Driven element of an electric motor type drive unit and method of manufacturing the same

Abstract

The invention relates to a driven element (10) of an electrical drive unit (80), in particular in a motor vehicle, and to a method for producing such a driven element (10) and to an electrical drive unit (80) comprising the driven element (10), the driven element (10) having a driven pinion (12) made of metal, the driven pinion (12) having a toothing (30) for transmitting torque, wherein the driven pinion (12) has a flange region (32) which is at least regionally directly pressed around by a signal transmitter element (40), the signal transmitter element (40) having a magnetic material combined with a synthetic material.

Description

Technical Field

[0001] The present invention relates to a driven element, an electric motor-type drive unit including such a driven element, and a method for manufacturing such a driven element. Background Technology

[0002] An electric motor with a driven element for transmitting torque to a transmission mechanism is known from the applicant's subsequent disclosure DE 10 2019 203 482 A1. Here, the driven element comprises a toothed driven pinion made of metal, the driven pinion having a flange-shaped, radially circumferential edge surrounded by a sintered structure configured as a magnetic wheel for a sensor device. The requirement for the driven pinion to be made of metal arises from the need for robustness or wear resistance of the transmission-drive mechanism. Here, a form-locking connection is created between the driven pinion and the magnetic wheel through the specialized construction of the driven pinion, wherein the manufacture of the driven element with the magnetic wheel and driven pinion as a sintered structure is very complex and subject to large manufacturing tolerances. However, it is necessary for precise detection of rotational position that the magnetic wheel be sized very precisely relative to the corresponding sensor unit. Therefore, on the one hand, the manufacturing of such driven elements should be simplified, while on the other hand, the positioning of the magnetic wheel relative to the driven pinion should be improved. Summary of the Invention

[0003] In contrast, the present invention proposes a driven element for an electric drive unit, particularly in motor vehicles, comprising a driven pinion made of metal having teeth for transmitting torque, wherein the driven pinion has a flange area, the flange area being at least partially directly enclosed by a signal transmitter element having a magnetic material bonded to a composite material. The present invention also proposes a drive unit with the aforementioned driven element arranged on the rotor shaft of an electric motor, wherein a sensor magnet interacts with a sensor device for detecting the rotational position of the rotor, the sensor device being particularly used for electronic commutation of the stator coils of an electronically commutated motor, and a drive unit with the aforementioned driven element whose teeth mesh with a corresponding transmission mechanism element of a pump and particularly drive an eccentric pump for a hydraulic system preferably equipped with ABS (anti-lock braking system) and / or ESP (electronic stability control) functions. The present invention also proposes a method for manufacturing the aforementioned driven element, wherein a previously manufactured driven pinion with a flange region is arranged inside an injection molding die in such a manner that the flange region is axially supported within the injection molding die such that the flange region does not contact the inner wall of the injection molding die, but rather the injection molding die is radially sealed relative to the columnar region of the driven pinion. Furthermore, the present invention also proposes a method for manufacturing the aforementioned driven element, wherein the flange region of the previously manufactured driven pinion is axially clamped between the inner walls of the injection molding die, wherein the inner walls of the injection molding die axially press together an annular nose formed axially at the flange region until the injection molding die is completely sealed axially, wherein, in particular, two components of the injection molding die are axially sealed against the flange region from two sides respectively. The driven element according to the present invention, as well as the electric motor-type drive unit including such a driven element and the method for manufacturing such a driven element, has the advantage that by directly injecting a magnetic material incorporating synthetic material into the flange region of the metal driven pinion, the assembly of an additional intermediate sleeve made of brass is eliminated. Because the sensor magnetic wheel is made of a magnetic material bonded with composite materials, it has a significantly lower weight than a sintered magnetic wheel. Through injection molding of the composite material, the sensor magnetic wheel can be positioned with very precise dimensions relative to the driven pinion, enabling more reliable and accurate detection of the rotor's rotational position.

