JPS59120520A - Solenoid driving control circuit for power takeoff device in automobile - Google Patents

Abstract

PURPOSE:To keep off a drop in lasting quality due to the generation of heat, by making an oscillation circuit emit a duty signal by means of switching operation and clutch pedal stepping on and then connecting gear couplings, while constituting the duty ratio so as to be dropped down with a connection finish signal. CONSTITUTION:With a switch 29 of a power takeoff command device 26 turned on and a clutch pedal stepping on, a normally open contact 30 is energized with a continuous rating current, a relay 31 is set in motion, keeping a normally open contact 32 selfmaintained, whereby a normally open contact 33 of an attraction generating device 27 is closed while a limit switch 24 for a switch energizing device 28 is cut off, then the oscillation circuit 27 is impressed with voltage, and a step signal is inputted into an automatic energizing switch 36 whereby a solenoid 14 is driven with supplied power at the duty ratio 1, thus connecting gear couplings with strong attraction. After connection is over, the limit switch 24 is turned on, so that the signal of the oscillation circuit 27 is changed over to the duty ratio 0.1. With this constitution, power after connection is made to be smaller, thereby preventing the generation of heat, thus lasting quality can be improved ever so better.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solenoid drive control circuit for a power take-off device in an automobile, and more specifically, a solenoid drive control circuit for a power take-off device in an automobile, and more specifically, a solenoid drive control circuit for a power take-off device in an automobile. The present invention relates to an improvement in a connection control section of a power extraction device capable of extracting engine power from an output shaft.

As shown in Fig. 1, a power extraction device 1 extracts power from a transmission, which is a power transmission system for driving an automobile, to operate hydraulic equipment etc. mounted on an offshore vehicle. Part or all of the engine power transmitted to the driving drive wheels via a small clutch is transferred from the float 2 fixed to the drive shaft in the transmission to the gear 5 loosely fitted to the output shaft 4 in the cooling sink 3.
Through the gear coupling 6 and the gear coupling 6, the output shafts 4 are rotatably multiplexed by bearings 7.8.

This power extraction device 1 is used to extract power only when the above-mentioned equipment is manufactured and used.
Each time, the shifter 9 engages the power knob link 6 described in +iii in response to the driver's operation. That is, the shifter 9 is connected to the tooth surface 1 carved on the outer periphery of the output shaft 4 as shown by the imaginary line of the slider 10 of the gear coupling 6.
1 is moved so that it meshes with the tooth surface 11 and the mountain surface 12 integrally carved on the side surface of the gear 5.

However, the shifter 9 that moves the slider 10 is protruded from the shifter 13, and the displacement of the soft rod 13 is controlled by a solenoid 14 that is energized in response to a driver's command. This is done by displacing the actuator 16 against the spring 17 as shown by the imaginary line via the suction body 15 which is attracted by the actuator 11.

In such an operation, between the suction body 15 and the solenoid 14 that displaces it, a slide I and a roller F+ are required for the engagement of the slider 10.
Solenoid 14 must be driven with high voltage. However, since the power extraction time in the power extraction device 1 is generally long, the solenoid 14 driven by high power may heat up and be destroyed, or its lifespan may be shortened, making it unsustainable for long-term use. There is. Therefore, if a large solenoid that generates little heat is used, it is difficult to secure a mounting space and the solenoid is expensive.

The present invention has been made to solve the above-mentioned problems, and although a small solenoid is used, it is possible to generate a large initial suction force at the time of starting connection of a gear coupling, and it is possible to generate a large initial suction force when connecting a gear coupling. (1) To provide a solenoid drive control circuit for a power take-off device that can withstand long-term use without causing the solenoid to generate heat even when the solenoid is driven for many hours.

In addition, as shown in FIG. 2, when the suction force of the solenoid is larger than the amount of displacement of the actuator, for example, 7 rn rn
When the displacement is required, the solenoid is driven with high power Ph without line A to generate the attraction force Fa, and when the displacement required to maintain the gear coupling connection is almost zero, If the suction force Fb is generated by the low-power PI shown by line B, one small solenoid can provide the suction force necessary to move the shifter and hold it in the connected position, and connect the gear coupling. This is based on the fact that the heat generated by the solenoid during maintenance can be extremely suppressed.

The feature of the present invention is that an operation switch that commands the operation of the solenoid drive control circuit, a contact that is activated by pressing the cranoid petal, and a relay that is activated by receiving electric power are arranged in series. and a suction force generating means arranged in series such as a contact operated by the relay, a small solenoid driven by electric power, and an automatic energization switch, and when the actuator is displaced by a predetermined stroke due to the suction force of the solenoid. A solenoid drive control circuit for a power take-off device, comprising a switch energizing means having a limit switch that operates and an oscillation circuit that receives a signal from the limit switch and inputs a predetermined energizing signal to the automatic energizing switch. That's true.

Hereinafter, the present invention will be explained in detail based on examples thereof.

