DE202023002734U1 - Electric machine - Google Patents

Abstract

Electric machine (1) with a rotor (5) which can be rotated about an axis of rotation relative to a stator (4), and with a sensor cable (15) which is held in a cable holder (13) which is provided on a stator component (10), characterized in that the cable holder (13) is designed in two parts with a first holding body (11) fixed to the stator and a separate second holding body (12) which is connected to the first holding body (11) by a snap connection (16) such that the two holding bodies (11, 12) fix the sensor cable (15) stably to the stator component (10), wherein the stator component (10) is a connector ring (14) to which the first holding body (11) is fixed, wherein the second holding body (12) is supported on the connector ring (14) in a first axial direction, and wherein the second holding body (12) is supported on the first holding body (11) in a second axial direction. is supported.

Description

The invention relates to an electrical machine with a rotor which is rotatable about an axis of rotation relative to a stator, and with a sensor cable which is held in a cable holder provided on a stator component.

The German disclosure document EN 10 2018 119 831 A1 discloses an electrical machine comprising a stator with concentrated windings arranged on stator teeth, and at least one temperature sensor for detecting the temperature of at least one winding, wherein the temperature sensor is arranged on a stator component arranged adjacent to the at least one winding and is tensioned against the winding by means of a spring element provided or supported on the stator component, wherein the stator component is a plastic ring carrying one or more metal connection rings, or wherein the stator component is a connection ring, wherein one or more cable holders are formed on the plastic ring for fixing one or more lines led from the temperature sensor to an interface, or wherein one or more separate cable holders are arranged on the plastic ring or on the connection ring for fixing the one or more lines. The international disclosure WO 2020/216402 A1 discloses an electrical machine comprising a stator comprising a stator with a winding, and at least one temperature sensor arrangement comprising a temperature sensor for detecting the temperature in the region of the winding, wherein the ends of at least some of the conductors protrude beyond the winding, wherein some of these ends are connected to an interconnection ring placed axially or radially on the winding, wherein the temperature sensor arrangement is arranged on a conductor and the temperature sensor is thermally coupled to the conductor, wherein the temperature sensor arrangement has a housing in which the temperature sensor is accommodated and through which the conductor extends, wherein the housing has a carrier to which the temperature sensor is fixed, wherein a cover which can be detachably fastened to the carrier and which closes the housing, wherein the cover is fastened to the carrier via a snap-in or clamp connection.

The object of the invention is to improve the cable holder on an electrical machine according to the preamble of patent claim 1.

According to the invention, this object is achieved by an electrical machine according to claim 1. Preferred embodiments are set out in the dependent claims.

The object is achieved in an electric machine with a rotor that can be rotated about an axis of rotation relative to a stator and with a sensor cable that is held in a cable holder that is provided on a stator component in that the cable holder is designed in two parts with a first stator-fixed holding body and a separate second holding body that is connected to the first holding body by a snap connection such that the two holding bodies stably fix the sensor cable to the stator component. The electric machine is preferably used in a motor vehicle, in particular in a hybrid vehicle or in a purely electric vehicle. The claimed electric machine is used in particular in a hybrid module that is equipped with an integrated rotor position sensor. The sensor cable of the rotor position sensor can be stably positioned and fixed to the stator component for both transport and continuous operation using the claimed two-part cable holder. The first stator-fixed holding body is advantageously integrated into the stator component. In combination with the separate second holding body, this means that the installation space required for the cable holder can be kept small. The snap connection provides the advantage, among other things, that the sensor cable is held firmly to the stator component even in different operating states or when vibrations occur. This reliably prevents the sensor cable from becoming undesirably loose or damaged during transport or operation. The snap connection fixes the separate second holding body to the first stator-fixed holding body, preferably detachably, i.e. non-destructively separable. If necessary, the second holding body can be detached from the first holding body and removed, for example to replace the sensor cable or a sensor connected to it.

The stator component is a connector ring to which the first holding body is fixed. The first holding body is preferably connected in one piece to the connector ring, which is preferably made of a plastic material. The connector ring with the first holding body is advantageously designed as an injection-molded part.

The second holding body is supported on the connector ring in a first axial direction. This simplifies the manufacture of the second holding body. In addition, the assembly of the second holding body and the creation of the snap connection are made significantly easier by the support on the connector ring.

