WO2015182247A1 - 鞍乗型車両のホイール構造 - Google Patents
鞍乗型車両のホイール構造 Download PDFInfo
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- WO2015182247A1 WO2015182247A1 PCT/JP2015/060649 JP2015060649W WO2015182247A1 WO 2015182247 A1 WO2015182247 A1 WO 2015182247A1 JP 2015060649 W JP2015060649 W JP 2015060649W WO 2015182247 A1 WO2015182247 A1 WO 2015182247A1
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- gap
- circumferential direction
- wall
- gaps
- wall portions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B1/00—Spoked wheels; Spokes thereof
- B60B1/06—Wheels with compression spokes
- B60B1/08—Wheels with compression spokes formed by casting
Definitions
- the present invention relates to a wheel structure of a straddle-type vehicle, and more particularly to a wheel structure of a straddle-type vehicle cast by a die casting method.
- Patent Document 1 Conventionally, as a wheel cast by a die-casting method, a brake disk with a brake disk attached to a spoke portion has been proposed as in Patent Document 1. According to Patent Document 1, there is a technique of devising the shape of the spoke part or providing a rib in order to suppress the twist of the spoke part.
- the shape of the spoke is restricted or the weight of the spoke is increased by the rib in order to ensure the strength of the wheel.
- An object of the present invention is to provide a straddle-type vehicle wheel structure capable of ensuring freedom of design related to the shape of a spoke while suppressing an increase in the weight of the spoke while ensuring the strength of the wheel. There is to do.
- the straddle-type vehicle wheel structure includes a hub portion including an axle insertion portion that forms a hole into which a shaft is inserted, and a hub portion that is separated from the hub portion in a radial direction centered on a central axis of the axle insertion portion.
- a hub portion including an axle insertion portion that forms a hole into which a shaft is inserted, and a hub portion that is separated from the hub portion in a radial direction centered on a central axis of the axle insertion portion.
- an annular shape is formed along the circumferential direction around the central axis, and a rim portion to which a tire is attached, a spoke portion having one end connected to the hub portion and the other end connected to the rim portion
- the hub portion is a position between the axle insertion portion and the rim portion with respect to a radial direction centered on the central axis and at a position separated from both the axle insertion portion and the rim portion.
- An intermediate peripheral wall portion that is formed so as to surround the axle insertion portion along a circumferential direction centered on a central axis, to which one end of the spoke portion is connected, and one end of the axle insertion portion is connected to the intermediate peripheral wall portion.
- the end is connected and the circumferential direction
- the central axis which is composed of a first gap that is opened while the circumferential interval is widened in any one of the directions, and a wall surface facing any two wall portions adjacent to each other in the circumferential direction. Second gaps that are opened while the circumferential interval increases toward the other of the two directions along the two directions are alternately formed between the axle insertion portion and the intermediate peripheral wall portion in the circumferential direction.
- the hub portion has an intermediate peripheral wall portion and a plurality of wall portions.
- the plurality of wall portions are arranged between the intermediate peripheral wall portion and the axle shaft insertion portion in the radial direction with a gap in the circumferential direction.
- Each wall portion of the hub portion can be made thinner by die casting as compared with other casting methods such as gravity casting. That is, the hub portion can be configured such that the thin wall portions are arranged in the circumferential direction with a gap therebetween. In this case, strength is ensured in the hub portion while suppressing an increase in weight.
- the wall portion is provided, the size of the hub portion in the radial direction is ensured. For this reason, a spoke part becomes short compared with the case where such a wall part is not provided. Therefore, since the necessity of adjusting the shape of the spoke part for the purpose of ensuring the strength is reduced, the shape of the spoke part is not easily restricted. As described above, while ensuring the strength of the wheel, it is possible to secure the degree of freedom of the shape of the spoke portion while suppressing an increase in weight.
- the gap between the plurality of wall portions includes a first gap that opens while spreading toward one of the two directions along the central axis, and a second gap that opens while spreading toward the other. . Therefore, in order to form these gaps in the casting process, when a mold that moves in one direction along the central axis and a mold that moves in the other direction are used, the first gap is formed in one mold.
- the second gap can be formed with the other mold. Further, the first gap and the second gap are alternately arranged in the circumferential direction. Therefore, compared with the case where the first gap or the second gap is continuously arranged in the circumferential direction, it is easy to form a thin wall portion that defines these gaps.
- the plurality of wall portions open at least one gap corresponding to either the first gap or the second gap in any of the two directions along the central axis. It is preferable to form in this way.
- any gap is open in any of the two directions. For this reason, the weight increase of a wheel can be suppressed more effectively.
- each of the plurality of wall portions is a plurality of gaps corresponding to either the first gap or the second gap, and is in any of the two directions along the central axis.
- the plurality of gaps that are also open are formed so that a plurality of gaps are arranged with at least another gap corresponding to one of the first gap and the second gap in the circumferential direction. It is preferable that another wall portion that connects the two wall portions adjacent to each other in the circumferential direction to form the outer wall in the circumferential direction is formed.
- a gap in which a wall portion is formed at one end in two directions is disposed between the gaps opened in both directions. And this wall part has connected the wall parts of the both sides of a gap
- the plurality of wall portions are formed so as to open at least two gaps included in the first gap and the second gap in any of the two directions along the central axis.
