JP2000313390A - Mounting structure of rear cushion unit in scooter type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the stroke of a rear cushion unit by providing an opening for inserting a cushion-side bracket on a frame main part, and providing a cushion mounting part swollen upward over the frame main part across the opening part on the frame main part. SOLUTION: A frame main part 24a that is the essential part of the rear of a main frame 21 in a body frame has an opening part 87 for inserting a cushion-side rear bracket 86 provided on the upper end of a rear cushion unit 33. A cushion mounting part 88 swollen upward over the frame main part 24a across the opening part 87 is mounted on the frame main part 24a. The cushion- side bracket 86 is mounted on the cushion mounting part 88. According to this structure, the cushion-side bracket 86 can be set in a higher position, and the stroke of the rear cushion unit 33 is further increased to improve the riding comfort of a driver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a power unit which is supported on a main frame so as to be swingable, a rear wheel is pivotally supported and a lower end of a rear cushion unit is connected to the power unit.
In a scooter-type vehicle in which a cushion-side bracket provided at an upper end of the rear cushion unit is mounted on a cushion mounting portion provided on a frame main portion which is a main portion of a rear portion of the main frame, mounting the rear cushion unit on the main frame It relates to the improvement of the structure.

[0002]

2. Description of the Related Art Conventionally, such a scooter type vehicle is already known, for example, from Japanese Patent Application Laid-Open No. Hei 10-218065.

[0003]

However, in the prior art, the cushion mounting portion is provided on the main frame portion so as to protrude downward from the main frame portion. For this reason, the vertical length of the rear cushion unit is relatively short, and the stroke of the rear cushion unit is relatively small. To improve the ride comfort of the driver, the stroke of the rear cushion unit is made larger. It is desired.

[0004] The present invention has been made in view of the above circumstances, and is intended to increase the stroke of the rear cushion unit to improve the ride comfort of the driver, and to mount the rear cushion unit on a scooter-type vehicle. The purpose is to provide a structure.

[0005]

According to a first aspect of the present invention, a rear wheel is pivotally supported by a power unit which is swingably supported by a main frame, and a lower end of a rear cushion unit. A scooter-type vehicle, wherein a cushion-side bracket provided at an upper end of the rear cushion unit is attached to a cushion mounting portion provided at a frame main portion which is a main portion of a rear portion of the main frame. The frame main portion is provided with an opening through which the hole is inserted, and a cushion mounting portion which rises above the frame main portion over the opening is provided in the frame main portion.

[0006] According to this configuration, the cushion-side bracket provided at the upper end of the rear cushion unit can be set at a higher position, and the stroke of the rear cushion unit is increased to improve the ride comfort of the driver. can do.

[0007] The invention according to claim 2 provides the above-described claim 1.
In addition to the configuration of the invention described in the above, a sub-frame forming a body frame in cooperation with the main frame is fastened to the frame main portion at a position corresponding to a portion where the cushion mounting portion is connected to the frame main portion. According to such a configuration, the strength of the cushion mounting portion protruding from the frame main portion can be reinforced by the sub-frame.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on one embodiment of the present invention shown in the attached drawings.

1 to 24 show one embodiment of the present invention. FIG. 1 is a side view of a scooter type vehicle, FIG. 2 is an enlarged front side view of the scooter type vehicle, and FIG. 3 is a scooter type vehicle. 4 is an enlarged side view of FIG. 3, FIG. 4 is a view taken in the direction of arrow 4 in FIG. 3 in a state where a storage box and a fuel tank are omitted, FIG. 7 is an enlarged side view of the front frame, and FIG.
8 is an enlarged sectional view taken along line 8-8 in FIG. 6, and FIG. 9 is FIG.
9 is an enlarged sectional view taken along line 9-9, FIG. 10 is an enlarged sectional view taken along line 10-10 in FIG. 7, FIG. 11 is an enlarged side view of the rear frame, and FIG.
13 is an enlarged sectional view taken along line 13-13 of FIG. 12, FIG. 14 is a partially cutaway side view showing a swing support portion of the engine to the vehicle body frame, and FIG. Of 15
16 is a side view showing a mounting portion of the rear cushion unit to the vehicle body frame, FIG. 17 is a sectional view taken along line 17-17 of FIG. 16, FIG. 18 is a sectional view taken along line 18-18 of FIG. FIG. 19 is a side view of the subframe, and FIG.
FIG. 21 is an enlarged view of FIG.
Is a sectional view taken along line 22-22 of FIG. 21, and FIG.
FIG. 24 is a view for explaining variation in the position of the head pipe portion with respect to the center line of the rear frame, where FIG. 24A is a side view of the main frame, and FIG. FIG.

Referring to FIG. 1, a body frame F of a scooter type vehicle includes a main frame 21 and a sub-frame 22 fastened to a rear portion of the main frame 21. The main frame 21 is made of aluminum. The front end of a rear frame 24 cast by an aluminum alloy or the like is fastened to the rear end of the front frame 23 cast by an alloy or the like. Will be concluded. That is, the body frame F
The front frame 23 and the rear frame 2 in that order from the front side.
4 and the sub-frame 22 are fastened.

