Electric power steering (EPS) electric control power assisting device

Abstract

The utility model discloses an EPS (electric power steering) electric control power assisting device, which solves the problems of poorer connection strength, poorer installation precision and more difficult installation among parts in the device in the prior art, and comprises a motor, a control circuit board connected with the motor, a controller cover cap and a connector connected with the control circuit board, the control circuit board comprises a power board and a main control board which are electrically connected through a flexible circuit board, positioning assemblies are arranged on the motor, the control circuit board, the connector and the controller cover, and each positioning assembly comprises a positioning column and a positioning hole. According to the utility model, the connection strength and the installation precision of all parts in the device are improved, and the installation is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of electric power steering technology, specifically providing an EPS electronically controlled power steering device. Background Technology

[0002] The power steering system is installed on the car chassis, exposed to the air, and located near the engine. When the car is in use, dust and water in the air will directly affect the operation of the power steering system. In severe weather, it may directly cause the power steering system to malfunction and reduce its service life. Therefore, the connection accuracy, strength and sealing performance between the various components of the power steering system are crucial.

[0003] The connection accuracy and strength of the components in current EPS electric power assist devices are relatively low. For example, a Chinese patent document, "An EPS Electric Control Unit Compatible with Full Redundancy and Partial Redundancy," publication number CN117601955A, discloses that the three-phase lines of the motor are directly connected to the control circuit board without a positioning structure. The connectors and controller covers in the device also lack positioning structures, resulting in poor installation accuracy and inability to guarantee connection strength. It also discloses that the power board is fixedly connected to the first screw post by the first screw, and the control board is fixedly connected to the second screw post by the second screw, but no positioning structure is provided, making it difficult to install the control circuit board and resulting in low production efficiency of the device. Utility Model Content

[0004] To address the problems of poor connection strength, low installation accuracy, and difficult installation in existing EPS electric power assist devices, this utility model provides an EPS electric power assist device that connects the motor's three-phase wires and the control circuit board via a phase connector, resulting in a more reliable connection and improved connection strength. Each component is equipped with a positioning component for easy installation, which improves installation accuracy and makes installation more convenient.

[0005] The specific solution of this utility model is as follows.

[0006] An EPS (Electric Power Assist) device includes a motor and a control circuit board connected to the motor, a controller cover and a connector connected to the control circuit board. The control circuit board includes a power board and a main control board electrically connected via a flexible circuit board. Positioning components are provided on the motor, the control circuit board, the connector and the controller cover. The positioning components include positioning posts and positioning holes.

[0007] In this invention, each component of the device is equipped with a positioning component, which enables precise positioning of each component, improves the installation accuracy of each component, and avoids poor connection strength or damage between components due to poor positioning accuracy during installation.

[0008] Preferably, the motor is provided with four power board positioning posts, and the power board is provided with three groove-shaped power board positioning holes. The power board positioning posts and the power board positioning holes cooperate to realize the positioning of the power board.

[0009] The four power board positioning posts are symmetrically arranged on the upper end face of the motor. The three power board positioning holes cooperate with three of the four power board positioning posts. Three power board positioning posts are stuck in the groove-shaped power board positioning holes, and the other power board positioning post is stuck at the edge of the power board, so as to achieve precise positioning of the power board. The positioning operation of this positioning component is convenient and quick, which improves the production efficiency of the device to a certain extent.

[0010] Preferably, the motor is also provided with a control circuit board mounting hole, and the control circuit board is provided with screw mounting holes that are adapted to the control circuit board mounting hole. There are five control circuit board mounting holes and five screw mounting holes. The screw passes through the screw mounting hole and is embedded in the control circuit board mounting hole to connect the motor and the control circuit board.

[0011] Preferably, the main control board has three screw mounting holes, and the corresponding control circuit board mounting holes are located on the power board positioning post. The power board has two screw mounting holes.

[0012] Preferably, the motor is also provided with two main control board positioning posts, and the main control board is provided with two main control board positioning holes, which are respectively hole-shaped and groove-shaped. The main control board positioning posts cooperate with the main control board positioning holes to realize the positioning of the main control board.

