WO2006003759A1 - 自動二輪車 - Google Patents
自動二輪車 Download PDFInfo
- Publication number
- WO2006003759A1 WO2006003759A1 PCT/JP2005/009264 JP2005009264W WO2006003759A1 WO 2006003759 A1 WO2006003759 A1 WO 2006003759A1 JP 2005009264 W JP2005009264 W JP 2005009264W WO 2006003759 A1 WO2006003759 A1 WO 2006003759A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rear arm
- motorcycle
- arm bracket
- vehicle body
- bracket
- Prior art date
Links
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
- B62K25/00—Axle suspensions
- B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
- B62K25/28—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay
- B62K25/283—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay for cycles without a pedal crank, e.g. motorcycles
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- 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
Definitions
- the present invention relates to a motorcycle in which a frame member constituting a vehicle body frame is divided and formed into a left half part of a vehicle body and a right half part of the vehicle body and coupled to each other by bolts.
- a conventional body frame of a motorcycle is disclosed in, for example, Japanese Patent Publication No. 6-86231.
- the body frame disclosed in this publication has a frame member formed by forging, and since there is no welded portion, the appearance force is not impaired, and the manufacturing cost can be reduced.
- This body frame is a so-called diamond type, and is made up of a left half of the vehicle body and a right half of the vehicle body formed by the die casting method.
- These two halves include a head pipe portion that holds the head pipe, a main frame that extends rearward and downward from the head pipe portion, a rear arm bracket that extends downward from the rear end portion of the main frame, and a middle portion of the main frame.
- Each has an engine support stage protruding downward. Further, these two halves are assembled by being fastened with bolts while being superposed on each other.
- connection between the left half of the vehicle body and the right half of the vehicle body is achieved by connecting the fastening portions provided on the main frame with bolts and at a portion below the rear arm support portion of the pair of rear arm brackets. This is done by placing a cross pipe horizontally.
- a rear arm support rear arm is supported by the rear arm bracket so as to be swingable in the vertical direction.
- This rear arm is provided with a pair of left and right connecting arms at the end on the front side of the vehicle body. These connecting arms are respectively arranged inside the rear arm bracket body and supported by the rear arm bracket by a pivot shaft extending in the left-right direction. Disclosure of the invention
- the conventional bolt-coupled body frame disclosed in Japanese Examined Patent Publication No. 6-86231 has a problem that its rigidity is lowered as compared with a welded body frame.
- the rigidity is lowered in this way.
- the portion directly connecting the left half of the vehicle body and the right half of the vehicle body is the main frame. This is because they are separated from each other.
- the two halves are also connected to each other via a cross-nove located below the rear arm support!
- the support rigidity at the rear arm support is low because of the connection through the cross pipe. Lower.
- the present invention has been made to solve such a problem, and while reducing the cost while reducing the appearance and cost by using a vehicle body frame coupled with bolts, it is possible to reduce the weight while maintaining the rigidity of the vehicle body frame.
- the object is to provide a motorcycle that has been made possible.
- the motorcycle according to the present invention includes a rear arm bracket that is coupled to the left rear arm bracket and the right rear arm bracket by a fastening member, a left rear arm main body pivotally supported by the left rear arm bracket, A motorcycle equipped with a right rear arm body pivotally supported by a right rear arm bracket, wherein the left rear arm main body is disposed outside the left rear arm bracket in a vehicle width direction, and the right rear arm main body is The right rear arm bracket is disposed on the outer side in the vehicle width direction.
- the portions of the left and right rear arm brackets that support the rear arm main body are arranged in the vehicle width direction. It is possible to increase the rigidity of the joint by bringing them close to each other. Therefore, the rear arm can be firmly supported while adopting a structure in which the pair of left and right rear arm brackets are coupled to each other by the bolts. As a result, the present invention Therefore, by forming the rear arm bracket by forging, it is possible to realize a motorcycle that enables a lightweight body frame while keeping the manufacturing cost low.
- the dustproof property to the bearing portion of the rear arm can be improved.
- the load to shift the mating surface due to the input of the rear arm side force is relieved by the pivot shaft, it is possible to support the rear arm which is difficult to be displaced. .
- the engine can be functioned as a reinforcing cross member by connecting the engine to the pair of left and right frame members. For this reason, according to this invention, the rigidity of a vehicle body frame can be improved.
- the rigidity of the vehicle body frame can be further improved.
