WO2012002319A1 - 車両用ホイール - Google Patents
車両用ホイール Download PDFInfo
- Publication number
- WO2012002319A1 WO2012002319A1 PCT/JP2011/064667 JP2011064667W WO2012002319A1 WO 2012002319 A1 WO2012002319 A1 WO 2012002319A1 JP 2011064667 W JP2011064667 W JP 2011064667W WO 2012002319 A1 WO2012002319 A1 WO 2012002319A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wheel
- disk
- flange
- spoke
- rim
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
- B60B3/10—Disc wheels, i.e. wheels with load-supporting disc body apertured to simulate spoked wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
- B60B3/002—Disc wheels, i.e. wheels with load-supporting disc body characterised by the shape of the disc
- B60B3/007—Disc wheels, i.e. wheels with load-supporting disc body characterised by the shape of the disc in the intermediate section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
- B60B3/04—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
- B60B3/04—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding
- B60B3/041—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding characterised by the attachment of rim to wheel disc
- B60B3/044—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding characterised by the attachment of rim to wheel disc characterised by cross-sectional details of the attachment, e.g. the profile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2310/00—Manufacturing methods
- B60B2310/20—Shaping
- B60B2310/212—Shaping by drawing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2900/00—Purpose of invention
- B60B2900/20—Avoidance of
- B60B2900/212—Damage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2900/00—Purpose of invention
- B60B2900/30—Increase in
- B60B2900/321—Lifetime
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
- B60B3/04—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding
- B60B3/041—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding characterised by the attachment of rim to wheel disc
- B60B3/045—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding characterised by the attachment of rim to wheel disc characterised by the attachment portions
Definitions
- the present invention relates to a vehicle wheel such as an automobile.
- Patent Document 1 discloses that when a punching disk having a spoke integrally formed and having a ring portion on the entire circumference is welded to a rim, and the ring portion is welded to a shoulder portion of the rim, an air shaft (valve hole) of the rim. It is described that a notch is provided in the ring portion so as not to interfere with.
- Patent Document 2 discloses that a disc flange formed in the circumferential direction is formed as a rim by narrowing the spoke width between the decorative holes by squeezing the periphery of the decorative hole of the disc to provide a standing wall to ensure strength. It is described to be welded.
- Patent Document 3 describes that a disk portion is formed from an integral metal sheet, and the disk portion includes a plurality of spoke devices and ring-shaped disk edges that connect the outer ends of the spoke devices. This document describes that the spoke device is formed of two spoke bars (reinforcing ribs) and joins the disk edge to the inner periphery of the rim well (drop portion).
- JP 2004-1704 A JP 2005-119355 A EP 1262333 (Claims 1 and 3) JP 2009-113798 A
- an object of the present invention is to deform a disk flange at the time of molding and crack a corner of a decorative hole when the disk includes a spoke part and a disk flange that connects the tip of the spoke part in the circumferential direction of the disk.
- An object of the present invention is to provide a vehicle wheel in which the durability of the wheel is improved.
- the vehicle wheel according to the present invention includes: (a) a rim having a drop portion; (b) a plurality of spoke portions extending radially outward in the wheel radial direction; and the plurality of spokes positioned at ends on the outer side in the wheel radial direction.
- a disc flange that connects the tip of the outer portion of the wheel in the radial direction of the wheel in the circumferential direction of the disc, and a disc in which a decorative hole having a corner in the circumferential direction of the disc is formed between the spoke portions,
- a wheel for an automobile in which the rim and the disc flange portion are joined, and a portion of the disc flange corresponding to a radially outer end portion of each spoke portion is a disc on the inner side in the wheel axial direction of the disc flange.
- a notch is formed by being cut outward in the axial direction from the inner edge of the flange, and the shortest distance a 1 between the notch and the outer periphery of the decorative hole is: Narrower than the wheel axis of the width a 2 of the disk flange in the disc circumferential position of the decorative holes excluding the corner.
- the portion corresponding to the center line in the width direction of the spoke portion has a central piece extending inward in the wheel axial direction from the outermost edge of the notch portion in the wheel axial direction, and the central piece is It may be fitted with the rim.
- the fitting portion between the center piece and the rim may be welded.
- the present invention it is possible to obtain a vehicle wheel with improved strength, assembly accuracy, and durability of the wheel by suppressing deformation of the disk flange and cracking of the corner of the decoration hole during molding.
- the present invention is a material that can be formed into a disk by forming the flange by folding the outer periphery of the plate-like material by drawing or the like in addition to the steel wheel (for example, , Titanium, aluminum, magnesium, and alloys thereof).
- a casting (forging) disk integrally formed into a thick wall by casting from aluminum, magnesium or the like is not an object.
- the wheel according to the present invention satisfies the official definition of durability.
- the present invention can be applied to an industrial vehicle (agricultural) wheel or an emergency wheel (including an automobile temper wheel) that does not have an official durability strength regulation.
- the official endurance strength is JIS D 4103 “Automotive parts – Disc wheels – Performance and indication”. If the standard changes in the future, the Japanese Industrial Standards JIS (and / or the International Organization for Standardization ISO) ) Is the official durability of the wheel.
- (wheel or disk) radially outer side means the outer peripheral side of the wheel (disk) in the radial direction
- “(wheel or disk) radially inner side” means the wheel (disk).
- “(wheel or disk) axially outside” means a portion that is outside when the wheel is mounted on the vehicle when viewed from the wheel axial direction
- “(wheel or disk) axially inside”. Means the inside (vehicle side) when viewed from the axial direction of the wheel.
- the “disk circumferential direction” is also referred to as “wheel circumferential direction”.
