JPH0382633A - Transmission for four-wheel drive vehicle - Google Patents

Abstract

PURPOSE:To reduce the number of components by constituting a transfer with the first transfer section connected to a rear differential and the second transfer section connected to the first transfer section via an intermediate shaft, and integrally forming the bearing holding section of the intermediate shaft with a transfer case. CONSTITUTION:A transmission is connected to a midship engine rear drive type horizontal engine 8, and the rear differential 12 of this transmission is connected to a front differential via a transfer 14 and a propeller shaft. The transfer 14 is constituted of the first transfer section 24 connected to the rear differential 12, an intermediate shaft 26 connecting the first transfer section 24 to one end 26a side, and the second transfer section 28 connected to the other end 26b side of the intermediate shaft 26, and the other end 26b side of the intermediate shaft 26 is supported by a bearing 52 held by a holding section 50 integrally formed with a transfer case. The first transfer bevel gear 30 and the final gear 32 of the transfer 14 are coaxially provided on the rear differential 12.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a transmission for a four-wheel drive vehicle, and in particular, a transmission for a four-wheel drive vehicle equipped with a mid-engine or rear-drive transverse engine to drive all four wheels, front and rear. related to transmissions for four-wheel drive vehicles.

[Prior Art] Recently, in order to improve driving performance and stability not only when driving on rough roads or uneven terrain, but also when driving on normal roads, the driving force of the internal combustion engine has been transferred to the front drive axle. Various types of four-wheel drive vehicles have appeared in which power is transmitted to a rear drive axle to drive front wheels and rear wheels. The power transmission system of this four-wheel drive vehicle is front engine/front drive (FF).
There are also rear engine/rear drive (RR), front engine/rear drive (FR), and midship engine/rear drive (MR), which is a variation of rear engine/rear drive (RR).

As the fastest machine for such four-wheel drive vehicles, the
There is one disclosed in Japanese Patent No. 25966. The four-wheel drive vehicle disclosed in this publication has an inter-axle differential device arranged on the longitudinal axis of the vehicle body, an inter-axle differential device provided integrally with the power plant, and an inter-axle differential device on the power plant side. The dimensions of the transmission unit consisting of the device and the gear in the vehicle body width direction are small.

[Problems to be solved by the invention] By the way, in conventional four-wheel drive vehicle transmissions, the gears in the transfer section are arranged to double as the gears in the transmission section during the layout, and the final ratio is There are disadvantages in that it is difficult to change and cannot be adapted to a wide range of specifications.

In addition, when changing the final ratio, it is necessary to change a complete set of gears in the transfer section and differential section, which makes manufacturing difficult and increases costs, which is economically disadvantageous and difficult to change. Therefore, there is a problem that it is disadvantageous in practical terms.

Furthermore, when transmitting the driving force from the horizontally mounted engine to the rear differential via the transmission, transmitting it to the transfer, and transmitting the driving force from the transfer to the front differential, the intermediate shaft of the transfer is connected to the propeller shaft. It is connected to communicate between the transfer and the front differential.

At this time, as shown in FIG. 4, a connection auxiliary member 170 is used at the end 126b of the intermediate shaft 126, and is connected to a propeller shaft (not shown).

For this reason, the number of parts increases, the configuration becomes complicated, and the cost becomes large, which is economically disadvantageous. In addition, the propeller shaft becomes long and the rigidity is reduced.

[Object of the Invention] Therefore, an object of the present invention is to provide a front differential for driving the front wheels and a rear differential for driving the rear wheels connected to a transmission, in order to eliminate the above-mentioned disadvantages. A transfer for transmitting driving force from the rear differential to the front differential is provided, a first transfer part that connects the transfer to the rear differential, an intermediate shaft that connects the first transfer part to one end, and an intermediate shaft. The connection auxiliary member is formed by the second transfer part connected to the end side, and the holding part for holding the bearing on the other end side of the intermediate shaft of the second transfer part is integrally formed with the transfer case of the transfer. To provide a transmission for a four-wheel drive vehicle, which eliminates the need for a four-wheel drive vehicle, reduces the number of parts, allows the final ratio to be easily changed, and improves rigidity.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a transmission for a four-wheel drive vehicle that drives four wheels while changing the speed of a mid-engine, rear-drive transverse engine. A front differential for driving the wheels is provided, a rear differential for driving the rear wheels is connected to the transmission, a transfer is provided for transmitting driving force from the rear differential to the front differential, and the transfer is formed by a first transfer part that communicates with the rear differential, an intermediate shaft that connects the first transfer part to one end, and a second transfer part that connects to the other end of the intermediate shaft. A holding portion for holding a bearing on the other end side of the intermediate shaft is integrally formed with the transfer case of the transfer.

