JPH0825489B2 - Seat mounting structure for motorcycles - Google Patents

Description

TECHNICAL FIELD The present invention relates to a seat mounting structure for a motorcycle (including a saddle type motorcycle and a four-wheeled vehicle).

(Prior Art) In a conventional motorcycle, a vehicle body frame disposed between front and rear wheels includes a frame front portion and a frame rear portion, and the frame front portion can steer an upper front fork for front wheel suspension. The rear portion of the frame extends rearward from the head pipe that supports the rear pipe, and the rear portion of the frame includes a rear fork for supporting rear wheels and a seat rail that is connected to the front portion of the frame to support the seat. Further, a fuel tank is arranged on the upper part of the front part of the frame, and a seat is provided from the rear end of the fuel tank to the rear. This seat had a structure in which the front portion was attached to the rear end portion of the fuel tank and the rear portion was attached to the seat rail.

(Problems to be Solved by the Invention) However, in the conventional motorcycle seat mounting structure, since the fuel tank is provided in the upper part of the front part of the frame, the seat can be provided only behind the fuel tank. The length of the front part of the seat was limited, and it was not possible to secure the required length. By the way, since the rider's posture changes back and forth during off-road driving, the seating position of the seat frequently moves back and forth, and the front part of the seat must be lengthened to a position near the upper part of the front part of the frame where the fuel tank is installed. It is desirable to form.

Further, since the front portion of the seat has a mounting structure that is mounted to the rear end portion of the fuel tank, there is a possibility that both mounting portions may be displaced. In other words, while the fuel tank is attached to the front part of the frame, the front part of the seat is attached to the rear end part of the tank, and the rear part of the seat is attached to the seat rail. As a result, the displacement of the mounting portion of the fuel tank from the seat increases, and as a result, there is a problem that the work of mounting the seat is troublesome.

Therefore, an object of the present invention is to provide a seat mounting structure for a motorcycle, in which the front part of the seat can be formed to extend over the front part of the frame and the workability of assembling the seat can be improved.

(Means for Solving Problems and Actions Thereof) The seat mounting structure of the present invention is connected to the front part of the frame from the upper part of the frame front part extending rearward from the head pipe supporting the front fork for front wheel suspension, The seat is arranged over the upper part of the rear part of the frame having the seat rail extending to, the fuel tank is arranged below the front part of the frame, and the upper surface of the front part of the frame and the bottom surface of the front part of the seat face each other. The front bottom surface of the seat is directly attached to the upper surface of the frame front portion through an engaging member and an engaging piece that engage with each other, while the rear portion of the seat is fixed to the seat rail.

Therefore, since the front portion of the seat can be formed to extend above the front portion of the frame, it is possible to sufficiently cope with off-road and the front portion of the seat can be directly mounted on the front portion of the frame, so that the seat can be easily assembled. .

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view of a motorcycle, and FIGS. 2 and 3 are a side view and a plan view of a vehicle body frame.

1 to 3, (1) is a motorcycle,
(2) is a front wheel, (3) is a front fender, (4) is a rear wheel, (5) is a rear fender, (6) is an engine,
The engine (6) is supported by a body frame (7) arranged between the front and rear wheels (2) and (4). Also,
The front wheel (2) is steerably supported by the left and right front forks (8) and the head pipe (9) of the vehicle body frame (7), and the rear wheel (4) is vertically swingably supported by the rear fork (11). Has been done. Incidentally, (12) in the figure is a handle.

The body frame (7) includes a frame front part (14) extending above the engine (6) and rearward from the head pipe (9), and a frame rear part (15) connected to the frame front part (14). It is configured.

The frame front part (14) is composed of one upper frame (16) and left and right lower frames (17). The upper frame (16) extends obliquely rearward from the upper portion of the head pipe (9) as shown in FIG. 2, and extends rearward along the vehicle width center as shown in FIG. The lower frame (17) extends diagonally rearward from the lower part of the head pipe (9) to the left and right as shown in FIG. 2, and is arranged substantially symmetrically as shown in FIG. It extends toward one side and curves and extends linearly rearward.