Referring also to FIG. 2, the front frame 23
Has a front wheel WF on a head pipe portion 25 provided at the front end thereof.
Is supported so as to be steerable.
The lower end of the front fork 28 is an axle 31 of the front wheel WF.
And the front fork 28
The other end of the link 29 is connected to the axle 31 at one end to the lower end of the front cushion 3 between the intermediate portion of the front fork 28 in the vertical direction and the intermediate portion of the link 29.
0 is provided. A steering handle 32 is connected to an upper end of the front fork 28.

Referring also to FIGS. 3 and 4, the rear wheel W
A power unit P composed of an engine E disposed on the front side of the rear wheel R and a continuously variable transmission M disposed on the left side of the rear wheel WR is supported at the intermediate portion of the rear frame 24 in the front-rear direction so as to be vertically swingable. You. The engine E is, for example, a water-cooled, single-cylinder, four-cycle engine having cylinders arranged substantially horizontally toward the front of the vehicle body. The continuously variable transmission M is, for example, a belt type.

A rear wheel WR is pivotally supported at the rear of the power unit P. The rear of the power unit P and the main frame 2
A rear cushion unit 33 is provided between the rear portion 3 and the rear frame 24. At the rear of the power unit P, an air cleaner 34 disposed on the upper side of the rear wheel WR is attached.
It is connected to the engine E via a carburetor 35. An exhaust pipe 36 for guiding exhaust gas from the engine E extends from the engine E to the right side of the rear wheel WR.
6 is an exhaust muffler 37 disposed on the right side of the rear wheel WR.
Connected to. Further, a stand 38 is rotatably supported by the engine E, and a radiator 44 is connected to the power unit P
It is arranged on the right side of.

Referring to FIGS. 5 to 7, the front frame 23 includes a head pipe 25 and the head pipe 2.
5 and a pair of left and right floor support frame portions 27 ₁ , 27 ₂ extending rearward from the lower end of the down frame portion 26.
Cast molded.

As shown in FIG. 8, the down frame portion 26 is formed in a groove shape having an open front and a bottom, and a plurality of ribs 26a arranged in the groove are integrated with the down frame portion 26. Is provided.

A pair of left and right floor support frame parts 27 ₁ ,
27 ₂ extends linearly in a groove shape which is open upward are formed respectively. Moreover, both floor supporting frame parts 2
The front ends of 7 ₁ , 27 ₂ are respectively arranged on both sides of the lower end of the down frame portion 26, and a pair of curved portions 50 ₁ , 50 ₂ bulging forward from the lower end front surface of the down frame portion 26.
Through the two floor supporting frame portions 27 ₁ , 27 ₂
Are connected to both sides of the lower end of the down frame portion 26, respectively. Further, the both curved portions 50 ₁ , 50 ₂ are also formed in a groove shape with the upper part opened, and the both curved portions 50 ₁ , 50 _{2 are formed.}
A concave portion 5 which is recessed outwardly
1 are provided.

In FIG. 9, both floor support frame portions 2
7 _1, 27 _2, ribs 52, 52 extending in the front-rear direction is provided integrally respectively. The floor support frame _{2 is provided at} the bottom of both floor support frames 27 ₁ and 27 2.
7 _1, 27 a pair of drainage holes 53, 53 for discharging water entering within ₂ are respectively provided so as to be disposed on opposite sides of the rib 52. Further, the curved portions 50 ₁ , 50
_A drain hole 54 is also provided at the bottom of the _second .

[0018] Both the floor supporting frame part 27 _1, 27 between _two of the rear end portion is integrally connected to each other via the reinforcing frame part 55 which is formed in a substantially U shape which is open upward.

[0019] The rear end portions of both the floor supporting frame part 27 _1, 27 _2, front fastening plate 56 ₁ which is inclined forwardly downwardly,
56 ₂ is provided integrally, both front fastening plate 5
6 _1, 56 _2, bolt insertion holes 57 and 57 are provided in pairs. Thus in one of the front fastening plate 56 ₁ and, as shown in Figure 10, a single fitting recess 58 bolt insertion holes opening to the middle lower surface between the two bolt insertion holes 57 and 57 5
7 ... and provided so as to have an axis parallel to the other of the front fastening plate 56 _2, a pair of fitting recesses 58, 58 which open in the middle lower surface between the two bolt insertion holes 57, 57 It is provided so as to have an axis parallel to the bolt insertion holes 57.

Referring to FIG. 11 and FIG. 12, the rear frame 24 includes a frame main portion 24a formed in a substantially U-shape that is open forward when viewed from above, and a rear portion of the frame main portion 24a. Reinforcing frame part 2 connecting both sides of the intermediate part
4b is integrally formed, and is basically formed by casting so as to be inclined upward.

