Low-inertia integrated rotor structure of permanent magnet motor

Abstract

The utility model discloses a low-inertia integrated rotor structure of a permanent magnet motor, which comprises a rotor iron core and a rotor body, and the rotor body is fixedly mounted on the inner side of the rotor iron core. The middle position of the rotor body is connected with one end of the first water bag through an oil conveying pipe, the left side position of the rotor body is connected with the output end of the permanent magnet motor through an anti-falling mechanism, and the rotor body can be prevented from falling off from the output end of the permanent magnet motor. According to the low-inertia integrated rotor structure of the permanent magnet motor, the limiting mechanism and the attaching mechanism are arranged, hydraulic oil in a first water bag can be conveyed into a second water bag and a third water bag by rotating a rotating rod, and at the moment, the hydraulic oil can be conveyed; and the limiting mechanism and the attaching mechanism can be attached to the outer side of the mounting bolt and the inner connecting part of the mounting through hole, so that the rotor iron core can be prevented from loosening in the long-term rotation work.

Description

Technical Field

[0001] The utility model relates to the technical field related to permanent magnet motors, in particular to a low-inertia integrated rotor structure of a permanent magnet motor. Background Art

[0002] At present, the rotor structure of a large torque motor usually uses a connecting plate to connect the rotating shaft and the rotor core, and usually uses a front and rear connecting plate welded to the rotating shaft and the rotor core. This form of rotor structure is complex, inconvenient to assemble, has high mechanical structure stress, and low degree of rotor structure integration. Therefore, how to optimize the rotor structure suitable for large torque motors will become a key research issue in the motor design process. There are many types of existing permanent magnet motor low inertia integrated rotor structures, such as:

[0003] The publication number is CN209056991U and the publication number is "A low-inertia integrated rotor structure for a permanent magnet motor". The rotor mechanism is ensured by the shaft and the connecting plate under the requirement of strength. The shaft adopts a hollowed-out rod and the outer circumference is provided with a rounded annular groove. The connecting plate is provided with evenly spaced through holes. The form of the hollow rod, the annular groove and the evenly spaced through holes reduces the weight of the material as much as possible, and can greatly reduce the inertia of the rotor as a whole. At the same time, the outer end of a connecting plate is welded to the rotor core and fixed to the shaft with bolts, so that the overall structure of the rotor is simple and the degree of integration is high. The entire rotor can be easily assembled, which is beneficial to the assembly accuracy of large motors and is suitable for large torque motors. When the above-mentioned device is working, it is installed on the rotor core by using bolts and other accessories. When it rotates at high speed for a long time, the bolts will loosen, and it is more likely to cause damage to the rotor. In addition, when the rotor is installed on the permanent magnet motor, it will also loosen.

[0004] Therefore, we propose a low-inertia integrated rotor structure for a permanent magnet motor to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a low-inertia integrated rotor structure for a permanent magnet motor, so as to solve the problem that the low-inertia integrated rotor device of the permanent magnet motor currently on the market is installed on the rotor core by using accessories such as bolts during operation, and the bolts may become loose during long-term high-speed rotation, which is more likely to cause damage to the rotor. In addition, when the rotor is installed in the permanent magnet motor, there will also be a problem of looseness.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-inertia integrated rotor structure of a permanent magnet motor, comprising a rotor core and a rotor body, wherein the rotor body is fixedly installed at the inner side of the rotor core;

[0007] Also includes:

[0008] The outer side of the rotor core is connected to a rotating rod with a bearing, and one end of the rotating rod is connected to the outer side of the rotor core with a bearing, and the middle end of the rotating rod extending into the inner side of the rotor core is connected to a limiting mechanism, which can realize the fitting and limiting treatment of the mounting bolts threadedly connected to the inner side of the rotor core, and the bottom end of the rotating rod extending into the inner side of the rotor core is connected to a fitting mechanism, which facilitates the limiting treatment of the connection inside the mounting through hole opened on the outer side of the rotor core;

[0009] The middle part of the rotor body is connected to one end of the first water bag through an oil delivery pipe, and the left side of the rotor body is connected to the output end of the permanent magnet motor through an anti-drop mechanism to prevent the rotor body from falling off from the output end of the permanent magnet motor.