[Function] With the configuration as described above, the transfer has a first transfer portion that communicates with the rear differential, an intermediate shaft that connects the first transfer portion to one end, and a second transfer that connects to the other end of the intermediate shaft. At the same time, the holding part that holds the bearing on the other end side of the intermediate shaft of the second transfer part is integrally formed with the transfer case of the transfer, eliminating the need for connection auxiliary members and reducing the number of parts. In addition, the final ratio can be changed easily and rigidity has been improved.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

1 to 3 show embodiments of this invention. Third
In the figure, 2 is a four-wheel drive vehicle, 4 is a front wheel, and 6 is a rear wheel.

The power transmission system of this four-wheel drive vehicle 2 includes a rear wheel 6 between the front wheels 4, 4 and rear wheels 6, 6, a midship engine on the θ side,
Equipped with a rear drive (MR) type horizontal engine 8,
A transmission 10 is connected to a horizontal engine 8, and a rear differential 12 of the transmission 10 is connected to a front differential 18 via a transfer 14 and a propeller shaft 16.

More specifically, as shown in FIG. 2, the transmission 10 includes an input shaft 20 that inputs the driving force from the horizontal engine 8.
, a counter shaft 22 to which the driving force from the input shaft 20 is transmitted by a gear group (not shown), the rear differential 12, and a transfer 14.

Further, as shown in FIG. 1, this transfer 14 includes a first transfer section 24 that communicates with the rear differential 12, an intermediate shaft 26 that connects the first transfer section 24 to one end 28a side, and this intermediate shaft. 26 and a second transfer section 28 connected to the other end 2eb side.

The rear differential 12 is provided with a first transfer bevel gear 3O of the transfer 14 and a final gear 32 as a final reduction gear on the same axis, and a second transfer bevel gear 34 is meshed with the first transfer bevel gear 30. shall be established.

A transfer drive sprocket 38 is provided on the shaft portion 36 of the second transfer bevel gear 34, and a transfer driven sprocket 40 having the same number of teeth as this transfer drive sprocket 38 is provided, and the transfer driven sprocket 40 and the transfer drive sprocket 38 are connected by a check 742. This will be established by contacting.

A transfer switching dock 44, a transfer switching sleeve 46, and a transfer companion shaft 48 are provided concentrically to the transfer driven sprocket 40.

Further, one end 26a of the intermediate shaft 28 is connected to the transfer companion shaft 48, and the other end 28b of the intermediate shaft 26 is supported via a bearing 52 by a holding part 50, which is a case of the second transfer part 28. , the propeller shaft 1 is attached to the other end 26b of the intermediate shaft 26.
6 is provided with an output flange 54 connected to one end thereof.

Further, a holding portion 50 that holds the bearing 52 on the other end 2eb side of the intermediate shaft 26 of the second transfer portion 28 is integrally formed with the transfer case 56 of the transfer 14.

Reference numeral 58 denotes a bearing 80 that pivotally supports the transfer companion shaft 48 on the one end 2ea side of the intermediate shaft 26.
is an oil seal at one end 26a of the intermediate shaft 26, 62 is a duct seal on the other end 2eb side of the intermediate shaft 26, 64 is a front drive shaft connecting the front differential 18 and the front wheels 4.4, and 66 is the rear side Differential 12 and rear wheel 6.6
This is the rear drive shaft that connects the

Next, the effect will be explained.

The driving force from the horizontal engine 8 is transmitted through the input shaft 201.
The signal is transmitted to the final gear 32 of the rear differential 12 via the countershaft 22, the final gear 32 reduces the speed for the rear wheels, and then the first and second transfer bevel gears 30.34 change the direction. , the front wheel driving force is transmitted to the transfer 14.

The driving force is transmitted from the second transfer bevel gear 34 and the coaxial (7) transfer drive sprocket 38 via the checker 742 to the transfer driven sprocket 40, and the driving force extraction position is below the rear differential 12. will be moved.

The driving force transmitted to the transfer driven sprocket 40 reaches a transfer switching dock 44 having a transfer switching function. This transfer switching dock 44 is coupled to a transfer companion shaft 48 by sliding a transfer switching sleeve 46.

The driving force transmitted from the transfer companion shaft 48 to the one end 28a of the intermediate shaft 26 passes below the gear group (not shown) of the transmission 8, and passes through the front end portion of the transmission 8.
That is, it reaches the second transfer part 28 on the other end 26b side of the intermediate shaft 26, and after reaching the front differential 18 via the output flange 54 and the propeller shaft 16, drives the front wheels 4, 4.

