An electrically operated valve

Abstract

The application discloses an electric valve, which comprises a valve body, a rotor component, a transmission plate and a gear reduction mechanism, the rotor component comprises a rotor shaft, the transmission plate is fixedly connected to a transmission end of the rotor shaft, and the rotor shaft drives an input gear of the gear reduction mechanism to rotate through the transmission plate; the electric valve further comprises an elastic body, and the transmission plate is in elastic contact with the input gear through the elastic body to realize power transmission; compared with the direct collision transmission power between the transmission plate and the input gear in the background art, the transmission plate and the input gear in the application are in elastic contact through the elastic body to realize power transmission, so that the transmission noise is greatly reduced, the noise pollution of the electric valve is reduced, the electric valve is beneficial to be applied to an environment with relatively high noise requirement, and the use flexibility of the electric ball valve is improved.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and in particular to an electric valve. Background Technology

[0002] Electric valves are used in fluid control systems to control the on / off state or flow rate of fluid.

[0003] When in operation, the coil of the electric valve is energized to drive the rotor to rotate. The rotor drives the reduction gear mechanism and amplifies the output torque, which drives the valve stem to rotate, thereby actuating the valve core and causing the valve core to open, close or regulate the flow.

[0004] When the rotor shaft of the electric valve rotates, it drives the transmission component to rotate, and the transmission component drives the sun gear to rotate. Typically, the motor of the electric valve is a stepper motor, and the rotor rotates intermittently. Therefore, during operation, there will be intermittent impacts between the transmission component and the sun gear, which will cause the electric valve to generate noise during operation.

[0005] Background Therefore, how to reduce the noise of electric valves during operation is a technical problem that those skilled in the art need to solve. Summary of the Invention

[0006] This invention provides an electric valve, comprising a valve body, a rotor assembly, a transmission plate, and a gear reduction mechanism. The rotor assembly includes a rotor shaft, and the transmission plate is fixedly connected to the transmission end of the rotor shaft. The rotor shaft can drive the transmission plate to rotate. One of the transmission plate and the input gear of the gear reduction mechanism is provided with a groove, and the other is provided with a plate body inserted into the groove. The transmission plate drives the input gear to rotate through the cooperation between the plate body and the groove. The electric valve also includes an elastic body, which is provided at least on the contact surface between the plate body and the groove.

[0007] Compared with the prior art where the transmission component directly collides with the input gear to transmit power, in this invention, one of the transmission plate and the input gear is provided with a groove, and the other is provided with a plate body inserted into the groove. The transmission plate drives the input gear to rotate through the cooperation between the plate body and the groove. The electric valve also includes an elastic body, which is provided at least on the contact surface of one of the plate body and the groove, thereby reducing the noise when the electric valve is working. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of an electric valve in one embodiment of the present invention;

[0009] Figure 2 for Figure 1 Assembly diagram of the rotor shaft, transmission plate, elastomer and input gear;

[0010] Figure 3 for Figure 1 Schematic diagram of the assembly of the transmission plate and the elastic body;

[0011] Figure 4 This is a schematic diagram of the transmission plate in one embodiment of the present invention.

[0012] in, Figures 1 to 4 middle:

[0013] 10 - Valve seat; 11a - External connection; 12a - External connection;

[0014] 20-Rotor component; 21-Rotor shaft; 22-Transmission plate; 22a-Receiving part; 22b-Fixing hole; 221-Base part; 222-Plate part; 23-Elastic body;

[0015] 31-Input gear; 311-Large diameter section; 312-Small diameter section; 31a-Groove; 31a1-Groove wall section; 31a2-Bottom wall; 31b-Mounting hole; 32-Gear ring; 321-Top wall; 322-Peripheral wall. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of an electric valve in one embodiment of the present invention; Figure 2 for Figure 1 Assembly diagram of the rotor shaft, transmission plate, elastomer and input gear; Figure 3 for Figure 1 Schematic diagram of the assembly of the transmission plate and the elastic body; Figure 4 This is a schematic diagram of the transmission plate in one embodiment of the present invention.

