An electric drive assembly, an electric power steering system, and a vehicle

Abstract

This utility model discloses an electric drive assembly, including a motor body, a connector, and a control circuit board. The motor body includes a housing and a motor structure installed within the housing. The windings of the motor structure are led out of the housing through multiple pins and arranged parallel to each other along a first direction. The connector includes a socket and a terminal block located on the socket. The socket is detachably fixedly connected to the housing, and when the socket is connected to the housing, the terminal block and the pins are oriented in the same direction. The control circuit board is connected to the housing along the first direction. Both the pins and the terminal blocks are inserted into the control circuit board along the first direction and are electrically connected to the control circuit board. The utility model also discloses an electric power steering system and a vehicle having the same assembly. The control circuit board of this utility model can simultaneously connect to the pins and terminal blocks during installation, which not only ensures precise positioning and convenient operation but also avoids mechanical stress at the electrical connection points during fixed installation, improving the reliability of the connection between the connector and the control circuit board.

Description

Technical Field

[0001] This utility model relates to the field of motor structure technology, specifically to an electric drive assembly, an electric power steering system, and a vehicle. Background Technology

[0002] Electric power steering (EPS) is a technology that uses an electric motor to provide auxiliary power, helping the driver easily steer the vehicle. It typically uses a rotary electric motor driven by a reduction gear mechanism such as a worm gear or ball screw to achieve steering knuckle deflection and wheel steering. It not only improves the ease of steering and high-speed stability but also enhances the vehicle's active safety, and has become a hot topic in automotive electronics technology development.

[0003] In related technologies, the electric drive assembly of an electric power steering system integrates the motor body and a control circuit board with soldered connectors into one unit. This reduces the assembly space required for assembly, making it suitable for narrower installation spaces. However, when the integrated circuit structure consisting of soldered connectors and control circuit board is installed onto the motor body, the solder joints of the connectors and control circuit board are subject to mechanical stress during installation, which can easily lead to cracking and damage of the solder joints. Utility Model Content

[0004] In view of the above problems, the present invention provides an electric drive assembly, an electric power steering system and a vehicle, which can improve the connection reliability of the connector and the control circuit board.

[0005] According to one aspect of the present invention, an electric drive assembly is provided, comprising: a motor body including a housing and a motor structure installed within the housing, wherein the windings of the motor structure are led out of the housing through a plurality of pins, and the plurality of pins are arranged parallel to each other along a first direction; a connector including a socket and a terminal block disposed on the socket, the socket being detachably fixedly connected to the housing, and when the socket is connected to the housing, the terminal block and the pins are arranged in the same orientation; and a control circuit board connected to the housing along the first direction; wherein the pins and the terminal block are both inserted into the control circuit board along the first direction and electrically connected to the control circuit board.

[0006] In an exemplary embodiment of the present invention, the housing has a first end face with its normal parallel to a first direction, and the PIN pins and connectors are both disposed along the first direction in the plane of the first end face; the control circuit board is locked and fixed to the first end face by a first connector, and the PIN pins and connectors are both disposed from the lower surface of the control circuit board along the first direction to the upper surface of the control circuit board, and are soldered and fixed to the control circuit board on the upper surface.

[0007] In an exemplary embodiment of this utility model, the first end face and / or connector are provided with positioning posts, and the control circuit board is provided with positioning holes corresponding to the positioning posts.

[0008] In an exemplary embodiment of the present invention, thermal adhesive is used to fill the space between the control circuit board and the first end face.

[0009] In an exemplary embodiment of this utility model, the motor body further includes a busbar, and the windings of the motor structure are connected to the PIN pins through the busbar.

[0010] In an exemplary embodiment of the present invention, a mounting base is provided on one side of the housing. The mounting base has an opening, and the connector is inserted into the mounting base along the inlet / outlet direction of the opening and is locked and fixed to the mounting base by a second connector.

[0011] In an exemplary embodiment of this utility model, a guide rail and a slide groove are provided between the mounting base and the socket, and the guide rail and the slide groove are both arranged along the inlet and outlet direction of the opening.

