CN114312989A - Compact electric power-assisted steering power unit - Google Patents
Compact electric power-assisted steering power unit Download PDFInfo
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- CN114312989A CN114312989A CN202210083390.8A CN202210083390A CN114312989A CN 114312989 A CN114312989 A CN 114312989A CN 202210083390 A CN202210083390 A CN 202210083390A CN 114312989 A CN114312989 A CN 114312989A
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Abstract
The invention relates to the technical field of automobile electric power steering, in particular to a compact power unit for electric power steering. The utility model provides a power unit that electronic power assisted steering of compact, includes motor element, ECU subassembly, apron, its characterized in that: and an ECU component is connected to one side of the motor component, and the motor component and the ECU component are sealed through a cover plate. Compared with the prior art, the compact power unit for the electric power steering is provided, and the main purpose is to reduce the space size of a Powerpack (power unit) in an EPS (electric power steering system), simplify the design structure and improve the manufacturing manufacturability; meanwhile, the heat dissipation capacity of the power unit is improved, and the provided redundant space can also be used as a solution for the power unit of a high-power (large-size) steering system.
Description
Technical Field
The invention relates to the technical field of automobile electric power steering, in particular to a compact power unit for electric power steering.
Background
In the existing electric power steering device, two structures are usually adopted in the arrangement mode of a PCB of an ECU in a power unit; one is a single PCB board design mode, the PCB board size is bigger at this moment, the ECU whole radial space size is enlarged therewith, and the actual size is often limited by the whole vehicle installation space; another kind is multilayer PCB board and adopts upper and lower structural design mode, and the PCB board size receives motor diameter size restraint this moment, can only design very little, leads to often needing 3 and above PCB boards, and product cost is higher, and the inside electric connection mode of ECU is complicated, and whole manufacturing procedure is loaded down with trivial details.
Disclosure of Invention
The invention provides a compact power unit for Electric Power Steering (EPS), aiming at overcoming the defects of the prior art, reducing the space size of a Powerpack (power unit) in an EPS (electric power steering system), simplifying the design structure and improving the manufacturing manufacturability; meanwhile, the heat dissipation capacity of the power unit is improved, and the provided redundant space can also be used as a solution for the power unit of a high-power (large-size) steering system.
In order to achieve the purpose, the power unit of the compact electric power steering is designed, which comprises a motor component, an ECU component and a cover plate, and is characterized in that: and an ECU component is connected to one side of the motor component, and the motor component and the ECU component are sealed through a cover plate.
The ECU component is positioned at the top position of the motor component or at the side position of the motor component.
The top of the motor assembly is connected with the ECU assembly by adopting heat-conducting glue and bonding glue; the side of the motor assembly is connected with the cover plate through a sealant, a main PCB is arranged between the cover plate and the side of the motor assembly, the periphery of the main PCB is connected with the motor assembly through fixing screws, and a heat conduction grease is arranged between the main PCB and the motor assembly.
The ECU component comprises an ECU shell, an auxiliary PCB, an RPS chip, an external connector interface, a three-phase switching terminal, an interface Pin needle, a connector, a right-angle Pin needle, a main positioning column and an auxiliary positioning column, wherein a plurality of external connector interfaces are arranged on one side of the top of the ECU shell, a plurality of interface Pin needles are arranged in the external connector interfaces, the upper end of the connector is connected to the inner wall of the ECU shell below the external connector interfaces, the three-phase switching terminal is respectively arranged on the inner wall of the other side of the top of the ECU shell, the auxiliary PCB is connected to the lower side of the ECU shell by mounting screws, the lower end of the connector is connected with the upper end of the right-angle Pin needle, and the lower end of the right-angle Pin needle penetrates through the auxiliary PCB; the bottom of the auxiliary PCB is connected with the RPS chip.
The left side and the right side of the interior of the ECU shell are respectively provided with an auxiliary positioning column, and the left side and the right side of the side face of the ECU shell are respectively provided with a main positioning column.
The structure of the ECU shell is matched with the structure of the top of the motor assembly.
The cover plate and the main PCB are of rectangular panel structures, and a plurality of clamping grooves are formed in the outer edge of the cover plate.
The sealant is of a rectangular frame structure.
