JP2010018100A - Laterally-installed wheel rim structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laterally-installed wheel rim structure that prevents falling off and rotation of a side ring and that is easily assembled. <P>SOLUTION: The rim structure includes a cylindrical rim body 10 having a first flange 11, and a side ring 20 including a second flange 21. The rim body 10 has, on a circumference of a side edge thereof, a plurality of first locking recesses 15 that are formed in a circumferential direction at certain intervals. The side ring 20 has second locking recesses 25 that are formed in the circumferential direction at certain intervals so as to correspond to the first locking recesses 15. A plurality of locking pieces 30 are placed outside the side ring 20 in a width direction of the rim body 10, and are fitted into the first locking recesses 15 so that each locking piece 30 cannot move either in the circumferential direction or the width direction and also fitted into the second locking recesses 25 so that each locking piece 30 cannot move in the circumferential direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a side-loading wheel rim structure in which a structure for attaching a side ring to a rim body is improved.

  A side-loading wheel rim structure including a rim body and a side ring that are separate from each other is known. In this rim structure, the first flange portion is formed on one of both side edges in the width direction of the rim body, and the side ring includes the second flange portion. The tire is loaded on the outer periphery of the rim body by moving laterally while being substantially coaxial with the rim body. After the tire is loaded, the side ring is mounted on the outer periphery of the other side edge of the rim body. In the side ring mounted state, the pair of bead portions of the tire are prohibited from moving in the width direction by hitting the first and second flange portions facing the width direction of the rim body.

In the above-described lateral loading type rim structure, tire loading is easy, but it is required to mount a side ring that is separate from the rim main body without dropping from the rim main body during traveling.
Therefore, for example, in the rim structure disclosed in Patent Document 1, an annular lock groove is formed on the outer periphery of the other side edge of the rim body, and a lock ring made of C-shaped spring steel is formed in the lock groove. The side ring is prevented from falling off by fitting.

Furthermore, in patent document 1, the rotation of the side ring in the circumferential direction is also prohibited. That is, first engagement portions that are alternately uneven in the circumferential direction are formed in the side ring mounting region on the outer periphery of the rim body, and second engagement portions that are alternately uneven in the circumferential direction are formed on the inner periphery of the side ring. Therefore, the rotation of the side ring is prohibited by the meshing of the first and second engaging portions.
Further, for example, in the rim structure of a lateral loading type wheel disclosed in Patent Document 2, the wheel ring direction engagement between the side ring and a convex portion formed on one side of the rim body and a concave portion formed on the other side is described above. A side ring is fixed to the rim body, thereby preventing the side ring from falling off.
Furthermore, in Patent Document 2, the side ring is fixed to the rim body by screws or bolts, thereby preventing the side ring from rotating in the wheel circumferential direction.
JP 2006-335089 A JP 2001-191702 A

However, in Patent Document 1, when the lock ring is mounted in the lock groove of the rim main body, it is necessary to elastically deform with a strong force to once widen the diameter, and workability is poor.
Moreover, in the said patent document 2, since the rotation prevention to the wheel circumferential direction of the said side ring was hold | maintained only with the bis | screw and the volt | bolt, reliability was not enough. In addition, the side ring and the convex portion formed on one side of the rim main body are engaged with the concave portion formed on the other side in the wheel axial direction, and the side ring is fixed to the rim main body by screws or bolts. Therefore, workability was bad.

  In order to solve the above-described problems, the present invention provides (a) a rim body having a cylindrical shape and having a first flange portion formed on one of both side edges in the width direction, and (a) a separate body from the rim body. And a side ring that includes a second flange portion and is attached to the outer periphery of the other side edge portion of the rim body. A plurality of first lock recesses are formed on the outer periphery at intervals in the circumferential direction, and a plurality of second lock recesses corresponding to the first lock recesses are formed on the side ring at intervals in the circumferential direction. The second lock recess opens to the inner peripheral side of the side ring and opens to face the outer side in the width direction of the rim main body, and further to the outer side in the width direction of the rim main body from the side ring. Has multiple locking pieces, Lock piece, with fitted in the width direction immovable of the circumferential immovable and rim body in a first locking recess, characterized in that fitted into the second locking recess in the circumferential direction immovable.

