JPS6358149B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rear fender device for a motorcycle equipped with a unit swing type power unit.

[Conventional technology]

For example, in small motorcycles called scooters or family bikes, the frame member that makes up the vehicle body is bent significantly downward between the handlebar and the seat.In other words, the lower end of the frame member that extends diagonally downward from the head pipe is bent rearward. The rear end of this horizontal portion is raised up, and a seat is attached to this raised end. A unit swing type power unit is provided below the seat, and includes an engine and a transmission case that extends rearward from one side of the engine and supports the rear wheels at its rear end. The area from around the engine to below the seat is surrounded by a pair of left and right side covers.

By the way, in this type of motorcycle, the rear end of the power unit is suspended by a hydraulic shock absorber, so for example, due to the styling design of the side cover, this side cover may be placed in a limited area below the seat. If the side cover is kept within this range, not only the connecting portion between the hydraulic shock absorber and the power unit but also the rear wheel will be exposed to the outside without being covered by the side cover. For this reason,
Even though the motorcycle is a covered type motorcycle in which the engine area is hidden, if the complicated structural parts around the rear wheel are exposed, this causes problems and makes the appearance undesirable.

Therefore, as a countermeasure to this problem, a rear fender that covers the upper part of the rear wheel is installed continuously on the rear surface of the cover.
It is conceivable that the rear fender may also cover the connection point between the power unit and the hydraulic shock absorber.

[Problem to be solved by the invention]

However, if the rear fender is provided continuously with the cover, while the vehicle is running, mud kicked up by the rear wheels, water on the road surface, etc. will be carried forward along the inner surface of the rear fender and will enter the cover. Then,
Since the engine is housed within this cover, located just in front of the rear wheels, there is a problem in that mud and sewage adhere to the engine, making the area around the engine more likely to get dirty.

In addition, if the dimensional accuracy of the side cover or rear fender is poor, or if there is an error in the mounting part of these side covers and rear fender, a gap may occur in the continuous part of the side cover and rear fender, or conversely, there may be a gap between the side cover and rear fender. are interfering with each other,
There was a risk of distortion and deformation, and there was room for improvement in terms of appearance.

Therefore, the present invention provides a rear fender device for a motorcycle that can prevent dirt around the engine, prevent gaps from forming in the continuous portion of the cover and the rear fender, and conversely prevent interference with each other, and has a good appearance. The purpose is to provide.

[Means to solve the problem]

Therefore, in the present invention, below the sheet,
A unit swing type power unit is provided, consisting of an engine and a transmission case extending rearward from one side of the engine and supporting a rear wheel at the rear end.
A pair of side covers that are divided into left and right sides surround the area from the engine area of the power unit to between the seats, and a notch is provided in the rear wall of these side covers that abut each other. The front part of the rear fender that covers the upper part of the rear wheel is inserted, and the front end of the rear fender inserted into the side cover is provided with an end wall extending in the vertical direction.

[Effect]

According to this configuration, since there is an end wall extending in the vertical direction at the front end of the rear fender located inside the cover, even if mud, sewage, etc. kicked up by the rear wheels are carried forward along the inner surface of the rear fender. Even if dirt or sewage falls, it hits the end wall and is prevented from penetrating into the cover. Therefore, even though the rear fender is connected to the side cover, mud, sewage, etc. are less likely to adhere to the engine, and staining around the engine can be prevented.

In addition, since the front end of the rear fender is inserted into the notch in the side cover, even if the side cover and rear fender have poor dimensional accuracy or an installation error occurs, there will be a gap between the side cover and rear fender. This eliminates interference between the side covers and the rear fender, and it is possible to maintain a good appearance of the continuous portion between the side cover and the rear fender.

〔Example〕

The present invention will be explained below based on an embodiment shown in the drawings.