[0021] On both sides the front frame portion 24a of the rear frame 24, the in front fastening plate 56 _1, 56 ₂ of the rear end of the front frame 23 so as to polymerize the lower, inclined forwardly and downwardly Rear fastening plate parts 61 ₁ and 61 ₂
Are provided integrally.

[0022] Both rear fastening plate 61 _1, 61 _2, respectively corresponding bolt insertion of each pair of bolt insertion holes 57, 57 provided on the front fastening plate 56 _1, 56 ₂ of the front frame 23 Holes 62, 62 are provided. On one of the rear fastening plate 61 _1, as shown in Figure 13, a bolt insertion hole 57 ... axis parallel to the axis of the two bolt insertion holes 6
Single fitting projection 63 projecting from the intermediate portion top surface between 2,62 upward, is protruded so as to fit into the fitting recess 58 provided in the front fastening plate 56 ₁ and the other the rear fastening plate 61 ₂ of the pair of fitting protrusions 63, 63 which projects with a bolt insertion hole 57 ... axis parallel to the axis of the upper surface between the two bolt insertion holes 62, 62 upward , Front fastening plate 5
So as to fit into the fitting recess 58, 58 provided on the 6 ₂ is projected.

Front fastening plate 56₁, 56_TwoAnd those
Front fastening plate 56₁, 56_TwoRear tightening that overlaps from below
Tying part 61₁, 61_TwoMeans the bolt insertion holes 62, 6
3; bolts 64, 64 ... inserted through 62, 63 ...
Screw 65, 65 ...
Will be concluded. Moreover, the front fastening plate 56₁, 56_Two; 61
₁, 61_Two, Each fitting protrusion 63 ...
Are respectively fitted to the floor supporting frame portions 2.
7₁, 27_TwoThe rear end of the rear frame 24 and the front end of the rear frame 24.
At three or more locations of the joint, three locations in this embodiment
Each fitting protrusion 63 is fitted into each fitting recess 58.
become.

[0024] of each plurality (a pair in this embodiment) for fastening the front fastening plate 56 ₁ and the rear fastening plate 61 _1, and the front fastening plate 56 ₂ and the rear fastening plate 61 _2, respectively bolt 64 , 64, and in this embodiment, the extension lines L, L of the pair of bolts 64, 64, as shown in FIG. It is set so as to pass between the upper end of the steering handle 32 supported and the axle 31 of the front wheel WF. Thus, the fitting projections 63 fitted to each other ...
And the fitting recesses 58 are arranged between the pair of bolts 64, 64 and have an axis parallel to the bolts 64, so that the fitting projections 63 and the fitting recesses 5 are provided.
The extension line of the axis line 8 passes between the upper end of the steering handle 32 and the axle 31 of the front wheel WF.

The engine E of the power unit P is supported on the rear frame 24 of the vehicle body frame F via a vibration isolating link 66. The structure of the vibration isolating link 66 is shown in FIGS. It will be explained while doing.

The anti-vibration link 66 is provided on the engine E.
Left and right pair of engine side brackets 67₁, 67_TwoWhen,
Each engine side bracket 67₁, 67_TwoOne end can swing
And the other end of the rear frame 24
Is pivotably connected to the main body 24a and is
Also a pair of left and right links 68 arranged on the front side₁, 68 _Two
And both links 68₁, 68_TwoCross member connecting between
-69 and the reinforcing frame 2 in the rear frame 24
4b so as to contact one of the links 68.₁Set in
And a pair of stopper rubbers 70 and 71 that can be attached.

The engine side brackets 67 ₁ and 67 ₂ are
Are provided in a manner engine E as to protrude upward, these engine side bracket 67 _1, 67 _2, mounting holes 72 and 72 provided coaxially, each mounting hole 7
Rubber bushes 73, 73 are press-fitted into the rubber bushes 2, 72, and a cylindrical spacer 74 is interposed between the rubber bushes 73, 73. Both rubber bushes 73, 73 and spacer 7
4 has a head 7 that engages with the outer surface of _one link 68 _1.
5a is inserted and the other link 68
₂ and the other link 68
_The nut 84 engaging with the outer surface of the _{second 2} is screwed. That is, the bolts 75 which are arranged horizontally is connected to one end of both links 68 _1, 68 ₂ is supported on the engine side bracket 67 _1, 67 ₂ via the rubber bushings 73, 73.

Support holes 76, 76 are provided coaxially on both sides of the intermediate portion of the frame main portion 24a of the rear frame 24, and rubber bushes 77, 77 are provided in each of the support holes 76, 76.
Is press-fitted. Thus to both links 68 _1, 68 provided at _two of the other end is parallel to the bolt 75 bolt 78,7
8 is swingably supported by the frame main portion 24a via the rubber bushes 77, 77.

