JP2571922B2 - Seat mounting structure for riding type vehicles - Google Patents

Description

Description: TECHNICAL FIELD [0001] The present invention relates to a seat mounting structure in a riding type vehicle such as a motorcycle with improved riding comfort.

(Prior art)

For example, as described in Japanese Utility Model Publication No. 44-20997, a seat mounting structure of a riding type vehicle such as a motorcycle is designed to block a vibration caused by irregularities on a road surface so that a vertical load is applied to a vehicle body frame side. The elastic material is adapted to receive the elastic material.

By the way, if you look at the vibrations that occur in the body while the vehicle is running,
There are vertical vibration and engine vibration due to unevenness of the road surface. Since the vibration from the former road surface is larger than the latter from the engine vibration, the occupant does not feel the engine vibration during traveling, and the vertical vibration of the road surface is elastic due to the above-mentioned seat mounting structure. Good ride comfort is ensured because it is absorbed by the material.

However, when the vehicle is stopped, only the engine vibration is the source of vibration. In addition, since the engine vibration includes not only the vertical direction but also the longitudinal direction component, the longitudinal direction cannot be absorbed by the elastic material. Vibration was transmitted to the occupant's body through the seat, which caused discomfort.

[Object of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat mounting structure for a riding-type vehicle in which not only the riding comfort but also the stopping comfort is improved by preventing engine vibrations during a stop from being transmitted to an occupant. Is to provide.

[Configuration of the invention]

In order to achieve the above object, the present invention provides a riding type vehicle in which a seat is mounted on a vehicle body frame side via an elastic material that supports a load in a vertical direction, wherein a fuel tank is fixed on the vehicle body frame, and the elastic member is provided. The elastic member of the intermediate portion is mounted on the upper surface of the fuel tank, and the elastic member of the rear portion is fixed between the left and right vehicle frames behind the fuel tank. The upper surface is brought into contact with the upper surface, the intermediate portion and the rear portion of the seat are respectively supported by the elastic members, and the front surface of the fuel tank is formed as an inclined surface having an upper end inclined upward and rearward, and an L-shaped bracket is formed on the inclined surface. When a hinge is swingably attached to the front end of the bracket located below the upper surface of the fuel tank via a pin so as to be able to swing back and forth, and the seat is installed on a vehicle body frame, the seat The front end of the mounting bracket projecting vertically downward from the front of the bottom plate is engaged with a notch groove provided on the outer periphery of the columnar elastic material, and the front end of the hinge is located above the mounting bracket and the pin. With the elastic member interposed therebetween in the front-rear direction, the elastic member is interposed therebetween, and connected by a bolt and a nut with a spacer penetrating the elastic member, and the seat is configured to be rotatable upward with the pin as a fulcrum,
An engaging arm protruding downward is fixed to the rear end of the bottom plate of the seat, and the engaging arm is detachably attached to the vehicle body frame side by a retractable hook attached to the vehicle body frame side behind the fuel tank. It is characterized by having comprised in.

〔Example〕

FIG. 3 shows a motorcycle provided with a seat mounting structure according to the present invention. A vehicle body 1 having front and rear wheels 2 and 3 mounted on the front and rear, respectively, has a seat 4 mounted on the upper rear side, and an engine 5 on an intermediate portion. Is installed. In this embodiment, the engine 5 is mounted such that the axial direction of the cylinder 5a extends in the front-rear direction in a substantially horizontal state.

As shown in detail in FIGS. 1 and 2, the seat 4 covers a bottom plate 10 made of resin, a cushion material 11 such as polyurethane placed on the bottom plate 10, and a surface of the cushion material 11. And an outer skin 22. Below the seat 4 configured in this manner, a fuel tank 6 fixed on the vehicle body frame 1a is arranged.

The upper front side of the fuel tank 6 is formed on an inclined surface 6a whose upper end is inclined upward and rearward, and a protruding L-shaped bracket 7 is welded to the inclined surface 6a. A hinge 8 is attached to the front end of the bracket 7 below the upper surface of the fuel tank 6 via a pin 9 so as to be swingable in the front-rear direction. At the front of the bottom plate 10 of the seat 4, a mounting bracket 10 a protruding vertically downward when the seat 4 is installed on the vehicle body frame 1 a is integrally provided. A notch groove 12b provided on the outer periphery of the columnar elastic member 12 is engaged with the tip end, and the mounting bracket 12 and the tip end of the hinge 8 located above the pin 9 are elastically interposed between the mounting bracket 12 and the pin 9 in the front-rear direction. The elastic member 12 is connected with a bolt 13 with a spacer and a nut 14 penetrating the elastic member 12 with the member 12 interposed therebetween. The elastic member 12 includes a hinge 8 and a mounting bracket.
A receiving surface 12a that receives a load in the front-rear direction is formed between the receiving surface 12a and the receiving surface 12a.

