JP2597428B2 - Engine support structure for scooter type vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Industrial applications]

The present invention relates to a structure for supporting an engine of a scooter type vehicle.

[0002]

2. Description of the Related Art Normally, a scooter type vehicle is provided with a so-called power unit in which an engine, drive wheels and power transmission means for connecting the two are integrated, and a front end of the power unit is connected to a body frame via a link mechanism. Supported (for example, JP-A-2-92796,
See JP-A-58-15894).

[0003]

However, the engine (power unit) of the conventional scooter type vehicle described above.
In the above support structure, the link mechanism protrudes in the vehicle body width direction and in the front-rear direction, respectively, and there is a disadvantage that the arrangement space for engine accessories and the like is limited.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to suppress the link mechanism from protruding in the width direction and the front-back direction of the vehicle body, and to realize a compact scooter-type vehicle intake including the link mechanism. It is intended to provide a device.

[0005]

In order to achieve the above object, according to the present invention, a link mechanism has an upper end swingably supported by a vehicle body frame and a lower end swingably supporting the engine. Left and right link members formed in a substantially rectangular shape, and a cross member inserted into the center of the link member located forward of the vehicle body from the upper and lower ends of the left and right link members, the left and right link members are , Is formed to bend in the left-right direction of the vehicle body so that the lower end is inward of the vehicle body than the upper end,
The cross member is provided with a link stopper made of an elastic material which is engaged with the vehicle body frame and restricts the movement of the link mechanism.

[0006]

Since the left and right link members constituting the link mechanism are formed in a shape of a letter as viewed from the side, the link members can be made compact in the longitudinal direction of the vehicle body, and the left and right link members can be made larger than the upper end. Since the lower end is formed to be bent in the left-right direction of the vehicle body so as to be inward of the vehicle body, compactness in the vehicle body width direction can be achieved.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a scooter type motorcycle to which the present invention is applied, and FIG. 2 is a plan view thereof. In FIG. 1, reference numeral 1 denotes a vehicle body frame extending rearward from the front (left side in the figure) of the vehicle body, 2 denotes a horizontally-oriented engine having a cylinder extending forward, 3 denotes an engine 2 and rear wheels (drive wheels) ) 4 is a power transmission device for transmitting power to the engine 2,
The drive unit 3 and the rear wheel 4 constitute a power unit 5. The power unit 5 is connected to a central portion of the vehicle body frame 1 by a link mechanism 6 so as to be vertically swingable, and is supported by the vehicle body frame 1 via a suspension 7.

In FIG. 1, reference numeral 9 denotes a steering wheel, 10 denotes a front wheel in which a tire 10b is mounted on a wheel 10a, 11 denotes a front fork mounted on the vehicle body frame 1 to support the front wheel 10, and 12 denotes a front end hinged. A seat 13 is provided to be openable and closable, and 13 is a storage case for storing a helmet and the like provided below the seat 12, and this storage case 13 is attached to brackets 23b and 23c attached to a side frame 23 to be described later. And the rear is fixed by bolts and nuts, respectively. 1
Reference numeral 4 denotes a fuel tank provided below the floor portion 14a at the center of the vehicle body, 15 denotes a vehicle body cover that covers the vehicle body frame 1 and the fuel tank, etc., 16 denotes a rear fender that covers an oblique rear upper portion of the rear wheel 4, 17 denotes a battery, and 18 denotes a battery. Oil tank, 19
Is an exhaust pipe.

The vehicle body frame 2 includes a head pipe 21
And a down tube 22 extending obliquely downward and rearward from a lower portion of the head pipe 21 and having a lower end slightly bent rearward.
And a pipe which is connected to a position slightly elevated from the lower end of the down tube 22, extends substantially horizontally to the front of the seat while spreading left and right, and further extends obliquely upward and rearward after being bent. And a side frame 23 made of a material. A cross pipe 24 is connected to the front ends of the left and right side frames 23, and a cross pipe 25 having a U-shape in a front view is connected to the rear end of the floor portion of the side frames 23. A duct 2 for sending air for cooling the engine passing through the inside of the cross pipe 25 into the bell-con case of the engine.
5a is connected. Reference numeral 6 denotes an air cleaner mounted above the power unit 5, and 27 denotes a carburetor which communicates with the air cleaner 26 via a duct 28.

As shown in FIGS. 3 to 5, the link mechanism 6 has an upper end swingably supported by a side frame 23 and a lower end swingably supports a front portion of the power unit 6. The left and right link members 30, 30 formed in a substantially U-shape and a cross member 31 inserted into the center of the link member 30 located forward of the upper and lower ends of the left and right link members 30 in the vehicle body. Prepare.

The left and right link members 30 are formed to be bent in the left-right direction of the vehicle body such that the lower end is located inside the vehicle body than the upper end. Specifically, the first-stage bending is performed from the portion of the upper end 30a attached to the side frame 23 to the central portion 30b through which the cross member 31 is inserted,
Further, a lower end 3 for supporting the engine from the central portion 30b.
The second stage of bending is performed before 0c.

