WO2019017102A1 - Vehicle body frame structure - Google Patents
Vehicle body frame structure Download PDFInfo
- Publication number
- WO2019017102A1 WO2019017102A1 PCT/JP2018/021711 JP2018021711W WO2019017102A1 WO 2019017102 A1 WO2019017102 A1 WO 2019017102A1 JP 2018021711 W JP2018021711 W JP 2018021711W WO 2019017102 A1 WO2019017102 A1 WO 2019017102A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frame
- main frame
- press
- vehicle body
- pivot
- Prior art date
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Classifications
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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
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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
- 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
- B62K19/08—Cycle frames characterised by material or cross-section of frame members the material being wholly or mainly metallic, e.g. of high elasticity made from sheet
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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
- B62K19/00—Cycle frames
- B62K19/18—Joints between frame members
- B62K19/20—Joints between frame members welded, soldered, or brazed
Definitions
- the present invention relates to a vehicle body frame structure.
- Priority is claimed on Japanese Patent Application No. 201-141151, filed July 20, 2017, the content of which is incorporated herein by reference.
- the stress concentration to the welding part in a frame curve part is mentioned as a subject
- the influence of distortion from a panel bending part in a stress concentration part to a welding part is mentioned as a subject.
- an object of the present invention is to suppress the influence of strain from a panel bending point to a welding point in a vehicle body frame structure adopting a press frame.
- a vehicle body frame structure includes a head pipe, a main frame extending rearward of the head pipe, and a seat rail extending rearward of the main frame, the main frame and the seat rail At least one of which has a curved portion curved as viewed from the first direction, and is formed of a combination of a plurality of press frame bodies, and the plurality of press frame bodies form a closed cross-sectional structure when they are combined with each other
- a joint portion for joining the plurality of press frame bodies to each other is provided on a joint flange extending from the bulged portion of the press frame body to be joined, and the proximal end of the joint flange is provided.
- the distance from the panel bending portion, which raises the bulging shape portion, to the joint portion is relative to the frame general portion excluding the bending portion. Long in the curved portion.
- the curved portion may increase in thickness with respect to the frame general portion in a second direction intersecting the first direction.
- the curved portion may be bent as viewed from a third direction intersecting the first direction and the second direction.
- At least one of the main frame and the seat rail has the curved portion, and a frame around the curved portion You may have a cross-sectional reduction part which reduces a cross-sectional shape.
- the vehicle body frame structure described in the above (1) of the present invention in a frame having a curved portion that curves in a first direction, when a load is applied to the frame, stress is concentrated on the curved portion Cheap.
- deformation easily occurs in the panel bending portion in the bending portion. Therefore, by separating the joint in the curved part of the frame from the panel bend and lengthening the distance from the panel bend to the joint, the influence of the deformation generated in the panel bend on the joint can be suppressed.
- the stress is dispersed at the time of load input to the frame by the cross-sectional reduction portion provided around the curved portion, and the cross-sectional reduction portion is well deformed along with the curved portion. By doing this, the load on the joint of the curved portion can be suppressed.
- FIG. 1 is a left side view of a motorcycle according to an embodiment of the present invention.
- FIG. 6 is a left side view of a vehicle body frame of the motorcycle. It is a top view of the above-mentioned body frame. It is a left side view showing an important section of a seat rail of the above-mentioned body frame.
- FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 4; It is a perspective view including a partial cross section of the above-mentioned seat rail. It is a top view around the above-mentioned seat rail.
- FIG. 7 is a left side view of the vicinity of a connection between a main frame and a pivot frame of the vehicle body frame. It is IX-IX sectional drawing of FIG.
- connection part periphery It is the perspective view which looked at the said connection part periphery from the front side. It is the perspective view which looked at the said connection part periphery from the rear side. It is a top view around the cross member of the above-mentioned seat rail. It is a perspective view of the above-mentioned cross member circumference.
- the present embodiment is applied to a motorcycle 1 which is a straddle-type vehicle.
- the front wheels 2 of the motorcycle 1 are supported by lower end portions of the left and right front forks 3.
- the upper portions of the left and right front forks 3 are supported by the head pipe 21 at the front end of the vehicle body frame 20 via the steering stem 4.
- a steering bar handle 6 is attached to the top of the steering stem 4.
- the rear wheel 7 of the motorcycle 1 is supported by the rear end of the swing arm 8.
- the front end portion of the swing arm 8 is supported by a pivot pipe 25 at the front and rear middle portion of the vehicle body frame 20.
- the “middle” used in the present embodiment includes not only the center between the ends of the target but also the inner range between the ends of the target.
- the rear wheel 7 is connected to an engine 10 which is a prime mover of the motorcycle 1 via, for example, a chain type transmission mechanism 7a disposed on the left rear side of the vehicle body.
- Lower ends of a pair of left and right rear cushions 9 are connected to rear portions of left and right arms of the swing arm 8.
- the engine 10 is mounted on a vehicle body frame 20.
- the engine 10 has a cylinder 12 raised above the front of the crankcase 11.
- An intake passage 13 is connected to the rear of the cylinder 12.
- An exhaust pipe 14 is connected to the front of the cylinder 12.
- the exhaust pipe 14 extends rearward from the front to the rear of the engine 10 and is connected, for example, to an exhaust muffler (not shown) disposed on the right side of the rear of the vehicle body.
- a fuel tank 15 for storing fuel of the engine 10 is disposed above the engine 10.
- a seat 16 on which a driver and a rear passenger sit is disposed behind the fuel tank 15.
- a pair of left and right main steps 17 on which the driver's foot is placed and a pair of left and right pillion steps 18 on which the rear passenger carries a foot are respectively disposed on both sides of the lower portion of the vehicle body.
- the vehicle body frame 20 is configured by integrally joining a plurality of types of steel materials by welding or the like.
- the vehicle body frame 20 is joined to the head pipe 21, a single main frame 22 extending rearward and downward along the vehicle left and right center to the rear of the head pipe 21, and the rear lower end 48 of the main frame 22 and extends vertically.
