MX2012002871A - Motorcycle. - Google Patents

Abstract

In a motorcycle body frame composed by the use of compressed components, a technology by which to position and support a seat without increasing the number of components is disclosed. Means for Solving the Problem: A body frame of a motorcycle 11 includes a pair of left and right 44L seat rails 44R. The pair of left and right seat rails 44L and 44R includes left and right main bars 61L and 61R, and left and right side bars 60L and 60R. At the the end portions of the upper and lower main bars 61L and 61R are provided upper and lower flange sections 72La, 72Ra, 72Rb and 72Lb which are useful as joints. There are also provided first 101L and 101R rubbers at the lateral portion of the seat 22 that is supported by the seat support sections 111L and 111R located innerly in the directon of the vehicle width of the upper flange sections 72La and 72Ra. Drawing selected.

Description

Motorcycle Technical Field The present invention deals with a technology for an improvement in a motorcycle.

Background of the technique A motorcycle body frame is known to have a structure in which bars are attached with metal cladding compressed by welding (for example, refer to Patent Document 1 (FIGS.4 and 5)).

As shown in FIG. 5 of Patent Document 1, a body frame (21) (a number in parentheses hereinafter refers to a reference symbol indicated in Patent Document 1) includes as a component thereof a main frame (30) in the that an upper bar (31) and a lower bar (32), each formed by compressing a coated material and being molded transversely and with a slight U-shape, adjoin each other from the upper and lower parts and are joined together Yes to form a bar with a slightly rectangular shape in transverse form. The main frame (30) is a bar that extends to a rear portion of the vehicle and that also functions as seat rails to support a seat on which the driver will sit.

As shown in FIG. 4 of the patent document, the seat supported by an upper surface of the upper bar (31) has seat support derailleurs (81, 81) connected thereto on the left and right sides in the direction of the width of the vehicle to be able to support the seat in a predetermined position. In other words, according to the technology disclosed in Patent Document 1, the components for positioning and supporting the seat were acquired again.

In recent years, the reduction of manufacturing costs has been requested, a motorcycle body frame has been desired where the seat is positioned and supported without increasing the number of components.

Documents of previous techniques Patent Document Patent Document 1 Japanese Patent No. 4153104 Summary of the Invention Problem to be Solved by Invention It is an object of the present invention to provide, in a body frame composed by the use of compressed components, a technology by which a seat can be positioned and supported without increasing the number of components.

Means to Solve the Problem According to the invention in claim 1, a motorcycle that includes a main tube, a main frame extending rearwardly from the main tube and then downward, and a pair of left and right seat rails that extend backward from the main frame and which has support sections for seat that support the seat, is characterized because: the pair of rails for left and right seat, which are metal compressed in a similar way to a plate, includes the main left and right bars that they have open sections that open in the direction of the width of the vehicle towards the inner side and in that they have a cavity shape transversely, and left and right secondary bars joined in such a way as to cover the open sections; in the height direction of the upper and lower end portions of the main bars, the upper and lower flange sections are provided with which the secondary bars adjoin and weld; the seat is provided with a base plate for a seat, and the base plate for seat is provided with rubbers that come in contact with the pair of left and right seat rails; and when a load is exerted on the seat, the rubbers come into contact with the seat support sections, tend to contact the height direction and extend horizontally, and come in contact with the upper flange sections.

According to the invention in claim 2, the motorcycle is characterized in that the seat support sections are provided on the inner side in the vehicle width direction of the upper flange sections.

According to the invention in claim 3, the motorcycle is characterized in that: the upper surfaces of the left and right seat rails are split in the upper flange sections on the inner and outer sides in the width direction of the vehicle to be in the internal upper surfaces and external upper surfaces, respectively; and the length in the vehicle width direction of the internal top surfaces is greater than the directional length of the vehicle width of the external top surfaces.

According to claim 4, the motorcycle is characterized in that the height of the rubbers is greater at the height of the upper flange sections.

According to the invention in claim 5, the motorcycle is characterized in that: the seat is provided with left and right sections for mounting the seat that extend downwards from the left and right positions in the direction of the vehicle width of the lower plate of seat, and the left and right sections to mount the seat are formed with grooves; the left and right sections for mounting the seat are fastened to the outer surfaces in the vehicle width direction of the left and right main bars through fasteners passing through the slots; and the sections for mounting the seat are overlapped at least in part with the rubbers in the side view of the vehicle.

According to the invention in claim 6, the motorcycle is characterized in that: the seat was provided with left and right guide sections extending down from the left and right positions in the vehicle width direction of the base plate of the seat; the right and left guide sections are placed on the inside in the direction of the vehicle of the rubbers; and the left and right guide sections overlap at least partially on the rubbers in the side view of the vehicle.

Effects of the invention According to the invention in claim 1, the seat support sections which contact the seat side rubbers and which are provided on the seat rails are provided on the interior side in the vehicle width direction of the sections. of the upper flange.

