Electric valve

Abstract

The utility model discloses an electric valve which comprises a driving component, a gear ring and a support, the driving component comprises a rotating shaft, at least part of the gear ring and at least part of the support are located in a valve cavity of the electric valve, the gear ring supports the support, the support is provided with a through hole, the rotating shaft penetrates through the through hole, and the rotating shaft penetrates through the through hole. One of the support and the gear ring comprises a concave part, the other one of the support and the gear ring comprises a convex part, at least part of the convex part is located in the concave part, and in the circumferential direction of the support, the convex part can abut against the wall of the concave part to limit rotation of the support relative to the gear ring. Rotation of the support relative to the gear ring is limited through the concave-convex matching structure, friction between the support and other parts due to rotation can be avoided, and therefore the output force of the driving component is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control valves for refrigeration systems, and particularly to an electric valve. Background Art

[0002] Figure 1 A cross-sectional schematic diagram of an electric valve is taken as the background art.

[0003] As shown in the figure, the electric valve includes a rotor housing 01, a rotor component 02 located inside the rotor housing 01, a support frame 03, and a coil 04. The rotor component 02 includes a rotating shaft 021 and a rotor 022, and the rotating shaft 021 and the rotor 022 are fixedly connected. The coil 04 is sleeved outside the rotor housing 01, and when the coil 04 is energized, it can drive the rotor 022 to rotate, thereby driving the rotating shaft 021 to rotate. In this structure, to ensure the rotational stability of the rotating shaft 021, the upper section of the rotating shaft 021 is centered by a bearing 05, and the lower section of the rotating shaft 021 passes through the positioning hole 031 of the support frame 03 for positioning, that is, its lower section is positioned by the support frame 03. The support frame 03 is made by processing a thin-walled metal part, and the support frame 03 and the rotor housing 01 are in interference fit by press-fitting. Due to the interference fit method, on the one hand, it is difficult to press-fit the two during press-fitting, and on the other hand, the positioning hole 031 of the support frame 03 may be offset after press-fitting, resulting in the skew of the rotating shaft 021. Summary of the Utility Model

[0004] After discovering the above problems, the inventor proposed an improvement plan: the support frame and the rotor housing adopt a loose fit plan. However, during the product testing process, it was found that when the two are in loose fit, in order to improve the positioning accuracy, the gap between the rotating shaft and the positioning hole is set to be small, resulting in the rotating shaft sometimes driving the support frame to rotate. When the support frame rotates, it rubs against the rotor housing, resulting in a decrease in the output force of the rotor component and affecting the reliability of the transmission.

[0005] In view of this, the present application provides an electric valve, including: a driving component, a gear ring, and a bracket. The driving component includes a rotating shaft. At least part of the gear ring and the bracket are located in the valve cavity of the electric valve. The gear ring supports the bracket. The bracket has a through hole, and the rotating shaft passes through the through hole. One of the bracket and the gear ring includes a concave portion, and the other of the bracket and the gear ring includes a convex portion. At least part of the convex portion is located in the concave portion. In the circumferential direction of the bracket, the convex portion can abut against the wall of the concave portion to limit the rotation of the bracket relative to the gear ring.

[0006] The present application limits the rotation of the bracket relative to the gear ring through the concave-convex fit structure, which can prevent the bracket from rubbing against other components due to rotation, thereby ensuring the output force of the driving component.

[0007] The present application also provides an electric valve, which includes a driving component, a gear ring, a bracket, and a connecting rod. The driving component includes a rotating shaft. The gear ring and the bracket are located in the valve cavity of the electric valve. The gear ring supports the bracket. The bracket has a through hole, and the rotating shaft passes through the through hole. The gear ring has a first connection hole, and the bracket has a second connection hole. A part of the connecting rod is located in the first connection hole, and another part of the connecting rod is located in the second connection hole.

