CN1194929A - Body cover supporting structure of two-wheeled motor vehicle - Google Patents

Abstract

The present invention provides a body cover supporting structure of a two-wheeled motor vehicle. The two-wheeled motor vehicle is provided with a frame integrally formed of light alloy or synthetic resin, and the body cover is properly supported on the frame. The frame of the scooter-type two-wheeled motor vehicle integrally formed from light alloy is equipped with the upper and lower convex ribs ₂₇₂ and ₂₇₃ on the left and right sides of the main frame 27 corresponding to the bottom plate. The guide groove ₂₇₄ ; the left and right floor panels _14L , _14R constituting a part of the body cover are fixed to the bottom bracket ₃₆ in a state where their inner edges are fitted into the guide groove 274. A part of the main frame 27 is exposed upward from the bottom plates _14L , _14R , and is constituted as a part of an exterior part.

Description

Body cover supporting structure of two-wheeled motor vehicle

The present invention relates to a body cover support structure of a two-wheeled motor vehicle having a body frame integrally formed of light alloy or synthetic resin.

Generally, the frame of a motorcycle is assembled by welding steel pipes, and a synthetic resin body cover is attached to cover the frame (see, for example, Japanese Patent Application Publication No. 5-39836).

However, in recent years, there have been motorcycles equipped with frames integrally formed of light alloys such as aluminum. Compared with frames made of welded steel pipes, if the body cover is completely covered to conceal the shape, the degree of freedom in design is high. When there are many light alloy vehicle frames, the bending characteristics of the light alloy vehicle frame can be fully utilized without breaking. Therefore, it is conceivable to expose a part of the light alloy frame from the vehicle body cover and utilize it as a part of the exterior parts. But in this case, if the connection between the vehicle frame and the body cover is not properly handled, a gap will be generated between the two parts, which not only affects the appearance, but also may cause unstable support of the end edge of the body cover.

The present invention has been made in view of the above problems, and an object of the present invention is to properly support a body cover on the frame of a motorcycle having a frame integrally formed of light alloy or synthetic resin.

In the invention described in claim 1, when the vehicle body cover is supported on the vehicle frame integrally formed by light alloy or synthetic resin, since the end edge of the vehicle body cover is engaged with the guide groove formed on the side part of the vehicle frame, the The body cover is correctly positioned and positively supported on the frame. In addition, even if there is some dimensional error between the body cover and the frame, the dimensional error can be absorbed by the portion where the end edge of the body cover fits into the guide groove, thereby preventing the occurrence of gaps and improving the appearance. In addition, since a part of the body frame exposed above from the body cover is used as an exterior part, the degree of freedom of design increases, the appearance is further enhanced, and the number of parts can be reduced.

The invention described in claim 2 can reliably and beautifully support the chassis that bears the rider's weight and stands out from the outside.

The invention described in claim 3 can reliably and beautifully support the leg shield which is conspicuous from the outside and withstands the load caused by the running wind.

In the invention described in claim 4, when the end edge of the body cover is engaged with the guide groove of the vehicle frame, since the lower surface of the body cover is supported on the engagement protrusion below the guide groove, the force attached to the body cover can be supported more reliably. load.

In the invention described in claim 5, since the vehicle body cover is supported by a plurality of engaging protrusions, the support is made more reliable.

In the invention described in claim 6, since the melt is injected from the center plane of the frame during molding with the molding die, the melt flows evenly to the left and right sides of the frame, thereby improving the quality. Furthermore, since the gate portion is automatically cut off when the rib extending along the center plane of the formed frame is finished, the trace of the gate portion is not conspicuous, which improves the appearance.

FIG. 1 is an overall side view of a scooter-type two-wheeled motor vehicle.

Fig. 2 is a view in the direction of arrow 2 in Fig. 1 .

Fig. 3 is a perspective view of the vehicle frame.

Fig. 4 is a view in the direction of arrow 4 in Fig. 3 .

