CN115199774A - Electric valve - Google Patents

Abstract

The valve body assembly is provided with a valve body cavity, the valve part comprises a first positioning hole and a second positioning hole, the valve rod comprises a first positioning part, the valve body assembly is also provided with a second positioning hole, at least part of the first positioning part is positioned in the first positioning hole, when the valve part is connected with the valve body assembly, at least part of the second positioning part is positioned in the valve body cavity, the second positioning part is abutted against the side wall forming the valve body cavity, part of the positioning column is positioned in the second positioning hole, the positioning column is abutted against the peripheral side wall forming the second positioning hole, the valve core is positioned in the valve body cavity, the valve core is provided with a third positioning hole, and part of the positioning column is positioned in the third positioning hole.

Description

Electric valve

Technical Field

The present application relates to an electrically operated valve.

Background

The electric valve can be applied to a vehicle refrigerant circulating system and comprises a valve rod and a valve core, the valve rod is in transmission connection with the valve core and can drive the valve core to rotate, and the electric valve controls the on-off or switching of fluid through the rotation of the valve core. How to guarantee the coaxiality requirement of the valve rod and the valve core in the transmission process and improve the stability of the electric valve is a technical problem to be solved.

Disclosure of Invention

The utility model provides an aim at provides an motorised valve is favorable to guaranteeing the axiality requirement of valve rod and case in transmission process, improves the stability of motorised valve.

In order to achieve the purpose, the following technical scheme is adopted in the application:

an electrically operated valve comprises a valve component, a valve body component, a valve rod and a valve core, wherein the valve body component is provided with a valve body cavity, the valve core is positioned in the valve body cavity, one end of the valve rod is in transmission connection with the valve component, the other end of the valve rod is in transmission connection with the valve core, the valve component is connected with the valve body component, the valve component is provided with a first positioning hole, the valve rod comprises a first positioning part, and at least part of the first positioning part is positioned in the first positioning hole; the valve component further comprises a second positioning part, at least part of the second positioning part is positioned in the valve body cavity, and the second positioning part is abutted with the side wall forming the valve body cavity; the valve body assembly is provided with a second positioning hole which is formed by inwards recessing from the bottom wall forming the valve body cavity along the axial direction of the valve body cavity, the electric valve further comprises a positioning column, part of the positioning column is positioned in the second positioning hole, and part of the positioning column is abutted against the peripheral side wall forming the second positioning hole; the valve core is provided with a third positioning hole, and part of the positioning column is positioned in the third positioning hole.

The application provides an electric valve, which comprises a valve component, a valve rod, a valve body component, a valve core and a positioning column, wherein the valve body component is provided with a valve body cavity, the valve component comprises a first positioning hole and a second positioning hole, the valve rod comprises a first positioning part, the valve body component is also provided with a second positioning hole, at least part of the first positioning part is positioned in the first positioning hole, when the valve component is connected with the valve body component, at least part of the second positioning part is positioned in the valve body cavity, the second positioning part is abutted against the side wall forming the valve body cavity, part of the positioning column is positioned in the second positioning hole, the positioning column is abutted against the side wall forming the second positioning hole, the valve core is positioned in the valve body cavity, the valve core is provided with a third positioning hole, and part of the positioning column is positioned in the third positioning hole.

Drawings

Figure 1 is a cross-sectional structural schematic of an example of an embodiment of an electrically operated valve;

FIG. 2 is a schematic cross-sectional view of the valve member of FIG. 1;

FIG. 3 is a perspective view of the connecting base;

FIG. 4 is a perspective view of the stationary ring gear;

FIG. 5 is a cross-sectional structural view of the valve body assembly of FIG. 1;

FIG. 6 is a perspective schematic view of the valve body assembly;

FIG. 7 is a schematic view of an exploded structure of the seal assembly;

FIG. 8 is a perspective view of the valve cartridge;

figure 9 is a schematic view of yet another cross-sectional configuration of the electrically operated valve of figure 1;

FIG. 10 is a perspective view of the output carrier and valve stem;

FIG. 11 is a cross-sectional view of the connector holder of FIG. 3;

FIG. 12 is a cross-sectional schematic view of the cartridge of FIG. 8;

fig. 13 is a partially enlarged view of a portion a in fig. 9.

Detailed Description

The application is further described with reference to the following figures and specific examples:

referring to fig. 1, the electrically operated valve may be applied to a vehicle thermal management system or an air conditioning system, and particularly may be applied to a circulating flow path of a high-pressure fluid such as a refrigerant, wherein the vehicle thermal management system includes a new energy vehicle thermal management system. The electric valve 100 comprises a driving part 1, a valve part 2, a valve body assembly 3 and a valve core 4, wherein the valve body assembly 3 is provided with a valve body cavity 30, the valve part 2 comprises a valve rod 21, the valve core 4 is positioned in the valve body cavity 30, the valve part 2 is in transmission connection with the valve core 4 through the valve rod 21, the valve part 2 is fixedly connected with the valve body assembly 3, the driving part 1 is positioned on the periphery of part of the valve part 2, the driving part 1 is fixedly connected with the valve body assembly 3, and the electric valve 100 is electrically connected with the outside and/or in signal connection through the driving part 1.

