Control device and electric valve

Abstract

The invention discloses a control device and an electric valve comprising the control device, the control device comprises a shell, a stator assembly and a rotor assembly, and the stator assembly is located on the periphery of the rotor assembly; the stator assembly comprises a first installation part, the shell comprises a protruding part, the first installation part comprises a limiting groove, the limiting groove basically extends in the radial direction of the stator assembly, and the protruding part is fixedly connected or connected with the first installation part in a limiting mode. At least part of the protruding part is located in the limiting groove and abuts against the wall forming the limiting groove or is in clearance fit with the wall forming the limiting groove, circumferential limiting can be conducted on the stator assembly, and rotation of the stator assembly relative to the shell can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of electrical technology, and in particular to a control device and an electric valve. Background Art

[0002] The control device can be applied to the electric valve. The control device generally includes a motor and a housing. The motor is installed in the housing. The motor includes a stator and a rotor. When the rotor moves, the rotor may generate a circumferential reaction force on the stator, so that the stator may rotate relative to the housing, thereby affecting the performance of the control device. Summary of the invention

[0003] One purpose of the present application is to provide a control device and an electric valve to improve the stability of the stator.

[0004] One embodiment of the present application provides a control device, including a shell, a stator assembly and a rotor assembly, wherein the stator assembly is located at the outer periphery of the rotor assembly; the stator assembly includes a first mounting portion, the shell includes a raised portion, the first mounting portion includes a limiting groove, the limiting groove extends along the radial direction of the stator assembly, at least part of the raised portion is located in the limiting groove and abuts or gap-fits with a wall forming the limiting groove, and the raised portion is fixedly connected or limitedly connected to the first mounting portion.

[0005] One embodiment of the present application also provides an electric valve, including a valve body assembly, a valve core assembly and the above-mentioned control device, the control device includes a transmission assembly, the rotor assembly is transmission-connected to the transmission assembly, the valve core assembly includes a valve shaft, the valve shaft is transmission-connected to the transmission assembly, and the shell is fixedly connected or limit-connected to the valve body assembly.

[0006] In the control device and electric valve provided in the embodiments of the present application, the limit groove extends radially along the stator assembly, and at least part of the protrusion is located in the limit groove and abuts or gap-fits with the wall forming the limit groove, so that the stator assembly can be limited circumferentially and the rotation of the stator assembly relative to the housing can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the control device of the present application is shown;

[0008] Figure 2 Shows Figure 1 A schematic diagram of the three-dimensional structure of a part of the control device shown;

[0009] Figure 3 Shows Figure 1 A schematic cross-sectional view of the control device shown;

[0010] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of a part of the control device shown;

[0011] Figure 5 Shows Figure 4 An exploded schematic diagram of a portion of the control device shown;

[0012] Figure 6 Shows Figure 5 A schematic diagram of the three-dimensional structure of the stator assembly of the control device shown;

[0013] Figure 7 Shows Figure 4 A schematic structural diagram of a portion of the control device shown at an angle;

[0014] Figure 8 Shows Figure 7 A partial cross-sectional structural schematic diagram of a portion of the control device shown along line AA;

[0015] Fig. 9 Shows Figure 5 An exploded schematic diagram of the rotor assembly shown;

[0016] Fig.10 Shows Figure 6 A schematic diagram of the three-dimensional structure of the stator core of the rotor assembly shown;

[0017] Fig.11 Shows Fig.10 The structure schematic diagram of the stator core shown at an angle;

[0018] Fig.12 A three-dimensional structural schematic diagram of an embodiment of the electric valve of the present application is shown;

[0019] Fig.13 Shows Fig.12 An exploded schematic diagram of the electric valve shown;

[0020] Fig.14 Shows Fig.13 The control device of the electric valve shown is a schematic structural diagram at an angle;

[0021] Fig.15 Shows Fig.13 The structure diagram of the valve body assembly and the valve core assembly shown is at an angle;

[0022] Fig.16 Shows Fig.13 A schematic structural diagram of a portion of the control device shown at an angle;

[0023] Fig.17 Shows Fig.12 The schematic diagram of the structure of the electric valve shown is at an angle;

[0024] Fig.18 Shows Fig.17 The cross-sectional structure diagram of the electric valve along line BB is shown.

