CN219345510U

CN219345510U - Electronic expansion valve

Info

Publication number: CN219345510U
Application number: CN202222907923.8U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-07-14
Anticipated expiration: 2032-10-31

Abstract

The electronic expansion valve comprises a rotor assembly, wherein the rotor assembly comprises a connecting body and a magnetic rotor, the connecting body is fixedly connected with the magnetic rotor, the connecting body comprises a body part and a protruding part, the protruding part protrudes upwards from the body part, the connecting body comprises a limiting part, and at least part of the limiting part is recessed towards the central axis direction of the protruding part from the peripheral wall of the protruding part; the electronic expansion valve further comprises a stop piece, the stop piece comprises a clamping portion and a stop rod, the clamping portion is closer to the protruding portion than the stop rod, and the clamping portion is clamped with the limiting portion. This is advantageous in that the connection of the stop member and the connecting body is simplified.

Description

Electronic expansion valve

Technical Field

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

Background

The electronic expansion valve comprises a rotor assembly, a stop piece and a valve core component, wherein the valve core component comprises a screw rod, the rotor assembly comprises a connecting body, the screw rod is fixedly connected with the connecting body, the stop piece is used for limiting the stroke of the screw rod, the stop piece is usually fixed with the connecting body by adopting welding in the conventional technology, and therefore a welding process is required to be added.

Disclosure of Invention

The object of the present application is to provide an electronic expansion valve which facilitates the simplification of the connection of the stopper and the connecting body.

In order to achieve the above object, an embodiment of the present application adopts the following technical scheme:

the electronic expansion valve comprises a rotor assembly, wherein the rotor assembly comprises a connector and a magnetic rotor, the connector is fixedly connected with the magnetic rotor, the connector comprises a body part and a protruding part, the protruding part protrudes upwards from the body part, the connector comprises a limiting part, and at least part of the limiting part is recessed from the outer Zhou Bichao of the protruding part to the central axis direction of the protruding part; the electronic expansion valve further comprises a stop piece, the stop piece comprises a clamping part and a stop rod, the clamping part is closer to the protruding part than the stop rod, the clamping part is in butt joint with the limiting part, and the clamping part is clamped with the connecting body; the body portion has a mating portion, at least a portion of the stopper rod is located in the mating portion, the stopper rod abuts against a wall forming the mating portion, and the wall of the mating portion restricts a radial position and a circumferential position of the stopper rod.

In one embodiment provided by the application, the connector comprises a body part and a protruding part, the connector comprises a limiting part, and at least part of the limiting part is recessed from the peripheral wall of the protruding part towards the central axis direction of the protruding part; the stop piece comprises a clamping part and a stop rod, the clamping part is in butt joint with the limiting part, and the clamping part is clamped with the connecting body; the body portion has a mating portion, at least a portion of the stop lever being located in the mating portion, the stop lever abutting against a wall forming the mating portion, the wall forming the mating portion limiting the radial and circumferential positions of the stop lever. This is advantageous in that the connection of the stop member and the connecting body is simplified.

Drawings

FIG. 1 is a schematic cross-sectional view of a first embodiment of an electronic expansion valve provided herein;

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

FIG. 3 is a schematic cross-sectional structural view of the rotor assembly and stop of FIG. 1 from one perspective of engagement;

FIG. 4 is a schematic top view of the rotor assembly and stop member of FIG. 1 mated;

FIG. 5 is a schematic cross-sectional structural view of one view of the rotor assembly of FIG. 1;

FIG. 6 is a schematic cross-sectional structural view of a rotor assembly and stopper mating view of other embodiments of electronic expansion valves provided herein;

fig. 7 is a schematic top view of the rotor assembly and stopper cooperation in a second embodiment of the electronic expansion valve provided herein.

Detailed Description

The present application is further described with reference to the accompanying drawings and specific examples:

