JPH0788127B2 - Suspension device for saddle type four-wheeled vehicle for running on rough terrain - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a suspension device for a saddle-type four-wheel vehicle for traveling on uneven terrain, which can reduce the number of manufacturing processes and improve the strength.

b. Conventional technology As a vehicle that runs on so-called rough terrain such as a coast or a wasteland, it is required that a driver's vehicle easily balances while riding and has good maneuverability. Therefore, a three-wheeled vehicle or a four-wheeled vehicle, which is an improved two-wheeled vehicle, has been developed.

FIG. 3 shows a saddle-ride type four-wheel vehicle for traveling on rough terrain of this kind. The four-wheel vehicle is a saddle-type frame 100.
The front wheel 101 and the rear wheel 102 are provided on each of the two wheels.
A so-called balloon tire 103, which has a low internal pressure and a wide contact surface with the ground, is provided at the 1,102.
A link mechanism (not shown) is used as a steering mechanism for steering the wheels 101 and 102, and a bar handle 104 is used as a handle for operating the link mechanism.

In such a saddle type four-wheeled vehicle, a double wishbone suspension arm or a swing arm suspension arm is adopted as a suspension mechanism for supporting the front wheels.

The double wishbone suspension arm consists of an upper part and a lower part.
The wheels are supported by a pair of suspension arms.

FIG. 4 shows a double wishbone suspension arm, in which the front wheel 101 is respectively supported by two sets of suspension arms 105 and 106, which are swingably supported by the frame 100 and are composed of upper and lower left and right upper and lower suspension arms, respectively. There is. These suspension arms 105,
106 has a pivot part 107 for pivotally supporting the frame 100 at one end, and a member for supporting the wheel 101 at the other end, for example, a connection when supporting a knuckle arm attached to the wheel 101. It is composed of two arm members 109 to which a pipe 108 is attached.

c. Problem to be Solved by the Invention However, in such a conventional suspension apparatus for a saddle-ride type four-wheeled vehicle for traveling on uneven terrain, two arm members 109 are used.
In the middle of the process, the tip portion is bent, the tip portion is crushed and molded, both arm members 109 are welded together, and the tip end is welded to the connecting pipe 108.

For this reason, since there are two bent portions of the arm member 109, the length of the arm member 109 becomes longer, and
As the weight increases, there is concern about strength in connection with the connecting pipe 108.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a suspension device for a saddle-ride type four-wheeled vehicle for traveling on uneven terrain, which can solve the above problems and reduce the manufacturing process and improve the strength.

d. Means for Solving the Problems The present invention provides a knuckle arm bracket 7 having a base end portion swingably supported by the left and right lower tubes 4, 4 of the vehicle body frame 1 and a tip end portion supporting a wheel. In a suspension device for a saddle-type four-wheeled vehicle for traveling on uneven terrain, which comprises a mounted suspension arm 5 and a suspension unit 6 composed of a shock absorber and a spring for suspending the tip end of the suspension arm 5 on the vehicle body frame 1, A rear arm member 5b, which is constructed by bending the suspension arm 5 at one position in accordance with the steering angle, and is welded to the back surface of the knuckle arm bracket 7 via the tip end side surface 5b2 thereof. Bend one point in the middle, then weld the tip 5a1 to the back of the knuckle arm bracket 7 and attach the side 5a2 to the arc. Constituted by a front arm member 5a that 熔着 the tip end surface 5b1 of the member 5b, in providing the reinforcing member 11 between the distal end portion cross of the front arm member 5a and the rear arm member 5b.

e. Examples Hereinafter, the suspension device for a saddle-ride type four-wheel vehicle for traveling on uneven terrain according to the present invention will be described in detail with reference to the illustrated examples.

In FIG. 1 ab and FIG. 2, 1 is a vehicle body frame of a saddle-ride type four-wheeled vehicle for running on uneven terrain, and 2 is a swing arm type front suspension that supports left and right front wheels 3, 3.

