Retarder and its multi-port valve

Abstract

The utility model relates to control valve field especially, it is a kind of reducer and its multi-way valve. Reducer includes box and installs the first cover plate, second cover plate, connecting shaft and deceleration component of box, deceleration component is set between the first cover plate and second cover plate, first cover plate is opened with first connecting hole and positioning hole, first connecting hole is opened in the axis position of first cover plate, one end of connecting shaft is connected with first connecting hole, the other end is connected with second cover plate, positioning hole is multiple and is opened around the axis of first cover plate, and for fixing deceleration component;Wherein, second cover plate includes body and connecting seat, body and first cover plate structure are same and opened with second connecting hole, connecting seat is connected in second connecting hole, the end of connecting shaft away from first cover plate is connected with connecting seat. Its advantage lies in, the body in second cover plate directly uses first cover plate, so the concentricity of positioning hole on first cover plate and body is higher, and assembly accuracy is also higher.

Description

Technical Field

[0001] This utility model relates to the field of control valves, and in particular to a speed reducer and its multi-way valve. Background Technology

[0002] Multi-way valves typically include a drive unit and a reducer. The reducer increases the torque of the drive unit, enabling the valve core to overcome load torque and friction torque, thus ensuring the switching effect of the valve core.

[0003] A speed reducer typically includes a first cover plate and a second cover plate. Each cover plate has multiple sets of corresponding positioning holes to secure the planetary gears and prevent them from wobbling. Therefore, the positioning holes on the first and second cover plates must be accurately aligned; otherwise, the planetary gears installed in the upper and lower positioning holes will shift, leading to incorrect gear engagement, wear, and even jamming. However, in actual machining, the structures of the first and second cover plates differ, requiring separate machining. Due to tool runout during each tool change on the lathe, and the influence of machining accuracy, the pass rate cannot be 100%. It is difficult to guarantee that the positioning holes on each upper and lower cover plate correspond perfectly, thus increasing assembly difficulty and affecting the stability of the speed reducer. Utility Model Content

[0004] In view of the above-mentioned technical problems, this utility model provides a speed reducer.

[0005] A speed reducer includes: a housing; a first cover plate, a second cover plate, a connecting shaft, and a speed reduction assembly, all installed in the housing. The speed reduction assembly is disposed between the first cover plate and the second cover plate. The first cover plate has a first connecting hole and a plurality of positioning holes. The first connecting hole is located at the axial position of the first cover plate. One end of the connecting shaft passes through the first connecting hole, and the other end is rotatably connected to the second cover plate. The positioning holes are located around the axial position of the first cover plate and are used to fix the speed reduction assembly. The second cover plate includes a body and a connecting seat. The body has a second connecting hole and a plurality of positioning holes. The body has the same structure as the first cover plate. The connecting seat is connected to the second connecting hole. The end of the connecting shaft away from the first cover plate is rotatably connected to the connecting seat.

[0006] With this configuration, the first cover plate and the second cover plate are used to fix the deceleration assembly and limit the deceleration assembly to a preset position. The connecting shaft connects the first cover plate and the second cover plate. The first cover plate has a first connecting hole for connecting with the connecting shaft. To address the issue that the size requirements of the first connecting hole on the first cover plate and the second connecting hole on the main body are inconsistent, a connecting seat is provided in the second connecting hole to allow the second cover plate to be stably connected to the connecting shaft.

[0007] In one embodiment, the connector includes a connecting portion and a protrusion, the connecting portion being fixedly connected to the protrusion, at least a portion of the connecting portion being inserted into the second connecting hole, and the protrusion extending out of the second connecting hole on the side away from the first cover plate.

[0008] In one embodiment, the reducer further includes an output gear located within the housing and meshing with the reduction assembly, the output gear having an abutting side facing the second cover plate, the protrusion abutting against the abutting side.

[0009] In one embodiment, the protrusion has an abutting surface that abuts against the abutting side, the roughness of the abutting surface being less than the surface roughness of the first cover plate.

