JPH09240203A - Assembly type wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent application of an axial load to a fastening bolt connecting a disc and a rim together when a cornering force and the like is applied to a wheel. SOLUTION: A ring type flange part 11 is arranged in the outer circumference part of a disc 1, and on the back side of the flange part 11, a recess groove 12 is arranged on the circumference of the disk 1. An engaging part 15 consisting of a plurality of projection pieces is arranged on the back side of the recess groove 12. In the engaging part 15 and the flange part 11, engaging holes for installing a fastening bolt 5 are arranged. A rim to be engaged with the disc 1 is constructed of an inner rim 2 arranged on the inside and an outer rim 3 arranged on the outside. A projection piece type engaging part 21 is arranged on the inside diameter part side of the inner rim 2. A projection piece type engaging part 31 is arranged on the inside diameter part side of the outer rim 3. In the engaging parts 21, 31, engaging holes for installing the fastening bolt 5 are arranged. The engaging parts 21, 31 are temporarily installed in the recess groove 12 of the disc 1 so as to be connected together by means of the fastening bolt 5 and a nut 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembly type wheel which is composed of a disc and a rim which are separate from each other and which are joined together by fastening bolts and nuts.

[0002]

2. Description of the Related Art Recently, tires used in passenger cars have been widened and flattened. The wheels on which the tires are mounted are being made of light alloys such as aluminum alloys. Also, in some of these aluminum alloy products (aluminum wheels), the disc portion and the rim portion of the wheel are formed separately, and these are fastened with fastening bolts, nuts, etc. Some are designed to be combined by means.

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention In the assembly type wheel in which the disc portion and the rim portion are formed separately and are joined together, the above-mentioned problem is caused when the vehicle corners. Wheel rim,
Also, a large force (cornering force) is applied to the joint portion between the rim portion and the disc portion. Then, in this case, a large axial force is applied to the fastening bolts provided in the engaging portion. By the way,
Since the fastening bolts that form these coupling portions are provided on the peripheral portion of the rotating body, they receive a large centrifugal force. Therefore, it is necessary to reduce the mass in order to minimize the effect. As a result, the diameter of the fastening bolt cannot be too large (large diameter). From these things, in the wheel used for the rally vehicle and other competitive vehicles, the structure of the engaging portion between the rim portion and the disc portion may be such that a large axial force is not applied to the fastening bolt. It is considered. It is an object (problem) of the present invention to provide an assembly type wheel in consideration of such a point.

[0004]

Means for Solving the Problems To solve the above problems, the present invention takes the following measures. That is, an assembly formed by a disc-shaped disc and a ring-shaped rim that is attached to the outer peripheral portion of the disc and is integrally formed by fastening bolts or the like. With respect to the wheel of the formula, while providing a flange portion on the outer peripheral portion of the disc, a recessed groove is provided on the circumference of the disc on the back side of the flange portion in a state where the disc is assembled as a wheel, Further, an engaging portion formed of a plurality of convex pieces, which is formed in parallel with the flange portion on the back side of the flange portion with the recessed groove sandwiched therebetween, is provided, while the rim is assembled as a wheel. In the above state, the disc is provided on the inner diameter side of the one provided inside the wheel (hereinafter referred to as the inner rim). A protrusion-shaped engaging portion formed to correspond to the protrusion-shaped engaging portion is formed, and further, a rim portion of the wheel is formed together with the inner rim, and in a state assembled as a wheel. On the inner diameter side of the one provided on the outside of the wheel (hereinafter referred to as the outer rim), there is provided a protruding piece-like engaging portion formed so as to form a pair with the engaging portion formed on the inner rim. In the recessed groove of the disc formed in the above, the convex-shaped engaging portion of the inner rim and the convex-shaped engaging portion of the outer rim are engaged with each other in a joined state, and then the flanges of these discs are engaged. The engaging portion, the engaging portion, and the engaging portion of the outer rim and the engaging portion of the inner rim are configured to be coupled with a predetermined fastening bolt and nut.

