Motor rotor bearing pressing tooling and pressing device

Abstract

This utility model belongs to the field of motor assembly technology, and particularly relates to a motor rotor bearing pressing fixture. This utility model provides a motor rotor bearing pressing fixture, comprising: an annular sleeve, which is vertically fixed on a base and used to accommodate the motor rotor; a lower pressing head, located at the bottom of the annular sleeve, used to limit the lower bearing installed at the lower end of the motor rotor; and an upper pressing head, which has a strong magnet embedded inside to attract and fix the upper bearing installed at the upper end of the motor rotor. The upper and lower pressing heads press against each other within the annular sleeve to press the upper and lower bearings onto the corresponding ends of the motor rotor. By using the upper and lower pressing heads, the bearings at both ends of the rotor can be pressed synchronously onto the outer wall of the rotor, avoiding relative wobbling of the upper and lower bearings during pressing and improving assembly accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of motor assembly technology, and in particular relates to motor rotor bearing pressing tooling and pressing device. Background Technology

[0002] In the motor assembly process, accurately and reliably pressing the bearings onto the motor rotor shaft is a crucial step. The quality of this step directly affects the motor's assembly accuracy, operational stability, noise level, and service life.

[0003] In related technologies, common bearing press-fitting methods used in the industry include using a simple hand press with a special press head, or using relatively simple press-fitting fixtures. However, these press-fitting methods are prone to bearing tilting or displacement due to uneven force or unstable positioning at the initial application of force or the moment of press-fitting, resulting in poor press-fitting stability and insufficient accuracy, and an increased scrap rate.

[0004] Therefore, improving the stability and precision of motor rotor bearings is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Utility Model Content

[0006] This disclosure provides at least one motor rotor bearing pressing fixture and pressing device.

[0007] In a first aspect, embodiments of this disclosure provide a motor rotor bearing pressing fixture, comprising:

[0008] An annular sleeve, which is vertically fixed to the base;

[0009] The lower pressure head, located at the bottom of the annular sleeve, is used to limit the lower bearing;

[0010] The upper pressure head is vertically mounted on the inner wall of the annular sleeve, and its outer wall matches the inner wall of the annular sleeve.

[0011] The upper pressure head is equipped with a strong magnet, which is used to attract and fix the upper bearing before pressing.

[0012] The upper pressure head moves downward to press the upper and lower bearings onto the outer wall of the rotor.

[0013] In one optional embodiment, the upper pressure head is an annular structure with fixing blocks symmetrically arranged on its outer wall;

[0014] The inner wall of the annular sleeve is symmetrically provided with guide grooves, and the fixing block is slidably disposed in the guide grooves.

[0015] In one alternative embodiment, a compression spring is provided on the bottom wall of the fixing block, and the lower end of the compression spring abuts against the base.

[0016] In one optional embodiment, the outer wall of the annular sleeve is symmetrically provided with operating holes on both sides, and the inner diameter of the operating holes is not less than the diameter of the lower bearing.

[0017] In one alternative embodiment, the strong magnet is a ring-shaped stepped mechanism, and the distance between its bottom wall and the bottom wall of the upper pressure head is equal to the axial height of the upper bearing.

[0018] In one alternative embodiment, the pressure head is an annular structure, with its annular inner wall matching the outer wall of the lower bearing.

[0019] In one optional embodiment, the inner wall of the lower pressure head is provided with a support platform, which abuts against the bottom wall of the lower bearing.

[0020] In one alternative embodiment, the top of the upper pressure head is provided with a connecting portion for connecting to the driving device.

[0021] Secondly, embodiments of this disclosure provide a motor rotor pressing device, comprising:

[0022] The drive unit is located above the motor rotor bearing pressing fixture and is suitable for applying pressure to the upper pressure head.

[0023] Thirdly, this disclosure provides an upper pressure head for a motor rotor bearing pressing fixture, comprising: a strong magnet disposed inside to attract and fix an upper bearing for mounting on the upper end of a motor rotor;

[0024] The upper pressure head is a ring structure with fixing blocks symmetrically arranged on its outer wall;

[0025] The inner wall of the annular sleeve is symmetrically provided with guide grooves, and the fixing block is slidably disposed in the guide grooves.