referring to fig. 1-5, a first embodiment of an electronic expansion valve 100 is illustrated, where the electronic expansion valve 100 includes a valve body 1, a coil assembly 2, and a valve member 3, a portion of the valve member 3 is disposed in the valve body 1, the valve member 3 is fixedly connected to the valve body 1, the connection manner includes a threaded connection, and the coil assembly 2 is fixedly connected to the valve body 1, the connection manner includes a screw connection. The coil assembly 2 comprises a stator assembly 21 and an injection molded body 22, the injection molded body 22 surrounding at least part of the stator assembly 21, the coil assembly 2 having a receiving cavity 221, the receiving cavity 221 having an opening in the injection molded body 22 towards the valve body 1. The valve member 3 includes a valve seat member 31, a rotor assembly 32, a screw valve core member 33, a nut assembly 34, and a sleeve 35, and the lower end portion of the sleeve 35 is connected to the valve seat member 31 by welding. At least a portion of the sleeve 35 is positioned in the receiving cavity 221, a portion of the sleeve 35 is positioned between the rotor assembly 32 and the stator assembly 21, the rotor assembly 32 is positioned inside the sleeve 35, and the stator assembly 21 is positioned outside the sleeve 35. In the present embodiment, the valve seat member 31 includes the first valve seat portion 311 and the second valve seat portion 312, and in the present embodiment, the first valve seat portion 311 and the second valve seat portion 312 are formed separately and fixedly connected, and in other embodiments, the first valve seat portion 311 and the second valve seat portion 312 may be formed integrally. In this embodiment, the screw core part 33 is connected to the rotor assembly 32, the screw core part 33 includes a valve core part 331 and a screw part 332, the valve core part 331 is connected to the screw part 332, and the connection manner includes a fixed connection, a limit connection or a transmission connection, however, in other embodiments, the valve core part 331 and the screw part 332 may be integrally formed. The stator assembly 21 is supplied with a predetermined current to generate an excitation magnetic field, the rotor assembly 32 can rotate in the excitation magnetic field, the rotor assembly 32 drives the screw rod portion 332 to rotate, the screw rod portion 332 is in threaded fit with the nut assembly 34, the rotor assembly 32 drives the valve core portion 331 to act relative to the valve seat member 31, specifically, the second valve seat portion 312 is provided with a valve port 3121, the screw rod portion 332 drives the valve core portion 331 to axially move relative to the valve port 3121, and the flow area of the valve port 3121 is adjusted. For convenience of description, the upper and lower directions are defined as the upper and lower directions of the drawings in the specification drawings, and the upper and lower directions merely represent relative positions.

Referring to fig. 1-5, the rotor assembly 32 includes a connecting body 321 and a magnetic rotor 322, where the connecting body 321 is fixedly connected with the magnetic rotor 322, in this embodiment, the connecting body 321 and the magnetic rotor 322 are injection-molded and fixed, and the connecting body 321 is used as an insert to form the magnetic rotor 322. The connector 32 includes a main body portion 3211 and a protrusion portion 3212, the main body portion 3211 and the protrusion portion 3212 are integrally formed, and the protrusion portion 3212 protrudes upward from the main body portion 3211. The electronic expansion valve 100 further includes a stopper 4, where the stopper 4 includes a locking portion 41 and a stopper rod 42, and in this embodiment, the locking portion 41 and the stopper rod 42 are integrally formed, and in other embodiments, the locking portion 41 and the stopper rod 42 may be separately formed and then fixedly connected. In this embodiment, the material of the clamping portion 41 is a metal material, the stopper 4 is made of a metal member by bending, and the clamping portion 41 has an elastic restoring force. In this embodiment, the metal member has a circular structure, and in other embodiments, the metal member may have a square structure or other shape structure. The engagement portion 41 is closer to the boss portion 3212 than the stopper rod 42, the engagement portion 41 has an annular structure, the engagement portion 41 is substantially parallel to the main body portion 3211, a joint between the stopper rod 42 and the engagement portion 41 is a bent portion, and the stopper rod 42 is substantially parallel to the central axis of the magnetic rotor 322. The connector 321 includes a limiting portion 3213, in this embodiment, the limiting portion 3213 is disposed on an outer peripheral wall of the protruding portion 3212, the limiting portion 3213 is recessed from the outer peripheral wall of the protruding portion 3212 toward a central axis direction of the protruding portion 3212, the limiting portion 3213 is close to the body portion 3211, in this embodiment, the limiting portion 3213 is in a circular structure, and in other embodiments, the limiting portion 3213 may also be in a square structure or other shape structures. In this embodiment, the stopper portion 3213 is disposed around a circumference of the outer circumferential wall of the boss portion 3212, and in other embodiments, the stopper portion 3213 may be disposed at a portion of the circumference of the outer circumferential wall of the boss portion 3212. The outer diameter of the protruding portion 3212 gradually decreases from the joint with the body portion 3211 to the top of the protruding portion 3212, and thus the outer peripheral wall of the protruding portion 3212 forms an installation guiding portion, so that the clamping portion 41 and the limiting portion 3213 can be matched conveniently. The clamping portion 41 is clamped into the limiting portion 3213, at least part of the clamping portion 41 is located on the limiting portion 3213, the clamping portion 41 is in contact with the inner peripheral wall of the limiting portion 3213, and the upper wall and the lower wall of the limiting portion 3213 limit the axial movement of the clamping portion 41. The engaging portion 41 engages the stopper portion 3213 by elastic restoring force, and engages the engaging portion 41 with the connecting body 321 to restrict movement of the stopper 4 in the circumferential direction and the axial direction. In this embodiment, the stopper portion 3213 is adjacent to the main body portion 3211, and at least a part of the outer peripheral wall of the engagement portion 41 abuts against the main body portion 3211, thereby further restricting the axial movement of the stopper 4. The connector 321 and the stop piece 4 are matched simply, the connection of the connector 321 and the stop piece 4 saves a welding process, and the production cost of the electronic expansion valve 100 is reduced. In other embodiments, at least a portion of the limiting portion 3213 is located on the outer peripheral wall of the protruding portion 3212, and at least a portion of the limiting portion 3213 is located on the body portion 3211, so that the locking portion 41 abuts against the limiting portion 3213 and abuts against the body portion 3211, and the stopper 4 is limited to move in the axial direction and the circumferential direction. In other embodiments, the stopper portion 3213 is provided on the outer peripheral wall of the boss portion 3212, the engaging portion 41 abuts against the stopper portion 3213, and a distance is provided between the engaging portion and the body portion 3211. In this embodiment, the stopper 4 is made of a metal piece by bending, a bending part is arranged between the clamping part 41 and the stopper rod 42, the clamping part 41 is an annular structure formed by bending the metal piece, the processing technology of the stopper 4 is simple, the processing cost of the stopper 4 is reduced, and the processing of the stopper 4 is convenient.

