KR20130084185A - Auxiliary transmission driver of the 4 wheel drive vehicle - Google Patents

Abstract

PURPOSE: A driver for the auxiliary transmission of a four-wheel drive vehicle is provided to prevent power loss with disconnecting power from the output shaft of a transmission at an input shaft in a two-wheel drive mode, thereby improving fuel efficiency in the vehicle. CONSTITUTION: A driver for the auxiliary transmission of a four-wheel drive vehicle includes an input shaft (110), a hub, a hypoid ring gear (130), a hypoid pinion gear (140), a sleeve (150), and a fork unit (160). One end of the input shaft is connected to the differential case of a transmission, and a clutch gear is formed at the outer circumferential surface of the other end of the input shaft. The hub is adjacent to the other end of the input shaft, and inner teeth and outer teeth (122) are respectively formed at the inner and the outer circumferential surface of the hub. A transfer shaft (135) is formed at one side of the hypoid ring gear. The hypoid pinion gear is engaged with the transfer shaft, and transmits a driving force to a propeller shaft. A spline gear is formed at the inner circumferential surface of the sleeve which is movable in the direction of the other end of the input shaft. The fork unit moves the sleeve in a four-wheel drive mode, and simultaneously connects the spline gear, the clutch gear, and the outer teeth.

Description

Auxiliary transmission driver of the 4 wheel drive vehicle

The present invention relates to an auxiliary transmission drive device for a four-wheel drive vehicle.

Generally, four-wheel drive vehicles are classified into full-time four-wheel drive (Full Time 4WD) and selective four-wheel drive (Part Time 4WD). Drive in the two-wheel mode to drive only the four-wheel drive when needed.

Since all four wheels transmit power to all four wheels, they are excellent in driving, climbing, turning, accelerating and turning acceleration capabilities, and are advantageous when driving on steep slopes such as muddy roads, snow roads, and dirt roads or hill roads. There is an advantage.

Hereinafter, an auxiliary transmission driving apparatus of an FF-based four-wheel drive vehicle will be described with reference to the drawings.

As shown in FIG. 1, an FF-based four-wheel drive vehicle changes the rotational force of the engine 1 according to the driving speed of the vehicle by using the engine 1 and a clutch on one side of the engine 1. A transmission 2 for transmitting to the front wheel, a sub-transmission 3 for selectively transmitting a part of the power of the transmission 2 to the rear wheel, and a driving force of the sub-transmission 3 are propeller shafts 4 and And a rear axle 6 which is transmitted through the electronic coupling 5 to drive the rear wheels.

In this case, as shown in FIG. 2, the sub transmission 3 is integrally connected with the input shaft 7 and the input shaft 7 connected to the output shaft of the transmission 2 (hereinafter referred to as the dipper case 11). Hypoid ring gear 8 coupled and interlocked, hypoid pinion gear 9 engaged with the hypoid ring gear 8, and hypoid pinion gear 9 are connected to the propeller shaft 4. It consists of a flange (10) coupled with.

Thereby, the power transmitted to the input shaft 7 coupled to the spline to the dipper case 11 of the transmission 2 is transmitted to the hypoid ring gear 8 coupled integrally, and the hypoid pinion gear meshed with the gear ( 9) is interlocked and transmitted to the rear propeller shaft 4 via the flange 10 (see arrow direction).

According to the conventional sub-drive drive of the FF-based four-wheel drive vehicle as described above, the power of the dipper case is always rotated through the input shaft, the power loss occurs, the power loss occurs, Therefore, there is a problem that the fuel economy of the vehicle falls.

In addition, even if the driving force transmitted to the rear wheels is interrupted by using a known electronic coupling (not shown), the power loss transmitted to the rear wheels still exists.

The present invention has been made to solve the above problems, and an object thereof is to provide a sub-transmission drive device for a four-wheel drive vehicle capable of selectively intermitting a hypoid ring gear and a hypoid pinion gear.

In order to achieve the above object, a sub-transmission drive device for a four-wheel drive vehicle according to an aspect of the present invention is provided.

 An input shaft having one end connected to a dipper case of a transmission and having a clutch gear formed at an outer circumferential surface of the other end;

A hub disposed adjacent to the other end of the input shaft and having inner and outer teeth respectively formed on inner and outer circumferential surfaces thereof;

A hypoid ring gear integrally provided with a transfer shaft engaged with the inner tooth of the hub at one side;

A hypoid pinion gear meshed with the transfer shaft to transmit driving force to the propeller shaft;

A sleeve having a spline gear supported on an outer circumference of the hub on an inner circumferential surface thereof and movable in the other end of the input shaft; And

A fork unit having a fork coupled to an outer circumference of the sleeve and simultaneously connecting the spline gear and the clutch gear / the outer tooth by moving the sleeve during four-wheel drive;

.

The fork unit,

A screw nut installed on one side of the fork to correspond to the movement direction of the sleeve, a guide installed on the other side of the fork to support the fork to be slidably moved, and one end of the screw nut are coupled to the screw nut. It further comprises a drive motor for moving back and forth.

As described above, according to the secondary transmission driving apparatus of the four-wheel drive vehicle according to the present invention, in the two-wheel mode, the power output from the transmission output shaft is disconnected on the input shaft side to prevent the loss of power, thus improving the fuel economy of the vehicle. There are advantages to it.

