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] The invention relates to a fully redundant PPK assembly of a wire-controlled steering system, belonging to the technical field of automobile wire-controlled steering systems. Background Art

[0002] With the development of steer-by-wire technology in automobile steering systems, it will be inevitable for automobile steering systems to shift from electric power steering systems to steer-by-wire technology, and steer-by-wire systems must be fully redundant in high-level autonomous driving. Currently, most steer-by-wire systems on the market are non-redundant or semi-redundant, and have the defect of insufficient safety. Summary of the invention

[0003] The purpose of the present invention is to address the above-mentioned technical defects of existing automobile wire-controlled steering systems and to provide a fully redundant PPK assembly for a wire-controlled steering system. The PPK assembly adopts a fully redundant design and reasonably arranges various redundant components. It has the advantages of high safety, easy installation, and strong practicality.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A fully redundant PPK assembly of a wire-controlled steering system is characterized in that it includes a redundant motor, an aluminum support plate is placed on the end face of the redundant motor housing facing away from the output end through a column, a PCB power board is arranged on the redundant motor housing below the aluminum support plate, the PCB power board is respectively connected to multiple power input terminals of the redundant motor, a PCB filter board and a PCB control board are respectively arranged on the upper and lower sides of the aluminum support plate, the PCB power board, the PCB control board and the PCB filter board are connected in sequence, two power connectors, two sensor connectors and two signal connectors are arranged on the PCB filter board, a power copper bus is arranged on the outer side of the aluminum support plate, and the power copper bus is connected to the PCB power board and the PCB filter board.

[0006] By adopting the above technical solution, a fully redundant PPK assembly of a wire-controlled steering system is provided. The PPK assembly adopts a fully redundant design and reasonably arranges various redundant components. It has the advantages of high safety, easy installation, and strong practicality.

[0007] The present invention is further configured as follows: the aluminum support plate is fixed on the housing of the redundant motor using more than three columns evenly distributed in a ring shape on the housing of the redundant motor.

[0008] By adopting the above technical solution, the aluminum support plate is fixed by using a plurality of columns evenly distributed in a ring shape, thereby effectively ensuring the structural stability of the aluminum support plate and the components attached to the aluminum support plate.

[0009] The present invention is further configured as follows: the PCB power board is placed in the middle of all the columns, the PCB power board is connected to the PCB control board through a first soft board located outside the two boards, and the PCB control board is connected to the PCB filter board through a second soft board located outside the two boards. The soft board is equipped with wires for power supply and signal transmission.

[0010] By adopting the above technical solution, three PCB boards are connected by a flexible board, which reduces the use of connectors, saves space and has the advantage of easy installation.

[0011] The present invention is further configured as follows: the first soft board and the second soft board are respectively located on two corresponding sides of the aluminum support plate.

[0012] By adopting the above technical solution, the first soft board and the second soft board are arranged staggered, which not only facilitates the installation of the two soft boards, but also avoids the safety hazard caused by the two soft boards being piled up in the same narrow 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; two power connectors, two sensor connectors and two signal connectors of the PCB filter board are 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 circuits on the left and right sides of the second soft board; the ECUs on the left and right sides of the PCB control board are respectively connected to independent power management systems on the left and right sides of the PCB power board through independent circuits on the left and right sides of the first soft board; and the two independent power management systems of the PCB power board are respectively connected to multiple power input terminals of the redundant motor.

[0014] By adopting the above technical solution, the specific arrangement and connection method of each redundant design on the three PCB boards are limited.

[0015] The present invention is further configured as follows: a plastic back cover for covering a PCB power board, a column, an aluminum support plate, a first soft board, a second soft board, a PCB control board, a PCB filter board, a power connector, a sensor connector, a signal connector and a power copper busbar is detachably provided on the housing of the redundant motor; and a plug-in cylinder for the plug-in parts of the power connector, the sensor connector and the signal connector is provided on the plastic back cover.

