JPS62143780A - Saddling type four-wheel car for travelling on uneven ground - 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 a. Field of Industrial Application The present invention relates to a straddle-type four-wheeled vehicle suitable for traveling on rough terrain and capable of effectively utilizing dead space.

b. Prior Art Vehicles used for traveling on rough terrain are required to be easily balanced and have good maneuverability when the vehicle is driven by a driver. Therefore, three-wheeled vehicles, which are improved versions of two-wheeled vehicles, have been widely used in the past, but when making sharp turns, the driver must shift his or her weight, and as the weight shifts, the stability of the vehicle deteriorates.

On the other hand, in regular four-wheeled vehicles, the steering mechanism is steered by a round steering wheel or an airplane-style steering wheel, and the seat is a sit-down type, so it is difficult to make sharp turns due to the shift of weight or maintain the balance of the vehicle. It has the disadvantage of being difficult.

Problems to be solved by the C0 invention As described above, in the past, tricycles were the only way to drive stably on rough terrain, and a rough terrain vehicle with better maneuverability and a better external shape was desired. It was rare. In addition, there is a prior art (Japanese Utility Model Publication No. 56-73694) in which the front wheels are arranged slightly apart from each other as a four-wheeled vehicle for traveling on rough terrain.

However, since the frame structure of such vehicles is almost the same as that of a two-wheeled vehicle, there is a limit to increasing the distance between the wheels, and most of these vehicles have a structure similar to that of a three-wheeled vehicle.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a straddle-type four-wheeled vehicle suitable for traveling on rough terrain and capable of effectively utilizing dead space.

d. Means for Solving the Problems The present invention includes two front wheels and two rear wheels each equipped with balloon tires at the front and rear parts of a frame, and a steering shaft is rotatably supported on the frame. A seat is placed vertically in the approximate center of the vehicle body from the rear of the steering head toward the rear of the vehicle body, and the front two wheels are steered by a bar handle supported by the upper end of the steering shaft and provided with grips at both left and right ends. A straddle-type four-wheeled vehicle with steps placed between the front and rear wheels on the left and right sides of the vehicle body, approximately below the center of the seat, and driven by a bar handle and an engine mounted between the front and rear wheels to drive the wheels over rough terrain. A reinforcing frame is provided between the lower end portion of the upper frame bent toward the lower side and the horizontal portion of the lower frame, and between the intermediate portions of the upper frame and between the intermediate portions of the lower frame. A reinforcing frame is provided between the provided spacer frames, and the engine is fixed in the space via brackets provided on these reinforcing frames, and the rear end of the raised lower frame and The fuel tank is mounted between the reinforcing frame and the reinforcing frame.

e. Operation When driving the straddle-type four-wheel vehicle according to the present invention, the person straddles the seat, puts his feet on the step, and grips the bar handle with both hands.

To make a left turn, right turn, turn, etc., the bar handle is rotated in the desired direction of travel, just like a normal two-wheeled vehicle. In response to this, the steering shaft rotates by a predetermined angle, and as the arm rotates, the link mechanism is actuated. As a result, the front wheels are steered by the necessary angle, and the direction of travel of the vehicle body is changed. When making a sharp turn, the inner balloon tire dents when you change the direction of the bar handle and simultaneously shift your weight, causing it to function similarly to the differential gear of a regular four-wheeled vehicle. As a result, sharp turns are made.

f. Examples Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is a side view showing one embodiment of the straddle-type four-wheel vehicle of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a perspective view showing the frame structure of FIG. 1, and FIG. The figure is a plan view showing the cover and sheet of FIG. 2 with the cover and sheet removed.

In FIGS. 1 and 2, 1 is a saddle-type body, which has two front wheels 3 and two rear wheels 4 mounted on a frame 2 configured as shown in FIG. The wheels 3 and 4 are equipped with so-called balloon tires 5, which have low internal pressure and a wide contact surface with the ground.

The steering mechanism for steering the wheels 3 and 4 includes a link mechanism 6 as shown in FIG. 4, and a bar handle 7 with grips 701 attached to both ends is used as the handle for operating the link mechanism 6. There is.

The structure of the frame 2 will be explained with reference to FIG. The frame 2 includes a pair of upper frames 81, 8□ and a lower frame 91.9□, and these upper frames 8
1.8□ It is composed of a plurality of reinforcing or spacer frames 10 that maintain a predetermined distance between each other and the lower frame 91°9. The above upper frame 8I,
8□ bends the tip portion 801 forward and diagonally downward, forms a predetermined length of an inclined portion 803 that slopes downward at a gentle angle behind the bent portion 802, and forms a rear end behind the inclined portion 803. The portion 804 is bent horizontally or slightly upward. The tip of this upper frame 8□8t is connected to the axle 11 that supports the front wheel 3, and between the tip portions 801 is a U-shaped fixing frame 13 for screwing the front cover 12. It is installed. Upper frame 8
A steering rod 15 that supports the steering shaft 14 of the bar handle 7 is provided at the bent portion 802 of +I8g.

