A platformized automobile electric drive unit matching structure

Abstract

The utility model discloses a kind of platformization automobile electric drive unit cooperation structure, wherein motor assembly is sealedly connected with outer cover, flexible circuit board assembly, filter circuit board assembly and signal connector assembly are set between motor assembly and outer cover, and are connected with circuit board base respectively, and circuit board base is fixedly connected on motor assembly;Double-redundancy connector window is provided on outer cover, and metal terminal or connector passes through connector window;Each component is designed using double-redundancy structure, double-redundancy structure is used for two-way platform system, and single-path structure is used for single-path platform system;Motor assembly phase angle and stator rotor length can be adjusted, flexible circuit board assembly is flexibly folded to reduce electric drive unit volume.The technical scheme of the utility model realizes flexible adaptation of motor space, realizes extensible single / double-path platform switching, and realizes electromechanical parameter self-adaptive adjustment under different power configurations.

Description

Technical Field

[0001] This utility model relates to the field of steering control device technology, and in particular to a platform-based automotive electric drive unit cooperation structure. Background Technology

[0002] Currently, as automotive electric power steering systems evolve towards steer-by-wire architectures, the electronic control unit (ECU) has become the core hub of the steering system. In this context, circuit redundancy design has become crucial for meeting functional safety requirements. The circuit design must also adapt to the different safety performance requirements of different automakers.

[0003] However, the industry currently faces the following three technological contradictions:

[0004] (1) Spatial conflict

[0005] Dual-circuit redundancy design requires two independent circuits, and conventional PCB board sizes are difficult to fit into the narrow space at the bottom of the steering column. Some solutions attempt to increase the housing volume, but this poses a risk of interference with surrounding brake lines.

[0006] (2) Electromagnetic compatibility dilemma

[0007] The magnetic field generated by the high current in the drive circuit causes crosstalk to the microampere-level steering torque signal. Traditional shielding solutions use layered metal partitions, but this increases vertical space usage and cannot meet the trend of compactness.

[0008] (3) Lack of platformization

[0009] Every time a car manufacturer develops a new model, it needs to redesign the electronic control unit. When modifying the length of the motor stator and rotor to match the required assist torque, the circuit board mounting structure must be adjusted simultaneously. When changing the phase angle, the end cover connection mechanism must be remade.

[0010] While some technologies have attempted modularization, the following system-level conflicts between mechanical adaptability and electrical flexibility still exist:

[0011] (1) Dual-path / single-path switching requires replacing the entire circuit components, which lacks platform value;

[0012] (2) Adjustment of motor parameters still relies on mechanical processing and modification;

[0013] (3) There is a lack of engineered solutions for opening and closing the window of the sealed connector. Utility Model Content

[0014] To address the aforementioned issues, this utility model provides a platform-based automotive electric drive unit cooperating structure. Through the three-dimensional folding layout of flexible circuit boards, it achieves flexible adaptation of motor space. Through the dynamic architecture design of redundant circuits, it achieves scalable single-to-dual-path platform switching. Through the modular motor space design, it achieves adaptive adjustment of electromechanical parameters under different power configurations.

[0015] To achieve the above objectives, this utility model provides a platform-based automotive electric drive unit assembly structure, including: a motor assembly, an outer cover, a flexible circuit board assembly, a filter circuit board assembly, a signal connector assembly, and a circuit board base.

[0016] The motor assembly is sealed to the outer cover, and the flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly are disposed between the motor assembly and the outer cover;

[0017] The flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly are respectively connected to the circuit board base, and the circuit board base is fixedly connected to the motor assembly;

[0018] The outer cover is provided with a dual-redundant connector window, through which the metal terminals or connectors of the flexible circuit board assembly, the filter circuit board assembly and the signal connector assembly pass.

[0019] The flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly all adopt a dual-redundancy structure design. The dual-redundancy structure is used for the dual-channel platform system, and the single-channel structure is used for the single-channel platform system.

