JPS63159101A - Pneumatic wheel with fixed bead section seat - 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 Field of the Invention The present invention relates to a wheel consisting of a one-piece rim with a deep recess and a pneumatic tire whose bead is supported radially outwardly on the rim. In this case, a fastening element is attached in the region of the flange of the rim recess, which fastening element relates to the wheel, which secures the wheel radially inwardly against axial slippage of the bead during driving without air pressure.

(Prior art) Such a fixing element is disclosed in West German patent specification 2758342.
listed in the number. The idea is that the fixing element assumes its locking position only by centrifugal force, whereas in the rest state it can be easily unlocked. However, with smooth tires, they tend to run rather slowly, and the ongoing corrosion and friction of the mechanism operated by centrifugal force can cause failures.

Moreover, locks that cause deflection and shear during their function are relatively difficult to implement. A non-elastic material will obviously increase and the end position of the lock will change due to the wear that occurs over time, resulting in an imbalance.

OBJECTS OF THE INVENTION The object of the invention is to hold the fastening element lightly and to prevent imbalances. Moreover, the fixing element does not interfere with the assembly of the tire on the rim.

SUMMARY OF THE INVENTION It is an object of the present invention that the fastening element is a thin, elastic tongue, the tongue forming a flat angle with respect to the axis of rotation in the radial outward direction. The solution is that the rim can be pressed radially inward to the rim without plastic deformation.

(Effect of the invention) When both bead portions of a tire that is raised flat and made of steel plates move from a deep recess to the seat surface, the rim wall radially moves inward due to the action of force in the axial direction of the bead portion. It is sufficiently flexible that it can be bent elastically until it hits.

The resulting additional load on the bead wire, which tends to widen the bead wire, is prevented even in unpressurized driving in an axially inward direction, so that the bead wire does not slip out of the base, rather than if a hump large enough to be overcome is overcome. It's also small. When both tire beads reach their bearing surfaces on the rim, they release the inwardly elastically bent tongues again, so that the tongues are raised automatically. .

The gist of the present invention is to employ a tongue-like part that is flexible and elastic and flattened in the assembly direction as a fixing element, and the tongue-like part has a snap mechanism between the tire and the rim, and the snap mechanism is forced to After the assembly is completed, the bead part is moved in the axial direction and is raised up. The proposed tongue has negligible mass and does not change its condition during the life of the tire. The tongue does not cause wheel imbalance. For an especially simple tire assembly, the tongue is brought into a deep recess in which both bead parts are mounted via the rim horn with a known rocking movement from this side and are ready to snap. The delay in snap readiness on the axial plane, in which the tongue is bent onto the axial plane for the first time after, is such that the tongue has a shape in which it abuts the rim during fixation to the rim, and is flush with both. This is achieved by bending the dowel firmly plastically only after it has been transferred onto the deep recess. Of course, the tongues on both sides are only possible after both beads have been transferred onto the deep recess. The tongue must therefore be made of a plastically deformable material, so that, as already mentioned, the tongue can generally be bent strongly during assembly of the wheel. Steel plates and aluminum plates are particularly suitable, but also thermoplastic synthetic resins having a modulus of elasticity similar to rubber. Another possibility is for the tongue to rest narrowly against the rim in an at least elastically prestressed manner by means of a clamp or the like and to reduce its length until both bead parts rest on a deep recess. By pushing in or pulling out the clamp, the tongues are subsequently disengaged and then snapped ready. Plastic deformability of the tongue is not required for this deformation.

In order to prevent tilting pressure during the transmission of forces from the axial inner surface of the bead to the tongue, the ends of the tongue are advantageously inclined upwards and rounded.

When forced into a snapping movement, the tongue fits into a plane similar to a defined circular segment in its cross section. Advantageously, the pneumatic tire has a corresponding recess on the axially inner surface of its bead, so that a gap-free condition is achieved between the tongue and the inner surface of the tire. The final position of the tongue is determined by the protrusion defining the recess of the tire.