- FIG. 1 is a perspective view of a vehicle wheel (automobile wheel) 10 according to the first embodiment of the present invention as seen from the outside in the wheel axial direction
- FIG. 2 is a front view of the vehicle wheel 10.
- An automobile wheel (hereinafter, also simply referred to as a wheel) 10 includes a steel rim 20 and a disk 30, and the rim 20 and the disk 30 are welded or a joining member such as a rivet (not shown) is used.
- An integrated two-piece wheel is used.
- the disc 30 is manufactured from a plate material, and includes a hub hole 31, a hub mounting portion 32, a spoke portion 33, a decorative hole 34, a disc flange 35, an inclined portion 37 (see FIGS. 3 and 4), and a protrusion 38.
- the disk 30 is employed in a general automobile wheel as shown in FIGS. 16 and 17, and is an annular protrusion that is continuous in the circumferential direction and protrudes in the wheel axial direction on the disk radial direction outer portion of the inclined portion 37. Does not have Z.
- the hub hole 31 is provided in the central portion in the wheel radial direction of the disk 30, and a hub mounting portion 32 is provided around the hub hole 31.
- the hub attachment portion 32 is in a plane orthogonal to or substantially orthogonal to the wheel axial direction and has a flat plate shape or a substantially flat plate shape.
- five hub mounting bolt holes 32a are provided at equal intervals on the circumference concentric with the hub hole 31, the number of the hub mounting bolt holes 32a is not limited. Then, a hub mounting bolt (both not shown) extending from the hub is inserted into the hub mounting bolt hole 32a, and a hub nut (not shown) is screwed into the hub mounting bolt, whereby the disk 30 (wheel 10) is fixed to the hub. Is done.
- the surface on the inner side in the wheel axial direction of the hub mounting portion 32 is the wheel axis more than the inner end in the wheel axial direction of the disc flange 35 (disc flange inner end edge 35a). It is located on the outer side in the direction, and is located on the inner side in the axial direction with respect to the decorative hole end of the disk flange 35 (the disk flange outer end edge 35b on the wheel axis direction L outer side, see FIG. 4).
- the wheel axially inner surface of the hub attachment portion 32 may be inside the disc flange inner end edge 35a or may be outside the disc flange outer end edge 35b.
- the hub mounting bolt holes 32a are located on the center line Cs in the width direction of each spoke portion 33. For example, between the adjacent spoke portions 33 (that is, the disk circumference of the decorative hole 34). may be located in the direction central position on the C D).
- the outer peripheral curved surface connecting portion R is ring-shaped (intermittent in the circumferential direction) 3) (see FIG. 3).
- the disc flange 35 extends along the wheel axial direction, forms a fitting surface with the rim 20 in the axial direction, and secures strength by connecting the spoke portions 33 via the outer peripheral curved surface connecting portion R.
- the end portion of the spoke portion 33 on the inner side in the wheel radial direction is folded back inward in the wheel axial direction to form an inner peripheral curved surface connection portion r, and the inner peripheral curved surface connection portion r is connected to the hub attachment portion via the inclined portion 37. 32.
- the spoke part 33 is extended so as to be orthogonal or substantially orthogonal to the wheel axial direction.
- the outer peripheral curved surface connection portion R has a substantially linear cross section between the first curved surface portion R1 and the second curved surface portion R2, and between the first curved surface portion R1 and the second curved surface portion R2.
- the conical connection part RL may be included, and a single curved connection part may be used as shown in FIGS. Further, as shown in FIG. 15, the first curved surface portion R1 and the second curved surface portion R2 may be included, and the third curved surface portion R3 may be included between the first curved surface portion R1 and the second curved surface portion R2. .
- the third curved surface portion R3 has a curvature opposite to the curvature of the first curved surface portion R1 and the second curved surface portion R2 (that is, the third curved surface portion R3 has a radius when viewed from the outside in the radial direction).
- the third curved surface portion R3 has a curvature in the same direction as the curvatures of the first curved surface portion R1 and the second curved surface portion R2 (that is, the third curved surface portion R3 is radially outward when viewed from the outside in the radial direction). Swell).
- the third curved surface portion R3 may have other shapes.
- the number of spoke portions 33 and the number of hub mounting bolt holes 32a may be different.
- a pair of side wall portions 33b rises outward in the wheel axis direction from both ends in the width direction (disk circumferential direction) of each spoke portion 33, and after the side wall portions 33b rise, An edge portion 33c is formed by extending in the width direction and the radial direction of the spoke portion 33 substantially parallel to the hub attachment portion 32 from the outer end in the wheel axial direction.
- the edge portion 33 c forms the edge of the spoke portion 33.
- interposed into the side wall part 33b forms the bottom wall part 33a.
- the side wall portions 33b of the two adjacent spoke portions 33, 33 are connected in the vicinity of the hub attachment portion 32 to form a projection portion 38. As shown in FIGS.
- the axial dimension of the side wall portion 33b of the spoke portion 33 decreases as it goes radially outward, and the side wall portion 33b in the conical connection portion RL.
- the edge 33c may be absorbed by the bottom wall portion 33a and may form part of a conical surface integrated in the width direction of the spoke portion 33 (circumferential direction of the disk).
- the side wall 33b rises outward in the wheel axial direction, but may rise from the bottom wall 33a inward in the wheel axial direction.
- the bottom wall portion 33 a extends radially outward from the inner peripheral curved surface connection portion r to the outer peripheral curved surface connection portion R and extends outward in the axial direction.
- the bottom wall portion 33a may extend in a direction substantially perpendicular to the wheel axis direction (substantially parallel to the hub mounting portion 32). 3, the bottom wall portion 33a may extend radially outward from the inner peripheral curved surface connection portion r to the outer peripheral curved surface connection portion R and may extend inward in the axial direction.
