Sensor bearing unit and associated manufacturing method

Abstract

A sensor bearing unit and a related manufacturing method. The sensor bearing unit (10) comprises a bearing (12) comprising a first ring (16) and a second ring (18), and a pulse ring (14) provided with a target holder (30), a target (32) mounted on the target holder, and a sleeve (34) fixed to the first ring (16), the target holder (30) being mounted axially between a side face (16d) of the first ring and the sleeve (34). The first ring (16) comprises an anti-rotation member (38) cooperating with a complementary anti-rotation member (36) of the target holder, such that an angular movement of the pulse ring (14) relative to the first ring (16) is prevented. The anti-rotation member (38) of the first ring is formed on or extends from a side face (16d) of the first ring. The anti-rotation member (36) of the pulse ring extends into the anti-rotation member of the first ring.

Description

TECHNICAL FIELD

[0001] The present invention relates to a sensor bearing unit comprising a bearing and an impulse ring. BACKGROUND

[0002] Nowadays, sensor bearing units are commonly used in a wide range of technical fields, for example, the automotive industry and aeronautics. These units provide high quality signals and transmission while allowing integration in simpler and more compact devices.

[0003] Such sensor bearing units generally comprise a bearing, an impulse ring and detection means facing the impulse ring. For example, the impulse ring is provided with a target holder and a magnetized target fixed to the target holder over the outer ring of the bearing.

[0004] The magnetic target comprises alternating north and south poles, the number of which depends on the bearing size, the detection accuracy and the specific application. The detection means can be fixed to the outer ring of the bearing or to a fixed casing. The magnetic target is attached to an outer tubular portion of the target holder.

[0005] In a first type of impulse ring, the target holder is also provided with an inner tubular portion fixed into an annular groove made in the bore of the inner ring, so as to prevent the rotation of the impulse ring relative to the inner ring. To this end, the target holder is crimped radially into the annular groove of the inner ring.

[0006] In a second type of impulse ring, the impulse ring is also provided with a fixing sleeve supporting the target holder and fixed to the inner ring. The sleeve comprises an annular axial portion and a radial collar extending radially outwards the axial portion, the target holder being mounted axially between the inner ring of the bearing and the radial collar of the sleeve. For more details, one can for example refer to patent US10132359.

[0007] Similarly to the first type of impulse ring, the axial portion of the sleeve is fixed into an annular groove of the inner ring, so as to prevent the rotation of the impulse ring relative to the inner ring.

[0008] It is important that the impulse ring is rotationally fixed to the bearing ring to which it is attached.

[0009] In some cases, due to high speed, thermal dilatation or high mechanical load, there is a significant risk that the angular mechanic connection between the impulse ring and the bearing ring holding the impulse ring is permanently or randomly partially or completely loosened. If such a failure occurs, the signal measured by the detection means will not correspond to the actual position or speed or acceleration of one of the two bearing rings with respect to the other. SUMMARY

[0010] It is an object of the present invention to provide a sensor bearing unit having an improved angular connection between the impulse ring and the associated ring.

[0011] The present invention relates to a sensor bearing unit comprising a bearing provided with a first ring and a second ring centered on an axis and an impulse ring having a target holder, a target mounted on the target holder and a sleeve fixed to the first ring of the bearing.

[0012] The target holder is mounted axially between a lateral face of the first ring of the bearing and the sleeve.

[0013] According to a first general feature, the first ring of the bearing comprises anti-rotation means cooperating with complementary anti-rotation means of the impulse ring such that an angular movement of the impulse ring with respect to the first ring is prevented.

[0014] According to a second general feature, the anti-rotation means of the first ring of the bearing are formed on and / or extend from a lateral face of said first ring.

[0015] According to a third general feature, the complementary anti-rotation means of the impulse ring extend into the anti-rotation means of the first ring. Alternatively, the anti-rotation means of the first ring can extend into the complementary anti-rotation means of the impulse ring.

[0016] Preferably, both the anti-rotation means of the first ring of the bearing and the complementary anti-rotation means of the impulse ring extend in a limited angular sector in the circumferential direction. In other words, the anti-rotation means of the first ring and the impulse ring are not annular. Thus, any relative rotation between the impulse ring and the first ring is prevented by abutment in the circumferential direction.