Various methods are possible for fixing the tongue to the rim. The lowest possible mass is obtained if the tongue is welded directly to the rim recess, for example by spot welding. However, the tongue can also be fixed indirectly by fixing a ring supporting the tongue in the rim recess. The radial and thrust forces are frictionally constraining, transporting such a ring in a shape-constraining manner onto the rim and only shadowing it to a small extent by circumferential car brakes and accelerations. This ring is rationally constructed in such a way that the ring is one-piece, thin-walled and U-shaped in cross section and has an axially extending collar on both its axial edges, from which elastic tongues rise. The tongue is characterized in that it is integrally connected to a fixing ring in its bead.

Advantageously, the ring is formed from a bent and finally long profile strip with joint points. The elongated section does not have to be made up of many parts, since the elongated section has a low overall stiffness and can easily overcome the limb horn by elastic twisting. The joint where the rim horn is joined to the ring must significantly resist circumferential forces constrained by centrifugal forces. They can be joined by adhesive or form-locking, even by fly snap connections. Advantageously, the bonding point is not perpendicular, but rather at an acute angle to the circumferential direction. Then, a bonding surface of sufficient size and stress can be obtained without each composition having to overcome some imbalance. On the other hand, form-constraining bonds have the advantage that they can be specially melted when required.

This facilitates the recommended replacement of the retaining ring.

The fastening ring with an integral tongue can be produced particularly cost-effectively if the wall thickness is uniform. The tongue is thereby sufficiently elastic against the radial snap action according to the invention, so that
The wall thickness must be small, while the tongue does not need to avoid thrust in order to be able to hold the tire safely on the rim. The axial rigidity of the base of the tongue which is necessary for this purpose is achieved in that the collar is supported positively on the rim.

In rims with humps, the embodiment of the springs according to the invention which is advantageous for this purpose is achieved in that the collar of the fixing ring grips each hump firmly and in a form-locking manner behind its axially outer flange. . On the rim of the hump, which makes tire assembly particularly easy, a corresponding effect is that the rim is equipped with a groove on the axially inner edge of the bead seating surface, which is open to the rim recess, and on the bead seating surface. This is achieved in that the collar of the locking ring engages in a form-locking manner at each bend.

This is achieved by locking the

(Example) The wheel shown in FIG. 1 consists of a pneumatic tire 2 and a rim 1,
The rim 1 is then either directly provided with a fastening tongue 4, as shown on the left, or accommodates a fastening ring supporting the tongue in its bottom bed, as shown on the right. The rim 1 is integral and corresponds to the finished rims currently produced in conventional mass production up to the tongue or fixing ring. The rim has a deep recess 1.1 which extends over the tire bead 2.2 over the rim horn 1.2.
1 is easy to assemble. For accommodating the bead 2.1, the rim 1 has a bead seat 1.3, and the rim is delimited axially inwardly by a hump 1.4 in each case. The entire structural space between the rim horn 1.2 is the rim bottom 1.2.
It is represented as 5.

In the embodiment shown in the left half of the drawing, the welding point is located on the axially inner side of the flange 1.7 of the deep recessed bed 1.1 of the rim. In the embodiment shown in the right half, a thin-walled fastening ring 3 is supported in a deep recess 1.1 of the rim in an axially immovable manner, the ring having one collar 3 on each of its axial edges. It has ゜1. The collar 3.1 tightly surrounds the hump 1.4 and thereby prevents the tongue root 3.21 from moving axially inwardly when the tire 2 is subjected to an axial force. End of tongue 3.2 4.
2.3.22 is easily bent upwards and all edges are rounded in order to prevent large pressure points at the point of force introduction and oblique loads on the tongues and beads, in particular so that the inner surface of the tire protected from cutting damage by the shaped part 3.2.