- the height H (distance in the wheel axial direction) of the side wall portion 33b from the bottom wall portion 33a to the end edge 33c is set to the end portion on the inner side or the outer side in the wheel radial direction of the decorative hole 34. If the maximum is set in the vicinity, the rigidity of the wheel is further improved.
- the maximum value of the height H is preferably 2 to 20 times the plate thickness of the side wall 33b, and most preferably 4 to 10 times.
- the maximum value of the height H is defined within the above range, the rigidity of the wheel 10 can be increased while ensuring the formability of the disk 30. As shown in FIG.
- the narrowest width B1 along the disk circumferential direction of the spoke portion 33 is narrower than the widest width B2 along the disk circumferential direction of the decorative hole 34.
- the following operation occurs depending on the joining position of the disk flange 35 and the rim.
- the disk flange 35 is fitted to the drop portion 24, the force acting from the tire is dispersed, so that the durability is improved.
- the disk flange 35 is fitted to the inner bead sheet part 22 or the outer bead sheet part 26, the diameter of the disk 30 can be increased, so that the design is improved.
- the disc flange 35 is fitted to the intermediate portion 22a, the diameter of the disc 30 can be increased and it is separated from the contact portion with the tire, so that the design is improved and the durability is also improved.
- substantially triangular decorative holes 34 are defined between the two adjacent spoke portions 33, 33, the outer peripheral end of the hub mounting portion 32, and the outer end of the disk flange 35 in the wheel axial direction. Yes. Corners 34x of the decoration holes 34 are formed on both sides of each decoration hole 34 in the circumferential direction of the disk.
- the decoration hole 34 is usually formed for weight reduction and heat dissipation, but is not limited to a triangle, and may be an ellipse, a trapezoid, or other shapes.
- the disk flange 35 is located at the end on the outer side in the wheel radial direction, and connects the tip of each spoke part 33 in the disk circumferential direction. As shown in FIG. 3, the disc flange 35 is fitted to the drop portion 24 of the rim 20, and the inner portion in the wheel axial direction of the fitting portion is welded at the welding position W.
- the rim 20 has an inner flange portion 21, an inner bead seat portion 22, an intermediate portion 22a, an inner sidewall portion 23, a drop portion 24, an outer sidewall portion 25, and an outer bead seat portion 26 in order from the inner side in the wheel axial direction. And an outer flange portion 27.
- the disk flange 35 may be fitted and joined to the inner bead sheet portion 22 or the outer bead sheet portion 26. Further, the disc flange 35 may be fitted and joined to the intermediate portion 22a. When the disc flange 35 is joined to the inner bead sheet portion 22 or the intermediate portion 22a, the orientation of the disc 30 is opposite to that shown in FIG.
- a portion of the disk flange 35 corresponding to the radially outer end (tip) S of each spoke portion 33 is positioned in the wheel axial direction L more than the disk flange inner end edge 35a on the inner side of the disk flange 35 in the wheel axial direction L.
- a notch 36 is formed on the outside. The notch 36 is cut symmetrically with respect to the center line Cs in the width direction of the spoke 33.
- the radially outer end S of the spoke portion 33 of the disc flange 35 is in the vicinity of the outermost peripheral edge of the outer peripheral side curved surface connecting portion R, the bottom wall portion 33a, and the end edge 33c of the spoke portion 33.
- the radially outer end portion S is a connection portion between the spoke portion 33 and the outer side in the wheel axial direction L of the disc flange 35.
- the notch 36 is formed as a convex portion that extends outward in the wheel axial direction L.
- the outermost edge (hereinafter referred to as “notch outermost edge”) 36 b of the notch 36 along the wheel axial direction L is located on the inner side of the disk flange outer end edge 35 b in the wheel axial direction L. positioned.
- This notch outermost edge 36b is a fitting disc flange portion 35p of the disc 30 (see FIGS. 3, 5, 8, 9, 10, and 15).
- the rim 20 in FIG. Part 24 that fits into the outermost diameter part of the disk 30 and penetrates the wheel axis direction L outside to divide the fitting disk flange part 35p in the disk circumferential direction.
- a part of the notch 36 constitutes a fitting portion between the disk 30 and the rim 20.
- a part of the notch 36 (the notch outermost edge 36 b) is formed between the fitting disk flange 35 p and the rim 20.
- a small decorative hole 34s is formed outside the fitting portion in the axial direction L.
- the cutout outermost edge 36b may be positioned outside the disk flange outer end edge 35b in the wheel axial direction L, and may not be divided by penetrating the fitting disk flange portion 35p outward in the wheel axial direction. .
- a portion of the disc flange 35 corresponding to the center line Cs in the width direction of the spoke 33 has a central piece 39 that extends inward in the wheel axial direction L from the notch outermost edge 36b and separates or shallows the notch 36.
- a notch outermost edge 36b is formed on both sides of the central piece 39 in the disk circumferential direction.
- the notch 36 is preferably targeted with respect to the center line Cs in the width direction of the spoke portion 33 for the strength and weight balance of the wheel, but the symmetry may be slightly shifted.
- This central piece 39 is fitted and welded to the drop part 24 (fitting part with the rim 20) of the rim 20.
- An end edge (hereinafter referred to as “center piece end edge”) 39a of the central piece 39 in the wheel axial direction L extends to a position outside the disk flange inner end edge 35a in the axial direction L. Further, the notch outermost edge 36b is located on the inner side in the wheel axis direction L than the disk flange outer edge 35b.
- FIG. 5 shows a side view of the spoke portion 33 of the disk 30 as viewed from the outside in the radial direction.
