 6,
The hydraulic oil from the pressure reducing valve 7 is supplied to the hydraulic clutch 8 and the two clutch engagement sensors 1 are engaged regardless of whether the hydraulic oil is engaged in the forward or reverse direction through the sensor oil passages 9 and 10 shown in FIG.
Configured to be sent to 1,12.

As shown in FIG. 4, both sensors 11, 12 are equipped with a piston valve 13, an electrode 14, a valve spring 15 and the like. A fixed electrode 14 'is provided opposite to the electrode 14 to form a switch. The hydraulic oil press-fitted into each of the sensors 11 and 12 moves the piston valve 13 and the electrode 14 against the valve spring 15 to detect the engagement of the clutch in both forward and reverse movements. The insertion detection signals a and b are inverted by the inverter 17 via the AND gate 16 and given to the control unit 18. The spring constant of the valve spring 15 of the forward clutch engagement sensor 11 is smaller than that of the sensor 12, and the sensor 11 has a pressure detection capability capable of detecting even a small pressure.

The rotation output of the engine 19 is transmitted to the propeller 20 via the hydraulic clutch 8.

The clutch switching handle 2 of the remote control handle 1 corresponds to the clutch switching means d of FIG. 1, the clutch actuator 5 also corresponds to the hydraulic oil control means e, and the forward clutch engagement sensors 11 and 12 are the hydraulic fluid engagement detection means. The AND gate 16 and the inverter 17 correspond to the clutch engagement detecting means g corresponding to f.

Next, the operation of this embodiment will be described.

Now, when shifting the clutch switching handle 2 forward,
The switching lever 6 is switched to the upper side, hydraulic oil is sent through the sensor oil passages 9 and 10, the piston valve 13 and the rod 14 of the clutch engagement sensors 11 and 12 are moved against the valve spring 15, and both sensors 11 The insertion detection signals a and b from the 12 and 12 are "1".
From "1" to "0" to "0", and FIG. 5 (D), (A)
"1" indicating that the forward clutch is engaged in the control unit 18 as shown in FIG.
A signal is given.

In this case, since the spring constant of the valve spring 15 of the sensor 11 is smaller, the insertion detection signal a first changes from "1" to "0" as shown in FIG. 5 (B).

In this way, the engagement of the clutch on can be known more quickly and accurately.

Also, the smaller the spring constant of the valve spring 15, the easier the failure. However, even in such a case, the other sensor 12
Since the engagement detection signal b of "0" can be obtained, the clutch engagement can be reliably detected as shown in FIG. 5 (C).

In this way, the clutch engagement detection device can be made resistant to failure.

Further, in the case where the forward clutch is engaged as shown in FIG. 5 (A), even if one of the engagement sensors 11 and 12 is erroneously turned off due to resonance of hydraulic pressure or vibration with respect to the machine (valve spring 15 This is more likely in the sensor 11 having a smaller spring constant), as shown in FIGS. 5 (B) and (C).
The engagement detection state is still maintained as a whole, and malfunction of the hydraulic clutch 8 can be prevented.

It is needless to say that a NAND gate may be used instead of the AND gate 16 and the inverter 17, and if the control unit 18 operates with the "0" level signal, the inverter 17 becomes unnecessary. Further, although the present embodiment is configured to detect the clutch engagement state regardless of whether the vehicle is moving forward or backward, this can be achieved by preparing the above two sets.

The number of these sensors may be three or more, and each sensor 11,1
In addition to having different pressure detection capabilities, 2 may be provided at a position where the diameter of the oil passage is different or at a location where the oil passage is arranged differently.

〔The invention's effect〕

As described in detail above, according to the present invention, a plurality of insertion detecting means are provided with different arrangements of the oil passages to the hydraulic clutch or different pressure detecting capacities, and the detection results from the respective insertion detecting means have a predetermined logical relationship. Since the output is detected and the engagement of the clutch is detected, even if one of the engagement sensors is accidentally turned off due to the resonance of the oil pressure or the vibration with respect to the engine, the other engagement sensor can cover it. In addition to preventing malfunctions, even if one of the insertion sensors fails, a changeover switch that can operate with a single sensor can be used to cover this with other insertion sensors, so it is highly resistant to failures. , Furthermore, if there are multiple engagement sensors, the probability that the engagement sensor will not turn on will be much lower than in the case of a single sensor, and the clutch on detection will be more accurate accordingly. It can be.

Further, since the first valve spring has a smaller spring constant than the second valve spring, the spring life of the first valve spring is usually shorter, and the first valve spring receives an external force of unexpected co-vibration due to mechanical vibration. In such a case, the second valve spring may fall into an inoperative state (damage), but even if either of them fails, at least one of them will fail first, and the probability of simultaneous failure is reduced. It is possible to reliably detect the engagement of the clutch as shown in
Further, the clutch engagement detection device can be made resistant to failure.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of the present invention, FIG. 2 is an overall configuration diagram of an engine, FIG. 3 is an overall overview diagram of a clutch actuator 5, FIG. 4 is a sectional view of clutch engagement sensors 11 and 12, and FIG.
The figure shows each state of the insertion detection signals a and b from the insertion sensors 11 and 12. 2 ... Clutch switching handle, 5 ... Clutch actuator, 8 ... Hydraulic clutch, 9,10 ... Sensor oil passage, 11,12 ... Clutch engagement sensor, 13 ... Piston valve, 14 ... Rod, 15 ...
Valve spring, 16 ... AND gate, 17 ... Inverter, 18 ... Control section, 19 ... Engine, 20 ... Propeller.

Claims (1)

[Claims] 1. A hydraulic clutch interposed between an engine and a propeller, a switching means for switching the hydraulic clutch on and off, and an operation for controlling the hydraulic oil of the hydraulic clutch in response to the switching of the clutch switching means. In a marine hydraulic clutch having an oil control means, a first clutch engagement sensor including a first piston valve that balances the hydraulic pressure of a sensor oil passage with a first valve spring having a small spring constant; A plurality of hydraulic oil fitting detection means including a second clutch fitting sensor having a second piston valve that balances the hydraulic pressure of the sensor oil passage with a second valve spring having a spring constant larger than that of the valve spring, and the plurality of hydraulic oil fitting detection means. Clutch engagement detection means for outputting each detection result of the hydraulic oil engagement detection means in a predetermined logical relationship to detect ON or OFF of the hydraulic clutch. Fitting detection device of the clutch.