[0012] In an exemplary embodiment of this utility model, the motor body further includes an upper cover, the upper cover being provided with a plurality of first snap-fit ​​members in the circumferential direction, and the housing being provided with a plurality of second snap-fit ​​members in the circumferential direction corresponding to the first snap-fit ​​members; the upper cover is disposed on the connector and the control circuit board along the first direction, and the connection between the upper cover and the housing is realized by the first snap-fit ​​members engaging with the second snap-fit ​​members.

[0013] According to a second aspect of the present invention, an electric power steering system is provided, including the electric drive assembly described above.

[0014] According to a third aspect of the present invention, a vehicle is provided, including the electric power steering system described above.

[0015] This invention first fixes the connector to the housing, aligning the connector terminals and the PIN pins of the motor structure in the same direction. Then, the control circuit board is connected to the housing along the first direction. This allows the control circuit board to simultaneously connect to both the PIN pins and the connector terminals, resulting in precise positioning, reliable connection, compact assembly, and convenient operation. Furthermore, by fixing the connector before electrical connection, the mechanical stress at the electrical connection point during installation is avoided, improving the reliability of the connection between the connector and the control circuit board.

[0016] The above description is merely an overview of the technical solutions of the present utility model embodiments. In order to better understand the technical means of the present utility model embodiments and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present utility model embodiments more obvious and understandable, specific embodiments of the present utility model are described below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the internal structure of the electric drive assembly according to an embodiment of the present invention is shown;

[0019] Figure 2 This diagram shows a schematic of the connector installed in the housing according to an embodiment of the present invention.

[0020] Figure 3 This diagram shows a schematic of the control circuit board installed in the housing according to an embodiment of the present invention.

[0021] Figure 4 A schematic diagram of the connector structure according to an embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram of the structure of the motor body according to an embodiment of the present invention is shown;

[0023] Figure 6 A schematic diagram of the external structure of the electric drive assembly described in an embodiment of the present invention is shown. Figure 1 ;

[0024] Figure 7 A schematic diagram of the external structure of the electric drive assembly described in an embodiment of the present invention is shown. Figure 2 .

[0025] Explanation of icon numbers:

[0026] 1-Motor body, 11-Housing, 111-First end face, 1111-Lead-out hole, 1112-Temperature adhesive, 112-Positioning post, 113-Mounting base, 1131-Opening, 1132-Slide groove, 114-Second snap-fit ​​connector, 12-Motor structure, 13-PIN pin, 14-Top cover, 141-First snap-fit ​​connector

[0027] 2-Connector, 21-Socket, 211-Guide rail, 22-Terminal plug.

[0028] 3-Control circuit board, 31-Plug-in hole, 32-Positioning hole.

[0029] 4-First connector, 5-Second connector

[0030] z - First direction.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0033] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., may be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] Furthermore, the orientations or positional relationships indicated by terms such as "front," "rear," "left," "right," "up," and "down" mentioned in the embodiments of this utility model are based on the orientations or positional relationships shown in the accompanying drawings. The terms "inner" and "outer" mentioned in the embodiments of this application are defined based on the outline of the corresponding component. It is understood that the above-mentioned terms indicating orientations or positional relationships are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0036] like Figures 1 to 3As shown, this embodiment provides an electric drive assembly, including: a motor body 1, a connector 2, and a control circuit board 3. The motor body 1 includes a housing 11 and a motor structure 12 installed in the housing 11. The windings of the motor structure 12 are led out of the housing 11 through multiple pins 13, and the multiple pins 13 are arranged parallel to each other along a first direction z. The connector 2 includes a socket 21 and a terminal 22 disposed on the socket 21. The socket 21 is detachably fixedly connected to the housing 11. When the socket 21 is connected to the housing 11, the terminal 22 and the pins 13 are arranged in the same orientation. The control circuit board 3 is connected to the housing 11 along the first direction z. At this time, the pins 13 and the terminal 22 can be inserted into the control circuit board 3 along the first direction z and realize electrical connection with the control circuit board 3. In this way, when installing the control circuit board 3, it is possible to simultaneously connect to the PIN pin 13 and the connector terminal 22. This not only ensures accurate positioning and reliable connection, but also makes the assembly compact and the operation convenient. Furthermore, by fixing the connector first and then connecting it electrically, the mechanical stress at the electrical connection point during the fixed installation can be avoided, thus improving the reliability of the connection between the connector 2 and the control circuit board 3.