Referring to fig. 1, the driving component 1 includes an outer casing 11, a stator assembly 12, a circuit board 13, an interface portion 14, a first pin 15 and a second pin 16, where the outer casing 11 and the interface portion 14 may be fixed by integral injection molding or by assembly connection, and in this embodiment, the outer casing 11 and the interface portion 14 are integrally injection molded. The outer housing 11 is formed with a housing cavity 110, the stator assembly 12 and the circuit board 13 are located in the housing cavity 110, the stator assembly 12 is located at a part of the outer circumference of the valve member 2, one end of the first pin 15 is electrically and/or signal connected with the stator assembly 12, and the other end of the first pin 15 is electrically and/or signal connected with the circuit board 13. The second pin 16 is connected and fixed with the interface part 14, specifically, in this embodiment, a middle portion of the second pin 16 is fixed with a housing of the interface part 14 by injection molding, one end of the second pin 16 is located in the housing cavity 110 and is electrically connected and/or signal connected with the circuit board 13, and the other end of the second pin 16 is located in a socket cavity formed by the interface part 14 and is used for electrically connecting and/or signal connecting with the outside. In this embodiment, the driving component 1 and the valve body assembly 3 are fixed by a screw, and further, a sealing arrangement is further provided between the driving component 1 and the valve body assembly 3, which is beneficial to preventing water vapor or other impurities in the outside air from entering the housing cavity 110 and contacting the stator assembly 12, thereby avoiding corrosion or failure of the stator assembly 12.

Referring to fig. 2, the valve component 2 further includes a rotor assembly 22, a transmission assembly 23, a connecting seat 24, and a sleeve 25, where the sleeve 25 is fixedly connected to the connecting seat 24, in this embodiment, the sleeve 25 is fixedly welded to the connecting seat 24, the sleeve 25 is assembled to the connecting seat 24 to form a receiving cavity 250, the rotor assembly 22 and at least a portion of the transmission assembly 23 are located in the receiving cavity 250, and the rotor assembly 22 is located at an outer periphery of a portion of the transmission assembly 23, or a portion of the transmission assembly 23 is located in a rotor cavity formed by the rotor assembly 22, which is beneficial to reducing an axial height of the electric valve 100.

Referring to fig. 2 to 4, the rotor assembly 22 includes a rotor 221 and a connecting member 222, the transmission assembly 23 includes a fixed shaft 231, a sun gear 232, a fixed gear ring 233, a planetary gear assembly 234 and an output gear assembly 235, the transmission assembly 23 may be provided with multiple stages of planetary gear assemblies 234 according to the requirement of the transmission ratio, and in this embodiment, the transmission assembly 23 includes a first planetary gear assembly 2341, a second planetary gear assembly 2342 and a third planetary gear assembly 2343 in sequence along the axial direction of the transmission assembly 23. The rotor 221 is connected and fixed to the connecting member 222, specifically, the connecting member 222 may be an injection insert, the rotor is formed by injection molding, the sun gear 232 is located on the outer periphery of the fixed shaft 231, and the sun gear 232 is connected and fixed to the connecting member 222. The fixed gear ring 233 is located at the periphery of at least part of the sun gear 232, the planet gear assembly 234 and at least part of the output gear assembly 235, the fixed gear ring 233 is fixedly connected with the connecting seat 24, in this embodiment, the fixed gear ring 233 is fixedly connected with the connecting seat 24 by riveting, specifically, referring to fig. 3, the connecting seat 24 includes a riveting portion 241 and a step portion 242, in the radial direction of the connecting seat 24, the step portion 242 is formed by protruding from the inner peripheral wall of the connecting seat 24 to a direction away from the inner peripheral wall, the riveting portion 241 is connected with the step portion 242 by the inner peripheral wall of the connecting seat 24, the number of the riveting portion 241 and the number of the step portion 242 may be plural respectively, the riveting portion 241 and the step portion 242 may be distributed at equal circumferential intervals in the circumferential direction of the connecting seat 24, and a third limiting groove 243 is provided between two adjacent riveting portions 241 and two step portions 242. Referring to fig. 4, the fixed gear 233 includes a first flange portion 2331, the first flange portion 2331 is formed to protrude from the outer circumferential wall of the fixed gear 233 in a direction away from the outer circumferential wall in a radial direction of the fixed gear 233, the fixed gear 233 further includes a third stopper portion 2332 which is engaged with the third stopper groove 243 in a stopper manner, the third stopper portion 2332 is formed to protrude from the outer circumferential wall of the first flange portion 2331 in a direction away from the outer circumferential wall in the radial direction of the fixed gear 233, the number of the third stopper portions 2332 may be equal to the number of the third stopper grooves 243, and the third stopper portions 2332 may be distributed at equal circumferential intervals along the outer circumferential wall of the first flange portion 2331. When the fixed ring gear 233 is fixedly coupled to the coupling holder 24, at least a portion of the third stopper 2332 is positioned in a cavity formed by the third stopper groove 243 to limit the circumferential rotation of the fixed ring gear 233, and the first flange 2331 abuts against the step 242 to bend the rivet 241 so that the first flange 2331 is pressed between the rivet 241 and the step 242, thereby achieving the rivet fixation of the fixed ring gear 233 and the coupling holder 24.

