CN116753326A

CN116753326A - Electric valve

Info

Publication number: CN116753326A
Application number: CN202310741572.4A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2023-09-15
Also published as: CN112824718A

Abstract

The application provides an electric valve, wherein a blank of a valve body is made of a metal material through forging or casting, the valve body is fixedly connected with a shell, the valve body is fixedly connected with a valve seat, a gear reduction mechanism is arranged in an inner cavity of a shell part, a valve core is arranged in the inner cavity of the valve body part, one end of a transmission shaft extends into a hole part of an output gear frame of the gear reduction mechanism, the output gear frame can drive the transmission shaft to circumferentially rotate, the other end of the transmission shaft extends into a groove of the valve core, and the transmission shaft can drive the valve core to circumferentially rotate. Compared with the background art, the leakage risk of the electric valve can be reduced.

Description

Electric valve

The application relates to a divisional application of an electric valve, the application number of which is 201911143482.5, the application date of which is 2019, 11 and 20.

Technical Field

The application relates to the technical field of fluid control, in particular to an electric valve.

Background

FIG. 1a is a schematic cross-sectional view of an electrically operated valve according to the background art; fig. 1b is a schematic view of the stop mechanism of fig. 1 a. As shown in the figure, the electric valve comprises a driving shaft 01, a cover body 02, a valve body 03, a gear set 04, a valve rod 05 and a valve core 06, wherein the cover body 02 and the valve body 03 are fixed to form a cavity 07, the gear set 04 is positioned in the cavity, the driving shaft 01 can drive a gear of the gear set 04 to rotate, the gear of the gear set 04 can drive the valve rod 05 to rotate, and the valve rod 05 is in transmission connection with the valve core 06. The gear set 04 comprises a locating plate 041, a limit post 042 and a tail stage gear 043, wherein the upper end of the limit post 042 is connected with a mounting hole 0411 of the locating plate 041, the lower end of the limit post 042 is connected with a mounting hole of the valve body 03, and the tail stage gear 043 rotates within a range of 0-90 degrees through limit fit of the tail stage gear 043 and the limit post 042 in the structure so as to limit the rotation angle of the valve rod 05 and the valve core 06. In the stop structure, the positioning plate 041 is of a suspended structure and is not fixed with the cover 02, so that the stability of the limiting column 042 is affected. In view of this, how to improve the limit reliability of the tail gear 043 and the limit post 042 is a problem that needs to be improved by those skilled in the art.

Disclosure of Invention

The application aims to provide an electric valve, which comprises a shell part, a valve body part, a control part and a gear reduction mechanism, wherein the control part comprises a rotating shaft, the gear reduction mechanism comprises an input gear part and an output gear frame, the rotating shaft can drive the input gear part to circumferentially rotate, the output gear frame comprises a disc-shaped body part, and the disc-shaped body part is provided with a protruding part; the valve body part comprises a valve body, a blank of the valve body is made of a metal material in a forging or casting mode, the valve body is fixedly connected with a shell of the shell part, the valve body comprises a body part, an extending part, a platform part and a limiting boss, the extending part extends from the body part towards the control part, the platform part extends from one end, close to the control part, of the extending part radially outwards, the limiting boss is located above the platform part, and the protruding part can be matched with the limiting boss to limit the circumferential rotation stroke of the output gear frame.

The application provides an electric valve, an output gear frame comprises a disc-shaped body part, the disc-shaped body part is provided with a protruding part, a valve body comprises a platform part and a limiting boss, the limiting boss is positioned above the platform part, and the protruding part can be matched with the limiting boss to limit the circumferential rotation stroke of the output gear frame. The limiting boss is integrated on the valve body, and compared with the background technology, the limiting reliability of the output gear frame can be improved.

