JPH0351277Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a three-wheeled motor vehicle in which a pair of left and right rear wheels serve as a drive shaft connected to the engine, which is pivotally supported by a swing arm pivoted to the front body frame. This invention relates to an under guard device.

Originally, in this type of three-wheeled vehicle, when one of the rear wheels falls into a pothole, etc., or when there is an obstacle such as a stone between the rear wheels, the power transmission system parts around the wheels may fall onto the ground or an obstacle. In this case, it may be possible to attach a guard plate located below these members to the body frame, but if the guard plate is simply attached to the body frame, the swing arm will be damaged. These members may come into contact with the guard plate due to movement, or the guard plate may contact the ground or an obstacle due to the vertical movement of the vehicle body, resulting in damage.

The purpose of the present invention is to provide a device that eliminates such inconveniences, and uses a pair of left and right rear wheels 1 and 1 as a drive shaft connected to the engine.
In a three-wheeled motor vehicle in which the swing arm 4 is pivotally supported by a swing arm pivotally connected to a front body frame 3, the swing arm 4 is connected to transmission system members 5a, 5b and a braking system member 5c disposed around the axle 2. Formed as a pair of left and right arms near the center line of the vehicle between
Guard plate 6 that covers the member 5 around the rear axle from below
, a fixed part 6c fixed to the lower part of the swing arm 4 by fixed parts 6e and 6e provided spaced apart on the left and right, an extending part 6d extending downward from the fixed part 6c, and an extending part 6d extending outward from the extending part 6d. The vehicle is characterized by being provided with a wing portion 6a that covers the lower surface of the member 5 around the axle.

In the illustrated wheel 2, as shown in FIG. 4, the wheel 2 is supported within a cylindrical shaft 7 attached to the rear ends of a pair of left and right swing arms 4, 4 via bearings 8 at both ends. The members 5 surrounding the axle 2 include a chain 5a connected to the engine, a sprocket 5b, and a brake 5c. The swing arms 4, 4 are provided with a relative vertical swing in accordance with the vertical movement of the vehicle body by means of a reaction 10 connected to protrusions 9, 9 protruding from their rear ends, as will be described later. Guard plate 6 was installed.

The guard plate 6 has a fixing member 6c fixed to the left and right projecting pieces 9, 9 of the arm 4 by fixing members 6e, 6e, and an extending portion 6d bent downward on both sides thereof, and an extending portion 6d extending outward. The wing portion 6a on one side is provided with a distance L from the fastener 6e.
Chain 5a and sprocket 5b at the outer position of
The brake 5c is covered with the wing part 6c on the other side.
Furthermore, the plate 6 is a plate extending forward along the swing arms 4, 4, and the front end of the plate 6 covers the left and right swing arms 4, 4 as clearly shown in FIG.
It was fixed to the bracket 11 that spans the frame with fixing tools 6e and 6e.

Next, to explain its operation, when the vehicle body moves up and down, the swing arms 4, 4 generate relative vertical swing and are held at a constant height equal to the diameter of the rear wheel 1 relative to the ground. The guard plate 6 attached to this is also held at a constant height to prevent it from hitting the ground due to the vertical movement of the vehicle body, and the swinging of the arms 4 causes the members 5 around the axle 2 to Even when moving up and down, the guard plate 6 is also moved up and down, so there is no contact between the two, and the weight is further shifted to one of the steps to lift one of the rear wheels 1, 1 off the road surface. Even when changing direction in substantially the same direction as the two-wheel running direction, in which the vehicle body is tilted and the steering wheel is turned, the guard plate 6 existing between the pair of rear wheels 11 is further removed from the ground due to the tilt of the vehicle body, and becomes a hindrance to the direction change. There is no.

In this way, according to the present invention, the guard plate 6 covering the lower surface of the member 5 around the axle 2 is attached to the swing arm 4.
Since the guard plate 6 is fixed to the ground, the guard plate 6 is prevented from coming into contact with the ground due to swinging of the arm 4, vertical movement of the vehicle body, or tilting of the vehicle body, and thus the members 5 around the wheels 2 can be reliably protected. The plate 6 is formed by bending the wing part 6a that covers the lower surface of the member 5 around the axle 2 further outward from the extending part 6d which bends downward from the upper fixed part 6c, so that the rigidity can be increased. I can,
Furthermore, since the guard plate 6 is fixed to the swing arm 4, the structure for fixing the guard plate 6 is significantly simpler than that of a structure fixed to the vehicle body frame. Furthermore, since the guard plate 6 is fixed with fixing devices 6e, 6e spaced apart from each other on the left and right, the wing portion 6a is fixed in place compared to the case where the guard plate 6 is fixed in the center.
The horizontal distance L of the fixing device 6e can be shortened, and the wing portion 6
Since the swinging around the fixed portion due to the vertical vibration of e can be suppressed to a small extent, fatigue and stress concentration of the guard plate 6 can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a three-wheeled motor vehicle equipped with the proposed device, Fig. 2 is a cross-sectional side view of its main parts, Fig. 3 is a rear view cut along the line - - in Fig. 2, and Fig. 4 is a cross-sectional view of the main part thereof. - is a partially cutaway rear view seen from the line. 1... Rear wheel, 2... Axle, 3... Vehicle body frame, 4... Swing arm, 5... Members around the axle, 6... Guard plate.

Claims (1)

[Scope of utility model registration request] The axle 2 of the pair of left and right rear wheels 1, 1 is used as a drive shaft connected to the engine, and this is connected to the front body frame 3.
The automatic 3 is pivoted on the swing arm 4 which is pivotally connected to the
In the wheeled vehicle, the swing arm 4 is formed as a pair of left and right arms near the vehicle body center line between the transmission system members 5a, 5b and the brake system member 5c disposed around the axle 2, and is arranged around the rear axle. A guard plate 6 that covers the member 5 from below has a fixed part 6c fixed to the lower part of the swing arm 4 with fixed parts 6e and 6e provided spaced apart on the left and right, an extending part 6d extending downward from the fixed part 6c, and An underguard device for a three-wheeled motor vehicle, characterized in that a wing portion 6a extends outward from an extension portion 6d and covers the lower surface of a member 5 around an axle.