When assembling the disc and the rim having such a structure, first, the engaging portions of the outer rim and the inner rim are joined together to form a rim assembly. Then, in such a rim assembly, a convex piece portion formed by joining the above-mentioned respective engaging portions is brought close to the back side of the disc, and
The convex piece portion is inserted into a concave portion formed on the back surface side of the disk and formed between adjacent convex piece-shaped engaging portions. At the same time, the convex piece is passed through the outer peripheral portion of the disc and the concave portion formed on the back surface side thereof, and further, in such a state, the disc is Rotate in the circumferential direction (see Figure 1). As a result, the respective engaging portions of the outer rim and the inner rim are fitted into the recessed grooves provided on the outer peripheral portion of the disc, and these engaging portions are convex piece-shaped engagements formed on the back surface side of the disc. It will be engaged at the joint. Then, in such a state, the flange portion and the engaging portion of the disc,
Further, the outer rim and the inner rim, which are engaged with each other in the recess groove of the disc, are tightened with predetermined fastening bolts and nuts. As a result, the split type wheel is assembled.

When the wheel thus assembled is mounted on a vehicle and the vehicle makes a sharp turn, a large cornering force is input to the wheel through the tire. And
The force resulting from this cornering force largely acts on the outer wheels of the turning vehicle. In the present invention, the cornering force (F) is input from the tire to the inner rim (inner rim) as shown in FIG. 2, and the cornering force input to the inner rim (inner rim) is input. The force (F) is transmitted to the convex-shaped engaging portion and the flange portion formed on the outer peripheral portion of the disk via the convex-shaped engaging portion formed on the inner diameter side of the rim (inner rim). To be done.
That is, a large cornering force (F) generated when the vehicle makes a turning motion is transmitted to the engaging portion and the flange portion provided on the outer peripheral portion of the disc through the engaging portion of the inner rim. Become. As a result, the load is not directly applied (not input) to the fastening bolt connecting the rim and the disc. Therefore, a large axial force will not be input to the fastening bolt, and it is not necessary to prepare a large diameter bolt that can withstand a large axial force.
That is, the disc and the rim can be fastened with a small fastening bolt having a small shaft diameter.

Further, in the present invention, the protruding piece-like engaging portion formed on the inner diameter side of the inner rim is provided with the protruding piece-like engaging portion of the outer rim having the same configuration provided outside thereof. In addition, since it is adapted to be engaged through the flange portion of the disk having a ring shape provided on the outer side thereof, the inner rim convex piece shape attached in such a state The durability of the engaging portion will be further enhanced. That is, originally, at the engaging portion of the inner rim where the fastening bolt is attached, the repeated bending force in the board is input by the action of the cornering force. Due to the action of this repeated bending force, damage such as cracking may occur at the engaging portion of the inner rim. However, in the case of the present invention, when the repeated bending force is input, the portions shown in FIGS.
Since a ring-shaped flange portion as shown in Fig. 4 is provided, and the fastening bolt is attached through this flange portion, depending on the tightening of the fastening bolt to the engaging portion, , Stress concentration does not occur. That is, the force from the inner rim side is not directly input to the place where it comes into contact with the seat surface of the bolt head of the fastening bolt, so that stress concentration around the fastening bolt engagement hole of the engagement portion of the inner rim can be avoided. become. As a result, the durability strength around the engaging portion of the inner rim is increased.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. Although according to the embodiment of the present invention, as shown in FIG. 1, the rims 2 and 3 and the disk 1 are separate bodies, and these are integrated by a fastening bolt 5 and a nut 6. It is based on the fact that it consists of a prefabricated wheel formed by being joined to.

