Wheel bearing on an axle body for vehicles

The invention relates to a wheel bearing on an axle body designed as an axle tube for vehicles, in particular commercial vehicles, in which the wheel, for example, is fastened by means of wheel bolts to a wheel hub rotatably mounted on the axle stub of the axle tube and the axle stub is braced as a separate component with an end portion of the axle tube .

The end section of the axle tube is internally cylindrical and the axle stub is fitted with an externally corresponding cylindrical section into the end section and tensioned by tensioning means.

For passenger car axles, it is known to connect the axle stub as a separate component via flange connections to the remaining part of the axle body. In this way, the interface between the wheel hub and the axle body, ie the wheel bearing, is to be routed to a location between the axle stub and the axle body so that the bearing of the wheel, ie the wheel bearing, is not impaired when the brake disc is renewed It must never be removed. However, such flange connections are not suitable for absorbing the considerable forces in commercial vehicles.

Therefore, it has already been proposed to provide the separate axle stub with a conical connecting section, which is axially clamped in an inner cone of the end section, which is open towards the axle end, by means of an axial screw. However, this wheel bearing is very complex in manufacture and assembly and can also lead to an undesirable expansion of the end portion of the axle tube.

It is therefore an object of the present invention to propose a wheel bearing of the type mentioned at the outset, which is simple in its manufacture and assembly, as well as permanently in its function.

According to the invention, this object is achieved, for example, in that the end portion of the axle tube is formed cylindrically and with at least one longitudinal slot, the axle stub is fitted with an externally corresponding cylindrical connecting portion into the end portion of the axle tube, and the end portion of the axle tube is connected to the connecting portion of the axle stub by means of a connecting rod At least one clamping ring which is seated on the end portion of the axle tube and is slit through in the longitudinal direction.

The cylindrical fit is in contrast to that of conical surfaces easier to manufacture, durable in function and easy to loosen again. In particular, it does not lead to any widening of the end section of the axle tube, which is additionally prevented by the radial clamping action of the tensioning ring. In addition, much higher forces can be absorbed by this wheel bearing than by conventional flange connections.

The solution according to the invention is particularly advantageous if the brake body, which is already required on the axle body, forms the clamping ring, ie the clamping ring part or integrated component of the brake carrier. In this way, the brake carrier is given a double function.

While the previous brake carrier has to be connected all round to the axle body by two welded connections, only the attachment of the brake carrier to the axis of the axle tube in the use according to the invention is sufficient to ensure its positioning. The complex welding does not apply. The same also applies to a separate tensioning ring, which is to be secured in the correct position on the axle tube.

In the simplest case, the clamping ring can in each case have a clamping flange penetrated by a threaded bolt on either side of the annular slot, wherein the threaded bolt can cooperate either with an internal thread of the one clamping flange or with a separate nut.

Advantageously, the longitudinal slot of the end section of the axle tube and the annular slot, both of which are preferably axially parallel.

In order to fully utilize the maximum clamping force of the threaded bolt, without bending the latter by bending the clamping flanges, the clamping flanges can, for example, be connected to one another at their outer ends by means of a bridge. In this way, the tensioning path can only be achieved in the elastic region of the tensioning ring or brake lining material.

The longitudinal slot of the end portion of the axle tube can open at its inner end into a round hole, which is widened in width relative to the width of the slot, in order to securely limit the longitudinal slot in its length.

As an additional securing against axial migration of the axle stub, for example, at least one screw can be positioned radially on the axle tube by providing on the axle tube a local reinforcement with internal thread for receiving the screw in such a way that the inner screw end engages a circumferential groove of the axle stub . The local reinforcements can also in each case form the end of the longitudinal slots, it can also be fixedly connected in one piece to the axle tube. The local reinforcement can also be part of the clamping ring.

In a further embodiment of the invention, it is provided that the axle stub is flanged outwards at its outer end for the axial fixing of the wheel bearing. Since, in the wheel bearing according to the invention, the wheel bearing itself no longer needs to be removed, a secure fit in the axle stub can thus be provided to the wheel bearing.

Further objects, features, advantages and possible applications of the invention will become apparent from the following description of exemplary embodiments with reference to the description. All the described and / or pictorially illustrated features form the subject matter of the invention, either alone or in any combination, also independent of their summary in individual claims or their back-reference.

