WO2012147190A1 - Frame for motorcycle - Google Patents

Frame for motorcycle Download PDF

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Publication number
WO2012147190A1
WO2012147190A1 PCT/JP2011/060389 JP2011060389W WO2012147190A1 WO 2012147190 A1 WO2012147190 A1 WO 2012147190A1 JP 2011060389 W JP2011060389 W JP 2011060389W WO 2012147190 A1 WO2012147190 A1 WO 2012147190A1
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WO
WIPO (PCT)
Prior art keywords
main frame
frame
vehicle
cross
pipe
Prior art date
Application number
PCT/JP2011/060389
Other languages
French (fr)
Japanese (ja)
Inventor
英亮 中川
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to CN201180070170.1A priority Critical patent/CN103492260B/en
Priority to BR112013026820-4A priority patent/BR112013026820B1/en
Priority to JP2013511844A priority patent/JP5734417B2/en
Priority to PCT/JP2011/060389 priority patent/WO2012147190A1/en
Publication of WO2012147190A1 publication Critical patent/WO2012147190A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00—Cycle frames
    • B62K19/02—Cycle frames characterised by material or cross-section of frame members
    • B62K19/04—Cycle frames characterised by material or cross-section of frame members the material being wholly or mainly metallic, e.g. of high elasticity
    • B62K19/06—Cycle frames characterised by material or cross-section of frame members the material being wholly or mainly metallic, e.g. of high elasticity tubular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J35/00—Fuel tanks specially adapted for motorcycles or engine-assisted cycles; Arrangements thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
    • B62K11/02—Frames
    • B62K11/04—Frames characterised by the engine being between front and rear wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00—Cycle frames
    • B62K19/02—Cycle frames characterised by material or cross-section of frame members

Definitions

  • the present invention relates to a frame for a motorcycle.
  • Patent Document 1 discloses a motorcycle frame in which one main frame extends from the head pipe to the rear of the vehicle.
  • the motorcycle frame disclosed in Patent Document 1 includes one head pipe, one main frame extended from the head pipe, and two left and right seat rails extended from the main frame to the rear of the vehicle. And one pivot frame extending downward from the main frame.
  • the two left and right seat rails are prepared separately from one main frame.
  • Two seat rails are joined to the rear of one main frame.
  • Such a motorcycle frame has a large number of parts.
  • the number of processing steps for joining increases.
  • a frame for a motorcycle capable of reducing the number of parts and processing man-hours is desired.
  • An object of the present invention is to provide a frame for a motorcycle that can reduce the number of parts and the number of processing steps.
  • a hollow main frame having a bent portion extending in the longitudinal direction of the vehicle and bent in a V-shape in a vehicle side view at an intermediate portion, and a left and right wall car
  • a motorcycle frame comprising a cross pipe for suppressing displacement in the width direction, a head pipe provided at the end of the main frame in the vehicle longitudinal direction, and a pivot frame extending downward from the main frame.
  • the left and right walls of the bent portion have holes through which the cross pipe passes.
  • the upper end of the pivot frame is connected to the main frame in front of the vehicle than a bent portion of the main frame.
  • the sub-frame is connected between the rear upper portion of the pivot frame and the main frame at the rear of the vehicle than the bent portion of the main frame.
  • the main frame has a longitudinally long flat portion whose cross-sectional shape exhibits a vertically long flat shape in the height direction at the front end in the vehicle longitudinal direction, and a cross-sectional shape is circular at a bent portion located rearward of the longitudinally long flat portion. It consists of a circular portion which exhibits and a horizontally long flat portion which is located at the rear of the vehicle of the circular portion and which has a cross-sectional shape which is long in the vehicle width direction from the circular shape in the vehicle seat.
  • the cross pipe includes a tank receiving portion extending in the vehicle width direction above the bent portion and receiving the fuel tank, and left and right legs extending downward from both ends of the tank receiving portion and fixed to the cross pipe.
  • a fuel tank stay is provided.
  • the cross pipe has an air intake hole through which the air flowing in the main frame is taken.
  • Mainframes are built from pipes. Since the main frame includes the seat rails, the number of parts of the frame can be reduced. By reducing the number of parts of the frame, it is possible to reduce the number of processing steps of the frame.
  • the main frame is bent at a bending portion, supported at the front by the front wheel and supported at the rear by the rear wheel.
  • the displacement in the main frame is greater at the bends in the middle.
  • the cross pipes are passed to the left and right walls of the bent portion.
  • the cross pipe suppresses the displacement of the left and right walls of the bent portion in the vehicle width direction. Since the cross pipe portion is provided at the bending portion, the bending portion is unlikely to be deformed in the vehicle width direction.
  • FIG. 1 is a left side view of a motorcycle adopting a frame according to the present invention. It is a perspective view of this frame. It is a left side view of the frame.
  • FIG. 5 is a cross-sectional view taken along line 4-4 of FIG. 3; 5 is a cross-sectional view taken along line 5-5 of FIG. 3;
  • FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 3; It is a top view of the frame which equipped the fuel tank. It is a figure explaining the arrangement
  • FIG. 10 is a cross-sectional view taken along line 10-10 of FIG.
  • the motorcycle 10 includes a frame 11, an engine 12 suspended by the frame 11, a front wheel 15 provided at the front end of the frame 11 and steered by a steering wheel 13, and a rear portion of the frame 11. It has a rear wheel 16 provided and driven by the engine 12 and a seat 17 provided between the front wheel 15 and the rear wheel 16.
  • the motorcycle 10 is a saddle-ride type vehicle in which the rider sits on the seat 17 straddling.
  • the frame 11 swings a swing arm 23 extending downward from a head pipe 21, a hollow main frame 22 extending from the head pipe 21 in the longitudinal direction of the vehicle, and an intermediate portion of the main frame 22.
  • a car is provided with a pivot frame 24 freely supported, a down frame 25 extending obliquely downward and backward from the lower part of the head pipe 21 to support the front of the engine 12, and a bent portion 26 bent at an intermediate portion of the main frame 22.
  • a bending portion 26 of the main frame 22 is disposed at the rear of the vehicle at a position where the pivot frame 24 branches from the main frame 22.
  • the upper end of the pivot frame 24 is connected to the main frame 22 at a position forward of the vehicle from the bending portion 26 of the main frame 22.
  • the pivot frame 24 extended downward from the main frame 22 is a bent plate, and has a rear surface 24H facing the rear of the vehicle.
  • the upper half 45 constituting the upper half in the height direction has a cross-sectional square shape
  • the lower half 46 constituting the lower half in the height direction has a U-shaped cross section open to the front of the vehicle.
  • a cylindrical portion 48 through which a pivot shaft (47 in FIG. 1) passes is passed in the vehicle width direction.
  • the sub-frame 31 is connected between the rear upper portion 24Ha of the pivot frame 24 and the main frame 22 at the rear of the vehicle than the bent portion 26 of the main frame 22.
  • the main frame 22 is bent at the bending portion 26 and has a V-shape in a side view of the vehicle.
  • the swing arm 23 is swingably supported around a cylindrical portion 48 provided on the pivot frame 24.
  • a front fork 41 supporting the front wheel 15 is steerably provided on the head pipe 21, and a handle 13 integrated with the front fork 41 above the head pipe 21 for steering operation by an occupant is provided.
  • a front fender 42, a headlight 43 and a meter 44 are attached to the side of the front fork 41.
  • An engine hanger 51 is provided at the lower part of the down frame 25, and a front portion 12 a of the engine is attached to the engine hanger 51. Also, the rear part 12 b of the engine is attached to the pivot frame 24.
  • a fuel tank 52 is attached to the main frame 22 at a position above the engine 12, and a seat 17 is attached to the main frame 22 so as to extend continuously to the rear of the vehicle at the rear end of the fuel tank 52.
  • the main frame 22 is a so-called mono backbone frame that includes a seat rail 107 that supports the seat 17.