Drawings

Fig. 1a: a schematic cross-section of an electrically operated valve is given in the background art;

fig. 1b: a structural schematic diagram of an electric valve is given in the background art;

fig. 2: the application provides a section schematic diagram of an electric valve;

fig. 3: FIG. 2 is a schematic view of the valve body;

fig. 4: the application provides a structural schematic diagram of another valve body;

fig. 5: FIG. 2 is a schematic diagram illustrating the cooperation between the shaft and the input gear portion;

fig. 6: FIG. 2 is a schematic cross-sectional view of a spacer;

fig. 7: fig. 2 is a schematic diagram of the gear ring;

fig. 8: FIG. 2 is a schematic diagram of the output carrier;

fig. 9: FIG. 2 is a schematic view of the structure of the bearing member;

fig. 10: FIG. 2 is a schematic diagram of the mating of the ring gear, output carrier and bearing members;

fig. 11: FIG. 2 is a schematic cross-sectional view of a drive shaft;

fig. 12: the second output gear frame is structurally schematic;

fig. 13: the third output gear frame is provided with a structural schematic diagram;

fig. 14: the cooperation of the output gear carrier and the gear ring in fig. 13 is schematically shown;

fig. 15: the second electric valve is a schematic cross-sectional view;

fig. 16: FIG. 15 is a schematic cross-sectional view of a spacer;

fig. 17: the application provides a cross-section schematic diagram of a third electric valve.

Fig. 2 to 17:

1-a control part;

11-coil, 12/12B-rotor component;

13/13B-rotor, 130-rotor cavity;

14/14B-rotating shaft, 141/141B-shaft body;

15-driving plate, 151-base body, 152-plate body, 1521-side wall;

16/16A-spacer, 161-cup, 162-radial extension;

163-locating holes, 164-patio section, 165-support section;

17-bearing seats and 171-first blind holes;

2-gear reduction mechanism, 23-baffle plate and 231-through hole;

24-planetary gear mechanism, 241-input gear portion, 2410-axial through hole;

2411-large diameter portion, 2412-small diameter portion, 2413-input gear;

242-grooves, 2421-groove walls;

243-planetary gear carrier, 244-planetary gear and 245-positioning rod;

25-gear ring 253-limit groove;

26/26' -output carrier, 261-disc body portion;

262-hole, 263/263' -protuberance, 264-boss;

27-bearing member, 271-cylindrical portion, 272-extension portion, 273-axial through groove;

3-valve body part, 30-inner cavity of valve body part, 31/31A-valve body;

310-a rotation gap, 311-a body portion, 312-an extension;

3120-through holes, 313/313A-lands, 3131-steps;

314-limit boss and 315-concave part;

32-valve core, 321-groove, 33-valve seat;

34-a transmission shaft, 341-a first bonding part, 342-a second bonding part, 343-a second blind hole;

36-first connection pipe, 37-second connection pipe;

a 4-housing part, an inner cavity of the 40-housing part, a 401-annular receiving cavity;

41/41A/41B-housing;

411/411A-upper barrel, 412/412A-transition, 4121-inner bend;

413/413A-lower barrel, 414-straight barrel, 415-top, 416-detent.

Detailed Description

In order to better understand the aspects of the present application, the present application will be described in further detail with reference to the accompanying drawings and detailed description.

It should be noted that, the terms upper and lower are defined in fig. 2 to 17 by the positions of the components in the drawings and the positions of the components with respect to each other, and are only used for the sake of clarity and convenience in expressing the technical solutions. It should be understood that the use of directional terms herein should not be construed to limit the scope of the application as claimed.

In this context, "circumferential rotation" refers to a movement in the circumferential direction, and includes a movement within one rotation (360 °) and a movement within one rotation (360 °).

FIG. 2 is a schematic cross-sectional view of an electrically operated valve according to the present application; FIG. 3 is a schematic view of the valve body of FIG. 2; FIG. 4 is a schematic view of another valve body according to the present application; FIG. 5 is a schematic diagram illustrating the cooperation between the rotating shaft and the input gear portion in FIG. 2; FIG. 6 is a schematic cross-sectional view of the spacer of FIG. 2; FIG. 7 is a schematic view of the gear ring of FIG. 2; FIG. 8 is a schematic illustration of the structure of the output carrier of FIG. 2; FIG. 9 is a schematic view of the bearing assembly of FIG. 2; FIG. 10 is a schematic view of the mating of the ring gear, output carrier and bearing member of FIG. 2; fig. 11 is a schematic cross-sectional view of the drive shaft of fig. 2.

The electric valve includes a control member 1, a gear reduction mechanism 2, a valve body member 3, and a housing member 4. The valve cavity of the electrically operated valve includes an interior cavity 30 of the valve body member and an interior cavity 40 of the housing member.