[0025] Reference numerals:

[0026] 100, electric valve; 1, valve body assembly; 11, first side portion; 12, second mounting hole; 13, second position-limiting component; 2, valve core assembly; 21, valve shaft; 22, valve ball; 3, control device; 31, stator assembly; 312, first groove; 313, first end face portion; 314, second protrusion; 315, stator core; 3151, stator yoke; 3152, stator tooth portion; 3153, first side wall; 316, housing; 317, winding; 38, first mounting portion; 381, first through hole; 39, position-limiting groove; 318, stator core; 319, stator yoke; 320, stator tooth portion; 321, stator tooth portion; 322, stator core; 323, stator yoke; 324, stator tooth portion; 325, stator core; 326, housing; 327, winding; 330, first mounting portion; 331, first through hole; 332, position-limiting groove; 333, stator core; 334, stator yoke; 335, stator tooth portion; 336, stator yoke; 337, stator tooth portion; 338, stator core; 339, stator yoke; 340, stator yoke; 341, stator yoke; 342, stator yoke portion; 343, stator yoke portion; 344, stator yoke portion; 345, stator yoke portion; 346, stator yoke portion; 347, stator yoke portion; 348, stator yoke portion; 349, stator yoke portion; 350, stator yoke portion; 91. bottom wall; 392. side wall; 32. rotor assembly; 321. bracket; 324. second groove; 322. permanent magnet; 323. convex portion; 33. transmission assembly; 331. first gear; 332. output gear; 34. housing; 341. first protruding portion; 342. first mounting hole; 343. convex rib; 37. second mounting portion; 371. second through hole; 30. cavity; 35. first shaft portion; 36. first limiting component; 361. large diameter portion; 362. small diameter portion; 311. outer periphery; 3155. inner periphery. DETAILED DESCRIPTION

[0027] The embodiments are described in detail below with reference to the accompanying drawings.

[0028] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In this article, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply that there is any such actual relationship or order between these components. It should be noted that the "limited connection" in this application includes detachable connections, such as threaded connections, snap connections, etc., and the "fixed connection" in this application includes non-detachable connections, such as welding, bonding, vulcanization fixation, riveting, insert injection molding, etc.

[0029] Figure 1-Figure 8A control device 3 is shown, which includes a transmission assembly 33, a stator assembly 31 and a rotor assembly 32, wherein the stator assembly 31 is located at the periphery of the rotor assembly 32; the transmission assembly 33 includes a first gear 331, and the rotor assembly 32 is transmission-connected with the first gear 331; the control device 3 includes a first shaft portion 35, at least a portion of the first gear 331 is located at the periphery of the first shaft portion 35, and the first gear 331 is slidably matched with the first shaft portion 35, so that the first gear 331 can rotate around the first shaft portion 35.

[0030] The axial direction of the stator assembly 31 is defined, and the rotor assembly 32 can rotate around the rotation axis. The axial direction of the stator assembly 31 is the same as the extension direction of the rotation axis of the rotor assembly 32. Figure 3 The radial direction of the stator assembly 31 is defined, and the radial direction of the stator assembly 31 is perpendicular to the axial direction of the stator assembly 31. In this embodiment, the central axis of the stator assembly 31 is defined, and the central axis of the stator assembly 31 is substantially coincident with the rotation axis of the rotor assembly 32. Figure 3 It is shown as S1 in FIG.

