Assembly and motor

Abstract

The application provides an assembly and a motor, the assembly comprising: a first component (10) and a second component (20), the first component (10) being provided with a groove structure (11), the groove structure (11) having different depths in an assembly direction, the second component (20) being provided with an assembly protrusion (21), the assembly protrusion (21) being matched with the different depths of the groove structure (11) to improve the precision of the assembly. The technical scheme of the application realizes the matching of the two components under different deviation levels, compresses the assembly deviation of the two components, and realizes high-precision assembly; and the groove structure is convenient to manufacture and has low cost, so that the assembly precision is improved under the condition of low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an assembly and an electric machine. BACKGROUND

[0002] Generally, the size deviation of the assembly after assembly is the accumulation of the processing deviation and the assembly deviation, so the more complex the assembly is, the greater the accumulated deviation is. Therefore, the size deviation of the electric machine assembly after assembly mainly depends on the processing deviation of the parts and the assembly deviation when the parts are assembled.

[0003] At present, the assembly precision can be improved by improving the processing and assembly precision of the parts, but the improvement of the precision will cause a sharp increase in cost, and there is a limit to the improvement of the processing and assembly precision. For the electric machine assembly, the large size deviation is a key factor affecting the performance of the electric machine and the related air duct, and it is difficult to improve the precision due to cost constraints. Therefore, there is an urgent need for an electric machine assembly that improves the assembly precision and has low cost. SUMMARY

[0004] The main purpose of the present application is to provide an assembly and an electric machine to solve the problem of sharp increase in cost caused by improving the assembly precision in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides an assembly, comprising: a first part and a second part, the first part is provided with a groove structure, the groove structure has different depths in the assembly direction, the second part is provided with an assembly protrusion, the assembly protrusion is matched with the different depths of the groove structure to improve the precision of the assembly.

[0006] Further, part of the first part is located in the second part, and the assembly protrusion is arranged on the inner wall of the second part.

[0007] Further, the groove structure is a stepped groove with a stepped bottom wall along the circumference of the first part.

[0008] Further, the number of steps of the stepped groove is greater than or equal to the result of the size tolerance of the height difference between the third part and the second part in the assembly direction divided by the size tolerance of the height difference required to be met by the first part and the second part in the assembly direction, and the result is rounded up, wherein the third part has a groove with the same depth and matches with the assembly protrusion.

[0009] Further, each step surface of the stepped groove is provided with a positioning groove, and the assembly protrusion is provided with a positioning protrusion matched with the positioning groove.

[0010] Further, the outer side of the groove structure extends to the outer circumferential surface of the first part.

[0011] Further, the groove structure is an assembly groove with a gradually decreasing groove depth along the circumference of the first part.

[0012] Furthermore, the groove depths at both ends of the assembly groove are the upper and lower limit deviations of the distance between the mating surface of the assembly protrusion and the end face of the second component in the assembly direction, respectively.

[0013] Furthermore, multiple groove structures and assembly protrusions are provided, with multiple groove structures spaced apart along the circumference of the first component and corresponding one-to-one with multiple assembly protrusions.

[0014] The present invention also provides an electric motor, including an assembly assembly, wherein the assembly assembly is the assembly assembly described above.

[0015] Furthermore, the first component is a diffuser, and the second component is a housing.

[0016] The technical solution of this invention has the following advantages: different depths of the assembly protrusion and groove structure are matched to achieve the matching of two parts under different deviation levels, thereby reducing the assembly deviation of the two parts and achieving high-precision assembly; and the above-mentioned groove structure is easy to process and manufacture, and has low cost, thereby improving the accuracy of the component while ensuring low cost. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A partial cross-sectional schematic diagram of the assembly assembly provided in a first embodiment of the present invention is shown;

[0019] Figure 2 It shows Figure 1 A three-dimensional schematic diagram of the first component of the assembly assembly;

[0020] Figure 3 It shows Figure 1 A partial perspective view of the second component of the assembly assembly;

[0021] Figure 4 A partial cross-sectional schematic diagram of the assembly assembly provided in a second embodiment of the present invention is shown;

[0022] Figure 5 It shows Figure 4 A three-dimensional schematic diagram of the first component of the assembly assembly;

[0023] Figure 6 It shows Figure 4A partial three-dimensional schematic diagram of the second component of the assembly assembly.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. First component; 11. Groove structure; 111. Positioning groove; 20. Second component; 21. Assembly protrusion; 211. Positioning protrusion. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] like Figures 1 to 3 As shown, the assembly assembly of this embodiment includes: a first component 10 and a second component 20. The first component 10 is provided with a groove structure 11, which has different depths in the assembly direction. The second component 20 is provided with an assembly protrusion 21, which cooperates with the different depths of the groove structure 11 to improve the accuracy of the assembly assembly.

