JPS62225401A - Disk wheel for car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc wheel for a vehicle, and more particularly to a disc wheel for a vehicle, comprising: a rim; a disc fixed to the rim; Flat mounting refers to disc wheels that present flanges.

Known disc wheels having the above-mentioned configuration include a so-called 15' drop center type wheel and a 5° flat base type wheel having a side ring and a disc welded to the inside of the bottom.

Known disc wheels with separate side rings, as described for example in DE 21 34 485 A1, have the following disadvantages. In other words, if the tires are installed incorrectly, a dangerous accident may occur. moreover,
Mechanical damage may occur and the safety of the pneumatic rim may be compromised. Also, multiple parts are required and each part can be confused with parts of the same size intended for the same type of rim.

Vehicle wheels with removable rims are also known, as described for example in Swiss Patent No. 175,208. In this known construction, a removable rim is connected to the wheel body by means of bolts and a clamping plate. In this type of so-called Trilex wheel,
Due to the separation or expansion of the coupling separation position in the front clamping area, no means are provided for fixing the coupling surfaces geometrically.

In view of the above-mentioned prior art, an object of the present invention is to propose a disc wheel that allows tires to be mounted quickly, easily and safely without any trouble using the minimum necessary parts.

To achieve this object, the present invention provides a disc wheel having a divided structure consisting of three circumferential disc wheel segments; the disc wheel segments are arranged adjacent to each other at a circumferential joining surface. the coupling surfaces of the disc wheel segments are shaped to engage each other in the rim region; the disc wheel segments have opposing end faces in the disc region that are spaced apart from each other by a predetermined distance; and a slot extending from the rim region to the centering hole in the inner periphery is formed between the opposing end surfaces.

The disc wheel according to the invention comprises three disc wheel segments configured and arranged as described above, so that in the 5° flat base format, the disc wheel has a 15°
Tires, whether drop center or not, can be mounted on the rim quickly, easily and safely without any hindrance, and the segments are reliably joined without the need for additional joining means. It is possible to do so.

Hereinafter, the present invention will be explained with reference to the drawings.

1 and 2 show a disc wheel 1 according to an embodiment of the invention, which wheel is divided circumferentially and comprises three disc wheel segments Ia, lb, Ic. It is growing. The disc wheel 1 in this example further comprises a rim provided with a flat bottom having an inclination angle of 5° with respect to the wheel axis, and a disc 3 as a wheel member. This disc is connected to the bottom 4 of the rim 2, in particular to the transition region of the bottom 4 to the adjacent side flanges 5, by suitable joining means such as welding.

The disc 3 has a substantially flat mounting flange 6 and a curved or arcuate transition 7 that connects to the rim 2 . For attachment, the flange 6 is provided with a centering hole 8 and a bolt hole or opening 9 for passing a bolt through. As shown in FIG. 2, these bolt holes 9 are arranged at substantially the same pitch on a predetermined circumference, that is, at substantially equal intervals from each other. The disc wheel 1 is fixed to the center of a wheel hub or brake drum 10 with a normal bolt inserted through a bolt hole 9. In the illustrated example, the flange 6 is mounted at a position offset from the center of the rim 2 such that the so-called inset 11 is larger than 1/2 of the width of the rim 2. The bottom is 5° to the wheel axis
A rim 2 of the so-called flat base type, with an inclination angle of , is suitable for use in combination with a tire with a tube.

3 disc wheel segments la, lb.

The lcs are arranged in the assembled state so that they touch each other at the joining surfaces 12, 13 in the bottom region of the bar 2, as is clearly shown in FIG. These joining surfaces 12.13 are connected to the three segments (la, lb) in the disc wheel 1.
, lc to each other in the radial and axial directions. As is clear from Figure 2, especially segment 1
contact bonding surface 12 between a and segments l-1b, lc.
13 is formed into a substantially ■-shape. The manner in which these three segments 1a, Ib, and Ic are connected to each other is disclosed, for example, in Swiss Patent No. 444692 and Swiss Patent No. 324960 owned by the present applicant.

mutually adjacent segments) la.