[0029] In one of the link 68 _1, bolt 75
A box-shaped rubber support portion 79 is provided on the front side of a straight line connecting the axis of the bolt 78 and the stopper frame 70 attached to the rubber support portion 79. Are formed on the lower surface of the reinforcing frame portion 24b. In the link 68 _1, the straight line connecting the axis of the bolt 75 and the bolt 78 on the rear side is provided with a box-shaped rubber support portion 80, is brought into contact with the stopper rubber 71 to be attached to the rubber support portion 80 A contact surface 82 is formed on the lower surface of the reinforcing frame portion 24b.

The cross member 69 which connects the two links 68 _1, 68 ₂ is formed in a substantially U shape open downward, and the carburetor 35 disposed on the rear side of both links 68 _1, It is arranged so as to straddle an intake pipe 83 connecting to the engine E.

In the anti-vibration link 66, the load acting on the bolt 75 from the engine E of the power unit P is absorbed by the elastic deformation of the rubber bushes 73, 73, and the stopper rubbers 70, 71 abut. Face 8
It is absorbed by being elastically deformed by being pressed against the first and second members 82, and is also absorbed by the elastic deformation of the rubber bushes 77, 77.

Main frame 2 in body frame F
1 is attached to the rear end of the rear cushion unit 33 whose lower end is connected to the power unit P. The mounting structure of the upper end of the rear cushion unit 33 to the main frame 21 is shown in FIGS. This will be described with reference to FIG.

At the upper end of the rear cushion unit 33,
A cushion-side bracket 86 formed in a substantially U-shape that is open upward is provided. On the other hand, at the rear of the main frame 21, that is, at the rear of the frame main portion 24a, which is the main portion of the rear frame 24, the rear cushion unit 3
3, the cushion-side bracket 8
An opening 87 is provided to allow the passage 6 to pass therethrough.

The frame main portion 24a is integrally provided with a cushion mounting portion 88 which rises above the frame main portion 24a over the opening 87, and the cushion side bracket 86 is provided with a cushion mounting portion. 88
Are arranged so as to sandwich them.

A rubber bush 90 is press-fitted into a mounting hole 89 provided in the cushion mounting portion 88, and a bolt 91 penetrating the rubber bush 90 is attached to the cushion side bracket 8
6 is screwed. That is, the cushion side bracket 86
Is attached to the cushion attachment portion 88 via the rubber bush 90.

19 and 20, the sub-frame 22 is formed by processing a metal pipe, and has a frame portion 92 formed in a substantially U-shape with an open front when viewed from above. And a frame portion 92 extending vertically.
A pair of rising portions 93, 9 whose intermediate portions are welded to the front end of
3 and a pair of reinforcing portions 9 whose one ends are welded to the lower ends of the rising portions 93, 93 and whose other ends are welded to the frame portion 92.
4, 94, and are formed symmetrically with respect to a center line extending in the front-rear direction of the body frame 21.

Bolt insertion holes 97 are provided at the lower ends of the rising portions 93, 93, and at one ends of the reinforcing portions 94, 94 overlapping the lower ends of the rising portions 93, 93, respectively. , 94, the bolt insertion holes 9
8 are provided. On the other hand, a pair of bosses 99, 99 corresponding to both bolt insertion holes 97, and a pair of bosses 100, 100 corresponding to both bolt insertion holes 98, are formed in the frame main portion 24a of the rear frame 24. Are integrally provided so as to protrude upward from the frame main portion 24a, and are provided by bolts 101 and nuts 102.
The sub-frame 22 includes the boss portions 99, 99;
Attached to 100. Moreover, the bosses 99 and 100 disposed on the left side of the frame main portion 24a are disposed at positions corresponding to the portion where the cushion mounting portion 88 is connected to the frame main portion 24a. It is fastened to the frame main portion 24a at a position corresponding to the portion 88 connected to the frame main portion 24a.

Rear frame 24 and subframe 22
Has a storage box 39 that can store helmets,
It is supported so as to be disposed above the engine E and the carburetor 35.

As shown in FIG. 15, a pair of leg portions 10 projecting downward are provided at the lower front end of the storage box 39.
5,106 are protruded. On the other hand, on the upper surface of the reinforcing frame portion 24b in the rear frame 24, each leg 10
5 and 106 are provided, respectively, and the leg portions 105 and 106 received by the support concave portions 107 and 108 are connected to the reinforcing frame portion of the rear frame 24 by bolts 109 and 109 and nuts 110 and 110. 24b. In order to avoid interference with the intake pipe 83 and the carburetor 35 disposed below the reinforcement frame portion 24b and the storage box 39, the reinforcement frame portion 24b and the bottom portion of the storage box 39 face forward in the traveling direction of the scooter type vehicle. It is formed so as to incline to the lower right when it is in the upright position.

Flat mounting plate portions 111 are provided at the upper ends of the both rising portions 93 in the sub-frame 22, and nuts 112 are welded to the mounting plate portions 111, respectively. On these mounting plate parts 111 ...
The rear end of the storage box 39 is mounted on the subframe 22 by mounting the rear ends of the storage box 39 and tightening bolts 113 (see FIG. 1) that are screwed into the nuts 112, respectively.

