Valve device, actuator and electric motor

Abstract

A valve device, an actuator and an electric motor. The electric motor comprises a rotor assembly, a stator assembly and a rotating shaft, wherein the rotating shaft is fixedly arranged with the rotor assembly; the rotor assembly is provided with an accommodating cavity; at least part of the stator assembly is located in the accommodating cavity; the stator assembly comprises a stator core and a bearing; the electric motor is formed by integrally injection-molding at least the stator core and the bearing; part of the rotating shaft is located on the inner side of the bearing; the rotating shaft and the bearing are arranged in a limited manner and the rotating shaft can rotate; and projection is performed in the axial direction of the stator assembly, such that the projection of the inner wall of the bearing is located on the inner side of the projection of the stator core. By means of injection molding of the stator core and the bearing, the coaxiality between the stator assembly and the bearing can be improved, thereby helping to improve the operational stability of the electric motor when the rotating shaft rotates in the bearing.

Description

Valve assembly, actuator and motor

[0001] This application claims priority to Chinese Patent Application No. 202411812948.7, filed on December 10, 2024, entitled "Valve Device, Actuator and Motor", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of refrigeration technology, specifically to a valve device, actuator, and motor for vehicles or energy storage. Background Technology

[0003] Compared with internal rotor motors, external rotor motors have advantages such as high output torque and high power. In current external rotor motors, the bearings and stators are mostly fixed in relative position by press fitting. During long-term use, the stator and bearings may loosen, resulting in poor concentricity of the stator assembly and rotor assembly, which affects the working performance of the external rotor motor. Summary of the Invention

[0004] The purpose of this application is to provide a valve device, actuator, and motor that improves the motor's performance by increasing the concentricity between the stator assembly and the rotor.

[0005] To achieve the above objectives, this application adopts the following technical solution: an actuator, including a motor, the actuator having a receiving cavity, the motor located in the receiving cavity, the motor including a rotor assembly, a stator assembly and a rotating shaft, the rotating shaft being fixedly disposed with the rotor assembly, the rotor assembly having a receiving cavity, at least a portion of the stator assembly being located within the receiving cavity, the stator assembly including a stator core and a bearing, the stator core and the bearing being an integral injection-molded structure, a portion of the rotating shaft being located radially inner to the bearing, the rotating shaft being limited and positioned with the bearing and the rotating shaft being rotatable; projecting onto the axial direction of the stator assembly, the projection of the inner wall of the bearing is located inside the projection of the stator core.

[0006] According to the actuator provided in this application, by setting the projection of the bearing inner wall onto the axial direction of the stator assembly, the projection of the bearing inner wall is located inside the projection of the stator core. Furthermore, by setting the stator core and bearing as an integral injection-molded structure, the secondary assembly process of the stator core and bearing can be eliminated, which facilitates the reduction of assembly error accumulation between the stator core and bearing and improves the coaxiality of the stator assembly and bearing. As a result, when the shaft rotates inside the bearing, it is beneficial to improve the smooth operation performance of the actuator.

[0007] To achieve the above objectives, this application also provides a valve device, including the aforementioned actuator, valve body, and valve core. The valve body has an installation cavity, and the valve core is disposed within the installation cavity. The valve core has a spindle, and the actuator is connected to the spindle to drive the valve core to rotate within the installation cavity. By integrating the stator core and bearing into a single injection-molded structure, the secondary assembly process of the stator core and bearing can be eliminated, which facilitates the reduction of assembly errors between the stator core and bearing, improves the coaxiality of the stator assembly and bearing, and thus enhances the smooth operation performance of the valve device when the shaft rotates within the bearing.

[0008] To achieve the above objectives, this application also provides a motor, including a rotor assembly, a stator assembly, and a shaft. The shaft is fixedly disposed with the rotor assembly, and the rotor assembly is located on the outer periphery of the stator assembly. The stator assembly includes a stator core and a bearing. The stator core and the bearing are integrally injection-molded. Part of the shaft is located inside the bearing. The shaft and the bearing are mutually restrained, and the shaft is rotatable. Projecting onto the axial direction of the stator assembly, the projection of the inner wall of the bearing is located inside the projection of the stator core. By making the stator core and the bearing an integrally injection-molded structure, the secondary assembly process of the stator core and the bearing can be eliminated, which helps to reduce the accumulation of assembly errors of the stator core and the bearing, and can improve the coaxiality of the stator assembly and the bearing. Therefore, when the shaft rotates within the bearing, it helps to improve the smooth operation performance of the motor. Attached Figure Description

[0009] Figure 1 is a schematic diagram of the structure of an electric motor provided in an embodiment of this application;

[0010] Figure 2 is a partial structural diagram of Figure 1;

[0011] Figure 3 is a cross-sectional view of Figure 2;

[0012] Figure 4 is a schematic diagram of the stator assembly in Figure 1;

[0013] Figure 5 is a cross-sectional view of Figure 4;

[0014] Figure 6 is a schematic diagram of an actuator provided in an embodiment of this application;

[0015] Figure 7 is a schematic diagram of the assembly of the mounting plate and the motor in Figure 6;

[0016] Figure 8 is a cross-sectional view of Figure 7;

[0017] Figure 9 is a schematic diagram of the mounting plate in Figure 6;