Opposite end surfaces 14a in the area of the disk 3 of lb and Ic
, 14b are spaced apart from each other to form a slot 15. Each slot 15 extends radially from the circumferential joining surface 12.13 of a substantially identical or similarly shaped rim 2 divided according to the arrangement pattern or number of bolt holes 9 or relative to the diametrical line 17. It is tilted by a predetermined angle and extends to the centering hole 8. This centering hole 8
A dome-shaped portion 19 for reducing stress is formed on the end faces 14a, 14b of the segments spaced apart from each other in the region.

The width 16 of each slot 15 is determined by the disc wheel segment la in order to accommodate the tire without any problems.

lb and lc are pushed in in the circumferential direction and set to values that allow the segment to be successively inserted into the inner diameter area of the tire. Second
In the embodiment shown, ten bolt holes 9 are formed, and all slots 15 are arranged at an acute angle to the diameter line 17. Some of the slots 15 have a bend 21 on the inner end side, which results from the need to evenly distribute the material in the area of the bolt hole 9.

As already mentioned above, in the area of the side flanges 5 and the rim flange 20, the connecting surfaces 12.13 are substantially square-shaped with respect to each other, so that in the assembled state the disc wheel segments Ia, lb.

1c are mutually positively connected in the radial and axial directions. This results in the rim 2 and thus the disc wheel 1 forming a self-supporting structure in the assembled state. As shown in FIG. 5, one disc wheel segment, in this example segment la,
2 has a recess or opening 18 through which the tire pulp passes.

According to the split disc wheel 1 having the above-described configuration,
It is possible to install or remove tires very easily. The required operations can be carried out similarly using the same tools as in the case of so-called Trilex wheels, but no additional assembly operations with wheel spiders are required and only fewer parts are required.

FIG. 3 shows a modification of the coupling structure between the rim 2 and the disc 3 as a wheel member. In this example, the disc 3 is connected directly to the arcuate transition region 7a at the side edge of the rim 2 to form the rim flange 20. It is desirable that the arcuate transition portion 7a has a substantially parabolic shape. According to this example, the entire disc wheel 1 is first formed by press roll forming a metal plate such as a steel plate, and then
It can be manufactured by dividing into three segments. In other respects, the embodiment of FIG. 3 corresponds in construction to that shown in FIG.

FIG. 4 shows a modification of the embodiment of FIG. 3, in which the rim 2 is designed as a so-called 15° drop center rim. Also in this example, the rim flange 20
The rim flange 20 is arranged on a shoulder 22 inclined at 15° with respect to the wheel axis, while the rim flange 20 directly connects the disc 3 to the wheel at an arcuate transition region 7a. A so-called run flat ring insert 31, which enables running in the event of a puncture, is arranged between the bead portions of a tire 30 mounted on a rim 2. Furthermore, the ribs 23 arranged on the bottom 4 of the rim engage with the grooves 32 of said ring insert 31 to form torque protection means of said ring insert 31. That is, by engaging the ribs 23 and the grooves 32, torque can be transmitted between the ring insert 31 and the 15° drop center rim 2. This 15° drop center rim 2 is suitable for use in combination with a tubeless tire and a conventional seal band (not shown). In addition, the above seal band is 15
'It is placed on the drop center rim.

6 to 8 show embodiments in which the bolt hole arrangement pattern of the flange 6, and therefore the number of bolt holes 9, are different from the structure shown in FIG. 3 or 4. Due to the above-mentioned differences in the mounting flange, the form of the slot 15 also changes as shown in FIGS. 6 and 7, for example. That is, the two slots 15 form an acute angle with respect to the aforementioned diameter line 17 (see FIG. 2),
The remaining slot 15 extends in the radial direction. On the other hand, in the embodiment shown in FIG. 8, the arrangement pattern of six bolt holes 9 allows three slots 1-1
It is possible for all of 5 to extend radially.

The embodiment of the disc wheel shown in FIGS. 1, 3 and 4 can be manufactured, for example, by welding steel plates together to form segments. Disc wheel segments can also be formed by forging or casting. In the case of casting, it is desirable to use a carbon-iron alloy or an aluminum alloy containing particles of Krafay 1.