[0010] In one embodiment, the first cover plate is configured as a disc structure, and the first connecting hole and the second connecting hole are configured as circular holes.

[0011] In one embodiment, the outer diameter of the protrusion is larger than the outer diameter of the connecting portion, and a stepped surface is formed between the protrusion and the connecting portion, the stepped surface abutting against the side of the second cover plate away from the first cover plate.

[0012] In one embodiment, the connector has a connecting hole, and the end of the connecting shaft has a positioning section. The diameter of the positioning section is smaller than the diameter of other parts of the connecting shaft. The positioning section is inserted into the connecting hole and rotatably connected to the connecting hole.

[0013] In one embodiment, the reduction assembly includes at least three planetary gears, each of which is threaded through a rotating shaft. The two ends of each rotating shaft are rotatably connected to a first connecting hole and a second connecting hole, respectively. A sun gear is provided on the outer periphery of the connecting shaft, and each planetary gear meshes with the sun gear.

[0014] In one embodiment, the reducer further includes a fixed gear and an output gear, the fixed gear and the output gear being spaced apart along the axial direction of the connecting shaft, the inner sides of the fixed gear and the output gear meshing with the planetary gear, the fixed gear being fixedly connected to the housing, and the output gear being rotatably disposed in the housing, with the side of the output gear facing away from the reduction assembly forming an output end.

[0015] In one embodiment, the first cover plate and the body each have three positioning holes, which are evenly distributed in a ring along the central axis of the first cover plate or the body.

[0016] In one embodiment, the connector is interference-fitted with the second connector hole.

[0017] This utility model also provides a multi-way valve, including the speed reducer described above.

[0018] Compared to existing technologies, this invention improves the structure of the second cover plate by making it a separate unit, with the main body directly using the first cover plate. This results in higher concentricity of the positioning holes on the first cover plate and the main body, and higher assembly precision. This avoids misalignment of the rotating shaft and planetary gear assembled in the positioning holes, thus ensuring the stability of the reducer operation. Furthermore, a connecting seat is installed in the second connecting hole of the main body to compensate for the problem of the second connecting hole being too large. The connecting seat can also abut against the output gear to reduce friction and torque loss. Attached Figure Description

[0019] Figure 1 A cross-sectional view of one embodiment of the speed reducer provided by this utility model;

[0020] Figure 2 A partial structural schematic diagram of the speed reducer provided by this utility model;

[0021] Figure 3 A schematic diagram of one embodiment of the first cover plate, the second cover plate, and the connecting shaft provided by this utility model;

[0022] Figure 4 A schematic diagram of the structure of one embodiment of the first cover plate, the second cover plate, and the connecting shaft provided by this utility model from another angle;

[0023] Figure 5 This is a schematic diagram of one embodiment of the connector provided by this utility model.

[0024] The symbols in the diagram represent the following meanings:

[0025] 100. Reducer; 10. Housing; 20. First cover plate; 21. First connecting hole; 22. Positioning hole; 30. Second cover plate; 31. Body; 311. Second connecting hole; 32. Connecting seat; 321. Connecting part; 322. Protrusion; 323. Connecting hole; 40. Connecting shaft; 50. Reducer assembly; 51. Sun gear; 52. Planetary gear; 521. Rotating shaft; 60. Output gear; 61. Valve core; 200. Multi-way valve. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it can be directly on the other mechanism or there may be an intervening mechanism. When a mechanism is considered to be "connected to" another mechanism, it can be directly connected to the other mechanism or there may be an intervening mechanism. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figures 1-5This utility model provides a speed reducer 100, in which the body 31 structure in the first cover plate 20 and the second cover plate 30 is the same. Therefore, the second cover plate 30 can use the first cover plate 20, so that the positioning holes 22 on the first cover plate 20 and the second cover plate 30 correspond accurately, preventing the structure in the speed reduction assembly 50 from shifting.

