Electric drive for vehicle

Abstract

The invention relates to an electric drive (10) for a vehicle, comprising: a housing (G); an electric machine (EM), which is arranged in the housing (G); the invention relates to a sensor device (S) with a clamping device (HV), the sensor device (S) being mountable in a housing (G) by means of the clamping device (HV), the clamping device (HV) comprising a guide region (FB) which can be positioned in a recess (A) in the housing (G), and the guide region (FB) comprising at least one support element (SM), the support element (SM) being arranged in the housing (G). The guide region (FB) has at least one support element which is located at a predetermined region of the outer surface of the guide region (FB), and by means of which the guide region (FB) can be centered in the recess (A), and wherein the guide region (FB) is supported by the at least one support element. According to the invention, the guide region (FB) further comprises at least one pressing element (VP) on a further predetermined region of the outer surface of the guide region (FB), by means of which, when the guide region (FB) is inserted into the recess (A), a positional tolerance can be compensated by pressing during positioning of the guide region (FB), the pressing element (VP) and the support element (SM) are located at two different planes of the guide region (FB) with respect to each other.

Description

Technical Field

[0001] This invention relates to an electric drive device for vehicles. Background Technology

[0002] In typical electric drive devices, sensors can be secured to the housing of the electric drive shaft using specific clamping devices. In typical designs, these clamping devices are made of plastic and are fitted into recesses within the housing of the electric drive shaft. To ensure proper securing and centering of the plastic clamping devices within these recesses, support and sealing elements are beneficial between the clamping devices and the housing of the electric drive shaft. In typical clamping devices, the support or centering elements can be arranged in a plane.

[0003] In the sense of simplified assembly, it is desirable to arrange centering elements in more than one plane to achieve targeted tilting during the joining process and to achieve the desired centering only after the joining process is completed.

[0004] A drive system for a vehicle capable of all-wheel drive is described in WO 2013 / 083243 A1. Summary of the Invention

[0005] The present invention provides an electric drive device for a vehicle according to claim 1.

[0006] The preferred improvement is the subject of the dependent claims.

[0007] Advantages of the present invention.

[0008] The present invention is based on the concept of describing an electric drive device for a vehicle, wherein when a clamping device is placed into the housing of the electric drive device, the positioning and sealing characteristics of the clamping device for the sensor device can be improved, and the tilt of the clamping device in the housing or when placed into the housing can be reduced or stabilized.

[0009] According to the present invention, an electric drive device for a vehicle includes: a housing; a motor disposed in the housing; and a sensor device with a clamping device, wherein the sensor device can be mounted in the housing and / or the motor using the clamping device, wherein the clamping device includes a guide region capable of being positioned in a recess in the housing and / or the motor, and the guide region includes at least one support element located at a predetermined area on the outer surface of the guide region, and the guide region can be centered in the recess using the at least one support element, and wherein the guide region further includes at least one pressing element at another predetermined area on the outer surface of the guide region, wherein, when the guide region is placed in the recess, positional tolerances can be compensated by pressing during positioning of the guide region using the at least one pressing element, wherein the pressing element and the support element are located at two planes of the guide region that are different from each other.

[0010] The sensor device can be, for example, a position sensor for the rotor magnet of a motor. Furthermore, an application-specific integrated circuit (ASIC) or, generally, a processor device, can be present, which can be arranged together with the sensor in the internal area of ​​the clamping device, or at least wired to the sensor. The notch can be a sensor hole in the housing.

[0011] The positional tolerance can be a predetermined distance between the wall of the recess and a guide region (e.g., of an extrusion element), the at least one extrusion element being able to yield by the magnitude of said distance, and the guide region being able to be positioned (centered) (laterally) at a specific location within the recess. Thus, for example, centering of a sensor in a sensor hole can be obtained and influenced, such as centering for a sealing element (e.g., an O-ring), and centering for a sensor element of an application-specific integrated circuit in a drilled hole and thererelative to the rotor.

[0012] The housing can be the housing of an electrically driven shaft.

[0013] According to a preferred embodiment of the electric drive device, the guide region has a circular cross-section.

[0014] A circular cross-section can be inserted into a borehole targeting the sensor area.

[0015] The sensor device can be represented as a rotational position sensor for a motor.