In this way, the storage box 39 is supported by the rear frame 24 and the sub-frame 22 above the engine E and the carburetor 35. The cross member 69 of the vibration-proof link 66 is 39 and the engine E.

A fuel tank 40 is supported on the sub-frame 22 behind the storage box 39. In order to support the fuel tank 40, a mounting plate 114 is welded to the upper surface of the rear end of the frame 92 in the subframe 22, and mounting plates 115, 115 are welded to both sides of an intermediate portion of the frame 92. The mounting plate 114 has a pair of nuts 116, 116.
Are welded, and nuts 117 are welded to the mounting plates 115, 115, respectively. Thus, the rear portion of the fuel tank 40 arranged in the frame portion 92 has two nuts 116, 1
16 are supported on the mounting plate 114 by bolts 118 (see FIGS. 1 and 2), and both sides of the fuel tank 40 are bolts 119 that are respectively engaged with the nuts 117 (see FIGS. 1 and 2). 1 and 2) and the mounting plate 11
5,115 supported.

The vehicle body frame F is covered with a vehicle body cover 41 made of synthetic resin.
A leg shield 41a that covers the front of the driver's feet, a step floor 41b on which the driver's feet are placed, and an undercover 41c that covers below the step floor 41b;
And a side cover 41d that covers a rear portion of the vehicle body from both sides.

Rear frame 24 and subframe 22
Most of the storage box 39 supported above and the fuel tank 40 supported on the sub-frame 22 are covered with the side cover 41d.
Is mounted on the upper part of the side cover 41d so as to be openable and closable. The fuel injection cap 40a of the fuel tank 40 is provided with a side cover 41.
It is arranged so as to protrude upward from the upper part of d.

With particular attention to FIG.
A mounting plate portion 45 is provided integrally with the back surface of the head pipe portion 25 at an interval facing the back surface of the head pipe portion 25. The mounting plate portion 45 is formed in a substantially U-shape with an open lower portion. The nut support member 46 is fitted from above. Further, a nut 47 disposed between the back surface of the head pipe 25 and the mounting plate 45 is welded to the nut support member 46. On the other hand, a hook 48 for engaging with a shopping bag or the like abuts on a portion of the vehicle body cover 41 corresponding to the mounting plate portion 45 of the leg shield 41a, and the hook 48, the leg shield 41a, the nut support member 46, and the A screw member 49 inserted into the plate portion 45 and engaged with the hook 48 is screwed to the nut 47.

21 to 23, the front frame 2
3 between the two floor support frame portions 27 ₁ and 27 ₂ with a space in the front-rear direction.
1,122 are passed.

[0047] the portions of both the floor supporting frame part 27 _1, 27 ₂ of the front toward the bolt insertion holes 123, 123 are provided, nut 124, 124 corresponding to those of the bolt insertion holes 123, 123 are welded The substantially U-shaped nut support members 125, 125
_1, 27 ₂ is fitted from the side on. Thus, on the nut support members 125, 125, the undercover support members 126, 126, both ends in the longitudinal direction of the floor support plate 121, and both sides near the front of the step floor 41b are placed. floor supporting plates 121 and the under cover supporting member 126, 126, by bolts 127 and 127 is screwed into the nut 125, 125, are fastened to the floor supporting frame portions 27 _1, 27 _2. Moreover, the bolt 12 is provided on the step floor 41b.
Recesses 128, 128 for accommodating the heads of the bolts 127, 127 are provided so as to prevent the heads of the bolts 127, 127 from projecting upward.

A raised portion 121a is provided at the center of the floor support plate 121 in the longitudinal direction, and the center of the front end of the step floor 41b is supported by the raised portion 121a together with the lower end of the leg shield 41a.

The floor support plate 122, which supports the step floor 41b from below along with the floor support plate 121, has the same structure at both ends in the longitudinal direction as the floor support plate 121.
Along with the floor supporting frame portions 27 ₁ and 27 ₂ , the concave portion 1 for accommodating the heads of the bolts 129 and 129
30 and 130 are provided on the step floor 41b. The Thus to rear side of the portion of the floor supporting frame part 27 _1, 27 _2, bolt insertion holes 140, 140 are provided for allowing insertion of the bolts 129, 129.

The under cover 41c is attached to the front frame 2
3 are arranged so as to cover both floor support frame portions 27 ₁ and 27 ₂ from below, and are fastened to the undercover support members 126 and 126 by bolts 131 and nuts 132.

The two floor supporting frame portions 27 ₁ , 27
A box-shaped container 133 having an open top is disposed between the _two . On both sides of the upper end of the case 133, support flanges 133 projecting toward both floor support frame portions 27 ₁ and 27 ₂ are provided.
a, 133b are provided integrally, and their support flanges 13 are provided.
Recesses 134, 13 provided at the outer ends of 3a, 133b
5 is received at the inner upper edges of both floor support frames 27 ₁ , 27 ₂ .