[0032] The reducer 100 includes a housing 10, a first cover plate 20, a second cover plate 30, a connecting shaft 40, and a reduction assembly 50. The first cover plate 20, the second cover plate 30, the connecting shaft 40, and the reduction assembly 50 are all installed in the housing 10. The reduction assembly 50 is disposed between the first cover plate 20 and the second cover plate 30. The first cover plate 20 has a first connecting hole 21 and a positioning hole 22. The first connecting hole 21 is located on the axis of the first cover plate 20. One end of the connecting shaft 40 is connected to the first connecting hole 21, and the other end is connected to the second cover plate 30. There are multiple positioning holes 22, which are opened around the axis of the first cover plate 20 and are used to fix the reduction assembly 50. The second cover plate 30 includes a body 31 and a connecting seat 32. The body 31 has the same structure as the first cover plate 20 and has a second connecting hole 311. The connecting seat 32 is connected to the second connecting hole 311. The end of the connecting shaft 40 away from the first cover plate 20 is connected to the connecting seat 32.

[0033] Thus, the first cover plate 20 and the second cover plate 30 are used to fix the deceleration assembly 50 and limit the deceleration assembly 50 to a preset position. The connecting shaft 40 connects the first cover plate 20 and the second cover plate 30. The first cover plate 20 is provided with a first connecting hole 21 for connecting with the connecting shaft 40. In view of the problem that the size requirements of the first connecting hole 21 on the first cover plate 20 and the second connecting hole 311 on the body 31 are inconsistent, a connecting seat 32 is provided in the second connecting hole 311, and the second cover plate 30 is stably connected to the connecting shaft 40 through the connecting seat 32.

[0034] Therefore, the second cover plate 30 is actually composed of the first cover plate 20 (i.e., the body 31) and the connecting seat 32. Typically, the first connecting hole 21 is made relatively large to ensure a more stable connection between the portion of the connecting shaft 40 located in the first connecting hole 21 and the external drive assembly. The second connecting hole 311 can generally be made relatively small. However, in this embodiment, for the sake of consistent machining of the positioning holes 22, the body 31 and the first cover plate 20 use the same component. Therefore, the connecting seat 32 is installed in the second connecting hole 311, allowing the second cover plate 30 to meet the connection requirements of the connecting shaft 40.

[0035] Specifically, the connector 32 includes a connecting portion 321 and a protrusion 322. The connecting portion 321 is connected to the protrusion 322. At least a portion of the connecting portion 321 is located within the second connecting hole 311, and the outer peripheral wall of the connecting portion 321 is connected to the inner wall of the second connecting hole 311. The protrusion 322 extends out of the second connecting hole 311 on the side away from the first cover plate 20. In this way, the connecting portion 321 is used to achieve a fixed connection with the second connecting hole 311, while the protrusion 322 can be used to form an abutment with external components, making the structure more compact while reducing the contact area and lowering the frictional resistance.

[0036] The outer diameter of the protrusion 322 is larger than the outer diameter of the connecting portion 321, forming a stepped surface between the protrusion 322 and the connecting portion 321. The stepped surface abuts against the side of the second cover plate 30 away from the first cover plate 20. This ensures that the side of the second cover plate 30 away from the first cover plate 20 is stably suspended, avoiding friction.

[0037] The connecting seat 32 has a connecting hole 323, and the end of the connecting shaft 40 has a positioning section. The diameter of the positioning section is smaller than the diameter of the other parts of the connecting shaft 40. The positioning section is inserted into the connecting hole 323 and rotatably connected to the connecting hole 323. In this way, the connecting shaft 40 and the connecting seat 32 are positioned and connected.

[0038] Furthermore, in this embodiment, the reducer 100 also includes an output gear 60, which is located inside the housing 10 and meshes with the reduction assembly 50. The output gear 60 has an abutting side facing the second cover plate 30, and a protrusion 322 abuts against the abutting side. In this way, the protrusion 322 abuts against the output gear 60, providing axial support for each internal structure, and reducing friction between the output gear 60 and the reduction assembly 50 during rotation, thus reducing wear.

