Driving device and manufacturing method thereof

Abstract

This invention discloses a driving device and its manufacturing method. The driving device includes a housing assembly, a motor, and a control component. The housing assembly includes a first limiting post, a housing, and a lead pin. The control component has a limiting hole. The first limiting post includes a first part and a second part. The first part is located between the second part and a bottom wall. At least a portion of the orthographic projection of the second part onto the bottom wall is located outside the outer contour of the orthographic projection of the first part onto the bottom wall. The first part is fitted into the limiting hole. The positioning surface of the second part contacts and is fixed to the surface of the control component facing away from the bottom wall. The control component includes a circuit board and a second control terminal. The second control terminal is electrically connected to the lead pin. The distance between the surface of the circuit board facing away from the bottom wall and the surface of the lead pin facing away from the bottom wall is within a preset range. This improves the electrical connection stability between the control component and the lead pin, and enhances the performance of the driving device.

Description

Technical Field

[0001] This application relates to the field of drive control technology, specifically to a drive device and its manufacturing method. Background Technology

[0002] Drive units are widely used in various devices that require driving (such as fluid control valves). Typically, a motor, a control unit, and lead pins are installed in the drive unit. The lead pins are used to connect to external electrical equipment to realize the input of electrical signals. The lead pins need to be electrically connected to the signal terminals of the control unit so that the electrical signals of the external electrical equipment are transmitted to the control unit through the lead pins, so that the control unit controls the operation of the motor.

[0003] In some drive units, external signals cannot be transmitted effectively to the control components through lead wires and pins, affecting the performance of the drive unit. Summary of the Invention

[0004] The purpose of this application is to provide a drive device and a method for manufacturing the same, which can improve the electrical connection stability between the control component and the lead pin, so that external signals can be stably transmitted to the control component through the lead pin, thereby improving the performance of the drive device.

[0005] On one hand, embodiments of the present invention provide a driving device, including a housing assembly, a motor, and a control component. The housing assembly has a receiving cavity, and the motor and the control component are located in the receiving cavity. The housing assembly includes a first limiting post and a housing. The housing includes a bottom wall. The first limiting post protrudes from the bottom wall and extends toward the receiving cavity. The control component has a limiting hole that penetrates the control component along its thickness direction. At least a portion of the first limiting post is sleeved in the limiting hole.

[0006] The motor includes a main body, an electrical connection terminal, and an output shaft. The electrical connection terminal is located at one end of the main body, and the output shaft is located at the other end of the main body. The control component is located on the side of the main body away from the electrical connection terminal. The control component includes a first control terminal. The drive device also includes a conductive component. At least a portion of the conductive component is located in the receiving cavity. The electrical connection terminal is electrically connected to the first control terminal through the conductive component.

[0007] The first limiting post includes a first part and a second part connected to each other. The first part is located between the second part and the bottom wall. The orthographic projection of the second part on the bottom wall forms a first projection, and the orthographic projection of the first part on the bottom wall forms a second projection. At least a portion of the first projection is located outside the outer contour of the second projection. The first part is fitted into the limiting hole. The second part includes a positioning surface, which contacts and is fixedly connected to the surface of the control member opposite to the bottom wall.

[0008] The housing assembly further includes lead pins, each lead pin comprising a first segment and a second segment connected to each other. The first segment is embedded in the bottom wall, and the second segment is located within the receiving cavity. The control component further includes a circuit board and a second control terminal, the second control terminal being electrically connected to the lead pins. The distance between the surface of the circuit board facing away from the bottom wall and the surface of the lead pin facing away from the bottom wall is within a preset range.

[0009] On the other hand, embodiments of the present invention also provide a method for manufacturing a driving device, comprising:

[0010] The system provides a control component, a housing assembly, and a motor. The control component includes a circuit board, a first control terminal, and a second control terminal, which are electrically connected to a circuit on the circuit board. The control component has a limiting hole that penetrates the control component along its thickness direction. The housing assembly includes a housing, at least two positioning posts, and lead pins. The positioning posts and lead pins are fixedly connected to the housing. The housing includes a bottom wall and a receiving cavity. The positioning posts protrude from the bottom wall and extend toward the receiving cavity. The lead pins include a first segment and a second segment connected to each other. The first segment is embedded in the bottom wall, and the second segment is located within the receiving cavity.

