JP2012040947A - Wheel for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rigidity and durability of a wheel for a vehicle.SOLUTION: A plurality of ribs 40 are disposed on the hub attachment part 21 of a disk 20 of the wheel 1 for the vehicle at an interval in the circumferential direction. A plurality of spoke parts 30 are disposed between the hub attachment part 21 and a rim 10 at an interval in the circumferential direction so as to join the continuous wall 24 of the hub attachment part 21 to the rim 10. Center lines 31 of respective spoke parts 30 are directed to the radial direction of the wheel 1. Viewing from the axial direction of the wheel 1, one of the plurality of ribs 40 is arranged on the center line 31 of each spoke part 30.

Description

  The present invention relates to a vehicle wheel.

  Patent document 1 is disclosing the vehicle wheel which has a rim | limb part and a disk part. A hub attachment portion having a hub hole is provided at a central portion in the wheel radial direction of the disc portion, and an annular continuous wall is formed around the hub attachment portion. A plurality of bolt holes are provided between the hub hole and the continuous wall at intervals in the circumferential direction of the wheel. Furthermore, a plurality of ribs are formed from the continuous wall in the wheel circumferential direction at intervals in the wheel circumferential direction toward the inner side in the wheel radial direction (hub hole side). It is provided radially.

JP 2005-324799 A

However, in the case of the vehicle wheel described in Patent Document 1, each rib is formed in the wheel circumferential direction at an intermediate position between adjacent spoke portions, and the bolt hole provided between the ribs Are arranged in the radial direction of the wheel and the wheel. For this reason, when a lateral load is applied to the vehicle and bending stress is generated in the spoke portion, the stress is not transmitted well to each rib through the continuous wall, that is, the stress is not efficiently transmitted to the hub mounting portion. As a result, the rigidity and durability of the vehicle wheel are reduced.
Therefore, the present invention has been made to solve the above-described problems, and an object thereof is to provide a vehicle wheel that can improve rigidity and durability.

The present invention provides a vehicle wheel having a rim and a disk, wherein the disk includes a hub mounting portion disposed at a central portion in the wheel radial direction of the disk, and a plurality of radially extending wheels from the hub mounting portion radially outward. Spoke portion, and the hub attachment portion includes an annular continuous wall formed on an outer peripheral portion of the hub attachment portion, and a hub hole disposed in a wheel radial center portion of the disk, A plurality of bolt holes arranged at intervals in the wheel circumferential direction between the hub hole and the continuous wall, and a rib formed between the adjacent bolt holes are provided, and the spoke portion One said rib is arrange | positioned on the centerline of each wheel radial direction of these.
The load input to the rim is transmitted to each spoke part, and is directly and efficiently transmitted from each spoke part to the corresponding rib. Therefore, even if a lateral load is applied to the vehicle and a bending stress acts on the spoke portion, it is possible to prevent or suppress the twisting from acting on the continuous wall, and the rigidity and durability of the vehicle wheel can be greatly improved. .

It is preferable that the spoke portion is a twin spoke having a pair of spoke pieces, and the center lines in the wheel radial direction of the pair of spoke pieces intersect on the rib when viewed from the wheel axial direction.
Thereby, the load input to the rim is directly and efficiently transmitted to the ribs through the respective spoke pieces. Therefore, the rigidity and durability of the vehicle wheel can be further improved.

It is preferable that the said continuous wall between the said spoke parts which adjoin is linear or the concave curve shape dented toward the wheel radial direction center.
A part of the load transmitted from the rim to each spoke part is transmitted from the joint part between the spoke part and the continuous wall to the joint part between the adjacent spoke part and the continuous wall. By making the portion of the continuous wall between two adjacent spoke portions straight, it is possible to improve the force transmission efficiency. Therefore, the rigidity and durability of the vehicle wheel can be further improved. In addition, the stress at the joint between the spoke and the continuous wall is obtained by forming the continuous wall portion between the two adjacent spoke portions into a concave curve shape that is recessed inward toward the center in the radial direction of the wheel. Concentration can be reduced and the durability of the vehicle wheel can be improved.

  According to the present invention, the rigidity and durability of the vehicle wheel can be improved.