[0008] Through the matching structure of the connecting rod with the first connection hole and the second connection hole, the present application restricts the rotation of the bracket relative to the gear ring, which can avoid the friction between the bracket and other components due to rotation, thus ensuring the reliability of the transmission. Description of the Drawings

[0009] Figure 1 It is a schematic cross-sectional view of an electric valve in the background art;

[0010] Figure 2 It is a schematic cross-sectional view of an electric valve provided by the present utility model;

[0011] Figure 3 For Figure 2 The enlarged schematic view at X in

[0012] Figure 4 For Figure 2 The three-dimensional structure schematic view of the gear ring in

[0013] Figure 5 For Figure 2 The three-dimensional structure schematic view of the bracket in

[0014] Figure 6 For Figure 2 The matching structure schematic view of the gear ring and the bracket in

[0015] Figure 7 It is the matching cross-sectional view of the rotor component, the bracket, the sleeve, and the gear ring;

[0016] Figure 8 It is the three-dimensional structure schematic view of another gear ring;

[0017] Figure 9 It is the three-dimensional structure schematic view of another bracket;

[0018] Figure 10A For Figure 8 In Figure 9 The matching structure schematic view of the gear ring and the

[0019] Figure 10B For Figure 10A The cross-sectional schematic view of the matching structure in

[0020] Figure 11Schematic perspective view of the third type of gear ring;

[0021] Figure 12 Schematic perspective view of the third type of bracket;

[0022] Figure 13 is Figure 11 the mating structure diagram of the gear ring in Figure 12 and the middle bracket. Detailed implementation manner

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following further details the present application in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Figure 2 Schematic cross-sectional view of an electric valve provided by the present utility model; Figure 3 is Figure 2 the enlarged schematic view at X in Figure 4 is Figure 2 the schematic perspective view of the gear ring in Figure 5 is Figure 2 the schematic perspective view of the middle bracket; Figure 6 is Figure 2 the mating structure diagram of the gear ring and the bracket in Figure 7 is the mating cross-sectional view of the rotor component, bracket, sleeve and gear ring.

[0025] As shown in the figure, the electric valve of this embodiment includes a housing component 1, a driving component 2, a planetary gear mechanism 3 and a bracket 4. The housing component 1 includes a sleeve 11 and a housing body 12. The sleeve 11 is made of stainless steel and is in the shape of a bottomed cylinder. The housing body 12 is also made of stainless steel and is fixedly connected to the sleeve 11. The driving structure 2 includes a rotating shaft 21 and a rotor 22. At least part of the rotating shaft 21 is located inside the sleeve 11, the rotor 22 is located inside the sleeve 11, the rotating shaft 21 is fixedly connected to the rotor 22, and the rotation of the rotor 22 can drive the rotation of the rotating shaft 21.

[0026] The planetary gear mechanism 3 includes a ring gear 31 and planetary gears 32 located inside the ring gear. The ring gear 31 is located inside the above-mentioned housing body 12, and the ring gear 31 is fixedly connected or circumferentially limited to the housing body 12, that is, the ring gear 31 does not rotate relative to the housing body 12. The ring gear 31 includes a base body 30 and a support portion 311 located at the upper end of the base body 30. The base body 30 is cylindrical. The bracket 4 is made of plastic, that is, the bracket 4 is formed by plastic injection molding. The bracket 4 is located in the valve cavity 10 of the electric valve, and the bracket 4 is in an inverted cup shape. In the longitudinal direction of the electric valve, the support portion 311 supports the bracket 4. The bracket 4 includes a top portion 41 and a base portion 42. The top portion 41 has a through hole 410, and the rotating shaft 21 passes through the through hole 410. The base portion 42 is cylindrical, and at least part of the base portion 42 is located inside the sleeve 11. The outer peripheral wall of the base portion 42 is in clearance fit with the inner peripheral wall of the sleeve 11. On this basis, one of the bracket 4 and the ring gear 31 includes a concave portion, and the other of the bracket 4 and the ring gear 31 includes a convex portion. The convex portion is at least partially located in the concave portion. In the circumferential direction of the bracket 4, the convex portion can abut against the wall of the concave portion to limit the rotation of the bracket 4 relative to the ring gear 31.