[0011] The control component is placed inside the receiving cavity and the limiting hole is fitted onto the outer periphery of the positioning post;

[0012] At least one of the positioning posts is heated away from the bottom wall using a hot riveting process, so that the end is laid flat along the surface of the circuit board away from the bottom wall to form a first limiting post and the first limiting post is in contact with and fixedly connected to the surface of the circuit board away from the bottom wall. The first limiting post ensures that the distance between the surface of the circuit board away from the bottom wall and the second section of the surface away from the bottom wall is within a preset range.

[0013] The motor is positioned within the receiving cavity such that the electrical connection terminal is located at the end of the motor furthest from the control element.

[0014] According to the driving device and its manufacturing method provided in the embodiments of the present invention, the housing assembly of the driving device includes a first limiting post. A first part of the first limiting post is sleeved in the limiting hole of the control component, so that the limiting post can limit the position of the control component. At the same time, the second part of the first limiting post includes a positioning surface, which contacts and is fixedly connected to the surface of the control component away from the bottom wall of the housing. This allows the control component to be fixedly installed in the receiving cavity of the housing, preventing the conductive component from exerting force on the control component during the assembly process of the motor, thus preventing the control component from tilting. This keeps the distance between the surface of the circuit board away from the bottom wall and the surface of the lead pin away from the bottom wall within a preset range, preventing unstable electrical connection between the second control terminal and the lead pin when the control component tilts, thereby improving the performance of the driving device. Attached Figure Description

[0015] Figure 1 This is an exploded structural diagram of a driving device provided in one embodiment of the present invention;

[0016] Figure 2 This is a partial structural schematic diagram of a housing assembly provided in one embodiment of the present invention;

[0017] Figure 3 This is a partial schematic diagram of the assembly structure of the motor, housing assembly, and control components provided in one embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the assembly structure of a motor, a control component, and a conductive component provided in one embodiment of the present invention;

[0019] Figure 5 This is a top view schematic diagram of the assembly structure of the housing assembly and control components provided in one embodiment of the present invention;

[0020] Figure 6 yes Figure 5 A cross-sectional view along the AA direction;

[0021] Figure 7 yes Figure 5 A cross-sectional schematic diagram of another assembly structure of the housing assembly and control components is shown in the figure;

[0022] Figure 8 yes Figure 7 Enlarged schematic diagram of region Q1;

[0023] Figure 9 yes Figure 2 A cross-sectional schematic diagram of the housing assembly is shown in the figure;

[0024] Figure 10 yes Figure 7 Enlarged schematic diagram of region Q2;

[0025] Figure 11This is a schematic flowchart of a method for manufacturing a drive device according to an embodiment of the present invention. Detailed Implementation

[0026] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. In this document, relational terms such as "first" and "second" are used merely to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0027] like Figures 1 to 5 This invention provides a driving device 100, including a housing assembly 10, a motor 20, a control component 30, a transmission assembly, and a cover 50. The housing assembly 10 includes at least two limiting posts 12, a housing 11, and lead pins 13. The cover 50 and the housing 11 can be fastened together and fixedly connected by welding to achieve a sealing performance. The limiting posts 12 are fixedly connected to the housing 11, and the lead pins 13 are fixedly connected to the housing 11. The housing 11 includes a bottom wall 111 and side walls 112, and has a receiving cavity 101. The bottom wall 111 and side walls 112 surround the receiving cavity 101. The limiting posts 12 protrude from the bottom wall 111 and extend into the receiving cavity 101. Extending in the 01 direction, optionally, the housing 11 can be made of plastic, the limiting post 12 can be integrally injection molded with the housing 11 or fixedly connected by fasteners, and the lead pin 13 can be fixedly connected with the housing 11 by injection molding to form an integral structure. A portion of the lead pin 13 is located in the receiving cavity 101, and a portion protrudes from the bottom wall 111 and extends in a direction away from the receiving cavity 101. Optionally, the housing 11 may also include a protrusion 113, the protrusion 113 having a lead socket, and a portion of the lead pin 13 is located in the lead socket.

[0028] The motor 20 is located in the receiving cavity 101. The motor 20 includes a main body 21, an electrical connection terminal 22, and an output shaft 23. The electrical connection terminal 22 is located at one end of the main body 21, and the output shaft 23 is located at the other end of the main body 21. The electrical connection terminal 22 of the motor 20 is electrically connected to the control component 30 so that the electrical connection terminal 22 can receive the power supply signal from the control component 30 and control the output shaft 23 to rotate. When the drive device 100 is applied to a fluid control valve, the output shaft 23 can drive the valve core of the control valve to rotate through the transmission assembly, thereby realizing the control function of the control valve on the fluid. It is understood that the drive device 100 can also be applied to other devices that require driving.