[0016] The described sensor device with clamping equipment can also be provided along with all the accessories without relying on an electric drive device.

[0017] According to a preferred embodiment of the electric drive device, the clamping device includes a first O-ring and a second O-ring, which are arranged in two different planes on the outer surface of the guide area.

[0018] The plane of the O-ring or other sealing element may be partially or completely different from the plane of the compression element and the support element.

[0019] According to a preferred embodiment of the electric drive device, the guide region includes two extrusion elements 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.

[0020] In this case, the outer surface of the guide region can be circular. This distribution of the extrusion elements allows for a symmetrical tolerance relative to the center point of the guide region for centering.

[0021] According to a preferred embodiment of the electric drive device, the guide region includes additional support elements arranged in the plane of the extrusion element and arranged at a predetermined angle in the rotational direction of the outer surface of the guide region.

[0022] This additional support element prevents or reduces rotation of the clamping device within the recess caused by the tightening process. By preventing or reducing rotation, eccentric compression of the sealing element within the recess can be avoided or reduced, and radial disengagement of the sensor device within the recess can also be prevented or reduced.

[0023] This additional support element can be integrally formed with the guide region, or it can consist of a separate element and be surrounded within the guide region. The additional support element can be arranged in the same plane as one of the other support elements or in a different plane.

[0024] According to a preferred embodiment of the electric drive device, the at least one extrusion element is a teardrop-shaped elastic element surrounded in a guide region.

[0025] According to a preferred embodiment of the electric drive device, the clamping device includes a support flange region that extends perpendicularly to the outer surface of the guide region, and when the clamping device is inserted, the support flange region can cover the recess at least in the edge region of the recess.

[0026] In a preferred embodiment of the electric drive device, the support element is in contact with metal.

[0027] According to a preferred embodiment of the electric drive device, the clamping device includes an enclosure for cable connection and for a sensor device.

[0028] According to a preferred embodiment of the electric drive device, the clamping device includes a three-point support, which is achieved by a sleeve in a fastening recess in the support flange region and by two protruding regions on the side of the support flange facing the housing.

[0029] According to a preferred embodiment of the electric drive device, the three-point supported sleeve and the two protruding regions are spaced 120° apart from each other in the rotational direction of the support flange region.

[0030] Further features and advantages of embodiments of the present invention will become apparent from the following description with reference to the accompanying drawings. Attached Figure Description

[0031] The invention will now be explained in more detail with reference to the embodiments shown in the accompanying drawings.

[0032] Figure 1a , Figure 1b and Figure 1c A schematic diagram of a clamping device for a sensor device in an electrically driven device according to an embodiment of the present invention is shown. Figure 2a A schematic diagram of an electric drive device according to an embodiment of the present invention is shown; Figure 2b A schematic diagram of an electric drive device according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of a pressing element in a clamping device of an electrically driven apparatus according to an embodiment of the present invention is shown; and Figure 4 Showing from Figure 3 A schematic cross-sectional view of the view. Detailed Implementation

[0033] In the figures, the same reference numerals refer to the same or functionally identical elements.

[0034] Figure 1a A schematic diagram of a clamping device for a sensor device in an electrically driven device according to an embodiment of the present invention is shown.

[0035] The clamping device HV for a sensor device can include a guide region FB, which preferably has a circular periphery, the guide region being able to be positioned in a recess, and the guide region FB including at least one support element SM located at a predetermined area on the outer surface of the guide region FB, and the guide region FB being able to be centered in the recess by means of the at least one support element, and wherein the guide region FB further includes at least one pressing element VP at another predetermined area on the outer surface of the guide region FB, the at least one pressing element being able to compensate for positional tolerances by pressing during positioning of the guide region FB when the guide region FB is placed in the recess, wherein the pressing element VP and the support element SM can be located at two planes of the guide region FB that are different from each other, and preferably at different areas on the circumference of the guide region.

[0036] according to Figure 1a The side view shows the extrusion element VP arranged on the visible side and relative to the support element SM. At least one additional extrusion element VP can also be arranged on the back side (not shown) of the guide region, relating to the periphery of the guide region, advantageously arranged at 120° to each other in the circumferential direction of the guide region. The extrusion element can be elastic and teardrop-shaped.