- the intermediate peripheral wall portion includes a screw hole portion that forms a screw hole for fixing a brake disc, which is disposed between the gaps that are open in both of the two directions with respect to the circumferential direction. Preferably it is.
- middle surrounding wall part contains the screw hole part which forms the screw hole for brake disk fixation arrange
- the screw hole is formed between the connecting portions with the spoke portion in the hub portion. For this reason, when the brake disc is fixed, the load from the brake disc hardly reaches the spoke portion directly. Therefore, the necessity of adjusting the shape of the spoke portion for the purpose of securing the strength is further reduced. Therefore, it is easy to ensure the degree of freedom of design regarding the shape of the spoke.
- FIG. 1 is a side view of a motorcycle according to an embodiment of the present invention.
- FIG. 2 is a right side view of a wheel used in the motorcycle of FIG. 1.
- FIG. 2 is a view of a wheel used in the motorcycle of FIG. 1 as viewed from the left.
- FIG. 4 is an end view of a cut portion along line IV-IV in FIG. 2.
- a two-dot chain line is an outline of the spoke part and the hub part.
- FIG. 5A is a perspective view including a cut portion end surface along C1 in a portion inside the two-dot chain line C1 in the hub portion of FIG.
- FIG. 5B is a perspective view including a cut portion end surface along C2 in a portion inside the two-dot chain line C2 in the hub portion of FIG.
- FIG. 5A is a perspective view including a cut portion end surface along C1 in a portion inside the two-dot chain line C1 in the hub portion of FIG.
- FIG. 5B is
- FIG. 6 is a view showing the end surface of the cut portion appearing in FIGS. 5A and 5B with the left-right direction in the drawing as the circumferential direction.
- FIG. 7 is an end view of a cut portion corresponding to FIG. 6 in a modified example related to the hub portion of the present embodiment.
- FIG. 7 is a cut end face view corresponding to FIG. 6 in another modified example of the hub portion of the present embodiment.
- FIG. 7 is a cut end face view corresponding to FIG. 6 in still another modification example of the hub portion of the present embodiment.
- the motorcycle 1 is provided with a wheel 100 that employs the wheel structure of a saddle riding type vehicle according to the present invention.
- the straddle-type vehicle according to the present invention is not limited to the motorcycle 1.
- a saddle riding type vehicle means any vehicle on which an occupant rides.
- the saddle riding type vehicle may be another type of motorcycle such as an off-road type, a scooter type, a moped type.
- the saddle riding type vehicle of the present invention includes a tricycle, a four wheel buggy (ATV: All Terrain Vehicle) and the like.
- the front-rear direction refers to the front-rear direction of the vehicle as viewed from a rider R seated on a rider seat 11 (described later) of the motorcycle 1.
- the left-right direction is the vehicle left-right direction (vehicle width direction) when viewed from the rider R seated on the rider seat 11.
- An arrow F direction and an arrow B direction in the drawing represent the front and the rear.
- the arrow L direction and the arrow R direction in the figure represent the right side and the left side.
- the front, rear, left, right and up directions correspond to directions when the wheel 100 is provided in the motorcycle 1.
- the motorcycle 1 includes a front wheel 2, a rear wheel 3, a vehicle body frame 4, and a rider seat 11.
- a handle unit 9 is provided at a portion of the body frame 4 in front of the rider seat 11.
- a grip 9R is provided at the left end of the handle unit 9, and a grip 9L is provided at the right end.
- FIG. 1 shows only the grip 9L.
- the grip 9R is disposed on the opposite side of the grip 9L in the left-right direction.
- the grip 9R is an accelerator grip.
- a brake lever is attached near the grip 9R.
- a clutch lever 10 is attached near the grip 9L.
- An upper end portion of the front fork 7 is fixed to the handle unit 9.
- An axle 17 extending along the left-right direction is fixed to the lower end portion of the front fork 7.
- the front wheel 2 is supported on the axle 17.
- the front wheel 2 includes a wheel 100 and a tire 2 a attached to the outer periphery of the wheel 100.
- the front end of the swing arm 12 is swingably supported at the bottom of the body frame 4.
- the rear end portion of the swing arm 12 supports the rear wheel 3.
- the part different from the swing center of the swing arm 12 and the body frame 4 are connected via a rear suspension that absorbs an impact in the vertical direction.
- the vehicle body frame 4 supports a water-cooled engine 13.
- the engine 13 may be air-cooled.
- the body frame 4 may directly support the engine 13 or may indirectly support it through another member.
- a fuel tank 14 is disposed above the engine 13.
- a transmission (not shown) having a plurality of speed change gears is arranged behind the engine 13.
- the driving force of the engine 13 is transmitted to the rear wheel 3 through the transmission and the chain 26.
- a shift pedal 24 for switching the transmission gear is provided on the left side of the transmission.
- Footrests 23 are provided on both sides of the body frame 4 and slightly in front of the rear wheel 3. The rider R puts both feet on the footrest 23 while riding.
- a front cowl 15 is disposed above the front wheel 2 and in front of the grips 9R and 9L.
- a meter unit 16 is disposed between the front cowl 15 and the grips 9R and 9L in the front-rear direction.