[0018] Figure 10 is a partial structural schematic diagram of Figure 6;

[0019] Figure 11 is a cross-sectional view of Figure 10 along the AA direction;

[0020] Figure 12 is a structural schematic diagram of the motor, mounting plate, and circuit board in Figure 6;

[0021] Figure 13 is an exploded view of the motor, mounting plate, and circuit board in Figure 6;

[0022] Figure 14 is an assembly diagram of the motor, mounting plate, and circuit board in Figure 6;

[0023] Figure 15 is an assembly diagram of the motor, mounting plate, and circuit board in an actuator provided in another embodiment of this application;

[0024] Figure 16 is a schematic diagram of the explosion in Figure 15;

[0025] Figure 17 is a schematic diagram of the assembly of the mounting plate and the motor in Figure 15;

[0026] Figure 18 is a cross-sectional view of Figure 15;

[0027] Figure 19 is a schematic diagram of the connector in Figure 15.

[0028] The reference numerals in the figures are explained as follows: 1. Motor; 10. Rotor assembly; 100. Receiving cavity; 101. Outer shell; 102. Magnet; 103. Positioning part; 104. Winding; 105. Receiving cavity; 106. Transmission cavity; 11. Shaft; 12. Stator assembly; 121. Stator core; 122. Plastic coating layer; 1220. Mounting post; 1221. Fixing hole; 123. Bearing; 124. Mounting plate; 1240. Clearance hole; 1241. First mounting hole; 1242, Second mounting hole; 1243, Flanged part; 1245, Flat plate part; 125, Circuit board; 1250, Bearing clearance hole; 1251, Opening; 1252, Welding slot; 1253, Winding clearance hole; 126, Connector; 1261, Winding part; 1262, Insertion part; 1263, Connection part; 14, Fixing part; 2, Gear; 3, Transmission assembly; 31, Transmission shaft; 5, Housing; 50, Stator fixing part. Detailed Implementation

[0029] As can be seen from the background technology, the performance of existing motors needs to be improved.

[0030] To address the aforementioned problems, this application provides a motor. To make the objectives, technical solutions, and advantages of this application clearer, the embodiments are further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0031] Referring to Figures 1 and 2, this application provides an electric motor, which includes a rotor assembly 10, a stator assembly 12, and a shaft 11. The shaft 11 is fixedly disposed with the rotor assembly 10. The rotor assembly 10 has a receiving cavity 105, and at least a portion of the stator assembly 12 is located within the receiving cavity 105. The stator assembly 12 includes a stator core 121 and a bearing 123. The stator core 121 and the bearing 123 in the motor are integrally injection molded, that is, the stator core 121 and the bearing 123 are an integral injection molded structure. A portion of the shaft 11 is located radially inside the bearing 123, and the shaft 11 and the bearing 123 are mutually positioned and the shaft 11 is rotatable. Projected axially onto the stator assembly 12, the projection of the inner wall of the bearing 123 is located inside the projection of the stator core 121.

[0032] In this embodiment, the stator core 121 is a laminated assembly, and the bearing 123 and the laminated assembly are directly coated together with plastic material, forming a plastic coating layer 122. The laminated assembly is stamped from silicon steel sheets and consists of a yoke, yoke slots, and yoke teeth. The surface of the yoke teeth is covered with plastic material or coated with paint. The windings are wound in the yoke tooth winding slots. Different pole slots have different stator structures, which can be set according to actual product requirements. This application does not limit the stator structure.

[0033] Referring to Figures 1 to 3, the rotor assembly 10 is positioned on the outer periphery of the stator assembly 12. The rotor assembly 10 includes a housing 101 and a magnetic part 102 located within the housing 101, with the magnetic part 102 fixed to the inner wall of the housing 101. The magnetic part 102 can be an inner ring multi-pole magnetized ring structure or a magnetic tile structure. The rotating shaft 11 is coaxially arranged with the inner ring of the magnetic part 102.

[0034] The fact that the shaft 11 can rotate means that when the motor is working, the shaft 11 can rotate around the bearing 123.

[0035] The rotating shaft 11 is fixedly connected to or integrated with the housing 101. In one specific embodiment, the housing 101 includes a positioning part 103, to which the rotating shaft 11 is fixed. Especially when the housing 101 is a stamped part, the end face of the housing 101 is recessed inward to form the positioning part 103, which can increase the contact area between the positioning part 103 and the rotating shaft 11 and improve the connection between the rotating shaft 11 and the housing 101.

[0036] In another specific embodiment, to further improve the coaxiality of the stator assembly 12 and the rotor assembly 10, the rotating shaft 11 is integrally formed with the rotor assembly 10. Of course, in other embodiments, the rotating shaft 11 can also be fixed to the rotor assembly 10 by other methods such as interference fitting, riveting, welding, bonding, or snap-fitting. Of course, in another embodiment, the outer shell 101 can also be a machined part, with its bottom wall having a certain thickness to satisfy interference fitting with the rotating shaft 11. Of course, in other embodiments, the rotating shaft 11 and the outer shell 101 can also be integrally formed; for example, the outer shell 101 is a plastic part, and the rotating shaft 11 and the outer shell 101 are integrally injection molded.