[0017] The sleeve of the pulser ring can include a mounting portion fixed to the first ring of the bearing and a collar extending radially outwardly from the mounting portion. The target holder is mounted axially between a side of the first ring of the bearing and the collar of the sleeve.

[0018] In one embodiment, the mounting portion of the sleeve extends only axially.

[0019] A radial gap can exist between the bore of the target holder of the pulser ring and the sleeve.

[0020] According to a first design, the anti-rotation feature of the first ring of the bearing comprises at least one recessed portion.

[0021] In one embodiment, the anti-rotation recess of the first ring of the bearing comprises at least one slot formed on a side of the first ring, the target holder of the pulser ring comprising at least one lug extending into the slot, the lug at least partially forming the complementary anti-rotation feature of the pulser ring. The slot and the lug can extend axially. Alternatively, the slot and the lug can extend obliquely.

[0022] In another embodiment, the anti-rotation recess of the first ring of the bearing comprises at least one axial slot extending axially from a side of the first ring along a cylindrical surface of the first ring, the sleeve comprising at least one boss extending into the axial slot and having a complementary shape, the boss at least partially forming the complementary anti-rotation feature of the pulser ring. The anti-rotation recess of the first ring can comprise a plurality of axial slots spaced apart in a circumferential direction, the sleeve comprising a plurality of bosses each extending into one of the axial slots.

[0023] Alternatively or in combination, the anti-rotation recess of the first ring of the bearing can comprise at least one radial slot formed on a side of the first ring, the target holder comprising at least one boss extending into the radial slot and having a complementary shape, the boss at least partially forming the complementary anti-rotation feature of the pulser ring. The anti-rotation recess of the first ring can comprise a plurality of radial slots spaced apart in a circumferential direction, the sleeve comprising a plurality of bosses each extending into one of the radial slots.

[0024] In another embodiment, said anti-rotation recess of the first ring of the bearing can comprise an eccentric groove formed on a lateral face of the first ring, the target holder comprising an eccentric rib extending into the eccentric groove and having a complementary shape, said eccentric rib at least partially forming a complementary anti-rotation part of the pulse ring.

[0025] According to a second design, the anti-rotation part of the pulse ring comprises at least one anti-rotation recess.

[0026] In one embodiment, said anti-rotation recess of the pulse ring comprises at least one slot formed on the target holder, the lateral face of the first ring of the bearing comprising at least one lug extending from said lateral face into said slot. Said slot and said lug can extend axially. Alternatively, said slot and said lug can extend obliquely.

[0027] In another embodiment, said anti-rotation recess of the pulse ring comprises at least one axial slot extending along a cylindrical surface of the sleeve, the first ring of the bearing comprising at least one boss extending into said axial slot and having a complementary shape, said boss extending from a lateral face of the first ring.

[0028] Alternatively or in combination, said anti-rotation recess of the pulse ring comprises at least one radial slot formed on the target holder, the lateral face of the first ring of the bearing comprising at least one boss extending into said radial slot and having a complementary shape, said boss extending from a lateral face of the first ring.

[0029] In another embodiment, said anti-rotation recess of the pulse ring can comprise an eccentric groove formed on the target holder, the lateral face of the first ring of the bearing comprising an eccentric rib extending into the eccentric groove and having a complementary shape, said eccentric rib extending from a lateral face of the first ring.

[0030] The application also relates to a sensor bearing unit comprising: a bearing provided with a first ring and a second ring centered on an axis; and a pulse ring provided with a target holder, a target mounted on the target holder, and a sleeve fixed to the first ring of the bearing.

[0031] The target holder is mounted axially between a lateral face of the first ring of the bearing and the sleeve.

[0032] According to a first general feature, the first ring of the bearing comprises an anti-rotation part cooperating with a complementary anti-rotation part of the pulse ring to prevent angular movement of the pulse ring relative to the first ring.

[0033] According to a second general feature, the anti-rotation member of the first ring and the anti-rotation member of the pulse ring extend in the circumferential direction over a limited angular sector.

