KR960001873B1 - Vice transmission controller - Google Patents

Abstract

The device for effectively controlling the subsidiary transmission to convert the 2-or 4-wheel drive type to 4-or 2-wheel drive type easily in 4-wheel drive vehicle, has a subsidiary transmission(4) connected with the main transmission(3) with the clutch(2). The device comprises the position switch(5) for detecting the state of power-converting or speed-changing; speed sensor(6) for detecting the vehicle speed; a pair of actuators(71)(72) having the actuating bars(71a)(72a) for converting power or changing speeds; converting and speed-changing solenoids(S1)(S2) for controlling the operation of the actuators; selection switch(11) for selecting the driving; display lamp(9) for displaying the selected driving; engine control unit(10) for controlling the respective parts.

Description

Sub-transmission control device of four-wheel drive vehicle

1 is a schematic diagram of a drive control device in which the present invention is employed.

2 is a circuit diagram of the present invention.

3 is a perspective view of main parts of one embodiment of the present invention;

4 is a perspective view of main parts of another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: engine 2: clutch

3: peripheral gear 4: sub-transmission

5, 5a, 5b: position switch 6: speed sensor

9: Indicator lamp 10: Engine control unit

11: selector switch 13: front axle

14: connecting gear 15: rear axle

16: drive gear 17: engine drive shaft

18: reduction gear 31: switching rod

32: changeover fork 33: shifting road

34, 34 ': shifting block 35: shifting fork

36: switching block 71: switching actuator

71 ': shift actuator 72: shift actuator

72 ': selection actuator 73: switching arm

73 ': shift arm 74: shift arm

74 ': selection arm 75: change arm

S ₁ : switching solenoid S ₂ : variable speed solenoid

The present invention effectively controls the sub-transmission to switch the driving state from two-wheel drive to four-wheel drive, or from four-wheel drive to two-wheel drive in a four-wheel drive vehicle capable of transmitting the driving force of the engine to both the front wheel and the rear wheel. It relates to a sub-transmission control device for a four-wheel drive vehicle for.

In general, the sub-transmitter coupled to the transmission of the four-wheel drive system allows the driving force of the engine, which was transmitted only to two wheels, to be transmitted to the four wheels, or vice versa. It is common for the control device to have a change lever for switching the gear ratio, a switching actuator for switching the driving state, and a selection actuator for selecting the vehicle speed.

That is, in most sub-transmission control devices, the driving state is switched and shifted by the rotation operation of the change lever coupled to the operating rod of each actuator to which the negative pressure of the vacuum pump acts.

However, in the conventional apparatus, since the negative pressure was not efficiently transmitted to the respective actuators, the operation thereof was not smooth, and the structure of the change lever, the switching block, etc., which supports the operation of the actuators is complicated, making manufacturing and maintenance difficult. There was a problem.

The present invention has been made in view of the above conventional deficiency, the object of which is to make the operation smoothly to transfer the negative pressure to each actuator efficiently, as well as the convenience of manufacturing and maintenance through a simpler structure It is to provide an auxiliary transmission control device of a four-wheel drive vehicle that can be provided.

Hereinafter will be described in more detail with reference to the embodiments shown in the accompanying drawings, the specific content of the present invention for achieving the above object.

That is, FIG. 1 shows a schematic diagram of a drive control device in which the present invention is employed, and the sub transmission 4 has one side of the peripheral gear 3 through which the driving force of the engine 1 is transmitted through the clutch 2. Is connected to. The sub-transmission 4 is provided with a position switch 5 for detecting a current switching state and a speed sensor 6 for detecting a vehicle speed.

On the other hand, one side of the sub-transmission 4 is provided with a pair of actuators 71, 72 for switching and shifting the driving state, each actuator 71, 72 is a solenoid (S ₁ ), (S The operation is controlled by ₂ ).

Each of the solenoids S ₁ and S ₂ is connected to the engine control unit 10 together with the position switch 5 and the speed sensor 6, and the engine control unit 10 can select a driving state. The selection switch 11 is connected to a display lamp 9 for displaying a selected driving state.

In the present invention, when the selection switch 11 is pressed, the solenoids S ₁ and S ₂ are selectively opened and closed through the engine control unit 10 so that the actuators 71 and 72 operate. According to the driving state switching and shift is made.

Figure 2 shows a circuit diagram of the present invention, the switching solenoid (S ₁ ) and the shift solenoid (S ₂ ) is turned on and off by the selector switch 11, one side of the check valve (C) and the vacuum tank ( It is connected to a vacuum pump (not shown) having a T), the other side is connected to the switching actuator 71 and the transmission actuator 72.

Continuously with a switching arm 73 at the tip of the operating rods 71a and 72a of the actuators 71 and 72, which move in accordance with the pneumatic pressure acting inside the respective actuators 71 and 72, respectively. One side of the arm 74 is rotatably coupled, the other end of each of the arms (73), (74), the switching fork 32 and the shifting fork 35 is freely coupled to the left and right, respectively.