Reference numeral 1 in the figure indicates a vehicle body, and this vehicle body 1 has a steering head pipe 2 as shown in FIG.
It is constructed by joining a downwardly extending front pipe 3 to the rear surface, and joining left and right rear pipes 4 to the lower ends of this front pipe 3. The rear pipe 4 has a horizontal front end portion, and the rear end forms a rising portion 6 extending diagonally upward from the horizontal portion 5. As shown in FIG. 1, a step board 7 is provided on the horizontal portion 5, so that the vehicle body 1 constitutes an underbone frame.

A steering shaft 8 is rotatably supported on the steering head pipe 2. A front wheel 10 is attached to the lower end of the steering shaft 8 via a front fork 9, and the front fork 9 is steered by a handle 11.

In addition, a leg shield 12 is attached to the front pipe 3 as shown in FIG.
A seat 13 is attached to the upper end of the rear pipe 4, and a fuel tank and an oil tank (not shown) are installed below this seat 13.

A unit swing type power unit 20 is arranged below the seat 13, the fuel tank, and the oil tank. This power unit 20
includes an engine 21 and a transmission case 22 integrated with a crankcase 21a of the engine 21. The transmission case 22 extends rearward from one end of the crankcase 21a of the engine 21, and a power transmission means such as a V-belt is accommodated within the transmission case 22. The front end of the power unit 20 is swingably connected to a bracket 23 provided on the rear pipe 4 via a pivot 24, and the rear end of the transmission case 22 is rotatably driven by the V-belt. One end of the rear wheel shaft 25 is supported. The rear wheel shaft 25 has a rear wheel 26
is attached, and an engine 21 is located just in front of this rear wheel 26.

A rear arm 27 spans between the upper rear end of the transmission case 22 and the other side of the crankcase 21a on the opposite side of the transmission case 22. That is, the rear arm 27 has a bolt 2 attached to the upper rear end of the transmission case 22 as shown in FIG.
8, and a second arm 3 connected to the other end of the crankcase 21a via a bolt 30, as shown in FIG.
1. A bracket 32 is provided at the upper end of the first arm 29, as shown in FIGS. 6A to C, and another bracket 33 is welded to the upper end of the second arm 31. A pipe-shaped cross member 34 is welded between both brackets 32 and 33.
Therefore, the first arm 29 and the second arm 3
1 and are integrally joined to each other via a cross member 34.

The brackets 32 and 33 have cylindrical bosses 35.
a, 35b are welded, and these bosses 35
The lower end of a hydraulic shock absorber 37 is rotatably supported between a and 35b via a support shaft 36. The hydraulic shock absorber 37 is located approximately on the center line of the vehicle body 1, and its upper end is connected to the rear pipe 4.
That is, as shown in FIG. 5, brackets 39 are welded to the left and right rear pipes 4, and the upper end of the hydraulic shock absorber 37 is interposed between these brackets 39, and is connected via bolts 40 and nuts 41. It is rotatably supported. Therefore, the hydraulic shock absorber 37 is vertically placed approximately on the center line of the vehicle body in a slightly forward-leaning posture.

Further, a support arm 42 is provided on the opposite side of the transmission case 22 that holds the rear wheel 26 therebetween. A bracket 43 is provided at the upper end of the support arm 42. As shown in FIG. 2, this bracket 43 is detachably attached to the bracket 33 via a bolt 44, and a hollow cylindrical boss 45 is provided at the lower end of this support arm 42. As shown in FIG. 5, the other end of the rear wheel shaft 25 is rotatably and removably inserted into the boss 45, and the other end of the rear wheel shaft 25 is inserted into the nut 4.
By tightening the screws 6 to 6, they are held in place by the boss 45 to prevent them from coming off. Therefore, the rear wheel shaft 25 is supported at both ends between the transmission case 22 and the support arm 42.