[0016] The present invention is further configured as follows: 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 breathable valve is provided on the plastic back cover, which not only realizes waterproof and dustproof, but also facilitates the timely discharge of high temperature in the plastic back cover, and can effectively extend the service life of various components in the plastic back cover.

[0018] The present invention is further configured as follows: the redundant motor is a six-phase dual redundant motor.

[0019] By adopting the above technical solution, the redundant motor is limited.

[0020] The present invention is further configured as follows: when the fully redundant PPK assembly of the wire-controlled steering system is applied to the hand feel simulator, the two signal connectors need to be configured as four-way signal communications.

[0021] The present invention is further configured as follows: when the fully redundant PPK assembly of the wire-controlled steering system is applied to the steering actuator, the two signal connectors need to be configured to communicate two signals.

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

[0023] The main beneficial effects of the present invention are:

[0024] 1. The PPK assembly of the present invention adopts a fully redundant design and arranges the various redundant components reasonably, which has the advantages of high safety, easy installation, strong practicality, etc.

[0025] 2. The PPK assembly of the present invention uses a plurality of columns evenly distributed in a ring shape 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 the present invention uses a soft board to connect three PCB boards, which reduces the use of connectors, not only saves space, but also has the advantage of easy installation.

[0027] 4. The PPK assembly of the present invention arranges the first soft board and the second soft board in a staggered manner, which not only facilitates the installation of the two soft boards, but also avoids the safety hazard caused by the two soft boards being piled up in the same narrow space.

[0028] 5. The PPK assembly of the present invention has a plastic back cover for covering various key components detachably mounted on the housing of the redundant motor, and a waterproof breathable valve is provided on the plastic back cover, which not only realizes waterproof and dustproof properties, but also facilitates timely discharge of high temperature in the plastic back cover, and can effectively extend the service life of various components in the plastic back cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the structure of the appearance of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the first perspective of the interior of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the second viewing angle inside the present invention;

[0033] Figure 4 It is a schematic diagram of the wire control steering system applied by the present invention.

[0034] In the figure, 1. redundant motor; 11. plastic back cover; 111. plug-in cylinder; 12. waterproof breathable valve; 2. PCB power board; 3. PCB control board; 4. PCB filter board; 5.1. first soft board; 5.2. second soft 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 bus; 10.2. second power copper bus. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] like Figures 1 to 4As shown, a fully redundant PPK assembly of a wire-controlled steering system includes a redundant motor 1 which is a six-phase dual redundant motor. An aluminum support plate 6 is placed on the end face of the housing of the redundant motor 1 away from the output end through four pillars arranged in a ring. The aluminum support plate 6 is fixed to the pillar by screws. A PCB power board 2 is fixed to the housing of the redundant motor 1 below the aluminum support plate 6 by screws. The PCB power board 2 is respectively connected to multiple power input terminals of the redundant motor 1. A PCB filter board 4 and a PCB control board 3 are respectively fixed to the upper and lower sides of the aluminum support plate 6 by screws. The PCB power board 2 is placed in the middle of all the pillars. The PCB power board 2 and the PCB control board 3 are connected by a first soft board 5.1 located on the outside of the two, and the PCB control board 3 and the PCB filter board 4 are connected by a second soft board 5.2 located on the outside of the two. The first soft board 5.1 is connected and the second soft board 5.2 is respectively located on the corresponding two sides of the aluminum support plate 6. 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) are arranged on the PCB filter board 4. The power copper busbar (first power copper busbar 10.1 and second power copper busbar 10.2) is fixed to the outside of the aluminum support plate 6 by screws. The power copper busbar is connected to the PCB power board 2 and the PCB filter board 4. The PCB control board 3 is symmetrically provided with two ECUs. The two power connectors, two sensor connectors and two signal connectors of the PCB filter board 4 are arranged symmetrically. The power connector, sensor connector and signal connector on the left and right sides of the PCB filter board 4 are respectively 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 soft board 5.2. The ECUs on the left and right sides of the PCB control board 3 are respectively 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 soft board 5.1. The two independent power management systems of the PCB power board 2 are respectively connected to multiple power input terminals of the redundant motor 1.