  • the engine 12 includes a crankcase 61 incorporating a transmission, a cylinder block 62 extending upward from the crankcase 61, a cylinder portion 64 including a cylinder head 63, and a head cover 65 covering the cylinder head 63 of the cylinder portion 64; It comprises an intake system 70 connected to the rear wall 63b of the cylinder head 63, and an exhaust system 80 connected to the front wall 63a of the cylinder head and extending rearward from the front of the vehicle.
  • the exhaust system 80 includes an exhaust pipe 81 extending forward from the cylinder head 63 and downward and further rearward of the vehicle, and a silencer 82 connected to the rear end of the exhaust pipe 81 and extending rearward of the vehicle. Become.
  • the intake system 70 includes an air cleaner 71 disposed below the seat 17, a connecting tube 72 extended from the air cleaner 71 to the front of the vehicle, a throttle body 73 connected to the tip of the connecting tube 72, and the throttle And an intake pipe 74 extended from the body 73 to the front of the vehicle and connected to the rear wall 63b of the cylinder head.
  • the pivot shaft 47 is extended leftward and rightward in the vehicle width direction
  • the swing arm 23 is extended from the pivot shaft 47 rearward of the vehicle
  • the rear wheel 16 is attached to the rear end of the swing arm 23.
  • the rear cushion 32 is passed between the vehicle rear end 23b of the swing arm 23 and the rear portion 22b of the main frame, so that the rear wheel 16 is supported by the frame 11 so as to freely swing.
  • a front tank stay 91 supporting the front end of the fuel tank (FIG. 1, reference numeral 52) is erected on the front upper surface of the main frame 22, and the rear end of the fuel tank 52 After support, a tank stay 92 is erected.
  • holes 93 and 94 through which the cross pipe 27 can pass are made in the left and right walls 35 and 36 constituting the bent portion 26, and the cross pipe 27 passes through these holes 93 and 94. And fixed. Since the left and right walls 35, 36 are fixed by the cross pipe 27, displacement of the left and right walls 35, 36 in the vehicle width direction is suppressed.
  • the cross pipe 27 is inserted into the holes 93 and 94 to cross the main frame 22
  • the pipe 27 can be positioned.
  • the cross pipe 27 can be easily assembled to the main frame 22, and the workability for assembling can be enhanced.
  • the width W1 of the left and right walls 35 and 36 of the bent portion 26, the length in the vehicle width direction of the cross pipe 27 is W2, and when the cross pipe 27 is equally disposed in the vehicle width direction left and right, A cross pipe 27 projects from the outer end. That is, the dimensional relationship between the width W1 of the bent portion 26 located in the middle portion of the main frame 22 and the width W2 of the cross pipe 27 is in the relationship of W1 ⁇ W2, and is projected from the left and right walls 35, 36 of the main frame.
  • the rear tank stay 92 can be fixed to the portion of the cross pipe 27 that is used. That is, the cross pipe 27 is provided with a rear tank stay 92 as a fuel tank stay.
  • the rear tank stay 92 extends in the vehicle width direction above the bending portion 26 and receives the fuel tank 52.
  • the rear tank stay 92 extends downward from both ends in the vehicle width direction of the tank receiving portion 95 to the cross pipe 27.
  • the left and right legs 96L and 96R are fixed.
  • the dimensional relationship between the outer width W3 of the tank receiving portion 95, the width W1 of the main frame 22, and the width W2 of the cross pipe 27 is in the relationship of W1 ⁇ W3 ⁇ W2.
  • the left and right holes 97, 97 for attaching the fuel tank (FIG. 12, reference numeral 52) are opened in the tank receiving portion 95, and the fuel tank is provided on the lower surface 95b of the tank receiving portion in alignment with the left and right holes 97, 97.
  • Weld nuts 98, 98 are secured such that 52 is tightened.
  • the tank receiving portion 95 for receiving the fuel tank 52 has a vehicle width direction length W3 longer than the vehicle width direction length W1 of the main frame 22 (W1 ⁇ W3). By extending the cross pipe 27 wider in the vehicle width direction than the main frame 22, the width direction length of the tank receiving portion 95 can be increased, and the fuel tank 52 can be supported in a wider region in the vehicle width direction.
  • An air intake hole 101 is formed in the cross pipe 27 through which the outside air supplied to the intake system 70 passes.
  • the main frame 22 has a longitudinally long flat portion 103 having a longitudinally long flat shape in the height direction at the front end in the longitudinal direction of the vehicle, and a bent portion located behind the longitudinally long flat portion 103 And a circular portion 105 having a circular cross section.
  • the main frame 22 can be made to correspond to the load applied to each portion.
  • the main frame 22 has a circular portion 105 having a circular cross-sectional shape at the bending portion 26, and a seat rail (FIG. 1, reference numeral 107) positioned behind the circular portion 105 in the vehicle. And a horizontally long flat portion 104 having a horizontally long flat shape which is long in the vehicle width direction from a circular shape.
  • the mounting structure of the fuel tank will be described. As shown in FIG. 7, the front portion of the fuel tank 52 is fastened to the center of the front tank stay 91 in the vehicle width direction via the fastening bolt 111, and the fastening bolt 111, The rear portion of the fuel tank 52 is fastened via 111.
  • a tank cover 113 is disposed on the side of the fuel tank 52.
  • the fuel tank 52 is covered with the tank cover 113.
  • a side cover 114L is disposed so as to be continuous with the vehicle rear of the tank cover 113 behind the vehicle of the tank cover 113.
  • the left side of the vehicle middle portion is covered with the side cover 114L.
  • the intake system 70 extends from the cross pipe 27 with a hollow portion 121 of the main frame, and a cross pipe 27 having an air intake hole 101 through which outside air passes toward the rear of the main frame.
  • the cylindrical connecting pipe 123, the air cleaner 71 connected to the end of the connecting pipe 123, and the throttle body (FIG. 1, reference numeral 73) of the engine (FIG. 1, reference numeral 12) extended forward from the air cleaner 71.
  • a connecting tube 72 connected to the
  • the outside air enters from the rear end of the vehicle of the main frame 22 from the rear of the vehicle to the front through the hollow portion 122 of the cross pipe as shown by arrow a, through the connecting pipe 123 connected to the cross pipe 27, and reaches the air cleaner 71,
  • the air cleaner 71 removes foreign substances such as dust and dirt mixed in the outside air, passes through the connecting tube 72, and is supplied to the throttle body (symbol 73 in FIG. 1) connected to the end of the connecting tube 72. Be done.
  • a cover member 125 for closing the left end of the cross pipe 27 is provided at the left end of the cross pipe 27 penetrating in the vehicle width direction to the left and right walls 35, 36 constituting the bent portion 26 of the main frame 22.
  • Attached to the right end of the cross pipe 27 is a connecting pipe 123 for guiding the outside air to the air cleaner (71 in FIG. 8).
  • the left side cover 114L is disposed on the left side of the cross pipe 27 in the vehicle width direction
  • the right side cover 114R is disposed on the right side of the cross pipe 27 in the vehicle width direction. Since the left end of the cross pipe 27 is closed by the lid member 125, the outside air which has passed through the air intake hole 101 is guided to the connecting pipe 123 connected to the right end of the cross pipe 27.
  • the air cleaner support member 127 is fixed to the main frame 22, and the air cleaner support member 127 is extended downward and fitted into the opening 127a opened in the air cleaner support member 127.
  • the half 131 is fitted.
  • the cleaner left half 131 is fastened to the air cleaner support member 127 via fastening screws 134.
  • the cleaner right half 132 having an element 133 is engaged with the cleaner left half 131 from the right side of the vehicle, and the cleaner right half 132 is held by the right side cover 114R from the right in the vehicle width direction.
  • the outside air guided to the connecting pipe 123 is guided to a space 135 (dirty side space 135) enclosed between the element 133 and the right side cover 114R, passes through the element 133, and is a clean side element 133 and cleaner A space 136 (clean side space 136) surrounded by the right half 132 and the cleaner left half 131 reaches the engine (connecting tube 72) connected to the clean side space 136 (FIG. 1, reference numeral 12) Sent to the side.