[0018] The present invention provides an electric valve, which includes a valve body and a coil, wherein the valve body is mainly used for flow regulation and the coil provides driving force.

[0019] The electric valve of the present invention includes a valve body, a valve seat, a coil, a rotor assembly 20, a transmission plate 22, and a gear reduction mechanism. The valve seat 10 has a first port and a second port, and a valve core is disposed inside the valve seat 10. The first port and the second port are connected through a through hole in the valve core. The first port and the second port are typically used for installing external connecting pipes, such as... Figure 1As shown, the first port is equipped with an external connecting pipe 11a, and the second port is equipped with an external connecting pipe 12a. The first port can be either a refrigerant inlet or a refrigerant outlet. Accordingly, when the first port is a refrigerant inlet, the second port is a refrigerant outlet; when the first port is a refrigerant outlet, the second port is a refrigerant inlet.

[0020] The external refrigerant flows from the external pipe of the first port (or the second port) into the valve seat 10, passes through the valve core, and then flows out through the external pipe of the second port (or the first port).

[0021] The rotor assembly 20 includes a rotor shaft 21, and a transmission plate 22 is fixedly connected to the transmission end of the rotor shaft 21. The rotor shaft 21 drives the input gear 31 of the gear reduction mechanism to rotate through the transmission plate 22. The main function of the gear reduction mechanism is to reduce the speed to obtain a suitable torque to drive the valve stem inside the valve body to rotate. The valve stem can drive the valve core to rotate, thereby realizing the opening and closing of the electric valve and the flow regulation function. There are various forms of gear reduction mechanisms. This article takes a planetary gear mechanism as an example to continue to introduce the technical solution and technical effects. Those skilled in the art should understand that the technical solution in this article is also applicable to other types of gear reduction mechanisms.

[0022] The electric valve in this invention also includes an elastic body 23, through which the transmission plate 22 elastically contacts the input gear 31 to achieve power transmission. That is, an elastic body 23 is provided on the contact surface between the transmission plate 22 and the input gear 31, and the transmission plate 22 elastically drives the input gear 31 to rotate through the elastic body 23.

[0023] When the electric valve of the present invention is working, the coil is energized to drive the rotor component to rotate, the rotor shaft 21 drives the transmission plate 22 to rotate synchronously, the transmission plate 22 elastically contacts the input gear 31 through the elastic body 23, and then transmits the rotational power to the input gear 31. The input gear 31 transmits the power to the valve stem through the transmission of each gear in the gear reduction mechanism, so as to realize the rotation of the valve stem and realize the opening and closing and flow regulation functions of the electric valve.

[0024] Compared with the prior art where the transmission plate 22 and the input gear 31 directly collide to transmit power, the transmission plate 22 and the input gear 31 in this invention achieve power transmission through elastic contact with the elastic body 23, which greatly reduces transmission noise, reduces noise pollution from the electric valve transmission, and is beneficial for the electric valve to be used in environments with strict noise requirements, thus improving the flexibility of the electric valve in use.

[0025] In one specific embodiment, one of the transmission plate 22 and the input gear 31 is provided with a groove, and the other is provided with a plate body inserted into the groove. The transmission plate 22 drives the input gear 31 to rotate through the cooperation between the plate body and the groove. The elastic body 23 is provided at least on the contact surface of one of the plate body and the groove.

[0026] In other words, the transmission plate 22 can be provided with a groove or a plate body, and the input gear 31 is provided with a plate body that is inserted into the groove of the transmission plate 22, or a groove that is inserted into the plate body of the transmission plate 22.

[0027] This article takes the example of setting a plate body on the transmission plate 22 and setting a groove on the input gear 31 to continue to introduce the technical solution.