[0020] The phase angle and stator / rotor length of the motor in the motor assembly can be adjusted for different vehicle models, and the flexible circuit board assembly can be flexibly folded relative to the outer cover to reduce the volume of the electric drive unit.

[0021] In the above technical solution, preferably, the motor assembly and the outer cover are connected by a snap-fit ​​and sealed with sealant.

[0022] In the above technical solution, preferably, the flexible circuit board assembly includes a signal circuit board, a drive circuit board, and a flexible circuit board. The signal circuit board and the drive circuit board are respectively arranged on both sides of the flexible circuit board. The drive circuit board is connected to the bridge connector through a fisheye pin terminal. The signal circuit board and the drive circuit board can switch between single-channel and dual-channel structures according to the single-channel or dual-channel requirements of the platform system.

[0023] In the above technical solution, preferably, the connector windows on the outer cover are opened in a dual-channel platform system according to the single or dual-channel requirements of the platform system, and the redundant connector windows are covered in a single-channel platform system.

[0024] In the above technical solution, preferably, the metal terminal or connector passing through the connector window is sealed and fixed with sealant.

[0025] In the above technical solution, preferably, the filter circuit board assembly includes a filter circuit board, a power connector, a power connector and a power adapter. The power connector, the power connector and the filter circuit board are connected by soldering. The power connector is soldered to the bridge connector. The fisheye pin terminals of the power adapter are connected to the filter circuit board and the signal circuit board respectively.

[0026] In the above technical solution, preferably, the signal connector assembly is connected to the signal circuit board through the fisheye pin terminal of the internal metal terminal.

[0027] In the above technical solution, preferably, the drive circuit board is welded to the six-phase wires output by the motor assembly.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows: through the three-dimensional folding layout of the flexible circuit board, the motor space is flexibly adapted; through the dynamic architecture design of redundant circuits, the scalable single and dual-path platform switching is realized; and through the modular motor space design, the electromechanical parameters under different power configurations are adaptively adjusted. Attached Figure Description

[0029] Figure 1 This is a three-dimensional assembly structure diagram of a platform-based automotive electric drive unit mating structure disclosed in one embodiment of the present utility model;

[0030] Figure 2 This is an exploded structural diagram of a dual-path platform system disclosed in one embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the outer cover port of a dual-path platform system disclosed in one embodiment of the present invention;

[0032] Figure 4 This is an exploded structural diagram of a single-path platform system disclosed in one embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the outer cover port of a single-channel platform system disclosed in one embodiment of the present invention.

[0034] In the diagram, the correspondence between the components and the reference numerals is as follows:

[0035] 1. Motor assembly; 1-1. Support column; 2. Flexible circuit board assembly; 2-1. Drive circuit board; 2-2. Signal circuit board; 2-3. Flexible circuit board; 2-4. Bridge connector; 3. Circuit board base; 4. Screw; 5. Filter circuit board assembly; 5-1. Filter circuit board; 5-2. Power connector; 5-3. Power connector; 5-4. Power adapter; 6. Signal connector assembly; 7. Outer cover; 7-1, 7-2, 7-4. Connector window; 7-3. Clip; 8. Vent plug. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] The present invention will now be described in further detail with reference to the accompanying drawings:

[0038] like Figures 1 to 5 As shown, a platform-based automotive electric drive unit assembly structure provided by this utility model includes: a motor assembly 1, an outer cover 7, a flexible circuit board assembly 2, a filter circuit board assembly 5, a signal connector assembly 6, and a circuit board base 3.

[0039] The motor assembly 1 is sealed to the outer cover 7, and the flexible circuit board assembly 2, the filter circuit board assembly 5 and the signal connector assembly 6 are disposed between the motor assembly 1 and the outer cover 7.

[0040] The flexible circuit board assembly 2, the filter circuit board assembly 5, and the signal connector assembly 6 are respectively connected to the circuit board base 3 by screws 4, and the circuit board base 3 is fixedly connected to the motor assembly 1.

