JP3571316B2 - Motorcycle - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a mechanism for mounting a tandem seat and a backrest sheave of a motorcycle, and stably supports the tandem seat and a backrest sheave to the bracket without extending a bracket of a vehicle body frame backward. Can be done.
[0002]
[Prior art]
Conventionally, motorcycles provided with tandem seats are known.However, in this type of conventional motorcycle, a bracket of a body frame is extended to a region of a rear fender, and a tandem seat and a seabar for a backrest are attached thereto. . For this reason, the overall length of the body frame is increased. On the other hand, there is a problem that the handleability of the body frame in the work of processing the body frame and the assembling work of the motorcycle is worse as the total length is longer.
[0003]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION It is an object of the present invention to devise an attachment and support mechanism for a tandem seat and a backrest sheave bar so that the bracket can be stably attached to the bracket without extending a bracket of a vehicle body frame backward. Things.
[0004]
[Means for Solving the Problems]
Means taken to solve the problem is that a rider seat is provided on the upper part of the seat rail from a seat rail at a rear portion of a vehicle frame to a bracket connecting the seat rail and a down tube. Assuming a motorcycle provided with a tandem seat and a seabar for a backrest, the motorcycle is configured by the following (a) to (e).
(B) A rear fender and a reinforcing bracket, which is provided inside the rear fender and extends rearward to the vicinity of the main body of the seabar for the backrest, are provided at the rear end of the bracket at the rear end of the frame and the front end thereof. Bolted,
(B) below the main body of the backrest sheave bar, leg portions are provided integrally extending over the rear fender and branching left and right, each extending in the front-rear direction of the vehicle;
(C) attaching the front part of the sea sheather to the rear end of the bracket;
(D) disposing the tandem sheet above the rear fender;
(E) The main body of the sheave bar is supported by the reinforcing bracket via the rear fender.
[0005]
[Action]
A rear fender and a reinforcing bracket, which is provided inside the rear fender and has a rear end extending to near the main body of the back-back see- sie bar, are attached to the rear end of the bracket at the rear part of the vehicle body frame and the front part thereof by bolts. Thus, the reinforcing bracket is provided to extend rearward from the bracket. The tandem seat arranged behind the rider seat is arranged above the rear fender, and the reinforcing bracket is provided inside the rear fender, so that the tandem seat is stably supported on the rear fender. I have.
Further, below the main body of the backrest sheave bar, left and right branches are provided so as to straddle the rear fender, and legs are respectively provided integrally extending in the front-rear direction of the vehicle. And the main body of the sheave bar is supported by the reinforcing bracket via the rear fender, so that the sheave bar is stably mounted to the reinforcing bracket via the rear fender.
Therefore, the tandem seat and the backrest are stably supported by the bracket at the rear of the vehicle body frame .
[0006]
【Example】
In FIG. 1, reference numeral 1 denotes a motorcycle main body, and a front fork 4 is pivotally supported on a head pipe 3 of a body frame 2 of the motorcycle. A front wheel 5 is supported at a lower part of the front fork 4, and a handle 6 is supported at an upper part. The body frame 2 includes a head pipe 3, a main frame 7 extending from the head pipe 3 toward the rear of the vehicle body, and a down tube 8. A seat rail 9 is integrally formed at a rear portion of the main frame 7. I have. The rear portion of the seat rail 9 and the down tube 8 are connected by a bracket 10, and a support stay 11 is provided between the main frame 7 and the down tube 8.
An engine 12 is mounted in a space defined by the main frame 7, the down tube 8, and the support stay 11 via three brackets 13. The engine 12 is provided with a fuel tank 14 disposed above the engine 12. Fuel is supplied via the carburetor 15.
A rear arm 16 is rotatably supported at the connection between the down tube 8 and the support stay 11, and a rear wheel 17 is supported on the rear arm 16. The rear end of the rear arm 16 is supported by the bracket 10 via a suspension 18.
