Permanent magnet motor shaft

Abstract

The utility model discloses a permanent magnet motor shaft which comprises a first shaft section and a second shaft section, the first shaft section and the second shaft section are fixedly connected through seamless welding, and the right end of the second shaft section is connected with a connecting piece through a locking mechanism. The locking mechanism comprises a locking section, an internal thread, a spring, a locking sleeve, a plurality of limiting holes and a plurality of limiting balls. The locking device has the advantages that the locking mechanism is arranged at the right end of the second shaft section, the locking sleeve is matched with the limiting balls, a connecting piece screwed into the locking section in a suspended mode can be limited, the locking and looseness preventing purposes are achieved, disassembly is convenient, and the limiting block is used for limiting the position of the connecting piece.

Description

Technical Field

[0001] The utility model relates to the technical field of motor shafts, in particular to a permanent magnet motor shaft. Background Art

[0002] Permanent magnet synchronous motors use permanent magnets to provide excitation, making the motor structure simpler, reducing processing and assembly costs, and eliminating collector rings and brushes that are prone to problems, improving the reliability of motor operation; and because no excitation current is required, there is no excitation loss, which improves the efficiency and power density of the motor. Permanent magnet synchronous motors are composed of stators, rotors, end covers and other components, among which the motor shaft is an important component of permanent magnet motors.

[0003] The existing patent application number is CN 202222922261.1, which discloses a permanent magnet motor shaft. Through the cooperation of a worm, a first round rod, a second round rod, a disc, a third round rod, a fourth round rod, a mounting sleeve, an arc groove, a ball, a mounting groove, a groove, a slide, a spring, a slider, an extrusion block, a base layer, a strengthening layer, an anti-corrosion layer and a wear-resistant layer, the motor shaft can be installed on the permanent magnet motor through a high-stability connection structure, and can increase its service life through various functional layers. However, two groups of extrusion blocks are used to extrude the surface of the connector to achieve the purpose of locking and preventing loosening. The connector is inconvenient to disassemble, and after multiple disassemblies, the locking effect of the extrusion block is affected.

[0004] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content

[0005] In view of the above defects, the utility model provides a permanent magnet motor shaft to solve the installation and connection problem of the permanent magnet motor shaft.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A permanent magnet motor shaft comprises a first shaft section and a second shaft section, wherein the first shaft section and the second shaft section are fixedly connected by seamless welding, and the right end of the second shaft section is connected to a connecting piece by a locking mechanism;

[0008] The locking mechanism includes a locking section, an internal thread, a spring, a locking sleeve, a plurality of limiting holes and a plurality of limiting balls. The locking section is located at the right end of the second shaft section, the internal thread is tapped in the locking section, the spring is movably sleeved on the left side of the outer surface of the locking section, the locking sleeve is movably sleeved on the outside of the locking section, a plurality of limiting holes are evenly opened on the right side of the outer surface of the locking section, and a plurality of limiting balls are movably installed in the plurality of limiting holes.

[0009] Furthermore, a limiting block is installed at the left end of the locking section.

[0010] Furthermore, a limiting groove corresponding to the spring is opened on the left side of the locking sleeve, and a bearing groove corresponding to a plurality of limiting balls is opened on the right side of the locking sleeve.

[0011] Furthermore, the outer surface of the left end of the connecting piece is tapped with an outer thread engaged with the inner thread, and the outer surface of the left end of the connecting piece is opened with an annular limiting groove corresponding to a plurality of limiting balls.

[0012] Furthermore, a mounting sleeve is movably connected to the outer surface of the left end of the first shaft segment, and arc grooves are provided at the top and bottom of the inner cavity of the mounting sleeve. A ball is movably connected to the outer surface of the left end of the first shaft segment, and the surface of the ball is movably connected to the inner cavity of the arc groove.

[0013] Furthermore, the top and bottom of the inner cavity of the installation sleeve are provided with limiting grooves, and the inner cavity of the limiting groove is movably connected with a roller.