[0031] like Figure 2-Figure 6 As shown, the stator assembly 31 includes an outer peripheral portion 311. Along the radial direction of the stator assembly 31, the stator assembly 31 has a first groove 312 recessed in the outer peripheral portion 311, and a portion of the first shaft portion 35 is located in the first groove 312. Since a portion of the first shaft portion 35 is located in the first groove 312, the distance between the first shaft portion 35 and the central axis of the rotor assembly 32 is smaller, so that the radius of the first gear 331 can be reduced, the space occupied by the first gear 331 can be reduced, and the size of the control device 3 can be reduced.

[0032] In this embodiment, the extension direction of the first shaft portion 35 is parallel to the axial direction of the stator assembly 31, and the outer peripheral portion 311 of the stator assembly is cylindrical. Along the radial direction of the stator assembly 31, a portion of the first shaft portion 35 is away from the central axis of the stator assembly 31 relative to the outer peripheral portion 311, or in other words, a portion of the first shaft portion 35 is not located in the complete cylindrical surface where the outer peripheral portion 311 is located.

[0033] like Figure 3As shown, the control device 3 includes a housing 34, the housing 34 has a cavity 30, the first gear 331 is located in the cavity 30, and the first shaft portion 35 is fixedly connected to the housing 34. Along the axial direction of the stator assembly 31, at least part of the first gear 331 is located between the housing 34 and the stator assembly 31, one end of the first gear 331 abuts against or is clearance-fitted with the stator assembly 31, and the other end of the first gear 331 abuts against or is clearance-fitted with the wall forming the cavity 30, so that along the axial direction of the stator assembly 31, both axial ends of the first gear 331 are limited, which can limit the axial stringing of the first gear 331 and reduce noise. In other embodiments, the first shaft portion 35 can be an integral structure with the housing 34.

[0034] Specifically, Figure 3-Figure 5 As shown, the stator assembly 31 includes a first end face portion 313. Along the axial direction of the stator assembly 31, at least a portion of the first end face portion 313 is arranged opposite to the first gear 331. The stator assembly 31 includes a second protrusion 314. The second protrusion 314 protrudes from the first end face portion 313. The top of the second protrusion 314 is slidably matched with the first gear 331. The second protrusion 314 can reduce the axial size of the main body of the stator assembly 31 on the basis of realizing the axial limit of the first gear 331. In addition, the second protrusion 314 with a smaller top area can reduce the friction between the first gear 331 and the stator assembly 31. The first surface is defined, and the first surface is perpendicular to the axial direction of the stator assembly 31. The second protrusion 314 is located on the outer periphery of the first shaft portion 35. The projection of the second protrusion 314 on the first surface is roughly arc-shaped.

[0035] The stator assembly 31 includes a stator core 315 and a housing 316. The housing 316 is made of insulating material. At least part of the housing 316 is located on the periphery of the stator core 315. The housing 316 can protect and insulate the stator core 315. Fig.11 As shown, along the radial direction of the stator assembly 31 , a portion of the first groove 312 is recessed in the outer periphery of the stator core 315 , so that the first shaft portion 35 is closer to the rotor assembly 32 , further reducing the radial dimension of the first gear 331 .

[0036] like Figure 3-Figure 5 As shown, the housing 316 is made of plastic material, the housing 316 and the stator core 315 are fixedly connected by an insert injection molding process, the first gear 331 is made of plastic material, and one end of the first gear 331 is slidably matched with the housing 316. In this way, compared with the friction between the first gear 331 and the metal stator core 315, the hardness of the plastic housing 316 and the first gear 331 is closer, which can reduce the risk of scratching the first gear 331. In addition, the second protrusion 314 is also convenient to form by the injection molding process.

