JPS5953233A - Control device for power take-off device in automobile - Google Patents

Abstract

PURPOSE:To reduce heat generation due to longtime energization to a solenoid in a device for connecting and disconnecting a power take-off device through the energization of the solenoid, by energizing, upon completion of powr connection, the solenoid with the use of the remaining power which is consumed through a resistor. CONSTITUTION:When a clutch switch CS is turned on by operating a clutch pedal after an operating switch S is closed, a relay R is energized to turn on switches (r1) through (r2) so that the relay R is self-energized. Further, due to the switch (r3) being closed, a solenoid SOL is energized through a timer switch TS so that an actuator element 13 moves to the right. Therefore, a slider 8 is engaged with both intermediate gear 6 and spline 7 by means of a shifter 9, and therefore, rotation is transmitted from a drive gear 16 to an output shaft 3. Simultaneously, a timer TM is actuated, and then the timer switch TS is closed after the elapse of a setting time of the timer TM. Accordingly, the remaining power which is consumed through a resistor 23, is fed to the solenoid SOL.

Description

[Detailed description of the invention] The present invention operates an actuator by energizing a solenoid,
This allows you to connect the power take-off device by directly operating the shifter.
The present invention relates to a control device for a power take-off device in an automobile, which is capable of controlling disconnection.

Generally, in a device that operates a solenoid to directly control the connection and disconnection of the power take-off device, the suction body at the base of the actuator and this suction body are sucked at the beginning of switching the power take-off device from disconnection to connection. Since the distance H to the solenoid is long, a large suction force (operating force) F is required, so it is necessary to operate the solenoid with a high voltage.

On the other hand, since it is necessary to keep the power take-off device in contact for a long time, if the solenoid is operated with the high voltage for a long time, the operating force F will decrease due to heat generation of the solenoid. However, there is a problem in that it is difficult to maintain the power take-off device in contact with the power take-off device.

Therefore, it is necessary to use a large solenoid that does not reduce operating force due to heat generation, but when using this large solenoid, problems remain in that it is difficult to secure mounting space and it is expensive.

In view of the above problems, the present invention is a control device for a power take-off device that can increase the initial operating force using a small solenoid, does not generate heat even if the solenoid is energized for a long time, and does not reduce the operating force. It provides:

To explain the embodiment below with reference to the drawings, Fig. 1 shows a power take-off device (1), and to explain this power take-off device (1), (2) is a casing, (3) is a bearing (4) (4) The output shaft is rotatably supported by the casing (2) via the output shaft (3).
A large-diameter intermediate gear (5) and a small-diameter intermediate gear (6) are provided integrally and rotatably.

(7) is a spline formed on the output shaft (3), and this spline (7) has the same diameter and the same tooth profile as the small-diameter intermediate gear (6).

(8) is a slider that is slidably fitted to the spline (7), and this slider (8) is in a contact position (double-dashed line position W) and the spline (7) separated from the intermediate gear (6).
), the output shaft (3) and the intermediate gears (5) and (6) are integrally connected in the engaged position, and in the disconnected position, the output shaft (3) and the intermediate gears (5) and (6) are connected integrally. Shaft (3) and intermediate gear (
5) and (6) are mutually rotatable.

(9) is a shifter that moves the slider (8), and this shifter (9) is attached to the output shaft (
The shift rod (1) is movably supported in parallel with the shift rod (1).
o).

(11) is a solenoid body attached to the casing (2) via the mounting piece (12), and the solenoid (SQL)
When energized, the suction body (] at the base of the actuator (13)
4) toward the solenoid (Sol), thereby causing the actuator (13) to protrude forward and moving the shifter (10) integrated with the shifter (9) forward.

In addition, (15) is a spring that moves the forward shift rod (10) backward when the power to the solenoid (SQL) is cut off, and (16) is always engaged with the large diameter intermediate gear (5). This is the drive gear on the transmission side.

Next, the electric system for controlling the energization vI of the solenoid (SQL) will be explained with reference to FIG. 2. (B) is a 24V battery, (17) is the main circuit connected to the battery (B),
(]8) is a clutch switch, such as a pressure switch or a limit switch, whose one end is connected to the main circuit (17) and which is connected and disconnected in conjunction with the movement of an intermediate operation switch (S) and a clutch pedal (not shown). (C5) is connected in series, and the other end of this circuit (18) is connected to the relay (
Connect to R).

(19) is a relay (R) even if the thalassochipetal operation is removed.
This holding circuit (1
9) is equipped with a first relay switch (rl) that operates in response to the activation of the relay (R), and this first relay switch (rl) operates in conjunction with the clutch pedal. It is provided in parallel with the clutch switch (C3).

(20) shows a second auxiliary circuit whose one end is connected to the main circuit (17) and the other end is connected to the timer (TM), and the relay (R) is located in the middle of this second auxiliary circuit (2o). A second relay switch (r2) is interposed which is in contact when activated.

