JPH0616822Y2 - Vehicle intermediate shaft support structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a support structure for an intermediate shaft provided in a vehicle such as a front-wheel drive vehicle in order to equalize the left and right wheel drive shafts and eliminate torque steer.

(Prior Art) Generally, in a front-wheel drive vehicle equipped with a transverse engine,
A differential is connected to a transmission that is connected to one end of a crankshaft that extends in the vehicle width direction of the engine, and the differential is located on one side in the vehicle width direction. One front wheel drive shaft is directly connected to one output shaft of the differential gear to eliminate the torque steer by equalizing the length, but the other output shaft of the differential gear has an intermediate shaft extending in the vehicle width direction. The other front wheel drive shaft is connected via the other.

Then, in order to block the transmission of vibration to the vehicle body, such an intermediate shaft is elastically supported to a bracket fixed to the engine through a bearing and an elastic body. It is disclosed in Japanese Patent Application No. 60-211770 proposed by the applicant.

(Problems to be Solved by the Invention) By the way, if a large axial load of the intermediate shaft is input and the elastic body is overdeformed, the durability of the elastic body deteriorates.

Therefore, an object of the present invention is to provide a large axial load on an intermediate shaft provided in a wheel drive device such as a front wheel.
An intermediate shaft support structure for a vehicle that limits axial displacement of the elastic body interposed between the bearing on the intermediate shaft side and the bracket on the engine side to prevent excessive deformation and improve the durability of the elastic body. To provide.

(Means for Solving Problems) In order to solve the above problems and achieve the object, the present invention is equipped with an engine 1, a transmission 2 is connected to the engine 1, and is connected to the transmission 2. The differential device 3 is arranged offset from the vehicle width center, one output shaft 4 of the differential device 3 is connected to one wheel drive shaft 8, and the differential device 3 is
In the vehicle in which the other wheel drive shaft 14 is connected to the other output shaft 5 of the other through the intermediate shaft 21 extending in the vehicle width direction,
The inner race 27 of the bearing 26 is fixed to the outer circumference of the intermediate shaft 21, and the outer race 2 of the bearing 26 is fixed.
8 is housed in the inner cylinder member 31, and the inner cylinder member 31 is attached to the bracket 41 fixed to the engine 1 by an elastic body 40.
And a small diameter portion 32 is formed on the outer circumference of the inner cylindrical member 31 via an outer peripheral side step surface 34, and the bracket 41 has an outer peripheral surface of the small diameter portion 32 of the inner cylindrical member 31. A stopper 43 facing the outer peripheral side step surface 34 is provided to restrict radial displacement and axial displacement of the elastic body 40.

(Operation) The stopper 43 contacts the outer peripheral surface of the small-diameter portion 32 to restrict the radial displacement of the inner cylindrical member 31, and the outer peripheral step surface 34.
To regulate the axial displacement of the inner cylinder member 31. Therefore, when a large load is applied to the intermediate shaft 21 in the radial direction or the axial direction, the radial over-displacement and the axial over-displacement of the elastic body 40 interposed between the inner tubular member 31 and the bracket 41 are prevented. Therefore, the durability of the elastic body 40 is improved.

(Examples) Examples will be described below with reference to the accompanying drawings.

FIG. 1 shows a schematic front view of a wheel drive device, in which a transverse engine 1 is mounted on a front portion of a vehicle body, and a transmission 2 is connected to a crankshaft end portion (not shown) extending in the vehicle width direction of the engine 1. , The transmission 2 has a differential device 3 protruding downward from the engine 1.
Is connected to one output shaft 4 of the differential device 3 through a constant velocity joint 7 and a drive shaft 8 is connected through a constant velocity joint 9 to an axle 12 of one front wheel 11. Be connected. As shown in FIG. 2, an intermediate shaft 21 extending in the vehicle width direction is connected to the other output shaft 5 of the differential device 3 by a plug-in spline connection, and the intermediate shaft 21 has a constant velocity joint 13. The drive shaft 14 is connected to the drive shaft 14 via a constant velocity joint 15 and the axle 17 of the other front wheel 16 is connected to the drive shaft 14.

Further, the intermediate shaft 21 is elastically supported by the engine 1 at the end of the constant velocity joint 13 side.

In FIG. 3, 22 is a spline engraved on the outer periphery of the end portion of the intermediate shaft 21 on the side of the differential device 3, and 23 is a large-diameter portion formed on the outer periphery of the end portion of the intermediate shaft 21 on the side of the constant velocity joint 13. A spline 24 and an annular groove 25 are also engraved in the end portion, and the shaft portion of the constant velocity joint 13 (not shown) is connected to the spline 24 by a retaining ring that is attached to the annular groove 25.

A ball bearing 26 is fixed on the outer circumference of the end of the intermediate shaft 21 on the side of the constant velocity joint 13 between the inner race 27 and the large diameter portion 23 and the snap ring 29. The tubular member 31 is fixed. A small diameter portion 32 is formed at the front end of the inner cylinder member 31 with an inner peripheral side step surface 33 and an outer peripheral side step surface 34 interposed therebetween. The outer race 28 is fixed to the inner circumference of the inner cylinder member 31 and fixed between the inner diameter side step surface 33 with the small diameter portion 32 and the snap ring 35. 36 and 37 are seal rings and 38 is a ring plate. .