[0027] In this embodiment, since a clearance fit is adopted between the base portion 42 and the sleeve 11, an anti-rotation structure needs to be provided between the bracket 4 and the ring gear 31. Specifically, one of the bracket 4 and the ring gear 31 is provided with a concave portion, and the other is provided with a convex portion. The rotation of the bracket 4 relative to the ring gear 31 is restricted by the concave-convex fit structure. With this arrangement, the bracket 4 will not rotate with the rotating shaft 21, that is, it avoids the friction between the bracket 4 and the sleeve 11 and the ring gear 31 due to rotation, thereby ensuring the output force of the driving component 2, that is, ensuring the reliability of the transmission. On the other hand, it can also reduce the noise generated by friction, thereby reducing the working noise of the electric valve.

[0028] As a specific implementation manner, as Figure 4 , Figure 5 and Figure 6 shown, the support portion 311 includes a convex portion 312 protruding upward along the axial direction of the rotating shaft 21. The convex portion 312 is in a circular ring shape with a notch. The outer peripheral wall of the convex portion 312 is in clearance fit with the inner peripheral wall of the sleeve 11. In this embodiment, the ring gear 31 is circumferentially limited to the housing component 1, and the circumferential limiting structure is arranged at the lower section of the ring gear 31. By setting the outer peripheral wall of the convex portion 312 in clearance fit with the inner peripheral wall of the sleeve 11, the overall coaxiality of the ring gear 31 and the sleeve 11 is improved, thereby improving the transmission stability of the following transmission member 5 and the planetary gear 32. As Figure 4 shown, the number of the convex portions 312 is at least two, and there is a first notch 3120 between adjacent convex portions 312, that is, the depth of the notch is greater than or equal to the height of the convex portion 312. Or the convex portion 312 has a first notch 3120, the depth of the notch is less than the height of the convex portion 312, and the first notch 3120 serves as the above-mentioned concave portion. As Figure 5As shown, the bracket 4 includes a downward extension 43. The downward extension 43 protrudes downward along the axial direction of the rotating shaft 21 from the base portion 42. At least a part of the downward extension 43 is located in the first notch 3120, and the downward extension 43 serves as the above-mentioned convex portion. In this embodiment, the gear ring 31 is made by metal powder metallurgy or plastic injection molding, and the bracket 4 is made by plastic injection molding, and the concave-convex structure is convenient to set up.

[0029] Of course, it can be conceived that the supporting portion 311 may also include a blind hole or a through hole, and the downward extension 43 of the bracket 4 is inserted into the blind hole or the through hole, which can also limit the rotation of the bracket 4 relative to the gear ring 31.

[0030] Furthermore, the supporting portion 311 further includes a partition portion 313. The partition portion 313 is in a plate shape, and the above-mentioned convex portion 312 protrudes upward from the partition portion 313. The partition portion 313 includes a recessed portion 3131, and the recessed portion 3131 communicates with the above-mentioned first notch 3120. Correspondingly, the bracket 4 further includes a side extension 44. The side extension 44 extends radially outward from the downward extension 43 along the radial direction of the base portion 42. At least a part of the side extension 44 is located in the recessed portion 3131, and the side extension 44 can abut against the side wall 3132 of the recessed portion 3131. With such a setting, the abutting area for restricting the rotation of the bracket 4 relative to the gear ring 31 is increased, and the anti-rotation effect can be further improved.

[0031] As Figure 7 shown, the side extension 44 is located below the sleeve 11. Along the longitudinal direction of the electric valve, the distance between the upper surface of the side extension 44 and the lower end surface of the sleeve 11 is defined as h1, and the distance between the bottom wall 3133 of the recessed portion 3131 and the upper end surface of the convex portion 312 is defined as h2, then it satisfies: h1 < h2. With such a setting, in the longitudinal direction of the electric valve, the bracket 4 is limited by the gear ring 31 and the sleeve 11, and the bracket 4 will not come out of the first notch 3120 of the convex portion 312, thereby ensuring the reliability of the electric valve product.