FIG. 5 is an enlarged view of an essential part of FIG. 1 .

FIG. 6 is a view in the direction of arrow 6 in FIG. 5 .

Fig. 7 is a sectional view taken along line 7-7 of Fig. 6 .

Fig. 8 is a sectional view taken along line 8-8 of Fig. 6 .

Fig. 9 is a sectional view taken along line 9-9 of Fig. 6 .

Fig. 10 is a sectional view taken along line 10-10 of Fig. 3 .

FIG. 11 is an explanatory diagram of a modification corresponding to FIG. 10 .

Fig. 12 is a sectional view of a molding die for casting a vehicle frame.

Next, embodiments of the present invention will be described based on the embodiments of the present invention shown in the drawings.

1 to 12 show an embodiment of the present invention. FIG. 1 is an overall side view of a scooter-type two-wheeled motor vehicle. Fig. 2 is a view in the direction of arrow 2 in Fig. 1 . Fig. 3 is a perspective view of the vehicle frame. Fig. 4 is a view in the direction of arrow 4 in Fig. 3 . FIG. 5 is an enlarged view of an essential part of FIG. 1 . FIG. 6 is a view in the direction of arrow 6 in FIG. 5 . Fig. 7 is a sectional view taken along line 7-7 of Fig. 6 . Fig. 8 is a sectional view taken along line 8-8 of Fig. 6 . Fig. 9 is a sectional view taken along line 9-9 of Fig. 6 . Fig. 10 is a sectional view taken along line 10-10 of Fig. 3 . FIG. 11 is an explanatory diagram of a modification corresponding to FIG. 10 . Fig. 12 is a sectional view of a molding die for casting a vehicle frame.

As shown in FIGS. 1 and 2, a scooter-type motorcycle V has a body frame F integrally formed of aluminum alloy. A head pipe 1 is integrally provided on the front portion of the frame F, and a front fork 2 is supported by the head pipe 1 so as to be rotatable right and left. The lower end of the front fork 2 is used to support the front wheel W _f with a shaft, and the upper end is provided with a bar-shaped handle 4 covered by a handlebar cover 3 . A power unit P equipped with an engine 5, a transmission mechanism 6, and a rear wheel _Wr driven by them is supported on the rear lower part of the vehicle frame F through a power unit suspension rod 7 so as to swing up and down. The rear end of the power unit P is connected to the rear end of the vehicle frame F through a rear buffer 8 . The two ends of the slightly U-shaped control subframe 9 are fixed on the rear end of the vehicle frame F when viewed from a plane, and the fuel tank 20 is supported on the subframe 9 .

The body cover B of the two-wheeled motor vehicle V is composed of a leg guard front upper plate 11 covering the top front of the head pipe 1, a leg guard lower plate 12 connected to the bottom of the leg guard front upper plate 11, and two leg guard covers. Leg guard rear plate 13 behind the front plates 11, 12, left and right bottom plates 14 _L , 14 _R connected to the bottom of the frame F, bottom cover 15 covering the two bottom plates 14 _L , 14 _R , covering the rear of the frame F The left and right rear covers _16L , _16R constitute. As can be seen from FIG. 1, the frame F is exposed at the part surrounded by the leg guard rear panel 13, the left and right bottom panels 14 _L , 14 _R , and the left and right rear covers 16 _L , 16 _R , that is, the part between the rider's left and right feet (the front part). , the frame F at the exposed portion constitutes a part of the exterior parts.

Inside the left and right rear covers _16L , _16R are accommodated a storage box 18 for placing a helmet 17 etc., a fuel tank 19 and a fuel tank 20, and their upper parts are covered by a seat 21 which can be opened and closed freely.

