阅读说明：本技术 一种电动助力转向装置及车辆 (Electric power steering device and vehicle ) 是由 蔡斌 李敬阳 景立群 于 2021-10-27 设计创作，主要内容包括：本发明公开了一种电动助力转向装置,包括电机、控制器、壳体,所述控制器包括控制电路板组件、驱动电路板组件；该装置还包括：一个PCB板,该PCB板为柔性PCB板或半柔性PCB板；其中,所述PCB板折弯后层叠布置,所述PCB板包括上PCB板、中间PCB板及下PCB板；第一器件单元,安装在所述上PCB板上形成所述控制电路板组件；第二器件单元,安装在所述下PCB板上形成所述驱动电路板组件。本发明通过让控制电路板组件、驱动电路板组件层叠布置,能够有效降低电动助力装置的周向尺寸,且结构紧凑,方便整车安装。(The invention discloses an electric power steering device, which comprises a motor, a controller and a shell, wherein the controller comprises a control circuit board assembly and a driving circuit board assembly; the device also includes: the PCB board is a flexible PCB board or a semi-flexible PCB board; the PCB is arranged in a stacked mode after being bent, and comprises an upper PCB, a middle PCB and a lower PCB; a first device unit mounted on the upper PCB to form the control circuit board assembly; and the second device unit is arranged on the lower PCB to form the driving circuit board assembly. According to the invention, the control circuit board assembly and the driving circuit board assembly are arranged in a stacked manner, so that the circumferential size of the electric power assisting device can be effectively reduced, the structure is compact, and the whole vehicle is convenient to mount.)

1. An electric power steering device comprises a motor, a controller and a shell, and is characterized in that the controller comprises a control circuit board assembly and a driving circuit board assembly; the device also includes:

the PCB board is a flexible PCB board or a semi-flexible PCB board; the PCB is arranged in a stacked mode after being bent, and comprises an upper PCB, a middle PCB and a lower PCB;

a first device unit mounted on the upper PCB to form the control circuit board assembly;

a second device unit mounted on the lower PCB to form the driving circuit board assembly; alternatively, the first and second electrodes may be,

a first device unit mounted on the lower PCB to form the driving circuit board assembly;

and the second device unit is arranged on the upper PCB to form the control circuit board assembly.

2. The electric power steering apparatus according to claim 1, wherein the upper PCB is provided with a notch; the device also includes:

the connecting piece is used for being electrically connected with an external power supply, and one end of the connecting piece penetrates through the notch to be electrically connected with the driving circuit board assembly;

and the fixing piece is used for fixing the connecting piece and the driving circuit board assembly on the motor end cover.

3. The electric power steering apparatus according to claim 1, wherein the control circuit board assembly is located above the driving circuit board assembly, and the heat generating device on the bottom surface of the driving circuit board assembly is connected to the motor end cap through a heat dissipating material.

4. The electric power steering apparatus according to claim 1, wherein the motor is a 6K-phase motor, where K is a positive integer; the number of drive axles contained in the drive circuit board assembly is equal to the number of phases of the motor.

5. The electric power steering apparatus according to claim 1, wherein motor phase lead-out wires of the motor are arranged in a circumferential mirror image.

6. The electric power steering apparatus according to claim 1, wherein a magnet is mounted at a position of a center of a rotor of the motor near the driving circuit board assembly, and the driving circuit board assembly is provided with an angle decoding chip.

7. The electric power steering apparatus according to claim 1, wherein the control circuit board assembly is mounted on a protrusion of the motor.

8. The electric power steering apparatus of claim 1, wherein the first device unit includes, but is not limited to, a microprocessor, a power circuit, and a drive circuit for a first motor drive axle; the second device unit includes, but is not limited to, a second motor drive axle, a power device, and a motor rotor position sensor.

9. A vehicle comprising an electric power steering apparatus according to any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of EPS, in particular to an electric power steering device and a vehicle.

Background

The EPS system can provide steering power for a vehicle by means of a motor, the traditional EPS system mainly comprises the motor, a controller, a shell and the like, the EPS utilizes a sensor to collect running data of the vehicle, determines a target torque required by the vehicle at present, and controls the motor of the vehicle to provide output power of the required target torque for the vehicle.