  • outside air passes from the main frame 22 through the air intake hole 101 and is input to the cross pipe 27 and passes through the connecting pipe 123 as a pipe connected to the cross pipe 27. Is input to the air cleaner 71. Since the cross pipe 27 which is a component of the frame 11 doubles as a part of the intake duct, the intake duct connected to the air cleaner 71 can be shortened. As a result, the number of parts can be reduced.
  • the front wheel 15 is steerably supported by the head pipe 21 via the front fork 41, and the rear cushion 32 and the swing arm 23 are provided at the rear portion 22b of the main frame extending from the head pipe 21 to the vehicle rear.
  • the rear wheel 16 is pivotally supported via the support. As described above, in order to support the front wheel 15 at the front end of the main frame 22 and support the rear wheel 16 at the rear of the main frame 22, a large load is applied to the bent portion 26 located at the vehicle longitudinal direction middle portion of the main frame 22.
  • the cross pipe 27 is passed to the left and right walls 35 and 36 of the bent portion 26 to which a large load is applied.
  • the cross pipe 27 By passing the cross pipe 27 between the left and right walls 35, 36, displacement of the left and right walls 35, 36 in the vehicle width direction of the bent portion can be suppressed.
  • the bent portion 26 By providing the bent portion 26 with the cross pipe 27 extending in the vehicle width direction, it is possible to enhance the rigidity against the load for deforming the bent portion 26 in the vehicle width direction.
  • the main frame 22 is a hollow member, and a bent portion 26 to which a large load is applied is reinforced by a cross pipe 27. Since the middle portion 22a of the main frame 22 to which a large load is applied is reinforced in the vehicle width direction, the cross-sectional area of the sub-frame 31 can be reduced. By reducing the cross-sectional area of the sub-frame 31, the sub-frame 31 can be made smaller. In addition, since the main frame 22 is configured of one hollow frame, the cross-sectional area of the rear portion 22 b of the main frame can be reduced, and the size of the main frame 22 can be compact. As a result, it is possible to suppress the deformation of the left and right walls 35, 36 constituting the bent portion 26 in the vehicle width direction while suppressing the size of the main frame 22 in a compact manner.
  • the sub-frame 31 is connected between the rear upper portion 24Ha of the pivot frame 24 and the main frame 22 at the rear of the vehicle than the bent portion 26 of the main frame 22. Since the cross pipe 27 is provided in the bent portion 26, the rigidity of the main frame 22 can be further enhanced from the rear upper portion 24Ha of the pivot frame 24 to the upper end of the sub frame 31.
  • the main frame 22 is made of a pipe. If the main frame 22 is made of one pipe, the number of parts can be reduced, and by reducing the number of parts, the number of processing steps of the main frame 22 can be reduced.
  • the present invention is applied to a motorcycle in the embodiment, it can also be applied to a saddle-ride type three-wheeled vehicle (three-wheeled buggy) and a saddle-ride type four-wheeled vehicle (four-wheeled buggy). Applying to a two-wheeled vehicle is fine.
  • the present invention is suitable for a frame of a motorcycle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Cycles, And Cycles In General (AREA)

Abstract

In the present invention, a frame for a motorcycle comprises the following: a hollow main frame (22) which extends in the vehicle longitudinal direction and which has a bent part (26) bent in a V-shape at an intermediate portion thereof; a cross pipe (27) which forms a bridge between the left and right walls (35, 36) of the bent part to suppress displacement in the vehicle width direction of the left and right walls (35, 36); a head pipe (21) provided at the tip of the main frame (22) in the vehicle longitudinal direction; and a pivot frame (24) which extends downward from the main frame (22).

Description

自動二輪車用フレームMotorcycle frame
　本発明は、自動二輪車用フレームに関する。 The present invention relates to a frame for a motorcycle.
　ヘッドパイプから１本のメインフレームが車両後方に延びる形態の自動二輪車用フレームが特許文献１に開示されている。 Patent Document 1 discloses a motorcycle frame in which one main frame extends from the head pipe to the rear of the vehicle.
　特許文献１に開示される自動二輪車用フレームは、１本のヘッドパイプと、このヘッドパイプから延ばされる１本のメインフレームと、このメインフレームから車両後方へ延ばされる左右２本のシートレールと、メインフレームから下方に延ばされる１つのピボットフレームと、から成る。
　左右の２本のシートレールは、１本のメインフレームとは別に準備される。１本のメインフレームの後部に左右２本のシートレールが接合される。
　このような自動二輪車用フレームは、部品点数が多いものとなる。加えて、接合のための加工工数が嵩む。
　近年、車両コストの低減が求められる中、部品点数を減らし、加工工数を減らすことができる自動二輪車用フレームが望まれている。 The motorcycle frame disclosed in Patent Document 1 includes one head pipe, one main frame extended from the head pipe, and two left and right seat rails extended from the main frame to the rear of the vehicle. And one pivot frame extending downward from the main frame.
The two left and right seat rails are prepared separately from one main frame. Two seat rails are joined to the rear of one main frame.
Such a motorcycle frame has a large number of parts. In addition, the number of processing steps for joining increases.
In recent years, while reduction of vehicle cost is required, a frame for a motorcycle capable of reducing the number of parts and processing man-hours is desired.
特開２００９－１６１０１２公報JP, 2009-161012, A
　本発明の課題は、部品点数を減らし、加工工数を減らすことができる自動二輪車用フレームを提供することにある。 An object of the present invention is to provide a frame for a motorcycle that can reduce the number of parts and the number of processing steps.
　本発明によれば、車両長手方向に延び、中間部分において車両側面視でＶ字状に折り曲げられた折曲部を有する中空のメインフレームと、折曲部の左右壁に渡され左右壁の車幅方向への変位を抑制するクロスパイプと、メインフレームの車両長手方向先端に設けられるヘッドパイプと、メインフレームから下方に延びるピボットフレームと、から成ることを特徴とする自動二輪車用フレームが提供される。 According to the present invention, a hollow main frame having a bent portion extending in the longitudinal direction of the vehicle and bent in a V-shape in a vehicle side view at an intermediate portion, and a left and right wall car There is provided a motorcycle frame comprising a cross pipe for suppressing displacement in the width direction, a head pipe provided at the end of the main frame in the vehicle longitudinal direction, and a pivot frame extending downward from the main frame. Ru.
　好ましくは、折曲部の前記左右壁は、前記クロスパイプを貫通させる穴を有している。 Preferably, the left and right walls of the bent portion have holes through which the cross pipe passes.
　好ましくは、ピボットフレームの上端は、メインフレームの折曲部より車両前方にてメインフレームに接続される。 Preferably, the upper end of the pivot frame is connected to the main frame in front of the vehicle than a bent portion of the main frame.
　好ましくは、ピボットフレームの背面上部と、メインフレームの折曲部より車両後方にてメインフレームとの間に、サブフレームが連結される。 Preferably, the sub-frame is connected between the rear upper portion of the pivot frame and the main frame at the rear of the vehicle than the bent portion of the main frame.
　好ましくは、メインフレームは、車両長手方向前端にて断面形状が高さ方向に縦長扁平形状を呈する縦長扁平部と、この縦長扁平部の車両後方に位置する折曲部で断面形状が円形状を呈する円形状部と、この円形状部の車両後方に位置しシートレールにて断面形状が円形状から車幅方向に長い横長扁平形状を呈する横長扁平部と、から成る。 Preferably, the main frame has a longitudinally long flat portion whose cross-sectional shape exhibits a vertically long flat shape in the height direction at the front end in the vehicle longitudinal direction, and a cross-sectional shape is circular at a bent portion located rearward of the longitudinally long flat portion. It consists of a circular portion which exhibits and a horizontally long flat portion which is located at the rear of the vehicle of the circular portion and which has a cross-sectional shape which is long in the vehicle width direction from the circular shape in the vehicle seat.
　好ましくは、クロスパイプに、折曲部の上方を車幅方向に延びて燃料タンクを受けるタンク受け部と、このタンク受け部の両端から下方に延びてクロスパイプに固定される左右脚部と、から成る燃料タンクステーが設けられている。 Preferably, the cross pipe includes a tank receiving portion extending in the vehicle width direction above the bent portion and receiving the fuel tank, and left and right legs extending downward from both ends of the tank receiving portion and fixed to the cross pipe. A fuel tank stay is provided.