The side surface of the motor component is connected with another ECU component by adopting another heat conduction grease and another bonding glue; the top of the motor component is connected with another cover plate by adopting another sealant, another main PCB is arranged between the other cover plate and the top of the motor component, the periphery of the other main PCB is respectively connected with the motor component by adopting fixing screws, another heat-conducting adhesive is arranged between the other main PCB and the motor component, and the bottom of the other main PCB is connected with another RPS chip.
The other ECU component comprises another ECU shell, another auxiliary PCB board, another external connector interface, another three-phase switching terminal, another interface Pin needle, another connector, another right angle Pin needle, another main positioning column and another auxiliary positioning column, wherein one side of the top of the other ECU shell is provided with a plurality of another external connector interfaces, a plurality of another interface Pin needles are arranged in the other external connector interfaces, the upper end of the other connector is connected to the inner wall of the other ECU shell positioned below one side of the other external connector interface, another auxiliary PCB board is connected to the lower side of the other ECU shell by adopting mounting screws, the lower end of the other connector is connected with the upper end of the other right angle Pin needle, and the lower end of the other right angle Pin needle penetrates through the other auxiliary PCB board.
The left side and the right side of the inside of the other ECU shell are respectively provided with another pair of positioning columns, and the side surface of the other ECU shell is provided with the left side and the right side which are respectively provided with another main positioning column.
The structure of the other ECU shell is matched with the structure of the side surface of the motor component.
And one side of the other cover plate and one side of the other main PCB which are rectangular panels are provided with arc structures, and the outer edge of the other cover plate is provided with a plurality of clamping grooves.
The other adhesive is of a U-shaped frame structure.
The motor assembly comprises a motor shell, a heat conducting plate, a motor shaft, a rotor, a stator, a three-phase power supply Pin needle and a magnet assembly, wherein the heat conducting plate is connected to the top of the motor shell; the top of the motor shaft penetrates through the heat conducting plate and is connected with the magnet assembly by adopting a connecting piece; the heat conducting plate on one side of the magnet assembly is provided with a fan-shaped boss.
The side surface of the motor shell is provided with a plurality of rectangular bosses.
The heat conducting plate on the other side of the magnet assembly is provided with a waist-shaped groove.
Compared with the prior art, the invention provides a compact power unit for electric power steering, which mainly aims to reduce the space size of a Powerpack (power unit) in an EPS (electric power steering system), simplify the design structure and improve the manufacturing manufacturability; meanwhile, the heat dissipation capacity of the power unit is improved, and the provided redundant space can also be used as a solution for the power unit of a high-power (large-size) steering system.
Drawings
Fig. 1 is a block diagram of an electric power steering system to which an example of the present invention is applied.
Fig. 2 is a perspective view of a compact electric power steering power unit of embodiment 1 of the present invention.
Fig. 3 is an exploded view of the compact electric power steering power unit according to embodiment 1 of the present invention.
Fig. 4 is a sectional view 1 of the compact electric power steering power unit of embodiment 1 of the present invention.
Fig. 5 is a sectional view 2 of the compact electric power steering power unit of embodiment 1 of the present invention.
Fig. 6 is a perspective view of an ECU assembly according to embodiment 1 of the present invention.
Fig. 7 is a perspective view of an ECU housing according to embodiment 1 of the present invention.
Fig. 8 is a perspective view of the motor assembly according to embodiment 1 of the present invention.
Fig. 9 is an isometric view of a cover plate according to embodiment 1 of the present invention.
Fig. 10 is a perspective view of a compact electric power steering power unit of embodiment 2 of the present invention.
Fig. 11 is an exploded view of a compact electric power steering power unit according to embodiment 2 of the present invention.
Fig. 12 is a sectional view 1 of a compact electric power steering power unit of embodiment 2 of the present invention.
Fig. 13 is a sectional view 2 of the compact electric power steering power unit of embodiment 2 of the present invention.
Fig. 14 is a perspective view of an ECU assembly according to embodiment 2 of the present invention.
Fig. 15 is a perspective view of an ECU housing relating to embodiment 2 of the present invention.
Fig. 16 is an isometric view of a motor assembly according to embodiment 2 of the present invention.
Fig. 17 is an isometric view of a cover plate according to embodiment 2 of the present invention.
Detailed Description
The invention is further illustrated below with reference to the accompanying drawings.
As shown in fig. 2 to 17, an ECU assembly 72 is connected to one side of the motor assembly 71, and the motor assembly 71 and the ECU assembly 72 are sealed by a cover plate 73.