The controller generally comprises a control circuit board assembly and a driving circuit board assembly. The driving circuit board assembly in the controller of the component with the highest failure rate in the electric power steering device is directly designed redundantly in the traditional scheme, so that the size of the electric power steering device is overlarge, and the arrangement of the whole vehicle is not facilitated.

In chinese patent application No.: CN201820969893.4 discloses an electric power steering control system, comprising: the double-winding power assisting device comprises a first signal acquisition module, a second signal acquisition module, a first control module, a second control module, a first driving circuit module, a second driving circuit module and a double-winding power assisting motor; the first signal acquisition module is connected with the first control module and used for inputting a first acquisition signal for the first control module; the first control module is connected with the first drive circuit module, and the second control module is connected with the second drive circuit module; the first control module is used for calculating power-assisted information according to the first acquisition signal and sending a first control signal to the first drive circuit module according to the power-assisted information; the two driving circuit modules are respectively connected with the double-winding power-assisted motor and are respectively used for two windings of the motor. The technical scheme carries out redundancy design, and causes the steering device to be overlarge in size. In view of this, the present application is proposed.

Disclosure of Invention

In order to solve at least one technical problem in the background art, the invention provides an electric power steering device and a vehicle.

The invention provides an electric power steering device, which comprises a motor, a controller and a shell, wherein the controller comprises a control circuit board assembly and a driving circuit board assembly; the device also includes:

the PCB board is a flexible PCB board or a semi-flexible PCB board; the PCB is arranged in a stacked mode after being bent, and comprises an upper PCB, a middle PCB and a lower PCB;

a first device unit mounted on the upper PCB to form the control circuit board assembly;

a second device unit mounted on the lower PCB to form the driving circuit board assembly; alternatively, the first and second electrodes may be,

a first device unit mounted on the lower PCB to form the driving circuit board assembly;

and the second device unit is arranged on the upper PCB to form the control circuit board assembly.

Preferably, the upper PCB board is provided with a notch; the device also includes:

the connecting piece is used for being electrically connected with an external power supply, and one end of the connecting piece penetrates through the notch to be electrically connected with the driving circuit board assembly;

and the fixing piece is used for fixing the connecting piece and the driving circuit board assembly on the motor end cover.

Preferably, the control circuit board assembly is located above the driving circuit board assembly, and the heating device on the bottom surface of the driving circuit board assembly is connected with the motor end cover through a heat dissipation material.

Preferably, the motor is a 6K phase motor, wherein K is a positive integer; the number of drive axles contained in the drive circuit board assembly is equal to the number of phases of the motor.

Preferably, the motor phase outgoing lines of the motor are distributed in a circumferential mirror image mode.

Preferably, a magnet is assembled at a position, close to the driving circuit board assembly, of the center of the rotor of the motor, and the driving circuit board assembly is correspondingly provided with an angle decoding chip.

Preferably, the control circuit board assembly is mounted on a protrusion of the motor.

Preferably, the first device unit includes, but is not limited to, a microprocessor, a power circuit, and a drive circuit of the first motor drive bridge; the second device unit includes, but is not limited to, a second motor drive axle, a power device, and a motor rotor position sensor.

The invention also discloses a vehicle comprising the electric power steering device.

The beneficial effects brought by one aspect of the invention are as follows:

according to the invention, the control circuit board assembly and the driving circuit board assembly are arranged in a stacked manner, so that the circumferential size of the electric power assisting device can be effectively reduced, the structure is compact, and the whole vehicle is convenient to mount.

Drawings

FIG. 1 is a schematic structural view of one aspect of the present disclosure;

FIG. 2 is a schematic structural diagram of a controller according to the present disclosure;

fig. 3 is a schematic structural view of the controller according to the present invention after folding the PCB.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in the present application may be combined with each other; the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Application overview:

in the prior art, a control circuit board assembly and a driving circuit board assembly are formed by utilizing two PCBs and installing corresponding devices, and the control circuit board assembly and the driving circuit board assembly are tiled and arranged in a plane. This results in a large circumferential dimension of the entire apparatus. Meanwhile, the control circuit board assembly and the driving circuit board assembly are electrically connected by welding. The high temperatures of such soldering have a small probability of causing damage to the semiconductor device; the welding spots are in poor welding risk; the welded joint stress may fail due to vibration. In view of this, the applicant proposes the following improvements:

