CN1903646A

CN1903646A - Frame structure of two-wheels motorcycle

Info

Publication number: CN1903646A
Application number: CN 200610088509
Authority: CN
Inventors: 池田英喜; 山口正昭
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2005-07-28
Filing date: 2006-06-01
Publication date: 2007-01-31
Anticipated expiration: 2026-06-01
Also published as: JP2007030776A; CN100506631C; JP4620539B2; BRPI0603012B1; MY144830A; BRPI0603012A

Abstract

The invention miniaturizes a pivot plate and to enhance the rigidity by improving a frame structure of a motorcycle. The motorcycle comprises a main frame 12 extending backward and downward in the oblique direction from a head pipe, rear frames 21, 22 which are connected to a rear portion of the main frame 12 and extend backward and upward in the oblique direction, and an engine unit 18 supported by a lower portion of the main frame 12. A pivot pipe 114 is provided on a back side 13a of a pivot plate 13 provided on a rear lower portion of the main frame 12, and a rear fork 47 is supported by the pivot pipe 114 in a swinging manner.

Description

The body frame structure for automotive of two-wheeled motorcycle

Technical field

The present invention relates to the improvement that the body frame structure for automotive to two-wheeled motorcycle carries out.

Background technology

As everyone knows, the body frame structure for automotive of existing two-wheeled motorcycle is the rear portion that pivot plate is installed in main car frame, will be pivotally mounted on this pivot plate (for example, with reference to patent documentation 1: No. the 3548173rd, Japanese patent gazette).

In Fig. 2 of patent documentation 1 and Fig. 5, record following content, pivot plate 17 is installed in the rear portion of the main car frame 13 that constitutes vehicle frame, bolster 20 is installed on this pivot plate 17, the back vent 21 of supporting wheels is installed on this bolster 20 in the mode that can freely swing up and down.

Pivot plate 17 is made of with the connection board 19 that is connected these

flat parts

18,18 left and right

flat part

18,18, and bolster 20 is mounted thereto in the mode that connects left and right

flat part

18,18.

Because bolster 20 is connected, so left and right

flat part

18,18 needs very big width on the pivot plate 17, become big because the front and back of

flat part

18,18 are long, so, cause the volume of pivot plate 17 to become big.

In addition, because pivot plate 17 is by back vent 21 supporting wheels, so effect thereon has very big load, so people require further to improve its rigidity.

Summary of the invention

The objective of the invention is to by the body frame structure for automotive of two-wheeled motorcycle being improved the volume that reduces pivot plate and being improved rigidity.

The feature of technical solution of the present invention 1 is: possess the main car frame that extends to the oblique back lower place from push pipe, the power unit car that is connected and reaches the lower support of passing through main car frame with the rear portion of this main car frame to the back vehicle frame that extend oblique back upper place, pivot plate is arranged on the rear lower of main car frame, pivot tube is arranged on the back side of this pivot plate, supports back vent freely by this pivot tube swing.

Owing to the back side that pivot tube is arranged on pivot plate, so, compare with the situation that makes pivot tube connect left and right sides pivot plate in the past, can shorten the front and back width of pivot plate.In addition, can be with the rear support pivot tube of whole pivot plate, it is very firm that the supporting of pivot tube becomes, and improved the rigidity of pivot plate itself.

The feature of technical solution of the present invention 2 is: pivot plate possesses the relative pair of plates portion and the connecting panel of the rear end that is connected these flat parts, and the uncovered shape of cross section in pivot plate the place ahead is roughly " U " font, on the back side of connecting panel, breach is set, pivot tube is entrenched in this breach.

Because pivot tube is entrenched in the breach on the back side that is arranged on connecting panel, so, can further reduce to install the front and back length of the pivot plate of pivot tube.In addition since in breach chimeric pivot tube, so being connected of pivot plate and pivot tube becomes very firm, and, improved the rigidity of pivot plate.