The ECU assembly 72 is located at a top position of the motor assembly 71 or at a side position of the motor assembly 71.
The top of the motor assembly 71 is connected with an ECU assembly 72a by adopting heat conducting glue 74 and bonding glue 75; the side of motor element 71 adopt sealed glue 76 to be connected with apron 73a, be located and be equipped with main PCB board 77 between apron 73a and the side of motor element 71, main PCB board 77 adopts set screw and is connected with motor element 71 respectively all around, main PCB board 77 and motor element 71 between be equipped with heat conduction fat 78.
The ECU component 72a comprises an ECU shell, an auxiliary PCB, an RPS chip, an external connector interface, a three-phase switching terminal, an interface Pin needle, a connector, a right-angle Pin needle, a main positioning column and an auxiliary positioning column, wherein a plurality of external connector interfaces 72a-4 are arranged on one side of the top of the ECU shell 72a-1, a plurality of interface Pin needles 72a-6 are arranged in the external connector interfaces 72a-4, the upper end of a connector 72a-7 is connected on the inner wall of the ECU shell 72a-1 positioned below the external connector interfaces 72a-4, three-phase switching terminals 72a-5 are respectively arranged on the inner wall of the other side of the top of the ECU shell 72a-1, the auxiliary PCB 72a-2 is connected below the ECU shell 72a-1 by adopting mounting screws, the lower end of the connector 72a-7 is connected with the upper end of the right-angle Pin needle 72a-8, the lower end of the right-angle Pin 72a-8 penetrates through the auxiliary PCB 72 a-2; the bottom of the secondary PCB 72a-2 is connected to the RPS chip 72 a-3.
The left and right sides of the interior of the ECU housing 72a-1 are provided with secondary posts 72a-10, respectively, and the side of the ECU housing 72a-1 is provided with left and right sides of the interior of the ECU housing 72a-1 are provided with primary posts 72a-9, respectively.
The structure of the ECU housing 72a-1 matches the structure of the top of the motor assembly 71.
The cover plate 73a and the main PCB 77 are rectangular panels, and a plurality of slots are formed on the outer edge of the cover plate 73 a.
The sealant 76 is a rectangular frame structure.
The side surface of the motor assembly 71 is connected with another ECU assembly 72b by adopting another heat conduction grease 79 and another bonding glue 710; the top of the motor component 71 is connected with another cover plate 73b by another sealant 711, another main PCB 712 is arranged between the other cover plate 73b and the top of the motor component 71, the periphery of the other main PCB 712 is respectively connected with the motor component 71 by fixing screws, another heat-conducting adhesive 713 is arranged between the other main PCB 712 and the motor component 71, and the bottom of the other main PCB 712 is connected with another RPS chip 714.
The other ECU assembly 72b comprises another ECU housing, another auxiliary PCB board, another external connector port, another three-phase relay terminal, another port Pin Pin, another connector, another right angle Pin Pin, another main locating post, another auxiliary locating post, a plurality of other external connector ports 72b-4 are arranged on one side of the top of the other ECU housing 72b-1, a plurality of other port Pin pins 72b-6 are arranged in the other external connector port 72b-4, the upper end of another connector 72b-7 is connected on the inner wall of the other ECU housing 72b-1 below one side of the other external connector port 72b-4, another auxiliary PCB board 72b-2 is connected below the other ECU housing 72b-1 by adopting mounting screws, the lower end of the other connector 72b-7 is connected with the upper end of another right angle Pin Pin 72b-8, the lower end of the other right angle Pin 72b-8 penetrates the other sub PCB board 72 b-2.
The other ECU housing 72b-1 has another pair of positioning posts 72b-10 on the left and right sides thereof, and the other ECU housing 72b-1 has another main positioning post 72b-9 on the left and right sides thereof.
The structure of the other ECU housing 72b-1 matches the structure of the side of the motor assembly 71.
The other cover plate 73b and the other main PCB 712 are rectangular panels, and have arc structures on one side, and a plurality of slots on the outer edge of the other cover plate 73 b.
The other adhesive 710 is a U-shaped frame structure.
