KR0142544B1 - Differential device of a car - Google Patents

Abstract

For the purpose of reducing the minimum rotation radius by suppressing rotation of the side gears of the differential which drives the rotating inner wheel when turning at a low speed;

In a differential of an automobile, an actuator is disposed on an inner surface of a shaft support portion of a drive shaft located outside of a side gear forming the differential so as to face an outer portion of the side gear, and the actuator is disposed on an outer surface of the side gear. It forms a fixing groove which can be inserted into the operation pin protruding from the actuator, the actuator provides a minimum rotation radius reduction device of the vehicle made in connection with the electronic control unit for controlling it by the steering angle sensor and the vehicle speed sensor.

Description

Minimum turning radius reduction device for cars

1 is a block diagram of an apparatus of the present invention.

2 is an exploded perspective view of main parts of the present invention.

3 is an enlarged cross-sectional view of a locking portion applied to the present invention.

[Field of Invention]

The present invention relates to a device for reducing a minimum turning radius of a vehicle, and more particularly, to minimize a side radius of a vehicle driving a rotating inner wheel during rotation at a low speed, thereby reducing a minimum turning radius. It is about the rotation radius reduction device.

[Private Technology]

In general, in a four-wheel drive vehicle, the driving force is also transmitted to the front wheel, which is a steering wheel. In the case of such a front wheel drive wheel, the steering angle is not given much larger than the rear wheel drive vehicle in consideration of a mechanical power transmission process.

As the steering angle is small, the minimum turning radius increases, so when U-turns are made on a wide road, there are no problems. However, on a narrow road, for example, a U-turn is not made at once on four or fewer lanes. Must be calibrated to make a U-turn.

As described above, if the U-turn is not made at once, the U-turn can be easily corrected on the road with low traffic, but there is a lot of difficulty for the U-turn on the complicated road with high traffic, especially for beginners. There is a problem that can cause an accident.

[Summary of invention]

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to suppress the rotation of the side gear of the differential to drive the inner wheel during rotation at low speed to minimize the minimum radius of rotation By reducing the number, it is intended to provide a minimum turning radius reduction device of a vehicle that can provide convenience when parking in a U-turn and a narrow space.

In order to achieve this, the present invention provides an actuator in which the actuator is disposed on an inner surface of a shaft support portion of a drive shaft which is located outside the side gear forming the differential and faces the outer side of the side gear. The outer surface of the gear is formed with a fixed groove that can be inserted into the operation pin protruding from the actuator, the actuator is connected to the electronic control unit for controlling it by the steering angle sensor and the vehicle speed sensor, the minimum rotation radius reduction device of the vehicle To provide.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

EXAMPLE

FIG. 1 shows that the apparatus of the present invention is mounted on a differential of a motor vehicle, and the numeral 1 denotes a differential.

The differential (1) has a case (7) rotated by the rotational force of the drive pinion (5) of the drive line is provided with a ring gear (3) to the outside and meshed with the ring gear (3) thereof; A pair of pinions (11) (13) rotatably coupled to the front and rear sides of the case (7) by a pinion shaft (9); It includes side gears (19) (21) for driving the drive shafts (15) and (17) that are engaged to and splined to both sides of the pinions (11) (13).

Accordingly, when the drive pinion 5 rotates, the pinion 11 and 13 are rotated by the ring gear 3 to rotate the side gears 19 and 21 engaged to both sides, thereby driving the drive shaft 15 connected thereto ( 17), the side gears (19) and (21) move according to the revolution of the pinion (11) (13) at the same rotational speed because the rotational resistance of the drive wheels are the same when the vehicle is going straight. To rotate.

However, if the rotational resistance is largely applied to one of the wheels, the pinions 11 and 13 must roll on the pinion for revolution, so that the rotation of the other side gear starts to rotate as fast as the number of stopped side gears. Function will be achieved.

