CN112145744B

CN112145744B - Transmission connection structure of electric switching valve and electric switching valve

Info

Publication number: CN112145744B
Application number: CN202010856005.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2015-12-07
Filing date: 2015-12-07
Publication date: 2022-09-09
Anticipated expiration: 2035-12-07
Also published as: CN112145744A; CN106838379A; CN106838379B

Abstract

The invention discloses a transmission connecting structure, which comprises a motor and a gear assembly; and the rotor shaft of the motor is flexibly connected with the first gear of the gear assembly. The structural design of the transmission connecting structure can reduce the requirement on the installation precision during the assembly of the gear assembly, and reduce the machining precision of related parts and the control precision of assembly, thereby reducing the manufacturing cost and improving the assembly qualification rate of products. The invention also discloses an electric valve with the transmission connection structure.

Description

Transmission connection structure of electric switching valve and electric switching valve

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to a transmission connecting structure of an electric switching valve and the electric switching valve with the transmission connecting structure.

Background

In a refrigeration cycle apparatus such as an air conditioning circuit, an electrically operated switching valve is generally employed as a control member for changing a refrigerant flow path.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a conventional electric switching valve.

The electric switching valve comprises a valve seat 101, an outer cover 102 fixedly arranged above the valve seat 101 and a shell 103 fixedly arranged above the outer cover 102, wherein end covers are fixedly connected to two ends of the shell 103, a lower end cover 105, the outer cover 102 and the valve seat 101 are matched to form a valve cavity, and an upper end cover 104, the lower end cover 105 and the shell 103 are matched to form an accommodating cavity.

A rotor 106 is arranged in the accommodating cavity, a coil component 107 is sleeved on the outer periphery of the shell 103, a rotor shaft 108 is fixedly inserted in the rotor 106, and the lower end of the rotor shaft 108 penetrates through the lower end cover 105 and extends into the valve cavity.

A gear assembly is arranged in the valve cavity, and specifically, the gear assembly comprises a first gear 109 fixedly sleeved at the lower end part of the rotor shaft 108, a second gear 110 meshed with the first gear 109, a third gear 111 meshed with the second gear 110, and a fourth gear 112 meshed with the third gear 111; the fourth gear 112 is connected to a slider 114 via a driving pin 113.

The third gear 111 is sleeved on a gear shaft 115 fixedly inserted in the valve seat 101, the second gear 110 is sleeved on the third gear 111, and the fourth gear 112 and the slider 114 are further sleeved on a fixed shaft 116 fixedly inserted in the valve seat 101.

Taking a three-way valve as an example, the valve seat 101 is provided with an inlet for flowing in the refrigerant, a first outlet and a second outlet for flowing out the refrigerant, and the slider 114 is attached to the upper end surface of the valve seat 101 in a sealing manner.

When the valve works, a pulse signal is input to the coil component 107 to drive the rotor 106 to rotate, the gear component rotates and transfers along with the rotation of the rotor shaft 108, and finally the driving pin 113 drives the sliding block 114 to rotate on the valve seat 101, so that the first output port or the second output port is selectively opened and closed, and the flow direction of a refrigerant is switched.

In the electric switching valve, the rotation of the slider 114 is mainly realized by the transmission of the gear assembly, and the gear transmission has higher requirements on the center distance and the parallelism between two gears.

In the above structure, the center position of the first gear 109 is ensured by the assembly among the housing 102, the housing 103, the upper end cover 104, the lower end cover 105 and the valve seat 101, and the center position of the second gear 110 engaged with the first gear 109 is ensured by the assembly of the valve seat 101 and the gear shaft 115, and obviously, the center distance between the two gears is relatively large in related dimension, and has high requirements on manufacturing process and assembly control precision of related parts, which results in relatively high manufacturing cost and relatively low assembly yield of products.

In view of this, how to improve the structure of the existing electric switching valve, which can not only improve the product assembly qualification rate, but also reduce the manufacturing cost, is a technical problem that needs to be solved by those skilled in the art at present.

