Steer-by-wire system full-redundancy PPK assembly

Abstract

A full-redundancy PPK assembly of a steer-by-wire system comprises a redundancy motor, an aluminum supporting plate is arranged on the end face, away from the output end, of a shell of the redundancy motor through stand columns, a PCB power board is arranged on the shell, below the aluminum supporting plate, of the redundancy motor, and the PCB power board is connected with a plurality of power input terminals of the redundancy motor. The upper side and the lower side of the aluminum supporting plate are respectively provided with a PCB filter board and a PCB control board, the PCB power board, the PCB control board and the PCB filter board are connected in sequence, the PCB filter board is provided with two power connectors, two sensor connectors and two signal connectors, the outer side of the aluminum supporting plate is provided with a power copper bar, and the power copper bar is connected with the PCB power board and the PCB filter board. According to the PPK assembly, full redundancy design is adopted, all redundant components are reasonably arranged, and the PPK assembly has the advantages of being high in safety, easy and convenient to install, high in practicability and the like.

Description

Technical Field

[0001] This utility model relates to a fully redundant PPK assembly for a steer-by-wire system, belonging to the technical field of automotive steer-by-wire systems. Background Technology

[0002] With the development of steer-by-wire technology in automotive steering systems, the shift from electric power steering to steer-by-wire is inevitable, and fully redundant steer-by-wire systems are typically required for high-level autonomous driving. Currently, most steer-by-wire systems on the market are non-redundant or semi-redundant, which suffers from insufficient safety. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned technical deficiencies of existing automotive steer-by-wire systems by providing a fully redundant PPK assembly for steer-by-wire systems. This PPK assembly adopts a fully redundant design and rationally arranges the various redundant components, offering advantages such as high safety, easy installation, and strong practicality.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A fully redundant PPK assembly for a steer-by-wire system is characterized by: including a redundant motor; an aluminum support plate is mounted on the end face of the redundant motor housing facing away from the output end via a column; a PCB power board is mounted on the redundant motor housing below the aluminum support plate; the PCB power board is connected to multiple power input terminals of the redundant motor; a PCB filter board and a PCB control board are respectively mounted on the upper and lower sides of the aluminum support plate; the PCB power board, PCB control board, and PCB filter board are connected sequentially; two power connectors, two sensor connectors, and two signal connectors are mounted on the PCB filter board; a power copper busbar is provided on the outer side of the aluminum support plate, and the power copper busbar is connected to the PCB power board and the PCB filter board.

[0006] By adopting the above technical solution, a fully redundant PPK assembly for a steer-by-wire system is provided. The PPK assembly adopts a fully redundant design and the redundant components are reasonably arranged, which has the advantages of high safety, simple installation and strong practicality.

[0007] A further feature of this invention is that an aluminum support plate is fixed to the housing of the redundant motor by three or more columns arranged in a ring on the housing.

[0008] By adopting the above technical solution, multiple columns evenly distributed in a ring are used to fix the aluminum support plate, which effectively ensures the structural stability of the aluminum support plate and the components attached to it.

[0009] A further feature of this invention is that the PCB power board is positioned in the middle of all the columns, the PCB power board and the PCB control board are connected via a first flexible circuit board located on their outer sides, and the PCB control board and the PCB filter board are connected via a second flexible circuit board located on their outer sides. The flexible circuit board contains wires for power supply and signal transmission.

[0010] By adopting the above technical solution, three PCB boards are connected by a flexible circuit board, reducing the use of connectors, which not only saves space but also has the advantage of easy installation.

[0011] A further feature of this invention is that the first flexible plate and the second flexible plate are located on opposite sides of the aluminum support plate.

[0012] By adopting the above technical solution, the first and second flexible boards are arranged in a staggered manner, which not only facilitates the installation of the two flexible boards, but also avoids the safety hazards caused by the two flexible boards being piled up in the same small space.

[0013] The present invention is further configured as follows: two ECUs are symmetrically arranged on the left and right sides of the PCB control board; the two power connectors, two sensor connectors, and two signal connectors of the PCB filter board are all arranged symmetrically on the left and right sides; the power connectors, sensor connectors, and signal connectors on the left and right sides of the PCB filter board are respectively connected to the ECUs on the left and right sides of the PCB control board through independent lines on the left and right sides of the second flexible circuit board; the ECUs on the left and right sides of the PCB control board are respectively connected to the independent power management systems on the left and right sides of the PCB power board through independent lines on the left and right sides of the first flexible circuit board; and the two independent power management systems of the PCB power board are respectively connected to the multiple power input terminals of the redundant motor.