In such a structure, the disk 1
As shown in FIG. 1, it has a disc shape and is made of a light alloy such as an aluminum alloy. In addition, it is basically formed of such a disc shape, and a flange portion 11 having a brim shape is formed at the outer peripheral portion thereof. And this flange part 1
A recess groove 12 is provided on the back side of the disk 1 and on the circumference of the disk 1. Further, on the back surface side of the recess groove 12 and where the recess groove 12 is sandwiched, a protruding piece-shaped engaging portion 1 formed so as to correspond to the engaging portion 21 of the inner rim 2 described later.
5 are provided at equal intervals (equal pitch). Further, the rollers of the engaging portion 15 and the flange portion 11 are provided with a plurality of engaging holes 151 and 111 into which fastening bolts 5 to be described later are mounted, at equal intervals. Is.

The rims 2 and 3 which engage with the engaging portion 11 of the disc 1 having such a structure are made of a light alloy such as an aluminum alloy like the disc 1 and are used in the present embodiment. In the case of the above-mentioned form, as shown in FIG. 1, it is of a two-division type. Each of these two-part rims is arranged to be present on the outer side of the vehicle body (outer rim) 3 and the inner side of the vehicle body when they are assembled as wheels and mounted on the vehicle. The inner rim (inner rim) 2 is That is, a generally known three-piece wheel is formed. In addition, in the present embodiment, the configuration, action, and the like of the three-piece wheel will be mainly described, but regarding the technical contents thereof, a so-called two-piece wheel in which the outer rim and the inner rim are integrated is also described. The same can be said.

In such a structure, the inner rim 2 has a cylindrical shape, and has an end face on one side thereof, and an inner diameter side thereof has the disc as shown in FIGS. 1 and 2. A plurality of protruding piece-shaped engaging portions 21 that engage with the engaging portion 15 of No. 1 are provided so as to correspond to the engaging portion 15 of the disc 1. Then, at each of these engaging portions 21, a penetrating engaging hole 211 for mounting the fastening bolt 5 is provided. The engaging holes 211 are provided at equal intervals (equal pitch) so as to correspond to the engaging holes 111 and 151 provided in the flange portion 11 and the engaging portion 15 of the disc 1. It is what

The outer rim 3 which is integrally mounted with the inner rim 2 having the above-mentioned structure in the recess groove 12 of the disc 1 and which forms the outer rim when assembled as a wheel, As shown in FIG. 1, it has a ring-like shape, and when it comes into contact with the inner rim 2, it also has a convex piece-like shape so as to correspond to the engaging portion 21 of the inner rim 2. The joining portion 31 is provided. As shown in FIGS. 1 and 2, the engaging portion 31 has an engaging hole formed in the engaging portion 21 of the inner rim 2 and the flange portion 11 and the engaging portion 15 of the disc 1. Engagement holes 311 for mounting the fastening bolts 5 are provided so as to correspond to 211, 111, 151.

The fastening bolt 5 for integrally connecting the flange portion 11 and the engaging portion 15 of the disk 1 and the engaging portion 21 of the inner rim 2 and the engaging portion 31 of the outer rim 3 having the above-described structure is shown in FIG. As shown in FIG. 5, a seat portion (seat surface) 511 is formed at the head 51, and a screw portion 55 is formed at one end thereof. It is a thing. The nut 6 is attached to the screw portion 55. The disc 1, the inner rim 2, and the outer rim 3 are joined and integrated by the fastening bolts 5 and the nuts 6 as described above.

Next, an assembling procedure (assembling procedure) of the disc and the rim having such a structure will be described. First, as shown in FIG. 1, the engaging portions 31, 21 of the outer rim 3 and the inner rim 2 are joined together to form a rim assembly. Then, in such a state of the rim assembly, the convex piece formed by joining the engaging portions 21 and 31 is brought closer to the back side of the disc 1, and the convex piece is put on the back side of the disc 1. The engaging portions 15 and 1 that are formed on the side and are adjacent to each other
Insert into the recess 19 formed between 5 '. At the same time, the convex piece formed by joining the engaging portions 31 and 21 of the outer rim 3 and the inner rim 2 is formed on the outer peripheral portion of the disc 1 on the back surface side thereof. It passes through the above-mentioned recessed portion 19. Further, in such a state, the disc 1 is rotated by a predetermined amount in the circumferential direction (see FIG. 1). As a result, the engaging portions 31 and 21 of the outer rim 3 and the inner rim 2 are fitted into the recess grooves 12 provided on the outer peripheral portion of the disc 1, and the engaging portions 31 and 21 are attached to the disc 1. It also comes into engagement with the convex-shaped engaging portion 15 formed on the back surface side of the. Then, in such a state, the flange portion 11 and the engaging portion 15 of the disc 1, and further, the engaging portions 31 and 21 of the outer rim 3 and the inner rim 2 engaged in the recess groove 12 of the disc 1, respectively. Tighten the place with the fastening bolt 5 and the nut 6. As a result, the split type wheel is assembled.