　好ましくは、クロスパイプは、メインフレーム内を流れる空気が取り入れられる空気取入穴を有している。 Preferably, the cross pipe has an air intake hole through which the air flowing in the main frame is taken.
　メインフレームにシートレールを一体的に含める。メインフレームはパイプから造られる。メインフレームにシートレールが含まれるため、フレームの部品点数を減らすことができる。フレームの部品点数を減らすことで、フレームの加工工数を減らすことができる。 Include the seat rails integrally in the main frame. Mainframes are built from pipes. Since the main frame includes the seat rails, the number of parts of the frame can be reduced. By reducing the number of parts of the frame, it is possible to reduce the number of processing steps of the frame.
　メインフレームは、折曲部で折り曲げられ、前部が前輪で支持され、後部が後輪で支持される。メインフレームにおける変位は、中間部の折曲部で大きくなる。 The main frame is bent at a bending portion, supported at the front by the front wheel and supported at the rear by the rear wheel. The displacement in the main frame is greater at the bends in the middle.
　本発明では、折曲部の左右壁に、クロスパイプが渡されている。このクロスパイプで、折曲部の左右壁の車幅方向での変位を抑制する。
　折曲部に、クロスパイプ部が設けられているため、折曲部は、車幅方向に変形し難いものとなる。 In the present invention, the cross pipes are passed to the left and right walls of the bent portion. The cross pipe suppresses the displacement of the left and right walls of the bent portion in the vehicle width direction.
Since the cross pipe portion is provided at the bending portion, the bending portion is unlikely to be deformed in the vehicle width direction.
本発明によるフレームを採用した自動二輪車の左側面図である。FIG. 1 is a left side view of a motorcycle adopting a frame according to the present invention. 該フレームの斜視図である。It is a perspective view of this frame. 該フレームの左側面図である。It is a left side view of the frame. 図３の４－４線断面図である。FIG. 5 is a cross-sectional view taken along line 4-4 of FIG. 3; 図３の５－５線断面図である。5 is a cross-sectional view taken along line 5-5 of FIG. 3; 図３の６－６線断面図である。FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 3; 燃料タンクを装着した該フレームの平面図である。It is a top view of the frame which equipped the fuel tank. 該フレームと吸気系の配置関係を説明する図である。It is a figure explaining the arrangement | positioning relationship of this flame | frame and an intake system. 図８の９－９断面図である。It is 9-9 sectional drawing of FIG. 図８の１０－１０断面図である。FIG. 10 is a cross-sectional view taken along line 10-10 of FIG.
　以下に、本発明の好適な実施例を添付図面に基づいて説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings.
　先ず、本発明の実施例を図面に基づいて説明する。
　図１に示すように、自動二輪車１０は、フレーム１１と、このフレーム１１に懸架されるエンジン１２と、フレーム１１の前端に設けられハンドル１３によって操向される前輪１５と、フレーム１１の後部に設けられエンジン１２によって駆動される後輪１６と、前輪１５と後輪１６の間に設けられるシート１７とを有する。自動二輪車１０は、このシート１７に乗員が跨って座る態様の鞍乗り型車両である。 First, an embodiment of the present invention will be described based on the drawings.
As shown in FIG. 1, the motorcycle 10 includes a frame 11, an engine 12 suspended by the frame 11, a front wheel 15 provided at the front end of the frame 11 and steered by a steering wheel 13, and a rear portion of the frame 11. It has a rear wheel 16 provided and driven by the engine 12 and a seat 17 provided between the front wheel 15 and the rear wheel 16. The motorcycle 10 is a saddle-ride type vehicle in which the rider sits on the seat 17 straddling.
　次に、フレームの構造について説明する。
　図２に示すように、フレーム１１は、ヘッドパイプ２１と、このヘッドパイプ２１から車両長手方向に延びる中空のメインフレーム２２と、このメインフレーム２２の中間部から下方へ延びスイングアーム２３を揺動自在に支持するピボットフレーム２４と、ヘッドパイプ２１の下部から車両斜め下後方へ延びエンジン１２の前部を支持するダウンフレーム２５と、メインフレーム２２の中間部分にて折り曲げられる折曲部２６に車幅方向に渡されるクロスパイプ２７と、このクロスパイプ２７の後方位置でメインフレーム２２とピボットフレーム２４の間に渡されるサブフレーム３１と、クロスパイプ２７の車両後方位置で車幅方向に延ばされると共にメインフレーム２２の上面に固着されリヤクッション（図１、符号３２）の上端が取付けられるクッションフレーム３３と、クロスフレーム１１の車両後方にて折曲部の左右壁３５、３６から各々メインフレーム２２に沿って車両後方へ延ばされ、後端部がクッションフレーム３３に接合される左右の補強フレーム３７、３８とからなる。
　なお、ピボットフレーム２４がメインフレーム２２から分岐する位置の車両後方に、メインフレーム２２の折曲部２６が配置される。ピボットフレーム２４の上端は、メインフレーム２２の折曲部２６より車両前方位置にてメインフレーム２２に接続される。 Next, the structure of the frame will be described.
As shown in FIG. 2, the frame 11 swings a swing arm 23 extending downward from a head pipe 21, a hollow main frame 22 extending from the head pipe 21 in the longitudinal direction of the vehicle, and an intermediate portion of the main frame 22. A car is provided with a pivot frame 24 freely supported, a down frame 25 extending obliquely downward and backward from the lower part of the head pipe 21 to support the front of the engine 12, and a bent portion 26 bent at an intermediate portion of the main frame 22. A cross pipe 27 passed in the width direction, a sub frame 31 passed between the main frame 22 and the pivot frame 24 at the rear position of the cross pipe 27, and a vehicle width direction at the vehicle rear position of the cross pipe 27 It is fixed to the upper surface of the main frame 22, and the upper end of the rear cushion (32 in FIG. 1) is attached Cushion frame 33 and the left and right walls 35 and 36 of the bent portion at the vehicle rear of the cross frame 11 along the main frame 22 to extend to the rear of the vehicle and the rear end is joined to the cushion frame 33 The reinforcing frame 37, 38 of the.
A bending portion 26 of the main frame 22 is disposed at the rear of the vehicle at a position where the pivot frame 24 branches from the main frame 22. The upper end of the pivot frame 24 is connected to the main frame 22 at a position forward of the vehicle from the bending portion 26 of the main frame 22.
　メインフレーム２２から下方に延ばされるピボットフレーム２４は、板材を折り曲げたものであり、車両後方を向いている背面２４Ｈを有する。ピボットフレーム２４は、高さ方向上半分を構成する上半部４５が断面ロ字状を呈し、高さ方向下半分を構成する下半部４６が車両前方に開放する断面コ字状を呈する。下半部４６にピボット軸（図１、符号４７）が通る筒部４８が車幅方向に渡されている。
　ピボットフレーム２４の背面上部２４Ｈａと、メインフレーム２２の折曲部２６より車両後方にてメインフレーム２２との間に、サブフレーム３１が連結される。 The pivot frame 24 extended downward from the main frame 22 is a bent plate, and has a rear surface 24H facing the rear of the vehicle. In the pivot frame 24, the upper half 45 constituting the upper half in the height direction has a cross-sectional square shape, and the lower half 46 constituting the lower half in the height direction has a U-shaped cross section open to the front of the vehicle. In the lower half 46, a cylindrical portion 48 through which a pivot shaft (47 in FIG. 1) passes is passed in the vehicle width direction.
The sub-frame 31 is connected between the rear upper portion 24Ha of the pivot frame 24 and the main frame 22 at the rear of the vehicle than the bent portion 26 of the main frame 22.
　図１に戻って、メインフレーム２２は、折曲部２６で折り曲げられ車両側面視でＶ字形を呈する。スイングアーム２３は、ピボットフレーム２４に設けた筒部４８を中心に揺動自在に支持される。 Returning to FIG. 1, the main frame 22 is bent at the bending portion 26 and has a V-shape in a side view of the vehicle. The swing arm 23 is swingably supported around a cylindrical portion 48 provided on the pivot frame 24.