According to the above configuration, since the side ring is prohibited from moving outward in the width direction of the rim body via the lock piece, it can be reliably prevented from falling off the rim body.
Further, since the side ring prohibits the rotation of the rim body in the circumferential direction via the lock piece, torque transmission from the rim structure to the tire can be reliably performed.
In addition, since a plurality of lock pieces can be inserted into the first and second lock recesses without elastic deformation, the structure for preventing the side ring from falling off and preventing rotation can be assembled with good workability. Can do. Further, since the side ring is prevented from rotating by fitting the first lock recess, the second lock recess, and the lock piece, the reliability is improved as compared with the rotation prevention by the bolt.

Preferably, the first and second lock recesses extend in the circumferential direction, and the lock piece extends in the circumferential direction to form an arc shape.
According to this configuration, since the lock piece extends in the circumferential direction to form an arc shape, the lock function in the width direction of the rim body with respect to the side ring can be exhibited in a wide angle range.

Preferably, the side ring has a radial engagement portion, and the radial engagement portion presses the lock piece while the lock piece is fitted in the second lock recess, and the lock piece is the rim body. It is forbidden to move outward in the radial direction.
Accordingly, the radial movement of the lock piece can be prohibited, and the lock piece can be prevented from falling off from the rim body.
More preferably, the radial direction latching | locking part of the said side ring contains the collar part which covers the outer peripheral side of the said 2nd lock recessed part.

  Preferably, the rim body, the side ring, and the lock piece are made of aluminum. According to this, the rim structure can be reduced in weight, and electrolytic corrosion between components can be prevented.

  According to the present invention, it is possible to reliably prevent the side ring from falling off from the rim main body, and it is possible to reliably perform torque transmission from the rim structure to the tire by prohibiting the rotation of the side ring. In addition, since a plurality of lock pieces can be inserted into the first and second lock recesses without elastic deformation, the structure for preventing the side ring from falling off and preventing rotation can be assembled with good workability. Can do. Further, since the side ring is prevented from rotating by fitting the first lock recess, the second lock recess, and the lock piece, the reliability is improved as compared with the rotation prevention by the bolt.

  Hereinafter, the rim structure of the aluminum wheel for small vehicles which makes 1st Embodiment of this invention is demonstrated, referring FIGS. 1-4. As shown in FIG. 1D, the wheel rim structure 1 includes a rim body 10, one side ring 20 that is separate from the rim body 10, and four (a plurality of) lock pieces 30. Yes. The rim body 10, the side ring 20, and the lock piece 30 are all made of an aluminum alloy (made of aluminum).

  As shown in FIG. 2, the rim body 10 has a cylindrical shape, and is continuous with a disk (not shown) by, for example, aluminum casting. The rim body 10 may be connected separately from the disk.

As shown in FIG. 1D, an annular first flange portion 11 protrudes radially outward from one side edge portion of both side edge portions in the width direction of the rim body 10. It is integrally formed.
An annular region extending from the side edge of the other rim body 10 (the side without the first flange portion 11) to a predetermined width is provided as a region 12 for mounting the side ring 20 (hereinafter referred to as a side ring mounting region). Is done.

  In the outer periphery of both side edge portions of the rim body 10, the rim body 10 is adjacent to the first flange portion 11 and the side ring mounting region 12, and inward in the width direction of the rim body 10 from the first flange portion 11 and the side ring mounting region 12. The annular region located is provided as a bead seat part 13.

  As shown in FIGS. 2 to 4, in the side ring mounting region 12, the side edge of the rim body 10 (side without the first flange portion 11) is separated by a short distance inward in the width direction of the rim body 10. Four (plural) first lock recesses 15 extending in the circumferential direction are formed in the annular narrow region at intervals in the circumferential direction. The circumferential length and width of the first lock recess 15 are equal to each other. A portion from the first lock recess 15 to the side edge of the rim body 10 is provided as an axial locking portion 15a, and a portion between the first lock recesses 15 and 15 is provided as a circumferential locking portion 15b. .