[0032] Furthermore, as Figure 2 、 Figure 4 shown, the partition portion 313 has a central hole 3130. In the radial direction of the base portion 42, the central hole 3130 is located inside the convex portion 312, and the above-mentioned recessed portion 3131 extends radially inward along the base portion 42 to the central hole 3130. The beneficial effect is that since the following transmission member 5 is directly located on the partition portion 313, and in order to control the longitudinal movement amount of the bracket 4 along the electric valve, the distance h1 between the upper surface of the side extension 44 and the lower end surface of the sleeve 11 is often set to be small. By extending the recessed portion 3131 to the central hole 3130, the refrigerant retained in the annular region Q can be discharged to the central hole 3130 through the recessed portion 3131, so that the annular region Q will not form a closed cavity, ensuring the safety of the electric valve product. Of course, it can also be as Figure 6As shown, the partition portion 313 further includes a communication hole 314. The communication hole 314 is located below the annular region Q, and the communication hole 314 can discharge the refrigerant retained in the annular region Q into the gear ring 31.

[0033] Furthermore, as Figure 3 shown, the electric valve of this embodiment further includes a transmission member 5. The rotating shaft 21 is rotatably connected to the transmission member 5, that is, the rotation of the rotating shaft 21 can drive the transmission member 5 to rotate. Specifically, the transmission member 5 includes a large-diameter portion 51 and a small-diameter portion 52. In the radial direction of the base portion 42, the large-diameter portion 51 is located inside the convex portion 312. The large-diameter portion 51 includes an annular portion 511 protruding toward the partition portion 313. The lower end surface of the annular portion 511 is a small plane or an arc surface, and the lower end surface of the annular portion 511 contacts the upper surface of the partition portion 313. With such a setting, the friction during the rotation of the transmission member 5 can be reduced, thereby ensuring the output force of the driving component 2. The small-diameter portion 52 penetrates the central hole 3130, and the outer peripheral wall of the small-diameter portion 52 includes a sun gear portion 521. The sun gear portion 521 meshes with the planet gear 32, so as to transmit the output force of the driving component 2 to the planetary gear mechanism 3 through the transmission member 5.

[0034] In this embodiment, as Figure 2 、 Figure 5 shown, the outer diameter of the top portion 41 is smaller than the inner diameter of the rotor 22, and the top portion 41 is at least partially located inside the rotor 22. The base portion 42 is located below the rotor 22. The beneficial effect is that the longitudinal length of the electric valve can be reduced, which is beneficial to the miniaturization of the electric valve.

[0035] Figure 8 is a three-dimensional structural schematic diagram of another gear ring; Figure 9 is a three-dimensional structural schematic diagram of another bracket; Figure 10A is Figure 8 the mating structure schematic diagram of the gear ring in Figure 9 and the bracket in Figure 10B is Figure 10A the cross-sectional schematic diagram of the mating structure in

[0036] As shown in the figure, the difference between this embodiment and the above embodiment lies in the anti-rotation structure of the gear ring and the bracket. In this embodiment, the support portion 311A of the gear ring 31A includes a partition portion 313A, a protrusion portion 312A, and the aforementioned convex portion 315. The partition portion 313A is plate-shaped, and the protrusion portion 312A and the convex portion 315 protrude upward along the axial direction of the rotating shaft 21. The base portion 42A is annular. In the radial direction of the base portion 42A, the convex portion 315 is located outside the protrusion portion 312A, and the inner peripheral wall of the base portion 42A is in clearance fit with the outer peripheral wall of the protrusion portion 312A. Since the outer peripheral wall of the base portion 42A is in clearance fit with the inner peripheral wall of the sleeve 11, on this basis, by making the inner peripheral wall of the base portion 42A in clearance fit with the outer peripheral wall of the protrusion portion 312A, the overall coaxiality of the gear ring 31A and the sleeve 11 is improved. On the other hand, the base portion 42A has a recess 420A, and the opening of the recess 420A faces the partition portion 313, and such a setting can achieve anti-rotation of the bracket 4A relative to the gear ring 31A.

