CN101181919B - automatic two-wheeler - Google Patents

Abstract

A motorcycle having a frame structure capable of downsizing the vehicle without increasing the width of the vehicle. An automatic two-wheel vehicle (10) includes: a main frame (25) having two left and right frames (24L, 24R), and a power unit (15) swingably arranged at the rear end of the main frame (25) 1. The rear buffer unit (31) arranged between the rear portion of the power unit (15) and the main frame (25), in the frame structure of the automatic two-wheeled vehicle (10), when the vehicle is viewed from above, the Any one of the left and right vehicle frames (24L, 24R) is provided with an overlapping portion (81) overlapping with the power unit (15), and an avoidance area is formed on the overlapping portion (81) from the power unit (15) to the upper side of the vehicle. Ministry (82).

Description

automatic two-wheeler

technical field

The present invention relates to an improvement of a motorcycle provided with a power unit swingably provided on a main frame.

Background technique

A motorcycle is known that includes a power unit that integrates an engine and a transmission and is swingably provided on a main frame (for example, refer to Patent Document 1).

Patent Document 1: International Publication No. 2004/071858 (FIG. 4)

In FIG. 4 of Patent Document 1, the frame assembly for a vehicle has a downpipe 21 extending from a head pipe 20 (symbols follow those in this publication. The same applies hereinafter.), and extends from the downpipe 21 to the vehicle body left and right A left pipe 22 and a right pipe 23 having a circular cross-sectional shape are provided, and a horizontal pipe 25 is bridged between the rear ends of the left pipe 22 and the rear end of the right pipe 23 .

A square tube frame 24 having a rectangular cross section extends obliquely upward from the rear end of the left side tube 22 . The square tube frame 24 is a component that doubles as the left seat tube.

In addition, from the rear end of the right pipe 23, a right pipe 23 with a circular cross section protrudes outward and extends obliquely upward, and is connected to the right seat pipe 26 starting from the square pipe frame 24. .

A power unit integrating the engine 11 and the transmission is provided between the square pipe frame 24 and the right pipe 23 to swing freely.

That is, in the technique of Patent Document 1, the right pipe 23 protrudes outward and is extended so as to avoid interference between the power unit and the right pipe 23 .

However, since the right pipe 23 protrudes outward and is extended, the width of the vehicle increases, making it difficult to reduce the size of the vehicle. question.

Contents of the invention

An object of the present invention is to provide a motorcycle having a frame structure capable of downsizing the vehicle without increasing the width of the vehicle.

The invention of technical scheme 1 is an automatic two-wheeled vehicle, comprising: a main frame with two left and right frames, a power unit swingably arranged on the main frame, a rear part and a main body mounted on the power unit. The rear buffer unit between the frames, the motorcycle is characterized in that an overlapping portion overlapping with the power unit when the vehicle is viewed from above is provided on any one of the left and right frames, and the overlapping portion is formed on the overlapping portion. There is an escape portion for avoiding the power unit toward the upper side of the vehicle.

The invention of technical solution 2 is characterized in that the left and right frames include a round tube frame and a square tube frame, a rear buffer unit is connected to the square tube frame, and the escape portion is provided on the round tube frame.

The invention according to claim 3 is characterized in that the power unit includes an outside air intake member for taking in outside air for cooling the power unit, and the outside air intake member is provided so as to overlap the escape portion when the vehicle is viewed from above.

The invention of claim 4 is characterized in that the left and right frames extend toward the rear of the vehicle and obliquely upward, and are arranged so as to overlap near the seat support portion when the vehicle is viewed from the side.

Invention effect

In the invention of claim 1, when the vehicle is viewed from above, an overlapping portion is provided between any one of the vehicle frames and the power unit, and an escape portion is formed on the overlapping portion to escape from the power unit to the upper side of the vehicle.

Since the escape portion is formed on one frame, even if there is an overlapping portion with the power unit, interference between the power unit and the escape portion can be avoided.

In addition, since the escaping portion is provided toward the upper side of the vehicle, the width of the vehicle does not increase. Since the width of the vehicle does not increase, the size of the vehicle can be achieved.

In the invention of claim 2, since the escape portion is provided on the round tube frame, the bending process of the frame can be easily performed compared with the square tube frame.