　次に、フレーム１１に取付けられる部材について説明する。
　ヘッドパイプ２１に前輪１５を支えるフロントフォーク４１が操向可能に設けられ、ヘッドパイプ２１の上方にてフロントフォーク４１に一体化され乗員が操向操作をするハンドル１３が設けられる。フロントフォーク４１の側に、フロントフェンダ４２、ヘッドライト４３及びメータ４４が取付けられる。 Next, members attached to the frame 11 will be described.
A front fork 41 supporting the front wheel 15 is steerably provided on the head pipe 21, and a handle 13 integrated with the front fork 41 above the head pipe 21 for steering operation by an occupant is provided. A front fender 42, a headlight 43 and a meter 44 are attached to the side of the front fork 41.
　ダウンフレーム２５の下部にエンジンハンガ５１が設けられ、このエンジンハンガ５１にエンジンの前部１２ａが取付けられる。また、ピボットフレーム２４にエンジンの後部１２ｂが取付けられている。エンジン１２の上方位置にてメインフレーム２２に、燃料タンク５２が取付けられ、この燃料タンク５２の後端に連続して車両後方へ延びるようにシート１７がメインフレーム２２に取付けられている。メインフレーム２２は、シート１７を支持するシートレール１０７を含む、いわゆるモノバックボーンフレームである。 An engine hanger 51 is provided at the lower part of the down frame 25, and a front portion 12 a of the engine is attached to the engine hanger 51. Also, the rear part 12 b of the engine is attached to the pivot frame 24. A fuel tank 52 is attached to the main frame 22 at a position above the engine 12, and a seat 17 is attached to the main frame 22 so as to extend continuously to the rear of the vehicle at the rear end of the fuel tank 52. The main frame 22 is a so-called mono backbone frame that includes a seat rail 107 that supports the seat 17.
　エンジン１２は、変速機を内蔵するクランクケース６１と、このクランクケース６１から上方に延びるシリンダブロック６２、シリンダヘッド６３からなるシリンダ部６４と、このシリンダ部６４のシリンダヘッド６３を覆うヘッドカバー６５と、シリンダヘッド６３の後壁６３ｂに接続される吸気系７０と、シリンダヘッドの前壁６３ａに接続され車両前方から後方へ延びる排気系８０とからなる。 The engine 12 includes a crankcase 61 incorporating a transmission, a cylinder block 62 extending upward from the crankcase 61, a cylinder portion 64 including a cylinder head 63, and a head cover 65 covering the cylinder head 63 of the cylinder portion 64; It comprises an intake system 70 connected to the rear wall 63b of the cylinder head 63, and an exhaust system 80 connected to the front wall 63a of the cylinder head and extending rearward from the front of the vehicle.
　排気系８０は、シリンダヘッド６３から前方、下方さらには車両後方にこの順で延びている排気管８１と、この排気管８１の車両後端に接続され車両後方に延びている消音器８２とからなる。 The exhaust system 80 includes an exhaust pipe 81 extending forward from the cylinder head 63 and downward and further rearward of the vehicle, and a silencer 82 connected to the rear end of the exhaust pipe 81 and extending rearward of the vehicle. Become.
　吸気系７０は、シート１７の下方に配置されるエアクリーナ７１と、このエアクリーナ７１から車両前方に延ばされるコネクテイングチューブ７２と、このコネクテイングチューブ７２の先に接続されるスロットルボデイ７３と、このスロットルボデイ７３から車両前方に延ばされシリンダヘッドの後壁６３ｂに接続されるインテーク管７４とを有する。 The intake system 70 includes an air cleaner 71 disposed below the seat 17, a connecting tube 72 extended from the air cleaner 71 to the front of the vehicle, a throttle body 73 connected to the tip of the connecting tube 72, and the throttle And an intake pipe 74 extended from the body 73 to the front of the vehicle and connected to the rear wall 63b of the cylinder head.
　ピボットフレーム２４の下部に、車幅方向左右にピボット軸４７が延ばされ、このピボット軸４７から車両後方へスイングアーム２３が延ばされ、このスイングアーム２３の後端に後輪１６が取付けられる。スイングアーム２３の車両後端２３ｂとメインフレームの後部２２ｂの間にリヤクッション３２が渡されることで、フレーム１１に揺動自在に後輪１６が支持される。 At the lower part of the pivot frame 24, the pivot shaft 47 is extended leftward and rightward in the vehicle width direction, the swing arm 23 is extended from the pivot shaft 47 rearward of the vehicle, and the rear wheel 16 is attached to the rear end of the swing arm 23. . The rear cushion 32 is passed between the vehicle rear end 23b of the swing arm 23 and the rear portion 22b of the main frame, so that the rear wheel 16 is supported by the frame 11 so as to freely swing.
　図３に示すように、メインフレーム２２の前部上面に燃料タンク（図１、符号５２）の前端を支持する前タンクステー９１が立設され、クロスパイプ２７に燃料タンク５２の後端部を支持する後タンクステー９２が立設される。 As shown in FIG. 3, a front tank stay 91 supporting the front end of the fuel tank (FIG. 1, reference numeral 52) is erected on the front upper surface of the main frame 22, and the rear end of the fuel tank 52 After support, a tank stay 92 is erected.
　次に、折曲部に渡されるクロスパイプについて説明する。
　図４に示すように、折曲部２６を構成する左右壁３５、３６に、クロスパイプ２７が貫通することができる穴９３、９４が開けられ、これらの穴９３、９４にクロスパイプ２７が貫通され固着される。左右壁３５、３６の間がクロスパイプ２７によって固着されるので、左右壁３５、３６の車幅方向での変位が抑制される。 Next, the cross pipe delivered to the bent portion will be described.
As shown in FIG. 4, holes 93 and 94 through which the cross pipe 27 can pass are made in the left and right walls 35 and 36 constituting the bent portion 26, and the cross pipe 27 passes through these holes 93 and 94. And fixed. Since the left and right walls 35, 36 are fixed by the cross pipe 27, displacement of the left and right walls 35, 36 in the vehicle width direction is suppressed.
　また、クロスパイプ２７が貫通可能な穴９３、９４は、折曲部２６の左右壁３５、３６に設けられているので、クロスパイプ２７を穴９３、９４に差し込むだけで、メインフレーム２２にクロスパイプ２７を位置決めさせることができる。結果、メインフレーム２２にクロスパイプ２７を容易に組付けることができ、組付に係る作業性を高めることができる。 Further, since the holes 93 and 94 through which the cross pipe 27 can pass are provided on the left and right walls 35 and 36 of the bent portion 26, the cross pipe 27 is inserted into the holes 93 and 94 to cross the main frame 22 The pipe 27 can be positioned. As a result, the cross pipe 27 can be easily assembled to the main frame 22, and the workability for assembling can be enhanced.
　折曲部２６の左右壁３５、３６の外幅Ｗ１とし、クロスパイプ２７の車幅方向長さをＷ２とし、車幅方向左右均等にクロスパイプ２７を配置するとき、左右壁３５、３６の最外端からクロスパイプ２７が突設される。すなわち、メインフレーム２２の中間部に位置する折曲部２６の幅Ｗ１とクロスパイプ２７の幅Ｗ２の寸法関係は、Ｗ１＜Ｗ２の関係にあり、メインフレームの左右壁３５、３６から突設されるクロスパイプ２７の部分に、後タンクステー９２が固着可能となる。すなわち、クロスパイプ２７に燃料タンクステーとしての後タンクステー９２が設けられている。 The width W1 of the left and right walls 35 and 36 of the bent portion 26, the length in the vehicle width direction of the cross pipe 27 is W2, and when the cross pipe 27 is equally disposed in the vehicle width direction left and right, A cross pipe 27 projects from the outer end. That is, the dimensional relationship between the width W1 of the bent portion 26 located in the middle portion of the main frame 22 and the width W2 of the cross pipe 27 is in the relationship of W1 <W2, and is projected from the left and right walls 35, 36 of the main frame. The rear tank stay 92 can be fixed to the portion of the cross pipe 27 that is used. That is, the cross pipe 27 is provided with a rear tank stay 92 as a fuel tank stay.