Referring to fig. 3 to 5, the body portion 3211 has a fitting portion 3214, the fitting portion 3214 includes a first through hole penetrating the body portion 3211 in the axial direction, one end of the stopper rod 42 remote from the engagement portion 41 penetrates the first through hole, at least a part of the stopper rod 42 is located in the first through hole, an outer peripheral wall of the stopper rod 42 abuts against a wall forming the first through hole, and the wall forming the first through hole restricts a radial position and a circumferential position of the stopper 4, further restricting movement of the stopper 4 in the circumferential direction. The stopper portion 3213 restricts the movement of the stopper 4 in the axial and circumferential directions, and the wall forming the engagement portion 3214 restricts the radial position and circumferential position of the stopper rod 42, so that the engagement of the connector 321 with the stopper 4 is simple. In this embodiment, a plurality of engaging portions 3214 are provided, and the stopper rod 42 and the body portion 3211 are conveniently engaged. In other embodiments, the number of the limiting portions 3214 may be 1.

Referring to fig. 1-3, the rotor assembly 32 further includes a spring rail 324 and a slip ring 323, the spring rail 324 is disposed on the outer periphery of the nut assembly 34, the slip ring 323 is disposed along a track 3221 formed by the spring rail 324, and a portion of the slip ring 323 is disposed along the track 3221 formed by the spring rail 324. One end 3231 of the slip ring 323 is bent away from the nut assembly 34, and the stopper rod 42 abuts against the bent end of the slip ring 323. When a predetermined current is supplied to the stator assembly 21, an excitation magnetic field can be generated, the magnetic rotor 322 can rotate in the excitation magnetic field, the magnetic rotor 322 drives the connecting body 321 to rotate, the connecting body 321 drives the stop rod 42 to rotate when rotating, one end of the stop rod 42 is abutted with one end of the slip ring 323, the slip ring 323 slides up and down along with the stop rod 42, and the upper stop position 3222 and the lower stop position 3223 of the track 3221 can be reached, so that the travel of the stop 4 is limited.

Referring to fig. 6, in other embodiments, the stopper 4 includes a first end 43, the first end 43 being an end of the clamping portion 41 away from the stopper rod 42, the first end 43 extending from the clamping portion 41 toward the body portion 3211, the body portion 3211 having a first mating portion 3215, the first mating portion 3215 including a second through hole or counterbore. At least a portion of the first end 43 is located at the first engagement portion 3215, the first end 43 abuts a wall forming the first engagement portion 3215, and the wall forming the first engagement portion 3215 further restricts the movement of the stopper 4 in the circumferential direction. In other embodiments, at least part of the first end 43 is located at the engaging portion 3214, the first end 43 abuts against a wall forming the engaging portion 3214, and the wall forming the engaging portion 3214 restricts the movement of the stopper 4 in the circumferential direction, so that the process of providing the first engaging portion 3215 can be omitted, the connector 321 has a simple structure, and the engagement between the stopper 4 and the connector 321 is simple.

