Easy-to-install motor rotor structure

Abstract

The utility model provides an easy installation motor rotor structure belongs to motor rotor technical field. It includes motor rotor, the outer edge of motor rotor is provided with a plurality of for inserting the bar mounting groove of rotor bar along the circumference, rotor bar and bar mounting groove adopt non interference fit installation, the left and right side wall of rotor bar left and right side wall and bar mounting groove left and right side inner wall size are compatible, the gap that has between rotor bar front side inner wall and bar mounting groove front side inner wall all has a section, the inner wall of motor rotor can detachably be provided with the compression ring structure for fixed rotor bar. Through non interference fit and the cooperation of detachable compression ring structure, avoided the complex technology of traditional interference assembly, reduced the installation difficulty, simultaneously, the compression ring structure provided axial constraint, ensured the stability of rotor bar when high -speed rotation, solved the problem that the non interference fit led to the loosening on the basis of reducing the installation difficulty.

Description

Technical Field

[0001] This utility model belongs to the field of motor rotor technology and relates to an easy-to-install motor rotor structure. Background Technology

[0002] In the prior art, in order to firmly embed the guide bar into the iron core slot and prevent it from loosening due to vibration, centrifugal force, etc. when rotating at high speed or being impacted by electromagnetic force, thereby improving the reliability of motor operation, the rotor guide bar and the iron core slot are usually subjected to an interference fit, which makes installation difficult.

[0003] For example, a Chinese patent discloses a plastic magnetic rotor with an anti-detachment shaft structure [application number: 202420270811.2], which includes a plastic magnet and a rotor shaft. The plastic magnet is sleeved and installed on the outer surface of the rotor shaft to form a plastic magnetic rotor. The surfaces of the plastic magnet and the rotor shaft are provided with a locking structure. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing an easy-to-install motor rotor structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An easy-to-install motor rotor structure includes a motor rotor. The outer edge of the motor rotor has several guide bar mounting slots circumferentially arranged for inserting rotor guide bars. The rotor guide bars and guide bar mounting slots are installed with a non-interference fit. The left and right sidewalls of the rotor guide bars are adapted to the dimensions of the left and right inner walls of the guide bar mounting slots. There is a gap between the front and rear inner walls of the rotor guide bars and the front and rear inner walls of the guide bar mounting slots. A pressure ring structure for fixing the rotor guide bars is detachably provided on the inner wall of the motor rotor.

[0007] In the aforementioned easy-to-install motor rotor structure, the pressure ring structure includes an inner pressure ring and an outer pressure ring. The inner ring and the outer pressure ring are recessed inward and provided with guide bar limiting grooves. The guide bar limiting grooves can abut against the upper end face of the rotor guide bar.

[0008] In the aforementioned easy-to-install motor rotor structure, the cross-section of the guide bar limiting groove is annular.

[0009] In the aforementioned easy-to-install motor rotor structure, both the inner pressure ring and the outer pressure ring are fixed to the motor rotor by several bolts.

[0010] In the aforementioned easy-to-install motor rotor structure, the inner end face of the motor rotor is provided with a pressure ring mounting groove that is compatible with the inner pressure ring and the outer pressure ring.

[0011] In the aforementioned easy-to-install motor rotor structure, the upper end faces of the inner and outer pressure rings are flush with the inner end face of the motor rotor.

[0012] In the aforementioned easy-to-install motor rotor structure, the inner pressure ring and the outer pressure ring are an integral structure.

[0013] In the aforementioned easy-to-install motor rotor structure, the inner pressure ring and the outer pressure ring are separate structures.

[0014] In the aforementioned easy-to-install motor rotor structure, both the inner and outer pressure rings are composed of several arc-shaped pressure ring segments.

[0015] In the aforementioned easy-to-install motor rotor structure, one end of the arc-shaped pressure ring is provided with a semi-circular protrusion, and the other end is recessed inward with a groove. The cross-section of the middle part of the groove is arc-shaped, and arc-shaped transition sections are provided on both sides of the groove.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. By combining a non-interference fit with a detachable pressure ring structure, the complex process of traditional interference fit is avoided, reducing the installation difficulty. At the same time, the pressure ring structure provides axial constraint to ensure the stability of the rotor guide bar during high-speed rotation, thus solving the loosening problem caused by the non-interference fit while reducing the installation difficulty.

[0018] 2. The pressure ring structure adopts a double-layer design of inner and outer pressure rings, and abuts against the upper end face of the rotor guide bar through the annular guide bar limiting groove to form axial constraint. This structure solves the problem of unstable fixation of traditional single pressure rings, so that the rotor guide bar can still maintain positional accuracy under electromagnetic force impact, while avoiding stress concentration caused by interference fit, thus improving structural reliability.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a top view of the motor rotor in Embodiment 1;

[0021] Figure 2 This is a cross-sectional view of the motor rotor in Embodiment 1;

[0022] Figure 3 This is a schematic diagram of the external pressure ring in Example 2;

[0023] Figure 4 This is a schematic diagram of the arc-shaped pressure ring in Example 2;

[0024] Figure 5 yes Figure 3 Enlarged diagram of point A in the middle.