When a load is exerted on the seat, the first rubbers provided on the seat side come into contact with the seat support sections and tend to come into contact in the height direction and to expand horizontally. In this case, as the upper flange sections are placed on the outer sides in the vehicle width direction of the seat support sections, the first side seat rubbers are restrained by the upper flange sections so that they do not protrude towards external sides in the direction of the width of the vehicle.

Therefore, the seat can be supported from the outer sides in the vehicle width direction by using the upper flange sections provided on the outer sides in the vehicle width direction of the seat support sections. As a result, the need for special components to position and support the seat is avoided, so that the number of components can be reduced.

According to the invention in claim 2, the seat support sections provided on the seat rails and which come into contact with the seat side rubbers on the inner side in the direction of the vehicle width of the flange sections are provided. higher .

When a load is exerted on the seat, the first rubbers provided on the seat side come into contact with the seat support sections and tend to come into contact in the height direction and expand horizontally. In this case, since the upper flange sections are positioned on the outer sides in the vehicle width direction of the seat support sections, the upper flange sections prevent the first rubbers on the seat side from expanding to the outer sides in the direction of the width of the vehicle.

Therefore, the seat can be put into position and supported from the outer sides in the vehicle width direction by using the upper flange sections provided on the outer sides in the vehicle width direction of the seat support sections. Consequently, the need for special components to position and support the seat can be avoided, whereby the number of components is reduced.

According to the invention in claim 3, the length in the vehicle width direction of the upper interior surfaces constituting the upper surfaces of the left and right seat rails is set to be greater than the length in the width direction of the vehicle. vehicle of the upper outer surfaces. As the first rubbers on the seat side come into contact with the inner top surfaces on the larger side, the first rubbers on the seat side can support over a wide area. As a result, the seat support can be secured.

According to the invention in claim 4, it is established that the height of the first rubbers is greater at the height of the upper flange sections, so that the bending allows the first rubbers to be secured. When a load is exerted on the seat, the first rubbers can be deflected in an elastic manner. As a result, the driver's comfort while driving can be improved.

According to the invention in claim 5, the left and right sections for mounting the seat extend downwardly from the seat, and the left and right sections for mounting the seat are attached to the left and right main bars.

At the time of mounting the seat, the right and left main bars serve as guide bars, and the outer sides of the left and right main bars guide the left and right sections to mount the seat, where ease of installation can be improved of the seat.

In addition, since the left and right sections for mounting the seat are formed integrally with the seat, the increase in the number of components can be avoided.

According to the invention in claim 6, the left and right guide sections extend downward from the seat, and the left and right guide sections are designed to extend along the left and right side bars.

When assembling the seat, the left and right main bars serve as guide elements, and their left and right guide sections are guided by the inner sides of the left and right secondary bars, so as to improve the ease of installation of the seat .

Brief Description of the Drawings FIG. 1 FIG. 1 is a left side view of a motorcycle according to the present invention.

FIG. 2 FIG. 2 is a left side view of a motorcycle body frame.

FIG. 3 FIG. 3 is a view along the arrow 3 of FIG. 2.

FIG. 4 FIG. 4 is a sectional view taken along line 4-4 of FIG. 2.

FIG. 5 FIG. 5 is a view along the arrow 5 of FIG. 1.

FIG. 6 FIG. 6 shows a side view and a view below a seat.

FIG. 7 FIG. 7 is a sectional view taken along line 7-7 of FIG. 5.

FIG. 8 FIG. 8 is a sectional view taken along line 8-8 of FIG. 5.

FIG. 9 FIG. 9 is a sectional view taken along line 9-9 of FIG. 5.

FIG. 10 FIG. 10 is a sectional view taken along line 10-10 of FIG. 5.

FIG. eleven FIG. 11 is a sectional view taken along line 11-11 of FIG. 5.

FIG. 12 FIG. 12 is an enlarged view of FIG. eleven.

FIG. 13 FIG. 13 is a view of another embodiment of FIG. 12 FIG. 14 FIG. 14 is a sectional view taken along line 14-14 of FIG. 5.

FIG. fifteen FIG. 15 is a sectional view taken along line 15-15 of FIG. 5.

Way of carrying out the Invention Next, the embodiment of the present invention will be described in detail. In the drawings and in the embodiment below, the terms "up", "down", "forward", "back", "left" and "right" indicate the respective directions as seen by a driver driving a motorcycle.

Incidentally, the drawings are observed according to the orientation of the reference symbols.

Realization As shown in FIG. 1, a motorcycle 10 includes: a main frame 11; a front fork 13 which is provided with steering on a main pipe 12 belonging to the main frame 11; a front wheel 14 is mounted to a lower end of the front fork 13; a handle 15 is inserted into an upper portion of the front fork 13; a fuel tank 16 is mounted to a front upper portion of the body frame 11; and an energy unit 21 having an engine 17 and a transmission 18 is placed on the underside of the fuel tank 16.

