JPH0234401A - Light metal wheel rim - Google Patents

Abstract

PURPOSE: To facilitate the manufacture of a light metal wheel rim consisting of two parts by forming a horn protruded radially outward on a transfer part where a wheel disc is integrated to a rim ring, and fixing an outside rim horn thereto by a screw. CONSTITUTION: This wheel rim 11 has a wheel disc 13 having a hub area 29, and a horn 33 branched from the upper side of a rim ring 14 is integrally formed in the transfer part to the rim ring 14 inclined to left from this disc 13. The horn 33 is formed so that the head part substantially reaches the height of the radial internal area of a gauge edge, and it has an end surface 42 flatly cut on the outside surface. The flat inner surface 56 of the flange 53 of an outside rim hone 17 is fitted to the end surface 42, and the rim horn 17 is firmly fixed by screwing a screw 46 to a plurality of screw bushes 48 provided on the horn 33 side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light metal wheel rim used mainly for automobiles.

[Prior Art] A wheel disc having one wheel disc, one rim ring, one inner rim horn, two outer rim horns, and a first wheel according to a first gauge circle of one inner rim reinforcement. 1 roundness, a second roundness corresponding to a second gauge circle of one rim reinforcement, an outer coupling-like bed surrounding the second roundness, and the bed substantially It forms not only the extension of the rim ring but also the extension of the wheel disc, and is manufactured by a molding method and has a deep annular radial flange, and this flange has a number of through holes, and this A wheel rim in which a screw is passed through the hole and which presses the flange against the radially outer annular end face of the wheel disc is known from precedents made known by the applicant. A partially similar wheel rim is also known from German Patent No. 2,824,972. In these wheel rims, the coupling bed is often forged, which is the preferred molding method, but the bed is also often press molded or pressure worked. In this case, a thermosetting forged alloy is used. The outer bed is never forged.

In contrast, the rim ring and/or the wheel disc can be forged and/or cast.

[Problems to be Solved by the Invention] One of the important dimensions for the design of a light metal wheel rim is the double gauge circle, which is actually a ring rather than a mortar. It only looks like a circle in cross section, the center of which is determined by the gauge. The gauge, along with the gauge circle, is predetermined by the tire manufacturer.8Furthermore, the rim horn has a specific predetermined shape that also takes into account the shape of the tire.

Inside the wheel rim, the space required by vehicle manufacturers for their brakes must be allowed for.

The bed cannot be cut out, as for example in the case of wheel discs (with the exception of cutouts for valve passages), but the cutouts arise from the brake equipment inside the bed. This means that a passage can be pre-provided through which heat can be dissipated. In this case, it is all the more effective for the heat to be dissipated that the notch is located on the largest possible radius. This is because the centrifugal force increases proportionally to the square of the distance from the center of the wheel disc, so if you reduce the outer area of the notch by 10%, which itself seems small,
If you can move the value outward, this will reduce to 10%.
This means an improvement of as much as 20%.

Light metal wheel rims, especially two-part light metal wheel rims, are however generally valued not only for their technical properties.

Rather, their aesthetic qualities are a major factor in their high evaluation. The more aesthetically pleasing the wheel rim is, the better it will sell. For a shape designer, the space in which he can create is limited to the radially innermost region. This is because this area is the only area visible from outside the wheel disc. For this reason as well, it is desirable to move the visible range of the wheel disc as far outward as possible, as the shape designer has more space for his creation.

In addition, when damage occurs to light metal wheel rims, this is usually caused by scratches in the bed, which is expensive to manufacture; damage occurs, for example, by hitting a curb.

It is this bed that has to be replaced for whatever reason: the bed has a lower mass, is smaller and the simpler its shape, the cheaper it is. This is because large, complex shapes are more expensive to forge than simple, small ones.

Finally, when the wall thickness is fixed, the stiffness of the bed increases as the distance from the outermost area to the innermost area on the radius of the bed becomes shorter. Beds that are extremely meandering or extremely long are not only disadvantageous in this sense.

The object of the invention is to provide a design that allows an optimal structure while taking into account the above boundary conditions. The objective must also take into account the differences in material requirements between the bed and the rim/wheel disc, which often or almost always use different alloys.

The tire can be mounted conventionally and should not require special considerations in this case, the design must make it possible to install one valve, and finally, of course later The condition of maintaining airtightness between the inner space and the outside world of the tire must be met.