A center member (18) is connected to the rear end of the upper frame (16) by a bolt through a side plate (19) as shown in FIG. 3, and the center member (18) is downward from the lower part and outward of the vehicle body. Extends to the left and right, and this extension (18a, 18b)
The connecting parts (18b, 18b) that incline downward and rearward from the left side extend from the right and left lower frames (17, 17) to the left and right extending parts (18a, 18a). There is.

The frame rear portion (15) is composed of a center member (18), a rear fork (11), an engine hanger (19, 19), a seat rail (20, 20), and the like, and a connecting portion (18b) of the left and right center members (18). , 18b) has a rear fork (11) that pivotally supports a rear wheel (4) via a pivot bearing so that the rear fork (11) can swing, and the left and right connecting portions (18b, 18b) can be connected to the left and right from the bottom. The engine hangers (19) are connected to the lower portions of the extending portions (18a, 18a), respectively. In the figure,
(22) is an air cleaner, (23) is an intake pipe, (24) is an exhaust pipe, and (25) is a muffler.

Further, the seat rails (20, 20) are composed of left and right pipes extending from the upper portion of the center member (18) to both sides of the upper portion of the rear fender (5) and slightly inclined rearward and upward.
The front end portion is connected to the center member (18) or the side plate (19) by bolts. Further, the left and right back pipes (27, 27) extend obliquely forward and downward from the rear end side of each seat rail (20, 20), and the lower end portions of these back pipes (27, 27) are The center members (18) are respectively connected to the connecting portions (18b, 18b). The muffler (25) is supported by the rear end of the left seat rail (20, 20). Further, as shown in FIG. 3, the left and right seat rails (20) and (20) are connected to each other by a diagonal cross pipe (28) having a predetermined angle with respect to the vehicle width center line when viewed from the front side. The rear side is connected by a cross member (29) curved upward. Bolt mounting portions (29a, 29a) for mounting the seat (38), which will be described later, are provided on both sides of the cross member (29), and the seat rail (from the upper portion of the upper frame (16) of the frame front portion (14) 20, 20) A seat (38) is arranged over the upper part.

In addition, the upper frame (16) of the frame front (14)
A fuel tank (30) is arranged in the space between the left and right lower frames (17, 17). This fuel tank (30)
Is a recess (31) extending in the front-rear direction as shown in FIG.
Is provided in the center of the upper part and is formed in a substantially concave cross section.
An upper frame (16) is disposed in the recess (31) through an elastic material (32), and a mounting piece (33) protruding from the front end of the bottom surface of the recess (31) is bolted to the upper as shown in FIG. It is attached to the lower surface of the frame (16).

Further, elastic members (34) are respectively assembled between the lower portions of both sides of the fuel tank (30) and the lower frame (17). Therefore, the upper part of the upper frame (16) is opened. Incidentally, (35) in FIG. 2 and FIG. 3 is an oil supply cap.

Seat rail (20,2) from above the upper frame (16)
0) The seat (38) is arranged over the upper part, and the front part of the seat (38) has a length extending over substantially the entire upper frame (16) above the fuel tank (30). Formed,
The fuel filler cap (35) of the fuel tank (30) is notched. As shown in FIG. 5 (a), the bottom plate (39) of the seat (38) has a substantially V shape so as to follow the upper frame (16) and the seat rails (20, 20) when viewed from the side. Both sides of the seat (38) hang downward as shown in FIG. 4, and the hanging side portions (38a, 38a) are formed on side surfaces continuous with the side surface of the tank (30).

On the front side of the seat bottom plate (39), as shown in FIG.
As shown in (b), a mounting portion (40) is formed in which the periphery except the front is bulged. An engaging member (41) is fixed to the mounting portion (40) by screws (42, 42, 42), and a required gap is opened between the mounting portion (40) and the engaging member (41) on the front side. Is formed. Further, as shown in FIG. 4, the engaging member (41) is integrally provided with projecting pieces (41a, 41a), which are in contact with both side surfaces of the upper frame (16), so as to face downward. Seat (38) against frame (16)
The lateral displacement of the front part is restricted. On the other hand, the upper frame (1
An engaging piece (43) is welded to a position corresponding to the engaging member (41) on the upper surface of 6). This engagement piece (43)
Are provided so as to project toward the rear of the vehicle body, and are engaged by being inserted into the gap between the engaging member (41) and the mounting portion (40) thereof, and the seat (38) floats upward. Is regulated.