In the above, the switching fork 32 is located at the center of the outer circumference of the rear axle 15 in which the connecting gear 14 connected to the front axle 13 through the chain 12 is installed, and the shifting fork 35 is driven at the outer circumference. The gear 16 is located on the outer circumferential side of the rear axle 15 in which the engine drive shaft 17 and the reduction gear 18 are mounted.

One side of the engine driving shaft 17 and the rear axle 15 is provided with a connecting gear 19 meshed with the driving gear 16 and the reduction gear 18.

2 shows a state in which the control device is the two-wheel high speed 2H. In this two-wheel high speed state set through the selector switch 11, both the switching solenoid S ₁ and the shift solenoid S ₂ are turned off. The negative pressure of the vacuum pump is applied to the second valve chamber (VS ₂ ), (VS ₄ ) of each solenoid (S ₁ ), (S ₂ ) through the check valve (C) and the vacuum tank (T), so that the switching actuator (71) The operating rod 71a of) is pulled inward, and the operating rod 72a of the transmission actuator 72 protrudes outward.

Therefore, in this state, each of the arms 73, 74 is turned toward the engine drive shaft 17, and accordingly, the switching fork 32 is separated from the connecting gear 14 of the rear axle 15 so that the rear axle 15 ), And the transmission fork 35 is connected only to the drive gear 16 of the engine drive shaft 17 so that the reduction gear 18 of the rear axle 15 idles. A state of high speed driving is obtained.

On the other hand, when the driving state is switched to the four wheel high speed (4H) through the selector switch 11, the shift solenoid (S ₂ ) is kept in the off state, the switching solenoid (S ₁ ) is on, the negative pressure of the vacuum pump The first valve chamber VS ₁ of the switching solenoid S ₁ and the second valve chamber VS ₄ of the shifting solenoid S ₂ are caught to actuate the operating rods 71a of the actuators 71 and 72. , 72b protrudes outward.

Therefore, the shift arm 74 is flipped toward the engine drive shaft 71 and the transfer arm 73 is flipped to the opposite side thereof, and the changeover fork 32 is coupled to the connecting gear 14 of the rear axle 15 to the engine drive shaft. The rotational driving force transmitted from 17 is transmitted to the front axle 13 as well as the rear axle 15.

Finally, when the driving state is changed to four-wheel low speed (4L) by the selector switch 11, each solenoid (S ₁ ), (S ₂ ) is turned on, and the negative pressure of the vacuum pump is set to each solenoid (S ₁ ), ( S ₂ ) is caught in the first valve chamber (VS ₁ ), (VS ₃ ), the operating rod 71a of the switching actuator 71 protrudes outward, and the operating rod 72a of the transmission actuator 72 is inward. Will be pulled out.

Therefore, each arm (73) (74) is flipped in the opposite direction of the engine drive shaft 17, the rotational force is transmitted to the tank shaft (13) via the switching fork (32) and the shifting fork (35) is a reduction gear It is coupled to (18) is a low speed state in which the rotational force of the engine drive shaft 17 is transmitted to the rear axle (15) through the connecting gear 19 and the reduction gear (18).

On the other hand, in the present invention, it is controlled by the traveling speed of the vehicle detected by the vehicle speed sensor 6 of the switching of the driving state as described above.

That is, when the vehicle speed is above a certain speed, switching to the four-wheel high speed 4H or the four-wheel low speed 4L is not performed in the state of the two-wheel high speed 2H, and the vehicle is traveling in the state of the four-wheel high speed 4H. Even if the vehicle speed does not decrease below a certain speed even in the state is not changed to the four-wheel low speed (4L), such control is performed in the engine control unit (10).

For reference, the preferred vehicle speed at the time of switching the driving state is 60 km / h or less in the case of switching from the two-wheel speed to the four wheel speed, and 5 Km / h or less in the case of the switching from the four-wheel speed to the four-wheel speed.

3 is a perspective view of main parts of one embodiment of the present invention.

In this embodiment, the operating rod 71a of the switching actuator 71 is operated in the vertical direction, and the operating rod 72a of the shift actuator 72 is operated in the front and rear directions.

One end of each of the switching arm 73 and the shifting arm 74 is rotatably coupled around the rotation support pins 73a and 74a at a lower portion of one side of each of the operating rods 71a and 72a. The other ends of the 73 and 74 are coupled to the switching rod 31 and the shifting rod 33.

A switching switch 32 is provided on one outer circumference of the switching rod 31 which is reciprocated to the left and right by the switching actuator 71 and the switching arm 73, and a position switch for detecting the switching position on the other outer circumference. 5a is provided.

Similarly, a shifting block 34 supporting the shifting arm 74 is installed at an outer side of the shifting rod 33 which is reciprocated left and right through the shifting actuator 72 and the shifting arm 74, and the shifting fork is provided on the other side of the outer periphery. 35 and a position switch 5b for detecting the shift position are provided.

4 shows another embodiment of the present invention, in which the switching rod 31 and the shifting rod 33 have their respective actuators 71, 72 and arms 73, 74. Unlike the previous embodiment, which transfers to), the rods 31 and 32 to be transferred through the selection actuator 72 'are selected and then the rods 31 and 33 selected by the shift actuator 71' are transferred. It was made to be possible.