[0034] According to a third general feature, the anti-rotation member of the pulse ring extends into the anti-rotation member of the first ring. Alternatively, the anti-rotation member of the first ring can extend into the anti-rotation member of the pulse ring.

[0035] The application also relates to a method for manufacturing a sensor bearing unit as described previously, wherein the sleeve is fixed to the first ring only by axial press-fitting.

[0036] In one embodiment, the anti-rotation member of the pulse ring or the anti-rotation member of the first ring can be formed during the step of axial press-fitting. BRIEF DESCRIPTION OF DRAWINGS

[0037] The application and its advantages will be better understood through a detailed description of a specific embodiment given by way of non-limiting example and illustrated by the attached drawings in which:

[0038] Figure 1 is an axial sectional view of a sensor bearing unit according to a first example of the application,

[0039] Figure 2 is a detailed view of Figure 1 ,

[0040] Figure 3 is a detailed view of Figure 1 ,

[0041] Figure 4 is a detailed view of Figure 1 ,

[0042] Figure 5 and Figure 6 is a detailed view of a sensor bearing unit according to a second example of the application,

[0043] Figures 7 to 9 is a detailed view of a sensor bearing unit according to a third example of the application,

[0044] Figures 10 to 12 is a detailed view of a sensor bearing unit according to a fourth example of the application,

[0045] Figures 13 to 15 is a detailed view of a sensor bearing unit according to a fifth example of the application, and

[0046] Figure 16 is a detailed view of a sensor bearing unit according to a sixth example of the application. DETAILED DESCRIPTION

[0047] Figure 1 The sensor bearing unit 10 illustrated is suitable for equipping devices such as motors, braking systems, suspension systems or any rotating machine, in particular for motor vehicles.

[0048] The sensor bearing unit 10 comprises a bearing 12 and an impulse ring 14 mounted on the bearing.

[0049] The bearing 12 comprises a first ring 16 and a second ring 18. In the example illustrated, the first ring 16 is an inner ring and the second ring 18 is an outer ring. The inner ring 16 and the outer ring 18 are concentric and extend axially along an axis of rotation X-X' of the bearing, which extends in the axial direction. The inner ring 16 and the outer ring 18 are made of steel.

[0050] In the example illustrated, the bearing 12 also comprises a row of rolling elements 20, here in the form of balls, interposed between a raceway (not referenced) formed on the inner ring 16 and a raceway (not referenced) formed on the outer ring 18. The rolling bearing 12 also comprises a cage 22 for maintaining a regular circumferential spacing of the rolling elements 20.

[0051] The inner ring 16 of the bearing is intended to be mounted on a shaft of a device for tracking the rotation of the shaft. The inner ring 16 is intended to rotate, while the outer ring 18 is intended to be fixed. The outer ring 18 can be mounted in a fixed support member or housing belonging to the device.

[0052] The inner ring 16 comprises a cylindrical inner face or bore 16a and a cylindrical outer face 16b diametrically opposite the bore 16a. A toroidal circular raceway for the rolling elements 20 is formed by the cylindrical outer face 16b, which points radially outwards.

[0053] The inner ring 16 also comprises two diametrically opposite radial lateral faces 16c, 16d delimiting in the axial direction the bore 16a and the outer face 16b of said ring.

[0054] The inner ring 16 also comprises a cylindrical groove 16e made in the bore 16a. The groove 16e is centred on the axis X-X'. The diameter of the bore 16a is less than the diameter of the groove 16e. The groove 16e opens on the radial lateral face 16d.

[0055] The impulse ring 14 is mounted on the inner ring 16. The impulse ring 14 comprises: an annular target holder 30; a target 32 mounted on said target holder; and a fixing sleeve 34 fixed to the inner ring 16.

[0056] The target holder 30 is axially fixed to the inner ring 16 of the bearing by means of the sleeve 34. The target holder 30 is mounted axially between the side face 16d of the inner ring of the bearing and the sleeve 34. The target holder 30 is mounted radially around the sleeve 34. The target holder 30 is axially interposed and clamped between the side face 16d of the inner ring and the sleeve 34. The target holder 30 is in axial contact against the side face 16d of the inner ring on one side and in axial contact with the sleeve 34 on the other side.