- the down tube can function as a cross member interposed between the pair of left and right frame members. For this reason, a highly rigid body frame can be formed in spite of adopting a configuration in which a pair of left and right frame members are coupled by bolts.
- one half of the down tube can be formed by forging so as to have high rigidity, and the other half of the down tube is provided with the lower end of the engine and the other half.
- a bracket for mounting a part can be easily formed. Therefore, according to the present invention, it is possible to improve the rigidity of the body frame and reduce the cost.
- the front half of the down tube can be provided with rigidity, and traveling is stabilized.
- the engine 10 can be firmly supported by the paired portion formed widely in the vehicle width direction in the middle portion of the down tube.
- the exhaust pipe can be formed to be bent with an ideal curvature radius, so that the exhaust resistance of the engine can be reduced.
- FIG. 1 is a side view of a motorcycle according to the present invention.
- FIG. 2 is a plan view of the motorcycle according to the present invention.
- FIG. 3 is a rear view of the motorcycle according to the present invention.
- FIG. 4 is a plan view of a body frame used in the motorcycle according to the present invention.
- FIG. 5 is a side view of the vehicle body frame.
- FIG. 6 is a side view of the main frame member.
- FIG. 7A is a side view showing the front half of the down tube.
- FIG. 7B is a rear view showing the front half of the down tube.
- FIG. 8A is a plan view showing the rear half of the down tube.
- FIG. 8B is a side view showing the rear half of the down tube.
- FIG. 9A is a plan view showing a rear frame.
- FIG. 9B is a side view showing the rear frame.
- FIG. 10 is an enlarged view of the head pipe portion.
- FIG. 11 is a cross-sectional view taken along line XI-XI in FIG.
- FIG. 12 is a cross-sectional view taken along the line XII-XII of the head pipe half in FIG.
- FIG. 13 is a cross-sectional view of the head pipe half portion taken along line XIII-XIII in FIG.
- FIG. 14 is a cross-sectional view of the head pipe half portion taken along line XIV-XIV in FIG.
- FIG. 15 is a sectional view taken along line XV—XV in FIG.
- FIG. 16 is a cross-sectional view of the main frame member taken along line XVI-XIV in FIG.
- FIG. 17 is a cross-sectional view taken along line XVII-XVII in FIG.
- FIG. 18 is a cross-sectional view taken along line XVIII-XVIII in FIG.
- FIG. 19 is a cross-sectional view taken along line XIX—XIX in FIG.
- FIG. 20 is a cross-sectional view taken along line XX—XX in FIG.
- FIG. 21 is a sectional view taken along line XXI—XXI in FIG.
- FIG. 22 is a cross-sectional view taken along the line XXII—XXII in FIG.
- FIG. 23 is a perspective view of a main frame member on the left side of the vehicle body.
- reference numeral 1 denotes a motorcycle according to this embodiment.
- the motorcycle 1 is arranged at a high position near the lower side of the seat 2 so that the muffler cover 3 is conspicuous when viewed from the side.
- 4 indicates the front wheel of the motorcycle 1
- 5 is a front fork
- 6 is a headlight
- 7 is a steering handle
- 8 is a body frame
- 9 is a fuel tank
- 10 is an engine
- 11 is a rear wheel
- 12 is a rear arm.
- 13 indicates an exhaust pipe.
- the engine 10 of the motorcycle 1 is an air-cooled V-type two-cylinder engine, and as shown in FIG. 1, a cylinder 15 on the front side of the vehicle body and a cylinder 16 on the rear side of the vehicle body are viewed from the upper end of the crankcase 14 in a side view. It is configured to extend in a V shape in the odor.
- the exhaust pipe 13 of the engine 10 extends from both cylinders 14, 15 to the right side of the vehicle body.
- the exhaust pipe 13 of the cylinder 15 on the front side of the vehicle body and the exhaust pipe 13 of the cylinder 16 on the rear side of the vehicle body are formed so as to extend downward on the right side of the engine as shown in FIG. It is connected to one collecting pipe 17 (see Fig. 1).
- the collecting pipe 17 extends between a pair of left and right rear arm bodies 18 and 19 (see FIG. 19) in the rear arm 12 and extends upward in a space between a rear arm bracket (described later) and the rear wheel 11.
- a catalytic converter (not shown) is mounted in the middle of the collecting pipe 17.
- the upper end portion of the collecting pipe 17 is formed so as to branch into a bifurcated shape, and is connected to a pair of left and right silencers (not shown) housed in the muffler cover 3.
