JP3109680B2 - Folding motorcycle frame device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame device for a foldable motorcycle, and more particularly to a positioning means provided in addition to a guide rail groove and a roller portion for allowing a main body frame and a rear body frame to slide in the front-rear direction. It is about.

[0002]

2. Description of the Related Art In a motorcycle, a main body frame supporting a front wheel and a rear body frame including an engine and a seat and supporting a rear wheel are slidable in the front-rear direction by a combination of guide rail grooves and rollers. The assembled product is known from Japanese Patent Application Laid-Open No. 57-107972, and in a folded state and an expanded state,
A structure is employed in which the main body frame and the rear body frame are fixed to each other using through bolts.

[0003]

However, since the positioning of the vehicle body frame is performed using a through bolt, there is a problem that the operation is troublesome.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a foldable motorcycle frame device which can easily perform positioning in a use state where a vehicle body is stretched in the front-rear direction by a combination of guide rail grooves and rollers.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an engine comprising a main body frame comprising a pair of left and right members for supporting a front wheel, and a pair of left and right members.
And a body frame after supporting the rear wheel, one of the body off
A guide rail groove provided on the right and left members of the frame, the other
The front and rear of the vehicle body frame by a combination of a roller provided on the right and left members of the vehicle body frame a slidably assembled collapsible motorcycle in the front-rear direction, the guide rail
In addition to the roller groove and roller,
In combination, the main body frame and the rear body frame
Positioning means for regulating the vertical and horizontal directions between
And the positioning means with respect to the vertical direction is
The folded state of the main body frame and the rear body frame
And in the stretched state, at a position near the roller
A concave and convex engaging portion for engaging and regulating the vertical direction,
The positioning means with respect to a direction,
With the rear body frame in the stretched state and
Characterized that you have engaging portion comprising a slope for regulating the direction.

[0006]

With the positioning means provided in addition to the guide rail groove and the roller portion, engagement is achieved by sliding in the front-rear direction.
Regulation is performed on at least one of the vertical direction and the horizontal direction between the main body frame and the rear body frame.
With the main body frame and the rear body frame extended
And the concave / convex engaging portion is engaged near the roller to
Direction is regulated, and the right and left
The direction is restricted, and in the folded state,
The vertical direction is regulated by the engagement of the joints.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1 showing an example of a foldable 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, and 41 is a seat. Engine 1 and rear wheel 3
Are supported by a rear body frame 30 composed of a pair of left and right frame side parts 31, 31, and the exhaust muffler 2 and the fuel tank 11 are provided between the upper halves of the frame side views 31, 31.
And an oil tank 12, and 4 is a rear fender. A front fork 7 for supporting the front wheel 5 and a head pipe 10 for steerably supporting a pair of left and right handlebars 9, 9 are provided with a pair of left and right frame side portions 21, 2.
The front fender 6 is connected to the front end of the main body frame 20 constituted by 1.

A pair of left and right handlebars 9 and 9 are foldably mounted on an upper portion of a handle holder 13, and an upper steering shaft 14 is pivotally connected to a lower portion of the handle holder 13. Are rotatably supported by the upper arm 15. A lower steering shaft 16 is pivotally connected to a lower portion of the upper steering shaft 14, and the lower steering shaft 16 is rotatably held by the head pipe 10. Further, a front fork 7 is connected to a lower portion of the lower steering shaft 16 via a bottom bridge 8, reference numeral 17 denotes a headlight cover, and reference numeral 18 denotes a headlight. FIG. 3 is a cutaway view of the folded portion of the steering shaft. Reference numeral 111 denotes a pivot pin that connects the upper steering shaft 14 and the lower steering shaft 16.
Is a collar for pivotally holding the upper arm 15 to left and right brackets 118 erected on the front of the main body frame 20, and the collar 119 is located concentrically with the pivot pin 111.

A pair of left and right frame side portions forming the rear body frame 30 are inserted into front and rear guide rail grooves 22, 22 formed on inner surfaces of a pair of left and right frame side portions 21, 21 forming the main body frame 20. A pair of front and rear rollers 32, 32... Provided on the outer surface of the upper side of the 31, 31 are respectively engaged (see also FIG. 7). The upper arm 15 is pivotally connected to a front portion of the rear body frame 30 via a joint arm 19. FIG. 4 shows the frame lock mechanism 45, and 451 is the upper arm 15
Lock operation lever 453 provided in the upper arm 1
Lock pins 455 protruding from the left and right protrusions 452 are left and right lock plates erected on the front part of the main body frame 20, reference numerals 456 are lock holes thereof, and reference numeral 457 is a key cylinder. The frame lock mechanism 45 operates the lock operation lever 451 so that the left and right lock pins 453, 45
3 to the lock holes 45 of the lock plates 455 and 455.
6 and 456 to fix the upper arm 15 to the main body frame 20 to maintain the use state as shown in FIG. 1 and to release the engagement between the lock pin 453 and the lock hole 456 when folded. I do. Further, the seat 41 has a front portion pivotally connected to the rear body frame 30 by a front link 42, and a rear portion pivotally connected to the rear portion of the main body frame 20 by a rear link 43. Reference numeral 44 denotes a tail light unit. .