[0037] like Fig.10 , Fig.11As shown, the stator core 315 includes a stator yoke 3151 and a stator tooth 3152. The stator yoke 3151 surrounds the rotor assembly 32. The stator yoke 3151 includes an inner circumference 3155. Along the radial direction of the stator assembly 31, the inner circumference 3155 faces the rotor assembly 32. The inner circumference 3155 includes a first side wall 3153. Along the radial direction of the stator assembly 31, the stator tooth 3152 extends from the first side wall 3153 to the rotor assembly 32. The first side wall 3153 is a plane, and the extension direction of the first side wall 3153 and the stator tooth 3152 are approximately perpendicular. The stator assembly 31 includes a winding 317, and the winding 317 is located on the outer periphery of the stator tooth 3152. Since the first side wall 3153 is a plane and the first side wall 3153 is substantially perpendicular to the extension direction of the stator teeth 3152, the winding operation of the winding 317 can be facilitated compared to the arc-shaped first side wall 3153. "Substantially perpendicular" means that the angle between the two is within the range of 80° to 100°.

[0038] like Figure 3 , Fig. 9 As shown, the rotor assembly 32 includes a bracket 321 and a permanent magnet 322, the permanent magnet 322 surrounds the bracket 321 along the circumference of the bracket 321, the inner circumference of the permanent magnet 322 is a cylindrical surface, the permanent magnet 322 includes a convex portion 323, the convex portion 323 protrudes from the inner circumference of the permanent magnet 322 along the radial direction of the rotor assembly 32, the outer circumference of the bracket 321 is arranged opposite to the inner circumference of the permanent magnet 322, the bracket 321 has a second groove 324 recessed in the outer circumference of the bracket 321, at least part of the convex portion 323 is located in the second groove 324 and cooperates with the wall forming the second groove 324. At least part of the convex portion 323 is located in the second groove 324 and cooperates with the wall forming the second groove 324, which can increase the difficulty of relative rotation between the permanent magnet 322 and the bracket 321.

[0039] like Figure 4-Figure 8As shown, the stator assembly 31 includes a first mounting portion 38, the housing 34 includes a first protrusion 341, the first mounting portion 38 includes a limiting groove 39, the limiting groove 39 extends in the radial direction of the stator assembly 31, at least part of the first protrusion 341 is located in the limiting groove 39 and abuts or gap fits with the wall forming the limiting groove 39, and the first protrusion 341 is fixedly connected or limitedly connected with the first mounting portion 38. At least part of the first protrusion 341 is located in the limiting groove 39 and abuts or gap fits with the wall forming the limiting groove 39, which can limit the stator assembly 31 in the circumferential direction, reduce the rotation of the stator assembly 31 relative to the housing 34, especially the rotation of the stator assembly 31 relative to the housing 34 when the rotor assembly 32 moves. The limiting groove 39 extends in the radial direction of the stator assembly 31, so that the positioning groove 39 can basically limit the stator assembly 31 in the circumferential direction, reducing the risk of over-positioning. It should be noted that "the limiting groove 39 extends radially along the stator assembly 31" means: the extension direction of the limiting groove 39 is defined as the first direction, the line connecting the first mounting portion 38 and the central axis of the stator assembly 31 is defined as the second direction, and the angle between the first direction and the second direction is less than 10°.

[0040] Specifically, Figure 6 , Figure 8 As shown, the wall forming the limiting groove 39 includes a bottom wall 391 and two side walls 392 arranged oppositely, the side walls 392 are parallel or substantially parallel to the axial direction of the stator assembly 31, along the circumference of the stator assembly 31, at least part of the first protrusion 341 is located between the two side walls 392, and the outer periphery of the first protrusion 341 abuts or is gap-fitted with the two side walls 392. In this embodiment, the outer periphery of the first protrusion 341 is cylindrical or quasi-cylindrical. The bottom wall 391 is perpendicular or substantially perpendicular to the axial direction of the stator assembly 31, the first protrusion 341 extends along the axial direction of the stator assembly 31, along the axial direction of the stator assembly 31, the bottom wall 391 is arranged oppositely to the top of the first protrusion 341, and the bottom wall 391 abuts against the top of the first protrusion 341, so that the stator assembly 31 can be axially limited. Therefore, the circumferential limiting structure and the axial limiting structure of the stator assembly 31 are both arranged on the first mounting portion 38, so that the space occupied by the limiting structure can be reduced. "Approximately perpendicular" means that the angle between the two is in the range of 80° to 100°, and "approximately parallel" means that the angle between the two is in the range of 0° to 10°. "Clearance fit" in this application means that the gap width between the two is less than 0.2 mm.