The control unit 1 includes a coil 11 and a rotor unit 12. The rotor component 12 comprises a rotating shaft 14 and a rotor 13 fixedly connected with the rotating shaft 14, the rotating shaft 14 and the rotor 13 are positioned in an inner cavity 40 of the shell component, the coil 11 is positioned outside the shell component 4, and the rotor 13 is positioned above the gear reduction mechanism 2. The rotor 13 is made by sintering magnetic powder, the rod-shaped shaft body 141 of the rotating shaft 14 is made by processing stainless steel rod materials, and the rotor 13 is fixed to the shaft body 141 by a sintering process. A bearing seat 17 is provided above the inside of the housing member 4, the bearing seat 17 is provided with a first blind hole 171, and the upper end of the shaft body 141 is inserted into the first blind hole 171 to be positioned. The coil 11 is energized to drive the rotation shaft 14 to rotate circumferentially.

The gear reduction mechanism 2 is provided in an inner cavity 40 of the housing member. The gear reduction mechanism 2 includes an input gear portion 241 and an output carrier 26, and the rotating shaft 14 is flexibly connected to the input gear portion 241, where flexible connection means: the rotating shaft 14 and the input gear portion 241 which are connected with each other have a certain movable clearance, and the rotating shaft 14 can drive the input gear portion 241 to circumferentially rotate.

The valve body member 3 includes a valve body 31, a valve seat 33, a valve spool 32, and a transmission shaft 34. The blank of the valve body 31 is made of a metal material by forging or casting, and the valve body 31 and the valve seat 33 are fixed by welding to form the inner cavity 30 of the valve body part, but can also be fixed by screw connection. The valve body 31 is welded to the housing 41 of the housing member 4. The valve seat 33 is welded to the first connecting pipe 36, the valve body 31 is welded to the second connecting pipe 37, and one of the first connecting pipe 36 and the second connecting pipe 37 serves as a flow path inlet, and the other serves as a flow path outlet. The valve element 32 is substantially spherical and is provided in the inner chamber 30 of the valve body member. The valve body 31 includes a body portion 311 and an extension portion 312, and the extension portion 312 is formed to extend from a circumferential outer edge of the body portion 311 toward the control member 1. The protruding portion 312 includes a through hole 3120, the cross section of the through hole 3120 is circular, the transmission shaft 34 is substantially in a cylindrical rod shape, the transmission shaft 34 penetrates through the through hole 3120, one end of the transmission shaft 34 extends into the inner cavity 40 of the housing component and is connected with the hole portion 262 key groove of the output gear frame 26, the output gear frame 26 can drive the transmission shaft 34 to rotate circumferentially, the other end of the transmission shaft 34 extends into the inner cavity 30 of the valve body component and is connected with the groove 321 key groove of the valve core 32, and the transmission shaft 34 can drive the valve core 32 to rotate circumferentially.

In this embodiment, the blank of the valve body 31 is made of a metal material by forging or casting, the valve body 31 is fixedly connected with the housing 41, the valve body 31 is fixedly connected with the valve seat 33, the gear reduction mechanism 2 is disposed in the inner cavity 40 of the housing component, the valve core 32 is disposed in the inner cavity 30 of the valve body component, one end of the transmission shaft 34 extends into the hole 262 of the output gear frame 26 of the gear reduction mechanism 2, the output gear frame 26 can drive the transmission shaft 34 to rotate circumferentially, the other end extends into the groove 321 of the valve core 32, and the transmission shaft 34 can drive the valve core 32 to rotate circumferentially. The electric valve has the beneficial effects that the leakage risk of the electric valve can be reduced.

Further, as shown in fig. 2 and 3, the valve body 31 further includes a platform portion 313, the platform portion 313 is formed by extending radially outward from an end of the protruding portion 312 near the control member 1, a stepped portion 3131 with a stepped surface facing upward is provided on an outer periphery of the platform portion 313, the housing 41 is disposed on the stepped portion 3131, and the housing 41 is welded to the stepped portion 3131. The provision of the stepped portion has the advantage that the housing 41 and the valve body 31 are easily positioned when being welded, and the welding quality is improved.