Next, the operation and the like of the wheel thus assembled will be described. That is, when a vehicle equipped with such a wheel makes a sharp turn or the like, a large cornering force is input to the wheel through the tire. Then, the force resulting from the cornering force largely acts on the outer wheels of the turning vehicle. By the way, in the present embodiment, the cornering force (F) is input from the tire to the inner rim (inner rim) 2 as shown in FIG. 2, and the inner rim (inner rim) 2 is inputted. The cornering force (F) inputted to the rim (inner rim) 2 is a convex piece-shaped engagement formed on the outer peripheral portion of the disc 1 via a convex piece-shaped engagement portion 21 formed on the inner diameter side. It is transmitted to the portion 15 and the flange portion 11. That is, a large cornering force (F) generated during turning motion of the vehicle, etc.
Is an engaging portion 15 and a flange portion 11 provided on the outer peripheral portion of the disc 1 via the engaging portion 21 of the inner rim 2.
Will be transmitted to. As a result, the rims 2, 3
The load is not directly applied (not input) to the fastening bolt 5 connecting between the disk 1 and the disk 1. Therefore, a large axial force is not input to the fastening bolt 5, and it is not necessary to prepare the fastening bolt 5 having a large diameter capable of withstanding the large axial force. That is, with a small fastening bolt 5 having a small shaft diameter,
It becomes possible to fasten the disc 1 and the rims 2 and 3 together.

Further, in the present embodiment, the protruding piece-shaped engaging portion 21 formed on the inner diameter side of the inner rim 2 has the protruding piece-shaped engagement portion 21 of the outer rim 3 having the same shape on the outer side thereof. Since it is adapted to be attached to the outside of the fitting portion 31 via the flange portion 11 of the disc 1 having a ring shape, the mounting hole (engagement hole) 211 around the fastening bolt 5 is surrounded. The durability strength will be further enhanced. That is, originally, the repetitive bending force in the board is input at the engaging portion 21 of the inner rim 2 and where the fastening bolt 5 is attached by the action of the cornering force. Due to the action of this repeated bending force, damage such as cracking may occur at the engaging portion 21 of the inner rim 2. However, in the present embodiment, a ring-shaped flange portion 11 as shown in FIG. 1 and FIG. 2 is provided at a place where it comes into contact with the seat surface 511. Since the fastening bolt 5 is attached via the, the stress concentration or the like does not occur in the engaging portion 21 due to the fastening bolt 5 being tightened. That is, the force from the inner rim 2 side is the bearing surface 5 of the bolt head 51 of the fastening bolt 5.
No direct input will be made where it comes into contact with 11, and the force from the inner rim 2 side will be widely dispersed via the flange portion 11 provided on the disc 1. As a result, the durability strength around the engaging portion 21 of the inner rim 2 is increased.

[0017]