[0037] The clamping device HV can include a first O-ring O1 and a second O-ring O2 in the guide area FB, and the first O-ring and the second O-ring can be arranged in two different planes on the outer surface of the guide area FB.

[0038] According to the design of this invention, centering can be achieved through two planes, which can reduce the engagement force by targeted tilting of the sensor during placement in the guide area, i.e., during the engagement process. Once the flange support of the supporting flange AF is reached, no further tilting occurs. The arrangement of the extrusion element VP can be present directly or at a specific height below the flange AF, and then extrusion can be performed directly before the end of the assembly process. In this way, a short pressing displacement of a few millimeters can be obtained, thus reducing the risk of chip formation / length and simplifying assembly.

[0039] The guide region FB may include additional support elements AS, which may be arranged in or outside the plane of the extrusion element VP, and may be arranged at a predetermined angle in the rotational direction of the outer surface of the guide region FB.

[0040] In typical implementations, unilateral fixation (e.g., tightening) is possible. Additionally, the limited reinforceability of the clamping device (determined by the material and / or geometry) can result in bending of the flange near the fixation point (e.g., tightening) under external forces.

[0041] Therefore, in such typical implementations, undesirable axial and radial dislocation of the sensor unit relative to the sensor element (e.g., a magnet) can occur.

[0042] Furthermore, in such typical implementations, this bending can cause undesirable relative movement and thus eccentric compression of the sealing element (O-ring).

[0043] In typical implementations, multiple sensor fixations can be performed to suppress these effects.

[0044] The clamping device HV can have pin or screw connections (made by) within or outside the support flange AF. Figure 2a (As can be seen) the fastening recess BA, through which the pin or screw can be fastened in the housing of the electric drive device.

[0045] A sleeve B can be introduced within the fastening recess BA. Support elements SM can then be arranged radially opposite to the fastening recess BA at the guide region FB. Therefore, advantageous, long-lasting, and bend-resistant support for the sensor in the borehole can be obtained by maximizing the distance between the support element's surface and the fastening recess BA (with pin / screw). Furthermore, tolerance compensation can be achieved in a targeted manner using a compression element VP, which is intentionally designed to be easily deformable, and is obtained as a teardrop-shaped compression element (the compression element can be oriented with its tip pointing downwards).

[0046] By orienting the tip in the engagement direction, the longest possible guide bevel can be achieved, resulting in simplified assembly and reduced chip formation.

[0047] This arrangement of a teardrop-shaped clamping element VP, which is intentionally designed to be easily deformable or worn, above the upper sealing element (O-ring O1), prevents chip buildup in the sealing area, such as due to the formation and accumulation of particles opposite to the engagement direction.

[0048] In the upper region, the clamping device HV may have an opening SA for a feasible plug-in connection. Alternatively, the clamping device HV may also be inserted into a recess in the housing of the electric drive unit using a cable connection already present in the clamping device HV.

[0049] Figure 1b Another feasible implementation is shown Figure 1a The arrangement includes a clamping device comprising a three-point support DPA, which is achieved by a sleeve B in a fastening recess BA within a support flange region AF and by two protruding regions FP (as foot points) on the side of the support flange AF facing the housing. Here, the sleeve B and the two protruding regions FP of the three-point support DPA are spaced 120° apart from each other in the rotational direction of the support flange region AF.

[0050] Figure 1c The sectional view shows Figure 1b The arrangement.

[0051] Figure 2a and Figure 2b Schematic diagrams of an electric drive device according to one embodiment of the present invention are shown.

[0052] exist Figure 2a The cross-sectional view shows that two O-rings (O1 or O2) can abut against the inner wall of the recess, and the raised area FB-P of the guide area can form a specific residual gap at its edge for the wall of the recess, except in those locations where the extrusion element VP (and support element SM) are arranged, which can touch the wall of the recess for tolerance compensation.

[0053] With the guide area FB inserted and the clamping device HV secured by fastening elements (pins / screws), the desired, defined abutment of the support flange AF is achieved via a three-point support DPA, preferably located at the housing G. This three-point support DPA is achieved through a sleeve B inserted into the fastening recess BA and two protruding areas FP on the side of the support flange AF facing the housing G. Thus, the support flange AF can be spaced at a specific height from the upper side of the housing G, in addition to the three support elements DPA.