Further, different elastic members 15, 16 such as rubber are attached to the lower surface middle portion and the rear portion of the bottom plate 10, respectively. The middle elastic member 15 is supported on the upper surface of the fuel tank 6, and the rear elastic material 16 is supported on the upper surfaces of the lateral frames 17 fixed to the left and right vehicle frames 1a, 1a. I try to support.

An engagement arm 18 protruding downward is fixed to the rear end of the bottom plate 10 of the seat 4, and the engagement arm 18 is engaged with a hook 19 attached to the vehicle body frame 1a behind the fuel tank 6. It is removable. The hook 19 is designed to be protruded and retracted by operating the key 20, and when the protruding state is engaged, the engaging arm 18 is hooked and locked. It has become.
When the hook 19 is removed, the seat 4 can be pivoted upward with the pin 9 of the hinge 8 as a fulcrum as shown by a chain line in FIG. The fuel supply to the fuel tank 6 and necessary maintenance work can be performed.

According to the motorcycle described above, vibrations mainly in the vertical direction are applied from the road surface during traveling, but the vibrations are absorbed by the elastic members 15 and 16 supporting the vertical direction, and the seat 4
Since the vibration to the side is reduced, the ride comfort can be improved. In addition, vibration using the engine 5 as a vibration source is also generated. However, since this engine vibration is generally smaller than vibration due to unevenness of the road surface, the occupant's bodily sensation is extremely small.

On the other hand, when the vehicle is stopped, there is no vibration from the road surface, and only vibration from the engine 5 is generated. The direction of the engine vibration is not only in the vertical direction but also in the front-back direction. But,
According to the seat mounting structure, the vertical vibration component is well absorbed by the elastic members 15 and 16, and the front and rear vibration component is absorbed by the elastic material 12 interposed between the hinge 8 and the mounting bracket 10a. Therefore, the engine vibration transmitted to the occupant when the vehicle is stopped is reduced, and the riding comfort is improved.

Further, in this case, the supporting surfaces of the elastic members 15 and 16 for supporting the load in the
And in contact with the upper surface of the horizontal frame 17, and the vibration in the front-rear direction can be released by the contact surface, so that the riding comfort can be further improved.

Also, a hinge 8 is attached to the tip of a bracket 7 provided on the front surface of the fuel tank 6 via a pin 9, and when the seat 4 is installed on the vehicle body frame 1 a, a mounting bracket projecting vertically downward from the seat. The distal end of the elastic member 12 is engaged with the notch groove 12b provided on the outer periphery of the columnar elastic member 12 so that the mounting bracket 10a and the distal end of the hinge 8 located above the pin 9 are moved forward and backward. Spacer blow bolt 13
And the nut 14, vibration in the front-rear direction of the hinge 8 is absorbed only by the elastic deformation in the axial direction of the elastic member 12, and no force in the excessive direction acts on the elastic member 12. The life of the seat 4 can be extended, and the load of the seat acting on the mounting bracket 10a when the seat 4 is pivoted upward can be absorbed by the elastic member 12, and the hinge 8
No excessive force acts on

Also, the front surface of the fuel tank 6 is formed on an inclined surface 6a whose upper end is inclined upward and rearward, and an L-shaped bracket 7 for supporting a hinge 8 attached to the seat 4 is welded to the inclined surface 6a. Since the bracket 7 is an L-shaped structure, the strength is high, and one side of the L-shape is welded to a wide inclined surface 6a formed by inclining the front surface of the fuel tank 6 so that the bracket 7 can be firmly attached. Even if a load is applied from the seat 4 side, the mounting portion is not easily damaged.

A bracket 7 welded to the front side of the fuel tank 6
The hinge 8 is attached to the front end of the seat 4 via a pin 9 so as to be swingable in the front-rear direction, and the front end of the hinge 7 and the mounting bracket 10a of the seat are connected via an elastic material 12, so that the seat 4 side It is not necessary to provide a space for accommodating a hinge part connecting the fuel tank 6 and the fuel tank 6 between the fuel tank 6 and the seat 4. Therefore, the fuel tank 6 is recessed to reduce the capacity, and the thickness of the seat 4 is partially reduced. Never thin.

Further, in the case where the engine 5 is mounted such that the engine 5 is mounted horizontally in the axial direction of the cylinder 5a as in the above-described embodiment, the vibration component in the longitudinal direction becomes large, so that in general, a complicated balance is mounted on the crankshaft or the like. Attach weights, etc.
Adjustments are made to reduce the front-back direction component. However, with the seat mounting structure as described above, the adjustment can be easily performed by an external mechanism without providing a complicated adjustment mechanism in the engine, so that the cost can be reduced.

Further, in the case where the engine 5 is mounted horizontally in this manner, the engine 5 is fixed to the vehicle body frame by a horizontal bolt through an elastic material. Therefore, by adjusting the bolt tightening force, it is possible to adjust transmission of engine vibration in the front-rear direction to the vehicle body frame side, and instability caused by the elastic material being too soft during braking or acceleration. Can be adjusted.

