JPH04208644A - Power train structure for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power train structure for a vehicle in which an engine is disposed horizontally and a transmission is disposed vertically.

(Prior Art) Conventionally, as a powertrain structure of this type, for example, as disclosed in Japanese Patent Publication No. 61-2523, a cylinder is connected to a vehicle body so that its crankshaft extends in the vehicle width direction. It is known that the transmission is arranged horizontally in the engine, while the transmission is arranged vertically at one end of the crank/naft so as to be perpendicular to the engine.

(Problem to be solved by the invention) However, in the above-mentioned conventional system, the transmission or engine is located away from the longitudinal centerline of the vehicle body on one side in the axial direction, so the mold plate of the entire power train is separated from the left and right sides. There is a problem with it acting unevenly on the wheels.

In addition, the wheel-to-wheel tire that divides the power from the transmission between the left and right wheels is necessarily located close to one of the wheels, just like the transmission, so the length of the suspension arm on that wheel side is There is also the problem of not being able to ensure sufficient safety.

The present invention has been made in view of the above points, and its object is to improve the engine output extraction, etc. when the engine is placed horizontally and the transmission is placed vertically. To provide a power train structure for a vehicle that can be arranged near the front and rear center line of the vehicle body, thereby balancing the left and right power train weight, ensuring a sufficient suspension arm length, and making the power train more compact. That is.

(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention is such that the engine or its crankshaft is placed horizontally with respect to the vehicle body, with the engine or its crankshaft facing in the vehicle width direction, and In the power train structure of a vehicle in which the engine is arranged vertically, the bevel gear mechanism that transmits the engine power from between the cylinders in the crankshaft of the engine to the transmission side is biased. Further, an axle shaft extending in the vehicle width direction is disposed below the shaft member of the bevel gear mechanism extending in the longitudinal direction of the vehicle body and between the engine and the transmission.

(Function) With the above configuration, in the present invention, engine power is transmitted from between the cylinders in the crankshaft to the transmission side by the bevel gear mechanism. It can be placed near the line.

Also, below the shaft member of the bevel gear mechanism that extends in the longitudinal direction of the vehicle body, a so-called dead space is formed between the engine and the transmission, or this dead space is used as a space for arranging the axle. Therefore, the powertrain will be more compact.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 and 2 show the power train structure of a four-wheel drive vehicle according to an embodiment of the present invention, 1 is a vehicle body, 2 is an engine room provided at the front of the vehicle body 1, and the engine compartment is The room 2 is separated from the vehicle compartment 4 by a dasonyu panel 3.

- There is a lanator 5 in front of the engine room 2.
An engine 6 and a transmission 7 are also arranged behind the radiator 5. The engine 6 is a 4-cylinder or 6-cylinder Renpro engine and is placed horizontally with the crankshaft 11 facing in the vehicle width direction, and the transmission 7 is located in front of the engine 6 and perpendicular to the crankshaft 11. It is placed vertically.

13 is the axially central portion of the crankshaft 11 (that is, the portion between the second and third cylinders in the case of a four-cylinder engine, and the portion between the third and fourth cylinders in the case of a six-cylinder engine). The bevel gear mechanism 13 is a bevel gear mechanism that transmits engine power (rotational force of the crankshaft 11) from the crankshaft 11 via a clutch 16 to the transmission, and the bevel gear mechanism 13 is rotatably integrated with the crankshaft 11 via a sleeve 12. A bell gear 13a on the drive side fitted into the bell gear 13a, a bell gear 13b on the driven side meshing with the bell gear 13a, and a bell gear on the driven side], a shaft portion rotatably provided with 3b and extending in the longitudinal direction of the vehicle body. 1'3c, and the shaft member 13
c is rotatably supported by the casing 14 via a hair ring. The clutch 7ch 16 includes a support disk 17 rotatably coupled to the front end of the shaft member 13c of the bevel gear mechanism 13, a clutch disk 18 provided opposite to the support disk 7, and the clutch disk 17. 18 against the support disk] 7. The input shaft 21 of the transmission 7 is rotatably connected to the clutch disc 18, and when the clutch 16 is connected (pressed by the clutch disc 18 or the support disc 17), the engine power is The signal is transmitted to the input shaft 21 of the transmission 7.

The transmission 7 has an input shaft 21 and an output shaft 22 that are parallel to each other and extend in the longitudinal direction of the vehicle body.
．． ') A transmission gear train 23 is disposed between the two. The engine power input to the input shaft 21 is transferred to the output shaft 21 via any one gear of the transmission gear train 23.
2, and the speed is appropriately decelerated during this time.

