Split type hollow shaft and motor
By splitting the motor mandrel into multiple segments and setting cavities in each segment, the problems of high machining difficulty and heavy weight of existing motor mandrels are solved, achieving efficient machining and lightweight design.
Patent Information
- Application Number
- CN202422823265.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-19
AI Technical Summary
The existing motor spindles are difficult to manufacture and are quite heavy, resulting in high production costs.
The design adopts a split hollow shaft, which divides the main body of the mandrel into multiple shaft segments and sets multiple cavities in each shaft segment. The segments are connected by laser welding and interference fit, which improves processing efficiency and reduces weight.
It improves processing efficiency and machine tool utilization, reduces manufacturing difficulty and cost, and also reduces the weight of the mandrel.
Smart Images
Figure CN223652069U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of motor shaft structure, and in particular to a split type hollow shaft and motor. BACKGROUND
[0002] The motor shaft is a key component in the motor, and serves as a bridge for energy conversion between the motor and the automobile equipment.
[0003] At present, most of the motor shafts adopt an integrated design, which not only increases the processing difficulty, but also leads to a large weight of the shaft, and it is difficult to efficiently process the shaft by using a machine tool, thereby increasing the production cost. CONTENT OF THE UTILITY MODEL
[0004] Therefore, the present application aims to provide a split type hollow shaft and motor, so as to solve the problems of large processing difficulty, large weight and high cost of the existing motor shaft.
[0005] According to the first aspect of the present application, a split type hollow shaft is provided, wherein the split type hollow shaft comprises a shaft body and a plurality of cavities.
[0006] Preferably, the plurality of shaft segments comprises a first shaft segment, a second shaft segment and a third shaft segment.
[0007] Preferably, an end portion of the first shaft segment is formed with a boss portion in the radial direction, and a first end of the second shaft segment is laser welded with the boss portion.
[0008] Preferably, an inner portion of a second end of the second shaft segment is formed with an annular mounting groove, the third shaft segment is inserted and mounted in the mounting groove, and the second end of the second shaft segment is interference press-fitted with the third shaft segment.
[0009] Preferably, the plurality of cavities comprises a first cavity, the first cavity is arranged in the first shaft segment, and the first cavity is formed in a tapered shape at a position corresponding to the boss portion.
[0010] Preferably, the plurality of cavities further comprises a second cavity, the second cavity is formed in a cylindrical shape, the second cavity is arranged in the inner portion of the second shaft segment, and the second cavity is communicated with the first cavity.
[0011] Preferably, the multi-section cavity further comprises a third cavity arranged inside the third shaft section, the third cavity being communicated with the second cavity, the third cavity comprising a plurality of cylindrical cavity sections with different diameters arranged along the axial direction, and the third cavity being communicated with the second end of the mandrel body.
[0012] Preferably, the first shaft section is provided with a first oil outlet hole communicated with the first cavity in the radial direction, the second shaft section is provided with a second oil outlet hole communicated with the second cavity in the radial direction, and the third shaft section is provided with a third oil outlet hole communicated with the third cavity in the radial direction.
[0013] Preferably, the wall thickness of the mandrel body at the position where the multi-section cavity is arranged is 5-7mm.
[0014] According to the second aspect of the present application, a motor is provided, wherein the motor comprises the split hollow shaft as described above.
[0015] The split hollow shaft and the motor according to the embodiments of the present application have the mandrel body comprising a plurality of shaft sections connected in sequence along the axial direction, and a plurality of cavity sections arranged inside the plurality of shaft sections along the axial direction of the mandrel body. In this way, by splitting the mandrel body, the processing efficiency and the utilization rate of the machine tool are improved, the manufacturing difficulty and cost are reduced, and the interior of the mandrel body is easily made into a cavity, thereby reducing the weight of the mandrel body. In this way, the problems of the existing motor mandrel, such as large processing difficulty, large weight and high cost, can be effectively solved.
[0016] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0018] Figure 1 is a schematic view of the split hollow shaft according to the present application.