As a result, during the layout, the gears in the transfer section 14 are not arranged to also serve as the gears in the transmission section 8, making it possible to easily change the final ratio, allowing for a wide range of specifications depending on the Balinese Chiron car body. It is something that can be adapted.

Furthermore, when connecting the intermediate shaft 26 and the propeller shaft 16, there is no need for the conventional connection auxiliary member and fixing bolt, so the number of parts can be reduced, the configuration can be simplified, and the manufacturing cost can be reduced. It is economically advantageous because it can be done at low cost.

Furthermore, by integrally forming the holding portion 50 with the transfer case 56 of the transfer 14, the intermediate shaft 2
6 can be firmly supported, the propeller shaft 16 can be shortened, and its rigidity can be improved.

Furthermore, by being able to firmly support the intermediate shaft 28,
The intermediate shaft 26 that passes below the transmission 8 and the rear drive shaft 66 can be made thinner, making the transfer 14 more compact in the vertical direction, increasing the minimum ground clearance, and reducing the weight of the transfer 14. This is practically advantageous.

[Effects of the Invention] As described in detail above, according to the present invention, a front differential for driving the front wheels is provided, a rear differential for driving the rear wheels is connected to the transmission, and the rear differential for driving the rear wheels is provided. A transfer for transmitting driving force from the motor to the front differential is provided, a first transfer part that connects the transfer to the rear differential, an intermediate shaft connecting the first transfer part to one end, and an intermediate shaft to the other end of the intermediate shaft. The holding part that holds the bearing on the other end side of the intermediate shaft of the second transfer part is integrally formed with the transfer case of the transfer, so that the transfer part can be easily removed during layout. Since the gears are not arranged to double as transmission gears, the final ratio can be easily changed, and it can be adapted to a wide range of specifications depending on the Balinese Chiron car body. Furthermore, when connecting the intermediate shaft and the propeller shaft, there is no need for the conventional connection auxiliary members and fixing bolts, which reduces the number of parts, simplifies the configuration, and reduces manufacturing costs. It is economically advantageous.

Furthermore, by forming the holding portion integrally with the transfer case of the transfer, it is possible to firmly support the intermediate shaft, the propeller shaft can be shortened, and the rigidity can be improved.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, and FIG. 1 is a schematic enlarged cross-sectional plan view of a transmission and a transfer of a midship engine, rear drive (MR) type transverse engine,
FIG. 2 is a schematic enlarged sectional front view of the transmission and transfer, and FIG. 3 is a schematic plan view of the transmission of a four-wheel drive vehicle. FIG. 4 is a schematic enlarged view of the end of the intermediate shaft showing the prior art of the present invention. In the figure, 2 is a four-wheel drive vehicle, 4 is a front wheel, 6 is a rear wheel, 8 is a transverse engine, 10 is a transmission, 2 is a rear differential, 14 is a transfer, 16 is a propeller shaft, 1
8 is a front differential, 20 is an input shaft, 22 is a counter shaft, 2
4 is a first transfer part, 26 is an intermediate shaft, 26a is one end, 26b is another end, 28 is a second transfer part, 38 is a transfer drive sprocket, 40 is a transfer driven sprocket, 42 is a check 7, and 44 is a transfer switching dock. , 46 is a transfer switching sleeve, 4
8 is a transfer companion shaft, 50 is a holding part, 52 is a bearing, 54 is an output flange, 56 is a transfer case, 60 is an oil seal, 62 is a duct seal, 64 is a front drive shaft, and 66 is a rear drive shaft. Patent Applicant Suzuki Motor Co., Ltd. Agent Yoshimi Saigo Figure 3 Figure 4! 26b 1. Indication of the case Patent application No. 1-221267 2. Title of the invention: Four-wheel drive vehicle transmission 3. Relationship to the G11t corrective case. Patent applicant address: 300 Takatsuka, Kamimura, Hamana-gun, Shizuoka Prefecture. Address name (2
08) Kiryogi Jidosha Kogyo Co., Ltd.

Claims (1)

[Claims] 1. In a transmission for a four-wheel drive vehicle that drives four wheels while changing the speed of a midship engine or rear-drive transverse engine, a front differential is provided to drive the front wheels, and the transmission is also provided with a front differential to drive the rear wheels. A rear differential is connected to the rear differential, a transfer is provided for transmitting driving force from the rear differential to the front differential, and a first transfer section and a first transfer section are provided for connecting the transfer to the rear differential. A holding part that is formed by an intermediate shaft connected to one end side and a second transfer part connected to the other end side of the intermediate shaft, and that holds a bearing on the other end side of the intermediate shaft of the second transfer part is connected to the transfer part of the transfer part. A four-wheel drive vehicle transmission characterized by being integrally formed in a case.