Referring to fig. 2, the first planetary gear set 2341 is located at the outer periphery of the fixed shaft 231, and the first planetary gear set 2341 is in gear engagement with the sun gear 232 and the fixed ring gear 233, respectively. The second planetary wheel assembly 2342 is located at the outer periphery of the fixed shaft 231, and the second planetary wheel assembly 2342 is located farther from the sun gear 232 than the first planetary wheel assembly 2341 in the axial direction of the fixed shaft 231, and the second planetary wheel assembly 2342 is in gear engagement with the first planetary wheel assembly 234 and the fixed ring gear 233, respectively. The third planetary gear set 2343 is located on the outer periphery of the fixed shaft 231, and in the axial direction of the fixed shaft 231, the third planetary gear set 2343 is located farther from the sun gear 232 than the second planetary gear set 2342, and the third planetary gear set 2343 is in gear engagement with the second planetary gear set 2342 and the fixed gear ring 233, respectively. The output gear assembly 235 includes an output frame 2351, the output frame 2351 has a positioning hole fitted with the fixed shaft 231, one end of the fixed shaft 231 is located in the positioning hole, the output gear assembly 235 is located at the outer periphery of the fixed shaft 231, the output gear assembly 235 is located farther from the sun gear 232 than the third planetary gear assembly 2343 along the axial direction of the fixed shaft 231, and the output gear assembly 235 is respectively in gear engagement with the third planetary gear assembly 2343 and the fixed gear ring 233. The valve rod 21 and the output frame 2351 can be in transmission connection through integral forming or assembly fixing or assembly limiting, in the embodiment, the valve rod 21 and the output frame 2351 are integrally formed, the output frame 2351 is positioned in the accommodating cavity 250, the output frame 2351 is abutted against the connecting seat 24, and at least part of the valve rod 21 is positioned outside the accommodating cavity 250 and is in transmission connection with the valve core 4. The fixed shaft 231 is arranged, so that the coaxiality requirement of the sun gear 232, the planet gear assembly 234 and the output gear assembly 235 in the gear transmission process can be guaranteed. Of course, as another embodiment, the transmission assembly 21 may not include the fixed shaft 231, that is, the transmission assembly 21 may ensure the coaxiality requirement of the sun gear 232, the planet gear assembly 234 and the output gear assembly 235 during the gear transmission process by meshing with the fixed gear ring 233.

Referring to fig. 1, 5 and 6, the valve body assembly 3 includes an opening portion 31, the opening portion 31 forming an opening chamber 32, the opening chamber 32 communicating with the valve body chamber 30 with respect to the individual components of the valve body assembly 3. The valve core 4 is located in the valve body cavity 30, part of the valve part 2 is located in the opening cavity 32, at least part of the valve rod 21 extends into the valve body cavity 30 to be in transmission connection with the valve core 4, the valve part 2 is fixedly connected with the valve body assembly 3, in the embodiment, the valve part 2 and the valve body assembly 3 are fixedly pressed through the compression nut 5, specifically, referring to fig. 6, the opening part 31 comprises a first step surface 311 and a side wall surface 312, the first step surface 311 is connected with the side wall surface 312, the side wall surface 312 is connected with the first step surface 311, the side wall surface 312 is closer to an opening of the opening cavity 32 than the step surface 311 in the axial direction of the opening cavity 32, and the side wall surface 312 is provided with an internal thread section. In this embodiment, the opening portion 31 further includes a second limiting groove 313, the second limiting groove 313 is formed by inward recessing from the side wall surface 312 along the radial direction of the opening cavity 32, the number of the second limiting grooves 313 may be multiple, in this embodiment, the number of the second limiting grooves 313 is 2, and the second limiting grooves are distributed at equal circumferential intervals along the side wall surface 312 of the opening portion. Referring to fig. 3, the connecting seat 24 further includes a second flange portion 244, the second flange portion 244 is formed by protruding from the outer circumferential wall of the connecting seat 24 in a direction away from the outer circumferential wall in a radial direction of the connecting seat 24, the connecting seat 24 further includes a second limiting portion 245, the second limiting portion 245 is formed by protruding from the outer circumferential wall of the second flange portion 244 in a direction away from the outer circumferential wall, the number of the second limiting portions 245 may be equal to the number of the second limiting grooves 313, and the second limiting portions 245 may also be distributed at equal intervals along the outer circumferential wall of the second flange portion 244. When the valve member 2 is connected with the valve body assembly 3, at least part of the connecting seat 24 is located in the open cavity 32, at least part of the second limiting part 245 is located in a groove cavity formed by the second limiting groove 313 and used for limiting the circumferential rotation of the connecting seat 24, the second flange part 244 abuts against the first stepped surface 311, the compression nut 5 is located on the periphery of part of the connecting seat 24, an external thread section is arranged on the outer peripheral surface of the compression nut 5, the compression nut 5 is rotated, and the compression nut 5 is in threaded fit with the side wall surface 312 of the opening part, so that the second flange part 244 is compressed between the compression nut 5 and the first stepped surface 311, and the connection and fixation of the valve member 2 and the valve body assembly 3 are realized. Further, a sealing arrangement is arranged between the valve component 2 and the valve body assembly 3, so that leakage of the mode fluid from an assembly gap between the valve component 2 and the valve body assembly 3 is facilitated.