[0037] Referring to Figures 4 and 5, along the axial direction of the motor, the bearing 123 protrudes from the stator core 121 to facilitate subsequent fixed connection between the bearing 123 and the mounting plate 124. To reduce the amount of wobble when the shaft 11 rotates, the bearing 123 extends from the first axial end to the second axial end along the stator core 121.

[0038] In one embodiment, the bearing 123 can extend from a first axial end to a second axial end along the stator core 121. This gives the bearing 123 a longer guide length, reducing the amount of wobble during the operation of the shaft 11. In another embodiment, the bearing 123 can also be partially located within the stator core 121. Of course, to meet the requirements of injection molding and concentricity accuracy, the number of bearings 123 can be at least two, with at least two bearings 123 spaced apart along the axial direction of the stator assembly. Specifically, there can be two bearings, each distributed at one axial end of the stator assembly 12, to support both axial ends of the shaft.

[0039] In one specific embodiment, to improve the rotational smoothness of the shaft 11, the bearing 123 extends from the first axial end to the second axial end of the stator core 121. Thus, both axial ends of the shaft 11 are supported by the bearing 123. During rotation, the bearing 123 provides radial positioning for the shaft 11, reducing its wobble and thereby improving the coaxiality of the stator assembly 12 and the rotor assembly 10, thus enhancing the motor's performance.

[0040] Of course, in other embodiments, the bearing 123 may also be partially located on the inner wall of the plastic coating layer 122, that is, the bearing 123 extends from the first end to the second end along the axial direction of the stator core 121. Also, the bearing 123 may protrude from the plastic coating layer 122, so that it can be fixed to the mounting plate during subsequent installation, further improving the installation stability of the stator assembly.

[0041] To increase the contact area between the plastic coating layer 122 and the bearing 123, and to reduce or prevent radial angular deflection between the bearing 123 and the stator core 121, thereby improving the stability of the shaft 11 during rotation, an anti-rotation groove can be formed on the outer ring of the bearing 123. This anti-rotation groove can be a recessed structure extending from the outer ring of the bearing 123 into the interior of the bearing 123. A portion of the plastic coating layer 122 is embedded within the anti-rotation groove, and the plastic coating layer 122 and the groove wall are integrally injection molded. This increases the contact area between the plastic coating layer 122 and the bearing 123, thereby enhancing the connection strength between them.

[0042] Along the axial direction of bearing 123, the inner diameter of at least one end of bearing 123 is smaller than the inner diameter of the middle section of bearing 123, forming a gap between the middle section of bearing 123 and shaft 11, which can reduce friction between bearing 123 and shaft 11. Optionally, both ends of bearing 123 have a reduced diameter design to ensure that the contact area between bearing 123 and shaft 11 is not too large while shaft 11 rotates. Bearing 123 can be a powder metallurgy bearing, and lubricating oil can be added to the bearing for lubrication; bearing 123 can also be a self-lubricating bearing.

[0043] The motor provided in this application eliminates the need for secondary assembly of the stator core and bearings by injection molding the stator core and bearings, reducing the accumulation of assembly errors and improving the coaxiality of the stator assembly and bearings. This, in turn, helps to improve the concentricity of the stator assembly and rotor assembly. Furthermore, the overall layout of the external rotor brushless motor is superior, resulting in better motor performance and greater output power.

[0044] Referring to Figure 1 and Figure 6, to solve the above problems, this application also provides an actuator, including a motor 1. The actuator has a receiving cavity 100, and the motor 1 is located in the receiving cavity 100. The motor 1 includes a rotor assembly 10, a stator assembly 12, and a rotating shaft 11. The rotating shaft 11 is fixedly disposed with the rotor assembly 10. The rotor assembly 10 has a receiving cavity 105, and at least a portion of the stator assembly 12 is located within the receiving cavity 105. The stator assembly 12 includes a stator core 121 and a bearing 123. The motor 1 is injection molded at least with the stator core 121 and the bearing 123. A portion of the rotating shaft 11 is located inside the bearing 123. The rotating shaft 11 and the bearing 123 are mutually limited and the rotating shaft 11 is rotatable. In the axial projection direction of the stator assembly 12, the projection of the inner wall of the bearing 123 is located inside the projection of the stator core 121.

[0045] The stator core 121 is a laminated assembly. A plastic coating material directly coats the bearing 123 and the laminated assembly together, forming a plastic coating layer 122. The laminated assembly is stamped from silicon steel sheets and consists of a yoke, yoke slots, and yoke teeth. The surface of the yoke teeth is covered with plastic material or coated with paint. The winding 104 is wound in the yoke tooth winding slots. Different pole slots can be matched, resulting in different stator structures. The specific structure can be set according to actual product requirements; this application does not limit the stator structure.

[0046] Referring to Figures 1, 2, and 3, the rotor assembly 10 is positioned around the outer ring of the stator assembly 12. The rotor assembly 10 includes a housing 101 and a magnetic section 102 located within the housing 101, with the magnetic section 102 fixed to the inner wall of the housing 101. The magnetic section 102 can be an inner ring multi-pole magnetized ring structure or a magnetic tile structure. The rotating shaft 11 is coaxially arranged with the inner ring of the magnetic section 102.

[0047] The ability of the shaft to rotate means that when the motor is working, the shaft 11 can rotate around the bearing 123.