[Means for Solving the Problems] In order to achieve the above object, the light metal wheel rim according to the present invention has the following features: (a) the wheel disc and the rim ring are integrated at least at their transition in the area around the screw; and in that position form a primarily radially outwardly directed horn, which horn has a radial end face and receives the shank of the screw (bl horn head).
Hornsl reaches approximately the height of the radial inner region of the gauge circle, (cl screws are on a radius slightly smaller than the radius at which the inner outer surface of the second roundness of the bed is located, (dl of the flange) The location radius approximately matches the inner part of the screw head.

It is characterized by

The present invention is also characterized in that, in the above main invention, the bed is 6 cm or less, preferably 5 cm or less in the radial direction. Beds are additionally 4-5 co+
It can be done.

The present invention is also characterized in that the height of the bed is 2 to 3 times the diameter of the gauge circle, more preferably 2.4±15%.

The light metal wheel rim according to the invention is also characterized in that said bed is constituted only by the outer rim horn, the seat for the gauge circle transitioning therefrom, and the flange transitioning therefrom.

The head of the horn has a gentle top.
ppel (and it is also desirable to leave a gap between the radial end face of the horn and the bent part facing the top of the bed. Furthermore, the above gentle top should be closer to the seat relative to the gauge circle. It also forms a safety reinforcement by ensuring that the safety level reaches a high level.

A blind hole opening toward the end face is provided in the horn, and a screw pusher can be press-fitted into the blind hole.

[Function] The light metal wheel rim of the main invention has a horn formed at the transition part where the wheel disc and the rim ring are integrated, which has a radial end face facing outward in the radial direction and pressing the flange against the bed. The visible part of the wheel disc can occupy a very large area. This means that the screw that forces the bed onto the horn is on a radius slightly smaller than the radius at which the inner outer surface of the second roundness of the bed is located, and that the inner radius of the flange of the bed is approximately on the inner part of the screw head. This can be achieved more effectively by matching. Also according to a feature of the main invention, no special considerations are required for conventional mounting of the tire.

Furthermore, by setting the bed height to 2 to 3 times the gauge circle diameter, the allowable value can be limited.

The bed is made more compact by consisting only of the outer rim horn, the seat for the gauge circle, and the flange.

The smooth head of the horn prevents damage to the tire material, possibly in the case of assembly where hoses are used or when emergency driving properties are important.

If the gap exists, for example, when the characteristics during emergency running are important, it is possible to secure a position where the lip-like body protruding in a wedge shape on the end side of the reinforcing portion of the tire can be gripped.

The gentle top can be used in a variety of ways by being formed as a safety reinforcement.

By press-fitting the screw bushing into the blind hole provided in the horn, the airtightness of the screw area is completely ensured.

[Example] The present invention will be described below based on illustrated embodiments.

The light metal wheel rim 11 has a geometric central axis 12. The light metal wheel rim 11 has a generally radially extending wheel disc 13. A first gauge circle 18 having a gauge center 19, which has a rim ring 14, an inner rim horn 16, and an outer rim horn 17, is circumscribed by a first roundness 21, and this roundness 21 is similar to the rim ring 14 of FIG. The transition from the right side portion to the rim horn 16 is shown.

The second gauge circle 22 with the gauge points 23 is at a -like distance from the geometric center axis 12 . The outer dimension 24 from gauge circle 18 to gauge circle 22 is in roy inches or 1
It is 65.1 mm. A roundness 26 corresponds to the gauge circle 22. The inner dimensions of the light metal rim 11 are as follows:
1 corresponds to the diameter contour of the largest braking device that must fit it.0 Contour 28 corresponds to the smaller diameter braking device.0 Dimensional details are given in inches or millimeters above. These things that can be known from the numerical values are because Figure 1 is drawn using a reduced scale.

The wheel disc 13 includes a hub area 29, and this is depicted without a cover cap. This is also followed by a spoke portion 31 as shown in FIG. 4, and which has a cutout portion 32 therein.

At the transition from the wheel disc 13, which is bent towards the right in FIG. 1, to the rim ring 14, which is inclined towards the left in FIG.
rn) 33 are provided. This horn 33 diverges from the upper side of the rim ring 14 with a quadrant 34 of relatively large radius. Below that is an even larger radius of 36
With this, the lower side of the rim ring 14 is the wheel disc 13.
move to the inner world. Where the spoke ends of the outer surface do not extend into the area of the horn 33, the outer wall 37 of the cutout portion 32 diverges from the radius 36 with a sharp angle. The radius 36 has a sufficient distance from the radius of the inner contour 27.