[0014] By adopting the above technical solution, the specific arrangement and connection methods of the redundant designs on the three PCB boards were defined.

[0015] A further feature of this invention is that the housing of the redundant motor is detachably provided with a plastic back cover for covering the PCB power board, column, aluminum support plate, first flexible board, second flexible board, PCB control board, PCB filter board, power connector, sensor connector, signal connector and power copper busbar. The plastic back cover is provided with a plug-in cylinder for the plug-in parts of the power connector, sensor connector and signal connector.

[0016] A further feature of this invention is that a waterproof and breathable valve is provided on the plastic back cover.

[0017] By adopting the above technical solution, a plastic back cover for covering various key components is detachably installed on the housing of the redundant motor, and a waterproof and breathable valve is provided on the plastic back cover. This achieves waterproof and dustproof protection, and also facilitates the timely discharge of high temperature inside the plastic back cover, which can effectively extend the service life of various components inside the plastic back cover.

[0018] A further feature of this invention is that the redundant motor is a six-phase dual-redundant motor.

[0019] By adopting the above technical solution, the redundancy of motors was limited.

[0020] A further feature of this invention is that when the fully redundant PPK assembly of the steer-by-wire system is applied to a hand-feel simulator, the two signal connectors need to be configured as four-way signal communication.

[0021] A further feature of this invention is that when the fully redundant PPK assembly of the steer-by-wire system is applied to the steering actuator, the two signal connectors need to be configured as two-way signal communication.

[0022] By adopting the above technical solution, the number of signal transmission lines of the signal connector is specifically limited when the present invention is applied to different scenarios.

[0023] The main beneficial effects of this utility model are:

[0024] 1. The PPK assembly of this utility model adopts a fully redundant design and the redundant components are reasonably arranged, which has the advantages of high safety, easy installation and strong practicality.

[0025] 2. The PPK assembly of this utility model adopts multiple columns evenly distributed in a ring to fix the aluminum support plate, which effectively ensures the structural stability of the aluminum support plate and the components attached to the aluminum support plate.

[0026] 3. The PPK assembly of this utility model uses a flexible board to connect three PCB boards, which reduces the use of connectors, saves space, and has the advantage of convenient installation.

[0027] 4. The PPK assembly of this utility model arranges the first flexible board and the second flexible board separately, which not only facilitates the installation of the two flexible boards, but also avoids the safety hazards caused by the two flexible boards being piled up in the same small space.

[0028] 5. The PPK assembly of this utility model has a plastic back cover that is detachably installed on the housing of the redundant motor to cover various key components. A waterproof and breathable valve is provided on the plastic back cover, which not only achieves waterproof and dustproof protection, but also facilitates the timely discharge of high temperature inside the plastic back cover, which can effectively extend the service life of various components inside the plastic back cover. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0031] Figure 2 This is a first-view structural diagram of the interior of this utility model;

[0032] Figure 3 This is a structural schematic diagram of the internal second-view aspect of this utility model;

[0033] Figure 4 This is a schematic diagram of the steer-by-wire system used in this utility model.

[0034] In the diagram, 1. Redundant motor; 11. Plastic back cover; 111. Plug-in cylinder; 12. Waterproof and breathable valve; 2. PCB power board; 3. PCB control board; 4. PCB filter board; 5.1. First flexible board; 5.2. Second flexible board; 6. Aluminum support plate; 7.1. First power connector; 7.2. Second power connector; 8.1. First sensor connector; 8.2. Second sensor connector; 9.1. First signal connector; 9.2. Second signal connector; 10.1. First power copper busbar; 10.2. Second power copper busbar. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0036] Example 1:

[0037] like Figures 1 to 4As shown, a fully redundant PPK assembly for a steer-by-wire system includes a redundant motor 1, which is a six-phase dual-redundant motor. An aluminum support plate 6 is mounted on the end face of the redundant motor 1 facing away from the output end via four columns arranged in a ring. The aluminum support plate 6 is fixed to the columns with screws. A PCB power board 2 is fixed to the housing of the redundant motor 1 below the aluminum support plate 6 with screws. The PCB power board 2 is connected to multiple power input terminals of the redundant motor 1. A PCB filter board 4 and a PCB control board 3 are fixed to the upper and lower sides of the aluminum support plate 6 with screws, respectively. The PCB power board 2 is positioned in the middle of all the columns. The PCB power board 2 and the PCB control board 3 are connected via a first flexible circuit board 5.1 located on their outer sides, and the PCB control board 3 and the PCB filter board 4 are connected via a second flexible circuit board 5.2 located on their outer sides. The first flexible circuit board 5.1 and the second flexible circuit board 5.2 are located on opposite sides of the aluminum support plate 6. The PCB filter board 4 is equipped with two power connectors (first power connector 7.1 and second power connector 7.2), two sensor connectors (first sensor connector 8.1 and second sensor connector 8.2), and two signal connectors (first signal connector 9.1 and second signal connector 9.2). The power copper busbars (first power copper busbar 10.1 and second power copper busbar 10.2) are fixed to the outside of the aluminum support plate 6 by screws. The power copper busbars are connected to the PCB power board 2 and the PCB filter board 4. The PCB control board 3 has two ECUs arranged symmetrically on the left and right. The two power connectors, two sensor connectors, and two signal connectors of the PCB filter board 4 are also arranged symmetrically on the left and right. The power connectors, sensor connectors, and signal connectors on the left and right sides of the PCB filter board 4 are connected to the ECUs on the left and right sides of the PCB control board 3 through independent lines on the left and right sides of the second flexible board 5.2. The ECUs on the left and right sides of the PCB control board 3 are connected to the independent power management systems on the left and right sides of the PCB power board 2 through independent lines on the left and right sides of the first flexible board 5.1. The two independent power management systems of the PCB power board 2 are connected to the multiple power input terminals of the redundant motor 1.

[0038] The housing of the redundant motor 1 is detachably provided with a plastic back cover 11 for covering the PCB power board 2, the column, the aluminum support plate 6, the first flexible board 5.1, the second flexible board 5.2, the PCB control board 3, the PCB filter board 4, the power connector, the sensor connector, the signal connector and the power copper busbar. The plastic back cover 11 is provided with a plug-in cylinder 111 for the power connector, the sensor connector and the signal connector, and a waterproof and breathable valve 12 is provided on the plastic back cover 11.

[0039] When the fully redundant PPK assembly of the steer-by-wire system is applied to the feel simulator (at this time, the PPK assembly is equivalent to...) Figure 4The "motor + ECU" within the steering feel simulation module requires two signal connectors (first signal connector 9.1 and second signal connector 9.2) to be configured for four-way signal communication. When the fully redundant PPK assembly of the steer-by-wire system is applied to the steering actuator (at this time, the PPK assembly is equivalent to...) Figure 4 The two signal connectors (first signal connector 9.1 and second signal connector 9.2) in the steering actuator module ("motor + ECU") need to be configured as two-way signal communication.

[0040] Operating principle (combined with) Figures 1 to 4 ):

[0041] 1. The vehicle power supply supplies power to the PPK assembly in the steering actuation module within the hand feel simulation module via the power connector. Within the PPK assembly, the power connected via the power connector is rectified by the PCB filter board 4 and then supplies power to the PCB control board 3 and the PCB power board 2 respectively.

[0042] 2. The torque and angle sensors independently transmit the collected torque and angle signals to the ECU of the PPK assembly through two sensor connectors (first sensor connector 8.1 and second sensor connector 8.2).

[0043] 3. The vehicle signals are transmitted independently to the two ECUs of the PPK assembly in the hand feel simulation module through the first signal connector 9.1 and the second signal connector 9.2. The two ECUs of the PPK assembly in the hand feel simulation module and the two ECUs of the PPK assembly in the steering execution module transmit signals through independent signal lines.

[0044] When the driver turns the steering wheel, the torque and angle sensor in the hand feel simulation module transmits the collected torque and angle signals to the ECU of the PPK assembly in the hand feel simulation module. The ECU of the PPK assembly in the hand feel simulation module sends an assist command to the steering execution module through a signal line. After receiving the signal, the ECU of the PPK assembly in the steering execution module controls the actuator motor to provide assistance. At the same time, the angle sensor in the steering execution module transmits the position information of the steering rack to the ECU of the PPK assembly in the steering execution module to identify whether the steering is in place.

