An electrically operated valve

Abstract

This application provides an electric valve, which includes a drive device. The drive device includes a housing and a top cover. The motor includes a rotor and a first rotating shaft. The rotor and the first rotating shaft are fixedly connected or integrally formed. The housing has a mounting groove, and one end of the first rotating shaft is located in the mounting groove. The cover has a limiting hole, and the other end of the first rotating shaft is located in the limiting hole. Along the radial direction of the first rotating shaft, the wall of the limiting hole directly or indirectly limits the first rotating shaft. The cover is fixedly connected to the housing, and both the first rotating shaft and the cover are separately set from the top cover. Therefore, the cover can be adjusted individually during installation, which can reduce the difficulty of positioning the first rotating shaft, thereby improving the coaxiality of the rotor and stator assembly and improving the stability of rotor rotation. Along the radial direction of the drive device, the size of the cover is smaller than that of the top cover. Therefore, if the cover is an injection molded part, its deformation after injection molding is smaller than that of the top cover, thus enabling the cover to accurately position the first rotating shaft.

Description

Technical Field

[0001] This application relates to the field of automotive thermal management technology, and more particularly to an electric valve. Background Technology

[0002] Electric valves include a drive mechanism that provides driving force to the valve core. However, in current drive mechanisms, the various gear shafts and the rotor shaft are limited by the upper and lower housings of the drive mechanism. Since the upper and lower housings are made of plastic and are welded together, and because the upper housing is typically a large, flat structure, it is prone to warping and deformation after injection molding and cooling. Errors in the installation of the upper and lower housings, as well as deformation of the upper housing itself, can cause misalignment of the rotor shaft, affecting the coaxiality of the rotor and stator, leading to friction between the rotor and stator, and affecting the normal operation of the electric valve. Summary of the Invention

[0003] This application provides an electric valve for reducing the risk of rotor shaft misalignment and improving the stability of the drive device.

[0004] This application provides an electric valve, which includes a driving device. The driving device includes a housing, a motor, a top cover, and a sealing cover. The driving device has a mounting cavity. The top cover is fixedly connected to the housing, and the top cover and the housing form the mounting cavity. The motor and the sealing cover are located in the mounting cavity. The motor includes a rotor and a first rotating shaft. The rotor and the first rotating shaft are fixedly connected or integrally formed. The housing has a mounting groove. One end of the first rotating shaft is located in the mounting groove. The sealing cover has a limiting hole. The other end of the first rotating shaft is located in the limiting hole, and a wall forming the limiting hole along the radial direction of the first rotating shaft directly or indirectly limits the first rotating shaft. The sealing cover is fixedly connected to the housing. The first rotating shaft and the sealing cover are both separately disposed from the top cover. The direction perpendicular to the first rotating shaft is defined as the radial direction of the driving device. Along the radial direction of the driving device, the size of the sealing cover is smaller than that of the top cover.

[0005] In the electric valve provided in this application, the cover is fixedly connected to the housing, and both the first rotating shaft and the cover are separately disposed from the top cover. Therefore, the position of the cover can be adjusted independently during installation, which reduces the difficulty of positioning the first rotating shaft, thereby improving the coaxiality of the rotor and stator assembly and enhancing the stability of rotor rotation. Furthermore, since both the first rotating shaft and the cover are separately disposed from the top cover, the top cover will not be subject to any obstruction from the rotor shaft when assembling it with the housing, facilitating the assembly of the top cover. Because the size of the cover is smaller than that of the top cover along the radial direction of the drive device, if the cover is an injection-molded part, its deformation after injection molding is smaller than that of the top cover, thus allowing the cover to accurately position the first rotating shaft. Attached Figure Description

[0006] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 An exploded view of one embodiment of the drive device for the electric valve provided in this application;

[0008] Figure 2 A cross-sectional view of one embodiment of the driving device provided in this application;

[0009] Figure 3 A cross-sectional view from another perspective of one embodiment of the driving device provided in this application;

[0010] Figure 4 A perspective view of the cover of the drive device provided in this application;

[0011] Figure 5 A perspective view of a portion of the drive device provided in this application;

[0012] Figure 6 for Figure 5 The image shown is a cross-sectional view of the drive device provided in this application.

