JPS5878867A - Steering unit of automobile - Google Patents

Abstract

PURPOSE:To prevent lost control of steering as well as to heighten the stability in going straight in a front-wheel-driven type car, which has driving shafts of unequal length, by increasing the amount of toe-in of a front wheel at the longer driving shaft side when said front wheel is driven. CONSTITUTION:At the chassis outer ends of tie-rods 2 and 4, wheels 24a and 24b are connected rotatably to each other via a ball-point 18 and a knuckle- arm 20, while the upper part of the knuckle-arm 20 is connected to the chassis by a strup 26. The tie rod 2, which is located at the same side as a longer driving shaft 6, is divided into two parts 2a and 2b, between which an elastic connecting unit 28 is placed. The elastic connecting unit 28 is lengthened owing to a tensile load generated in a tie rod during drive, increasing the amount of toe- in of the right wheel. As a result, lost control of steering wheel being forced toward the longer driving shaft 6 during drive is canceled by the increase of toe-in, giving the front wheel better stability in going straight.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering device for a front wheel drive motor vehicle having drive shafts of unequal length.

Generally, in front-wheel drive vehicles with drive shafts of unequal length, the anhedral angles of the left and right wheels are different, so a difference appears in the moment around the kingpin axis of the left and right wheels during driving.
Dry Rasha 7) There is a drawback that the handle is on the ugly side.

In order to eliminate the conventional disadvantage of having the handle on the longer side of the drive shaft, in JP-A-52-Coco 2Jj, the center cutout amount of the wheel on the longer side of the shaft was made larger than on the other side. However, there is a problem in that the asymmetry in the amount of rotation of the wheel causes the wheel to sag when braking during kick pack.

Mochiku, Sanekiaki ≠ 2-2003? In the issue, differential gear O
It was proposed in No. 117/31233 that the center shaft of the 11 rotation be tilted in the vertical direction, and in 1% 117-/31233, an idling device was proposed to drive the shorter drive shaft from side to side, and to reduce the angle of inclination with respect to the axle. Although it has been proposed to tilt the differential gear or the entire armpit, it is undesirable due to the structure of the automobile.

The present invention was developed in view of the above-mentioned conventional problems, and was developed in Marugame.
The purpose of this system is to provide a steering system tube for automobiles that eliminates nodal build-up during driving by adding component pipes to conventional steering systems, and provides high straight-line stability. The feature is that in automobiles with drive shafts of unequal length, the long drive shaft side tie bulge P is divided, and an elastic member tube is interposed at the connecting portion of both of the two divided tie bulges.

And, it is a straight horn that restricts the length of tie red only in one direction! -1- It is configured such that the toe-in amount of the front wheel on the long drive shaft side is increased during driving.

Embodiments of the present invention will be explained below based on the drawings.

First Example #i, as shown in FIGS. 1 and 2.

The tie rods 2 and 4 are disposed rearward than the drive shaft 7) 6.8. The differential gear lO is arranged closer to the left wheel 24b than the right front wheel 24a, and therefore the right drive shaft 6 is longer than the left drive shaft 8. Tie rod 2.4 is center link 11
concatenated by -&! Interlink 11Kti is stored in a steering case 12 and connected to the steering wheel 1 through nine steering gears and a steering column 14.
6. #i on the outer edge of the tie red 2.4 car body
Wheels 241 and 24b are rotatably connected via the &-knuckle joint 1g and the knuckle arm 20, and the upper part of the knuckle arm 20 and the vehicle body are connected by a structure 26. It is divided into tie rods 2ti2a%2b on the same side as the long drive shaft 6, and an elastic coupling device 28 is interposed between them. As shown in Figure 3, the elastic coupling device 28 has a small diameter portion 32 at the end of the tile rod 2bO inserted into a hole 30 at one end of the tie rod 2. This tip small diameter part 3
A smaller base diameter portion 34 is further provided in the second cultivation center. A hole 3 with a diameter larger than the diameter of the root small diameter part 34 and smaller than the diameter of the tip small diameter part 320 is provided at the tie rod 2/O end.
A lid member 38 having a diameter of 6 is fixed. Then, the tip small diameter portion 32 of the tie rod 2b is connected to the end O of the tie rod 2a.
An elastic member 40 made of rubber or mineral spring is suitably compressed between the small tip 41 portion 32 and the lid member 38 which are formed when the hole 30 is pushed in until it converges on the bottom of the hole 30 (the state shown in FIG. 3). inserted. The elastic coupling device 28 having the above configuration has a third
Based on the condition shown in the figure.

dl is relatively displaced in the direction of pulling the tie sets 2m, 2b apart from each other, but is not relatively displaced in the direction of pushing the tie rods 2m, 2b together.

In the above configuration, the elastic coupling device 28 expands due to the tensile load generated on the tie rod during driving, resulting in g/
As shown by the dotted line in the figure, the toe-in amount of the right wheel increases. As a result, the hand movement toward the long drive shaft 6 during driving is caused by the increase in toe 4 during driving.

Improves straight-line stability.

In the fourth embodiment of the present invention, as shown in the iris diagram and the diagram IIj, the tie rod 52.
58. As shown in FIG. 5, in comparison with the jII/embodiment, the elastic coupling device 60 of the goose 91 has a small diameter portion 64 at the end of the tie rod 52b and the elastic member 6 inside the O hole 62 at the end of the tie rod 52m.
6 has been replaced. Therefore, the elastic coupling device 60 having one or more configurations changes relative to the direction in which the tie rods 52a, 52b are pushed together with respect to the state shown in FIG. There is no relative displacement in the direction of separation. Other configurations of the irises 2% example are No. 1111
Since this is the same as the I/A example, the same code tube as in the first embodiment is only attached to one drawing, and its explanation will be omitted.

In the above configuration, the elastic coupling device 60 is shortened by the congress load generated on the tie during driving, and the amount of toe-in of the right wheel increases as shown by the dotted line in FIG. As a result, the drive shaft 6 is O-long when standing upright.
The steering wheel's deflection toward the side is canceled out by the increase in toe-in during driving, improving straight-line stability.

[Brief explanation of drawings]

Fig. 1 is a plan view of the first embodiment, Fig. 2 is a rear view of the first embodiment, Fig. 3 is a sectional view of the elastic coupling device of the first embodiment, and Fig. 4 is a plan view of the λ embodiment. 3 are sectional views of the elastic coupling device of the second embodiment. 2.4...Tie rod. 6.8...Drive shaft. 10・■D7 areno sial gear. 11... Seven links. 16...Steering wheel. 20... Knuckle arm, 28... Elastic coupling device. 40...ψ elastic member, 52.54... tie rod. 56.58 fist...drive shaft. 600・Elastic connection device, 66...Elastic member anesthesia applicant
Toyo Kogyo Co., Ltd. Figure 1 Figure 3 Figure 6 Figure 4 Figure 5 1 0

Claims (1)

[Claims] l) In automobiles with drive shafts of unequal length,
The tie rod on the long drive shaft side is divided, and an elastic member is interposed at the joint between the two divided tie rods, and a stone Δ- is provided to limit the change in the length of the tie rod in only one direction. A steering device for an automobile, characterized in that the toe-in amount of the front wheel on the long drive shaft side is increased during kIIA operation.