[0048] The rotating shaft 11 is fixedly connected to or integrated with the housing 101. In one specific embodiment, the housing 101 includes a positioning part 103, to which the rotating shaft 11 is fixed. Especially when the housing 101 is a stamped part, the end face of the housing 101 is recessed inward to form the positioning part 103, which can increase the contact area between the positioning part 103 and the rotating shaft 11 and improve the connection strength between the rotating shaft 11 and the housing 101. In one specific embodiment, in order to further improve the coaxiality of the stator assembly 12 and the rotor assembly 10, the rotating shaft 11 is integrally formed with the rotor assembly 10. Of course, in other embodiments, the rotating shaft 11 can also be fixed to the rotor assembly 10 by other means such as interference fit, riveting, welding, bonding, snap-fit, etc. Of course, in another embodiment, the housing 101 can also be a machined part, and the bottom wall of the housing 101 has a certain thickness to meet the interference fit riveting between it and the rotating shaft 11. Of course, in other embodiments, the shaft 11 and the housing 101 can also be integrally molded. For example, the housing 101 is a plastic part, and the shaft 11 and the housing 101 are integrally injection molded.

[0049] Referring to Figures 4 and 5, along the axial direction of the motor, the bearing 123 protrudes from the stator core 121 to facilitate subsequent fixed connection with the mounting plate. To reduce the amount of wobble during the rotation of the shaft 11, the bearing 123 extends from the first axial end A to the second axial end B of the stator core 121. In one specific embodiment, the bearing 123 can extend from the first axial end A to the second axial end B of the stator core 121. Thus, the bearing 123 has a longer guide length, which can reduce the amount of wobble during the operation of the shaft 11. In another embodiment, the bearing can also be partially located within the stator core. Of course, provided that the injection molding and concentricity accuracy requirements are met, the number of bearings can also be two, with the two bearings respectively distributed at both axial ends of the stator assembly to support both axial ends of the shaft.

[0050] In one specific embodiment, to improve the rotational smoothness of the shaft 11, the bearing 123 extends from the first axial end to the second axial end of the stator core 121. Thus, both axial ends of the shaft 11 are supported by the bearing 123. During rotation, the bearing 123 provides radial positioning for the shaft 11, reducing its wobble and improving the coaxiality of the stator assembly 12 and the rotor assembly 10, thereby enhancing motor performance. In other embodiments, the bearing 123 may be partially located on the inner wall of the plastic coating layer 122, extending from the first axial end to the second axial end of the stator core 121. Alternatively, the bearing 123 may protrude from the plastic coating layer 122, allowing it to be fixed to the mounting plate during subsequent installation, further improving the stability of the stator assembly installation.

[0051] To increase the contact area between the plastic coating and the bearing, and to prevent radial angular deflection between the bearing and the stator core 121, thereby improving the smoothness of the shaft rotation, an anti-rotation groove can be formed on the outer ring of the bearing 123. Along the axial direction of the bearing 123, the inner diameter at at least one end of the bearing 123 is smaller than the inner diameter of the middle section of the bearing 123, creating a gap between the middle section of the bearing and the shaft, which reduces friction between the bearing and the shaft. Optionally, both ends of the bearing 123 have a reduced diameter design to ensure that the contact area between the bearing 123 and the shaft 11 is not excessive while the shaft 11 rotates. The bearing can be a powder metallurgy bearing, and lubricating oil can be added for lubrication; the bearing can also be a self-lubricating bearing.

[0052] The actuator provided in this application, by injection molding the stator core and bearings, improves the coaxiality of the stator assembly and bearings, thereby enhancing the smooth operation of the actuator when the shaft rotates within the bearings. For details regarding the motor, please refer to the preceding text; further explanation is omitted here.

[0053] Referring to Figures 7 and 8, to facilitate the fixing of the stator assembly 12, the actuator also includes a mounting plate 124. Along the axial direction of the motor 1, the mounting plate 124 is located at the end away from the stator core 121. Along the axial direction of the stator assembly, a bearing 123 protrudes from the stator core 121 and from the plastic coating layer 122. The bearing 123 is fixedly connected to the mounting plate 124. Of course, the actuator may also include a housing 5. The motor 1 is fixedly connected to the housing 5 via the mounting plate 124. The housing 5 defines a portion of the wall of the receiving cavity 100.

[0054] Referring to Figures 7-8 and 9, in one specific embodiment, to facilitate the fixed connection between the bearing 123 and the mounting plate 124 and increase the connection strength between the stator assembly 12 and the mounting plate 124, the bearing 123 and the mounting plate 124 are fixedly connected as follows: the mounting plate 124 includes a flat plate portion 1245 and a flange portion 1243. The flat plate portion 1245 protrudes from the outer periphery of the flange portion 1243. Along the axial direction of the flat plate portion 1245, the flange portion 1243 extends towards the stator core 121. The flange portion 1243 has a first mounting hole 1241, and the hole wall of the first mounting hole 1241 is fixedly connected to the outer wall of the bearing 123. Of course, in other embodiments, the bearing and the mounting plate can also be fixed together by welding, bonding, or other methods.