[0013] Explanation of reference numerals in the attached figures:

[0014] 1-Shell;

[0015] 11-Mounting cavity;

[0016] 12-Mounting slot;

[0017] 13-Positioning boss;

[0018] 14 - Output port;

[0019] 2-Motor;

[0020] 21-Stator assembly;

[0021] 211 - Second mounting hole;

[0022] 222-Main body;

[0023] 223 - Wiring section;

[0024] 224 - Protrusion;

[0025] 22-Rotor;

[0026] 23-First pivot;

[0027] 3-Top cover;

[0028] 4-Capping;

[0029] 41 - Through hole;

[0030] 42-Avoidance groove;

[0031] 43-Limiting Hole

[0032] 45 - Side wall portion;

[0033] 46-top wall part;

[0034] 47-Allowance hole;

[0035] 48-First Installation Section;

[0036] 481 - First mounting hole;

[0037] 5-Bearings;

[0038] 6-Gear assembly;

[0039] 60 - Input gear;

[0040] 61 - First Gear;

[0041] 62 - Second gear;

[0042] 63 - Third gear;

[0043] 64 - Output gear;

[0044] 641 - Second pivot;

[0045] 7-Substrate;

[0046] 71-Positioning groove;

[0047] 72 - Positioning hole;

[0048] 8-Fasteners;

[0049] 10-Outer shell. Detailed Implementation

[0050] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0051] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0052] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0053] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0054] like Figure 1 and Figure 2 As shown, this application provides an electric valve, which includes a driving device. The driving device includes a housing 10, a motor 2, and a cover 4. The housing 10 has a mounting cavity 11, and the motor 2 and the cover 4 are both located in the mounting cavity 11. The housing 10 includes a shell 1 and a top cover 3, and the top cover 3 is fixedly connected to the shell 1. The motor 2 includes a rotor 22 and a first rotating shaft 23, which are fixedly connected or integrally formed. The shell 1 has a mounting groove 12, and one end of the first rotating shaft 23 is located in the mounting groove 12. The cover 4 has a limiting hole 43, and the other end of the first rotating shaft 23 is located in the limiting hole 43. Along the radial direction of the first rotating shaft 23, the wall of the limiting hole 43 directly or indirectly limits the first rotating shaft 23. The cover 4 is fixedly connected to the shell 1. The first rotating shaft and the cover 4 are both separately disposed from the top cover 3. The direction perpendicular to the first rotating shaft 23 is defined as the radial direction of the driving device. Along the radial direction of the driving device, the size of the cover 4 is smaller than that of the top cover 23.

[0056] The drive unit is used to provide driving force to other devices. For example, it can power a refrigerant ball valve and control the rotation of the valve core. In current drive units, the two ends of the motor shaft are interference-fitted with the housing and top cover, respectively. The housing and top cover are made of plastic and are connected by welding. Due to assembly and manufacturing errors, the openings in the housing and top cover are difficult to align, causing the motor shaft to misalign. This results in poor coaxiality between the rotor and stator, potentially leading to friction or impact between the rotor and stator, affecting the normal operation of the drive unit.