The feature of technical solution of the present invention 3 is: the pars intermedia that will be configured in the both sides of main car frame and connect a pair of link of back vehicle frame and pivot plate is connected on the main car frame, and the front end of these links is connected on the pivot tube on the back side that is arranged at pivot plate at least.

Because except with the main car frame supporting, also use and main car frame bonded assembly link supporting pivot tube, so, the rigidity of the hinge portion that constitutes by pivot plate and pivot tube can further be improved.

The feature of technical solution of the present invention 4 is: with the bottom rear support silencer of pivot plate.

Because the back side, bottom of pivot plate is in the position near car body central authorities, is from the near position of silencer, so the support plate of supporting silencer can miniaturization.

The feature of technical solution of the present invention 5 is: by pivot tube and back vehicle frame supporting back seat pedal bracket, and back seat pedal bracket supporting co-driver is placed the back seat pedal of pin.

Because by pivot tube and back vehicle frame supporting back seat pedal bracket, so, can support the back seat pedal bracket more reliably.

Technical solution of the present invention 1 because pivot tube is arranged on the back side of pivot plate, supports back vent freely by this pivot tube swing, so, can shorten the front and back width of pivot plate, can reduce the volume of pivot plate.In addition, can support pivot tube securely by the rear support pivot tube of whole pivot plate, and improve the rigidity of pivot plate itself.

Technical solution of the present invention 2, because pivot plate possesses the relative pair of plates portion and the connecting panel of the rear end that is connected these flat parts, and the uncovered shape of cross section in its place ahead is roughly " U " font, on the back side of connecting panel, breach is set, pivot tube is entrenched in this breach, so, can reduce to install the front and back length of the pivot plate of pivot tube, can make the hinge portion miniaturization that constitutes by pivot plate and pivot tube.

In addition, owing to,, and can improve the rigidity of pivot plate so being connected of pivot plate and pivot tube becomes very firm to the chimeric pivot tube of breach.

Technical solution of the present invention 3, because the pars intermedia that will be configured in the both sides of main car frame and connect a pair of link of back vehicle frame and pivot plate is connected on the main car frame, the front end of these links is connected on the pivot tube on the back side that is arranged at pivot plate at least, so, except supporting with main car frame, also use and main car frame bonded assembly link supporting pivot tube, so, the rigidity of the hinge portion that constitutes by pivot plate and pivot tube can further be improved.

Technical solution of the present invention 4 owing to use the bottom rear support silencer of pivot plate, so the back side, bottom of pivot plate and silencer lean on very closely, can make the support plate miniaturization of supporting silencer.

Technical solution of the present invention 5, owing to support the back seat pedal bracket with pivot tube and back vehicle frame, so, can support the back seat pedal more reliably.

Description of drawings

Fig. 1 is the lateral plan that possesses the two-wheeled motorcycle of body frame structure for automotive of the present invention.

Fig. 2 is the birds-eye view at the main position of two-wheeled motorcycle of the present invention.

Fig. 3 is the lateral plan at the main position of two-wheeled motorcycle of the present invention.

Fig. 4 is the lateral plan at the main position of vehicle frame of the present invention.

Fig. 5 is the block diagram at the main position of vehicle frame of the present invention.

Fig. 6 is the view of observing along 6 directions of arrow among Fig. 3.

Fig. 7 is the 7-7 line side cross sectional view along Fig. 4.

Fig. 8 is the main position lateral plan of other form of implementation of expression pivot plate of the present invention.

[nomenclature]

10: two-wheeled motorcycle

11: push pipe

12: main car frame

13: pivot plate

13a: the back side

13b: breach

13D, 13E: flat part

13F: connecting panel

18: power unit

21,22: the back vehicle frame

34: link (auxiliary vehicle frame)

36,37: the back seat pedal

41,42: the pedal bearing support

47: back vent

63: silencer

114: pivot tube

165: the hinge portion

The specific embodiment

With reference to the accompanying drawings preferred forms of the present invention is described.Figure is a direction of observation with the symbol direction.