- the vehicle body frame 8 of the motorcycle 1 is a so-called cradle type that surrounds the engine 10 when viewed from the side of the vehicle body, and is molded into a predetermined shape by forging.
- a cross member 26 laid horizontally between the intermediate portions of the main frame member 21.
- the main frame member 21 constitutes a frame member referred to in the present invention.
- the main frame member 21 and the rear frame 25 are formed into a predetermined shape by die casting using an aluminum alloy as a material.
- the main frame member 21 on the left side of the vehicle body and the main frame member 21 on the right side of the vehicle body include a head pipe half 28 for rotatably supporting the steering shaft 27 (see FIG. 10) of the front fork 5 and the head.
- a main frame 29 extending from the pipe half 28 to the rear of the vehicle body and a rear arm bracket 30 extending downward from the main frame 29 and supporting the rear arm 12 are integrally formed.
- the rear arm bracket 30 also has a force with the left rear arm bracket 30L located on the left side of the vehicle body and the right rear arm bracket 30R located on the right side of the vehicle body. 35 and are connected to each other.
- the head pipe half 28 is formed in a U-shaped cross section that opens toward the center in the left-right direction of the vehicle body. That is, the head pipe half 28 is formed so that the head pipe 31 is formed by joining the left head pipe half and the right head pipe half together.
- the head pipe 31 is provided with bearings 36 and 37 (see FIG. 10) for supporting the steering shaft in the upper end portion and the lower end portion when performing the coupling work. Each is fitted.
- the main frame 29 is formed in a U-shaped cross section that opens toward the center in the left-right direction of the vehicle body, and a reinforcing rib (not shown) is erected inside.
- a reinforcing rib (not shown) is erected inside.
- FIG. 4 the main frame member 29 of the main frame member 21 on the left side of the vehicle body and the main frame 29 of the main frame member 21 on the right side of the vehicle body are separated from each other in the lateral direction of the vehicle body. And are connected to each other by cross members 26 (FIGS. 4 and 16). As shown in FIG. 6, this cross menno 26 is fixed to the main frame 29.
- an engine support bracket 38 that protrudes downward is formed in the lower body of the main frames 29, 29.
- the engine support bracket 38 is connected to the upper end of the engine 10 via a stay 39 (see FIG. 5). That is, the pair of left and right main frames 29 and 29 are connected to each other via the engine 10 and the stay 39.
- the fuel tank 9 is supported and fixed to the main frame 29.
- the down tube 23 includes a front half 41 that extends in the up-down direction in front of the engine 10 and a rear half 42 that extends in the front-rear direction below the engine 10. Yes.
- the down tube 23 according to this embodiment is not formed by a pipe body, it has the same function as a down tube of a general cradle frame. It is called a tube.
- the front half 41 and the rear half 42 of the down tube 23 are coupled to each other by coupling bolts 43.
- the upper end of the front half 41 is coupled to the lower end of the head pipe half 28 by a coupling bolt 22, and the rear end of the rear half 42 is coupled to the lower end of the rear arm bracket 30.
- the vehicle body frame 8 according to this embodiment has a configuration in which a space in which the engine 10 can be removed forward and downward is formed in the main frame member 21 by removing the down tube 23 from the main frame member 21. Yes.
- the motorcycle 1 includes the down tube 23 and the engine 10 together with the main frame. It can be attached to and detached from the material 21.
- the front half 41 of the down tube 23 is formed into a predetermined shape by forging.
- the front half 41 is formed in a shape substantially along the front edge of the engine 10 when viewed from the side of the vehicle body, and is directed downward as shown in FIG. It is formed in a bifurcated shape that opens. More specifically, the front half 41 is formed in a downward Y-shape having one upper portion 41a and two lower portions 41b and 41c when viewed from the rear of the vehicle body. As shown in FIG. 15, the upper end portion of the front half 41 is sandwiched between the main frame member 21 (head pipe half 28) on the left side of the vehicle body and the main frame member 21 (head pipe half 28) on the right side of the vehicle body. It is tightened by two connecting bolts 22 and 22 that pass through them. In other words, the upper end is sandwiched between a pair of left and right main frame members 21 and 21.
- a portion of the front half 41 in the middle in the vertical direction is formed in a U-shaped cross section that opens toward the rear of the vehicle body.
- This U-shaped portion in cross section is denoted by reference numeral 41d in FIG. 7 (b).
- This U-shaped section 41d is formed by a die during forging.