The motor assembly 71 comprises a motor shell, a heat conduction plate, a motor shaft, a rotor, a stator, a three-phase power supply Pin needle and a magnet assembly, wherein the heat conduction plate 71-4 is connected to the top of the motor shell 71-1, the motor shaft 71-2 is arranged inside the motor shell 71-1, the rotor 71-5 is sleeved in the middle of the motor shaft 71-2, the stator 71-6 is sleeved outside the rotor 71-5, and the three-phase power supply Pin needle 71-7 is arranged at the upper end of the stator 71-6; the top of the motor shaft 71-2 penetrates through the heat conducting plate 71-4 and is connected with the magnet assembly 71-3 by adopting a connecting piece; the heat conducting plate 71-4 at one side of the magnet assembly 71-3 is provided with a fan-shaped boss 71-8.
A plurality of rectangular bosses 71-9 are arranged on the side surface of the motor shell 71-1.
The heat conducting plate 71-4 positioned at the other side of the magnet assembly 71-3 is provided with a kidney-shaped groove 71-10.
The invention provides two specific implementation cases, in embodiment 1, an ECU component is arranged at the top of a motor; in embodiment 2, the ECU is disposed at the side of the motor, and the external harness interfaces are oriented differently, and the specific implementation can be selected according to the installation direction and the spatial dimension constraint of the electric power steering system assembly in the entire vehicle.
The power-assisted steering principle is as follows: as shown in fig. 1, a steering wheel 1 is connected to a column 3, a torque angle sensor 4 is provided between an input shaft 2 and an output shaft 6 in the column 3, a power unit 7 is connected to a reduction mechanism 5, and the reduction mechanism 5 is connected to the output shaft 6. When the steering wheel 1 is rotated, the input shaft 2 forms an angle difference relative to the output shaft 6, the torque angle sensor 4 detects a torque angle and a steering wheel angle and transmits a signal to the ECU component in the power unit 7, the ECU component drives the motor according to the signal, and the torque of the motor is applied to the output shaft 6 through the speed reducing mechanism 5 to realize boosting. The output shaft 6 is connected with a mechanical steering gear 9 through an intermediate shaft 8, and the torque is converted into rack axial force to drive wheels to realize steering.
Embodiment 1:
as shown in fig. 2 to 9, the ECU assembly 72a includes an ECU housing 72a-1, a sub PCB 72a-2, a plurality of mounting screws, and a connector 72a-7, wherein the connector 72a-7 is embedded and injection molded in the ECU housing 72a-1, the connector 72a-7 is connected to a right angle Pin 72a-8, an external connector port 72a-4 is provided in the ECU housing 72a-1, the external connector port 72a-4 includes a plurality of Pin ports 72a-6, the ECU housing 72a-1 further includes a three-phase adapter terminal 72a-5 and a bushing. The auxiliary PCB 72a-2 is positioned by two auxiliary positioning columns 72a-10 and is fixedly arranged on the bush by mounting screws, and the transfer joint end of the right-angle Pin Pin 72a-8 is welded with the corresponding welding hole on the auxiliary PCB 72a-2 to form a welding area; the three-phase welding end of the three-phase adapter terminal 72a-5 is welded with the corresponding welding hole on the auxiliary PCB 72a-2 to form a welding area; the interface soldering end of the interface Pin 72a-6 of the external connector interface 72a-4 is soldered to the corresponding soldering hole on the sub PCB board 72a-2 to form a soldering area in order to realize electrical connection.
The U-shaped groove on the ECU shell 72a-1 is matched with a convex rib on the motor shell 71-1 through adhesive glue 75, so that the ECU component 72a is connected with the motor component 71, meanwhile, the auxiliary PCB 72a-2 is provided with a through hole which is in one-to-one correspondence with the three-phase opposite insertion end positions of the three-phase switching terminals 72a-5, the motor component 71 comprises a group of three-phase power supply Pin needles 71-7, and when the ECU component 72a and the motor component 71 are installed in an opposite matching mode, the three-phase power supply Pin needles 71-7 penetrate through the through hole to be matched with the three-phase opposite insertion end positions in an inserted mode, so that electric connection is achieved. Meanwhile, the motor assembly 71 also comprises a heat conducting plate 71-4 and a motor shaft 71-2, the magnet assembly 71-3 is installed on the motor shaft 71-2, a fan-shaped boss 71-8 is arranged on the heat conducting plate 71-4, and heat conducting glue is arranged between the auxiliary PCB 72a-2 and the fan-shaped boss 71-8 and used for conducting heat of the auxiliary PCB 72 a-2. And the RPS chip 72a-3 on the auxiliary PCB 72a-2 is positioned right above the magnet assembly 71-3 and is used for measuring a motor rotation angle signal.
