JPS6060083A - Car-body frame structure of saddling bogie car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a body frame structure for a saddle buggy vehicle that is lightweight and has improved rigidity.

In recent years, saddle buggy vehicles have been gaining popularity as both leisure and practical vehicles. This vehicle has a two-wheel or four-wheel configuration with one or two front wheels and two rear wheels, which is more stable than a normal two-wheeled vehicle, and has a lightweight and simple structure that allows it to run on all terrain. In other words, although the buggy is a two-wheeled or four-wheeled vehicle, the structure is lighter and simpler with a motorcycle-type pipe frame, bar handle, and saddle 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 user enjoys maneuvering techniques such as shifting the center of gravity of the body to the tricycle when turning the vehicle or overcoming obstacles.

Conventionally, in order to simplify the frame structure of such buggy vehicles, there are buggy vehicles in which a single main frame is first passed along the front-rear central axis of the vehicle, and a frame skeleton is assembled using this main frame as the main pipe. Here, in a rigid type saddle buggy vehicle in which the rear axles of the left and right wheels are suspended on the body frame without a spring, it is necessary to take measures against twisting of the rear part of the body frame. Conventionally, as a countermeasure to this problem, reinforcing members were inserted into the rear of the vehicle body frame, one on each side.
ing. .

The present invention aims to simplify and reduce the weight of the vehicle body frame structure without reducing the rigidity of the vehicle body frame. It has a body frame consisting of a left and right town pipe which extends almost horizontally to the rear of the vehicle body after hanging from the main frame, and a town pipe consisting of a left and right IJ round pipe that extends upward at the rear of the vehicle body and joins to the rear of the main frame. In the body frame structure of a buggy that rides in the saddle, a diagonal cassette pipe is installed to connect the upper end of the upward part of the rear of the down pipe on the negative side and an appropriate position of the horizontal part of the down pipe on the other side. .

The present invention will be described below with reference to an illustrated embodiment.

FIG. 1 (△)-N)) shows a schematic external appearance of a four-wheel type saddle-riding buggy vehicle according to the present invention]-25 Front axle with two left and right wheels 1. Bi and rear @2, 2' use low pressure balloon tires. Bi is the diameter and left and right wheel spacing of rear axle 2, 2'
It is made slightly smaller than that of the bar bundle 3 to improve cornering performance, and is connected to a bar bundle 3 similar to a motorcycle with a turning angle of approximately 1/1. For those with two front axles,
The body frame 4, which connects the bar handle to the balloon tire holder in the same manner as in four-wheeled bicycles and four-wheeled passenger cars, is made of a pipe frame, which will be described later, and the upper rear side of this frame is similar to that in two-axle vehicles. The saddle-riding seat (~5) was removed and the seat 51;
By placing your feet on the steps 6 and 6' on both sides of the lower part of the vehicle, you can move your body's center of gravity to the left, right, front, and back of the vehicle, allowing you to drive the vehicle as one. body frame 4
The longitudinal direction of the is approximately the center F; the rear axle 8 is drivingly connected to the mounted engine 7 and drives the left and right rear @2, 2'.
has a single axle with no differential gear.

Figures 2 and 4 show details of the frame structure, and the vehicle body frame 4 is a single straight rectangular pipe arranged at a slight rearward tilt of 70 degrees with respect to the front-rear central axis A-A of the vehicle. A main frame 11 and downward parts 12a and 12a' that hang down slightly forward from the front part of the main frame 11.
and the lower surface portion 12a.

Horizontal portions 12b, 12b' that are curved from 12a' and extend substantially horizontally toward the rear of the vehicle body, and the horizontal portion 12b.

A town pipe 12112' consisting of a round pipe of left and right -tJ with upper parts 12c and 12c' curved above 12b' and joined to the rear part of the main frame 11.
This forms the main skeleton. In other words, the main frame 11 has 9 degrees of freedom in the bending direction, which is limited to the bending direction with the transverse line of each circumferential side as the bending line. and +l
A rectangular pipe is used whose height ratio can be freely set as required, while a round pipe is used for the down pipe 12 and 12', which require complicated three-dimensional bending.

The 17-piece frame ZS 4, which consists of main frames 1 and 11 made of rectangular pipes and town pipes 12 and 12' made of round pipes, can be made lighter by using aluminum 11 alloy material. . down pipe 12,
A knuckle pipe 15 passes through the left and right front axle holders 14°14' which are fixed to the front curved portion of the left and right axle holders 12' through brackets 1-13, and the front axle 1. He supports Bi freely.

Bragaso 1 on the rear curved part of the down pipe 12.12'
The left and right rear axle halters 17 are fixed to each other through 16.
17' supports a single rear axle 8.

A steering shirt 1 is attached to the tip of the main frame 11.
The spatula 1 to pipe 19 inserted through the steering shirt 1-18 are welded together, and the bundle bar 3 is attached to the upper end of the steering shirt 1-18 (the lower end is connected to the steering wheel 1-21 via the lever 20. By rotating the handle bar 3, the left and right front wheels connected to the tires 1 to 21 can be turned at a turning angle of approximately 1:1.