[0041] like Figure 6 , Figure 8As shown, in this embodiment, the first protrusion 341 has a first mounting hole 342, and the first mounting hole 342 extends from the top of the first protrusion 341 along the axial direction of the stator assembly 31; the first mounting portion 38 has a first through hole 381, and the first through hole 381 extends from the bottom wall 391 along the axial direction of the stator assembly 31, and the first through hole 381 is correspondingly arranged to the first mounting hole 342. The control device 3 includes a first limiting component 36, which includes a large diameter portion 361 and a small diameter portion 362. Part of the small diameter portion 362 is located in the first mounting hole 342, and part of the small diameter portion 362 is located in the first through hole 381. Along the axial direction of the stator assembly 31, at least part of the first mounting portion 38 is located between the large diameter portion 361 and the top of the first protrusion 341, and the large diameter portion 361 abuts against the first mounting portion 38. In this way, the stator assembly 31 can be axially limited by the large diameter portion 361 and the first protrusion 341, thereby reducing the axial vibration of the stator assembly 31 relative to the housing 34. The first limiting component 36 can be a screw.

[0042] The stator assembly 31 includes two first mounting portions 38, one of which is located on one side of the stator assembly 31, and the other first mounting portion 38 is located on the other side of the stator assembly 31 along the radial direction of the stator assembly 31, and the two first mounting portions 38 are centrally symmetrically arranged relative to the central axis of the stator assembly 31. In this way, the stator assembly 31 can be limited with as few first mounting portions 38 as possible, and the centrally symmetrical first mounting portions 38 can make the force on the stator assembly 31 more uniform.

[0043] like Figure 4-Figure 8 As shown, the first mounting portion 38 is an integral structure with the housing 316, which is easy to manufacture. The first mounting portion 38 protrudes from the outer periphery of the stator core 315 along the radial direction of the stator assembly 31. In this way, the distance between the first mounting portion 38 and the central axis of the stator assembly 31 can be increased, so that the circumferential positioning of the stator assembly 31 is more accurate.

[0044] like Figure 5 , Figure 7As shown, the housing 34 includes at least two ribs 343, each of which is spaced apart along the circumference of the stator assembly 31; the ribs 34 extend radially along the stator assembly 31, and along the radial direction of the stator assembly 31, one end of the ribs 343 relatively close to the stator assembly 31 abuts against or has a clearance fit with the outer peripheral portion 311 of the stator assembly 31. The ribs 343 can limit the stator assembly 31 in radial direction, so that the positioning of the stator assembly 31 relative to the housing 34 is more accurate. Specifically, at least two ribs 343 are centrally symmetrically arranged relative to the central axis of the stator assembly 31, so that the pair of ribs 343 can limit the two sides of the stator assembly 31 in radial direction in the same direction. By limiting the stator assembly 31 in radial direction by the ribs 34, the concentricity of the stator assembly 31 and the rotor assembly 32 can be made higher, thereby improving the efficiency of the motor.

[0045] Figure 12-Figure 18 The electric valve 100 is shown, and the electric valve 100 includes a control device 3, a valve body assembly 1 and a valve core assembly 2. The control device 3 includes a housing 34, a transmission assembly 33, a stator assembly 31 and a rotor assembly 32. The valve core assembly 2 includes a valve shaft 21 and a valve ball 22. The valve shaft 21 is in transmission connection with the transmission assembly 33, so that the rotor assembly 32 can drive the valve ball 22 to rotate. The rotation axis of the valve shaft 21 is Fig.18 The housing 34 is fixedly connected or limitedly connected to the valve body assembly 1, so that the electric valve 100 can be installed as a whole. The axial direction of the valve shaft 21 is defined as the extending direction of the rotation axis of the valve shaft 21. Fig.18 The structure of the stator assembly 31 and the rotor assembly 32 is the same as that of the stator assembly 31 and the rotor assembly 32 in the control device 3 of the previous embodiment, and will not be described in detail here.