As shown in FIG. 4, the inner circumference of such an inner cylindrical member 31 is printed with an inner circumference of an elastic body 40 made of a soft rubber and having an annular shape, and a sleeve 39 is baked on the outer circumference of the elastic body 40. The sleeve 39 is press fitted and fixed to the inner circumference of the outer cylinder member 42 of the bracket 41.

The bracket 41 is integrally formed with the outer tubular member 42 and the front and rear mounting pieces 4 are attached.
4, 45, and the bracket 41 is fixed by screwing the mounting pieces 44, 45 to the lower surface of the engine 1 with bolts 46. Further, an annular stopper 43 extending to the inner peripheral side is integrally provided at the front end of the outer cylindrical member 42, and the stopper 43 is provided on the outer peripheral surface and the outer peripheral side step surface of the small diameter portion 32 of the inner cylindrical member 31. It faces 34.

Since the intermediate shaft 21 is elastically supported in this manner, when a large axial load is applied to the intermediate shaft 21 by the pulling force from the drive shaft 14 side, the ball is moved toward the intermediate shaft 21 side. The axial displacement of the elastic body 40 interposed between the inner tubular member 31 mounted via the bearing 26 and the outer tubular member 42 provided on the bracket 41 on the engine 1 side is caused by the stopper 43 provided on the outer tubular member 42. It is regulated by contacting the outer peripheral side step surface 34 of the inner cylinder member 31 from the axial direction, and further displacement of the intermediate shaft 21 is prevented. As a result, it is possible to prevent the elastic body 40 from being excessively deformed and improve its durability.

The displacement of the intermediate shaft 21 in the opposite direction is regulated by the differential device 3 housed in the gear case 6 integrated with the engine 1 with the axial direction regulated as shown in FIG. Also, the intermediate shaft 2
When a large radial load is applied to 1, the stopper 43 contacts the outer peripheral surface of the small diameter portion 32 and prevents the elastic body 40 from being excessively displaced in the radial direction.

Here, the inner cylinder member 31 and the bracket 41 fixed to the outer race 28 of the ball bearing 26 as in the embodiment.
If the elastic body 40 is provided between the outer cylinder members 42 provided in the outer cylinder member 42, the capacity of the elastic body 40 can be increased as compared with the case where the elastic body is directly provided between the outer cylinder member 42 and the outer race 28. The flexibility of setting elasticity can be increased.

The present invention relates to a front-wheel drive vehicle having an engine vertically installed, a front-wheel drive device for a four-wheel drive vehicle, a vehicle having an engine at the rear of a driver's seat and a rear wheel as a drive wheel, and a rear-wheel drive vehicle having an engine rear part. Etc. can also be applied.

(Effects of the Invention) As described above, according to the present invention, in a vehicle in which an intermediate shaft is provided in a wheel drive device, an inner race of a bearing is fixed to an outer periphery of the intermediate shaft, and an outer race of the bearing is provided in an inner cylinder member. The inner cylinder member is supported by the bracket fixed to the engine via an elastic body, and a small diameter portion is formed on the outer circumference of the inner cylinder member via the outer peripheral side step surface. By providing a stopper facing the outer peripheral surface and the outer peripheral side step surface of the small diameter part of the member and restricting the radial displacement and the axial displacement of the elastic body, when a large load acts on the intermediate shaft in the radial direction or the axial direction, Only by combining the inner cylinder member and the stopper, radial displacement and axial displacement of the elastic body can be prevented, and the durability of the elastic body can be improved with a simple structure with a small number of parts. so Wear.

[Brief description of drawings]

FIG. 1 is a schematic front view of a wheel drive device, FIG. 2 is a partially cutaway front view of a portion where an intermediate shaft is assembled, FIG. 3 is a bottom view of an intermediate shaft in which this support structure is broken, and FIG. 4 is an elastic body. It is an expanded sectional view of a part. In the drawings, 1 is an engine, 2 is a transmission, 3 is a differential device, 4 and 5 are output shafts, 11 and 16 are wheels, 8 and 14 are wheel drive shafts (drive shafts), 21 is an intermediate shaft, 26 is a bearing (ball bearing), 27 is an inner race, 28 is an outer race, 31 is an inner cylinder member, 32 is a small diameter portion, 34
Is an outer peripheral side step surface, 40 is an elastic body, 41 is a bracket, 42
Is an outer cylinder member, and 43 is a stopper.

Claims (1)

[Scope of utility model registration request] 1. An engine is mounted, a transmission is connected to the engine, and a differential gear connected to the transmission is arranged offset from the vehicle width center, and one output shaft of the differential gear is provided. A vehicle in which one wheel drive shaft is connected to the other output shaft of the differential device and the other wheel drive shaft is connected to the other output shaft of the differential device via an intermediate shaft extending in the vehicle width direction. The inner race of the bearing is fixed, the outer race of the bearing is housed in the inner tubular member, and the inner tubular member is supported by a bracket fixed to the engine via an elastic body. A small diameter portion is formed on the outer periphery through the outer peripheral side step surface, and a stopper facing the outer peripheral surface and the outer peripheral side step surface of the small diameter portion of the inner tubular member is provided on the bracket to displace the elastic body in the radial direction and the shaft. Regulate directional displacement Intermediate shaft support structure for a vehicle, characterized in that,.