Disclosure of Invention

The invention aims to provide a transmission connecting structure of an electric switching valve and the electric switching valve with the transmission connecting structure, wherein the transmission connecting structure can reduce related parts for assembling a gear assembly, reduce the processing precision and the assembling control precision of the related parts, and improve the assembling qualified rate of products while reducing the manufacturing cost.

In order to solve the technical problem, the invention provides a transmission connecting structure of an electric switching valve, which comprises a motor and a gear assembly; the rotor shaft of the motor is flexibly connected with the first gear of the gear assembly; the transmission plate is fixedly arranged at the bottom of the rotor shaft, and a groove is formed in the top of the first gear; the transmission plate is clamped in the groove, and a preset circumferential movement margin is reserved in the groove.

In the transmission connection structure of the electric switching valve, the transmission plate comprises a body part fixedly connected with the rotor shaft and a plate body part extending from the body part, and the two side walls of the groove matched with the plate body part form a preset included angle, so that the plate body part can be in surface contact with the two side walls when rotating.

The transmission plate comprises a body part fixedly connected with the rotor shaft and two plate body parts extending out of the body part, the body part is of a circular structure, and the two plate body parts are symmetrically arranged along the circumferential direction of the body part.

The invention also provides another transmission connecting structure of the electric switching valve, which comprises a motor and a gear assembly, wherein a rotor shaft of the motor is flexibly connected with a first gear of the gear assembly; the transmission plate is fixedly arranged at the bottom of the rotor shaft, two ends of the transmission plate are bent downwards to form accommodating parts, and the top of the first gear is of a multi-edge structure; the top of the first gear is arranged in the accommodating part, two bending edges of the transmission plate are matched with two side faces of the top of the first gear, and a preset gap is formed between each bending edge and the matched side face.

In the transmission connection structure of the electric switching valve, the top of the first gear is of a square structure.

In the transmission connection structure of the electric changeover valve, the two bending edges are respectively matched with the two opposite surfaces of the square structure, so that the transmission plate and the first gear can form surface contact.

In the transmission connection structure of the electric changeover valve, the rotor shaft and the transmission plate are welded and fixed.

According to the transmission connection structure of the electric switching valve, one end of the rotor shaft, which is connected with the transmission plate, is provided with the cylindrical step, the step surface of the cylindrical step faces the transmission plate, the transmission plate is provided with the through hole matched with the cylindrical step, the cylindrical step is inserted into the transmission plate, and the step surface is attached to the plate surface of the transmission plate.

The invention also provides an electric switching valve, which comprises the transmission connecting structure, a valve seat, an outer cover fixedly arranged above the valve seat and a shell fixedly arranged above the outer cover, wherein a partition plate is fixedly arranged at the bottom of the shell, the partition plate, the outer cover and the valve seat form a valve cavity, an accommodating cavity is formed by the partition plate and the shell, a rotor of the motor is arranged in the accommodating cavity, a rotor shaft is fixedly inserted in the rotor, and the lower end of the rotor shaft penetrates through the partition plate and extends into the valve cavity.

According to the transmission connecting structure of the electric switching valve, the rotor shaft of the motor is flexibly connected with the first gear of the gear assembly, the flexible connection means that a certain movement margin is formed between the first gear and the rotor shaft, the first gear and the rotor shaft are not fixed, but the power transmission between the first gear and the rotor shaft is not influenced, so that when the transmission connecting structure is applied to devices such as the electric switching valve, the requirement on the installation precision of the gear assembly is low, the requirements on the machining and assembly control precision of related parts are relatively low, the manufacturing cost can be further reduced, and the assembly efficiency and the assembly qualification rate are improved.