- a hose or a lead wire can be inserted into the U-shaped portion 41d.
- a portion 41e corresponding to the exhaust pipe 13 of the cylinder 15 on the front side of the vehicle body in the upper portion of the front half 41 is formed so that the width in the front-rear direction of the vehicle body is narrower than that of other parts as shown in FIG. Has been.
- a plate-like bracket 45 protruding rearward of the vehicle body is attached to the lower portions 41b and 41c of the front half 41 by mounting bolts 46.
- the front end of the crankcase 14 is connected via a bolt 47 on the 10 side.
- the parts to which the brackets 45 are attached in the lower parts 41b and 41c are formed so as to be solid as shown in FIG.
- the connecting portion between the lower end of the front half 41 and the front end of the rear half 42 is formed by placing both of them together with the rear half 42 superimposed on the front half 41.
- a structure that is fastened by the connecting bolt 43 is adopted.
- the rear half 42 of the down tube 23 is formed in a forked shape that opens toward the front of the vehicle body. More specifically, the rear half 42 is connected to the front half 41.
- a pair of left and right front portions 42a and 42b and a rear portion 42c connected to the rear arm bracket 30 are integrally formed by forging.
- the front parts 42a, 42b and the rear part 42c are formed in a hollow shape, and the inside communicates with each other.
- the cross-sectional shapes of the front portions 42a and 42b are shown in FIG.
- the above-mentioned all 42a, 42b and the lower portions 41b, 41c of the front half 41 constitute a paired portion separated in the vehicle body width direction in the present invention.
- the front portions 42a and 42b have a bracket 48 projecting from the upper surface, and the front lower end portion of the crankcase 14 is connected via the bracket 48 and the bolt 49 on the engine 10 side. It is connected.
- the rear portion 42c is provided with a cushion unit connection bracket 50 and a rear arm bracket connection bracket 51 projecting from the rear end portion.
- the cushion unit connection bracket 50 is formed to be a left-right pair, and the rear arm bracket connection bracket 51 is formed to extend in the front-rear direction and the left-right direction at the center of the left-right direction of the vehicle body.
- the cushion unit connection bracket 50 has a front end portion of a rear cushion unit 52 rotatably connected thereto.
- the rear end portion of the rear cushion unit 52 is connected to the downward projecting portion 54 of the rear arm 12 via a link mechanism 53.
- the rear arm bracket connection bracket 51 is sandwiched between the rear arm bracket 30 on the left side of the vehicle body and the rear arm bracket 30 on the right side of the vehicle body, and is tightened by two coupling bolts 22 and 22 that pass through them. It has been. That is, the rear end portion of the rear half 42 of the down tube 23 is sandwiched between a pair of left and right rear arm brackets 30L and 30R.
- the rear arm bracket 30 is formed in a U-shaped cross section that opens toward the center in the left-right direction of the vehicle body, and includes a plurality of reinforcing ribs therein.
- the rear arm bracket 30 of the main frame member 21 on the left side of the vehicle body and the rear arm bracket 30 of the main frame member 21 on the right side of the vehicle body are near the lower portion of the rear arm support portion 55 (see FIG. 5).
- the rear wall of the rear arm bracket 30 according to this embodiment extends to the center in the left-right direction of the vehicle body, and is aligned with the tip of the rear wall of the other rear arm bracket 30.
- the rear wall defines a space behind the rear arm bracket 30 and a space ahead. It is formed so that.
- the rear arm bracket 30 supports the rear end portion of the crankcase 14 by a support bracket 57 attached to the upper end portion thereof and a projection 58 at the lower end portion.
- the support bracket 57 is sandwiched between a pair of rear arm brackets 30 and fastened by bolts 59 penetrating them.
- the support bracket 57 is attached to the crankcase 14 by bolts 57a.
- the protrusion 58 is fastened to the crankcase 14 by a bolt 60 penetrating the crankcase 14! /. Therefore, the rear arm brackets 30 are connected to each other through the support bracket 57 and the engine 10 at the engine support portion.
- the rear arm 12 supported by the rear arm bracket 30 has a left rear arm body 18 positioned on the left side of the vehicle body at a front end portion and a right side arm body 19 positioned on the right side of the vehicle body.
- the rear wheel 11 is rotatably supported at the rear end of the vehicle body.
- the structure of the rear arm 12 itself is the same as that of the rear arm used in a conventional motorcycle.