- the meter unit 16 is arranged to be inclined with respect to the front-rear direction and the vertical direction so that the display surface faces rearward and upward. On the display surface, vehicle speed, engine speed, vehicle state, travel distance, clock, measurement time, and the like are displayed.
- the wheel 100 has a hub portion 110 that forms an axle insertion hole 111a into which the axle 17 is inserted, and a diameter centered on a central axis C (see FIG. 4) of the axle insertion hole 111a.
- the rim portion 140 is annularly formed along the circumferential direction about the central axis C, and the spoke is connected to the hub portion 110 at one end and to the rim portion 140 at the other end. Part 150.
- the central axis C is along the left-right direction.
- FIGS. 5A is a perspective view of a portion of the hub portion 110 inside the two-dot chain line C1 shown in FIG.
- FIG. 5B is a perspective view of a portion inside the two-dot chain line C2 shown in FIG.
- FIG. 6 is a diagram showing the end surfaces shown in FIGS. 5A and 5B with the left-right direction in the drawing as the circumferential direction ( ⁇ 5 direction).
- the wheel 100 is integrally cast by a die casting method.
- a molten metal such as an aluminum alloy or a magnesium alloy is poured into a hole formed in the mold while applying a high pressure of several tens of MPa (megapascals), and then the molten metal is solidified.
- MPa megapascals
- This is a method for casting a member. Die-casting, unlike gravity casting, allows metal to flow in under pressure, so that molten metal can flow in even if the width of the flow path formed in the mold is narrow. For this reason, the die-casting has a smaller limit value of the member thickness that can be cast as compared with the gravity casting. Therefore, the member can be made relatively thin.
- a boss portion 111 (axle insertion portion) that forms an axle insertion hole 111a is provided at the center of the hub portion 110.
- the boss portion 111 is a cylindrical portion extending in the left-right direction.
- the outer peripheral part of the hub part 110 in the radial direction constitutes a peripheral wall part 115 (intermediate peripheral wall part) extending so as to surround the periphery of the central axis C along a plane orthogonal to the central axis C.
- the peripheral wall portion 115 is a portion along the two-dot chain line D in FIG. 2 (or FIG. 3) in the hub portion 110.
- the peripheral wall portion 115 is disposed at a position between the boss portion 111 and the rim portion 140 in the radial direction and at a position separated from both the boss portion 111 and the rim portion 140. Part of the peripheral wall 115 appears not only in FIGS. 2 and 3 but also in FIG. 4.
- ten wall parts 121 and ten wall parts 122 formed to have a thin thickness in the circumferential direction are formed.
- the wall portions 121 and 122 will be described below with reference to FIGS. 3, 5, and 6.
- the number of wall portions 121 and the number of wall portions 122 may be less than 10 or 11 or more.
- the wall portions 121 and 122 extend radially from the boss portion 111 toward the peripheral wall portion 115 in a radial direction, and are arranged while being separated from each other in the circumferential direction.
- Each of the wall parts 121 and 122 has one end connected to the boss part 111 and the other end connected to the peripheral wall part 115.
- the wall portion 121 extends in the left-right direction while being slightly inclined.
- the wall parts 121 adjacent to each other in the circumferential direction are arranged so that the inclination directions are opposite to each other.
- the left ends of the wall portions 121 are connected to each other via a wall portion 123 extending in the radial direction and the circumferential direction one by one.
- Five wall portions 123 are provided.
- each wall portion 123 extends from the boss portion 111 to the peripheral wall portion 115 along the radial direction. The intervals in the circumferential direction between the wall portions 123 are the same.
- a gap 131 is formed between the wall portions of the pair of wall portions 121. That is, the pair of wall portions 121 form a gap 131 between them.
- the range of the gap 131 is defined by two flat wall surfaces (for example, wall surfaces 121 a and 121 b in FIG. 6) that face each other in the circumferential direction in the pair of wall portions 121. Since the inclination directions of the two wall surfaces are opposite to each other, the gap 131 extends in both directions along the circumferential direction toward the right. The gap 131 opens while expanding toward the right. The left end portion of the gap 131 is closed by the wall portion 123. When viewed from the right, the gap 131 has a rectangular shape with rounded corners that are long in the radial direction, as shown in FIG. The gap 131 extends from the boss portion 111 to a position slightly inside the peripheral wall portion 115. Five gaps 131 are provided, and are arranged at equal intervals in the circumferential direction.
- the wall portion 122 is connected to the right end portion of the wall portion 121 via a wall portion 124 extending in the circumferential direction.
- the wall 122 extends from the connecting portion with the wall 124 while being slightly inclined toward the left.
- Each wall part 122 is arrange
- the wall part 122 is arrange
- the length of the wall portion 122 in the left-right direction is less than half the length of the wall portion 121.
- each wall portion 124 is provided.
- the number of the wall portions 124 may be less than five or more than five.
- the wall portion 124 protrudes in the radial direction from the boss portion 111 toward the peripheral wall portion 115 and branches into two.
- the pair of branch portions of each wall portion 124 expands in the circumferential direction toward the peripheral wall portion 115, then bends so as to narrow in the circumferential direction near the peripheral wall portion 115, and is connected to the peripheral wall portion 115.