[0032] The assembly component of the embodiment is used to match the assembly protrusion 21 with the groove structure 11 of different depths, so as to realize the matching of two components under different deviation levels, compress the assembly deviation of two components, and realize high-precision assembly. In addition, the groove structure 11 is convenient to manufacture and has low cost, so that the assembly precision is improved under the condition of low cost.

[0033] In the embodiment, the first component 10 is partially located in the second component 20, and the assembly protrusion 21 is arranged on the inner wall of the second component 20, so that the height difference of two components can be adjusted. Specifically, the first component 10 is a disc structure, the second component 20 is a cylindrical structure, and the groove structure 11 is arranged on the first surface of the first component 10.

[0034] In the embodiment, the groove structure 11 is a stepped groove with a bottom wall in a stepped shape along the circumference of the first component 10, that is, the stepped groove has a size change in the assembly direction. The structure of the stepped groove is simple, which is convenient for processing and reduces the processing cost. Specifically, the first component 10 rotates within a certain range relative to the second component 20 in a direction perpendicular to the assembly direction. During assembly, the assembly protrusion 21 matches different stepped surfaces of the stepped groove by rotating the first component 10, so that the deviation caused by the processing deviation of two components can be absorbed, and the size of the assembly in the assembly direction can meet the design requirements.

[0035] In the embodiment, the number of steps of the stepped groove depends on the cumulative tolerance of two components and the tolerance required by the assembly of two components into an assembly. Specifically, the number of steps of the stepped groove is greater than or equal to the result of the size tolerance of the height difference of the third component and the second component 20 in the assembly direction divided by the size tolerance of the height difference required by the first component 10 and the second component 20 in the assembly direction, and the result is rounded up. The value, wherein the third component has a groove of the same depth and matches the assembly protrusion 21.

[0036] The following will be described in combination with Figure 1 The determination process of the size of the stepped groove is illustrated as follows:

[0037] In order to facilitate the description, a third component (not shown in the figure) is added, and the difference between the third component and the first component is only whether the depth of the groove structure is the same, the first surface of the third component has grooves with the same depth, and the first surface of the first component 10 has stepped grooves. The fitting size of the third component is a, and the fitting size of the second component is b±0.39, wherein the fitting size of the third component refers to the distance between the groove bottom surface of the groove in the assembly direction and the second surface thereof, and the fitting size of the second component refers to the distance between the fitting surface of the assembly protrusion 21 in the assembly direction and the end surface of the second component 20. Then the height difference between the third component and the second component in the assembly direction is a-b, and the size tolerance of the height difference is caused by the second component and is 0.78. If the height difference required to be satisfied by the first component 10 and the second component 20 in the assembly direction is (a-b)±0.12 (the size tolerance is 0.24), the number of steps required to open the stepped groove is greater than or equal to the result of 0.78 / 0.24 rounded up to 4. Therefore, the stepped groove with not less than 4 steps is opened on the first component 10, which respectively matches the different tolerance ranges of the fitting sizes on the second component. For example, 5 steps are opened, and the tolerance range of the size b matched by each step is 0.78 / 5, that is, the tolerance range of the size b is 0.156, and specifically: b(-0.234, -0.39); b(-0.078, -0.234); b±0.078; b(0.234, 0.078); b(0.39, 0.234). Then the size of a of the first component matching the above size section is designed, and when matching the size section of b(-0.234, -0.39), in order to satisfy the size requirement of the height difference (a-b)±0.12 after fitting, the fitting size of the first component should be designed as a(-0.27, -0.354), and the other steps are designed in turn. It should be noted that the number of steps is mainly considered the machining tolerance that can be reached by the first component, and when the machining tolerance is low, more steps need to be opened.

[0038] In the embodiment, the positioning groove 111 is arranged on each step surface of the stepped groove, and the positioning protrusion 211 matched with the positioning groove 111 is arranged on the assembly protrusion 21. The positioning groove 111 and the positioning protrusion 211 match to play a positioning role, so that the two components will not introduce assembly deviation due to relative rotation after installation is completed, and the components can also avoid the circumferential direction movement after assembly.

[0039] In the embodiment, the groove structure 11 and the assembly protrusion 21 are both provided with a plurality of structures, the plurality of groove structures 11 are arranged in the circumferential direction of the first component 10 and correspond to the plurality of assembly protrusions 21, so that the height difference between the first component and the second component in the circumferential direction is the same, and high-precision assembly is further realized.