[0019] Reference signs: 1-first shaft section; 10-first cavity; 11-first oil outlet hole; 101- boss part; 2-second shaft section; 20-second cavity; 21-second oil outlet hole; 201- mounting groove; 3-third shaft section; 30-third cavity; 31-third oil outlet hole; 100-mandrel body. DETAILED DESCRIPTION
[0020] The following detailed description is presented to aid in understanding the method, apparatus and / or system described herein. It is not intended to limit the method, apparatus and / or system described herein to the details described. Rather, it is intended to cover any modifications, variations, and equivalents that are within the scope of the present disclosure, as encompassed by the disclosure. For instance, the sequence of operations described herein is merely illustrative, and the operations can be carried out in a different order than described without departing from the scope of examples. Further, features described herein can be omitted in order to improve clarity and conciseness of the description.
[0021] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples have been provided so that this disclosure will be thorough and complete, and will fully convey the scope of the methods, apparatus and / or systems to those skilled in the art. Further, the examples described herein are to be considered in a sense relative to the implementations of the methods, apparatus and / or systems described herein.
[0022] Throughout the specification, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, "on top of" another element, or "covering" another element, it can be directly on, connected to, coupled to, adjacent to, on top of, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on", "directly connected to", "directly coupled to", "directly adjacent to", "directly on top of", or "directly covering" another element, there are no other elements interposed therebetween.
[0023] As used herein, the term "and / or" includes any one of the listed items and any combination of two or more of the listed items.
[0024] Although terms such as "first", "second", and "third" can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section. Thus, a component, assembly, region, layer or section referred to as a first component, assembly, region, layer or section in an example described herein can also be referred to as a second component, assembly, region, layer or section in another example without departing from the teachings of examples.
[0025] For ease of description, spatially relative terms, such as "above", "upper", "below", and "lower" can be used herein for the purpose of illustrating one element's relationship to another element in the drawings. Such spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientations depicted in the drawings. For example, if the device in the drawings is turned over, elements described as being "above" or "upper" other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein interpreted accordingly.
[0026] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of examples. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has", "having" as used herein, are specifically intended to be construed as open-ended terms (i.e., the terms do not exclude the presence of other elements).
[0027] Variations in shapes that are shown in the drawings can occur as a result of manufacturing processes and / or tolerances. Thus, the examples described herein are not limited to the precise shapes shown in the drawings, but include variations in shapes that occur as a result of manufacturing processes.
[0028] Features of the examples described herein can be combined with one another as would be apparent to one of ordinary skill in the art after understanding the disclosure provided herein. Furthermore, although examples described herein have a variety of configurations, other configurations are possible in which are apparent after understanding the disclosure provided herein.
[0029] As Figure 1 shown, according to a first aspect of the present application, there is provided a split hollow shaft, which comprises a mandrel body 100 and a plurality of hollow cavities.
[0030] In the following description, reference is made to the Figure 1 The specific structure of the above components of the split hollow shaft and the connection relationship of the above components are specifically described.
[0031] As Figure 1As shown, in this embodiment, the mandrel body 100 may include multiple shaft segments connected sequentially along the axial direction. Furthermore, multiple cavities may be provided within the multiple shaft segments along the axial direction of the mandrel body 100. Thus, by dividing the mandrel body 100 into multiple segments, processing efficiency and machine tool utilization are improved, while manufacturing difficulty is reduced. In addition, this arrangement facilitates the fabrication of multiple cavities within the mandrel body 100, thereby reducing the weight of the mandrel body 100.
[0032] Preferred, such as Figure 1 As shown, in this embodiment, the mandrel body 100 may include at least three shaft segments connected in sequence. Specifically, the mandrel body 100 may include a first shaft segment 1, a second shaft segment 2, and a third shaft segment 3. The first shaft segment 1 may be located at the first end of the mandrel body 100 (e.g., […]). Figure 1 (As shown on the left end). The second shaft segment 2 can be located in the middle of the mandrel body 100. The third shaft segment 3 can be located at the second end of the mandrel body 100 (as shown on the left end). Figure 1 (as shown on the right end). The second shaft segment 2 can be connected to the first shaft segment 1, and the third shaft segment 3 can be connected to the second shaft segment 2, thereby splitting the mandrel body 100 into three shaft segments.
