JPH01111527A - Drive device for vehicle - Google Patents

Abstract

PURPOSE:To reduce loads applied to related members by connecting a pair of left and right transmitting members to a pair of left and right output shafts in a differential gear respectively and a pair of left and right wheels through a pair of left and right shafts to the transmitting members respectively. CONSTITUTION:A drive force from a transmission is transmitted to a differential gear 1, while a pair of left and right output shafts 5, 6 are extended from the differential gear 1 to both sides of a car respectively. Thus, a pair of left and right transmitting members 7, 8 are connected to the output shafts 5, 6 respectively. A pair of left and right wheels 13, 15 are respectively connected to the transmitting members 7, 8 through a pair of left and right drive shafts 14, 16. Thus, the respective drive shafts 14, 16 are elongated, and the respective displacement of shaft angle of drive shafts 14, 16 in the vertical movements of respective wheels 13, 15 is lessened. Thus, loads applied to members such as synchromesh joint 17 or the like attached to respective drive shafts 14, 16 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drive system for a vehicle equipped with a differential gear.

(Prior Art) Conventionally, a vehicle has been equipped with a differential device having an input section that receives driving force from a transmission and a pair of output shafts, and left and right wheels are connected to each output shaft via a drive shaft. The drive device is generally known, and for example, in FFII, as shown in Japanese Patent Application Laid-Open No. 58-94657, the input part of the differential device is connected to the output part of the transmission,
Output shafts that transmit driving force to the left and right wheels are provided on both sides of the differential.

By the way, generally in this type of drive system, output shafts are provided on both sides of the differential device in the vehicle width direction, and
A left wheel is connected to the left output shaft, and a middle wheel is connected to the right output shaft via drive shafts. In addition, a constant velocity joint is provided between each drive shaft and each output shaft of the differential and the wheels, and this constant velocity joint allows the shaft angular displacement of the drive shaft in accordance with the vertical movement of the middle wheel. It has become so.

However, in the conventional device as described above, the drive shaft between each output shaft of the differential device and the wheels is relatively short, so
When the vertical movement of the wheels in response to unevenness of the road surface increases, the amount of shaft angular displacement of the drive shaft increases accordingly. If the above-mentioned differential gear is located off to one side of the axle center due to layout or other reasons,
In particular, the drive shaft between the actuating device and the wheel on the C side becomes short, and its shaft angular displacement tends to increase. And when the axial angular displacement of the drive shaft increases like this,
There have been problems such as an increase in the load applied to the constant velocity joint, which is disadvantageous to the durability of the constant velocity joint.

(Object of the Invention) In view of the above-mentioned circumstances, the present invention has been developed by lengthening the drive shaft between each output shaft of the differential gear and the left and right wheels.
A vehicle drive II having a structure that can reduce the amount of axial angular displacement of the drive shaft when the wheels move up and down, and is advantageous for the durability of members provided between the drive shaft, the differential gear, and the wheels. This is what we provide.

(Structure of the Invention) The present invention provides a drive system for a vehicle that is provided with a differential device to which driving force from a transmission is transmitted, and in which a pair of output shafts of the differential device are arranged so as to extend on both sides in the vehicle width direction. In the device, a left side power transmission member and a right side power transmission member are respectively connected to the left and right output shafts of the differential, a right wheel is connected to the left side power transmission member via a first drive shaft, and a right wheel is connected to the right side power transmission member. The left wheel is connected via a second drive shaft.

With this configuration, the wheels on the far side from each output of the differential are connected via the drive shaft to the power transmission member connected to each output of the differential, thereby increasing the length of the drive shaft. Become.

(Example) Fig. 1 is a view of a drive device according to an embodiment of the present invention seen from the rear, Fig. 2 is a view of the same device seen from above, and Fig. 3 is a skeleton diagram of the same device. In the figure, 1 is a differential device. The driving force from the transmission is transmitted to this differential device, and for example, in a FF (front engine front drive) vehicle, the output gear 3 of the transmission 2 and the differential device @
The differential device 1 is engaged with the input gear 4 of the differential gear 1.
The driving force is input to (see Fig. 3). This differential device 1 includes a pair of output shafts 5 and 6 that protrude to both sides in the vehicle width direction.The left output shaft 5 is connected to a left power transmission member 7, and the right output shaft 6 is connected to a right power transmission member. 8 are connected.

Each of the power transmission members 7.8 is connected to a gear 9.10 attached to each output shaft of the differential @1 and a gear 1 meshing with the gear 9.10.
1.12. And the left power transmission member 7
, a right wheel 13 is connected to the shaft 11a of the gear 11 via a first drive shaft 14, and a left heavy wheel 15 is connected to the shaft 12a of the gear 12 of the right independent transmission member 8 via a second drive shaft 16. are connected via. In other words,
Both drive shafts 14 and 16 are open power transmission members 7°8
The left power transmission member 7 and the right wheel 1
3, and the right power transmission member 8 and the left wheel 15 are connected, respectively.

Each of the above power transmission members 7.8 and the drive shaft 14.1
Constant velocity joints 17 are provided between each drive shaft 14.16 and each wheel 13.15, and between each drive shaft 14.16 and each wheel 13.15, for transmitting rotation while allowing axial angular displacement of each drive shaft.

In the vehicle drive device as described above, the differential device a1
The connection direction is changed between each output shaft 5.6 and each wheel 13.15 by each power transmission member 7.8, so that each drive shaft 14.16 Since it is provided so as to be connected to the power transmission member 7.8, compared to the conventional structure in which the left output shaft of the differential gear and the left wheel, and the right output shaft and the right wheel of the differential are connected by drive shafts, the drive shaft As a result, the amount of shaft angular displacement of the drive shaft 14, 16 when the vehicle moves up and down is smaller than that of the conventional shaft angular displacement, and the load applied to the sliding parts of the constant velocity joint 17 due to shaft angular displacement is reduced. This will be reduced.

Also, the difference! When the lJ device 1 is disposed off to one side of the vehicle width center, for example, even when it is disposed off to the left as shown in the figure, the differential device 1 and the right power transmission member 8 are adjusted accordingly. By increasing the distance of
Both drive shafts 14 and 16 can be made equally long.

(Effects of the Invention) As described above, the present invention connects the right wheel to the left power transmission member connected to the left output shaft of the differential device via the first drive shaft, and connects the right wheel to the right output shaft of the differential device. By connecting the left wheel to the right power transmission member via the second drive shaft, each drive shaft is lengthened, so the amount of shaft angular displacement of each drive shaft when the wheels move up and down can be reduced. Can be done. Therefore, the load on members such as constant velocity joints installed on the drive shaft is reduced, resulting in effects such as increased durability.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a vehicle drive unit according to an embodiment of the present invention, seen from the rear, Fig. 2 is a schematic diagram of the same device, seen from above, and Fig. 3 is a driving force transmission path of the device. FIG. 1...Differential device, 2...Transmission, 5.6...';
j, left and right output shafts of the moving device, 7... left side power transmission member,
8... Right side power transmission member, 13... Right wheel, 14...
...First drive shaft, 15...Left wheel, 16.
...Second drive shaft.

Claims (1)

[Claims] 1. Equipped with a differential device to which driving force from the transmission is transmitted,
In a vehicle drive device in which a pair of output shafts of the differential device are arranged so as to extend on both sides in the vehicle width direction, a left power transmission member and a right power transmission member are connected to the left and right output shafts of the differential device, respectively. A drive system for a vehicle, further comprising: a right wheel connected to the left power transmission member via a first drive shaft; and a left wheel connected to the right power transmission member via a second drive shaft.