According to the present invention, a disc-shaped disk,
A disc-shaped wheel that is attached to the outer peripheral portion of the disc and has a ring-shaped rim, and these are integrally coupled by fastening bolts or the like. A flange portion is provided on the outer peripheral portion, and a recess groove is provided on the circumference of the disc on the back side of the flange portion when the disc is assembled as a wheel, and the recess groove is sandwiched. At the back side of the flange portion, provided with an engaging portion formed in parallel with the flange portion and consisting of a plurality of convex pieces, on the other hand, of the rim, inside the wheel in a state assembled as a wheel. What is provided (hereinafter referred to as "Innerim")
Of the inner rim of the wheel is provided with a convex-shaped engaging portion formed to correspond to the convex-shaped engaging portion provided on the disc, and a rim portion of the wheel is formed together with the inner rim. Which is provided on the outside of the wheel when assembled as a wheel (hereinafter referred to as the outer rim), is formed on the inner diameter side thereof so as to form a pair with the engaging portion formed on the inner rim. Providing a protruding piece-shaped engaging portion, and engaging the protruding piece-shaped engaging portion of the inner rim and the protruding piece-shaped engaging portion of the outer rim into the recessed groove of the disc thus formed, and after that Since the flange portion and the engaging portion of these discs, and the engaging portion of the outer rim and the engaging portion of the inner rim are configured to be coupled with a predetermined fastening bolt and nut, When a large load due to cornering force, etc. is input to the wheel, the force input from the rim side is transmitted from the rim side engagement portion to the disc engagement portion and the flange portion. Therefore, the force is not directly transmitted to the fastening bolts. As a result, tightening bolts, which have a large effect on centrifugal force when the wheel makes a rotational movement, have a small shaft diameter,
Therefore, it has become possible to reduce the mass. As a result, it has become possible to reduce the factors that cause the unbalanced mass of the wheel, and to cope with high-speed rotational movement.

Further, since the mass of the fastening bolt can be reduced, the mounting position of the fastening bolt can be set to the rim side as much as possible, and the length of the spoke portion of the wheel can be reduced. I can see it for a long time. In other words, the appearance of the entire wheel can be improved and its style can be improved.

Further, since the ring-shaped flange portion formed on the outer peripheral portion of the disk is engaged with the engaging portion of the rim, the force from the rim side is the bolt head of the fastening bolt. It has become possible to avoid inputting directly into a portion that comes into contact with, and to avoid stress concentration around the fastening bolt mounting hole (engaging hole) of the engaging portion of the rim. As a result, the durability of the engaging portion is improved, and the weight of the entire rim including the engaging portion can be reduced, which in turn can reduce the weight of the entire wheel.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the overall configuration of the present invention.

FIG. 2 is a sectional view showing a structure of an engaging portion of a disc and a rim according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 disk 11 flange part 111 engaging hole 12 recess groove 15 engaging part 15 'engaging part 151 engaging hole 19 concave part 2 inner rim 21 engaging part 211 engaging hole 3 outer rim 31 engaging part 311 engaging hole 5 fastening bolt 51 bolt head 511 seat (seat surface) 55 screw 6 nut

Claims (1)

[Claims] 1. A disc-shaped disc and a ring-shaped rim that is attached to an outer peripheral portion of the disc and is formed by integrally connecting these with a fastening bolt or the like. In the assembled wheel described above, a flange portion is provided on the outer peripheral portion of the disc, and a recess is formed on the circumference of the disc on the back side of the flange portion when the disc is assembled as a wheel. A groove is provided, and further, on the back side of the flange portion with the recess groove sandwiched therebetween, an engaging portion formed in parallel with the flange portion and formed of a plurality of convex pieces is provided, while one of the rims is provided. , The inner disc side of the one provided inside the wheel when assembled as a wheel (hereinafter referred to as the inner rim), to the disc A protrusion-shaped engaging portion that is formed so as to form a pair with the protrusion-shaped engaging portion that is provided, and further forms a rim portion of a wheel together with the inner rim, and is assembled as a wheel. In the state of being provided on the outer side of the wheel (hereinafter referred to as the outer rim), on the inner diameter side thereof, a protruding piece-shaped engaging portion formed to correspond to the engaging portion formed on the inner rim is provided, In the recess groove of the disc formed in this manner, engage the convex piece-shaped engaging portion of the inner rim and the convex piece-shaped engaging portion of the outer rim, and thereafter, the flange portion and the engaging portion of these disks, Also, a prefabricated wheel having a configuration in which an engaging portion of an outer rim and an engaging portion of an inner rim are coupled by a predetermined fastening bolt and nut.