[0057] In the driving device provided in this application embodiment, the motor 2 includes a stator assembly 21, which is located outside the rotor 22, or rather, sleeved on the rotor 22. The stator assembly 21 is the stationary part relative to the housing 1. The stator assembly 21 can be equipped with windings, and can generate a specific magnetic field after the stator assembly 21 is energized. The rotor 22 is the rotating part, and can rotate when the magnetic field of the stator assembly 21 changes. One end of the first rotating shaft 23 is installed in the mounting groove 12 of the housing 1, and the other end is connected to the cover 4. The cover 4 is located on the top of the rotor 22 and is connected to the housing 1. Specifically, the sidewall of the cover 4 is connected to the housing 1 through a connector, thereby fixing the cover 4. The through hole 41 is located on the side of the cover 4 away from the mounting groove 12. The cover 4 is fixedly connected to the housing 1. Both the first rotating shaft 23 and the cover 4 are separately set from the top cover 3. Therefore, the cover 4 can be adjusted independently during installation, which can reduce the positioning difficulty of the first rotating shaft 23, improve the coaxiality of the rotor 22 and the stator assembly 21, improve the assembly accuracy of the drive device, and improve the rotational stability of the rotor 22. During installation, the first rotating shaft 23 can be adjusted to the correct preset position first, and then the cover 4 can be used to limit the rotating shaft 21 before installing other components of the drive device. By improving the installation accuracy of the first rotating shaft 23, the coaxiality of the rotor 22 and the stator assembly 21 can be improved, the rotational stability of the rotor 22 can be improved, and the possibility of collision can be reduced. The top of the housing 1 has an opening, which facilitates the installation of parts inside the housing 1 during assembly. After installation, the top cover 3 is installed on the opening to close the mounting cavity 11, which isolates and protects the parts inside the mounting cavity 11. The side of the housing 1 with the opening is the top of the housing 1. Since the first rotating shaft 23 and the cover 4 are both separately disposed from the top cover 3, the top cover 3 will not be obstructed by the rotor 22 shaft when it is assembled with the housing 1, which facilitates the assembly of the top cover 3. Since the size of the cover 4 is smaller than that of the top cover 3 along the radial direction of the drive device, if the cover 4 is an injection molded part, its deformation after injection molding is smaller than that of the top cover 3, thereby enabling the cover 4 to accurately position the first rotating shaft 23.

[0058] Regarding the phrase "the wall forming the limiting hole 43 directly or indirectly limits the first rotating shaft 23 along the radial direction of the first rotating shaft 23", it should be noted that "direct limiting" means that the two are in direct contact, while "indirect limiting" means that the two can be separated by other structures but can still transmit force. For example, in this application, a bearing 5 is provided between the wall forming the limiting hole 43 and the first rotating shaft 23. The bearing 5 can be radially limited by the wall forming the limiting hole 43, and the bearing 5 can radially limit the first rotating shaft 23.

[0059] like Figure 1 and Figure 2As shown, in one possible embodiment, the drive device includes at least one bearing 5, which is sleeved on the outer periphery of the first rotating shaft 23. The at least one bearing 5 is located in the limiting hole 43 and is fixedly or limitingly connected to the side wall forming the limiting hole 43. In another embodiment, the wall forming the limiting hole 43 is interference-fitted with the outer peripheral wall of the first rotating shaft 23.

[0060] The bearing 5 can be a ball bearing 5, which includes an inner ring and an outer ring, with rolling elements disposed between the inner and outer rings. The rolling elements can be spherical, and during operation, the rolling elements can roll between the inner and outer rings. The bearing 5 can reduce the rotatable connection between the first rotating shaft 23 and the housing 1, limiting the first rotating shaft 23 while allowing it to rotate smoothly and reducing friction. The bearing 5 is also disposed between the cover 4 and the first rotating shaft 23, and through a similar principle, can reduce the friction between the first rotating shaft 23 and the cover 4. The bearings 5 ​​located at both ends of the first rotating shaft 23 can respectively limit the first rotating shaft 23, improving its installation stability. In addition, when the rotor 22 rotates at high speed, it is easy to collide with the windings of the stator assembly 21, causing damage and noise. The bearing 5 can enable the rotor 22 to operate smoothly and efficiently, ensuring the stable operation of the motor 2 and reducing operating noise.

[0061] like Figure 2 As shown, in one possible implementation, the cover 4 includes a limiting hole 43 that protrudes away from the motor 2, a through hole 41 is located on the bottom wall of the limiting hole 43, and a bearing 5 is located in the limiting hole 43.