[0055] Of course, referring to Figures 6 and 10-11, the housing 5 includes a stator fixing part 50, which is fixedly connected to the mounting plate 124. Thus, the mounting plate 124 can be used to fix the motor 1 to the actuator housing 5. Specifically, the stator fixing part 50 includes a hollow column formed on the housing, and the mounting plate 124 has a mounting hole 1244 (shown in Figure 9) aligning with the hollow column. Screws or bolts are used to pass through both the mounting hole 1244 and the hollow column, achieving a fixed connection between the mounting plate 124 and the housing 5. Of course, in other embodiments, the stator fixing part may also include a hot-riveting column, which is hot-riveted to the mounting hole of the mounting plate to achieve a fixed connection between the mounting plate and the housing. Alternatively, the mounting plate may have columnar protrusions, and the housing may have connecting holes; the columnar protrusions and connecting holes can be used to achieve a fixed connection between the mounting plate and the housing. In other embodiments, the method of fixing the mounting plate and the housing is not limited, as long as it can fix the stator assembly to the housing. The motor mounting position on the housing can also be fixed with a bearing, which can be a plastic-coated metal bearing. The shaft can be radially limited with the plastic-coated metal bearing on the housing to prevent positioning failure caused by motor shaking. The plastic-coated metal bearing can also be replaced with wear-resistant plastic material.

[0056] Referring again to Figure 8, to improve the connection strength between the stator assembly 12 and the mounting plate 124, in one specific embodiment, the stator assembly 12 further includes a plastic coating layer 122. Along the radial direction of the stator assembly 12, the plastic coating layer 122 is located between the stator core 121 and the bearing 123, and the plastic coating layer 122 coats at least a portion of the axial end face of the stator core 121. Optionally, the plastic coating layer 122 coats the portion of the axial end face of the stator core 121 located radially inward. The plastic coating layer 122 and the mounting plate 124 are fixedly connected. The plastic coating layer 122 is formed from the injection molding material used when the stator core 121 and the bearing 123 are integrally injection molded. The axes of the plastic coating layer 122, the stator core 121, and the bearing 123 coincide to improve the coaxiality of the stator assembly 12 and the shaft 11.

[0057] The fixing method between the plastic coating layer 122 and the mounting plate 124 is not limited. As shown in Figure 12, in one specific embodiment, to facilitate the fixed connection between the mounting plate 124 and the plastic coating layer 122, the mounting plate 124 has a second mounting hole 1242, and the plastic coating layer 122 has a fixing hole 1221. Along the axial direction of the stator assembly 12, the projection of the hole wall of the second mounting hole 1242 and the projection of the hole wall of the fixing hole 1221 are coaxial. Specifically, the projection of the hole wall of the second mounting hole 1242 and the projection of the hole wall of the fixing hole 1221 can coincide. The motor 1 also includes a fixing member 14, which is located in the second mounting hole 1242 and the fixing hole 1221. The fixing member 14 can be a bolt or a screw. Of course, the plastic coating layer 122 can also include a mounting post 1220, which is hot-riveted to the second mounting hole 1242 to achieve a fixed connection between the mounting plate 124 and the stator assembly 12. Alternatively, the mounting post 1220 can be installed only in the second mounting hole 1242 to achieve a positioning function between the mounting plate 124 and the mounting post 1220. Of course, in other embodiments, the plastic coating layer and the mounting plate can also be fixedly connected by adhesive.

[0058] It can be seen that riveting the mounting plate and bearing together, and fixing the plastic coating to the mounting plate, further improves the connection between the stator assembly and the mounting plate. After fixing the mounting plate to the actuator housing, it will be easier to pass performance tests such as vehicle testing, and further improve the overall performance of the actuator.

[0059] Referring to Figure 13, the actuator also includes a circuit board 125, which is located axially between the stator core 121 and the mounting plate 124 of the stator assembly 12. The stator assembly 12 and the circuit board 125 are electrically connected. The circuit board 125 has a bearing clearance hole 1250, the diameter of which is greater than or equal to the outer diameter of the bearing 123. Thus, the stator assembly and the circuit board can be simultaneously fixed together and mounted onto the housing using a single mounting plate, simplifying the assembly process. The mounting plate 124 avoids the solder joints of the circuit board 125 to prevent short circuits caused by contact between the mounting plate and the circuit board solder joints if the mounting plate is made of metal. Alternatively, in other embodiments, the circuit board may be fixed to the other side of the mounting plate axially along the stator assembly.

[0060] In summary, to ensure the secure connection between the various components of the motor, a circuit board 125 is mounted on the upper end of the motor, the terminals are soldered, and then the bearing 123 is riveted to the mounting plate 124 and fixed with hot riveting posts. At the same time, the plastic coating layer 122 has reserved screw fixing positions, and screws are used for reinforcement, making the fixation more reliable. The mounting plate 124 is cut out to avoid the terminal positions to prevent short circuits.

[0061] Referring to Figure 13 and then to Figure 14, to improve the winding method and increase welding strength, in one specific embodiment, the electrical connection between the circuit board and the stator assembly is as follows: The circuit board 125 has a welding slot 1252 with an opening 1251 that extends through the upper and lower surfaces of the circuit board 125. The welding slot 1252 surrounds the pads of the circuit board 125, and the free end of the winding 104 is located in the welding slot 1252 and electrically connected to the pads. The shape of the welding slot is not limited, as long as it allows the winding leads to be guided into the circuit board.