[0057] The target holder 30 comprises: an annular radial portion 30a defining a bore of the target holder; and an annular outer axial portion 30b radially surrounding the bearing 12. The outer axial portion 30b is positioned radially above the outer ring 18 of the bearing. The outer axial portion 30b extends radially beyond the large diameter edge of the radial portion 30a.

[0058] The radial portion 30a of the target holder is axially interposed and clamped between the side face 16d of the inner ring of the bearing and the sleeve 34. In the example shown, the radial portion 30a of the target holder is provided with a frustoconical portion inclined towards the opposite direction of the bearing 12 with respect to the axis X-X'. The frustoconical portion prevents any interference between the target holder 30 and the outer ring 18 of the bearing.

[0059] As will be described later, the target holder 30 also comprises a lug 36 to prevent angular movement with respect to the inner ring 16 of the bearing.

[0060] In the disclosed example, the target holder 30 is made in one piece. The target holder 30 can be made of metal or plastic, formed by stamping or by any other suitable process.

[0061] The sleeve 34 is axially fixed to the inner ring 16. The sleeve 34 is mounted into the bore 16a of the inner ring of the bearing. The sleeve 34 is fixed into the bore 16a. More precisely, the sleeve 34 is mounted and fixed into the groove 16e of the bore. For example, the sleeve 34 can be fixed into the bore 16a of the inner ring 16 by axial press-fitting.

[0062] As previously mentioned, the sleeve 34 is axially fixed to the inner race 16. The sleeve 34 can also be angularly fixed to the inner race 16 to rotationally secure the sleeve and the inner race 16. In this case, the sleeve 34 can be fixed into the bore 16a by snapping, gluing, welding, crimping or any other suitable means.

[0063] The sleeve 34 comprises an annular axial portion 34a defining a bore of the sleeve and an outer radial portion or collar 34b extending radially from the axial portion 34a. The collar 34b extends radially outwardly from the axial portion 34a. The collar 34b extends an axial end of the axial portion 34a.

[0064] The target holder 30 is mounted radially around the axial portion 34a of the sleeve. The radial portion 30a of the target holder is mounted radially around the axial portion 34a. There is an annular radial gap (not shown) between the bore of the target holder 30 and the axial portion 34a of the sleeve. The axial portion 34a of the sleeve is fixed to the inner race 16 of the bearing. The axial portion 34a is mounted and fixed into the bore 16a of the inner race of the bearing. More precisely, the axial portion 34a of the sleeve is mounted and fixed into the groove 16e of the bore.

[0065] The target holder 30 is axially interposed and clamped between the side face 16d of the inner race and the radial collar 34b of the sleeve 34. The radial collar 34b axially abuts the radial portion 30a of the target holder.

[0066] In the disclosed example, the sleeve 34 is made in one piece. The sleeve 34 can be made of metal or plastic, formed by stamping or by any other suitable process.

[0067] The target 32 is mounted on the outer axial portion 30b of the target holder. In the disclosed example, the target 32 is mounted into the bore of the outer axial portion 30b. As an alternative, the target 32 can be mounted on the outer surface of the outer axial portion 30b.

[0068] In an embodiment, the target 32 comprises alternating magnetic north poles and magnetic south poles. The target 32 is multi-polarly magnetized in the circumferential direction. The target 32 can be a plastic molded part. The target 32 can be overmolded onto the target holder 30. As an alternative, the target 32 can be formed separately and can be fixed to the target holder 30 by any suitable means, for example by bonding or by press-fitting. The target 32 can be formed of a rubber material with magnetic powder, or of a magnetic alloy, or of a plasto-ferrite, or of an elasto-ferrite.

[0069] A detection means (not shown) is associated with the target 32 for tracking the rotation of the pulsed ring 14 and of the inner ring 16 about the axis X-X'. The detection means is arranged radially facing the inner surface of the target 32. For example, the detection means can comprise a Hall effect sensor. The target 32 is a radial target. As an alternative, the target can be an axial target.

[0070] As an alternative, the target 32 and the detection means can use any other suitable technology instead of a magnetic technology. For example, an inductive technology or an optical technology can be implemented.