It is a front view showing roughly the wheel for vehicles of a 1st embodiment of the present invention. It is a front view which shows an example of the detailed structure of the vehicle wheel of the said 1st Embodiment. It is sectional drawing which follows the III-III line of FIG. FIG. 3 is a rear view of the vehicle wheel in FIG. 2. It is a front view which shows roughly the wheel for vehicles of 2nd Embodiment of this invention. It is a front view which shows roughly the wheel for vehicles of 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 schematically shows a vehicle wheel 1 according to a first embodiment. 2 to 4 show an example of a detailed structure of the vehicle wheel 1 described above.

  The vehicle wheel 1 is made of a light alloy such as an aluminum alloy or a magnesium alloy, but is not limited to this, and may be made of steel. The vehicle wheel 1 is formed by casting, but is not limited to this, and may be formed by forging or other manufacturing methods.

  The vehicle wheel 1 includes a rim 10 and a disk 20. The rim 10 and the disk 20 are integrally formed by casting, for example. However, the rim 10 and the disk 20 are not limited to this, and are connected after the rim 10 and the disk 20 are manufactured separately. Also good.

  The rim 10 has an annular shape. A tire (not shown) is attached to the outer periphery of the rim 10.

  A disk 20 is provided inside the rim 10 in the radial direction. The disk 20 has a hub attachment portion 21 and a plurality of spoke portions 30. The hub attachment portion 21 includes a hub hole 25 disposed at the center portion, a bolt hole 26, and a continuous wall 24 formed on the outer peripheral portion.

  As shown in FIG. 3, a hub hole 25 is formed in the center portion of the hub attachment portion 21, and thus in the center portion in the wheel radial direction of the vehicle wheel 1. A hub (not shown) is attached to the hub hole 25.

  The hub attachment portion 21 has an annular flat plate shape. The outer surface in the axial direction of the hub attachment portion 21 is smoothly connected to the hem of the outer peripheral surface of the hub hole 25.

  As shown in FIGS. 1 and 2, a plurality of bolt holes 26 are formed in the hub attachment portion 21. Each bolt hole 26 penetrates the hub attachment portion 21 in the thickness direction (the wheel axial direction of the vehicle wheel 1). The plurality of bolt holes 26 are spaced apart from each other in the circumferential direction of the hub attachment portion 21 and are preferably arranged at equal intervals. The bolt hole 26 accommodates a bolt (not shown) for connection to the axle.

  A continuous wall 24 surrounds the outer periphery of the hub attachment portion 21. The continuous wall 24 is formed in a cylindrical shape that continues to the outer peripheral edge of the hub attachment portion 21 and projects from there to the outside in the wheel axis direction (front side in FIG. 1). As shown in FIG. 2, the continuous wall 24 has a cylindrical shape that protrudes while expanding the diameter outward in the wheel axis direction. As shown in FIG. 3, the outer end portion of the continuous wall 24 protrudes outward in the wheel axial direction from the outer end surface of the hub attachment portion 21. As shown in FIG. 1, the outer peripheral edge of the continuous wall 24 is substantially polygonal when viewed from the wheel axis direction of the vehicle wheel 1. That is, the continuous wall 24 is configured by connecting a plurality of linear side portions 27 in an annular shape. As shown in FIG. 1, in this embodiment, the continuous wall 24 has five straight side portions 27, and the outer peripheral edge of the continuous wall 24 is substantially pentagonal. As shown in FIG. 2, according to the detailed structure of the first embodiment, the side portion 27 has a central portion of the side portion 27 in the wheel radial direction of the vehicle wheel 1 when viewed from the axial direction of the vehicle wheel 1. It is in the shape of a gentle concave curve that dents toward the center.

Further, the hub attachment portion 21 is provided with a plurality of ribs 40. The rib 40 is disposed between two adjacent bolt holes 26, 26 of the hub attachment portion 21, and is formed to protrude toward the outer peripheral side in the wheel axial direction. Bolt holes 26 and ribs 40 are alternately arranged in the circumferential direction of the vehicle wheel 1. The plurality of ribs 40 are spaced apart from each other in the circumferential direction, preferably at regular intervals. As shown in FIGS. 3 and 4, according to the detailed structure of the first embodiment, the portion corresponding to the rib 40 on the inner surface in the wheel axial direction of the hub mounting portion 21 is provided with a recess 23 e for weight reduction. Is formed.
The number of the bolt holes 26 and the ribs 40 is five in this embodiment, but is not limited to this, and may be four or less, or may be six or more. The number of bolt holes 26 and the number of ribs 40 are not limited to the same, and may be different from each other.

