JPH05221362A - Engine cover device for motorcycle - Google Patents

Abstract

PURPOSE:To protect a link mechanism from snow, ice, muddy water and an obstacle or the like by extending rearward the rear part of an engine cover for covering the bottom of an engine, and covering the bottom of the link mechanism. CONSTITUTION:A lower cover 100 is manufacture from metal of aluminum plate or the like excellent in impact resistance, to cover the front lower part of an exhaust pipe 74 from below by a front part of the lower cover 100 on the other hand to extend its rear part to the bottom of a link mechanism 40 raised up behind it, and the link mechanism 40 is protected from an obstacle on a road surface or snow, ice, muddy water, etc., flung up by a rear wheel 36. A rear car body cover 62, front car body cover 90, side surface cover 94, intermediate cover 96 and the lower cover 100 are mounted so as to smoothly continue. Consequently, snow and muddy water are prevented from easily advancing into the lower cover 100.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine cover device applied to a motorcycle having a link type rear wheel suspension device.

[0002]

2. Description of the Related Art In some motorcycles having a link type rear wheel suspension device that supports a rear arm of a rear wheel via a link mechanism, the link mechanism is located below a vehicle body. If this link mechanism is exposed to the lower part of the vehicle body, snow, ice or muddy water will adhere to the link mechanism especially on snow or on bad roads, which will hinder smooth operation and damage it by hitting hard obstacles. It is possible. Therefore, in such a case, it is conceivable to attach a protective plate for protecting the link mechanism.

[0003]

However, the provision of a dedicated protective plate for protecting the link mechanism as described above has a problem that the number of parts increases and the weight increases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the link mechanism can be protected from snow, ice, muddy water, obstacles, etc. without increasing the number of parts, and the weight can be increased. An object of the present invention is to provide an engine cover device for a motorcycle that can be minimized.

[0005]

According to the present invention, an object of the present invention is to mount an engine mounted in the vicinity of the center of a vehicle body between front and rear wheels, a riding type seat arranged obliquely rearward of the engine, and a rear wheel holding member. In a motorcycle including a single cushion unit that supports a rear arm via a link mechanism arranged between the engine and rear wheels, a rear portion of an engine cover that covers the lower side of the engine is extended rearward, This is achieved by an engine cover device for a motorcycle characterized in that the lower part of the link mechanism is covered.

[0006]

1 is a side view of an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a rear view, and FIG. 4 is a side view showing the appearance. Reference numeral 10 denotes a vehicle body frame, which includes one main tube 14 and one down tube 16 extending obliquely rearward from the steering shaft tube 12, and a pair of left and right seat pillar tubes 18, 18 descending from a rear end of the main tube 14. When,
A pair of left and right lower tubes 22 and 22 that gathers with the seat pillar tubes 18 and 18 by a pivot bracket 20 that extends downward from the down tube 16 and a pair of left and right seat rails 24 that extends rearward from the main tube 14.
It has a pair of left and right back tubes 26, 26 connecting the pivot bracket 20 and the seat rail 24.

A front wheel 30 is attached to the lower ends of the pair of front forks 28, 28 held by the steering shaft cylinder 12, and a steering handlebar 32 is attached to the upper ends of the front forks 28, 28. Reference numerals 34 and 34 denote a pair of left and right rear arms, the front ends of which are pivotally supported by the pivot bracket 20, and the rear wheels 36 are held at the rear ends.

Reference numeral 38 is a cushion unit which elastically supports the rear wheel 36. The upper end of the cushion unit 38 is pivotally supported on the rear end of the main tube 14, and the lower end thereof is connected to the rear arm 34 via a link mechanism 40.

The link mechanism 40 includes an engine 46 described later.
Is disposed below the rear wheel 36 and the lower arm 2
A first link 42 having a front end pivotally supported by a pin 41 and a rear end swingable up and down, is provided between the first and second links 42 and 22, and a pair of second links 44 connecting the first link 42 and the rear arm 34. The lower end of the cushion unit 38 is connected to the rear end of the first link 42.

Reference numeral 46 denotes a single-cylinder liquid-cooled two-cycle engine, which is mounted between the lower tube 22 and the seat pillar tube 18. The output of the engine 46 is transmitted to the rear wheels 36 via the chain 48.

The engine 46 has a cylinder 50 standing upright and obliquely upward, and a carburetor 52 is connected to the rear surface thereof. A first air cleaner 54 is disposed between the left and right back tubes 26, 26 behind the cushion unit 38. The first air cleaner 54 and the carburetor 52 are connected to the duct 5 that bypasses the left side of the cushion unit 38.
6 are connected. Elements are housed in the first air cleaner 54.

Numeral 58 is a second air cleaner, which is a rear wheel 36.
Is disposed above the left side of the. That is, the second air cleaner 58 is hung outside the left seat rail 24, and the lower portion thereof is held by the side bar 60 connecting the left back tube 26 and the rear portion of the seat rail 24.

The second air cleaner 58 is formed from an intake box 64 integrally provided on a rear vehicle body cover 62 made of resin to the duct 6
External air is sucked in through the duct 5, and the sucked air is taken in by the duct 6
6 leads to the first air cleaner 54. Here, the intake box 64 has an outside air intake 70 that opens below a tail lamp 68 that protrudes substantially horizontally rearward from the rear portion of the rear vehicle body cover 62, and collects rainwater, snow, or muddy water splashed by the rear wheel 36. It is difficult to suck the air into the intake box 64. Further, an air flow path bent by an appropriate number of walls 65 is formed in the second air cleaner 58, and a rubber cap 72 is attached at an appropriate position. This rubber cap 72 is removable,
By removing this, it is possible to remove the snow that accumulates in this flow path when steering in the snow.