[0029] like Figure 1 and Figure 3In this embodiment, the control member 30 is located in the receiving cavity 101. The control member 30 is located on the side of the main body 21 away from the electrical connection terminal 22. The control member 30 has at least two spaced limiting holes 34. The limiting holes 34 penetrate the control member 30 along the thickness direction. At least a portion of the limiting post 12 is sleeved in the limiting hole 34 so that the limiting post 12 limits the position of the control member 30. To make the drive device 100 compact, the orthographic projection of the output shaft 23 on the bottom wall 111 overlaps with the orthographic projection of the control component 30 on the bottom wall 111. Compared to arranging the output shaft 23 of the motor 20 and the control component 30 side by side, this embodiment of the invention reduces the space occupied by the motor 20 and the control component 30, reduces the size of the housing 11, and thus saves space occupied by the drive device 100. At the same time, when the control component 30 includes a Hall element and the drive device 100 also includes a magnetic element, the magnetic element rotates synchronously with the output shaft 23 and is assembled and fixed to the output shaft 23 through a worm gear. By setting the orthographic projection of the output shaft 23 on the bottom wall 111 to overlap with the orthographic projection of the control component 30 on the bottom wall 111, this embodiment of the invention facilitates the magnetic element and the Hall element to be close to each other, so that the Hall element is within the magnetic range of the magnetic element to accurately detect the operating status of the motor 20.

[0030] The control unit 30 includes a circuit board 31, a first control terminal 32, and a second control terminal 33, which are located on the circuit board 31. Optionally, the control unit 30 may also include a Hall element located on the circuit board 31. The Hall element can cooperate with the magnetic element in the drive device 100 to detect the operating status of the motor 20. The drive device 100 also includes a conductive element 40, at least a portion of which is located in the receiving cavity 101. The electrical connection terminal 22 is electrically connected to the first control terminal 32 through the conductive element 40, enabling stable transmission of electrical signals between the control unit 30 and the electrical connection terminal 22 of the motor 20.

[0031] like Figures 4 to 6 In specific implementation, the conductive element 40 includes a first conductive portion 41, a second conductive portion 42, and a wiring portion 43. The wiring portion 43 is located between the first conductive portion 41 and the second conductive portion 42. The conductive element 40 can be a rigid conductive element. At least a portion of the wiring portion 43, a portion of the first conductive portion 41, and a portion of the second conductive portion 42 can be embedded inside the bottom wall 111. The first control terminal 32 and the first conductive portion 41 of the conductive element 40 can also be electrically connected by welding or snap-fit ​​connection. The electrical connection terminal 22 and the second conductive portion 42 of the conductive element 40 can also be electrically connected by welding or snap-fit ​​connection. Alternatively, as... Figure 7As shown, the conductive element 40 can be a flexible conductive element. The conductive element 40 is located in the receiving cavity 101. The first control terminal 32 and the first conductive portion 41 of the conductive element 40 can be electrically connected by welding. The electrical connection terminal 22 and the second conductive portion 42 of the conductive element 40 can also be electrically connected by welding. To enable the control element 30 to receive electrical signals from external electrical devices, the second control terminal 33 of the control element 30 is electrically connected to the lead pin 13. In specific implementations, the second control terminal 33 and the lead pin 13 can be electrically connected by welding or snap-fitting.

[0032] Since the electrical connection terminal 22 of the motor 20 and the first control terminal 32 of the control component 30 are electrically connected through the conductive component 40, during the assembly of the drive device 100, after the limiting hole 34 of the control component 30 is fitted onto the outer periphery of the limiting post 12 for limiting, the electrical connection terminal 22 will exert a force on the conductive component 40 during the assembly of the motor 20. This can easily cause the conductive component 40 to exert a force on the control component 30 and cause the control component 30 to tilt. This can easily lead to unstable electrical connection between the second control terminal 33 of the control component 30 and the lead wire pin 13, such as causing poor soldering, weak soldering, or unstable connection. This can easily lead to external signals not being able to be transmitted to the control component 30 through the lead wire pin 13, affecting the performance of the drive device 100.