[0028] Specifically, the transmission plate 22 may include a base portion 221 and a plate body portion 222 extending outward from the base portion 221. The base portion 221 is provided with a fixing hole 22b for fixed connection with the rotor shaft 21. The plate body portion 222 includes a side wall portion. The shape, extension length, and thickness of the plate body portion 222 can be reasonably set according to the specific application environment. The fact that the above parameters are not disclosed herein does not prevent those skilled in the art from understanding and implementing this technical solution.

[0029] The upper end of the input gear 31 in this paper is provided with a groove 31a, which can be open upwards or have other structural forms. The lower end of the input gear 31 is provided with a gear part, through which the input gear 31 meshes with the adjacent transmission gear to transmit power. The plate part 222 extends at least partially into the groove 31a, which includes a groove wall part 31a1 that can abut against the side wall part, and an elastic body 23 is disposed between the side wall part and the groove wall part 31a1.

[0030] In the above embodiments, the groove 31a is provided at the upper end of the input gear 31 and the gear part is provided at the lower end, which is conducive to the overall structural layout of the electric valve components, minimizes the volume of the electric valve, and improves its application flexibility.

[0031] In the above embodiments, the elastic body 23 can be an annular elastic ring, which can be an O-ring, a rectangular ring, or other types of ring structures. The sidewalls on both sides of the plate body are provided with inwardly recessed receiving portions 22a, on which the annular elastic ring is fitted. The shape of the receiving portion 22a can be adapted to the inner ring of the annular elastic ring.

[0032] Positioning the annular elastic ring on the transmission plate 22 ensures high positioning reliability and facilitates assembly and maintenance.

[0033] As described above, the opening of the groove 31a of the input gear 31 can face upwards. It should be noted that, here... Figure 1 The directions shown are for reference only and are intended to simplify the description of the technical solution.

[0034] The groove 31a includes two side walls and a bottom wall 31a2. The side walls have grooved portions 31a1, and the bottom wall 31a2 has a shape that mates with the outer circumferential wall of the annular elastic ring. Taking the annular elastic ring as an example of an O-ring, the bottom wall 31a2 can form an arc-shaped structure to fit the outer ring of the annular elastic ring. In another specific embodiment, the groove of the input gear 31 has an upward opening and includes two side walls and a bottom wall. The side walls have grooved portions, and the bottom wall 31a2 and the grooved portions 31a1 form a cavity for positioning and mounting the elastic body 23. In this embodiment, the elastic body 23 is mounted on the input gear 31.

[0035] In the above embodiments, the transmission plate 22 may include two plate parts 222. The two plate parts 222 are symmetrically arranged about the central axis of the fixing hole 22b of the base part 221. Correspondingly, the upper end of the input gear 31 is provided with two grooves for cooperating with the two plate parts 222 respectively. An elastic body 23 is provided between the side wall and the groove wall of each plate part 222.

[0036] The transmission plate 22 has two symmetrical plate sections, which can improve the stability of power transmission.

[0037] In one specific embodiment, the input gear 31 in the above embodiments may include a large-diameter portion 311 and a small-diameter portion 312 coaxially arranged. The large-diameter portion 311 is provided with a mounting hole 31b coaxial with the rotor shaft 21. The base portion 221 of the transmission plate 22 is at least partially located inside the mounting hole 31b. This document provides an embodiment in which the base portion 221 of the transmission plate 22 is completely located inside the mounting hole 31b. The peripheral wall of the mounting hole 31b has an upward-opening groove, and the outer peripheral wall of the small-diameter portion 312 is provided with a gear portion.

[0038] In the above embodiments, the planetary gear mechanism may include a gear ring 32, a sun gear and a planet gear assembly, the input gear 31 is the sun gear, the gear ring 32 is fixed to the valve body, the gear ring includes a top wall 321 and a peripheral wall 322 extending downward from the top wall 321, the peripheral wall 322 forms a cavity with an opening facing downward, the peripheral wall 322 is provided with an internal meshing section, and the internal meshing section of the gear ring 32 meshes with the corresponding planet gears of each stage.

[0039] The top wall of the gear ring 32 is provided with a through hole, and the small diameter portion 312 of the sun gear extends into the cavity through the through hole in the top wall. The stepped surface between the large diameter portion 311 and the small diameter portion 312 is rotatably supported on the outer side of the top wall of the gear ring.