Further, a support flange portion 13 mounted on the lower upper surface of the down frame portion 26
3c is integrally provided, is inserted through the support flange portion 133c, and is inserted into a bolt insertion hole 134 provided at a lower portion of the down frame portion 26;
The support flange 133c is fastened to the lower portion of the down frame 26 by the nut 136 screwed to the bolt 135.

Further, on the lower rear end of the storage case 133, the support flange 1 placed on the center of the reinforcing frame 55 in the width direction is provided.
33d are integrally provided, are inserted through the support flange 133d, and are inserted through bolt insertion holes 137 provided at the center in the width direction of the reinforcing frame 55.
The support flange 133d is fastened to the center in the width direction of the reinforcing frame 55 by the nut 38 and the nut 139 screwed to the bolt 138.

A battery 143 is accommodated in a portion near the front in the storage space 133. Hooks 144, 145 engaged with a storage case 133 before and after this battery 143.
Then, the battery 143 is fixedly arranged in the storage case 133 by engaging both ends of the belt 146 which is hung on the battery 143.

A radiator reserve tank 147 is fixedly disposed in the storage space 133 behind the battery 143.

An opening 148 is provided in the center of the step floor 41b at a position corresponding to the storage space 133, and the opening 148 can be opened and closed by a lid 149 fastened to the step floor 41b by a screw member 150. When closed, the upper surface of the lid 149 in the closed state
b is flush with the upper surface.

Next, the operation of this embodiment will be described. The body frame F of this scooter type vehicle is composed of a front frame 23, a rear frame 24 and a sub-frame 22 fastened to each other.
At least one of the front frames 23 and 24, in this embodiment, the front frame 23 and the rear frame 24 are formed by casting. Therefore, any of the front frame 23 and the rear frame 24 that are cast
By changing the part of the body frame and sharing it with many types of motorcycles in which the model is made different, the design and manufacturing cost of the body frame can be reduced by changing the model. Moreover, it is possible to assemble parts for each of the frames 23, 24 and 22 by modularizing each of the frames 23, 24 and 22 and assemble the three modules after completion of assembly into a scooter type. Since the motorcycle can be assembled, it is possible to contribute to improvement of the assembling efficiency of the scooter type vehicle.

The front frame 23 is cast and formed integrally with the head pipe portion 25, the down frame portion 26 and the floor support frame portions 27 ₁ and 27 _2. is fastened to the rear end of the frame portion 27 _1, 27 _2, since the sub-frame 22 formed by processing a metal pipe is fastened to the rear end of the rear frame 24, the design, manufacturing cost is not applied much subframe 22 With regard to the above, it is possible to easily cope with a model change by processing a metal pipe.

A pair of left and right flows provided in the front frame 23
A Support frame 27₁, 27_TwoAnd the rear frame 24
When fastening with the floor support frame 27₁, 2
7_TwoFront fastening plate 56 provided at the rear end₁, 56
_TwoA front fastening plate provided at the front end of the rear frame 24;
Part 56₁, 56_TwoRear fastening plate part 61 which overlaps with₁, 61
_TwoAre fastened, but the front fastening plate 56₁, 56
_TwoAnd rear fastening plate 61 ₁, 61_TwoFIG. 24 (a)
As shown in the figure, both are formed to incline forward
ing. Therefore, both fastening plate portions 56₁, 56_Two; 61
₁, 61_TwoHead pipe part 2 to a plane parallel to the fastening surface of
5 and the projection view of the fastening surface shown in FIG.
As described above, the fastening plate portion 56₁, 56_Two; 61₁, 61_TwoTightening
The connection surface is located at a position relatively close to the head pipe section 25
Will be done. Therefore, as shown in FIG.
The front fastening plate 56 of the front frame 23₁, 56_TwoWhat
Rear fastening plate 61 on the rear frame 24 side₁, 61_Twoof
An assembly error occurs, and the widthwise center line C of the rear frame 24 is
The position of the head pipe 25 is not inclined with respect to
Even if it is
Displacement amount δ of the position of the head pipe portion 25₁, Δ_TwoThe ratio
The front wheel WF and the rear wheel WR can be kept relatively small.
Can improve the accuracy of alignment with the car body
You.

[0060] Moreover each pair of fastening the front fastening plate 56 ₁ and the rear fastening plate 61 _1, and the front fastening plate 56 ₂ and the rear fastening plate 61 _2, respectively bolt 6
4, 64, the extension L of at least one axis, in this embodiment, the extension L, L of the axis of the pair of bolts 64, 64.
The steering handle 32 supported by the head pipe portion 25
Is set so as to pass between the upper end of the front wheel WF and the axle 31 of the front wheel WF.
, The displacement of the position of the head pipe portion 25 with respect to the center line C in the width direction of the rear frame 24 even if an error in assembling the rear frame 24 to the front frame 23 occurs. δ ₁ and δ ₂ can be kept smaller.