- the shortest distance a 1 between the notch 36 and the outer periphery of the decorative hole 34 is the disk circumferential position of the decorative hole 34 excluding the corner 34x (as a typical example of “circumferential position” in the example of FIG. is smaller than the width a 2 of the wheel axis L of the disc flange 35 at the adopting center position C D vicinity).
- a neck portion 35n having a narrower width than other portions of the disk flange 35 is formed, and the neck portion 35n is close to a corner portion 34x on the tip side of the spoke portion of the decorative hole 34.
- the disk circumferential direction position of the decoration hole 34 excluding the corner 34x is the innermost disk axis direction (disk radius) of the peripheral edge of the decoration hole 34 excluding the corner 34x on the inner side (disk radial direction outer side). The part located on the outer side in the direction.
- the axial width of the disk flange 35 on the inner periphery in the disk axial direction (the outer side in the disk radial direction) of the decorative hole 34 excluding the corner 34x is substantially constant.
- the position may be adopted.
- a 1 ⁇ a 2 a narrow neck portion 35n is formed. Therefore, when a molding process such as pressing is performed in the wheel axial direction L in the disk flange molding process, the decorative hole 34 is shown in FIG.
- a force acts in the direction of the arrow P2 (force acting on the spoke hole side portion of the decoration hole) and arrow P3 (force acting on the disk flange side portion of the decoration hole) around the corner of the corner 34x near the neck 35n.
- the material can easily flow into (arrow P1 in FIG. 5), and the crack of the corner 34x due to processing can be suppressed. Further, since the neck portion 35n is narrow, it is easy to bend in the width direction (the wheel axis direction L, the surface direction of the disc flange 35). This makes it difficult for the material of the corner portion 34x to be stretched in the circumferential direction of the decorative hole (the surface direction of the disk flange 35), thereby further suppressing cracking of the corner portion 34x due to molding such as pressing. Further, by providing the notch 36, the weight of the disk can be reduced.
- a 1 is equal to or greater than the thickness of the disk flange 35.
- FIG. 6 shows a side view of the spoke portion 33 of the conventional disk 300 not provided with the notch portion 36 as seen from the outside in the radial direction. If not provided notch 36, the width a 3 part the distance between the outer peripheral edge of the vent 34 at the corner portion 34x is shortest, a width a 2 or more. In this case, if a molding process such as pressing is performed in the wheel axis direction L, a force acts in the direction of the arrows P2 and P3 around the decorative hole 34. However, since a 3 ⁇ a 2 , the material is applied to the corner 34x.
- the central edge 39a may be at the same position in the axial direction L as the disk flange inner edge 35a (reference numeral 39a2 in FIG. 7), and the inner side in the axial direction L from the disk flange inner edge 35a. (Reference numeral 39a3 in FIG. 7).
- the center piece end edge 39a is outside the disk flange inner end edge 35a in the axial direction L and along the axial direction L, the fitting disk flange portion 35p (FIGS. 9 and 10). If it is located within the formation range of the reference), it is advantageous in terms of durability, weight reduction and production cost of the wheel.
- FIG. 8 shows a side view of a disk 30x of an automobile wheel according to the second embodiment of the present invention.
- a portion corresponding to the radially outer end S of each spoke portion 33 is outside the disk flange inner end edge 35a on the inner side in the wheel axial direction L of the disk flange 35 in the wheel axial direction L.
- the notch portion 36 x is notched symmetrically with respect to the center line Cs in the width direction of the spoke portion 33.
- Each notch part 36x is formed as one convex curve which goes to the wheel-axis direction L outer side.
- the outermost edge 36xb is located on the inner side in the wheel axial direction L than the disk flange outer end edge 35b. However, the outermost edge 36xb may be located outside the disk flange outer end edge 35b in the wheel axial direction L. Also in the disk 30x, since the a 1 ⁇ a 2, can suppress cracking of the corners of the vent 34 by molding such as a press.
- the disk flange 35 is adjacent to the notch 36 (36x in FIG. 8), and from the center line Cs in the width direction of the spoke 33 to the disk circumferential direction.
- the force is effectively transmitted from the rim to the spoke 33, and the durability of the wheel is increased. Will improve.
- the central piece 39 is provided, if the disk flange 35 and the rim are joined (welded or the like) at the joint portion w2 (central piece end edge 39a) of the central piece 39, the force from the rim to the spoke portion 33 side.
- the automobile wheel of the present invention is characterized by having a spoke part and a large decorative hole, and obtaining an appearance similar to an aluminum wheel, so that the welded part cannot be seen from the outside. It is preferable that welding is performed inside w3 in the wheel axial direction. However, welding outside the wheel axial direction L is not prohibited. Similarly, when viewed from the outside, the disc flange outer end edge 35b adjacent to the decorative hole is located on the inner side of the wheel axial direction outer end (outer side wall portion 25) of the drop portion so that the disc flange does not protrude from the rim. Preferably it is located.
- the disk flange 35 is connected to the fitting disk flange 35p parallel to the fitting portion of the corresponding rim 20, and the connection disk flange 35t connected to the edge of the spoke 33 and the decorative hole 34. It may consist of In this case, the tip of the connection disc flange portion 35t (outside in the wheel axial direction L) is expanded toward the spoke portion 33 and the decoration hole 34, and the spoke portion 33 and the decoration hole 34 are attached to the tip of the connection disc flange portion 35t. Is connected.
- the difference (stepped amount) d1 in the radius between the fitting disc flange portion 35p and the connection disc flange portion 35t is the plate thickness of the disc flange 35 (for example, 5 mm, more generally 2.5 mm to 8 mm). It is desirable to be smaller. More preferably, the stepped amount d1 is 0.5 mm or more and less than the plate thickness of the disk flange 35. When the stepped amount d1 is 0.5 mm or more and less than the plate thickness of the disk flange 35, the rigidity of the disk flange 35 is improved, and as a result, the durability of the wheel 10 is improved.
