MOTORCYCLE COMPRISING A CUSHION CONNECTING ROD
FIG5 is a side view of the cushion connecting rod
FIG5 is a side view of the cushion connecting rod 40. Supporting portions 61 formed with the through holes 61a are provided at both the ends of the metallic member 60 of the cushion connecting rod 40. First lightening holes 65, second lightening holes 66 and third lightening holes 62 each having a vertically and bilaterally symmetrical shape are formed between the supporting portions 61 at both the ends. As shown in FIG5, since the recessed portion C of the metallic member 60 is configured with the linear portion A and the inclined portions B, when the tensile load F exceeding the strength margin is applied to the cushion connecting rod 40, the forces Fw for separating the fiber-reinforced plastic 50 are generated. Thereby, the fiber-reinforced plastic 50 is easily separated from the positions of the points 100. As a result, since the separation of the fiber-reinforced plastic 50 can be visually easily recognized at the points 100, time for replacement of the cushion connecting rod 40 can be more easily recognized.
side view
69
center rib
100
points
64
vertical ribs
40
cushion connecting rod
66
second lightening holes
61
supporting portions
65
lightening holes
62
lightening holes
200
dashed circle
68
second outer walls
13
exhaust pipe
['1. A motorcycle (1) comprising a swing arm (17), a rear cushion (15), a link plate (30), and a cushion connecting rod (40), the swing arm (17) rotatably supporting a rear wheel (WR) and also being swingably attached to a vehicle body frame (2), the rear cushion (15) applying swinging reaction to the swing arm (17), the link plate (30) supporting the rear cushion (15) and the swing arm (17) in a mutually swingable manner, the cushion connecting rod (40) swingably supporting one end of the link plate (30) to the vehicle body frame (2), wherein the cushion connecting rod (40) is a long member applied with a load (F) when the swing arm (17) is swung against springing force of the rear cushion (15), the cushion connecting rod (40) is configured in such a manner that a part of a surface of a metallic member (60) is covered with an endless fiber-reinforced plastic (50), and the fiber-reinforced plastic (50) adheres to the surface of the metallic member (60) with a film adhesive (52).', '2. The motorcycle (1) according to claim 1, wherein the metallic member (60) has both ends in a longitudinal direction provided with respective supporting portions (61) applied with the load (F), a recessed portion (C) and a plurality of lightening holes (62, 65, 66) are formed between the supporting portions (61) at both the ends, the recessed portion (C) being configured in such a manner that a thickness dimension (T) of the metallic member (60) is set to be smaller than a thickness dimension (Ta) of the supporting portions (61), and the fiber-reinforced plastic (50) covers surfaces of at least the supporting portions (61) and the recessed portion (C).']