Therefore, the force from the road surface is received by the rigid square tube frame via the rear shock absorber, and the weight of the round tube frame can be reduced. At the same time, since the round tube frame can be easily bent, the processing cost of the frame can also be reduced.

In the invention of claim 3 , the power unit includes the outside air intake member, and since the outside air intake member is provided so as to overlap with the escaping portion, the vehicle can be downsized without increasing the width of the vehicle.

In the invention of claim 4, the left and right frames extend toward the rear of the vehicle and obliquely upward, and are arranged so as to overlap near the seat support portion, so that the seat can be easily attached.

In addition, there is no need to add new parts to attach the seat to the left and right vehicle frames.

Description of drawings

Fig. 1 is a left side view of the motorcycle of the present invention.

Fig. 2 is a sectional view illustrating an engine cooling mechanism arranged around the engine of the present invention.

Fig. 3 is a perspective view illustrating an engine cooling mechanism arranged around the engine of the present invention.

Fig. 4 is a left side view illustrating the frame structure of the motorcycle of the present invention.

Fig. 5 is a 5-direction view of Fig. 4 .

FIG. 6 is an enlarged view of six parts in FIG. 4 .

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

Fig. 8 is an action diagram illustrating the positional relationship between the main frame and the action unit.

In the figure, 10-automatic two-wheel vehicle, 15-power unit, 24L-left frame, 24R-right frame, 25-main frame, 31-rear buffer unit, 64-external air intake component, 81-repeat Department, 82-avoidance department, 83-round tube frame, 84-square tube frame.

Detailed ways

The best mode for carrying out the present invention will be described below with reference to the drawings. In the drawings, "front", "rear", "left", "right", "upper", and "lower" represent directions seen from the driver. Also, the drawings are formed as viewed along the symbol direction.

1 is a left side view of the motorcycle of the present invention. The motorcycle 10 as a scooter type vehicle swings a power unit 15 via a link mechanism 14 including a pivot shaft 12 at the rear of a vehicle body frame 11. A vehicle that is freely mounted on the vehicle body frame 11.

The power unit 15 is composed of an engine 16 as a drive source and a transmission case 17 provided behind the engine 16 . A belt-type continuously variable transmission 18 that transmits the driving force of the engine 16 to rear wheels 19 is incorporated in the transmission case 17 . And, by providing the transmission case 17 in a swingable manner at the rear end portion of the vehicle body frame 11 , the power of the engine 16 is transmitted to the rear wheels 19 .

The vehicle body frame 11 is composed of a head pipe 21, a down frame 22 installed on the head pipe 21 and extending obliquely rearward and then extending substantially horizontally rearward, a beam 23 mounted on the rear end of the down frame 22, and a The beam 23 is constituted by left and right vehicle frames 24L, 24R standing obliquely rearward.

The main frame 25 is constituted by the down frame 22 , the beam 23 , and the left and right frames 24L, 24R.

Further, in the motorcycle 10 , a front fork 26 is attached to the head pipe 21 so as to be steerable, a front wheel 28 is attached to the lower end of the front fork 26 , and a steering handle 29 is attached to the upper portion of the front fork 26 .

The rear wheel 19 is attached to the rear end of the power unit 15 which doubles as a rear swing arm, and the rear buffer unit 31 is erected between the rear part of the power unit 15 and the vehicle frame 24L.

The link mechanism 14 installed between the power unit 15 and the beam 23 includes: a support shaft 32 arranged near the beam 23, a link member 33 extending rearward from the support shaft 32, and a link member 33 arranged behind the link member 33. Pivot 12 at the end.

An opening 35 for taking in outside air is provided at the front portion 17 a of the transmission case 17 , and a duct 36 serving as an outside air introduction pipe is connected to the opening 35 .

The belt type continuously variable transmission 18 is cooled by providing an opening 35 in the transmission case 17 , connecting a duct 36 to the opening 35 , and supplying external air into the transmission case 17 through the duct 36 .

An intake device 38 and an exhaust device 39 are connected to a cylinder block 37 of the engine 16 constituting the front portion of the power unit 15 .

The intake device 38 is composed of an air filter 41 and a fuel supply device 42 connected to the air filter 41 .