[0062] The free end lead of the outer rotor winding 104 is guided through the opening 1251 of the circuit board 125 to the other side of the circuit board 125, and then guided to the solder pad position for soldering through the soldering slot 1252 on the circuit board. There are solder pads on both sides of the circuit board 125, and the sides of the interconnected circuit boards are copper-plated. During the soldering process, solder can flow into the slot of the circuit board 125 through the copper plating on the arc-shaped side, ensuring soldering strength and stability. It can be seen that by adding soldering slots to the circuit board, the lead end can be avoided from being soldered to the front of the circuit board, making the soldering method of the outer rotor motor more reasonable and suitable for automated soldering. Of course, in other embodiments, the winding 104 can also be directly soldered to the solder pads of the circuit board 125, and the coil can be energized by the software control of the circuit board 125 to generate a regular magnetic field, thereby causing the rotor to rotate and achieving the effect of output torque.

[0063] Please refer to Figure 6. The actuator also includes gear 2 and transmission assembly 3. Gear 2 is fixed to the rotating shaft 11, and gear 2 is connected to transmission assembly 3. Transmission assembly 3 can be a gear pair.

[0064] Furthermore, in this embodiment, the actuator also has a transmission cavity 106, with the gear 2 fixed to the rotating shaft 11 and the gear 2 being connected to the transmission assembly 3 in a transmission manner; along the axial direction of the motor 1, the wall portion defining the receiving cavity 100 and the wall portion defining the transmission cavity 106 are located at different heights in the housing 5, and the axes of the rotating shaft 11 and the transmission shaft 31 of the transmission assembly 3 are parallel. This arrangement helps to reduce the space occupied by the actuator.

[0065] Please refer to Figures 15-19, which show another embodiment of the actuator provided in this application. The difference between this embodiment and the previous embodiment lies in the manner in which the electrical connection between the circuit board and the stator assembly is different.

[0066] As shown in Figures 15-18, to improve welding reliability, the motor 1 also includes a winding 104 and a connector 126. The winding 104 is wound around the stator core 121, and the connector 126 is integrally injection molded or fixedly connected to the stator assembly 12. The stator assembly 12 and the circuit board 125 are electrically connected through the connector 126. The connector 126 includes a winding portion 1261 and a plug portion 1262. Along the axial direction of the stator core 121, at least a portion of the plug portion 1262 and at least a portion of the winding portion 1261 protrude from the stator core 121. The free end of the winding 104 is wound around the winding portion 1261. The winding portion 1261 and the plug portion 1262 are directly or indirectly connected, and the plug portion 1262 is electrically connected to the circuit board 125. The mounting plate 124 has a clearance hole 1240, which avoids the connector 126. The circuit board 125 has a winding clearance hole 1253, which avoids the winding portion 1261. The free end of the winding wound around the stator core 121 is then wound around the winding portion 1261. Electrical connection between the connector 126 and the circuit board 125 is achieved by soldering the plug-in portion 1262 to the circuit board 125. This avoids the risks of poor soldering and wire breakage that can easily occur when directly soldering the enameled wire to the circuit board 125, thus improving soldering reliability. The winding portion 1261 and the plug-in portion 1262 can be straight, curved, or wave-shaped.

[0067] Referring to Figure 19 and referring to Figure 16, in one specific embodiment, the winding portion 1261 and the insertion portion 1262 are indirectly connected. Specifically, the connector 126 further includes a connecting portion 1263, which connects the winding portion 1261 and the insertion portion 1262 respectively. The winding portion 1261 and the insertion portion 1262 form an angle with the connecting portion 1263, and along the axial direction of the stator core 121, both the winding portion 1261 and the insertion portion 1262 extend in a direction away from the connecting portion 1263. In this way, the winding portion can be positioned to avoid interference with the circuit board 125, and the welding strength can be improved by soldering it to the circuit board through the insertion portion. Furthermore, by increasing the contact area between the connector 126 and the stator assembly, the injection molding strength between the connector 126 and the stator assembly can also be improved. Plastic-coated connectors are wrapped on the top of the stator core 121. These connectors are used to automatically wind the single-phase windings with the connectors after winding, followed by automatic soldering of the terminals to the enameled wire. Winding, winding, and tinning can be automated. This eliminates the need for manual wire handling, winding, and soldering, thus avoiding the risk of complex wire handling and errors after stator core winding.

[0068] The connecting part 1263 can be straight, arc-shaped, or wave-shaped, as long as it serves to connect the winding part and the plug-in part. After the stator core is wound with the winding 104, the winding 104 is wound around the winding part 1261. Since the winding part 1261 and the plug-in part 1262 are connected, the coil and circuit board signal conduction can be achieved after the connector 126 is soldered to the circuit board 125. Of course, in other embodiments, the winding part and the plug-in part can also be directly connected. For example, the connector is in a straight line shape, with the axial end of the connector near the stator core used for winding and the axial end away from the stator core used for soldering to the circuit board.