Referring to fig. 1 and 7, the valve body assembly 3 further has a plurality of passages, which in this embodiment include a first passage 33 and a second passage 34. The electric valve 100 further includes a sealing assembly 6, the sealing assembly 6 includes a sealing seat 61, a sealing element 62 and an elastic element 63, in this embodiment, the elastic element 63 is a wave spring, but as another embodiment, the elastic element 63 may also be another element having elasticity, such as a spring. The seal holder 61 includes a groove portion 611 and an arc surface 612, the groove portion 611 is formed by inward recess from the outer surface of the seal holder 61 along the radial direction of the seal holder 61, the arc surface 612 is formed by extending from the main body portion 613 of the seal holder 61 to both sides along the axial direction of the seal holder 61, and at least a part of the arc surface 612 can be attached to the outer surface of the valve element 4. In this embodiment, the valve element 4 is a cylindrical valve element, but as another embodiment, the valve element 4 may be spherical, spheroidal, conical, or the like, and the valve element 4 may be cylindrical, which is more advantageous for facilitating the forming of the valve element 4 than the valve element being spherical. At least part of the sealing assembly 6 is located in the valve body cavity 30, the sealing assembly 6 is located on two sides of the valve core 4, and the valve core 4 is sealed, specifically, in the embodiment, part of the sealing assembly 6 is located in the valve body cavity 30, part of the sealing assembly 6 is located in the channel, at least part of the arc-shaped surface 612 is attached to the outer surface of the valve core 4, and the valve core 4 can be in sliding fit with the arc-shaped surface 612; the elastic member 63 is located on the outer periphery of the partial seal holder 61, the elastic member 63 is pressed between the side wall forming the valve body chamber 30 and the end face of the main body portion 613, and the elastic member 63 is in an elastically pressed state; part of the seal member 62 is located in the groove cavity formed by the groove portion 611, the seal member 62 is compressed between the wall surface forming the channel and the groove portion 61 in the radial direction of the channel, the seal member 62 is in a seal compressed state, and the seal member 62 is located farther from the spool 4 than the elastic member 63 in the axial direction of the channel. The elastic piece 63 is arranged, so that on one hand, the arc-shaped surface 612 is tightly attached to the outer surface of the valve core 4, sealing is reliable, on the other hand, abrasion gaps of the arc-shaped surface caused by long-term frequent sliding between the valve core 4 and the arc-shaped surface 612 are compensated, and sealing performance is guaranteed.

Referring to fig. 1, 2 and 7, the seal holder 61 further includes a through hole 614, the through hole 614 being disposed through the seal holder 61, the through hole 614 being in communication with the passage. The valve element 4 also has a through bore 41. The electric valve 100 works on the following principle: after the driving component 1 is powered on, the stator component 12 generates an excitation magnetic field, the rotor component 22 can drive the sun gear 232 to rotate under the excitation of the magnetic field, the sun gear 232 drives the output gear component 235 to rotate through the planet gear component 234, the output frame 2351 and the valve rod 21 are integrally formed, namely, the output gear component 235 drives the valve rod 21 to rotate through the output frame 2351, the valve rod 21 extends into the valve body cavity 30 to be in transmission connection with the valve core 4, the valve rod 21 drives the valve core 4 to rotate, and along with the rotation of the valve core 4, the pore passage 41 of the valve core 4 can be communicated or not communicated with the first channel 33 and the second channel 34, so that the on-off of the electric valve 100 to the fluid is realized. In order to simplify the assembly of the electric valve, in the present embodiment, the valve rod 21 is in transmission connection with the valve core 4 through limit fitting, specifically, referring to fig. 8 and 9, the valve core 4 includes a first limit groove 42, along an axial direction of the valve core 4, the first limit groove 42 is formed by recessing from an upper end surface of the valve core 4 inwards, defining the axial direction of the valve core 4, an end surface of the valve core 4 close to the transmission assembly 23 is an upper end surface, and an end surface of the valve core 4 far away from the transmission assembly 23 is a lower end surface. The valve rod 21 comprises a first limiting portion 211 matched with the first limiting groove 42, the first limiting portion 211 is a non-rotating body, at least part of the first limiting portion 211 is located in a groove cavity formed by the first limiting groove 42, when the valve rod 21 rotates, the first limiting portion 211 can be in limiting fit with the first limiting groove 42 to limit the valve rod 21 to rotate relative to the valve core 4, and therefore under the driving of an excitation magnetic field, under the condition that the coaxiality of the valve rod 21 and the valve core 4 is good, the valve rod 21 can drive the valve core 4 to rotate together.

Referring to fig. 1, since high-pressure fluid such as refrigerant has high pressure, when flowing through the electric valve 100, along the radial direction of the valve core 4, the high-pressure fluid may directly or indirectly apply pressure to the valve core 4, so that the valve core 4 may be inclined or excessively offset relative to the valve rod 21 under the action of the pressure, that is, the requirement for coaxiality between the valve rod 21 and the valve core 4 cannot be ensured, and thus the situation that the valve core 4 is directly clamped by the sealing assembly 6 or the valve rod 21 cannot drive the valve core 4 to rotate may occur, thereby affecting the stability of the electric valve 100.

