JPH04283188A - Seat support device for folding type motorcycle - Google Patents

Abstract

PURPOSE:To form a seat support device for a folding type motorcycle in a compact state in a folding state and to simplify assembly properties by vertically folding the seat through link mechanisms, pivotally mounted and coupled to each other, in linkage with folding through longitudinal slide of a main car body frame. CONSTITUTION:A main car body frame 20, a rear car body frame 30, and a seat 40, which are longitudinally slidably assembled together, are pivotally mounted and coupled to each other through a plurality of links 51 and 55 not crossing each other as seen from a side. Stoppers 25, 35, and 42 engaged with the links 51 and 55 in a state to hold the seat 40 in a raising position and supporting the load of the seat 40 are located to either the seat 40 side or the frames 20 and 30 side. This constitution vertically folds the seat 40 interlocking with longitudinal folding of the car body frames 20 and 30 to achieve production of further compact state, and shortens the links 51 and 55.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a seat support device for a folding motorcycle, and in particular, the present invention relates to a seat support device for a folding motorcycle. This relates to the structure of the link mechanism.

0002

[Prior Art] A motorcycle in which a seat is foldable in the vertical direction via an X-shaped link mechanism consisting of two links that intersect with each other when viewed from the side on the body frame was disclosed in U.S. Patent No. 58-64588. It is publicly known from the publication No. In addition, a structure in which the main body frame supporting the front wheels and the rear body frame equipped with an engine and a seat and supporting the rear wheels are assembled so as to be slidable in the longitudinal direction is disclosed in Japanese Patent Laid-open No. 5
This method is known from Japanese Patent No. 7-107972.

0003

[Problems to be Solved by the Invention] As disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 57-107972, the vehicle body frame is configured to be foldable in the longitudinal direction, and the vehicle body frame is linked to folding and stretching in the longitudinal direction. As disclosed in the above-mentioned Japanese Utility Model Publication No. 58-64588, the seat can be folded up and down or held in the raised position via a link mechanism to further reduce the size of the seat in the folded state. Conceivable. however,
The link mechanism for supporting the seat disclosed in the above-mentioned Japanese Utility Model Publication No. 58-64588 requires two links that cross each other to form an X shape when viewed from the side, so the links are long and The links have to be pivotally connected to each other at the middle, which poses problems such as difficulty in assembling.

[0004] Accordingly, an object of the present invention is to enable the seat to be folded vertically and held in the raised position in conjunction with the folding and stretching of the vehicle body frame in the longitudinal direction, thereby achieving further compactness in the folded state. In addition, the link mechanism for supporting the seat can be constructed with shorter links than the conventional X-shaped ones that intersect with each other, eliminating the need for mutual pivot connections, and therefore simplifying assembly.
Another object of the present invention is to provide a seat support device for a folding motorcycle that can effectively support the load of the seat when it is held in a raised position.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a main body frame that supports a front wheel in a motorcycle having a seat that can be folded up and down via a link mechanism on the body frame. and a rear vehicle body frame supporting a rear wheel are assembled so as to be slidable in the longitudinal direction, and the link mechanism pivotally connects the main vehicle body frame, the rear vehicle body frame, and the seat to each other, and when viewed from the side, The stopper is configured of a plurality of non-intersecting links, and is provided with a stopper on at least one of the seat side and the frame side that engages with the link and supports the load of the seat while the seat is held in the raised position. It is characterized by

[0006]

