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CN-122003804-A - Electric drive for a vehicle

CN122003804ACN 122003804 ACN122003804 ACN 122003804ACN-122003804-A

Abstract

The invention relates to an electric drive (10) for a vehicle, comprising a housing (G), an Electric Motor (EM) which is arranged in the housing (G), a sensor device (S) having a clamping device (HV), wherein the sensor device (S) can be mounted in the housing (G) using the clamping device (HV), wherein the clamping device (HV) comprises a guide region (FB) which can be positioned in a recess (A) in the housing (G) and which comprises at least one support element (SM) which is located at a predetermined region of the outer surface of the guide region (FB) and with which the guide region (FB) can be centered in the recess (A), and wherein the guide region (FB) comprises at least one pressing element (VP) at a further predetermined region of the outer surface of the guide region (FB) which can be positioned by pressing when the guide region (FB) is placed in the recess (A) using the at least one pressing element, the pressing element (VP) and the support element (SM) are located at two planes of the guide region (FB) that are different relative to each other.

Inventors

  • P. BEAGLE
  • JOERG MARKUS

Assignees

  • 罗伯特·博世有限公司

Dates

Publication Date
20260508
Application Date
20241004
Priority Date
20231013

Claims (11)

  1. 1. An electric drive device (10) for a vehicle, comprising: -a housing (G); -an Electric Motor (EM) arranged in the housing (G); -a sensor device (S) with a clamping device (HV), wherein the sensor device (S) can be fitted with the clamping device (HV) in the housing (G) and/or in the motor (EM), wherein the clamping device (HV) comprises a guide region (FB) which can be positioned in a recess (a) in the housing (G) and/or in the motor (EM), and wherein the guide region (FB) comprises at least one support element (SM) which is located at a predetermined region of the outer surface of the guide region (FB) and with which the guide region (FB) can be centered in the recess (a), and wherein the guide region (FB) furthermore comprises at least one pressing element (VP) at a further predetermined region of the outer surface of the guide region (FB), wherein the at least one pressing element can be positioned with respect to each other by means of the guide region (FB) at least one pressing element when the guide region (FB) is inserted into the recess (a), wherein the pressing elements can be positioned with respect to each other by the guide region (FB) at the same tolerance as the guide region (SM).
  2. 2. The electric drive (10) according to claim 1, wherein the guiding region (FB) has a circular cross section.
  3. 3. The electric drive (10) according to claim 1 or 2, wherein the clamping device (HV) comprises a first O-ring (O1) and a second O-ring (O2), which are arranged in two different planes at the outer surface of the guiding area (FB).
  4. 4. An electric drive (10) according to any one of claims 1 to 3, wherein the guiding region (FB) comprises two pressing elements (VP) which are arranged around an outer surface of the guiding region (FB) with respect to each other and with respect to the support element (SM) at an angular spacing of 120 °.
  5. 5. The electric drive (10) according to any one of claims 1 to 4, wherein the guide region (FB) comprises a further support element (AS) which is arranged in the plane of the pressing element (VP) and is arranged at a predetermined angle in the direction of revolution of the outer surface of the guide region (FB).
  6. 6. The electric drive (10) according to any one of claims 1 to 5, wherein the at least one pressing element (VP) is a drop-shaped elastic element, which is enclosed in the guide region (FB).
  7. 7. The electric drive (10) according to any one of claims 1 to 6, wherein the clamping device (HV) comprises a bearing flange region (AF) which extends perpendicularly to an outer surface of the guide region (FB) and with which the recess (a) can be covered at least in an edge region of the recess (a) with the clamping device (HV) being inserted.
  8. 8. The electric drive (10) according to claim 7, wherein the clamping device (HV) comprises a three-point support (DPA) by means of a sleeve (B) in a fastening recess (BA) in the support flange region (AF) and by means of two protruding regions (FP) at the side of the support flange (AF) facing the housing (G).
  9. 9. The electric drive (10) according to claim 8, wherein the sleeve (B) and the two protruding areas (FP) of the three-point bearing (DPA) are spaced apart from each other by 120 ° in the direction of revolution of the bearing flange Area (AF).
  10. 10. The electric drive (10) according to any one of claims 1 to 9, wherein the support element (SM) comprises metal.
  11. 11. The electric drive (10) according to any one of claims 1 to 10, wherein the clamping device (HV) comprises an enclosure for a cable connection and for the sensor arrangement (S).