- a gap 132 is formed between the wall 121 and the wall 122 adjacent to each other. That is, the adjacent wall portion 121 and the wall portion 122 form a gap 132 between them.
- the range of the gap 132 is defined by two flat wall surfaces (for example, the wall surfaces 121c and 122a in FIG. 6) facing each other in the wall portions 121 and 122 adjacent to each other in the circumferential direction. Since the inclination directions of the two wall surfaces are opposite to each other, the gap 132 extends in both directions along the circumferential direction toward the left. In addition, the gap 132 opens while expanding toward the left. When viewed from the left, the gap 132 is elongated in the direction in which the wall 123 extends, as shown in FIG. The right end portion of the gap 132 is closed by each branch portion of the wall portion 124.
- a gap 133 is formed between the wall portions 122 adjacent to each other in the circumferential direction. That is, as shown in FIG. 6 (or FIG. 5), the two wall portions 122 adjacent in the circumferential direction form a gap 133 between each other.
- the range of the gap 133 is defined by two flat wall surfaces (for example, the wall surfaces 122b and 122c in FIG. 6) facing each other in the wall portions 122 adjacent to each other in the circumferential direction. Since the inclination directions of the two wall surfaces are opposite to each other, the gap 133 extends in both directions along the circumferential direction toward the right. In addition, the gap 133 opens while expanding toward the right.
- the gap 133 is open in both the left and right directions. When viewed from the right, the gap 133 has a pentagonal shape that is pointed toward the boss 111 as shown in FIG. Five gaps 133 are provided, and are arranged at equal intervals in the circumferential direction.
- the wall portions 121 to 124 and the gaps 131 to 133 are formed in the hub portion 110 as follows as a whole.
- the wall parts 121 and 122 are arranged in the circumferential direction in the order of the wall part 121 ⁇ the wall part 121 ⁇ the wall part 122 ⁇ the wall part 122 ⁇ the wall part 121 ⁇ .
- the wall parts 121 and 122 are arranged in the circumferential direction so that the inclination directions are alternately opposite to each other.
- the gaps 131 to 133 are arranged in the circumferential direction in the order of the gap 131 ⁇ the gap 132 ⁇ the gap 133 ⁇ the gap 132 ⁇ the gap 131 ⁇ .
- the gap 131 and the gap 133 open while expanding toward the right.
- the gap 132 opens while expanding toward the left. Therefore, the gap opened to the right and opened (one of the first and second gaps in the present invention) and the gap opened to the left and opened (the first and second gaps in the present invention).
- a wall portion 123 that connects the pair of wall portions 121 that define the gap 131 in the circumferential direction is formed at the left end portion of the gap 131.
- a wall portion 123 that connects the wall portions 121 and 122 defining the gap 131 in the circumferential direction is formed at the right end portion of the gap 132. That is, the gaps 131 and 132 are opened only in one of the left and right directions (two directions in the present invention). On the other hand, the gap 133 is open in both the left and right directions. Therefore, the gaps opened in both the left and right directions are arranged in the circumferential direction with three gaps opened only in one left and right direction. Note that the number of gaps opened only in one left-right direction sandwiched by gaps opened in both the left and right directions may be less than three or four or more.
- boss portions 116 are formed in the peripheral wall portion 115.
- the number of the boss portions 116 may be less than 5 or 6 or more.
- the boss portion 116 forms a screw hole 116a for fixing the brake disc 160 with a bolt.
- the boss portion 116 is disposed at a connection portion between the peripheral wall portion 115 and the wall portion 123.
- hub part 116 is arrange
- the boss part 116 is disposed between the connection parts of the peripheral wall part 115 and the spoke part 150 in the circumferential direction.
- the tire 2a is attached to the rim portion 140 on a surface far from the central axis C in the radial direction.
- the mounting surface of the tire 2 a includes a flat portion 141 and a concave portion 142 that is recessed from the flat portion 141 in the radial direction toward the peripheral wall portion 115 of the hub portion 110.
- the recess 142 is formed over the entire circumference of the rim portion 140.
- a concave portion 143 that is recessed toward the attachment surface of the tire 2a is formed on the surface of the rim portion 140 opposite to the attachment surface of the tire 2a.
- the spoke part 150 includes plate members 151 and 152 that are aligned with each other with a gap 155 in the circumferential direction.
- the plate members 151 and 152 are thin plate members that are thin in the circumferential direction and have shapes that overlap each other when viewed from the circumferential direction.
- the plate members 151 and 152 each extend from the peripheral wall portion 115 of the hub portion 110 to the rim portion 140. More specifically, the plate members 151 and 152 extend from the pair of branch portions of the wall portion 124 toward the rim portion 140 in the peripheral wall portion 115. The distance between the plate members 151 and 152 in the circumferential direction is smaller as it is closer to the rim portion 140 in the radial direction.
- Ribs 153 and 154 are formed between the plate members 151 and 152. As shown in FIG. 4, the rib 153 is disposed at the center of the plate members 151 and 152 in the left-right direction, and protrudes from the rim portion 140 toward the peripheral wall portion 115 of the hub portion 110 in the radial direction.
- the rib 154 is disposed at the center of the plate members 151 and 152 in the left-right direction, and protrudes from the peripheral wall portion 115 toward the rim portion 140 in the radial direction.