A seat 22 is mounted to a rear upper portion of the body frame 11, a rotating arm 23 is mounted to a lower portion of the body frame 11, a rear wheel 24 is mounted to a rear end of the rotating arm 23, and extends a rear cushion unit 25 between a rear portion of the rotating arm 23 and the rear portion of the body frame 11.

In addition, a headlight 27 is placed in front of the main tube 12, and a front fender 28 is provided in the front fork 13 which covers the upper portion of the front wheel 14 and is secured to the front fork 13. A regulating element is provided 31 in a rear upper portion of the engine 17. A tail light 32 is placed towards the rear of the seat 22, and a rear fender 33 is provided which covers the upper portion of the rear wheel 24 under the tail light 32.

Incidentally, the regulating element 31 can be a carburetor.

Now, the shell covers will be described below.

The frame covers 35L and 35R (refer to FIGS 9, 10, 14 and 15, only the reference symbol 35L on the left side shown in FIGS 9 and 10) include intermediate left and right side covers 36L and 36R (refer to FIGS 9 and 10, only to reference symbols 36L on the left side shown) covering the side parts of the vehicle in rearward positions of the engine 17 and forward of the rear wheel 24, and the left and right rear side covers 37L and 37R (refer to FIGS. 14 and 15) which are located between the rear shock absorber unit 25 and the rear light 32 and the vehicle's side cover portions.

Now, the structure of the body frame 11 will be described below.

As shown in FIG. 2, the body frame 11 includes: the main pipe 12, a main frame 41 which extends rearwardly from the main pipe 12 and then extends downwardly; a pivot frame 42 that is firmly secured to a rear end portion of the main frame 41; a lower frame 43 extending obliquely towards a lower rear side of a front portion of the main frame 41 and the main pipe 12; a pair of left and right rails for seat 44L and 44R (only the reference symbol 44L can be seen on the side of the observer in the drawing) which extend rearward from the main frame 41 and which support the seat 22. It ensures a hook 45 for supporting the power unit (reference symbol 21 in FIG 1) to a lower end portion of the lower frame 43.

The main frame 41 includes a front main frame half 47 extending backward from the main pipe 12, and a rear main frame half 48 extending downwardly from the front half of the main frame 47. The front half of the frame main 47 is provided integrally with projected portions 49L and 49R (only reference symbols 49L on the observer side in the drawing shown) protruding from the outer sides in the direction of vehicle width. The pivot frame 42 is attached to the lower end of the rear half of the main frame 48.

The seat rails 44L and 44R integrally include: rail bodies 51L and 51R (only the reference symbol 51L is shown on the observer side in the drawing) which extend rearward and substantially horizontally from a section of outline 53 located between the front half of the main frame 47 and the rear half of the main frame 48; and secondary frames 52L and 52R (only the reference symbol 52L is shown on the observer side in the drawing) extends obliquely forward and downward toward the pivot frame 42 from the vicinity of the support sections of the frame. rear shock absorber 54 having the rail bodies 51L and 5IR, respectively.

In other words, the rail bodies 51L and 51R supporting the seat (reference number 22 in FIG.1) extend from the main frame 41, and the secondary frames 52L and 52R extend between the rail bodies 51L and FIG. 51R and the pivot frame 42. The seat rails 44L and 44R have the rail bodies 51L and 51R and the secondary frames 52L and 52R, respectively, are positioned so that they have a slightly Y-shaped side view of the vehicle. Each of the components of the body frame 11 is a hollow frame made of a bar with a compressed metallic coating.

Now, the structure of the body frame 11 will be described as seen from above.

As shown in FIG. 3, the single main frame 41 extends rearwardly from the main tube 12, and the left and right seat rails 44L and 44R are joined at their front ends to the left and right side surfaces 41L and 41R of the main frame 41. right and left seat rails 44L and 44R, which are widely spaced at their front portions to the exterior sides in the vehicle width direction, extend rearwardly, and a first cross member 55 extends between the left seat rails and right 44L and 44R. To the rear of the first cross member 55, a bar-shaped cross member 57 extends in the direction of the width of the vehicle between the left and right seat rails 44L and 44R. The cross member 57 has both of its ends protruding outwardly through the outer surfaces of the left and right seat rails 44L and 44R, respectively, and includes the rear shock absorber support sections 54, 54 supporting the upper ends of the rear shock absorber unit (reference symbol 25 in FIG 1). To the rear of the cross member 57, a second cross member 56 extends between the rear end portions of the left and right seat rails 44L and 44R.

Back to FIG. 2, the tips of the secondary frames 52L and 52R that are provided as components of the seat rails 44L and 44R are placed on the first flat surfaces 65, 65 (only the reference symbol 65 is shown on the observer side in the drawing) constituting the side walls of the pivot frame 42. The tips of the secondary frames 52L and 52R are each joined to a first flat surface 65 by spot welding. In the drawing, the points marked with x are spot welding points.

Incidentally, the joining means are not restricted to spot welding (resistance welding) but can also be electric arc welding, gas flame welding, brazing or the like.

Next, a section structure of the first front half of the main frame will be described below.

