JPS604866Y2 - tricycle - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a tricycle suitable for traveling on rough terrain.

More specifically, the rear of the engine supported at the bottom of the frame is opened, a carburetor is placed behind the engine, an air cleaner connected to the carburetor is placed on the rear side of the engine, and it is installed at the rear of the exhaust pipe. The present invention relates to a tricycle in which a muffler is provided on the rear side of the engine, opposite to the air cleaner, to improve cooling performance of the engine and to insulate the muffler.

A tricycle equipped with balloon tires for traveling on rough terrain has been proposed and put into practical use, but the tire width of this type of tricycle is wider than normal tires, so the front wheel is equipped with an engine located behind it. If an air-cooled engine is used, it is difficult to introduce cooling air for the engine.

In addition to this, a large volume air cleaner is installed immediately after the engine, which obstructs the intake of cooling air from the rear of the engine. This is not desirable for cooling the engine.

The inventors of the present invention have devised this invention in order to solve this problem in view of the problems of this type of tricycle. To provide a tricycle which improves the cooling performance of the engine, rationally arranges the air cleaner and muffler, and improves space utilization by opening up the space and arranging the air cleaner and muffler on both sides behind the engine.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic plan view of the frame of the tricycle, FIG. 2 is a specific plan view of the tricycle, FIG. 3 is a side view thereof, and FIG. 4 is a front view thereof.

The frame 1 includes a herad tube 2, a backbone-shaped main frame member 3 extending behind the head tube 2, two down tubes 4, 4, and members arranged from the lower rear of the head tube 2 to the rear and upper rear. 3 and a cross member 5 joining the rear ends of the down tubes 4, 4.

Two swing arm-shaped rear forks 6 are connected rearward from the L-shaped rear part of the down tubes 4, 4 via a bracket 6a.
．． A bearing member 6c is horizontally mounted between the rear ends of the rear fork 6, and a single rear cushion unit 7 is interposed between the bearing member 6c and the cross member 5 to connect them. , forming a shock suspension system for the rear wheels.

A rear axle 8 is laterally supported by the bearing member 6c, and rear wheels 9, 9 are supported at both ends of the axle 8.

On the other hand, the head tube 2 has upper and lower bridges 10.11
The upper and lower bridges 10.11 support the left and right upper members 13a, 13a of the front fork 13 that buffers and suspends the front wheel 12, and since the front wheel 12 is composed of a balloon tire, the frame 1 This will block the front of the area.

An engine 14 is mounted on the down tubes 4, 4 of the frame 1 between the lower parts of the main frame member 3, and a mission case 15 is disposed below the engine.
The sprocket 8a shown in FIG. 2 provided on the axle 8 is connected to the sprocket 8a shown in FIG.

A fuel tank 18 is disposed at the upper front part of the main frame member 3 on the engine 14, and a seat 19 is disposed behind this. A steering wheel 21 is provided, a handle 22 is provided at the upper end of the front fork 13, and a headlight 23 is provided in front of the handle 22.

In addition, 8b in Fig. 2 indicates the brake disc provided on the wheel 8.
Further, 8C indicates a brake caliper.

In the above, the rear of the engine 14 is open, and only the small-volume carburetor 24 is disposed behind the engine 14,
Only a thin rear cushion unit 7 is provided at the far rear.

The air cleaner 25 is connected to one rear wheel 9-1 behind the engine.
The air cleaner 25 is connected to the carburetor 24 at the rear of the engine via a connecting pipe 26.

On the other hand, the exhaust pipe 27 is guided from the front of the engine 14 to the rear through the side thereof, and the muffler 28 provided at the rear is arranged on the rear side inside the other rear wheel 9-2 behind the engine. .

Next, to explain its function and effect, the engine 14 is opened wide only by the presence of the carburetor 24 at the rear, and even if the front is blocked by a balloon tire, it is communicated with the space between the two rear wheels, thus creating negative pressure. As a result, air is drawn in around the engine, effectively cooling the engine.

In addition, the muffler is not placed close to the engine, and is placed on the rear side, making it possible to secure an open space and prevent thermal effects on the engine and air cleaner.
The large-capacity air cleaner and muffler are arranged on the left and right sides of the rear wheels of the two wheels on the rear side of the engine, which is advantageous in terms of space utilization, and has many advantages such as making it easy to secure space. You can get .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a schematic plan view of the frame structure, Fig. 2 is a plan cross-sectional view of the main parts of the tricycle,
FIG. 3 is a side view of the same, and FIG. 4 is a front view of the same. In the drawing, 14 is an engine, 24 is a carburetor, 25 is an air cleaner, 28 is a muffler, 12 is a front wheel, and 9 is a rear wheel.

Claims (1)

[Scope of utility model registration request] In tricycles with one front wheel and two rear wheels, a carburetor is placed behind the engine supported by the frame, an air cleaner connected to the carburetor is placed inside one of the rear wheels behind the engine, and a muffler is installed behind the engine. A tricycle characterized by having an engine disposed inside the other rear wheel on the rear side so that the rear side of the engine is open.