- the rib 153 is longer in the radial direction than the rib 154.
- the gap 155 penetrates the spoke part 150 in the left-right direction. This penetrating range is a range from one end of the rib 153 farther from the rim portion 140 to one end of the rib 154 closer to the rim portion 140 in the radial direction.
- Ribs 156 are formed on the surface of the plate member 151 in the vicinity of the rim portion 140 on the surface opposite to the plate member 152 in the circumferential direction.
- the rib 156 is formed so that the circumferential width gradually increases toward the rim portion 140.
- Ribs 157 are formed on the surface of the plate member 152 in the vicinity of the rim portion 140 on the surface opposite to the plate member 151 in the circumferential direction.
- the ribs 157 are formed so that the circumferential width gradually increases toward the rim portion 140.
- the hub portion 110 has the plurality of wall portions 121 and 122 arranged in the radial direction between the peripheral wall portion 115 and the boss portion 111 with the gaps 131 to 133 interposed in the circumferential direction. It has a configuration. As shown in FIG. 6, the walls 121 and 122 are formed thin in the circumferential direction. Since the wheel 100 is cast by the die casting method, the walls 121 and 122 can be formed relatively thin as described above. Accordingly, the hub portion 110 is configured such that the thin wall portions 121 and 122 are arranged in the circumferential direction with the gaps 131 to 133 interposed therebetween. Therefore, the hub portion 110 is secured with rigidity while suppressing an increase in weight.
- the hub portion 110 is secured in size to arrange the wall portions 121 and 122 as described above.
- the spoke part 150 is pinched
- the gaps 131 and 133 are opened while spreading toward the right, and the gap 132 is opened while spreading toward the left. Therefore, when removing the wheel from the mold in the casting process, when one mold is moved to the right and the other mold is moved to the left, the gaps 131 and 133 correspond to one mold. A draft angle is provided, and a draft angle corresponding to the other mold is provided in the gap 132. Therefore, the gaps 131 and 133 can be formed using one mold, and the gap 132 can be formed using the other mold.
- the gaps 131 or 133 and the gaps 132 are alternately arranged in the circumferential direction. If the gap 131 or 133 continues in the circumferential direction, or if the gap 132 continues in the circumferential direction, a gap that expands in the same direction will continue. In this case, the wall portion tends to be thick in order to fill the gaps. On the other hand, in the present embodiment, the gap 131 or 133 that widens toward the right and the gap 132 that widens toward the left are alternately arranged in the circumferential direction. Therefore, as shown in FIG. 6, the walls 121 and 122 that define the gaps 131 to 133 can be easily formed thin.
- gaps 131 and 132 in which a wall 123 or 124 is formed at either the left end or the right end.
- the wall parts 123 and 124 connect the wall parts 121 on both sides of the gap or the wall parts 121 and 122 in the circumferential direction. For this reason, rigidity is ensured in the portion where the gaps 131 and 132 are formed.
- the boss portion 116 for fixing the brake disc 160 is disposed between the gaps 131 in the circumferential direction. Specifically, it is arrange
- the boss portion 116 is disposed at the wall portion 123 that connects the wall portions 121 to each other in the circumferential direction. Therefore, when the brake disc 160 is fixed to the boss portion 116, the hub portion 110 can easily support the load from the brake disc 160.
- the boss portion 116 is disposed in a portion between the connection portions of the peripheral wall portion 115 and the spoke portion 150.
- the spoke portion 150 of the present embodiment is lightened by the formation of the gap 155, while the rigidity is ensured by the formation of the ribs 153 and 154.
- the rib 153 is formed at an end portion of the spoke portion 150 that is closer to the rim portion 140. Since the distance between the plate members 151 and 152 is narrow at this position, the rib 153 formed in this portion connects the plate members 151 and 152 with a smaller volume (that is, a smaller weight) than the rib 154. Can do. Furthermore, since the rib 153 is formed longer in the radial direction than the rib 154, the rigidity of the spoke part 150 is efficiently enhanced while suppressing an increase in weight. In addition, by increasing the rigidity of the spoke part 150 in this way, so-called brake squeal that occurs in the spoke part 150 when the brake is operated in the brake disc 160 is suppressed.
- the strength of the wheel 100 of the present embodiment is ensured mainly in the hub portion 110.
- the rigidity of the spoke part is mainly improved.
- the rigidity is enhanced by providing ribs in the spoke portions.
- the strength of the wheel 100 is ensured by securing the size of the hub portion 110 and improving the rigidity thereof. Therefore, it is possible to ensure strength while reducing the weight as compared with the prior art.
- the first modification has a plurality of wall portions 201 and 202 as shown in FIG.
- the wall portion 201 extends in the left-right direction while being inclined. Then, the wall portions 201 whose inclination directions are opposite to each other are alternately arranged in the circumferential direction.
- the right end portions of the wall portion 201 are connected to each other in pairs.
- a wall 202 that extends in the circumferential direction is connected to the left end of the wall 201.
- Two adjacent walls 201 form gaps 211 and 212 between each other.
- the gap 211 (one of the first gap and the second gap) opens while expanding toward the right.
- the gap 211 also opens to the left via a through hole 211a that penetrates the wall portion 202 in the left-right direction.