[0004] Advantageous improvements and enhancements to the aforementioned basic technical solution are achieved through measures further mentioned below. Particularly advantageous is that, compared to driven pinions manufactured by machining, sintered driven pinions made of metal can be manufactured at a significantly lower cost. Furthermore, the inexpensive and lightweight magnetic material of the sensor magnetic wheel, combined with the composite material, can be very well bonded to the sintered component of the driven pinion in an injection molding die. Here, a polymer is preferably used as the composite material, into which individual particles composed of hard ferrite are incorporated. The magnetic material can then be magnetized accordingly to construct a robust permanent magnet pole at the sensor magnetic wheel throughout its lifespan.

[0005] Therefore, even under extreme operating conditions, the sensor magnetic wheel will not detach from the driven pinion, whose flange area forms a form-locking connection with the magnetic material of the bonded composite material. Here, protrusions extend radially and / or axially from the flange area in a single piece, with the magnetic material of the bonded composite material then form-lockingly embedded between the protrusions. Thus, the sensor magnetic wheel can be form-locked to the flange area not only circumferentially but also axially without additional manufacturing costs. This ensures that the sensor magnetic wheel reliably remains positioned on the driven pinion throughout its entire lifespan and will not detach.

[0006] If the shape-locking element is constructed as a recessed pocket opening axially and / or radially, the magnetic material of the bonding composite can easily penetrate into the pocket during injection molding without interference due to capillary effects. The pocket can be constructed, for example, on the axial side of the flange region. To ensure sufficient mechanical stability, the pocket is constructed alternately axially upward and downward along the circumferential direction. Such pocket-shaped recesses can be advantageously manufactured using a sintering process with a driven pinion and are particularly mechanically more stable than radially teeth extending continuously along the axial direction. This reduces the axial structural height of the connecting flange.

[0007] As an alternative, the shape-locking element can also be alternately constructed as slots and radial teeth within a circumferential range, extending particularly over the entire axial extension of the flange area. Here, the slots, or radial teeth, can be precisely aligned along the axial direction of the driven pinion or can be constructed circumferentially inclined.

[0008] The driven pinion has a centrally located hole along the axial direction, through which the driven element can be pushed onto the shaft. Here, the hole can be configured as a continuous axial opening so that the shaft completely penetrates the driven pinion axially. A flange region is formed adjacent to the external teeth at the axial end of the driven pinion, the flange region having an outer diameter larger than the external teeth. A magnetic wheel is injected into the flange region and extends radially outward from the outer edge of the flange region. Particularly advantageously, a sleeve-shaped protrusion is constructed in the radially outer region of the magnetic wheel, extending away from the teeth of the driven pinion and protruding axially beyond the driven pinion of the metal. This sleeve-shaped protrusion is particularly suitable for radial interaction with the sensor element, thereby reducing the axial structural space above the driven element.

[0009] In a preferred embodiment of the invention, a columnar region is formed axially between the flange region and the teeth, the columnar region having an outer diameter smaller than that of the flange region. Additionally, such columnar regions can also be constructed axially on the side of the flange region opposite to the teeth. In particular, such columnar regions, having an outer diameter larger than that of the teeth, can be used to radially seal the injection molding die against the circumferential surface of the columnar region. Thus, the injection molding die does not need to be axially sealed against the axial side of the flange region. Consequently, the flange region can be arranged inside the injection molding die without contacting the inner wall of the injection molding die. This has the advantage that manufacturing tolerances when manufacturing the driven pinion as a structural component can be compensated for by the axially variable positioning of the flange region inside the injection molding die.

[0010] In this type of implementation, the magnetic material of the composite material then abuts axially against two opposing axial sides of the flange region and extends radially to the circumference of the columnar region. Thus, the flange region is completely surrounded by the material of the magnetic wheel at both axial sides, thereby creating a particularly secure connection between the magnetic wheel and the flange region, and consequently, an axial shape lock with the flange region. Consequently, the magnetic wheel gradually transitions radially inward from a disc-shaped section to a fork-shaped region, so as to completely surround the flange region of the driven pinion.