- the stepped portion facilitates positioning of the rim 20 and the disk 30 in the wheel axis direction when the rim 20 and the disk 30 are assembled. If the stepped amount d1 is smaller than 0.5 mm, the effect of positioning in the wheel axis direction is reduced.
- the stepped amount d1 may be larger than the plate thickness of the disc flange 35, but the moldability of the disc 30 may deteriorate.
- the disc flange 35 is connected to the fitting disc flange portion 35 p parallel to the fitting portion of the corresponding rim 20 and the edge of the spoke portion 33 and the decorative hole 34. It may consist of the connecting disk flange part 35t2.
- the tip of the connection disc flange portion 35t2 (outside in the wheel axial direction L) is reduced in diameter toward the spoke portion 33 and the decoration hole 34, and the spoke portion 33 and the decoration hole 34 are attached to the tip of the connection disc flange portion 35t2. Is connected.
- the radius difference (a stepped amount) d2 between the fitting disc flange portion 35p and the connection disc flange portion 35t2 is smaller than the plate thickness of the disc flange 35. More preferably, the stepped amount d2 is 0.5 mm or more and less than the plate thickness of the disk flange 35. When the stepped amount d2 is 0.5 mm or more and less than the plate thickness of the disk flange 35, the rigidity of the disk flange 35 is improved, and as a result, the durability of the wheel 10 is improved. Further, when the rim 20 and the disk 30 are assembled, the rim 20 and the disk 30 can be easily fitted.
- the stepped amount d2 is smaller than 0.5 mm, the fitting between the rim 20 and the disc 30 is an interference fit, so that the disc 30 is deformed so that the stepped portion is reduced, so that the stepped effect is obtained. Less.
- the stepped amount d2 may be larger than the thickness of the disk flange 35, but the moldability of the disk 30 may deteriorate, and the decorative hole 34 may become smaller, resulting in a decrease in design.
- the total width Wt of the fitting disc flange portion 35p and the connection disc flange portion 35t (or 35t2) is either the narrowest width B1 of the spoke portion 33 or the widest width B2 of the decoration hole 34. Narrower (see FIG. 2). Further, when the connecting disk flange portion 35t (or 35t2) shown in FIGS. 9 and 10 is not provided, the width Wf of the fitting disc flange portion 35p is the narrowest width B1 of the spoke portion 33 and the widest width of the decorative hole 34. Narrower than any of B2.
- FIGS. 13 is a perspective view of the disk 30y in the automobile wheel 10y
- FIG. 14 is a perspective view of the automobile wheel 10y
- FIG. 15 is a partial cross-sectional view of the spoke portion of the disk 30y cut along the wheel radial direction through the wheel axis.
- the vehicle wheel 10y is the same as the vehicle wheel 10 and the disk 30 shown in FIGS. 1 to 5 except that the shape of the notch 136 of the disk 30y is different. The description is omitted.
- the notch outermost edge 136b located at the axially outer end of the notch 136 extends axially outward from the disk flange outer edge 35b, and the side wall 33b and the bottom wall of the spoke 33 are formed. 33a has been reached. For this reason, in each of the spoke portions 33, the radially outer ends of the pair of side wall portions 33b and the radially outer end portions of the pair of end edges 33c are separated in the disk circumferential direction by the notches 136. . Similarly, the disk flange 35 is cut off in the disk circumferential direction by a notch 136.
- the notch outermost edge 136b is positioned outside the disk flange outer end edge 35b in the wheel axial direction L, even if the disk 30 is fitted to the rim 20 and assembled as shown in FIG. A part of the notch 136 (the notch outermost edge 136b) is exposed to the outside in the axial direction L from the fitting part between the fitting disc flange 35p and the rim 20, and the small decoration hole 134s is formed.
- the present invention is not limited to the above embodiment.
- the shapes of the spoke portions and the decoration holes are not limited, and there is no limitation as long as the number of these is plural.
- the shape and number of the side wall portions of the spoke portions are not limited, and the protruding direction of the side wall portions is not limited.
- a hole for weight reduction may be opened in the spoke part.
- FIG. 4 the distortion at the time of the molding process by pressing the disk 30 having the notch 36 was investigated in the vicinity of the corner of the decorative hole 34.
- the obtained results are shown in FIGS.
- FIG. 11 when the notch 36 is provided in the disk 30, the maximum value of the distortion d near the corner of the decorative hole 34 is about 50%.
- FIG. 12 when the disc 300 is not provided with a notch, the maximum value of the strain d near the corner of the decorative hole 34 reaches about 90%, and it is found that the corner is easily cracked. did.