All of the disc wheels having a three-part structure according to the embodiments described above can be used not only for a single tire but also for a double tire in which a pair of discs are stacked back to back.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a disk wheel with a three-part structure according to an embodiment of the present invention, FIG. 2 is a side view of the disk wheel shown in FIG. 1, and FIG. 3 is a modification of the disk wheel shown in FIG. 1. 4 is a sectional view showing a modified example of the disk wheel in FIG. 3, FIG. 5 is a partial plan view taken from the direction of arrow B in FIG. 2, and FIG. 6 is a cross-sectional view showing a modification of the disc wheel in FIG. FIG. 7 is a side view showing a modification of the disc wheel shown in FIG. 6, and FIG. 8 is a side view showing another modification of the disc wheel shown in FIG. 6. 1... Disc wheel la, lb, lc... Segment 2... Rim 3... Disc 4... Rim bottom 5... Side flange 6
...Mounting flange 7...4% Hill part 8...
Centering hole 9...Bolt hole 12.13-...
Joining surfaces 14a, 14b...End face 15...Slot 18...Four parts 20...Rim flange
23...Rib 31...Ring insert 32...Groove Patent applicant Georg Fischer Akchengesellshaft

Claims (1)

[Claims] 1. A disc wheel for a vehicle, comprising: a rim; a disc fixed to the rim; the disc has a substantially flat shape with bolt holes and centering holes formed on the inner periphery; a mounting flange; the disc wheel has a split structure consisting of three circumferential disc wheel segments; the disc wheel segments are arranged adjacent to each other at a circumferential joining plane; The coupling surfaces of the disc wheel segments are shaped to engage each other in the rim region; the disc wheel segments have opposing end faces in the disc region that are spaced apart from each other by a predetermined distance; A disc wheel characterized in that a slot is formed between the end faces, extending from the rim area to a centering hole in the inner circumference. 2. In the disc wheel according to claim 1: the mutually adjacent joining surfaces of at least one pair of disc wheel segments in the rim region have a substantially V-shape; A disc wheel characterized in that the disc wheel segments are fixed radially and axially. 3. A disc wheel according to claim 1, wherein each slot has a width that allows each disc wheel segment to be pushed into the disc wheel so that the tire can be easily mounted on the disc wheel. 4. In the disc wheel according to claim 1: each slot has a substantially constant width;
A disc wheel characterized in that the two slots have a bend portion extending toward the centering hole in the inner circumference. 5. In the disc wheel according to claim 1: the disc wheel segments are arranged at approximately equal intervals in the circumferential direction of the rim; each disc wheel segment includes a plurality of bolts arranged at a predetermined pitch. A disc wheel having holes; characterized in that the slots extend radially or in a direction oblique to the radial direction, depending on the pitch of the bolt holes. 6. A disc wheel according to claim 1, characterized in that the disc is connected to the rim in the bottom region of the rim. 7. Disc wheel according to claim 1, characterized in that the disc is directly connected to the outer end at the flange of the rim by a substantially arcuate transition region. 8. A disc wheel according to claim 7, characterized in that the substantially arc-shaped transition region is formed in a substantially parabolic shape. 9. Disc wheel according to claim 1, characterized in that one of the disc wheel segments has a recess in the bottom region of the rim for passing the valve of the tire. 10. The disc wheel according to claim 1, wherein the disc wheel segment is made of a cast body of a carbon-iron alloy mixed with graphite particles. 11. The disc wheel according to claim 1, wherein the disc wheel segment is made of a cast aluminum alloy. 12. The disc wheel according to claim 1, characterized in that the rim is of a flat base type with a bottom part inclined at 5 degrees with respect to the wheel axis for mounting a tire with a tube. disc wheel. 13. The disc wheel according to claim 1, wherein the rim is of a 15° drop center type for mounting a tubeless tire provided with a seal band. 14. A disc wheel according to claim 1, characterized in that the rim is provided with a run-flat ring insert, and a coupling means serving as a torque transmission means is arranged between the two run-flat ring inserts.