As can be seen from FIGS. 3 and 4 , the integrally formed vehicle frame F is cast from an aluminum alloy, and the front portion of the head pipe 1 is equipped with a battery box 26 for supporting the battery. At the rear portion of the head pipe 1, the main vehicle frame 27 with a U-shaped (seeing FIG. 7 ) open section below is connected, and then the slightly flat rear vehicle frame 28 is connected at the rear portion of the main frame 27 . From the lower end of the head pipe 1 to the lower edge of the front part of the main frame 27, four protrusions 27 ₁ ... are formed on the left and right. On the protrusions 27 ₁ ..., a pair of left and right iron plates are fixed with bolts 30 ... The vehicle frame rigidity adjusting part 29,29 that constitutes.

As can be seen from FIG. 10 , clamps 29 ₁ are integrally formed on each vehicle frame rigidity adjusting member 29 , and hose cords, electrical wiring, brake hoses, etc., and hose components 33 are clamped in the clamps. In this way, it is not necessary to provide a special jig, and the number of parts can be reduced. In addition, as in the modified example shown in FIG. 11, the left and right frame rigidity adjusting members 29, 29 may be connected to form a U-shaped cross section to be integrated.

Referring to Fig. 7 and Fig. 8, it can be seen that near the left and right lower edges of the main frame 27, the upper protruding lines 27 ₂ , 27 ₂ and the lower protruding lines 27 extending along its entire length protrude in parallel at predetermined intervals. ₃ , 27 ₃ , forming guide grooves 27 4 , _{27 4 between} the two protruding strips 27 ₂ , 27 ₂ , 27 ₃ , 27 ₃ . Also, at the left and right lower parts of the main frame 27, a pair of left and right raised portions 27 ₅ , 27 ₅ (see FIG. 7 ) and engagement protrusions 27 ₆ , 27 ₆ (see FIG. 8 ) protrude. The raised portion 27 ₅ , 27 ₅ support the front portion of the bottom bracket 36 described later, and the engagement protrusions 27 ₆ , 27 ₆ support the engaged portions 14 ₁ , 14 ₁ protruding from the lower surfaces of the left and right bottom plates 14 _L , 14 _R. Further, on the main frame 27, a pair of left and right engaging protrusions 27 ₇ , 27 ₇ (see FIGS. 3 and 5 ) for supporting the lower surface of the leg shield rear panel 13 protrude.

It can be seen from FIG. 3 and FIG. 9 that a right suspension bracket 28 ₁ protrudes integrally at the lower right position of the rear frame 28 . The inside of the right suspension bracket 28 ₁ is hollow, and a drainage hole 28 ₆ is formed at the lower part of the back. In addition, at the lower left position of the rear vehicle frame 28, the iron plate left suspension bracket 31 cooperating with the above-mentioned right suspension bracket 28 ₁ is fixed by two bolts 32,32. Furthermore, two bolt holes 28 _{4 .} . . for fixing the above-mentioned sub-frame 9 are formed on the left and right side surfaces of the rear frame 28, respectively.

As shown in FIG. 4 , the rear frame 28 is provided with a receiving recessed portion 28 ₁₃ with an open upper portion, and the receiving recessed portion 28 ₁₃ has a front side wall 28 ₉ , a rear side wall 28 ₁₀ , and left and right side walls 28 ₁₁ , 28 standing upward. ₁₂ . The storage box 18 is attached to the rear frame 28 so as to accommodate at least a part thereof in the above-mentioned storage recess 28 ₁₃ .

Two bolt holes 28 ₂ , 28 ₂ and several bolt holes 28 ₃ . . . are formed in the rear frame 28 . The two bolts 32, 32 for fixing the left suspension bracket 31 pass through the two bolt holes 28 ₂ , 28 ₂ , and the bolts (not shown) for fixing the storage box 18 pass through the several bolt holes 28 ₃ . . . In addition, a maintenance opening 28 ₇ for attaching and detaching the exhaust pipe 10 (see FIG. 2 ) or attaching and detaching the ignition plug is formed in the central part of the rear frame 28, and the fuel tank 19 is placed behind it. A hose passage port 28 ₈ for supplying oil from the oil tank 19 to the engine 5 is formed. A rear bumper mounting portion 28 ₁₄ is formed on the left side of the hose passing port 28 ₈ .