  As shown in FIG. 1, the center line 41 of each rib 40 is directed in the wheel radial direction of the vehicle wheel 1. As shown in FIG. 2, according to the detailed structure, the rib 40 extends in the wheel radial direction of the vehicle wheel 1 so as to connect the continuous wall 24 and the hub mounting portion 21. As shown in FIG. 3, the end of the rib 40 on the outer peripheral side in the wheel radial direction of the vehicle wheel 1 is integrally connected to the continuous wall 24. As shown in FIG. 2, the connecting portion between the rib 40 and the continuous wall 24 is located at the joint portion 28 of the two side portions 27 of the continuous wall 24. When viewed from the outside in the wheel axial direction of the vehicle wheel 1, the rib 40 has a width (dimension in the circumferential direction of the vehicle wheel 1) that decreases toward the inner peripheral side in the radial direction, and is generally triangular. ing.

  As shown in FIG. 1, a plurality of spoke portions 30 are provided between the rim 10 and the attachment portion 21. The rim 10 and the hub attachment part 21 are connected via the spoke part 30. The center line 31 of each spoke part 30 is directed in the wheel radial direction of the vehicle wheel 1. The plurality of spoke portions 30 are spaced apart from each other in the wheel circumferential direction of the vehicle wheel 1 and are preferably arranged at regular intervals. The number of spoke portions 30 is equal to the number of ribs 40. In this embodiment, the number of spoke portions 30 is five, but is not limited to this, and may be four or less, or may be six or more.

  As shown in FIG.1 and FIG.2, the spoke part 30 of 1st Embodiment is comprised by the twin spoke which has a pair of spoke piece 32. As shown in FIG. The pair of spoke pieces 32 are V-shaped so as to be separated from each other toward the outer peripheral side in the wheel radial direction of the vehicle wheel 1. The pair of spoke pieces 32 are symmetrical to each other with respect to the center line 31 of the spoke portion 30. Each spoke piece 32 is inclined with respect to the center line 31.

  An end portion of each spoke piece 32 on the outer peripheral side in the wheel radial direction of the vehicle wheel 1 is connected to the rim 10. An end portion on the inner peripheral side in the wheel radial direction of the vehicle wheel 1 in each spoke piece 32 is connected to the hub attachment portion 21. The connection part of the spoke part 30 and the hub attachment part 21 is located at the joint part 28 of the adjacent side part 27 of the continuous wall 24 having a polygonal shape.

  As shown in FIG. 2, the opposite edges of the pair of spoke pieces 32 in the spoke portion 30 form an arcuate R portion 34 in the vicinity of the joint portion 28, and are smoothly continuous with each other. An edge of each spoke piece 32 facing the opposite side of the paired counterpart spoke piece 32 forms an arcuate R portion 35 and smoothly continues to the outer peripheral edge of the continuous wall 24.

  The connecting portion of each spoke piece 32 with the rim 10 is slightly bent so as to be substantially perpendicular to the tangent line of the rim 10 at the connecting portion. Both edges in the width direction of each spoke piece 32 form an arcuate R portion 36 in the vicinity of the rim 10 and are smoothly continuous with the inner periphery of the rim 10.

The most characteristic part of the present invention will be described.
As shown in FIGS. 1 and 2, one rib 40 is disposed on the center line 31 of each spoke portion 30 when viewed from the axial direction of the vehicle wheel 1. The spoke portions 30 and the ribs 40 correspond one to one. The spoke portions 30 and the ribs 40 corresponding to each other are connected to each other through the joint portion 28 between the side portions 27 of the continuous wall 24. Further, when viewed from the axial direction of the vehicle wheel 1, the center lines 33 of the pair of spoke pieces 32 intersect on the rib 40.