[0014] The utility model provides a permanent magnet motor shaft, which has the following beneficial effects: through a locking mechanism provided at the right end of the second shaft section, a locking sleeve is adopted to cooperate with a plurality of limiting balls, so that the connecting piece suspended and screwed into the locking section can be limited, thereby achieving the purpose of locking and preventing loosening, and it is convenient to disassemble, and the limiting block is used to limit the position of the connecting piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a permanent magnet motor shaft described in the utility model.

[0016] Figure 2 For this utility model Figure 1 A partial enlarged schematic diagram of point B in the middle.

[0017] Figure 3 This is a cross-sectional view of the locking section of the utility model.

[0018] Figure 4 This is a schematic diagram of the connecting piece of the utility model.

[0019] Figure 5 For this utility model Figure 1 A partial enlarged schematic diagram in the middle.

[0020] In the figure: 1. first shaft section; 2. second shaft section; 3. connecting piece; 4. locking section; 5. internal thread; 6. spring; 7. locking sleeve; 8. limiting hole; 9. limiting ball; 10. limiting block; 11. limiting groove; 12. load-bearing groove; 13. external thread; 14. annular limiting groove; 15. mounting sleeve; 16. arc groove; 17. ball; 18. limiting groove; 19. roller. DETAILED DESCRIPTION

[0021] The utility model is described in detail below in conjunction with the accompanying drawings. Figure 1-5As shown: a permanent magnet motor shaft, including a first shaft section 1 and a second shaft section 2, the first shaft section 1 and the second shaft section 2 are fixedly connected by seamless welding, and the right end of the second shaft section 2 is connected to a connecting piece 3 through a locking mechanism; the locking mechanism includes a locking section 4, an internal thread 5, a spring 6, a locking sleeve 7, a plurality of limiting holes 8 and a plurality of limiting balls 9, the locking section 4 is located at the right end of the second shaft section 2, the internal thread 5 is tapped in the locking section 4, the spring 6 is movably sleeved on the left side of the outer surface of the locking section 4, the locking sleeve 7 is movably sleeved on the outside of the locking section 4, a plurality of limiting holes 8 are evenly opened on the right side of the outer surface of the locking section 4, and a plurality of limiting balls 9 are movably installed in the plurality of limiting holes 8; a limiting block 1 is installed at the left end of the locking section 4 0; a limiting groove 11 corresponding to the spring 6 is opened on the left side of the locking sleeve 7, and a bearing groove 12 corresponding to a plurality of limiting balls 9 is opened on the right side of the locking sleeve 7; an external thread 13 meshing with the internal thread 5 is tapped on the outer surface of the left end of the connecting piece 3, and an annular limiting groove 14 corresponding to a plurality of limiting balls 9 is opened on the outer surface of the left end of the connecting piece 3; a mounting sleeve 15 is movably connected to the outer surface of the left end of the first shaft section 1, and arc grooves 16 are opened on the top and bottom of the inner cavity of the mounting sleeve 15, and a ball 17 is movably connected to the outer surface of the left end of the first shaft section 1, and the surface of the ball 17 is movably connected to the inner cavity of the arc groove 16; a limiting groove 18 is opened on the top and bottom of the inner cavity of the mounting sleeve 15, and a roller 19 is movably connected to the inner cavity of the limiting groove 18.

[0022] The working principle of this embodiment is as follows: the outer surface of the left end of the first shaft section 1 is movably connected with a mounting sleeve 15, the top and bottom of the inner cavity of the mounting sleeve 15 are provided with arc grooves 16, the outer surface of the left end of the first shaft section 1 is movably connected with a ball 17, the surface of the ball 17 is movably connected with the inner cavity of the arc groove 16, the top and bottom of the inner cavity of the mounting sleeve 15 are provided with limit grooves 18, and the inner cavity of the limit groove 18 is movably connected with a roller 19, such as Figure 1 and Figure 5 As shown, this is the prior art, which enables the motor shaft to be installed on the permanent magnet motor through a high-stability connection structure, and the limit groove 18 and the roller 19 are used to reduce the friction coefficient between the mounting sleeve 15 and the first shaft section 1;

[0023] When locked: the locking section 4 is located at the right end of the second shaft section 2, the internal thread 5 is tapped in the locking section 4, the spring 6 is movably sleeved on the left side of the outer surface of the locking section 4, the locking sleeve 7 is movably sleeved on the outside of the locking section 4, a number of limiting holes 8 are evenly opened on the right side of the outer surface of the locking section 4, a number of limiting balls 9 are movably installed in the number of limiting holes 8, a limiting block 10 is installed at the left end of the locking section 4, a limiting block 10 is installed at the left end of the locking section 4, an external thread 13 meshing with the internal thread 5 is tapped on the outer surface of the left end of the connector 3, and an annular limiting groove 14 corresponding to the number of limiting balls 9 is opened on the outer surface of the left end of the connector 3, such as Figure 3 and Figure 4As shown, when the connector 3 is installed, first pull the locking sleeve 7 to the left. At this time, the limiting groove 11 compresses the spring 6, and the limiting balls 9 in the limiting holes 8 become loose and move into the bearing groove 12. The bearing groove 12 can be set to be closed to prevent the limiting balls 9 from falling off. Then, the operator screws the connector 3 into the locking section 4. The limiting block 10 is used to limit the position of the connector 3. Finally, loosen the locking sleeve 7, and the limiting balls 9 are reset and stuck in the annular limiting groove 14 of the connector 3, thereby achieving the purpose of locking and preventing loosening, and facilitating disassembly.

[0024] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the utility model. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the utility model and fall within the protection scope of the utility model.

Claims

1. A permanent magnet motor shaft, comprising a first shaft section (1) and a second shaft section (2), wherein the first shaft section (1) and the second shaft section (2) are fixedly connected by seamless welding, characterized in that: The right end of the second shaft section (2) is connected to the connecting member (3) through a locking mechanism; the locking mechanism comprises a locking section (4), an internal thread (5), a spring (6), a locking sleeve (7), a plurality of limiting holes (8) and a plurality of limiting balls (9); the locking section (4) is located at the right end of the second shaft section (2); the internal thread (5) is tapped in the locking section (4); the spring (6) is movably sleeved on the left side of the outer surface of the locking section (4); the locking sleeve (7) is movably sleeved on the outside of the locking section (4); a plurality of limiting holes (8) are evenly opened on the right side of the outer surface of the locking section (4); and a plurality of limiting balls (9) are movably installed in the plurality of limiting holes (8).

2. A permanent magnet motor shaft according to claim 1, characterized in that: A limiting block (10) is installed at the left end of the locking section (4).

3. A permanent magnet motor shaft according to claim 1, characterized in that: The locking sleeve (7) has a limiting groove (11) on the left side thereof corresponding to the spring (6), and the locking sleeve (7) has a bearing groove (12) on the right side thereof corresponding to a plurality of limiting balls (9).

4. A permanent magnet motor shaft according to claim 1, characterized in that: The outer surface of the left end of the connecting piece (3) is tapped with an external thread (13) that meshes with the internal thread (5), and the outer surface of the left end of the connecting piece (3) is opened with an annular limiting groove (14) corresponding to a plurality of limiting balls (9).

5. A permanent magnet motor shaft according to claim 1, characterized in that: The outer surface of the left end of the first shaft section (1) is movably connected to a mounting sleeve (15), the top and bottom of the inner cavity of the mounting sleeve (15) are both provided with arc-shaped grooves (16), and the outer surface of the left end of the first shaft section (1) is movably connected to a ball (17), and the surface of the ball (17) is movably connected to the inner cavity of the arc-shaped groove (16).

6. A permanent magnet motor shaft according to claim 5, characterized in that: The top and bottom of the inner cavity of the installation sleeve (15) are both provided with limiting grooves (18), and the inner cavity of the limiting grooves (18) is movably connected to a roller (19).

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