The upper end 30a of the link member 30 is mounted on a rubber mount 34 with a bolt 35 and a nut 36 sandwiched between brackets 33 mounted on the side frame 23.

Both ends 31a of the cross member 31 are shown in FIG.
As shown in the figure, the cross-section is pressed and deformed in a gourd-like shape, and the inner peripheral surface thereof has both ends 31 a of the cross member 31.
A link stopper 38 made of an elastic material corresponding to the outer peripheral shape of the above is locked and fitted. As shown in FIGS. 7 and 8, the link stopper 38 is formed in a substantially circular shape as a whole, and has flat portions 38a, 38 at the upper, lower, front, and lower sides of the outer peripheral portion, respectively.
b, 38c are formed, and angled narrow portions 38aa, 38bb, 38cc are formed at the tips of the flat portions, respectively.

The distal ends of the flat portions 38a, 38b and 38c on the outer periphery of the link stopper 38 are connected to the respective inner surfaces 39a of a U-shaped regulating plate 39 attached to the bracket 33 of the side frame 23 as shown in FIG. , 39b,
39a, the link mechanism 6 moves with a relatively small force when the narrow portions 38aa, 38bb, 38cc are deformed, and with a relatively large force after the narrow portions are deformed. It is being regulated.

As shown in FIG. 4, brackets 4 extending from the engine side are provided at lower ends 30c of the left and right link members.
0 is the bolt 42 with the rubber mount 41 interposed.
And a nut 43. The exhaust pipe 19 is provided between the front end of the engine 2 and the cross member 31.
The base of is inserted.

As shown in FIG. 9 and FIG. 10, a stand 70 is attached to the lower part of the front end of the power unit 5 so as to be rotatable around a rod 71 protruding from the power unit 5. The stand 70 is counterclockwise in the upright state and clockwise in the stowed state by the spring 72 stretched between the locking section 70a on the upper part of the stand and the spring locking section 5a formed in the power unit 5. Are respectively urged to rotate. An arc-shaped stopper 73 is formed at the front portion of the stand 70 to contact the power unit 5 when standing up and restrict the counter-clockwise rotation of the stand 70. The stopper 73 is formed on the power unit 5. Recess 5b
And comes into contact with the inner peripheral surface 5bb. Note that 7
4 is a stop rubber provided on the stand 70, 75 is a padlock for stand lock, and 76 is a kick pedal.

Thus, according to the engine support structure having the above structure, the left and right link members 3 constituting the link mechanism 6 are provided.
Since 0 is formed in the shape of a letter as viewed from the side, the space occupied by the link mechanism 6 in the vehicle longitudinal direction can be reduced. Therefore, for example, the length of the link mechanism becomes substantially half as compared with the case where a link member extending straight in the front-rear direction is used.

Further, since the left and right link members 30 are bent in the left-right direction of the vehicle body such that the lower end 30c is located inside the vehicle body than the upper end 30a, the cross member 31 and the link stopper 38 are formed by the bracket 33. As a result, the vehicle does not protrude in the vehicle width direction, so that the vehicle can be easily made compact in the vehicle width direction.

[0019]

As described above, according to the present invention, since the left and right link members constituting the link mechanism are formed in the shape of a letter as viewed from the side, the link mechanism can be made compact in the longitudinal direction of the vehicle body. In addition, since the left and right link members are bent in the left-right direction of the vehicle body such that the lower end is located inside the vehicle body than the upper end, compactness in the vehicle width direction can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a motorcycle to which the present invention is applied.

FIG. 2 is a plan view of the same.

FIG. 3 is a detailed side view of an engine supporting portion.

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is a side view of the link.

FIG. 6 is a sectional view of a regulating plate on a vehicle body frame side which engages with a link stopper.

FIG. 7 is a side view of a link stopper.

FIG. 8 is a sectional view taken along line BB of FIG. 7;

FIG. 9 is a side view showing a power unit and members attached to a lower part thereof.

FIG. 10 is a side view showing an attached state of an upper portion of the stand.

[Explanation of symbols]

 Reference Signs List 2 engine 3 power transmission device 30 link member 30a upper end of link member 30b central portion of link member 30c lower end of link member 31 cross member 38 link stopper 39 regulating plate

Claims (1)

(57) [Claims] 1. A support structure for an engine of a scooter type vehicle that supports a front end portion of a substantially horizontal and horizontal type engine via a link mechanism, wherein the link mechanism swingably supports an upper end to a body frame. A left and right link member formed in a substantially U-shape in side view and swingably supporting the engine at a lower end, and a link member central portion located forward of the upper and lower ends of the left and right link members in the vehicle body And the left and right link members are formed to be bent in the left-right direction of the vehicle body such that a lower end of the link member is located inside the vehicle body than an upper end thereof, and the left and right link members engage with the cross body member on the vehicle body frame side. An engine support structure for a scooter-type vehicle, wherein a link stopper made of an elastic material that restricts the movement of the link mechanism is attached.