QUAD BIKES, ATV VEHICLES

Technical Field

This invention relates to a new vehicle chassis for four-wheeled terrain motorcycles, quad bikes, atv vehicles.

Prior Art

In the prior art, we can list some problems encountered for four-wheeled terrain motorcycles, such as quad bikes and atv vehicles.

For example i) skidding of the vehicle at high speeds, loss of vehicle control, ii) losing the vehicle control, especially when the rear wheels lose the contact with the ground when turning from bends, iii) damage, breakage, breakdown of the vehicle chassis in the event of shock, accident, high impact.

The problem of skidding of the vehicle at high speeds, loss of vehicle control : To solve this problem, a special design is used in the vehicle chassis according to the present invention. It is a well-known fact that one of the most important reasons for this skidding problem is the fact that at high speed, the vehicle gradually becomes lighter and therefore the force of the ground pressing is greatly reduced. In the present invention, in order to increase the forward press at high speeds in the vehicle chassis, the front cage and the rear cage mounted on the four carrier profiles carrying the chassis and the frames forming these cages are specifically designed. In particular, the fact that, for the front frame and rear frame forming the front cage, the upper element forming the upper part of the frame is at a small distance behind the lower element forming the lower part of the frame, increases the ground pressing force of the vehicle chassis at high speeds. This is a brand-new mechanical innovation which is not seen in normal chassis and has a big effect on the result. The four-wheel terrain motorcycle carrying the vehicle chassis according to the present invention can drive up to 200 km / h in tests. However, we limit the optimum speed for driving safety to 160 km / h. Equivalent vehicles can only reach 60-80 km per hour. This is due to the characteristics of the chassis of the vehicle according to the present invention. Even if strong engines are fitted to the equivalent vehicles, the chassis in the vehicle does not have the power to withstand high speeds. The problem of losing the vehicle control, especially when the rear wheels lose the contact with the ground when turning from bends: For the solution of this problem, in the vehicle chassis according to the present invention, the design of the so-called suspension arms that allow the wheels to move up and down independently of each other has been innovated. For each wheel there are two suspension arms, as being upper and lower. In the chassis according to the present invention, designed for use on four-wheeled vehicles, there are 8 suspension arms, four of which are at the front and four of them are at the rear. Here, the outer contours of the suspension arms are redesigned and solid steel is used instead of the material commonly used in the market. Changing the material in the suspension arms and the external mechanical design gives these suspension arms the ability to control the rear wheels much better in road bends.

The problem of damage, breakage, breakdown of the vehicle chassis in the event of shock, accident, high impact: In order for the vehicle chassis to withstand the high impact, the chassis must consist of durable parts and also, the chassis must be capable of stretching at the desired regions and parts in order to absorb and damp the shock impact. Otherwise, shock forces can damage the parts forming the chassis and cause them to bend and twist or even break. In order to overcome this problem, in the vehicle chassis according to the present invention, some new techniques which are not normally used in the chassis of the quad bike and ATV vehicles have been used. First, rectangular profiles were used instead of the generally used pipe profiles. The rectangular profiles are superior to the pipe profiles in terms of their durability, as well as they enable new mechanical design possibilities for higher shock resistance of the chassis design. For example, you cannot open some rectangular slots for fitting parts into the pipe profiles by cutting the pipe, because the pipes will be broken and twisted from these cut regions immediately. However, in rectangular profiles, you can open the rectangular slots by cutting the profile and use them as welding guides on which the pieces are placed.

In the vehicle chassis according to the invention, another discovery by trial and error method is the use of wig welding (Wolfram Inert Gas welding) to assemble the parts of the vehicle chassis together to increase the shock resistance of the chassis relative to normal welding methods. In our observations, it has been discovered that the normal welding materials do not stretch at all during the shock stroke, ie they are rigid, whereas the welds made by Wig welding can be moved without breaking in mm and that flexing creates this strength superiority. Flexing of the welding region without breaking absorbs and damps the shock on the chassis, so that this shock stroke does not damage the parts that make up the chassis.

In addition, at the Mechanical Laboratory of Osnabriick University of Applied Sciences, Hochschule Osnabriick in Germany, all the elements that make up the chassis and the chassis have been subjected to many strength tests and have been found to have sufficient strength at high speeds.

Summary of the Invention

The present invention relates to a vehicle chassis for four-wheeled terrain motorcycles, and it comprises: 4 carrier profiles, a front cage and a rear cage, vehicle chassis comprises a front left lower suspension arm, front left upper suspension arm, front right lower suspension arm, front right upper suspension arm, and a rear left lower suspension arm, rear left upper suspension arm, rear right lower suspension arm, rear right upper suspension arm, said lower left, upper left, lower right and upper right carrier profiles are made of square profiles, said lower left, upper left, lower right and upper right carrier profiles, comprise welding guide slots formed by cutting from the square profile.

Description of the Figures

Figure la shows a left side view of the vehicle chassis according to the present invention from the top perspective,

Figure lb shows a right side view of the vehicle chassis according to the present invention from the top perspective,

Figure 2 shows a front view of the vehicle chassis according to the present invention,

Fig. 3a shows a top view of the vehicle chassis according to the present invention,

Figure 3b shows a bottom view of the vehicle chassis according to the present invention, Figure 4a shows a left side view of the vehicle chassis according to the present invention, Figure 4b shows a right side view of the vehicle chassis according to the present invention, Figure 5 shows an exploded view of the front cage,

Figure 6 shows an exploded view of the rear cage,

Figure 7 shows a partial exploded view of the vehicle chassis according to the present invention from the upper perspective,

Figures 8a, 8b, 8c show left side views of the vehicle chassis according to the present invention,

Figure 9a shows the lower carrier profiles and the front cage and the rear cage on these profiles,

Figure 9b shows welding guide slots,

Figure lOa shows a top perspective view of the rear cage, Figure lOb shows the parts of the rear cage,

Figure 1 la shows a top perspective view of the front cage, Figure 1 lb shows the parts of the front cage,

Figure 12 shows the parts of the carrier profiles.