- the pair of left and right rear arm bodies 18, 19 of the rear arm 12 is positioned on the outside of the body of the rear arm bracket 30, and is connected to the rear arm bracket via a pivot shaft 61, bearings 62 to 66, etc. penetrating in the left-right direction. It is pivotally supported by 30.
- the pivot shaft 61 crosses the joint surface 30a of the left and right rear arm brackets 30L, 30R.
- the pivot shaft 61 constitutes the pivot shaft of the rear arm in the present invention, and the mating surface 30a is the present invention! /
- the joint surface is configured! Speak.
- FIG. 19 what is indicated by reference numeral 67 provided at both ends of the pivot shaft 61 is a bracket for supporting the driver's footrest 68 (see FIGS. 1 to 3).
- the portion of the rear arm bracket 30 that supports the pivot shaft 61 is formed so that the mating surfaces of the left and right rear arm brackets 30L and 30R surround the entire circumference of the pivot shaft 61, as shown in FIGS. ing.
- rear frame support brackets 71 and 72 project from the rear side of the upper end portion of the rear arm bracket 30. These brackets 71 and 72 are provided at two locations that are spaced apart in the vertical direction, and the main frame member 21 on the left side of the vehicle body and the main frame member 21 on the right side of the vehicle body are provided in four locations in total.
- the rear frame 25 attached to these brackets 71 and 72 is formed in a box shape that opens toward the top and the front of the vehicle body and is long in the front-rear direction of the vehicle body. It is arranged in a state where it is inclined upward and rearward.
- the rear frame 25 is covered with a muffler cover 3 (described later) on both sides, rearward and downward, and with an upper force covered by the seat 2, and is not exposed to the outside of the vehicle body.
- the height of the side wall 73 of the rear frame 25 is formed such that the front end portion attached to the main frame member 21 is the highest.
- the upper end of the side wall 73 is formed in a U-shaped cross section that opens downward.
- the seat 2 is supported by the rear frame 25 while being supported on the upper surface of the upper end portion of the side wall 73.
- the upper end of the rear arm bracket 30 bulges to the side of the vehicle body with the front end of the muffler cover 3 extending rearward along the rear frame 25 extending forward. It is formed to do.
- the shape of the bulging portion 74 is a semiconical shape that protrudes toward the vehicle body side and opens toward the muffler cover 3 side.
- the muffler cover 3 includes an inner cover 81 (see FIG. 3) that covers the rear frame 25 with a downward force, and a pair of left and right outer covers 82 attached to the outer end of the inner cover 81 on the vehicle body. ing. Both side portions of the inner cover 81 and the outer cover 82 are formed into a cylindrical body having a circular cross section by combining them. A silencer (not shown) connected to the rear end of the exhaust pipe 13 is inserted into the cylinder. Further, as shown in FIGS. 1 to 3, an annular cap 83 and a tail pipe 84 projecting rearward from the inside of the cap 83 are attached to the rear end portion of the cylindrical body.
- the inner cover 81 is supported by the rear frame 2, and the outer cover 82 is connected to the inner cover 81, the rear frame 25, and the rear arm with the front end connected to the bulging portion 74 of the rear bracket 30. Supported by a bracket 30.
- the front end of the outer cover 82 is formed so as to cover the rear frame support brackets 71 and 72 from above, from the rear and from the sides.
- the front end of the outer cover 82 is attached to a stay (not shown) that is fastened together with the rear frame 25 to the bracket 71 located on the upper side of both brackets 71 and 72, and a mounting bolt 82a (see FIG. 1). Installed by. That is, the connecting portion between the rear arm bracket 30 and the rear frame 25 is covered from the outside by the outer cover 82 so as not to be exposed to the outside of the vehicle body.
- the motorcycle 1 configured as described above, for example, twists from the left rear arm main body 18 and the right rear arm main body 19 of the rear arm 12 to the rear arm bracket 30L, 3 OR with the front-rear direction of the vehicle body as the center line during cornering. Power is applied to. This torsional force is transmitted from the left rear arm body 18 and right rear arm body 19 of the rear arm 12 to the rear arm brackets 30L and 30R via the bearings 62 to 66 and the pivot shaft 61.
- the left rear arm main body 18 and the right rear arm main body 19 of the rear arm 12 are positioned outside the rear arm bracket 30.
- the motorcycle 1 according to this embodiment is directly connected to the left and right rear arm brackets 30L and 30R as compared to the case where the rear arm bracket is positioned outside the left rear arm body 18 and the right rear arm body 19.
