JPS59176165A - Small four-wheeled car - Google Patents

Abstract

PURPOSE:To simplify the structure of small four-wheeled car and to facilitate manufacture by forming both side faces of chassis frame with side frame made of a pair of looped metal tubes while coupling both side frames with a cross member including a bottom plate and a front face plate for forming the floor. CONSTITUTION:Both side faces of chassis frame are formed with a pair of looped metal tubes 1A, 1A which are coupled through cross members 17, 17, front bumper 8, rear bumper 9, bottom plate 19 for forming the floor, roof, etc. Consequently the structure of chassis frame is simplified while manufacture is simplified because main parts are formed by bending a tubular member.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a small and lightweight four-wheeled vehicle driven by an engine, for example, for a passenger, which is easy to get on and off, and allows for a flexible body structure. The purpose of the present invention is to provide an inexpensive vehicle that has a simple and lightweight structure.

[Prior art]

Various types of small one-seater four-wheeled vehicles have been seen in the past (for example, Japanese Utility Model Application Publication No. 57-85364), but the body structure is made of steel plates or synthetic resin like large vehicles, and
At the same time, the attempt was made to downsize the vehicle, so the entrance on the side of the vehicle became smaller, making it inconvenient to get on and off the vehicle, and the weight of the vehicle increased, making it difficult to reduce manufacturing costs.

[Summary of the invention]

This invention aims to solve the above-mentioned problems,
It is characterized by the fact that both sides of the vehicle body frame are constructed of side frames made of a pair of loop-shaped metal tubes, and the two side frames are connected by a cross member that includes a bottom plate and a front plate that make up the floor.

〔Example〕

Hereinafter, the present invention will be explained with reference to the illustrated embodiment. Reference numeral 1 is a vehicle body frame, and a front wheel 2 is supported on the front side of the frame, and a rear wheel 3 is supported on the rear side thereof. That is, the front wheel 2 is pivotally connected to the front end of the vehicle body frame 1 and supported by a leading arm 5 provided to be able to swing up and down by a spring 4, and the rear wheel 3 is pivotally connected to the rear end of the vehicle body frame 1. It is supported by a drive unit γ which is provided to be vertically swingable by a spring 6. 2a is the front axle, 5 & is the axis of the leading arm 5, 7
8 is the axis of the drive unit) 7. 8 is a front bumper, 9 is a rear member, 10 is a headlight, and 11 is a direction indicator light. In this embodiment, the front wheels 2 and the rear wheels 3 protrude rearward Ar1 from the front end or the rear end of the vehicle body frame 1, and are intended to serve as members.

12 is a passenger seat installed inside the vehicle body frame 1; 14;
15 is a pillow placed behind the passenger's head to prevent whiplash, and 15 is a steering wheel. A simple barrier such as a wall chain or string may be provided on the side of the driver without a door.

The vehicle body frame 1 is formed by connecting a pair of left and right side frames '+a, 1a by cross members 17, 17 made of steel pipes. In particular, the front cross member (17) is shorter than the rear cross member, narrow at the front, and connected in a wide wedge shape at the rear, and the roof is narrower than the bottom. This makes it easier to see the occupant's feet above the ground, and also prevents the head from reaching the roof, making it easier to get in and out of the vehicle if the height of the vehicle seat is low. This solves the difficulty of getting on and off the vehicle, making it extremely easy for passengers to get on and off, and the front projected area force is made as small as possible. The width of the cross member i7a at the rear of the vehicle body frame 1 is bent upward in the shape of a chevron at the center thereof, and the pillow 14 for preventing whiplash is installed on the central portion of the cross member i7a.

The side frame 1a is formed by bending a steel pipe into a substantially pentagonal I-ripe shape. The top part IA is arranged horizontally, and the relatively short rear window frame part IB extends downward from the top part 1A.