The horn 33 forms not only a radial extension of the rim ring 14 but also the wheel disc 13. The quadrant 34 is followed by a linear ventral surface 38 extending to the upper left, and this surface is followed by a gentle apex 39. The top part 41 is several mm higher than the 6.00 point of the gauge circle 22.
It is only higher (further outward). The horn 33 has on its outer side a precisely radial, flattened, truncated end surface 42, which at the base 43 of the horn 33 has a shoulder 44 coaxial with the geometric central axis 12. to move to. The end face 4 depending on the position and number of fixing screws 46.
A blind hole 47 is provided in the inner part of 2 slightly above the shoulder 44, and this hole does not intersect with either the quadrant 34 or the ventral surface 38.

An F-7111 threaded bushing 48 is fitted in the blind hole 47 in the axial direction, and this is connected to the end face 42.
They have an outer diameter of 11 mm.

As shown with reference numerals in FIG. 2, a narrow seal ring groove 49 is located further outward from the blind hole 47 in the radial direction.
is milled into the end face 42 and into which an integral sealing ring 51 is fitted.

The outer rim horn 17 and roundness 26 are part of the bed 52. This ped 52 is made of aluminum alloy,
However, during the manufacturing process, the strength is further increased, for example by rolling. The bed 52 has a radially running flange 53
, whose inner diameter 54 is at a small or zero distance from the shoulder 44 so that radial force transmission is possible in this case. The flat radial inner surface 56 of the flange 53 is pressed against the end surface 42 of the top 39 by the screw 46 . For the shank of the screw 46, the flange 53 has a through hole 57, which is significantly larger than the diameter of the shank, so that the screw 46 is not subjected to bending forces, but only tensile forces, on the inner side. 56 also pressurizes the seal ring 51 in the seal ring groove 49. The outer surface 58 of the flange 53 transitions substantially smoothly into the outer surface 59 of the wheel disc 13. Outer surface 5
8 rests the collar of the locking screw 46, in which case the innermost part 61 of the collar 62 lies only very slightly above the shoulder 44 or inner radius 54, in the embodiment the shoulder 44 is geometric central axis 12 166
It is located at a distance of mar, and is therefore located extremely close to the outside when compared to the total radius of 200 mm. This has been made possible by extending the normal outer edge of the wheel disc 13, using bones 33, inwardly and outwardly from where the interior of the tire will later reside.

The top of the top (der Kuppe) 39 (des h
With the position 41, the outward deviation is either gauge circle 22 or gauge circle 18.
This ends as long as the position of has to be taken into account.

As shown in FIG. 2, the flange 53 further extends outwardly with a bend 63 bent approximately 90 degrees below the top 39, so that between the bend 63 and the outer region of the top 39 there is a A gap 64 is created.

Next to the bent portion 39 is a short substantially coaxial piece 66, whose partially coaxial surface abuts the gauge circle 22 with its 6°00 o'clock area. Roundness 26 is another approximately 9 in this case
A 0° bend is formed.

and is followed by a short, radial piece 67.
7 then transitions into or forms an outer rim horn 17 with a similar radius of bending again having an angle of approximately 90°. The bed 52 has a radial height of only 42 mm.
mtn, which is extremely small considering the dimensions of the wheel.

A safety reinforcement 68 is present on the upper side of the rim ring 14 at a position slightly distanced from the left side of the gauge circle 18. Similarly, the top 41 also forms a safety reinforcement.

According to FIG. 2, the fitting hole 69 passing through the flange 53 and the horn 33 is drawn to face diagonally inward and upward at an acute angle.
A reasonable solution for the mounting of the valve can be seen depicted by the dashed line according to 778.

The solution according to the invention is therefore also suitable for use with valves and does not require structural changes.

FIG. 3 shows the inside of the tire carcass 71, its base 7.
2 has a cord 73 embedded around its periphery, the base 72 transitions into a tip 74 and this ends in a point. Naturally, the tip 74 fits into the gap 64, so that the tire remains stable even during abnormal running.