The exhaust device 39 is composed of an exhaust pipe 43 connected to the engine 16 and extending rearward, and a muffler 44 connected to the exhaust pipe 43 and extending rearward.

On the vehicle frames 24L, 24R, a storage box 45 opening upward is provided, a seat 46 for a passenger to sit on is provided above the storage box 45, and a fuel tank 47 is arranged behind the storage box 45, and the fuel tank 47 can be connected from these storage boxes 45 and The seat 46 is mounted on the top of the fuel tank 47 to open and close.

51 is a pedal frame for a passenger, 52 is a pedal support frame for supporting pedal 58, 53 is a handrail, 54 is a front brake unit, 55 is a front fender, 56 is a front wall member, and 57 is a rear fender plate.

That is, the motorcycle 10 is a scooter-type vehicle that includes a vehicle body frame 11 that is swingably mounted on the vehicle body frame 11 and that has a built-in drive force of the engine 16 backward. The transmission case 17 of the belt-type continuously variable transmission 18 transmitted by the wheel, the seat 46 that is arranged on the passenger's straddle seat above the vehicle body frame 11, the storage box 45 that is arranged below the seat 46 to store items, and the storage box 45 and the transmission case are arranged 17 to guide the duct 36 of outside air to the transmission case 17.

FIG. 2 is a sectional view illustrating an engine cooling mechanism disposed around the engine of the present invention, and FIG. 3 is a perspective view illustrating the engine cooling mechanism disposed around the engine of the present invention. Hereinafter, description will be made with reference to FIGS. 2 and 3 .

The engine cooling mechanism 60 is provided with a case member 61 around the cylinder block 37 of the engine 16, a fan 62 for supplying outside air to the case member 61 is provided on the side of the case member 61, and an outside air inlet is provided on the side of the fan 62. 63 outside air intake member 64.

The front end portion of the case member 61 is engaged with the front portion 16 f of the engine 16 , and the rear end portion of the case member 61 is attached to the transmission case 17 via bolts 65 .

The fan 62 is coupled to a crankshaft 66 of the engine 16 . As the rotary fan 62 of the engine 16 rotates, outside air is taken in from the outside air inlet 63 to the inside of the casing member 61 .

An outside air intake member 64 having an outside air intake port 63 is provided on the right side of the vehicle, and a discharge port 67 for discharging exhausted heat air is provided at a lower portion of the shell member 61 . The engine 16 is cooled by taking in external air from the external intake port 63 , passing the external air between the casing member 61 and the engine 16 , and discharging exhaust air heated by the engine 16 from the discharge port 67 . In the figure, 68 is a bolt for fixing the external air intake member 64 to the case member 61 .

Fig. 4 is a left side view illustrating the frame structure of the motorcycle of the present invention, and Fig. 5 is a view from the 5th direction of Fig. 4 . The following description will be made with reference to FIG. 4 and FIG. 5 .

The vehicle body frame 11 includes: a down frame 22 installed on the head pipe 21 and extending obliquely rearward and then extending substantially horizontally rearward; , and left and right vehicle frames 24L, 24R erected obliquely rearward from side surfaces 23s, 23s at both ends of the beam 23.

In the figure, 71 is a bracket for supporting the front wall member, 72 is a reinforcing member for improving the bonding strength between the head pipe 21 and the down frame 22, and 73 is a supporting storage box erected between the left and right frames 24L and 24R (Fig. 1 74L, 74R are pivot plates supporting the power unit 15, 75 is a seat horizontal frame, 76 is a rear horizontal frame, 77 is a buffer bracket for installing the rear buffer unit 31, 78 For installing the bracket of rear fender 57.

Returning to FIG. 2 , when the vehicle is viewed from above, an overlapping portion 81 overlapping with the power unit 15 is provided on the right side frame 24R among the left and right vehicle frames 24L, 24R, and an escape portion 82 is formed on the overlapping portion 81 so as to Dodge from the power unit 15 to the top of the vehicle.

Referring to FIG. 4 , the escape portion 82 is an area on the overlapping portion 81 where the right frame 24R is located above the left frame 24L when the vehicle body frame 11 is viewed from the side.