Fig. 1 is the lateral plan that possesses the two-wheeled motorcycle of body frame structure for automotive of the present invention, two-wheeled motorcycle 10 is a kind of such vehicles: reach the pivot plate 13 supporting power units 18 that are installed in the rearward end of this main car frame 12 downwards in the mode of extending by 1 main car frame 12 that extends to the oblique back lower place from push pipe 11, this power unit 18 is made of driving engine 16 and change-speed box 17, fuel tank 23 is installed in double-type back, left and right sides vehicle frame 21, the 22 (symbol 21 of a side in face of only showing that extends to oblique back upper place from the rear portion of main car frame 12.) on, boot 24 is installed on this fuel tank 23 and the

back vehicle frame

21,22, lap siding vehicle seat 26 is installed on this boot 24 freely with opening and closing.

Push pipe 11 is a kind of like this parts, and promptly front fork 31 is installed on the push pipe 11 in mode capable of free rotation, and front-wheel 28 is bearing in the lower end of front fork 31, and bar-handle 32 is bearing in the top of front fork 31.

On pivot plate 13 and back

vehicle frame

21,22, set up the double-type

auxiliary vehicle frame

34,34 in the left and right sides (symbol 34 of a side in face of only showing.), simultaneously, on pivot plate 13 and

back vehicle frame

21,22 the double-type

pedal bearing support

41,42 in the left and right sides is installed also, the double-type

pedal bearing support

41,42 in this left and right sides is respectively applied for supporting with the double-type

back seat pedal

36,37 in the left and right sides of the taking advantage of personnel to use (symbol 36 of a side in face of only showing.)。

Above-mentioned push pipe 11, main car frame 12, pivot plate 13,

back vehicle frame

21,22 and auxiliary vehicle frame the 34, the 34th, the parts of formation vehicle frame 45.

Pivot plate 13 is a kind of like this parts, and promptly back vent 47 is installed on the pivot plate 13 in the mode that can freely swing by pivot tube described later, and the rear end of this back vent 47 is used for supporting wheels 46.

Driving engine 16 has the cylinder portion 50 that its front portion roughly is level, is connected with aspirator system 52 and exhaust gear 53 on the cylinder cap 51 that this cylinder portion 50 is possessed.

Aspirator system 52 has: be installed in the airfilter 55 and the one-piece type throttle valve body 57 of nozzle of main car frame 12 front portions, an end of the throttle valve body 57 that this nozzle is one-piece type is connected on this airfilter 55 and the other end is connected on the cylinder cap 51 via aspirate tube 56.

Exhaust gear 53 is connected freeing pipe 61 on the cylinder cap 51, is constituted at the Catalyst 62 of the half-way setting of this freeing pipe 61 and with the rearward end bonded assembly silencer 63 of freeing pipe 61 by the one end, and silencer 63 is configured in the rear of power unit 18.

Because Catalyst 62 is configured in the below of cylinder portion 50 and in the space 64 that the place ahead of crankcase 65 described later is vacated, so it is higher that it is liftoff.

Power unit 18 has crankcase 65, and main pedal 66, the 66 (symbol 66 of a side in face of only showing that chaufeur is used is installed in the mode that extends out to both sides in the bottom of this crankcase 65.), in the following rearward end position of crankcase 65, trailing wheel is bearing on the power unit 18 in the mode that can swing freely with brake pedal 67 and main support 68.

