Magnetic steel baffle device of motor rotor

Abstract

The utility model relates to a motor rotor, in particular to a magnetic steel baffle device of a motor rotor, which comprises a motor rotor body and a plurality of magnetic steel bodies which are attached to the surface of the motor rotor body and are distributed in a circumferential array, and the inner walls of the magnetic steel bodies are fixedly connected with positioning strips. The upper end face of the motor rotor body is provided with positioning grooves for sliding connection of the positioning strips, the upper end of the motor rotor body is provided with a first baffle structure, the first baffle structure is located at the upper ends of the multiple magnetic steel bodies, and the upper end face of the motor rotor body is provided with multiple threaded holes used in cooperation with the first baffle structure. A second baffle plate structure is arranged in the first baffle plate structure, and the first baffle plate structure and the second baffle plate structure are matched for fixing the plurality of magnetic steel bodies. According to the utility model, the magnetic steel body can be installed on the surface of the motor rotor body more stably.

Description

A magnet baffle device for an electric motor rotor Technical Field

[0001] This utility model relates to an electric motor rotor, and more particularly to a magnetic baffle device for an electric motor rotor. Background Technology

[0002] The motor rotor refers to the rotating part of the motor. The function of the magnet baffle inside the motor is to limit the magnets installed inside the rotor, thereby preventing the magnets from falling off during rotation.

[0003] Existing motor rotors generally use only simple adhesive or slot fixation to fix the magnets. At high speeds or after long-term use, the adhesive is prone to aging and failure, or the slot fixation is not firm enough, causing the magnets to shift. Once the magnets shift, it will affect the magnetic field distribution of the motor, thereby reducing the motor's performance. Summary of the Invention

[0004] The purpose of this invention is to provide a magnet baffle device for a motor rotor, which enables the magnet body to be more stably mounted on the surface of the motor rotor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a magnet baffle device for a motor rotor is provided, comprising a motor rotor body and a plurality of magnet bodies attached to the surface of the motor rotor body and arranged in a circumferential array. A positioning strip is fixedly connected to the inner wall of the magnet body. A positioning groove for sliding connection of the positioning strip is opened on the upper end face of the motor rotor body. A first baffle structure is provided at the upper end of the motor rotor body, and the first baffle structure is located at the upper end of the plurality of magnet bodies. A plurality of threaded holes for cooperating with the first baffle structure are opened on the upper end face of the motor rotor body. A second baffle structure is provided inside the first baffle structure, and the first baffle structure and the second baffle structure cooperate to fix the plurality of magnet bodies.

[0006] Optionally, the end face shape of the positioning strip and the positioning groove is T-shaped.

[0007] Optionally, the first baffle structure includes a magnetic steel baffle, screws, and reserved holes. The upper end face of the magnetic steel baffle is provided with a plurality of reserved holes for screws to pass through. The number of reserved holes is the same as the number of threaded holes, and the plurality of screws are threadedly connected to the plurality of threaded holes respectively.

[0008] Optionally, the number of the second baffle structures is the same as the number of magnet bodies. The second baffle structure includes a baffle, a magnet bar, an elongated hole, a sliding plate, a nut, a threaded shaft, and a groove. The magnet baffle has multiple grooves inside, and a sliding plate is slidably connected inside each groove. A baffle is fixedly connected to the end of each sliding plate away from the magnet baffle. A magnet bar is fixedly connected to the side of each baffle and sliding plate. The magnet bars are evenly distributed around the circumference of the motor rotor body, and each magnet bar is used to press against multiple magnet bodies. A threaded shaft is fixedly connected to the upper end of each sliding plate, and a nut is threadedly connected to the circumferential surface of each threaded shaft. The upper end face of the magnet baffle has multiple elongated holes for the threaded shaft to pass through, and each elongated hole communicates with multiple grooves.

[0009] Optionally, the upper surface of the magnetic steel baffle is provided with multiple ventilation holes.