The left and right frames 24L, 24R include a circular tube frame 83 and a square tube frame 84 , and the escape portion 82 is provided on the circular tube frame 83 constituting the right frame 24R. In addition, the rear cushion unit 31 is coupled to the square tube frame 84 .

Since the escape portion 82 is provided on the round pipe frame 83 , the frame including the escape portion 82 can be processed more easily than the square pipe frame 84 . Therefore, the force from the road surface is received by the rigid square tube frame 84 via the rear shock absorber 31, and the weight of the round tube frame 83 can be reduced. At the same time, since the round pipe frame 83 can be easily bent, the processing cost of the vehicle body frame 11 can also be reduced.

Referring to FIG. 2 , in detail, the power unit 15 includes an outside air intake member 64 for taking in outside air for cooling the power unit 15 . The outside air intake member 64 is provided so as to overlap the escape portion 82 when the vehicle is viewed from above.

Conventionally, in order to avoid interference with the outside air intake member 64 provided on the power unit 15 , a part of the main frame 25 was extended outwardly, which resulted in an increase in vehicle width.

In this regard, in the present invention, since the outside air intake member 64 is provided to overlap the escape portion 82, the vehicle width can be reduced without causing an increase in the vehicle width.

Returning to FIG. 1 , the left and right frames 24L, 24R extend toward the rear of the vehicle and obliquely upward, and are arranged to overlap near the seat support portion 85 including the seat cross frame 75 and the rear cross frame 76 when the vehicle is viewed from the side.

The left and right frames 24L, 24R extend toward the rear of the vehicle and obliquely upward, and are arranged overlappingly near the seat support portion 85 of the support base 46 , so that the seat 46 can be easily attached without adding new components.

Fig. 6 is an enlarged view of six parts of Fig. 4 , and a left pivot plate 74L formed in a plate shape and having a pivot hole 87 is mounted by welding on the left end of the beam 23, and the left pivot plate 74L is welded on the outside of the left pivot plate 74L. A pedal support frame 52 , a passenger pedal frame 91 , and a bracket (52 in FIG. 1 ) bracket 92 are attached. In addition, the pedal support frame 52 is a member that supports the pedals (symbol 58 in FIG. 1 ). A support shaft (symbol 32 in FIG. 1 ) is attached to the pivot hole 87 .

Fig. 7 is a cross-sectional view taken along line 7-7 of Fig. 5. A right pivot plate 74R formed into a plate shape and having a pivot hole 87 is installed by welding at the right end of the beam 23, and a right pivot plate 74R is used outside the right pivot plate 74R. The pedal support frame 52 and the passenger pedal frame 91 are respectively attached by welding.

A support shaft (symbol 32 in FIG. 1 ) is attached to the pivot hole 87 .

Returning to FIG. 5 , the frame structure of the scooter-type vehicle 20 includes: a main frame 25 , a pivot portion 86 which is arranged on the main frame 25 and swingably connects the power unit (symbol 15 in FIG. 1 ), Pedal support frames 52 and 52 are provided on the pivot plates 74L and 74R constituting the pivot portion 86 and support the pedals (symbol 58 in FIG. 1 ).

As mentioned above, the beam 23 is directly welded to the pivot portion 86 . In addition, the pedal support frames 91 , 91 are directly welded to the pivot portion 86 .

In this embodiment, the vehicle body frame 11 is made of carbon steel, but aluminum alloy can also be used.

Welding is fillet welding in which the boundaries of the respective workpieces are melted and a filler material is added to join the workpieces. As the welding method, an arc welding method can be used, and methods such as a gas welding method and a laser welding method can also be used.

The action of the frame structure of the above-mentioned motorcycle will be described below.

Returning to FIG. 2 , since the avoidance portion 82 is formed on the right frame 24R as one side frame, the power unit can be avoided even if there is an overlapping portion 81 where the right frame 24R and the power unit 15 overlap. 15 interference with the avoidance part 82.

In addition, since the avoidance portion 82 is provided toward the upper side of the vehicle, the width of the vehicle does not increase. Since the width of the vehicle does not increase, the size of the vehicle can be reduced.

Fig. 8 is an action diagram illustrating the positional relationship between the main frame and the action unit.