The front suspension 2 includes a suspension arm 5 swingably supported by the left and right lower tubes 4, 4 of the vehicle body frame 1, a shock absorber and a spring for suspending the tip of the suspension arm 5 on the vehicle body frame 1. And a suspension unit 6. The suspension arm 5 is composed of two arm members 5a and 5b, and one rear arm member 5b is formed by bending one point in accordance with the steering angle, and through a tip side surface 5b2 thereof. It is welded to the back surface of the knuckle arm bracket 7. On the other hand, the other one arm member 5a on the front side is bent at one point in the middle and then the tip 5a1 is welded to the back surface of the knuckle arm bracket 7 by welding.
And weld the side surface 5a2 to the tip end surface 5b1 of the arm member 5b.
is doing. A pivot portion 9 for pivotably supporting a bracket 8 provided on the vehicle body frame 1 is provided at each base end portion of the arm members 5a and 5b. Reference numeral 10 denotes a suspension bracket 11 which is mounted on the knuckle arm bracket 7 and a reinforcing member 11 provided between the arm members 5a and 5b.
The suspension unit 6 is arranged between the suspension unit bracket 8 mounted on the upper side of the vehicle body frame 1 and the suspension unit 6.

f. Effects of the Invention As described above, according to the suspension device for a saddle riding type four-wheel vehicle for traveling on uneven terrain according to the present invention, the base end portion is rocked on the left and right lower tubes 4, 4 of the vehicle body frame 1. A suspension arm 5 that is movably supported and has a knuckle arm bracket 7 that supports a wheel at its tip portion, and a suspension unit 6 including a shock absorber and a spring that suspends the tip portion of the suspension arm 5 on the vehicle body frame 1. In the suspension device for a saddle-ride type four-wheeled vehicle for traveling on uneven terrain, the suspension arm 5 is formed by bending the suspension arm 5 at one position in accordance with the steering angle, and through the tip side surface 5b2 thereof. The rear arm member 5b welded to the back surface of the knuckle arm bracket 7 and the tip 5a1 of the rear arm member 5b are bent at one point in the middle. Since the side surface 5a2 is welded to the back surface of the knuckle arm bracket 7 and the front side arm member 5a is welded to the tip end surface 5b1 of the arm member 5b, each arm member is bent once and crushed. Since processing etc. can be omitted, the number of manufacturing steps can be reduced. Further, the rear side arm member 5b is welded to the rear surface of the knuckle arm bracket 7 for supporting the wheel on the side surface, and the front side arm member 5b is welded.
The tip of 5a is welded to the back surface of the knuckle arm bracket 7, and the side surface of the front arm member 5a is attached to the arm member.
The reinforcing member 11 is welded to the tip end face of the 5b and the reinforcing member 11 is provided between the tip portions of the front arm member 5a and the rear arm member 5b, so that the connection is reliable and the strength can be improved. Therefore, it is possible to sufficiently cope with an impact when traveling on an uneven terrain.

[Brief description of drawings]

FIG. 1 ab shows an embodiment of a suspension device for a saddle-ride type four-wheeled vehicle for traveling on rough terrain according to the present invention, in which a is a front view and b is a front view.
[Fig. 2] is a plan view of Fig. 1a. FIG. 2 is a perspective view showing a connecting portion between a suspension arm and a knuckle arm bracket, FIG. 3 is a perspective view showing a saddle-ride type four-wheel vehicle for running on uneven terrain, and FIG. 4 is a perspective view showing a conventional suspension arm. It is a perspective view showing a body frame of a saddle type four-wheeled vehicle provided. 1 ... Body frame, 2 ... Front suspension, 3 ... Front wheel, 5 ... Suspension arm, 5a, 5b ... Arm member, 7 ... Knuckle arm bracket, 10 ... Suspension bracket.

Claims (1)

[Claims] 1. A suspension arm 5 having a knuckle arm bracket 7 having a base end portion swingably supported by the left and right lower tubes 4, 4 of the vehicle body frame 1 and a tip end portion for supporting a wheel, and a suspension arm 5. Suspension arm 5
In a suspension device for a saddle riding type four-wheel vehicle for traveling on uneven terrain, which comprises a shock absorber for suspending the tip of the vehicle body frame 1 and a suspension unit 6 including a spring, the suspension arm 5 is provided with a steering angle And the rear arm member 5b welded to the back surface of the knuckle arm bracket 7 via the side surface 5b2 of the tip end portion of the knuckle arm bracket 5b and the tip 5a1 of the rear arm member 5b. The front side arm member 5a is welded to the back surface of the knuckle arm bracket 7, and the side surface 5a2 is welded to the tip end surface 5b1 of the arm member 5b. The front arm member 5a and the rear arm member 5b are connected to each other at their front end portions. A suspension device for a saddle-ride type four-wheel vehicle for traveling on rough terrain, characterized by having a reinforcing member 11 provided therebetween.