[0025] In the figure, the components are: 1. Motor rotor; 2. Rotor guide bar; 3. Guide bar mounting groove; 4. Pressure ring structure; 5. Inner pressure ring; 6. Outer pressure ring; 7. Guide bar limiting groove; 8. Arc-shaped pressure ring; 9. Semi-circular protrusion; 10. Groove; 11. Arc-shaped transition section; 12. Pressure ring mounting groove. Detailed Implementation

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, an easy-to-install motor rotor structure includes a motor rotor 1. The outer edge of the motor rotor 1 is provided with a plurality of guide bar mounting grooves 3 for inserting rotor guide bars 2 along the circumferential direction. The rotor guide bars 2 and the guide bar mounting grooves 3 are installed with a non-interference fit. The left and right side walls of the rotor guide bars 2 are adapted to the left and right inner walls of the guide bar mounting grooves 3. There is a gap between the front and rear inner walls of the rotor guide bars 2 and the front and rear inner walls of the guide bar mounting grooves 3. A pressure ring structure 4 for fixing the rotor guide bars 2 is detachably provided on the inner wall of the motor rotor 1.

[0028] In this invention, the complex process of traditional interference fit is avoided and the installation difficulty is reduced by using a non-interference fit (fitting only on the left and right sides, with a gap left on the front and rear sides) and a detachable pressure ring structure. At the same time, the pressure ring structure provides axial constraint to ensure the stability of the rotor guide bar when rotating at high speed, thus solving the loosening problem caused by the non-interference fit while reducing the installation difficulty.

[0029] Specifically, the pressure ring structure 4 includes an inner pressure ring 5 and an outer pressure ring 6. The inner rings of both the inner and outer pressure rings have inwardly recessed guide bar limiting grooves 7, which abut against the upper end face of the rotor guide bar 2. The pressure ring structure employs a double-layer design with inner and outer pressure rings, and the annular guide bar limiting grooves abut against the upper end face of the rotor guide bar, forming an axial constraint. This structure solves the problem of unstable fixation with a traditional single pressure ring, allowing the rotor guide bar to maintain positional accuracy under electromagnetic force impact, while avoiding stress concentration caused by interference fits, thus improving structural reliability.

[0030] Specifically, the guide bar limiting groove 7 has an annular cross-section. The annular cross-section design of the guide bar limiting groove ensures a uniform distribution of the contact area between the pressure ring and the rotor guide bar, eliminating local stress concentration points. This design solves the problem of guide bar deformation caused by traditional rectangular cross-section limiting grooves, ensuring the stability of the guide bar during high-speed rotation, and improving the service life of the pressure ring.

[0031] Specifically, both the inner pressure ring 5 and the outer pressure ring 6 are fixed to the motor rotor 1 by several bolts. This bolt fixing method allows the pressure ring structure to be disassembled, facilitating later maintenance and replacement. This design solves the problem of traditional welded or one-piece molded pressure rings being unrepairable, reducing equipment maintenance costs. Simultaneously, the bolt preload can be precisely controlled, ensuring uniform constraint force of the pressure ring on the guide bar and improving assembly accuracy.

[0032] Specifically, the inner end face of the motor rotor 1 is provided with a pressure ring mounting groove 12 that is adapted to the inner pressure ring 5 and the outer pressure ring 6. The pressure ring mounting groove design on the inner end face of the motor rotor provides precise positioning and support for the pressure ring, ensuring the coaxiality of the pressure ring and the guide bar. This design solves the problem of easy misalignment in traditional pressure ring installation, makes the guide bar evenly stressed, avoids vibration and noise caused by the tilt of the pressure ring, and improves the smoothness of motor operation.

[0033] Specifically, the upper surfaces of the inner pressure ring 5 and the outer pressure ring 6 are flush with the inner end face of the motor rotor 1. This design, where the upper surfaces of the inner and outer pressure rings are flush with the inner end face of the motor rotor, eliminates the stepped structure, making the overall rotor structure more compact. This design solves the problem of increased wind resistance caused by the protruding pressure rings in traditional designs, reducing motor energy consumption. At the same time, the flat end faces prevent the accumulation of dust and impurities, extending the equipment cleaning cycle.

[0034] Specifically, the inner pressure ring 5 and the outer pressure ring 6 are an integrated structure. The integrated pressure ring structure reduces the number of parts and simplifies the assembly process. This design solves the problem of low assembly efficiency of traditional split pressure rings and shortens the production cycle. At the same time, the integrated structure has higher rigidity, which can effectively resist deformation caused by electromagnetic forces and improve structural stability.