[0013] During the installation of the control circuit board, the power board is fixed on the motor, and the main control board is rotated above the power board and positioned by the main control board positioning post and the main control board positioning hole. The main control board positioning hole is set as a hole shape and an elongated groove shape, which makes the positioning process more convenient and faster while achieving precise positioning.

[0014] Preferably, the main control board positioning post is provided with two controller cover positioning posts, and the controller cover is provided with two controller cover positioning holes. The controller cover positioning posts and controller cover positioning holes cooperate to realize the positioning of the controller cover.

[0015] By setting the positioning post of the controller cover on the positioning post of the main control board, the controller cover can be accurately positioned without the need for additional positioning parts, saving space occupied by the positioning component, reducing costs, and making installation more convenient. The accurate positioning of the controller cover also avoids connector misalignment during the press-fitting process, which could lead to connector damage.

[0016] Preferably, the connector includes a power connector and two sets of signal connectors. The signal connector includes pins with fisheye terminals. One end of the signal connector is embedded in the controller cover, and the other end is inserted into the main control board and connected to the main control board through the fisheye terminals. The power connector includes a copper plate. One end of the power connector is embedded in the controller cover, and the other end is soldered to the power board through the copper plate.

[0017] The signal connector is designed with fisheye terminals for connection and conduction with the main control board, saving manufacturing costs. The copper plate of the power connector is used for power input conduction, and the shape of the main control board is designed not to obstruct the positioning and installation of the power connector.

[0018] Preferably, the signal connector and the power connector are respectively provided with signal connector positioning posts and power connector positioning posts, the power board is provided with power connector positioning holes, and the main control board is provided with signal connector positioning holes; the signal connector is provided with a first sealing adhesive groove at the contact point with the controller cover, the power connector is provided with a second sealing adhesive groove at the contact point with the controller cover, and the controller cover is provided with a third sealing adhesive groove at the contact point with the connector.

[0019] The signal connector positioning post is used for positioning the fisheye terminal when it is inserted into the main control board, ensuring that the fisheye terminal is accurately inserted and connected to the main control board, and avoiding damage to the signal connector during installation. The power connector positioning post is used for positioning the copper plate and the power board during soldering, ensuring the positional accuracy of the power connector and avoiding damage to the power connector during subsequent installation. The above-mentioned sealant grooves are all set in the sealing parts of the controller cover and the connector, for applying sealant to the device, which can meet the waterproof requirements and prevent excessive glue overflow from affecting the operation of other electronic components.

[0020] Preferably, the connector further includes two sets of phase connectors. The motor and the control circuit board are electrically connected through the phase connectors. The upper end of the motor is symmetrically provided with dual motor three-phase lines. The phase connector includes copper busbars, which are soldered to the motor three-phase lines and the power board respectively. The phase connector is provided with phase connector positioning posts, and the power board is provided with phase connector positioning holes that are adapted to the phase connector positioning posts. The phase connector achieves precise positioning through the cooperation of the phase connector positioning posts and phase connector positioning holes, thereby improving the connection strength between the motor three-phase lines and the power board.

[0021] Preferably, the controller cover has a vent valve mounting hole in the middle, and a vent valve is installed at the vent valve mounting hole; the upper end face of the motor has a heat-conducting adhesive groove, and the edge of the upper end face of the motor has a fourth sealing adhesive groove; a buckle is provided on the side wall of the motor, and a fastening part corresponding to the buckle is provided on the controller cover; the controller cover and the motor are fastened together by the buckle and the fastening part; and four pressing points are provided on the edge of the upper surface of the controller cover.

[0022] The controller cover is equipped with a vent valve to prevent component failure due to temperature and pressure imbalance between the inside and outside of the device; the thermally conductive adhesive groove is used for heat dissipation of the power board to prevent overheating and short circuits of the control circuit board; the fourth sealant groove is used for sealing the motor and the controller cover to ensure the protection requirements of the device; the press-fit point is used for the assembly of the controller cover, which connects the controller cover and the motor through snaps to prevent the controller cover from falling off and to ensure the assembly strength of the controller cover.

