JPH0357727A - Driving device for vehicle - Google Patents

Abstract

PURPOSE:To prevent the intrusion of foreign materials into an engine in assembly by horizontally laying an outer pipe which crosses at right angle with a crankshaft, in liquidtight penetration into the lower part of an engine case, and inserting a half shaft unit into the outer pipe, permitting the mounting and demounting onto the case. CONSTITUTION:In the lower part of a crankcase 7 in the lower part of an engine case, an outer pipe 14 is horizontally laid in liquidtight penetration, crossing at right angle with a crankshaft 5. Inside the outer pipe 14, a half shaft unit Us having a half shaft 19 supported in turnable manners is inserted, and installed in demountable manners onto the crankcase 7 by the installation flange 172 of a bearing holder 17 at one edge of an inner pipe 18. Therefore, the outside leak of the lubricating oil in an oil pan 9 from shaft holes 12 and 13 and the intrusion of the oil into the outer pipe 14 are prevented, and the intrusion of foreign materials into the engine 1 in assembly and demounting of the unit Us is prevented.

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Application Field The present invention provides a power plant in which the engine of the power plant is installed vertically in the vehicle body (its crankshaft is parallel to the longitudinal direction of the vehicle), and the power plant is arranged on both the left and right sides of the engine. This relates to a vehicle drive device that drives left and right drive wheels. The above-mentioned device is applicable to both a device placed at the front of the vehicle to drive the left and right front wheels, and a device placed at the rear of the vehicle to drive the left and right rear wheels. ．． (2) Conventional technology Conventionally, a power plant consisting of an engine, a transmission, and a differential gear is installed vertically in a vehicle, and the output of the power plant is transmitted through a half shaft that is supported through the power plant. A device that is interlocked with the drive wheel is known (see Japanese Patent Publication No. 4B-13015).

(3) Problems to be Solved by the Invention However, in the conventional device, the half shaft is
Because it penetrates the engine case and is rotatably supported there, there is a risk of foreign objects entering the engine when the half shaft and differential gear are assembled to or separated from the engine. .

■ When the differential gear and half shaft are separated from the engine, the lubricating oil inside the engine case may leak to the outside.

■ The workability of assembling the differential gear, half shaft, etc. to the engine is poor.

There are issues such as: The present invention has been made in view of these circumstances, and it is an object of the present invention to provide a vehicle drive device that can solve the above problems all at once. B. Structure of the Invention (1) Means for Solving the Problems To achieve the above object, the present invention comprises an engine, a transmission and a differential, and a crankshaft of the engine, a transmission and a differential. In a vehicle drive system, in which drive shafts for driving drive wheels interlocked through a device are disposed orthogonally to each other, an outer pipe liquid-tightly penetrates the lower part of the engine case of the engine, orthogonal to the crankshaft. A half-shaft unit with a half-shaft rotatably supported is inserted into the outer vibe, and the half-shaft unit is removably supported by the engine case. (2) Function According to the above precautions, there is no risk of foreign matter entering the engine when the half shaft is assembled or separated, and there is no risk of corrosion of the half shaft itself, oil seal failure, etc. during engine operation. Foreign matter caused by this will not enter the engine. Furthermore, even if the differential gear and half shaft are separated from the engine, the lubricating oil in the oil van will not leak outside, making their maintenance easier. Furthermore, the half shaft can be protected by an outer panel. (3) Example Next, an example of the present invention will be explained with reference to the drawings. FIG. 1 is a schematic plan view of the present invention, in which a power plant P in which an engine 1, a clutch 2, a missile 3, and a differential gear D are unitized is mounted on a vehicle v (113).
A crankshaft 5 of the engine 1 is mounted parallel to the longitudinal axis of the vehicle V, and the output of the engine 1 is transmitted to the differential device D via the crankshaft 5, clutch 2, transmission 3, and propeller shaft 4. Furthermore, from there Joint Jf-1, JR. -2, left, right drive shaft S1
, Sr and other joints Jr-1 and Jr-2, the signal is transmitted to the left and right front wheels WE, Wr as left and right drive wheels.

In an engine 1 that constitutes a driving part of a power plant P, a crankshaft 5 is rotatably supported in a crankcase 7 that is integrated with a cylinder block 6, and a seal member 8 is provided on an open lower surface 7 of the crankcase 7. The oil pan 9 is connected via the.

On one side of the crankcase 7 and oil pan 9, which constitute the lower part of the engine case of the engine 1, the differential device
will be placed. What about the differential ID? The case 10 is integrally connected to the side walls of the crankcase 7 and the oil van 9 by a plurality of connecting bolts 11.

As shown in Fig. 2.3, opposing left and right shaft holes 12 and 13 are bored in the left and right side walls 919■ of the oil van 9 along the direction of the crankshaft 5, and these shaft holes Hole 1
2 and 13, an oil pan 9 is perpendicular to the crankshaft 5.
Both ends of the outer pipe 14 extending in a substantially horizontal direction are horizontally suspended in a liquid-tight manner via seal members 15 and 16,
The lubricating oil Oi in the oil pan 9 is supplied to the left and right shaft holes 1
2, 13 to the outside, or Aukvipe 14
It is designed so that no one can get inside.

A half shaft unit Us is inserted into the outer pipe 14 from its right open end in FIG. ? As shown in FIG. 3, the half shaft unit Us is composed of an inner pipe 18 integrally formed with a bearing holder 17 at one end, and a half shaft 19 inserted into the inch pipe 18. The outer end of the shaft 19, that is, one end on the bearing holder 17 side, is rotatably supported by the bearing cylinder portion IL of the bearing holder 17 via a ball bearing 20. This ball bearing 20 has a bearing cylinder portion l7.
A stepped portion shaped like 1 and a circlip 34 fitted to it
The bearing holder 17 is secured to the bearing holder 17, and the space between the bearing cylindrical portion 17 and the half shaft 19 is tightly sealed by oil seal holes 21 and 22 that are fitted into the bearing cylindrical portion 17 in close proximity to the ball bearing 20. Ru.