[0010] Optionally, the bottom end of the magnetic steel baffle is fixedly connected to multiple positioning shafts, and the upper end face of the motor rotor body is provided with multiple positioning holes for the positioning shafts to be inserted. The number of positioning shafts and positioning holes are the same, and their positions correspond one-to-one.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] With the cooperation of the threaded hole, the first baffle structure, and the second baffle structure, after the installation of the magnet body is completed, the upper end of the magnet body and the side of the magnet body away from the motor rotor body can be fixed and pressed respectively. Moreover, the magnet baffle assembly composed of the first baffle structure and the second baffle structure can be installed more stably on the outer ends of the motor rotor body and multiple magnet bodies, thereby making the connection between the magnet body and the motor rotor body more firm and avoiding separation and displacement of the motor rotor body from the magnet body during long-term rotation, which would lead to damage to the performance of the motor. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 is a top view of the structure of the motor rotor body after the magnet body is installed in this utility model.

[0016] Figure 3 is a schematic diagram of the first baffle structure and the second baffle structure in this utility model;

[0017] Figure 4 is a schematic diagram of the exploded structure of this utility model;

[0018] Figure 5 is an enlarged structural schematic diagram of point A in Figure 4 of this utility model.

[0019] In the diagram: 1. Motor rotor body; 2. Magnet body; 3. First baffle structure; 301. Magnet baffle; 302. Screw; 303. Reserved hole; 4. Second baffle structure; 401. Baffle; 402. Magnet baffle bar; 403. Long hole; 404. Sliding plate; 405. Nut; 406. Threaded shaft; 407. Slide groove; 5. Vent hole; 6. Positioning hole; 7. Positioning shaft; 8. Positioning bar; 9. Positioning groove; 10. Threaded hole. Detailed Implementation

[0020] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Please refer to Figures 1-5 for the following description of the embodiments of this utility model. A magnet baffle device for a motor rotor includes a motor rotor body 1 and a plurality of magnet bodies 2 that are attached to the surface of the motor rotor body 1 and arranged in a circumferential array. A positioning strip 8 is fixedly connected to the inner wall of the magnet body 2. A positioning groove 9 for sliding connection of the positioning strip 8 is opened on the upper end face of the motor rotor body 1. A first baffle structure 3 is provided at the upper end of the motor rotor body 1, and the first baffle structure 3 is located at the upper end of the plurality of magnet bodies 2. A plurality of threaded holes 10 are opened on the upper end face of the motor rotor body 1 to cooperate with the first baffle structure 3. A second baffle structure 4 is provided inside the first baffle structure 3, and the first baffle structure 3 and the second baffle structure 4 cooperate to fix the plurality of magnet bodies 2. During operation, the positioning strip 8 and positioning groove 9 work together to complete the initial installation of the magnet body 2, making it fit against the circumference of the motor rotor body 1. Then, the first baffle structure 3 is used to fit onto the motor rotor body 1, pressing down on the upper ends of multiple magnet bodies 2 and controlling the first baffle structure 3 to fix it to the motor rotor body 1. This completes the initial fixation of the magnet body 2, making it difficult for multiple magnet bodies 2 to detach or shift from the upper end of the motor rotor body 1. Then, the second baffle structure 4 is controlled to squeeze the side of the magnet body 2 away from the motor rotor body 1, making the magnet body 2 fit more tightly with the motor rotor body 1. By fixing the magnet body 2 in two positions at the same time, the connection between the magnet body 2 and the motor rotor body 1 can be made more secure, and it is not easy for the magnet body 2 to shift or detach with the rotation of the motor rotor.

[0022] Compared with the prior art, this utility model, with the cooperation of the threaded hole 10, the first baffle structure 3 and the second baffle structure 4, after the installation of the magnet body 2 is completed, can fix and press the upper end of the magnet body 2 and the side of the magnet body 2 away from the motor rotor body 1 respectively. Moreover, the magnet baffle assembly composed of the first baffle structure 3 and the second baffle structure 4 can be installed more stably on the outer ends of the motor rotor body 1 and multiple magnet bodies 2, so that the magnet body 2 is more firmly connected to the motor rotor body 1, and the motor rotor body 1 is prevented from separating from the magnet body 2 and shifting during long-term rotation, which would damage the performance of the motor.