[0023] Therefore, this utility model has the following beneficial effects:

[0024] (1) The motor three-phase wires and the control circuit board are connected by a phase connector with a positioning component, which makes the connection more reliable and improves the connection strength and installation accuracy;

[0025] (2) Each component in the device is equipped with a positioning component, which improves the installation accuracy of each component;

[0026] (3) The positioning holes of the main control board are set as holes and grooves, and the positioning holes of the power board are set as grooves. While ensuring accurate positioning, the positioning process is simpler, the installation is more convenient, and the operation time is saved, which improves the production efficiency of the device to a certain extent.

[0027] (4) The controller cover positioning post is set on the main control board positioning post, and the control circuit board mounting hole is set on the power board positioning post. While ensuring accurate positioning, no additional parts are needed for positioning, saving the space occupied by the positioning components, reducing costs, and making installation more convenient.

[0028] (5) The sealing parts of the connector and controller cover and the sealing parts of the motor and controller cover are provided with sealant grooves to meet the waterproof requirements and prevent excessive glue overflow from affecting the operation of other electronic devices. 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is an exploded view of an EPS electronically controlled power assist device according to this utility model.

[0031] Figure 2 This is a schematic diagram of the structure of the motor of this utility model. Figure 1 .

[0032] Figure 3 This is a schematic diagram of the structure of the motor of this utility model. Figure 2 .

[0033] Figure 4 This is a schematic diagram of the positioning component on the motor of this utility model.

[0034] Figure 5 This is a schematic diagram of the control circuit board of this utility model.

[0035] Figure 6 This is a schematic diagram of the signal connector of this utility model.

[0036] Figure 7 This is a schematic diagram of the power connector of this utility model.

[0037] Figure 8 This is a schematic diagram of the phase connector of this utility model.

[0038] Figure 9 Top view of the controller cover of this utility model Figure 1 .

[0039] Figure 10 Top view of the controller cover of this utility model Figure 2 .

[0040] Figure 11 This is a bottom view of the controller cover of this utility model.

[0041] Figure 12 This is a partial structural diagram of an EPS electronically controlled power assist device according to the present invention. Figure 1 .

[0042] Figure 13 This is a partial structural diagram of an EPS electronically controlled power assist device according to the present invention. Figure 2 .

[0043] Figure 14 This is a schematic diagram of the bending path of the control circuit board of this utility model.

[0044] Figure 15 This is a partial structural diagram of an EPS electronically controlled power assist device according to the present invention. Figure 3 .

[0045] Figure 16This is a cross-sectional view of an EPS electronically controlled power assist device according to the present invention.

[0046] Figure 17 This is a front view of an EPS (Electric Power Assist) device according to the present invention.

[0047] Figure 18 This is an isometric view of an EPS electronically controlled power assist device according to the present invention.

[0048] In the diagram: 1. Motor; 101. Motor three-phase wire; 102. Power board positioning post; 103. Control circuit board mounting hole; 104. Main control board positioning post; 105. Controller cover positioning post; 106. Thermal conductive adhesive groove; 107. Fourth sealant groove; 108. Clip; 2. Control circuit board; 201. Power board; 2001. Screw mounting hole; 2011. Power board positioning hole; 2012. Power connector positioning hole; 2013. Phase connector positioning hole; 202. Main control board; 2021. Main control board positioning hole; 2022. Signal connector positioning hole; 203. Flexible circuit board. 3. Controller cover; 301. Vent valve mounting hole; 302. Vent valve; 303. Controller cover positioning hole; 304. Third sealant groove; 305. Fastening part; 306. Press fitting point; 4. Connector; 401. Signal connector; 4011. Pin; 4012. Fisheye terminal; 4013. Signal connector positioning post; 4014. First sealant groove; 402. Power connector; 4021. Copper plate; 4022. Power connector positioning post; 4023. Second sealant groove; 403. Phase connector; 4031. Copper busbar; 4032. Phase connector positioning post. Detailed Implementation

[0049] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0050] like Figure 1The diagram shown is an exploded view of an EPS (Electric Power Assist) device according to this invention. The EPS device consists of a motor 1, a control circuit board 2, a controller cover 3, and connectors 4. The control circuit board 2 includes a power board 201, a main control board 202, and a flexible circuit board 203. The power board 201 and the main control board 202 are electrically connected through the flexible circuit board 203. The connectors 4 include signal connectors 401, power connectors 402, and phase connectors 403. Two sets of signal connectors 401 are provided, one set of power connectors 402 is provided, and two sets of phase connectors 403 are provided. The two sets of signal connectors 401 are connected to the main control board 202, the power connectors 402 are connected to the power board 201, and the two sets of phase connectors 403 are connected to the power board 201. A vent valve 302 is provided on the controller cover 3.