1 is a view showing a conventional four-wheel drive vehicle,
2 is a cross-sectional view showing a sub-transmission of FIG.
3 is a view showing an auxiliary transmission driving device of a four-wheel drive vehicle according to an embodiment of the present invention;
Figure 4 is an exploded view of Figure 3,
5 is a view showing a four-wheel drive state of the auxiliary transmission drive of the four-wheel drive vehicle according to an embodiment of the present invention, and
6 is a view showing a two-wheel drive state of the sub-transmission drive device of a four-wheel drive vehicle according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings looks at in detail with respect to the auxiliary transmission drive of the four-wheel drive vehicle according to an embodiment of the present invention.

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

As shown in Figure 3 and 4, the auxiliary transmission drive device of the four-wheel drive vehicle according to an embodiment of the present invention, the input shaft 110, the hub 120, It is made via the hypoid ring gear 130, the hypoid pinion gear 140, the sleeve 150 and the fork unit 160.

Here, one end of the input shaft 110 is connected to the dipper case 11 (see FIG. 2 of the related art) of the transmission, and a clutch gear 111 is formed on the outer peripheral surface of the other end.

The hub 120 has a ring shape and is disposed adjacent to the other end of the input shaft 110 so as not to receive a driving force of the input shaft 110 directly, and the inner tooth 121 and the outer tooth (inner and outer circumferential surfaces thereof). 122) are formed respectively.

In addition, the hypoid ring gear 130 is integrally provided with a transfer shaft 135 engaged with the inner tooth 121 of the hub 120 on one side.

In addition, one end of the hypoid pinion gear 140 is engaged with the transfer shaft 135, and a flange (not shown) is coupled to the other end to transmit a driving force to the propeller shaft 4 (refer to FIG. 1 of the related art). It is absent.

On the other hand, the sleeve 150 is provided with a spline gear 151 supported on the outer tooth 122 of the hub 120 on the inner peripheral surface and is installed to be movable in the other end direction of the input shaft 110.

The fork unit 160 is a fork 161 that is fitted to the outer circumference of the sleeve 150, and a screw nut 162 installed to correspond to the movement direction of the sleeve 150 on one side of the fork 161. ), A guide 163 installed through the other side of the fork 161 so that the fork 161 is slidably supported, and one end of the screw nut 162 are coupled to the screw nut 162. It consists of a drive motor 164 to move back and forth.

At this time, the fork 161 is a semi-circular shape surrounding the outer periphery of the sleeve 150, but the shape is not limited thereto, and various shapes can be modified.

Both ends of the guide 163 are fixedly installed in the sub transmission case.

The driving motor 164 may be controlled by the user by manual operation, and may be connected to a separate controller to enable automatic control according to driving conditions.

Hereinafter, with reference to the drawings looks at the operation of the auxiliary transmission drive device of the present invention four-wheel drive vehicle.

When driving force of the rear wheel is required (four-wheel drive) in order to position the vehicle, as shown in FIG. 5, the sleeve 150 is operated according to the operation of the screw nut 162 by the operation of the driving motor 164. Is moved to the left side of the input shaft 110 is connected to the clutch gear 111 and the outer tooth 122 of the hub 120 at the same time, so that the power of the input shaft 110 is the sleeve 150 and the hub 120 And the hypoid ring gear 130 through the transfer shaft 135.

At this time, the rotational force of the hypoid ring gear 130 is transmitted to the hypoid pinion gear 6 by gear meshing, and at the same time, power is transmitted to the propeller shaft to be in the four-wheel mode.

However, when driving at high speeds such as a highway (two-wheel state), as shown in FIG. 6, since the driving force of the rear wheel is not required, the sleeve 150 is moved to the right side of the drawing to be separated from the clutch gear 111 of the input shaft 110. As a result, the power of the input shaft 110 is not transmitted to the hypoid ring gear 130. In this case, power is not transmitted to the propeller shaft due to the independent rotation of the input shaft 110, thereby entering the two-wheel mode.

As described above, according to the auxiliary transmission drive device of the four-wheel drive vehicle of the present invention, in the two-wheel mode, the power output from the transmission output shaft is disconnected on the input shaft side to prevent the loss of power, thus improving the fuel economy of the vehicle. There are advantages to it.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that various changes and modifications may be made without departing from the scope of the present invention.

Claims (2)

An input shaft 110 having one end connected to a dipper case of a transmission and having a clutch gear 111 formed at an outer circumferential surface of the other end;
A hub 120 disposed adjacent to the other end of the input shaft 110 and having inner teeth 121 and outer teeth 122 formed on inner and outer circumferential surfaces thereof, respectively;
A hypoid ring gear 130 in which a transfer shaft 135 engaged with the inner tooth 121 of the hub 120 is integrally installed at one side thereof;
A hypoid pinion gear 140 engaged with the transfer shaft 135 to transmit a driving force to the propeller shaft;
A spline gear 151 supported on an outer tooth 122 of the hub 120 on an inner circumferential surface thereof and movable in the other end direction of the input shaft 110; And
A fork 161 coupled to an outer circumference of the sleeve 150 is provided, and the spline gear 151 and the clutch gear 111 / the outer tooth 122 are simultaneously moved by moving the sleeve 150 during four-wheel drive. Fork unit 160 for connecting;
Sub transmission drive device of a four-wheel drive vehicle comprising a. The method of claim 1, wherein the fork unit 160,
The screw nut 162 is installed on one side of the fork 161 to correspond to the direction of movement of the sleeve 150, and the other side of the fork 161 is supported to allow the fork 161 to slide. A guide transmission (163) and one end of the screw nut (162) is coupled to the secondary transmission drive device for a four-wheel drive vehicle, characterized in that it further comprises a drive motor (164) for moving the screw nut (162) back and forth.

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