〔The invention's effect〕

As described above, the seat mounting structure according to the present invention is configured such that the seat is mounted not only on the vehicle body frame side through the elastic material that receives the load in the vertical direction but also through the elastic material that supports the load in the front-rear direction. Therefore, not only the ride comfort during traveling can be improved, but even when only the engine vibration at the time of stoppage is applied, the vertical and front-back vibrations can be absorbed and mitigated to improve the ride comfort. .

In addition, elastic materials are arranged at the middle and rear portions of the seat, and the elastic materials are brought into contact with the upper surface of the fuel tank and the horizontal frame,
Since the seat is supported, the vibration in the front-rear direction can be released by the contact surface, and the riding comfort can be further improved.

In addition, a hinge is swingably attached to the tip of the bracket provided on the front of the fuel tank via a pin, and when the seat is installed on the body frame, it protrudes vertically downward from the front of the bottom plate of the seat. The front end of the mounting bracket to be engaged with the notch groove provided on the outer periphery of the columnar elastic material, and the mounting bracket and the front end of the hinge located above the pin are set in the front-rear direction, and the elastic material is interposed between them. By connecting the bolts and nuts with spacers penetrating the elastic material, the vibration in the front-rear direction of the hinge is absorbed only by the elastic deformation in the axial direction of the elastic material, and a force in an unreasonable direction is applied to the elastic material. Since it does not act, the life of the elastic member can be extended, and the load of the seat acting on the mounting bracket when the seat is turned upward can be absorbed by the elastic member.
No excessive force acts on the hinge.

In addition, the front surface of the fuel tank is formed on an inclined surface whose upper end is inclined upward and rearward, and an L-shaped bracket for supporting a hinge attached to the seat side is welded to the inclined surface, so that the bracket is L-shaped. The structure is high, so it can be attached firmly by welding one side of the L-shape to a wide inclined surface formed by inclining the front of the fuel tank, even if a load is applied from the seat side, The mounting part is not easily damaged.

A hinge is attached to the front end of the bracket welded to the front side of the fuel tank via a pin so as to be swingable in the front-rear direction, and the front end of the hinge and the mounting bracket of the seat are connected via an elastic material. Therefore, it is not necessary to provide a space between the fuel tank and the seat for accommodating the hinge part connecting the seat side, so that the fuel tank is dented to reduce the capacity, There is no need to partially reduce the thickness.

Further, since the seat is rotatable upward with the pin disposed at the tip of the seat as a fulcrum, even if a fuel tank is accommodated below the fuel tank, fuel supply to the fuel tank and maintenance work can be easily performed. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of a seat mounting structure according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing the entire seat, and FIG. It is a side view which shows a motorcycle. 1a: Body frame, 4: Seat, 5: Engine, 6: Fuel tank, 6a: Inclined surface, 7: Bracket, 8: Hinge, 9: Pin, 10: Bottom plate, 10a ... … Mounting brackets, 12,15,16 …… Elastic material, 12a …… Receiving surface, 12b …… Notched groove, 13 …… Bolt with spacer, 14 …… Nut, 17…
... horizontal frame, 18 ... engagement arm, 19 ... hook.

Claims (1)

(57) [Claims] 1. A riding type vehicle in which a seat (4) is mounted on a body frame (1a) side through elastic members (15, 16) for supporting a load in a vertical direction, wherein a fuel is mounted on the body frame (1a). The tank (6) is fixed, and the elastic members (15, 16) are attached to the middle part and the rear part of the bottom plate (10) of the seat (4), respectively, and the elastic material (15) of the middle part is attached to the fuel tank ( The upper elastic material (16) is brought into contact with the upper surface of a horizontal frame (17) fixed between the left and right vehicle body frames (1a) behind the fuel tank (6) on the upper surface of the elastic member (6). The front and rear portions of the seat (4) are respectively supported by (15, 16), and the front surface of the fuel tank (6) is formed as an inclined surface (6a) having an upper end inclined upward and rearward. An L-shaped bracket (7) is welded to (6a), and the fuel tank (6) is welded.
At the tip of the bracket (7) located below the upper surface of the vehicle, a hidine (8) is attached via a pin (9) so as to swing back and forth, and the seat (4) is mounted on the vehicle body frame (1a). When installed, the front end of the mounting plate (10a) projecting vertically downward from the front of the bottom plate (10) of the seat (4) has a notch groove provided on the outer periphery of the columnar elastic material (12). (12a), with the mounting bracket (10a) and the tip of the hinge (8) positioned above the pin (9) being forward and backward, while the elastic material (12) is interposed therebetween. The elastic member (12) is connected by a bolt (13) with a spacer and a nut (14) penetrating the elastic member (12), and the seat (4) is configured to be rotatable upward about the pin (9) as a fulcrum. An engagement arm (18) protruding downward is fixed to the rear end of the bottom plate (10) of 4). Seat (18) mounted on the vehicle body frame (1a) rearward of the fuel tank (6) and removably hooked to the vehicle body frame (1a) by a retractable hook (19). Construction.