JPS59156824A - Wheel drive - 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 The present invention relates to a wheel drive system for an automobile in which each wheel is suspended on a crankshaft.

Many solutions are known for providing a drive at each suspended wheel (Bussien, Handbook of Automotive Engineering,
Volume 1 (1953) p. 621).

In known proposals, the wheels are supported on the vehicle frame via rods and torque struts. The drive shaft has joints at both ends,
It only plays the role of transmitting rotational torque.

The known arrangement has the disadvantage that a large number of structural members are required to operate each wheel and provide rotational torque to each wheel. Furthermore, if a large number of structural members are used as described above,
The disadvantage is that the unsprung mass is increased, since the mass of the above-mentioned components is added, at least in part, to the wheel mass.

SUMMARY OF THE INVENTION It is an object of the present invention to create a driven wheel suspension that has fewer structural members than conventional structures and that reduces unsprung mass to a minimum.

This purpose is achieved according to the invention by: a) providing a first gear joint on the joint side of the crankshaft; b) providing a second gear joint on the axis of rotation of the associated wheel; c) providing a second gear joint on both gear joints. This is achieved by axially supporting a common drive shaft on the geared steps; d) configuring the common drive shaft of both geared steps as part of a steering triangle for operating the wheels in question. .

The above arrangement has the advantage that the drive shaft performs a double function, namely as drive shaft for the wheel in question and as part of the wheel support, and thus replaces the rod. .

Due to the inventive design of the geared step, the drive shaft connecting the two geared steps can absorb a portion of the lateral forces via the geared step.

Another advantage of the wheel drive according to the invention is that the differential can be arranged in front of the axle of the rear wheels in the direction of travel. Thus, the safety of the car can be improved by placing the tank in front of the rear zone.

In another embodiment of the invention, the drive shaft, which is connected to the bevel gear so as not to idle by means of a tooth row, has a partially spherical surface in a plane perpendicular to the plane formed by the axes of both drive shafts and passing through a common conical generatrix. contact each other through.

This strategy requires that the compressive loads inducing transverse forces acting on the wheel are transmitted only via the drive shaft common to both gear joints, thus resulting in the engagement of both tooth rows in mesh with each other. has the advantage of not being affected by the above load.

According to another characteristic of the invention, the inner ends of the drive shafts are each provided with an axial securing element.

Thus, tension forces acting on the drive shaft are absorbed by the partially spherical support surface of the bevel gear.

In a further development of the invention, the coupling housing is connected to a bevel gear in such a way that it does not rotate, but can pivot in a plane formed by the two axes of rotation of the bevel gear.

By this measure, the housing rotates synchronously with the bevel gear and can be used, for example, to measure and evaluate deceleration, acceleration or rotational speed if the housing is provided with corresponding markings.

The invention will now be described in detail with reference to illustrated embodiments.

The driven wheel 5 is supported by a crankshaft 1 which is rotatably connected to the support column 2 via a bearing 9. The wheels 5 are suspended on the vehicle frame (not shown) by means of elastic legs which at the same time act as shock absorbers. crank@
A stabilizing mechanism 8 connected to the wheel 1 and pivotally supported by the strut 2 improves the curve characteristics of the vehicle. A first gear type joint 3 is provided.

FIG. 6 shows the structure of the gear-shaped steppers 6, 4.

For reasons related to installation, the gear-shaped joint used in the wheel drive device according to the invention is essentially assembled from two parts.
It consists of a coupling housing 18 holding therein two bevel gears 15,16. The force gear has two drive shafts 7 and 1.
1 is connected to prevent it from spinning idly. The drive shaft 7.11 is
At the center of the joint housing 18, it abuts with a partially spherical support surface of just the radius. The drive shafts 7, 11 are secured against °C1 tension by means of an axial securing member 17.

A guide pin 16 is inserted into the bevel gear 15 and engages with a guide slit 14 provided in the joint housing 18 . The circumferential length of the guide slit 140 is designed in such a way that the bevel gear 15 can achieve the required relative interlocking with respect to the coupling housing 18. The coupling housing 18 rotates synchronously with the bevel gears 15, 16 via guide means, so that measurements can be read, for example with respect to an anti-skid system, if corresponding markings are provided on the housing.

In order to absorb the turning movement caused by the collision of the wheels 5, the drive shaft 7
can be rotated about the longitudinal axis of the drive shaft 11 in the area of the associated opening 12.

The entire drive line is configured in a so-called "z arrangement", and the bending angles of both gear joints 6, 4 are equal in all positions, so the output of the differential 10 and the wheels 5 are Fully synchronized.

Pillar 2. The crankshaft 1 and the drive QIi7 form a triangle in which the force acting on the wheels 5 is supported by the frame. In this case, part of the lateral force acting on the wheel 5 is
It is received by the drive shaft 7.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the wheel drive device according to the present invention, Fig. 2 is a side view of the wheel drive device seen from inside the vehicle, and Fig. 6 is a gear type joint constituting the wheel drive device. FIG. 1...Crankshaft 2...Strut 3+4...Gear type joint 5...Wheel 6...Elastic leg 7 with shock absorber; 11...
Drive shaft 8... Stabilizer 9... Wheel bearing 10... Differential device 12...; I port 16... Guide pin 1
4.Guide slit 15+16..Bevel gear 18..1. wabite housing

Claims (1)

[Claims] l) A wheel drive device for an automobile in which wheels are each suspended on a crankshaft, in which: a) a first gear joint (3) is provided on the drive side of the rotating shaft of the crankshaft (1); b)
A second gear type joint (4) is attached to the rotation shaft of the related wheel (5).
c) a drive shaft (7) common to both gear joints (3, 4) is supported axially on the gear joint; d) both gear joints (3, 4) ) common drive shaft (
7) is a component of a steering triangle that operates the wheel (5). 2. The wheel drive device according to claim 1, wherein the side opposite to the tooth row is formed as a partial sphere, each connected to the drive shaft so as not to idle, and at least the inner surface of the bevel gear. In a type of joint having two gear-shaped joints consisting of two mutually meshing bevel gears guided in a joint housing configured as a sphere corresponding to a partial spherical surface, e) bevel gears (15, 16 ) are in contact with each other with their partial spherical surfaces in a plane perpendicular to the plane formed by the axes of both drive shafts and passing through a common conical generatrix; A wheel drive device characterized in that each end is provided with an axial securing member (17). 3) g) jJ hand housing (18) does not spin idly,
One bevel gear (15, 16) is designed so that it can turn within a plane formed by the rotation axes of both of the bevel gears (15, 16).
).
The wheel drive device according to Items 1 and 2.