Claims

1. A fully redundant PPK assembly for a steer-by-wire system, characterized by: The application relates to a redundant motor (1), the housing of the redundant motor (1) is provided with an aluminum support plate (6) through a stand column away from the end face of an output end, a PCB power plate (2) is arranged on the housing of the redundant motor (1) below the aluminum support plate (6), the PCB power plate (2) is connected with a plurality of power input terminals of the redundant motor (1) respectively, a PCB control plate (3) and a PCB filter plate (4) are arranged on the upper and lower sides of the aluminum support plate (6) respectively, the PCB power plate (2), the PCB control plate (3) and the PCB filter plate (4) are sequentially connected, two power connectors, two sensor connectors and two signal connectors are arranged on the PCB filter plate (4), a power copper bar is arranged outside the aluminum support plate (6), and the power copper bar is connected with the PCB power plate (2) and the PCB filter plate (4).

2. A fully redundant PPK assembly for a steer-by-wire system according to claim 1, characterized in that: The aluminum support plate (6) is fixed on the housing of the redundant motor (1) and is arranged in the form of three or more than three stand columns which are evenly distributed on the housing of the redundant motor (1) in the form of a ring.

3. A fully redundant PPK assembly for a steer-by-wire system according to claim 2, characterized in that: The PCB power plate (2) is arranged in the middle of all the stand columns, the PCB power plate (2) is connected with the PCB control plate (3) through a first soft plate (5.1) arranged outside the two plates, and the PCB control plate (3) is connected with the PCB filter plate (4) through a second soft plate (5.2) arranged outside the two plates.

4. A fully redundant PPK assembly for a steer-by-wire system according to claim 3, characterized in that: The first soft plate (5.1) and the second soft plate (5.2) are arranged on the two opposite sides of the aluminum support plate (6) respectively.

5. A fully redundant PPK assembly for a steer-by-wire system according to claim 4, characterized in that: The PCB control plate (3) is provided with two ECUs which are arranged in a left-right symmetrical mode, the two power connectors, the two sensor connectors and the two signal connectors of the PCB filter plate (4) are arranged in a left-right symmetrical mode, the power connectors, the sensor connectors and the signal connectors on the left and right sides of the PCB filter plate (4) are connected with the ECUs on the left and right sides of the PCB control plate (3) through independent lines on the left and right sides of the second soft plate (5.2) respectively, the ECUs on the left and right sides of the PCB control plate (3) are connected with independent power management systems on the left and right sides of the PCB power plate (2) through independent lines on the left and right sides of the first soft plate (5.1) respectively, and the two independent power management systems of the PCB power plate (2) are connected with the plurality of power input terminals of the redundant motor (1) respectively.

6. A fully redundant PPK assembly for a steer-by-wire system according to claim 1 or 3, characterized in that: A plastic rear cover (11) is detachably arranged on the housing of the redundant motor (1) and is used for covering the PCB power plate (2), the stand column, the aluminum support plate (6), the first soft plate (5.1), the second soft plate (5.2), the PCB control plate (3), the PCB filter plate (4), the power connectors, the sensor connectors, the signal connectors and the power copper bar, and a plug-in barrel (111) for plug-in parts of the power connectors, the sensor connectors and the signal connectors is arranged on the plastic rear cover (11).

7. A fully redundant PPK assembly for a steer-by-wire system according to claim 6, characterized in that: A waterproof and air-permeable valve (12) is arranged on the plastic rear cover (11).

8. A fully redundant PPK assembly for a steer-by-wire system according to claim 1, characterized by: The redundant motor (1) is a six-phase double-redundant motor.

9. A fully redundant PPK assembly for a steer-by-wire system according to claim 1, wherein: When the drive-by-wire steering system full-redundancy PPK assembly is applied to a hand feeling simulator, the two signal connectors need to be made into four-way signal communication.

10. A fully redundant PPK assembly for a steer-by-wire system according to claim 1, characterized by: When the full-redundancy PPK assembly of the steer-by-wire system is applied to the steering actuator, two signal connectors need to be made into two-way signal communication.

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