- This joint can be placed close to the rear arm pivot, and the periphery of the pivot can be made highly rigid.
- the left and right rear arm brackets 30L and 30R are directly joined to each other in the vicinity of the pivot shaft 61 of the rear arm 12, so that the support rigidity of the rear arm 12 is improved. Can be made.
- the motorcycle 1 according to this embodiment is formed so that the mating surfaces of the left and right rear arm brackets 30 surround the pivot shaft 61 of the rear arm 12.
- the support rigidity of the rear arm 12 can be improved.
- support rigidity can be further improved by adopting a configuration in which the mating surfaces of the left and right rear arm brackets surround the entire periphery of the pivot shaft of the rear arm.
- the motorcycle 1 according to this embodiment is formed such that the pivot shaft 16 of the rear arm 12 crosses the joint surface between the left and right arm brackets 30. For this reason, the load to shift the mating surface due to the input from the rear arm 12 side is alleviated by the pivot shaft. Therefore, in the motorcycle 1, it is possible to firmly support the rear arm 12 in which the joint surfaces of the rear arm brackets 30 are not easily displaced.
- the motorcycle 1 includes a left rear arm bracket 30 and a right rear arm bracket 30 in which a head pipe half 28 is formed in a body.
- a head pipe can be formed integrally with at least one rear arm bracket 30. That is, a head pipe can be formed integrally with one rear arm bracket 30 to form a frame member, and the other rear arm bracket 30 can be connected to the frame member. Further, in this case, the head pipe can be formed so as to be divided into a left half and a right half, in addition to being integrally formed in a tubular shape.
- the pair of main frame members 21 extending from the head pipe 31 to the rear arm bracket 30 can be formed without welding, the running performance is high and the motorcycle is inexpensive. Can be provided.
- a left and right rear arm bracket 30 and a right rear arm bracket 30 are provided with a pair of left and right frame members (main frame 29) extending to the head pipe 31, respectively. Further, these frame members are formed so as to be spaced apart from each other in the left-right direction of the vehicle body from near the rear of the head pipe portion. Therefore, in the motorcycle 1, the engine 10 can be connected to the pair of left and right main frame members 21 and 21, respectively, so that the engine 10 can function as a reinforcing cross member. Therefore, the rigidity of the body frame 8 can be improved while adopting a configuration in which the pair of left and right main frame members 21 and 21 are coupled to each other by the bolts.
- the down tube 23 is connected to the lower end portion of the head pipe half portion 28 of the main frame member 21 and the lower end portion of the rear arm bracket 30 with coupling bolts 22.
- the lower end of the head pipe half 28 and the lower end of the rear arm bracket 30 are connected via the down tube 23. Therefore, in the motorcycle 1, the pair of left and right main frame members 21, 21 can be reinforced by the down tube 23.
- the both ends of the down tube 23 are sandwiched between the main frame member 21 on the left side of the vehicle body and the main frame member 21 on the right side of the vehicle body. Functions as a cross meno ⁇ interposed between the main frame members 21. For this reason, although the pair of left and right main frame members 21, 21 are coupled by the coupling bolts 22 to form the body frame 8, the body frame 8 can be formed with high rigidity. it can.
- the front half 41 extending in the vertical direction in front of the engine 10 in the down tube 23 is formed by forging, and the rear half extends in the front-rear direction below the engine 10 in the down tube 23.
- the side halves 42 are formed by forging, and both halves are connected by a connecting bolt 43. Therefore, the front half 41 of the down tube 23 can be formed to have high rigidity, and a plurality of parts for attaching the lower cushion portion 52 of the engine 10 to the rear half 42 of the down tube 23.
- the brackets 48 and 50 can be easily formed.
- the front half 41 of the down tube 23 can be formed by forging, and the rear half 42 can be formed by forging.
- this configuration it is desirable to form a large number of brackets in the front half 41.
- the front half 41 of the down tube 23 is formed by forging, the front half 41 can be provided with rigidity, and the running is stable.
- the down tube 23 of the motorcycle 1 includes a pair of parts (41b, 41b, 41), which are spaced apart in the vehicle body width direction while connecting the lower end of the head pipe 31 and the rear lower end of the rear arm bracket 30. 41c, 42a, 42b) are formed and the engine 10 is supported in the paired portion, so that the engine 10 can be firmly supported in the wide paired portion. wear.