[0040] The number of planetary gear assemblies can be determined based on the specific electric valve application; it can be one, two, or more. A planetary gear assembly includes a planet carrier and at least two planet gears. The planet carrier primarily supports the planet gears and transmits power. The main structure of the planet carrier can take various forms, which are not specifically limited in this article.

[0041] The electric valve provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. An electric valve, characterized in that, The device includes a valve body, a rotor assembly (20), a transmission plate (22), and a gear reduction mechanism. The rotor assembly (20) includes a rotor shaft (21). The transmission plate (22) is fixedly connected to the transmission end of the rotor shaft (21). The rotor shaft (21) can drive the transmission plate (22) to rotate. The input gear (31) of the gear reduction mechanism is provided with a groove (31a). The transmission plate (22) is provided with a plate body part (222) that inserts into the groove (31a). The transmission plate (22) is connected to the groove (31a) through the plate body part (222). The electric valve also includes an elastic body (23), which is an annular elastic ring. The plate part (222) includes a side wall part. Both sides of the side wall part of the plate part (222) are provided with an inwardly recessed receiving part (22a). The annular elastic ring is fitted onto the receiving part (22a). The transmission plate (22) is in elastic contact with the input gear (31) through the elastic body (23). The transmission plate (22) elastically drives the input gear (31) to rotate through the elastic body (23).

2. The electric valve as described in claim 1, characterized in that, The transmission plate (22) includes a base portion (221) and a plate body portion (222) extending outward from the base portion (221). The upper end of the input gear (31) is provided with the groove (31a), and the lower end is provided with a gear portion. The plate body portion (222) extends at least partially into the groove. The groove (31a) includes a groove wall portion that can abut against the side wall portion. The elastic body (23) is disposed between the side wall portion and the groove wall portion.

3. The electric valve as described in claim 2, characterized in that, The groove (31a) of the input gear (31) opens upward and includes two side walls and a bottom wall (31a2). The two side walls are provided with the groove wall portion (31a1), and the bottom wall has a shape that matches the outer circumferential wall of the annular elastic ring at the corresponding position.

4. The electric valve as described in claim 2, characterized in that, The annular elastic ring is a rubber ring or a silicone ring.

5. The electric valve as described in any one of claims 2 to 3, characterized in that, The transmission plate (22) includes two plate parts (222), which are symmetrically arranged about the central axis of the fixing hole (22b) of the base part. Correspondingly, the upper end of the input gear (31) is provided with two grooves (31a) for cooperating with the two plate parts (222) respectively. The elastic body (23) is provided between the side wall of each plate part (222) and the groove wall (31a1).

6. The electric valve as described in claim 5, characterized in that, The input gear (31) includes a large-diameter portion (311) and a small-diameter portion (312) arranged coaxially. The large-diameter portion (311) is provided with a mounting hole coaxial with the rotor shaft (21). The base portion (221) of the transmission plate (22) is at least partially located inside the mounting hole. The peripheral wall of the mounting hole is provided with the groove (31a) with an upward opening. The gear portion is provided on the outer peripheral wall of the small-diameter portion (312).

7. The electric valve as described in claim 6, characterized in that, The gear reduction mechanism is a planetary gear mechanism, which includes a gear ring (32), a sun gear, and a planet gear assembly. The input gear (31) is a sun gear. The gear ring (32) is supported and fixed to the valve body. The gear ring (32) includes a top wall (321) and a peripheral wall extending downward from the top wall (321). The peripheral wall of the gear ring (32) forms a cavity with an opening facing downward. The peripheral wall of the gear ring (32) is provided with an internal meshing section. The top wall (321) is provided with a through hole. The small diameter portion of the sun gear passes through the through hole of the top wall (321) and extends into the cavity. The stepped surface between the large diameter portion and the small diameter portion is rotatably supported on the outside of the top wall of the gear ring (32).

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