At this, the 71st, the handlebar cover, the 72nd, front shroud, the 73rd, be configured in the battery in push pipe 11 the place aheads, 73a is used to support battery 73 and the battery support carriage that is installed in push pipe 11 front portions, and the 74th, cover the top of front-wheel 28 and the front fender apron at rear, the 76th, leg protective cover, 77 are arranged on the fuel door of the band closing appliance on the leg protective cover 76, when from being arranged on oil filling port 23e on the fuel tank 23 (with reference to Fig. 3.The 78th, the lid of obstruction oil filling port.) when refueling, can carry out opening and closing operations to oiling, 81, the 81 (symbols 81 of a side in face of only showing by fuel door.) be mounted in the double-type engine lifting bracket in the left and right sides on the main car frame 12,82 are mounted in the drum brake system on the trailing wheel usefulness axletree 83, the 84th, be used to the torsion bar that prevents that drum brake system 82 from rotating, this torsion bar is erected on the drg fin (not shown) and back vent 47 of drum brake system 82, the 86th, the shock absorber unit, it is erected on back vehicle frame 21 sides of a rear shock absorber carriage 47a and a side, this rear shock absorber carriage 47a is arranged on the back vent 47,87 are mounted in the scraper on the rear lower of boot 24, the 88th, the rear mudguard of covering trailing wheel 46 tops, the 91st, handrail, the 92nd, taillight.

Fig. 2 is the main position birds-eye view (arrow among the figure (FRONT) the expression vehicle front of two-wheeled motorcycle of the present invention.Below identical.), freeing pipe 61 is extended downwards and rearward below power unit 18 from the cylinder cap 51 of driving engine 16, near the rearward end of the crankcase 65 of power unit 18, silencer 63 is connected to the rear end of freeing pipe 61, rearward end at crankcase 65 is provided with the left and right sides double-type bracket supports

hub

65S, 65S integratedly, on these bracket supports

hubs

65S, 65S, offer spool support holes 65a, a 65b respectively, make bolster 101 pass these

support holes

65a, 65b, brake pedal 67 and main support 68 are bearing on this bolster 101 in the mode that can swing freely respectively.

Linear state extends along the vehicle fore-and-aft direction freeing pipe 61 to be roughly below power unit 18, Catalyst 62 extends and it is roughly overlapping with the cylinder portion 50 of driving engine 16 in birds-eye view along the vehicle fore-and-aft direction, and is positioned at the left bulge 65c of vehicle crankcase 65 and the place ahead of right bulge 65d.

Silencer 63 is by being configured in the roomy anterior 63a between power unit 18 and the trailing wheel 46 and rearward constituting along the lengthwise rear portion 63b that the right flank of trailing wheel 46 extends from this roomy anterior 63a, and it is " L " word shape.And 69 are arranged on the tail pipe on the 63b rear end, lengthwise rear portion.

Silencer 63 is configured in the below of back vent 47, and the tail pipe 69 of silencer 63 is configured in the inboard of left and right

back seat pedal

36,37 in detail, and this left and right

back seat pedal

36,37 is positioned at the below of the arm 104 on back vent 47 right sides.Therefore, can make silencer 63 be difficult to expose outside.

Roomy anterior 63a has the left part installation portion 63c on the back side that is installed in pivot plate 13 (with reference to Fig. 1), and lengthwise rear portion 63b has the right part installation portion 63d that is installed on the side pedal bearing support 42.

The front end of torsion bar 84 is installed on the crossbeam 105, and this crossbeam 105 is connected on the left and right sides arm 103,104 of back vent 47.

At this, the 111st, be used for leg protective cover 76 is installed in installation bracket in the cylinder portion 50, the 112nd, the gear shift pedal that change-speed box 17 is possessed, the 113rd, side stand, the 114th, be used to support back vent 47 and be installed in pivot tube on the pivot plate 13 (with reference to Fig. 1), the 116th, the starter pedal that engine starting is used, the 117th,

main pedal

66,66 and be installed in the pedal-rod of crankcase 65 1 sides about being used to connect.

Above-mentioned pivot tube 114, it also supports left and right sides

pedal bearing support

41,42 with back vent 47.

Fig. 3 is the main position lateral plan of two-wheeled motorcycle of the present invention, the flange part 23a of fuel tank 23 by bolt 123 and nut 124 (nut 124 be fixed on fuel tank installation bracket 121,122 below.) be installed on the fuel tank installation bracket 121,122 vehicle frame 21, the 22 (symbol 21 of a side in face of only showing in back about this fuel tank installation bracket 121,122 is installed on respectively.) on.And, the 125th, be configured in the fuel tank 23 and be installed in fuel charger on the upper wall of fuel tank 23.