A rear fender 19 and a see-siever 22 according to the support member of the present invention are supported at the rear of the bracket 10. A seat (rider seat) 20 extends from the seat rail 9 to the bracket 10, and a tandem seat 21 is provided above the rear fender 19. Are located.
[0007]
The rear fender 19 is formed by molding a sheet metal press member or the like into a shape along the upper portion of the rear wheel 17. Inside the rear fender 19, there is provided a reinforcing bracket 23 having a rear end extending to near the main body 22 b of the backrest sheather 22. (See FIG. 2) .
Further, the see-siever 22 is formed by integrally providing a leg 22c which branches left and right below a main body 22b provided with a cushion 22a for a backrest so as to straddle the rear fender 19 and extends in the front-rear direction of the vehicle. The leg member 22c is fastened to the rear fender 19 and the reinforcing bracket 23 together with a fixing member such as a bolt (not shown) at an appropriate position in a portion that straddles the leg, and the leg portion 22c is also fixed to the rear fender 19 or the like at an appropriate position. I have. Since the sheave bar 22 is subjected to a large load due to its use for the backrest, it is made of a relatively rigid material.
The bracket 10 is provided with mounting portions 24 and 25 near the center and the rear end thereof, and the mounting portion 24 near the center is provided with a mounting boss 24a. The mounting boss 24a has a rear fender 19 and a reinforcing bracket 23 fastened together by bolts 26 on one side, and a rear suspension 18 fastened to the other side by bolts 26a (see FIG. 3; FIG. It is AA sectional drawing.). Further, as shown in FIG. 4 (a cross-sectional view taken along the line BB in FIG. 2), the rear fender 19, the reinforcing bracket 23, the leg 22c of the sheather 22 and the collars 25a and 25b are provided on the mounting portion 25 at the rear end of the bracket 10. The rear fender 19 and the reinforcing bracket 23 are fixed to the bracket 10 by the two mounting portions 24 and 25 described above.
[0008]
A rear flasher 30 is provided at a lower rear portion of the rear fender 19 via a bracket 31. As shown in FIG. 5 (a cross-sectional view taken along the line CC in FIG. 2), the bracket 31 is rigidly fixed to the rear fender 19 with bolts 32 and nuts 32a, and the rear flasher 30 is fixed to the bracket 31. In the figure, reference numeral 34 denotes a wiring connected to the rear flasher 30, and reference numerals 35 and 36 denote clamping positions where the wiring 34 is attached to appropriate portions of the bracket 31 and the rear fender 19.
A rubber shell-shaped elastic member 33 is interposed between the bracket 31 and the leg portion 22c of the sheath bar 22 to suppress the bracket 31, that is, the lower portion of the rear fender 19 from vibrating in the left-right direction of the motorcycle body 1. I have. Since the shell-shaped elastic member 33 has a conical shape, as the load applied thereto increases, the tip end (that is, the tapered portion) is deformed to increase the overall hardness, making it difficult to bend, Conversely, when the load is reduced, the overall hardness is reduced, and it has a characteristic that it is easily bent. Therefore, the spring constant for the bracket 31 can be changed without changing the elastic member only by changing the distance between the bracket 31 and the leg 22c of the sheath bar 22 in FIG.
[0009]
The rear fender 19 is formed by a sheet metal press member as described above, and the position where the bracket 31 of the rear flasher 30 is attached is separated from the reinforcing bracket 23, so that the rear fender 19 receives the vibration of the engine 12 transmitted from the vehicle body frame 2 and vibrates. In particular, when the natural vibration frequency of the rear fender 19 and the vibration frequency of the engine 12 match, and the rear fender causes a resonance phenomenon, the lower portion vibrates largely in the left-right direction of the vehicle. According to the structure, the see-siever 22 and the bracket 31 for the rear flasher 30 rigidly fixed to the rear fender 19 have a relatively high rigidity due to being used as a backrest or the like and having a different natural vibration frequency from the rear fender 19. Is provided with an elastic member 33, and a rear flasher is Since the zero bracket 31 is directly suppressed, even when the natural vibration frequency of the rear fender 19 and the vibration frequency of the engine 12 match, the lower part of the rear fender 19, that is, the mounting portion of the bracket 31 of the rear flasher 30 has a resonance phenomenon. As a result, there is no large vibration in the left-right direction of the vehicle.
