KR920004250Y1 - Electric change-speed gearing of transfer for 4 wheel drive vehicles - Google Patents

Abstract

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Description

Electric transmission of four-wheel drive car transfer

1 is a structural diagram of a conventional four-wheel drive transfer.

FIG. 2 is a schematic cross-sectional view of FIG. 1 showing a linkage relationship between a driver's seat lever and a transfer, and FIG. 3 is an overall transmission diagram of the present invention. Figure 4a, b, c, d or Figure 4 is an operating state of the four-wheel drive transfer of the present invention.

* Explanation of symbols for main parts of the drawings

1: upper fork 2: lower fork

3: cam 10: camshaft

11: transfer shift switch 12: 4-wheel switch

13: neutral switch 12a, 13a: groove

M: Isometric Rotary Pulse Motor (Servo Motor)

The present invention relates to a transfer transmission device of a four-wheel drive vehicle, the purpose of which is to secure the driver's seat and to facilitate the vehicle layout by eliminating the unnecessary shift lever by changing the mechanical transmission driven transmission to the electric.

Conventional transfer shifting methods include a direct shift type and an indirect shift type, but both types have a structure shifted by a driver's hand movement. The upper and lower forks 1 and 2 are described with reference to the examples of FIGS. 1 and 2. The two-step high speed drive, the four-wheel high speed drive, the four-wheel low speed motion, and the four-speed shifting are performed by the relative operation of the two wheels, and the upper and lower forks 1 and 2 are attached to the cam 3. The operation is performed by the lever 4 connected and the shift lever 5 of the driver's seat connected to the lever 4.

That is, the operation of the transfer transmission device of the lever is essentially a shift operation in accordance with the movement of the shift lever located in the driver's seat.

As shown in FIG. 2, when the driver moves the shift lever 5 of the driver's seat forward and backward, the lever 4 attached to the transfer case 7 by the link mechanism 6 is at a constant angle α as shown in FIG. The rotation positions of the two-wheel high speed drive 2H, the four-wheel high speed drive 4H, the neutral N, and the four-wheel low speed drive 4L are determined while rotating to (changeable).

Here, the correct shift position is determined by the position-oriented steel balls 8, the spring 9, and the inner and outer grooves 3a and 3b of the cam 3, and the lever 4 is in a neutral (N) state. When the cam 3 rotates to the left in the 'α' distance, the cam 3 is shifted to the 4W high speed drive (4H), and if the cam 3 is rotated further to the left, the 2W high speed drive (2H) is used. It becomes the shift position of the condition.

If it rotates by 'α' in the right direction, the gear is shifted to the 4W low speed drive (4L).

Here, 'α', that is, the shift angle is an angle determined according to the shape of the inner groove 3a and the outer groove 3b of the cam 3, so that the shift angle can be changed according to the structure of the vehicle, and the cam 3 At the time of rotation, the gear is shifted while moving the upper and lower forks 1 and 2 together with the respective shift rods 16 by rollers guided on the inner and outer grooves 3a and 3b.

However, the above-described conventional driving method is a mechanical operation by the movement of the driver's shift lever, so there are certain advantages, but there are two problems as follows.

First, the transmission shift lever and two transfer shift levers must be installed in the driver's seat, which makes it very difficult to determine the lay-out of the vehicle. There was an interference problem with the chair (especially in the case of vans).

Second, since the transfer is usually a constant mesh type of shifting, the shifting operation force is large, and the driver feels uncomfortable. In particular, if the lever position is difficult to secure, this phenomenon is further exacerbated, which causes significant obstacles in driving the vehicle.

The present invention has been made in view of the defects of the conventional transfer transmission device as described above in accordance with the accompanying drawings, the electric transmission transmission made of an electric system in detail as follows.

In the configuration of the four-wheel drive transmission device in which the transfer of the transfer is made by the relative operation of the upper fork 1 and the lower fork 2 by the cam 3, the cam shaft 10 built up in the cam (3) ) Equiangular rotation pulse motor (M) is installed on the housing 20 to connect the four-wheel indicator switch 12 and the neutral switch 13 to the forward and reverse rotation with the transfer shifting switch 11. Thereafter, the upper surface of the cam 3 is provided with grooves 12a and 13a for operating the four-wheel display switch 12 and the neutral switch 13 to cause the lamps 14 and 15 to blink.

In the figure, reference numeral 16 is a shift rod, 17 is a battery, X is a terminal of the neutral switch 13, Y is a terminal of the four-wheel display switch 12.

Referring to the shift operation of the present invention configured as described above are as follows.

As shown in FIG. 3, when the shift switch 11 attached to the driver's seat control panel is operated up and down, the equiangular rotation pulse motor M is rotated forward and backward by a pulse signal, thereby shifting the transfer.

That is, when the transfer shift position 11 is pressed once in the neutral state (FIG. 4A state) in the 'up' direction shown in FIG. 3, the divided rotation of the equiangular rotary pulse motor (M: servomotor) is performed. As shown in FIG. 4C, the cam 3 is rotated to the left, and the transfer is shifted to the four-wheel high-speed drive 4H end. In this state, if the switch 11 is pressed once more in the 'up' direction, the two-wheel high-speed drive ( 2H) is shifted.

This will usually be the driving state of the vehicle.

If you want to shift the next '4H' stage, press the shifting switch 11 once in the 'N' direction in the neutral (N) state of the cam (3). It shifts to the (4L) stage.

At this time, the shift operation after the rotation of the cam 3 is the same as Utility Model Registration No. 87-9143.

On the other hand, the driver is able to know each shift position in the blink state of the display lamps 14 and 15 operated by the neutral switch 13 and the four-wheel display switch 12.

That is, when the cam 3 stays in the neutral position as shown in FIG. 4a, the switch terminal X of the neutral switch 13 is inserted into the recess 13a installed in the upper surface of the cam 3, and the neutral switch 13 is opened. The neutral display lamp 15 is turned on to display the neutral state.

In addition, in the '4L' position, the terminal Y of the four-wheel display switch 12 is inserted into the recess 12a as shown in FIG. Switch 13 is to be 'off'.

On the other hand, in the ordinary driving state '2H', each of the lamps 14 and 15 is all 'off' without the terminal X (Y) inserted into the recesses 12a and 13a as in the 4d diagram.

The lighting operation of the display lamp can prevent the driver from confusion about the shift position.

As such, the present invention does not require the transfer shift lever to be installed in the driver's seat as in the prior art, so that the vehicle lay-out is very easy. There is an advantage to this.

In addition, since only one transmission lever is positioned in the driver's seat, the driver's driving activity can be widened, and the practical use value of the built-in securing space can be expanded.

Claims (2)

In the configuration of the four-wheel drive transmission device in which the transfer of the transfer is made by the relative operation of the upper fork 1 and the lower fork 2 by the cam 3, the cam shaft 10 built up in the cam 3 Install an equiangular rotary pulse motor (M) on the front and rotate it forward and reverse with the transfer shifting switch (1) .The 4-wheel indicator switch (12) and the neutral switch (13) have a terminal (X) (Y) and a cam (3). Electric transmission of a four-wheel drive automobile transfer, characterized in that it is installed in the housing (20) to contact. The groove (12a) and (13a) in which the four-wheel display switch 12 and the terminal (X) (Y) of the neutral switch 13 are inserted are formed on the upper surface of the cam (3). Electric transmission of four-wheel drive car transfer.