By the way, the engine 2 of the power unit 20
The range from the first rotation to the bottom of the seat 13 is
It is surrounded by an upper cover 47, a pair of left and right side covers 48, and a front cover 49. As shown in FIG. 10, the side covers 48 are abutted from the left and right sides, and are removably attached to the vehicle body 1, respectively. When these side covers 48 are abutted against each other, the hydraulic shock absorber 37
The hydraulic shock absorber 37 is provided with a rear wall 50 that covers the connecting portion between the rear pipe 4 and the rear pipe 4 from the rear, and a through hole 51 through which the upper end of the hydraulic shock absorber 37 passes is formed at the abutting edge of the rear wall 50. There is.

Further, at the lower part of the rear wall 50 of both side covers 48, there is a notch 52 that opens into the cover 48.
is formed. This notch 52 is open over its entire width when the side covers 48 are in abutment state, and is located below the through hole 51 and in front of the upper part of the rear wheel 26.

Note that a projection 5 is provided at the abutting edge of one rear wall 50.
3 is formed, and the other rear wall 50
A recess 54 into which the protrusion 53 can fit is formed in the abutting edge of the side cover 48, and by fitting these protrusions 53 and the recess 54, the abutting portion of the side cover 48 is positioned. .

On the other hand, a rear fender 55 is provided in the upper half of the rear arm 27 as described above. The rear fender 55 is made of, for example, a synthetic resin material, and has an inverted U-shaped cross section so as to cover the upper part of the rear wheel 26 and the upper part of the rear arm 27. This rear fender 55 is located in the first position relative to the rear arm 27.
It is fixed via a fender stay 56.
The first fender stay 56 has a U-shape with an open front when viewed from above, and its front end is fixed to the brackets 32 and 33 of the rear arm 27 via bolts 57. The rear fender 55 is disposed so as to cover the outside of the first fender stay 56, and is fixed to the first fender stay 56 via a screw 58.

In addition, at the upper end of the rear arm 27, there is a
As shown, a bracket 60 is welded to the bracket 60, and a second fender stay 61 is fixed to the bracket 60. As shown in FIG. 7, a bar 62 made of a wire bent downward into a U-shape is attached to the upper surface of the second fender stay 61, and the front end of the rear fender 55 is
It is fixed to this second fender stay 61 via a screw 63.

In the rear fender 55 fixed to the rear arm 27 in this manner, the lower end of the hydraulic shock absorber 37 passes through the upper wall of its front end.
The connection point between the hydraulic shock absorber 37 and the rear arm 27 is also covered by the rear fender 55. When the rear fender 55 is penetrated by the hydraulic shock absorber 37, it is necessary to escape through the passage of the hydraulic shock absorber 37 in order to attach and detach the rear fender 55. Therefore, in the case of this embodiment, the rear fender 55 is moved forward and backward. It is divided into two parts.

That is, as shown in FIGS. 4 and 8, the rear fender 55 includes a fender main body 55a located behind the penetrating portion of the hydraulic shock absorber 37, and a hydraulic shock absorber 37 continuous to the front end of the fender main body 55a.
It is divided into a mat guard 64 located in front of the penetrating portion. The mudguard 64 is made of a synthetic resin material, and has a shape that matches a U-shaped cutout hole 65 formed in the upper front surface of the fender main body 55a, as shown in FIG. The hydraulic shock absorber 37 is inserted between the opening edge of the notch hole 65 and the front edge of the mudguard 64, and the through hole 66 through which the hydraulic shock absorber 37 passes is defined by these edges. It is shaped.

As shown in FIGS. 8 and 9, an overlapping flange portion 67 is formed at the peripheral edge of the mudguard 64, and this overlapping flange portion 67 is formed in the notch hole 65.
It is superimposed on the lower surface of the inner peripheral edge of. Further, as shown in FIG. 4, a gripping piece 68 is formed on the back surface of the mudguard 64, and this gripping piece 68 is fitted onto a bar 62 attached to the second feather stay 61. An end wall 69 extending downward is integrally formed at the front end edge of the mud guard 64 and the fender main body 55a. A pair of left and right support walls 70 are erected on this end wall 69, and the support walls 70 are fastened and fixed to the second fender stay 61 together with the fender main body 55a via screws 63.