Show it:<dl id="dl0001"><dt>FIG</dt><dd>An embodiment of the wheel bearing according to the invention, partially cut and broken away,</dd><dt>FIG</dt><dd>A view of the axle tube provided according to the invention, longitudinally slotted in an end section,</dd><dt>FIG</dt><dd>In the end view, a brake carrier provided according to the invention with a continuous annular slot and which can be radially clamped on an axle tube</dd><dt>FIG</dt><dd>Various alternatives of a wheel bearing according to the invention in representations according to FIG. 1.</dd></dl>

According to FIG. 1, the wheel bearing according to the invention is provided on an axle body designed as an axle tube 1 for vehicles, in particular commercial vehicles. The wheel (not shown) is attached to a wheel hub (not shown), which is rotatably mounted on the axle stub 2 of the axle tube 1, for example by means of wheel bolts (not shown). The axle stub 2 is braced radially as a separate component with the end section 3 of the axle tube 1. For this purpose, the end portion 3 of the axle tube 1 is internally cylindrical. The end section 3 is provided with at least one axially parallel longitudinal slot 4. The axle stub 2 is fitted with an externally also cylindrical connecting section 5 into the end section 3 of the axle tube 1, the end section 3 of the axle tube 1 and the connecting section 5 of the axle stub 2 being connected by means of at least one longitudinally slit slot which is seated on the end section 3 of the axle tube 1 Tensioning ring 6 is radially braced. In this case, the tensioning ring 6 forms an integral component of the brake carrier 10 for bracing the brake carrier 10 on the end section 3 of the axle tube 1 and thus the end section 3 of the axle tube 1 on the connecting section 5 of the axle stub 2 Like clamping flanges 9, 9. Because of the clamping action of the brake carrier 10 on the axle tube 1, this does not require extensive welding of the brake carrier 10 on the axle tube 1, but merely affixing it to the positioning thereof, preferably in a region opposite the longitudinal slot 4, so as not to clamp the end portion 3 .

As can be seen from FIG. 2, the slot 4 of the width b terminates in a round hole 11 with this enlarged diameter, in order to prevent the longitudinal slot 4 from tearing out.

3, the axis-parallel longitudinal slot 4 of the end section 3 of the axle tube 1 and the likewise axially parallel annular slot 7 are brought into coincidence, so that an attachment of the brake carrier 10 to the outer circumference of the axle tube 1 does not impair the radial tensioning effect.

FIG. 3 also indicates that the clamping flanges 9 can be connected to one another at their outer ends by means of a bridge 15 for the complete utilization of the maximum clamping force of the threaded bolts 8.

FIG. 4 shows by way of example that apart from the use of a single tensioning ring 6 independent of the brake beam 10, a further tensioning ring 6 ', which is arranged on the axle tube 1 at an axial distance from the former, can be used next to the brake beam 10. According to FIG. 5, it is also possible to axially extend the single clamping ring 6 as a component of the brake carrier 10. Both measures serve to distribute the clamping force over the length of the slotted end section 3 of the axle tube 1.

6, it is illustrated that the axle stub 2 can be flanged outwards at its outer end 12 for the axial fixing of the wheel bearing 13. In the exemplary embodiment shown in FIG. Thus, a permanent securing of the wheel bearing 13 in its axial position is ensured.

An O-ring 14 can be provided as a seal against the penetration of moisture between the connecting section 5 of the axle stub 2 and the end section 3 of the axle tube 1. In addition, it is possible to provide an anti-corrosion layer in particular. All non-welded gaps can also be sealed with a permanently elastic mass after assembly.

FIG. 7 shows an exemplary embodiment of a securing device for the axle stub 2 on the end section 3 of the axle tube 1. It is formed by a screw 17 which can be screwed into a reinforcement 16 with an internal thread welded to the axle tube 1 and which, in its securing position, projects with its inner end into a circumferential groove 18 of the axle stub 2, namely in the region of the enlarged hole 11 at the end of the slot 4.

Reference list:

<dl id="dl0002" compact="compact"><dt>1</dt><dd>axle tube</dd><dt>2</dt><dd>axle stub</dd><dt>3</dt><dd>End section of the axle tube 1</dd><dt>4</dt><dd>longitudinal slot</dd><dt>5</dt><dd>connection section</dd><dt>6, 6 ', 6 "'</dt><dd>Clamping ring</dd><dt>7</dt><dd>ring slot</dd><dt>8th</dt><dd>Threaded studs</dd><dt>9, 9 '</dt><dd>clamping flange</dd><dt>10</dt><dd>Braking system</dd><dt>11</dt><dd>hole</dd><dt>12</dt><dd>Outer end of the axle stub 2</dd><dt>13</dt><dd>Wheel bearing</dd><dt>14</dt><dd>O-ring</dd><dt>15</dt><dd>bridge</dd><dt>16</dt><dd>local reinforcement</dd><dt>17</dt><dd>Locking element (screw)</dd><dt>18</dt><dd>Nut</dd></dl>