JPS5871207A - Strut type suspension of front wheel drive vehicle - Google Patents

Abstract

PURPOSE:To minimize a difference between the downward camber angles of long and short drive shafts in a front wheel drive vehicle provided with said drive shafts differing in length by unequalizing both lengths of left and right lower arms and making the short lower arm to support the front wheel of the short drive shaft. CONSTITUTION:When a vehicle is started or suddenly accelerated, the front part of the vehicle's body 1 is jumped and an inclination angle alphaL of a left drive shaft 6B with respect to the road surface 11 exceeds an inclination angle alphaR of a right drive shaft 6A since the left drive shaft 6B is shorter than the right drive shaft 9A. On the other hand, since a left lower arm 2B is shorter than a right lower arm 2A, a camber angle betaL of a left front wheel 5B exceeds a camber angle betaR and an inclination angle gammaL of the left wheel 5B with respect to the road surface 11 also exceeds an inclination angle gammaR of the right wheel 5A. The downward camber angle deltaL may be hence approximately equal to the downward camber angle deltaR, preventing the steering wheel from being thrown into the reverse direction of control.

Description

[Detailed description of the invention] The present invention is a front wheel drive vehicle strut. Concerning the improvement of the engine.

In the strut suspension system of F-F cars (front-engine, front-drive cars), the arrangement of the power unit such as the engine, clutch, and transmission, and the left and right drive shafts of the front wheels are of unequal length. This is common, and especially when the engine is placed horizontally, the degree of this unequal length becomes thicker.

In a front wheel drive vehicle having such drive shafts of unequal length, due to the difference in the anhedral angle of the left and right drive shafts (the angle between the drive shaft and the axle of the wheel driven by it), There is a side where the handle can be taken on the wheel side with the longer drive shaft.

For this reason, as seen in Japanese Unexamined Patent Application Publication No. 52-22225, it has been known that the drive shaft has a center offset of the longer wheel, and the drive shaft is smaller than the setter offset of the shorter wheel. Set it large to prevent the handle from being taken off due to the dihedral angle (-) difference between the left and right sides (1-
This is the first suspension offered. Also, JP-A-54-138235 or Utility Model Publication No. 49
20039 Publication Vζ"There is also a known device in which the dihedral angle difference is made as small as possible by tilting the differential gear downward in a negative direction.

However, the purpose of conventional devices is to compensate for the dihedral angle difference between the left and right sides when stopped or when driving at a steady state. There is no equivalent consideration for 1st. It wasn't. In other words, if the suspension is installed in such a way that there is almost no difference in the anhedral angle between the left and right sides when the vehicle is stopped or when driving at a steady state, taking into consideration the passenger capacity, etc. Even if it is installed, the front part of the vehicle body will rise significantly during sudden acceleration, causing a difference between the left and right anhedral angles, or this difference will become large. When starting, it was not possible to compensate for sudden acceleration or the anhedral difference in front.

The present invention has been made 7f in view of the circumstances in article 1, and provides a strut suspension in which the difference in left and right F performance at t6 is as small as possible at the time of starting or sudden acceleration. The purpose is to

In order to achieve this object, among the strut arms of the present invention, the lower arm that supports the drive 7 shaft wheel is formed so that the drive shaft is longer than the lower arm of the front wheel with a longer drive shaft.

By adopting lower arms of unequal lengths as described above, when the front of the vehicle rises by r% during start-up or sudden acceleration, the gear brim angle of the heavy wheels supported by the short lower arms will be lower than that of the long lower arm. (/LX is thicker than the camber angle of the supported wheel (this makes it possible to reduce the anhedral angle on the short drive shaft side and the long tribe shirt) if the difference between the anhedral angle of 1111 if In force .

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a lower strut type suspension according to one embodiment of the present invention, and shows the condition when the automobile is running steadily under a normal load condition or when the automobile is stopped. The two lower arms, which are pivotally supported on the vehicle body 1, are connected to the right Ail via joint 3A and knuckle 4A.
Export 5 A is rotatably supported. This right front wheel 5
A is driven by an engine (not shown) by valving the right drive shaft 6A, and -1 of the /yaft is attached to both ends of the right drive shaft 6.
- Joints 7A and 8A are provided that allow downward swinging. A block absorber 9A is installed between the knuckle 4A and the vehicle body 1, and a coil spring knob IOA is installed around the block absorber 9A to bias the right front wheel 5A downward, that is, in the direction of the road surface 11. ing.