Drawings

Fig. 1 is a schematic cross-sectional view of a conventional electric switching valve;

FIG. 2 is a schematic cross-sectional view of an electrical switch valve at one angle in accordance with an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of an electric switch valve at another angle in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a first connection of the rotor shaft to a first gear of the gear assembly of FIG. 2;

FIG. 5 is a schematic view of the rotor shaft and drive plate connection of FIG. 4;

FIG. 6 is a schematic view of the first gear of FIG. 4;

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a schematic view of a second connection of the rotor shaft to the first gear of the gear assembly of FIG. 2;

FIG. 9 is a schematic cross-sectional view of FIG. 8;

FIG. 10 is a schematic view of the drive plate of FIG. 8;

FIG. 11 is a schematic view of the first gear of FIG. 8;

fig. 12 is a schematic structural view of the liner plate in fig. 2.

Wherein, the one-to-one correspondence between component names and reference numbers in fig. 1 is as follows:

a valve seat 101, a housing 102, a casing 103, an upper end cover 104, a lower end cover 105, a rotor 106, a coil component 107, a rotor shaft 108, a first gear 109, a second gear 110, a third gear 111, a fourth gear 112, a transmission pin 113, a slider 114, a gear shaft 115, and a fixed shaft 116;

the one-to-one correspondence between component names and reference numbers in fig. 2 to 12 is as follows:

valve seat 21, slider 22, housing 23, housing 24, partition 25;

a magnetic rotor 31, a rotor shaft 32, transmission plates 33 and 33 ', a bent edge 33 ' 1 and a containing part 33 ' a;

the gear mechanism comprises a first gear 41, 41', a groove 41a, a second gear 42, a third gear 43, a fourth gear 44, a lining plate 45, a bearing hole 45a, a gear shaft hole 45b, a bearing 46, a gear shaft 47 and a fixed shaft 48.

Detailed Description

The core of the invention is to provide a transmission connecting structure of an electric switching valve and the electric switching valve with the transmission connecting structure, the transmission connecting structure can reduce related parts for assembling gear components, and reduce the processing precision and the control precision of assembling of the related parts, thereby reducing the manufacturing cost and improving the assembly qualification rate of products.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 2-3, fig. 2 is a schematic cross-sectional view of an electric switching valve according to an embodiment of the present invention; fig. 3 is a schematic cross-sectional view of an electric switch valve at another angle according to an embodiment of the present invention.

In this embodiment, the electric switching valve includes a valve seat 21, an outer cover 23 fixed above the valve seat 21, and a housing 24 fixed above the outer cover 23, and in the specific embodiment, the housing 24 is in a sleeve shape and has a sealed top. Wherein, the bottom of the shell 24 is fixedly provided with a partition plate 25, so that the partition plate 25, the outer cover 23 and the valve seat 21 form a valve cavity, and the partition plate 25 and the shell 24 form an accommodating cavity.

Wherein, the accommodating cavity is provided with a magnetic rotor 31 of the motor, a coil (not shown in the figure) of the motor is sleeved outside the shell 24, the rotor shaft 32 is fixedly inserted in the rotor 31, and the lower end of the rotor shaft passes through the partition plate 25 and extends into the valve cavity.

It will be appreciated that the components forming the valve chamber and the receiving chamber can take a variety of configurations and are not limited to those described and illustrated in the drawings.

The valve cavity is internally provided with a gear assembly and a sliding block 22, wherein the gear assembly can drive the sliding block 22 to rotate on the valve seat 21 under the driving of the motor so as to open and close one of a plurality of output ports on the valve seat 21, thereby switching the flow direction of a refrigerant.

When the magnetic valve works, a pulse signal is input to a coil of the motor, the magnetic rotor 31 only needs to rotate by a necessary amount, and the gear assembly rotates and transmits along with the rotation of the rotor shaft 32, so that the sliding block 22 can rotate on the valve seat 21.

In this embodiment, the rotor shaft 32 of the motor is flexibly connected with the first gear 41 of the gear assembly, that is, there is a certain movement margin between the rotor shaft 32 and the first gear 41, and there is no fixed dead, and obviously, the flexible connection should not affect the rotation transmission between the rotor shaft 32 and the first gear 41.