Further, as shown in fig. 2, the housing 41 includes an upper barrel 411 and a lower barrel 413. The outer diameter of the upper cylinder 411 is smaller than that of the lower cylinder 413, the upper cylinder 411 and the lower cylinder 413 are respectively made of stainless steel plates by stretching, and the upper cylinder 411 and the lower cylinder 413 are fixed by welding to form the housing 41. The wall thickness of the upper barrel 411 is smaller than the wall thickness of the lower barrel 413. The rotor 13 of the rotor member 12 is positioned in the inner cavity of the upper cylinder 411, and the coil 11 is fitted around the outer periphery of the upper cylinder 411. The lower barrel 413 includes an inwardly bent transition portion 412, the transition portion 412 includes an inwardly bent portion 4121, the inwardly bent portion 4121 extends downward from one end of the transition portion 412 in the axial direction, the inwardly bent portion 4121 is welded to the upper barrel 411, and the lower barrel 413 is welded to the step 3131 of the platform 313. The wall thickness of the upper cylinder 411 is smaller than that of the lower cylinder 413, and the wall thickness of the upper cylinder 411 is thinner, so that the magnetic flux is improved, the driving efficiency of the coil 11 is improved, and the energy consumption is reduced; the thickness of the wall of the lower tube 413 is thicker, which is beneficial to increasing the compressive strength and prolonging the service life, and is not easy to damage even if the lower tube is impacted by stronger coolant.

As shown in fig. 5, the rotation shaft 14 includes a shaft body 141 having a rod shape and a transmission plate 15 fixedly provided at a lower end portion of the shaft body 141, the transmission plate 15 includes a base body portion 151 and a plate body portion 152 extending radially outward from the base body portion 151, the base body portion 151 and the shaft body 141 are fixed by clamping or welding, and the plate body portion 152 includes a side wall portion 1521. The input gear portion 241 has a groove 242 at an upper end thereof and an input gear 2413 at a lower end thereof, and the input gear 2413 meshes with the planetary gears 244 of the gear reduction mechanism 2. The plate 152 at least partially extends into the groove 242, the groove 242 includes a groove wall 2421 capable of abutting against the sidewall 1521, and a predetermined circumferential movement space is provided between the groove wall 2421 and the sidewall 1521. The rotation shaft 14 rotates, and the side wall portion 1521 of the plate 152 abuts against the groove wall portion 2421 of the groove 242, thereby driving the input gear portion 241 to rotate circumferentially. By arranging a circumferential movement gap between the plate body 152 of the transmission plate 15 and the groove 242, so that the transmission plate 15 and the groove 242 are flexibly connected, the processing precision of the transmission plate 15 and the groove 242 and the control precision of assembly can be reduced, thereby reducing the manufacturing cost and improving the qualification rate of assembly.

Further, as shown in fig. 2, 5 and 12, in the present embodiment, the gear reduction mechanism 2 is a planetary gear mechanism 24, and the planetary gear mechanism 24 includes the input gear portion 241, the output gear carrier 26, the partition 23, the gear ring 25, the planetary gear carrier 243, the planetary gear 244 and the positioning rod 245. The planetary gear carrier 243 and the planetary gears 244 are provided in the inner cavity of the gear ring 25. The positioning rod 245 penetrates the planetary gear carrier 243, and its upper end extends into the axial through hole 2410 of the input gear portion 241, and its lower end extends into the second blind hole 343 of the transmission shaft 34. This arrangement is advantageous in improving the stability of the operation of the planetary gear mechanism 24 and reducing the risk of seizure.

The gear ring 25 is made of metal powder by sintering, the gear ring 25 is fixedly connected with the partition plate 23, and teeth are arranged on the inner wall of the gear ring 25 and meshed with the planetary gears 244. The input gear 241 includes a large diameter portion 2411 and a small diameter portion 2412, the groove 242 is provided in the large diameter portion 2411, and the input gear 2413 is provided in the small diameter portion 2412. The large diameter portion 2411 is placed on the partition plate 23, and the small diameter portion 2412 penetrates the through hole 231 of the partition plate 23.