On the other hand, the left front wheel 5B is also supported and driven by a structure similar to that of the right front wheel 5A. Therefore, for the parts corresponding to the left front wheel 5B"1, in the figure, instead of the symbol "A" attached to the parts around the right front recess 5A, 1■3
1 is used, and duplicate explanations are omitted.

Here, the left and right drive shafts 6A and 613 have different lengths due to the arrangement of the power units. In other words, left drive shaft 6 IJ is right drive shaft 6
It is shorter than A.

In accordance with] - Driven Yaf), 6A, 61 (, the left lower arm 2B is shorter than the right lower arm 2A (
It is formed.

It is a feature of the present invention that these left and right lower arms 2A, 213 have unequal lengths, and the difference in length is determined by taking into account the difference in length of the left and right drive shafts 6A, 613, the vehicle body size, etc. For example, set the length of the right lower arm 2A to 300 mm. 1, the length of the left lower arm 213 is approximately 200 to 250 nm.

In this example, if the vehicle is within the range of the carrying capacity or the load limit, IJ% i
lj, when the alloy is running steadily, the J-
In other words, under the above conditions, the drive shut 6A (613
) and the axle of the front wheel 5A (513), Tm1, that is, the anhedral angle, are both almost zero, set to Jt.
ing.

Hereinafter, the strut of this embodiment is based on the 1゛old structure.When the vehicle starts or suddenly accelerates from a stopped state or a steady running state as shown in FIG. The left drive shaft 6Bo') is in a state as shown in Figure 2.Here, the left drive shaft 613 is shorter than the right drive shaft 6A', so under the condition shown in Figure 2, the left drive shaft 6Bo') is The inclination angle αI7 is larger than the inclination angle αR relative to the road surface 11 of the right drive yaf]·6A. On the other hand, since the left lower arm 213 is shorter than the right lower arm 2A, the camber angle βI of the left front wheel 5B is larger than the camber angle β1 of the right front wheel 5A. ,
If the front left wheel 5B of the car's IQ11 is at an angle of inclination γI7 with respect to the road surface 11, the axle of the right front wheel 5A is on the road surface] 1 (LLC
It is larger than the tilt angle 7'R made by lighting. Therefore, the anhedral angle δI of the left drive shaft 613 allows the drive shaft 6 to move to the right. That is, the anhedral angle δ1, −αI, −
γI,, anhedral angle δR-αR-γR, but αL 〉α
Even when there is only one seed, β■, becomes larger than βR, and γt >
While changing ra, the anhedral angle becomes δ■--δR.

In the embodiment described above, the left sleeve shirt 613 is longer than the right dry shirt 1-6A. Is this an example of a case where the beanku-shaped J is used, or the Kien Akira, -] Contrary to the second story, the right!・It is not true that it is applicable even in the case where the livery is formed short. In such a case, of course, the lower arm on the right front wheel side or the lower arm on the left front wheel side should be formed.

- Detailed description of the bending The front wheel 1 of the present invention 1 The Straso I type suspension/yono of the front wheel 1 History movement 111 is based on the difference in inclination angle of This is compensated for by the difference in camber angle between the left and right front wheels obtained by making the left and right lower arms unequal lengths, thereby reducing the difference in the anhedral angle of the left and right drive shafts, and as a result, the steering wheel is prevented from becoming uncoupled. It has become.

In the present invention, it is sufficient to change the lengths of the left and right lower arms, so the present invention can be implemented without significantly changing the conventional strut type suspension.

[Brief explanation of drawings]

FIG. 1 shows the state of the strut-type suspension/yeon at rest or steady running according to an embodiment of the present invention.'1-q
2A, 211, 211, 211, 211, 211, 211, 211, 211...・・4'7 arm 5A., 5B・・・・・・・・・・・・・・・・
・Front wheels 6A, 6B ・・・・・・・・・・・・ Driven Yaft (voluntary) procedural amendment 1 Display of case 1982 Patent Application No. 169776 2 Title of invention Strut type suspension for front wheel drive vehicle 3 Relationship with the case of the person making the amendment Patent applicant 4 Agent None 6 Number of inventions increased by amendment None 7 Target of amendment Description

Claims (1)

[Claims] In front wheel drive vehicles with unequal length drive shafts,
A strut type suspension for a front wheel drive vehicle, characterized in that the lengths of the lower arms of the left and right front wheels are unequal, and the front wheel having the shorter drive shaft v is supported by the shorter lower arm.