On the other hand, the lower frame 91.9□ has its tip connected to the axle 11.
The rear end portions 901 are bent to stand up and connected to the rear end portions 804 of the upper frame 8.8□. The tip portion 801 bent toward the lower side of the upper frame 81, 88 and the lower frame 97, 9! A reinforcing frame 100 is provided between the horizontal portion 900 of the
, and one reinforcing frame 103 is provided between the spacer frames 101 and 102 provided between the middle parts of the upper frames IL and 8z and between the middle parts of the lower frames, and the upper frame 8. ．． 8° and lower frame 9. ．． The space surrounded by 9□ is divided into front and rear. And these reinforcing frames 100.10
The engine 18 is mounted in the front space A, and the fuel tank 19 is mounted in the rear space B via brackets 104 and 105 provided at the rear space B. Note that a bracket for the fuel tank 19 is not shown.

A step 16 for the driver is installed in the middle of the lower frame 91.9t, and the step 16 adopts a bar type. It is located inside the connecting line. A support portion 903 that supports the drive shaft 17 of the rear wheel 4 is provided at the bent portion 902 of the lower frames 91 and 9t.

Next, a steering mechanism for steering the front wheels 3 will be explained with reference to FIG. 4.

The front wheel 3 is mounted so as to be steerable on a U-shaped frame 20 mounted on both ends of the axle 11 as shown in FIGS. Support pipe 2 provided integrally with support shaft 22
2a is pivotally supported on the frame 20. A spacer 221. is provided between the support pipe 22a and the king pin 21. and a bushing 222 is loosely fitted.

The steering shaft 14 is connected to the above-mentioned steering head 1.
5, as shown in FIGS. 7 and 8, a resin spacer 151 is attached.
The upper end is rotatably supported by bolting through the axle 11, and the lower end is rotatably supported by a support portion 23 provided at an intermediate position of the axle 11. An arm 24 is attached to the lower end of the steering shaft 14, and one end of left and right tie rods 25 is rotatably supported by the arm 24 via a pin 26. The other end of the tie rod 25 is rotatably supported by an arm 28 attached to the wheel support shaft 22 by a pin 27. As a result, the steering shaft 14 and the front wheel 3 are connected by the link mechanism 6, and the front wheel 3 is steered by operating the bar handle 7.

On the other hand, the rear wheels 4 are supported by a rear axle 17 to which power from an engine 18 is transmitted via a power transmission mechanism (not shown).

Next, returning to FIGS. 1 and 2, the covers disposed as the exterior of the body 1 are the front cover 12,
The front cover 12 and rear cover 29 are divided into two parts, and the front cover 12 and the rear cover 29 integrally form a front fender 121 and a rear fender 291, respectively. The front cover 12 is a front fender 1 that covers the upper parts of the left and right front wheels 3.
21, a bridge section 122 connecting these fenders 121, and a bridge section 122 that stands up diagonally rearward from the rear of this bridge section 122, and the above-mentioned steering shaft 14.
A front wall 123 covering the front and left and right side walls 124 provided between the front wall 123 and the fender 121 are integrally formed. The bridge portion 122 is formed in a recessed portion relative to the fender 121 . Above front wall 1
23 is composed of a front plate 123a provided with an air intake port 30 and screw holes 31, and left and right side plates 123b provided rearward from both sides of this front plate 123a.

The side wall 124 is provided continuously at the lower end of the side plate 123b, and its front portion is formed integrally with the left and right fenders 121, and its rear portion faces both sides of the engine 18 to form a skirt portion 124a. A protruding piece 33 having a screw hole 32 is provided at the rear end edge of this side wall 124 .

The front cover 12 is screwed to the fixing frame 13 through the screw hole 31, and is screwed through the screw hole 32 into the screw hole 34a of the protruding piece 34 provided on the inclined portion 803 of the upper frame 88.8□. It's stopped.

On the other hand, the rear cover 29 has an opening 292 on the top surface, and the engine 18 and fuel tank 19 are located below the opening 292.
will be placed. This rear cover 29 is screwed to the upper frame 8□8t at several locations.
A sheet 35 is placed on top of.

On the other hand, a bumper 36 for protecting the front surface of the body 1 is attached to the axle 11.
6 is a main pipe 37 bent into an inverted U-shape, and a plurality of auxiliary pipes 3 that are connected to opposite parts of the main pipe 37.
It consists of 8. The main pipe 37 can also be used as a lifting handle when lifting the vehicle body. In addition, a protective plate 39 is provided on the lower side of the 8-bumper 36.
By installing this, you can further protect the engine. When driving the straddle-type four-wheeled vehicle for traveling on rough terrain according to the present invention, the driver straddles the seat 35 and places his/her feet on the step 16 and grips 701 of the bar handle 7.
Run by holding it with both hands. Then turn left or right.