In the motorcycle described above, the handlebar 9 is folded rearward, the handle holder 13 is tilted backward, and the upper steering shaft 14 is folded rearward, so that the upper arm 15 and the joint arm 19 as shown in FIG. The main body frame 20 slides rearward with respect to the rear body frame 30 by the engagement between the guide rail grooves 22, 22 and the rollers 32, 32,. At the same time, the front link 42 and the rear link 43 interlocking with this cause the seat 41 to be lowered and the seat 41 to be folded downward.
1 is obtained by the reverse operation, that is, the main body frame 20 slides forward with respect to the rear body frame 30, so that the front-rear length of the vehicle body is increased, and the front link 42 and the rear link 43 Rises, and the sheet 41 is held at the raised position. Then, by operating the lock mechanism 45 provided between the main body frame 20 and the upper arm 15, the use state is maintained as shown in the figure.

In the above-mentioned foldable motorcycle, between the main body frame 20 and the rear body frame 30, as shown in FIG.
Positioning means 50, 60, 70 for regulating the vertical and horizontal directions by engagement in addition to the engaging portions with 2, 32,.
Is provided. That is, in the embodiment, in the folded state and the extended state of the main body frame 20 and the rear body frame 30, the concave and convex engaging portions 50, 60 which are engaged at the positions near the rollers 32, 32 and regulate the vertical direction are configured. In addition, only when the main body frame 20 and the rear body frame 30 are in the stretched state, a slope engaging portion 70 that engages with the front concave-convex engaging portion 50 at the same position and regulates the left-right direction is configured.

In FIG. 5, the guide rail groove 22 is divided into front and rear portions, and the front and rear guide grooves 23 are formed on the inner side surface of the main body frame side portion 21 along the divided guide rail grooves 22 and 22. , 24 are formed. The front and rear ends of the front and rear guide grooves 23 and 24 correspond to FIGS.
As shown in FIG. 14, the engaging recesses 25a, 25b, 26a, and 26b have a reduced width in the vertical direction.
10 and 15, reference numeral 28 denotes a grip portion, and FIG.
Reference numeral 29 denotes a connecting boss portion, and in FIG. 10, reference numeral 201 denotes a frame connecting bolt. On the other hand, as shown in FIG. 5 and FIGS. 16 to 19, a pair of front and rear engaging projections 35 located below the front and rear rollers 32, 32 are provided on the outer side of the upper side of the rear body frame side surface 31. 36 are formed. The engagement projections 35, 36 are provided with the engagement recesses 25a, 25b, 26a,
26b, they are engaged without play in the vertical direction. 16 and 17, 33 is a roller support shaft, 38 and 39 are connection boss portions in FIG.
Reference numerals 01 and 302 denote frame coupling bolts, and reference numeral 311 denotes a window formed on the upper side of the frame side surface 31. As described above, the engaging recesses 25a, 25b, 26a, 26b formed at the front and rear ends of the front and rear guide grooves 23, 24 on the inner side surface of the main body frame side surface portion 21 and having a reduced width in the vertical direction, respectively, and the rear body frame. Rollers 32, 3 in front and behind the side surface 31
The pair of front and rear engaging projections 35 and 36 located below the upper and lower portions 2 constitute the concave and convex engaging portions 50 and 60 for regulating the vertical direction at a total of four places in the front and rear, respectively. You.

As shown in FIGS. 8 and 9, a tapered engagement slope 37 which opens rearward in a plan view is provided in a front engagement projection 35 on the outer side surface of the rear body frame side surface portion 31.
In the inside of the second engagement concave portion 25b from the front of the inner side surface of the main body frame side surface portion 21, an engagement slope 27 that can abut against the engagement slope 37 from the rear is formed. It is provided with a bolt connection by a body. As described above, the engagement slope 37 in the engagement projection 35 in front of the outer side surface of the rear body frame side surface portion 31 and the engagement between the inner side of the second engagement recess 25b from the front of the inner surface of the main body frame side surface portion 21. The joint slope 27 forms a slope engaging portion 70 that regulates the left-right direction at two locations that form a pair on the left and right.

As shown in FIGS. 6 and 7, below the second engagement recess 25b from the front of the main vehicle body frame side surface portion 21, a fuel cock attached to the inner side surface of the rear vehicle body frame side surface portion 31 is provided. A projecting piece 48 is provided to engage with the cock switching lever 47 of 46 to switch the fuel cock 46. Reference numeral 49 denotes an engagement pin provided on the cock switching lever 47 so as to engage with the projection 48.