[0026] The beneficial effects of this utility model are that it provides a motor rotor bearing pressing fixture. Through the cooperation of the upper pressing head, the lower pressing head and the annular sleeve, a strong magnet attracts the upper bearing before pressing to prevent the upper bearing from shifting in the initial stage of pressing. The mutual matching of the upper pressing head and the annular sleeve can ensure the stability of the upper pressing head when pressing downward, ensuring that the upper pressing head presses down vertically without shaking, improving the coaxiality of the bearing installation and improving the installation accuracy.

[0027] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 A perspective view of the motor rotor bearing pressing fixture provided in the embodiments of this disclosure;

[0031] Figure 2 A cross-sectional perspective view of the annular sleeve and upper pressure head provided in an embodiment of this disclosure.

[0032] In the picture:

[0033] 1. Annular sleeve; 10. Guide groove; 11. Operating hole; 2. Base; 3. Lower pressure head; 30. Support platform; 4. Upper pressure head; 40. Strong magnet; 41. Fixing block; 42. Compression spring; 43. Connecting part;

[0034] 5. Rotor; 51. Upper bearing; 52. Lower bearing. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0037] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0038] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0039] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0040] Research has revealed that, in the relevant technologies, precisely and reliably pressing the bearings onto the motor rotor shaft during motor assembly is a crucial step. The quality of this step directly affects the motor's assembly accuracy, operational stability, noise level, and service life.

[0041] In related technologies, common bearing press-fitting methods used in the industry include using a simple hand press with a special press head, or using relatively simple press-fitting fixtures. However, these press-fitting methods are prone to bearing tilting or displacement due to uneven force or unstable positioning at the initial application of force or the moment of press-fitting, resulting in poor press-fitting stability and insufficient accuracy, and an increased scrap rate.

[0042] Therefore, improving the stability and precision of motor rotor bearings is a technical problem that urgently needs to be solved in this field.

[0043] The defects in the above solutions and the reasons for their occurrence are the results of the inventors' practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventors' contributions to this disclosure.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0046] like Figures 1 to 2 As shown, at least one embodiment provides a motor rotor bearing press-fitting fixture, comprising:

[0047] An annular sleeve 1 is vertically fixed to a base 2. The base 2 is horizontally fixed to a workbench and has a positioning ring that matches the annular sleeve 1 for precise positioning. Operating holes 11 are symmetrically formed on both sides of the outer wall of the annular sleeve 1. The inner diameter of each operating hole 11 is not less than the diameter of the lower bearing 52. The operating holes 11 facilitate observation of the position of the lower bearing 52.

[0048] The lower pressure head 3, located at the bottom of the annular sleeve 1, is used to limit the lower bearing 52. The lower pressure head 3 has an annular structure, and its inner annular wall matches the outer wall of the lower bearing 52. A support platform 30 is provided on the inner wall of the lower pressure head 3, which abuts against the bottom wall of the lower bearing 52. The annular inner wall of the lower pressure head 3 and the outer ring of the lower bearing 52 are in clearance fit, with a clearance ≤ 0.05 mm. The support platform 30 is located below the lower bearing 52 and is used to abut against the bottom end of the lower bearing 52 and precisely limit its height. The upper pressure head 4 is vertically and detachably mounted on the inner wall of the annular sleeve 1. The upper pressure head 4 can detach from the annular sleeve 1 to facilitate the placement of the lower bearing 52, rotor 5, and upper bearing 51 into the annular sleeve 1, with its outer wall matching the inner wall of the annular sleeve 1. A strong magnet 40 is embedded inside the upper pressure head 4 to attract and fix the upper bearing 51 before pressing. When the upper bearing 51 is attracted by the strong magnet 40, the outer ring of the upper bearing 51 is in clearance fit with the inner wall of the upper pressure head 4, with a clearance ≤ 0.05 mm. The upper pressure head 4 moves downward to press the upper bearing 51 and the lower bearing 52 onto the outer wall of the rotor 5.

[0049] Reference Appendix Figure 2 The upper pressure head 4 is a ring structure, and its outer wall is symmetrically provided with fixing blocks 41;

[0050] The annular sleeve 1 has symmetrical guide grooves 10 on its inner wall, and the fixing block 41 is slidably disposed within the guide grooves 10. A compression spring 42 is provided on the bottom wall of the fixing block 41, and the lower end of the compression spring 42 abuts against the base 2. It provides a buffering force when the upper pressure head 4 moves downwards, and pushes the upper pressure head 4 back to its original position after pressing is completed. The strong magnet 40 is an annular stepped mechanism, and the distance between its bottom wall and the bottom wall of the upper pressure head 4 is equal to the axial height of the upper bearing 51. The top of the upper pressure head 4 is provided with a connecting part 43 for connecting to a driving device. The driving device can be a hydraulic cylinder, a pneumatic cylinder, or a servo press, etc.