[0051] like Figure 2 The diagram shown is a structural schematic of the motor of this utility model. Figure 1 The upper surface of motor 1 is provided with a thermally conductive adhesive groove 106 for heat dissipation of the power board 201, preventing overheating and short circuits of the control circuit board 2. It also has symmetrically arranged dual-path three-phase motor lines 101. The upper surface of motor 1 is also symmetrically provided with four power board positioning posts 102 for positioning the power board 201 during installation. Figure 3 The diagram shown is a structural schematic of the motor of this utility model. Figure 2 The motor 1 is also equipped with two main control board positioning posts 104 and five control circuit board mounting holes 103. Three of the control circuit board mounting holes 103 are located on three power board positioning posts 102 for mounting the main control board 202, and the other two control circuit board mounting holes 103 are located on the upper surface of the motor 1 for mounting the power board 201. The main control board positioning posts 104 are used to position the main control board 202 when it is installed. A fourth sealant groove 107 is provided at the edge of the upper end face of the motor 1 for sealing the motor 1 and the controller cover 3 to ensure the protection requirements of the device. A buckle 108 is provided on the side wall of the motor 1 for connecting with the controller cover 3.

[0052] like Figure 4 The diagram shows a schematic of the positioning assembly on the motor according to this invention. The positioning assembly includes a power board positioning post 102, a main control board positioning post 104, and a controller cover positioning post 105. The power board positioning post 102 has mounting holes 103 for the control circuit board of the main control board 202. The main control board positioning post 104 has two controller cover positioning posts 105, used for positioning the controller cover 3. By placing the controller cover positioning posts 105 on the main control board positioning post 104, precise positioning of the controller cover 3 is achieved without adding separate positioning parts, saving space, reducing costs, and making installation more convenient.

[0053] like Figure 5 The diagram shows the structure of the control circuit board of this invention. The control circuit board 2 consists of a power supply board 201, a main control board 202, and a flexible circuit board 203. The flexible circuit board 203 connects the power supply board 201 and the main control board 202. The control circuit board 2 has five screw mounting holes 2001 that are adapted to the control circuit board mounting holes 103 on the motor. Three of the screw mounting holes 2001 are located on the main control board 202. Screws pass through the screw mounting holes 2001 on the main control board 202 and are embedded in the control circuit board mounting holes 103 on the positioning post 102 of the power supply board, thereby fixing the main control board 202. The other two screw mounting holes 2001 are located on the power supply board 201. Screws pass through the screw mounting holes 2001 on the power supply board 201 and are embedded in the control circuit board mounting holes 103 on the upper surface of the motor, thereby fixing the power supply board 201. The power board 201 has three recessed positioning holes 2011, which cooperate with the power board positioning posts 102 on the motor to position the power board 201. The main control board 202 has two main control board positioning holes 2021, which are hole-shaped and groove-shaped respectively, and cooperate with the main control board positioning posts 104 on the motor to position the main control board 202. The power board 201 also has power connector positioning holes 2012 and phase connector positioning holes 2013, which are used for positioning the power connector 402 and phase connector 403 when they are connected to the power board 201, respectively. The main control board 202 also has signal connector positioning holes 2022, which are used for positioning the signal connector 401 when it is connected to the main control board 202.