[0011] To precisely position the sensor magnetic wheel axially on the rotor shaft, it is particularly advantageous to use the axially opposite end face of the teeth of the sensor magnetic wheel as a reference surface. This reference surface is, for example, precisely positioned axially on the rotor shaft relative to a pre-defined axial stop. The axial distance between the axial end face of the teeth and the axially outer side of the sensor magnetic wheel facing the teeth can now be precisely pre-defined as a specified dimension. For this purpose, the teeth are pressed into a precisely manufactured axial recess in an injection mold, such that the inner wall of the injection mold always forms a very precisely pre-defined dimension, which shapes the axial outer surface of the sensor magnetic wheel. By making the injection mold radially sealed relative to the columnar region and axially unsealed relative to the flange region, the exact position of the flange region inside the injection mold is no longer important for the precise positioning of the sensor magnetic wheel. More precisely, the manufacturing tolerances of the driven pinion can be compensated for by changing the axial distance between the inner wall of the injection mold and the axial side of the flange region accordingly. This variable distance corresponds to the axial wall thickness of the sensor magnetic wheel in its forked region.

[0012] In the alternative design of the driven element, a deformation region is constructed along the entire circumference on the axial side of the flange region, which directly and sealingly abuts against the inner wall of the injection mold along the axial direction. To ensure that the sensor magnetic wheel is always precisely positioned axially relative to the flange region of the driven pinion in this embodiment, axial manufacturing errors in the flange region are compensated for by the axial compression of the deformation region using the injection mold. This ensures that the injection mold reliably and sealingly abuts against the two opposing axial sides of the flange region. In this embodiment, the material of the magnetic wheel essentially abuts only in the radially outer region of the flange region, and not against the two axial sides of the flange region. In this embodiment, for example, the precise axial position of the sensor magnetic wheel can also be precisely predetermined relative to the end face of the driven pinion facing away from the teeth. The deformation region is here constructed axially as an annular, surrounding protrusion, and the cross-section of the protrusion can be nose-shaped with rounded tips to achieve a good seal against the inner wall of the injection mold on the one hand, and sufficient deformation by the clamping force of the mold components on the other hand.

[0013] In order to construct a specified radial plane for the sensor wheel on an exact axial side of the flange region, it is preferred to construct an axial annular protrusion only on the axial side of the flange region opposite the axial end face of the tooth.

[0014] It is particularly advantageous to mount the driven element according to the invention into an electric motor-type drive unit, preferably having an electric motor. Here, the driven element is axially embedded at its free end into the rotor shaft of the electric motor, thereby axially arranging the sensor magnetic wheel in a precisely defined, specified position. The magnetized poles of the sensor magnet work in conjunction with the sensor device, which is a component of the electronic device unit of the electric motor. Here, the detected rotor position is preferably used for electronic commutation of the stator coils of the electric motor. Here, for example, the magnetic sensor can extend directly from a printed circuit board axially arranged above the driven element as a finger into the axial region of the sleeve-shaped protrusion of the sensor magnetic wheel. If the sensor is arranged radially opposite the sleeve-shaped protrusion, the axial structural space between the driven element and the electronic device unit can be reduced.

[0015] The teeth of the driven pinion extend axially away from the sensor magnetic wheel and preferably mesh with a corresponding transmission element of the transmission mechanism, which is preferably flanged axially to the motor housing. Here, the torque of the electric motor is transmitted via the transmission mechanism, particularly to the pump, which is a component of the hydraulic system in the motor vehicle. The driven pinion preferably drives a brake force amplifier, which in the motor vehicle may also be an ABS (Anti-lock Braking System) or ESP (Electronic Stability Program) system.