[0033] To improve the stability of the electrical connection between the control element 30 and the lead pin 13, such as Figures 5 to 9In some embodiments, the limiting post 12 of the housing assembly 10 includes a first limiting post 121. The first limiting post 121 includes a first part 1211 and a second part 1212 connected to each other. Along the height direction of the first limiting post 121, the first part 1211 is located between the second part 1212 and the bottom wall 111. The first part 1211 is sleeved in the limiting hole 34 and can be clearance-fitted with the limiting hole 34 to limit the position of the control member 30. The second part 1212 is located in... The orthographic projection on the bottom wall 111 forms a first projection, and the orthographic projection of the first portion 1211 on the bottom wall 111 forms a second projection. At least a portion of the first projection is located outside the outer contour of the second projection. The second portion 1212 includes a positioning surface that contacts and is fixedly connected to the surface of the control member 30 away from the bottom wall 111, so that the first limiting post 121 fixes the position of the control member 30, preventing the control member 30 from tilting due to the force exerted by the conductive element 40 on the motor 20 during assembly. Optionally, the first limiting post 121 also includes a first support portion 1213 located between the first portion 1211 and the bottom wall 111. The orthographic projection of the first support portion 1213 on the bottom wall 111 forms a third projection, and at least a portion of the third projection is located outside the outer contour of the second projection, so that the control member 30 can contact the surface of the first support portion 1213 away from the bottom wall 111. In specific implementation, both the first part 1211 of the first limiting post 121 and the first support part 1213 can be cylindrical structures.

[0034] Please refer to further information. Figure 6 and Figure 7 The lead pin 13 of the housing assembly 10 includes a first segment, a second segment, and a third segment connected to each other. Along the height direction of the lead pin 13, the first segment is located between the second segment and the third segment. The first segment is embedded in the bottom wall 111, the second segment is located in the receiving cavity 101, and the third segment is located in the lead socket 1131. In order to improve the electrical connection stability between the lead pin 13 and the second control terminal 33 of the control component 30, the distance between the surface of the circuit board 31 facing away from the bottom wall 111 and the surface of the lead pin 13 facing away from the bottom wall 111 is defined as d, and the value of d is within a preset range.

[0035] In some embodiments, the second control terminal 33 is soldered to the lead pin 13 to ensure stable transmission of electrical signals between the lead pin 13 and the second control terminal 33. To improve the soldering stability between the second control terminal 33 and the lead pin 13 and reduce incomplete soldering or poor soldering, a value of 1.4mm ≤ d ≤ 2mm can be set, where the value of d can be set according to user requirements, for example, 1.4mm, 1.5mm, 1.6mm, 1.7mm, or 2mm. Alternatively, the second control terminal 33 can be snap-fitted to the lead pin 13, in which case 2.5mm ≤ d ≤ 3mm can improve the stability of the snap-fit ​​connection between the second control terminal 33 and the lead pin 13, where the value of d can be set according to user requirements, for example, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3mm. It should be noted that the value of d can be set according to user needs. When the second control terminal 33 is soldered to the lead pin 13, the value of d meets the soldering distance requirements; when the second control terminal 33 and the lead pin 13 are engaged, the value of d ensures that the two are tightly engaged and the electrical signal is transmitted stably. Through the above settings, this embodiment of the invention, by setting the first limiting post 121, can keep the position of the control component 30 fixed, and after the position is fixed, the distance d between the surface of the circuit board 31 of the control component 30 facing away from the bottom wall 111 and the surface of the lead pin 13 facing away from the bottom wall 111 is within a preset range. This can improve the electrical connection stability between the second control terminal 33 and the lead pin 13, prevent the influence of the motor 30 on the control component 30 during assembly, and improve the performance of the drive device 100.

[0036] like Figure 5 and Figure 6 After the first limiting post 121 fixes the position of the control component 30, the surface of the circuit board 31 of the control component 30 facing away from the bottom wall 111 is parallel to at least a portion of the inner surface of the bottom wall 111. The drive device 100 includes at least two lead pins 13, and the second control terminal 33 of the control component 30 includes a through hole. The surface of each lead pin 13 facing away from the bottom wall 111 protrudes from the surface of the control component 30 facing away from the bottom wall 111, or the surface of each lead pin 13 facing away from the bottom wall 111 is flush with the surface of the control component 30 facing away from the bottom wall 111. Each lead pin 13 is sleeved in the through hole and soldered to the second control terminal 33. Alternatively, the lead pin 13 may also include a spring piece, which deforms when inserted into the through hole, causing the lead pin 13 to engage with the second control terminal 33.