[0054] exist Figure 2b A similar arrangement is shown, the difference being that a magnet M for identification by a sensor S is shown on the rotor of the motor EM.

[0055] Figure 3 A schematic diagram of a pressing element in a clamping device of an electrically driven device according to an embodiment of the present invention is shown.

[0056] exist Figure 3 The diagram shows a view of the extrusion element VP at the guide region FB, wherein the elastic extrusion element VP can be made of a material that is easily deformable and can be implemented in a teardrop shape. Here, the teardrop-shaped extrusion element can be oriented with its tip pointing downwards.

[0057] Figure 4 Showing from Figure 3A schematic cross-sectional view of the view.

[0058] exist Figure 4 In, relative to Figure 3 A lateral section through the housing G and the guide region FB is shown, particularly when the guide region is placed within a recess in the housing G. In this position, a raised area FB-P of the guide region FB can be arranged, and an extrusion element VP at the tip of this raised area presses against the wall of the housing from the inside, deforming the extrusion element VP for tolerance compensation.

[0059] Although the invention has been fully described above with reference to preferred embodiments, the invention is not limited thereto, but can be modified in a variety of ways and methods.

Claims

1. An electric drive unit (10) for a vehicle, comprising: - Housing (G); - An electric motor (EM), which is arranged in the housing (G); - A sensor device (S) with a clamping device (HV), wherein the sensor device (S) can be mounted in a housing (G) and / or a motor (EM) using the clamping device (HV), wherein the clamping device (HV) includes a guide region (FB) locating in a recess (A) in the housing (G) and / or the motor (EM), and the guide region (FB) includes at least one support element (SM) located at a predetermined area on the outer surface of the guide region (FB), and utilizing the at least one support element... A support element, wherein the guide region (FB) is centered in the recess (A), and wherein the guide region (FB) further includes at least one extrusion element (VP) at another predetermined area on the outer surface of the guide region (FB), wherein, when the guide region (FB) is placed into the recess (A), positional tolerances can be compensated by extrusion during positioning of the guide region (FB) using the at least one extrusion element, wherein the extrusion element (VP) and the support element (SM) are located at two planes of the guide region (FB) that are different from each other.

2. The electric drive device (10) according to claim 1, wherein, The guide region (FB) has a circular cross-section.

3. The electric drive device (10) according to claim 1 or 2, wherein, The clamping device (HV) includes a first O-ring (O1) and a second O-ring (O2), which are arranged in two different planes on the outer surface of the guide region (FB).

4. The electric drive device (10) according to any one of claims 1 to 3, wherein, The guide region (FB) includes two extrusion elements (VPs) arranged around the outer surface of the guide region (FB) at an angular spacing of 120° relative to each other and relative to the support element (SM).

5. The electric drive device (10) according to any one of claims 1 to 4, wherein, The guide region (FB) includes an additional support element (AS) arranged in the plane of the extrusion element (VP) and at a predetermined angle in the rotational direction of the outer surface of the guide region (FB).

6. The electric drive device (10) according to any one of claims 1 to 5, wherein, The at least one extrusion element (VP) is a teardrop-shaped elastic element, which is surrounded in the guide region (FB).

7. The electric drive device (10) according to any one of claims 1 to 6, wherein, The clamping device (HV) includes a support flange region (AF) that extends perpendicularly to the outer surface of the guide region (FB), and when the clamping device (HV) is inserted, the recess (A) can be covered at least in the edge region of the recess (A) using the support flange region.

8. The electric drive device (10) according to claim 7, wherein, The clamping device (HV) includes a three-point support (DPA) which is achieved by a sleeve (B) in a fastening recess (BA) in the support flange region (AF) and by two protruding regions (FP) on the side of the support flange (AF) facing the housing (G).

9. The electric drive device (10) according to claim 8, wherein, The sleeve (B) and two protruding regions (FP) of the three-point support (DPA) are spaced 120° apart from each other in the rotational direction of the support flange region (AF).

10. The electric drive device (10) according to any one of claims 1 to 9, wherein, The support element (SM) comprises metal.

11. The electric drive device (10) according to any one of claims 1 to 10, wherein, The clamping device (HV) includes a surrounding portion for cable connection and for the sensor device (S).

Images