- a pivot frame 23 is provided.
- the main frame 22 extends rearward from the head pipe 21 in a side view so as to narrow the vertical width toward the rear side.
- the main frame 22 has a front half slightly expanded to the left and right in a plan view, and then extends rearward with a substantially uniform width.
- the main frame 22 is generally curved rearward and downward in a side view.
- the front portion of the main frame 22 is curved relatively gently, while the rear portion of the main frame 22 is curved with an increased curvature.
- the rear portion of the main frame 22 may be referred to as a curved portion 22w.
- the pivot frame 23 is provided continuously below the rear lower end 48 of the main frame 22.
- the upper end portion 49 of the pivot frame 23 constitutes a connection portion 47 together with the rear lower end portion 48 of the main frame 22.
- a rear hanger bracket 24 for supporting the rear of the crankcase 11 of the engine 10 is fixed to the front lower portion of the pivot frame 23.
- a pivot pipe 25 for supporting the front end of the swing arm 8 is fixed to the upper and lower intermediate portions of the pivot frame 23.
- the pivot pipe 25 projects left and right side portions to the left and right outer sides of the pivot frame 23.
- the front lower end portions of the pair of left and right support pipes 26 are joined to the outer peripheral surface of the left and right side portions of the pivot pipe 25.
- the vehicle body frame 20 includes a single down frame 27 extending rearward and downward along the center of the vehicle body from the lower part of the head pipe 21 to the rear.
- the down frame 27 has a steeper inclination than the main frame 22 in a side view and extends rearward and downward.
- a front hanger bracket 28 for supporting the front portion of the crankcase 11 of the engine 10 is integrally formed.
- the upper portion of the down frame 27 is formed to extend in the front and rear width toward the upper side in a side view.
- An upper portion of the down frame 27 constitutes a gusset portion 27 g integrally joined to the lower front side of the main frame 22.
- the front edge of the down frame 27 is formed in a straight line in a side view, while the rear edge of the down frame 27 is formed in a curved shape that is convex forward in a side view.
- the vehicle body frame 20 has a front end portion joined to the rear portion of the main frame 22, a pair of left and right seat rails 30 extending substantially horizontally from the front end portion, and a front end portion joined to the pivot pipe 25 And a pair of left and right support pipes 26 extending upward and rearward and upward and backward.
- the left and right support pipes 26 support the front and rear intermediate portions of the left and right seat rails 30 from below.
- the left and right seat rails 30 extend to the rear end of the vehicle body frame 20.
- Rear end portions of the left and right seat rails 30 are connected to each other via a rear cross member 34.
- Front end portions of the left and right seat rails 30 are connected to each other via a first front cross member (cross member) 31.
- Front and rear intermediate portions of the left and right seat rails 30 are connected to each other via a second front cross member (cross member) 32.
- the front and rear intermediate portions of the left and right seat rails 30 are further connected to each other via a cross pipe 33 at the rear of the second front cross member 32.
- the vehicle body frame 20 has a so-called diamond frame structure that utilizes the engine 10 as a part of the frame structure.
- the engine 10 is mounted on the vehicle body frame 20 so as to be surrounded by the main frame 22, the down frame 27 and the pivot frame 23 in a side view.
- the front of the crankcase 11 of the engine 10 is supported by the front hanger bracket 28, and the rear of the crankcase 11 is supported by the rear hanger bracket 24.
- the down frame 27 and the pivot frame 23 are connected to each other via the crankcase 11 of the engine 10.
- the lower portion of the fuel tank 15 is formed in a bowl shape straddling the main frame 22 in the left and right direction.
- the rear of the fuel tank 15 extends rearward so as to overlap the front of the left and right seat rails 30 in the front-rear direction.
- a rear mounting portion 15a rubber-mounted to the second front cross member 32 is provided at a rear end portion of the fuel tank 15.
- a pair of U-shaped receiving members 15b which are opened forward in a side view are provided in a left-right pair.
- the left and right receiving members 15 b are engaged from behind with cylindrical mount rubbers (not shown) held on the left and right outer side surfaces of the main frame 22, and the front portion of the fuel tank 15 is rubber mounted on the vehicle body frame 20.
- the main frame 22, the pivot frame 23, the down frame 27, and the left and right seat rails 30 are each formed of a combination of press frame bodies formed by pressing a steel plate.
- the main frame 22 is configured by integrally joining a pair of left and right main press frame bodies 42L and 42R.
- the left and right main press frame bodies 42L and 42R are steel plate press-formed parts that are integral with each other.
- Each of left and right main press frame bodies (first press frame bodies) 42L and 42R extends inward in the vehicle width direction from the upper edge of the outer side wall portion 42a facing the outer side in the vehicle width direction (lateral side outer side) and the outer side wall portion 42a.
- Upper wall portion 42b which stands up, upper joint flange 42d which stands up from the tip edge of upper wall portion 42b, lower wall portion 42c which stands up inward in the vehicle width direction from the lower edge of outer wall portion 42a, lower wall portion
- the lower joint flange 42e which stands up downward from the front end edge of 42c is integrally provided.
- the left and right main press frame bodies 42L, 42R contact the upper and lower joining flanges 42d, 42e with each other in the vehicle width direction.
- the upper and lower joining flanges 42d and 42e are integrally joined by a plurality of spot welded parts (joining parts) sp arranged in the flange length direction (front and rear direction, length direction of the main frame 22) orthogonal to the flange erecting direction (vertical direction). It is done.
- an integral main frame 22 having a rectangular closed cross-sectional structure (first closed cross-sectional structure) 22cs by the left and right outer side walls 22a and the upper and lower walls 22b and 22c is configured.
- portions of the left and right main press frame bodies 42L and 42R excluding the upper and lower joining flanges 42d and 42e are referred to as a bulging portion (first bulging portion) 42bs forming the closed cross-sectional structure 22cs of the main frame 22. is there.
