JPH0134177B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for installing a retarder in a rear-engine, rear-wheel, two-axle vehicle.

Rear engine bus vehicles and the like are generally equipped with a deceleration retarder connected to the propulsion shaft.

By the way, when a two-axle rear wheel is adopted for larger and more luxurious sightseeing buses, etc., a retarder is directly connected to the output shaft of the transmission installed behind the rear axle that serves as the drive shaft. This makes the rear overhunk (the part that protrudes behind the rear axle of the vehicle) undesirably large. Further, if a retarder is installed between the rear front axle and the rear axle, the distance between the two axles becomes large, which leads to a decrease in driving performance such as turning performance, which is also undesirable.

Therefore, it is preferable to install a retarder in front of the rear and front axles, but if a straight dead axle (an axle that only supports the wheel load without transmitting driving force) like that used in truck vehicles is used, the retarder and trans In order to avoid interference between the shaft connecting the transmission and the dead axle, the retarder must be installed at a high position, which is difficult to implement as the vehicle floor becomes too high.

The present invention has been made in view of such problems,
A retarder is installed in front of the rear and front axles of a rear-engine, rear-wheel, two-axle vehicle, and the axle for the rear and front axles is shaped so that the center part is sunken downward to avoid interference with the connecting shaft between the retarder and the transmission. In particular, the present invention provides a retarder mounting structure that eliminates the above-mentioned problems.

The present invention will be explained in detail below based on illustrated embodiments.

In FIGS. 1 to 3 showing one embodiment, an engine (not shown) is mounted at the rear end of a rear-wheel, two-axle bus vehicle, and a transmission 1 is directly connected in front of the engine. The transmission 1
The output shaft of the rear shaft 2 and the input shaft of a final reduction gear 3 incorporated in the center of the axle of the rear shaft 2 are connected via a first propeller shaft 4.

Further, as the axle 6 for the rear front axle 5, a front axle in a front engine rear drive vehicle is used. In order to avoid interference with the second propeller shaft 11, the axle 6 is formed into a depressed shape at the center (referred to as a bent-down shape). However, since the front axle is used as is, the wheels can turn freely, so by rigidly connecting the lower ends of the knuckle arms 61 on both sides and the bracket 62 fixed to the axle body 60 with the rod 7, the wheels can turn freely. The structure should be such that it provides straightness.

On the other hand, a retarder 10 is fixedly attached to the vehicle body frame 8 on both sides via a bracket 9 in front of the rear front axle 5. The input shaft of the retarder 10 and the front end output shaft of the final reducer 3 are connected via a second propeller shaft 11.

Here, since the axle 6 of the rear-front shaft 5 has a bent-down shape as described above, the middle part of the second propeller shaft 11 is brought close to the upper part of the depressed center part of the axle 6 of the rear-front shaft 5. By arranging the second propeller shaft 1
As shown in the figure, the mounting position of the retarder 10 can be lowered as much as possible while avoiding interference between the retarder 10 and the axle 6 of the rear-front shaft 5.

In this way, the retarder 10 can be attached to the rear and front axles without increasing the rear overhunk, the distance between the axles, or the vehicle height.
It can be installed compactly in the front upper space of the
Limited underfloor space can be used effectively. In addition, since the axle of the rear and front axles is formed using the front axle of a front engine rear drive vehicle, the number of parts and management man-hours can be reduced, compared to designing and manufacturing a dedicated axle. Significant cost reductions can be achieved.

As explained above, according to the present invention, the axle of the rear-front axle of a rear-engine, rear-wheel two-axle vehicle is formed using the front axle of a front-engine, rear-drive vehicle, and the end of the rear-rear axle is formed using the front axle of a front-engine, rear-drive vehicle. The configuration in which the retarder, which is connected to the reducer via the propeller shaft, is installed in the upper space in front of the rear and front axles allows for a rational drive system layout and effective use of the limited underfloor space. It is possible to reduce the number of points, reduce management man-hours, and reduce costs associated with this.

[Brief explanation of drawings]

1 to 3 are a front view, a side view, and a plan view showing essential parts of an embodiment of the present invention. 2... Rear shaft, 3... Final reduction gear, 4... First propeller shaft, 5... Rear front shaft, 6... Axle, 9... Bracket, 10... Retarder, 11... Second propeller shaft.

Claims (1)

[Claims] 1 In addition to installing the engine at the rear end of the vehicle,
The front end output shaft of the transmission, which is directly connected to the front of the engine, and the input shaft of the final reduction gear, which is installed in the center of the axle of the rear shaft located in front of the transmission, are connected via a first propeller shaft. In front of the final reduction gear, an axle of a rear-front axle is arranged in front of the final reduction gear, which is formed by rigidly connecting the axle body of the front axle with a depressed center part and the knuckle arms on both sides with a rod in a front engine rear drive vehicle. , an intermediate portion of a second propeller shaft whose rear end is connected to the front end output shaft of the final reduction gear is disposed close to above a depressed central portion of the axle of the rear-front shaft, and the second propeller shaft A retarder installation structure for a rear-engine, rear-wheel, two-axle vehicle, characterized in that a retarder is connected to the front end of the shaft.