The joint between the front part of the main frame 11 of the vehicle body frame 4 and the town pipe 12.12' is the main frame 111.
Two left and right gasset notebooks welded to the left and right sides of 1 and the left and right town pipes 12゜12', respectively.22.22
Also, a cross pipe 23 is installed at the horizontal part 1:N), +2b' of the left and right town pipes 12.12', and the center of the above two cassette plays 1-22.22' and the cross pipe 23. The front gusset pipe 25 serving as a tension member is removably fixed by poles 26 and 27 between the two brackets 24 and 24' which are welded to each other. This front gusset pipe 2
5 is an acutely curved 4L town pipe 12. 12' front downward part ] 2 a,] 2 a' and horizontal part 12 b,
Together with the sides 12b', they form a substantially regular square, reinforcing the strength of the vehicle body frame 4 in the vertical direction. In addition, a bracket 2.9 having a U-shaped cross section and also serving as a stay is attached to the rear chamber of the main body frame 4 to vertically connect the main frame 11 and the horizontal portions 12b, 12b' of the left and right down pipes. Here, in the present invention, in the rear part of the vehicle body frame 4, a rear cassette connects two parts of the upward part 12c' of the town pipe 12' on the negative side and the horizontal part 121 of the down pipe 12 on the other side at appropriate positions. A pipe 28 is installed diagonally to strengthen the rear part of the vehicle body frame 4 in vertical direction and against twisting and twisting.

The upper end portions 12c, 12c' of the town pipe 12.12'
It is fixed and the sheet 5 is placed on it.
31 or hinge 32, and the seats 1-5 can be lifted rearward together with the hinge 31.

2, 12' on the town pipe, 2b, 12b' on the horizontal part
The frame is divided into two approximately at the center, and a pre-molded connecting member 33 is inserted into the divided portion, and the connecting portion is finally brought into contact with 8 to avoid residual internal stress in the frame. Step 6.6' Take] River Bracket h 32 a
is integrally molded to fit.

The engine 7 is mounted approximately at the center of the vehicle body frame 4 in the longitudinal direction, and is arranged approximately horizontally with the cylinder pad 7a facing forward. Rsa 4+ da brakeno l-
:) 4, zl'7a to the sill of the engine 7 and the upper part of the transmission case 7b to the 35, and the f throat 29
The rear part of the mission case 7t) is suspended in each case. On the left side of the car when looking at the car from the rear, the sprocket 1 attached to the output shaft of the transmission is 36 and rear tiI.
A chain 38 is wound around the sprockets 1 to 37 mounted on the I18, and the rotation of the engine 7 is transmitted to the rear shafts 2, 2'.

The intake system of the engine 7 is arranged on the left side of the in-frame It, and an intake pipe 51 is connected to the intake port (not shown) of the engine 7.
Connected through the carburetor 52゜A・Bretz 5
The main frame 11 is used for the intake tact of the air cleaner 54, which is connected to the main frame 11 via the connectin 9 tube 53.

An air intake port 54a of an air cleaner 54 is connected to the rear left side surface of the main frame 11, and an air intake port 54a is connected to the rear left side surface of the main frame 11.
The outside air is sucked into the air cleaner 54 through the inside of the main fly 1111.

The exhaust system of the engine 7 is arranged on the right side of the vehicle body frame 4, and is connected to the exhaust 0 (not shown) of the engine 7 [1
It consists of four trachea 61 and a muffler 62 connected to its rear end, and the muffler 62 and the air cleaner 5) 1 are arranged substantially symmetrically on both sides of the main frame 11.

The symbol '339 in the figure is on the center axis of the vehicle at the rear of the vehicle.
- Mounted batteries, numerals 40 and 41 are front carry and rear carry, numerals et, 1I 2 are front fenders.

In the above configuration, the upper end of the upper surface part 12c' of the rear part of the down pipe 12' on the negative side and the horizontal part of the town pipe on the other side]
2 diagonal rear cassette 1 to connect with appropriate position of h
By constructing the pipe 28, the rigidity of the rear part of the vehicle body frame in the vertical direction and torsion is strengthened by a single reinforcing material.

As explained above, according to the present invention, there is a main frame made of a single rectangular pipe along the front and rear center axis of the vehicle body,
After hanging down from the front part of the main frame 11, it extends almost horizontally to the rear of the vehicle body, and connects upwardly to the rear of the main frame at the rear of the vehicle. In the body frame structure of the saddle buggy + li, which has a body frame consisting of a slanted cassette pipe that connects the upper part of the rear of the town pipe on the negative side and an appropriate position on the horizontal part of the down pipe on the other side. By constructing this structure, the vertical and torsional rigidity of the rear part of the vehicle body frame is strengthened by simply using a single reinforcing section.
We can provide a saddle type buggy that is lightweight, simple, and highly rigid.

[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 schematically showing a four-wheeled saddle-riding buggy vehicle, and FIG. 3 is a side view of the frame structure, FIG. 3 is a top view of the same, and FIG. 4 is a rear view of the same. 4...Vehicle frame, Moon...Main frame, 12
．． 12'... down pipe, ], 2a, 12a'...
・Downward part. ]2b, 121)'...Horizontal part, 12c, 12c'
-Upper section, 28...rear power cellar 1~pipe. , Applicant Book I11 Giken Kogyo Co., Ltd. Agent Patent Attorney Toshihiko Watanabe Figure 1 (B), 51 (D)

Claims (1)

[Scope of Claims] 1. A main frame consisting of seven rectangular pipes extending along the front-rear center axis of the vehicle body, and extending substantially horizontally toward the rear of the vehicle body after hanging from the front part of the main frame. In the body frame structure of a saddle buggy vehicle, the vehicle body frame structure includes a down pipe made of a pair of right and left round pipes that are connected upwardly to the rear part of the main frame at the rear of the vehicle body. A body frame structure for a saddle buggy vehicle, characterized in that a diagonal cassette pipe is constructed to connect the upper end of the upper surface part of the down pipe to an appropriate position of the horizontal part of the down pipe on the other side.