After the ECU component 72a and the motor component 71 are mounted, the main PCB 77 is positioned by two main positioning columns 72a-9 on the ECU shell 72a-1 and is fixed on screw holes by fixing screws, and the transfer end of the right-angle Pin Pin 72a-8 is welded with a corresponding welding hole on the main PCB 77 to form a welding area so as to realize electric connection. And heat conduction grease 78 is arranged between the rectangular boss 71-9 and the main PCB 77 and used for heat conduction of the main PCB 77, and partition plates are arranged on two sides of the motor shell 71-1 to accelerate heat dissipation of the motor. The motor housing 71-1 is further provided with a rib which forms a complete circle with the rib on the ECU housing 72a-1 and is matched with the cover plate 73a together, the whole circle of rib and the cover plate 73a are bonded and sealed through a sealant 76, and the cover plate 73a is further provided with a clamping groove for limiting the cover plate 73 a.
Embodiment 2:
as shown in fig. 10 to 17, the other ECU assembly 72b is composed of another ECU housing 72b-1, another sub-PCB 72b-2, a plurality of mounting screws, and another connector 72b-7, the other connector 72b-7 is embedded and injection molded in the other ECU housing 72b-1, the other connector 72b-7 is connected to another right angle Pin 72b-8, another external connector port 72b-4 is provided in the other ECU housing 72b-1, the other external connector port 72b-4 includes a plurality of other port Pin 72b-6, and the other ECU housing 72b-1 is further provided with a bushing. The other pair of PCB boards 72b-2 is positioned by the other two positioning columns 72b-10 and is fixedly arranged on the bushing by mounting screws, and the switching end of the other right-angle Pin Pin 72b-8 is welded with the corresponding welding hole on the other pair of PCB boards 72b-2 to form a welding area; the interface welding end of the other interface Pin 72b-6 of the other external connector interface 72b-4 is welded with the corresponding welding hole on the other auxiliary PCB 72b-2 to form a welding area in sequence so as to realize electric connection.
The U-shaped groove on the other ECU shell 72b-1 is matched with the convex rib on the motor shell 71-1 through another bonding glue 710, so that the connection between the other ECU component 72b and the motor component 71 is realized. In addition, a rectangular boss 71-9 is arranged on the motor shell 71-1, another heat conduction grease 79 is arranged between the rectangular boss 71-9 and the other pair of PCB plates 72b-2 and used for heat conduction of the other pair of PCB plates 72b-2, and partition plates are arranged on two sides of the motor shell 71-1 to accelerate heat dissipation of the motor.
The motor component 71 is provided with a heat conducting plate 71-4, a motor shaft 71-2, a magnet component 71-3 is arranged on the motor shaft 71-2, and the motor component 71 is also provided with a three-phase power supply Pin needle 71-7. The heat conducting plate 71-4 is provided with a fan-shaped boss 71-8 and a screw hole. After the other ECU component 72b and the motor component 77 are mounted, the other main PCB 712 is positioned by another main positioning column 72b-9 at two positions on the other ECU housing 72b-1 and fixed on the screw holes by the fixing screws, and the transfer end of the other right-angle Pin 72b-8 is welded with the corresponding welding hole on the other main PCB 712 to form a welding area, so as to realize electrical connection. The Pin 71-7 of the three-phase power supply is welded with a corresponding welding hole on the other main PCB 712 to form a welding area. Another RPS chip 714 on another main PCB 712 is located directly above the magnet assembly 71-3 for motor rotation angle signal measurement. Another heat conducting glue 713 is arranged between the fan-shaped boss 71-8 and the other main PCB 712 and used for conducting heat of the other main PCB 712, a protruding rib is further arranged on the motor shell 71-1 and forms a complete circle with a protruding rib on the other ECU shell 72b-1 and is matched with the cover plate 73b together, the whole circle of rib and the cover plate 73b are bonded and sealed through another sealing glue 711, and a clamping groove is further formed in the cover plate 73b and used for limiting the cover plate 73 b.
The main PCB and the auxiliary PCB are vertically arranged on the side of the motor, the space volume is small, the length and the size of the PCB on the side of the motor are not limited by the diameter of the motor, and the PCB can be lengthened along with the lengthening of the motor shell, so that the components can be conveniently arranged.