The second holding body is supported on the first holding body in a second axial direction. This makes it easy to ensures that the second holding body is defined and stably fixed to the connector ring with the first holding body when the snap connection is made.

A preferred embodiment of the electrical machine is characterized in that the second holding body has a U-shaped holding section with a base from which two legs are angled. The second holding body thus creates a simple and effective holding structure in order to stably attach the sensor cable to the stator component.

A further preferred embodiment of the electrical machine is characterized in that the U-shaped holding section delimits a holding space for the sensor cable on three sides, which is delimited on a fourth side by the connector ring. This provides the advantage that the attachment of the sensor cable to the stator component is made considerably easier. In addition, the sensor cable is clearly and reproducibly positioned on the stator component when the snap connection is made.

A further preferred embodiment of the electrical machine is characterized in that the sensor cable is clamped between the base of the U-shaped holding section and a circular-arc-like counter-holding section on the connector ring. The materials from which the holding bodies are formed, in particular the material from which the second holding body is formed, are matched to the cross-section of the sensor cable in such a way that a desired stable fixing of the sensor cable to the stator component is ensured, but without damaging the sensor cable due to the clamping.

A further preferred embodiment of the electrical machine is characterized in that snap hooks extend from the free ends of the legs of the U-shaped holding section, which hook onto the first holding body with undercut geometries in order to form the snap connection. This simplifies the manufacture of the holding bodies. In addition, the assembly of the second holding body onto the first holding body with the sensor cable is simplified.

A further preferred embodiment of the electrical machine is characterized in that two holding fingers extend from the free ends of the legs and are arranged in the axial direction between the connector ring and the first holding body. The second holding body can thus be supported in a simple manner on the first holding body in the second axial direction.

The invention further relates to a connector ring and/or a holding body for an electrical machine as described above. The parts mentioned can be sold separately.

• 1 eine elektrische Maschine in einer perspektivischen Ansicht;
• 2 eine schematische Darstellung einer zweiteiligen Kabelhalterung für ein Sensorkabel an einem Statorbauteil;
• 3 ein Ausführungsbeispiel der zweiteiligen Kabelhalterung für das Sensorkabel in einem Querschnitt durch das Sensorkabel;
• 4 die Kabelhalterung aus 3 in einer perspektivischen Ansicht ohne Sensorkabel; und
• 5 einen separaten zweiten Haltekörper der zweiteiligen Kabelhalterung aus den 3 und 4.

Further advantages, features and details of the invention emerge from the following description, in which various embodiments are described in detail with reference to the drawing. They show:

• 1 an electrical machine in a perspective view;
• 2 a schematic representation of a two-part cable holder for a sensor cable on a stator component;
• 3 an embodiment of the two-part cable holder for the sensor cable in a cross-section through the sensor cable;
• 4 the cable holder 3 in a perspective view without sensor cable; and
• 5 a separate second holding body of the two-part cable holder from the 3 and 4 .

In 1 an electric machine 1 for a drive train of a hybrid motor vehicle is shown in perspective. The electric machine 1 comprises a stator 4 in a motor housing 6. In the stator 4, a rotor 5 is rotatable about a rotor rotation axis. The stator 4 comprises at least one winding through which electric current can flow.

The electric machine 1 further comprises at least one connector ring. In addition, the electric machine 1 is equipped with a rotor position sensor. The rotor position sensor is equipped with at least one sensor cable.

In the 2 and 3 to 5 shows how a sensor cable 15 of the rotor position sensor can be securely attached to a stator component 10 using a two-part cable holder 13. The stator component 10 comprises a connector ring 14 which is integrally connected to a first holding body 11 of the two-part cable holder 13.

The connector ring 14 with the first holding body 11 is formed as an injection-molded part made of a plastic material. Since the first holding body 11 is integrally connected to the connector ring 14 of the stator component 10, the first holding body 11 is also referred to as being fixed to the stator.

The two-part cable holder 13 comprises a separate second holding body 12, which is connected to the first holding body by a snap connection 16 with the interposition of the sensor cable 15. per 11 is preferably detachably connected. The snap connection 16 is realized with the aid of two snap hooks 23, 24, which are formed on the first holding body 11. The snap hooks 23, 24 cooperate with undercut geometries 25, 26, which are formed on the second holding body 12, to form the snap connection 16.