referring to fig. 1, 2 and 3, the electric power steering apparatus provided by the present invention includes a motor 1, a controller 2 and a housing 3, wherein the controller 2 includes a control circuit board assembly 201 and a driving circuit board assembly 202; the device also includes:

a PCB P, which is a flexible PCB P or a semi-flexible PCB P; the PCB P is arranged in a stacked mode after being bent, and comprises an upper PCB 2011, a middle PCB and a lower PCB 2021;

a first device unit 2012 mounted on the upper PCB 2011 to form the control circuit board assembly 201;

and a second device unit 2022 mounted on the lower PCB 2021 to form the driving circuit board assembly 202.

The first device unit 2012 includes, but is not limited to, a microprocessor, a power circuit, and drive circuits for two motor drive bridges; the second device unit 2022 includes, but is not limited to, power devices and a rotor position sensor of the motor 1. The number and types of the first device unit 2012 and the second device unit 2022 and the installation and connection relationship with the PCB P may be implemented by the prior art. The drive circuits of the two motor drive axles are designed redundantly for driving the motor 1.

In the present application, a larger flexible PCB P or a semi-flexible PCB P is used, and a first device unit 2012 and a second device unit 2022 are mounted in corresponding regions on the PCB P to form a control circuit board assembly 201 and a driving circuit board assembly 202, respectively. And then bending the PCB P to enable the control circuit board assembly 201 and the driving circuit board assembly 202 to be arranged in a stacked mode. Thus effectively reducing the circumferential dimension of the whole device.

Because the control circuit board assembly 201 and the driving circuit board assembly 202 are made of one PCB P, the electric continuity is realized by using the internal circuit of the PCB P, and the electric connection of the control circuit board assembly 201 and the driving circuit board assembly 202 is realized without additional welding, thereby avoiding the problems of poor welding, device damage and the like caused by welding.

The embodiment has the advantages of low functional failure rate, compact structure and easy assembly.

As a further improvement to the above embodiment, in one embodiment, the upper PCB 2011 is provided with a notch; the device also includes:

a conductive connecting piece 4, the connecting piece 4 is used for electrically connecting with an external power supply, and one end of the connecting piece 4 passes through the notch to be electrically connected with the driving circuit board assembly 202; and a fixing part for fixing the connecting part and the driving circuit board assembly 202 on the end cover of the motor 1. The requirement of the whole vehicle on the insertion and extraction force of the wiring harness is met. The notch is arranged, the connecting piece is arranged on the inner side of the notch, and the circumferential size of the whole device is reduced.

As a further improvement of the above embodiment, in one embodiment, the control circuit board assembly 201 is located above the driving circuit board assembly 202, and the heat generating device on the bottom surface of the driving circuit board assembly 202 is connected to the end cover of the motor 1 through a heat dissipating material. The heat dissipation is convenient.

As a further improvement of the above example, in one embodiment, the motor 1 is a 6K phase motor 1, where K is a positive integer; the number of drive bridges included in the drive circuit board assembly 202 is equal to the number of phases of the motor 1. The three-phase outgoing line is commonly designed for a general brushless motor 1, and the 6 phase is a three-phase redundant design, so that safe use is ensured.

As a further improvement of the above embodiment, in one embodiment, the motor 1 phase lead-out wires of the motor 1 are distributed in a circumferential mirror image. Is convenient for production.

As a further improvement of the above embodiment, in one embodiment, the control circuit board assembly 201 is mounted on the protrusion 101 of the motor 1.

As a further improvement of the above embodiment, in one embodiment, a magnet is mounted at a position close to the driving circuit board assembly 202 in the center of the rotor of the motor 1, and the driving circuit board assembly 202 is correspondingly provided with an angle decoding chip.

In another embodiment, the difference from the above embodiment is:

a first device unit mounted on the lower PCB to form the driving circuit board assembly; and the second device unit is arranged on the upper PCB to form the control circuit board assembly. The drive circuit board assembly is arranged below, and the control circuit board assembly is arranged above. The circumferential dimension is reduced.

A vehicle comprises the electric power steering device. The electric power steering device has small circumferential size and is convenient for the whole vehicle to be installed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.