[0016] The manufacturing method of the driven element according to the present invention has the following advantages: A very precise and reproducible specified dimension can be manufactured very precisely by means of an axially variable arrangement of the flange region within the cavity of the injection molding die. This specified dimension is the distance between the axial end face of the tooth and the axial outer surface of the sensor magnetic wheel facing the tooth. Here, the axial end face of the tooth is pressed into a precisely manufactured axial recess in the injection molding die by means of an axial clamping force, so that the specified dimension is always predetermined through a precisely manufactured axial depth of the axial recess. Since the two axial sides of the flange region do not abut against the inner side of the injection molding die, magnetic material combined with the composite material can be injected separately into the axial region between the axial sides of the flange region and the opposing axial inner wall of the injection molding die. The injection molding die preferably consists of two halves separated by radially extending dividing surfaces. Here, the precisely manufactured axial recess for the tooth is formed only in one of the two parts of the injection molding die, so that the circumferential regions of the two columnar regions are not in contact with the dividing surfaces of the two die parts.

[0017] In a manufacturing method for an alternative driven element, two opposing axial sides of the flange region are pressed axially between two axial die halves. Here, the axial clamping force of the two die halves is so large that the annular axial protrusion formed on the axial sides of the flange region deforms to such an extent that the two die halves always seal against each other at their radially separating surfaces. This ensures that a very precise axial clearance within the die can be adjusted, regardless of the precise axial dimension of the flange region. Consequently, the axial position of the sensor magnet can always be adjusted very precisely relative to the axial sides of the flange region opposite the annular axial protrusion. Attached Figure Description

[0018] Other features of the invention, as described in the following embodiments of the invention, will be derived from other embodiments in the specification and the accompanying drawings. Wherein: Figure 1 A cross-section through the driven element according to the invention is shown; Figure 2 and Figure 3 It is shown as a method for following Figure 1 Two different variations of the driven pinion of the driven element insert; Figure 4 An injection molding die with an inserted driven pinion is shown; Figure 5 It shows how to use according to Figure 4 Follower components made from injection molding molds; Figure 6 Another variation for the driven pinion inserted into an injection molding die is shown; and Figure 7 A drive unit with a driven element already installed is shown. Detailed Implementation

[0019] exist Figure 1The diagram shows a driven element 10 for an electrical drive unit 80, such as a component of a brake force amplifier in a motor vehicle. The driven element 10 has a driven pinion 12, which is made of metal and preferably constructed as a sintered structure. The driven pinion 12 has a through-hole 44 along the axial direction 8, through which the driven element 10 can be connected to the rotor shaft 84 of the electrical drive unit 80. In the axially downward region, the driven pinion 12 has teeth 30, which are preferably constructed as helical teeth. In the axially upward region opposite the teeth 30, a flange region 32 is formed at the driven pinion 12, the flange region 32 having an outer diameter larger than the teeth 30. A sensor magnet 41 is arranged as a signal transmitter element 40 at the flange region 32, the sensor magnet 41 extending radially outward beyond the flange region 32. In this embodiment, the sensor magnetic wheel 41 is made of a polymer-bonded hard ferrite that can be directly injection-molded onto the flange region 32. Alternatively, other magnetic materials bonded to synthetic materials can also be considered for the sensor magnetic wheel 41. The sensor magnetic wheel 41 has a disc-shaped section 46 extending radially 7. A sleeve-shaped section 42 is formed at the radially outer edge 47 of the disc-shaped section 46, the sleeve-shaped section 42 extending axially away from the teeth 30 and coaxially with the through-hole 44. Here, in particular, the sleeve-shaped section 42 extends outwardly axially beyond the upper end 33 of the flange region 32. In the left half of the figure, the flange region 32 has a constant outer diameter 31 throughout its axial extension from the teeth 30 to the upper end 33. A variant of the flange region 30 is shown on the right, which has a reduced outer diameter 31 at its upper end 33 and / or toward the teeth 30. A shape-locking element 34 is formed in the flange region 32, and the magnetic material of the magnetic sensor wheel 41, made of composite material, is shape-locked into the shape-locking element 34. Thus, the sensor wheel 41 is reliably and torsionally fixed to the driven pinion 12. In this embodiment, the axial outer surface 50 of the sensor wheel 41 extends in the same radial plane 51 as the axial side surface 53 of the flange region 32. This type of driven element 10 is preferably manufactured such that the driven pinion 12, as an insert, abuts axially against the axial inner wall 94 of the injection molding die 90 via the axial side surface 53 of the flange region 32.