[0037] like Figure 5 , Figure 7 and Figure 10In some embodiments, the limiting post 12 of the housing assembly 10 further includes a second limiting post 122. The first limiting post 121 is disposed closer to the second control terminal 33 relative to the second limiting post 122. The second limiting post 122 includes a third portion 1221 and a second support portion 1222. The second support portion 1222 is located between the third portion 1221 and the bottom wall 111. Along the height direction of the second limiting post 122, the second support portion 1222 is located between the third portion 1221 and the bottom wall 111. The orthographic projection of the three parts 1221 on the bottom wall 111 is located inside the orthographic projection of the limiting hole 34 on the bottom wall 111. At least a portion of the orthographic projection of the second support part 1222 on the bottom wall 111 is located outside the outer contour of the orthographic projection of the third part 1221 on the bottom wall 111. The surface of the second limiting post 122 facing away from the bottom wall 111 is higher than the surface of the circuit board 31 facing away from the bottom wall 111, or the surface of the second limiting post 122 facing away from the bottom wall 111 is flush with the surface of the circuit board 31 facing away from the bottom wall 111. Based on this, the total number of the first limiting post 121 and the second limiting post 122 can be three, and the line connecting the centers of the orthographic projections of the first limiting post 121 and the second limiting post 122 on the bottom wall 111 forms a triangle.

[0038] Alternatively, in some embodiments, the housing assembly 10 includes three first limiting posts 121, the center of the orthographic projection of the three first limiting posts 121 on the bottom wall 111 forming a triangle, so that all three first limiting posts 121 can fix the position of the control member 30.

[0039] In some embodiments, the first limiting post 121 is integrally injection molded with the housing 11, and the first limiting post 121 is fixedly connected to the control member 30 by a hot riveting process, so that the first limiting post 121 can better fix the position of the control member 30. Optionally, the second limiting post 122 can also be integrally injection molded with the housing 11.

[0040] In summary, according to the driving device 100 provided in the embodiments of the present invention, the housing assembly 10 of the driving device 100 includes a first limiting post 121. The first part 1211 of the first limiting post 121 is sleeved in the limiting hole 34 of the control member 30, so that the limiting post 121 can limit the position of the control member 30. At the same time, the second part 1212 of the first limiting post 121 includes a positioning surface. The positioning surface contacts and is fixedly connected to the surface of the control member 30 away from the bottom wall 111. This allows the control member 30 to be fixedly disposed in the receiving cavity 101 of the housing 11, preventing the control member 30 from tilting due to the force exerted by the conductive member 40 on the motor 20 during assembly. This keeps the distance between the surface of the circuit board 31 away from the bottom wall and the surface of the lead pin 13 away from the bottom wall 111 within a preset range, preventing the unstable electrical connection between the second control terminal 33 and the lead pin 13 when the control member 30 tilts. This improves the performance of the driving device 100.

[0041] like Figures 1 to 4 and Figure 11 The present invention also provides a method for manufacturing a drive device, comprising:

[0042] S110 provides a control unit 30, a housing assembly 10, and a motor 20.

[0043] The control component 30 includes a circuit board 31, a first control terminal 32 and a second control terminal 33. The first control terminal 32 and the second control terminal 33 are electrically connected to the circuit on the circuit board 31. The control component 30 has a limiting hole 34 that penetrates the control component 30 along its thickness direction. The housing assembly 10 includes a housing 11, at least two positioning posts and lead pins 13. The positioning posts and lead pins 13 are fixedly connected to the housing 11. The housing 11 includes a bottom wall 111 and has a receiving cavity 101. The positioning posts protrude from the bottom wall 111 and extend toward the receiving cavity 101. The lead pins 13 include a first segment and a second segment that are connected to each other. The first segment is embedded in the bottom wall 111 and the second segment is located in the receiving cavity 101.

[0044] S120, Place the control component 30 in the receiving cavity 101 and fit the limiting hole 34 on the outer periphery of the positioning post;

[0045] S130. Using a hot riveting process, heat the end of at least one positioning post away from the bottom wall 111, so that the end is laid flat along the surface of the circuit board 31 away from the bottom wall 111 to form a first limiting post 121 and make the first limiting post 121 contact and fix it to the surface of the circuit board 31 away from the bottom wall 111.

[0046] In this embodiment of the invention, after the end of the positioning post away from the bottom wall 111 is heated and laid flat on the surface of the circuit board 31 away from the bottom wall 111, the positioning post forms a first limiting post 121. After the first limiting post 121 is fixedly connected to the circuit board 31, the distance between the surface of the circuit board 31 away from the bottom wall 111 and the surface of the lead pin 13 away from the bottom wall 111 is defined as d, and the value of d is within a preset range.