Fig. 12 is a longitudinal sectional view showing a molding die D for molding the vehicle frame F having the above-mentioned structure. The molding die D is composed of a _fixed die D ₁ , a movable die _{D 2} and a sliding die D ₃ . And by injecting the melt from several (for example, 4) gates G formed on the dividing surface of the fixed mold D ₁ and the movable mold D ₂ , the melt flows into the chamber C of left-right symmetrical shape equally, and can obtain High-quality frame F with even left and right. In the upper center of the main frame 27 of the vehicle frame F, a rib ₂₇₈ (see FIGS. 3 and 4 ) extending in the front-rear direction is formed. After the vehicle frame F is cast, when the edge of the rib ₂₇₈ is finished, The gate portion connected to it is automatically cut off. In this way, the connecting portion of the above-mentioned gate portion is not conspicuous, and the appearance of the vehicle frame F can be increased.

As shown in FIGS. 5 to 9 , a bottom bracket 36 for supporting the left and right bottom plates 14 _L , 14 _R and reinforcing the main frame 27 is provided on the main frame 27 . The bottom bracket 36 is composed of a pair of left and right side beams _37L , _37R extending in the front-rear direction of the vehicle body, a crossbeam 38 connecting the front ends of the sidebeams _37L , _37R , and a pair of left and right front fixing parts provided on the crossbeam 38. 39 _L , 39 _R , and a pair of left and right rear fixing members 40 _L , 40 _R provided at the rear of the side beams 37 _L , 37 _R. A horn 41 is fixed at the center of the beam 38 . Also, at the front of the bottom bracket 36, the front fixing parts 39 _L , 39 _R thereof are fastened to the bosses 27 ₅ , 27 ₅ of the main frame 27 by bolts 42, 42 (see FIG. 7 ). Supported on the vehicle frame F, also, the rear portion of the bottom bracket 36 is fastened to the above-mentioned left and right suspension brackets ₃₁ , ₂₈ by pivot bolts 43 (see FIG. ₁ and supported on the frame F.

It can be seen from Fig. 6 to Fig. 8 that the left and right bottom plates 14 _L , 14 _R , when their inner edges are fitted in the guide grooves 27 ₄ , 27 ₄ of the main frame 27, are fixed by a pair of left and right bolts 44, 44 It is fastened to the front part of the side beams _37L , _37R of the bottom bracket 36, and further fastened to the rear part of the side beams _37L , _37R by a pair of left and right bolts 45, 45. At this time, the lower surfaces of the engaged portions 14 ₁ , 14 ₁ protruding from the lower surfaces of the floor plates 14 _L , 14 _R are supported on the upper surfaces of the engaging protrusions 27 ₆ , 27 ₆ of the main frame 27 (see FIG. 8 ).

In this way, since the inner edges of the bottom plates 14 _L and 14 _R are supported in _{the guide grooves 27 4 , 27 4 formed between the upper protruding lines 27 2 , 27 2 and the lower protruding lines 27 3 , 27 3 of the main frame 27} , In addition, the joined portions 14 ₁ , 14 ₁ are supported on the joint protrusions 27 ₆ , 27 ₆ of the main frame 27, so that loads such as rider's weight acting on the bottom plates 14 _L , 14 _R can be reliably transmitted to the main frame 27. , the load borne by the bottom bracket 36 can be distributed to the main frame 27 . Moreover, even if there is some dimensional error between the main frame 27 and the bottom plates 14 _L , 14 _R , the fitting portions of the inner edges of the bottom plates 14 _L , 14 _R and the guide grooves 27 ₄ , 27 ₄ can be fixed due to the dimensional error. Absorption, so it can prevent gaps in this part and increase the appearance.