In the vehicle wheel 1 configured as described above, the load input to the rim 10 is transmitted to each spoke portion 30 and is directly transmitted from each spoke portion 30 to the corresponding rib 40. Therefore, even if a lateral load is applied to the vehicle and a bending stress acts on the spoke portion 30, it is possible to prevent or suppress the twisting from acting on the continuous wall 24 and improve the rigidity and durability of the vehicle wheel 1. In addition, when the center line 33 of each spoke piece 32 intersects with the rib 40, the load input to the rim 10 is directly transmitted to the rib 40 through each spoke piece 32. Therefore, the rigidity and durability of the vehicle wheel 1 can be further improved.
Further, a part of the load transmitted from the rim 10 to each spoke part 30 is transmitted from the joint part 28 to the spoke part 30 to the joint parts 28 adjacent to each other in the circumferential direction through two linear side parts 27. The Since the side portion 27 is linear, the force transmission efficiency is good. Therefore, the rigidity and durability of the vehicle wheel 1 can be further improved.
Since the pair of spoke pieces 32 having a V shape are joined to the joint portion 28 between the side portions 27 of the continuous wall 24, the driving force of the vehicle can be effectively transmitted to the rim 10 and the vehicle wheel 1 can be twisted. Stiffness can be improved.
Since the spoke piece 32 is joined to the side portion 27 via the R-shaped connection portion 35, the stress concentration at the joint portion can be reduced, and the durability of the vehicle wheel 1 can be further improved.
Further, as shown in FIG. 2, by forming the side portion 27 into a gentle concave curved shape that is recessed toward the center portion in the radial direction of the vehicle wheel 1, an R-shaped connection portion between the spoke portion 30 and the side portion 27. The stress concentration at 35 can be reduced, and the durability of the vehicle wheel 1 can be improved.
Since the spoke piece 32 is substantially perpendicular to the tangent line of the rim 10 at the joint portion with the rim 10, the load can be reliably transmitted, and the rigidity and durability of the vehicle wheel 1 can be further improved.

Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are attached to the drawings for the same configurations as those already described, and the description thereof is omitted.
FIG. 5 shows a second embodiment of the present invention. In the second embodiment, the spoke part 30 is configured by a single spoke instead of the twin spoke of the first embodiment. The spoke portion 30 made of a single spoke extends straight along the radial direction of the vehicle wheel 1. Center lines 31 of the plurality of spoke portions 30 intersect in the hub hole 25 at the center in the radial direction of the vehicle wheel 1. Ribs 40 are aligned with the spoke portions 30 in a straight line in the radial direction of the vehicle wheel 1.

  FIG. 6 shows a third embodiment of the present invention. In 3rd Embodiment, it replaces with the polygonal shape of 1st Embodiment, and the continuous wall 24 is a perfect circular cylinder shape. Therefore, the side portion 27 has a convex curve shape in which the central portion is convex toward the outer peripheral side in the radial direction of the vehicle wheel 1.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
The number of ribs 40 may be greater than the number of spoke portions 30. The rib 40 may correspond to each spoke part 30 one by one, and the remaining rib 40 may be arranged at a position not corresponding to the spoke part 30.
A plurality of embodiments may be combined with each other. For example, you may make the continuous wall 24 of the vehicle wheel 1 which has the single spoke of 2nd Embodiment into a perfect circle shape like 3rd Embodiment.

DESCRIPTION OF SYMBOLS 1 Vehicle wheel 10 Rim 20 Disc 21 Hub attachment part 23e Recess 24 Continuous wall 25 Hub hole 26 Bolt hole 27 Side part 28 Joint part 30 Spoke part 31 Center line 32 Spoke piece 33 Center line 34, 35, 36 R of spoke piece Part 40 Rib 41 Center line

Claims (3)

In a vehicle wheel having a rim and a disk,
The disc includes a hub attachment portion disposed at a central portion in the wheel radial direction of the disc, and a plurality of spoke portions extending radially outward from the hub attachment portion in the wheel radial direction,
The hub mounting portion includes an annular continuous wall formed on an outer peripheral portion of the hub mounting portion, a hub hole disposed at a central portion in the wheel radial direction of the disk, and the hub hole between the hub hole and the continuous wall. A plurality of bolt holes arranged at intervals in the circumferential direction of the wheel, and ribs formed between the adjacent bolt holes;
One of the ribs is disposed on a center line of each of the spoke portions in the radial direction of the wheel.   The spoke part is a twin spoke having a pair of spoke pieces, and when viewed from the wheel axial direction, each wheel radial center line of the pair of spoke pieces intersects on the rib. The vehicle wheel according to claim 1.   3. The vehicle wheel according to claim 1, wherein the continuous wall between the adjacent spoke portions has a linear shape or a concave curved shape that is recessed toward the center in the wheel radial direction.

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