JPS6092909A - Rear two-axle type vehicle - Google Patents

Abstract

PURPOSE:To aim at improvements in steerability and safety, by making a supporting point at the car body side of each of upper and lower torque rods lower than that at the axle side, in case of a car which sets up a self-steering type axle at the rear of a rear axle. CONSTITUTION:A large-sized rear-drive bus 10 is provided with a self-steering type rear axle 13 at the rear of a rear axle 12. And, each of upper and lower torque rods 19 and 20 is set up in a vertical direction of the rear axle 12 at a proper interval and each of front ends 21 and 22 is rotatably coupled with a car body 11 while each of rear ends 23 and 24 to the rear axle 12 via each pin, respectively. In this case, each of supporting points 25 and 26 at the car body side of each of rods 19 and 20 is made to be lower than corresponding supporting points 27 and 28 at the axle side. That is to say, each of these rods 19 and 20 is tilted foward. With this constitution, the bus 10 is preventable from such turning motion as being possible spinning out and, what is more, also in case of straight drive running, steerability and safety are thus improvable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a rear two-axle type vehicle in which a self-steering type rear axle is disposed behind the rear axle.

Conventionally, this type of vehicle uses upper and lower torque rods that are rotatably connected to the vehicle body at the front end and to the rear axle at appropriate intervals in the vertical direction. Since the fulcrums on the vehicle body side of the lower torque rod and the lower torque rod are set at approximately the same height as the axle side fulcrums of the corresponding Ara i4 and lower torque rod, it is possible to increase the stable running speed limit. In addition, when turning, the rear axle tends to oversteer when the vehicle rolls due to lateral acceleration.

An object of the present invention is to provide a rear two-axle vehicle that improves maneuverability and stability, increases the limit speed for stable running, and further improves braking stability when turning.

In order to solve these problems, the rear two-axle vehicle of the present invention has a self-steer type rear axle located behind the rear axle, and an upper torque rod and a lower torque rod arranged at appropriate intervals in the vertical direction. Torque rods are arranged, and the front ends of the upper and lower torque rods are rotatably connected to the vehicle body, and the rear ends of the upper and lower torque rods are rotatably connected to the rear axle. and those upper and lower torques.
A configuration in which the vehicle body-side fulcrums of the rods are lower than the axle-side fulcrums of their corresponding upper, lower, and lower torque rods, so-called upper and lower torque rods are placed forward and downward between the vehicle body and the rear axle. The structure is designed to suit the needs of the user.

Hereinafter, preferred specific examples of the rear two-axle vehicle according to the present invention will be described with reference to the drawings.

1 and 2 illustrate a rear twin axle vehicle 10 of the present invention embodied as a large rear engine bus.

The large rear engine bus IO has a self-steering type rear axle 13 located behind the rear axle 12, and the rear axle 12 has a clutch 15, a transmission 16, a propeller shaft 17, and a final reduction gear. It is driven by the engine 14 via 18.

The rear axle 12 is of course connected to the vehicle body 11 by a leaf spring (not shown), and elastically supports the vehicle body 11 via the leaf spring.

Also, for the rear axle 12, the upper torque rod and the lower torque rod 19.20 are vertically spaced apart from each other at appropriate intervals, and the front end 21.22 is connected to the vehicle body.
1, the rear ends 23, 24 are rotatably connected to the rear axle 12 via pins, respectively.

In particular, those upper and lower torque rods 19.
20, the vehicle body side fulcrums 25 and 26 are lower than the corresponding axle side fulcrums 27 and 28, respectively. As such, the upper and lower torque rods 19
．． 20 is inclined forward and downward and is disposed between the vehicle body 11 and the rear axle 12.

As such, Ano Sen and Lower Torque Rod 19
．． 20 is disposed between the vehicle body 11 and the rear axle 12, so even if the bus 10 turns and the vehicle body 11 rolls due to lateral acceleration, the rear axle will move in the direction that increases the turning radius. , that is, it causes a tendency to change direction in the direction of amplifier steering, causing the bus 10 to spin.
It prevents turning that would cause the vehicle to go out of bounds, improves maneuverability and stability even when driving in a straight line, and increases the limit speed for stable driving.

According to the above invention, the upper and lower torque
The rods are arranged at appropriate intervals in the vertical direction, and their front ends are rotatably connected to the vehicle body and their rear ends are rotatably connected to the rear axle, and furthermore, the support points of the upper and lower torque rods on the vehicle body side are The corresponding axle-side fulcrums of the upper and lower torque rods are also lower, which improves maneuverability and stability in rear dual-axle vehicles with a self-steer rear axle located behind the rear axle. The stability of the vehicle is improved, the limit speed for stable running is increased, the braking stability during turns is improved, and turns that would cause a spin-out are prevented.

As mentioned above, from the specific examples of this invention described with reference to the drawings, various design modifications and changes can be easily made by those who have ordinary knowledge in the technical field to which this invention pertains. Furthermore, the structure of this invention can be easily replaced with an embodiment essentially the same as this invention that satisfies essentially the same problems as that invention and achieves the same effects as this invention. I guess it will happen.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of a large rear engine bus that is a specific example of the present invention, and FIG. 2 is a bottom view of the bus shown in FIG. 1. 11...Vehicle body, 12...Rear axle, 13...
・Self-steer type rear axle, 19...Upper torque rod, 20...Lower torque rod,
25.26... Vehicle body side fulcrum, 27, 28... Axle side fulcrum.

Claims (1)

[Claims] A self-steer type rear axle is arranged behind the rear axle, and an upper
Place the torque rod and lower torque rod,
and the front ends of the upper and lower torque rods are rotatably connected to the vehicle body, and the rear ends of the upper and lower torque rods are rotatably connected to the rear axle, respectively. A rear two-axle vehicle characterized in that the corresponding fulcrums of the torque rods on the vehicle body side and the axle side skin points of the lower torque rods are also low.