JP2022153076A - Saddle-riding type vehicle - Google Patents

Abstract

To provide a saddle-riding type vehicle that can be made light-weight while securing sufficient rigidity of a top bridge.SOLUTION: A saddle-riding type vehicle (1) which has a top bridge (50) supporting a pair of right and left front forks (15) at positions close to upper ends is provided with a beveled part (55) which is directed in a substantially horizontal direction at a front end upper part of the top bridge (50) in vehicle side view with the top bridge (50) fitted to the vehicle body. A meter device (60) is arranged in front of the top bridge (50). The top bridge (50) is provided with a pair of right and left support holes (54) that the front forks (15) penetrate, and the beveled part (55) extends along a vehicle width direction up to a position where it overlaps with the support holes (54) in vehicle front view.SELECTED DRAWING: Figure 2

Description

The present invention relates to a saddle-ride type vehicle, and more particularly to a saddle-ride type vehicle having a top bridge that supports a position near the upper end of a front fork.

Conventionally, in a straddle-type vehicle having a top bridge that supports a position near the upper end of the front fork, there has been known a technique for optimizing the rigidity and weight of the top bridge.

Patent Literature 1 discloses a motorcycle in which a chamfered portion is provided at a position closer to the center in the vehicle width direction of the upper portion of the front end of the top bridge.

JP 2019-172199 A

However, in the configuration of Patent Literature 1, the area of the chamfered portion is small, and there is still room for improvement regarding the optimum shape for ensuring the rigidity of the top bridge and achieving weight reduction.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the prior art and to provide a saddle-ride type vehicle capable of ensuring sufficient rigidity of the top bridge and reducing the weight of the vehicle.

In order to achieve the above object, the present invention provides a saddle-ride type vehicle (1) having a top bridge (50) supporting positions near the upper ends of a pair of left and right front forks (15). A first feature is that a chamfered portion (55) directed substantially horizontally is provided on the upper front end of the top bridge (50) in a side view of the vehicle body with the top bridge (50) attached to the vehicle body.

The second feature is that the meter device (60) is arranged in front of the top bridge (50).

Further, the top bridge (50) is provided with a pair of left and right support holes (54) through which the front forks (15) pass. The third feature is that it extends in the vehicle width direction to a position overlapping with (54).

According to the first feature, in the straddle-type vehicle (1) having the top bridge (50) supporting positions near the upper ends of the pair of left and right front forks (15), the top bridge (50) is attached to the vehicle body. In the side view of the vehicle body in the folded state, the top bridge (50) has a chamfered portion (55) oriented in a substantially horizontal direction at the upper part of the front end thereof. The weight can be reduced by reducing the thickness of the front side.

According to the second feature, since the meter device (60) is arranged in front of the top bridge (50), the top bridge is chamfered even when the driver of the straddle-type vehicle is lying down. It is easy to see the meter device.

According to the third feature, the top bridge (50) is provided with a pair of left and right support holes (54) through which the front fork (15) passes, and the chamfered portion (55) is formed on the front of the vehicle body. As you can see, it extends in the vehicle width direction to a position overlapping the support hole (54). Visibility of the meter device can be improved.

1 is a right side view of a motorcycle according to an embodiment of the present invention; FIG. FIG. 3 is a perspective view of a top bridge; It is a cross-sectional view of the top bridge. FIG. 4 is a cross-sectional view showing the arrangement relationship between the top bridge and the meter device;

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a left side view of a motorcycle 1 according to one embodiment of the invention. A vehicle body frame 4 of a motorcycle 1 as a straddle-type vehicle has a pair of left and right main frames 5 extending downward and rearward from a head pipe 9 . The steering system for the front wheels WF pivotally supported by the head pipe 9 includes a pair of left and right front forks 15 that pivotally support the front wheels WF via axles 17, and a top bridge that clamps the front forks 15 above and below the head pipe 9. 50 , the bottom bridge 11 , and a steering stem (not shown) that connects the top bridge 50 and the bottom bridge 11 to each other and is rotatably supported by the head pipe 9 . A pair of left and right steering handles 6 are fixed to the front fork 15 .

A pair of left and right pivot frames 20 are connected to the rear end of the main frame 5 to support a pivot 19 that pivotally supports a swing arm 23 . Below the main frame 5 and in front of the pivot frame 20, a power unit P is fixed, in which a V-type four-cylinder engine E and a transmission are integrated. Combustion gas from the engine E is led to a muffler on the right side in the vehicle width direction through an exhaust pipe. The driving force of the engine E is supplied to a rear wheel rotatably supported by an axle 24 at the rear end of a swing arm 23 via an endless drive chain 26 wound around a drive sprocket 18 fixed to the output shaft. transmitted to WR.

A front cowl 10 having a windbreak screen 7 is arranged in front of the head pipe 9 . A pair of left and right side cowls 28 that cover the sides of the vehicle body are connected to the rear portion of the front cowl 10 that covers the front of the vehicle body. there is

A front fender 14 covering the upper part of the front wheel WF is fixed to a front fork 15 . A tank cover 2 that covers the top of the fuel tank 31 and the air cleaner box 3 is attached to the top of the main frame 5 . A rear cowl 29 is arranged behind the seat 30 attached to the tank cover 2 , and a rear fender 27 covering the upper part of the rear wheel WR is fixed to the upper part of the swing arm 23 .