With the invention all conventional tires can be fixed on the rim in such a way that the tire cannot fly off the rim even in unpressurized driving conditions, a favorable driving behavior which is important in an emergency situation is the tire bead area. This is achieved by the special shape of the inner surface of 2.1. Outline is tongue 4.2.3.22
corresponds to a circular sector-like motion trajectory. Bead part 2.1
thereby has an axially inner circular sector-shaped recess 2.2, which is bounded upwardly by a thick wall 2.3 and a tongue 4.3.2. is fixed in the final position by snapping.

FIG. 1a shows another locking part of the fastening collar 3.1 as a unit. The bead seat surface 1.3 defines a rim groove 1.6 axially inwardly. Color 3 of fixing ring 3
．． 1 are not raised high as tongues and are inclined downwards, and these inclined parts 3.5 form the rim grooves 1.1.
6 and forms a rigid shape restraint that is safe against thrust.

FIG. 2 shows a perspective view of the contour strip 3.3. By taking advantage of its deflection and torsional flexibility to form a thin-walled configuration, the contoured elongate is incorporated into the rim and joined there to form an endless ring.

In this embodiment, bonding using an adhesive is considered. The joining point 3.4, on the other hand, is oriented at an acute angle to the circumferential direction, so that the joining point 3.4 reaches a large area which is wetted by the adhesive. The oblique position provides that the adhesive layer is unstressed and has no normal pressure where good strength is achieved.

A tongue 3.2 rising from the left side 3.11 of both collars 3.1 is held at a lower point by a clamp 3.12. This facilitates tire assembly from the left. As shown at the top left, after the withdrawal of the clamp 3.12 or its displacement, the tongue 3.2 is again in a high position and is thereby ready to snap. The ring has ten tongues 3.2 on each side, which allow the ring to receive an evenly distributed thrust. The large structure of the ring 3 distorts the middle part of the U-shape, whose shape corresponds to the shape of the rim previously provided on the deep recess.

In the center, the ring has at least one hole 3.7 for the passage of the air valve, and in order to save weight a plurality of holes are provided in the middle region.

Shown as six successive steps up to f. A fixing tongue is already installed in the rim, the fixing tongue being either fixed directly in the rim recess or raised from the ring.

Figure 3a shows the tire and rim before assembly. The arrow means that the tire should be assembled from right to left, starting at the left bead. In this case, ease of assembly is achieved. For ease of assembly, the tongue is not located as high on the surface on which the tire is assembled as shown here by the tongue on the right. In FIG. 3b, the left tire bead reaches the rim recess. The arrow means that the right tire bead is brought into the rim recess in a similar manner. Figure 3c shows that the left tire bead has reached the rim recess. This can be done by plastic deformation or, for example, by the locking and unlatching of some locking element which presses the tongue down elastically, as shown in FIG. The method of raising the tongue by engaging and disengaging the locking part is particularly advantageous if the tongue belongs to a fixing ring made of synthetic resin that cannot be plastically deformed.

In Figure 3d the tongues are snappable on both sides.

The door part must then be brought axially outwards in the direction of its rim seat. For this purpose, air is introduced into the tire chamber as shown by the arrow.

Figure 3e shows the tire bead part half way up.

The bead portion is not widened radially outwardly due to the tensile stiffness of the wire. Instead, the bead portion elastically bends the plate, which is raised flat with respect to the axial direction, inward by the force in the axial direction. Sliding means may be provided on the tongue axially inwardly to reduce friction.

The arrow indicates that the tire should be further inflated to move the bead further. FIG. 3f shows that the bead reaches its final position on the seat and releases the locking tongue at that moment.

The tongue is automatically raised high, thereby completing the assembly of the wheel.