As shown in FIGS. 1D and 3, a portion of the side ring 20 that faces the first flange portion 11 and the rim body 10 in the width direction is provided as a second flange portion 21.
As shown in FIGS. 2 to 4, four (a plurality of) second lock recesses 25 extending in the circumferential direction corresponding to the first lock recesses 15 are formed in the side ring 20 at intervals in the circumferential direction. Has been. The second lock recess 25 opens to the inner peripheral side of the side ring and opens to the outer side in the width direction of the rim body 10.
The outer peripheral side of the second lock recess 25 (the radially outward direction of the rim body 10) is covered with a flange 25a (radial locking portion), and the portion between the second lock recesses 25, 25 It is provided as a direction locking part 25b.

  The lock piece 30 is formed of an arc-shaped flat plate, and the first and second lock recesses 15 and 25 have circumferential lengths corresponding to the fitting portions of the lock piece 30 into the first and second lock recesses 15 and 25, respectively. And have a width. The radius of curvature of the inner periphery of the lock piece 30 is equal to the bottom surface of the first lock recess 15, and the radius of curvature of the outer periphery is equal to the inner peripheral surface of the flange 25a.

  As shown in FIGS. 1 and 3, the lock piece 30 is positioned on the outer side in the width direction of the rim main body 10 with respect to the side ring 20, and an inner peripheral portion 30 a (a portion on the inner side in the radial direction of the rim main body 10). Is fitted into the first lock recess 15 of the rim body 10, and the outer peripheral portion 30 b (the radially outer portion of the rim body 10) is fitted into the second lock recess 25 of the side ring 20.

  As shown in FIG. 1D, the tire 40 to be loaded on the rim structure 1 has a substantially U-shaped cross section, a tread portion 41, and a pair of bead portions 42 disposed on both sides of the tread portion 41. And have. In a state where air pressure is supplied to the tire 40, the inner circumference of the pair of bead portions 42 hits the bead seat portion 13 of the rim body 10, and the outer surface in the width direction of the beat portion 42 is the first and second flange portions. The tire 40 is supported by the rim structure 1 by hitting 11 and 21.

  The side ring 20 always receives axial pressure (the width direction of the rim main body 10) from the tire 40, but the lock piece 30 locks the side ring 20 in the axial direction, and the lock piece 30 is the rim main body 10. The side ring 20 can be prevented from falling off from the rim body 10 by being fitted into the first lock recess 15 and being locked by the axial locking portion 15a.

  Further, the inner peripheral portion 30 a of the lock piece 30 is fitted into the first lock concave portion 15 of the rim body 10, and both circumferential ends thereof are engaged with the circumferential locking portions 15 b positioned at both ends of the first lock concave portion 15. The outer peripheral portion 30b of the locking piece 30 is fitted into the second lock concave portion 25 of the side ring 20, and both circumferential ends thereof are positioned at both ends of the second lock concave portion 25. Rotating the side ring 20 with respect to the rim body 10 is prohibited. As a result, torque can be reliably transmitted from the wheel to the tire 40, and the reliability can be improved as compared with the conventional rotation prevention by screws or bolts.

  The arc-shaped lock piece 30 does not have a self-holding function with respect to the rim main body 10 unlike the conventional C-ring lock ring made of spring steel, but the outer peripheral side of the second lock recess 25 of the side ring 20 is not provided. Since it is pressed down by the covering collar 25a, the movement in the radial direction is prohibited, and it is possible to prevent the rim body 10 from falling off.

  As described above, since the side ring 20 is applied with the axial force from the tire 40 and hits the lock piece 30, the flange portion 25 a of the side ring 20 does not come off from the lock piece 30. It is possible to reliably prevent the rim body 10 from falling off.

