JPS63162330A - Power transmission device for articulate vehicle - Google Patents

Abstract

PURPOSE:To reduce the turning radius and improve the turning stability by mounting an engine onto a front part car body so that the output shaft side is directed to the front part of the car body and connecting the output shaft of a reduction gear positioned in the most front part of the front part car body and a front axle through a propeller shaft. CONSTITUTION:As for an articulate vehicle 6, a front car body 20 having a front axle 1 and a rear car body 4 having a rear axle 3 are connected in turnable ways by the longitudinal pins 5a and 5b, and connected through the right and left steering cylinders in pairs. In this case, an engine 7 is mounted onto the front car body 20 so that the output shaft 7a is directed to the front part of the car body, and a torque converter 8, transmission 9, and a reduction gear 10 for transmitting the output of the engine 7 are arranged in succession in front of the output shaft 7a. An output shaft 23 projectingly installed onto an output flange 22 under the reduction gear 10 positioned at the most front part of the front car body 2 and the front axle 1 are connected by a front side propeller shaft 24.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power transmission device for an articulated vehicle.

[Conventional technology]

Conventionally, as shown in FIG. 6, a front vehicle body 2 having a front axle 1 and a rear vehicle body 4 having a rear axle 3 are rotatably connected by vertical pins 5a and 5b, and the front vehicle body is connected by a bearing portion 18. 2 can swing horizontally, vertically, and
Also, an articulated vehicle 6 is known in which a front vehicle body 2 and a rear vehicle body 4 are connected by a pair of left and right steering cylinders (not shown). This articulated vehicle 6 has an engine 7 mounted almost in the center of the front body 2 with its output shaft side 7a facing the rear of the front body 2, and transmits the output of the engine 7 to the rear thereof. A torque converter 8, a transmission 9, and a reduction gear 10 are arranged in this order. Furthermore, output shafts 12a and 12b are protruded from the front and rear sides of the output flange 11 at the lower part of the reduction gear 10, and the output shaft 12a and the front axle 1 are connected by a front propeller shaft 13, so that the engine 7 is transmitted to the front axle 1, and the output shaft 12b protruding rearward is connected to the rear axle 3 by rear propeller shafts 14, 15 and 16, and the power is transmitted to the rear axle 3. It is something that will be done.

[Problem that the invention seeks to solve]

However, the front propeller shaft 13 follows the vertical movement of the front axle 1, and needs to be sufficiently long for strength and durability, and the rear propeller shaft 14 also needs to be long enough to keep up with the vertical movement of the front axle 1. The distance L1 between the front axle 1 and the vertical bins 5a and 5b is inevitably long because it requires a sufficient length to allow large bending in the left and right direction of the front axle 3 and to ensure strength and durability. Therefore, as shown in FIG. 7, if the front axle bending angle α is increased to a bending angle α− in order to reduce the turning radius of the articulated vehicle 6 and make a tight turn, then when turning to the left, the front axle will be A rightward force acts on the vehicle body 2 in the traveling direction, and the grounding point A of each of the left and right front tires 17a, 17b is originally.

Even if there is a difference in the load on B, there is no problem with running, at least the one that was standing on the right side grounding point B now has the grounding points on A' and B', and the difference in the load on each is now reduced. As the load on the ground contact point A' becomes extremely small, the load on the ground contact point A' becomes extremely small, causing the vehicle to slip on muddy ground and become unable to travel.If the load decreases even further, the stability of the vehicle worsens, and there are problems in that it is difficult to turn around.

The present invention has been made to solve these problems, and an object of the present invention is to provide a power device for an articulated vehicle that can turn in a small radius and exhibit excellent stability when turning. do.

[Means for solving problems]

In order to achieve the above object, the power transmission device for an articulated vehicle according to the present invention connects a front vehicle body having a front axle and a rear vehicle body having a rear axle so as to be rotatable with a vertical pin, and also connects both vehicle bodies in a left and right pair. In an articulated vehicle connected by a steering cylinder, the engine is mounted on the front body with its output shaft side facing the front of the body, and the torque converter, transmission, and reduction gear are sequentially arranged and connected in front of the engine. The present invention is characterized in that the output shaft of the speed reducer located at the forefront of the vehicle body and the front axle are connected by a propeller shaft.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

Note that the same components as those in the conventional example will be described with the same reference numerals.