[0062] A limiting hole 43 is located at the top of the cover 4 and protrudes away from the rotor 22. One end of the first rotating shaft 23 near the cover 4 can extend into the limiting hole 43. At least one bearing 5 is installed in the limiting hole 43, with the outer ring of the bearing 5 abutting against the inner wall of the limiting hole 43, and the inner ring of the bearing 5 sleeved on the first rotating shaft 23. The limiting hole 43 provides installation space for the bearing 5 and limits its movement, reducing the possibility of the bearing 5 disengaging from the first rotating shaft 23. A through hole 41 can be provided on the top wall of the cover 4, allowing a portion of the first rotating shaft 23 to pass through the through hole 41 when the length of the first rotating shaft 23 is large.

[0063] like Figure 4 As shown, in one possible embodiment, the cover 4 includes a first mounting portion 48 having a first mounting hole 481; the stator assembly 21 includes a main body 222 having a second mounting hole 211 located radially outward of the main body 222; the drive device includes a fastener 8, such as... Figure 6The direction H shown is defined as the extension direction H of the rotor 22 shaft. The fastener 8 extends along the axial direction of the drive device. The first mounting hole 481 and the second mounting hole 211 are arranged along the axial direction of the drive device. A part of the fastener 8 passes through the first mounting hole 481 and a part of the fastener 8 passes through the second mounting hole 211. One end of the fastener 8 is fixedly connected to the housing 1, and the other end of the fastener 8 abuts against the first mounting part 48.

[0064] The cover 4 and stator assembly 21 can be connected to the housing 1 respectively using fastener 8. The structure is simple and the fastener 8 is easy to install. Fastener 8 can improve the accuracy of the installation position of the cover 4 and stator assembly 21, and improve the coaxiality of the rotor 22 and stator assembly 21, making the valve device more reliable and stable.

[0065] like Figure 4 As shown, in one possible embodiment, the cover 4 includes a top wall portion 45 along the axial direction of the drive device, the top wall portion 45 being closer to the top cover 33 than the main body portion 222, a through hole 41 being located in the top wall portion 45, the top wall portion 45 having at least one clearance hole 47, and the stator assembly 21 including at least one protrusion 224 protruding from the main body portion 222 toward the top cover 3, the protrusion 224 being located in the clearance hole 47.

[0066] The protrusion 224 is used to set the winding wires. By providing the clearance hole 47, when the cover 4 is installed in place, the protrusion 224 can extend into the clearance hole 47 to achieve the clearance function, making full use of the axial space of the drive device and helping to reduce the size of the drive device. In addition, the protrusion 224 can also play a positioning role for the top wall 45.

[0067] like Figure 1 As shown, in one possible embodiment, the cover 4 includes a sidewall portion 45 located radially outward of the main body portion 222, and a first mounting portion 48 extending radially outward from the sidewall portion 45 along the drive device, the first mounting portion 48 being integrally formed with the sidewall portion 45.

[0068] like Figure 4 and Figure 5 As shown, the cover 4 includes a relief groove 42 located on the side wall portion 45 of the cover 4; the stator assembly 21 includes a wiring portion 223 that protrudes radially from the outer periphery of the main body portion 222, and at least a portion of the wiring portion 223 is located in the relief groove 42. Along the axial direction of the drive device, the relief groove 42 has an opening at one end away from the top cover 3.

[0069] Since the stator assembly 21 requires an external power supply or other control equipment, it is typically equipped with connectors such as leads for connection. The clearance groove 42 provides space and a channel for the wiring portion of the stator assembly 21, allowing it to connect to the power supply or the base plate 7 via the wiring portion. An opening at the end of the clearance groove 42 away from the top cover 3 is provided to allow the wiring portion 223 to pass, facilitating the axial installation of the cover 4.