As shown in FIG. 4, the main frame 41 has a structure in which left and right main elements in the form of a cavity which are composed of bars with metal cladding and which have open sections that open towards the inside towards the width of the vehicle adjoin each other from the outer sides in the direction of the width of the vehicle to form an element having a section with a space with a more or less rectangular shape transversely. The left and right main elements 59L and 59R are respectively formed with left and right projection portions 49L and 49R that exit to the outer sides in the direction of the width of the vehicle. By providing the projection portions 49L and 49R to the main frame 41, improvement of the stiffness of the main frame 41 is ensured and generation of vibrations is avoided, as compared to the case where said projection portions are not provided.

Now, the structure of the seat and the periphery thereof will be described below.

As shown in FIG. 5, the motorcycle 10 has the front wheel 14 thereof, the fuel tank 16 is placed rearwardly of the front wheel 14, the seat 22 is placed continuously with respect to the fuel tank 16, and the rear fender 33 which covers the upper portion of the rear wheel (reference symbol 24 in FIG.1) is located so that it overlaps the rear half of the seat 22.

The seat 22 is a so-called double seat in which two passengers can be seated on the front and rear sides, respectively. In the drawing, the reference symbol 200 shows one meter or meters; symbols 201L and 201 show the steps on which the driver places his feet; the symbols 38L and 38R show the rear steps on which the rear passenger places his feet; and symbols 40L and 40R show the handrails to be secured.

Now, the seat will be described next.

FIG. 6 (a) shows the seat as seen from one side of the vehicle, and FIG. 6 (b) shows the seat seen from below.

In FIG. 6 (a), the seat 22 includes: a lower seat plate 91 consisting of a lower surface of the seat; a seat cover 92 extending from the lower plate of the seat 91 to cover a body of the seat; the left and right sections for mounting the seat 93L and 93R (only the reference symbol 93L is shown from the observer side in the drawing) extending downward from the bottom plate of the seat 91 and by which the seat 22 is fastened to the body frame (reference symbol 11 in FIG 2); and the left and right guide sections 94L and 94R (only the reference symbol 94L is shown on the observer side in the drawing) extending downwardly from the lower plate of the seat 91 in rearward positions of the left and right sections. right to mount the seat 93L and 93R and by which the seat 22 is positioned in the direction of the width of the vehicle.

In FIG. 6 (b), a plurality of rubbers 100 through which a force is exerted on the seat 22 and transmitted to the body frame 11 are added to the lower seat plate 91 consisting of the lower surface of the seat 11. The rubbers 100 include: first left and right rubbers 101L and 101R which are provided in a front portion of the lower plate of the seat 91 in the left and right positions in the width direction of the vehicle and which are a little rectangular seen from below; the second left and right rubbers 102L and 102R which are located rearward of the first left and right rubbers 101L and 101R and which are a little rectangular seen from below; and the third left and right rubbers 103L and 103R which are located rearwardly of the second left and right rubbers 102L and 102R and which are slightly circular seen from below. To the rear of the third left and right rubbers 103L and 103R, a fourth rubber 104 was placed with a more or less rectangular shape seen from below in a central position in the direction of the width of the vehicle.

Now, refer to the FIGS. 7 and 8, since the structure of the lower plate of the seat 91 and the periphery thereof will be described below.

As shown in FIG. 7, the lower plate of the seat 91 extending in the direction of the rearward facing of the vehicle and constituting the lower surface of the seat 22 is provided in the vicinity of a rear end portion thereof with the fourth rubber 104 that is extends downwardly from the lower plate of the seat 91 to support a rear portion of the seat 22. The fourth rubber 104 was mounted to an element 105 that was projected downward at a rear portion of the vehicle.

As shown in FIG. 8, the body frame 11 of the motorcycle has the left rail for seat 44L extending rearwardly from the main frame 41. The left rail for seat 44L has a support section for the seat 111L to support the seat 22.

The first left rubber 101L and the second left rubber 102L are mounted to the lower plate of the seat 91. The first left rubber 101L and the second left rubber 102L are supported by the seat support section 111L consisting of a top surface of the rail for seat 44L.

Although the seat support structure on the left side was described above in the vehicle width direction, the seat support structure on the right side in the vehicle width direction is also as described above, except for the difference between the left and the left. and right, so the description of it was omitted.

Now, with reference to FIGS. 9 to 11, the structure of the left and right seat rails 44L, 44R placed under the seat 22 will be described in detail below.

As shown in FIG. 9, the pair of left and right rails for seat 44L and 44R composed by the use of bars with compressed metal cladding includes left and right main bars 51L and 61R having open sections 112L and 112R opening to the inner side in the width direction of the vehicle and having a cavity shape in cross section, and left and right secondary bars 60L and 60R joined with the left and right main bars 61L and 61R towards the outer sides in the width direction of the vehicle so as to cover the open sections 112L and 112R.