The electric changeover valve is arranged as described above such that the center position of the first gear 41 is not limited by the rotor shaft 32, and accordingly, is not limited by the accuracy of assembling the cover 23, the housing 24, and the cover 23 fitted to the rotor shaft 32, and the housing 24 and the valve seat 21, and therefore, at the time of setting, the central position of the first gear 41 may be associated only with the valve seat 21 component, compared with the prior art, the scheme avoids the problems of poor gear engagement or locking caused by the deflection of the rotor shaft 32 or low assembly precision, improves the assembly qualification rate, and, the associated parts of the central position of the first gear 41 are significantly reduced, that is, the associated size of the center distance between the first gear 41 and the second gear 42 engaged therewith is also significantly reduced, therefore, the processing and assembling control precision of related parts can be properly relaxed, the manufacturing cost can be further reduced, and the assembling efficiency and the assembling qualified rate can be improved.

The specific implementation manner of the flexible connection between the rotor shaft 32 and the first gear 41 can be various. Referring to fig. 4, a schematic structural diagram of a first connection manner between the rotor shaft and the first gear in fig. 2 is shown.

In this specific embodiment, the bottom (the end located in the valve cavity) of the rotor shaft 32 is fixedly provided with the transmission plate 33, the top of the first gear 41 is provided with a groove 41a, during assembly, the transmission plate 33 is clamped in the groove 41a, and the transmission plate 33 has a predetermined circumferential movement margin in the groove 41 a.

In operation, when the rotor shaft 32 rotates, the transmission plate 33 rotates therewith and pushes the first gear 41 to rotate in the circumferential direction.

As will be understood in conjunction with fig. 5-7, fig. 5 is a schematic view of the rotor shaft and drive plate connection of fig. 4; FIG. 6 is a schematic view of the first gear of FIG. 4; fig. 7 is a top view of fig. 6.

More specifically, the drive plate 33 includes a body portion fixedly connected to the rotor shaft 32 and a plate body portion extending in a radial direction of the body portion, the body portion having a substantially circular configuration; as shown in the figures, in this embodiment, there are two plate body portions symmetrically arranged along the circumferential direction of the main body portion, that is, the two plate body portions are located on a certain diameter line of the main body portion, so that the force transmission is balanced when the plate body rotates.

Of course, it is also possible that the body portion is not provided with a circular configuration.

Accordingly, the outer contour of the groove 41a of the first gear 41 matches the outer contour of the transmission plate 33, and it is apparent that the size of the portion of the groove 41a that engages with the plate body portion of the transmission plate 33 is larger than the size of the transmission plate 33 in order to allow the transmission plate 33 to have a margin of circumferential movement within the groove 41 a.

More specifically, the groove 41a and the two side walls of the plate body part are formed with a predetermined included angle a, as shown in fig. 7, so that the plate body part can be in surface contact with the two side walls when the rotor shaft 32 is driven to rotate, and thus, the transmission effect between the transmission plate 33 and the first gear 41 can be improved.

It should be understood that, in order to enable the plate body portion to come into surface contact with the mating side wall, both side walls of the groove 41a can be formed in a flared form only outward in the radial direction of the first gear 41.

When the device is specifically arranged, the circumferential movement margin and the range of the preset included angle a can be set according to actual requirements.

Referring to fig. 8, a second connection mode of the rotor shaft and the first gear is shown.

In the specific scheme, a transmission plate 33 'is fixedly arranged at the bottom (the end located in the valve cavity) of the rotor shaft 32, two ends of the transmission plate 33' are both bent downwards to form an accommodating part 33 'a, and the top of the first gear 41' is of a multi-edge structure; when assembling, the top of the first gear 41 'is placed in the accommodating portion 33' a, the two bent edges 33 '1 of the transmission plate 33' are matched with the two side surfaces of the top of the first gear 41 ', and a preset gap is formed between each bent edge 33' 1 and the matched side surface, as shown in fig. 9, and fig. 9 is a schematic sectional view of fig. 8.