[0038] The shell 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 soft board 5.1, the second soft 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 the plastic back cover 11 is provided with a waterproof breathable valve 12.

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

[0040] Principle of use (combined with Figures 1 to 4 ):

[0041] 1. The vehicle power supply supplies power to the PPK assembly in the hand feeling simulation module and the PPK assembly in the steering execution module through the power connector. In the PPK assembly, the power connected through 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 angle sensor transmits the collected torque and angle signals independently to the ECU of the PPK assembly through two sensor connectors (the first sensor connector 8.1 and the second sensor connector 8.2).

[0043] 3. The vehicle signal is independently transmitted to the two ECUs of the PPK assembly in the hand feeling 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 feeling 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 angle sensor in the feel simulation module transmits the collected torque and angle signals to the ECU of the PPK assembly in the feel simulation module. The ECU of the PPK assembly in the feel simulation module sends a power assist command to the steering execution module through the signal line. After receiving the signal, the ECU of the PPK assembly in the steering execution module controls the execution motor to assist. 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 in that: The invention comprises a redundant motor (1), wherein an aluminum support plate (6) is arranged on the end face of the housing of the redundant motor (1) away from the output end through a column, a PCB power board (2) is arranged on the housing of the redundant motor (1) below the aluminum support plate (6), and the PCB power board (2) is respectively connected to a plurality of power input terminals of the redundant motor (1), and a PCB filter board (4) and a PCB control board (3) are respectively arranged on the upper and lower sides of the aluminum support plate (6), and the PCB power board (2), the PCB control board (3) and the PCB filter board (4) are connected in sequence, and two power connectors, two sensor connectors and two signal connectors are arranged on the PCB filter board (4), and a power copper bus is arranged on the outer side of the aluminum support plate (6), and the power copper bus is connected to the PCB power board (2) and the PCB filter board (4).

2. A fully redundant PPK assembly of a steer-by-wire system according to claim 1, characterized in that: The aluminum support plate (6) is fixed on the outer shell of the redundant motor (1) using three or more columns evenly distributed in a ring shape on the outer shell of the redundant motor (1).

3. A fully redundant PPK assembly of a steer-by-wire system according to claim 2, characterized in that: The PCB power board (2) is arranged in the middle of all the columns; the PCB power board (2) and the PCB control board (3) are connected via a first soft board (5.1) located outside the two boards; and the PCB control board (3) and the PCB filter board (4) are connected via a second soft board (5.2) located outside the two boards.

4. A fully redundant PPK assembly of 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 respectively located on two corresponding sides of the aluminum support plate (6).

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

6. A fully redundant PPK assembly of a steer-by-wire system according to claim 1 or 3, characterized in that: The housing of the redundant motor (1) is detachably provided with a plastic back cover (11) for covering a PCB power board (2), a column, an aluminum support plate (6), a first soft board (5.1), a second soft board (5.2), a PCB control board (3), a PCB filter board (4), a power connector, a sensor connector, a signal connector and a power copper busbar; the plastic back cover (11) is provided with a plug-in cylinder (111) for the plug-in parts of the power connector, the sensor connector and the signal connector.

7. A fully redundant PPK assembly for a steer-by-wire system according to claim 6, characterized in that: The plastic rear cover (11) is provided with a waterproof and breathable valve (12).

8. The fully redundant PPK assembly of a steer-by-wire system according to claim 1, characterized in that: The redundant motor (1) is a six-phase dual redundant motor.

9. The fully redundant PPK assembly of a steer-by-wire system according to claim 1, characterized in that: When the fully redundant PPK assembly of the wire-controlled steering system is applied to a hand feel simulator, the two signal connectors need to be configured to provide four-way signal communication.

10. The fully redundant PPK assembly of a steer-by-wire system according to claim 1, characterized in that: When the fully redundant PPK assembly of the wire-controlled steering system is applied to a steering actuator, the two signal connectors need to be configured for two-way signal communication.

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