In order to solve the above problem and ensure the coaxiality requirement of the valve rod 21 and the valve core 4 during the operation process, referring to fig. 1 and fig. 9 to fig. 11, the connecting seat 24 further comprises a first positioning hole 246, the first positioning hole 246 is arranged to penetrate through the connecting seat 24, the central axis of the first positioning hole 246 is coincident or tends to coincide with the reference central axis of the connecting seat 24 during the machining process, and specifically, the allowable offset of the central axis of the first positioning hole 246 relative to the reference central axis of the connecting seat 24 is set to be less than 0.02mm. The valve rod 21 further includes a first positioning portion 212, the first positioning portion 212 is connected to the first stopper portion 211, and the first positioning portion 212 is disposed farther from the valve core 4 than the first stopper portion 211 along the axial direction of the valve rod 21, and during the machining process, the central axis of the first positioning portion 212 coincides with or tends to coincide with the reference central axis of the valve rod 21, specifically, the allowable offset of the central axis of the first positioning portion 212 with respect to the reference central axis of the valve rod 21 is set to be less than 0.02mm. At least part of the first positioning portion 212 is located in the first positioning hole 246, and during the assembly process of the first positioning portion 212 and the first positioning hole 246, the central axis of the first positioning portion 212 coincides or tends to coincide with the central axis of the first positioning hole 246, specifically, the allowable assembly offset of the central axis of the first positioning portion 212 relative to the central axis of the first positioning hole 246 is set to be less than 0.05mm. Thus, the first positioning hole 246 is matched with the first positioning portion 212 to ensure the coaxiality requirement of the valve rod 21 and the connecting seat 24. The connecting seat 24 further includes a second positioning portion 247, the second positioning portion 247 is disposed closer to the valve core 4 than the first positioning hole 246 along the axial direction of the connecting seat 24, the central axis of the second positioning portion 247 coincides with or tends to coincide with the reference central axis of the connecting seat 24 during the machining process, and specifically, the allowable offset of the central axis of the second positioning portion 247 with respect to the reference central axis of the connecting seat 24 is set to be less than 0.02mm. When the valve member 2 is fixedly connected with the valve body assembly 3 through the connecting seat 24, at least part of the second positioning portion 247 is located in the valve body cavity 30, the second positioning portion 247 can abut against a side wall forming the valve body cavity 30, the central axis of the second positioning portion 247 coincides with or tends to coincide with the central axis of the valve body cavity 30 during the assembly process of the second positioning portion 247 and the valve body cavity 30, and specifically, the allowable assembly offset of the central axis of the second positioning portion 247 relative to the central axis of the valve body cavity 30 is set to be less than 0.03mm. Thus, the positioning fit between the valve body cavity 30 and the second positioning portion 247 is beneficial to ensuring the coaxiality requirement between the connecting seat 24 and the valve body cavity 30, and the connecting seat 24 and the valve rod 21 ensure the coaxiality requirement, so as to be beneficial to ensuring the coaxiality requirement between the valve rod 21 and the valve body cavity 30.

Referring to fig. 1, 5 and 9, the valve body assembly 3 further includes a second positioning hole 35, the second positioning hole 35 is formed by recessing from the bottom wall forming the valve body cavity 30 in the axial direction of the valve body cavity 30, and during the machining process, the central axis of the second positioning hole 35 coincides or tends to coincide with the central axis of the valve body cavity 30, specifically, the allowable offset of the central axis of the second positioning hole 35 with respect to the central axis of the valve body cavity 30 is set to be less than 0.02mm with reference to the central axis of the valve body cavity 30. The electric valve 100 further includes a positioning column 36, the positioning column 36 is integrally formed, in this embodiment, the positioning column 36 includes a third positioning portion 361 and a fourth positioning portion 362, the third positioning portion 361 and the fourth positioning portion 362 are connected, and the third positioning portion 361 is disposed farther from the valve rod 21 than the fourth positioning portion 362 along the axial direction of the positioning column 36. The central axis of the third positioning portion 361 coincides with or tends to coincide with the central axis of the fourth positioning portion 362, and specifically, the allowable offset amount of the central axis of the fourth positioning portion 362 with respect to the central axis of the third positioning portion 361 is set to be less than 0.02mm with reference to the central axis of the third positioning portion 361. At least part of the third positioning portion 361 is located in the second positioning hole 35, the third positioning portion 361 can be abutted against the peripheral side wall forming the second positioning hole 35, the central axis of the third positioning portion 361 coincides or tends to coincide with the central axis of the second positioning hole 35 during the assembling process, and specifically, the allowable assembling offset of the central axis of the third positioning portion 361 relative to the central axis of the second positioning hole 35 is set to be less than 0.03mm. Fourth locator portion 362 is positioned higher than second locator aperture 35, or fourth locator portion 362 is positioned in valve body cavity 30. Thus, the requirement of coaxiality between the positioning column 36 and the valve body cavity 30 can be ensured by positioning and matching the second positioning hole 35 and the third positioning part 361. Certainly as other embodiments, the positioning column 36 and the valve body assembly 3 can also be integrally formed, and in this embodiment, the positioning column 36 and the valve body assembly 3 are provided as separate structures, which is beneficial to facilitating respective forming.