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Abstract
Description
このうち、特許文献1には、スポークを一体形成し全周にリング部を有する打ち抜きディスクをリムに溶接し、上記リング部をリムのショルダ部に溶接する際、リムの空気軸(バルブ穴)と干渉しないようリング部に切り欠きを設けることが記載されている。
又、特許文献2には、ディスクの飾り穴の周縁をしごいて立壁を設けて強度を確保することで飾り穴の間のスポーク幅を細くし、かつ周方向に形成したディスクフランジをリムと溶接することが記載されている。
特許文献3には、一体の金属シートからディスク部を形成し、ディスク部が複数のスポーク装置と各スポーク装置の外端を連結するリング状のディスクエッジを備えたことが記載されている。そして、この文献には、スポーク装置は2本のスポークバー(補強リブ)から形成され、ディスクエッジをリムウェル(ドロップ部)の内周に接合することが記載されている。
そこで、スポーク部の延長部分に曲面接続部を形成し、曲面接続部を介してディスクフランジをスポーク部に接続したホイールが開発されている(特許文献4参照)。このようにすると、曲面接続部では材料のホイール半径方向の幅が広く、強度も高いため、折り返し加工によって端縁がうねることが少ないとされている。
従って、本発明の目的は、スポーク部とスポーク部の先端をディスク周方向に連結するディスクフランジとをディスクが備えている場合に、成型加工時のディスクフランジの変形および飾り穴の隅部の割れを抑制するとともにホイールの耐久性を向上させた車両用ホイールを提供することにある。
このような構成とすると、a1<a2となる部分が狭幅の頸部に形成されるので、プレス等の成型加工をホイール軸方向に行うと、飾り穴の周辺に所定の向きに力が働くとともに、頸部近傍の飾り穴隅部に材料が流れ込み易くなり、加工による隅部の割れを抑制できる。又、頸部は狭幅であるために幅方向に曲げやすくなることにより、飾り穴隅部の材料が飾り穴の周方向に伸ばされ難くなるため、加工による隅部の割れをさらに抑制できる。
このような構成とすると、中央片の接合部でディスクフランジとリムを接合(溶接等)した場合に、リムからスポーク部側への力の伝達が有効に行われ、ホイールの耐久性が向上する。
一方、本発明ではアルミニウム、マグネシウム等から鋳造によって厚肉に一体成形された鋳造(鍛造)ディスクを対象としない。
又、本発明によるホイールは、公式な耐久強度の規定を満たすものであることが好ましい。但し、公式な耐久強度の規定を有しない産業車両用(農耕用)ホイールや応急使用ホイール(自動車用テンパーホイールを含む)等であっても本発明を適用することができる。
ここで、公式な耐久強度はJIS D 4103「自動車部品―ディスクホイール―性能及び表示」 であるが、将来、規格が変わった場合は、その時点で日本工業規格JIS(及び/又は国際標準化機構ISO)が定めるホイールの公式な耐久強度をいう。
自動車用ホイール(以下、単に、ホイールともいう)10は、スチール製のリム20とディスク30とを有し、リム20とディスク30とを溶接または図示略のリベットなどの接合部材を用いるなどして一体化したツーピースホイールである。
なお、図3に示すように、ホイール軸方向Lにおいて、ハブ取付け部32のホイール軸方向内側の面は、ディスクフランジ35のホイール軸方向内側端部(ディスクフランジ内側端縁35a)よりもホイール軸方向外側に位置し、ディスクフランジ35の飾り穴端部(ホイール軸方向L外側のディスクフランジ外側端縁35b、図4参照)よりも軸方向内側に位置する。ただし、ハブ取り付け部32のホイール軸方向内側の面がディスクフランジ内側端縁35aより内側にあってもよく、ディスクフランジ外側端縁35bより外側にあってもよい。又、図2の例では、ハブ取付けボルト穴32aは、各スポーク部33の幅方向中心線Cs上に位置しているが、例えば隣接するスポーク部33の間(つまり、飾り穴34のディスク周方向中央位置CD上)に位置してもよい。
外周側曲面接続部Rは、図3に示すように第1曲面部R1と第2曲面部R2、および第1曲面部R1と第2曲面部R2との間に断面がほぼ直線状に傾斜する円錐状接続部RLとを、含んでいてもよく、また、図9、図10に示すように単一の曲面接続部でもよい。さらに、図15に示すように第1曲面部R1と第2曲面部R2を有すると共に、第1曲面部R1と第2曲面部R2との間に、第3曲面部R3を含んでいても良い。ここで、図15に示すように、第3曲面部R3が第1局面部R1及び第2曲面部R2の曲率と逆向きの曲率(つまり、半径方向外側から見て第3曲面部R3は半径方向内側に凹む)でもよく、第3曲面部R3が第1局面部R1及び第2曲面部R2の曲率と同じ向きの曲率(つまり、半径方向外側から見て第3曲面部R3は半径方向外側に膨らむ)でも良い。また、第3曲面部R3がその他の形状であっても良い。
なお、スポーク部33の数とハブ取付けボルト穴32aの数は異なってもよい。
また、図3、図4に示すように、第1曲面部R1において、スポーク部33の側壁部33bの軸方向寸法が半径方向外側にいくにつれて減少し、さらに円錐状接続部RLにおいて側壁部33bが消滅すると共に端縁33cが底壁部33aに吸収され、スポーク部33の幅方向(ディスクの周方向)に一体となる円錐面の一部をなしても良い。
なお、この例では、側壁部33bがホイール軸方向外側に立ち上がっているが、底壁部33aからホイール軸方向内側に立ち上がっていてもよい。
図3に示すように、底壁部33aは、内周側曲面接続部rから外周側曲面接続部Rにかけて半径方向外側に向かうとともに、軸方向外側に延びている。又、図9および図10に示すように、底壁部33aがほぼホイール軸方向と垂直の方向に(ハブ取付け部32とほぼ平行に)延びていても良い。又、図3と逆に、底壁部33aが内周側曲面接続部rから外周側曲面接続部Rにかけて半径方向外側に向かうとともに、軸方向内側に延びていても良い。
なお、図2に示すように、スポーク部33のディスク周方向に沿った最も狭い幅B1は、飾り穴34のディスク周方向に沿った最も広い幅B2よりも狭い。