- the pivot frame 23 is configured by integrally joining a pair of left and right pivot press frame bodies 43L and 43R.
- the left and right pivot press frame bodies (second press frame bodies) 43L and 43R are steel plate press-formed parts that are integral with each other.
- Each of the left and right pivot press frame bodies 43L and 43R includes an outer side wall 43a facing outward in the vehicle width direction, a front wall 43b rising inward in the vehicle width direction from a front edge of the outer side wall 43a, and an outer side wall 43a. And a rear wall portion 43c which is erected inward in the vehicle width direction from the rear edge.
- the front end of the front wall 43b in one of the left and right pivot press frame bodies 43L and 43R is the front in the other (for example, the right pivot press frame body 43R) of the left and right pivot press frame bodies 43L and 43R. It is displaced in a step-like manner forward by the thickness of the end of the wall 43b. As a result, the tip end of the front wall 43b at the other of the left and right pivot press frame bodies 43L and 43R enters the inside of the cross section at one of the left and right pivot press frame bodies 43L and 43R.
- the tip of the rear wall 43c of one of the left and right pivot press frame bodies 43L and 43R is the other of the left and right pivot press frame bodies 43L and 43R (for example, the right pivot press frame body 43R). Is displaced in a step-like manner rearward by an amount corresponding to the thickness of the tip of the rear wall 43c.
- the end of the rear wall 43c at the other of the left and right pivot press frame bodies 43L and 43R enters the inside of the cross section at one of the left and right pivot press frame bodies 43L and 43R.
- the front end portions of the rear wall portions 43c of the left and right pivot press frame bodies 43L and 43R overlap each other in the thickness direction, and these front end portions are integrally joined by, for example, arc welding or the like.
- an integral pivot frame 23 having a rectangular closed cross-sectional structure (second closed cross-sectional structure) 23cs formed by the left and right outer wall portions 23a and the front and rear wall portions 23b and 23c is configured.
- the portion of the left and right pivot press frame bodies 43L and 43R that forms the closed cross-sectional structure 23cs of the pivot frame 23 may be referred to as a bulging portion (second bulging portion) 43bs.
- a reinforcing member 49g is fixed in the closed cross-sectional structure 23cs of the pivot frame 23.
- the down frame 27 is configured by integrally joining a pair of left and right down press frame bodies.
- the left and right down press frame bodies are respectively integral steel plate press molded parts.
- the left and right down press frame bodies are joined together in the same manner as the left and right pivot press frame bodies 43L and 43R.
- the left and right down press frame bodies are joined together in the same manner as the left and right main press frame bodies 42L and 42R.
- reference numeral 27 h denotes a rear joint flange of the down frame 27.
- each of left and right seat rails 30 integrally joins outer seat press frame body 45O located on the outer side in the vehicle width direction and inner seat press frame body 45I located on the inner side in the vehicle width direction. Is configured.
- the inner and outer sheet press frame bodies (press frame bodies) 45I and 45O are steel plate press-formed parts that are integral with each other.
- Each of the inner and outer seat press frame bodies 45I and 45O includes an outer side wall 45a facing outward in the vehicle width direction, an upper wall 45b rising inward in the vehicle width direction from an upper edge of the outer side wall 45a, and an upper wall 45b.
- the inner and outer seat press frame bodies 45I and 45O contact the upper and lower joining flanges 45d and 45e with each other in the vehicle width direction.
- the upper and lower joint flanges 45d and 45e are integrally formed by a plurality of spot welded portions (joint portions) sp lined up in a flange length direction (front and rear direction, which is also the length direction of the seat rail 30) orthogonal to the flange rising direction (vertical direction). Bonded to.
- an integral seat rail 30 having a rectangular closed cross-sectional structure 30cs of the left and right outer side walls 30a and the upper and lower walls 30b and 30c is formed.
- a portion of the inner and outer sheet press frame bodies 45I and 45O excluding the upper and lower joining flanges 45d and 45e may be referred to as a bulging shape portion 45bs forming the closed cross-sectional structure 30cs of the seat rail 30.
- the left and right support pipes 26 are integrally formed of round steel pipes, respectively. Rear upper end portions of the left and right support pipes 26 are connected to front and rear middle portions of the left and right seat rails 30, respectively.
- the seat rail 30 forms a downward projecting portion 35 having a triangular shape which is downwardly convex in a side view at a front and rear intermediate portion connecting the support pipe 26.
- the rear upper end of the support pipe 26 is inserted into the front slope 35a of the lower projection 35 from the front lower side.
- the lower projecting portion 35 is formed with a cylindrical insertion portion 35c extending along the rear inclined portion 35b.
- an oblong weld hole 35d is formed on the side wall of the insertion portion 35c.
- arc welding is performed along the inner peripheral edge of the welding hole 35d, and the insertion portion 35c and the support pipe 26 are joined.
- the rear inclined portion 35b of the lower protruding portion 35 is substantially parallel to the inclination of the support pipe 26 in a side view and substantially parallel to the upward inclination of the rear portion of the seat rail 30.
- the seat rail 30 has a front and rear intermediate portion forming the lower projecting portion 35 connected to the front half portion 36 linearly extending in the front and rear direction in a side view via the curved portion 37.
- the lower joining flange 45e is between the first straight portion 45e1 along the front half 36 of the seat rail 30, the second straight portion 45e2 along the front inclined portion 35a of the lower protruding portion 35, and both straight portions 45e1 and 45e2.
- a curved portion 45e3 having a circular arc shape in a side view.
- the curved portion 45 e 3 is included in the curved portion 37 of the seat rail 30.
- a widened portion 45e4 is formed in which the flange rising height is increased with respect to the portion excluding the curved portion 45e3.
- the widening portion 45 e 4 has, for example, two spot welded portions sp aligned in the flange length direction. These spot welds sp are separated from the flange proximal end of the lower joining flange 45 e as compared to the spot welds sp of both straight portions 45 e 1 and 45 e 2 excluding the curved portion 45 e 3.