Two PCB board heat dissipations all pass through heat conduction glue/heat conduction fat and reach motor casing, are equipped with two sets of baffles on the motor casing, improve the radiating efficiency.
The connector has realized the electricity of main PCB board with vice PCB board and has been connected, and the connector embedding is moulded plastics in ECU casing, and the integral type structure is compared with the single connector switching scheme of use, has simplified product structure and manufacturing procedure greatly, and is compared the cost lower with flexible PCB board mode.
The ECU component and the motor component are fixed, and the ECU component and the motor component are fixed with the cover plate in a gluing mode, so that the process is simple.
The external connector interface can flexibly select the implementation case 1 or the implementation case 2 according to the installation position and the operation space of the assembly.
Claims (17)
1. The utility model provides a power unit that electronic power assisted steering of compact, includes motor element, ECU subassembly, apron, its characterized in that: an ECU component (72) is connected to one side of the motor component (71), and the motor component (71) and the ECU component (72) are sealed through a cover plate (73).
2. The compact electric power steering power unit of claim 1, wherein: the ECU component (72) is positioned at the top position of the motor component (71) or at the side position of the motor component (71).
3. A compact electric power steering power unit according to claim 1 or 2, characterized in that: the top of the motor assembly (71) is connected with an ECU assembly (72 a) by adopting heat-conducting glue (74) and bonding glue (75); the side of motor element (71) adopt sealed glue (76) to be connected with apron (73 a), be located and be equipped with main PCB board (77) between the side of apron (73 a) and motor element (71), main PCB board (77) adopt set screw to be connected with motor element (71) all around respectively, main PCB board (77) and motor element (71) between be equipped with heat conduction fat (78).
4. A compact electric power steering power unit according to claim 3, characterized in that: the ECU component (72 a) comprises an ECU shell, an auxiliary PCB, an RPS chip, an external connector interface, a three-phase switching terminal, an interface Pin needle, a connector, a right-angle Pin needle, a main positioning column and an auxiliary positioning column, wherein a plurality of external connector interfaces (72 a-4) are arranged on one side of the top of the ECU shell (72 a-1), a plurality of interface Pin needles (72 a-6) are arranged in the external connector interfaces (72 a-4), the upper end of the connector (72 a-7) is connected to the inner wall of the ECU shell (72 a-1) below the external connector interfaces (72 a-4), the three-phase switching terminal (72 a-5) is respectively arranged on the inner wall of the other side of the top of the ECU shell (72 a-1), the auxiliary PCB (72 a-2) is connected to the lower side of the ECU shell (72 a-1) by adopting mounting screws, the lower end of the connector (72 a-7) is connected with the upper end of a right-angle Pin needle (72 a-8), and the lower end of the right-angle Pin needle (72 a-8) penetrates through the auxiliary PCB (72 a-2); the bottom of the auxiliary PCB (72 a-2) is connected with an RPS chip (72 a-3).
5. The compact electric power steering power unit of claim 4, wherein: the left side and the right side of the interior of the ECU shell (72 a-1) are respectively provided with an auxiliary positioning column (72 a-10), and the left side and the right side of the side surface of the ECU shell (72 a-1) are respectively provided with a main positioning column (72 a-9).
6. The compact electric power steering power unit of claim 4, wherein: the structure of the ECU shell (72 a-1) is matched with the structure of the top of the motor assembly (71).
7. A compact electric power steering power unit according to claim 3, characterized in that: the cover plate (73 a) and the main PCB (77) are of rectangular panel structures, and a plurality of clamping grooves are formed in the outer edge of the cover plate (73 a).
8. A compact electric power steering power unit according to claim 3, characterized in that: the sealant (76) is of a rectangular frame structure.
9. A compact electric power steering power unit according to claim 1 or 2, characterized in that: the side surface of the motor component (71) is connected with another ECU component (72 b) by adopting another heat conduction grease (79) and another bonding glue (710); the top of motor element (71) adopt another sealed glue (711) to be connected with another apron (73 b), be located to be equipped with another main PCB board (712) between the top of another apron (73 b) and motor element (71), the other main PCB board (712) adopt set screw to be connected with motor element (71) all around respectively, another main PCB board (712) and motor element (71) between be equipped with another heat-conducting glue (713), another RPS chip (714) is connected to the bottom of another main PCB board (712).
