JPH028822Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Technical field) The present invention relates to a propeller shaft.

(Background technology) A propeller shaft that connects the output shaft of the engine mounted at the front of the vehicle body and the input shaft of the differential mounted on the rear axle is located under the vehicle body, and the front sub Members such as a frame and an exhaust pipe are arranged in the width direction of the vehicle.

Generally, a hollow propeller shaft is used to ensure rigidity, but it is hollow. Because of its large diameter, in order to prevent interference with the above-mentioned members that intersect in the vicinity, the propeller shaft must be placed far enough below the subframe, and the exhaust pipe must be placed far enough below the propeller shaft. I do things.

However, if the height of the propeller shaft is lowered and the exhaust pipe is located below it, the minimum ground clearance will be lowered.

Therefore, it is conceivable to use a solid propeller shaft with a small diameter, but since a solid propeller shaft has lower rigidity per unit weight than a hollow propeller shaft, it is not preferred in practice.

(Purpose of the invention) The object of the invention is to include a propeller shaft arranged in the longitudinal direction of a vehicle, and members such as a subframe and an exhaust pipe arranged in the width direction of the vehicle so as to intersect near the propeller shaft. To provide a propeller shaft for a vehicle that secures a minimum ground clearance, effectively prevents interference between the propeller shaft and the above-mentioned members, and has high rigidity comparable to a hollow shaft.

(Structure of the invention) In order to achieve the above-mentioned object, the present invention is characterized in that a member intersecting with the above-mentioned member of the propeller shaft is formed into a solid part with a small diameter, and other parts are formed into a hollow part.

(Embodiment) A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a side view of the drive system of an automobile to which the present invention is applied, FIG. 2 is a plan view thereof, and FIG. 3 is an exploded perspective view of the propeller shaft.

A vehicle implementing the present invention has a four-cylinder engine 1 mounted horizontally on the front of the vehicle body, and axles 6, 6 of the front wheels 5, 5 are connected to the output shaft for the front wheels provided on a transmission 2 integrated with the four-cylinder engine 1 through a differential. are concatenated.

On the other hand, axles 8, 8 of rear wheels 7, 7 disposed at the rear of the vehicle body are supported within a rigid type hollow axle housing 9, and a differential 10 is provided at the center of the axle housing 9. This axle housing 9 has two upper links 13, 13 and two lower links 14, 14 at both ends.
Furthermore, it is suspended in a live axle manner by a four-link suspension with Panhard rod 17 as its main part.

The rear wheel output shaft 3 provided on the transmission 2 and the input shaft 11 of the differential 10 are interlocked and connected by a three-part propeller shaft 20.

That is, the propeller shaft 20 consists of a first shaft 21, a second shaft 41, and a third shaft 51, counting from the engine output shaft 3 side. A cross joint 25 formed in the real parts 22 and 24 and forming a first joint at the front end of the front solid part 22
The rear solid portion 24 is provided with a slideable joint 31 that serves as a second joint.

The cross joint 25 consists of a flange yoke 28 attached to a yoke 26 provided at the front end of the solid portion 22 via a cross pin 27, and the flange yoke 28 is attached to the flange 4 at the rear end of the engine output shaft 3.
are connected with bolts 29 and nuts 30.

In addition, the slider joint 31 is connected to the solid portion 2.
This is a tripod-type constant-velocity joint in which a tube 35 is attached to a tripod 32 provided at the rear end of the tube 35 via rollers.The solid portion 24 and the tube 35 are sealed with a boot 34, and the shaft of the tube 35 is The cylindrical portion 38 of the flange 37 is spline-fitted to the flange 36 . A ring-shaped mount rubber 71 is installed on the shaft 36 of the tube 35 with a bearing 72 interposed between the tube 35 and the cylindrical portion 38 of the flange 37, and a nut 39 is attached to the rear end of the tube 36.
conclude.

Bolts 44... and nuts 4 are attached to the flange 37, which has the flange 42 at the front end of the small diameter solid second shaft 41 assembled to the rear end side of the first shaft 21.
5. Combine at... Further, the cylindrical portion 48 of the flange 37 is spline-fitted to the rear end of the second shaft 41, and a bearing 76 is interposed between the shaft solid portion and the cylindrical portion 48 of the flange 47 on the rear end of the second shaft 41. A shaped mount rubber 75 is attached, and a nut 49 is fastened to the rear end of the shaft 41.