[0020] exist Figure 2 and Figure 3 The diagram illustrates two different design schemes for the driven pinion 12, such as the driven pinion 12 in... Figure 1 The sensor is compressed and encapsulated by magnetic wheel 41. Figure 2In this configuration, a shape-locking element 34 is formed at the radially outer edge 29 of the flange region 32. The shape-locking element 34 extends axially as a groove 35, which tends to extend axially 8, for example, circumferentially 9. Radial teeth 37 are formed between the grooves 35 by the shaping of the grooves 35, and these radial teeth 37, together with the grooves 35, form a shape lock about circumferentially 9. The inclination of the grooves 35 and the radial teeth 37 also creates a shape lock along the axial direction 8. In accordance with... Figure 2 In this embodiment, the groove 35 and the radial teeth 37 extend over the entire axial extension of the flange region 32. The teeth 30 are here directly axially connected to the flange region 32 and to the axial end face 53 of the flange region 32.

[0021] exist Figure 3 In this configuration, the shape-locking element 34 is constructed as an axially open recess 36 into which the material of the signal transmitter element 40 is shape-locked. For example, recesses 36 in the shape of pouches are formed on the two axial sides 53 of the flange region 32. The pouches 36 are preferably formed alternately on the upper and lower axial sides 53 of the flange region 32 along the circumferential direction 9. The axially and, in particular, radially open recesses 36 form a shape-lock with respect to the circumferential direction 9 and the axial direction 8.

[0022] Figure 4An alternative embodiment of the driven element 10 is shown, with the driven pinion 12 inserted into the injection molding die 90. Here, columnar regions 38 are constructed axially on both sides of the flange region 32, the columnar regions 38 having an outer diameter smaller than the outer diameter 31 of the flange region 32. The driven pinion 12 does not directly abut against the inner wall 94 of the injection molding die 90 using the side 53 of the flange region 32. Instead, the two opposing side 53 of the flange region 32 are axially spaced 70 relative to the inner side 94, so that the flange region 32 is effectively floated within the injection molding die 90. The injection molding die 90 has two axial components 91, 92, which are respectively radially sealed relative to the columnar regions 38. Here, the distance 52 between the axial end face 54 of the tooth 30 and the axial outer face 50 of the sensor magnetic wheel 41 at the flange region 32 is predetermined to a specified size. Here, the manufacturing tolerance of the driven pinion 12 is compensated for by the variable adjustment of the distance 70 between the inner wall 94 and the axial side surface 53 of the flange region 32. The inner wall 94 is pre-defined to provide the dimensions for the axial outer surface 50 of the sensor magnetic wheel 41, which then has a precisely defined gap 52 relative to the axial end face 54 of the tooth 30. To adjust the axial gap 52, the driven pinion 12 is pressed axially into the axial protrusion 72 of the tooth 30 by means of a clamping force 74, the axial protrusion 72 being formed outside the injection area of ​​the injection mold 90. Then, the material of the signal transmitter element 40 is injected into the injection mold 90.