[0023] In another embodiment of this utility model, please refer to Figures 2 and 4. The end face shapes of the positioning strip 8 and the positioning groove 9 are both T-shaped. During operation, the T-shaped positioning strip 8 and positioning groove 9 not only facilitate the installation of the magnet body 2, but also eliminate the need for operators to continuously support the magnet body 2 before it is fixed. This makes it easier to subsequently install the magnet baffle assembly composed of the first baffle structure 3 and the second baffle structure 4.

[0024] In another embodiment of this utility model, please refer to Figures 1, 3 and 4. The first baffle structure 3 includes a magnetic steel baffle 301, screws 302 and reserved holes 303. The upper end face of the magnetic steel baffle 301 is provided with a plurality of reserved holes 303 for the screws 302 to pass through. The number of reserved holes 303 is the same as the number of threaded holes 10. The plurality of screws 302 are respectively threadedly connected to the plurality of threaded holes 10. During operation, when installing the magnet baffle 301, it is necessary to place the magnet baffle 301 on the motor rotor body 1 and press it on the upper ends of multiple magnet bodies 2. At this time, it is necessary to ensure that the multiple reserved holes 303 are respectively located at the upper ends of multiple threaded holes 10. Then, screws 302 can be installed along the reserved holes 303. The screws 302 are gradually inserted into the threaded holes 10. With the cooperation of the screws 302 and the threaded holes 10, the magnet baffle 301 can be stably installed on the motor rotor body 1 and stably pressed on the upper ends of multiple magnet bodies 2, so that the multiple magnet bodies 2 are stably located around the motor rotor body 1 and are not easy to move.

[0025] In another embodiment of this utility model, referring to Figures 1, 3 to 5, the number of second baffle structures 4 is the same as the number of magnet bodies 2. The second baffle structure 4 includes a baffle 401, a magnet baffle 402, an elongated hole 403, a sliding plate 404, a nut 405, a threaded shaft 406, and a groove 407. Multiple grooves 407 are provided inside the magnet baffle 301, and sliding plates 404 are slidably connected inside each of the multiple grooves 407. A baffle 401 is fixedly connected to one end of each sliding plate 404 away from the magnet baffle 301. On the same side as the sliding plate 404, the plate 401 is fixedly connected with a magnetic steel baffle 402. Multiple magnetic steel baffles 402 are evenly distributed around the motor rotor body 1, and the multiple magnetic steel baffles 402 are used to press multiple magnetic steel bodies 2 respectively. The upper end of the multiple sliding plates 404 is fixedly connected with a threaded shaft 406, and the circumferential surface of the multiple threaded shafts 406 is threaded with a nut 405. The upper end surface of the magnetic steel baffle 301 is provided with multiple elongated holes 403 for the threaded shafts 406 to pass through, and the multiple elongated holes 403 are respectively connected to multiple sliding grooves 407. During operation, loosening the nut 405 allows the baffle 401 to move along the elongated hole 403. The baffle 401 then moves the sliding plate 404, the threaded shaft 406, and the magnetic steel baffle 402 until the magnetic steel baffle 402 is tightly fitted to the magnetic steel body 2. After that, the nut 405 is tightened again, pressing it firmly against the upper end of the magnetic steel baffle 301. At this point, the magnetic steel baffle 402 can steadily press against the magnetic steel body 2, making the magnetic steel body 2 fit more tightly with the motor rotor body 1, preventing it from shifting or separating.

[0026] In another embodiment of this utility model, please refer to Figures 1, 3 and 4. The upper end face of the magnetic steel baffle 301 is provided with a plurality of ventilation holes 5. During operation, the heat generated by the motor rotor body 1 can be dissipated through the plurality of ventilation holes 5, thereby reducing the accumulation of heat between the magnetic steel baffle 301 and the motor rotor body 1.