[0047] S140. The motor 20 is placed inside the receiving cavity 101.

[0048] In this embodiment, the motor 20 includes a main body 21, an electrical connection terminal 22, and an output shaft 23. The electrical connection terminal 22 is located at one end of the main body 21, and the output shaft 23 is located at the other end of the main body 21. When the motor 20 is placed in the receiving cavity 101, the electrical connection terminal 22 of the motor 20 is located at the end of the main body 21 away from the control member 30, and the orthographic projection of the output shaft 23 of the motor 20 on the bottom wall 111 overlaps with the orthographic projection of the control member 30 on the bottom wall 111.

[0049] According to the manufacturing method of the drive device of the present invention, by forming a first limiting post 121 and making the first limiting post 121 contact and fix it to the surface of the circuit board 31 away from the bottom wall 111, the control member 30 can be fixedly disposed in the receiving cavity 101 of the housing 11. This prevents the control member 30 from tilting due to the force exerted by the conductive member 40 on the motor 20 during assembly. As a result, the distance between the surface of the circuit board 31 away from the bottom wall and the surface of the lead pin 13 away from the bottom wall 111 is kept within a preset range. This prevents the second control terminal 33 from being electrically unstable when the control member 30 tilts, thereby improving the performance of the drive device 100.

[0050] In some embodiments, after heating the end of at least one positioning post away from the bottom wall 111 using a hot riveting process, the manufacturing method of the drive device further includes: welding the second control terminal 33 of the control member 30 to the second segment of the lead pin 13 to electrically connect the second control terminal 33 to the lead pin 13. To improve the welding stability between the second control terminal 33 and the lead pin 13 and reduce the phenomenon of incomplete soldering or poor welding, a value of 1.4mm ≤ d ≤ 2mm can be set, where the d value can be set according to user requirements, for example, it can be 1.4mm, 1.5mm, 1.6mm, 1.7mm or 2mm.

[0051] Alternatively, the second control terminal 33 of the control component 30 can also be engaged with the lead pin 13. In this case, 2.5mm≤d≤3mm can improve the stability of the engagement between the second control terminal 33 and the lead pin 13. The value of d can be set according to user requirements, such as 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm.

[0052] In some embodiments, the number of positioning posts is three, and the line connecting the centers of the orthographic projections of the three positioning posts on the bottom wall 111 forms a triangle. The step of heating the end of at least one positioning post away from the bottom wall 111 using a hot riveting process includes: heating the ends of one or two positioning posts near the second control terminal 33 away from the bottom wall 111 using a hot riveting process, so that the positioning post after the hot riveting process forms a first limiting post 121, and the positioning post without the hot riveting process forms a second limiting post; or heating the ends of all three positioning posts away from the bottom wall 111 using a hot riveting process to form three first limiting posts 121.

[0053] In some embodiments, the motor 20 includes an electrical connection terminal 22, the drive device further includes a conductive element 40, and the method of manufacturing the drive device may further include providing the conductive element 40, the conductive element 40 including a first conductive portion 41 and a second conductive portion 42 that are electrically connected to each other.

[0054] Based on this, the conductive element 40 can be a flexible wire. Before step S120, which involves placing the control element 30 into the receiving cavity 101 and fitting the limiting hole 34 onto the outer periphery of the positioning post, the manufacturing method of the drive device includes: welding the first control terminal 32 of the control element 30 to the first conductive portion 41 of the conductive element 40 to electrically connect the first control terminal 32 and the first conductive portion 41; and welding the electrical connection terminal 22 of the motor 20 to the second conductive portion 42 of the conductive element 40 to electrically connect the electrical connection terminal 22 and the second conductive portion 42. This arrangement facilitates improved welding stability between the control element 30, the motor 20, and the conductive element 40.

[0055] In some embodiments, the first conductive part 41 is a rigid conductive part, and the conductive member 40 further includes a wiring part 43 connecting the first conductive part 41 and the second conductive part 42. The wiring part 43 is embedded in the bottom wall 111, and at least a portion of the first conductive part 41 is located in the receiving cavity 101. At this time, step S120, the step of placing the control member 30 in the receiving cavity 101 and fitting the limiting hole 34 onto the outer periphery of the positioning post, includes:

[0056] Place the control component 30 into the receiving cavity 101;

[0057] The limiting hole 34 is fitted onto the outer periphery of the positioning post;

[0058] The control element 30 is engaged with the first conductive part 41 so that the control element 30 is electrically connected to the first conductive part 41.

