DE102016204712A1 - Encoder for a wheel bearing - Google Patents

Abstract

The invention relates to an encoder (2) for a wheel bearing (1), comprising an L-shaped sheet metal ring (4) which is arranged on an outer ring (3) of the wheel bearing (1), wherein the sheet metal ring (4) with a first Section (4a) along one end face (5) of the outer ring (3) extends radially inwardly and with a second portion (4b) along a recess (6) of the outer peripheral surface of the outer ring (3) axially, wherein the sheet metal ring (4) via the is surrounded at least partially by a plastic ring (7), and wherein the plastic ring (7) has a lip (8) and a groove (9), wherein the lip (8) for axial support and the groove (9) for radial Receiving the sheet metal ring (4) are provided.

Description

The invention relates to an encoder for a wheel bearing, in particular a rolling bearing.

For example, goes from the DE 10 2012 204 039 A1 a wheel bearing with a sensor receptacle for receiving a rotational movement of a wheel sensing sensor with a rotatable inner ring to which a wheel of a motor vehicle can be fastened. The wheel bearing also has a fixed, fixed to the vehicle outer ring, and a rotatable inner ring associated encoder. The sensor receptacle is formed by a recess provided in a cover, which is arranged opposite the encoder and is closed at the side facing the encoder by a for the magnetic alternating field between the encoder and the sensor-permeable partition.

The object of the present invention is to further develop an encoder for a wheel bearing of a vehicle.

The encoder for a wheel bearing according to the invention comprises an L-shaped sheet metal ring which is arranged on an outer ring of the wheel bearing, wherein the sheet metal ring with a first portion along an end face of the outer ring radially inward and with a second portion along a recess of the outer peripheral surface of the outer ring axially extending, wherein the metal sheet ring is at least partially surrounded by a plastic ring over the entire circumference, and wherein the plastic ring has a lip and a groove, wherein the lip for axial support and the groove for radial reception of the sheet metal ring are provided. In other words, the sheet metal ring is at least partially axially positively received in the groove on the plastic ring and thus secured. The first and second sections are to be understood as meaning a first and a second leg, which together form the L-shaped metal sheet ring. The two legs are arranged to each other such that between the legs a substantially right angle is formed.

Preferably, the L-shaped sheet metal ring has at least one recess, wherein the plastic ring comes to rest in the at least one recess for preventing relative movement between the sheet metal ring and the plastic ring. Thus, the sheet metal ring and the plastic ring on the at least one recess rotatably connected to each other. Preferably, two recesses are formed on the sheet metal ring. Particularly preferred are four recesses on the sheet metal ring fancy, with other recesses are formed. By increasing the number of recesses in the sheet metal ring, the surface pressure of the respective contact point between the plastic ring and sheet metal ring decreases with a force acting on the plastic ring or on the sheet metal ring.

Preferably, the plastic ring is made of a polyamide material. Essentially, polyamide PA12 is used for the plastic ring. Furthermore, the plastic ring may also include arrojadite or SrFe. SrFe is a magnetic material and serves for the encoder according to the invention for detecting rotational movements by means of a sensor. Furthermore, other materials with similar properties can be used.

Preferably, the wheel bearing comprising the encoder has, on an end face of an outer ring, a recess formed over the entire circumference for at least partially receiving the lip. In other words, the formation of the recess in the outer ring is made such that it is formed substantially complementary to the shape of the lip of the plastic ring.

Further measures improving the invention will be described in more detail below together with the description of a preferred embodiment of the invention with reference to three figures, wherein the same or similar elements are provided with the same reference numerals. This shows

1 a schematic sectional view illustrating the construction of a wheel bearing according to the invention with an encoder,

2 a schematic detail of the inventive encoder according to 1 , and

3 a schematic side view of the encoder according to the invention 1 ,

According to 1 has an inventive wheel bearing 1 for a - not shown here - vehicle an encoder 2 on, with the encoder 2 on an outer ring 3 of the wheel bearing 1 is arranged. The outer ring 3 points to a front page 5 a circumferentially formed recess 11 for at least partial recording of the encoder 2 , in particular a plastic ring 7 of the encoder 2 on. In particular, there is the encoder 2 from the plastic ring 7 and an at least partially accommodated therein L-shaped sheet metal ring 4 ,

To 2 has the encoder according to the invention 2 the L-shaped sheet metal ring 4 on, on the outer ring 3 of angular contact ball bearing 1 is arranged. The sheet metal ring 4 extends with one first section 4a along a front side 5 of the outer ring 3 radially inward and with a second section 4b along a depression 6 the outer peripheral surface of the outer ring 3 in the axial direction. The sheet metal ring 4 is circumferentially in the axial direction partially of a plastic ring 7 surround. The plastic ring 7 has a circumferential lip 8th and a circumferential groove 9 on. The groove 9 is for radial reception of the sheet metal ring 4 provided, with the lip 8th for axially fixing the sheet metal ring 4 is provided.

According to 3 has the L-shaped sheet metal ring 4 of the encoder according to the invention four recesses 10 on. The plastic ring 7 comes in the respective recess 10 for preventing a relative movement between sheet metal ring 4 and plastic ring 7 to the plant. The recesses 10 are formed semicircular and over the inner circumference of the sheet metal ring 4 distributed at the end of the first section 4a arranged.

LIST OF REFERENCE NUMBERS

1

 Wheel bearings

2

 encoder

3

 outer ring

4

 Sheet metal ring

4a

 first section

4b

 second part

5

 front

6

 deepening

7

 Plastic ring

8th

 lip

9

 groove

10

 recess

11

 deepening

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102012204039 A1 [0002]

Claims (4)

Encoder ( 2 ) for a wheel bearing ( 1 ) comprising an L-shaped sheet metal ring ( 4 ) attached to an outer ring ( 3 ) of the wheel bearing ( 1 ) is arranged, wherein the sheet metal ring ( 4 ) with a first section ( 4a ) along an end face ( 5 ) of the outer ring ( 3 ) radially inwardly and with a second portion ( 4b ) along a depression ( 6 ) of the outer peripheral surface of the outer ring ( 3 ) extends axially, wherein the sheet metal ring ( 4 ) over the entire circumference at least partially of a plastic ring ( 7 ), and wherein the plastic ring ( 7 ) a lip ( 8th ) and a groove ( 9 ), wherein the lip ( 8th ) to the axial support and the groove ( 9 ) for radially receiving the sheet metal ring ( 4 ) are provided. Encoder ( 2 ) according to claim 1, characterized in that the L-shaped sheet metal ring ( 4 ) at least one recess ( 10 ), wherein the plastic ring ( 7 ) in the at least one recess ( 10 ) for preventing relative movement between sheet metal ring ( 4 ) and plastic ring ( 7 ) comes to the plant. Encoder ( 2 ) according to one of the preceding claims, characterized in that the plastic ring ( 7 ) is made of a polyamide material. Wheel bearing ( 1 ) comprising an encoder ( 2 ) according to one of claims 1 to 3, wherein the wheel bearing ( 1 ) an outer ring ( 3 ), which at one end face ( 5 ) a recess formed over the entire circumference ( 11 ) for at least partially receiving a lip ( 8th ) having.

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