- the gap 212 (the other of the first gap and the second gap) opens while expanding toward the left. Therefore, in this modification, the gaps 211 opened in both the left and right directions and the gap 212 opened only in the left direction are alternately arranged in the circumferential direction.
- the second modified example has a plurality of wall portions 203 to 205 as shown in FIG.
- the wall 203 extends in the left-right direction while being inclined. And the wall part 203 in which the inclination directions are opposite to each other is alternately arranged in the circumferential direction.
- a wall portion 204 extending in the circumferential direction is connected to the right end portion of the wall portion 203.
- a wall portion 205 extending in the circumferential direction is connected to the left end portion of the wall portion 203.
- Two adjacent walls 203 form gaps 213 and 214 between each other.
- the gap 213 (one of the first gap and the second gap) opens while expanding toward the right.
- the gap 213 is also opened to the left via a through hole 213a penetrating the wall portion 205 in the left-right direction.
- the gap 214 (the other of the first gap and the second gap) opens while expanding toward the left.
- the gap 214 also opens leftward through a through hole 214a that penetrates the wall portion 204 in the left-right direction. Therefore, in this modification, the gaps 213 and 214 opened in both the left and right directions are alternately arranged in the circumferential direction.
- the third modified example has a plurality of wall portions 206 as shown in FIG.
- the wall portion 206 extends in the left-right direction while being inclined. Further, the wall portions 206 whose inclination directions are opposite to each other are alternately arranged in the circumferential direction.
- Two adjacent walls 206 form gaps 215 and 216 between each other.
- the gap 215 one of the first gap and the second gap
- the gap 216 (the other of the first gap and the second gap) opens while expanding toward the left, and also opens toward the right. Therefore, in this modification, the gaps 215 and 216 opened in both the left and right directions are alternately arranged in the circumferential direction.
- the fourth modified example has a plurality of wall portions 207 to 209 as shown in FIG.
- the wall portion 207 extends in the left-right direction while being inclined.
- the wall portions 207 whose inclination directions are opposite to each other are alternately arranged in the circumferential direction.
- the wall portions 207 are connected to each other in the circumferential direction by a wall portion 208 at the right end portion and a wall portion 209 at the left end portion.
- the walls 208 and 209 extend in the circumferential direction.
- Two adjacent wall portions 207 form gaps 217 and 218 between each other.
- the gap 217 one of the first gap and the second gap
- the gap 218 (the other of the first gap and the second gap) opens while expanding only to the left. Therefore, in this modification, the gaps 217 and 218 opened in only one of the left and right directions are alternately arranged in the circumferential direction.
- the fifth modification example has a plurality of wall portions 221 as shown in FIG.
- the wall portion 221 extends in the left-right direction while being inclined. And the wall part 221 whose inclination direction is mutually opposite direction is located in a line with the circumferential direction alternately.
- the wall portions 221 are connected to each other at both left and right end portions.
- Two adjacent wall portions 221 form gaps 231 and 232 between each other.
- the gap 231 one of the first gap and the second gap
- the gap 232 (the other of the first gap and the second gap) opens while expanding only to the left. Therefore, in this modification, the gaps 231 and 232 opened only in one of the left and right directions are alternately arranged in the circumferential direction.
- the sixth modification has a plurality of wall portions 222 and 223 as shown in FIG.
- the wall portion 222 extends in the left-right direction while being inclined. And the wall part 222 whose inclination direction is mutually opposite direction is located in a line with the circumferential direction alternately.
- the wall portions 222 are connected at the right end.
- Two adjacent walls 222 form gaps 233 and 234 between each other.
- the gap 233 (one of the first gap and the second gap) opens while expanding only to the right.
- a wall portion 223 that connects the wall portions 222 in the circumferential direction is formed at the left end of the gap 233.
- the gap 234 (the other of the first gap and the second gap) opens while expanding only to the left. Therefore, in this modification, the gaps 233 and 234 opened only in one of the left and right directions are alternately arranged in the circumferential direction.
- the seventh modification has a plurality of wall portions 224 and 225 in which end portions in the left-right direction are connected to each other.
- the walls 224 and 225 extend in the left-right direction while being inclined.
- the wall portions 224 and 225 are arranged in the circumferential direction in the order of two wall portions 224 whose inclination directions are opposite to each other, and two wall portions 225 which have inclination directions opposite to each other.
- the length of the wall portion 225 in the left-right direction is less than half the length of the wall portion 224.
- the adjacent wall portion 224 and the wall portion 225 form a gap 234 (one of the first gap and the second gap) between them.
- the gap 234 opens while expanding only to the left.
- Two adjacent wall portions 225 form a gap 235 therebetween (the other of the first gap and the second gap).
- the gap 235 opens while expanding only to the right.
- Two adjacent wall portions 224 form a gap 236 between each other (the other of the first gap and the second gap).
- the gap 236 opens while expanding only to the right.
- the gaps 234 to 236 are arranged in the circumferential direction in the order of the gap 234 ⁇ the gap 235 ⁇ the gap 234 ⁇ the gap 236 ⁇ the gap 234 ⁇ . Therefore, in this modification, the gaps 235 or 236 opened only to the right and the gaps 234 opened only to the left are alternately arranged in the circumferential direction.
- the eighth modification has a plurality of wall portions 226 to 228 in which end portions in the left-right direction are connected to each other.