[Operation] The seat is folded up and down in conjunction with the sliding movement of the main body frame and the rear body frame in the longitudinal direction, and the seat is folded up and down through a link mechanism that is pivotally connected to each other. It can be made more compact. Since the link mechanism consists of multiple links that do not intersect in side view, the links can be made shorter than conventional X-shaped links that intersect with each other, and there is no need for mutual pivot connections, making assembly easier. It can also be simplified. Furthermore, the load of the seat in use when held in the raised position is effectively supported by engagement with the link by a stopper provided on at least one of the seat side and the frame side.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. In FIG. 1 showing an example of a folding motorcycle to which the present invention is applied, 1 is an engine, 3 is a rear wheel, 5 is a front wheel, 7 is a front fork, 9 is a handlebar, 10 is a head pipe, and 20 is a main body frame , 30 is a rear body frame, 40 is a seat, and 50 is a link mechanism. The engine 1 and the rear wheels 3 are connected to a pair of left and right frame side parts 31, 3.
It is supported by a rear body frame 30 composed of 1,
An exhaust muffler 2 between the upper halves of the frame side parts 31, 31;
A fuel tank 11 and an oil tank 12 are provided, and 4 is a rear fender. A head pipe 10 that steerably supports a front fork 7 that supports a front wheel 5 and a pair of left and right handlebars 9, 9 is attached to the front end of a main body frame 20 that is composed of a pair of left and right frame side parts 21, 21. 6 is the front fender.

The pair of left and right handlebars 9, 9 are foldably assembled to the upper part of a handle holder 13, and an upper steering shaft 14 is pivotally connected to the lower part of the handle holder 13. is rotatably held by the upper arm 15. Further, a lower steering shaft 16 is pivotally connected to the lower part of the upper steering shaft 14, and this lower steering shaft 16 is rotatably held by the head pipe 10. Further, a front fork 7 is fixed to the lower part of the lower steering shaft 16 via a bottom bridge 8, 17 is a headlight cover, and 18 is a headlight. FIG. 3 is a cutaway view of the folded part of the steering shaft. Reference numeral 111 indicates a pivot pin that connects the upper steering shaft 14 and lower steering shaft 16, and 119 indicates the left and right pivot pins installed on the front part of the main body frame 20. This is a collar that pivotally holds the upper arm 15 with respect to the bracket 118, and this collar 119 is located concentrically with the pivot pin 111.

[0009]The pair of left and right frame side portions constituting the rear vehicle body frame 30 are inserted into the guide rail grooves 22, 22 in the longitudinal direction formed on the inner surfaces of the pair of left and right frame side portions 21, 21 constituting the main vehicle body frame 20. A pair of front and rear rollers 32, 32, . Further, the upper arm 15 is pivotally connected to the front part of the rear body frame 30 via a joint arm 19. FIG. 5 shows the frame lock mechanism 29, and 291 is the upper arm 1.
5, a locking lever 293 is a locking pin protruding from the left and right protrusions 292 of the upper arm 15; 295;
296 is a locking hole thereof, and 297 is a key cylinder. The frame locking mechanism 29 is operated by operating the lock operation lever 291 to lock the left and right lock pins 293 and 2.
93 into the lock hole 29 of each lock plate 295, 295
6,296 to fix the upper arm 15 to the main body frame 20, it is maintained in the used state as shown in FIG. unlock.

Further, the link mechanism 50 of the seat 40 has a sixth link mechanism 50.
As shown in the enlarged figure, the front link 51 and the rear link 55
The front link 51 and the rear link 5
Reference numeral 5 denotes a common part that is gate-shaped when viewed from the front and rear directions as shown in FIG. That is, the seat bottom plate 41 is formed with a pair of left and right lower convex portions 42, 42 extending in the front-rear direction, and lower bifurcated bracket-shaped link pivot portions 43, 45 are continuously formed in front and behind the lower convex portions 42. The gate-shaped upper part of the front link 51 is attached to the front link pivot portion 43 and the pivot shaft 4
4, and the rear link pivot portion 45
A portal-shaped upper portion of the rear link 55 is connected to the rear link 55 by a pivot shaft 46. Upper projecting piece-shaped link pivot parts 33, 33 are formed at the rear upper part of the pair of left and right frame side parts 31, 31 constituting the rear body frame 30. A lower gate-shaped portion of the front link 51 is connected to the front link 51 by a pivot shaft 34. Furthermore, a pair of left and right frame side parts 21 forming the main vehicle body frame 20
, 21 has a boss-shaped link pivot portion 23, 23 on the rear inner surface.
A lower gate-shaped portion of the rear link 55 is connected to the link pivot portion 23 of the main body frame 20 by a pivot shaft 24 . In this way, the link mechanism 50 has two front and rear links 51 that do not intersect with each other when viewed from the side.
55.