[0059] In some embodiments, the second conductive part 42 is a rigid conductive part, and the conductive member 40 further includes a wiring part 43 connecting the first conductive part 41 and the second conductive part 42. The wiring part 43 is embedded in the bottom wall 111, and at least a portion of the second conductive part 42 is located in the receiving cavity 101. At this time, step S140, the step of placing the motor 20 in the receiving cavity 101, includes:

[0060] The motor 20 is placed in the receiving cavity 101 and the electrical connection terminal 22 is engaged with the second conductive part 42 so that the electrical connection terminal 22 is electrically connected to the second conductive part 42.

[0061] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A drive device comprising a housing assembly having a receiving cavity, a motor and a control located in the receiving cavity, characterized in that, The housing assembly includes a first limiting post and a housing, the housing including a bottom wall, the first limiting post protruding from the bottom wall and extending toward the receiving cavity, the control member having a limiting hole extending through the control member along the thickness direction, and at least a portion of the first limiting post being located in the limiting hole; The motor includes a main body, electrical connection terminals, and an output shaft. The control component includes a first control terminal. The drive device also includes a conductive component, at least a portion of which is located in the receiving cavity. The electrical connection terminal is electrically connected to the first control terminal through the conductive component. The first limiting post includes a first part and a second part connected to each other. The first part is located between the second part and the bottom wall. The orthographic projection of the second part on the bottom wall forms a first projection, and the orthographic projection of the first part on the bottom wall forms a second projection. At least a portion of the first projection is located outside the outer contour of the second projection. The first part is located within the limiting hole. The second part includes a positioning surface that contacts and is fixedly connected to the surface of the control member opposite to the bottom wall. The housing assembly further includes lead pins, each lead pin comprising a first segment and a second segment connected to each other. The first segment is embedded in the bottom wall, and the second segment is located within the receiving cavity. The control component further includes a circuit board and a second control terminal, the second control terminal being electrically connected to the lead pins. The distance between the surface of the circuit board facing away from the bottom wall and the surface of the lead pin facing away from the bottom wall is within a preset range.

2. The drive apparatus according to claim 1, characterized by The distance d between the surface of the circuit board facing away from the bottom wall and the surface of the lead pin facing away from the bottom wall is defined as follows. The second control terminal is welded and fixed to the lead pin, with a diameter of 1.4mm ≤ d ≤ 2mm; Alternatively, the second control terminal can be engaged with the lead pin, where 2.5mm ≤ d ≤ 3mm.

3. The driving device according to claim 1, characterized in that, The housing assembly also includes a second limiting post. The first limiting post is positioned closer to the second control terminal than the second limiting post. The second limiting post includes a third part located at the end of the second limiting post away from the bottom wall. The orthographic projection of the third part on the bottom wall is located inside the orthographic projection of the limiting hole on the bottom wall. The surface of the second limiting post facing away from the bottom wall is higher than the surface of the circuit board facing away from the bottom wall, or the surface of the second limiting post facing away from the bottom wall is flush with the surface of the circuit board facing away from the bottom wall.

4. The driving device according to claim 2, characterized in that, The housing assembly also includes a second limiting post. The first limiting post is positioned closer to the second control terminal than the second limiting post. The second limiting post includes a third part located at the end of the second limiting post away from the bottom wall. The orthographic projection of the third part on the bottom wall is located inside the orthographic projection of the limiting hole on the bottom wall. The surface of the second limiting post facing away from the bottom wall is higher than the surface of the circuit board facing away from the bottom wall, or the surface of the second limiting post facing away from the bottom wall is flush with the surface of the circuit board facing away from the bottom wall.

5. The driving device according to claim 1, characterized in that, The housing assembly includes three first limiting posts, and the line connecting the centers of the orthographic projections of the three first limiting posts on the bottom wall forms a triangle.

6. The driving device according to claim 2, characterized in that, The housing assembly includes three first limiting posts, and the line connecting the centers of the orthographic projections of the three first limiting posts on the bottom wall forms a triangle.

7. The driving device according to any one of claims 1 to 6, characterized in that, The first limiting post is integrally injection molded with the shell. The first limiting post and the control component are fixedly connected by a hot riveting process.

8. The driving device according to any one of claims 1 to 6, characterized in that, The surface of the circuit board facing away from the bottom wall is parallel to the inner surface of the bottom wall. The driving device includes at least two lead pins, and the second control terminal of the control component includes a through hole. Each lead pin is sleeved in the through hole and welded to the second control terminal. The surface of each lead pin facing away from the bottom wall protrudes from the surface of the control component facing away from the bottom wall, or the surface of each lead pin facing away from the bottom wall is flush with the surface of the control component facing away from the bottom wall.