That is, in this other embodiment, the operating rod 71a 'of the shift actuator 71' for transferring the rods 31 and 33 is operated in the up and down direction, and the selection for selecting the rods 31 and 33 is made. The actuator 72 'is operated in the front-rear direction.

One side of the shift arm 73 'is coupled to a lower end of the operating rod 71a' of the shift actuator 71 ', and a spline shaft 76 is coupled to the other side of the shift arm 73'. On the outer circumference of 76, the change arm 75 is freely transported in the front-rear direction.

On the other hand, the lower end of the operating rod 72a 'of the selection actuator 72' is coupled to one side of the selection arm 74 'freely supported by the rotation support pin 74a', and the selection arm 74 ' The other side is coupled to the outer peripheral bottom of the change arm (75).

Therefore, when the operating rod 72a 'of the selection actuator 72' is moved in the front-back direction, the selection arm 74 'is rotated, and the change arm 75 is thus moved in the front-back direction.

Meanwhile, a switching block 36 having a coupling groove 36a is installed at the center of the outer circumference of the switching rod 31 in which the switching fork 32 is installed at one side of the outer circumference and the position switch 5a is installed at the other side of the outer circumference. On the other outer circumferential side of the shifting rod 33 on which the shifting fork 35 and the position switch 5b are installed, a shifting block 34a 'having a coupling groove 34a' is installed and the switching block 36 facing each other. The lower end of the change arm 750 is selectively coupled to the shifting block 34 '.

In this alternative embodiment, when the rods 31 and 33 are to be transferred and the driving state is switched, first, the rods 31 and 33 to be transferred through the selection actuator 72 'are selected to change the arm. 75) is coupled to either the switching block 36 or the shifting block 34 'and then rotates the change arm 75 through the shift actuator 71' and the shift arm 73 '. Only 33 can be transported.

In this other embodiment, the selection actuator 72 'for selecting the engagement object of the change arm 75 has a short transfer distance of its operating rod 72a', so that it is not necessary to increase its capacity. 71 and 72 and the shift actuator 71 'can be made smaller.

In the present invention as described above, the driving state through the respective actuators 71, 72 controlled through the respective solenoids (S ₁ ), (S ₂ ) to be turned on and off through the selector switch 11 without a fear of malfunction It is possible to smoothly change and shift of the bar, according to the present invention can easily switch the driving state simply by operating the selector switch 11 in the driver's seat can provide convenience for use only In addition, the structure of each component is simple, so that many advantages can be provided in manufacturing and management.

Claims (3)

In the sub-transmission 4 which is connected to one side of the peripheral transmission 3 to which the driving force of the engine 1 is transmitted through the clutch 2, the position switch 5 for detecting the current switching state and the shifting state. ), A speed sensor 6 for detecting a vehicle speed, operating rods 71a, 72a, and a pair of actuators 71, 72 for switching and shifting the driving state, and each actuator 71 Switching solenoid (S ₁ ) and shifting solenoid (S ₂ ) for controlling the operation of (), (72), selection switch (11) for selecting the driving state, and display lamp for displaying the selected driving state. (9) and an engine control unit (10) for controlling each switch (5), (6), (11) and display lamp (9), solenoid (S ₁ ), (S ₂ ). Derailleur control device of a four-wheel drive vehicle. According to claim 1, one side of the switching solenoid (S ₁ ) and the shifting solenoid (S ₂ ) is connected to the vacuum pump and the other side is connected to each actuator (71), the operating rod of each actuator (71), 72 (70a) and (72a) a switching fork for allowing the rotational arm of the switching arm 73 and the shifting arm 74 to be freely coupled to the tip while selectively transmitting the rotational force of the engine drive shaft 17 to the tank axle 13. (4) characterized in that for coupling the shifting arm (73) and the shifting arm (74), the shifting fork (35) for varying the number of revolutions of the rear axle (15) via the gear (32) and the reduction gear (18). Sub-transmission control device for wheel drive vehicle. The shift arm 73 'is coupled to the operating rod 71a' of the actuator 71 ', and the change arm 75' is freely conveyed in the front-rear direction to the shift arm 73 '. While the installed spool line shaft 76 is coupled, the selection arm 74 'is coupled to the lower end of the operating rod 72a' of the other actuator 72 ', and the change arm 75 is attached to the selection arm 74'. ), The switching fork 32 is installed on one side of the outer periphery and the switching block 36 having a coupling groove 36a is installed in the switching rod 31 on which the position switch 5a is installed on the other side of the outer periphery. A shift block 34 'having a coupling groove 34a' is installed on a shift rod 33 on which a shift fork 35 and a position switch 5b are installed at one side thereof, and a switching block 36 facing each other. And the change arm 75 are selectively coupled to the shifting block 34 'to select the driving state and the shifting state through one actuator 72' and then the driving phase through the other actuator 71 '. And a four-wheel car of the sub transmission control unit, characterized in that one be able to switch the shifting state.