Above-mentioned fuel tank installation bracket the 121, the 122nd is along curve 21b, 22b (the symbol 21b of a side in face of only showing of

back vehicle frame

21,22.) fore-and-aft direction parts mounted thereto because fuel tank 23 is fixed thereon along the fore-and-aft direction of curve 21b, 22b,, can improve the rigidity separately of

back vehicle frame

21,22 so fuel tank 23 can play the effect of the reinforcement material of back vehicle frame 21,22.In addition, since fuel tank 23 be erected at about on the

vehicle frame

21,22 of back, because therefore the crossbeam of double as vehicle frame 45, also can play the effect that improves whole vehicle frame 45 rigidity.

The rearward end 12a of main car frame 12 so the height H 1 of its height H 2 relative toe lateral is little, therefore, can make the position of the bottom surface 23f of fuel tank 23 descend owing to reduced its size up and down, enlarges the capacity of fuel tank 23.

Boot 24 is

protrusion

24a, 24a (the symbol 24a of a side in face of only showing below the bottom has the double-type front end in the left and right sides.) and double-type rear end, left and right sides below

protrusion

24b, 24b (the symbol 24b of a side in face of only showing.), by bolt 128 and nut 131 lower

front protrusion

24a, 24a are installed in the double-type boot installation bracket 126,126 in the left and right sides (symbol 126 of a side in face of only showing.) on, and the double-type boot installation bracket 126,126 in this left and right sides be installed in fuel tank 23 above, by bolt 128 and nut 131 lower

rear protrusion

24b, 24b are installed on the boot installation bracket 127, this boot installation bracket 127 is installed on respectively on the

vehicle frame

21,22 of back.

Nut 131 is cartridges, possesses flange at the one end, inside face at tube possesses negative thread, and this nut 131 inserts in the inserting hole that is to offer on the boot installation bracket 126,127 from bottom to top, and is fixed by welding on the boot installation bracket 126,127.

The process that boot 24 is installed in boot installation bracket 126,127 is as follows: will and position on the part above the through hole of offering on

protrusion

24a, 24a below the front end of boot 24 and lower rear protrusion 24b, the 24b is entrenched in being projected into from boot installation bracket 126,127 of nut 131, and in boot 24 bolt 128 will be tightened on the negative thread of nut 131.

Silencer 63 is to make container-like parts by combining between the higher and lower levels with freeing pipe 61 bonded assembly bottom silencer halfbodies 135 and last silencer halfbody 136.

Bottom silencer halfbody 135 sees that from the side its bottom surface possesses the below bulge 135a of bulging downwards, and the bulging position of this below bulge 135a overlaps with the main support 68 of last jumping state.

The installation portion that being used on the silencer 63 installs on pivot plate 13, be left part installation portion 63c, constitute by the nut (not shown) that is installed in the installation bracket 137 on the silencer halfbody 136 and be installed on the side of this installation bracket 137, by bolt 138 being passed the support plate 139 on the back side that is installed in pivot plate 13, and then on the nut that its figure that is tightened in above-mentioned installation bracket 137 1 sides is not shown, so just left part installation portion 63c has been installed on the pivot plate 13.

The installation portion that being used on the silencer 63 installs on pedal bearing support 42, be that right part installation portion 63d is made of with the cartridge unit 142 that is installed in the top of this installation bracket 141 installation bracket 141 that is installed on the silencer halfbody 136, by bolt 146 and nut 147 cartridge unit 142 is installed in and is arranged on the carriage 144 on the pedal bearing support 42, and then right part installation portion 63d is installed on the pedal bearing support 42.

Respectively the bottom and the back vent 47 of

pedal bearing support

41,42 are co-axially mounted on the pivot tube 114 that is arranged on the pivot plate 13 by bolt 151, respectively the top of

pedal bearing support

41,42 are installed in carriage 152, the 152 (symbol 152 of a side in face of only showing that is arranged on the

vehicle frame

21,22 of back by bolt 153.) on.