- the wall portions 226 to 228 extend in the left-right direction while being inclined.
- the wall portions 226 to 228 are arranged in the circumferential direction in the order of wall portion 226 ⁇ two wall portions 227 ⁇ wall portion 226 ⁇ two wall portions 228 ⁇ wall portion 226 ⁇ .
- Two wall portions adjacent to each other are inclined in opposite directions.
- the length of the wall portion 227 in the left-right direction is less than half the length of the wall portion 226.
- the length of the wall portion 228 in the left-right direction is about half of the length of the wall portion 226.
- the adjacent wall portion 226 and the wall portion 227 form a gap 237 (one of the first gap and the second gap) between them.
- the gap 237 opens while expanding only to the left.
- Two adjacent wall portions 227 form a gap 238 between them (the other of the first gap and the second gap).
- the gap 238 opens while expanding only to the right.
- Adjacent wall portion 226 and wall portion 228 form a gap 239 between each other (the other of the first gap and the second gap).
- the gap 239 opens while expanding only to the right.
- the two wall portions 228 adjacent to each other form a gap 240 (one of the first gap and the second gap) between them.
- the gap 240 opens while expanding only to the left.
- the gaps 237 to 240 are arranged in the circumferential direction in the order of gap 237 ⁇ gap 238 ⁇ gap 237 ⁇ gap 239 ⁇ gap 240 ⁇ gap 239 ⁇ gap 237 ⁇ . Therefore, in this modification, the gaps 238 or 239 opened only to the right and the gaps 237 or 240 opened only to the left are alternately arranged in the circumferential direction.
- the ninth modification has a plurality of wall portions 251 to 257.
- the wall portions 251 to 253 extend in the left-right direction while being inclined. Of the wall portions 251 to 253, two adjacent wall portions are inclined in opposite directions.
- the wall portions 252 and 253 are both less than half the length of the wall portion 251 in the left-right direction.
- the right end portion of the wall portion 251 and the right end portion of the wall portion 252 are connected by a wall portion 254 extending in the circumferential direction.
- the left end portions of the wall portion 252 are connected by a wall portion 255 extending in the circumferential direction.
- the left end portion of the wall portion 251 and the left end portion of the wall portion 253 are connected by a wall portion 256 extending in the circumferential direction.
- the right end portions of the wall portion 253 are connected by a wall portion 257 extending in the circumferential direction.
- the wall portions 251 to 257 are: wall portion 251 ⁇ wall portion 254 ⁇ wall portion 252 ⁇ wall portion 255 ⁇ wall portion 252 ⁇ wall portion 254 ⁇ wall portion 251 ⁇ wall portion 256 ⁇ wall portion 253 ⁇ wall portion 257 ⁇ wall portion 253 ⁇ Wall portion 256 ⁇ wall portion 251 ⁇ ... Are arranged in the circumferential direction in this order.
- the adjacent wall portion 251 and the wall portion 252 form a gap 261 (one of the first gap and the second gap) between them.
- the gap 261 opens while expanding only to the left.
- Two adjacent wall portions 252 form a gap 262 (the other of the first gap and the second gap) between them.
- the gap 262 opens while expanding only to the right.
- the adjacent wall portion 251 and the wall portion 253 form a gap 263 (the other of the first gap and the second gap) between them.
- the gap 263 opens while expanding only to the right.
- Two adjacent wall portions 253 form a gap 264 between them (one of the first gap and the second gap). The gap 264 opens while expanding only to the left.
- the gaps 261 to 264 are arranged in the circumferential direction in the order of gap 261 ⁇ gap 262 ⁇ gap 261 ⁇ gap 263 ⁇ gap 264 ⁇ gap 263 ⁇ gap 261 ⁇ . Therefore, in this modification, the gaps 262 or 263 that are opened only to the right and the gaps 261 or 264 that are opened only to the left are alternately arranged in the circumferential direction.
- a gap such as the gap 131 formed between the wall portions extends in both directions along the circumferential direction toward at least one of the left and right directions. However, it may spread in any one of the circumferential directions in at least one of the left and right directions. For example, as shown in FIG. 6, the gap 131 widens in both the left and right directions ( ⁇ 5 direction) in the figure toward the upper side (right side) in the figure. However, instead of the gap 131 in FIG. 6, it expands upward in the figure only to the left in the figure, and a gap in which the right end in the figure is linearly formed in the vertical direction in the figure is formed in the hub portion. May be.
- the wall surface such as the wall portion 121 that defines the gap such as the gap 131 is formed flat.
- the wall surface that defines the gap may be along a curved surface.
