JPS60244683A - Car for travelling on wasteland - 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 (Field of Industrial Application) The present invention relates to a rough terrain vehicle with two driving rear wheels with one wide ultra-low pressure tire and at least one steering front wheel. .

(Conventional Technique i) A 3 or 4-wheel rough terrain vehicle equipped with wide ultra-low pressure tires (so-called balloon tires) is used, and a straddle-type seat is placed in front of the vehicle from above between the pair of left and right driving rear wheels. In this type of vehicle, the vehicle body tends to tilt significantly left and right when driving on rough terrain or when turning.

In conventional vehicles of this type, the straddle-type seat was placed on one side of the rear fender. As a result, the center of gravity becomes higher, making the vehicle body more likely to tilt to the left or right, and there is also a problem in that the driver's body is not easily held and the driving posture is likely to become unstable.

(Object of the Invention) The present invention was made in view of the above circumstances, and by lowering the center of gravity, it is possible to reduce the left and right rocking of the vehicle body.
It is also an object of the present invention to provide a vehicle for running on rough terrain that has excellent body boldness and allows the driver to drive in a stable posture.

(Structure of the Invention) To achieve this object, the present invention provides a pair of left and right driving rear wheels with wide ultra-low pressure tires and at least one steering front wheel, and a pair of left and right driving wheels that cover at least above each of the rear wheels. A vehicle for running on rough terrain, comprising: a rear fender having integrally formed cover portions; and a straddle-type silt extending forward from between the left and right cover portions.

The rear part of the straddle-type seat is configured to be located below the upper edges of the respective parts.

(Example) The present invention will be described in detail below based on the drawings.

Figure 1 is a side view of an embodiment of the present invention, Figure 2 is a plan view,
Figure 3 is a cross-sectional view of the river-1 ■ section 7 in Figure 1, section 4.5.
Figure 6 is a fliII plane view, a plan view, and a front view for showing the ψ-body structure.

In Fig. 4.5.6, numeral 10 is a frame.

A pair of left and right upper tubes bent into an arched shape], 2 (1,
2a.

12b), and a pair of left and right lower tubes 14 (14a, 14b) connecting the front and rear ends of the upper tube 12.

+-,・Front tube 16 and rear tube J8 connecting the lower tubes 12 and 14, and a pair of left and right silt rails 20 (2 oa, z
ob), the rear end of the -1 tube 12 and the seat rail 2
0 and the rear tube 22 (22a.

22b) and cross tubes 24a, 24b.

24C (Fig. 5 valley) etc. In FIG. 4, 26 is the front bumper.

28 (28a, 28b) are a pair of left and right steering front wheels;
Each is equipped with wide, ultra-low pressure tires. These front wheels 28 include a lower arm 30 (3oa', 30b) and an upper arm 32 (32a).

32b) and Knack #34 (34a, 34b).

The frame 1 is supported by a double wishbone type suspension system consisting of a buffer unit 36 (36a, 3.6b).
It is attached to 0. A steering shaft 38 has a steering bar handle 40 fixed to its upper end, and a steering bracket 42 fixed to its lower end. Rotation of the bar handle 40 is transmitted from the steering bracket 42 to the knuckle 34 via tie rods 44 (44a, 44b), and the front wheels 28 are steered left and right.

46 (46a, 46b) are drive rear wheels, . . . The rear wheels 46 are equipped with wide ultra-low tires. At the rear ends of the upper and lower tubes 12 and 14 of the frame 10,
A rear arm 48 is pivotally supported to be able to swing up and down, and each rear wheel 46 is mounted on a rear wheel shaft 50 held at the swing end of the rear arm 48. In FIGS. 4 and 5, 52 is a buffer unit that supports the rear wheel 46. In FIGS. 3 and 5, 54 is a differential gear, 56 is a brake disc, and 58 is a brake caliper.

60 is a water-cooled engine, and a carburetor 62 and an intake air purifier 64 are disposed behind the cylinder 60a of the engine 60. An exhaust muffler 66 is disposed in front of the cylinder 60a. Note that the steering shaft 38 is disposed so as to pass through a through hole formed in the exhaust muffler 66. Exhaust gas from the engine 60 is led to an exhaust muffler 66 by an exhaust pipe 68, and further led to the rear of the vehicle body by an exhaust pipe 70.