[0070] like Figure 1 and Figure 3 As shown, in one possible implementation, the drive device includes a gear assembly 6, which includes an input gear 60 that is fixedly connected to the first rotating shaft 23.

[0071] The driving device includes a base plate 7, which is fixedly connected to the housing 1. The base plate 7 has a positioning hole 72.

[0072] The gear assembly 6 includes an output gear 64, which includes a second shaft 641. The extending direction of the wall forming the positioning hole 72 is the same as the extending direction of the second shaft 641. A portion of the second shaft 641 is located in the positioning hole 72 and slides with the wall forming the positioning hole 72.

[0073] like Figure 3 As shown, the substrate 7 has a positioning hole 72, and the output gear 64 includes a second rotating shaft 641, a portion of which passes through the positioning hole 72. The positioning hole 72 can limit the second rotating shaft 641, thereby improving the stability of the gear assembly 6 during rotation.

[0074] The second rotating shaft 641 provides positioning and support for the output gear 64. The second rotating shaft 641 is rotatably mounted within the mounting cavity 11. The positioning hole 72 is located on the side of the substrate 7 away from the gear assembly 6. The positioning hole 72 penetrates the substrate 7 and serves to avoid the second rotating shaft 641. It also provides radial restraint when the second rotating shaft 641 rotates, reducing the possibility of axis misalignment, improving rotational stability, and further reducing the possibility of the output gear 64 becoming skewed.

[0075] The gear assembly 6 and the base plate 7 are located in the mounting cavity 11. At least one gear shaft included in the gear assembly 6 is connected to the housing 1, and the gear assembly 6 is connected to the motor 2. The base plate 7 is connected to the housing 1.

[0076] In one possible implementation, the gear assembly 6 and the base plate 7 are located in the mounting cavity 11, defining a projection surface that is perpendicular to the axial direction of the drive device. Along the axial direction of the drive device, the projection of the base plate 7 onto the projection surface coincides with the projection portion of the gear assembly 6 onto the projection surface.

[0077] Gear assembly 6 is used to realize the transmission function. Gear assembly 6 includes multiple gears, which can adjust torque and speed to adapt to different working scenarios and drive load requirements. Gear assembly 6 is connected to rotor 22 for transmission, and is used to convert and output the kinetic energy of rotor 22. When the torque during the operation of the drive device is large, the gears in gear assembly 6 may misalign or jump, or the gears may disengage or mesh abnormally, resulting in tooth misalignment and drive device failure.

[0078] The driving device provided in this application includes a base plate 7, which is used to limit the gear assembly 6. Specifically, the base plate 7 is fixedly connected to the housing 1 and can press the gear assembly 6 to increase the robustness of the driving device during operation and improve its working stability.

[0079] The drive device provided in this embodiment includes a bearing 5 and a base plate 7, which improves the stability of the drive device's operation, especially maintaining high stability and reliability when the drive device has a large torque. The drive device can be used to drive a refrigerant ball valve. In actual use, the refrigerant ball valve may stall under complex hydraulic conditions, requiring increased torque from the drive device to clear the blockage and ensure normal operation. The drive device provided in this embodiment can meet the high torque requirements and adapt to more working scenarios.

[0080] like Figure 1 As shown, in one possible implementation, the substrate 7 has at least two positioning grooves 71, which are located on both sides of the substrate 7, and the housing 1 has positioning protrusions that extend at least partially into the positioning grooves 71.

[0081] The substrate 7 has a relief recess or other structure on the side near the gear assembly 6 that is adapted to the gear assembly 6. Only when the substrate 7 is correctly installed can it engage with the gear assembly 6 to achieve the limiting function of the gear assembly 6. The positioning groove 71 is used to position the substrate 7 during installation, reducing the possibility of incorrect installation and facilitating installation. Specifically, the substrate 7 has at least two positioning grooves 71, and at least a portion of the positioning protrusion can extend into the positioning grooves 71. The substrate 7 is only installed when all positioning grooves 71 are correctly engaged with the positioning protrusion.