An output gear 24 is rotatably provided at the rear end of the output shaft 22 of the transmission 7, and the power output from the output gear 24 is transmitted to a planetary gear type center differential 3.
1, it is divided into a front wheel side and a rear wheel side. The center differential gear 31 has the output gear 27 on its outer peripheral edge.
A ring gear 31a serving as a power input part having a gear part that meshes with the sun gear 31b serving as an output part to the rear wheel side.
, a planetary gear 31c that meshes with both gears 31a and 31b, and a carrier 31d that supports the planetary gear 31c and serves as an output section for the front wheels. The power for the front wheels (carrier 31d) is provided by a pair of bevel gears 3.
2.33, the helical gear type front differential 34 as a differential between wheels is divided into left and right parts, and then axrunyafts 35L and 35R are respectively installed.
and through the drive shafts 36L and 36R.

The power is transmitted to the right front wheel 8. The power to the rear wheel side (sun gear 31.b side) is provided by a pair of gears 4
1.42 and a propeller shaft 43, the power is transmitted to the rear wheels at the rear of the vehicle body.

Here, as shown in FIG. 1, the transmission 7 is disposed at a position forward of the engine 6 by a distance necessary to secure a space for disposing the clutch 16 between the transmission 7 and the engine 6. There is. Further, the engine 6 is placed horizontally with its upper part (cylinder head side) tilted forward, so that the upper part of the engine 6 is covered above the transmission 7 while The lower part (on the oil pan 54 side) is located with a fairly wide space 46 between it and the transmission 7. In the space 46, that is, the space between the engine 6 and the transmission 7 below the shaft member 13c of the bevel gear mechanism 13, the front differential 34 and the axle (axle shaft 35L) are provided.
or are placed.

In FIG. 2, 51 and 52 are an intake pipe and an exhaust pipe of the engine, respectively, and 53 is a steering device disposed near the bottom of the dash panel 3. the law of nature&
There is a pinion, and the oil pan 54 of the engine 6 is
Some parts are recessed to avoid interference with the self-contained & Binion 53.

However, in the above embodiment, the engine power is transmitted to the transmission 7 side from the axially central portion of the crankshaft 11 of the engine 6 through the bevel gear mechanism 13, so that the transmission 7 is connected to the F-shin 6. Since it can also be placed near the longitudinal centerline of the vehicle, the weight of the entire powertrain can be balanced from side to side across the longitudinal centerline of the vehicle, and as a result, it can contribute to improved steering performance, etc. . In addition, due to the location of the transmission 7, the front differential 34 provided near its output section can also be moved closer to the longitudinal center line of the vehicle body. The length of each vehicle width direction can be easily increased, contributing to improvement of suspension performance.

Further, the front differential 34 and the axle 35L are arranged in a so-called dead space (space) 46 sandwiched between the engine 6 and the transmission 7 below the shaft member 13c of the bevel gear mechanism 13 that extends in the longitudinal direction of the vehicle body. Therefore, it is possible to make the powertrain more compact by making effective use of dead space. In particular, in the case of the embodiment, by arranging the engine 6 horizontally with its upper part tilted forward toward the transmission 7, a relatively wide space 46 is created between the lower part of the engine 6 and the transmission 7. Therefore, even a front differential/yield 34 having a relatively large volume can be easily placed in this space 46.

It should be noted that the present invention is not limited to the above embodiments, but includes various other modifications.

For example, in the above embodiment, a case where a mechanical transmission is used as the transmission 7 has been described, but it goes without saying that the present invention can be similarly applied to a case where an automatic transmission is used. .

Furthermore, in the above embodiments, the case where the power train consisting of the engine 6, the transmission 7, etc. is arranged at the front of the vehicle body has been explained, but the same applies to the case where this power train is arranged at the rear of the vehicle body. be able to.

(Effects of the Invention) As described above, according to the vehicle powertrain structure of the present invention, the engine power is transmitted from between the cylinders in the crankshaft of the engine to the transmission side by the bevel gear mechanism, thereby changing the speed. Since the engine and the engine can be placed near the longitudinal center line of the vehicle body, it is possible to balance the weight of the power train from side to side and ensure a sufficient length of the suspension arm. In addition, the dead space sandwiched between the engine and transmission below the shaft member of the bevel gear mechanism that extends in the longitudinal direction of the vehicle body is used as an axle placement space, so it is possible to make the powertrain more compact. can.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a skeleton diagram of the power train seen from the side of the vehicle body, and FIG. 2 is a sectional view of the power train seen from above. 1...Vehicle body 6...Engine 7...Transmission 11...Crankshaft 13...Bevel gear mechanism 13c...Shaft member 35L...Axle shaft (axle)

Claims (1)

[Claims] (1) A powertrain structure for a vehicle in which the engine is placed horizontally with its crankshaft facing the vehicle width direction, while the transmission is placed vertically with respect to the vehicle body, It is equipped with a bevel gear mechanism that transmits engine power from between the cylinders of the crankshaft to the transmission side, and is located below the shaft member of the bevel gear mechanism that extends in the longitudinal direction of the vehicle body and between the engine and the transmission. A vehicle powertrain structure characterized by having an axle extending in the width direction of the vehicle.