A radiator 72 is disposed above the exhaust silencer 566 and cools the cooling water of the engine 60. Further, 74 is a fuel tank, which is disposed at the rear and lower part of the intake air cleaner 64. The output of the engine 60 is provided through a universal joint (not shown).

A differential gear 54. Rear wheel axle 50& is transmitted.

76.78 are a pair of left and right footrests, and each footrest 76.78 is a pair of left and right footrests.
78 are two footrest rods 76a arranged in parallel in the front and rear,
76b, 78a, and 78b. The distance between the front and rear footrest bars 76a, 76b and 78a, 78b is set to % to 100% of the length of the driver's shoes, and is determined to improve the grip of the shoes.
In addition, the operability of pedals such as the brake pedal 80 is ensured. In this embodiment, the rear footrest bars 76b and 78b are replaced with the front footrest bar 7 as shown in FIG.
Since they are arranged a little higher than 6a and 78a, they come into good contact with the soles of the driver's shoes during one ride, further improving the grip of the shoes.

82 is a front fender located above and behind the front wheel 28.

It is made to cover above the radiator 72 and engine 60. The front fender 82 has an air inlet 82a in front of the radiator 72, and an air outlet 82b in the rear upper part and side of the radiator 72.

82c are formed respectively. For this reason, as shown by the point mark in FIG. 4, the running wind hits the radiator 72 from the air inlet 82a, and the running wind that has passed through the radiator 72 flows out from the air outlets 82b and 82C. Therefore, radiator 72
Improves cooling performance.

84 is a rear fender, and left and right rear wheels 46a.

Left and right cover parts 84 that cover from one side of 46b to the front
a and 84b are integrally formed to form a single covering portion 84a.

The front part of the central part connecting 84b is depressed downward.

There are 86 straddle type seats, and the rear fender is 84.
The front part is located at the front part of the central part of the front fender 82. As a result, the rear part of the seat 86 is located below the edges of each of the cover parts 84a and 84b (7).Therefore, when the driver (see imaginary lines in FIGS. 1 and 3) is seated deeply on the seat 86, Since the seat 86 is located low, the center of gravity of the entire vehicle body is also low, and the driver's buttocks drop between the left and right covers 84a and 84b as shown in FIG. The oscillation blooms, and the driver's buttocks become stable again.

(Effects of the Invention) As shown in I: below, the present invention lowers the space between the parts of the rear fender that cover the left and right rear wheels so that the rear part of the straddle type seat is lower than the edge of the cover part of the rear wheel. from.

The center of gravity of the vehicle is lowered while driving, and there is less left and right rocking while driving. Further, since the driver's body can be firmly held between the left and right cover parts, the driving posture is stable and rough terrain driving performance is improved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a sectional view taken along the JIT-11T line in FIG.
Figures 4.5.6 are a side view, a top view, and a +1:, Hrii diagram showing the vehicle body structure. 28. Steering front wheel, 46. Drive rear wheel. 84・Rear fender, 84a, 84b...cover part. 86... Straddle type seat. Patent Applicant: Yamaha Motor Co., Ltd. Agent, Patent Attorney Yama 1) Written by Yu, Figure 6, 4θ, Letter of Continuation of Amendment, Seal, June 14, 1980, 1. Commissioner of the Japan Patent Office, Mr. Kazuo Wakasugi ■, Minor Case Indication, 1988 Patent Application No. 100398 2 Name of the invention Vehicle for traveling on rough terrain 3 Relationship with the case of the person making the amendment Patent issue Horseman Address 412500 Shin, Iwata City, Shizuoka Prefecture Name (A)
O7) Representative of Yamaha Motor Co., Ltd. r:r-Ij
Hideto 4, Agent Address: 1-6-21-6 Nishi-Shinbashi, Minato-ku, Tokyo Number of inventions increased by amendment: 0 7, Description and drawings subject to amendment

Claims (1)

[Scope of Claims] A pair of left and right driving rear wheels and at least one steering front wheel with wide ultra-low pressure tires, and a pair of left and right covering portions that cover at least the upper portions of each of the rear wheels are integrally formed. rear fender and
A vehicle G for traveling on rough terrain is provided with a straddle-type seat extending forward from between the left and right cover portions. A vehicle for driving on rough terrain, wherein a rear portion of the straddle-type seat is located below an upper edge of each of the cover portions.