[Effects of the Invention] According to claim 1, since the visible area of the wheel disc can be enlarged, the notch for discharging the heat generated in the brake device can be provided at a position away from the center. This has the effect of efficient release. Also, by increasing the visible area of the wheel disc, the area for shape design can be made thicker, making it possible to create a variety of designs. Furthermore, by making the bed smaller, this bed, which is easily damaged and often needs to be replaced, can be made cheaper.Furthermore, because the distance from the outermost part to the innermost part on the radius of the bed has become smaller, , the rigidity of this bed also increases.

According to claim 2, it is possible to increase the area of the wheel disc considerably and, if necessary, to move the ventilation cutout further outwards. This is further optimized by the features of claims 3 and 4.

In particular, the values according to claim 4 allow a completely different type of wheel design.

The features of claims 5 and 6 serve to likewise limit the range from permissible values to optimum values.

According to the feature of claim 7, the bed is short, inexpensive, has high bending rigidity, and can be easily manufactured.

According to the features of claim 8, it does not matter whether the wheel disc is produced together with the rim ring by casting, forging or other methods (it can be designed in such a way that the production of the transition part is simplified. The tire material is not damaged during assembly or during emergency running, which is extremely desirable from a safety standpoint.

According to claim 9, performance during emergency driving can be further improved.

According to the features of claim IO, the top part is characterized by its versatile use; and according to the features of claim 11, there is no problem with the tightness of the area of the screw.

[Brief explanation of the drawing]

FIG. 1 shows, on a scale, a section through a partial region of a wheel rim with a gauge circle shown in phantom. Fig. 2 is an enlarged view of the main parts shown on a 2:1 scale with respect to Fig. 1, and shows that the present invention makes it possible to easily install a valve. Fig. 3 shows a tire. FIG. 7 is a partial cross-sectional view showing a state in which the lip of the reinforcing portion is recessed into the gap. FIG. 4 is a partial front view of the light metal wheel rim of FIG. 1. 13...Wheel disc 14...Rim ring 16...-Inner rim horn 17...Outer rim horn 21...First roundness 26...Roundness (second roundness) 33...Horn 4I ... Top part 42 ... End surface 46 ... Screw (fixed screw) 52 ... Bed 53 ... Flange 57 ... Through hole FIG, 1

Claims (11)

[Claims] (1) A wheel with one wheel disc, one rim ring, one inner rim horn, one outer rim horn, and one inner rim reinforcement according to the first gauge circle. a roundness, a second roundness corresponding to a second gauge circle of one outer rim reinforcement, and an outer coupling-like bed surrounding the second roundness, and the bed is substantially forming not only the extension of the rim ring but also the extension of the wheel disc, and having one deep annular radial flange made by a molding method, and this flange having a number of through holes, and A screw is passed through this hole, and the screw presses the flange against the radially outer annular end face of the wheel disc, and (a) the wheel disc and the rim ring are at least close to each other in the area around the screw. (b) a head of the horn integrated at the transition and forming a primarily radially outwardly directed horn at that location, the horn having a radial end face and receiving the shank of the screw; reaches approximately the height of the radial inner region of the gauge circle; (c) the screw is on a radius slightly smaller than the radius at which the inner outer surface of the second roundness of the bed is located; (d) the flange A light metal wheel rim constructed of at least two parts for a tubeless tire, characterized in that the position side radius approximately matches the inner part of the screw head. (2) A light metal wheel rim according to claim 1, characterized in that the bed is 6 cm or less measured in the radial direction. (3) The light metal wheel rim according to claim 1, wherein the bed is 5 cm or less. (4) Light metal wheel rim according to claim 3, characterized in that the bed has a height of 4 to 5 cm. (5) A light metal wheel rim according to claim 1, characterized in that the bed has a height of 2 to 3 times the gauge circle diameter. (6) The light metal wheel rim according to claim 5, wherein the bed has a height of 2.4±15% times the gauge circle diameter. 7. Light metal wheel rim according to claim 1, characterized in that the bed consists of an outer rim horn, a seat for the gauge circle transitioning therefrom and a flange transitioning therefrom. (8) The light metal wheel rim according to claim 1, wherein the head of the horn has a gentle top. 9. Light metal wheel rim according to claim 1, characterized in that a gap exists between the radial end face of the horn and the bend towards the top of the bed. (10) The gentle top forms an internal safety reinforcement;
9. Light metal wheel rim according to claim 8, characterized in that it therefore reaches a higher level than the seat relative to the gauge circle. (11) The light metal wheel rim according to claim 1, wherein a blind hole is provided in the horn, and the blind hole opens toward the end face, and a screw bush is press-fitted into the blind hole. .