[0037] Specifically, such as Figures 1 to 3 As shown, the housing 11 has a first end face 111 with its normal parallel to the first direction z. In this embodiment, the first direction z is parallel to the axial direction of the motor structure 12. The first end face 111 has multiple lead-out holes 1111 corresponding to the PIN pins 13. The PIN pins 13 connected to the windings of the motor structure 12 extend from the lead-out holes 1111 along the first direction z from the first end face 111, which can ensure the accuracy of the winding lead-out position, thereby reducing assembly errors and improving production efficiency. The connector 2 is located on the horizontal side of the first end face 111 and is detachably fixed to the housing 11 through the connector 21. At this time, the PIN pins 13 and the connector terminals 22 are both inserted along the first direction z into the plane where the first end face 111 is located. Control circuit board The control circuit board 3 has a corresponding insertion hole 31 on the board surface corresponding to the PIN pin 13 and the plug terminal 22. The control circuit board 3 is moved along the first direction z with the board surface normal toward the first end face 111, so that the PIN pin 13 and the plug terminal 22 pass through the insertion hole 31 from the lower surface of the control circuit board 3 through the upper surface of the control circuit board 3. Then, the control circuit board 3 is locked and fixed to the first end face 111 by the first connector 4. The first connector 4 can be a screw or bolt, etc. By configuring a threaded hole on the first end face 111, and configuring a corresponding through hole on the control circuit board 3, the first connector 4 passes through the through hole on the control circuit board 3 and is threadedly connected to the threaded hole on the first end face 111, thus realizing the locking and fixing of the control circuit board 3 to the first end face 111.

[0038] At this point, the free ends of PIN pin 13 and connector terminal 22 extend from the upper surface of the control circuit board 3. PIN pin 13 and connector terminal 22 are then soldered and fixed to the control circuit board 3 on the upper surface, thus completing the effective installation of the control circuit board 3, connector 2, and motor structure 12 on the housing 11. This process is convenient and the connection is secure. Furthermore, since connector 2 and control circuit board 3 are already fixed, no additional clamps are needed when soldering connector terminal 22 to the control circuit board 3. This not only ensures convenient operation and precise alignment but also saves on assembly fixture costs.

[0039] It is understood that the aforementioned motor structure 12 is an existing structure that includes a stator and rotor, capable of converting electrical energy into kinetic energy to achieve rotational output, and will not be described in detail here. Furthermore, the detachable connection methods between the aforementioned socket 21 and the housing 11 include, but are not limited to, plug-in, snap-fit, and bolt connections, which will also not be described in detail here.

[0040] In some embodiments, such as Figure 2 and Figure 3 As shown, the first end face 111 and / or connector 2 are provided with positioning posts 112, and the control circuit board 3 is provided with positioning holes 32 corresponding to the positioning posts 112. When the control circuit board 3 is locked and fixed to the first end face 111, the positioning posts 112 pass through the positioning holes 32. In this way, when installing the control circuit board 3, the positioning posts 112 and positioning holes 32 can be connected to each other to achieve accurate positioning of the control circuit board 3, which facilitates the installation and fixing of the control circuit board 3.

[0041] In some embodiments, thermal paste 1112 can be filled between the control circuit board 3 and the first end face 111, such as... Figure 2 As shown, thermal adhesive 1112 is applied to the first end face 111. When the control circuit board 3 is locked and fixed to the first end face 111, the thermal adhesive 1112 fills the space between the control circuit board 3 and the first end face 111. At this time, the upper and lower end faces of the thermal adhesive 1112 are respectively attached to the lower surface of the control circuit board 3 and the first end face 111. The heat generated by the control circuit board 3 can be transferred to the first end face 111 and the housing 11 through the thermal adhesive 1112, thereby improving the heat dissipation performance of the control circuit board 3.

[0042] In some embodiments, the motor body 1 further includes a busbar (not shown), through which the windings of the motor structure 12 are connected to the corresponding PIN pins 13 of the current path. It is understood that the busbar can be made of a highly conductive material such as copper, and designed with a specific shape, such as an arc, according to the motor winding layout. The ends of each winding wire are connected to the corresponding busbar through processes such as welding and riveting, and then a unified interface is led out from a specific position on the busbar to connect to the corresponding PIN pin 13. In this way, on the one hand, the current carrying capacity of the windings can be improved through the busbar configuration, avoiding overheating of the circuit; on the other hand, the strength and rigidity of the busbar can provide stable support for the PIN pin 13, facilitating precise connection with external circuits.