- a panel bending portion 45e5 between the lower joint flange 45e and the lower wall portion 45c in the inner and outer sheet press frame bodies 45I and 45O is formed at the flange base end of the lower joint flange 45e.
- the panel bending portion 45e5 is formed along the flange length direction (the length direction of the seat rail 30).
- the front end edge of the lower joint flange 45e is formed along the flange length direction, but the front end edge of the wide portion 45e4 is formed so as to project more trapezoidally than the front end edges of both linear portions 45e1 and 45e2. It is done.
- the seat rail 30 has a frame widening portion 38 at the same position as the curved portion 37 in the front-rear direction, in which the width in the vehicle width direction is increased with respect to the frame general portion excluding the curved portion 37 ing.
- the rigidity of the curved portion 37 is enhanced by the frame widening portion 38, and the distortion thereof is suppressed.
- the seat rail 30 also has a frame bending portion 39 bent in the vehicle width direction in plan view at the same position as the bending portion 37 in the front-rear direction. At the front-rear intermediate position where the curved portion 37 in the vertical direction and the frame bending portion 39 in the vehicle width direction exist, enhancing the frame rigidity by the frame widening portion 38 has a high effect of suppressing distortion.
- the downward protruding portion 35 of the seat rail 30 is a narrow width portion (cross-sectional reduction portion) in which both side portions in the vehicle width direction of the seat rail 30 are displaced to the inside of the frame in the upper front region of the insertion portion 35c for the support pipe 26 ) 35e is formed.
- the narrowing portion 35 e reduces the cross-sectional shape by reducing the frame width of the seat rail 30 in the upper front region of the insertion portion 35 c.
- This narrowing portion 35 e relieves stress concentration on the curved portion 37 at the time of load input to the seat rail 30. That is, at the time of load input to the seat rail 30, stress and deformation are dispersed in the narrow portion 35e together with the curved portion 37, and the load on the spot welded portion sp of the curved portion 37 is suppressed.
- the correspondence to separate the spot welded part sp from the panel bending part 45e5 and the correspondence to provide the narrow part 35e adjacent to the curved part 37 are not limited to the application to the concave curved part 37, but applied to the convex curved part You may Furthermore, the present invention is not limited to the application to the curved portion 37 of the seat rail 30, but may be applied to the curved portion 22w of the main frame 22.
- the vehicle body frame structure in the present embodiment includes the head pipe 21, the main frame 22 extending to the rear of the head pipe 21, and the seat rail 30 extending to the rear of the main frame 22.
- At least one of the main frame 22 and the seat rail 30 (for example, the seat rail 30) has a curved portion 37 which is curved when viewed from the first direction (vehicle width direction), and a plurality of press frame bodies 45I, 45O It is formed of a combination of The plurality of press frame bodies 45I and 45O have bulging portions 45bs which form a closed cross-sectional structure 30cs when they are combined with each other.
- a joint (spot welded part sp) for joining the plurality of press frame bodies 45I and 45O is provided on a joint flange 45e extending from the bulging shape part 45bs of the press frame bodies 45I and 45O to be joined.
- the distance from the panel bending portion 45e5 for raising the bulging shape portion 45bs at the base end of the joint flange 45e to the joint portion (spot welded portion sp) is the distance from the frame general portion excluding the curved portion 37
- the curved portion 37 is long.
- the seat rail 30 having the curved portion 37 that curves when viewed from the first direction, when a load is applied to the seat rail 30, stress tends to be concentrated on the curved portion 37.
- the panel bending portion 45 e 5 in the bending portion 37 is easily deformed. Therefore, the joint on the curved part 37 of the seat rail 30 is separated from the panel bending part 45e5, and the distance from the panel bending part 45e5 to the jointing part is increased, thereby affecting the joint on the deformation of the panel bending part 45e5. It can be suppressed.
- the curved portion 37 has a thickness greater than that of the frame general portion in a second direction (front-rear direction) intersecting the first direction. According to this configuration, the rigidity of the bending portion 37 can be increased to suppress deformation.
- the bending portion 37 is bent as viewed from a third direction (vertical direction) intersecting the first direction and the second direction. According to this configuration, the rigidity is further required for the bent portion of the frame, so the effect of increasing the thickness of the curved portion 37 is enhanced.
- At least one of the main frame 22 and the seat rail 30 has the curved portion 37 and has a narrow portion 35e around the curved portion 37 for reducing the cross-sectional shape of the frame. ing.
- the stress is dispersed when the load is input to the frame by the narrow width portion 35 e provided around the curved portion 37, and the narrow width portion 35 e is favorably deformed together with the curved portion 37.
- the rear lower end portion 48 of the main frame 22 and the upper end portion 49 of the pivot frame 23 constitute a connecting portion 47 that integrally connects the main frame 22 and the pivot frame 23 to each other.
- the connecting portion 47 is provided outside the left and right outer side walls 48a and 48c of the rear lower end 48 of the main frame 22 in the cross-sectional rectangular shape, and the left and right outer side walls 49a and 49a in the upper end 49 of the pivot frame 23 in the rectangular shape.
- the rear wall 49c is overlapped and joined.
- the connection portion 47 overlaps and welds the front wall portion 49 b of the upper end portion 49 of the pivot frame 23 on the inside of the front wall portion 48 b of the rear lower end portion 48 of the main frame 22.
- the main frame 22 and the pivot frame 23 are integrally joined by, for example, arc welding.
- an oval welding hole (opening) 49 d is formed in the left and right outer side walls 49 a of the upper end 49 of the pivot frame 23.
- arc welding is applied along the inner peripheral edge of the welding hole 49d, and left and right outer side walls 49a of the upper end 49 of the pivot frame 23 and left and right outer side walls 48a of the rear lower end 48 of the main frame 22 overlapping the inner side. And are joined.