[0037] Further, as Figure 9 shown, the bracket 4A further includes a side extension portion 44A. The side extension portion 44A extends radially outward from the base portion 42A and is located below the sleeve 11, and can limit the displacement of the bracket 4A along the longitudinal direction of the electric valve. As Figure 8 、 Figure 9 shown, the side extension portion 44A has a second notch 440A, and the second notch 440A communicates with the above-mentioned recess 420A. In this embodiment, the above-mentioned convex portion 315 is specifically a rectangular convex block. A part of the convex portion 315 is located in the recess 420A, and another part of the convex portion 315 is located in the second notch 440A. In this way, the anti-rotation effect of the bracket 4A relative to the gear ring 31A can be further improved. Of course, the shape of the convex portion 315 can also be other shapes, as long as it can cooperate with the above-mentioned recess 420A and the second notch 440A for anti-rotation.

[0038] In addition, it can be thought that the side extension portion 44A can also be provided with a blind hole or a through hole, and at least part of the convex portion 315 is located in the blind hole or the through hole, which can also limit the rotation of the bracket 4A relative to the gear ring 31A.

[0039] Figure 11 is a three-dimensional structure schematic diagram of the third gear ring; Figure 12 is a three-dimensional structure schematic diagram of the third bracket; Figure 13 is Figure 11 the Figure 12 cooperating structure schematic diagram of the gear ring and the

[0040] As shown in the figure, the gear ring 31B includes a first connection hole 310B, and the first connection hole 310B includes a hole bottom. The bracket 4B is in an inverted cup shape and includes a top 41B, a base portion 42B, and a side extension portion 44B. The top 41B has the aforementioned through hole 410. The base portion 42B is located inside the sleeve 11, and the outer peripheral wall of the base portion 42B is in clearance fit with the inner peripheral wall of the sleeve 11. The side extension portion 44B extends radially outward from the base portion 42B. The side extension portion 44B has a second connection hole 440B, and the second connection hole 440B is a through hole. In the longitudinal direction of the electric valve, the second connection hole 440B is located above the first connection hole 310B. The electric valve of this embodiment further includes a connecting rod 6. The connecting rod 6 is cylindrical. The connecting rod 6 passes through the second connection hole 440B, that is, a part of the connecting rod 6 is located in the second connection hole 440B, and another part of the connecting rod 6 is located in the first connection hole 310B. The hole bottom of the first connection hole 310B can support the connecting rod 6. Further, in the longitudinal direction of the electric valve, the connecting rod 6 is located below the sleeve 11. With such a setting, even if the connecting rod 6 moves longitudinally in the electric valve, the sleeve 11 can limit the connecting rod 6 from coming out of the first connection hole 310B, so as to be able to limit the bracket 4B from rotating relative to the gear ring 31B.

[0041] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0042] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and controls can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An electric valve, characterized in that, Comprising: A driving component, a gear ring and a bracket. The driving component includes a rotating shaft. The gear ring and the bracket are at least partially located in the valve cavity of the electric valve. The gear ring supports the bracket. The bracket has a through hole, and the rotating shaft passes through the through hole. One of the bracket and the gear ring includes a concave portion, and the other of the bracket and the gear ring includes a convex portion. The convex portion is at least partially located in the concave portion. In the circumferential direction of the bracket, the convex portion can abut against the wall of the concave portion to limit the rotation of the bracket relative to the gear ring.

2. The electric valve according to claim 1, wherein It further includes a housing component. The housing component includes a sleeve. The rotating shaft is at least partially located in the sleeve. The bracket includes a top portion and a base portion. The top portion has the through hole. The base portion is at least partially located in the sleeve. The outer peripheral wall of the base portion is in clearance fit with the inner peripheral wall of the sleeve.

3. The electric valve according to claim 2, characterized in that, The gear ring includes a protruding portion protruding upward along the axial direction of the rotating shaft. The outer peripheral wall of the protruding portion is in clearance fit with the inner peripheral wall of the sleeve. The protruding portion has a first notch, or the number of protruding portions is at least two, and there is a first notch between adjacent protruding portions. The first notch serves as the concave portion. The bracket further includes a downward extending portion protruding downward along the axial direction of the rotating shaft from the base portion. The downward extending portion is at least partially located in the first notch, and the downward extending portion serves as the convex portion.