10. The compact electric power steering power unit of claim 9, wherein: the other ECU component (72 b) comprises another ECU shell, another auxiliary PCB board, another external connector interface, another three-phase switching terminal, another interface Pin needle, another connector, another right-angle Pin needle, another main positioning column and another auxiliary positioning column, a plurality of other external connector interfaces (72 b-4) are arranged on one side of the top of the other ECU shell (72 b-1), a plurality of other interface Pin needles (72 b-6) are arranged in the other external connector interfaces (72 b-4), the upper end of the other connector (72 b-7) is connected on the inner wall of the other ECU shell (72 b-1) below one side of the other external connector interface (72 b-4), another auxiliary PCB board (72 b-2) is connected below the other ECU shell (72 b-1) by adopting mounting screws, the lower end of the other connector (72 b-7) is connected with the upper end of the other right-angle Pin (72 b-8), and the lower end of the other right-angle Pin (72 b-8) penetrates through the other pair of PCB boards (72 b-2).
11. The compact electric power steering power unit of claim 10, wherein: the left side and the right side of the inside of the other ECU shell (72 b-1) are respectively provided with another auxiliary positioning column (72 b-10), and the side surface of the other ECU shell (72 b-1) is provided with the left side and the right side which are respectively provided with another main positioning column (72 b-9).
12. The compact electric power steering power unit of claim 10, wherein: the structure of the other ECU housing (72 b-1) is matched with the structure of the side surface of the motor assembly (71).
13. The compact electric power steering power unit of claim 9, wherein: the other cover plate (73 b) and the other main PCB (712) are of arc structures on one side of a rectangular panel, and a plurality of clamping grooves are formed in the outer edge of the other cover plate (73 b).
14. The compact electric power steering power unit of claim 9, wherein: the other bonding glue (710) is of a U-shaped frame structure.
15. A compact electric power steering power unit according to claim 1 or 2, characterized in that: the motor component (71) comprises a motor shell, a heat conduction plate, a motor shaft, a rotor, a stator, a three-phase power supply Pin needle and a magnet component, wherein the heat conduction plate (71-4) is connected to the top of the motor shell (71-1), the motor shaft (71-2) is arranged inside the motor shell (71-1), the rotor (71-5) is sleeved in the middle of the motor shaft (71-2), the stator (71-6) is sleeved on the outer side of the rotor (71-5), and the three-phase power supply Pin needle (71-7) is arranged at the upper end of the stator (71-6); the top of the motor shaft (71-2) penetrates through the heat-conducting plate (71-4) and is connected with the magnet assembly (71-3) by adopting a connecting piece; a fan-shaped boss (71-8) is arranged on the heat conducting plate (71-4) at one side of the magnet component (71-3).
16. The compact electric power steering power unit of claim 13, wherein: a plurality of rectangular bosses (71-9) are arranged on the side surface of the motor shell (71-1).
17. The compact electric power steering power unit of claim 13, wherein: the heat conducting plate (71-4) positioned at the other side of the magnet component (71-3) is provided with a kidney-shaped groove (71-10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210083390.8A CN114312989A (en) | 2022-01-25 | 2022-01-25 | Compact electric power-assisted steering power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210083390.8A CN114312989A (en) | 2022-01-25 | 2022-01-25 | Compact electric power-assisted steering power unit |
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| Publication Number | Publication Date |
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| CN114312989A true CN114312989A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210083390.8A Pending CN114312989A (en) | 2022-01-25 | 2022-01-25 | Compact electric power-assisted steering power unit |
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| CN (1) | CN114312989A (en) |
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| CN216943256U (en) * | 2022-01-25 | 2022-07-12 | 博世华域转向系统有限公司 | Compact electric power-assisted steering power unit with ECU assembly mounted laterally |
| CN218367968U (en) * | 2022-01-25 | 2023-01-24 | 博世华域转向系统有限公司 | Compact electric power steering's power unit structure |
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| JP2004114707A (en) * | 2002-09-20 | 2004-04-15 | Koyo Seiko Co Ltd | Electric power steering device |
| JP2010195219A (en) * | 2009-02-25 | 2010-09-09 | Nsk Ltd | Electric power steering device |
| JP2011031756A (en) * | 2009-08-01 | 2011-02-17 | Diamond Electric Mfg Co Ltd | Motor unit for electric power-steering and electric power-steering device |
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