- notches 49e for separating the left and right outer side wall portions 49a and the front wall portion 49b are provided.
- the front wall 49b is inserted into the main frame 22 independently of the left and right outer walls 49a by the left and right notches 49e.
- an oval-shaped welding hole (opening) 48d is formed in a left-right pair.
- arc welding is performed along the inner peripheral edge of the left and right welding holes 48d, and the front wall 48b of the rear lower end 48 of the main frame 22 and the front wall 49b of the upper end 49 of the pivot frame 23 overlapping the inside Are joined to each press frame body.
- a bulged portion 48e for avoiding the weld bead bd on the front side of the upper end portion 49 of the pivot frame 23 is formed on the base end side of the lower joint flange 42e of the rear lower end portion 48 of the main frame 22 .
- the lower joint flange 42e which is at the same height as the bulging portion 48e is formed with a widening portion 48f for increasing the flange height. It is easy to provide the spot weld sp by avoiding the bulging portion e by the wide portion f.
- the rear portion of the upper end portion 49 of the pivot frame 23 is cut away so that the upper end height is lower than the front wall portion 49 b and the left and right outer wall portions 49 a.
- the rear wall 49c of the upper end 49 of the pivot frame 23 overlaps the rear wall 48c of the rear lower end 48 of the main frame 22 from behind with a small wrap amount compared to the front wall 49b and the left and right outer walls 49a. .
- the rear wall 49c of the upper end 49 of the pivot frame 23 and the rear wall 48c of the rear lower end 48 of the main frame 22 are joined by, for example, arc welding.
- the rear wall 49 c of the upper end 49 of the pivot frame 23 is formed with a notch 49 f that avoids the upper joint flange 42 d of the main frame 22.
- the left and right outer side walls 49a and the rear wall 49c of the upper end 49 of the pivot frame 23 are overlapped and joined to the outer sides of the left and right outer side walls 48a and the rear wall 48c of the rear lower end 48 of the main frame 22,
- the configuration is not limited to the configuration in which the front wall 49b of the upper end 49 of the upper end 49 overlaps and is joined to the inside of the front wall 48b of the rear lower end 48 of the main frame 22.
- the wall portions overlapping each other may be replaced by the main frame 22 and the pivot frame 23, the inside and outside of the overlapping wall portions may be reversed, or the wall portions may be overlapped in a pattern different from the above.
- the left and right outer side walls 49a and the front wall 49b of the upper end 49 of the pivot frame 23 are independently made independent and the upper end is a cantilevered piece with a free end. It becomes easy to absorb.
- the left and right outer side walls 49a and the front wall 49b of the upper end 49 of the pivot frame 23 are set to overlap by pressing the left and right outer side walls 49a and the front wall 48b of the rear lower end 48 of the main frame 22. It becomes possible to suppress the clearance gap mutually and to join.
- the vehicle body frame structure in the present embodiment includes the head pipe 21, the main frame 22 extending to the rear of the head pipe 21, and the pivot frame 23 extending to the lower side of the main frame 22.
- a connecting portion 47 for connecting the main frame 22 and the pivot frame 23 to each other.
- the connecting portion 47 abuts and joins a part of one of the main frame 22 and the pivot frame 23 from the outside of the other closed sectional structure 22cs, 23cs of the main frame 22 and the pivot frame 23, and
- the remaining part of one of the frame 22 and the pivot frame 23 is abutted and joined from the inside of the other closed cross-sectional structure 22cs, 23cs of the main frame 22 and the pivot frame 23.
- the connecting portion 47 forms an opening (welding holes 48d, 49d) where the inner peripheral edge becomes a joining portion in at least one of the main frame 22 and the pivot frame 23. According to this configuration, the bonding strength can be improved by increasing the length of the bonding portion.
- the main frame 22 is formed of a combination of a plurality of press frame bodies 42L and 42R.
- the plurality of press frame bodies 42L, 42R have bulging portions 42bs that form a closed cross-sectional structure 22cs when they are combined with each other.
- Joints spot welded parts sp
- the plurality of press frame bodies 42L and 42R that form the main frame 22 are joined by the joining flanges 42d and 42e that are bent and extended from the bulging shape portion 42bs, so that the plurality of press frame bodies It is possible to suppress the distortion of the closed cross-sectional structure 22cs due to the connection between the 42L and 42R.
- the pivot frame 23 is formed of a combination of a plurality of press frame bodies 43L and 43R.
- the plurality of press frame bodies 43L, 43R have bulging portions 43bs that form a closed cross-sectional structure 23cs when they are combined with each other.
- the joint portion (spot welded portion sp) for joining the plurality of press frame bodies 43L and 43R together is formed on the inside of one of the bulged portions 43bs of the press frame bodies 43L and 43R to be joined. Are provided at the overlapping portions.
- the connecting portion 47 contacts a part of the pivot frame 23 from the outside in the vehicle width direction of the closed cross-sectional structure 22cs of the main frame 22 and joins the same.
- the remaining portions of the main frame 22 are brought into contact from the inside of the closed cross-sectional structure 22cs of the main frame 22 in the longitudinal direction of the vehicle.
- the first front cross member 31 connecting the front ends of the left and right seat rails 30 to each other forms a stay portion 31a extending forward and abutting on the upper wall 22b of the main frame 22. ing.
- the front end portions of the left and right seat rails 30 and the upper wall portion 22 b of the main frame 22 are integrally joined via the first front cross member 31.
- the first front cross member 31 is provided with a notch 31 b which avoids the upper joint flange 42 d of the main frame 22.
- the front end portions of the left and right seat rails 30 form a front extension 30e1 and a lower extension 30e2 in order to secure a welding length with respect to the left and right outer side walls 22a of the main frame 22.
- the front extension 30e1 and the lower extension 30e2 are provided flush with the upper and lower joining flanges 45d and 45e of the seat rail 30, and the lower ends thereof are integrated with the left and right outer side walls 22a of the main frame 22 by, for example, arc welding. Bonded to.