1 to 5 show an embodiment of the present invention, and like the conventional example shown in FIG. 6, an articulated vehicle 6 has a front body 20 having a front axle 1 and a rear axle 3. The rear body 4 has vertical pins 5a, 5.
The front vehicle body 20 and the rear vehicle body 4 are rotatably connected to each other by a pair of left and right steering cylinders 21a, 2.
It is connected by 1b. and the front body 20
The engine 7 is mounted so that its output shaft side 7a faces the front of the vehicle body, and a torque converter 8, a transmission 9, and a reduction gear 10 for transmitting the output of the engine 7 are sequentially arranged in front of the engine 7. The lower output flange 22 of the reduction gear 10 located at the forefront of the front vehicle body 2
The output shaft 23 protruding from the rear side and the front axle 1
are connected by a front propeller shaft 24 to transmit the power of the engine 7 to the front axle 1, and an output shaft 25b which is concentric with the input shaft 25a of the front axle 1 and protrudes rearward, and the rear The rear axle 3 is connected to the rear axle 3 by rear propeller shafts 14, 15 and 16, and the power of the engine 7 is transmitted to the rear axle 3.

According to this embodiment constructed in this manner, two propeller shafts 13° and 14 were conventionally disposed between the front axle 1 and the rear vehicle body 4 as shown in FIG. On the other hand, since one propeller shaft 24 is disposed in front of the front axle 1 and the other propeller shaft 14 is disposed behind the front axle 1, both propeller shafts 24 and 14 have sufficient strength and durability. It is possible to ensure a sufficient length to follow the vertical movement of the front axle 1 or to allow large bending of the front vehicle body 20 in the left and right direction, and the front axle 1 is Being located at the rear of the vehicle body 20, the distance L2 between the front axle 1 and the longitudinal bins 5a, 5b can be shortened, and therefore the bending angle α of the front axle 1 can be increased to increase the bending angle α as shown in FIG. Even with the angle α', the grounding point B of the right front tire 17b moves to the position B', but unlike the conventional case, the grounding point B
and B' are lined up almost on the same line in the front and rear, so there is no change in the load on the grounding points B and B'', and the articulated vehicle 6 can maintain a stable running condition without the risk of slipping and maintain its turning radius. As a result of being able to make the front axle 1 close to the vertical bins 5a and 5b, the wheelbase L3 can also be made smaller.
Vehicles can be made more compact, lighter, more maneuverable, and more fuel efficient.

Further, as shown in FIG. 4, the propeller shaft 14 is
Both connecting ends 14a, 14b and bending center 0 (vertical pin 5a)
, 5b) so that the distances Jl and J2 between them are equal, when the front axle bending angle is α, the inclination angle β of the propeller shaft 14 is ten times α, so that the Constant velocity joint 26a, 26
The strength and durability of b are significantly improved.

Furthermore, as shown in FIG. 5, in this embodiment, the front axle 1 has concentric input shafts 25 arranged in the front and back.
a and an output shaft 25b, and a coupling 27 is provided therebetween. This coupling 27 is the fifth
When moved to the left side in the figure (to the front of the vehicle body), the input shaft 25a and both shafts 25a are fitted together.

25b is combined to form a differential lock, and rotation is transmitted regardless of slippage.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to ensure that the propeller shafts located in front and rear of the front axle each have sufficient strength and durability and have sufficient length to operate. By shortening the distance between the front axle and the vertical pin, it is possible to make tighter turns while maintaining stable driving conditions, and the wheelbase can also be made smaller, making the vehicle more compact, lighter, and more maneuverable. It is also possible to improve fuel efficiency, improve fuel efficiency, etc.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention = 11
- Therefore, Figure 1 is a side view, Figure 2 is a plan view, Figure 3 is an explanatory diagram when turning left, Figure 4 is a sectional view of the propeller shaft, and Figure 5 is a cross-sectional view of the propeller shaft.
The figure is a sectional view of the front axle, and FIGS.
The figures show an example of a conventional dynamic horn transmission device for an articulated vehicle, with FIG. 6 being a side view and FIG. 7 being an explanatory view when turning left. 1...Front axle 2, 20...Front vehicle body 3...Rear axle 4...Rear vehicle body 5a,
5b... Vertical pin 6... Articulated vehicle 7... Engine 7a... Output shaft side 8...
Torque converter 9...Transmission 10...Reducer 12a, 12b, 23-...Output shaft of reducer 1
3゜24...propeller shaft 21a, 21b・
・Steering cylinder

Claims (1)

[Claims] 1. In an articulated vehicle in which a front body with a front axle and a rear body with a rear axle are rotatably connected by a vertical pin and both bodies are connected by a pair of left and right steering cylinders, the engine is mounted on the front body. The output shaft side is mounted with the output shaft facing the front of the vehicle body, and a torque converter, a transmission, and a reduction gear are sequentially arranged and connected in front of the vehicle body, and the output shaft of the reduction gear located at the forefront of the front vehicle body and the front axle are connected. A power transmission device for an articulated vehicle, characterized in that the two are connected by a propeller shaft.