Equally, the inner edge of the leg shield rear plate 13 is also engaged with the guide grooves 27 ₄ , 27 ₄ of the main frame 27, and then the following of its inner edge is engaged with the engaging protrusions 27 ₇ , 27 ₇ of the main frame 27 (see figure 3) The connected state is fixed. In this way, the leg shield rear panel 13 is reliably supported on the main frame 27 so as to withstand the wind pressure of the driving wind, and it is beautifully supported without a gap at the connecting portion of the two members.

It can be seen from Fig. 5, Fig. 6 and Fig. 9 that the power unit suspension rod 7 supports the front end of the power unit P on the vehicle frame F freely up and down, and the suspension rod 7 is fixed on the outer tube 46 by sintering. The ring-shaped elastic parts 47, 47 on the inner circumference of the two ends of the outer tube 46, a pair of left and right inner tubes 48, 48 fixed on the inner circumference of the two elastic parts 47, 47 by sintering, and a fixed part disposed between the two inner tubes 48, 48. Distance ring 49, a pair of struts 50,50 extending backward and downward from outer tube 46, the rear tube 51 connecting the rear ends of the two struts 50,50, the retaining arm 52 extending forward and upward from outer tube 46, and the retaining arm 52 located at the retaining arm. The elastic member 53 at the front end of the arm 52 constitutes.

The above-mentioned pivot bolt 43 passes through the left rear fixing part _40L of the bottom bracket 36, the left suspension bracket 31 made of iron plate fixed on the rear frame 28, the left inner tube 48, the distance ring 49, the right The side inner tube 48, the washer 54, the right suspension bracket ₂₈₁ formed on the rear frame 28, and the right rear fixing member _40R of the bottom bracket 36 are screwed to the nut 55. In addition, the rear pipe 51 is connected to the front end of the power unit P by bolts not shown in the figure. In this way, in the state where the power unit suspension rod 7 is supported under the rear frame 28, the stop arm 52 and the elastic member 53 provided at its front end are accommodated in the recess 285 (see FIG. ₅ ) formed in the rear frame 28, The rotation end of the suspension rod 7 of the power unit is restricted by the contact of the elastic member 53 with the upper wall surface of the concave portion ₂₈₅ .

When the power unit P swings up and down, the elastic members 47, 47 connecting the outer tube 46 and the inner tubes 48, 48 are twisted and deformed; Compression deformation and shock absorption. When the pivot bolt 43 is fastened, since the left suspension bracket 31 made of iron plate is elastically deformed in the left and right directions, the axial force of the pivot bolt 43 can be stabilized, and a large load can be prevented from being applied to the relatively rigid aluminum. Alloy right suspension bracket ₂₈₁ .

However, if the load input from the power unit P through the power unit suspension rod 7 is only supported by the left and right suspension brackets 31, ₂₈₁ , there is a problem that the strength of these suspension brackets 31, ₂₈₁ must be increased, resulting in an increase in weight. . However, in this embodiment, since the left and right suspension brackets 31, ₂₈₁ are connected to the central part of the main frame 27 through the bottom bracket 36, the load input to the suspension brackets 31, ₂₈₁ can be dispersed, and These suspension brackets 31, ₂₈₁ are miniaturized and reduced in weight.

In addition, although the left and right side beams 37 _L , 37 _R of the bottom bracket 36 are connected by the cross beam 37 at the front end, the left and right rear fixing members 40 _L , 40 _R provided on the rear end side are not connected to each other, so the two rear parts The fixed parts 40 _L , 40 _R are indirectly connected by pivot bolts 43 . Generally, as is well known, although moderately reducing the rigidity of the vehicle frame can improve the handling stability of the motor vehicle, if the rear ends of the left and right side beams _37L , _37R of the bottom bracket 36 are connected with a special crossbeam, there is a reason for this. Pivot bolts 43 cause increased rigidity with the possibility of making the frame too rigid.