[0041] The outer cover 7 is provided with dual-redundant connector windows 7-1 (7-2, 7-4), through which the metal terminals or connectors of the flexible circuit board assembly 2, the filter circuit board assembly 5 and the signal connector assembly 6 pass.

[0042] The flexible circuit board assembly 2, the filter circuit board assembly 5, and the signal connector assembly 6 all adopt a dual-redundancy structure design. The dual-redundancy structure is used for the dual-channel platform system, and the single-channel structure is used for the single-channel platform system.

[0043] The phase angle and stator / rotor length of the motor in motor assembly 1 can be adjusted for different vehicle models, and the flexible circuit board assembly 2 can be flexibly folded relative to the outer cover 7 to reduce the volume of the electric drive unit.

[0044] In this embodiment, the flexible circuit board’s three-dimensional folding layout enables flexible adaptation of the motor space, the redundant circuit dynamic architecture design enables scalable single and dual-path platform switching, and the modular motor space design enables adaptive adjustment of electromechanical parameters under different power configurations.

[0045] Specifically, flexible circuit boards are folded during assembly to reduce the size of the circuit board assembly and avoid electromagnetic interference from the high current of the drive circuit board to the signal circuit board. Depending on the different requirements of different circuit platform systems, single or dual-path circuit designs can be switched, but the overall structural size remains basically the same.

[0046] The phase angle between the motor assembly 1 and the outer cover 7 can be adjusted according to different project requirements. By changing the phase angle and stator / rotor length of the motor assembly 1, the space and performance requirements of the steering system for different projects can be matched. Only some molds of the circuit board and the outer cover 7 need to be adjusted to realize electric drive units with dual-path and single-path high redundancy and low redundancy designs, thus achieving coverage of a product matrix with multiple vehicle models and diverse needs at a lower development cost.

[0047] In the above embodiments, preferably, the motor assembly 1 and the outer cover 7 are connected by a snap fastener 7-3 and sealed with sealant.

[0048] like Figure 2 and Figure 4 As shown, in the above embodiment, preferably, the flexible circuit board assembly 2 includes a signal circuit board 2-2, a drive circuit board 2-1, and a flexible circuit board 2-3. The signal circuit board 2-2 and the drive circuit board 2-1 are respectively arranged on both sides of the flexible circuit board 2-3. The drive circuit board 2-1 is connected to the bridge connector 2-4 through a fisheye pin terminal. The signal circuit board 2-2 and the drive circuit board 2-1 can switch between single-channel and dual-channel structures according to the single-channel or dual-channel requirements of the platform system.

[0049] like Figure 3 and Figure 5 As shown, in the above embodiment, preferably, the connector windows on the outer cover 7 are opened in a dual-channel platform system according to the single or dual-channel requirements of the platform system, and the redundant connector windows are covered in a single-channel platform system.

[0050] Specifically, in the dual-circuit redundancy design, all interfaces on the outer cover 7 are left open, and the power supply, information communication, and torque information input interfaces in the two circuits are symmetrically arranged to meet the requirements for high safety performance; in the single-circuit system, the outer cover 7 is sealed with the extra interfaces, which can meet the redundancy design requirements of lower requirements.

[0051] According to the platform-based automotive electric drive unit structure disclosed in the above embodiments, for the platform-based design of circuits with two different redundancy designs (dual-path and single-path), the dual-redundant filter circuit board is adjusted to a single-path filter circuit board, and the vehicle power input is adjusted to a single path; some metal terminals and injection-molded structures are removed from the signal connectors; three of the six connector windows of the outer cover 7 are blocked, leaving three connector windows for one power input, one vehicle signal input, and one steering system torque sensor signal input; the dual-redundant flexible circuit board 2-3 is adjusted to a single-path flexible circuit board 2-3. This platform-based design scheme only requires adjusting two circuit boards and part of the mold of the outer cover 7 to realize electric drive units with two different redundancy designs (dual-path and single-path).

[0052] In the above embodiment, preferably, the metal terminal or connector passing through the connector window 7-1 (7-2, 7-4) is sealed and fixed with sealant, so as to simultaneously realize the signal data communication and sealing requirements.