[0054] like Figure 6 The diagram shows the structure of the signal connector of this utility model. The signal connector 401 includes a pin 4011 with a fisheye terminal 4012. One end of the signal connector 401 is embedded in the controller cover 3, and the other end is inserted into the main control board 202 via the fisheye terminal 4012, making contact with the main control board 202. The design of the pin 401 with the fisheye terminal 4012 facilitates connection and conduction with the main control board 202, saving manufacturing costs. The signal connector 401 is provided with a signal connector positioning post 4013, which cooperates with the signal connector positioning hole 2022 on the main control board. The signal connector positioning post 4013 is used for positioning the fisheye terminal 4012 when it is inserted into the main control board 202, ensuring accurate insertion and connection of the fisheye terminal 4012 to the main control board 202, and avoiding damage to the signal connector 401 during installation. A first sealant groove 4014 is also provided at the contact point between the signal connector 401 and the controller cover 3.

[0055] like Figure 7The diagram shows the structure of the power connector of this utility model. The power connector 402 includes a copper plate 4021. One end of the power connector 402 is embedded in the controller cover 3, and the other end is soldered to the power board 201 via the copper plate 4021. The copper plate 4021 of the power connector is used for power input conduction, and the shape of the main control board 202 is designed not to obstruct the positioning and installation of the power connector 402. The power connector 402 is provided with a power connector positioning post 4022, which mates with the power connector positioning hole 2012 on the power board 201. The power connector positioning post 4022 is used for positioning when the copper plate 4021 is soldered to the power board 201, ensuring the positional accuracy of the power connector 402 and preventing damage to the power connector 402 during subsequent installation operations. A second sealant groove 4023 is also provided at the contact point between the power connector 402 and the controller cover 3.

[0056] like Figure 8 The diagram shows the structure of the phase connector of this utility model. The motor 1 and the control circuit board 2 are electrically connected through the phase connector 403. The phase connector 403 includes a copper busbar 4031, which is soldered to the motor three-phase lines 101 and the power board 201 respectively. The phase connector 403 is provided with a phase connector positioning post 4032, which cooperates with the phase connector positioning hole 2013 on the power board 201 to achieve precise positioning of the phase connector 403 and improve the connection strength between the motor three-phase lines 101 and the power board 201.

[0057] like Figure 9 The image shown is a top view of the controller cover of this utility model. Figure 1 The controller cover 3 has a vent valve mounting hole 301 in the middle, and a vent valve 302 is installed at the vent valve mounting hole 301 to prevent component failure due to temperature and pressure imbalance between the inside and outside of the device. A third sealant groove 304 is provided on the controller cover 3 at the contact point with the connector 4. The first sealant groove 4014, the second sealant groove 4023, and the third sealant groove 304 are all located at the sealing parts of the controller cover 3 and the connector 4 for applying sealant to the device. UV adhesive or other sealants can be used to meet waterproofing requirements while preventing excessive glue overflow from affecting the operation of other electronic components. Figure 10 The image shown is a top view of the controller cover of this utility model. Figure 2 The controller cover 3 has four press-fit points 306 on the edge of its upper surface for assembly.

[0058] like Figure 11The image shown is a bottom view of the controller cover of this utility model. The controller cover 3 has two controller cover positioning holes 303, which cooperate with the controller cover positioning pins 105 on the motor to achieve the positioning of the controller cover 3. Precise positioning of the controller cover 3 prevents misalignment of the signal connector 401 and power connector 402 during the press-fitting process, thus avoiding damage to the signal connector 401 and power connector 402. The controller cover 3 also has a fastening part 305 corresponding to the buckle 108 on the motor. The buckle 108 and the fastening part 305 fasten the controller cover 3 and the motor 1 together, preventing the controller cover 3 from falling off and ensuring the assembly strength of the controller cover 3.

[0059] like Figure 12 The diagram shown is a partial structural schematic of an EPS electronically controlled power assist device according to this utility model. Figure 1 The phase connector 403 and the power connector 402 are positioned on the power board 201 by the positioning component and are fixedly connected to the power board 201. The signal connector 401 is inserted into the main control board 202 by the positioning component and is connected to the main control board 202. The power board 201 and the main control board 202 are connected by the flexible circuit board 203, and the power board 201 or the main control board 202 can be rotated through the flexible circuit board 203.