[0040] In the embodiment, the outer side of the stepped groove extends to the outer circumferential surface of the first component 10, which can reduce the processing difficulty of the stepped groove and further reduce the processing cost.

[0041] In the embodiment, the first component is a part, and the second component is also a part. Of course, the first component and the second component can also be assemblies.

[0042] Embodiment two

[0043] Figures 4 to 6 The structure of the assembly of embodiment two is shown, and the assembly of embodiment two is different from that of embodiment one in that the structure of the groove structure 11 is different. In embodiment two, the groove structure 11 is an assembly groove with a groove depth gradually decreasing along the circumference of the first component 10, that is, the bottom surface of the assembly groove is a slope or a curved surface. The machining precision of the slope or the curved surface is required to be higher. When the machining precision is higher, the length of the assembly groove can be processed to be shorter.

[0044] In the embodiment, the groove depths of the two ends of the assembly groove are the upper limit deviation and the lower limit deviation between the mating surface of the assembly protrusion 21 in the assembly direction and the end surface of the second component 20, for example, when the mating size of the second component is b±0.39, the groove depth c of one end of the assembly groove is b-0.39, and the groove depth d of the other end of the assembly groove is b+0.39.

[0045] In the embodiment, a circumferential limiting structure is further arranged between the first component and the second component, which can avoid the movement of the components in the circumferential direction after assembly.

[0046] As an alternative embodiment, the groove structure is a plurality of assembly grooves arranged at intervals, and the depths of the assembly grooves are different. Specifically, the depths of the plurality of assembly grooves gradually decrease along the circumference of the first component.

[0047] As an alternative embodiment, the first surface of the first component is provided with an assembly protrusion, the inner wall of the second component is provided with a support platform, and the support platform is provided with a groove structure with different depths.

[0048] The application also provides an electric machine comprising the assembly, and the assembly is the assembly described above. The size deviation of the electric machine is compressed, so that the assembly size deviation of the assembly of the electric machine is smaller than the material processing deviation. The corresponding size of the assembly can be adjusted to a higher precision, high-precision assembly is achieved, and the processing and assembly costs are basically not increased. This is beneficial to realize high efficiency and low noise of the electric machine, and solves the technical defects that high-precision components require high-precision parts and high assembly level.

[0049] In the embodiment, the first component 10 is a diffuser, and the second component 20 is a shell.

[0050] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0051] The assembly component is assembled by two parts, the first part and the second part are respectively provided with groove structure and protrusion structure in the assembly direction, the two parts are matched by the groove structure and the protrusion structure, the matched parts can be assembled to different matching depths in the assembly direction by designing groove structures with different depths, the height difference between the two parts is adjusted, the cumulative deviation caused by the part machining deviation is adjusted, and the component deviation range is less than or equal to the deviation range of the part.

[0052] Obviously, the above-mentioned embodiments are only examples for clearly illustrating, but not limit the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An assembly of components characterised in that, The assembly comprises: a first component (10) and a second component (20), the first component (10) is provided with a groove structure (11), the groove structure (11) has different depths in the assembly direction, the second component (20) is provided with an assembly protrusion (21), the assembly protrusion (21) cooperates with the different depths of the groove structure (11) to improve the precision of the assembly; the groove structure (11) is a stepped groove with a stepped bottom wall along the circumference of the first component (10); the first component (10) is a diffuser, and the second component (20) is a housing; alternatively, the groove structure (11) is an assembly groove with a gradually decreasing groove depth along the circumference of the first component (10); the groove depths at both ends of the assembly groove are respectively an upper limit deviation and a lower limit deviation of the distance between the mating surface of the assembly protrusion (21) and the end face of the second component (20) in the assembly direction.

2. The assembly of claim 1, wherein, part of the first component (10) is located in the second component (20), and the assembly protrusion (21) is arranged on the inner wall of the second component (20).

3. The assembly of claim 1, wherein, each stepped surface of the stepped groove is provided with a positioning groove (111), and the assembly protrusion (21) is provided with a positioning protrusion (211) cooperating with the positioning groove (111).

4. The assembly of claim 2, wherein, the outside of the groove structure (11) extends to the outer circumferential surface of the first component (10).

5. The assembly of any one of claims 1 to 4, wherein, the groove structure (11) and the assembly protrusion (21) are both provided with a plurality of groove structures (11) and assembly protrusions (21), the plurality of groove structures (11) are arranged in intervals along the circumference of the first component (10) and correspond to the plurality of assembly protrusions (21) one by one.

6. An electric machine comprising an assembly of components, characterized in that, the assembly is the assembly of any one of claims 1 to 5.

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