[0082] like Figure 1 As shown, in one possible implementation, the gear assembly 6 includes an input gear 60, a first gear 61, a second gear 62, a third gear 63, and an output gear 64. The first gear 61 is connected to the rotor 22, the second gear 62 is connected to the first gear 61 and the third gear 63, and the output gear 64 is connected to the third gear 63.

[0083] Input gear 60, first gear 61, second gear 62, third gear 63, and output gear 64 are rotatably mounted in mounting cavity 11, with first gear 61 connected to motor 2. The shapes of first gear 61, second gear 62, third gear 63, and output gear 64 can be set according to actual needs. By setting different parameters such as module, number of teeth, and pitch circle radius, the gear assembly 6 can adjust the torque and speed output by motor 2 to obtain the required output torque and speed. The base plate 7 can abut against output gear 64 along the axial direction of the second rotating shaft, thereby limiting the output gear 64 and improving the stability of the drive device. The number and arrangement of gears in gear assembly 6 can be adjusted according to actual needs and are not specifically limited here.

[0084] In one possible implementation, the input gear 60, the first gear 61, the second gear 62, the third gear 63, and the output gear 64 are made of metal.

[0085] Electric valves require a relatively large torque, therefore the input gear 60, first gear 61, second gear 62, third gear 63, and output gear 64 require high strength. Using metal materials can improve their mechanical properties to meet operational requirements. The metal material can be alloy steel.

[0086] like Figure 3 As shown, in one possible embodiment, the housing 1 has a positioning boss 13 and an output hole 14. The positioning boss 13 is arranged circumferentially along the output hole 14, and the positioning boss 13 abuts against the output gear 64.

[0087] The positioning boss 13 supports the output gear 64, improving the stability of its rotation. At least a portion of the shaft of the output gear 64 passes through the output hole 14, allowing it to connect to other external devices for power output. The output hole 14 also enhances rotational stability. Furthermore, the bottom of the shaft of the output gear 64 may be provided with internal teeth to facilitate transmission connection between external devices and the output gear 64.

[0088] In one possible implementation, the electric valve includes a valve core, and an output gear 64 is drivenly connected to the valve core.

[0089] The electric valve is used to control fluid flow. The output gear 64 controls the rotation of the valve core, thereby opening or closing the electric valve and controlling the fluid flow rate and pressure. The valve core can be equipped with a gear that meshes with the output gear 64 for transmission, or it can be indirectly connected to the output gear 64 through other connecting components. The valve core can be spherical, cylindrical, disc-shaped, or cylindrical, etc., and its shape can be set according to actual needs.

[0090] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this application. The above description is only a preferred embodiment of this application, but this application does not limit the scope of implementation to what is shown in the drawings. Any changes made in accordance with the concept of this application, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, should be within the protection scope of this application.

Claims

1. An electric valve, characterized in that, The electric valve includes a drive device, which includes a housing (10), a motor (2), and a cover (4). The housing (10) has a mounting cavity (11), and the motor (2) and the cover (4) are both located in the mounting cavity (11). The housing (10) includes a shell (1) and a top cover (3), and the top cover (3) is fixedly connected to the shell (1). The motor (2) includes a rotor (22) and a first rotating shaft (23), and the rotor (22) and the first rotating shaft (23) are fixedly connected or integrally formed. The shell (1) has a mounting groove (12), and one end of the first rotating shaft (23) is... In the mounting groove (12), the cover (4) has a limiting hole (43), the other end of the first rotating shaft (23) is located in the limiting hole (43), and along the radial direction of the first rotating shaft (23), the wall of the limiting hole (43) directly or indirectly limits the first rotating shaft (23); the cover (4) is fixedly connected to the housing (1), the first rotating shaft (23) and the cover (4) are both separated from the top cover (3), the direction perpendicular to the first rotating shaft (23) is defined as the radial direction of the driving device, and along the radial direction of the driving device, the size of the cover (4) is smaller than that of the top cover (3).