Further, as shown in fig. 2 and 6, the control unit 1 further includes a positioning frame 16. The spacer 16 is generally in the shape of an inverted cup including a patio 164 and a cylindrical support 165. The patio 164 includes a positioning hole 163, the shaft body 141 of the rotation shaft 14 penetrates the positioning hole 163, and the supporting portion 165 is welded to the upper barrel 411 of the housing 41. The rotor assembly 12 is rotated smoothly by positioning the lower end of the shaft body 141 through the positioning hole 163.

As shown in fig. 2, the transmission shaft 34 penetrates through the through hole 3120 of the protruding portion 312, and the bearing member 27 is provided between the wall of the through hole 3120 and the transmission shaft 34. The bearing member 27 is made of a wear-resistant metal material powder metallurgy. The beneficial effect of this arrangement is that wear of the drive shaft 34 in the circumferential rotation process is reduced, and the service life of the drive shaft 34 is prolonged.

As shown in fig. 2, 8 and 11, one end of the drive shaft 34 facing the control member 1 includes a first bonding portion 341 bonded to the hole portion 262 of the output carrier 26, the first bonding portion 341 is located in the inner cavity 40 of the housing member, the cross section of the first bonding portion 341 is non-circular, and the first bonding portion 341 extends into the hole portion 262 of the output carrier 26; the other end of the drive shaft 34 includes a second key 342 that is keyed to the valve core 32. The second key 342 is located in the interior cavity 30 of the valve body member, the lower end of the second key 342 extends into the slot 321 of the valve core 32. The second key 342 mates with the key of the valve core 32.

It is contemplated that fluid may flow from the interior cavity 30 of the valve body member into the interior cavity 40 of the housing member through the rotational gap 310 between the outer peripheral wall of the drive shaft 34 and the inner peripheral wall of the bearing member 27, as shown in fig. 2. Therefore, the internal circulation of the electric valve can be enhanced, the heat of the gear reduction mechanism is dissipated, and the service life of the gear reduction mechanism is prolonged.

As shown in fig. 7, 8, 9 and 10, in the present embodiment, a limiting groove 253 is provided at the lower end of the gear ring 25. The output carrier 26 includes a disk-shaped body portion 261, a hole portion 262 is provided in the disk-shaped body portion 261, the cross section of the hole portion 262 is non-circular, and a protruding portion 263 is provided on a side of the disk-shaped body portion 261 facing the spool 32. In the present embodiment, the bearing member 27 includes a cylindrical portion 271 and an extending portion 272 extending radially outward from an outer edge of the cylindrical portion 271, the cylindrical portion 271 includes an axial through groove 273, and the axial through groove 273 communicates the inner chamber 40 of the housing member and the inner chamber 30 of the valve body member; the outer end edge of the extension 272 is welded to the inner wall of the lower tube 413 of the housing 41. One end of the extension portion 272 away from the cylindrical portion 271 is engaged with the key groove of the limit groove 253, and the other end of the extension portion 272 is engaged with the projection 263 to limit the circumferential rotation stroke of the output carrier 26.

In this embodiment, since the extension portion 272 of the bearing member 27 is fixed to the lower cylindrical portion 413 of the housing 41 by welding, on one hand, the extension portion 272 is engaged with the key groove of the limiting groove 253 of the gear ring 25, so that the gear ring 25 is limited in the circumferential direction, and on the other hand, the extension portion 272 is used to limit the protrusion 263, so as to limit the circumferential rotation stroke of the output gear frame 26, that is, limit the circumferential rotation stroke of the transmission shaft 34, so that the fully open position and the fully closed position of the valve core 32 can be limited, and the fully open, fully closed and flow regulating functions of the electric valve can be realized.

Further, the number of the protrusions 263 is 2, and the protrusions are symmetrically arranged with respect to the central axis of the hole 262, which is beneficial to the stable circumferential rotation and reliable limitation of the output gear frame 26. And, protruding portion 263 and disk-shaped body portion 261 are through plastics integrated injection molding or through metal powder metallurgy integrated molding, are favorable to reinforcing the intensity of output gear frame 26, make spacing more reliable.