In the 3 to 5 an embodiment of the two-part cable holder 13 is shown in different views. In 4 the calf support 13 is shown without sensor cable. In 5 the second holding body 12 is shown alone in perspective.

In 3 you can see how the sensor cable 15 is fixed to the connector ring 14 using the two-part cable holder 13. The sensor cable 15 is securely clamped between a holding section 18 and a counter-holding section 17 in a holding space 19. This ensures that the sensor cable 15 maintains its defined position on the stator component 10 both during transport and during operation.

The holding section 18 is U-shaped and is provided on the second holding body 12. The U-shaped holding section 18 comprises a base 20 from which two legs 21 and 22 are angled. The legs 21 and 22 are arranged essentially at right angles to the base 20.

The legs 21, 22 position the sensor cable 15 laterally in the holding space 19, i.e. essentially in the circumferential direction. The terms axial and in the circumferential direction refer to the axis of rotation of the rotor. Axial means in the direction of or parallel to the axis of rotation of the rotor.

The snap hooks 23 and 24 extend from the free ends of the legs 21, 22 of the U-shaped holding section 18. The shape of the snap hooks 23 and 24 at their free ends is coordinated with the respective undercut geometry 25, 26 on the first holding body 11 so that the snap connection 16 is easy to produce but very stable in operation.

In 4 one can see that the second holding body 12 in a first axial direction, which extends in 4 into the plane of the drawing, rests on the connector ring 14. In a second axial direction, which extends in 4 extends out of the plane of the drawing, the second holding body 12 of the two-part cable holder 13 is fixed by means of two holding fingers 27, 28.

In 5 one can see that the holding fingers 27, 28 extend from the free ends of the legs 21, 22 of the U-shaped holding section 18. By combining the snap hooks 23, 24 with the holding fingers 27, 28 on the second holding body 12, the stability of the snap connection 16 in interaction with the first holding body 11 is increased extremely effectively.

List of reference symbols

1

electric machine

4

stator

5

rotor

6

Engine housing

10

Stator component

11

first holding body

12

second holding body

13

Cable holder

14

Connector ring

15

Sensor cable

16

Snap connection

17

Counterholding section

18

Holding section

19

Holding space

20

Base

21

first leg

22

second leg

23

first snap hook

24

second snap hook

25

Undercut geometry

26

Undercut geometry

27

first holding finger

28

second holding finger

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was 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 accepts no liability for any errors or omissions.

Cited patent literature

• DE 102018119831 A1 [0002]
• WO 2020/216402 A1 [0002]

Claims (7)

Electric machine (1) with a rotor (5) which can be rotated about an axis of rotation relative to a stator (4), and with a sensor cable (15) which is held in a cable holder (13) which is provided on a stator component (10), characterized in that the cable holder (13) is designed in two parts with a first holding body (11) fixed to the stator and a separate second holding body (12) which is connected to the first holding body (11) by a snap connection (16) such that the two holding bodies (11, 12) fix the sensor cable (15) stably to the stator component (10), wherein the stator component (10) is a connector ring (14) to which the first holding body (11) is fixed, wherein the second holding body (12) is supported on the connector ring (14) in a first axial direction, and wherein the second holding body (12) is supported on the first holding body (11) in a second axial direction. is supported. Electrical machine according to Claim 1 , characterized in that the second holding body (12) has a U-shaped holding section (18) with a base (20) from which two legs (21,22) are angled. Electrical machine according to Claim 2 , characterized in that the U-shaped holding section (18) delimits on three sides a holding space (19) for the sensor cable (15), which is delimited on a fourth side by the connector ring (14). Electrical machine according to Claim 3 , characterized in that the sensor cable (15) is clamped between the base (20) of the U-shaped holding section (18) and a circular-arc-like counter-holding section (17) on the connector ring (14). Electrical machine according to Claim 1 , characterized in that snap hooks (23,24) extend from free ends of the legs (21,22) of the U-shaped holding section (18), which hook into undercut geometries (25,26) on the first holding body (11) to represent the snap connection (16). Electrical machine according to Claim 5 , characterized in that two holding fingers (27,28) extend from the free ends of the legs (21,22) and are arranged in the axial direction between the connector ring (14) and the first holding body (11). Connector ring (14) and/or holding body (11,12) for an electrical machine (1) according to one of the preceding claims.

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