A bulging mounting portion (45) is formed at a position corresponding to the diagonal cross pipe (28) in the substantially central portion of the seat bottom surface (39). The joint piece (46) is fixed by screws (47, 47). The engaging piece (46) is obliquely attached so as to be orthogonal to the axial direction of the cross pipe (28), and is engaged with the cross pipe (28).

Further, mounting pieces (49) are vertically provided on both left and right sides of the rear portion of the seat bottom plate (39). These mounting pieces (49) are bolted to the mounting portions (29a, 29a) of the cross member (29). Fixed by.

As described above, in this embodiment, since the seat front portion can be provided above the fuel tank over substantially the entire upper frame, it is possible to sufficiently cope with the sitting position of the rider during off-road traveling. Become. Further, the front portion of the seat is directly locked to the upper frame, and the central portion is locked to the diagonal cross member, and at the front portion of the seat, movement of the seat in the vehicle width direction is restricted by the protrusion of the engaging member. As a result, it is possible to reliably prevent the seat from floating up and slipping sideways. Further, since the seat is attached by engaging the engaging member and the engaging piece at the front portion and the central portion of the seat, the seat can be easily assembled and the conventional misalignment of the attaching portion can be avoided.

In the present embodiment, the description has been made on the premise that the number of the upper frames in the front part of the frame is one, but the frame structure can be composed of two upper frames. In this case, as shown in FIG. The engaging pieces (43, 43) are provided on the upper surface of the upper frame (16, 16) of, and the engaging members (41, 41) are attached to appropriate places on the bottom plate (39) of the front part of the seat corresponding to these. While engaging, the inner surfaces of the hanging side portions (38a, 38a) on both sides of the seat (38) are respectively attached to the upper frames (16, 16).
To form a shape (both vertical surfaces in FIG. 6) corresponding to the outer surface of the sheet, and by contacting these with each other, the sheet (3
It is also possible to prevent the lateral displacement of 8). In this case, the protrusions (41a, 41) are attached to the engaging members (41, 41) as in the above embodiment.
There is no need to provide a).

As described above, according to the present invention, since the fuel tank is arranged below the front portion of the frame, the front portion of the seat can be provided over the upper portion of the front portion of the frame. It can be sufficiently applied to the sitting position of the rider, which changes during traveling. Further, since the seat front portion is directly attached to the frame front portion by the engaging member and the engaging piece, the seat front portion can be prevented from floating, and the conventional displacement of the attaching portion does not occur. The work of assembling the seat becomes easy.

[Brief description of drawings]

1 to 5 (b) show an embodiment of the present invention. FIG. 1 is a side view of a motorcycle, FIGS. 2 and 3 are side views and plan views of a main part of a vehicle body frame, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2 showing a seat support structure, FIGS. 5 (a) and 5 (b) are side and bottom views of the seat, and FIG. 6 is another view of the present invention. FIG. 6 is a cross-sectional view showing a seat support structure according to the example of FIG. In the drawing 1 ... Motorcycle, 2 ... Front wheel, 8 ... Front fork, 9 ... Head pipe, 14, 15 ... Frame front and rear, 20 ... Seat rail, 30 ... Fuel tank, 38 ...... Sheet, 41, 43 …… Engaging member and engaging piece.

Claims (1)

[Claims] 1. From an upper part of a frame front part extending rearward from a head pipe supporting a front fork for suspending front wheels to a upper part of a frame rear part having a seat rail connected to the frame front part and extending rearward. A seat is arranged across, a fuel tank is arranged below the front part of the frame,
The front surface of the frame and the bottom surface of the seat are opposed to each other, and the front bottom surface of the seat is directly attached to the top surface of the front portion of the frame via an engaging member and an engaging piece that engage with each other. A seat mounting structure for a motorcycle, characterized in that a rear portion is fixed to the seat rail.