Of course, the limiting method is not limited thereto. As a modification of the valve body, as shown in fig. 4, the valve body 31A further includes a stopper boss 314, and the stopper boss 314 is located above the platform portion 313A. Specifically, the two limiting bosses 314 are symmetrically disposed with respect to the central axis of the through hole 3120, and a recess 315 is formed between the two limiting bosses 314, the recess 315 is located in a circumferential space between the two limiting bosses 314, and the protrusion 263 is disposed in the recess 315 and can limit the circumferential rotation stroke of the output gear carrier 26. In the present embodiment, the stopper boss 314 is integrated with the valve body 31A, and no special processing of the bearing member is required, and the number of processing steps is reduced.

Fig. 12 is a schematic view showing the structure of a second output carrier according to the present application. In the present embodiment, the lower end periphery of the gear ring 25 is welded to the lower cylindrical portion 413 of the housing 41, the circumferential periphery of the disc-shaped body portion 261 is provided with the projection 263', and the limit groove 253 cooperates with the projection 263' to limit the circumferential rotation stroke of the output carrier 26. By this arrangement, the limit groove 253 of the gear ring 25 limits the circumferential rotation travel of the output gear frame 26, and can limit the fully open and fully closed positions of the valve core 32, thereby realizing the fully open, fully closed and flow regulating functions of the electric valve. In this embodiment, no special processing of the bearing member is required, and the processing steps are reduced.

FIG. 13 is a schematic view of a third output carrier according to the present application; fig. 14 is a schematic diagram showing the cooperation of the output carrier and the gear rim in fig. 13.

In this embodiment, the output carrier 26' further includes a boss 264, and the boss 264 is provided on a side of the disc-shaped body portion 261 facing the ball valve spool 32. The boss 264 and the protruding portion 263' are integrally connected, and the protruding portion 263', the boss 264 and the disc-shaped body 261 are integrally injection molded through plastics or integrally molded through metal powder metallurgy, so that the strength of the output gear frame 26' is enhanced, and the limit is more reliable.

FIG. 15 is a schematic view of a second electrically operated valve according to the present application; fig. 16 is a schematic cross-sectional view of the spacer of fig. 15.

As a modification, as shown in fig. 15, a structure of a housing 41A and a positioning frame 16A is different from the above-described embodiment. The case 41A is integrally drawn from a metal material. The housing 41A includes an upper barrel 411A, a lower barrel 413A, and a transition portion 412A connecting the upper barrel 411A and the lower barrel 413A. The outer diameter of upper barrel 411A is smaller than the outer diameter of lower barrel 413A, and the wall thickness of upper barrel 411A is smaller than the wall thickness of lower barrel 413A and transition portion 412A. The rotor 13 of the rotor member 12 is positioned in the inner cavity of the upper tube 411A, and the coil 11 is fitted around the outer periphery of the upper tube 411A. The lower cylindrical portion 413A is welded to the stepped portion 3131 of the platform portion 313. The wall thickness of the upper cylinder 411A is smaller than that of the lower cylinder 413A and the transition part 412A, and the wall thickness of the upper cylinder 411A is set thinner, so that the magnetic flux is improved, the driving efficiency of the coil 11 is improved, and the energy consumption is reduced; the thickness of the wall of the lower tube 413A and the transition portion 412A is thicker, which is advantageous in increasing the compressive strength and improving the service life, and is not easy to damage even if receiving a strong impact force of the refrigerant.

As shown in fig. 16, in the present embodiment, the spacer 16A includes a cup portion 161 and a radially outward extending portion 162 extending radially outward from a lower end of the cup portion 161. The cup-shaped portion 161 includes a positioning hole 163, and the shaft body 141 of the rotating shaft 14 penetrates the positioning hole 163, and the radially extending portion 162 is welded to the transition portion 412A of the housing 41A. The rotor assembly has the advantages that the lower end of the shaft body 141 is positioned through the positioning hole 163, and the running stability of the rotor assembly 12 is improved.

Fig. 17 is a schematic structural diagram of a third electrically operated valve according to the present application.