又、ディスクフランジ35とリムとの接合位置に応じて、以下のような作用が生じる。ディスクフランジ35が、ドロップ部24と嵌合されているとタイヤから働く力が分散されるため耐久性が向上する。一方、ディスクフランジ35が、内側ビードシート部22または外側ビードシート部26と嵌合されているとディスク30の直径が大きくできるので意匠性が向上する。ディスクフランジ35が、中間部22aと嵌合されていると、ディスク30の直径が大きくでき、タイヤとの接触部からも離れているので、意匠性が向上するとともに耐久性も向上する。
ここで、リム20は、ホイール軸方向内側から順に、内側フランジ部21、内側ビードシート部22、中間部22a、内側サイドウォール部23、ドロップ部24、外側サイドウォール部25、外側ビードシート部26および外側フランジ部27を備える。なお、ディスクフランジ35が内側ビードシート部22または外側ビードシート部26に嵌合され接合されてもよい。また、ディスクフランジ35が中間部22aに嵌合されて接合されてもよい。なお、内側ビードシート部22又は中間部22aにディスクフランジ35が接合される場合は、ディスク30の向きが、図3に示す場合と逆の向きとなる。
ここで、ディスクフランジ35のうちスポーク部33の半径方向外側端部Sは、スポーク部33の外周側曲面接続部R、底壁部33a、及び端縁33cの最外周縁近傍となっている。半径方向外側端部Sは、スポーク部33とディスクフランジ35のホイール軸方向L外側との接続部分である。
なお、ディスクフランジ35のディスクフランジ内側端縁35aは、ディスク周方向に沿った飾り穴34のディスク周方向中央位置CD近傍および遇部34xを除いた飾り穴34の部分におけるディスクフランジ35のホイール軸方向Lの内側縁部である。同様に、ディスクフランジ35のホイール軸方向L外側のディスクフランジ外側端縁35bは、飾り穴34のディスク周方向中央位置CD近傍および遇部34xを除いた飾り穴34の部分におけるディスクフランジ35のホイール軸方向Lの外側縁部である。
ただし、切欠き最外縁36bは、ディスクフランジ外側端縁35bよりホイール軸方向Lの外側に位置してもよく、嵌合ディスクフランジ部35pをホイール軸方向外側に突き抜けて分断していなくてもよい。
ディスクフランジ35のうち、スポーク部33の幅方向中心線Csに対応する部分は、切欠き最外縁36bよりもホイール軸方向Lの内側に延びて切欠き部36を分離または浅くする中央片39を形成しており、その結果、中央片39のディスク周方向両側に切欠き最外縁36bが形成されている。切欠き36は、ホイールの強度および重量バランスのために、スポーク部33の幅方向中心線Csに関して対象になっていることが好ましいが、対称性は多少ずれてもよい。この中央片39は、リム20のドロップ部24(リム20との嵌合部)に嵌合して、溶接されている。
なお、中央片39のホイール軸方向L内側の端縁(以下、「中央片端縁」とう)39aは、ディスクフランジ内側端縁35aよりも軸方向L外側の位置まで延びている。又、切欠き最外縁36bは、ディスクフランジ外側端縁35bよりもホイール軸方向L内側に位置する。
そして、a1<a2とすると狭幅の頸部35nが形成されるので、ディスクフランジの成形工程においてプレス等の成型加工をホイール軸方向Lに行うと、図5に示すように飾り穴34の周辺に矢印P2(飾り穴のスポーク部側の部分に働く力)および矢印P3(飾り穴のディスクフランジ側の部分に働く力)の向きに力が働くとともに、頸部35n近傍の隅部34xに材料が流れ込み易くなり(図5の矢印P1)、加工による隅部34xの割れを抑制できる。又、頸部35nは狭幅であるために幅方向(ホイール軸方向L、ディスクフランジ35の面方向)に曲げやすくなる。このことにより、隅部34xの材料が飾り穴の周方向(ディスクフランジ35の面方向)に伸ばされ難くなるため、プレス等の成型加工による隅部34xの割れをさらに抑制できる。
さらに、切欠き部36を設けることで、ディスクの軽量化を図ることができる。
但し、a1が小さ過ぎると、ディスク30(ホイール10)の強度や耐久性が低下するので、a1はディスクフランジ35の板厚以上とする。好ましくは、a2/3≦a1とし、より好ましくは、a2/2≦a1とする。
ディスク30xにおいても、a1<a2となるので、プレス等の成型加工による飾り穴34の隅部の割れを抑制できる。
又、中央片39を有している場合には、中央片39の接合部w2(中央片端縁39a)でディスクフランジ35とリムを接合(溶接等)すると、リムからスポーク部33側への力の伝達が有効に行われ、ホイールの耐久性が向上する。
一方、切欠き部36(36x)からディスク周方向に離れ、飾り穴34のディスク周方向中央位置CDを含む接合部w3でディスクフランジ35とリムを接合(溶接等)すると、スポーク部33の剛性が高すぎる場合に、スポーク部33(特に外周側曲面接続部R)に掛かる応力を低減し、ホイールの耐久性が向上する。
同様に、外部から見たとき、ディスクフランジがリムから突出して見えないよう、飾り穴に隣接するディスクフランジ外側端縁35bがドロップ部のホイール軸方向外側端(外側サイドウォール部25)より内側に位置することが好ましい。
ここで、嵌合ディスクフランジ部35pと接続ディスクフランジ部35tの半径の差(段付きの量)d1は、ディスクフランジ35の板厚(例えば5mm、さらに一般的には、2.5mm~8mm)より小さいことが望ましい。さらに望ましくは、段付きの量d1は、0.5mm以上でディスクフランジ35の板厚以下が望ましい。段付きの量d1が0.5mm以上でディスクフランジ35の板厚以下であると、ディスクフランジ35の剛性が向上し、結果としてホイール10の耐久性が向上する。また、この段付き部分により、リム20とディスク30の組付け時にリム20とディスク30とのホイール軸方向の位置決めが容易となる。段付きの量d1が0.5mmより小さいとホイール軸方向の位置決めの効果が少なくなってしまう。段付きの量d1がディスクフランジ35の板厚より大きくてもよいが、ディスク30の成形性が悪化することがある。