In the present embodiment, the lock piece 30 is not required to have spring elasticity like a C-ring shaped lock ring, as will be described later. Therefore, when the wheel including the rim body 10 is made of aluminum, the side ring 20 and the lock piece 30 can be made of aluminum in accordance with the wheel, and electrolytic corrosion can be prevented.
In this embodiment, since the bolt or the like is not used, the appearance is also excellent.

  Next, the operation of loading the tire 40 on the rim structure 1 will be described in the order of steps. First, as shown in FIG. 1 (A), the tire 40 is loaded on the outer periphery of the rim body 10 by being laterally moved in the axial direction in a state of being substantially coaxial with the rim body 10 (lateral loading). In the tire 20, a pair of bead portions 42, 42 are seated on the bead seat portions 13, 13, and one bead portion 42 hits the first flange portion 11 formed on one side edge of the rim body 10. Thus, the rim body 10 is supported on the outer periphery.

  Next, as shown in FIG. 1B, the side ring 20 is fitted to the outer periphery of the other side edge of the rim body 10 and the other bead portion 42 of the tire 40 is deformed while the side ring 20 is deformed. Push inward in the width direction.

Next, as shown in FIGS. 1B and 1C, the lock piece 30 is fitted into the first lock recess 15 from the outside in the radial direction of the rim body 10, and thereafter, as shown in FIG. Then, the side ring 20 is moved in the width direction of the rim body 10 and returned to the side ring mounting region 12, and the second lock recess 25 is fitted into the lock piece 30. The side ring 20 is moved in the width direction by the elastic restoring force of the bead portion 42 of the tire 40, but may be assisted by the air pressure injected into the tire 40.
As described above, when the lock piece 30 is mounted, workability is good because it does not have to be elastically deformed and spread as in the case of using a C-ring shaped lock ring.

Next, another embodiment of the present invention will be described. In these other embodiments, components corresponding to the preceding embodiment are given the same numbers, and only features that are different from the preceding embodiment will be described.
In the first embodiment, the flat plate-like lock piece 30 is used, but lock pieces 30 having various cross-sectional shapes as shown in FIGS. 5A to 5D may be used.

5A has an L-shaped cross section. The inner peripheral portion 30a of the lock piece 30 has an axial dimension larger than that of the outer peripheral portion 30b, and extends from the outer peripheral portion 30b to the inner side in the width direction of the rim body 10. Accordingly, the first lock recess 15 is wide.
In the embodiment of FIG. 5 (A), the inner peripheral portion 20c of the side ring 20 is provided as a radial locking portion that presses against the inner peripheral portion 30a of the lock piece 30, so the flange portion 25a may be omitted.

The lock piece 30 of FIG. 5B has a cross-sectional key shape (or Z shape), and the outer peripheral portion 30b is biased outward in the width direction of the rim body 10 with respect to the inner peripheral portion 30a. A portion of the outer peripheral portion 30b adjacent to the inner peripheral portion 30a is thick, and the side of the side ring 20 is an inclined surface 30x. The second lock recess 25 is formed with an inclined surface 25x that contacts the inclined surface 30x.
In the embodiment of FIG. 5 (B), since the inclined surface 25x is provided as a radial engagement portion that holds the lock piece 30, the flange portion 25a may be omitted.

In the embodiment of FIG. 5B, the surface contact of the inclined surfaces 25 x and 30 x converts a part of the axial force applied to the side ring 20 into a radially inward force on the lock piece 30. be able to.
Further, since the outer peripheral portion 30b of the lock piece 30 can be positioned on the radially outer side of the axial locking portion 15a of the rim main body 10, the step S between the side edge portion in the width direction of the rim main body 10 and the lock piece 30. Can be reduced or eliminated, and the appearance is improved.

5 (C) is similar to FIG. 5 (B), but the outer peripheral portion 30b is thick, and the side ring 20 is thin accordingly.
The lock piece 30 in FIG. 5D is lower and the axial dimension is larger than the lock pieces 30 of the other embodiments.