Referring to fig. 7, a second embodiment of the electronic expansion valve 100 is illustrated, with the mating portion 3214 including a first recess. The first recess sets up in the periphery of body portion 3211, and the first recess has the opening towards magnetic rotor 322, and the first recess runs through body portion 3211 along the axial, and at least part stop lever 42 is located first recess, and the periphery wall of stop lever 42 does not surpass first recess, and the periphery wall of stop lever 42 and the wall butt that forms first recess form the radial position and the circumference position of stopper 4 of wall restriction of first recess, and joint portion 41 restriction stopper 4 is in axial and circumference motion, sets up connector 321 and stopper 4 cooperation like this simply, saves the welding process.

It should be noted that: the above embodiments are only for illustrating the present utility model and not for limiting the technical solutions described in the present utility model, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present utility model may be modified or substituted by the same, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present utility model are intended to be included in the scope of the claims of the present utility model.

Claims

1. An electronic expansion valve (100) is characterized by comprising a rotor assembly (32), wherein the rotor assembly (32) comprises a connector (321) and a magnetic rotor (322), the connector (321) is fixedly connected with the magnetic rotor (322), the connector (321) comprises a body part (3211) and a protruding part (3212), the protruding part (3212) protrudes upwards from the body part (3211), the connector (321) comprises a limiting part (3213), and at least part of the limiting part (3213) is recessed from the outer side Zhou Bichao of the protruding part (3212) to the central axis direction of the protruding part (3212); the electronic expansion valve (100) further comprises a stop piece (4), the stop piece (4) comprises a clamping portion (41) and a stop rod (42), the clamping portion (41) is closer to the protruding portion (3212) than the stop rod (42), and the clamping portion (41) is clamped with the limiting portion (3213).

2. The electronic expansion valve (100) according to claim 1, wherein the body portion (3211) has a fitting portion (3214), a part of the stopper rod (42) is located at the fitting portion (3214), an outer peripheral wall of the stopper rod (42) abuts against a wall forming the fitting portion (3214), and the wall forming the fitting portion (3214) restricts a radial position and a circumferential position of the stopper rod (42).

3. The electronic expansion valve (100) according to claim 2, wherein the limiting portion (3213) is located at an outer peripheral wall of the protruding portion (3212), the locking portion (41) is of an annular structure, and the locking portion (41) is locked to the limiting portion (3213).

4. The electronic expansion valve (100) according to claim 3, wherein the clamping portion (41) is made of a metal material, the clamping portion (41) has an elastic restoring force, and the clamping portion (41) clamps the limiting portion (3213).

5. The electronic expansion valve (100) according to claim 4, wherein the number of the fitting portions (3214) is at least 1, the fitting portions (3214) include a first through hole or a first groove, and the stopper rod (42) abuts against a wall forming the first through hole or the first groove.

6. The electronic expansion valve (100) of claim 5, wherein the mating portion (3214) includes a first through-hole extending axially through the body portion (3211), at least a portion of the stopper rod (42) being located in the first through-hole, the stopper rod (42) abutting a wall forming the first through-hole, the wall forming the first through-hole limiting a radial position and a circumferential position of the stopper rod (42).

7. The electronic expansion valve (100) of claim 5, wherein the mating portion (3214) includes a first groove having an opening toward the magnetic rotor (322), the first groove being provided at an outer periphery of the body portion (3211), the first groove extending axially through the body portion (3211), at least a portion of the stopper rod (42) being located in the first groove, the stopper rod (42) abutting a wall forming the first groove, the wall forming the first groove limiting a radial position and a circumferential position of the stopper rod (42).

8. The electronic expansion valve (100) according to claim 6 or 7, wherein the stopper (4) is made of a metal piece by bending, the locking portion (41) and the locking lever (42) are integrally formed, a joint of the locking lever (42) and the locking portion (41) is a bending portion, the locking portion (41) is substantially parallel to the body portion (3211), and the locking lever (42) is substantially parallel to a central axis of the magnetic rotor (322).

9. The electronic expansion valve (100) according to claim 8, wherein the stopper (4) comprises a first end portion (43), the first end portion (43) being located at an end of the click-on portion (41) remote from the stopper rod (42), the first end portion (43) extending from the click-on portion (41) toward the body portion (3211); the body portion (3211) has a first mating portion (3215), the first mating portion (3215) includes a second through-hole or counterbore, a portion of the first end (43) is located at the first mating portion (3215), and the first end (43) abuts a wall forming the first mating portion (3215).

10. The electronic expansion valve (100) of claim 9, wherein the electronic expansion valve (100) comprises a spring rail (324) and a slip ring (323), the slip ring (323) being partially located on a track (3221) formed by the spring rail (324), the stop rod (42) abutting the slip ring (323).