Here, stopper abutting portions 52 and 53 projecting inward are provided at the rear of the upper end and the front of the lower end of the front link 51, and the front of the upper end and the rear of the lower end of the rear link 56 are provided. Stopper abutting portions 56 and 57 are provided to protrude inwardly. The lower convex surface portion 42 of the seat bottom plate 41 allows a stopper abutting portion 52 at the rear of the upper end of the front link 51 and a stopper abutting portion 56 at the front of the upper end of the rear link 56 to abut from below when the seat 40 is in the raised state. Therefore, the lower convex surface portion 42 of the seat bottom plate 41 also serves as a stopper. Further, on the front side of the link pivot portion 33 of the rear body frame 30, a stopper portion 35 is protrudingly provided so that the stopper contact portion 53 in front of the lower end of the front link 51 can be contacted from above when the seat 40 is in the raised state. ing. Further, on the rear side of the link pivot portion 23 of the main vehicle body frame 20, a stopper portion 25 protrudes from which a stopper contact portion 57 at the rear of the lower end of the rear link 55 can be contacted from above when the seat 40 is in the raised state. has been done.

Note that there are seats 4 on the left and right sides of the seat bottom plate 41.
In the downward folded state of 0, the main body frame 2
A pair of front and rear legs 47, 48 that can come into contact with the left and right frame side parts 21, 21 forming the frame 0 are vertically provided. Further, a reflector 49 is attached to the rear portion of the seat bottom plate 41. Furthermore, a license plate 59 is attached to the gate-shaped rear surface of the rear link 55. 591 is a license plate mounting screw, 551 is a license plate holding projection, 201 is a frame connecting bolt, 211 is a frame grip, and 212 is a frame notch. And left and right frame side parts 21 that constitute the main vehicle body frame 20,
A tail light unit 60 is disposed between the rear portions of the vehicle 21. That is, as shown in FIGS. 8 to 10, the tail light unit 60 includes a tail lamp 63 that also serves as a stop lamp in the center of a case 61, blinker lamps 64, 64 on the left and right sides of the tail lamp 63, and a lens 65 in the opening of the case 61.
It becomes attached. This tail light unit 60 is
a pair of left and right coupling pieces 62 protruding forward from the case 61;
62 is assembled by co-tightening using the pivot shaft 24 at the lower part of the rear link 55 to the link pivot section 23 of the main body frame 20. Note that the headlight unit case 61 has claws 66 on the left and right sides of the lower front thereof that are engaged with hooks 216 provided inside the side surface portion 21 of the main vehicle body frame.

In the above motorcycle, the upper arm 15 and the joint arm 19 can be opened by folding the handlebar 9 backward, tilting the handle holder 13 backward, and folding the upper steering shaft 14 backward, as shown in FIG. They are folded forward and downward, and at the same time, due to the engagement between the guide rail grooves 22, 22 and the rollers 32, 32..., the main vehicle body frame 20 slides rearward with respect to the rear vehicle body frame 30, and the longitudinal length of the vehicle body is shortened. At the same time, the seat 40 is lowered in height and folded downward by the front link 51 collapsing in a substantially clockwise direction in side view and the rear link 55 collapsing in a substantially counterclockwise direction in side view. In this way, when the seat 40 is folded downward in conjunction with the folding of the vehicle body frames 20, 30 in the longitudinal direction, the pair of front and rear legs 47, 48 vertically disposed on the left and right sides of the seat bottom plate 41 are attached to the side surfaces of the main vehicle body frame. It is in contact with the portion 21.