9. A method for manufacturing a drive device, characterized in that, include: The system provides a control component, a housing assembly, and a motor. The control component includes a circuit board, a first control terminal, and a second control terminal, which are electrically connected to a circuit on the circuit board. The control component has a limiting hole that penetrates the control component along its thickness direction. The housing assembly includes a housing, at least two positioning posts, and lead pins. The positioning posts and lead pins are fixedly connected to the housing. The housing includes a bottom wall and a receiving cavity. The positioning posts protrude from the bottom wall and extend toward the receiving cavity. The lead pins include a first segment and a second segment connected to each other. The first segment is embedded in the bottom wall, and the second segment is located within the receiving cavity. The motor includes electrical connection terminals. The control component is placed inside the receiving cavity and the limiting hole is fitted onto the outer periphery of the positioning post; At least one of the positioning posts is heated away from the bottom wall using a hot riveting process, so that the end is laid flat along the surface of the circuit board away from the bottom wall to form a first limiting post and the first limiting post is in contact with and fixedly connected to the surface of the circuit board away from the bottom wall. The first limiting post ensures that the distance between the surface of the circuit board away from the bottom wall and the second section of the surface away from the bottom wall is within a preset range. The motor is positioned within the receiving cavity such that the electrical connection terminal is located at the end of the motor furthest from the control element.

10. The method for manufacturing the drive device according to claim 9, characterized in that, After the step of heating the end of at least one of the positioning posts away from the bottom wall using a hot riveting process, the method of manufacturing the drive device further includes: The second control terminal of the control component is soldered or snapped to the second section of the lead pin so that the second control terminal is electrically connected to the lead pin.

11. The method for manufacturing the drive device according to claim 9, characterized in that, The number of positioning posts is three, and the line connecting the centers of the orthographic projections of the three positioning posts on the bottom wall forms a triangle. The step of heating the end of at least one of the positioning posts away from the bottom wall using a hot riveting process includes: The ends of one or both positioning posts away from the bottom wall are heated using a hot riveting process. Alternatively, a hot riveting process can be used to heat the ends of the three positioning posts that are away from the bottom wall.

12. A method for manufacturing a drive device according to any one of claims 9 to 11, characterized in that, The motor includes electrical connection terminals, and the drive device further includes a conductive element, which comprises a first conductive portion and a second conductive portion electrically connected to each other. The conductive element is a flexible wire. Before placing the control component into the receiving cavity and fitting the limiting hole onto the outer periphery of the positioning post, the manufacturing method of the driving device includes: The first control terminal of the control element is soldered to the first conductive part of the conductive element so that the first control terminal and the first conductive part are electrically connected. The electrical connection terminals of the motor are soldered to the second conductive part of the conductive component to make the electrical connection terminals electrically connected to the second conductive part.

13. A method for manufacturing a drive device according to any one of claims 9 to 11, characterized in that, The motor includes electrical connection terminals, and the drive device further includes a conductive element. The conductive element includes a first conductive portion and a second conductive portion that are electrically connected to each other. The first conductive portion is a rigid conductive portion. The conductive element also includes a wiring portion connecting the first conductive portion and the second conductive portion. The wiring portion is embedded in the bottom wall, and at least a portion of the first conductive portion is located in the receiving cavity. The step of placing the control element in the receiving cavity and fitting the limiting hole onto the outer periphery of the positioning post includes: Place the control component into the receiving cavity; The limiting hole is fitted onto the outer periphery of the positioning post; The first control terminal of the control element is engaged with the first conductive part to make the control element electrically connected to the first conductive part.

14. A method for manufacturing a drive device according to any one of claims 9 to 11, characterized in that, The motor includes electrical connection terminals, and the drive device further includes a conductive element. The conductive element includes a first conductive portion and a second conductive portion that are electrically connected to each other. The second conductive portion is a rigid conductive portion. The conductive element also includes a wiring portion connecting the first conductive portion and the second conductive portion. The wiring portion is embedded in the bottom wall, and at least a portion of the second conductive portion is located in the receiving cavity. The step of placing the motor within the receiving cavity includes: The motor is placed inside the receiving cavity and the electrical connection terminal is engaged with the second conductive part to make the electrical connection terminal electrically connected to the second conductive part.

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