[0039] Furthermore, the protrusion 322 has an abutting surface that abuts against the abutting side, and the roughness of the abutting surface is less than the surface roughness of the first cover plate 20. This further reduces friction and wear.

[0040] When parts are mass-produced, the first cover plate 20 and the second cover plate 30 are generally made by powder metallurgy. Therefore, the roughness of the second cover plate 30 is difficult to guarantee. In actual use, the second cover plate 30 will rub against the output gear 60. By adopting a split design, the surface roughness of the connecting seat 32 can be reduced by lathe, thus reducing the friction between the connecting seat 32, i.e. the second cover plate 30 and the output gear 60, and reducing torque loss.

[0041] Since the connecting seat 32, the first cover plate 20, and the body 31 are separate and processed separately, the friction processing steps on the surface of the connecting seat 32 will not affect the processing of the first cover plate 20 and the body 31.

[0042] Preferably, the connecting seat 32 and the second connecting hole 311 are interference-fitted, which can ensure the connection strength of the connecting seat 32 and the second connecting hole 311, thereby ensuring concentricity.

[0043] To improve the connection strength, the connector 32 and the body 31 are connected together by welding.

[0044] Specifically, the first cover plate 20 is configured as a disc structure, and the first connecting hole 21 and the second connecting hole 311 are circular holes. This ensures that the coaxially arranged structures will not interfere with each other when rotating, and facilitates processing. Preferably, in this embodiment, the first cover plate 20, the first connecting hole 21, the connecting shaft 40, the second connecting hole 311, and the connecting seat 32 are all coaxially arranged.

[0045] The reduction assembly 50 includes at least three planetary gears 52, each of which is fitted with a rotating shaft 521. The two ends of each rotating shaft 521 are rotatably connected to a first connecting hole 21 and a second connecting hole 311, respectively. A sun gear 51 is located on the outer periphery of the connecting shaft 40, and each planetary gear 52 meshes with the sun gear 51. Thus, the connecting shaft 40 is connected to an external drive assembly, causing the connecting shaft 40 to rotate. When the connecting shaft 40, i.e., the sun gear 51, rotates, it meshes with the planetary gears 52, driving the planetary gears 52 to rotate, which in turn drive the output gear 60 to rotate. The inner side of the output gear 60 meshes with the planetary gears 52, and a valve core 61 is connected to the side of the output gear 60 facing away from the reduction assembly 50. Therefore, when the output gear 60 rotates, its power is output to the valve core 61, driving the valve core 61 to rotate.

[0046] To ensure a more rational arrangement of the three planetary gears 52, a first line connects the center of the positioning hole 22 on the first cover plate 20 to the axis of the first cover plate 20, with an included angle of 120° between adjacent first lines; similarly, a second line connects the center of the positioning hole 22 on the second cover plate 30 to the axis of the second cover plate 30, with an included angle of 120° between adjacent second lines. This allows the three planetary gears 52 to be evenly distributed and their stress distribution to be more balanced.

[0047] Understandably, in other embodiments, if the number of planetary gears 52 increases synchronously, for example to four, the included angle between adjacent first connecting lines can also be adjusted to 90°.

[0048] This utility model also provides a multi-way valve 200, including the reducer 100 as described above. Figure 1 Only a portion of the multi-way valve 200 is shown in the image.