[0043] In some embodiments, such as Figure 2 , Figures 4 to 6 As shown, a mounting base 113 is provided on one side of the housing 11. The mounting base 113 has an opening 1131. In this embodiment, the inlet and outlet direction of the opening 1131 is parallel to the first direction z and is opened downward along the first direction z. The connector 21 is inserted into the mounting base 113 along the inlet and outlet direction of the opening 1131 and is locked and fixed to the mounting base 113 by the second connector 5. The second connector 5 can be a screw or bolt, etc. By configuring a threaded hole on the mounting base 113 and a corresponding through hole on the connector 21, and threading the second connector 5 through the through hole on the connector 21 and threading it with the threaded hole on the mounting base 113, the connector can be locked and fixed to the mounting base 113.

[0044] It is understood that in other embodiments, the opening 1131 may also be opened upward along the first direction z or radially along the housing, as long as the plug can be inserted into and connected to the mounting base 113, so that the connector 2 can be detachably fixed to one side of the housing 11. In addition, the installation direction of the second connector 5 and the opening direction of the corresponding through hole and threaded hole may be set parallel to the in-and-out direction of the opening 1131, i.e., the first direction z, or perpendicular to the in-and-out direction of the opening 1131. After the plug is inserted into place along the in-and-out direction of the opening 1131, the second connector 5 is screwed in to achieve the locking and fixing of the plug and the mounting base 113.

[0045] In some embodiments, such as Figure 4 and Figure 5As shown, a guide rail 211 and a sliding groove 1132 are provided between the mounting base 113 and the socket 21, and both the guide rail 211 and the sliding groove 1132 are arranged along the inlet and outlet direction of the opening 1131. Specifically, in this embodiment, two sets of guide rails 211 and sliding grooves 1132 are provided. The two sets of guide rails 211 are respectively arranged on the opposite outer side of the socket 21, while the sliding grooves 1132 are respectively arranged on the opposite inner side of the opening 1131 of the mounting base 113. When the socket 21 is inserted into the mounting base 113 along the inlet and outlet direction of the opening 1131, the guide rail 211 is covered by the sliding groove 1132. Through the cooperation of the guide rail 211 and the sliding groove 1132, the socket 21 can slide along the rail in the mounting base 113, restricting the movement trajectory of the socket 21 and ensuring its smooth movement, thus ensuring that the socket 21 is accurately aligned.

[0046] In some embodiments, such as Figure 1 , Figure 6 and Figure 7 As shown, the motor body 1 also includes an upper cover 14. The upper cover 14 has several first snap-fit ​​pieces 141 arranged circumferentially, and the housing 11 has several second snap-fit ​​pieces 114 arranged circumferentially to match the first snap-fit ​​pieces 141. The upper cover 14 covers the connector 2 and the control circuit board 3 along the first direction z, and the upper cover 14 is connected to the housing 11 by snapping together with the first snap-fit ​​pieces 141 and the second snap-fit ​​pieces 114. In this way, the upper cover 14 and the housing 11 are fixedly connected by the snap-fit ​​between the first snap-fit ​​pieces 141 and the second snap-fit ​​pieces 114. The connection is stable and reliable, and more convenient and faster than bolt connections. The upper cover 14 can be installed and removed without special tools, which helps improve production and subsequent maintenance efficiency.

[0047] Specifically, in this embodiment, the first snap-fit ​​member 141 and the second snap-fit ​​member 114 can be a matching buckle and a slot. When the upper cover 14 moves downward along the first direction z to a preset position, the buckle can engage with the slot. At this time, the upper cover 14 covers the connector 2 and the control circuit board 3, which can isolate the connector 2 and the control circuit board 3 from the external environment, thereby protecting the connector 2 and the control circuit board 3. Moreover, the engagement between the slot and the buckle is not easy to fall off after locking, and the connection is stable and reliable.