The first plate-shaped cross member 55 extends between the pair of left and right rails for seat 44L and 44R, and a section for securing the fuel tank 75 is adjusted to a central portion in the direction of the vehicle width of the first cross member. A rear end 16b of the fuel tank 16 is established in the section for holding the fuel tank 75, and the rear end 16b of the fuel tank 16 is attached to the first cross member 55 through a fastening element 114. The symbol reference 119 shows a box for air filter.

The periphery of the rear end 16b of the fuel tank 16 is covered with a rubber element 106. This prevents the vibrations generated in the fuel tank 16 from being easily transmitted to the body frame 11 or the vibrations which can be prevented from being transmitted. generated in the body frame 11 are easily transmitted to the fuel tank 16.

As shown in FIG. 10, the body frame 11 was provided with a pair of left and right rails for seat 44L and 44R. The left and right seat rails 44L and 44R have the left and right main bars 61L and 61R, and the left and right secondary bars 60L and 60R which adjoin respectively and join the left and right main bars 61L and 61R from the inner side in the direction of the vehicle width of the left and right main bars 61L and 6IR.

The upper and lower portions were provided in the direction of the height 6161Ra, 61Lb and 61Rb of the main elements 61L and 61R with upper and lower flange sections 72La, 72Ra, 72Lb and 72Rb in which the secondary bars 60L and 60R abut and weld. Of these flange sections, the upper flange sections 72La and 72Ra operate such that the upper surfaces of the seat rail 115L and 115R are split on inner and outer sides in the vehicle width direction to be within the upper surfaces 117L and 117R and out of the upper surfaces 118L and 118R respectively. The seat support sections 111L and 111R are provided on the inner sides in the vehicle width direction of the upper flange sections 72La and 72Ra.

The length in the vehicle width direction wl of each of the inner upper surfaces 117L and 117R consisting of the seat support sections 111L and 11IR are set to be greater than the length w2 in the direction of the vehicle width of each one of the upper outer surfaces 118L and 118R (w2 <wl).

The seat 22 is provided with the lower plate of the seat 91. The first left and right rubbers 101L and 101R coming into contact with the seat support sections 111L and 111R extend downwardly from the bottom plate of the seat 91.

The height hl of each of the first left and right rubbers 101L and 101R is greater than the height h2 of each of the upper flange sections 72La and 72Ra (h2 < hl).

The seat was provided with the left and right sections for mounting the plate-shaped seat 93L and 93R which extend downwards in the left and right positions in the vehicle width direction of the lower seat plate 91, and the sections for Fit the left and right seat 93L and 93R were formed with slots 121L and 12IR. The left and right seat mounting sections 93L and 93R are secured to the exterior surfaces in the vehicle width direction 61Lc and 61Rc of the left and right main bars 61L and 61R by screws 120, 120 passing through the 121L slots and 121R, whereby the seat 22 is mounted on the body frame 11.

The sections for mounting the seat 93L and 93R are positioned so that they overlap at least in part with the left and right rubbers 101L and 101R in the side view of the vehicle.

As shown in FIG. 11, the pair of left and right rails for seat 44L and 44R composed by the use of the compressed metal clad bar include: the left and right main bars 61L and 61R which have the open sections 112L and 112R opening to the inner side in the direction of the width of the vehicle and having the shape of a cavity transversely; and the left and right secondary bars 60L and 60R are joined so as to cover the open sections 112L and 112R, respectively.

In the upper and lower end portions in the direction of the 61A, 61Ra, 61Lb, and 61Rb height of the left and right main bars 61L and 61R, the upper and lower flange sections 72La, 72Ra, 72Lb and 72Rb were respectively provided in those that the left and right secondary bars 60L and 60R will abut and weld respectively.

In the left and right seat rails 44L and 44R which were provided as frames, a rod-shaped crosspiece 57 extends in the direction of the width of the vehicle. The cross member 75 is made to penetrate the left and right seat rails 44L and 44R and then welded. The cross member 57 was provided with the rear shock absorber support sections 54, 54 by which the rear shock absorber units 25, 25 are fastened.

The rear shock absorber support sections 54, 54 protrude towards the outer sides in the vehicle width direction of the left and right seat rails 44L and 44R, and the upper end portions of the rear shock absorber units 25 are supported by the portions that protrude.

The joint structure of the cross member 57 will now be described in detail below.

The rails for left and right seat 44L and 44R provided as racks were provided with bent frame sections 123L and 123R that were bent towards the interior side in the vehicle width direction deeper than the thickness of the plate t of the left and right seat rails 44L and 44R. Welding was carried out in pit-shaped spaces 124L and 124R which formed between the bent frame sections 123L and 123R and the crossbar 57. The pit-shaped spaces 124L and 124R were formed between the main bars 61L and 61R and the crosspiece 57.

In the positions in which the rear shock absorber support sections 54, 54 penetrated, the left and right seat rails 44L and 44R were provided with reinforcing bars 125L and 125R to improve rigidity of the left and right rails for seat 44L and 44R.

The reinforcing bars 125L and 125R have bent reinforcing sections 126L and 126R which are interposed between the bent frame sections 123L and 123R and the crosspiece 57.