[0069] In one specific embodiment, the connector is U-shaped overall, with the length of the winding portion 1261 being shorter than the length of the insertion portion 1262. Of course, in other embodiments, the lengths of the winding portion and the insertion portion are not limited. The winding portion of the connector cannot be too long, otherwise it may bend. Directly inserting the winding portion into the circuit board 125 for soldering means that the winding part will also be inserted, affecting soldering reliability. By designing the connector as a U-shaped pin structure, short pins are used for winding the wire, and the short pin positions on the circuit board 125 can be avoided, while long pins are used for soldering, improving the strength of the soldering. Plastic-coated U-shaped pins are placed on the top of the stator core 121 for automatically winding the single-phase windings with the connector after winding, followed by automatic soldering of the terminals to the enameled wire. Winding, winding, and tinning can be automated. This eliminates the need for manual wire handling, winding, and soldering, thus avoiding the risk of complex wire handling and errors after stator core winding.

[0070] The stator core 121 of the external rotor brushless motor is soldered to the circuit board 125 using connectors 126. This avoids the risks of poor soldering and wire breakage that can easily occur when directly soldering the enameled wire to the circuit board 125, thus improving soldering reliability. Furthermore, by adding connectors 126, the need to remove the surface enamel layer by tinning exposed wire ends can be avoided, as this process is complex and carries the risk of incomplete removal.

[0071] In one specific embodiment, as shown in FIG16, the plastic coating layer 122 includes an outer peripheral portion 1221 and an inner peripheral portion 1222. The connector 126 can be fixed to the inner peripheral portion 1222. In this way, when the connector is set in the outer peripheral portion, a larger winding amplitude is required when the winding is wound around the stator core, which can improve the winding effect.

[0072] For further details regarding the actuator, please refer to the previous embodiment; it will not be repeated here.

[0073] To address the aforementioned problems, this application also provides a valve device, including the aforementioned actuator, valve body, and valve core. The valve body has an installation cavity, and the valve core is disposed within the installation cavity. The valve core has a spindle, and the actuator is connected to the spindle to drive the valve core to rotate within the installation cavity. By injection molding the stator and bearings, the secondary assembly process of the stator core and bearings can be eliminated, reducing the accumulation of assembly errors between the stator core and bearings. This improves the coaxiality of the stator assembly and bearings, thereby enhancing the smooth operation of the valve device when the shaft rotates within the bearings.

[0074] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications without departing from the concept of this application, and these modifications all fall within the scope of protection of this application.

Claims

1. An actuator, characterized in that, The actuator includes a motor (1), the actuator having a receiving cavity (100), the motor (1) being located in the receiving cavity (100), the motor (1) including a rotor assembly (10), a stator assembly (12) and a rotating shaft (11), the rotating shaft (11) being fixedly disposed to the rotor assembly (10), the rotor assembly (10) having a receiving cavity (105), at least a portion of the stator assembly (12) being located within the receiving cavity (105), the stator assembly (12) including The stator core (121) and the bearing (123) are integrally injection molded structures. Part of the rotating shaft (11) is located on the radial inner side of the bearing (123). The rotating shaft (11) is limited to the bearing (123) and the rotating shaft (11) can rotate. The projection of the inner wall of the bearing (123) onto the axial direction of the stator assembly (12) is located on the inner side of the projection of the stator core (121).

2. The actuator as described in claim 1, characterized in that, It also includes a mounting plate (124) and a housing (5), the housing (5) defining a portion of the wall of the receiving cavity (100), the housing (5) being fixedly connected to the mounting plate (124) along the axial direction of the motor (1), the mounting plate (124) being located at one end away from the stator core (121), the bearing (123) protruding from the stator core (121), the bearing (123) being fixedly connected to the mounting plate (124).

3. The actuator as described in claim 2, characterized in that, The mounting plate (124) includes a flat plate portion (1245) and a flange portion (1243). The flat plate portion (1245) protrudes from the outer periphery of the flange portion (1243) along the axial direction of the flat plate portion (1245). The flange portion (1243) extends toward the stator core (121). The flange portion (1243) has a first mounting hole (1241). The hole wall forming the first mounting hole (1241) is fixedly connected to the outer wall of the bearing (123).

4. The actuator as described in claim 2 or 3, characterized in that, The stator assembly (12) further includes a plastic coating layer (122). Along the radial direction of the stator assembly (12), the plastic coating layer (122) is located between the stator core (121) and the bearing (123), and the plastic coating layer (122) coats at least a portion of the axial end face of the stator core (121). The plastic coating layer (122) and the mounting plate (124) are fixedly connected, and the axes of the plastic coating layer (122), the stator core (121), and the bearing (123) coincide. And / or, the bearing (123) has an anti-rotation groove, which is a groove structure extending from the outer ring of the bearing (123) into the interior of the bearing (123), and a portion of the plastic coating layer (122) is embedded in the anti-rotation groove.

5. The actuator as described in claim 4, characterized in that, The mounting plate (124) has a second mounting hole (1242), and the plastic coating layer (122) has a fixing hole (1221). Along the axial direction of the stator assembly (12), the projection of the hole wall of the second mounting hole (1242) and the projection of the hole wall of the fixing hole (1221) are coaxial. The motor (1) also includes a fixing member (14), which is located at the second mounting hole (1242) and the fixing hole (1221). The mounting plate (124) is connected to the plastic coating layer (122) through the fixing member (14).

6. The actuator as described in claim 2 or 3, characterized in that, It also includes a circuit board (125) which is fixed in the axial direction of the stator assembly (12) between the stator core (121) and the mounting plate (124). The stator assembly (12) and the circuit board (125) are electrically connected. The circuit board (125) has a bearing clearance hole (1250) with a diameter greater than or equal to the outer diameter of the bearing (123).