[0071] As previously mentioned, the target holder 30 comprises a lug 36 to form anti-rotation means. The lug 36 extends from the radial portion 30a of the target holder towards the inner ring 16 of the bearing. The lug 36 extends axially towards the inner ring 16.

[0072] As Figure 2 and Figure 3 More clearly shown, the lug 36 extends the inner edge of the radial portion 30a of the target holder. The lug 36 delimits, with the radial portion 30a, a hole of the target holder. The lug 36 is arranged around the axial portion 34a of the sleeve.

[0073] In the example shown, the target holder 30 comprises a plurality of lugs 36. The lugs 36 are identical to each other. The lugs 36 are spaced apart from each other in the circumferential direction, preferably regularly spaced apart. Here, the target holder 30 comprises three lugs 36. As an alternative, the number of lugs can be at least equal to two. In another variant, the target holder 30 can comprise only one lug 36.

[0074] Each lug 36 of the target holder extends axially into a slot 38 formed on the side face 16d of the inner race. Each slot 38 extends axially from the side face 16d into the thickness of the inner race. Each slot 38 is oriented axially toward the radial portion 30a of the target holder. In the example shown, each slot 38 opens radially to the groove 16e of the bore. Alternatively, each slot 38 can not open radially to the groove 16e. In this case, there is a radial wall between the groove 16e and each slot 38. The slots 38 are identical to each other.

[0075] Each slot 38 extends in the circumferential direction over a limited angular sector. The circumferential dimension of each slot 38 is substantially equal to the circumferential dimension of the associated lug 36. Each slot 38 is provided with two side walls 38a, 38b facing each other in the circumferential direction Figure 4 ). The side walls 38a, 38b delimit the slot in the circumferential direction.

[0076] Any relative rotation of the target holder 30 with respect to the inner race 16 is prevented by the abutment of each lug 36 with the side walls 38a, 38b of the associated slot 38.

[0077] The slots 38 of the inner race form a partial anti-rotation member which cooperates by circumferential contact with the lugs 36 of the target holder which form a partial complementary anti-rotation member.

[0078] Figure 5 and Figure 6 The second example shown in Figs. 1 1 to 14 differs from the first example in that the lugs 40 of the target holder 30 extend obliquely toward the inner race 16 of the bearing, instead of extending axially. Only the orientation of the lugs 40 is different from the first example.

[0079] Each lug 40 of the target holder extends into a slot 42 extending from the side face 16d of the inner race. Each slot 42 extends obliquely inwardly from the side face 16d. In the example shown, each slot 42 opens to the groove 16e of the bore.

[0080] Similarly to the slots of the inner race of the first example, each slot 42 extends in the circumferential direction over a limited angular sector. The circumferential dimension of each slot 42 is substantially equal to the circumferential dimension of the associated lug 40. Each slot 42 is provided with two side walls 42a, 42b facing each other in the circumferential direction. The side walls 42a, 42b delimit the slot in the circumferential direction.

[0081] The length of the lugs 40 of the target holder 30 can be designed such that their free ends protrude into the thickness of the axial portion 34a of the sleeve. This further enhances the anti-rotation between the sleeve 34 and the target holder. As an alternative, the lugs 40 of the target holder can remain spaced apart from the axial portion 34a of the sleeve. In this case, there is an annular radial gap between the target holder 30 and the axial portion 34a of the sleeve.

[0082] Figures 7 to 9 The third example, illustrated in Fig. 3, differs from the previous examples in that the partial anti-rotation member of the inner ring 16 cooperates with a partial anti-rotation member provided on the sleeve 34 of the pulse ring.

[0083] In this example, the anti-rotation member of the inner ring 16 comprises a plurality of axial slots 44 extending in the axial direction from the side face 16d of the inner ring along the cylindrical slot 16e of the bore. Each slot 44 is oriented in the radial direction towards the axial portion 34a of the sleeve. The slots 44 are spaced apart from each other in the circumferential direction, preferably regularly spaced apart.

[0084] Each slot 44 extends over a limited angular sector in the circumferential direction. Each slot 44 is provided with two side walls 44a, 44b facing each other in the circumferential direction. The side walls 44a, 44b delimit the slot in the circumferential direction.