[0060] like Figure 13 The diagram shown is a partial structural schematic of an EPS electronically controlled power assist device according to this utility model. Figure 2 The three power board positioning holes 2011 engage with three of the four power board positioning posts 102, with the latter three positioned at the grooved power board positioning holes 2011 and the former positioned at the edge of the power board 201, achieving precise positioning of the power board 201. This positioning assembly makes the positioning operation more convenient and faster, improving the production efficiency of the device to some extent. After positioning the power board 201, screws pass through the screw mounting holes 2001 on the power board 201 and are embedded in the control circuit board mounting holes 103 on the upper surface of the motor, thus installing and fixing the power board 201.

[0061] like Figure 14 The diagram shows the bending path of the control circuit board of this utility model. The main control board 202 of the control circuit board 2 is bent along a specific path using the flexible circuit board 203. The bending trajectory of the positioning hole 2021 of the main control board is shown below. Figure 14As shown. In a preferred embodiment, the vertical distance between the power board 201 and the main control board 202 is designed to be h. After physical verification and analysis, the rotation center coordinates of the bending should satisfy (0.5h < X < 0.8h, y = h / 2), and the flexible board length should satisfy h < flexible board length < 1.6h. Due to the space and cost requirements of actual products, the value of h can be appropriately selected in the range of 20mm to 35mm. Limited by the flexible board length, space, and cost requirements, the positioning of the main control board 202 is designed as one hole and one groove; the diameter D3 of the hole, the diameter D4 and length L2 of the groove, the diameters D1 and D2 of the positioning posts, and the heights h2 and h3 of the positioning posts should ensure that bending does not affect assembly.

[0062] like Figure 15 The diagram shown is a partial structural schematic of an EPS electronically controlled power assist device according to this utility model. Figure 3 During the installation of the control circuit board 2, the power supply board 201 is fixedly mounted on the motor 1. The main control board 202 rotates above the power supply board 201 and is positioned by engaging the main control board positioning post 104 and the main control board positioning hole 2021. The main control board positioning hole 2021 is designed as a hole and an elongated groove, which achieves precise positioning while making the positioning process more convenient and faster. After the main control board 202 is positioned, screws pass through the screw mounting holes 2001 on the main control board 202 and are embedded in the control circuit board mounting holes 103 on the power supply board positioning post 102, thus installing and fixing the main control board 202.

[0063] like Figure 16 The figure shown is a cross-sectional view of an EPS electric control assist device according to the present invention. The controller cover 3 is positioned by cooperating with the controller cover positioning post 105 on the motor through the controller cover positioning hole 303. The fourth sealing glue groove 107 at the edge of the motor is used to seal the motor 1 and the controller cover 3 to ensure the protection requirements of the device.

[0064] like Figure 17 The image shown is a front view of an EPS (Electric Power Assist) device according to this utility model. Figure 18 The figure shown is an isometric view of an EPS electric power assist device according to the present invention. After the controller cover 3 is positioned, the controller cover 3 is assembled through the pressing point 306. The controller cover 3 and the motor 1 are connected by the snap fastener 108 and the fastening part 305 to prevent the controller cover 3 from falling off and to ensure the assembly strength of the controller cover 3.

[0065] In this utility model, positioning components are provided on the motor 1, control circuit board 2, connector 4, and controller cover 3 of an EPS electric control assist device. This enables precise positioning of each component, improves the installation accuracy of each component, and avoids poor connection strength or damage to components due to poor positioning accuracy during installation.

[0066] This invention connects the three-phase lines 101 of the motor and the control circuit board 2 via a phase connector 403 with a positioning component, making the connection more reliable and improving the connection strength and installation accuracy. Each component in the device is equipped with a positioning component, improving the installation accuracy of each component. The positioning holes 2021 on the main control board are designed as both holes and grooves, while the positioning holes 2011 on the power board are designed as recesses. This ensures accurate positioning while simplifying the positioning process, making installation more convenient, saving operation time, and improving the production efficiency of the device to a certain extent. The positioning post 105 of the controller cover is located on the positioning post 104 of the main control board, and the mounting hole 103 of the control circuit board is located on the positioning post 102 of the power board. This ensures accurate positioning without requiring additional positioning parts, saving space occupied by the positioning components, reducing costs, and making installation more convenient. The sealing parts of the connector 4 and the controller cover 3, as well as the sealing parts of the motor 1 and the controller cover 3, are equipped with sealant grooves, meeting waterproof requirements while preventing excessive glue overflow from affecting the operation of other electronic components.