[0051] The specific workflow is as follows:

[0052] The lower bearing 52, rotor 5, and upper bearing 51 are sequentially placed into the annular sleeve 1. The lower bearing 52 is supported by the support platform 30, and the upper bearing 51 is attracted by the strong magnet 40. The step of the strong magnet 40 provides radial constraint to the upper bearing 51. The movable end of the drive device moves downward to press the upper pressure head 4. The upper pressure head 4 moves downward to press the upper bearing 51 onto the outer wall of the rotor 5. Simultaneously, the lower pressure head 3 is pushed upward by the reaction force, and the support platform 30 presses the lower bearing 52 upward to press the lower bearing 52 onto the outer wall of the rotor shaft simultaneously.

[0053] At least one embodiment provides a motor rotor pressing device, comprising: a motor rotor bearing pressing fixture as described in the above embodiment;

[0054] The drive unit is located above the motor rotor bearing pressing fixture and is adapted to apply pressure to the upper pressure head 4.

[0055] At least one embodiment provides an upper pressure head for a motor rotor bearing pressing tool, characterized in that it includes:

[0056] A strong magnet 40 is installed inside to attract and fix the upper bearing for mounting the upper end of the motor rotor;

[0057] The upper pressure head 4 is a ring structure, and its outer wall is symmetrically provided with fixing blocks 41;

[0058] The inner wall of the annular sleeve 1 is symmetrically provided with guide grooves 10, and the fixing block 41 is slidably disposed in the guide grooves 10.

[0059] In the description of the embodiments of this utility model, 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 utility model based on the specific circumstances.

[0060] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0061] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A motor rotor bearing press-fitting fixture, characterized in that, include: An annular sleeve (1) is vertically fixed on a base (2) and is used to accommodate the motor rotor; The lower pressure head (3) is located at the bottom of the annular sleeve (1) and is used to limit the lower bearing installed at the lower end of the motor rotor; The upper pressure head (4) has a strong magnet (40) embedded inside to attract and fix the upper bearing for mounting the upper end of the motor rotor; The upper and lower pressure heads press within the annular sleeve (1) to press the upper and lower bearings onto the corresponding ends of the motor rotor.

2. The motor rotor bearing pressing fixture as described in claim 1, characterized in that, The upper pressure head (4) is a ring structure, and its outer wall is symmetrically provided with fixing blocks (41). The inner wall of the annular sleeve (1) is symmetrically provided with guide grooves (10), and the fixing block (41) is slidably disposed in the guide grooves (10).

3. The motor rotor bearing pressing fixture as described in claim 2, characterized in that, A compression spring (42) is provided on the bottom wall of the fixing block (41), and the lower end of the compression spring (42) abuts against the base (2).

4. The motor rotor bearing pressing fixture as described in claim 1, characterized in that, The outer wall of the annular sleeve (1) is symmetrically provided with operating holes (11) on both sides, and the inner diameter of the operating holes (11) is not less than the diameter of the lower bearing.

5. The motor rotor bearing pressing fixture as described in claim 1, characterized in that, The strong magnet (40) is a ring-shaped stepped mechanism, and the distance between its bottom wall and the bottom wall of the upper pressure head (4) is equal to the axial height of the upper bearing.

6. The motor rotor bearing pressing fixture as described in claim 1, characterized in that, The lower pressure head (3) has an annular structure, and its annular inner wall matches the outer wall of the lower bearing.

7. The motor rotor bearing pressing fixture as described in claim 6, characterized in that, The inner wall of the lower pressure head (3) is provided with a support platform (30), which abuts against the bottom wall of the lower bearing.

8. The motor rotor bearing pressing fixture as described in claim 1, characterized in that, The top of the upper pressure head (4) is provided with a connecting part (43) for connecting with the driving device.

9. A motor rotor pressing device, characterized in that, include: The motor rotor bearing press-fit tooling as described in any one of claims 1-8; The drive device is located above the motor rotor bearing pressing fixture and is suitable for applying pressure to the upper pressure head (4).

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