[0049] Compared with the prior art, this utility model improves the structure of the second cover plate 30, making the second cover plate 30 a separate unit. The main body 31 directly adopts the first cover plate 20. Therefore, the concentricity of the positioning holes 22 on the first cover plate 20 and the main body 31 is higher, and the assembly accuracy is also higher. This avoids the misalignment of the rotating shaft 521 and planetary gear 52 assembled in the positioning holes 22, thereby ensuring the stability of the reducer 100. In addition, a connecting seat 32 is installed in the second connecting hole 311 of the main body 31 to compensate for the problem that the second connecting hole 311 is too large. The connecting seat 32 can also abut against the output gear 60 to reduce friction and reduce torque loss.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A speed reducer, characterized in that, include: Box (10); The first cover plate (20), the second cover plate (30), the connecting shaft (40), and the deceleration assembly (50) are all installed in the housing (10). The deceleration assembly (50) is disposed between the first cover plate (20) and the second cover plate (30). The first cover plate (20) has a first connecting hole (21) and a plurality of positioning holes (22). The first connecting hole (21) is located on the axis of the first cover plate (20). One end of the connecting shaft (40) passes through the first connecting hole (21), and the other end is rotatably connected to the second cover plate (30). The positioning holes (22) are opened around the axis of the first cover plate (20) and are used to fix the deceleration assembly (50). The second cover plate (30) includes a body (31) and a connecting seat (32). The body (31) has a second connecting hole (311) and a plurality of positioning holes (22). The body (31) has the same structure as the first cover plate (20). The connecting seat (32) is connected to the second connecting hole (311). The end of the connecting shaft (40) away from the first cover plate (20) is rotatably connected to the connecting seat (32).

2. The reducer according to claim 1, characterized in that, The connecting seat (32) includes a connecting part (321) and a protrusion (322). The connecting part (321) is fixedly connected to the protrusion (322). At least a portion of the connecting part (321) is inserted into the second connecting hole (311). The protrusion (322) extends out of the second connecting hole (311) on the side away from the first cover plate (20).

3. The reducer according to claim 2, characterized in that, The reducer also includes an output gear (60) located inside the housing (10) and meshing with the reduction assembly (50). The output gear (60) has an abutting side facing the second cover plate (30), and the protrusion (322) abuts against the abutting side.

4. The reducer according to claim 3, characterized in that, The protrusion (322) has an abutting surface that abuts against the abutting side, and the roughness of the abutting surface is less than the surface roughness of the first cover plate (20).

5. The reducer according to claim 2, characterized in that, The first cover plate (20) is configured as a disc structure, and the first connecting hole (21) and the second connecting hole (311) are configured as round holes.

6. The reducer according to claim 2, characterized in that, The outer diameter of the protrusion (322) is larger than the outer diameter of the connecting part (321), and a stepped surface is formed between the protrusion (322) and the connecting part (321). The stepped surface abuts against the side of the second cover plate (30) away from the first cover plate (20).

7. The reducer according to claim 1, characterized in that, The connecting seat (32) is provided with a connecting hole (323), and the end of the connecting shaft (40) is provided with a positioning section. The diameter of the positioning section is smaller than the diameter of other parts of the connecting shaft (40). The positioning section is inserted into the connecting hole (323) and rotates to connect with the connecting hole (323).

8. The reducer according to claim 1, characterized in that, The deceleration assembly (50) includes at least three planetary gears (52), each of which is provided with a rotating shaft (521). Both ends of each rotating shaft (521) are rotatably connected to a positioning hole (22). A sun gear (51) is provided on the outer periphery of the connecting shaft (40), and each of the planetary gears (52) meshes with the sun gear (51).

9. The reducer according to claim 8, characterized in that, The reducer also includes a fixed gear and an output gear (60). The fixed gear and the output gear (60) are spaced apart along the axial direction of the connecting shaft. The inner sides of the fixed gear and the output gear (60) mesh with the planetary gear (52). The fixed gear is fixedly connected to the housing. The output gear is rotatably disposed in the housing. The output gear (60) forms an output end on the side facing away from the reducer assembly (50).

10. The reducer according to claim 1, characterized in that, The first cover plate (20) and the body (31) each have three positioning holes, which are evenly distributed in a ring along the central axis of the first cover plate (20) or the body (31).

11. The reducer according to claim 1, characterized in that, The connecting seat (32) is interference-fitted with the second connecting hole (311).

12. A multi-way valve, characterized in that, Includes the speed reducer as described in any one of claims 1-11.

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