In operation, when the rotor shaft 32 rotates, the driving plate 33 'rotates along with the rotor shaft, and pushes the side surface of the top of the first gear 41' engaged with the driving plate by means of one of the bent edges 33 '1, thereby pushing the first gear 41' to rotate.

As can be appreciated in conjunction with fig. 10-11, fig. 10 is a schematic view of the drive plate of fig. 8;

fig. 11 is a schematic structural view of the first gear in fig. 8.

More specifically, the transmission plate 33 'includes a plate body fixedly connected to the rotor shaft 32, two ends of the plate body are bent downward to form bent edges 33' 1, and the two bent edges 33 '1 and the plate body form an accommodating portion 33' a; the top of the first gear 41' may be provided with a square structure, as shown in fig. 11. The top of the first gear 41 ' extends into the accommodating portion 33 ' a, and the two bent edges 33 ' 1 are respectively matched with the two opposite surfaces of the square structure, so that surface contact between the transmission plate 33 ' and the first gear 41 ' can be ensured, and the transmission effect of the two gears is improved.

It should be understood that the top of the first gear 41 ' may have other multi-edge structures, and the number of the bent edges 33 ' 1 of the driving plate 33 ' may be three or more as long as the driving plate 33 ' is matched with the first gear 41 ' to realize the rotation transmission.

When the device is specifically arranged, the preset gap can be set according to actual requirements.

In the two connection modes of the rotor shaft and the first gear, the fixing of the rotor shaft 32 and the transmission plates 33 and 33' can be realized by the following modes: the bottom of the rotor shaft 32 is provided with a cylindrical step, the step surface faces the transmission plates 33 and 33 ', the transmission plates 33 and 33' are provided with through holes matched with the cylindrical step, during assembly, the cylindrical step of the rotor shaft 32 is inserted into the through holes of the transmission plates 33 and 33 ', the step surface is attached to the plate surfaces of the transmission plates 33 and 33', and after assembly, the cylindrical step and the transmission plates 33 and 33 'are welded and fixed, so that the circumferential torsion and the axial strength of the transmission plates 33 and 33' and the rotor shaft 32 are ensured. Of course, other reliable fastening means may be used in practice.

In a specific scheme, the electric switching valve further comprises a lining plate 45, the lining plate 45 is relatively fixed with the valve seat 21 through a fixing shaft 48, after assembly, the lining plate 45 and the valve seat 21 have a certain interval, and the lining plate 45 and the valve seat are relatively parallel, as shown in fig. 2-3.

The first gear 41 is inserted in the lining plate 45, a gear shaft 47 is further arranged between the lining plate 45 and the valve seat 21, specifically, one end of the gear shaft 47 is inserted in the lining plate 45, the other end of the gear shaft 47 is inserted in the valve seat 21, and the second gear 42 meshed with the first gear 41 is sleeved on the gear shaft 47.

With such an arrangement, the center distance between the first gear 41 and the second gear 42 and the mutual cooperation among the lining plate 45, the valve seat 21 and the gear shaft 47 are ensured, and compared with the background art, the related dimension is relatively small, so that the manufacturing process cost of related parts can be greatly reduced.

In a specific embodiment, in order to ensure the stability of the transmission of the first gear 41, a bearing 46 may be disposed between the first gear 41 and the lining plate 45, as shown in fig. 2.

Referring to fig. 12, fig. 12 is a schematic structural view of the liner plate in fig. 2.

As shown in the figure, the lining plate 45 is provided with a bearing hole 45a matched with the bearing 46, a gear shaft hole 45b matched with the gear shaft 47, and a fixing shaft hole (not marked in the figure) matched with the fixing shaft 48, and all the holes can be formed by die stamping to ensure the position precision and the consistency reliability.

In this embodiment, the gear assembly further includes a third gear 43 engaged with the second gear 42, and a fourth gear 44 engaged with the third gear 43, and the fourth gear 44 is in transmission connection with the slider 22.