[0053] In the above embodiment, preferably, the filter circuit board assembly 5 includes a filter circuit board 5-1, a power connector 5-2, a power connector 5-3, and a power adapter 5-4. The power connector 5-2, the power connector 5-3, and the filter circuit board 5-1 are connected by soldering. The power connector 5-3 is soldered to the bridge connector 2-4. The fisheye pin terminals of the power adapter 5-4 are connected to the filter circuit board 5-1 and the signal circuit board 2-2, respectively.

[0054] In the above embodiment, preferably, the signal connector assembly 6 is connected to the signal circuit board 2-2 through the fisheye pin terminal of the internal metal terminal.

[0055] In the above embodiment, preferably, the drive circuit board 2-1 is welded to the six-phase line output by the motor assembly 1.

[0056] In the above embodiment, preferably, the outer cover 7 is provided with a vent hole, and a vent plug 8 is provided in the vent hole. The vent plug 8 and the vent hole are sealed by a sealing ring and connected by a snap-fit ​​structure of the vent plug 8.

[0057] The motor assembly 1 has three support columns 1-1, and the circuit board base 3 is connected to the support columns 1-1 of the motor assembly 1 by screws 4.

[0058] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A platform-based automotive electric drive unit mating structure, characterized in that, include: Motor assembly, outer cover, flexible circuit board assembly, filter circuit board assembly, signal connector assembly, and circuit board base; The motor assembly is sealed to the outer cover, and the flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly are disposed between the motor assembly and the outer cover; The flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly are respectively connected to the circuit board base, and the circuit board base is fixedly connected to the motor assembly; The outer cover is provided with a dual-redundant connector window, through which the metal terminals or connectors of the flexible circuit board assembly, the filter circuit board assembly and the signal connector assembly pass. The flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly all adopt a dual-redundancy structure design. The dual-redundancy structure is used for the dual-channel platform system, and the single-channel structure is used for the single-channel platform system. The phase angle and stator / rotor length of the motor in the motor assembly can be adjusted for different vehicle models, and the flexible circuit board assembly can be flexibly folded relative to the outer cover to reduce the volume of the electric drive unit.

2. The platform-based automotive electric drive unit mating structure according to claim 1, characterized in that, The motor assembly is connected to the outer cover by a snap-fit ​​connection and sealed with sealant.

3. The platform-based automotive electric drive unit mating structure according to claim 1, characterized in that, The flexible circuit board assembly includes a signal circuit board, a drive circuit board, and a flexible circuit board. The signal circuit board and the drive circuit board are respectively arranged on both sides of the flexible circuit board. The drive circuit board is connected to the bridge connector through a fisheye pin terminal. The signal circuit board and the drive circuit board can switch between single-channel and dual-channel structures according to the single-channel or dual-channel requirements of the platform system.

4. The platform-based automotive electric drive unit mating structure according to claim 1, characterized in that, According to the single or dual-channel requirements of the platform system, the connector windows on the outer cover are all open in the dual-channel platform system, and the redundant connector windows are covered in the single-channel platform system.

5. The platform-based automotive electric drive unit mating structure according to claim 1, characterized in that, The metal terminals or connectors passing through the connector window are sealed and secured with sealant.

6. The platform-based automotive electric drive unit mating structure according to claim 3, characterized in that, The filter circuit board assembly includes a filter circuit board, a power connector, a power connector, and a power adapter. The power connector, the power connector, and the filter circuit board are connected by soldering. The power connector is soldered to the bridge connector. The fisheye pin terminals of the power adapter are connected to the filter circuit board and the signal circuit board, respectively.

7. The platform-based automotive electric drive unit mating structure according to claim 3, characterized in that, The signal connector assembly is connected to the signal circuit board via a fisheye pin terminal of an internal metal terminal.

8. The platform-based automotive electric drive unit mating structure according to claim 3, characterized in that, The drive circuit board is welded to the six-phase lines output by the motor assembly.

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