　後タンクステー９２は、折曲部２６の上方にて車幅方向に延びて燃料タンク５２を受けるタンク受け部９５と、このタンク受け部９５の車幅方向両端から下方に延びてクロスパイプ２７に固定される左右脚部９６Ｌ、９６Ｒと、から成る。ここで、タンク受け部９５の外幅Ｗ３とメインフレーム２２の幅Ｗ１とクロスパイプ２７の幅Ｗ２との寸法関係は、Ｗ１＜Ｗ３＜Ｗ２の関係にある。 The rear tank stay 92 extends in the vehicle width direction above the bending portion 26 and receives the fuel tank 52. The rear tank stay 92 extends downward from both ends in the vehicle width direction of the tank receiving portion 95 to the cross pipe 27. The left and right legs 96L and 96R are fixed. Here, the dimensional relationship between the outer width W3 of the tank receiving portion 95, the width W1 of the main frame 22, and the width W2 of the cross pipe 27 is in the relationship of W1 <W3 <W2.
　タンク受け部９５に、燃料タンク（図１２、符号５２）を取付ける左右の孔９７、９７が開けられ、これらの左右の孔９７、９７の位置に合わせてタンク受け部の下面９５ｂに、燃料タンク５２が締結されるようにウエルドナット９８、９８が固着される。 The left and right holes 97, 97 for attaching the fuel tank (FIG. 12, reference numeral 52) are opened in the tank receiving portion 95, and the fuel tank is provided on the lower surface 95b of the tank receiving portion in alignment with the left and right holes 97, 97. Weld nuts 98, 98 are secured such that 52 is tightened.
　燃料タンク５２を受けるタンク受け部９５は、その車幅方向長さＷ３がメインフレーム２２の車幅方向長さＷ１に較べて長い（Ｗ１＜Ｗ３）。メインフレーム２２よりも車幅方向に幅広くクロスパイプ２７を延ばすことで、タンク受け部９５の幅方向長さをかせぐことができ、車幅方向により広い領域で燃料タンク５２を支持させることができる。
　なお、クロスパイプ２７に、吸気系７０に供給される外気が通る空気取入穴１０１が開けられている。 The tank receiving portion 95 for receiving the fuel tank 52 has a vehicle width direction length W3 longer than the vehicle width direction length W1 of the main frame 22 (W1 <W3). By extending the cross pipe 27 wider in the vehicle width direction than the main frame 22, the width direction length of the tank receiving portion 95 can be increased, and the fuel tank 52 can be supported in a wider region in the vehicle width direction.
An air intake hole 101 is formed in the cross pipe 27 through which the outside air supplied to the intake system 70 passes.
　次に、メインフレームにおいて、車両長手方向前端部の断面構造を説明する。
　図５に示すように、メインフレーム２２は、車両長手方向前端にて断面形状が高さ方向に縦長扁平形状を呈する縦長扁平部１０３と、この縦長扁平部１０３の車両後方に位置する折曲部２６で断面形状が円形状を呈する円形状部１０５とを有する。
　車両長手方向位置によってメインフレーム２２の断面形状を変化させることで、各部位に掛かる荷重に対応させたメインフレーム２２とすることができる。 Next, in the main frame, the cross-sectional structure of the front end portion in the vehicle longitudinal direction will be described.
As shown in FIG. 5, the main frame 22 has a longitudinally long flat portion 103 having a longitudinally long flat shape in the height direction at the front end in the longitudinal direction of the vehicle, and a bent portion located behind the longitudinally long flat portion 103 And a circular portion 105 having a circular cross section.
By changing the cross-sectional shape of the main frame 22 depending on the position in the vehicle longitudinal direction, the main frame 22 can be made to correspond to the load applied to each portion.
　次に、メインフレームにおいて、車両長手方向後端部の断面構造を説明する。
　図６に示すように、メインフレーム２２は、折曲部２６で断面形状が円形状を呈する円形状部１０５と、この円形状部１０５の車両後方に位置しシートレール（図１、符号１０７）にて断面形状が円形状から車幅方向に長い横長扁平形状を呈する横長扁平部１０４とを有する。
　車両長手方向位置によってメインフレーム２２の断面形状を変化させることで、各部位に掛かる荷重に対応させたメインフレーム２２とすることができる。 Next, in the main frame, the cross-sectional structure of the rear end portion in the vehicle longitudinal direction will be described.
As shown in FIG. 6, the main frame 22 has a circular portion 105 having a circular cross-sectional shape at the bending portion 26, and a seat rail (FIG. 1, reference numeral 107) positioned behind the circular portion 105 in the vehicle. And a horizontally long flat portion 104 having a horizontally long flat shape which is long in the vehicle width direction from a circular shape.
By changing the cross-sectional shape of the main frame 22 depending on the position in the vehicle longitudinal direction, the main frame 22 can be made to correspond to the load applied to each portion.
　次に、燃料タンクの取付構造について説明する。
　図７に示すように、前タンクステー９１の車幅方向中心に締結ボルト１１１を介して燃料タンク５２の前部が締結され、後タンクステー９２を構成するタンク受け部９５に、締結ボルト１１１、１１１を介して燃料タンク５２の後部が締結される。 Next, the mounting structure of the fuel tank will be described.
As shown in FIG. 7, the front portion of the fuel tank 52 is fastened to the center of the front tank stay 91 in the vehicle width direction via the fastening bolt 111, and the fastening bolt 111, The rear portion of the fuel tank 52 is fastened via 111.
　図１に戻って、燃料タンクを覆うタンクカバーと車体カバーについて説明する。
　燃料タンク５２は、この燃料タンク５２の側方にタンクカバー１１３が配置される。このタンクカバー１１３で燃料タンク５２が覆われている。このタンクカバー１１３の車両後方でタンクカバー１１３の車両後方に連続するようにしてサイドカバー１１４Ｌが配置される。このサイドカバー１１４Ｌで車両中間部の左側方が覆われている。 Returning to FIG. 1, the tank cover and the vehicle body cover that cover the fuel tank will be described.
In the fuel tank 52, a tank cover 113 is disposed on the side of the fuel tank 52. The fuel tank 52 is covered with the tank cover 113. A side cover 114L is disposed so as to be continuous with the vehicle rear of the tank cover 113 behind the vehicle of the tank cover 113. The left side of the vehicle middle portion is covered with the side cover 114L.
　図８～１０では、外気をエンジンに取り入れる吸気系の構造について説明する。
　図８に示すように、吸気系７０は、メインフレームの中空部１２１と、このメインフレームの車両後方に向いて外気が通る空気取入穴１０１をもつクロスパイプ２７と、このクロスパイプ２７から延ばされる筒状の連結管１２３と、この連結管１２３の先に接続されるエアクリーナ７１と、このエアクリーナ７１から車両前方に延ばされエンジン（図１、符号１２）のスロットルボデイ（図１、符号７３）に接続されるコネクテイングチューブ７２とを有する。 8 to 10 illustrate the structure of an intake system for introducing outside air into the engine.
As shown in FIG. 8, the intake system 70 extends from the cross pipe 27 with a hollow portion 121 of the main frame, and a cross pipe 27 having an air intake hole 101 through which outside air passes toward the rear of the main frame. The cylindrical connecting pipe 123, the air cleaner 71 connected to the end of the connecting pipe 123, and the throttle body (FIG. 1, reference numeral 73) of the engine (FIG. 1, reference numeral 12) extended forward from the air cleaner 71. And a connecting tube 72 connected to the
　外気は、メインフレーム２２の車両後端部から入り車両後方から前方へ図矢印ａの如くクロスパイプの中空部１２２を通り、クロスパイプ２７に連結される連結管１２３を通り、エアクリーナ７１に達し、このエアクリーナ７１で取り入れた外気中に混在する埃、塵等の異物を除去し、コネクテイングチューブ７２を通り、このコネクテイングチューブ７２の先に接続されるスロットルボデイ（図１、符号７３）に供給される。 The outside air enters from the rear end of the vehicle of the main frame 22 from the rear of the vehicle to the front through the hollow portion 122 of the cross pipe as shown by arrow a, through the connecting pipe 123 connected to the cross pipe 27, and reaches the air cleaner 71, The air cleaner 71 removes foreign substances such as dust and dirt mixed in the outside air, passes through the connecting tube 72, and is supplied to the throttle body (symbol 73 in FIG. 1) connected to the end of the connecting tube 72. Be done.