On the other hand, assuming that the fastening surfaces at the rear end of the front frame 23 and at the front end of the rear frame 24 are not horizontal as shown in FIG. Rear end of frame 23 and rear frame 2
4 to a plane parallel to the fastening surface at the front end of the head pipe portion 25
On the projection of the fastening surface, as shown in FIG. 25B, the fastening surface is disposed at a position relatively separated from the head pipe portion 25, and the rear frame is connected to the front frame 23. When an assembly error of 24 occurs, the displacement amounts δ ₁ and δ ₂ of the position of the head pipe portion 25 with respect to the center line C in the width direction of the rear frame 24 become relatively large.

[0062] Since the rear fastening plate 61 _1, 61 ₂ on the front fastening plate 56 _1, 56 ₂ are polymerized from below, the floor supporting frame portions 27 _1, 27 rear frame 24 to the rear end above the ₂ There is no need to secure space for placement. Therefore, the step floor 41b is connected to the floor support frame 2
7 _1, 27 can be placed up to ₂ of the rear end upper, it is possible to set a large space of the step floor 41b.

The floor support frame portions 27 ₁ , 27 ₂
Are provided at the rear end of the rear frame 24.
Are fitted to the fitting recesses 58.
Are protruded, so that the assembly accuracy when the front frame 23 and the rear frame 24 are fastened to each other and assembled can be improved.

Moreover, the floor support frame portions 27 ₁ , 27
_The fitting recesses 58 and fitting projections 63 are arranged at a plurality of three or more places of the fastening portion at the rear end of the rear end and the front end of the rear frame 24, and in this embodiment, at three places.
The assembly accuracy of the front frame 23 and the rear frame 24 can be further improved.

In the front frame 23, the down frame portion 26 is formed in a groove shape that is open forward and downward, so that the front wheel WF can be moved closer to the down frame portion 26 without reducing the cross-sectional shape of the down frame portion 26. The wheel base can be shortened while avoiding interference between the front wheel WF and the down frame portion 26 and ensuring a sufficient space for the step floor 41b.

A pair of left and right floor support frame portions 27
_{Since 1} and 27 ₂ are each formed in a groove shape having an open top, the two floor supporting frame portions 27 ₁ and 27 ₂ are bent by the action of an external force acting on the body frame F so as to change the upper opening area thereof. By doing so, the ride comfort can be improved.

Moreover, the floor support frame portions 27 ₁ , 27
₂ is provided with ribs 52 extending in the front-rear direction, so that the two floor support frame portions 27 ₁ and 27 ₂ can be bent by the action of an external force, while the two floor support frame portions 27 ₁ and 27 _{2 are provided.} Extremely low rigidity can also be prevented.

Further, the floor support frame portions 27 ₁ , 27
₂ are arranged on both sides of the lower end of the down frame 26, respectively, so that the step floor 41b can be arranged to both sides of the lower end of the down frame 26, and the step floor 41b can be arranged without increasing the wheel base.
Can be sufficiently secured on the front side.

Moreover, the floor support frame portions 27 ₁ , 27
₂ through a pair of curved portions 50 ₁ and 50 ₂ bulging forward from the lower front surface of the down frame portion 26,
Since a pair of floor support frame portions 27 that are linearly provided on both sides of the lower end of the down frame portion 26,
_1, 27 the front end of the ₂ Despite being arranged, the down frame portion 26 and both the floor supporting frame part 27 _1, 27 ₂ of the connecting portion, i.e. both flexure 50 _1,
50 ₁ so as to inflate the front side, the strength of the connecting portion can be sufficiently enhanced.

In addition, the concave portions 51 provided on the inside portions of the curved portions 50 ₁ and 50 ₂ facing each other, respectively.
So as to secure an interval between the front wheel WF and the front wheel WF.
Can be arranged close to the curved portions 50 ₁ and 50 ₂ ,
Therefore, it is possible to prevent the wheel base from becoming large by connecting the front ends of the floor support frame portions 27 ₁ and 27 _{2 to} the down frame portion 26 via the curved portions 50 ₁ and 50 _2. .

[0071] The engine E in the power unit P in the vibration damping link 66 swingably supported on the body frame F, a pair of left and right engine side bracket provided in the engine E 67 _1, 67 ₂ and the vehicle body frame F swingably cross member 69 for connecting the pair of left and right links 68 _1, 68 ₂ while connecting is formed in a substantially U-shape opened downward, both links 68 _1, 68 carburetor ₂ is disposed on the rear side of the 35 When, it is arranged at a position straddling the front side of the intake pipe 83 of both links 68 _1, 68 ₂ which connects between the engine E. Therefore, the vaporizer 35 is both links 68 _1, 68 the degree of freedom in arrangement of the carburetor 35 as compared to those arranged on the front side than the ₂ becomes high.

Further, the engine E is a four-stroke engine arranged substantially horizontally. The cross member 69 is arranged between the engine E and the storage box 39 attached to the vehicle body frame F below the seat 42. When securing the free operation of the cross member 69 by avoiding interference with the storage box 39, it is possible to prevent the position of the seat 42 from being raised.