As a modification, as shown in fig. 17, a structure of a housing 41B is different from the above-described embodiment. The case 41B is integrally drawn from a metal material. The housing 41B includes a straight barrel portion 414 and a top portion 415, the outer diameter of the straight barrel portion 414 being substantially equal, the top portion 415 including a detent 416. The straight tube portion 414 is welded to the stepped portion 3131 of the platform portion 313. The housing 41B of this embodiment has a simple structure and is convenient to process as compared with the above-described example. In addition, in the present embodiment, the rotor part 12B includes the rotor 13B and the rotating shaft 14B, the outer diameter of the rotor 13B is increased, and the output torque of the control part 1 is improved by increasing the arm length of the rotor 13B, so the present embodiment can be applied to an occasion requiring large-caliber flow adjustment; the upper end of the shaft body 141B of the rotating shaft 14B extends into the positioning groove 416, and the lower end extends into the axial through hole 2410 of the input gear portion 241, so as to position the rotating shaft 14B, and improve the running stability of the rotor component 12B.

The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims

1. The electric valve comprises a shell part, a valve body part, a control part and a gear reduction mechanism, wherein the control part comprises a rotating shaft, the gear reduction mechanism comprises an input gear part and an output gear frame, the rotating shaft can drive the input gear part to circumferentially rotate, the output gear frame comprises a disc-shaped body part, and the disc-shaped body part is provided with a protruding part;

the valve body part comprises a valve body, a blank of the valve body is made of a metal material in a forging or casting mode, the valve body is fixedly connected with a shell of the shell part, the valve body comprises a body part, an extending part, a platform part and a limiting boss, the extending part extends from the body part towards the control part, the platform part extends from one end, close to the control part, of the extending part radially outwards, the limiting boss is located above the platform part, and the protruding part can be matched with the limiting boss to limit the circumferential rotation stroke of the output gear frame.

2. The electrically operated valve of claim 1 wherein said limit bosses include two recesses formed therebetween, said protrusions being disposed in said recesses to limit the circumferential rotational travel of said output carrier.

3. The electrically operated valve of claim 1, further comprising a bearing member, said bearing member comprising a cylindrical portion, said cylindrical portion comprising an axial through slot, said axial through slot communicating an interior cavity of said housing member with an interior cavity of said valve body member, said extension portion comprising a through bore, said cylindrical portion being located in said through bore.

4. The electric valve according to claim 1, wherein the valve body is provided with a stepped portion with a stepped surface facing upward, the housing is disposed in the stepped portion, the housing is welded and fixed with the stepped portion, the housing includes an upper cylindrical portion and a lower cylindrical portion, the upper cylindrical portion and the lower cylindrical portion are respectively made of stainless steel sheet materials by stretching, the upper cylindrical portion is welded and fixed with the lower cylindrical portion, and the lower cylindrical portion is welded and fixed with the stepped portion.

5. The electrically operated valve of claim 4 wherein said housing includes an upper barrel portion, a lower barrel portion, said upper barrel portion and said lower barrel portion being secured by welding, said upper barrel portion having an outer diameter less than an outer diameter of said lower barrel portion, said upper barrel portion having a wall thickness less than a wall thickness of said lower barrel portion, said rotor being disposed within said upper barrel portion, said control member further including a coil disposed outside said upper barrel portion, said lower barrel portion including an inwardly bent transition portion including an inwardly bent portion extending axially downwardly from an end of said transition portion, said inwardly bent portion being secured by welding with said upper barrel portion, said lower barrel portion being secured by welding with said valve body.

6. The electrically operated valve of claim 1 further comprising a spacer, said spacer being generally inverted cup-shaped, said spacer comprising a patio and a cylindrical support, said patio comprising a locating aperture, said spindle extending through said locating aperture.

7. The electrically operated valve of any one of claims 1-6, wherein said control member further comprises a rotor fixedly connected to said shaft, said rotor and said shaft being located within said housing member cavity, said rotor being located above said gear reduction mechanism.

8. The electric valve according to any one of claims 1 to 6, wherein the rotary shaft includes a shaft body, a transmission plate fixedly connected to a lower end of the shaft body, the transmission plate includes a base body portion fixedly connected to the lower end of the shaft body and a plate body portion extending outwardly from the base body portion, the plate body portion includes a side wall portion, the input gear portion includes a large diameter portion and a small diameter portion, the large diameter portion is provided with a groove, the plate body portion is at least partially located in the groove, the groove includes a groove wall portion capable of abutting against the side wall portion, and a circumferential movement gap is provided between the groove wall portion and the side wall portion.