[0085] The sleeve 34 comprises a plurality of axial bosses 46 each extending in the radial direction into one of the axial slots 44 and having a complementary shape. The bosses 46 form the anti-rotation member of the sleeve 34. The bosses 46 extend outwardly from the axial portion 34a of the sleeve. The bosses 46 extend outwardly from the outer surface of the axial portion 34a. The bosses 46 protrude outwardly in the radial direction. The bosses 46 extend in the axial direction along the axial portion 34a of the sleeve.

[0086] Any relative rotation of the sleeve 34 with respect to the inner ring 16 is prevented by the abutment of each boss 46 in the circumferential direction with the side walls 44a, 44b of the associated slot.

[0087] In the illustrated example, the inner ring 16 and the sleeve 34 comprise a plurality of axial slots 44 and bosses 46, respectively. As an alternative, the inner ring 16 and the sleeve can comprise only one slot 44 and one boss 46.

[0088] In Figures 10 to 12In a fourth example, illustrated in Fig. 4 (wherein identical parts are given identical reference numerals), the anti-rotation means of the inner ring 16 comprises a plurality of radial slots 48 formed on the side face 16d of the inner ring. Each slot 48 extends in the radial direction on the side face 16d. Each slot 48 is oriented in the axial direction towards the radial portion 30a of the target holder. The slots 48 are spaced apart from each other in the circumferential direction, preferably regularly spaced apart.

[0089] Each slot 48 extends in the circumferential direction over a limited angular sector. Each slot 48 is provided with two side walls 48a, 48b facing each other in the circumferential direction. The side walls 48a, 48b delimit the slot in the circumferential direction.

[0090] The target holder 30 comprises a plurality of radial tabs 50, each extending in the axial direction into one of the radial slots 48 and having a complementary shape. The tabs 50 form the anti-rotation means of the target holder 30. The tabs 50 extend outwardly from the radial portion 30a of the target holder. The tabs 50 protrude in the axial direction. The tabs 50 extend in the radial direction along the radial portion 30a of the target holder.

[0091] Any relative rotation of the target holder 30 with respect to the inner ring 16 is prevented by the abutment of each tab 50 in the circumferential direction with the side walls 48a, 48b of the associated slot.

[0092] In the example illustrated, the inner ring 16 and the target holder 30 comprise a plurality of radial slots 48 and tabs 50, respectively. Alternatively, the inner ring 16 and the target holder 30 can comprise only one slot 48 and one tab 50.

[0093] In the example illustrated, the inner ring 16 and the target holder 30 comprise a plurality of radial slots 48 and tabs 50, respectively. Alternatively, the inner ring 16 and the target holder 30 can comprise only one slot 48 and one tab 50. Figures 13 to 15 In a fifth example, illustrated in Fig. 5 (wherein identical parts are given identical reference numerals), the inner ring 16 of the bearing comprises axial slots 44 and radial slots 48 as disclosed in the third and fourth examples. The sleeve 34 and the target holder 30 further comprise tabs 46, 50, respectively.

[0094] Figure 16 In a sixth example, illustrated in Fig. 6 (wherein identical parts are given identical reference numerals), the inner ring 16 of the bearing comprises an annular eccentric groove 52 formed on the side face 16d of the inner ring. The center of the eccentric groove 52 is radially offset with respect to the rotation axis of the bearing. The eccentric groove 52 is oriented in the axial direction towards the radial portion 30a of the target holder.

[0095] The target holder 30 comprises an annular eccentric rib 54 extending in the axial direction into the eccentric groove 52 and having a complementary shape. The rib 54 extends outwardly from the radial portion 30a of the target holder. The rib 54 protrudes in the axial direction.

[0096] ​Any relative rotation of the target holder 30 with respect to the inner race 16 is prevented by wedging the eccentric ribs 54 into the eccentric grooves 52.

[0097] The eccentric grooves 52 of the inner race form annular anti-rotation members which cooperate by being wedged by the eccentric ribs 54 of the target holder which form annular complementary anti-rotation members.

[0098] In the shown examples, the sensor bearing unit is provided with a rolling bearing comprising a row of rolling elements. Alternatively, the rolling bearing can comprise at least two rows of rolling elements. In the shown examples, the rolling elements are balls. Alternatively, the rolling bearing can comprise other types of rolling elements, e.g. rollers. In another variant, the rolling bearing can also be provided with a plain bearing without rolling elements.

