JPH054277B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a saddle-riding buggy vehicle, and particularly to an arrangement structure for an air cleaner and a muffler.

In recent years, saddle buggy vehicles have become popular as leisure and utility vehicles. This vehicle has three or four wheels, with one or two wheels in the front and two wheels in the rear.
It also has a lightweight and simplified structure that allows it to run on all terrain. In other words, although the buggy is a three- or four-wheeled vehicle, the structure is lighter and simpler with a motorcycle-type pipe frame, bar handle, and saddle-type seat, and the tires are balloon tires and the rear axle is a single wheel without a differential. This axle is designed to be suitable for driving on rough terrain, and the driver enjoys maneuvering by moving the center of gravity of the driver's body when turning the vehicle or overcoming obstacles.

In order to simplify the conventional frame structure of such buggies, a main frame consisting of two round pipes was first passed through the main frame along the longitudinal central axis of the vehicle.
A structure is adopted in which a frame skeleton is assembled using this main frame as the main bone. Here, the air cleaner is arranged in the center of the two main frames, and the muffler is arranged on either the left or right side of the main frame, but in the case of a buggy with two rear wheels, the air cleaner and muffler are arranged in the center because the inner width of the left and right rear wheels is narrow. are close to each other, and the air cleaner is easily affected by the heat of the heated muffler.
Furthermore, a round pipe without a flat surface requires brackets to attach other parts, which is difficult to do easily.

In view of the above circumstances, the present invention aims to simplify and rationalize the structure of a buggy as much as possible, and provides a saddle type buggy having two left and right rear wheels and equipped with an air cleaner and a muffler. The air cleaner and the muffler are respectively disposed on the left and right sides of the main frame, and the main frame is provided with a duct inlet and an outlet of the air cleaner. By forming a duct and connecting the duct outlet to the air intake of the air cleaner, the heat of the muffler is blocked by the main frame so that it is not transmitted to the air cleaner. The main frame can be used as an air cleaner duct.

The present invention will be described below with reference to an illustrated embodiment. Figures 1A to 1D show the general appearance of a four-wheeled saddle type buggy vehicle according to the present invention. 1 and 1' have a slightly smaller diameter and left and right wheel spacing than those of the rear wheels 2 and 2' to improve cornering performance, and are connected to a bar handle 3 similar to a motorcycle with a turning angle of approximately 1:1. ing. The vehicle body frame 4 is made of a pipe frame, which will be described later.A saddle-type seat 5 similar to that of a motorcycle is attached to the upper rear of this frame, and a driver sitting astride the seat 5 steps on steps 6 and 6' on both sides of the lower part of the frame 4. By placing your feet on the driver and moving your body's center of gravity to the left, right, front, and back of the vehicle, you can drive as one with the driver and the vehicle. The rear axle 8 that drives the left and right rear wheels 2, 2', which are drivingly connected to the engine 7 mounted approximately in the center of the vehicle body frame 4 in the longitudinal direction, is a single axle without a differential, and is The differential between the left and right rear wheels is absorbed by the flexibility of the balloon tires, simplifying the structure and preventing the vehicle from skidding due to the difference in ground resistance between the left and right rear wheels on soft ground, and from slipping on one drive wheel on soft ground. I am trying to help people who are unable to escape.

FIGS. 2 and 3 show details of the frame structure, and the vehicle body frame 4 is aligned with the longitudinal central axis A-
A linear main frame 11 made of a rectangular pipe arranged along line A and slightly tilted backwards, and downward parts 12a and 12a' that hang slightly forward from the front part of this main frame 11. , the downward section 12
horizontal portions 12b and 12b' that are curved from a and 12a' and extend substantially horizontally toward the rear of the vehicle;
Main frame 1 curves upward from b, 12b'
The main frame is formed by a pair of down pipes 12 and 12', which are a pair of left and right round pipes each having an upwardly facing portion 12c and 12c' joined to the rear part of the down pipe. In other words, the main frame 11 that does not require complicated bending is
A square pipe whose degree of freedom in the bending direction is limited to the bending direction with the transverse line of each circumferential side as the bending line, but it has a flat surface that makes it easy to attach parts, and the width and height ratio can be set freely as necessary. On the other hand, down pipes 12,1 that require complicated three-dimensional bending
2' is a round pipe.