Further, only the front part of the hollow part 53 from the middle part to the rear end of the third shaft 51 is formed as a solid part 52 with a small diameter, and a third shaft is formed at the front end of the solid part 52 and the rear end of the hollow part 53.
and a fourth joint, which also includes cross joints 55 and 61.

In this way, the flange yoke 58 of the cross joint 55 provided at the front end of the solid portion 52 is attached to the flange 47 assembled to the rear end of the second shaft 41 with the bolt 5.
9... and nuts 60...

On the other hand, a flange yoke 64 of a cross joint 61 provided at the rear end of the hollow portion 53 is coupled to the flange 12 at the front end of the differential input shaft 11 with bolts 65 and nuts 66.

The three-part propeller shaft 20 is
The centers of the second and third joints 31, 55 are placed above the straight line L connecting the fourth joints 25, 61, and the brackets 73, 77 of both mount rubbers 71, 75 are attached to the vehicle body with the bolts 74... ,78...
Combine at.

In the propeller shaft 20 described above, an exhaust pipe 81 is arranged substantially parallel on the left side as shown in FIG.
The portion 82 bent to the right at the rear of the vehicle and arranged in the vehicle width direction is connected to the front solid portion 5 of the third shaft 51.
Place it close to the bottom of 2.

The front solid portion 22 of the first shaft 21 is disposed close to the lower side of the front subframe 85.

The third shaft 51 crosses over the rear portion 82 arranged in the vehicle width direction of the exhaust pipe 81 in this way.
Since the front part of the solid part 52 is formed to have a diameter smaller than that of the hollow part 53, the part 82 can be placed higher due to the smaller diameter, and of course interference between the shaft 51 and the part 82 can be prevented. Therefore, the minimum ground clearance can be ensured.

Incidentally, since the portion 82 disposed in the width direction of the vehicle is disposed below the shaft 51, the influence of heat on the body can be avoided.

In addition, the front subframe 8 arranged in the width direction of the vehicle
5, the front part of the first shaft 21 that crosses under the hollow part 23 is formed into a solid part 22 having a diameter smaller than that of the hollow part 23.
can be placed high, and of course interference between the shaft 21 and the subframe 85 can be prevented. Therefore, the minimum ground clearance can be ensured.

Further, since both shafts 21, 51 are provided with elongated hollow portions 23, 53, they have high rigidity.

By the way, in the embodiment, the present invention was applied to a three-part propeller shaft, but it goes without saying that it can also be applied to a single propeller shaft.

(Effects of the invention) As described above, according to the invention, in a propeller shaft where members such as a subframe and an exhaust pipe arranged in the width direction of the vehicle closely intersect, the portions that intersect with the members are made smaller in diameter. Since it is formed in a solid part and the other part is formed in a hollow part, it is possible to effectively prevent interference between the propeller shaft and the above-mentioned members, ensure minimum ground clearance, and also have excellent rigidity. Full of practicality.

[Brief explanation of the drawing]

FIG. 1 is a side view of a drive system of an automobile to which the present invention is applied, FIG. 2 is a plan view thereof, and FIG. 3 is an exploded perspective view of a propeller shaft. In the drawing, 3 is the engine output shaft, 11 is the differential input shaft, 20 is the propeller shaft, 21, 41, 5.
1 is the first to third shaft, 25, 31, 55,
61 is the first to fourth joints, 22, 52 are solid parts, 23, 53 are hollow parts, 81 is an exhaust pipe, 85
is a subframe.

Claims (1)

[Claims for Utility Model Registration] (1) In a vehicle comprising a propeller shaft disposed in the longitudinal direction of the vehicle and a member disposed in the width direction of the vehicle so as to intersect near the propeller shaft, A propeller shaft characterized in that a portion that intersects with a member is formed as a solid portion with a small diameter, and the other portion is formed as a hollow portion. (2) The propeller shaft according to claim 1, wherein the member is a subframe and is arranged to pass below the subframe. (3) The propeller shaft according to claim 1, wherein the member is an exhaust pipe and is arranged to pass above the exhaust pipe.