Fig. 4 is the lateral plan at the main position of vehicle frame of the present invention, wherein, back

vehicle frame

21,22 is welded on the rear portion, the left and right sides of main car frame 12, pivot plate 13 is welded on the rearward end bottom of main car frame 12, pivot tube 114 is chimeric and be welded on the scarce 13b on the back side 13a that is arranged at this pivot plate 13, will assist vehicle frame 34, the 34 (symbol 34 of a side in face of only showing.) an end be welded on the outer peripheral face 114a of the back side 13a of pivot plate 13 and pivot tube 114.139 are mounted in the support plate of the 13a bottom, the back side of pivot plate 13.

The pars intermedia welded and installed of

auxiliary vehicle frame

34,34 is at the two sides of main car frame 12 12c, 12c (the symbol 12c of a side in face of only showing.) on.And, the 161st, the reinforcing pipe about being erected at for reinforcing on the

auxiliary vehicle frame

34,34.

Fig. 5 (a) and (b) are scheme drawings of hinge portion of the present invention.

(a) be the block diagram at the main position of vehicle frame, pivot plate 13 is (only to show the symbol 13d of a side by the 13D of pair of plates portion, 13E about being arranged on.) and connect these flat parts 13D, the 13E integrally formed product of the connecting panel 13F formation of rear end separately respectively, the uncovered cross sectional shape in its place ahead roughly is " U " font.

Pivot tube 114 is installed on the scarce 13b (with reference to Fig. 4) of connecting panel 13F one side, and support plate 139 is installed on the back side 13a of connecting panel 13F.

Support plate 139 is plates of " L " font, offers bolt-inserting hole 139a on it and nut 163 is installed.

(b) be the block diagram of pivot plate 13, the scarce 13b of pivot plate 13 is made of rear portion notch part 13j, the 13k that the 13h of window portion that is arranged on connecting panel 13F pars intermedia reaches the circular shape that forms at the rear portion of left and right sides flat part 13D, 13E.In addition, 13m, 13n are the bottom and upper segments of the 13h of window portion.

When being entrenched in pivot tube 114 (with reference to (a)) among the scarce 13b, rear portion breach 13j from a side inserts with an end of pivot tube 114, its top 13m and following 13n along the 13h of window portion is moved, outstanding from the scarce 13k in the rear portion of opposite side then, perhaps the outer peripheral face with the pars intermedia of pivot tube 114 inserts to the 13h of window portion, moves it the inside of rear portion notch part 13j, 13k.Then pivot tube 114 is solder-connected on the pivot plate 13.

Because position welding pivot plate 13 and pivot tube 114 at the top 13m of the 13h of window portion and the outer peripheral face 114a of following 13n, rear

portion notch part

13j, 13k and pivot tube 114 (with reference to (a)), so can strengthen weld length, can increase the anchoring strength of pivot plate 13 and pivot tube 114, it is linked together securely.

Turn back to Fig. 4, the pivot plate supporting structure of supporting pivot plate 13 is as follows, pivot plate 13 is installed in the rearward end bottom of main car frame 12, pivot tube 114 is installed on the back side 13a of this pivot plate 13, to assist vehicle frame 34, an end separately of 34 is installed on pivot plate 13 and the pivot tube 114, to assist

vehicle frame

34,34 the other end is installed in back vehicle frame 21, on 22, to assist

vehicle frame

34,34 pars intermedia is installed on the rearward end of main car frame 12, see from the side, main car frame 12, pivot plate 13 and auxiliary vehicle frame 34 triangularities, main car frame 12, back vehicle frame 21,22 (the symbols 21 of a side in face of only showing.) and the leg-of-mutton truss structure of auxiliary vehicle frame 34 formation.

Therefore, can further improve in the past the rigidity of the hinge portion 165 that constitutes by pivot plate 13 and pivot tube 114.