2. The electric valve according to claim 1, characterized in that, The driving device includes at least one bearing (5), which is sleeved on the outer periphery of the first rotating shaft (23). At least one bearing (5) is located in the limiting hole (43) and is fixedly connected or limitedly connected to the side wall forming the limiting hole (43). Alternatively, the wall forming the limiting hole (43) may be interference-fitted with the outer peripheral wall of the first rotating shaft (23).

3. The electric valve according to claim 2, characterized in that, The motor (2) includes a stator assembly (21) located outside the rotor (22). The cover (4) includes a first mounting portion (48) having a first mounting hole (481). The stator assembly (21) includes a main body having a second mounting hole (211) located radially outside the main body (222). The drive device includes a fastener (8), and the axial direction of the drive device is defined as... The extension direction of the rotor (22) shaft, the fastener (8) extends along the axial direction of the drive device, the first mounting hole (481) and the second mounting hole (211) are arranged along the axial direction of the drive device, a part of the fastener (8) passes through the first mounting hole (481), a part of the fastener (8) passes through the second mounting hole (211), one end of the fastener (8) is fixedly connected to the housing (1), and the other end of the fastener (8) abuts against the first mounting part (48).

4. The electric valve according to claim 3, characterized in that, The cover (4) includes a top wall portion (46) along the axial direction of the drive device, the top wall portion (46) being closer to the top cover than the main body portion, the limiting hole being located in the top wall portion (46), the top wall portion (46) having at least one clearance hole (47), the stator assembly (21) including at least one protrusion (224) protruding from the main body portion toward the top cover, the protrusion being located in the clearance hole (47).

5. The electric valve according to claim 3, characterized in that, The cover (4) includes a side wall portion (45) located radially outside the main body portion (222), and the first mounting portion (48) extends radially outward from the side wall portion (45) along the drive device. The first mounting portion (48) and the side wall portion (45) are integral structures. The cover (4) includes a clearance groove (42) located on the side wall portion (45) of the cover (4); the stator assembly (21) includes a wiring portion (223) that protrudes radially from the outer periphery of the main body portion (222), at least a portion of the wiring portion (223) being located in the clearance groove (42), and the clearance groove (42) having an opening at one end away from the top cover (3) along the axial direction of the drive device.

6. The electric valve according to any one of claims 1-5, characterized in that, The driving device includes a gear assembly (6), the gear assembly (6) includes an input gear (60), and the input gear (60) is fixedly connected to the first rotating shaft (23); The driving device includes a base plate (7), which is fixedly connected to the housing (1), and the base plate (7) has a positioning hole (72); The gear assembly (6) includes an output gear (64), the output gear (64) includes a second shaft (641), the extension direction of the wall forming the positioning hole (72) is the same as the extension direction of the second shaft (641), a portion of the second shaft (641) is located in the positioning hole (72) and slides with the wall forming the positioning hole (72).

7. The electric valve according to claim 6, characterized in that, The gear assembly (6) and the base plate (7) are located in the mounting cavity (11) and define a projection surface. The projection surface is perpendicular to the axial direction of the driving device. Along the axial direction of the driving device, the projection of the base plate (7) on the projection surface coincides with the projection of the gear assembly (6) on the projection surface.

8. The electric valve according to claim 6, characterized in that, The substrate (7) has at least two positioning grooves (71), which are located on both sides of the substrate (7). The housing (1) has a positioning protrusion that extends at least partially into the positioning groove (71).

9. The electric valve according to claim 6, characterized in that, The housing (1) has a positioning boss (13) and an output hole (14). The positioning boss (13) is arranged circumferentially along the output hole (14), and the positioning boss (13) abuts against the output gear (64).

10. The electric valve according to claim 6, characterized in that, The electric valve includes a valve core, and the output gear (64) is drivenly connected to the valve core.

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