[0067] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An EPS (Electric Power Assist) device, comprising a motor and a control circuit board connected to the motor, characterized in that, It also includes a controller cover and a connector connected to a control circuit board, the control circuit board including a power board and a main control board electrically connected by a flexible circuit board, and positioning components are provided on the motor, the control circuit board, the connector and the controller cover, the positioning components including positioning posts and positioning holes; The main control board positioning holes are set in the shape of holes and grooves, and the power board positioning holes are set in the shape of grooves; the controller cover has a vent valve mounting hole in the middle, and a vent valve is installed at the vent valve mounting hole. The main control board positioning post is equipped with two controller cover positioning posts, and the controller cover is equipped with two controller cover positioning holes. The controller cover positioning posts and controller cover positioning holes are matched.

2. The EPS electronically controlled power assist device according to claim 1, characterized in that, The motor is equipped with four power board positioning posts, and the power board is equipped with three groove-shaped power board positioning holes. The power board positioning posts and power board positioning holes cooperate to achieve the positioning of the power board.

3. The EPS electronically controlled power assist device according to claim 2, characterized in that, The motor is also provided with a control circuit board mounting hole, and the control circuit board is provided with a screw mounting hole that is adapted to the control circuit board mounting hole. The screw passes through the screw mounting hole and is embedded in the control circuit board mounting hole to connect the motor and the control circuit board.

4. The EPS electronically controlled power assist device according to claim 3, characterized in that, The main control board has three screw mounting holes, and the corresponding control circuit board mounting holes are located on the power board positioning post. The power board has two screw mounting holes.

5. The EPS electronically controlled power assist device according to claim 1, characterized in that, The motor is also equipped with two main control board positioning posts, and the main control board is equipped with two main control board positioning holes, which are respectively hole-shaped and groove-shaped. The main control board positioning posts cooperate with the main control board positioning holes to achieve the positioning of the main control board.

6. The EPS electronically controlled power assist device according to claim 5, characterized in that, The main control board positioning post is provided with two controller cover positioning posts, and the controller cover is provided with two controller cover positioning holes. The controller cover positioning posts and controller cover positioning holes cooperate to realize the positioning of the controller cover.

7. The EPS electronically controlled power assist device according to claim 1, characterized in that, The connector includes a power connector and two sets of signal connectors. The signal connector includes pins with fisheye terminals. One end of the signal connector is embedded in the controller cover, and the other end is inserted into the main control board and connected to the main control board through the fisheye terminals. The power connector includes a copper plate. One end of the power connector is embedded in the controller cover, and the other end is soldered to the power board through the copper plate.

8. An EPS electronically controlled power assist device according to claim 7, characterized in that, The signal connector and the power connector are respectively provided with signal connector positioning posts and power connector positioning posts, the power board is provided with power connector positioning holes, and the main control board is provided with signal connector positioning holes; The signal connector has a first sealing adhesive groove at the contact point with the controller cover, the power connector has a second sealing adhesive groove at the contact point with the controller cover, and the controller cover has a third sealing adhesive groove at the contact point with the connector.

9. An EPS electronically controlled power assist device according to claim 1, characterized in that, The connector also includes two sets of phase connectors. The motor and the control circuit board are electrically connected through the phase connectors. The upper end of the motor is symmetrically provided with dual motor three-phase lines. The phase connector includes copper busbars, which are soldered to the motor three-phase lines and the power board respectively. The phase connector is provided with a phase connector positioning post, and the power board is provided with a phase connector positioning hole that is adapted to the phase connector positioning post.

10. An EPS electronically controlled power assist device according to any one of claims 1-9, characterized in that, The controller cover has a vent valve mounting hole in the middle, and a vent valve is installed at the vent valve mounting hole; the upper end face of the motor has a heat-conducting adhesive groove, and the edge of the upper end face of the motor has a fourth sealing adhesive groove. The motor sidewall is provided with a buckle, and the controller cover is provided with a fastening part corresponding to the buckle. The controller cover and the motor are fastened together by the buckle and the fastening part. Four pressing points are provided on the edge of the upper surface of the controller cover.

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