- the welding strength of the front end of the seat rail 30 is enhanced. As a result, even if a moment that causes the seat rail 30 to swing up and down around its front end acts on the seat rail 30 due to the load input to the seat rail 30, the bonding strength against the moment is secured.
- the second front cross member 32 connecting the front and rear middle portions of the left and right seat rails 30 to each other is provided at the rear of the first front cross member 31 so as to be separated.
- the second front cross member 32 is provided with a tank support portion 32 a that supports the rear end portion of the fuel tank 15.
- the first front cross member 31 and the second front cross member 32 are integrated through a connecting portion 40 disposed between the left and right seat rails 30.
- the connecting portion 40 has a pair of left and right connecting pieces 40 a extending along the upper bonding flanges 45 d of the left and right seat rails 30.
- An opening 40 b is formed between the left and right connecting pieces 40 a.
- the first front cross member 31, the second front cross member 32, and the connecting portion 40 (left and right connecting pieces 40a) are configured as an integral cross member member 40C.
- the left and right connecting pieces 40 a have a gap between the left and right seat rails 30 and are not joined to the left and right seat rails 30. As a result, the welding cost is reduced and the influence of welding distortion on the first and second front cross members 31 and 32 is suppressed.
- the first and second front cross members 31 and 32 are integrated with each other while being separated from each other via the non-joining region R1 with respect to the seat rail 30.
- the structure of the connecting portion 40 is not limited to the structure having the pair of connecting pieces 40a extending along the inner side of the left and right seat rails 30 in the vehicle width direction. There may be various configurations in which the first and second front cross members 31 and 32 are coupled, such as a configuration having a single coupling piece.
- the vehicle body frame structure in the present embodiment includes the head pipe 21, the main frame 22 extending to the rear of the head pipe 21, the plurality of seat rails 30 extending to the rear of the main frame 22, and the plurality of sheets And a plurality of cross members 31 and 32 connected between the rails 30.
- the plurality of cross members 31 and 32 are separated from each other through the non-bonding area R1 with respect to the seat rail 30, and are integrated with each other through the connecting portion 40 disposed in the non-bonding area R1.
- the connecting portion 40 since the plurality of cross members 31 and 32 separated from each other are integrated through the connecting portion 40, the number of parts and the number of assembling steps can be reduced.
- the plurality of cross members 31 and 32 and the connecting portion 40 can be integrally formed as an integral member, and the accuracy of the relative position between the plurality of cross members 31 and 32 can be enhanced.
- the connecting portion 40 has a plurality of connecting pieces 40a along the plurality of seat rails 30, and an opening 40b formed between the plurality of connecting pieces 40a. There is. According to this configuration, weight reduction can be achieved when the plurality of cross members 31 and 32 and the connecting portion 40 are integrated into one member, and reinforcement of the seat rail 30 can be achieved by the connecting piece 40 a.
- the plurality of cross members 31 and 32 are respectively disposed between the front end portions of the plurality of seat rails 30 and between the front and rear intermediate portions. According to this configuration, the front end portions of the plurality of seat rails 30 connected to the main frame 22 are solidified by the cross member 31, and the front and rear intermediate portions in which bending stress is easily generated in the seat rail 30 are reinforced by the cross member 32. it can.
- the cross member 31 provided between the front end portions of the plurality of seat rails 30 has a stay portion 31 a joined to the main frame 22. According to this configuration, the joint strength between the front end portion of the seat rail 30 and the main frame 22 can be enhanced. Further, the seat rail 30 and the main frame 22 can be easily positioned by the stay portion 31a.
- the cross member 32 provided between the front and rear middle portions of the plurality of seat rails 30 has a tank support portion 32 a for supporting the fuel tank 15.
- the functionality can be improved by providing the tank support portion 32 a for the fuel tank 15 at the front and rear intermediate portion of the seat rail 30.
- the saddle-ride type vehicle includes all vehicles on which a driver straddles the vehicle body, and includes motorcycles (motor bike and scooter type vehicles Not only) but also three-wheeled vehicles (including front two-wheeled and two-wheeled vehicles as well as front two-wheeled and rear one-wheeled vehicles) or four-wheeled vehicles.
- motorcycles motor bike and scooter type vehicles Not only
- three-wheeled vehicles including front two-wheeled and two-wheeled vehicles as well as front two-wheeled and rear one-wheeled vehicles
- four-wheeled vehicles four-wheeled vehicles.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Cycles, And Cycles In General (AREA)
- Motorcycle And Bicycle Frame (AREA)
Abstract
Description
本願は、2017年07月20日に、日本に出願された特願2017-141151号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a vehicle body frame structure.
Priority is claimed on Japanese Patent Application No. 201-141151, filed July 20, 2017, the content of which is incorporated herein by reference.
(1)本発明の態様に係る車体フレーム構造は、ヘッドパイプと、前記ヘッドパイプの後方に延びるメインフレームと、前記メインフレームの後方に延びるシートレールと、を備え、前記メインフレームおよび前記シートレールの少なくとも一方は、第一の方向から見て湾曲した湾曲部を有し、かつ複数のプレスフレーム体の組み合わせで形成され、前記複数のプレスフレーム体は、互いに組み合わせた際に閉断面構造を形成する膨出形状部を有し、前記複数のプレスフレーム体同士を接合する接合部は、接合する前記プレスフレーム体の前記膨出形状部から延びる接合フランジに設けられ、前記接合フランジの基端における前記膨出形状部を立ち上げるパネル屈曲部から前記接合部までの距離は、前記湾曲部を除いたフレーム一般部に対し、前記湾曲部において長い。 In order to solve the above-mentioned subject, the mode of the present invention has the following composition.