The portions of the exterior side in the vehicle width direction of the left and right seat rails 44L and 44R are composed of the main bars 61L and 61R, and the interior side portions in the vehicle width direction of the left and right rails for seat 44L and 44R are composed of secondary bars 60L and 60R, respectively.

The left and right secondary bars 60L and 60R respectively have protruding sections 127L and 127R which protrude towards the inner side in the direction of the width of the vehicle at positions in which the crossbar 57 penetrates the secondary bars 60L and 60R on the left sides and right in the direction of the width of the vehicle. The protruding sections 127L and 127R were welded to the crossbar 57.

Now, the welding structure applied to the aforementioned pit spaces 124L and 124R will now be described.

As shown in FIG. 12, on an outer surface 61Rc of the right seat rail 44R, the folded frame section 123R which was bent from the inner side in the vehicle width direction deeper than the plate thickness t of the right rail for seat 44R is provided. . A weld joint was formed by gathering a weld material 129 in the pit-shaped space 124R formed between the bent reinforcing section 126R of the reinforcement bar 125R which improved the stiffness of the bent frame section 123R and the cross member 57 which includes the rear shock absorber support section 54.

In more detail, an end portion 130 of the reinforcement bar 125R which is located on the side near the cross member 57 has a vertical surface 131, a first surface 132 provided at the tip of the vertical surface 131 and which slopes towards the inner side in the direction of the width of the vehicle, and a horizontal surface 134 extending horizontally at the tip of the first inclined surface 132 and coming into contact with an outer peripheral surface 57c of the crosspiece. The welding material 129 was brought together between the first inclined surface 132 and the outer peripheral surface 57c of the cross member.

Because above the rear shock absorber support section 54 on the right side is described in the vehicle width direction, and as the left rear shock absorber support section 54 on the left side in the vehicle width direction also has the same construction that up, except for the difference between the directions to the left and to the right, then, the description of it was omitted.

Now, another embodiment of FIG. 12 As shown in FIG. 13, a reinforcing bar end portion 130B located on the side near the cross member 57 has a vertical surface 131B, a first inclined surface 132B provided at the tip of the vertical surface 131B and inclining toward the inner side in the direction of the width of the vehicle, and a second inclined surface 133B provided at the tip of the first inclined surface 132B and which slopes towards the inner side in the direction of the width of the vehicle, and which slopes more towards the side of the horizontal direction than the first inclined surface 132B. A space d was formed between the outer periphery of the crosspiece 57c and a contour 132 between the first inclined surface 132B and the second inclined surface 133B.

FIG. 13 is different from FIG. 12 because the horizontal surface 134 changed to the second inclined surface 133B, and by providing the space d it is ensured that at the time of the welding operation, the gas flame welding easily escapes through the space d to the central side in the direction of the width of the vehicle. As this structure allows easy escape from gas flame welding, it is possible to easily secure a predetermined joint strength and joint quality.

Incidentally, since the attachment structure of the rear shock absorber support section 54 on the right side was provided in the vehicle width direction, and the attachment structure of the rear shock absorber support section 54 on the left side was provided. in the direction of the width of the vehicle is the same as described above, the description of it was omitted.

It was shown in FIG. 14, the pair of left and right rails for seat 44L and 44R composed of the use of bars with compressed metal cladding consisting of: the left and right main bars 61L and 61R having open sections 112L and 112R opening from the inner side in direction of the width of the vehicle and having a cavity shape in cross section; and the left and right secondary bars 60L and 60R which are joined so as to cover the open sections 112L and 112R.

In the upper and lower end portions in the direction of the 61A, 61Ra, 61Lb and 61Rb height of the left and right main bars 61L and 61R the upper and lower flange sections 72La, 72Ra, 72Lb and 72Rb were provided where they adjoined and the secondary bars 60L and 60R were welded.

The upper left and right surfaces of seat rails 115L and 115R were divided by the upper flange sections 72La and 72Ra on the outer and inner sides in the vehicle width direction to be the upper interior surfaces 117L and 117R and the upper surfaces 118L and 118R, respectively. The length wl in the vehicle width direction of each of the inner upper surfaces 117L and 117R is greater than the length w2 in the vehicle width direction of each of the outer upper surfaces 118L and 118R (w2 <wl).

The seat 22 was provided with the lower plate of the seat 91, and the second seat plate 91 was provided with the second rubbers. left and right 102L and 102R that come in contact with the pair of left and right rails for seat 44L and 44R. The seat support sections 111L and 111R for supporting the second left and right rubbers 102L and 102R provided on the interior side in the vehicle width direction of the upper flange sections 72La and 72Ra. Incidentally, the height hl of each of the second left and right rubbers 102L and 102R is greater than the height h2 of each of the upper flange sections 72La and 72Ra (h2 < hl).

The seat 22 was provided with the left and right guide sections 94L and 94R extending down the left and right portions in the vehicle width direction of the lower plate of the seat 91. The left and right guide sections 94L and 94R are placed on the inner side in the direction of the width of the vehicle of the second rubbers 102L and 102R. The left and right guide sections 94L and 94R overlap at least in part with the second rubbers 102L and 102R in the side view of the vehicle.