The vehicle body frame 4, which is composed of the main frame 11 made of square pipes, the down pipes 12, 12' made of round pipes, etc., can be made lightweight by using an aluminum alloy material. Left and right front axle holders 1 are fixed to the front curved portions of the down pipes 12, 12' via brackets 13.
4 and 14' are penetrated by the nutkuru pipe 15,
Front wheels 1, 1' are supported at both ends of the vehicle so as to be freely turnable. Left and right rear axle holders 17, 17' fixed to the rear curved portions of the down pipes 12, 12' via brackets 16 support a single-shaft rear axle 8.

A head pipe 19 that passes through the steering shaft 18 is welded to the tip of the main frame 11. The handlebar 3 is attached to the upper end of the steering shaft 18, and the lower end is connected to a tie rod 21 via a lever 20. By rotating the left and right front wheels 1, 1' connected to the tie rod 21, the left and right front wheels 1, 1' are turned at a turning angle of approximately 1:1.

The joint between the main frame 11 and the down pipes 12, 12' at the front of the vehicle body frame 4 is
It is reinforced with two left and right gusset plates 22, 22' welded to the left and right side surfaces of the main frame 11 and the left and right down pipes 12, 12', respectively, and the horizontal parts 12b, 1 of the left and right down pipes 12, 12' are reinforced.
A cross pipe 23 is installed on 2b', and the above two gazette plates 22, 22' and the cross pipe 2
Two brackets 24 welded to the center of 3,
A front gusset pipe 25 serving as a tension member is removably fixed at both ends with bolts 26 and 27 between the front gusset 24' and the front gusset 24'. This front gusset pipe 25 has a down pipe 12 curved at an acute angle,
12' front downward parts 12a, 12a' and horizontal part 12
Together with sides b and 12b', it forms a substantially equilateral triangle, reinforcing the strength of the vehicle body frame 4 in the vertical direction. At the rear of the body frame 4, there is a down pipe 12' on one side.
The upper part of the upward part 12c' and the down pipe 1 on the other side
A diagonal rear gusset pipe 28 is installed to connect the two horizontal portions 12b at appropriate positions, thereby reinforcing the rigidity of the vehicle body frame 4 in the vertical direction and against torsion. Also, near the rear of the vehicle body frame 4, there is a main frame 11 and horizontal parts 12 of the left and right down pipes.
A bracket 29 having a U-shaped cross section and also serving as a stay is attached to connect the upper and lower portions b and 12b'. Upward portions 12c, 12 of down pipes 12, 12'
There is a seat mount pipe 3 in the width direction at the upper end of c′.
0 is fixed, and a rear fender 31 with a seat 5 mounted thereon is attached with a hinge 32, and the seat 5
is adapted to be lifted rearward together with the rear fender 31.

The down pipes 12, 12' are horizontal parts 12b, 1
2b' is divided into two parts approximately at the center, a forged joint member 33 is inserted into the divided part, and the joint part is finally welded to form the inside of the frame by bending the down pipe and welding various parts to it. Avoids residual stress. The coupling member 33 includes a step 6,
6' mounting bracket 32a is integrally molded.

The engine 7 is mounted approximately in the center of the vehicle body frame 4 in the longitudinal direction, and is arranged approximately horizontally with the cylinder head 7a facing forward.
The cylinder head 7 of the engine 7 is attached to the brackets 34 and 35 welded to the main frame 11, respectively.
The upper parts of the transmission case 7a and the transmission case 7b are suspended on the bracket 29, and the rear part of the transmission case 7b is suspended on the bracket 29, respectively. A chain 38 is attached to the sprocket 36 attached to the output shaft of the transmission and the sprocket 37 attached to the rear axle 8 on the left side of the vehicle body.
is wound, and the rotation of the engine 7 is transmitted to the rear wheels 2, 2'.