[0046] The shell 34 includes at least two second mounting portions 37, and the second mounting portion 37 has a second through hole 371; the valve body assembly 1 includes a first side portion 11, and along the axial direction of the valve shaft 21, at least part of the first side portion 11 is opposite to the shell 34; a part of the valve shaft 21 protrudes from the first side portion 11, or a part of the transmission assembly 33 extends from the first side portion 11 into the valve body assembly 1; the first side portion 11 has at least three second mounting holes 12, and each second mounting hole 12 is rotationally symmetrically distributed along the circumference of the valve shaft 21 with the valve shaft 21 as the center; at least two second through holes 371 correspond one-to-one to the two second mounting holes 12, and the number of the second mounting holes 12 is greater than or equal to the number of the second through holes 371, so that the shell 34 can have at least two rotation angles relative to the valve body assembly 1, and can better adapt to different spaces for accommodating the electric valve 100 without changing the components of the electric valve 100. In this embodiment, the shell 34 includes four second mounting portions 37, and each second through hole 371 is rotationally symmetrically distributed along the circumference of the valve shaft 21 with the valve shaft 21 as the center. The first side portion 11 has four second mounting holes 12, and the shell 34 can have four rotation angles relative to the valve body assembly 1.

[0047] The control device 3 includes a second limiting component 13, part of which is located in the second mounting hole 12, and part of which is located in the second through hole 371. The second limiting component 13 can be a screw. The first side portion 11 is substantially perpendicular to the axial direction of the valve shaft 21, and the second mounting portion 37 abuts against the first side portion 11 along the axial direction of the valve shaft 21. The transmission mechanism also includes an output gear 332, a part of which is sleeved on the outer periphery of the valve shaft 21 and is transmission-connected to the valve shaft 21.

[0048] 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 in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A control device (3), comprising a housing (34), a stator assembly (31) and a rotor assembly (32), wherein the stator assembly (31) is located at the periphery of the rotor assembly (32); the stator assembly (31) comprises a first mounting portion (38), the housing (34) comprises a first protruding portion (341), the first mounting portion (38) comprises a limiting groove (39), the limiting groove (39) extends along the radial direction of the stator assembly (31), at least a portion of the first protruding portion (341) is located in the limiting groove (39) and abuts against or loosely fits with a wall forming the limiting groove (39), and the first protruding portion (341) is fixedly connected or limit-connected to the first mounting portion (38).

2. The control device according to claim 1, characterized in that: The wall forming the limiting groove (39) comprises a bottom wall (391) and two side walls (392); the two side walls (392) are arranged opposite to each other; the bottom wall (391) is perpendicular or substantially perpendicular to the axial direction of the stator assembly (31); the first protrusion (341) extends along the axial direction of the stator assembly (31); along the axial direction of the stator assembly (31), the bottom wall (391) and the top of the first protrusion (341) are arranged opposite to each other; the bottom wall (391) and the top of the first protrusion (341) are arranged in abutment with each other; The side wall (392) is parallel or approximately parallel to the axial direction of the stator assembly (31), and along the circumferential direction of the stator assembly (31), at least part of the first protrusion (341) is located between the two side walls (392), and the outer periphery of the first protrusion (341) is in abutment with or clearance fit with the two side walls (392).