  In the embodiment of FIG. 6, an O-ring 50 is interposed between the side ring 20 and the rim body 10 to improve the air sealability. This configuration can also be applied to the embodiments of FIGS.

7A to 7F show an embodiment in which a reinforcing bolt 60 is added to the above-described embodiment.
In the embodiment shown in FIGS. 7A, 7 </ b> B, and 7 </ b> C, the outer peripheral portion 30 b of the lock piece 30 is connected to the side ring 20 by the reinforcing bolt 60. According to this, the lateral movement of the side ring 20 is prohibited without depending on the tire pressure, and as a result, the lock piece 30 can be prevented from falling off.
In the embodiment shown in FIG. 7D, the side ring 20 is fixed to the rim body 10 by the reinforcing bolt 60, and the side ring 20 is prohibited from moving in the width direction.
In the embodiment shown in FIGS. 7E and 7F, the lock piece 30 is fixed to the rim body 10 by the reinforcing bolt 60.

The present invention is not limited to the above embodiment, and various aspects can be adopted.
The side ring may have a bead seat portion that is integral with the second flange portion. In this case, it is necessary to interpose an O-ring between the side ring and the rim body.
The number of lock pieces may be two or three, or five or more.
The present invention can also be applied to a wheel rim structure of a large vehicle. In this case, the parts constituting the rim structure may be made of steel.

(A)-(D) are sectional drawings which show the wheel rim structure which makes 1st Embodiment of this invention in order of a tire loading process. It is a disassembled perspective view of the principal part of the rim structure. It is a perspective view which shows the principal part of the assembly completion state of the same rim structure in a partial cross section. It is a disassembled side view of the principal part of the rim structure. (A)-(D) are principal part sectional drawings which show other embodiment using the lock piece from which cross-sectional shape differs, respectively. It is principal part sectional drawing which shows other embodiment using an O-ring. (A)-(F) are principal part sectional drawings which show the other embodiment using a reinforced bolt, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rim main body 11 1st flange part 15 1st lock recessed part 20 Side ring 21 2nd flange 20c Inner peripheral part (radial direction latching | locking part)
21 2nd flange part 25 2nd lock recessed part 25a collar part (radial direction latching part)
30 Lock piece 30a Inner peripheral part (diameter inside part)
30b Outer periphery (radially outer part)
40 tire 42 bead part

Claims (5)

(A) a rim body having a cylindrical shape and having a first flange portion formed on one of both side edges in the width direction;
(A) A side ring that is separate from the rim body and includes a second flange portion, and is attached to the outer periphery of the other side edge of the rim body;
In the side-loading wheel rim structure with
On the outer periphery of the other side edge of the rim body, a plurality of first lock recesses are formed at intervals in the circumferential direction,
A plurality of second lock recesses corresponding to the first lock recesses are formed in the side ring at intervals in the circumferential direction,
The second lock recess opens to the inner peripheral side of the side ring and opens to face the outer side in the width direction of the rim body,
Further, a plurality of lock pieces are arranged on the outer side in the width direction of the rim body from the side ring, and each lock piece fits in the first lock recess so as not to move in the circumferential direction and not to move in the width direction of the rim body. A laterally loadable wheel rim structure that fits in the second lock recess so as not to move in the circumferential direction.   The laterally-loading wheel rim structure according to claim 1, wherein the first and second lock recesses extend in the circumferential direction, and the lock piece extends in the circumferential direction to form an arc shape.   The side ring has a radial locking portion, and the radial locking portion presses the lock piece while the lock piece is fitted in the second lock recess, and the lock piece is in the radial direction of the rim body. The laterally-loading wheel rim structure according to claim 1 or 2, characterized in that it is prohibited from moving outward.   4. The laterally loadable wheel rim structure according to claim 3, wherein the radial locking portion of the side ring includes a flange portion that covers an outer peripheral side of the second lock recess.   The laterally loadable wheel rim structure according to any one of claims 1 to 4, wherein the rim body, the side ring, and the lock piece are made of aluminum.

Images