　次に、外気が通るクロスパイプ及び周辺部について説明する。
　図９に示すように、メインフレーム２２の折曲部２６を構成する左右壁３５、３６に車幅方向に貫通しているクロスパイプ２７の左端に、クロスパイプ２７の左端を塞ぐ蓋部材１２５が取付けられ、クロスパイプ２７の右端に外気をエアクリーナ（図８、符号７１）へ導く連結管１２３が接続されている。 Next, the cross pipe through which the outside air passes and the periphery will be described.
As shown in FIG. 9, a cover member 125 for closing the left end of the cross pipe 27 is provided at the left end of the cross pipe 27 penetrating in the vehicle width direction to the left and right walls 35, 36 constituting the bent portion 26 of the main frame 22. Attached to the right end of the cross pipe 27 is a connecting pipe 123 for guiding the outside air to the air cleaner (71 in FIG. 8).
　クロスパイプ２７の車幅方向左側方に左のサイドカバー１１４Ｌが配置され、クロスパイプ２７の車幅方向右側方に右のサイドカバー１１４Ｒが配置される。
　クロスパイプ２７の左端は、蓋部材１２５で塞がれているので、空気取入穴１０１を通過した外気は、クロスパイプ２７の右端に接続された連結管１２３へ導かれる。 The left side cover 114L is disposed on the left side of the cross pipe 27 in the vehicle width direction, and the right side cover 114R is disposed on the right side of the cross pipe 27 in the vehicle width direction.
Since the left end of the cross pipe 27 is closed by the lid member 125, the outside air which has passed through the air intake hole 101 is guided to the connecting pipe 123 connected to the right end of the cross pipe 27.
　次に、クロスパイプの車両後方に配置されるエアクリーナの構造等について説明する。
　図１０に示すように、メインフレーム２２にエアクリーナ支持部材１２７が固着され、このエアクリーナ支持部材１２７が下方に延ばされ、このエアクリーナ支持部材１２７に開けた開口１２７ａに嵌るように車両右側からクリーナ左半体１３１が嵌合される。このクリーナ左半体１３１は、締結ねじ１３４、１３４を介してエアクリーナ支持部材１２７に締結されている。クリーナ左半体１３１に、車両右側からエレメント１３３を有するクリーナ右半体１３２が係合され、このクリーナ右半体１３２は、車幅方向右側から右のサイドカバー１１４Ｒで押さえられている。 Next, the structure etc. of the air cleaner disposed at the rear of the cross pipe vehicle will be described.
As shown in FIG. 10, the air cleaner support member 127 is fixed to the main frame 22, and the air cleaner support member 127 is extended downward and fitted into the opening 127a opened in the air cleaner support member 127. The half 131 is fitted. The cleaner left half 131 is fastened to the air cleaner support member 127 via fastening screws 134. The cleaner right half 132 having an element 133 is engaged with the cleaner left half 131 from the right side of the vehicle, and the cleaner right half 132 is held by the right side cover 114R from the right in the vehicle width direction.
　連結管１２３に導かれた外気は、エレメント１３３と右のサイドカバー１１４Ｒとの間に囲まれた空間１３５（ダーテイサイド空間１３５）に導かれ、エレメント１３３を通過し、クリーンサイドであるエレメント１３３とクリーナ右半体１３２とクリーナ左半体１３１との間に囲まれた空間１３６（クリーンサイド空間１３６）に達し、このクリーンサイド空間１３６に接続されるコネクテイングチューブ７２からエンジン（図１、符号１２）側へ送られる。 The outside air guided to the connecting pipe 123 is guided to a space 135 (dirty side space 135) enclosed between the element 133 and the right side cover 114R, passes through the element 133, and is a clean side element 133 and cleaner A space 136 (clean side space 136) surrounded by the right half 132 and the cleaner left half 131 reaches the engine (connecting tube 72) connected to the clean side space 136 (FIG. 1, reference numeral 12) Sent to the side.
　図９～１０を併せて参照して、外気は、メインフレーム２２から空気取入穴１０１を通過してクロスパイプ２７に入力され、このクロスパイプ２７に接続した配管としての連結管１２３を通過してエアクリーナ７１に入力される。
　フレーム１１の構成要素であるクロスパイプ２７に吸気ダクトの一部を兼ねさせたので、エアクリーナ７１に接続される吸気ダクトを短くすることができる。結果、部品点数を減らすことができる。 9 to 10, outside air passes from the main frame 22 through the air intake hole 101 and is input to the cross pipe 27 and passes through the connecting pipe 123 as a pipe connected to the cross pipe 27. Is input to the air cleaner 71.
Since the cross pipe 27 which is a component of the frame 11 doubles as a part of the intake duct, the intake duct connected to the air cleaner 71 can be shortened. As a result, the number of parts can be reduced.
　以上に述べた自動二輪車のフレームの作用を次に述べる。
　図１に戻って、ヘッドパイプ２１に前輪１５がフロントフォーク４１を介して操向自在に支持され、このヘッドパイプ２１から車両後方へ延びるメインフレームの後部２２ｂにてリヤクッション３２及びスイングアーム２３を介して後輪１６が揺動自在に支持されている。このようにメインフレーム２２の前端で前輪１５を支持しメインフレーム２２の後部で後輪１６を支持するため、メインフレーム２２の車両長手方向中間部分に位置する折曲部２６に大きな荷重が掛かる。 The operation of the above-mentioned motorcycle frame will be described next.
Returning to FIG. 1, the front wheel 15 is steerably supported by the head pipe 21 via the front fork 41, and the rear cushion 32 and the swing arm 23 are provided at the rear portion 22b of the main frame extending from the head pipe 21 to the vehicle rear. The rear wheel 16 is pivotally supported via the support. As described above, in order to support the front wheel 15 at the front end of the main frame 22 and support the rear wheel 16 at the rear of the main frame 22, a large load is applied to the bent portion 26 located at the vehicle longitudinal direction middle portion of the main frame 22.
　図４に戻って、中空のメインフレーム２２は、大きな荷重の掛かる折曲部２６の左右壁３５、３６に、クロスパイプ２７が渡されている。左右壁３５、３６の間にクロスパイプ２７を渡すことで、折曲部の左右壁３５、３６の車幅方向での変位を抑制することができる。
　折曲部２６に、車幅方向に渡されるクロスパイプ２７を設けることで、折曲部２６を車幅方向に変形させようとする荷重に対する剛性を高めることができる。 Returning to FIG. 4, in the hollow main frame 22, the cross pipe 27 is passed to the left and right walls 35 and 36 of the bent portion 26 to which a large load is applied. By passing the cross pipe 27 between the left and right walls 35, 36, displacement of the left and right walls 35, 36 in the vehicle width direction of the bent portion can be suppressed.
By providing the bent portion 26 with the cross pipe 27 extending in the vehicle width direction, it is possible to enhance the rigidity against the load for deforming the bent portion 26 in the vehicle width direction.
　図２を併せて参照して、メインフレーム２２は、中空部材とし大きな荷重が掛かる折曲部２６がクロスパイプ２７で補強されている。大きな荷重が掛かるメインフレーム２２の中間部２２ａを車幅方向に補強したので、サブフレーム３１の断面積を小さくすることができる。サブフレーム３１の断面積を小さくすることにより、サブフレーム３１を小さくすることができる。加えて、メインフレーム２２は、１本の中空フレームで構成されているので、メインフレームの後部２２ｂの断面積を小さくすることができ、メインフレーム２２のサイズをコンパクトに抑えることができる。
　結果、メインフレーム２２のサイズをコンパクトに抑えながら、折曲部２６を構成する左右壁３５、３６が車幅方向へ変形することを抑えることができる。 Referring also to FIG. 2, the main frame 22 is a hollow member, and a bent portion 26 to which a large load is applied is reinforced by a cross pipe 27. Since the middle portion 22a of the main frame 22 to which a large load is applied is reinforced in the vehicle width direction, the cross-sectional area of the sub-frame 31 can be reduced. By reducing the cross-sectional area of the sub-frame 31, the sub-frame 31 can be made smaller. In addition, since the main frame 22 is configured of one hollow frame, the cross-sectional area of the rear portion 22 b of the main frame can be reduced, and the size of the main frame 22 can be compact.