To turn, etc., the bar handle 7 is rotated in the desired direction of travel, like a normal two-wheeled vehicle. Accordingly,
The steering shaft 14 rotates by a predetermined angle, and the arm 2
Along with the rotation of 4, the link a side 6 is activated. As a result, the front wheels 3 are steered by the necessary angle, and the direction of travel of the vehicle body is changed. Then, when making a sharp turn, the direction of the bar handle 7 is changed and the weight is shifted at the same time, causing the inner balloon tire 5 to dent, similar to the differential gear of a normal four-wheeled vehicle. This function is used to perform sharp turns, etc. Also, obstacles such as stones that collide with the front of the body 1 while driving are removed from the bumper 36.
protected by This bumper 36 can be used as a handle for lifting the body 1 when changing the direction of the body 1.

Note that when inspecting the engine 18, seat 3
This can be easily done by removing 5.

Further, since the fuel tank 19 is arranged at the rear side of the engine 18, the dead space can be used effectively, and the steering head 15 can be weighed.

Further, when the vehicle is running, the wind that hits the front surface of the front cover 12 is directed toward the rear and lower rear of the vehicle along the front fender 121 and the skirt portion 124a.

The engine 1 is located in the center of the frame 2.
Cool the sun effectively.

Note that the front wall 123 may be formed separately and assembled to the main body consisting of the fender 121 and the bridge portion 122.

g. Effects of the Invention As described above, the straddle-type four-wheeled vehicle for traveling on rough terrain of the present invention has the following effects.

Two front wheels and two rear wheels are provided, each of which is equipped with a balloon tire, and the front wheels are rotatably supported on both sides of the axle, and a steering mechanism for steering these front wheels is operated by a bar handle. This makes it more stable than a tricycle, and the characteristics of the balloon tires allow it to make sharp turns. In addition, the seat is saddle-type, with bar handles and bar steps, so it can be operated like a two-wheeled vehicle, and it is easy to shift your weight when making sharp turns. Further, since the front cover has the left and right fenders, the bridge portion, the front wall, and the side wall integrally formed, the appearance can be improved.

Furthermore, we adopted a link climate as the steering climate, so
The front wheels can be easily steered without changing the direction of the axle.

Furthermore, since the fuel tank is placed behind the engine, dead space can be used effectively, and the engine and fuel tank can be used effectively.

[Brief explanation of drawings]

1 and 2 show an embodiment of the straddle-type four-wheeled vehicle for traveling on rough terrain according to the present invention, with FIG. 1 being a side view and FIG. 2 being a plan view. FIG. 3 is a perspective view showing the frame structure of FIG. 1;
Fig. 4 is a plan view of Fig. 2 with the cover and seat removed, Fig. 5 is a sectional view showing the joint between the axle and the front wheel, and Fig. 6 is a sectional view taken along line A-A in Fig. 5. , FIG. 7 is a partial sectional view showing the support structure of the steering shaft, and FIG. 8 is a sectional view taken along the line A--A in FIG. 7. 1...Body, 2...Frame,
3...Front wheel, 4...Rear wheel, 5...
...Balloon tire, 6...Link mechanism, 7
... Bar handle, 11 ... Axle, 12 ... Front cover, 14 ... Steering shaft, 16 ... Step, 19 ... Fuel tank, 24.28 ...
Arm, 29...Rear cover, 30...Air intake port, 100...Reinforcement frame, 101, 102...Spacer frame, 103...
- Reinforcement frame, 104.105...Platen 900...Horizontal part, A...Front space part, B...Rear space part. Patent applicant: Suzuki Automobile Industry Co., Ltd. - Iccho, patent attorney, Hisashi Okuyama 1)...1ξ-
△Niji (and 2 others) Figure 1 Figure 2 M Figure 4

Claims (1)

[Claims] The rear part of the steering head part has two front wheels and two rear wheels each equipped with balloon tires on the front and rear sides of a frame consisting of a pair of upper and lower frames, respectively, and a steering shaft is rotatably supported on the frame. A seat is placed vertically in the center of the vehicle toward the rear of the vehicle, and the front two wheels are steered using a bar handle that is supported by the upper end of the steering shaft and has grips on both left and right ends. A straddle-type four-wheeled vehicle, which is arranged between the seats on the left and right sides of the vehicle body approximately below the center, and is driven by a bar handle and driven by an engine mounted between the front and rear wheels to drive the wheels over rough terrain, A reinforcing frame is provided between the tip portion bent toward the lower side of the upper frame and the horizontal portion of the lower frame, respectively,
In addition, one reinforcing frame is provided between the spacer frames provided between the middle parts of the upper frames and between the middle parts of the lower frames, and the engine is connected to the space through the brackets provided to these reinforcing frames. A straddle-type four-wheeled vehicle for traveling on rough terrain, characterized in that a fuel tank is fixed to the rear end of the raised lower frame and the reinforcing frame.