Now, third rubbers 103L and 103R provided in the rear portions of the seat 22 will be described below.

As shown in FIG. 15, the second bar-shaped cross member 56 extended between the left and right rails for seat 44L and 44R. An upper surface of the second cross member 56 came into contact by the third left and right rubbers 103L and 103R extending downwardly from the lower plate of the seat 91. In other words, the second crosspiece 56 supports a rear portion of the seat 22.

The operation of the body frame 11 of the motorcycle 10 will be described below.

First, as shown in FIG. 10, the seat support sections 111L and 111R provided in the seat rails 44L and 44R and which come into contact with the side seat rubbers (the first rubbers 101L and 101R) on the inner side in the direction of the width of the seat were provided. vehicle of the upper flange sections 72La and 72Ra.

When a load is exerted on the seat 22, the first rubbers 101L and 101R provided on the seat side come into contact with the seat support sections 111L and 111R, and tend to come into contact in the height direction and to spread out. in a horizontal way In this case, since the upper flange sections 72 La and 72 Ra are positioned on the outer sides in the vehicle width direction of the seat support sections 111L and 111R, the first side rubbers 101L and 101R of the seat which are limited by the upper flange sections 72La and 72Ra are spread towards the outer sides in the direction of the width of the vehicle.

Therefore, the seat 22 can be supported from the outer sides in the vehicle width direction by using the upper flange sections 72A and 72Ra provided on the outer sides in the vehicle width direction of the seat support sections 111L and 111R. As a result, the special need for acquiring special components to position and support the seat 22 is avoided, so that the number of components can be reduced.

Secondly, the length wl in the vehicle width direction of the inner upper surfaces 117L and 117R constituting the upper surfaces of the left and right seat rails 44L and 44R is greater than the length w2 in the direction of the vehicle width of the 118L and 118R outer top surfaces. As the first seat-side rubbers 101L and 101R are respectively placed in contact with the inner top surfaces 117L and 117R provided on the widest side, the first seat-side rubbers 101L and 101R can resist over a wide area. Consequently, the seat 22 is more firmly supported.

In the third, as the height hl of the first left and right rubbers 101L and 101R is greater than the height h2 of the upper flange sections 72La and 72Ra, flexibility allowance can be ensured for the first left and right rubbers 101L and 101R. Therefore, when a force is exerted on the seat 22, the first rubbers 101L and 101R can be deflected in an elastic manner. As a result, the comfort of the driver when driving is improved.

Fourth, the left and right sections for mounting the seat 93L and 93R extend downwardly from the seat 22, and the left and right sections for mounting the seat 93L and 93R are attached to the left and right main bars 61L and 61R .

At the time of mounting the seat 22, the left and right main bars 61L and 61R serve as guiding elements, and the left and right sections for mounting the seat 93L and 93R are guided respectively by the outer surfaces 61Lc and 61Rc of the bars main left and right 61L and 61R, which improves the ease of installation of the seat 22.

In addition, since the left and right sections for mounting the seat 93L and 93R are formed integrally with the seat 22, the seat 22 can be supported without adding special components to position the seat 22, so that the amount of components.

Fifth, as shown in FIG. 14, the left and right guide sections 94L and 94R extend downwardly from the seat 22, and the left and right guide sections 94L and 94R are designed to extend along the left and right secondary bars 60L and 60R.

At the time of mounting the seat 22, the left and right main bars 61L and 61R serve as guiding elements, and the left and right guide sections 94L and 94R are guided by the inner sides of the left and right secondary bars 60L and 60R, with what can be improved the ease of installation of the seat 22.

As a sixth point, as shown in FIG. 11, the left and right seat rails 44L and 44R are provided as frames with the folded frame sections 123L and 123R that are folded from the inner side in the vehicle width direction deeper than the bar thickness t of the rails left and right for seat 44L and 44R. As weld seams are attached as seams in the folded frame sections 123L and 123R, the projection of the weld seams W towards the outer sides in the direction of the width of the vehicle in small quantities can be avoided. Since the projection amounts of the weld beads can be avoided at a small level, it can be ensured that the rear shock absorber support sections 54, 54 are long. As a result, it is possible to suppress the elongation of the width of the vehicle and thus have a small width of the vehicle.

Seventh, the seat rails 44L and 44R which are as frames are provided with 125L and 125R reinforcing bars to improve rigidity, at the positions where the rear shock absorber support sections 54, 54 penetrate. With said reinforcing bars 125L and 125R, it is possible to easily reinforce the seat rails 44L and 44R where the damping loads will be exerted.

As an eighth point, as shown in FIG. 12, the reinforcement bar 125R (125L) has a bent reinforcing section 126R (125L). Welding is carried out between the bent reinforcing section 126R (126L) and the crosspiece 57, where the reinforcing bar 125R (125L) and the crosspiece 57 can be welded together, without leaving a space between them.