Extremely short floor frame IEV and front window frame that extends horizontally forward from `` C and short floor frame IE,! : Consists of a modified version of the footrest frame 1F that connects the. In addition, the left and right side frames 1a
, 1a are bolted to the front end portion 8 and the rear member 9, which also serve as a cross member 1T and contribute to improving the rigidity of the vehicle body frame 1. In FIG. 4, 1b ,1
c are brackets for mounting the front 8 and rear members 9, respectively. A roof plate 18 is installed at the top between the left and right side frames 1a, Ia, a bottom plate 19 is installed over the seat frame ID, floor frame 1E and footrest frame 1F, and a front glass is installed on the front window frame 1C. Includes front plate for installation. These are made of steel plates and are connected by welding as shown in FIG. 5, contributing to increasing the rigidity of the vehicle body frame 1. The roof plate 18 is sometimes made of synthetic resin to reduce the weight of the vehicle body. There is no window glass in the rear window frame 1B, which is related to the fact that there is no side door on the side of the vehicle, which stabilizes the flow of wind generated by the vehicle inside the driver's seat. It is possible to prevent wind from flowing in an unexpected direction in the driver's seat, and to reduce running resistance caused by the wind.

The drive unit 7 is comprised of an internal combustion engine and a chain or other transmission means that connects the internal combustion engine to the rear wheels 3, and is disposed at the lower rear of the seat frame 1D facing diagonally downward and forward. By making the drive unit 7 vertically swingable, the rear wheel suspension space can be saved, which is useful for downsizing the vehicle. 21 is a cover that covers the top and side surfaces of the drive unit 7; 22 is a rear member; and 9 is a tail light.

〔Effect of the invention'〕

As described above, this small four-wheel vehicle consists of side frames made of a pair of loop-shaped metal tubes on both sides of the body frame, and the two sides are connected by a cross member including the bottom plate and front plate that make up the floor. However, since the front wheels are arranged at the front lower part of the body frame and the rear wheels are arranged at the rear lower part, the structure of the body frame is simplified, the design is easy, and overall productivity can be increased. In addition, the entrance can be opened wide on the side of the vehicle body frame, making it easy to get on and off the vehicle.Also, since the main components are formed by bending steel pipes and other metal pipes, they can be formed by compression molding of steel plates. It is easy to manufacture as it does not require a large machine such as a press machine.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side view of a small four-wheeled vehicle, FIG. 2 is a front view thereof, and FIG. 3 is a rear view thereof. FIG. 4 is an exploded view of the main parts showing the structure of the vehicle body frame, and FIG. 5 is a cross-sectional view taken along the line -■. DESCRIPTION OF SYMBOLS 1...Vehicle frame, 1a...Side frame, 2...Front wheel, 3...Rear wheel, 7...Drive unit, 8...
-・Taimae member, 9・−・−back member, 17−・−worker loss member, 18...,. Roof plate, 19...bottom plate. Watch applicant Yamaha Motor Co., Ltd. agent Masaki Yamakawa (and others) Figure 1 8 Figure 2 8 Figure 3 18 Figure 4 5 Figure 9

Claims (7)

[Claims] (1) Both sides of the vehicle body frame are constructed of side frames made of a pair of loop-shaped metal tubes, and the two side frames are connected by a cross member including the bottom plate and front plate that constitute the floor. A four-wheeled car with a front wheel and a rear wheel located at the bottom of the rear. (2) The small four-wheeled vehicle according to claim 1, wherein the side frame is formed by winding a single steel pipe into a loop shape and connecting the ends thereof by welding or other means. (3) The small four-wheeled vehicle according to claim 1, wherein the cross member includes a wave leakage bumper. (4) The small four-wheeled vehicle according to claim 1, wherein the rear wheels are supported by the body frame via a drive unit (f) including an engine. (5) The small four-wheeled vehicle according to claim 1, wherein the rear wheels are pivotally supported on the body frame and supported by the body frame via a drive unit provided so as to be swingable up and down by a spring. (6) The small four-wheeled vehicle according to claim 1, wherein the cross member includes a bellow support rod for protecting driving A. (7) The small four-wheeled vehicle according to claim 1, wherein the left and right side frames are arranged in a wedge shape, narrow at the front side and wide at the rear side.