As described above, the main body frame 20 is extended forward with respect to the rear body frame 30 because the concave and convex engaging portions 50 and 60 for restricting the vertical direction and the slope engaging portion 70 for restricting the horizontal direction are provided. In the used state, as shown in FIGS. 1 and 5, the engagement recesses 25b, 2 having a narrow width in the vertical direction at the rear ends of the guide grooves 23, 24 of the side portion 21 of the main body frame.
6b, the rollers 32, 3 of the rear body frame side surface portion 31 are provided.
(2) The lower front and rear engaging projections 35 and 36 are engaged with each other to regulate the vertical play at a total of four places in the front and rear and left and right directions, and as shown in FIGS. The engaging slope 3 in the engaging convex portion 35 in front of the frame side portion 31.
7, the engagement slope 27 on the inner side of the second engagement recess 25b from the front of the main body frame side surface portion 21 is engaged, and
The play in the left-right direction can be regulated at the location. In this manner, the main body frame 2 is moved forward with respect to the rear body frame 30.
When 0 is extended, the concave / convex engaging portions 50 and 60 and the slope engaging portion 70 are automatically engaged, and the vicinity of the rollers 32 and 32,
That is, in the embodiment, the play in the up-down direction and the left-right direction can be easily regulated at the lower side, so that the load applied to the rollers 32, 32 can be reduced.
Since the rollers 32 and 32 can be dispersed by the slope engaging portions 70, the durability of the rollers 32 and 32 can be improved.

In the folded state in which the main body frame 20 is slid backward with respect to the rear body frame 30,
As shown in FIG. 2, engagement recesses 25 a, 26 having narrow widths in the vertical direction at the front ends of the guide grooves 23, 24 of the side surface portion 21 of the main body frame.
a, rollers 32, 32 of the rear body frame side surface portion 31
The lower front and rear engaging projections 35 and 36 are engaged with each other, so that the vertical play can be regulated at a total of four places in front, back, left and right.

Here, in both the use state and the folded state, as shown in FIG. 10, the front and rear portions of the guide rail groove 22 are formed by the engagement of the concave and convex engaging portions 50 and 60 for positioning in the vertical direction. Roller 32 has a clearance g at the top and the rear roller 32
Has a clearance g below, so that the front and rear rollers 3 along the guide rail groove 22
The rotation of 2, 32 can be done smoothly, without inclination,
Smooth sliding operation is guaranteed. Further, the slope engaging portion 70 for positioning in the left-right direction has a shape corresponding to the main body frame side surface portion 21 on the tapered engagement slope 37 that opens rearward and outward to the rear in the plan view of the rear body frame side surface portion 31. The structure in which the tapered engagement slopes 27 are in contact makes it possible to absorb errors generated in the front-rear direction. Note that the engagement slope 27 may be provided integrally with the side surface portion 21 of the main body frame.

Further, in the embodiment, the side portion 2 of the main body frame is provided.
Positioning means 50, 60 for regulating the vertical and horizontal directions by engaging the guide rail groove 22 and the roller 32 between the inside of the vehicle body 1 and the outside of the rear body frame side surface part 31 and below the roller 32 as described above. , 70 are provided, so that the width direction of the vehicle body frame can be made compact despite being a front-rear sliding body frame. The roller is preferably made of resin, but may be made of metal.

Next, another embodiment of the positioning means in the left-right direction will be described. FIG. 20 shows another embodiment of the inclined surface engaging portion serving as the positioning means in the left-right direction. The inclined surface engaging portion 170 is formed by connecting the end surface of the engaging convex portion 35 on the outer surface of the rear body frame side surface portion 31. An engagement slope 137 tapered obliquely rearward, and a main body frame side 21
It protrudes integrally inside the engagement recess 25b on the inner surface,
And an engagement slope 127 that can contact the engagement slope 137 from behind. FIG. 21 shows an embodiment of a plane engaging portion forming a positioning means in the left-right direction.
The flat engaging portion 270 is separate from an engaging flat surface 237 formed by the end surface of the engaging convex portion 35 on the outer surface of the rear body frame side surface portion 31 and an inner side of the engaging recess 25b on the inner surface of the main vehicle body frame side surface portion 21. Bolted by an object, the engagement plane 23
7 can be slid in parallel from the rear on the inner surface of the inner surface 7
It is composed of FIG. 22 shows another embodiment of the flat engaging portion serving as the positioning means in the left-right direction. The flat engaging portion 370 is formed by the end surface of the engaging convex portion 35 on the outer surface of the rear body frame side surface portion 31. An engagement flat surface 337, and an engagement flat surface 327 integrally projecting inside the engagement recess 25b on the inner surface of the main body frame side surface portion 21 and capable of slidingly contacting the outer surface of the engagement flat surface 337 from behind. It is composed of
As described above, as the positioning means in the left-right direction, inscribed or circumscribed slope engaging portions 70 and 170 and planar engaging portions 27 are used.
0,370.