A mounting flange 17■ is integrally formed on the bearing holder 17 of the half shaft unit Us, and as shown in FIG. By fixing the flange l7 to the side wall of the oil pan 9 with a plurality of mounting bolts 23, it is integrally supported by the oil pan 9.

The inner end of the half shaft 19, that is, the end opposite to the bearing holder l7, is rotatably supported by the differential case 10 via the Taber roller bearing 25 and protrudes into the differential case 10, and as described later, the differential Connected to device D. The differential device D has a conventionally known structure, and includes a differential housing 27 rotatably supported by the differential case 10 via tapered roller bearings 25 and 26, and a differential housing 27 fixed to the outer circumference of the differential housing 27. A large-diameter drip gear 28 that is interlocked with the propeller shaft 4 (FIG. 1) from the engine 3, a pair of differential pinion gears 29 and 30 that are supported by the differential housing 27 via a pin shaft 33, and the differential pinion gear 29. 30, one pinion drive gear 31 is spline-coupled to the inner end of the half shaft 19, and the other pinion drive gear 32 is connected to the right side. Splined to joint Jr-1.

At the outer end of the half shaft 19, there is a left joint Jl-
1 is spline-coupled, and this joint JQ-
1, a left drive wheel WZ is connected via a drive shaft Sf and another joint Jf-2, as shown in FIG.

The tapered roller bearing 25 is provided on the outer wall of the differential case 10.
The other Taber roller bearing 26 is provided opposite to. The inner end of the other joint {Jr-1} is rotatably supported by this bearing 26.

The inner end of this joint Jr-1 is thrust into the differential case IO, passes through the differential housing 27 of the differential device D, and is spline-coupled to the binion drive gear 32 thereof.

In addition, the outer end of this jigo point Jr-1 is connected to the right drive shaft Sr and other joints J as shown in FIG.
It is connected to the right drive wheel Wr via r-2.

Next, the operation of this embodiment will be explained.

When the engine l of the power plant P is operated now, its output is transmitted from the clutch 2 and the transmission 3 to the differential device D via the propeller shaft 4, and then from the cough differential device D to the half shaft 19 and the joint Jffi- 1,
Left side drive shaft SL and other joints J1-
2 through the left drive wheel Wi! ．． It is also transmitted to the right drive wheel Wr via the joint Jr-1, the right drive shaft Sr, and another joint Jr-2.

Incidentally, the half shaft 19 is horizontally suspended in a fluid-tight manner across the oil pan 9, inserted into the outer pipe 14, and detachably supported by the oil pan 9. Therefore, when the half shaft unit Us is assembled or removed, the engine There is no risk of foreign matter entering the interior. Furthermore, when the differential gear D and the half shaft unit Us are removed from the engine 1, the lubricating oil Oi in the oil bun 9 does not leak to the outside, and the work of assembling and removing the half shaft l9 to the engine i is possible. Not only is this easier, but it also becomes possible to check for lubricating oil leaks from the engine alone.

Furthermore, the half shaft unit Us has an outer pipe 14.
This ensures smooth and light rotation of the half shaft l9 at all times and increases its durability.

In addition to the oil bun 9, the half shaft unit Us and the outer pipe 14 may be provided over the crankcase 7, which constitutes the lower part of the engine case, or between the crankcase 7 and the oil pan 9.

C. Effects of the Invention As described above, according to the present invention, there is provided a half-shaft unit in which an outer pipe is fluid-tightly passed through and transversely disposed in the lower part of the engine case of an engine, orthogonal to the crankshaft, and the half-shaft is rotatably supported within the outer pipe. Insert the
Since the half-shaft unit is removably supported at the bottom of the engine case, it not only prevents foreign matter from entering the engine when the half-shaft unit is assembled or removed, but also prevents corrosion of the half-shaft during engine operation. Foreign matter caused by a defective oil seal does not enter the engine, making this type of engine more agile.
Smooth operation is guaranteed.

Furthermore, when the differential gear and half shaft unit are separated from the engine, lubricating oil in the oil pan will not leak outside, making maintenance of the power transmission section of the power plant easier.

Furthermore, the half shaft unit is protected by the outer panel, ensuring smooth and light rotation of the half shaft at all times, and increasing its durability.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic plan view of the device of the present invention, FIG. 2 is a vertical sectional side view of the device of the present invention taken along the line ■-n in FIG. is an exploded side view of the half shaft unit and engine. D...differential gear, U s...half shaft unisoto, Sf, Sr...drive shaft ■...engine, 3...missigon, 5...crankshaft, 7...crank Case, 9... Oil van, 14... Outer pipe, 19... Half shaft Fig. 1 ◇

Claims (1)

[Claims] Engine (1), transmission (3) and differential gear (D
) of the engine (1);
), and the transmission (3) and differential gear (D
) in a vehicle drive system in which drive wheels (Wl, Wr) and driving drive shafts (Sl, Sr) are disposed perpendicularly to each other through interlocking drive wheels (Wl, Wr) and driving drive shafts (Sl, Sr). , the outer pipe (14) is perpendicularly perpendicular to the crankshaft (5) and transversely penetrated in a liquid-tight manner, and a half shaft unit (Us) rotatably supporting a half shaft (19) is inserted into the outer pipe (14). , A drive device for a vehicle, characterized in that the half shaft unit (Us) is removably supported by an engine case.