An exhaust pipe 74 is connected to the front surface of the cylinder 50. The exhaust pipe 74 extends from the cylinder 50 to the front lower side, makes a half turn in the counterclockwise direction, and then extends upward. Then, it extends rearward through the right side of the cushion unit 38 via the expansion pipe portion located on the upper right side of the cylinder 50, and is connected to the exhaust muffler 76.

The exhaust muffler 76 is arranged on the upper right side of the rear wheel 36. That is, the muffler 76 is formed in an elliptical shape having a vertically long cross section, an upper portion thereof is attached to the right seat rail 24, and a lower portion thereof is a side bar 78 connecting the right back tube 26 and the seat rail 24.
(See FIG. 3).

The second air cleaner 58 and the muffler 76 are entirely covered laterally by the rear vehicle body cover 62, and the muffler 7
A tail pipe 6 passes through the rear vehicle body cover 62 and projects rearward. Further, in this embodiment, a sound insulating plate 80 is attached between the rear wheel 36 and the second air cleaner 58, and a heat insulating plate 82 is attached between the muffler 76 and the muffler 76 (FIG. 3). Therefore, the intake noise of the second air cleaner 58 is unlikely to leak to the outside, and is also suitable for keeping the muffler 76 warm and sound-insulating. In particular, when the exhaust purification measures such as a catalyst are applied to the muffler 76, the purification action can be promoted by keeping the muffler 76 warm.

Reference numeral 84 denotes a vertically long radiator with an electric fan, which is vertically mounted on the left rear side of the steering shaft tube 12.
The coolant of the engine 46 circulates in the radiator 84. 86 is a fuel tank. The fuel tank 86 is attached so as to straddle the main tube 14, and a recess 88 for accommodating the radiator 84 is formed on the front lower surface on the left side thereof.

Reference numeral 90 denotes a resin front vehicle body cover which covers the periphery of the steering shaft cylinder 12 from the fuel tank 86 radiator 84 to the vicinity of the cylinder 50. Here, above the steering handlebar 32 is a tank cover 92 which can be opened and closed upward, and is opened to refuel. Reference numeral 94 denotes a resin side cover that covers the side of the engine 46 and the vicinity of the pivot bracket 20 from the front of the cylinder 50.

Reference numeral 96 denotes a removable resin intermediate cover, which covers the side of the carburetor 52. An air exhaust port 98 for guiding the traveling wind passing through the radiator 84 to the outside is opened in the intermediate cover 96 so as to be directed rearward. This exhaust port 98
The carburetor 52 can be adjusted from the above, and the vicinity of the carburetor 52 can be easily maintained by removing the intermediate cover 96.

Reference numeral 100 denotes a lower cover formed in a substantially bowl shape so as to cover the lower side of the engine 46 and serves as the engine cover of the present invention. The lower cover 100 is made of a metal such as an aluminum plate having excellent impact resistance, and its front portion covers the front lower portion of the exhaust pipe 74 from below, while its rear portion extends below the link mechanism 40 and extends to the link mechanism 40. It rises up behind and protects the link mechanism 40 from obstacles on the road surface or snow, ice, muddy water, etc. cast by the rear wheel 36.

These rear vehicle body cover 62 and front vehicle body cover 9
0, side cover 94, middle cover 96 and lower cover 1
00 is mounted so as to be smoothly continuous. Therefore, it is difficult for snow and mud to enter the lower cover 100.

Reference numeral 102 designates a long, front-rear straddle-type operation seat located obliquely rearward of the engine 46, and is attached to the seat rail 24. The front portion of the driving seat 102 is smoothly continuous to the front vehicle body cover 90, and the rear portion and the side edge thereof are smoothly continuous to the rear vehicle body cover 62. 1
Reference numeral 04 denotes a pair of left and right footrests.

In this embodiment, the lower cover 100, which is the engine cover, is made of a metal that is strong against impact, but the present invention may be made of synthetic resin. Also, the side cover 94
Since the lower cover 100 is continuously connected to the lower cover 100, it is difficult for snow and mud to enter the lower cover 100 and it is also suitable for noise prevention, but the present invention does not have the side cover 94, that is, Includes open tops.

[0024]

As described above, according to the present invention, since the rear portion of the engine cover is extended rearward to cover the lower part of the link mechanism, the link mechanism can be protected without increasing the number of parts. Further, the increase in weight can be suppressed to a minimum as compared with the case where a member for protecting the link mechanism is separately attached.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a plan view of the same.

[Figure 3] Similarly, rear view

FIG. 4 is a side view showing the appearance.

[Explanation of symbols]

 34 Rear Arm 36 Rear Wheel 38 Cushion Unit 40 Link Mechanism 46 Engine 100 Lower Cover as Engine Cover 102 Driving Seat

Claims (1)

[Claims] 1. An engine mounted near the center of a vehicle body between front and rear wheels, a straddle-type driving seat disposed obliquely above and behind the engine, and a rear arm for holding a rear wheel, the engine and the rear wheel. Supported through a link mechanism arranged between
A motorcycle including a book cushion unit, wherein a rear portion of an engine cover that covers a lower portion of the engine is extended rearward to cover a lower portion of the link mechanism.