References

1 Lower left carrier profile

101 First part

102 Second part

103 Third part

104 Fourth part

2 Upper left carrier profile

201 First part

202 Second part

203 Third part

204 Fourth part

205 Fifth part

3 Lower right carrier profile

301 First part

302 Second part

303 Third part

304 Fourth part

4 Upper right carrier profile

401 First part

402 Second part

403 Third part

404 Fourth part

405 Fifth part

5 Front cage

51 Front cage front structure

52 Front cage rear structure 6 Rear cage

61 Rear cage front structure

62 Rear cage rear structure

7 Rear cage fixing element

8 Front frame upper element

9 Front frame lower element

10 Rear frame upper element

11 Rear frame lower element

12 Frame connecting part

13 Front frame

14 Rear frame

15 Frame connecting part

16 Front left lower suspension arm

17 Front left upper suspension arm

18 Front right lower suspension arm

19 Front right upper suspension arm

20 Rear left lower suspension arm

21 Rear left upper suspension arm

22 Rear right lower suspension arm

23 Rear right upper suspension arm

24 Engine intervention and support part

25 Connecting side part

26 Steering lower housing

27 Steering box

28 Fuel tank

29 Rear fairing support unit

30 Reinforcement part

31 Welding guide slot

Detailed Description of The Invention

As seen in the figures, the present invention relates to a vehicle chassis for four-wheeled terrain motorcycles, and it comprises:

- lower left carrier profile (1), upper left carrier profile (2), lower right carrier profile (3), upper right carrier profile (4), - a front cage (5) positioned at the front and a rear cage (6) located at the rear for attaching the carrier profiles (1, 2, 3,4),

- said front cage (5) comprises a front cage front structure (51) and a front cage rear structure (52), which consist of a front frame upper element (8) and a front frame lower element (9) which is located on the lower side immediately in front of the front frame upper element (8), a rear frame upper element (10), and a rear frame lower element (11) which is located on the lower side immediately in front of the rear frame upper element (10),

- said rear cage (6) comprises a rear cage front structure (61) and a rear cage rear structure (62), which consist of a front frame (13) and a rear frame (14),

- vehicle chassis comprises, as a part of the suspension system of the wheels, 2 for each wheel, a front left lower suspension arm (16), front left upper suspension arm (17), front right lower suspension arm (18), front right upper suspension arm (19), and a rear left lower suspension arm (20), rear left upper suspension arm (21), rear right lower suspension arm (22), rear right upper suspension arm (23),

- said lower left, upper left, lower right and upper right carrier profiles (1, 2, 3, 4) are made of square profiles,

- said lower left, upper left, lower right and upper right carrier profiles (1, 2, 3, 4),

comprise welding guide slots (31) formed by cutting from the square profile, which allow the assemblies to be mounted thereon. Said welding guide slots (31), are shown in Fig. 9a and 9b as representative.

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Said suspension arms (16, 17, 18, 19, 20, 21, 22, 23) have a special mechanical design in terms of strength and they are not made of hollow pipes, but are made of solid steel.

In the vehicle chassis according to the present invention, said rear cage (6) comprises a rear cage fixing element (7) at the top. Furthermore, said front cage (5) has frame connecting parts (12) and rear cage (6) has frame connecting parts (15).

In addition, a vehicle chassis according to the present invention, also comprises, engine intervention and support part (24), one at the right side and one at the left side, connecting side part (25), one at the right side and one at the left side, reinforcement part (30), one at the right side and one at the left side. In an embodiment according to the present invention, said vehicle chassis further comprises a steering lower housing (26), a steering box (27), a fuel tank (28), a rear fairing support unit (29).

Said lower left carrier profile (1) comprises 4 parts, first, second, third and fourth parts (101, 102, 103, 104). Said upper left carrier profile (2) comprises 5 parts, first, second, third, fourth and fifth parts (201, 202, 203, 204, 205). Said lower right carrier profile (3) comprises 4 parts, first, second, third and fourth parts (301, 302, 303, 304). Said upper right carrier profile (4) comprises 5 parts, first, second, third, fourth and fifth parts (401, 402, 403, 404, 405).

As shown in Fig. 5, front frame upper element (8) is at a certain distance (d) behind the front frame lower element (9). Likewise, the rear frame upper element (10) is at the same distance (d) behind the rear frame lower element (11). This distance (d) is, in a preferred embodiment, approximately 2 cm, without limiting the present invention.

In the present invention, the type of welding for connecting the parts is Wig welding. The Wig welding, is referred to Wolfram Inert Gas welding in English. The reason for using this welding is that it allows the chassis of the vehicle according to the present invention to be able to flex at the welding points in moments of shock and impact, thereby absorbing and eliminating the shock force. This type of welding has a flexibility of 1-2%. Even this amount of flexibility has considerably increased the impact strength of the vehicle chassis according to the present invention. Wig welding is also a very clean welding and its thickness can be adjusted as desired.

In practice, with the vehicle chassis according to the present invention, high-speed skidding problem on four-wheeled terrain motorcycles, the problem that the rear wheels lose contact with the soil in bends and the problem of damage to the vehicle chassis at times of shock, accident are solved and a brand new four-wheeled terrain motorcycle chassis has been unveiled.