Motor assembly

Abstract

The utility model provides a motor assembly. The motor assembly comprises a wire harness, a motor stator and a motor bearing plate, the motor stator is fixed on the motor bearing plate, and the wire harness comprises a grounding wire. According to the utility model, the grounding terminal of the grounding wire is fixed on the motor bearing plate through a single screw, passes through the motor bearing plate through the screw and is electrically connected with the stator lamination which forms the motor stator or is electrically connected with the motor bearing plate through the screw. According to the utility model, grounding processing of the motor is realized through the single screw, so that the electromagnetic compatibility performance of the motor is improved, a grounding wire is prevented from being independently led out from the motor stator, the number of parts is reduced, and the manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The present utility model relates to the field of vehicles. In particular, the present utility model relates to a vehicle motor assembly for a cooling fan module, for example. BACKGROUND

[0002] A vehicle motor assembly comprises a motor stator and a motor carrier plate, other motor components are housed within the motor stator, the motor carrier plate is used to support and fix the motor stator, and the phase winding leads of the motor stator extend from the motor carrier plate and are connected to the corresponding terminals of the wiring harness, usually by welding.

[0003] In order to meet the electromagnetic compatibility requirements, the power supply line is provided with a grounding line, and the motor needs to be grounded. The current motor carrier plate is usually a metal or plastic molded part, and for the metal carrier plate, there is a plastic insulating plate between the metal carrier plate and the wiring harness. In order to ground, the grounding line needs to pass through the plastic insulating plate and be connected to the metal carrier plate. If the carrier plate is made of plastic, the grounding line needs to be led out from the motor stator and pass through the motor carrier plate so that the grounding line of the wiring harness is connected to the stator lamination to improve the electromagnetic compatibility performance of the motor. SUMMARY

[0004] To this end, the present utility model proposes a novel grounding method. According to the first embodiment, the motor assembly comprises a wiring harness, a motor stator and a motor carrier plate. The motor stator is fixed to the motor carrier plate, the wiring harness comprises a grounding line, the grounding terminal of the grounding line is fixed to the motor carrier plate by a single screw, and is electrically connected to the stator lamination constituting the motor stator through the screw passing through the motor carrier plate at the same time or is electrically connected to the motor carrier plate itself through the screw at the same time.

[0005] According to the first embodiment, the motor carrier plate is configured as an electrically conductive component (for example, a metal component), and the motor assembly further comprises an electrically insulating adapter carrier plate fixed to the motor carrier plate, the wiring harness is fixed to the adapter carrier plate, and the grounding terminal of the grounding line is fixed to the motor carrier plate and the adapter carrier plate and is electrically connected to the motor carrier plate itself through the screw passing through the adapter carrier plate.

[0006] According to the second embodiment, the motor carrier plate is configured as an electrically insulating component (for example, a plastic component), the wiring harness is fixed to the motor carrier plate, and the motor carrier plate is provided with a threaded hole for the screw to pass through, so that the grounding terminal of the grounding line is electrically connected to the stator lamination through the screw passing through the motor carrier plate.

[0007] According to the second embodiment, the phase winding leads of the motor stator extend from the motor carrier plate, and the wiring harness further comprises a winding connection line, which is connected to the phase winding leads of the motor stator respectively.

[0008] According to an embodiment, the grounding terminal configuration is generally circular, but is not limited to a circular shape. This arrangement facilitates the screw passing through to be threadably connected to a metal motor carrier plate or through a plastic motor carrier plate to connect with the stator lamination.

[0009] According to a first embodiment, the motor carrier plate is provided with a threaded hole, and the adapter carrier plate is provided with a through hole at a corresponding position for the screw to pass through to engage with the threaded hole of the motor carrier plate.

[0010] According to a first embodiment, the adapter carrier plate is provided with a lower recess positioned in the through hole at a corresponding position of the motor carrier plate. This arrangement facilitates positioning of the adapter carrier plate on the motor carrier plate.

[0011] According to a first embodiment, the phase winding leads of the motor stator extend from the motor carrier plate and the metal carrier plate, and the wire harness further comprises a winding connection wire connected with the phase winding leads of the motor stator respectively. To this end, the lower recess is formed in a ring-shaped configuration so that the winding leads extend out.