[0010] Preferably, the limiting mechanism includes a movable sleeve threadedly connected to the middle position of the rotating rod, and limiting blocks are fixed on both sides of the movable sleeve, the outer side of the limiting block fits inside the slide groove, and a first water bag is fitted below the slide groove, one end of the first water bag is connected to the second water bag through a group of oil pipes, and the outer side of the second water bag fits on the outer side of the mounting bolt.

[0011] Preferably, elastic rubber is arranged between the first water bag, the second water bag and the third water bag, and the capacity of the hydraulic oil inside the first water bag is greater than that of the second water bag and the third water bag, so as to facilitate the transportation of the hydraulic oil inside the first water bag to the inside of the second water bag and the third water bag.

[0012] Preferably, the slide groove is opened inside the rotor body, and the limit block forms a sliding structure with the inside of the rotor core through the slide groove, so that the limit block can slide stably inside the slide groove.

[0013] Preferably, the bonding mechanism includes a positioning block threadedly connected to the bottom position of the rotating rod, and a guide rod is fixed to the top outer position of the positioning block, and the outer side of the guide rod extends into the inner position of the accommodating groove, so that stable bonding processing can be performed.

[0014] Preferably, the accommodating groove is provided at an inner position of the rotor core, and the bottom position of the positioning block extends into the bottom position of the mounting through hole, so that the positioning block can perform docking processing on the inner connection of the mounting through hole.

[0015] Preferably, the anti-falling mechanism includes a third water bag connected to one end of the oil pipeline, the outer side of the third water bag is fitted on the outer side of the slider, a fixed rack is fixed at the other end of the slider, one end of the fixed rack is connected to the inside of the rotor body through a reset spring, the end of the fixed rack is fitted in a guide groove opened inside the rotor body, the outer side of the fixed rack is meshedly connected with a rotating gear, the center position of the rotating gear is keyed with a threaded rod, the top outer side of the threaded rod is threadedly connected to the bottom end of the cross plate, a moving rod is fixed at the top of the cross plate, a fitting block is fixed at the top of the moving rod, sliding blocks are fixed on the left and right sides of the fitting block, which can prevent the output end of the permanent magnet motor from falling off from the rotor body.

[0016] Preferably, the outer side of the sliding block fits in a groove opened inside the rotor body, and the cross plate, moving rod, fitting block and sliding block are integrated. The cross plate has four groups distributed at equal angles with respect to the center position of the rotor body, so that the cross plate, moving rod, fitting block and sliding block can move synchronously.

[0017] Preferably, the middle position bearing of the threaded rod is connected to the inner position of the rotor body, and the fixed rack forms an elastic sliding structure with the inner part of the rotor body through a reset spring, so that the threaded rod can rotate stably inside the rotor body.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The low-inertia integrated rotor structure of the permanent magnet motor is provided with a limit mechanism and a fitting mechanism. By rotating the rotating rod, the threaded movable sleeve and the positioning block can be moved, so that the hydraulic oil inside the first water bag can be transported to the inside of the second water bag and the third water bag. At this time, the hydraulic oil can be transported, and the limit mechanism and the fitting mechanism can fit with the outside of the mounting bolt and the internal connection of the mounting through hole, so as to prevent the rotor core from loosening during long-term rotation.

[0020] 2. The low-inertia integrated rotor structure of the permanent magnet motor is provided with an anti-falling mechanism. The first water bag is conveyed to cause the slider and the fixed rack to move, and the rotating gear is rotated through the fixed rack. At this time, the rotating gear will drive the threaded rod to rotate, and the cross plate, moving rod, fitting block and sliding block are moved, thereby being stuck in the output end of the permanent magnet motor, which can effectively prevent the rotor body and the permanent magnet motor from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0022] Figure 2 This is a left-side structural schematic diagram of the utility model;

[0023] Figure 3 This is a schematic diagram of the main cross-sectional structure of the positioning block of the utility model;

[0024] Figure 4 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0025] Figure 5 This is a schematic diagram of the main cross-sectional structure of the rotor body of the utility model;

[0026] Figure 6 For this utility model Figure 5 The enlarged structural diagram at B in the middle;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the slider of the utility model.