[0010]
In the present embodiment, the see-sie bar 22 used as a backrest on the support member can be changed to, for example, a grab bar for holding a luggage carrier or a tandem rider.
[0011]
Further, the vibration preventing structure of the present embodiment prevents the vibration of the rear flasher 30 by interposing the elastic member 33 between the bracket 31 of the rear flasher 30 fixed to the rear fender 19 and the sheave bar 22. The mounting portion of the rear flasher according to the present invention is not limited to this embodiment, and may be any portion in the vicinity where the rear flasher is mounted, as long as the vibration transmitted to the rear flasher can be absorbed through an elastic body. It is a matter of course that the structure may be such that the elastic member is interposed between the rear fender and the sheave bar to directly prevent the vibration of the rear fender, thereby preventing the vibration of the rear flasher.
[0012]
【The invention's effect】
The rigidity of the rear fender 19 is increased by the reinforcing bracket 23, and at the same time, it is not necessary to project a special support portion rearward from the frame for supporting the tandem seat 21, that is, to extend the frame rearward.
The reinforcing bracket 23 is fixed to the bracket 10, and the left and right integrated leg portions 22 c of the sheath bar 22 are supported by the reinforcing bracket 23. That is, the reinforcing bracket becomes like extending from the bracket 10, it is possible to stably hold attach the tandem seat 21 in the upper portion of the rear fender.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a motorcycle employing a structure for preventing vibration of a rear flasher according to the present invention.
FIG. 2 is a schematic partial enlarged view showing details of a rear part of the motorcycle of FIG. 1;
FIG. 3 is a sectional view taken along line AA of FIG. 2;
FIG. 4 is a sectional view taken along line BB of FIG. 2;
FIG. 5 is a sectional view taken along the line CC of FIG. 2;
6 (a) and 6 (b) are schematic diagrams of a rear flasher showing a conventional anti-vibration structure of the rear flasher.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Motorcycle main body 2 ... Body frame 3 ... Head pipe 4 ... Front fork 5 ... Front wheel 6 ... Handle 7 ... Main frame 8 ... Down tube 9 ... Seat rail 10 Bracket 11 Support stay 12 Engine 13 Bracket 14 Fuel tank 15 Carburetor 16 Rear arm 17 Rear wheel 18 Suspension 19 ... rear fender 20 ... seat (rider seat)
21: Tandem sheet 22: Sheave bar 23: Reinforcement bracket 24: Mounting part 24a: Mounting boss 25: Mounting part (rear end)
26 ... bolt 26a ... bolt 27 ... bolt 30 ... rear flasher 31 ... bracket 32 ... bolt 32a ... nut 33 ... elastic member 34 ... wiring 35 ... Clamp position 36 Clamp position 60 Rear flasher 61 Stay 62 Elastic body 63 Rear flasher 64 Grommet 65 Rear fender

Claims (1)

From the seat rail at the rear of the vehicle frame to the bracket connecting the seat rail and the down tube, a rider seat is provided above them, and a tandem seat and a seabar for the backrest are provided behind the rider seat. In motorcycles,
A rear fender and a reinforcing bracket, which is provided inside the rear fender and has a rear end extending to the vicinity of the main body of the backrest siever, are attached to the bracket at the rear portion of the frame by bolts at two positions, a rear end portion and a front portion thereof. ,
Below the main body of the backrest siever, a left and right branch is provided so as to straddle the rear fender, and each leg is integrally provided to extend in the front-rear direction of the vehicle,
Attach the front of the see-sie bar to the rear end of the bracket,
The tandem seat is disposed above the rear fender,
The motorcycle according to claim 1, wherein a main body of the sheath bar is supported by the reinforcing bracket via the rear fender.

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