The structural form of each gear of the gear assembly can be set according to actual needs, the number of gears of the gear assembly, the number of formed gear pairs and the like can be set according to actual needs, and the gear assembly can be designed by referring to the prior art, and is not elaborated one by one.

The transmission connection structure of the electric changeover valve and the electric changeover valve having the same according to the present invention have been described in detail. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A transmission connecting structure of an electric switching valve comprises a motor and a gear assembly; the gear assembly can drive a sliding block of the electric switching valve to rotate on a valve seat under the driving of the motor so as to open and close one of a plurality of output ports on the valve seat; characterized in that the rotor shaft (32) of the motor is flexibly connected with the first gear (41) of the gear assembly; the transmission device further comprises a transmission plate (33) fixedly arranged at the bottom of the rotor shaft (32), and a groove (41 a) is formed in the top of the first gear (41); the transmission plate (33) is clamped in the groove (41 a), and the transmission plate (33) has a preset circumferential movement margin in the groove (41 a).

2. The transmission connection structure of an electric switching valve according to claim 1, wherein the transmission plate (33) includes a body portion fixedly connected to the rotor shaft (32) and a plate portion extending from the body portion, and the groove (41 a) forms a predetermined included angle (a) with two sidewalls engaged with the plate portion, so that the plate portion can be in surface contact with the two sidewalls when rotating.

3. The transmission connection structure of an electric switching valve according to claim 1, wherein the transmission plate (33) includes a body portion fixedly connected to the rotor shaft (32) and two plate body portions extending from the body portion, the body portion is of a circular structure, and the two plate body portions are symmetrically arranged along a circumferential direction of the body portion.

4. A transmission connecting structure of an electric switching valve comprises a motor and a gear assembly, wherein the gear assembly can drive a sliding block of the electric switching valve to rotate on a valve seat under the driving of the motor so as to open and close one of a plurality of output ports on the valve seat; characterized in that the rotor shaft (32) of the motor is flexibly connected with a first gear (41') of the gear assembly; the rotor comprises a rotor shaft (32), a first gear (41 ') and a second gear (33'), wherein the rotor shaft is arranged on the rotor shaft, the first gear is arranged on the rotor shaft, the second gear is arranged on the second gear, the first gear is arranged on the second gear, the second gear is arranged on the rotor shaft, and the second gear is arranged on the rotor shaft; the top of the first gear (41 ') is placed in the accommodating part (33' a), two bent edges (33 '1) of the transmission plate (33') are matched with two side surfaces of the top of the first gear (41 '), and a preset gap is reserved between each bent edge (33' 1) and the matched side surface.

5. The transmission connection structure of an electric switching valve according to claim 4, wherein the top of the first gear (41') is a square structure.

6. The transmission connection structure of an electric switching valve according to claim 5, wherein the two bent edges (33 ' 1) are respectively engaged with two opposite surfaces of the square structure to enable surface contact between the transmission plate (33 ') and the first gear (41 ').

7. The transmission connection structure of an electric switching valve according to any one of claims 1 to 6, wherein the rotor shaft (32) is welded and fixed to the transmission plate (33, 33').

8. The transmission connection structure of an electric switching valve according to claim 7, wherein the end of the rotor shaft (32) connected to the transmission plate (33, 33 ') has a cylindrical step, the step surface of the cylindrical step faces the transmission plate (33, 33 '), the transmission plate (33, 33 ') has a through hole matching the cylindrical step, the cylindrical step is inserted into the transmission plate (33, 33 '), and the step surface is attached to the plate surface of the transmission plate (33, 33 ').

9. An electric switching valve, comprising the transmission connection structure of any one of claims 1 to 8, further comprising a valve seat, a housing fixed above the valve seat, and a housing fixed above the housing, wherein a partition is fixed at the bottom of the housing, the partition, the housing, and the valve seat form a valve cavity, the partition and the housing form a receiving cavity, a rotor of the motor is arranged in the receiving cavity, the rotor shaft is fixedly inserted into the rotor, and the lower end of the rotor shaft penetrates through the partition and extends into the valve cavity.