Referring to fig. 9 and 12, the valve core 4 further includes a third positioning hole 43, the third positioning hole 43 is formed by being recessed inward from the lower end surface of the valve core 4 in the axial direction of the valve core 4, the central axis of the third positioning hole 43 coincides with or tends to coincide with the reference central axis of the valve core 4 during machining, and specifically, the allowable offset of the central axis of the third positioning hole 43 with respect to the reference central axis of the valve core 4 is set to be less than 0.02mm. When the valve core 4 is assembled with the positioning column 36, at least a part of the fourth positioning portion 362 is located in the third positioning hole 43, the central axis of the third positioning hole 43 coincides with or tends to coincide with the central axis of the fourth positioning portion 362, and specifically, the allowable assembly offset of the central axis of the third positioning hole 43 relative to the central axis of the fourth positioning portion 362 is set to be less than 0.05mm. Thus, the positioning fit between the third positioning hole 43 and the fourth positioning portion 362 is beneficial to ensuring the coaxiality requirement of the valve core 4 and the positioning column 36, and the positioning column 36 keeps the coaxiality requirement with the valve body cavity 30, so that the coaxiality requirement of the valve core 4 and the valve body cavity 30 is further facilitated to be ensured. Thus, under the condition of ensuring the coaxiality requirement of the valve rod 21 and the valve body cavity 30 and ensuring the coaxiality requirement of the valve core 4 and the valve body cavity 30, the valve body cavity 30 is taken as a reference, the coaxiality requirement of the valve rod 21 and the valve core 4 in the transmission process is favorably ensured, and particularly, in the embodiment, the coaxiality tolerance of each stage in the machining and assembling process is calculated in a statistical tolerance mode, so that the coaxiality tolerance requirement of the valve rod 21 and the valve core 4 can be controlled within the range of 0.05-0.1 mm approximately.

Referring to fig. 1, 8, 10, and 12, by providing the positioning column 36, the risk that the valve element 4 is inclined or excessively offset relative to the valve rod 21 due to the influence of the pressure of the high-pressure fluid is reduced, which is beneficial to ensuring the coaxiality requirement of the valve rod 21 and the valve element 4, and is beneficial to enabling the valve rod 21 to smoothly drive the valve element 4 to rotate, thereby improving the stability of the electric valve 100. Further, in the present embodiment, the valve element 4 further has a fourth positioning hole 44, the fourth positioning hole 44 is formed by being recessed inward from the bottom surface of the first stopper groove 42 in the axial direction of the valve element 4, and the fourth positioning hole 44 communicates with the groove cavity formed by the first stopper groove 42 in terms of a single component of the valve element 4, and the center axis of the fourth positioning hole 44 coincides or tends to coincide with the reference center axis of the valve element 4 during machining, specifically, the center axis of the fourth positioning hole 44 is set to have an allowable offset of less than 0.02mm from the reference center axis of the valve element. Correspondingly, the valve rod 21 further includes a fifth positioning portion 213, the fifth positioning portion 213 is connected to the first limiting portion 211, the fifth positioning portion 213 is disposed farther from the first positioning portion 212 than the first limiting portion 211 along the axial direction of the valve rod 21, the central axis of the fifth positioning portion 213 coincides with or tends to coincide with the reference central axis of the valve rod 21 during the machining process, and specifically, the allowable offset of the central axis of the fifth positioning portion 213 compared with the reference central axis of the valve rod 21 is set to be less than 0.02mm. When the valve rod 21 is in transmission connection with the valve core 4, at least part of the fifth positioning portion 213 is located in the fourth positioning hole 44, and the fifth positioning portion 213 and the fourth positioning hole 44 are arranged in a positioning fit manner, so that two ends of the valve core 4 are respectively in positioning fit with the valve rod 21 through the positioning columns 36, which is beneficial to better reducing the possibility that the valve core 4 is inclined or excessively deviated relative to the valve rod 21 due to the influence of the pressure of high-pressure fluid, and is beneficial to better ensuring the coaxiality requirement of the valve rod 21 and the valve core 4 in the transmission process, thereby improving the stability of the electric valve 100.

Referring to fig. 5, 9 and 12, in the present embodiment, a portion of the third positioning portion 361 is located in the second positioning hole 35, and along the axial direction of the positioning column 36, the third positioning portion 361 is located higher than the second positioning hole 35, and specifically, a plane is defined, the plane is a plane passing through the central axis of the valve body cavity 30, the plane may be a cross section as shown in fig. 9, a height of the projection of the second positioning hole 35 on the plane is defined as H, a height of the projection of the third positioning portion 361 on the plane is defined as H, and the following relationship is satisfied: H-H is more than or equal to 0.5mm and less than or equal to 1mm. A width of the projection of the third positioning portion 361 on the plane is defined as W, and a width of the projection of the fourth positioning portion 362 on the plane is defined as W, W > W, so that a second step surface 363 is formed between the fourth positioning portion 362 and the third positioning portion 361. The fourth positioning portion 362 is located in the third positioning hole 43 of the spool, and the lower end surface of the spool 4 abuts against the second step surface 363. Like this, compare in the bottom wall butt that sets up the direct and valve body chamber 30 of lower terminal surface of case 4, in this embodiment, be favorable to reducing the contact friction area of case 4 terminal surface under the rotation in-process, be favorable to reducing the friction loss of case 4. Specifically, the abutting area between the lower end surface of the valve element 4 and the second step surface 363 can be reduced as much as possible under the condition that the abutting between the lower end surface of the valve element 4 and the second step surface 363 is stable, and specifically, W-W is set to be greater than or equal to 2mm and less than or equal to 4mm.