Then, by performing the operation opposite to the folding operation, the usage condition shown in FIG. 1 is obtained, that is, the main vehicle body frame 20
slides forward with respect to the rear body frame 30, increasing the longitudinal length of the vehicle body, and in conjunction with this, the front link 5
1 and the rear link 55 are raised to a state where they are nearly parallel, and the seat 40 is held in the raised position. By locking the locking mechanism 29 provided between the main body frame 20 and the upper arm 15, the operating state as shown in the figure is maintained. In this way, the vehicle body frame 20, 3
In the operating state in which the seat 40 is held in the upper position in conjunction with the stretching of the seat bottom plate 4 in the front-rear direction,
A stopper abutting portion 52 at the rear of the upper end of the front link 51 is attached to the lower convex surface portion 42 which includes link pivot portions 43 and 45 at the front and rear of the front link 51.
The stopper contact portion 57 in front of the upper end of the rear link 56 contacts from below, and at the same time, the stopper contact portion 57 in front of the lower end of the front link 51 contacts the stopper portion 35 in front of the link pivot portion 33 of the rear body frame 30. 53 abuts from above, and a stopper abutting portion 57 at the rear of the lower end of the rear link 55 abuts the rear side of the link pivot portion 23 of the main body frame 20 from above. With the above stopper structure, the front link 5
1 and the rear link 55 are prevented from further rotation, and the load of the seat 40 and the occupant seated thereon is effectively supported.

In addition to the above embodiments, for example, as shown in FIG. 11, a third intermediate link 150 is provided between the front link 51 and the rear link 55, and this intermediate link 51 is parallel to one of the front and rear links (not shown The link mechanism 50 may be made parallel to the front link 51) and pivotally connected to the lower convex surface portion 42 of the seat bottom plate 41 and the main body frame side surface portion 21 by pivot shafts 151 and 152, respectively. In the embodiment, stoppers were provided on each of the seat 40 side, the main body frame 20 side, and the rear body frame 30 side. A stopper may be provided on one side, or only one stopper may be provided on either one of the main body frame 20 side and the rear body frame 30 side.

[0016]

[Effects of the Invention] As described above, according to the present invention, the main body frame and the rear body frame, which are assembled so as to be slidable in the longitudinal direction, and the seat are pivotally connected to each other by a plurality of links that do not intersect in side view. In addition, a stopper is provided on at least one of the seat side or the frame side that engages with the link and supports the load of the seat when the seat is held in the raised position, so it is linked to the folding of the vehicle body frame in the longitudinal direction. and fold the sheet vertically,
It is possible to achieve further compactness in the folded state, and compared to the conventional X-shaped links that intersect with each other, the links can be made shorter, and mutual joints are not required, simplifying assembly. In addition to being able to achieve this, it is also possible to effectively support the load of the seat when it is held in the raised position.

[Brief explanation of the drawing]

[Fig. 1] A side view showing an example of a folding motorcycle to which the present invention is applied in a state of use.

[Figure 2] Side view of the same folded state

[Figure 3] Longitudinal front view of the folded part of the steering shaft

[Figure 4] Vertical front view of frame sliding engagement part

[Fig. 5] Plan view showing the frame lock mechanism

[Fig. 6] An enlarged side view of the link mechanism portion, etc. according to the present invention in a used state with the sheet cut away.

[Fig. 7] Enlarged rear view of the seat, link mechanism, etc., showing the left half cut away in the same state of use.

[Fig. 8] Side view showing the relationship between the rear link and the tail light unit

[Figure 9] Rear view of tail light unit case

[Figure 10
] Plan view showing the right half of the tail light unit cut away.

FIG. 11 is an enlarged side view showing a modification example of the link mechanism portion according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1...Engine, 3...Rear wheel, 5...Front wheel, 20...Main body frame, 22...Guide rail groove, 23...Link pivot portion, 2
5...Stopper, 30...Rear body frame, 32...Roller,
33...Link pivot joint, 35...Stopper, 40...Seat,
42... Stopper, 43, 45... Link pivot joint, 50... Link mechanism, 51, 55, 150... Link, 52, 53,
56, 57...Stopper contact portion.

Claims (1)

[Claims] Claim 1: In a motorcycle having a seat foldable vertically via a link mechanism on a body frame, a main body frame supporting a front wheel and a rear body frame supporting a rear wheel are slidable in the longitudinal direction. The link mechanism is constructed of a plurality of links that pivotally connect the main vehicle body frame, the rear vehicle body frame, and the seat to each other and do not intersect in side view, and the seat is moved to the raised position. 1. A seat support device for a folding motorcycle, characterized in that a stopper is provided on at least one of the seat side and the frame side to engage with the link and support the load of the seat while the seat is held in place.