The swing arm 23 is suspended from the body frame 4 by a rear cushion 32 arranged behind the pivot 19 . A pair of right and left wind guide pipes 13 for guiding outside air to the lower part of the air cleaner box 3 are arranged on the outer side of the main frame 5 in the vehicle width direction. The air guide pipe 13 passes through the outer side of the front fork 15 in the vehicle width direction, gathers in front of the head pipe 9, and is connected to an intake opening 12 provided in the center of the front cowl 10 in the vehicle width direction. A radiator 22 is arranged in front of the vehicle body of the engine E, and a vertically elongated oil cooler 39 is arranged below the radiator 22 which is elongated in the vehicle width direction.

A generator M driven by rotational power of a crankshaft C is provided on the left side in the vehicle width direction of the V-shaped engine E having two front cylinders and two rear cylinders. The outer side of the generator M in the vehicle width direction is covered with a cover member 40 attached to the crankcase.

FIG. 2 is a perspective view of the top bridge 50. FIG. A top bridge 50 made of metal such as aluminum is provided with a pair of left and right fork clamp portions 53 each having a support hole 54 through which the front fork 15 passes. A stem clamp portion 51 having a through hole 52 through which a steering stem passes is provided at the rear end portion of the top bridge 50 at the center in the vehicle width direction.

The top bridge 50 according to this embodiment is characterized in that a chamfered portion 55 having a large area is provided at the upper portion of the front end of the top bridge 50 . The height dimension of the front end portion 56 of the top bridge 50 is small, and the chamfered portion 55 extends in the vehicle width direction to a position overlapping the left and right support holes 54 .

FIG. 3 is a cross-sectional view of the top bridge 50. As shown in FIG. 4 is a sectional view showing the arrangement relationship between the top bridge 50 and the meter device 60. As shown in FIG. A lightening portion 57 is formed on the back side of the chamfered portion 55 . A steering stem 61 is passed through the through hole 52 of the stem clamp portion 51 , and a stem nut 60 is fastened to the upper end portion of the steering stem 61 . The front fork 15 is inclined so that the upper end side is located rearward from the lower end side, and the top bridge 50 supporting the front fork 15 is also arranged inclined rearward.

The chamfered portion 55 of the top bridge 50 according to the present embodiment is configured to be oriented in the front-rear direction of the vehicle body, in other words, in a substantially horizontal direction in a side view of the vehicle body with the top bridge 50 attached to the vehicle body. As a result, the thickness of the front side of the top bridge 50 can be reduced to reduce the weight while ensuring sufficient rigidity of the top bridge 50 .

A meter device 60 is arranged in front of the top bridge 50 . In this embodiment, since the top bridge 50 is provided with a chamfered portion 55 which is large and oriented in the front-rear direction of the vehicle body, the meter device can be easily seen even when the driver of the motorcycle 1 is lying down.

As described above, according to the top bridge structure of the present invention, in a side view of the vehicle body with the top bridge 50 attached to the vehicle body, the upper portion of the front end of the top bridge 50 is provided with the chamfered portion 55 oriented substantially horizontally. Therefore, the thickness of the front side of the top bridge 50 can be reduced to reduce the weight while ensuring sufficient rigidity of the top bridge 50 . In addition, even when the driver is lying down, the upper part of the top bridge 50 is chamfered so that the meter device 60 arranged in front of the top bridge 50 can be easily seen.

The form of the motorcycle, the shape and structure of the top bridge, the shape and area of the chamfered portion, the angle of the chamfered portion, and the like are not limited to those in the above embodiment, and various modifications are possible. The top bridge structure according to the present invention can be applied not only to motorcycles, but also to straddle-type three-wheeled vehicles, four-wheeled vehicles, and the like.

DESCRIPTION OF SYMBOLS 1... Motorcycle (straddle-type vehicle) 15... Front fork 50... Top bridge 51... Stem clamp part 52... Through hole 53... Fork clamp part 54... Support hole 55... Chamfered part 56... front end, 60... meter device

Claims (3)

In a straddle-type vehicle (1) having a top bridge (50) supporting positions near the upper ends of a pair of left and right front forks (15),
A chamfered portion (55) oriented in a substantially horizontal direction is provided at an upper portion of the front end of the top bridge (50) in a side view of the vehicle body with the top bridge (50) attached to the vehicle body. Saddle-type vehicle. A straddle-type vehicle according to claim 1, wherein a meter device (60) is arranged in front of said top bridge (50). The top bridge (50) is provided with a pair of left and right support holes (54) through which the front forks (15) pass,
The straddle-type vehicle according to claim 2, wherein the chamfered portion (55) extends in the vehicle width direction to a position overlapping with the support hole (54) when viewed from the front of the vehicle body.

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