[0020]

According to the present invention as described above, according to the present invention, a main body frame comprising a left and right pair of members for supporting the front wheel, left
The right and left members of one body frame are composed of a pair of right members and a rear body frame supporting the engine and the rear wheels.
A guide rail groove formed in the left and right of the other of the body frame
The front and rear vehicle body by combination with the roller provided on the member
A foldable motorcycle in which a frame is slidably assembled in the front-rear direction .
In addition, the main body frame
Up and down and left and right between the car and the rear body frame
Positioning means for performing vertical positioning
Means for folding the main body frame and rear body frame
In the extended state and in the extended state,
A concave / convex engaging portion that regulates the vertical direction by engaging
The positioning means for the main body frame and the rear body frame
The slant restricts the left and right direction by engaging in the extended state of the arm.
The engaging portion was formed of a surface. Accordingly, in conjunction with the sliding in the front-rear direction by the guide rail groove and the roller portion, it is possible to easily perform the positioning control in at least one of the vertical direction and the horizontal direction between the main body frame and the rear body frame, and Since the positioning means is engaged by sliding in the front-rear direction, the load applied to the roller can be dispersed by the positioning means in the engaged state, so that the durability of the roller can be improved. In particular, the present invention
In the stretched state of the frame and the rear body frame,
By engagement at the position near the roller by the uneven engagement portion,
The vertical direction can be regulated, and the engagement of the
Therefore, the right and left direction can be regulated, and
In the state, the up-down direction
Only can be regulated.

[Brief description of the drawings]

FIG. 1 is a side view in use showing an example of a foldable motorcycle to which the present invention is applied.

FIG. 2 is a side view of the same folded state.

FIG. 3 is a longitudinal sectional front view of a folded portion of the steering shaft.

FIG. 4 is a plan view showing a frame lock mechanism.

FIG. 5 is an enlarged side view showing the body frame in use.

FIG. 6 is an enlarged view of the main part.

FIG. 7 is a sectional view taken along the line AA of FIG. 5;

FIG. 8 is an enlarged plan view of a main part fracture showing the body frame in use.

FIG. 9 is an enlarged cross-sectional view of a slope engaging portion serving as a positioning means in the left-right direction.

FIG. 10 is an enlarged side view of a main body frame.

11 is a sectional view taken along the line BB of FIG. 10;

FIG. 12 is a sectional view taken along the line CC of FIG. 10;

FIG. 13 is a sectional view taken along the line DD of FIG. 10;

FIG. 14 is a sectional view taken along the line EE of FIG. 10;

FIG. 15 is a sectional view taken along the line FF of FIG. 10;

FIG. 16 is an enlarged side view of the rear body frame.

FIG. 17 is a half plan view of the same.

FIG. 18 is a sectional view taken along the line GG of FIG. 16;

FIG. 19 is a sectional view taken along the line HH of FIG. 16;

FIG. 20 is a cross-sectional view showing another embodiment of a slope engaging portion serving as a positioning means in the left-right direction.

FIG. 21 is a cross-sectional view of a plane engaging portion forming a positioning means in the left-right direction.

FIG. 22 is a cross-sectional view showing another embodiment of the plane engaging portion serving as the positioning means in the left-right direction.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Engine, 3 ... Rear wheel, 5 ... Front wheel, 20 ... Main body frame, 22 ... Guide rail groove, 30 ... Rear body frame,
32 ... roller, 50, 60 ... row positioned in the vertical direction
Cormorant concavo-convex engaging section, the engaging portion of the inclined surface for positioning of 70,170,270,370 ... lateral direction.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62K 15/00

Claims (1)

(57) [Claims] 1. A pair of left and right members supporting a front wheel.
The main body frame and a pair of left and right members
A body frame after supporting a gin and the rear wheel, one of the cars
Guide rail grooves provided on the left and right members of the body frame and other
Square front and rear body frame by a combination of a roller provided on the right and left members of the vehicle body frame a slidably assembled collapsible motorcycle in the front-rear direction, in addition to front and rear of the guide rail groove and a roller portion Directional
The main body frame and the rear body are engaged by sliding.
Performs vertical and horizontal restrictions between the frame
Positioning means, wherein the positioning means with respect to the vertical direction is
Folding state and pulling of the frame and the rear body frame
In the extended state, engage at a position near the roller.
A concave / convex engaging portion for regulating the vertical direction, wherein the positioning means with respect to the horizontal direction is
Engage when the frame and the rear body frame are stretched
To the engaging portion comprising a slope for regulating the lateral direction, this and folding motorcycle frame and wherein the.