[0027] In another embodiment of this utility model, please refer to Figures 2 to 4. The bottom end of the magnetic baffle 301 is fixedly connected to multiple positioning shafts 7. The upper surface of the motor rotor body 1 has multiple positioning holes 6 for the insertion of the positioning shafts 7. The number of positioning shafts 7 and positioning holes 6 are equal, and their positions correspond one-to-one. During operation, the positioning shafts 7 and positioning holes 6 work together to quickly position the magnetic baffle 301, allowing it to be installed more accurately on the motor rotor body 1.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A magnet baffle device for an electric motor rotor, comprising an electric motor rotor body (1) and a plurality of magnet bodies (2) attached to the surface of the electric motor rotor body (1) and arranged in a circumferential array, characterized in that: The inner wall of the magnet body (2) is fixedly connected with a positioning strip (8). The upper end face of the motor rotor body (1) is provided with a positioning groove (9) for the positioning strip (8) to slide. The upper end of the motor rotor body (1) is provided with a first baffle structure (3), and the first baffle structure (3) is located at the upper end of multiple magnet bodies (2). The upper end face of the motor rotor body (1) is provided with multiple threaded holes (10) that cooperate with the first baffle structure (3). The interior of the first baffle structure (3) is provided with a second baffle structure (4), and the first baffle structure (3) and the second baffle structure (4) cooperate to fix multiple magnet bodies (2).

2. A magnetic steel baffle device for a motor rotor as set forth in claim 1, characterized in that: The end face shapes of the positioning strip (8) and the positioning groove (9) are both T-shaped.

3. A magnetic steel baffle device for a motor rotor as recited in claim 1, wherein: The first baffle structure (3) includes a magnetic steel baffle (301), screws (302) and reserved holes (303). The upper end face of the magnetic steel baffle (301) is provided with a plurality of reserved holes (303) for the screws (302) to pass through. The number of reserved holes (303) is the same as the number of threaded holes (10). The plurality of screws (302) are respectively threadedly connected to the plurality of threaded holes (10).

4. A magnetic steel damper device for a motor rotor as set forth in claim 3, wherein: The number of the second baffle structure (4) is the same as the number of the magnet body (2). The second baffle structure (4) includes a baffle (401), a magnet baffle (402), an elongated hole (403), a sliding plate (404), a nut (405), a threaded shaft (406), and a groove (407). The magnet baffle (301) has multiple grooves (407) inside. Each groove (407) is slidably connected to a sliding plate (404). Each sliding plate (404) is fixedly connected to a baffle (401) at one end away from the magnet baffle (301). The multiple baffles (401) and the sliding plate are slidably connected to each other. On the same side of the plate (404), a magnetic steel baffle (402) is fixedly connected. Multiple magnetic steel baffles (402) are evenly distributed around the motor rotor body (1). Multiple magnetic steel baffles (402) are used to squeeze multiple magnetic steel bodies (2). The upper end of multiple sliding plates (404) is fixedly connected to a threaded shaft (406). Nuts (405) are threaded onto the circumferential surface of multiple threaded shafts (406). Multiple long holes (403) for the threaded shafts (406) to pass through are opened on the upper end surface of the magnetic steel baffle (301). Multiple long holes (403) are connected to multiple sliding grooves (407).

5. A magnetic steel baffle device for a motor rotor as recited in claim 3, wherein: The upper surface of the magnetic steel baffle (301) is provided with multiple ventilation holes (5).

6. A magnetic steel baffle device for a motor rotor as recited in claim 3, wherein: The bottom end of the magnetic steel baffle (301) is fixedly connected with multiple positioning shafts (7). The upper end face of the motor rotor body (1) is provided with multiple positioning holes (6) for the positioning shafts (7) to be inserted. The number of positioning shafts (7) and positioning holes (6) are the same, and their positions correspond one-to-one.

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