[0028] In the figure: 1. rotor core; 2. rotor body; 3. rotating rod; 4. moving sleeve; 5. limiting block; 6. slide groove; 7. first water bag; 8. oil pipeline; 9. positioning block; 10. guide rod; 11. receiving groove; 12. mounting through hole; 13. second water bag; 14. mounting bolt; 15. third water bag; 16. slider; 17. fixed rack; 18. return spring; 19. guide groove; 20. rotating gear; 21. threaded rod; 22. cross plate; 23. moving rod; 24. fitting block; 25. sliding block. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-Figure 7 The utility model provides a technical solution: a low-inertia integrated rotor structure of a permanent magnet motor, comprising a rotor core 1 and a rotor body 2, wherein the rotor body 2 is fixedly installed at the inner side of the rotor core 1;

[0031] Also includes:

[0032] The outer side of the rotor core 1 is connected to a rotating rod 3 with a bearing, and one end of the rotating rod 3 is connected to the outer side of the rotor core 1 with a bearing, and the middle end of the rotating rod 3 extending into the inner side of the rotor core 1 is connected to a limiting mechanism, which can realize the fitting and limiting treatment of the mounting bolts 14 threadedly connected to the inner side of the rotor core 1, and the bottom end of the rotating rod 3 extending into the inner side of the rotor core 1 is connected to a fitting mechanism, which is convenient for the limiting treatment of the connection inside the mounting through hole 12 opened on the outer side of the rotor core 1; the limiting mechanism includes a movable sleeve 4 threadedly connected to the middle part of the rotating rod 3, and the two sides of the movable sleeve 4 are fixed with limited positions. The outer side of the limit block 5 is fitted in the inside of the slide slot 6, which is opened in the inside of the rotor body 2, and the limit block 5 forms a sliding structure with the inside of the rotor core 1 through the slide slot 6; the first water bag 7 is fitted in the lower position of the slide slot 6, and the first water bag 7, the second water bag 13 and the third water bag 15 are all set with elastic rubber, and the capacity of the hydraulic oil in the first water bag 7 is greater than the capacity of the second water bag 13 and the third water bag 15; one end of the first water bag 7 is connected to the second water bag 13 through a group of oil delivery pipes 8, and the outer side of the second water bag 13 is fitted on the outer side of the mounting bolt 14. The fitting mechanism includes a positioning block 9 threadedly connected to the bottom position of the rotating rod 3, and a guide rod 10 is fixed to the top outer position of the positioning block 9, and the outer side of the guide rod 10 extends into the inner position of the receiving groove 11; the receiving groove 11 is opened in the inner position of the rotor core 1, and the bottom position of the positioning block 9 extends into the bottom position of the mounting through hole 12.

[0033] Combined with Figure 1 -Attached Figure 4 First, when the rotor core 1 and the rotor body 2 are installed, the rotating rod 3 can be rotated to make the rotating rod 3 rotate inside the rotor core 1. At this time, when the rotating rod 3 rotates, the rotating rod 3 can drive the moving sleeve 4 and the limit block 5 to move inside the slide groove 6. At this time, the bottom position of the moving sleeve 4 will squeeze the inside of the first water bag 7 to slide, and then the hydraulic oil in the first water bag 7 will be transported to the inside of the second water bag 13 and the third water bag 15. Then, when the hydraulic oil is transported to the inside of the second water bag 13 through the oil pipe 8, at this time, the second The water bag 13 will expand, causing the outer side of the second water bag 13 to fit against the outer side of the mounting bolt 14. At this time, the mounting bolt 14 can be limited. When the rotating rod 3 continues to rotate, the rotating rod 3 will drive the threaded connection positioning block 9 to move, so that the guide rod 10 fixedly connected at both sides of the positioning block 9 will slide inside the accommodating groove 11. At this time, the outer side of the positioning block 9 will move to the inside of the mounting through hole 12. The internal connection of the mounting through hole 12 can be limited, which can prevent the internal bolts of the rotor core 1 from loosening.