[0033] Preferred, such as Figure 1 As shown, in this embodiment, a boss 101 may be formed radially at the end of the first shaft segment 1 near the second shaft segment 2. The boss 101 protrudes radially from the first shaft segment 1 and has a vertical end face on the side facing the second shaft segment 2. The first end of the second shaft segment 2 (which may be as follows) Figure 1 The left end shown can be laser welded to the end face of the boss portion 101, thereby fixing the first shaft segment 1 and the second shaft segment 2 together.
[0034] Further optimized, such as Figure 1 As shown, in this embodiment, the shape of the second shaft segment 2 can be approximately cylindrical. The second end of the second shaft segment 2 (which can be, for example,...) Figure 1 The inner part (i.e., the inner ring of the cylindrical section) of the right end shown can be formed with an annular mounting groove 201. The end of the third shaft segment 3 (can be as shown) Figure 1 The left end shown can be inserted into the mounting groove 201, thereby fixing the second shaft segment 2 and the third shaft segment 3 together. Specifically, the second end of the second shaft segment 2 can be press-fitted with the third shaft segment 3.
[0035] Preferred, such as Figure 1As shown in the embodiment, the multi-section cavity can comprise a first cavity 10. The first cavity 10 can be formed inside the first shaft section 1. The first cavity 10 can comprise a cylindrical cavity and a conical cavity extending along the axial direction, wherein the first cavity 10 can be formed as a conical cavity at the position corresponding to the boss part 101. Preferably, the first cavity 10 can not be connected to the first end of the mandrel body 100.
[0036] Preferably, as Figure 1 As shown in the embodiment, the multi-section cavity can further comprise a second cavity 20. The second cavity 20 can be arranged inside the second shaft section 2. Preferably, the second cavity 20 can be formed as a cylindrical cavity, and the second cavity 20 can be connected to both ends of the second shaft section 2 along the axial direction. After the split hollow shaft is installed and formed, the second cavity 20 can be connected to the first cavity 10.
[0037] Preferably, as Figure 1 As shown in the embodiment, the multi-section cavity can further comprise a third cavity 30. The third cavity 30 can be arranged inside the third shaft section 3, and the third cavity 30 can be connected to the second cavity 20 along the axial direction. The third cavity 30 can comprise a plurality of cylindrical cavity sections with different diameters arranged along the axial direction, and the diameters of the cylindrical cavity sections can be positively correlated with the diameters of the corresponding positions of the third shaft section 3, i.e., at the positions of the third shaft section 3 with larger diameters, the diameters of the cylindrical cavity sections inside are also larger. Conversely, at the positions of the third shaft section 3 with smaller diameters, the diameters of the cylindrical cavity sections inside are also smaller. In addition, preferably, the third cavity 30 can also be connected to the second end of the mandrel body 100 along the axial direction.
[0038] Further, preferably, as Figure 1 As shown in the embodiment, the wall thickness of the mandrel body 100 at the positions where the multi-section cavity is arranged can be 5-7 mm. In this way, the weight of the split hollow shaft can be greatly reduced while ensuring the strength of the mandrel body 100.
[0039] Preferably, as Figure 1As shown, in the embodiment, the split hollow shaft can further include a first oil outlet hole 11, a second oil outlet hole 21 and a third oil outlet hole 31. The first shaft section 1 can be provided with the first oil outlet hole 11 in the radial direction, and the first oil outlet hole 11 is communicated with the first cavity 10. The first oil outlet hole 11 can pass through the first shaft section 1 in the radial direction. The second shaft section 2 can be provided with the second oil outlet hole 21 in the radial direction, and the first oil outlet hole 11 is communicated with the second cavity 20. The second oil outlet hole 21 can pass through the second shaft section 2 in the radial direction. The third shaft section 3 is provided with the third oil outlet hole 31 in the radial direction, and the third oil outlet hole 31 is communicated with the third cavity 30. The third oil outlet hole 31 can pass through the third shaft section 3 in the radial direction. The first oil outlet hole 11, the second oil outlet hole 21 and the third oil outlet hole 31 are used for the circulation of cooling oil to cool the split hollow shaft.