(1) A vehicle body frame structure according to an aspect of the present invention includes a head pipe, a main frame extending rearward of the head pipe, and a seat rail extending rearward of the main frame, the main frame and the seat rail At least one of which has a curved portion curved as viewed from the first direction, and is formed of a combination of a plurality of press frame bodies, and the plurality of press frame bodies form a closed cross-sectional structure when they are combined with each other And a joint portion for joining the plurality of press frame bodies to each other is provided on a joint flange extending from the bulged portion of the press frame body to be joined, and the proximal end of the joint flange is provided. The distance from the panel bending portion, which raises the bulging shape portion, to the joint portion is relative to the frame general portion excluding the bending portion. Long in the curved portion.
後輪7は、自動二輪車1の原動機であるエンジン10に対し、例えば車体後部左側に配置されたチェーン式の伝動機構7aを介して連結されている。スイングアーム8の左右アームの後部には、左右一対のリアクッション9の下端部が連結されている。 The
The
シリンダ12の後部には、吸気通路13が接続されている。シリンダ12の前部には、排気管14が接続されている。排気管14は、エンジン10の前方から下方を通って後方に向けて延び、例えば車体後部右側に配置された排気マフラー(不図示)に接続されている。 The
An
車体フレーム20は、ヘッドパイプ21と、ヘッドパイプ21の後方へ車体左右中心に沿って後下方へ延びる単一のメインフレーム22と、メインフレーム22の後下端部48に接合されて上下方向に延びるピボットフレーム23と、を備えている。 Referring to FIGS. 2 and 3, the
The
この構成によれば、湾曲部37の剛性を増して変形を抑えることができる。 In the vehicle body frame structure, the
According to this configuration, the rigidity of the bending
この構成によれば、フレームの屈曲箇所にはより剛性が求められることから、湾曲部37の厚さを増すことの効果が高まる。 Further, in the vehicle body frame structure, the bending
According to this configuration, the rigidity is further required for the bent portion of the frame, so the effect of increasing the thickness of the
この構成によれば、湾曲部37の周囲に設けた挟幅部35eにより、フレームへの荷重入力時には応力が分散し、湾曲部37とともに挟幅部35eが良好に変形することで、湾曲部37の接合部に対する負荷を抑えることができる。 In the vehicle body frame structure, at least one of the
According to this configuration, the stress is dispersed when the load is input to the frame by the
この構成によれば、接合箇所の長さを増して接合強度を向上させることができる。 Further, in the vehicle body frame structure, the connecting
According to this configuration, the bonding strength can be improved by increasing the length of the bonding portion.
この構成によれば、メインフレーム22を形成する複数のプレスフレーム体42L,42Rが、膨出形状部42bsから屈曲して延びた接合フランジ42d,42eで接合されることで、複数のプレスフレーム体42L,42R同士の接合による閉断面構造22csのひずみを抑えることができる。 In the vehicle body frame structure, the
According to this configuration, the plurality of
この構成によれば、メインフレーム22を形成する複数のプレスフレーム体43L,43Rが膨出形状部43bs同士の重複部分で接合されることで、膨出形状部43bsから延びる接合フランジを設ける場合に比して、ピボットフレーム23周辺のエンジン10や電装部品等の配置スペースを確保しやすくなる。 Further, in the vehicle body frame structure, the
According to this configuration, when the
この構成によれば、メインフレーム22の前後に接合フランジが起立する構成でも、ピボットフレーム23と接合フランジとの干渉を避けつつ、ピボットフレーム23とメインフレーム22とを容易かつ確実に接続することができる。 Further, in the vehicle body frame structure, the connecting
According to this configuration, even in the configuration in which the joining flanges stand upright on the front and back of the
この構成によれば、複数のクロスメンバ31,32および連結部40を一体の部材とした際の軽量化を図るとともに、連結片40aでシートレール30の補強を図ることができる。 In the vehicle body frame structure, the connecting
According to this configuration, weight reduction can be achieved when the plurality of
この構成によれば、複数のシートレール30におけるメインフレーム22に接続される前端部をクロスメンバ31で固めるとともに、シートレール30における曲げ応力が生じやすい前後中間部をクロスメンバ32で補強することができる。 Further, in the vehicle body frame structure, the plurality of
According to this configuration, the front end portions of the plurality of seat rails 30 connected to the
この構成によれば、シートレール30の前端部のメインフレーム22との接合強度を高めることができる。また、ステー部31aによりシートレール30とメインフレーム22とを容易に位置決めすることができる。 Further, in the vehicle body frame structure, the
According to this configuration, the joint strength between the front end portion of the
この構成によれば、シートレール30の前後中間部に燃料タンク15用のタンク支持部32aを設けることで機能性を向上させることができる。 Further, in the vehicle body frame structure, the
According to this configuration, the functionality can be improved by providing the
そして、上記実施形態における構成は本発明の一例であり、実施形態の構成要素を周知の構成要素に置き換える等、本発明の要旨を逸脱しない範囲で種々の変更が可能である。 The present invention is not limited to the above embodiment. For example, the saddle-ride type vehicle includes all vehicles on which a driver straddles the vehicle body, and includes motorcycles (motor bike and scooter type vehicles Not only) but also three-wheeled vehicles (including front two-wheeled and two-wheeled vehicles as well as front two-wheeled and rear one-wheeled vehicles) or four-wheeled vehicles.
The configuration in the above embodiment is an example of the present invention, and various modifications can be made without departing from the scope of the present invention, such as replacing the components of the embodiment with known components.