- the curved surface may be formed so that the gap defined by the curved surface expands in the circumferential direction toward at least one of the left and right directions.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
以上、本発明の好適な実施の形態及び各種の変形例について説明したが、本発明は上記実施形態に限られるものではなく、特許請求の範囲に記載した限りにおいて様々な変更が可能である。また、本明細書における変形例は適宜組み合わせて実施することができる。なお、本明細書において「好ましい」という用語は非排他的なものであって、「好ましいがこれに限定されるものではない」ということを意味するものである。
100 ホイール
110 ハブ部
111a 車軸挿入穴
115 周壁部
116a ねじ穴
121a-c 壁面
122a-c 壁面
121-124 壁部
131-133 間隙
140 リム部
150 スポーク部
160 ブレーキディスク
201-228 壁部
251-257 壁部
231-240 間隙
261-264 間隙
Claims (5)
- 車軸が挿入される穴を形成する車軸挿入部を含むハブ部と、
前記車軸挿入部の中心軸を中心とした径方向に関して前記ハブ部から離隔した位置に、前記中心軸を中心とした周方向に沿って環状に形成され、タイヤが取り付けられるリム部と、
前記ハブ部に一端が、前記リム部に他端がそれぞれ接続されたスポーク部と、を備え、
前記ハブ部は、
前記中心軸を中心とした径方向に関して前記車軸挿入部と前記リム部の間の位置であって前記車軸挿入部及び前記リム部の両方から離隔した位置に、前記中心軸を中心とした周方向に沿って前記車軸挿入部を取り囲むように形成され、前記スポーク部の一端が接続された中間周壁部と、
前記車軸挿入部に一端が、前記中間周壁部に他端が接続され、前記周方向に配列された複数の壁部と、を含み、
前記複数の壁部は、
前記周方向に隣り合う任意の2つの壁部の互いに対向する壁面で構成される、前記中心軸に沿った2方向のうちのいずれか一方向に向かって前記周方向の間隔が広がりつつ開口した第1間隙と、前記周方向に隣り合う任意の2つの壁部の互いに対向する壁面で構成される、前記中心軸に沿った2方向のうちの他方向に向かって前記周方向の間隔が広がりつつ開口した第2間隙とを、前記車軸挿入部と前記中間周壁部の間に前記周方向に関して交互に形成することを特徴とする、
ダイカスト鋳造法によって鋳造された鞍乗型車両のホイール構造。 - 前記複数の壁部は、前記第1間隙および前記第2間隙のいずれかに対応する少なくとも1つの間隙を、前記中心軸に沿った前記2方向のいずれにも開口するように形成していることを特徴とする請求項1に記載の鞍乗型車両のホイール構造。
- 前記複数の壁部は、それぞれが前記第1間隙および前記第2間隙のいずれかに対応する複数の間隙であって、前記中心軸に沿った前記2方向のいずれにも開口した複数の間隙を、前記周方向に関して、前記第1間隙および前記第2間隙のいずれかに対応する別の間隙を少なくとも挟んで複数配列されるように形成しており、
前記別の間隙を形成する前記周方向に隣り合う前記2つの壁部同士を前記周方向に接続するさらに別の壁部が形成されていることを特徴とする請求項2に記載の鞍乗型車両のホイール構造。 - 前記複数の壁部は、前記第1間隙および前記第2間隙に含まれる少なくとも2つの間隙を、前記中心軸に沿った前記2方向のいずれにも開口するように形成しており、
前記中間周壁部は、前記周方向に関して、前記2方向のいずれにも開口した前記間隙同士の間に配置された、ブレーキディスク固定用のねじ穴を形成するねじ穴部を含んでいることを特徴とする請求項3に記載の鞍乗型車両のホイール構造。 - 前記中間周壁部は、前記周方向に関して前記スポーク部との接続部同士の間に配置された、ブレーキディスク固定用のねじ穴を形成するねじ穴部を含んでいることを特徴とする請求項1~4のいずれか1項に記載の鞍乗型車両のホイール構造。
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JP2016523367A JPWO2015182247A1 (ja) | 2014-05-27 | 2015-04-03 | 鞍乗型車両のホイール構造 |
TW106146641A TW201811580A (zh) | 2014-05-27 | 2015-05-27 | 跨坐型車輛之輪圈構造 |
TW104117028A TW201600363A (zh) | 2014-05-27 | 2015-05-27 | 跨坐型車輛之輪圈構造 |
TW105115416A TW201630756A (zh) | 2014-05-27 | 2015-05-27 | 跨坐型車輛之輪圈構造 |
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TW (3) | TW201630756A (ja) |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003320801A (ja) * | 2002-04-26 | 2003-11-11 | Honda Motor Co Ltd | 自動二輪車用ホイール |
JP2011213237A (ja) * | 2010-03-31 | 2011-10-27 | Honda Motor Co Ltd | 鞍乗り型車両のホイール構造 |
-
2015
- 2015-04-03 WO PCT/JP2015/060649 patent/WO2015182247A1/ja active Application Filing
- 2015-04-03 JP JP2016523367A patent/JPWO2015182247A1/ja active Pending
- 2015-05-27 TW TW105115416A patent/TW201630756A/zh unknown
- 2015-05-27 TW TW104117028A patent/TW201600363A/zh unknown
- 2015-05-27 TW TW106146641A patent/TW201811580A/zh unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003320801A (ja) * | 2002-04-26 | 2003-11-11 | Honda Motor Co Ltd | 自動二輪車用ホイール |
JP2011213237A (ja) * | 2010-03-31 | 2011-10-27 | Honda Motor Co Ltd | 鞍乗り型車両のホイール構造 |
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TW201630756A (zh) | 2016-09-01 |
TW201600363A (zh) | 2016-01-01 |
JPWO2015182247A1 (ja) | 2017-04-20 |
TW201811580A (zh) | 2018-04-01 |
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