[0023] exist Figure 5 The driven element 10 is shown in the figure, as described in the figure. Figure 4 The sensor magnetic wheel 41 is manufactured using a method described above. A disc-shaped section 46 of the sensor magnetic wheel 41 extends radially inward to two columnar regions 38 and seals against them. Here, the disc-shaped section 46 surrounds the flange region 32 using a fork-shaped region 43. Thus, the material of the sensor magnetic wheel 41 axially abuts against the two axial sides 53 of the flange region 32. The axial outer surface 50 of the sensor magnetic wheel 41 facing the tooth 30 has a distance 70 relative to the axial side 53 facing the tooth 30. The distance 52 between the axial end face 54 of the tooth 30 and the axial outer surface 50 of the sensor magnetic wheel 41 also corresponds to the distance 76 between the axial end face 54 of the tooth 30 and the axial lower side 77 of the sleeve-shaped region 42, which is also located in the plane 51. Thus, the axial position of the sleeve-shaped region 42 is precisely predetermined by the distance 52, which is necessary for precise interaction with the corresponding magnetic sensor 110. Figure 5The center can be additionally formed with a shape-locking element 34 at the radially outer edge 29, the shape-locking element 34 forming a shape lock in particular along the circumferential direction 9.

[0024] exist Figure 6 Another variation of the driven pinion 12 is shown, in which an annular axial protrusion 60 is constructed coaxially with the through-hole 44 on the axial side 53 above the flange region 32. The protrusion has a nose-shaped, arched tip 61 in cross-section. The flange region 32 of the driven pinion 12 is axially clamped between two components 91, 92 of the injection molding die 90, the two components 91, 92 being... Figure 6 The diagram is shown schematically only. Here, the annular protrusion 60 can be compressed along the axial direction 8 by the corresponding closing force 96 of the injection molding die 90 to such an extent that the axial manufacturing tolerance of the flange region 32 can be compensated according to the standard axial dimension 99 of the injection molding die 90. In this embodiment, the axial side 53 of the flange region 32 facing the tooth 30 is located in the same radial plane 51 as the axial outer surface 50 of the sensor magnetic wheel 41. Here, the material of the sensor magnetic wheel 41 does not abut against the axial side 53 of the flange region 32 along the axial direction, but rather against the radial outer edge 29 of the flange region 32. A shape-locking element 34 can be formed at the outer edge 29, which forms a shape lock particularly with respect to the axial direction 8 and / or the circumferential direction 9.

[0025] exist Figure 7An electrical drive unit 80 is shown, which is configured as an electric motor 81. The electric motor 81 is configured as a brushless electronically commutated electric motor 81 and has a stator 14 arranged in a motor housing 13. At the stator 14, stator coils 18 are arranged on inwardly pointing stator teeth, and the stator coils 18 interact with a rotor 22 rotatably supported about a rotation axis 20. A permanent magnet 24 is fixed at the rotor 22, wherein the rotor 22 is rotated by the sequential energization of the respective stator coils 18 of the stator 14. Here, the rotor 22 has a rotor shaft 84, for example, arranged in two axially spaced bearing assemblies 26, 28. The second bearing assembly 28 is arranged, for example, at the closed bottom surface 15 of the motor housing 13. The first bearing assembly 26 is housed in a bearing cover 27, which is arranged axially opposite to the bottom surface 15. The free end of the rotor shaft 84 penetrates the bearing cover 15 and the first bearing assembly 26 and extends into the axially open region 11 of the motor housing 13. A driven element 10 is torsionally connected to the free end of the rotor shaft 84. Thus, the driven element 10, with a driven pinion 12 and a signal transmitter element 40, is arranged above the bearing cover 27 in the axially open region 11. An electronic device unit (not shown) is inserted into the axially open region 11, the electronic device unit having… Figure 7 The magnetic sensor 110 is shown only schematically. The magnetic sensor 110 is connected, for example, directly to an electronic printed circuit board and is arranged radially relative to a sleeve-shaped section 42 of the sensor magnetic wheel 41. Here, the sleeve-shaped section 41 is magnetized such that multiple north and south poles 48 are alternately constructed in a circumferentially distributed manner. Here, the sleeve-shaped section 42 is preferably magnetized radially. The magnetic sensor 110 can then detect the rotational position of the rotor 22 to, for example, control the electronic commutation of the stator coils 18. A flange 16 is constructed in the axially open region 11, through which the electric motor 81 can be flanged to the transmission housing. Here, the teeth 30 of the driven pinion 12 mesh with a corresponding transmission element to, for example, operate the hydraulic pump of a brake force amplifier. The brake force amplifier is preferably a component of a braking system in a motor vehicle, which is used at least indirectly to generate braking force at the wheels of the vehicle.

