JPH0545593Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a straddle-type four-wheeled vehicle for traveling on rough terrain.

[Conventional technology]

In the conventional straddle-type four-wheel vehicle 1 shown in FIG. 2, an engine 2 is mounted between a front wheel 1f and a rear wheel 1r, and its crankshaft 3 is oriented with respect to the vehicle traveling direction (arrow A). It extends left and right, and
The cylinder 4 is provided so as to be inclined toward the front side of the vehicle body (toward the right side in the figure).

At the top of the vehicle body, a vertically long seat 6 is arranged extending from the center area to the rear, and a bar handle 1h is arranged at the front of the vehicle body. An air cleaner case 5 is provided, and air is supplied to the air cleaner case 5 through an inlet pipe 8 from an air intake port 7 provided at the front of the vehicle body.

In the straddle-type four-wheel vehicle 1, the output of the engine 2 is transmitted from the crankshaft 3 to the rear axle 10 via the transmission 9 to drive the rear wheels 1r, and from the transmission 9 to the propeller. It is transmitted to the front axle 12 via the shaft 11 and drives the front wheel 1f.

By the way, in the conventional saddle type four-wheel vehicle 1, as is clear from the drawing, the heavy transmission 9 is disposed near the rear wheel 1r.

Therefore, when the straddle-type four-wheel vehicle 1 is traveling, if the weight of the operator is applied to the rear of the seat 6, most of the weight of the vehicle acts on the rear wheels 1r, and the front wheels 1f The balance of weight distribution between the rear wheels 1r and the rear wheels 1r is greatly unbalanced, resulting in an inconvenience that an appropriate driving force cannot be obtained.

[Purpose of invention]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a straddle-type four-wheel vehicle that can obtain an appropriate driving force while driving.

[Structure of the idea]

Therefore, in the present invention, the engine cylinder is tilted toward the rear of the vehicle body, and the engine crankshaft is placed in the front side of the vehicle body with respect to the step in such a manner that it extends in the left-right direction with respect to the vehicle traveling direction. Each transmission shaft is arranged on the front side of the vehicle body with respect to the crankshaft in a manner parallel to the crankshaft, and the transmission is located within the outer diameter range of the front wheel in the region on the center side of the vehicle body with respect to the front wheel. This objective is achieved by locating the bulky transmission near the front wheels.

〔Example〕

Hereinafter, the present invention will be described in detail based on the drawings showing one embodiment.

As shown in FIG. 1, in a straddle-type four-wheel vehicle 20 according to the present invention, an engine 22 is disposed between left and right front wheels 21F and left and right rear wheels 21R.

A vertically long seat 23 extending from the center area of the vehicle body to the rear of the vehicle body is disposed above the engine 22, and a bar handle 24 for steering is provided in the front area of the seat 23 (the right area in the figure). It is arranged,
Furthermore, there are steps 25 on both left and right sides of the vehicle body between the front wheels 21F and the rear wheels 21R.
is provided.

Further, in the front area of the vehicle body, an air cleaner case 26 is fitted to a steering shaft 27. This air cleaner case 26 is formed long along the axial direction of the steering shaft 27, and has an air intake port 28 at the top. On the other hand, a water reservoir 29 and a drain 30 are provided at the bottom.

An intake pipe 32 of a carburetor 31 is connected to the abdomen of the air cleaner case 26, and the air supplied into the air cleaner case 26 from the air intake port 28 is passed through the filter 33, the intake pipe 32, and the carburetor 31. Exhaust gas generated by the engine 22 is discharged to the rear of the vehicle body through an exhaust pipe 34.

The water that has entered the air cleaner case 26 along with the air is temporarily stored in the water reservoir 29 and then discharged to the outside via the drain 30.

On the other hand, the engine 22 has a crankshaft 22A.
The cylinder 22B of the engine 22 is mounted in such a manner that it extends in the left-right direction with respect to the vehicle traveling direction (arrow B), and the crankshaft 22A is located on the front side of the vehicle body with respect to the step 25. , rear side of the vehicle body (right side in the figure)
It is set at an angle.

Further, a transmission 40 is interposed between the engine 22 and the front wheels 21F, and each transmission shaft 41, 42, 43 is connected to the crankshaft 22A. The crankshaft 22A is parallel to the crankshaft 22A, and is located on the front side of the vehicle body with respect to the crankshaft 22A.

As a result, the transmission 40
Most of the transmission case 40' of the transmission 40 is within the outer diameter range of the front wheel 21F in the region on the side of the center of the vehicle with respect to the front wheel 21F, that is, as is clear from the figure, when the front wheel 21F is viewed from the side. is located in a range hidden in the shadow of the front wheel 21F.

In the straddle type four-wheel vehicle 21, the output from the engine 22 is transmitted to the front wheels 21F via the transmission 40 described above, and the output is transmitted to the front wheels 21F via the drive shaft 45 extending from the transmission 40 toward the rear of the vehicle body. As a result, the front wheels 21F and rear wheels 21R are driven together to drive the vehicle.

[Effect of idea]

As detailed above, in the straddle-type four-wheel vehicle related to the present invention, the heavy transmission is located near the front wheels, so when the vehicle is traveling, the weight of the operator is on the seat. Even when the weight is applied to the rear, in other words, to the rear of the vehicle body, the balance of weight distribution between the front wheels and the rear wheels is prevented from being significantly disrupted, making it possible to obtain appropriate driving force.

[Brief explanation of the drawing]

FIG. 1 is an overall side view conceptually showing a straddle-type four-wheel vehicle related to the present invention, and FIG. 2 is an overall side view conceptually showing a conventional straddle-type four-wheel vehicle. 20...Saddle-type four-wheel vehicle, 21F...Front wheel, 2
1R...Rear wheel, 22...Engine, 22A...
Crankshaft, 22B...Cylinder, 23...Seat, 24...Bar handle, 25...Step,
40...transmission, 40'...mission case, 41, 42, 43...mission shaft.

Claims (1)

[Claims for Utility Model Registration] The invention has left and right front wheels and left and right rear wheels, an engine and a transmission are disposed between the front wheels and the rear wheels, and an area above the engine and the transmission. A straddle-type four-wheeled vehicle comprising a vertically long seat on which an operator sits to steer the vehicle using a bar handle, and further steps arranged on the left and right sides of the vehicle body between the front wheels and the rear wheels, The cylinder of the engine is inclined toward the rear of the vehicle body, and the crankshaft of the engine is arranged on the front side of the vehicle body with respect to the step in such a manner that it extends in the left-right direction with respect to the vehicle traveling direction. axis,
The transmission is disposed on the front side of the vehicle body with respect to the crankshaft in a manner parallel to the crankshaft, and the transmission is located within an outer diameter range of the front wheel in a region toward the center of the vehicle body with respect to the front wheel. A straddle-type four-wheeled vehicle.