[0099] Further, as previously mentioned, in these shown examples, the first race of the rolling bearing is the inner race, while the second race is the outer race. As an alternative, an opposite configuration can be provided, with the first race forming the outer race and the second race forming the inner race. In this case, the target holder is fixed to the outer race.

Claims

1. A sensor bearing unit (10), comprising: - Bearing (12), comprising a first ring (16) and a second ring (18) centered on the axis (X-X'); as well as - A pulse ring (14) comprising a target holder (30), a target (32) mounted on the target holder, and a sleeve (34) fixed to the first ring (16) of the bearing, the target holder (30) being axially mounted between the side (16d) of the first ring of the bearing and the sleeve (34), characterized in that the first ring (16) of the bearing includes anti-rotation components (38; 42; 44; 48; 52), the anti-rotation components (38; 42; 44; 48; 52) cooperating with complementary anti-rotation components (36; 40; 46; 50; 54) of the pulse ring, thereby preventing the target from rotating. The pulse ring (14) moves angularly relative to the first ring (16), the anti-rotation component (38; 42; 44; 48; 52) of the first ring of the bearing is formed on and / or extends from the side (16d) of the first ring, the complementary anti-rotation component (36; 40; 46; 50; 54) of the pulse ring extends into the anti-rotation component (38; 42; 44; 48; 52) of the first ring, or the anti-rotation component (38; 42; 44; 48; 52) of the first ring extends into the complementary anti-rotation component (36; 40; 46; 50; 54) of the pulse ring.

2. The sensor bearing unit (10) according to claim 1, characterized in that, The anti-rotation components (38; 42; 44; 48) of the first ring of the bearing and the complementary anti-rotation components (36; 40; 46; 50; 54) of the pulse ring extend in a limited angular sector in the circumferential direction.

3. The sensor bearing unit (10) according to claim 1 or 2, characterized in that, The sleeve (34) includes a mounting portion (34a) fixed to the first ring (16) of the bearing, the mounting portion (34a) extending only in the axial direction.

4. The sensor bearing unit (10) according to claim 1 or 2, characterized in that, There is a radial gap between the hole in the target holder (30) of the pulse ring and the sleeve (34).

5. The sensor bearing unit (10) according to claim 1 or 2, characterized in that, The anti-rotation component (38; 42; 44; 48; 52) of the first ring of the bearing includes at least one anti-rotation recess.

6. The sensor bearing unit (10) according to claim 5, characterized in that, The anti-rotation recess includes at least one slot (38; 42) formed on the side (16d) of the first ring of the bearing, and the target retainer (30) of the pulse ring includes at least one lug (36; 40) extending into the slot (38; 42), the lug (36; 40) at least partially forming a complementary anti-rotation component of the pulse ring.

7. The sensor bearing unit (10) according to claim 5, characterized in that, The anti-rotation recess includes at least one axial groove (44) extending axially from the side (16d) of the first ring of the bearing along the cylindrical surface (16a) of the first ring. The sleeve (34) includes at least one boss (46) extending into the axial groove (44) and having a complementary shape. The boss (46) at least partially forms a complementary anti-rotation component of the pulse ring.

8. The sensor bearing unit (10) according to claim 5, characterized in that, The anti-rotation recess includes at least one radial groove (48) formed on the side (16d) of the first ring of the bearing, and the target retainer (30) includes at least one boss (50) extending into the radial groove (48) and having a complementary shape, the boss (50) at least partially forming a complementary anti-rotation component of the pulse ring.

9. The sensor bearing unit (10) according to claim 5, characterized in that, The anti-rotation recess includes an eccentric groove (52) formed on the side (16d) of the first ring of the bearing, and the target retainer (30) includes an eccentric rib (54) extending into the eccentric groove (52) and having a complementary shape, the eccentric rib (54) at least partially forming a complementary anti-rotation component of the pulse ring.

10. A method for manufacturing a sensor bearing unit according to any one of the preceding claims, wherein, The sleeve (34) is fixed to the first ring (16) by axial press fitting only.

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