[0012] Through the above arrangement, in cooperation with the motor grounding wire tab, the grounding wire and the metal part of the motor are connected by a single screw to achieve the grounding purpose.

[0013] The utility model discloses a motor grounding scheme for motor carrier plates of different materials through a single screw, especially for motor carrier plates of plastic material, avoids separately leading out a grounding wire from the motor stator, thereby reducing the number of components and lowering manufacturing cost. Moreover, the grounding structure of the utility model is simple, easy to manufacture and low in cost. BRIEF DESCRIPTION OF DRAWINGS

[0014] Embodiments of the utility model will be explained in more detail in the drawings, in which:

[0015] Figure 1 is a schematic perspective view of a motor assembly according to an embodiment of the utility model;

[0016] Figure 2 is Figure 1 is a schematic enlarged perspective view of the grounding region in

[0017] Figure 3 is a schematic perspective view of a motor assembly according to another embodiment of the utility model;

[0018] Figure 4 is Figure 3 is a schematic enlarged perspective view of the grounding region in

[0019] In the drawings, the embodiments of the utility model are shown in a simplified manner for the sake of clarity. The drawings do not necessarily show to scale. Like drawing references designate similar parts in the drawings. DETAILED DESCRIPTION

[0020] Figure 1 A motor assembly 1 according to an embodiment of the present invention is shown. As shown, the motor assembly 1 includes a motor stator 10 and a motor carrier plate 20. Other motor components (not shown) are housed within the motor stator 10, which is secured to the motor carrier plate 20. Furthermore, the motor stator 10 is provided with locating pins 11, and the motor carrier plate 20 has corresponding locating holes 21 to facilitate assembly of the two components. The motor carrier plate 20 is a molded plastic component.

[0021] Motor assembly 1 also includes a wiring harness 30, which comprises a sleeve 31 and three winding connection wires 32. Each winding connection wire 32 has a connection terminal 33 for welding to a corresponding one of the three-phase winding leads 40 of motor stator 10. Furthermore, to meet electromagnetic compatibility requirements, wiring harness 30 also includes a grounding wire 34 with a grounding terminal 35. Grounding wire 34 passes through motor carrier plate 20 via screws 36 and is electrically connected to the stator laminations that constitute motor stator 10. In this example, sleeve 31 does not need to completely cover all cables, so that the individual cables of the wiring harness are exposed for easier connection.

[0022] The motor carrier plate 20 is provided with a plurality of slots for fixing the winding connection wires 32 and the ground wires 34 of the wiring harness 30. Figure 1 In the embodiment, starting from the vicinity of the connection terminal 33 and along the extension direction of the winding connection wire 32, three groups of slots are provided on the motor carrier plate 20, namely slots 22, 23 and 24, each group of slots has three slots, which are used to fix the three winding connection wires 32 respectively. For the grounding wire 34, a slot 25 is provided on the motor carrier plate 20. In addition, near the sleeve 31, the motor carrier plate 20 is provided with a wire harness clamp 26, which is a hinged structure so that it can be opened and closed. When the wire harness clamp 26 is closed, the cable can be tightened to prevent external force of the cable from being transmitted to the welding point, and at the same time, an optional mechanical fixing position is provided. If necessary, the wire harness clamp 26 can be locked by a screw 27 to further fix the wire harness 20 and increase the reliability of the design.

[0023] At the locations where the connecting terminals 33 and the winding leads 40 are to be welded, the motor carrier plate 20 is provided with a potting area 28, which is constructed as an annular structure protruding from the surface of the motor carrier plate 20 to define a groove to facilitate potting after welding so that the welding location is sealed and insulated.

[0024] The slots 22 are separated from each other and are respectively adjacent to three potting areas 28. The slots 23 are also separated from each other, while the slots 24 are adjacent to each other. The slots 22, 23 and 24 are spaced apart from each other.

[0025] Figure 2A schematic diagram of the grounding area of ​​motor assembly 1 is shown. A grounding terminal 35 of a grounding wire 34 in a wiring harness 30 is electrically connected to the stator laminations that make up the motor stator via a single screw 36 that passes through a threaded hole in the motor carrier plate 20, thereby grounding the motor stator. The screw 36 also secures the grounding terminal 35 to the motor carrier plate 20.