As a ninth point, as shown in FIG. 11, the pit-shaped spaces 124L and 124R were formed between the main bars 61L and 61R and the crosspiece 57. Even in the case where the pit-shaped spaces 124L and 124R were provided on the outer sides in the width direction of the vehicle of the seat rails 44L and 44R, it can be ensured that the rear shock absorber support sections 54, 54 are long. As a result, the width of the vehicle can be suppressed to a small value.

As a tenth point, the cross member 57 is welded to the left and right protruding sections 127L and 127R possessed by the left and right secondary bars 60L and 60R. Therefore, the cross member 57 was welded to the protruding sections 127L and 127R where the interior portions of the seat rails 44L and 44R protrude, where the possibility of welding work is improved and the welding can be carried out with ease compared to the case where the protrusion is not adopted.

In addition, since the cross member 57 was welded to the inside and outside of the left and right rails for seat 44L and 44R, it is possible to improve rigidity to mount the cross member 57.

Incidentally, while the present invention was applied to a motorcycle in the above embodiments, the invention can also be applied to three-wheeled vehicles, and can be applied to vehicles in general.

Industrial Application The present invention is suitable for application to a motorcycle.

Description of the Reference Symbols 11 body frame, 12 main tube, 22 seat, 41 main frame, 44L, 44R left and right rails for seat, 60L, 60R secondary rods, 61L, 61R main bars left and right, 72La, 72Ra, 72Lb, 72Rb sections upper and lower flange, 91 lower seat plate, 93L, 93R left and right sections for mounting the seat, 94L, 94R left and right guide sections, 100L, 100R rubber, 111L, 111R seat support section, 112L, 112R section open, 117L, 117R inner top surface, 118L, 118R outer top surface, 121L, 121R groove.

Claims (6)

1. A motorcycle that includes a main tube (12), a main frame (41) that extends backward from the main tube (12) and then down, and a pair of left and right seat rails (44L and 44R) that they extend backwards from the main frame (41) and that they have support support sections (111L and 111R) that support the seat (22), it is characterized in that said pair of rails for left and right seat (44L and 44R), which are metal compressed in a bar-like manner, includes the left and right main bars (61L and 61R) that have open sections (112L and 112R) opening in direction of the width of the vehicle towards the inner side and in that they have the shape of a cavity transversely, and secondary left and right bars (60L and 60R) joined in such a way as to cover the open sections (112L and 112R), in the height of the upper and lower end portions of the main rods (61L and 61R), the upper and lower flange sections (72La, 72Ra, 72Lb and 72Rb) are provided with which the secondary rods adjoin and weld ( 60L and 60R), said seat is provided with a base plate for seat (91), and the base plate for seat is provided with rubbers (100L and 100R) that come in contact with the pair of left and right rails (44L and 44R) for seat , Y when a load is exerted on the seat (22), the rubbers (100L and 100R) come into contact with the seat support sections (111L and 111R), tend to contact the height direction and extend horizontally, and they come into contact with the upper flange sections (72La and 72Ra).

2. The motorcycle according to claim 1, characterized in that the supporting sections (111L and 111R) for seat are provided on the inner side in the direction of the vehicle width of the upper flange sections (72La and 72Ra).

3. The motorcycle according to claim 1 or 2, is characterized in that the upper surfaces of the left and right rails (44L and 44R) for seating are split in the upper flange sections (72La and 72Ra) on the inner and outer sides in the vehicle width direction to be on the internal upper surfaces (117L and 117R) and external upper surfaces (118L and 118R), respectively, and, the length in the vehicle width direction of the internal upper surfaces (117L and 117R) is greater than the directional length of the vehicle width of the external upper surfaces (118L and 118R).

4. The motorcycle according to any of claims 1 to 3, characterized in that the height of the rubbers (100L and 100R) is greater at the height of the upper flange sections (72La and 72Ra).

5. The motorcycle according to any of claims 1 to 4, is characterized in that the seat (22) is provided with left and right guide sections extending downwards (93L and 93R) from the left and right positions in the vehicle width direction of the base plate of the seat (91), the (93L and 93R) were formed with slots (121L and 121R), said left and right sections for mounting the seat (93L and 93R) are fastened to the outer surfaces in the vehicle width direction of said left and right main bars (61L and 61R) through fasteners (120, 120) that pass through said slots (121L and 121R), and said sections for mounting the seat (93L and 93R) overlap at least partially on the rubbers (100L and 100R) in the side view of the vehicle.

6. The motorcycle according to any of claims 1 to 5, is characterized in that, the aforementioned seat (22) was provided with and the left and right guide sections (94L and 94R) extending down from the left and right positions in the vehicle width direction from the left and right positions in the vehicle width direction of said lower seat plate (91), said left and right guide sections (94L and 94R) were placed on the inner side in the direction of the vehicle width of said rubbers (100L and 100R), and said left and right guide sections (94L and 94R) overlap at least in part with the rubbers (100L and 100R) mentioned in the side view of the vehicle.