JPS5953234A - 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 power connection, the solenoid with the use of the remaining power which is consumed through a resistor. CONSTITUTION:When a first switch LS1 is turned on by operating a clutch pedal after an oprating switch S is closed, a first relay LS1 is energized to turn on switches (r1), (r1') so that the relay R is self-energized. Further, due to the switch (r1) being turned on, a solenoid SOL is energized through a normally closed switch (r2) 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 15 to an output shaft 3. Simultaneously, a second switch LS2 is turned on by an actuator element 12 to energize a relay R2 so that the switch (r2) is opened. Accordingly, the remaining power which is consumed through a resistor 22, 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-mentioned problems, the present invention provides a control device for a power extraction device that can increase the initial operating force using a small solenoid, does not generate heat, and does not reduce the operating force even when the solenoid is energized for a long time. This is what we provide.

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), and on this output shaft (3) there are a large diameter intermediate gear (5) and a small diameter intermediate gear (6) in the form of a rod. It is rotatably provided.

(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) and the intermediate gear (6) to separate from the subline (7).
), the output shaft (3) and intermediate gears (5) and (6) are integrally connected in the engaged position, and in the disconnected position, the output shaft (3) and intermediate gear (
5) and (6) are mutually rotatable.

(9) is a shifter that moves the slump (8), and this shifter (9) is attached to the output shaft (3) at the top of the casing (2).
) is movably supported in parallel with the shift rod (10
) is installed.

(11) is a solenoid body attached to the casing (2) via a mounting piece, and when the solenoid (5QL) is energized, the suction body (13) at the base of the actuator (12) is moved toward the solenoid (SQL) side. This causes the actuator (1
2) to project forward and move the shift rod (10) integrated with the shifter (9) forward.

In addition, (14) is a spring that moves the forward shift rod (10) backward when the power to the solenoid (SQL) is cut off, and (15) is always engaged with the large diameter intermediate gear (5). This is the drive gear on the transmission side.

Next, the electrical system that controls the energization of the solenoid (SQL) will be explained with reference to FIG. 2. (B) is a 24V battery, (16) is the main circuit connected to the battery (B), (
17) has one end connected to the main circuit (16), and is a first switch (such as a pressure switch or a limit switch) that is connected and disconnected in conjunction with the movement of the intermediate operation switch (S) and clutch pedal (not shown). The other end of this circuit (17) is connected to the 11th J-ray (R1).

(18) is the first relay (
This holding circuit (18) includes a second switch (r
1) is provided in parallel with the first switch (LSI) which operates in conjunction with the taratch pedal.

(19) shows a second auxiliary circuit with one end connected to the main circuit (16) and the other end connected to the second relay (R2),
A power take-off device (1
) are in contact, that is, when the slider (8) engages the spline (7) and the small-diameter intermediate gear (6),
A third switch (
LS2) is interposed.

(20) shows an operating circuit that connects one end to the main circuit (16) and the other end to the solenoid (SQL),
This operating circuit (20) is a circuit (21
), a fifth switch (r2) that operates in response to the second relay (R2) and is disconnected when the second relay (R2) operates, and a resistor (22) are connected in parallel. It is composed of a parallel circuit (23) provided.

Figure 3 is a diagram of the operating force F on the actuator (12) and the stroke H between the suction body (13) at the base of the actuator (12) and the solenoid (SQL) when the voltage is 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.
It can be understood that if is small, the operating force F will be large even if the voltage is low.

In the present invention, with the above configuration, the operation switch (S) is now connected, and then the clutch pedal is operated to switch the first switch (LS).
When I) is connected, the current from battery (B) is the first
The first relay (R1) is energized through the auxiliary circuit (17). At this time, the operation of the first relay (R1) causes the second switch (
rl) and the fourth switch for the first relay (rf>) are both connected.

After that, even if the first switch (LSI) is turned off by removing the operation of the Clasochi petal, the second switch (rl) for the first relay of the holding circuit (18) is connected, so the first relay (R1) energization is maintained.

As mentioned above, when the fourth switch (rl) for the first relay of the operating circuit (20) is connected, the fifth switch (r2) for the second relay is connected, so that the power from the battery (B) is reduced. The current flows through the fourth switch (rf) and the fifth switch (r2
), the solenoid (SQL) is energized, and at this time, the entire 24V voltage is consumed by the solenoid (SQL).

As a result, as shown in Fig. 3, when the stroke H of the actuator (2) is, for example, 7 mm, the operating force F corresponding to 24 V is approximately 15 kg, and with this large force, it is integrated with the shift rod (10). 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 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.

As mentioned above, when the shifter (9) moves to the two-dot chain line and the stroke of the actuator (12) becomes O, the actuator (12)
As a result, the third switch (LS2) is switched to a closed state, so that the second relay (R2) is operated, and the fifth switch (r2) corresponding to this second relay (R2) is switched from a closed state to a closed state.

At this time, the current to the solenoid (SQL) flows through the fourth switch (RF) and the resistor (22), so the 24V voltage of the battery (B) is reduced to 15V by the resistor (22). The remaining 8.3cm will be consumed by the solenoid (SQL).

The position where the stroke H becomes O, 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 (SQL) is energized for a long time, the solenoid (SOL) will not close. There is no heat generation and no decrease in operating force F.

To turn off the power take-off device (1), turn off the operation switch (S) to turn off the solenoid (sol).

) is no longer energized, and at this time the shifter (9) is retracted by the force of the spring (14), thereby disconnecting the power take-off device (1).

In addition, in the above embodiment, the second
A fifth switch (r2) for the relay is installed in parallel, but the third switch (LS2), such as a limit switch switched by the actuator (12), is used as the fifth switch (r2) for the second relay. In this case, the third switch (LS2) is switched between contact and disconnection when the actuator (12) is contacted.

As described above, even if a small solenoid is used, the present invention applies a high voltage to the solenoid in the initial stage of actuating the actuator to increase the operating force F, and when the power take-off device is in contact, the stroke H becomes approximately O. When this happens, a portion of the battery voltage is consumed in advance by a resistor, and the remaining voltage is given to the solenoid, so there is no heat generation when the solenoid is energized for a long time, and this reduces the operating force F. The power take-off device can be reliably held in a connected state without causing any damage.

[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, (20) is the operating circuit, (21) is the circuit, (22) is the resistor, (23) is the
) is a parallel circuit, (S) is an operation switch (rl) is a switch, (r2) is a switch, and (5QL) is a solenoid. Applicant Kyokuto Kaihatsu Kogyo Co., Ltd. Figure 1

Claims (1)

[Claims] In a device that operates an actuator by energizing a solenoid, thereby directly operating a shifter to control connection and disconnection of a power take-off device, an operation switch and a clasotis isode that are linked to the operation of the thalassotip petal are respectively connected. A parallel circuit in which a relay switch is installed that operates when the power take-off device is operated to connect, and a resistor and a switch are installed in parallel. The circuit constitutes an operating circuit, and this operating circuit energizes the solenoid 141.
11. A control device for a power take-off device in an automobile.