The front end of such a rear fender 55 is connected to the first
As is clear from the relationship between the drawings and FIG. As shown in FIG.
6 and the engine 21 along the vertical direction.

In addition, the fender main body 55a and the muzzle guard 64
A seal ring 71 made of rubber is fitted into the opening edge of the through hole 66 formed by the above, and the inner circumferential surface of this seal ring 71 is in close contact with the outer circumferential surface of the hydraulic shock absorber 37 .

Further, reference numeral 72 in FIGS. 2 and 3 indicates a muffler, and this muffler 72 is attached to the engine 21 via bolts 73.

According to such a configuration, a cutout 52 is provided in the rear wall 50 of the side cover 48 that covers the area around the engine 21 and also covers the connection point between the hydraulic shock absorber 37 and the rear pipe 4. The front end of the rear fender 55 is inserted, and the engine 21 is inserted into the front end of the rear fender 55.
Since the vertical end wall 69 is provided between the rear wheel 26 and the rear wheel 26, even if mud, sewage, etc. kicked up by the rear wheel 26 are carried forward along the inner surface of the rear fender 55, This mud, sewage, etc. will fall against this end wall 69 as shown by the arrow in FIG. 4, and will be prevented from entering the inside of the side cover 48 in front of the rear fender 55. .

Therefore, even though the rear fender 55 is connected to the side cover 48, mud, sewage, etc. are less likely to adhere to the engine 21, and the area around the engine 21 can be prevented from becoming dirty.

Furthermore, since the front end of the rear fender 55 is inserted into the notch 52 of the side cover 48, even if the dimensional accuracy of the side cover 48 and the rear fender 55 is poor or an installation error occurs, the side cover 48 and the rear fender There is no possibility that a large gap will occur in the continuous portion with 55, or that they will interfere with each other. Therefore, the side cover 48
This increases the sense of unity between the rear fender 55 and the rear fender 55, and maintains a good appearance.

〔Effect of the invention〕

According to the present invention described in detail above, even if the mud, sewage, etc. rolled up by the rear wheels are carried forward along the inner surface of the rear fender, this mud, sewage, etc. will not hit the end wall at the front end of the rear fender. Since the rear fender is prevented from falling and entering the inside of the cover, dirt around the engine can be prevented even though the rear fender is connected to the side cover. In addition, even if the side covers and rear fenders have poor dimensional accuracy or installation errors, there is no risk of creating gaps between the side covers and rear fenders, or conversely they will interfere with each other, resulting in a good appearance. There is an advantage in that it can be kept.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side view showing the entire motorcycle, FIG. 2 is a side view of the vehicle body as seen from the opposite side, FIG. 3 is a rear view of the rear wheel portion, Figure 4 is a sectional view of the rear fender part, Figure 5 is a sectional view taken along the line - in Figure 4, Figures 6 A to C show the structure of the rear arm, A is a side view, and B
is a sectional view taken along line B-B in Figure 6A, C is a sectional view taken along line C-C in Figure 6A, Figure 7 is a front view of the second fender stay, and Figure 8 is the entire rear fender. 9 is a sectional view taken along the line - in FIG. 8, and FIG. 10 is a rear view of the side cover. 13... Seat, 20... Power unit, 21
... Engine, 22 ... Transmission case, 26 ... Rear wheel, 48 ... Side cover, 50 ... Rear wall, 5
2...Notch, 55...Rear fender, 69...
...end wall.

Claims (1)

[Claims] 1. A unit swing type power unit is provided below the seat, consisting of an engine and a transmission case that extends rearward from one side of the engine and supports the rear wheels at the rear end, and the seat is connected from around the engine of this power unit. A pair of side covers that are divided into left and right sides surround the area between them, and a cutout is provided in the rear wall of these side covers that abuts each other. and the front end of the rear fender inserted into this side cover.
A rear fender device for a motorcycle, characterized in that an end wall extending in the vertical direction is provided.