Further, a frame main portion 24a, which is a main portion of the rear portion of the main frame 21 in the body frame F,
An opening 87 through which a cushion-side bracket 86 provided at the upper end of the rear cushion unit 33 is inserted is provided, and a cushion mounting portion 88 that rises above the frame main portion 24a over the opening 87 is formed on the frame main portion 24a.
And the cushion-side bracket 86 is attached to the cushion attachment portion 88, so that the cushion-side bracket 86 can be set at a higher position, and the stroke of the rear cushion unit 33 can be increased to increase the driver's stroke. Riding comfort can be improved.

Further, since the sub-frame 22 forming the body frame F in cooperation with the main frame 21 is fastened to the main frame 21 at a position corresponding to the portion where the cushion mounting portion 88 is connected to the frame main portion 24a. The strength of the cushion mounting portion 88 protruding from the frame main portion 24 can be reinforced by the sub-frame 22.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible to do.

[0076]

As described above, according to the first aspect of the present invention, the stroke of the rear cushion unit can be increased by setting the cushion-side bracket provided at the upper end of the rear cushion unit at a higher position, The ride comfort of the driver can be improved.

According to the second aspect of the invention, the strength of the cushion mounting portion protruding from the frame main portion can be reinforced by the sub-frame.

[Brief description of the drawings]

FIG. 1 is a side view of a scooter type vehicle.

FIG. 2 is an enlarged front side view of the scooter type vehicle.

FIG. 3 is a rear enlarged side view of a scooter type vehicle.

FIG. 4 is a view taken in the direction of arrow 4 in FIG. 3 in a state where a storage box and a fuel tank are omitted.

FIG. 5 is a perspective view in a state where a front frame and a rear frame are separated from each other.

FIG. 6 is an enlarged side view of the front frame.

FIG. 7 is a view taken in the direction of arrow 7 in FIG. 6;

FIG. 8 is an enlarged sectional view taken along line 8-8 of FIG. 6;

FIG. 9 is an enlarged sectional view taken along line 9-9 of FIG. 7;

FIG. 10 is an enlarged sectional view taken along line 10-10 of FIG. 7;

FIG. 11 is an enlarged side view of the rear frame.

FIG. 12 is a view taken in the direction of arrow 12 in FIG. 11;

FIG. 13 is an enlarged sectional view taken along line 13-13 of FIG.

FIG. 14 is a partially cutaway side view showing a swing support portion of the engine to the vehicle body frame.

FIG. 15 is a sectional view taken along line 15-15 of FIG. 14;

FIG. 16 is a side view showing a mounting portion of the rear cushion unit to the vehicle body frame.

FIG. 17 is a sectional view taken along line 17-17 of FIG. 16;

FIG. 18 is a sectional view taken along line 18-18 of FIG. 17;

FIG. 19 is a side view of the subframe.

FIG. 20 is a view as viewed in the direction of arrow 20 in FIG. 19;

FIG. 21 is an enlarged view as viewed from the direction of arrow 21 in FIG. 1;

FIG. 22 is a sectional view taken along line 22-22 of FIG. 21;

FIG. 23 is a sectional view taken along line 23-23 of FIG. 22;

FIG. 24 is a view for explaining variation in the position of the head pipe portion with respect to the center line of the rear frame,
(A) is a side view of the main frame, (b) is B of (a).
It is an arrow view.

FIG. 25 is a view corresponding to FIG. 24 in a state where the fastening surfaces of the front frame and the rear frame are substantially horizontal,
(A) is a side view of the main frame, (b) is B of (a).
It is an arrow view.

[Explanation of symbols]

 21: Main frame 22: Sub frame 24a: Frame main part 33: Rear cushion unit 86: Cushion side bracket 88: Cushion mounting part 87: Opening F: Body frame P ・ ・ ・ Power unit WR ・ ・ ・ Rear wheel

Claims (2)

[Claims] A power unit (P) swingably supported by a main frame (21) supports a rear wheel (WR) and a lower end of a rear cushion unit (33). A cushion-side bracket (86) provided at an upper end of the unit (33) is provided with a cushion mounting portion (88) provided on a frame main portion (24a) which is a main portion of a rear portion of the main frame (21).
An opening (87) through which the cushion-side bracket (86) is inserted in the scooter type vehicle attached to the vehicle
Is provided in the frame main portion (24a), and a cushion mounting portion (88) that rises above the frame main portion (24a) across the opening (87) is provided in the frame main portion (24a). A mounting structure for a rear cushion unit in a scooter-type vehicle. 2. A sub-frame (22) forming a body frame (F) in cooperation with the main frame (21).
The scooter-type vehicle according to claim 1, wherein the vehicle is fastened to the frame main portion (24a) at a position corresponding to a portion of the cushion attachment portion (88) connected to the frame main portion (24a). Mounting structure of the rear cushion unit.