Description

Electric drive for a vehicle Technical Field The present invention relates to an electric drive apparatus for a vehicle. Background In a typical electric drive, the sensor can be fixed in the housing of the electric drive shaft with a specific clamp. In a typical embodiment, the clamping elements can be made of plastic and are inserted into recesses provided in the housing of the electric drive shaft. In order to be able to fix and center the clamping element, which is composed of plastic, in the recess in a good manner, it is advantageous if the support element and the sealing element are located between the clamping element and the housing of the electric drive shaft. In a typical holder, the support element or centering element can be arranged in one plane. In the sense of a simplified assembly, it is desirable to arrange the centering elements in more than one plane in order to achieve a targeted tilting during the joining process and not to achieve the desired centering until after the joining process has ended. A drive train of a vehicle that can be operated in all-wheel drive is described in WO 2013/083243 A1. Disclosure of Invention The invention realizes an electric drive for a vehicle according to claim 1. Preferred developments are the subject matter of the dependent claims. The invention has the advantages. The invention is based on the idea of specifying an electric drive for a vehicle, in which, when the clamping device is inserted into a housing of the electric drive, the positioning and sealing properties in the clamping device for the sensor arrangement can be improved and the inclination of the clamping device in the housing or the inclination when inserted into the housing can be reduced or stabilized. According to the invention, an electric drive for a vehicle comprises a housing, an electric motor arranged in the housing, a sensor device with a clamping device, wherein the sensor device can be mounted in the housing and/or in the electric motor using the clamping device, wherein the clamping device comprises a guide region which can be positioned in a recess in the housing and/or in the electric motor and which comprises at least one support element which is located at a predetermined region of an outer surface of the guide region and with which the guide region can be centered in the recess, and wherein the guide region furthermore comprises at least one pressing element at a further predetermined region of the outer surface of the guide region, with which, with the guide region being inserted into the recess, the position can be compensated by pressing when positioning the guide region, wherein the pressing element and the support element are located at two different planes relative to one another. The sensor device can be, for example, a position sensor for a sensor magnet of a rotor of an electric machine. Furthermore, an application specific integrated circuit or in general a processor device can be present, which can be arranged together with the sensor in the inner region of the holding device or at least can be wired to the sensor. The recess can be a sensor hole in the housing. The positional tolerance can be a predetermined distance between the wall of the recess and a guide region (e.g. of the pressing element), the at least one pressing element being able to yield in amplitude with the distance, and the guide region being able to be positioned (centered) at a specific position (laterally) within the recess. Thus, for example, the centering of the sensor in the sensor bore can be achieved and influenced, for example, for the centering of the sealing element (for example an O-ring) and for the centering of the sensor element of the application-specific integrated circuit in the borehole and in this case relative to the rotor. The housing can be a housing of an electric drive shaft. According to a preferred embodiment of the electric drive, the guide region has a circular cross section. The circular cross section can be placed into a borehole for the sensor area. The sensor means can be represented as a rotational position sensor of the motor. The described sensor device with the clamping device can also be provided independently of the electric drive along with all the associated details. According to a preferred embodiment of the electric drive, the clamping device comprises a first O-ring and a second O-ring, which are arranged in two different planes at the outer surface of the guiding region. The plane of the O-ring or other sealing element can be partially or completely different from the plane of the pressing element and the supporting element. According to a preferred embodiment of the electric drive, the guide region comprises two pressing elements which are each arranged around the outer surface of the guide region at an angular distance of 120 ° relative to each other and relative to the support element. In this case, the outer surface of the guide region can be circ