FIG. 3 is a sectional view of a power take-off device 20 to which the present invention is applied. Solenoid 1 in this connection control section 21
A protrusion 22 is implanted on the tip 16a of the actuator 16 that is sucked at step 4, and the protrusion moves in the direction of arrow 23 at stroke 11.
A limit switch 24 is provided which is automatically reset and turned ON when displaced. Note that the other configurations are the same as those in FIG. 1 described above. Figure 4 shows this connection control section 2.
In the solenoid drive control circuit 25 that operates the solenoid 1, a power extraction command means 26 in which the driver commands the extraction of UJ force, an attraction force generation means 27 by the solenoid 14, and a switch that operates the solenoid 14 at a predetermined voltage is energized. Means 28 is its main configuration.

The power extraction 11'' command means 26 will be described in detail: an ON/OFF switch 29 with which the driver commands the extraction of power; An open contact 30 and a relay 31 that operates upon receiving power are arranged in series, and further,
A normally open contact 32 for self-holding is attached in parallel to this normally open contact 30 so that the relay 31 is maintained in operation even if the normally open contact 30 is disconnected when the clutch 2/chipetal is restored. There is. This relay 31 outputs a signal that maintains the operation of the suction force generating means 27, which will be described next.

The attraction force generating means 27 includes a normally open contact 33 operated by the relay 31, a solenoid 14 driven by receiving power from the power source, and an automatic energization switch 36 consisting of a 1-run switch 34 and a solid state relay 35. arranged in series. Then, the solenoid 14 is driven by the electric power obtained according to each predetermined energization mode of the automatic energization switch 36, which is activated in response to an energization signal from the oscillation circuit 37 of the switch energization means 28, which will be described below. It is designed to generate a suction force of the magnitude of .

The switch energizing means 28 is an actuator 1 that displaces the shift j-1j throat 13 by the attraction force of the solenoid 14.
a limit switch 24 that operates when the switch 6 is displaced by a predetermined stroke; and an oscillation circuit 3 that receives a signal from the limit switch 24 and inputs a step signal or a pulse signal in a predetermined energization mode to the automatic energization switch 36.
7. In addition, the constant voltage circuit 38 or the oscillation circuit 37 is used to lower the voltage to enable the operation of the oscillation circuit 37 and remove mixed noise to maintain stable operation of the oscillation circuit 37. The person is being cared for on the power input side.

By the way, the oscillation circuit 37 mentioned above is connected to the operation switch 2.
9 and the normally open contact 33, when the limit switch 24 is in the OFF state, a step signal with a tute ratio (ratio of ON period in one cycle) of 1 is output as shown in FIG. 5(a). When the automatic energization switch 36 is continuously energized and the solenoid 14 is driven by the input power, when the limit switch 24 is ON, the Tute ratio shown in FIG. 5(b) is 0.1, for example. The power consumption of the solenoid 14 can be reduced by outputting a pulse signal 2 to intermittently energize the automatic energization switch 3G to drive the solenoid 14 in pulses.

In addition, as the automatic energization switch 36, the I.Runsista 34
The solid state relay 35 is used because the solid state relay 35 alone can control only about 2 amperes of direct current, but the solid state relay 35 can control the current of more than 10 amperes that drives the solenoid 14. If control is possible, there is no need to provide the transistor 34.

Since this embodiment is constructed as described above, it can be operated as follows.

First, in FIG. 3, when an engine (not shown) is operated and a clutch is connected, a drive shaft in the first engine rotation is rotated and the power is transmitted to the drive wheels of the vehicle. At this time, the gear 5 loosely fitted to the output shaft 4 is idling via the gear 2 fixed to the drive shaft, and the vehicle runs with only power being extracted by the power extraction device 20.

Next, when the driver wants to extract part or all of the engine power to drive hydraulic equipment (not shown) mounted on the vehicle, the driver can use the power extraction command means 26 shown in FIG.
After turning on the changeover type operation switch 29, the clutch pedal is depressed to stop the rotation of the gear 2 and enable the connection of the gear coupling 6. At this time, the operation switch 29
By energizing, the Byron lamp 39 lights up, indicating that the solenoid drive control circuit 25 is operating.

When the normally open contact 30 is connected in conjunction with the depression of the Cranona pedal, the relay 31 receives power and operates, and after that, the driver stops pressing the Clanona pedal and the pedal ti')' Even if A is performed, the normally open contact 32 maintains the self-holding state. As a result, the suction force is increased 1
When the normally open contact 33 of the power supply means 27 is connected to the relay 311 and the switch energization means 28 is closed, the oscillation circuit 37 is connected from the power supply voltage 24 to the constant voltage circuit 38. For example, in response to 12 Holt's Ichikawa 1, the step signal is automatically energized switch 7.
Enter m. That is, the base B of the I-run star 34
Since a continuous current as shown in FIG. - The actuator 16 is driven by the power supply with a tee ratio of 1 as is, and the actuator 16 is displaced by the strong attractive force Fa shown in FIG. Therefore, the shifter 9 is moved by the arrow 23 against the shift rod 13 or the spring 17.
Since the displacement is performed with a large force in the direction, the gear coupling link 6
The slider 10 moves so as to mesh with the tooth surfaces 11 and 12.