- the forged front half 41 of the down tube 23 is formed with a U-shaped pipe guide portion 44 that opens toward the rear of the vehicle body.
- the front half 41 of the down tube 23 can be made lightweight while having high strength. Also, by passing a hose or a lead wire through the U-shaped section of the front half 41, it is possible to prevent these members from being hit by pebbles that are flipped up by the front wheel 4.
- the motorcycle 1 according to this embodiment is formed such that the front-rear width of the portion corresponding to the exhaust pipe 13 of the engine 10 in the upper portion of the down tube 23 is narrower than that of other portions. Therefore, according to the motorcycle 1, the front half 41 of the down tube 23 is formed so as to extend in the vertical direction in front of the engine 10, while the front half 41 force S interferes with the exhaust pipe 13. Can be prevented. Therefore, in the motorcycle 1, the exhaust pipe 13 can be bent so as to have an ideal curvature, and the exhaust resistance of the engine 10 can be reduced.
- the motorcycle 1 since the down tube 23 is formed in a shape along the side surface shape of the front surface of the engine 10, the head pipe 31 can be positioned at a position close to the engine 10. For this reason, the motorcycle 1 has a shorter wheel base than the conventional motorcycle.
- the motorcycle 1 since the front end portion of the muffler cover 3 is connected to the bulging portion 74 of the rear arm bracket 30, the motorcycle 1 uses a part of the body frame 8 to make the muffler cover 3 stand out. Can do.
- the rear arm bracket 30 of the motorcycle 1 according to this embodiment is formed integrally with the head pipe half 28.
- the rear arm bracket is different from other frame members. It can be formed separately. In this case, for example, it is possible to adopt a structure in which the head pipe portion is fixed to the upper front portion of the engine with bolts and the rear arm bracket is fixed to the rear end portion of the engine with bolts.
- the rear arm 12 of the motorcycle 1 according to this embodiment has a configuration in which the rear wheel 11 is supported by a pair of left and right main arms.
- the motorcycle according to the present invention has a rear wheel. This means using a rear arm that is cantilevered by one main arm in the left-right direction.
- the present invention can be used for a motorcycle in which a vehicle body frame is divided into a left half of the vehicle body and a right half of the vehicle body.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05741441A EP1762479B1 (en) | 2004-06-30 | 2005-05-20 | Two-wheeled motor vehicle |
BRPI0512658A BRPI0512658B1 (pt) | 2004-06-30 | 2005-05-20 | motocicleta |
AT05741441T ATE477169T1 (de) | 2004-06-30 | 2005-05-20 | Zweirädriges kraftfahrzeug |
DE602005022867T DE602005022867D1 (de) | 2004-06-30 | 2005-05-20 | Zweirädriges kraftfahrzeug |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-194534 | 2004-06-30 | ||
JP2004194534A JP2006015837A (ja) | 2004-06-30 | 2004-06-30 | 自動二輪車 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006003759A1 true WO2006003759A1 (ja) | 2006-01-12 |
Family
ID=35782572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/009264 WO2006003759A1 (ja) | 2004-06-30 | 2005-05-20 | 自動二輪車 |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1762479B1 (ja) |
JP (1) | JP2006015837A (ja) |
CN (1) | CN1976842A (ja) |
AT (1) | ATE477169T1 (ja) |
BR (1) | BRPI0512658B1 (ja) |
DE (1) | DE602005022867D1 (ja) |
TW (1) | TWI268246B (ja) |