[0035] Example 2

[0036] The structure and working principle of Embodiment 2 are basically the same as those of Embodiment 1, with the following differences: Figures 3-5 As shown:

[0037] Specifically, the inner pressure ring 5 and the outer pressure ring 6 are separate structures. The separate pressure ring design makes it easier to accommodate rotor bars of different specifications. This structure solves the problem of poor versatility of traditional integrated pressure rings. By replacing pressure ring components of different sizes, it can be adapted to various motor models, reducing mold development costs and improving the market adaptability of the product.

[0038] Specifically, both the inner pressure ring 5 and the outer pressure ring 6 are composed of several arc-shaped pressure ring segments 8. The segmented design of the arc-shaped pressure rings further enhances assembly flexibility. This structure solves the problem of difficult installation of traditional integral pressure rings in confined spaces. By installing the arc-shaped pressure rings segment by segment, the assembly of complex structures can be easily completed, making it particularly suitable for maintenance scenarios of large motor rotors.

[0039] Specifically, the arc-shaped pressure ring 8 has a semi-circular protrusion 9 at one end and a recessed groove 10 at the other end. The groove 10 has an arc-shaped cross-section in the middle and arc-shaped transition sections 11 on both sides. The protrusion and groove of the arc-shaped pressure ring are designed to cooperate, and the arc-shaped transition sections achieve a smooth connection, ensuring the continuity of the pressure ring in the circumferential direction. This design solves the problem of stress concentration at the connection of traditional segmented pressure rings, making the constraint force of the pressure ring on the guide bar evenly distributed, thus improving the reliability and service life of the structure.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0041] Although this article frequently uses terms such as motor rotor 1, rotor guide bar 2, guide bar mounting groove 3, pressure ring structure 4, inner pressure ring 5, outer pressure ring 6, guide bar limiting groove 7, arc-shaped pressure ring 8, semi-circular protrusion 9, groove 10, arc-shaped transition section 11, and pressure ring mounting groove 12, these terms are used merely to more conveniently describe and explain the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. An easy-to-install motor rotor structure, comprising a motor rotor (1), wherein the outer edge of the motor rotor (1) is provided with a plurality of guide bar mounting grooves (3) for inserting rotor guide bars (2) along the circumferential direction, characterized in that, The rotor guide bar (2) and the guide bar mounting groove (3) are installed with a non-interference fit. The left and right side walls of the rotor guide bar (2) are matched with the left and right inner walls of the guide bar mounting groove (3). There is a gap between the front and rear inner walls of the rotor guide bar (2) and the front and rear inner walls of the guide bar mounting groove (3). The inner wall of the motor rotor (1) is detachably provided with a pressure ring structure (4) for fixing the rotor guide bar (2).

2. The easy-to-install motor rotor structure according to claim 1, characterized in that, The pressure ring structure (4) includes an inner pressure ring (5) and an outer pressure ring (6). The inner ring (5) and the outer pressure ring (6) are recessed inward and provided with a guide bar limiting groove (7). The guide bar limiting groove (7) can abut against the upper end face of the rotor guide bar (2).

3. The easy-to-install motor rotor structure according to claim 2, characterized in that, The cross-section of the guide bar limiting groove (7) is annular.

4. The easy-to-install motor rotor structure according to claim 2, characterized in that, The inner pressure ring (5) and the outer pressure ring (6) are both fixed to the motor rotor (1) by several bolts.

5. The easy-to-install motor rotor structure according to claim 4, characterized in that, The inner end face of the motor rotor (1) is provided with a pressure ring mounting groove (12) that is compatible with the inner pressure ring (5) and the outer pressure ring (6).

6. The easy-to-install motor rotor structure according to claim 5, characterized in that, The upper end faces of the inner pressure ring (5) and the outer pressure ring (6) are flush with the inner end face of the motor rotor (1).

7. The easy-to-install motor rotor structure according to claim 2, characterized in that, The inner pressure ring (5) and the outer pressure ring (6) are an integral structure.

8. The easy-to-install motor rotor structure according to claim 2, characterized in that, The inner pressure ring (5) and the outer pressure ring (6) are separate structures.

9. The easy-to-install motor rotor structure according to claim 8, characterized in that, The inner pressure ring (5) and the outer pressure ring (6) are both composed of several arc-shaped pressure rings (8).

10. The easy-to-install motor rotor structure according to claim 9, characterized in that, The arc-shaped pressure ring (8) has a semi-circular protrusion (9) at one end and a groove (10) recessed inward at the other end. The cross-section of the groove (10) is arc-shaped and arc-shaped transition sections (11) are provided on both sides of the groove (10).

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