ここで、嵌合ディスクフランジ部35pと接続ディスクフランジ部35t2の半径の差(段付きの量)d2は、ディスクフランジ35の板厚より小さいことが望ましい。さらに望ましくは、段付きの量d2は、0.5mm以上でディスクフランジ35の板厚以下が望ましい。段付きの量d2が0.5mm以上でディスクフランジ35の板厚以下であると、ディスクフランジ35の剛性が向上し、結果としてホイール10の耐久性が向上する。また、リム20とディスク30の組付け時にリム20とディスク30との嵌合が容易となる。段付きの量d2が0.5mmより小さいと、リム20とディスク30との嵌合が締り嵌めとなっているため、段付きが少なくなるようにディスク30が変形して、そのため段付きの効果が少なくなる。段付きの量d2がディスクフランジ35の板厚より大きくてもよいが、ディスク30の成形性が悪化するとともに、飾り穴34が小さくなり意匠性が低下することがある。
又、図9、図10に示す接続ディスクフランジ部35t(又は35t2)を有しない場合、嵌合ディスクフランジ部35pの幅Wfは、スポーク部33の最も狭い幅B1及び飾り穴34の最も広い幅B2のいずれよりも狭い。
なお、自動車用ホイール10yは、ディスク30yの切欠き部136の形状が異なること以外は、図1~図5に記載の自動車用ホイール10及びディスク30と同一であるので、同一部分については同一符号を付して説明を省略する。
そして、切欠き最外縁136bがディスクフランジ外側端縁35bよりもホイール軸方向Lの外側に位置しているため、図14に示すようにディスク30をリム20に嵌合して組み立てても、切欠き部136の一部(切欠き最外縁136b)が嵌合ディスクフランジ部35pとリム20との嵌合部よりも軸方向Lの外側に表出して小飾り穴134sを形成することになる。
図11に示すように、ディスク30に切欠き部36を設けると、飾り穴34の隅部近傍の歪dの最大値は約50%となった。
一方、図12に示すように、ディスク300に切欠き部を設けない場合、飾り穴34の隅部近傍の歪dの最大値は約90%に達し、隅部の割れを引き起こしやすいことが判明した。
20 リム
24 ドロップ部
30、30x ディスク
33 スポーク部
34 飾り穴
34s 小飾り穴
35 ディスクフランジ
35a ディスクフランジ内側端縁
36、36x 切欠き部
39 中央片
38 突起部
a1 切欠き部と飾り穴の外周縁との最短距離
a2 飾り穴のディスク周方向中央位置および遇部を除いた飾り穴の部分におけるディスクフランジのホイール軸方向の幅
Cs スポーク部の幅方向中心線
CD 飾り穴のディスク周方向中央位置
L ホイール軸方向
S 各スポーク部の半径方向外側端部
Claims (3)
- (a)ドロップ部を有するリムと、
(b)ホイール半径方向外側に放射状に延びる複数のスポーク部と、前記ホイール半径方向外側の端部に位置し前記複数のスポーク部の前記ホイール半径方向外側の先端をディスク周方向に連結するディスクフランジと、を備え、前記スポーク部間にディスク周方向に隅部を有する飾り穴が形成されているディスクと、
を有し、前記リムと前記ディスクフランジ部とが接合する自動車用ホイールであって、
前記ディスクフランジのうち、前記各スポーク部の半径方向外側端部に対応する部分は、前記ディスクフランジのホイール軸方向内側のディスクフランジ内側端縁よりも軸方向外側に切り欠かれた切欠き部を形成し、
前記切欠き部と前記飾り穴の外周縁との最短距離a1は、前記隅部を除く前記飾り穴のディスク周方向位置における前記ディスクフランジの前記ホイール軸方向の幅a2より狭い車両用ホイール。 - 前記ディスクフランジのうち、前記スポーク部の幅方向中心線に対応する部分は、前記切欠き部の前記ホイール軸方向の最外縁よりもホイール軸方向内側に延びる中央片を有し、
当該中央片は前記リムと嵌合する請求項1記載の車両用ホイール。 - 前記中央片と前記リムとの嵌合部が溶接接合されている請求項2記載の車両用ホイール。
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PCT/JP2011/064667 WO2012002319A1 (ja) | 2010-06-30 | 2011-06-27 | 車両用ホイール |
Country Status (6)
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---|---|
US (1) | US8596726B2 (ja) |
JP (1) | JP5057602B2 (ja) |
CN (1) | CN102958707B (ja) |
DE (1) | DE112011102191B4 (ja) |
IN (1) | IN2012MN02922A (ja) |
WO (1) | WO2012002319A1 (ja) |
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- 2011-06-27 WO PCT/JP2011/064667 patent/WO2012002319A1/ja active Application Filing
- 2011-06-27 IN IN2922MUN2012 patent/IN2012MN02922A/en unknown
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Also Published As
Publication number | Publication date |
---|---|
CN102958707A (zh) | 2013-03-06 |
DE112011102191T5 (de) | 2013-04-11 |
DE112011102191B4 (de) | 2016-06-23 |
JPWO2012002319A1 (ja) | 2013-08-22 |
CN102958707B (zh) | 2015-05-20 |
IN2012MN02922A (ja) | 2015-06-12 |
US8596726B2 (en) | 2013-12-03 |
JP5057602B2 (ja) | 2012-10-24 |
US20130119749A1 (en) | 2013-05-16 |
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