[0034] The middle position of the rotor body 2 is connected to one end of the first water bag 7 through the oil pipeline 8, and the left side of the rotor body 2 is connected to the output end of the permanent magnet motor through an anti-falling mechanism, which can prevent the rotor body 2 from falling off from the output end of the permanent magnet motor; the anti-falling mechanism includes a third water bag 15 connected to one end of the oil pipeline 8, the outer side of the third water bag 15 is attached to the outer side of the slider 16, and the other end of the slider 16 is fixed with a fixed rack 17, one end of the fixed rack 17 is connected to the inside of the rotor body 2 through a reset spring 18, and the end of the fixed rack 17 is attached to the guide groove 19 opened in the rotor body 2, and the outer side of the fixed rack 17 is meshed with a rotating gear 20, and the center of the rotating gear 20 is located at the center of the rotating gear 20. A threaded rod 21 is keyed, and the middle position of the threaded rod 21 is bearing-connected to the internal position of the rotor body 2, and the fixed rack 17 forms an elastic sliding structure with the inside of the rotor body 2 through the reset spring 18; the top outer position of the threaded rod 21 is threadedly connected to the bottom of the cross plate 22, and a moving rod 23 is fixed to the top position of the cross plate 22, and a fitting block 24 is fixed to the top position of the moving rod 23, and sliding blocks 25 are fixed to the left and right sides of the fitting block 24; the outer side of the sliding block 25 fits in the groove opened in the rotor body 2, and the cross plate 22, the moving rod 23, the fitting block 24 and the sliding block 25 are integrated, and the cross plate 22 has four groups of equal angles distributed about the center position of the rotor body 2.

[0035] Combined with Figure 1 and attached Figure 5 -Attached Figure 7 Since one end of the rotor body 2 extends into the output end of the permanent magnet motor, the hydraulic oil will be transported to the third water bag 15 inside the rotor body 2. At this time, the third water bag 15 will push the slider 16 to move inside the rotor body 2, causing the slider 16 to drive the four sets of fixed racks 17 to move, causing one end of the fixed rack 17 to slide stably inside the guide groove 19 through the return spring 18. In addition, the fixed rack 17 will drive the rotating gear 20 to rotate, so that the rotating gear 20 will mobilize the threaded rod 21 to rotate inside the rotor body 2. In addition, the cross plate 22 threadedly connected to the top position of the threaded rod 21 will drive the moving rod 23 to move. At this time, the moving rod 23 will drive the fitting block 24 and the sliding block 25 to slide inside the rotor body 2, so that the top of the fitting block 24 fits on the output connection end of the permanent magnet motor, which can prevent the rotor body 2 from falling off from the output end.

[0036] Working principle: When using the low inertia integrated rotor structure of the permanent magnet motor, combined with the attached Figure 1 -Attached Figure 7First, when the rotor core 1 and the rotor body 2 are installed, the rotating rod 3 can be rotated to make the rotating rod 3 rotate inside the rotor core 1. At this time, when the rotating rod 3 rotates, the rotating rod 3 can drive the movable sleeve 4 and the limit block 5 to move inside the slide groove 6, and the second water bag 13 will expand, causing the outer side of the second water bag 13 to fit the outer side of the mounting bolt 14. At this time, the mounting bolt 14 can be limited, so that the guide rods 10 fixedly connected to the positions on both sides of the positioning block 9 will slide inside the accommodating groove 11. At this time, the outer side of the positioning block 9 will move to the inside of the mounting through hole 12, and the mounting through hole 12 can be The internal connection is limited, which can prevent the internal bolts of the rotor core 1 from loosening; since one end of the rotor body 2 extends into the output end of the permanent magnet motor, the hydraulic oil will be transported to the third water bag 15 inside the rotor body 2, and the fixed rack 17 will drive the rotating gear 20 to rotate, so that the rotating gear 20 will mobilize the threaded rod 21 to rotate inside the rotor body 2, and the cross plate 22 threadedly connected to the top position of the threaded rod 21 will drive the moving rod 23 to move, so that the top of the fitting block 24 fits on the output connection end of the permanent magnet motor, which can prevent the rotor body 2 from falling off from the output end, thereby completing a series of tasks.