An escape portion 82 is formed on the overlapping portion 81 so as to escape from the power unit 15 to the upper side of the vehicle. Since the escape portion 82 is formed on the main frame 25, even if the power unit 15 swings up and down greatly, interference between the power unit 15 and the main frame 25 can be avoided, and the buffer stroke of the rear wheel 19 can be increased. When the power unit 15 swings, there is no possibility of interference between the external air intake member 64 and the main frame 25 .

In the figure, a part of the air filter 41 overlaps with the vehicle frames 24L, 24R. However, since the air filter 41 is arranged between the left vehicle frame 24L and the right vehicle frame 24R, the air filter 41 does not overlap with the vehicle frames. Frames 24L, 24R interfere.

Returning to Fig. 5, the pedal support frame 52, 52 supporting the pedal (symbol 58 in Fig. 1) is directly welded to the pivot portion 86, 86 including the pivot plate 74L, 74R without other members, so that the vehicle can be simplified. Body frame 11 structure. In addition, the number of parts of the vehicle body frame 11 can also be reduced. At the same time, since the structure of the vehicle body frame 11 is simplified, the welding man-hours for welding the vehicle body frame 11 can be reduced. Furthermore, weight reduction of the vehicle body frame 11 can also be achieved.

Referring to FIGS. 1 and 2 , the round pipe frame 83 , which is easier to process than the square pipe frame 84 , is disposed on the side where the outside air intake member 64 is disposed, thereby easily avoiding interference with the power unit 15 .

In addition, by arranging the square pipe frame 84 on the other side, sufficient strength can be given to the left side frame 24L to which the rear buffer unit 31 is connected.

In addition, the vehicle frame structure of the present invention is applied to a motorcycle in the embodiments, but it can also be applied to a saddle type vehicle.

In addition, in the technical solution 1, the left and right frames can be formed by using only circular tube frames, or the left and right frames can be formed by only square tube frames.

Industrial availability

The present invention is suitable for small motorcycle type automatic two-wheel vehicles.

Claims (7)

1. An automatic two-wheeled vehicle, comprising: a main frame with two left and right frames, a power unit swingably arranged on the main frame, a rear portion of the power unit and the main frame Between the rear buffer unit, the automatic two-wheeled vehicle is characterized in that, An overlapping portion that overlaps the power unit when the vehicle is viewed from above is provided on any one of the left and right frames, and an escape portion that avoids the power unit toward the upper side of the vehicle is formed on the overlapping portion. 2. The automatic two-wheel vehicle according to claim 1, characterized in that, The left and right frames include a round tube frame and a square tube frame, the rear buffer unit is combined on the square tube frame, and the avoidance part is arranged on the round tube frame. 3. The automatic two-wheel vehicle according to claim 1 or 2, characterized in that, The power unit includes an outside air intake member for taking in outside air to cool the power unit, and the outside air intake member is provided so as to overlap the escape portion when the vehicle is viewed from above. 4. The automatic two-wheel vehicle according to claim 1, characterized in that, The left and right frames extend toward the rear of the vehicle and obliquely upward, and are disposed so as to overlap near the seat support portion when the vehicle is viewed from the side. 5. The automatic two-wheeled vehicle according to claim 3, wherein: The left and right frames extend toward the rear of the vehicle and obliquely upward, and are disposed so as to overlap near the seat support portion when the vehicle is viewed from the side. 6. The automatic two-wheel vehicle according to claim 1, characterized in that, The main frame includes: a head tube, a down frame installed on the head tube and extending obliquely rearward and then extending substantially horizontally rearward, installed on the rear end of the down frame and extending along the vehicle a cross beam extending in the width direction, left and right frames standing obliquely rearward from both ends of the cross beam, and a seat cross frame disposed approximately in the middle in the front-rear direction of the left and right frames, The square pipe frame extends substantially linearly from the cross beam to the seat cross frame, and the round pipe frame extends upwardly from the cross beam to the seat cross frame in a curved manner, thereby making the The overlapping portion is formed to avoid the power unit toward the upper side of the vehicle when the vehicle is viewed from the side. 7. The automatic two-wheel vehicle according to claim 1, characterized in that, The power unit is supported so as to be able to swing about a pivot disposed below the cylinder block.

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