In this differential, the present invention extends the inner side of the shaft support portions 25 and 27 of the drive shafts 15 and 17 located outwardly of the side gears 19 and 21 so as to extend the second surface on its inner surface. As shown in the figure, actuators 29 and 31 are respectively provided facing the outer side of the side gears 19 and 21, and the actuators 19 and 31 are disposed on the outer side surfaces of the side gears 19 and 21, respectively. The working pins 33 and 35 protruding from the fixing grooves 37 and 39 can be inserted.

The actuators 29 and 31 may be various, but in one embodiment of the present invention, the fixed iron core 43 and the floating iron core 45 are disposed inside the case 41 as shown in FIG. Field coils (47) and (49) are arranged in each of the operation pins (33) and (35) for entering and exiting the through hole (51) of the inner surface of the case (41) inside the flow iron core (45). Formed.

Accordingly, when the actuators 29 and 31 supply electricity to the field coils 47 and 49 in different current directions, the polarities of the iron cores 45 and 47 become opposite to each other and are attracted to each other so that the flow iron core 45 ) Is attached to the fixed iron core 43 so that the actuating pins 33 and 35 do not limit the rotation of the side gears 19 and 21.

However, when electricity is supplied to the field coils 47 and 49 with the same current direction, the polarities of the iron cores 45 and 47 become the same, so that the reaction force is generated so that the flow iron core 45 is pushed out and its working pin. As the 33 and 35 are inserted into the fixing grooves 37 and 39 of the side gears 19 and 21, the rotation of the side gears 19 and 21 is stopped.

And in order to facilitate the operation of the operation pins 33, 35 when inserting the inclined surfaces 53, 55 on both sides of the fixing grooves 37, 39, as shown in FIG. Power supply by the battery 57 is connected to the electronic control unit (23).

In addition, the electronic control unit 23 is electrically connected to the steering angle sensor 59 and the vehicle speed sensor 61, and is operated when steering is performed while the vehicle speed travels below a predetermined speed.

That is, when the apparatus of the present invention is applied as described above, the electronic control unit 23 detects and rotates when the steering angle is greater than or equal to a predetermined angle while the vehicle is traveling at a speed lower than the speed previously inputted to the electronic control unit 243. The rotation of the wheel with respect to the direction is limited. First, when the steering wheel is operated for the right turn in a low speed state, the electronic control unit 23 supplies power to the actuator 31 on the right to have the same polarity.

Then, the rotation of the side gear 21 is suppressed by the operation of the actuator 31, and the other side gear 19 rotates more quickly, thereby reducing the rotation radius of the right turn.

In contrast to the above, when the steering wheel is operated to the left for the left turn, the electronic control unit 23 supplies power to the actuator 29 on the left to have the same polarity.

Then, the rotation of the side gear 19 is suppressed by the operation of the actuator 29, and the side gear 2 on the other side rotates more quickly, thereby reducing the rotation radius of the left turn.

The above operation is operated only when the vehicle speed is lower than or equal to the predetermined speed. If the vehicle speed is higher than or equal to the predetermined speed, the electronic control unit 23 does not perform any operation even when a signal is input from the steering angle sensor 59.

As described above, the present invention is an invention capable of minimizing the radius of rotation by limiting the rotation of the inner wheel turning when steering at low speed by a simple structure.

Claims (3)

In a differential of an automobile, an actuator is disposed on an inner surface of a side support portion of a drive shaft located outside the side gear forming the differential so as to face an outer portion of the side gear, and the actuator is disposed on an outer surface of the side gear. And a fixing groove into which an actuating pin protruding from the insert can be inserted, and the actuator is connected to an electronic control unit controlling the same by a steering angle sensor and a vehicle speed sensor. The actuator of claim 1, wherein the actuator forms a fixed iron core and a floating iron core inside the case, and a field coil on each of the outside thereof, and forms the operation pin for entering the through-hole of the inner surface of the case into the inside of the floating iron core. Minimized turning radius reduction device for the vehicle The apparatus of claim 1, wherein the fixing groove is formed around an inclined surface to smoothly insert its operation when the operation pin is inserted.