[0037] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the utility model, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-inertia integrated rotor structure for a permanent magnet motor, comprising a rotor core (1) and a rotor body (2), wherein the rotor body (2) is fixedly mounted on the inner side of the rotor core (1); It is characterized in that Also includes: The outer side of the rotor core (1) is connected to a rotating rod (3) by a bearing, and one end of the rotating rod (3) is connected to the outer side of the rotor core (1) by a bearing, and the middle end of the rotating rod (3) extending into the inner side of the rotor core (1) is connected to a limiting mechanism, so that the mounting bolt (14) threadedly connected to the inner side of the rotor core (1) can be fitted and limited, and the bottom end of the rotating rod (3) extending into the inner side of the rotor core (1) is connected to a fitting mechanism, so that the connection inside the mounting through hole (12) opened on the outer side of the rotor core (1) can be conveniently limited; The middle position of the rotor body (2) is connected to one end of the first water bag (7) via an oil delivery pipe (8), and the left side of the rotor body (2) is connected to the output end of the permanent magnet motor via an anti-drop mechanism, thereby preventing the rotor body (2) from dropping off from the output end of the permanent magnet motor.

2. A low inertia integrated rotor structure for a permanent magnet motor according to claim 1, characterized in that: The limiting mechanism comprises a movable sleeve (4) threadedly connected to the middle position of the rotating rod (3), and limiting blocks (5) are fixed at both sides of the movable sleeve (4), the outer side of the limiting block (5) is fitted in the interior of the slide groove (6), and a first water bag (7) is fitted under the slide groove (6), one end of the first water bag (7) is connected to the second water bag (13) through a group of oil delivery pipes (8), and the outer side of the second water bag (13) is fitted in the outer side of the mounting bolt (14).

3. A low inertia integrated rotor structure for a permanent magnet motor according to claim 2, characterized in that: Elastic rubber is arranged between the first water bag (7), the second water bag (13) and the third water bag (15), and the capacity of the hydraulic oil inside the first water bag (7) is greater than the capacity of the second water bag (13) and the third water bag (15).

4. The low inertia integrated rotor structure of a permanent magnet motor according to claim 2, characterized in that: The slide groove (6) is opened inside the rotor body (2), and the limit block (5) forms a sliding structure with the inside of the rotor core (1) through the slide groove (6).

5. The low inertia integrated rotor structure of a permanent magnet motor according to claim 1, characterized in that: The fitting mechanism comprises a positioning block (9) threadedly connected to the bottom of the rotating rod (3), and a guide rod (10) is fixed to the top outer side of the positioning block (9), and the outer side of the guide rod (10) extends into the inner position of the receiving groove (11).

6. A low inertia integrated rotor structure for a permanent magnet motor according to claim 5, characterized in that: The accommodating groove (11) is opened at an inner position of the rotor core (1), and the bottom position of the positioning block (9) extends into the bottom position of the mounting through hole (12).

7. The low inertia integrated rotor structure of a permanent magnet motor according to claim 1, characterized in that: The anti-falling mechanism comprises a third water bag (15) connected to one end of the oil delivery pipe (8), the outer side of the third water bag (15) is fitted on the outer side of the slider (16), the other end of the slider (16) is fixed with a fixed rack (17), one end of the fixed rack (17) is connected to the inside of the rotor body (2) through a return spring (18), the end of the fixed rack (17) is fitted in a guide groove (19) provided in the inside of the rotor body (2), and the The outer side of the fixed rack (17) is meshedly connected with a rotating gear (20), the center position of the rotating gear (20) is key-connected with a threaded rod (21), the top outer position of the threaded rod (21) is threadedly connected to the bottom of the horizontal plate (22), the top position of the horizontal plate (22) is fixed with a moving rod (23), the top position of the moving rod (23) is fixed with a fitting block (24), and the left and right sides of the fitting block (24) are fixed with sliding blocks (25).

8. The low inertia integrated rotor structure of a permanent magnet motor according to claim 7, characterized in that: The outer side of the sliding block (25) fits into a groove provided inside the rotor body (2); the transverse plate (22), the moving rod (23), the fitting block (24) and the sliding block (25) are integrated; and the transverse plate (22) has four groups of equal angles distributed with respect to the center position of the rotor body (2).

9. The low inertia integrated rotor structure of a permanent magnet motor according to claim 7, characterized in that: The middle position of the threaded rod (21) is bearing-connected to the inner position of the rotor body (2), and the fixed rack (17) forms an elastic sliding structure with the inner part of the rotor body (2) via a return spring (18).

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