[0026] It should be noted that various combinations of individual features of the embodiments shown in the drawings and description are possible. Therefore, the materials used for the structural components and the magnetic materials of the composite materials required for the corresponding drive unit 80 can be changed. The specific forming of the teeth 30 and the sensor magnetic wheel 41 can also be changed accordingly. The mechanical connection between the driven pinion 12 and the sensor magnetic wheel 41 is particularly suitable for drive units 80 in which the driven element and the electronic unit are arranged on the same axial side of the rotor 22, and in particular, the electronic circuit board extends transversely to the rotor shaft 84. The drive unit 80 according to the invention is particularly suitable as an embodiment of an electronically commutated motor for regulating movable components or for use as a rotary drive in motor vehicles. Here, such an electric motor 81 according to the invention can be particularly advantageously used in external areas, such as, for example, in a motor chamber, where the electric motor 81 is subjected to extreme weather conditions and vibrations.

Claims

1. A driven element (10) of an electrical drive unit (80) having a driven pinion (12) made of metal, the driven pinion (12) having teeth (30) for transmitting torque, wherein the driven pinion (12) has a flange region (32) at least partially directly enclosed by a signal transmitter element (40) having a magnetic material bonded to a composite material. in, An annular protrusion (60) is formed along the axial direction (8) at least one axial side (53) of the flange region (32). The annular protrusion (60) has a nose-shaped cross-section with a rounded tip (61). When the annular protrusion is inserted into the injection molding die (90), it can be squeezed along the axial direction (8) by the corresponding closing force (96) of the injection molding die (90) so that the axial manufacturing tolerance of the flange region (32) can be compensated according to the standard axial dimension (99) of the injection molding die (90).

2. The driven element (10) according to claim 1, characterized in that, The driven element (10) is used in the electrical drive unit (80) of the motor vehicle.

3. The driven element (10) according to claim 1 or 2, characterized in that, The driven pinion (12) with the flange region (32) is constructed as a metal sintered structure, and the signal transmitter element (40) is constructed as a sensor magnet (41) made of hard ferrite bonded to a polymer.

4. The driven element (10) according to claim 1 or 2, characterized in that, An axially open, pouch-shaped recess (36) is constructed in the flange region (32), the recess (36) being filled with a magnetic material of the composite material for constructing a shape-locking connection.

5. The driven element (10) according to claim 4, characterized in that, The recess (36) alternates circumferentially (9) on the axial side (53) above and below the flange region (32).

6. The driven element (10) according to claim 3, characterized in that, The driven pinion (12) has an axial through-hole (44) for receiving the rotor shaft (84), and the flange region (32) extends radially (7) at the axial end of the driven pinion (12), and the sensor magnet (41) extends radially (7) in a disc shape from the flange region (32).

7. The driven element (10) according to claim 6, characterized in that, A sleeve-shaped section (42) is integrally formed at the radially outer edge (47) of the sensor magnetic wheel (41), the sleeve-shaped section (42) extending axially (8) away from the tooth (30).

8. The driven element (10) according to claim 1 or 2, characterized in that, Regarding the axial direction (8), columnar regions (38) are formed on the two sides of the flange region (32), the columnar regions (38) having a smaller diameter than the outer diameter (31) of the flange region (32), and the magnetic material of the composite material abuts against the two columnar regions (38) radially.