As a result, it is possible to suppress the deformation of the left and right walls 35, 36 constituting the bent portion 26 in the vehicle width direction while suppressing the size of the main frame 22 in a compact manner.
　図３を併せて参照して、ピボットフレーム２４の背面上部２４Ｈａと、メインフレーム２２の折曲部２６より車両後方にてメインフレーム２２との間に、サブフレーム３１が連結される。折曲部２６にクロスパイプ２７が設けられているので、ピボットフレーム２４の背面上部２４Ｈａからサブフレーム３１の上端にかけて、メインフレーム２２の剛性を一層高めることができる。 Referring also to FIG. 3, the sub-frame 31 is connected between the rear upper portion 24Ha of the pivot frame 24 and the main frame 22 at the rear of the vehicle than the bent portion 26 of the main frame 22. Since the cross pipe 27 is provided in the bent portion 26, the rigidity of the main frame 22 can be further enhanced from the rear upper portion 24Ha of the pivot frame 24 to the upper end of the sub frame 31.
　さらにまた、メインフレーム２２は、パイプから造られている。メインフレーム２２が１本のパイプから造られていれば、部品点数を減らすことができ、部品点数を減らすことによって、メインフレーム２２の加工工数を減らすことができる。 Furthermore, the main frame 22 is made of a pipe. If the main frame 22 is made of one pipe, the number of parts can be reduced, and by reducing the number of parts, the number of processing steps of the main frame 22 can be reduced.
　尚、本発明は、実施の形態では自動二輪車に適用したが、鞍乗り型３輪車（３輪バギー）や鞍乗り型４輪車（４輪バギー）にも適用可能であり、一般の自動二輪車に適用することは差し支えない。 Although the present invention is applied to a motorcycle in the embodiment, it can also be applied to a saddle-ride type three-wheeled vehicle (three-wheeled buggy) and a saddle-ride type four-wheeled vehicle (four-wheeled buggy). Applying to a two-wheeled vehicle is fine.
　本発明は、自動二輪車のフレームに好適である。 The present invention is suitable for a frame of a motorcycle.
　１０　自動二輪車
　１１　フレーム
　１３　前輪
　１４　後輪
　２１　ヘッドパイプ
　２２　メインフレーム
　２４　ピボットフレーム
　２４Ｈａ　ピボットフレームの背面上部
　２６　折曲部
　２７　クロスパイプ
　３１　サブフレーム
　３５　折曲部の左壁
　３６　折曲部の右壁
　５２　燃料タンク
　９２　燃料タンクステー
　９３　穴
　９４　穴
　９５　タンク受け部
　９６Ｌ　左脚部
　９６Ｒ　右脚部
　１０１　空気取入穴
　１０３　縦長扁平部
　１０４　横長扁平部
　１０５　円形状部 DESCRIPTION OF SYMBOLS 10 Motorcycle 11 frame 13 front wheel 14 rear wheel 21 head pipe 22 main frame 24 pivot frame 24 Ha pivot frame rear upper part 26 bent portion 27 cross pipe 31 sub frame 35 bent portion left wall 36 bent portion right wall 52 Fuel tank 92 Fuel tank stay 93 Hole 94 Hole 95 Tank holder 96 L Left leg 96 R Right leg 101 Air intake hole 103 Vertical flat portion 104 Horizontal flat portion 105 Circular portion

Claims (7)

  1. 　車両長手方向に延び、中間部分において車両側面視でＶ字状に折り曲げられた折曲部を有する中空のメインフレームと、前記折曲部の左右壁に渡されて前記左右壁の車幅方向への変位を抑制するクロスパイプと、前記メインフレームの車両長手方向先端に設けられたヘッドパイプと、前記メインフレームから下方へ延びるピボットフレームと、から成ることを特徴とする自動二輪車用フレーム。 A hollow main frame having a bent portion extending in the longitudinal direction of the vehicle and bent in a V-shape in a vehicle side view at an intermediate portion, and passed to the left and right walls of the bent portion in the vehicle width direction of the left and right walls A motorcycle frame comprising: a cross pipe for suppressing the displacement of the main frame; a head pipe provided at a longitudinal end of the main frame in the vehicle longitudinal direction; and a pivot frame extending downward from the main frame.
  2. 　請求項１に記載の自動二輪車用フレームであって、
    　前記折曲部の左右壁は、前記クロスパイプを貫通する穴を有している。     The motorcycle frame according to claim 1, wherein
    The left and right walls of the bent portion have holes passing through the cross pipe.
  3. 　請求項２に記載の自動二輪車用フレームであって、
    　前記ピボットフレームの上端は、前記メインフレームの折曲部より車両前方にて前記メインフレームに接続される。     The motorcycle frame according to claim 2, wherein
    The upper end of the pivot frame is connected to the main frame in front of the vehicle from the bending portion of the main frame.
  4. 　請求項３に記載の自動二輪車用フレームであって、
    　前記ピボットフレームの背面上部と、前記メインフレームの折曲部より車両後方にて前記メインフレームとの間に、サブフレームが連結される。     The motorcycle frame according to claim 3, wherein
    A sub-frame is connected between the rear upper portion of the pivot frame and the main frame at the rear of the vehicle than the bent portion of the main frame.
  5. 　請求項２に記載の自動二輪車用フレームであって、
    　前記メインフレームは、車両長手方向前端にて断面形状が高さ方向に縦長扁平形状を呈する縦長扁平部と、この縦長扁平部の車両後方に位置する前記折曲部で断面形状が円形状を呈する円形状部と、この円形状部の車両後方に位置しシートレールにて断面形状が円形状から車幅方向に長い横長扁平形状を呈する横長扁平部と、から成る。     The motorcycle frame according to claim 2, wherein
    The main frame exhibits a circular cross-sectional shape at the front end in the longitudinal direction of the vehicle, where the cross-sectional shape exhibits a longitudinally long flat shape in the height direction, and the bent portion located at the rear of the vehicle It comprises a circular portion and a laterally long flat portion which is located in the rear of the vehicle of the circular portion and which has a cross-sectional shape which is long in the vehicle width direction from the circular shape in the seat rail.
  6. 　請求項２に記載の自動二輪車用フレームであって、
    　前記クロスパイプに、前記折曲部の上方を車幅方向に延びて燃料タンクを受けるタンク受け部と、このタンク受け部の両端から下方に延びて前記クロスパイプに固定される左右脚部と、から成る燃料タンクステーが設けられている。     The motorcycle frame according to claim 2, wherein
    A tank receiving portion extending in the vehicle width direction above the bent portion and receiving the fuel tank, the right and left leg portions extended downward from both ends of the tank receiving portion and fixed to the cross pipe; A fuel tank stay is provided.
  7. 　請求項１に記載の自動二輪車用フレームであって、
    　前記クロスパイプは、前記メインフレーム内を流れる空気が取り入れられる空気取入穴を有している。     The motorcycle frame according to claim 1, wherein
    The cross pipe has an air intake hole into which the air flowing in the main frame is taken.
PCT/JP2011/060389 2011-04-28 2011-04-28 Frame for motorcycle WO2012147190A1 (en)

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BR112013026820-4A BR112013026820B1 (en) 2011-04-28 2011-04-28 motorcycle frame
JP2013511844A JP5734417B2 (en) 2011-04-28 2011-04-28 Motorcycle frame
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JP5734417B2 (en) 2015-06-17
JPWO2012147190A1 (en) 2014-07-28
BR112013026820B1 (en) 2020-07-21
CN103492260A (en) 2014-01-01
BR112013026820A2 (en) 2016-12-27

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