3. The control device according to claim 2, characterized in that: The first protrusion (341) has a first mounting hole (342), and the first mounting hole (342) extends from the top of the first protrusion (341) along the axial direction of the stator assembly (31); The first mounting portion (38) has a first through hole (381), the first through hole (381) extends from the bottom wall (391) along the axial direction of the stator assembly (31), and the first through hole (381) is arranged corresponding to the first mounting hole (342); The control device (3) comprises a first limiting component (36), the first limiting component (36) comprising a large diameter portion (361) and a small diameter portion (362), part of the small diameter portion (362) being located in the first mounting hole (342), and part of the small diameter portion (362) being located in the first through hole (381), and along the axial direction of the stator assembly (31), at least part of the first mounting portion (381) is located between the large diameter portion (361) and the top of the first protruding portion (341), and the large diameter portion (361) is in contact with the first mounting portion (381).

4. The control device according to claim 1, characterized in that: The stator assembly (31) comprises two first mounting portions (38), wherein along the radial direction of the stator assembly (31), one of the first mounting portions (38) is located on one side of the stator assembly (31), and the other first mounting portion (38) is located on the other side of the stator assembly (31), and the two first mounting portions (38) are centrally symmetrically arranged relative to the central axis of the stator assembly (31).

5. The control device according to claim 1, characterized in that: The stator assembly (31) comprises a stator core (315) and a shell (316); the shell (316) and the stator core (315) are fixedly connected by an insert injection molding process; the first mounting portion (38) and the shell (316) are an integral structure; the first mounting portion (38) protrudes from the outer periphery of the stator core (315) in the radial direction of the stator assembly (31).

6. The control device according to claim 5, characterized in that: The housing (34) comprises at least two convex ribs (343), and each of the convex ribs (343) is distributed at intervals along the circumference of the stator assembly (31); The convex rib (343) extends in the radial direction of the stator assembly (31), and along the radial direction of the stator assembly (31), an end portion of the convex rib (343) relatively close to the stator assembly (31) abuts against or is clearance-fitted with the outer periphery of the stator assembly (31).

7. The control device according to claim 6, characterized in that: At least two of the convex ribs (343) are centrally symmetrically arranged relative to the central axis of the stator assembly (31).

8. An electric valve (100), comprising a valve body assembly (1), a valve core assembly (2) and a control device (3) according to any one of claims 1 to 7, characterized in that: The control device (3) comprises a transmission assembly (33), the rotor assembly (32) is in transmission connection with the transmission assembly (33), the valve core assembly (2) comprises a valve shaft (21), the valve shaft (21) is in transmission connection with the transmission assembly (33), and the housing (34) is fixedly connected or limit-connected with the valve body assembly (1).

9. The electric valve (100) according to claim 8, characterized in that: The housing (34) comprises at least two second mounting portions (37), and the second mounting portions (37) have second through holes (371); The valve body assembly (1) comprises a first side portion (11), and along the axial direction of the valve shaft (21), at least a portion of the first side portion (11) is opposite to the housing (34); a portion of the valve shaft (21) protrudes from the first side portion (11), or a portion of the transmission assembly (33) extends from the first side portion (11) into the valve body assembly (1); The first side portion (11) has at least three second mounting holes (12), and each of the second mounting holes (12) is rotationally symmetrically distributed along the circumference of the valve shaft (21) with the valve shaft (21) as the center; at least two of the second through holes (371) correspond to the two second mounting holes (12) one by one, and the number of the second mounting holes (12) is greater than or equal to the number of the second through holes (371); the control device (3) comprises a second limiting component (13), part of the second limiting component (13) is located in the second mounting hole (12), and part of the second limiting component (13) is located in the second through hole (371); The first side portion (11) is substantially perpendicular to the axial direction of the valve shaft (21), and along the axial direction of the valve shaft (21), the second mounting portion (37) abuts against the first side portion (11).

10. The electric valve according to claim 9, characterized in that: The housing (34) comprises four second mounting portions (37), the first side portion (11) has four second mounting holes (12), and each of the second through holes (371) is distributed in a rotationally symmetrical manner along the circumference of the valve shaft (21) with the valve shaft (21) as the center.

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