Fig. 6 be along arrow among Fig. 36 to view, the pars intermedia of the

auxiliary vehicle frame

34,34 that will extend from

back vehicle frame

21,22 1 sides is installed on two sides 12c, the 12c of main car frame 12, and, the end of

auxiliary vehicle frame

34,34 is installed on the outer peripheral face 114a of the back side 13a of pivot plate 13 and pivot tube 114.

Like this, owing to be installed in the pivot plate 13 on the main car frame 12 and be installed in pivot tube 114 on the pivot plate 13 and also be installed in

auxiliary vehicle frame

34,34 supportings on the main car frame 12, so, can prop up the pivot plate 13 and the pivot tube 114 that afford from the very big load effect of back vent 47 (with reference to a Fig. 1) side securely.

Fig. 7 is the 7-7 line side cross sectional view along Fig. 4, main car frame 12 rectangular tubuloses, side cover support plate 167,168 is installed on the

engine lifting bracket

81,81,

engine lifting bracket

81,81 is installed on two sides 12c, the 12c of this main car frame 12, on this side cover support plate 167,168, side cover (not shown) is installed.In addition, 167a, 168a are the bolt insertion hole that is used to insert the bolt that driving engine is installed.

Fig. 8 is the lateral plan at the main position in other embodiment of pivot plate of the present invention.For the structure mark prosign identical, and omit its detailed description with embodiment shown in Figure 4.

The pivot plate 171 that is installed in the rear lower of main car frame 12 is a kind of like this parts, is about to the double-type flat part 172,172 in the left and right sides (symbol 172 of a side in face of only showing.) be connected these flat parts 172,172 separately the connecting panel 173 of rear end form one.

Flat part 172 is made of with the connecting portion 177 that is connected these engine lifting bracket portions 175 and pivot board 176 respectively the pivot board 176 that fore engine lifting bracket portion 175 is set, is arranged on the rear portion.

At the rear portion of pivot plate 171 breach 181 is set, pivot tube 114 is chimeric and be welded on this and lack on 181, will assist vehicle frame 34, the 34 (symbol of an example in face of only showing by welding.) the end be installed in respectively on the outer peripheral face 114a of the back side 13a of connecting panel 173 and pivot tube 114.

As above Fig. 1 and shown in Figure 4, two-wheeled motorcycle 10 of the present invention comprises: from the main car frame 12 of push pipe 11 to the extension of the oblique back lower place; The power unit 18 that is connected and reaches the lower support of passing through main car frame 12 with the rear portion of this main car frame 12 to the

back vehicle frame

21,22 that extend oblique back upper place, it the 1st is characterised in that: the rear lower that pivot plate 13 is arranged on main car frame 12, pivot tube 114 is arranged on the back side 13a of this pivot plate 13, swingingly supports back vent 47 freely with this pivot tube 114.

Therefore, can shorten the front and back width of pivot plate 13, can make that pivot plate 13 volumes reduce, weight saving, be convenient to cost-cutting.In addition, back side 13a supporting pivot tube 114 that can be by whole pivot plate 13 can support pivot tube 114 securely, and can improve the rigidity of pivot plate 13 itself.

As shown in Figure 5 and Figure 6, the present invention's the 2nd feature is: pivot plate 13 possesses the relative 13D of pair of plates portion, the 13E and the connecting panel 13F of the rear end that is connected these

flat parts

13D, 13E, and the uncovered shape of cross section in its place ahead is roughly " U " font, on the 13a of the back side of connecting panel 13F, breach 13b is set, pivot tube 114 is entrenched among this scarce 13b.

Therefore, the front and back length of the pivot plate 13 that reduces to be equipped with pivot tube 114 can be made, hinge portion 165 miniaturizations that constitute by pivot plate 13 and pivot tube 114 can be made.

In addition, because to the chimeric pivot tube 114 of breach 13b, so, can strengthen the combination of pivot plate 13 and pivot tube 114, and, the rigidity of pivot plate 13 can be improved.