Referring to fig. 9 and 12, the fourth positioning portion 362 is located in the third positioning hole 43, a projection height of the fourth positioning portion 362 on the plane is defined as L1, a projection height of the third positioning hole 43 on the plane is defined as L2, and L2 > L1 is provided to avoid over-constraint or to ensure that the lower end surface of the valve element 4 can abut against the second step surface 363. In addition, L2 > L1 is set, that is, the lower end surface of the valve element 4 abuts against the second step surface 363, compared with the case that the free end surface of the fourth positioning portion 362 abuts against the bottom surface of the third positioning hole 43, the positioning and matching between the fourth positioning portion 362 and the third positioning hole 43 are facilitated to be stable, and the stability of the valve element 4 in the rotation process is facilitated to be improved. Specifically, to ensure stable positioning fit between the fourth positioning portion 362 and the third positioning hole 43, in this embodiment, L1 is set to be greater than or equal to 4mm and less than or equal to 6mm.

Referring to fig. 9, 10, 12 and 13, when the valve rod 21 is in transmission connection with the valve core 4, part of the fifth positioning portion 213 is located in the fourth positioning hole 44, since the output frame 2351 and the valve rod 21 are integrally formed in the embodiment, and the output frame 2351 is abutted against the connecting seat 24, in order to avoid over-constraint, a fit clearance is required to be left between the lower end surface of the first limiting portion 211 and the bottom surface of the first limiting groove 42, and specifically, the fit clearance can be set to be 0.5mm to 1mm. The height of the projection of the fifth positioning portion 213 on the plane is defined as L3, the height of the projection of the fourth positioning hole 44 on the plane is defined as L4, the height of the projection of the fit clearance on the plane is defined as L5, L5+ L4 > L3 is set, specifically, 4mm or less and L3 or less and 6mm or less can be set, so that under the condition that the stable positioning and matching of the fifth positioning portion 213 and the fourth positioning hole 44 is guaranteed, the condition that the output frame 2351 is abutted to the connecting seat 24 and is over-constrained due to the fact that the free end surface of the fifth positioning portion 213 is abutted to the bottom surface of the fourth positioning hole 44 is avoided.

Of course, as another embodiment, in combination with fig. 12, it may be further provided that the third positioning hole 43 is communicated with the duct 41 and/or the fourth positioning hole 44 is communicated with the duct 41, and it should be noted that, when the third positioning hole 43 and/or the fourth positioning hole 44 is communicated with the duct 41, in order to ensure stable flow rate flowing through the duct 41, it is also required to ensure that the fourth positioning portion 362 is not located in the duct 41 and/or the fifth positioning portion 213 is not located in the duct 41.

It should be noted that: although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications and equivalents may be made to the present application, and all technical solutions and modifications that do not depart from the spirit and scope of the present application should be covered by the claims of the present application.

Claims (10)

1. An electrically operated valve, comprising a valve member, a valve body assembly, a valve rod and a valve core, wherein the valve body assembly is provided with a valve body cavity, the valve core is arranged in the valve body cavity, one end of the valve rod is in transmission connection with the valve member, the other end of the valve rod is in transmission connection with the valve core, the valve member is connected with the valve body assembly, and the electrically operated valve is characterized in that: the valve member has a first positioning hole, the valve stem includes a first positioning portion, and at least a portion of the first positioning portion is located in the first positioning hole; the valve component further comprises a second positioning part, at least part of the second positioning part is positioned in the valve body cavity, and the second positioning part is abutted with the side wall forming the valve body cavity; the valve body assembly is provided with a second positioning hole which is formed by inwards recessing from the bottom wall forming the valve body cavity along the axial direction of the valve body cavity, the electric valve further comprises a positioning column, part of the positioning column is positioned in the second positioning hole, and one part of the positioning column is abutted against the peripheral side wall forming the second positioning hole; the valve core is provided with a third positioning hole, and the other part of the positioning column is positioned in the third positioning hole.

2. Electrically operated valve according to claim 1, characterized in that: the positioning column comprises a third positioning part and a fourth positioning part, the third positioning part is arranged far away from the valve rod than the fourth positioning part along the axial direction of the positioning column, the third positioning hole is formed by inwards sinking from the lower end surface of the valve core along the axial direction of the valve core, at least part of the third positioning part is positioned in the second positioning hole, and at least part of the fourth positioning part is positioned in the third positioning hole;

the central axis of the second positioning hole coincides with or tends to coincide with the central axis of the valve body cavity, the central axis of the third positioning hole coincides with or tends to coincide with the central axis of the fourth positioning hole, the central axis of the third positioning hole coincides with or tends to coincide with the reference central axis of the valve core, and the central axis of the fourth positioning hole coincides with or tends to coincide with the central axis of the third positioning hole.

