JPH0241476B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-wheeled motor vehicle in which the axles of a pair of left and right rear wheels serve as drive shafts connected to an engine, and are pivotally supported by a swing arm pivotally connected to a 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 axle 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.

It is an object of the present invention to provide a device that eliminates such inconveniences, and uses the axle 2 of the pair of left and right rear wheels 1, 1 as a drive shaft connected to the engine, and connects this to the front body frame 3. In a three-wheeled motor vehicle that is pivotally supported by a swing arm that is pivotally connected to the swing arm 4, a projecting piece 9 that extends downward is provided on the rear part of the swing arm 4, and the upper end is connected to the vehicle body frame via the projecting piece 9. the lower end of the reaction 10,
It is characterized in that a guard plate 6 covering the lower surface of the member 5 around the axle 2 is fixed.

In the illustrated example, the axle 2 is supported via bearings 8 at both ends within a cylindrical shaft 7 attached to the rear ends of a pair of left and right swing arms 4, 4, as shown in FIG. 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 wing parts 6a and 6b bent downward on both sides with a fixed part 6c fixed to the projecting pieces 9 of the arm 4 in the middle, and the chain 5a and the wing part 6a on one side are bent downward. The plate 6 covers the sprocket 5b and also covers the brake 5c with the wing portion 6b on the other side.The plate 6 is a plate material that extends forward along the swing arms 4, and at its front end, the left and right swing arms 4 are attached as shown in FIG. , 4 was screwed to the bracket 11 that spans the two.

Next, to explain its operation, when the vehicle body moves up and down, the swing arms 4, 4 generate a 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, which is almost the same as when driving on two wheels by tilting the vehicle body and turning the steering wheel, the guard plate 6 existing between the pair of rear wheels 1 and 1 moves further away from the ground due to the tilt of the vehicle body, and becomes a hindrance to the change of direction. It never becomes.

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.
This prevents the guard plate 6 from coming into contact with the ground due to the rocking of the arm 4, the vertical movement of the vehicle body, or the tilting of the vehicle body, and the members 5 around the axle can be reliably protected. Plate 6 is reaction 1
0, since it is fixed to the protrusion 9 protruding from the rear of the swing arm 4, its installation is easy, and the attachment part can be made smaller and the unsprung weight can be reduced. The extending protrusion allows the reaction to be disposed below the vehicle body, which has the effect of lowering the center of gravity of the vehicle body.

[Brief explanation of drawings]

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)

[Claims] 1. In a three-wheeled motor vehicle in which the axle 2 of a pair of left and right rear wheels 1, 1 is connected to the engine as a drive shaft and is pivotally supported by a swing arm 4 pivotally connected to a front body frame 3, the swing arm 4 A guard plate 6 which covers the lower end of the reaction 10 whose upper end is connected to the vehicle body frame via the protruding piece 9 and the lower surface of the member 5 around the axle 2. An under guard device for a three-wheeled motor vehicle, characterized in that: