Permanent magnet motor magnetic steel with anti-falling function

Abstract

The utility model relates to the technical field of permanent magnet motors, in particular to permanent magnet motor magnetic steel with an anti-falling function, which comprises a motor rotor main body, and a first groove is arranged on the outer wall of the motor rotor main body. According to the permanent magnet motor magnetic steel with the anti-falling function, even if the threaded connection relation between the first thread and the second thread is loosened along with high-speed rotation of the motor rotor main body, the loosening direction is certainly opposite to the screwing direction of the first thread and the second thread, but the magnetic steel is prevented from falling off due to the fact that the limiting block is located in the outer wall and the inner wall of the magnetic steel mounting arc-shaped groove. At the moment, the outer wall of the limiting block abuts against the inner wall of the magnetic steel installation arc-shaped groove, so that the limiting block cannot move circumferentially to the inner wall of the magnetic steel installation arc-shaped groove, the rotation position of the anti-disengaging cover is limited at the moment, the anti-disengaging cover cannot be reversely screwed out of the magnetic steel installation arc-shaped groove, and the phenomenon that the anti-disengaging cover disengages due to the rotor rotating at a high speed is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet motors, in particular to a permanent magnet motor magnetic steel with an anti-falling function. Background Art

[0002] Magnetic steel generally refers to aluminum-nickel-cobalt alloy. Magnetic steel is composed of several hard and strong metals, such as iron, aluminum, nickel, cobalt, etc., and sometimes copper, niobium, and tantalum. It is used to make super-hard permanent magnetic alloys, usually used on the rotor of permanent magnet motors.

[0003] The existing magnets on the market need to be inserted into the preset slots on the rotor when in use, and the magnets are fixed to the inner wall of the slots through a glue dispensing process. However, this method is prone to glue overflow and solidification on the outer wall of the rotor, causing the outer wall to be uneven, which does not meet actual usage requirements. Utility Model Content

[0004] The utility model provides a permanent magnet motor magnet with an anti-falling function, which has the beneficial effect of preventing the magnet from falling off, and solves the problem mentioned in the above background technology that the magnet is fixed to the inner wall of the groove by a glue dispensing process, but this method is prone to glue overflow, solidifying on the outer wall of the rotor, resulting in an uneven outer wall, which does not meet the actual use requirements. In order to achieve the above purpose, the utility model provides the following technical solutions: a permanent magnet motor magnet with an anti-falling function, including a motor rotor body, the outer wall of the motor rotor body is provided with a first groove, the inner wall of the first groove is threadedly connected to an anti-falling cover, the outer wall of the anti-falling cover is provided with a second groove, the inner wall of the second groove is fixedly connected to a reset spring, and the reset spring is provided in plurality, one end of the plurality of reset springs is fixedly connected to a limit block, and the outer wall of the limit block is provided with an inclined surface.

[0005] As an optional solution for a permanent magnet motor magnetic steel with an anti-falling function described in the utility model, wherein: a motor stator body is slidably provided on the outer wall of the motor rotor body, and the inner contour of the motor stator body matches the outer contour of the motor rotor body.

[0006] As an optional solution for a permanent magnet motor magnet with an anti-dropping function described in the utility model, wherein: the inner wall of the first groove is provided with a first thread, the inner wall of the anti-dropping cover is provided with a second thread, and the first thread and the second thread are matched.

[0007] As an optional solution for the permanent magnet motor magnetic steel with an anti-dropping function described in the utility model, the outer contour of the anti-dropping cover matches the inner contour of the first groove.

[0008] As an optional scheme for a permanent magnet motor magnet with an anti-falling function described in the utility model, wherein: the inner wall of the first groove is provided with a magnet installation arc groove, and there are multiple magnet installation arc grooves, and the magnet installation arc groove is arranged as a groove body with an arc-shaped cross-section.

[0009] As an optional solution for a permanent magnet motor magnet with an anti-falling function described in the utility model, the inner wall of the magnet installation arc groove is provided with a magnet body, the outer contour of the magnet body is matched with the inner contour of the magnet installation arc groove, and the magnet body is arranged as an arc-shaped cross-section.

[0010] As an optional solution for the permanent magnet motor magnetic steel with an anti-falling function described in the utility model, wherein: the outer wall of the motor rotor body is provided with a second through hole, and the second through hole penetrates the motor rotor body.

[0011] As an optional solution for a permanent magnet motor magnet with an anti-falling function described in the utility model, the outer wall of the anti-falling cover is provided with a first through hole, the first through hole passes through the anti-falling cover, and the first through hole is arranged on the same straight line as the second through hole.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the utility model, the anti-dropout cover is aligned with the first groove, and the anti-dropout cover is rotated, so that the anti-dropout cover is threadedly connected with the first thread of the inner wall of the first groove through the second thread, so that the anti-dropout cover is continuously moved toward the first groove, and finally the anti-dropout cover is completely entered into the first groove, so that the anti-dropout cover blocks the magnetic steel body from moving and falling along the notch of the magnetic steel installation arc groove. At this time, there is no moving space for the lateral movement and longitudinal movement of the magnetic steel installation arc groove, and the installation of the magnetic steel body has a good anti-dropout effect, and the position of the magnetic steel body can be fixedly installed without using a dispensing process.

[0014] In the utility model, even if the threaded connection between the first thread and the second thread is loosened with the high-speed rotation of the motor rotor body, the loosening direction must be opposite to the tightening direction of the first thread and the second thread. However, since the limit block is located between the outer wall and the inner wall of the magnetic steel mounting arc groove, the outer wall of the limit block will conflict with the inner wall of the magnetic steel mounting arc groove at this time, resulting in the limit block being unable to move in a circle on the inner wall of the magnetic steel mounting arc groove. Therefore, the rotation position of the anti-detachment cover is restricted at this time, and it cannot be reversely screwed out of the magnetic steel mounting arc groove, thereby preventing the anti-detachment cover from falling off due to the high-speed rotating rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2It is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the anti-drop cover structure of the utility model;

[0018] Figure 4 For the utility model Figure 3 A magnified view of the structure at center;

[0019] Figure 5 It is a top view of the structure section of the utility model.

[0020] In the figure: 1. motor stator body; 2. motor rotor body; 3. first groove; 4. first thread; 5. magnetic steel mounting arc groove; 6. magnetic steel body; 7. anti-drop cover; 8. second thread; 9. second groove; 10. reset spring; 11. limit block; 12. inclined surface; 13. first through hole; 14. second through hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] This embodiment is intended to promote the solution of the problem that the existing magnetic steel on the market needs to be inserted into the preset slot on the rotor when in use, and the magnetic steel is fixed to the inner wall of the slot by a glue dispensing process. However, this method is prone to cause the glue to overflow and solidify on the outer wall of the rotor, resulting in an uneven outer wall, which does not meet the actual use requirements. Please refer to Figure 1-Figure 5 A permanent magnet motor magnet with an anti-drop function comprises a motor rotor body 2, a first groove 3 is formed on the outer wall of the motor rotor body 2, and an anti-drop cover 7 is threadedly connected to the inner wall of the first groove 3;

[0024] The motor stator body 1 is slidably arranged on the outer wall of the motor rotor body 2, and the inner contour of the motor stator body 1 matches the outer contour of the motor rotor body 2;

[0025] The inner wall of the first groove 3 is provided with a first thread 4, the inner wall of the anti-drop cover 7 is provided with a second thread 8, and the first thread 4 and the second thread 8 are matched;

[0026] The outer contour of the anti-drop cover 7 matches the inner contour of the first groove 3;

[0027] The inner wall of the first groove 3 is provided with a magnetic steel installation arc groove 5, and a plurality of magnetic steel installation arc grooves 5 are provided, and the magnetic steel installation arc grooves 5 are provided as a groove body with an arc-shaped cross section;

[0028] The inner wall of the magnetic steel installation arc groove 5 is provided with a magnetic steel body 6, the outer contour of the magnetic steel body 6 matches the inner contour of the magnetic steel installation arc groove 5, and the magnetic steel body 6 is set to an arc-shaped cross section;

[0029] A second through hole 14 is formed on the outer wall of the motor rotor body 2, and the second through hole 14 penetrates the motor rotor body 2;

[0030] A first through hole 13 is formed on the outer wall of the anti-detachment cover 7 . The first through hole 13 penetrates the anti-detachment cover 7 . The first through hole 13 and the second through hole 14 are arranged on the same straight line.

[0031] In this embodiment: the existing magnets on the market need to be inserted into the preset slots on the rotor when in use, and the magnets are fixed to the inner wall of the slots by a glue dispensing process. However, this method easily causes the glue to overflow and solidify on the outer wall of the rotor, resulting in an uneven outer wall, which does not meet actual use requirements.

[0032] Therefore, in order to avoid the above situation, the magnetic steel body 6 is set as a sheet with an arc-shaped cross section, and multiple magnetic steel bodies 6 are inserted into the reserved magnetic steel installation arc groove 5 along the circumferential direction. Since the contours of the magnetic steel body 6 and the magnetic steel installation arc groove 5 are matched, the magnetic steel body 6 can slide in the magnetic steel installation arc groove 5 except for the upper and lower notches of the magnetic steel installation arc groove 5. The left and right directions of the magnetic steel body 6 are consistent with the groove of the magnetic steel installation arc groove 5 and there is no space for movement;

[0033] Then, align the anti-dropout cover 7 with the first groove 3, rotate the anti-dropout cover 7, and cause the anti-dropout cover 7 to be threadedly connected with the first thread 4 on the inner wall of the first groove 3 through the second thread 8, so that the anti-dropout cover 7 continuously moves toward the first groove 3, and finally causes the anti-dropout cover 7 to completely enter the first groove 3, so that the anti-dropout cover 7 blocks the magnetic steel body 6 from moving and falling off along the notch of the magnetic steel installation arc groove 5. At this time, there is no space for the lateral and longitudinal movement of the magnetic steel installation arc groove 5, and the installation of the magnetic steel body 6 has a good anti-dropout effect, and the position of the magnetic steel body 6 can be fixedly installed without using a dispensing process.

[0034] Embodiment 2

[0035] The present embodiment is intended to promote the solution of the problem that in the first embodiment, the anti-detachment cover 7 is threadedly connected to the inner wall of the first groove 3 through the threaded connection relationship between the anti-detachment cover 7 and the first groove 3, thereby preventing the magnetic steel body 6 from escaping from the moving track of the magnetic steel mounting arc groove 5. However, since the motor rotor body 2 is in a state of continuous high-speed rotation after being put into use, the threaded connection between the anti-detachment cover 7 and the first groove 3 is easily loosened by simply using the threaded connection relationship, which may easily cause the anti-detachment cover 7 to fall off over time. The fallen anti-detachment cover 7 may damage the high-speed rotating rotor, and the magnetic steel in the rotor may lose its limit position, resulting in the problem of falling off. The present embodiment is an improvement made on the basis of the first embodiment. For details, please refer to Figure 1-Figure 5 A second groove 9 is provided on the outer wall of the anti-drop cover 7, a return spring 10 is fixedly connected to the inner wall of the second groove 9, a plurality of return springs 10 are provided, one end of the plurality of return springs 10 is fixedly connected to a limiting block 11, and an outer wall of the limiting block 11 is provided with a slope 12.

[0036] In the present embodiment: In the first embodiment, the anti-detachment cover 7 is threadedly connected to the inner wall of the first groove 3 through the threaded connection relationship between the anti-detachment cover 7 and the first groove 3, thereby preventing the magnetic steel body 6 from being separated from the moving track of the magnetic steel mounting arc groove 5. However, since the motor rotor body 2 is in a state of continuous high-speed rotation after being put into use, the threaded connection between the anti-detachment cover 7 and the first groove 3 is easily loosened by simply using the threaded connection relationship, which may easily cause the anti-detachment cover 7 to fall off over time. The fallen anti-detachment cover 7 may damage the high-speed rotating rotor, and the magnetic steel in the rotor may lose its limit position, resulting in falling off;

[0037] In order to avoid the above situation, when the anti-detachment cover 7 is screwed with the thread in the first groove 3, the rotation of the anti-detachment cover 7 will also cause the reset spring 10 and the limit block 11 in the second groove 9 opened on the inner wall of the anti-detachment cover 7 to rotate together. At this time, as the thread of the anti-detachment cover 7 continues to rotate deeper into the first groove 3, the limit block 11 will also gradually rotate and move downward to contact the notch of the magnetic steel mounting arc groove 5 in the first groove 3. However, since the outer wall of the limit block 11 is provided with an inclined surface 12, the inclined surface 12 can also contact the notch of the magnetic steel mounting arc groove 5 when it rotates and contacts the magnetic steel mounting arc groove 5, so that the limit block 11 generates an upward force. The limit block 11 squeezes the reset spring 10 upward and moves into the second groove 9. The anti-detachment cover 7 can still continue to rotate the thread and move downward. When the anti-detachment cover 7 is completely rotated After being screwed into the first groove 3 and the threads of the first thread 4 and the second thread 8 are tightened to the maximum extent, the limit block 11 is located in the corresponding magnetic steel mounting arc groove 5 below. At this time, even if the threaded connection between the first thread 4 and the second thread 8 is loosened with the high-speed rotation of the motor rotor body 2, the loosening direction must be opposite to the tightening direction of the first thread 4 and the second thread 8. However, since the limit block 11 is located between the outer wall and the inner wall of the magnetic steel mounting arc groove 5, the outer wall of the limit block 11 will conflict with the inner wall of the magnetic steel mounting arc groove 5, resulting in the limit block 11 being unable to move in a circle at the inner wall of the magnetic steel mounting arc groove 5. Therefore, the rotation position of the anti-detachment cover 7 is restricted at this time, and it is impossible to reversely screw out of the magnetic steel mounting arc groove 5, thereby preventing the anti-detachment cover 7 from falling off due to the high-speed rotating rotor.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A permanent magnet motor magnet with an anti-drop function, comprising a motor rotor body (2), characterized in that: The outer wall of the motor rotor body (2) is provided with a first groove (3), the inner wall of the first groove (3) is threadedly connected with an anti-drop cover (7), the outer wall of the anti-drop cover (7) is provided with a second groove (9), the inner wall of the second groove (9) is fixedly connected with a return spring (10), a plurality of return springs (10) are provided, one end of the plurality of return springs (10) is fixedly connected with a limit block (11), and the outer wall of the limit block (11) is provided with an inclined surface (12).

2. The permanent magnet motor magnetic steel with anti-falling function according to claim 1 is characterized in that: The motor stator body (1) is slidably arranged on the outer wall of the motor rotor body (2), and the inner contour of the motor stator body (1) matches the outer contour of the motor rotor body (2).

3. The permanent magnet motor magnetic steel with anti-falling function according to claim 2 is characterized in that: The inner wall of the first groove (3) is provided with a first thread (4), and the inner wall of the anti-drop cover (7) is provided with a second thread (8), and the first thread (4) and the second thread (8) are matched.

4. The permanent magnet motor magnetic steel with anti-falling function according to claim 3 is characterized in that: The outer contour of the anti-drop cover (7) matches the inner contour of the first groove (3).

5. The permanent magnet motor magnetic steel with anti-falling function according to claim 4 is characterized in that: The inner wall of the first groove (3) is provided with a magnetic steel mounting arc groove (5), a plurality of the magnetic steel mounting arc grooves (5) are provided, and the magnetic steel mounting arc grooves (5) are provided as groove bodies with arc-shaped cross-sections.

6. The permanent magnet motor magnetic steel with anti-falling function according to claim 5, characterized in that: The inner wall of the magnetic steel mounting arc groove (5) is provided with a magnetic steel body (6), the outer contour of the magnetic steel body (6) matches the inner contour of the magnetic steel mounting arc groove (5), and the magnetic steel body (6) is arranged to have an arc-shaped cross section.

7. The permanent magnet motor magnetic steel with anti-falling function according to claim 6, characterized in that: The outer wall of the motor rotor body (2) is provided with a second through hole (14), and the second through hole (14) passes through the motor rotor body (2).

8. The permanent magnet motor magnetic steel with anti-falling function according to claim 7, characterized in that: The outer wall of the anti-detachment cover (7) is provided with a first through hole (13), the first through hole (13) passes through the anti-detachment cover (7), and the first through hole (13) and the second through hole (14) are arranged on the same straight line.

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