15 燃料タンク
20 車体フレーム
21 ヘッドパイプ
22 メインフレーム
23 ピボットフレーム
30 シートレール
31 第一フロントクロスメンバ(クロスメンバ)
31a ステー部
32 第二フロントクロスメンバ(クロスメンバ)
32a タンク支持部
22cs 閉断面構造(第一の閉断面構造)
23cs 閉断面構造(第二の閉断面構造)
30cs 閉断面構造
35e 挟幅部(断面縮小部)
37 湾曲部
40 連結部
40a 連結片
40b 開口部
42bs 膨出形状部(第一の膨出形状部)
43bs 膨出形状部(第二の膨出形状部)
45bs 膨出形状部
42d,42e 接合フランジ
42L,42R 左右メインプレスフレーム体(第一のプレスフレーム体)
43L,43R 左右ピボットプレスフレーム体(第二のプレスフレーム体)
45I,45O 内外シートプレスフレーム体(プレスフレーム体)
45e 下接合フランジ(接合フランジ)
45e5 パネル屈曲部
47 接続部
48d,49d 溶接孔(開口部)
R1 非接合領域
sp スポット溶接部(接合部) 1 Motorcycles (saddle-type vehicles)
32a Tank support 22cs closed cross section (first closed cross section)
23cs closed cross-section (second closed cross-section)
30cs Closed
37
43bs bulging shape (second bulging shape)
45bs bulging
43L, 43R left and right pivot press frame body (second press frame body)
45I, 45O inner and outer sheet press frame body (press frame body)
45e Lower Joint Flange (Joint Flange)
R1 Non-joint area sp Spot weld (joint)
Claims (4)
- ヘッドパイプと、
前記ヘッドパイプの後方に延びるメインフレームと、
前記メインフレームの後方に延びるシートレールと、を備え、
前記メインフレームおよび前記シートレールの少なくとも一方は、第一の方向から見て湾曲した湾曲部を有し、かつ複数のプレスフレーム体の組み合わせで形成され、
前記複数のプレスフレーム体は、互いに組み合わせた際に閉断面構造を形成する膨出形状部を有し、
前記複数のプレスフレーム体同士を接合する接合部は、接合する前記プレスフレーム体の前記膨出形状部から延びる接合フランジに設けられ、
前記接合フランジの基端における前記膨出形状部を立ち上げるパネル屈曲部から前記接合部までの距離は、前記湾曲部を除いたフレーム一般部に対し、前記湾曲部において長い、
車体フレーム構造。 With the head pipe,
A main frame extending to the rear of the head pipe;
A seat rail extending to the rear of the main frame;
At least one of the main frame and the seat rail has a curved portion curved as viewed from the first direction, and is formed of a combination of a plurality of press frame bodies,
The plurality of press frame bodies have bulging portions that form a closed cross-sectional structure when combined with each other,
A joint portion joining the plurality of press frame bodies to each other is provided on a joint flange extending from the bulging shape portion of the press frame body to be joined.
The distance from the panel bending portion, which raises the bulging portion at the proximal end of the joining flange, to the joining portion is longer at the bending portion than the frame general portion excluding the bending portion.
Body frame structure. - 前記湾曲部は、前記第一の方向と交差する第二の方向で、前記フレーム一般部に対して厚さを増している、
請求項1に記載の車体フレーム構造。 The curved portion increases in thickness relative to the frame general portion in a second direction intersecting the first direction.
The vehicle body frame structure according to claim 1. - 前記湾曲部は、前記第一の方向および前記第二の方向と交差する第三の方向から見て屈曲している、
請求項2に記載の車体フレーム構造。 The curved portion is bent as viewed from a third direction intersecting the first direction and the second direction.
The vehicle body frame structure according to claim 2. - 前記メインフレームおよび前記シートレールの少なくとも一方は、前記湾曲部を有するとともに、前記湾曲部の周囲にフレーム断面形状を縮小させる断面縮小部を有している、
請求項1から3の何れか一項に記載の車体フレーム構造。 At least one of the main frame and the seat rail has the curved portion, and has a reduced cross-sectional portion around the curved portion to reduce the cross-sectional shape of the frame.
The vehicle body frame structure according to any one of claims 1 to 3.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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BR112020000404-9A BR112020000404B1 (en) | 2017-07-20 | 2018-06-06 | VEHICLE FRAME STRUCTURE |
JP2019530925A JP6739650B2 (en) | 2017-07-20 | 2018-06-06 | Body frame structure |
CN201880047358.6A CN110914142B (en) | 2017-07-20 | 2018-06-06 | Vehicle body frame structure |
PH12020500097A PH12020500097A1 (en) | 2017-07-20 | 2020-01-14 | Vehicle body frame structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2017-141151 | 2017-07-20 | ||
JP2017141151 | 2017-07-20 |
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PCT/JP2018/021711 WO2019017102A1 (en) | 2017-07-20 | 2018-06-06 | Vehicle body frame structure |
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CN (1) | CN110914142B (en) |
BR (1) | BR112020000404B1 (en) |
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JP2022155104A (en) * | 2021-03-30 | 2022-10-13 | 本田技研工業株式会社 | Vehicle body frame structure of saddle-riding type vehicle |
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CN114030549B (en) * | 2021-11-26 | 2023-04-18 | 重庆宗申创新技术研究院有限公司 | Electric motorcycle structure |
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2018
- 2018-06-06 JP JP2019530925A patent/JP6739650B2/en active Active
- 2018-06-06 CN CN201880047358.6A patent/CN110914142B/en active Active
- 2018-06-06 BR BR112020000404-9A patent/BR112020000404B1/en active IP Right Grant
- 2018-06-06 WO PCT/JP2018/021711 patent/WO2019017102A1/en active Application Filing
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- 2020-01-14 PH PH12020500097A patent/PH12020500097A1/en unknown
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US20100065363A1 (en) * | 2008-09-16 | 2010-03-18 | Goodwin Gary A | Backbone motorcycle frame having a partial cradle which supports a rear portion of a unitized engine and transmission and to which foot peg assemblies are bolted |
JP2011230611A (en) * | 2010-04-26 | 2011-11-17 | Honda Motor Co Ltd | Body frame of motorcycle and method for manufacturing the body frame of motorcycle |
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CN110914142B (en) | 2021-05-14 |
JP6739650B2 (en) | 2020-08-19 |
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BR112020000404A2 (en) | 2020-07-14 |
JPWO2019017102A1 (en) | 2020-03-19 |
BR112020000404B1 (en) | 2023-10-17 |
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