[0026] Figure 3 A motor assembly 100 according to another embodiment of the present invention is shown. Unlike the motor assembly 1 of the first embodiment, the motor carrier plate 120 is a metal component, and the motor assembly 100 further includes a plastic adapter carrier plate 150 with slots for securing the winding connection wires and the grounding wire 134. These slots are positioned within corresponding through-holes 120a on the motor carrier plate 120 via an annular recess 151. The grounding terminal 135 of the grounding wire 134 of the wiring harness 130 is electrically connected to the metal carrier plate 150 itself via screws 136, rather than the grounding terminal of the grounding wire being directly electrically connected to the stator laminations of the motor stator via screws. Furthermore, the adapter carrier plate 150 has a tab 151 with a through-hole formed therein. The motor carrier plate 120 has threaded holes 120b formed at corresponding locations, allowing additional screws to pass through and engage with the threaded holes 120b to secure the adapter carrier plate 150 to the motor carrier plate 120.

[0027] Figure 4 The figure shows a schematic diagram of the grounding area of ​​the motor assembly 100. The grounding terminal 135 of the grounding wire 134 of the wiring harness 130 is configured in a circular ring shape. A single screw 136 passes through the grounding terminal 135 and a through-hole provided on the adapter carrier plate 150 and is screwed into a threaded hole provided on the metal motor carrier plate 120, thereby fixing the grounding terminal 135 to the metal motor carrier plate 120 and electrically connecting the grounding terminal 135 to the metal motor carrier plate 120. Therefore, the metal parts of the motor are grounded by directly electrically connecting the grounding terminal 135 and, therefore, the grounding wire 134 to the metal motor carrier plate 120.

[0028] The embodiments described herein are for illustrative purposes only. In some cases, the features disclosed in this utility model may be used independently of other features. On the other hand, when necessary, the features disclosed in this utility model may be combined to provide various combinations. Therefore, this utility model is not limited to the embodiments shown herein. Based on the embodiments of this utility model, those skilled in the art may obtain other embodiments without creative work, and these embodiments also fall within the scope of protection of this utility model.

Claims

1. A motor assembly, comprising a wiring harness, a motor stator, and a motor carrier plate, wherein the motor stator is fixed to the motor carrier plate, and the wiring harness includes a ground wire, characterized in that: The grounding terminal of the grounding wire is fixed to the motor carrier plate by a single screw and is electrically connected to the stator laminations constituting the motor stator or to the motor carrier plate itself through the screw.

2. The motor assembly according to claim 1, wherein: The motor assembly also includes an electrically insulating adapter carrier plate fixed to the motor carrier plate, the wiring harness is fixed to the adapter carrier plate, and the grounding terminal of the grounding wire is fixed to the motor carrier plate through the adapter carrier plate by the screw and is electrically connected to the motor carrier plate itself.

3. The motor assembly according to claim 1, wherein: The wiring harness is fixed to the motor carrier plate, and the motor carrier plate is provided with threaded holes for the screws to pass through, so that the grounding terminal of the grounding wire passes through the motor carrier plate through the screws and is electrically connected to the stator laminations.

4. The motor assembly according to claim 2, wherein: The motor carrier plate is provided with threaded holes, and the adapter carrier plate is provided with through holes at corresponding positions for the screws to pass through, so that the screws pass through the adapter carrier plate and engage with the threaded holes of the motor carrier plate.

5. The motor assembly according to any one of claims 1 to 4, characterized in that: The ground terminal is configured in a circular ring shape.

6. The motor assembly according to any one of claims 2 and 4, characterized in that A lower recess is provided on the adapter carrier plate and is positioned in a through hole at a corresponding position on the motor carrier plate.

7. The motor assembly according to claim 6, wherein: The lower recess is formed in an annular configuration.

8. The motor assembly according to claim 2, wherein: The motor carrier plate is designed as an electrically conductive component.

9. The motor assembly according to claim 3, wherein: The motor carrier plate is designed as an electrically insulating component.

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