7. The actuator as claimed in claim 4, characterized in that, It also includes a circuit board (125) which is fixed in the axial direction of the stator assembly (12) between the stator core (121) and the mounting plate (124). The stator assembly (12) and the circuit board (125) are electrically connected. The circuit board (125) has a bearing clearance hole (1250) with a diameter greater than or equal to the outer diameter of the bearing (123).

8. The actuator as claimed in claim 6 or 7, characterized in that, The motor (1) also includes a winding (104) and a connector (126). The winding (104) is wound around the stator core (121), and the connector (126) is integrally injection molded or fixedly connected to the stator assembly (12). The stator assembly (12) and the circuit board (125) are electrically connected via the connector (126). The connector (126) includes a winding portion (1261) and a plug portion (1262). Along the axial direction of the stator core (121), at least a portion of the plug portion (1262) and at least a portion of the winding portion (1261) protrude from the stator core (121). The free end of the winding (104) is wound around the winding portion (1261). The winding portion (1261) and the plug portion (1262) are directly or indirectly connected. The plug portion (1262) is electrically connected to the circuit board (125). The mounting plate (124) has a clearance hole (1240) that avoids the connector (126), and the circuit board (125) has a winding clearance hole (1253) that avoids the winding portion (1261).

9. The actuator as claimed in claim 8, characterized in that, The connector (126) further includes a connecting part (1263), which connects the winding part (1261) and the plug-in part (1262) respectively. The winding part (1261) and the plug-in part (1262) form an angle with the connecting part (1263). Along the axial direction of the stator core (121), both the winding part (1261) and the plug-in part (1262) extend in a direction away from the connecting part (1263). And / or, the plastic coating layer (122) includes an outer peripheral portion (1221) and an inner peripheral portion (1222), and the connector (126) is fixed to the inner peripheral portion (1222).

10. The actuator as claimed in claim 6 or 7, characterized in that, The motor (1) also includes a winding (104), which is wound around the stator core (121), and the free end of the winding (104) is electrically connected to the circuit board (125). The circuit board (125) has a soldering slot (1252) with an opening (1251) that extends through the upper and lower surfaces of the circuit board (125). The soldering slot (1252) surrounds the pads of the circuit board (125). The free end of the winding (104) is located in the soldering slot (1252) and is electrically connected to the pads of the circuit board (125).

11. The actuator according to any one of claims 1-3, characterized in that, Along the axial direction of the motor (1), the bearing (123) protrudes from the stator core (121), and the bearing (123) extends from the first axial end (A) to the second axial end (B) of the stator core (121). The rotor assembly (10) includes a housing (101) and a magnetic part (102) located inside the housing (101). The magnetic part (102) is fixed to the inner wall of the housing (101). The rotating shaft (11) is fixedly connected to or integrated with the housing (101). Along the axial direction of the stator core (121), the rotating shaft (11) passes through the first axial end and the second axial end of the stator core (121) and protrudes from the bearing (123). The actuator also includes a gear (2) and a transmission assembly (3). The gear (2) is fixed to the rotating shaft (11) and is connected to the transmission assembly (3) in a transmission connection.

12. The actuator as claimed in claim 8, characterized in that, Along the axial direction of the motor (1), the bearing (123) protrudes from the stator core (121), and the bearing (123) extends from the first axial end (A) to the second axial end (B) of the stator core (121). The rotor assembly (10) includes a housing (101) and a magnetic part (102) located inside the housing (101). The magnetic part (102) is fixed to the inner wall of the housing (101). The rotating shaft (11) is fixedly connected to or integrated with the housing (101). Along the axial direction of the stator core (121), the rotating shaft (11) passes through the first axial end and the second axial end of the stator core (121) and protrudes from the bearing (123).

13. The actuator according to any one of claims 1-12, characterized in that, The actuator further includes a gear (2), a transmission assembly (3), and a transmission cavity (106). The gear (2) is fixed to the rotating shaft (11) and is connected to the transmission assembly (3) in a transmission manner. Along the axial direction of the motor (1), the wall of the receiving cavity (100) and the wall of the transmission cavity (106) are located at different heights in the housing (5). The axes of the rotating shaft (11) and the transmission shaft (31) of the transmission assembly (3) are parallel.

14. A valve device, characterized in that, It includes a valve core and an actuator as described in any one of claims 1-13, the actuator driving the valve core to rotate.

15. An electric motor, characterized in that, The device includes a rotor assembly (10), a stator assembly (12), and a rotating shaft (11). The rotating shaft (11) is fixedly disposed with the rotor assembly (10). The rotor assembly (10) has a receiving cavity (105). At least a portion of the stator assembly (12) is located within the receiving cavity (105). The stator assembly (12) includes a stator core (121) and a bearing (123). The stator core (121) and the bearing (123) are integrally injection molded. A portion of the rotating shaft (11) is located inside the bearing (123). The rotating shaft (11) and the bearing (123) are mutually restrictive and the rotating shaft (11) is rotatable. The projection of the inner wall of the bearing (123) onto the axial direction of the stator assembly (12) is located inside the projection of the stator core (121).

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