When the actuator 16 is displaced to the position where the connection of the gear coupling 6 is completed, the protrusion 22 provided thereon kicks the limit switch 24 to turn it on, and the oscillation circuit 37 generates a pulse signal with a duty ratio of O9. is input to the automatic energization switch 36.

That is, in FIG.
) is supplied with a pulsed current as shown in
and Eminoku E are intermittently energized.

The solenoid 14 is driven with a power of 1/10 of the power supply with a duty ratio of 0.1, and is able to resist the restoring force of the spring 17 without consuming a large amount of power. Therefore, the shift 1-a node 1 in 11j, which is necessary to maintain the connection of the gear coupling link 6, is generated at all times.
A displacement of 3 is maintained.

To disconnect the gear coupling link 6 and start extracting power, the driver or the operator presses the operation switch 29 (') F.
As the pyrome lamp 39 disappears and the power supply to the solenoid 14-1 is cut off, the shift rod 13 is returned to its initial position by the spring 17, and the slider 10 of the gear coupling link 6 is also returned to its original position. Return to the position of
The gear 5 idles on the output shaft 4, and the extraction of power is stopped. At this time, in order to prevent the solenoid 14 from generating a back electromotive force or from acting as a reverse voltage on the transistor 34, this back electromotive force is absorbed by the quier 1 and 40 installed in parallel with the solenoid 14. Ru.

Note that the D7, -T ratio of the oscillating word from the oscillation circuit 37 is limited to the above-mentioned 0.1 ゛7 kyakasozo + 1.
Any device that can oscillate a predetermined value necessary for link connection is fine. It goes without saying that the ON and 0 outputs of the switch 24 operated by the actuator 16 may be reversed, and the predetermined current signal from the oscillation circuit 37 to the automatic energization switch 36 may be reversed.

In the operation described above, the solenoid is operated with a large amount of power before the connection of the gear coupling link is completed, and after the connection is completed, it can be operated with a small amount of power by a pulse signal. The amount of electric power consumed while extracting power is small, so a small solenoid can be used, and it is avoided that the solenoid generates heat and is destroyed or its lifespan is shortened.

As described in detail above, the present invention includes an operation switch that commands the operation of a solenoid drive control circuit, a contact that is activated by depression of a clutch pedal, a relay that is activated by receiving electric power, and a power output command means arranged in series. , a suction force generating means in which a contact activated by the relay, a small solenoid activated by receiving electric power, and an automatic energization switch are arranged in series, and the suction force generating means is activated when the actuator is displaced by a predetermined stroke due to the suction force of the solenoid. a solenoid drive control circuit for a power take-off device, comprising: a limit/throat switch for controlling the automatic energization switch; and an oscillation circuit that receives a signal from the limit switch and inputs a predetermined energization signal to the automatic energization switch. Therefore, even though a small solenoid is used, it is possible to exert a large initial suction force when the gear coupling starts to be connected, and the solenoid does not generate heat even if the solenoid is operated for a long time after the connection is completed. The engine power can be stably extracted from the drive shaft within the transminous seam 1 at any time without having to do so.

[Brief explanation of the drawing]

Fig. 1 shows a cross section of a conventional power take-off device, Fig. 2 shows the relationship between the suction force generated by the solenoid and the displacement of the actuator when different driving forces are supplied to the solenoid, and Fig. 3 shows the present invention. Figure 4 shows the solenoid I drive control circuit for driving the connection control section, and Figures 5 (a) and (b) show the oscillation output from f7 & between oscillations. It is a signal diagram. 6 Gear coupling, 9 Shifter, 13 Shift lot making machine, 20 Power take-off device, 24 Limiter l-switch, 25 Solenoid I drive control circuit, 26-Power take-off command-1st stage, 27 Attraction force generation means, 28- Switch energizing means, 29 Operation switch, 30, 33 Normally open contact, 31 - Relay, 36 - Automatic energizing switch, 37 Oscillation circuit patent applicant Kyokuto Kaihatsu Chogyo Co., Ltd. Agent Patent attorney Katsutoshi Yoshitoshi (and one other person) No. 4 Shi1,2
5 7゜933 ＼ Figure 5 (a) 128-1

Claims (1)

[Claims] (1) In a motor vehicle power take-off device that extracts engine power through a gear coupling connected to a shift lever protruding from a shift dome by displacing shift 1 to shift rod with an energized solenoid, the driver an operation switch that commands the extraction of power; a contact that operates in conjunction with the depression of the clutch pedal; a relay that operates upon receiving power and is self-maintaining; 1;
a power extraction command means arranged in series; a contact actuated by the relay; a solenoid driven by receiving power from the power source; an automatic energization switch; an attractive force generation means arranged in series; A switch comprising: a limit switch that is activated when an actuator that displaces a shift dolomet due to suction force is displaced by a predetermined stroke; and an oscillation circuit that receives a signal from the limit switch and inputs a predetermined energization signal to the automatic energization switch. The solenoid is equipped with a current supply means, and is capable of driving the solenoid with a large amount of power before the connection of the solenoid spring is completed, and with a small amount of power using a pulse signal after the connection is completed. A solenoid drive control circuit for a power take-off device.