[0048] It is understood that in other embodiments, the second snap-fit ​​member 114 can also be designed as a snap-fit, and the first snap-fit ​​member 141 can be designed as a slot, achieving the same effect, which will not be elaborated here. In other embodiments, the snap-fit ​​method of the first snap-fit ​​member 141 and the second snap-fit ​​member 114 includes, but is not limited to, the snap-fit ​​structure mentioned in the prior art, such as the male and female stop locking, which will also not be elaborated here.

[0049] In addition, in another embodiment, an electric power steering system is provided, including the electric drive assembly described in the above embodiments. For other structures and working principles of the electric drive assembly, please refer to the above description of the embodiments of the electric drive assembly; for other structures of the electric resistance steering system, please refer to the prior art. Since the electric drive assembly has the above-mentioned technical effects, the electric power steering system having this electric drive assembly should also have corresponding technical effects, which will not be elaborated here.

[0050] In another embodiment, a vehicle is also provided, including the electric power steering system of the above embodiments, wherein the electric power steering system includes the electric drive assembly of the above embodiments. For other structures and working principles of the electric drive assembly, please refer to the above description of the embodiments of the electric drive assembly; for other structures of the electric resistance steering system and the vehicle, please refer to the prior art. Since the electric resistance steering system has the above-mentioned technical effects, a vehicle having this electric resistance steering system should also have the corresponding technical effects, which will not be elaborated further here.

[0051] It is understood that, in this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified. The terms "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model.

[0053] The illustrative expressions of the terms used above do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction.

[0054] Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, substitutions and variations to the above embodiments within the scope of the present invention. Therefore, any changes or modifications made in accordance with the claims and description of the present invention should fall within the scope of the patent coverage of the present invention.

Claims

1. An electric drive assembly, characterized in that, include: The motor body includes a housing and a motor structure installed inside the housing. The windings of the motor structure are led out of the housing through a plurality of pins, and the plurality of pins are arranged parallel to each other along a first direction. A connector includes a socket and a terminal block disposed on the socket. The socket is detachably fixedly connected to the housing, and when the socket is connected to the housing, the terminal block and the pin are oriented in the same direction. and A control circuit board is connected to the housing along the first direction; wherein... Both the PIN pin and the connector terminal are inserted into the control circuit board along the first direction and are electrically connected to the control circuit board.

2. The electric drive assembly according to claim 1, characterized in that, The housing has a first end face with its normal parallel to the first direction. The PIN pin and the connector are both inserted along the first direction in the plane of the first end face. The control circuit board is locked and fixed to the first end face by a first connector. The PIN pin and the connector are both inserted from the lower surface of the control circuit board along the first direction to the upper surface of the control circuit board, and are soldered and fixed to the control circuit board on the upper surface.

3. The electric drive assembly according to claim 2, characterized in that, The first end face and / or the connector are provided with positioning posts, and the control circuit board is provided with positioning holes corresponding to the positioning posts.

4. An electric drive assembly according to claim 2, characterized in that, Thermal adhesive is used to fill the space between the control circuit board and the first end face.

5. An electric drive assembly according to claim 1, characterized in that, The motor body also includes a busbar, and the windings of the motor structure are connected to the PIN pins through the busbar.

6. An electric drive assembly according to any one of claims 1-5, characterized in that, A mounting base is provided on one side of the housing. The mounting base has an opening. The connector is inserted into the mounting base along the inlet / outlet direction of the opening and is locked and fixed to the mounting base by a second connector.

7. An electric drive assembly according to claim 6, characterized in that, The mounting base and the socket are provided with a guide rail and a slide groove that cooperate with each other, and the guide rail and the slide groove are both arranged along the inlet and outlet direction of the opening.

8. An electric drive assembly according to claim 7, characterized in that, The motor body also includes an upper cover, the upper cover having a plurality of first snap-fit ​​components circumferentially arranged, and the housing having a plurality of second snap-fit ​​components circumferentially arranged to match the first snap-fit ​​components; the upper cover is disposed on the connector and the control circuit board along the first direction, and the connection between the upper cover and the housing is realized by the first snap-fit ​​components engaging with the second snap-fit ​​components.

9. An electric power steering system, characterized in that, Includes an electric drive assembly as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes the electric power steering system as described in claim 9.

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