9. The driven element (10) according to claim 3, characterized in that, The disc-shaped component (46) of the sensor magnetic wheel (41) surrounds the flange region (32) radially (7) in a forked shape, and on both sides of the flange region (32) axially, the sensor magnetic wheel (41) has an axial outer surface (50) respectively constructed at the flange region (32).

10. The driven element (10) according to claim 3, characterized in that, A predetermined specified size is given for the axial distance (52) from the axial end face (54) of the tooth (30) to the axial outer surface (50) of the sensor magnet (41) facing the tooth (30), wherein the tolerance compensation of the driven pinion (12) is compensated by means of the variable axial distance (70) between the axial outer surface (50) and the axial side surface (53) of the flange region (32).

11. The driven element (10) according to claim 1 or 2, characterized in that, A shape-locking element (34) is formed in the flange region (32), and the magnetic material of the composite material is shape-lockedly embedded in the shape-locking element (34), wherein the shape-locking element (34) extends radially (7) and / or axially (8).

12. The driven element (10) according to claim 11, characterized in that, The shape-locking element (34) forms a shape lock with respect to the circumferential direction (9) and / or the axial direction (8).

13. The driven element (10) according to claim 11, characterized in that, The annular protrusion (60) is formed only on the axial side (53) of the flange region (32) away from the tooth (30) and is constructed as a closed, surrounding ring.

14. The driven element (10) according to claim 13, characterized in that, The annular protrusion (60) has an arched tip (61).

15. A drive unit (80) having a driven element (10) according to any one of claims 1 to 14, characterized in that, The driven element (10) is arranged on the rotor shaft (84) of the electric motor (81), wherein the signal transmitter element (40) is configured as a sensor magnet (41) made of hard ferrite bonded to a polymer and the sensor magnet (41) works in conjunction with a sensor device (110) for detecting the rotational position of the rotor (22).

16. The driving unit (80) according to claim 15, characterized in that, The sensor device (110) is used for electronic commutation of the stator coil (18) of the electronically commutated motor.

17. A drive unit (80) having a driven element (10) according to any one of claims 1 to 14, characterized in that, The teeth (30) of the driven element (10) engage with the corresponding transmission mechanism element of the pump.

18. The drive unit (80) according to claim 17, characterized in that, The teeth (30) of the driven element (10) drive the eccentric pump of the hydraulic system used for braking machinery.

19. The drive unit (80) according to claim 17, characterized in that, The teeth (30) of the driven element (10) drive the eccentric pump of the hydraulic system for the braking force machine with anti-lock braking function and / or vehicle stability control function.

20. A method for manufacturing a driven element (10) according to any one of claims 1 to 14, characterized in that, The previously manufactured driven pinion (12) with a flange region (32) is arranged inside the injection molding die (90) in such a way that the flange region (32) is floatingly supported about the axial direction (8) inside the injection molding die (90) such that the flange region (32) does not contact the inner wall (94) of the injection molding die (90), but the injection molding die (90) is sealed radially relative to the columnar regions (38) formed on the two sides of the flange region (32) of the driven pinion (12).

21. The method for manufacturing a driven element (10) according to claim 20, characterized in that, The teeth (30) extend axially from the injection molding die (90) so that, before the signal transmitter element (40) is injected into the flange region (32) by means of a magnetic material bonded to the composite material, the axial distance (52) between the axial end face (54) of the teeth (30) and the axial inner wall (94) of the injection molding die (90) in the region of the flange region (32) is adjusted according to a predetermined axial distance (52).

22. A method for manufacturing a driven element (10) according to any one of claims 1 to 14, characterized in that, The flange area (32) of the previously manufactured driven pinion (12) is axially clamped between the inner walls (94) of the injection molding die (90), wherein the inner walls (94) of the injection molding die (90) axially press together the annular protrusions (60) formed axially at the flange area (32) until the injection molding die (90) is completely sealed axially.

23. The method according to claim 22, characterized in that, The two components (91, 92) of the injection molding die (90) are axially sealed against the flange area (32) from the two sides respectively.

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