4. The electric valve according to claim 3, characterized in that The gear ring further includes a partition portion. The partition portion is plate-shaped. The partition portion supports the bracket. The protruding portion protrudes upward from the partition portion. The partition portion includes a recessed portion. The recessed portion communicates with the first notch. The base portion is cylindrical. The bracket further includes a side extending portion extending radially outward from the downward extending portion along the base portion. The side extending portion is at least partially located in the recessed portion, and the side extending portion can abut against the side wall of the recessed portion.

5. The electric valve according to any one of claims 1-4, characterized in that, The gear ring includes a partition portion and a protruding portion protruding upward from the partition portion. The partition portion is plate-shaped. The partition portion supports the bracket. The partition portion has a central hole. The partition portion includes a recessed portion. The bracket includes a base portion. The base portion is cylindrical. In the radial direction of the base portion, the central hole is located inside the protruding portion. The recessed portion extends radially along the base portion to the central hole.

6. The electric valve according to claim 5, characterized in that It further includes a transmission member and a planetary gear mechanism. The rotating shaft is rotationally connected to the transmission member. The transmission member includes a large-diameter portion and a small-diameter portion. In the radial direction of the base portion, the large-diameter portion is located inside the protruding portion. The large-diameter portion includes an annular portion protruding toward the partition portion. The annular portion contacts the upper surface of the partition portion. The small-diameter portion passes through the central hole. The small-diameter portion includes a sun gear portion. The planetary gear mechanism includes a planetary gear. The sun gear portion meshes with the planetary gear.

7. The electric valve according to claim 4, characterized in that, The side extending portion is located below the sleeve. Along the longitudinal direction of the electric valve, define the distance between the upper surface of the side extending portion and the lower end surface of the sleeve as h1, and define the distance between the bottom wall of the recessed portion and the upper end surface of the protruding portion as h2. Then it satisfies: h1 < h2.

8. The electric valve according to claim 2, characterized in that, The ring gear includes a partition portion, a convex portion and the protruding portion. The partition portion is plate-shaped. The convex portion and the protruding portion protrude upward along the axial direction of the rotating shaft from the partition portion. In the radial direction of the base portion, the protruding portion is located outside the convex portion. The inner peripheral wall of the base portion is in clearance fit with the outer peripheral wall of the convex portion. The base portion has the concave portion, and the opening of the concave portion faces the partition portion.

9. The electric valve according to claim 8, wherein, The bracket further includes a laterally extending portion which extends radially outward from the base portion. The laterally extending portion is located below the sleeve. The laterally extending portion has a second notch which is in communication with the concave portion. A part of the protruding portion is located in the concave portion, and another part of the protruding portion is located in the second notch.

10. The electric valve according to any one of claims 2-4, 7-9, characterized in that, The driving component further includes a rotor which is located inside the sleeve. The bracket is made of plastic. The bracket includes a top portion and a base portion. The outer diameter of the top portion is smaller than the inner diameter of the rotor. The top portion is at least partially located inside the rotor, and the base portion is located below the rotor.

11. An electric valve, characterized in that, Comprising: A driving component, a ring gear, a bracket and a connecting rod. The driving component includes a rotating shaft. The ring gear and the bracket are located in the valve cavity of the electric valve. The ring gear supports the bracket. The bracket has a through hole, and the rotating shaft passes through the through hole. The ring gear has a first connection hole, and the bracket has a second connection hole. A part of the connecting rod is located in the first connection hole, and another part of the connecting rod is located in the second connection hole.

12. The electric valve according to claim 11, characterized in that, It further includes a sleeve. At least a part of the rotating shaft is located inside the sleeve. The bracket includes a top portion, a base portion and a laterally extending portion. The top portion has the through hole. The base portion is partially located inside the sleeve. The outer peripheral wall of the base portion is in clearance fit with the inner peripheral wall of the sleeve. The laterally extending portion extends radially outward from the base portion. The laterally extending portion has the second connection hole. In the longitudinal direction of the electric valve, the connecting rod is located below the sleeve. The connecting rod passes through the second connection hole. The first connection hole includes a hole bottom which can support the connecting rod.

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