3. Electrically operated valve according to claim 2, characterized in that: the valve component comprises a connecting seat, the connecting seat is provided with a first positioning hole, the first positioning hole penetrates through the connecting seat, the connecting seat further comprises a second positioning part, and the second positioning part is arranged closer to the valve core than the first positioning hole along the axial direction of the connecting seat;

the central axis of the first positioning hole is coincided with or tends to coincide with the reference central axis of the connecting seat; the central axis of the second positioning part is coincided with or tends to coincide with the reference central axis of the connecting seat; the central axis of the first positioning part is coincident with or tends to coincide with the reference central axis of the valve rod; the central axis of the first positioning part is coincident with or tends to coincide with the central axis of the first positioning hole.

4. The electrically operated valve of claim 3, wherein: the allowable machining offset of the central axis of the first positioning hole relative to the reference central axis of the connecting seat is less than 0.02mm, the allowable machining offset of the central axis of the positioning second positioning part relative to the reference central axis of the connecting seat is less than 0.02mm, the allowable machining offset of the central axis of the first positioning part relative to the reference central axis of the valve rod is less than 0.02mm, and the allowable assembling offset of the central axis of the first positioning part relative to the central axis of the first positioning hole is less than 0.05mm; the allowable machining offset of the central axis of the second positioning hole relative to the central axis of the valve body cavity is less than 0.02mm, the allowable machining offset of the central axis of the fourth positioning hole relative to the central axis of the third positioning hole is less than 0.02mm, the allowable machining offset of the central axis of the third positioning hole relative to the reference central axis of the valve core is less than 0.02mm, and the allowable assembly offset of the central axis of the third positioning hole relative to the central axis of the fourth positioning hole is less than 0.05mm.

5. Electrically operated valve according to any of claims 2-4, characterized in that: the valve element further comprises a first limiting groove, the first limiting groove is formed by inwards recessing the upper end face of the valve element along the axial direction of the valve element, the valve rod comprises a first limiting portion, the first limiting portion is far away from the valve element than the first limiting portion along the axial direction of the valve rod, the first limiting portion is a non-rotating body, at least part of the first limiting portion is located in a groove cavity formed by the first limiting groove, and the valve rod can drive the valve element to rotate through the first limiting portion.

6. The electrically operated valve of claim 5, wherein: the valve core further comprises a fourth positioning hole which is formed by inwards recessing from the bottom surface of the first limiting groove along the axial direction of the valve core, the valve rod comprises a fifth positioning part, the fifth positioning part is arranged farther away from the first positioning part than the first limiting part along the axial direction of the valve rod, and at least part of the fifth positioning part is positioned in the fourth positioning hole; the allowable machining offset of the central axis of the fourth positioning hole relative to the reference central axis of the valve core is less than 0.02mm, and the allowable machining offset of the central axis of the fifth positioning part relative to the reference central axis of the valve rod is less than 0.02mm.

7. Electrically operated valve according to claim 6, characterized in that: part of the third positioning portion is located in the second positioning hole, the third positioning portion is arranged higher than the second positioning hole along the axial direction of the positioning column, a second step surface is formed between the fourth positioning portion and the third positioning portion, the fourth positioning portion is located in the third positioning hole, and the lower end face of the valve core is abutted to the second step surface.

8. The electrically operated valve of claim 7, wherein: a plane is defined, the plane is a plane passing through the central axis of the valve body cavity, the height of the projection of the second positioning hole on the plane is defined as H, the height of the projection of the third positioning part on the plane is defined as H, and the height of the projection of the third positioning part on the plane is satisfied: H-H is more than or equal to 0.5mm and less than or equal to 1mm; defining the width of the projection of the third positioning part on the plane as W, and the width of the projection of the fourth positioning part on the plane as W, wherein the width of the projection of the third positioning part on the plane satisfies the following conditions: W-W is more than or equal to 2mm and less than or equal to 4mm; the height of the projection of the fourth positioning part on the plane is defined to be L1, the height of the projection of the third positioning hole on the plane is defined to be L2, and the height of the projection of the third positioning hole on the plane is satisfied with the following conditions: l2 is more than L1, and L1 is more than or equal to 4mm and less than or equal to 6mm.

9. The electrically operated valve of claim 8, wherein: the valve component comprises a transmission assembly, the transmission assembly comprises an output frame, the valve rod and the output frame are integrally formed, the output frame is abutted against the connecting seat, and a fit clearance is reserved between the lower end face of the first limiting part and the bottom face of the first limiting groove; the height of the projection of the fifth positioning portion on the plane is defined to be L3, the height of the projection of the fourth positioning hole on the plane is defined to be L4, the height of the projection of the fit clearance on the plane is defined to be L5, and the three satisfy the following relation: l5+ L4 is more than L3, L3 is more than or equal to 4mm and less than or equal to 6mm, and L5 is more than or equal to 0.5 and less than or equal to 1mm.

10. Electrically operated valve according to any of claims 6-9, characterized in that: the valve core is provided with a pore passage, the third positioning hole is communicated with the pore passage and/or the fourth positioning hole is communicated with the pore passage, the fourth positioning part is not positioned in the pore passage, and the fifth positioning part is not positioned in the pore passage.

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