WO (1) | WO2006003759A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11117637B2 (en) * | 2018-07-25 | 2021-09-14 | Harley-Davidson Motor Company Group, LLC | Motorcycle frame |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008143511A (ja) * | 2006-11-15 | 2008-06-26 | Yamaha Motor Co Ltd | 車体フレームおよび車両 |
JP2009090891A (ja) * | 2007-10-10 | 2009-04-30 | Yamaha Motor Co Ltd | 鞍乗型車両 |
WO2010080291A1 (en) * | 2009-01-12 | 2010-07-15 | Polaris Industries Inc. | Motorcycle |
AR084568A1 (es) * | 2010-10-27 | 2013-05-29 | Honda Motor Co Ltd | Motocicleta |
CN106828751B (zh) * | 2017-01-13 | 2022-06-17 | 力帆实业(集团)股份有限公司 | 一种摩托车后叉装配结构 |
JP6695368B2 (ja) * | 2018-02-05 | 2020-05-20 | 本田技研工業株式会社 | 鞍乗り型車両の車体フレーム補強構造 |
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JPH01309801A (ja) * | 1988-06-09 | 1989-12-14 | Yamaha Motor Co Ltd | 小径車輪 |
JPH02246890A (ja) * | 1989-09-20 | 1990-10-02 | Yamaha Motor Co Ltd | 自動二輪車の車体フレーム |
JPH0686231B2 (ja) | 1987-06-19 | 1994-11-02 | 本田技研工業株式会社 | 自動2輪車用車体フレ−ム |
JPH08324476A (ja) * | 1995-05-31 | 1996-12-10 | Suzuki Motor Corp | 自動二輪車のフレーム構造 |
JPH11129966A (ja) * | 1997-10-29 | 1999-05-18 | Yamaha Motor Co Ltd | 自動二輪車用車体フレーム |
JPH11263270A (ja) * | 1998-03-17 | 1999-09-28 | Honda Motor Co Ltd | 車体フレーム構造 |
FR2783230A1 (fr) | 1998-09-11 | 2000-03-17 | Honda Motor Co Ltd | Structure de pivotement d'un bras arriere basculant de motocycle |
JP2001278159A (ja) * | 2000-03-31 | 2001-10-10 | Honda Motor Co Ltd | 自動2輪車用車体フレーム |
WO2003057552A1 (fr) * | 2001-12-28 | 2003-07-17 | Yamaha Hatsudoki Kabushiki Kaisha | Cadre de motocycle |
-
2004
- 2004-06-30 JP JP2004194534A patent/JP2006015837A/ja not_active Withdrawn
-
2005
- 2005-05-20 AT AT05741441T patent/ATE477169T1/de not_active IP Right Cessation
- 2005-05-20 EP EP05741441A patent/EP1762479B1/en active Active
- 2005-05-20 WO PCT/JP2005/009264 patent/WO2006003759A1/ja not_active Application Discontinuation
- 2005-05-20 CN CNA2005800220049A patent/CN1976842A/zh active Pending
- 2005-05-20 BR BRPI0512658A patent/BRPI0512658B1/pt active IP Right Grant
- 2005-05-20 DE DE602005022867T patent/DE602005022867D1/de active Active
- 2005-06-21 TW TW094120687A patent/TWI268246B/zh active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0686231B2 (ja) | 1987-06-19 | 1994-11-02 | 本田技研工業株式会社 | 自動2輪車用車体フレ−ム |
JPH01309801A (ja) * | 1988-06-09 | 1989-12-14 | Yamaha Motor Co Ltd | 小径車輪 |
JPH02246890A (ja) * | 1989-09-20 | 1990-10-02 | Yamaha Motor Co Ltd | 自動二輪車の車体フレーム |
JPH08324476A (ja) * | 1995-05-31 | 1996-12-10 | Suzuki Motor Corp | 自動二輪車のフレーム構造 |
JPH11129966A (ja) * | 1997-10-29 | 1999-05-18 | Yamaha Motor Co Ltd | 自動二輪車用車体フレーム |
JPH11263270A (ja) * | 1998-03-17 | 1999-09-28 | Honda Motor Co Ltd | 車体フレーム構造 |
FR2783230A1 (fr) | 1998-09-11 | 2000-03-17 | Honda Motor Co Ltd | Structure de pivotement d'un bras arriere basculant de motocycle |
JP2001278159A (ja) * | 2000-03-31 | 2001-10-10 | Honda Motor Co Ltd | 自動2輪車用車体フレーム |
WO2003057552A1 (fr) * | 2001-12-28 | 2003-07-17 | Yamaha Hatsudoki Kabushiki Kaisha | Cadre de motocycle |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11117637B2 (en) * | 2018-07-25 | 2021-09-14 | Harley-Davidson Motor Company Group, LLC | Motorcycle frame |
Also Published As
Publication number | Publication date |
---|---|
DE602005022867D1 (de) | 2010-09-23 |
EP1762479B1 (en) | 2010-08-11 |
BRPI0512658A (pt) | 2008-04-01 |
ATE477169T1 (de) | 2010-08-15 |
CN1976842A (zh) | 2007-06-06 |
TWI268246B (en) | 2006-12-11 |
JP2006015837A (ja) | 2006-01-19 |
EP1762479A1 (en) | 2007-03-14 |
EP1762479A4 (en) | 2008-07-09 |
TW200610690A (en) | 2006-04-01 |
BRPI0512658B1 (pt) | 2016-04-12 |
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