However, in this embodiment, since the beam connecting the rear ends of the left and right side beams 37 _L and 37 _R is omitted, the pivot bolt 43 assumes this function, so that the rigidity of the vehicle frame is moderately reduced, which not only improves the steering stability, but also The weight can be reduced due to the reduction of the number of parts, and the cost can be reduced.

As mentioned above, although the Example of this invention was described in detail, various design changes can be made in the range which does not deviate from the spirit of this invention.

For example, in the embodiment, the frame F is made of aluminum alloy, but it may be made of other light alloy or synthetic resin. In addition, the body cover supported by the guide grooves 27 ₄ , 27 ₄ is not limited to the leg cover rear panel 13 and the floor panels 14 _L , 14 _R , and may be any other body cover.

According to the invention described in claim 1, since the guide groove is formed on the side part of the vehicle frame integrally formed by light alloy or synthetic resin, the end edge of the body cover is fitted and supported in the guide groove, and a part of the vehicle frame is separated from the vehicle body. Since the cover is exposed above, the vehicle body cover can be correctly positioned and supported on the vehicle frame, and even if there is a slight dimensional error between the vehicle body cover and the vehicle frame, it is possible to prevent a gap between the two parts and enhance the appearance. In addition, since a part of the vehicle frame is exposed above as an exterior component, not only the degree of freedom in design is increased, but also the appearance is improved, and the number of parts can be reduced.

According to the invention described in claim 2 , since the body cover is the floor, the floor that bears the weight of the rider and is conspicuous from the outside can be supported reliably and beautifully.

According to the invention described in claim 3 , since the body cover is a leg cover, the leg cover that is conspicuous from the outside can be supported reliably and aesthetically.

According to the invention described in claim 4, since the vehicle frame is provided with engaging protrusions below the guide grooves, and the lower surface of the body cover is supported by the engaging protrusions, the load acting on the body cover is received by the engaging protrusions and can be supported more reliably. body cover.

According to the invention described in claim 5 , since the engaging protrusions are formed at several places of the vehicle frame, the vehicle body cover can be supported more reliably.

According to the invention described in claim 6, since the vehicle frame is provided with ribs extending along the center plane thereof, when forming the vehicle frame with a molding die, the melt is injected from the edge portion of the ribs, so that the melting during forming the vehicle frame Good fluid flow improves quality. Moreover, when the above-mentioned ribs of the formed product are processed, the gate portion is automatically cut off, so that the trace of the gate portion is not obvious, and the appearance can be improved.

Claims (6)

1. A body cover support structure for a two-wheeled motor vehicle, characterized in that guide grooves (27 ₄ ) are formed on the side of a vehicle frame (F) integrally formed by light alloy or synthetic resin, so that the body cover (13, 14 _L , 14 _R ) are fitted and supported in the guide groove (27 ₄ ), whereby a part of the frame (F) is exposed upward from the body cover (13, 14 _L , 14 _R ). 2. The body cover support structure of a motorcycle according to claim 1, wherein the body cover (14 _L , 14 _R ) is a floor plate. 3. The body cover support structure of a motorcycle according to claim 1, wherein the body cover (13) is a leg cover. 4. The vehicle body cover support structure for a two-wheeled motor vehicle according to claim 1, wherein said vehicle frame (F) is provided with engagement protrusions (27 ₆ , 27 ₇ ) below the guide groove (27 ₄ ), The lower surface of the vehicle body cover (13, 14 _L , 14 _R ) is supported by the engagement protrusions (27 ₆ , 27 ₇ ). 5. The vehicle body cover support structure of a motorcycle according to claim 4, wherein the engaging protrusions (27 ₆ , 27 ₇ ) are formed at several places of the vehicle frame (F). 6. The body cover support structure of a two-wheeled motor vehicle as claimed in claim 1, wherein the vehicle frame (F) is provided with ribs (27 8 ) extending along its central plane, and the forming die (D) is used to form the ribs (27 ₈ ). For the frame (F), melt is injected from the edge portion of the rib (27 ₈ ).

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