[0040] In addition, according to the second aspect of the utility model, a motor is provided, the motor includes the split hollow shaft as described above. Specifically, the split hollow shaft can be installed inside the motor shell.
[0041] In use, the mandrel body 100 includes the first shaft section 1, the second shaft section 2 and the third shaft section 3 connected in sequence in the axial direction. The first shaft section 1 and the second shaft section 2 are laser welded, and the third shaft section 3 is interference pressed with the second shaft section 2. Such arrangement can improve the machining efficiency and machine tool utilization rate of the mandrel body 100, and can reduce the manufacturing difficulty. In addition, the first cavity 10, the second cavity 20 and the third cavity 30 are arranged in the first shaft section 1, the second shaft section 2 and the third shaft section 3 respectively, thereby the weight of the mandrel body 100 can be reduced.
[0042] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the same, and the protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can make modifications or easily think of changes to the technical solutions recorded in the foregoing embodiments within the technical scope disclosed by the present application, or make equivalent replacements to some technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A split-type hollow shaft, disposed in a motor, characterized in that, The split hollow shaft comprises: a mandrel body comprising a plurality of shaft segments connected in sequence along an axial direction; and a multi-segment hollow cavity arranged inside the plurality of shaft segments along the axial direction of the mandrel body; the plurality of shaft segments comprise: a first shaft segment arranged at a first end of the mandrel body; a second shaft segment arranged at a middle part of the mandrel body, the second shaft segment being connected with the first shaft segment; and a third shaft segment arranged at a second end of the mandrel body, the third shaft segment being connected with the second shaft segment; an end of the first shaft segment is formed with a boss portion in a radial direction, a first end of the second shaft segment is laser welded with the boss portion; an inside of a second end of the second shaft segment is formed with an annular mounting groove, the third shaft segment is inserted and mounted in the mounting groove, and the second end of the second shaft segment is interference press-fitted with the third shaft segment.
2. The split hollow shaft of claim 1, wherein the multi-segment hollow cavity comprises a first hollow cavity arranged in the first shaft segment, the first hollow cavity is tapered at a position corresponding to the boss portion.
3. The split hollow shaft of claim 2, wherein the multi-segment hollow cavity further comprises a second hollow cavity formed in a cylindrical shape, the second hollow cavity is arranged inside the second shaft segment, and the second hollow cavity is communicated with the first hollow cavity.
4. The split hollow shaft of claim 3, wherein the multi-segment hollow cavity further comprises a third hollow cavity arranged inside the third shaft segment, the third hollow cavity is communicated with the second hollow cavity, and the third hollow cavity comprises a plurality of cylindrical cavity portions with different diameters arranged along the axial direction, the third hollow cavity being communicated with the second end of the mandrel body.
5. The split hollow shaft of claim 4, wherein the first shaft segment is provided with a first oil outlet hole in the radial direction, the first oil outlet hole being communicated with the first hollow cavity; the second shaft segment is provided with a second oil outlet hole in the radial direction, the first oil outlet hole being communicated with the second hollow cavity; and the third shaft segment is provided with a third oil outlet hole in the radial direction, the third oil outlet hole being communicated with the third hollow cavity.
6. The split hollow shaft according to any one of claims 1 to 5, characterized in that a wall thickness of the mandrel body at a position where the multi-segment hollow cavity is arranged is 5mm-7mm.
7. An electric machine characterized by the motor comprises the split hollow shaft according to any one of claims 1 to 6.