The intake pipe 51 of the engine 7 is connected to the downstream side of the carburetor 52, and the air cleaner 5 is connected to the upstream side of the carburetor 52 via a connecting tube 53 made of an elastic material with a reinforced outer surface and ribs (not shown).
4 to form an intake system, which is disposed on the left side of the vehicle body frame 4. The air cleaner 54 has vertical brackets 54b and 54c formed at the front and rear of the outer wall, and the front bracket 54b is attached to the main frame 1.
1 and the horizontal parts 12b and 12b' of the down pipe, and the rear bracket 54c is welded to the bracket 56 welded to the upper part of the upward part 12c of the left down pipe. They are joined together and placed in parallel with the main pipe 11 with an appropriate spacing therebetween. Here, the air intake duct of the air cleaner 54 is connected to the main frame 1.
1, and its details are shown in FIG.
That is, the opening at the front end of the main frame 11 is closed by a cap 11a, and a plurality of duct inlets 57 are bored in the lower part of the circumferential surface of the main frame 11 immediately after the head pipe 19 to prevent foreign matter from entering below. A tunnel cover 58 having a U-shaped cross section is provided. This tunnel cover 58 is closed off at the front by a head pipe 19. A duct outlet 59 is opened in the rear left peripheral surface of the main frame 11, and an annular flange 60 fixed around the duct outlet 59 connects the duct outlet 59 and the air intake port 54d of the air cleaner 54 in an airtight manner.

The exhaust system of the engine 7 is arranged on the right side of the vehicle body frame 4, and the muffler 62 connected to the rear end of the exhaust pipe 61 has one bracket 62a at the front, two brackets 62a at the rear,
It is connected to the brackets 29 and 63 on the vehicle body side by 62b and 62c, and is arranged in parallel with the main frame 11 with an appropriate distance therebetween.

In addition, the reference numeral 39 in the figure indicates a battery mounted on the center axis of the vehicle at the rear of the vehicle, and the reference numerals 40 and 41
are front carry and rear carry, code 42
is the front fender.

In the above configuration, the main frame 11 of the vehicle body frame 4 is constructed of a single square pipe along the front-rear central axis A-A of the vehicle, which makes it easy to attach other parts to the main frame, and the width and height are The feature of the square pipe allows the ratio to be set freely as necessary, increasing the degree of freedom in design. Also, by using the main frame 11 as an air intake duct for the air cleaner 54, it is possible to reduce the intrusion of foreign matter into the intake air. The configuration is simplified. Furthermore, the air cleaner 54 and muffler 62, which are arranged in parallel between the narrow inner widths of the left and right rear wheels 2 and 2', are mounted on a single main frame 1.
By arranging it with an appropriate space on both sides of 1,
This makes it difficult for the heat of the muffler 62 to be transmitted to the air cleaner 54.

As explained above, according to the present invention, in a saddle-riding buggy vehicle having two left and right rear wheels and equipped with an air cleaner and a muffler, the main frame of the vehicle is connected to a single shaft along the longitudinal central axis of the vehicle. The air cleaner and the muffler are respectively arranged on the left and right sides of the main frame, and the main frame is formed with a duct inlet and a duct outlet, and the duct outlet is connected to the air of the air cleaner. By connecting to the intake port and using the inside of the main frame as an air intake duct to the air cleaner, it is easy to attach other parts to the flat main frame, and the width and height ratio of the main frame can be set arbitrarily. The degree of freedom in design is increased, and there is no need to provide a separate air cleaner duct, simplifying the overall frame structure. Furthermore, the heat of the muffler is blocked by the main frame, and it is possible to prevent the heated muffler from being affected by heat on the air cleaner without providing a heat shield or a large heat shield.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1A to 1D are a side view, a top view, a front view, and a rear view showing the schematic appearance of a four-wheel saddle type buggy, and FIG. 2 is a frame. FIG. 3 is a top view of the structure; FIG. 4 is a front top view of the air intake duct of an air cleaner using the main frame; FIG. It is a side view of the same main part. 2, 2'...Rear wheel, 4...Vehicle frame, 11
...Main frame, 12,12'...Down pipe, 54...Air cleaner, 54d...Air intake, 62...Muffler.

Claims (1)

[Claims] 1. In a saddle type buggy vehicle having two left and right rear wheels, and equipped with an air cleaner and a muffler, the main frame of the vehicle is composed of a single pipe with a rectangular cross section along the longitudinal central axis of the vehicle, and the air cleaner and a muffler are respectively disposed on the left and right sides of the main frame, a duct inlet and a duct outlet of the air cleaner are formed in the main frame, and the duct outlet is connected to the air intake of the air cleaner. Saddle type buggy vehicle.