(21) shows an operating circuit that connects one end to the main circuit (17) and the other end to the solenoid (SQL),
This operating circuit (21) is a circuit (22) interposed with a third relay switch (r3) that operates in response to the relay (R).
When the timer (TM) is activated, the timer switch (TS) is switched to disconnect after the set time has elapsed.
) and a resistor (23) in parallel (24)
).

Figure 3 shows the operating force F on the actuator (13) and the actuator (13) between the suction body (14) at the base of the actuator (13) and the solenoid (SQL) in the case of voltages 24V and 8.3V.
It is clear from this that when the stroke H is large, the operating force F cannot be increased unless the voltage is increased, and when the stroke Lr is small, It can be understood that even if the voltage is low, the operating force F becomes large.

In the present invention, with the above configuration, when the current operation switch (S) is connected, and then the clutch valve is operated to connect the clutch valve (CS), the current from the battery (B) is transferred to the first auxiliary circuit (18 ), the relay (R) is energized. At this time, due to the operation of the relay (R), the first relay switch (rl), the second relay switch (r2), and the third relay switch (r3) corresponding to the relay (R) are all connected.

Thereafter, even if the clutch switch (CS) is turned off by no longer operating the tarlatch pedal, the first relay switch (rl) of the holding circuit (19) is closed, so that the relay (R) remains energized.

As mentioned above, the third relay switch (
When r3) is connected, the current from the battery (B) passes through the third relay switch (r3) and the timer switch (TS), which is already connected, to the solenoid (SQL), and at this time the voltage of 24V is applied. are all solenoids (S
QL).

As shown in Fig. 3, when the stroke H of the actuator (13) is, for example, 7 mm, the operating force F corresponding to 24V is approximately 15 kg, and this large force causes the shift rond (10) to When the shifter (9) is operated to move, the slider (8) moves from the solid line position to the two-dot chain line position and engages with the spline (7) and the small-diameter intermediate gear (6). ) is transmitted to the output shaft (3) through the large and small intermediate gears (5) (6), the slider (8) and the spline (7).
is driven.

On the other hand, the second auxiliary circuit (20) is activated by the relay (R).
Since the 217th race switch (r2) inside is also connected, the timer (TM) is activated at this time, and after the timer setting time has elapsed, the timer switch (TM) in the activation circuit (21) is activated.
TS) is switched to disconnected. At this time, the current to the solenoid (SQL) flows through the third relay switch (r3) and the resistor (23), so the battery (B)
The voltage of 24V is reduced by a resistor (23) to a part of
．． 7V is consumed and the remaining 8.3V is used by the solenoid (SQL
) will be consumed.

The position where the stroke H is 0, that is, the power take-off device (
At the position where 1) is tangent, the voltage is 8.3v as shown in Figure 3.
The operating force F is as large as approximately 20 kg, which allows the power take-off device (1) to be kept in contact, and because the voltage is low, even if the solenoid (Sol) is energized for a long time,
There is no heat generation in the solenoid (501,), and there is no decrease in the operating force F.

When turning off the power take-off device (1), turn off the operation switch (S), and the solenoid (SOl) will no longer be energized, and at this time, the force of the spring (15) will cause the shifter (9) to move backward. The power take-off device (1)
It will be refused.

As described above, even if a small solenoid is used, the present invention can increase the operating force F by applying a high voltage to the solenoid in the initial stage of actuating the actuator, and also shortens the stroke (■) when the power take-off device is in contact with the solenoid. When the voltage reaches O, a portion of the battery voltage is consumed in advance by a resistor after the time set by the timer has elapsed, and the remaining voltage is given to the solenoid, so there is no heat generation when the solenoid is energized for a long time. , thereby not reducing the operating force F,
The power take-off device can be reliably kept in contact.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the power take-off device, Fig. 2 is an electrical system diagram that is the main part of the present invention, and Fig. 3 is a diagram showing the relationship between the stroke H of the actuator and the operating force F of the solenoid. . (1) is the power take-off device, (9) is the shifter, (13) is the actuator, (21) is the actuation circuit, (22) is the circuit, (23) is the actuator, (21) is the actuation circuit, (22) is the circuit,
) is the resistor, (S) is the operation switch, (C5) is the clutch switch, (r3) is the third relay switch, (TM)
is a timer, (TS) is a timer switch, (SQL)
is a solenoid. Applicant Kyokuto Kaihatsu Kogyo Co., Ltd. Figure 1

Claims (1)

[Claims] In a device that operates the actuator by energizing the solenoid, which directly operates the shifter to control the connection and disconnection of the power take-off device, there is a thalasso-switch that is linked to the operation of the operation switch and clutch pedal. A circuit equipped with a relay switch that is activated and switched to closed when each of A control device for a power take-off device in an automobile, wherein an operating circuit is constituted by a parallel circuit in which a timer switch and a resistor are arranged in parallel, and the operating circuit controls energization of the solenoid.