Irrespective of the variants of the respective embodiments, the gist of the invention is that the finished wheel is elastically deformed in such a way that the energy required for operation is supplied and released by the bead movement into the inner chamber which is not accessible to the finished wheel. This is achieved by accumulating pressure at

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a wheel according to the invention, showing on the left the tongue fixed directly to the rim and on the right the fixing ring supporting the tongue; FIG. 1a; FIG. 1 shows six cross-sections of the assembly sequence starting from the rim with a ring collar part and a pneumatic tire in the rim as a unit until the wheel is finished; FIG. Reference numbers in the figure 1...Rim 1.1...Bottom bed 1.7...Frank 2...Pneumatic tire 2.1...Bulge 3.2...Fixing element 4...Fixing Element 5... Rotation axis α... Angle 1.5... Rim bed

Claims (10)

[Claims] (1) An integral rim (1) with a deep recess (1.1) and a bead (2.1) extending radially outward from the rim (1).
A wheel consisting of a pneumatic tire (2) supported on top, with fastening elements (4, 3.2) mounted in the region of the flange (1.7) of the rim recess (1.1). ,
In wheels, the fixing element (4, 3.2) is a thin, elastic tongue-shaped fixing element that fixes radially inwardly against axial slippage of the bead during pneumatic driving. (4, 3.2), and the tongue extends radially outwardly at a flat angle (5) with respect to the axis of rotation (5).
α) and is characterized in that it can be pressed radially inward to the rim (1) without plastic deformation. (2) The wheel according to claim 1, wherein the tongue (4, 3.2) is made of a steel plate. (3) The pneumatic tire (2) has a circular sector-shaped recess (2.2) on the axial inner surface of its bead (2.1);
A wheel according to claim 1. (4) In addition to the rim (1) and the pneumatic tire (2), a fixing ring (3) is arranged tightly in the rim deep recess (1.1).
), the fixing ring (3) is integral, thin-walled and U-shaped in cross section and has axially directed collars (3.1) on both its axial edges; An elastic tongue (3.2) is raised from the tongue (3.2).
．． Wheel according to claim 1, characterized in that 2) is integrally connected at its root (3.21) with a fastening ring (3). (5) The fastening ring (3) is formed solely from a bent final elongated profile strip (3.3) with joint points (3.4). Wheel. (6) At least one tongue (3.2) of both ring collars (3.1) is arranged in the clamp (6) in the arranged position.
5. The wheel according to claim 4, wherein the wheel is locked by an elastic return spring after locking and disengagement. (7) Its rim (1) has one hump (1.3) for each inner axial limit of the bead seat (1.3).
4), with the collar (3.1) of the locking ring (3) tightly gripping each hump and directed axially inwardly behind the axially outward flank of each hump by means of a shape-restricting pawl. Wheel according to claim 4, which prevents local movements of the collar (3.1). (8) the rim (1) has one groove (1.6) on each axially inner edge of the bead seating surface (1.3), which is open to the rim recess (1.5); Each groove has one bend (3.5)
The collar (3.1) of the fixing ring (3) engages in a form-restricting manner due to the axially inward movement of the collar (3.1).
1) The wheel according to claim 1, wherein each local movement of 1) is prevented. (9) an integral rim (1) with a deep recess (1.1) and a bead (2.1) extending radially outward from the rim (1);
A wheel consisting of a pneumatic tire (2) supported on the flange (1.7) of the rim recess (1.1).
A fixing element (4, 3.2) is installed in the area of the wheel, which fixes the bead inwardly against sliding in the axial direction during driving operation without air pressure. The fastening elements (4, 3.2) are thin, elastic tongues (
4, 3.2), the tongue forms a flat angle (α) radially outwards to the axis of rotation (5) and extends radially to the rim (1) without plastic deformation. In a method for manufacturing a wheel that can be pressed inward in the direction, the tongues (4, 3.2) are arranged in the axial plane from which the tire (2) is assembled and the rim Said method, characterized in that only after the transition of the two tire beads (2.1) into the recesses (1.5), the raising is carried out by plastic deflection or disengagement from the elastically prestressed state. (10) Both bead portions (2.1) of the tire (2) are formed by flattened tongues due to the action of an axial force during the transition from its seat surface (1.3) to the deep recess (1.1). shape part (4, 3.
2) is elastically bent radially inward towards the rim wall and released again after reaching the seat surface (1.3), so that the tongues (4, 3.2) are free at the end of assembly. The method according to claim 9, wherein the method is automatically launched.