As Fig. 4 and shown in Figure 6, the present invention's the 3rd feature is: will be configured in the both sides of main car frame 12 and be connected on the main car frame 12 as the pars intermedia of the

auxiliary vehicle frame

34,34 of a pair of link that connects back

vehicle frame

21,22 and pivot plate 13, the front end of these auxiliary vehicle frames 34,34 is connected on the pivot tube 114 on the back side 13a that is arranged at pivot plate 13 at least.

Because except with main car frame 12 supportings, also use and auxiliary vehicle frame 34, the 34 supporting pivot tubes 114 of main car frame 12 bonded assemblys, so, the rigidity of the hinge portion 165 that constitutes by pivot plate 13 and pivot tube 114 can further be improved.

As shown in Figure 3, the present invention's the 4th feature is: the back side 13a of the bottom by pivot plate 13 is via support plate 139 supporting silencers 63.

Because the back side 13a of the bottom by pivot plate 13 supporting silencer 63, so, the back side 13a of pivot plate 13 bottoms and silencer 63, approaching with last silencer halfbody 136 in detail, can make support plate 139 miniaturizations of supporting silencer 63, be convenient to expendable weight.

As shown in Figures 2 and 3, the present invention's the 5th feature is: by pivot tube 114 and the

pedal bearing support

41,42 of

vehicle frame

21,22 supportings in back as the back seat pedal bracket, and

pedal bearing support

41,42 is used to support the

back seat pedal

36,37 that co-driver is placed pin.

Because by pivot tube 114 and back

vehicle frame

21,22 supporting pedal bearing supports 41,42, so supporting pedal

back seat pedal

36,37 more reliably.

And, as shown in Figure 4, in the present embodiment, though will assist the end of

vehicle frame

34,34 to be connected on the outer peripheral face 114a of the back side 13a of pivot plate 13 and pivot tube 114, but be not limited to this, also the end of assisting

vehicle frame

34,34 only can be connected on the outer peripheral face 114a of pivot tube 114.

Body frame structure for automotive of the present invention is particularly suitable for two-wheeled motorcycle.

Claims

1. the body frame structure for automotive of a two-wheeled motorcycle comprises:

From the main car frame that push pipe extends to the oblique back lower place, the back vehicle frame that is connected and extends to oblique back upper place with the rear portion of this main car frame reaches the power unit by the lower support of above-mentioned main car frame,

It is characterized in that:

Pivot plate is arranged on the rear lower of above-mentioned main car frame, pivot tube is arranged on the back side of this pivot plate, support back vent in the mode that freely swings by this pivot tube.

2. the body frame structure for automotive of two-wheeled motorcycle as claimed in claim 1, it is characterized in that: above-mentioned pivot plate has relative pair of plates portion, and the connecting panel of the rear end of these flat parts of connection, and the uncovered shape of cross section in pivot plate the place ahead roughly is " U " font, on the back side of above-mentioned connecting panel, breach is set, above-mentioned pivot tube is entrenched in this breach.

3. as the body frame structure for automotive of the two-wheeled motorcycle of claim 1 or claim 2, it is characterized in that: the pars intermedia that will be configured in the both sides of above-mentioned main car frame and connect a pair of link of above-mentioned back vehicle frame and above-mentioned pivot plate is connected on the above-mentioned main car frame, and the front end of these links is connected on the above-mentioned pivot tube on the back side that is arranged at above-mentioned pivot plate at least.

4. as the body frame structure for automotive of the two-wheeled motorcycle of claim 1, claim 2 or claim 3, it is characterized in that: with the bottom rear support silencer of above-mentioned pivot plate.

5. as the body frame structure for automotive of any 1 two-wheeled motorcycle of claim 1～claim 4, it is characterized in that: with above-mentioned pivot tube and above-mentioned back vehicle frame supporting back seat pedal bracket, this back seat pedal bracket is used to support the back seat pedal that co-driver is placed pin.