Rotor assembly of hollow shaft brake motor

Abstract

The utility model provides a rotor assembly of a hollow shaft brake motor, and relates to the technical field of brake motors. The rotor assembly comprises a hollow shaft, a plastic end plate, a plurality of magnetic steels and a rotor sheath. Wherein a protruding ring sleeve is arranged on the side face of the hollow shaft, and a first positioning structure is arranged on the end face of one side of the protruding ring sleeve; a through hole is formed in the middle of the plastic end plate, a second positioning structure and a plurality of magnetic steel pasting surfaces are arranged on the plane of one side of the plastic end plate, the plastic end plate is arranged on the hollow shaft in a sleeving mode through the through hole, and the first positioning structure is matched with the second positioning structure; the plurality of magnetic steels are respectively pasted on the plurality of magnetic steel pasting surfaces, and the plurality of magnetic steels surround the side surface of the protruding ring sleeve; and the rotor sheath sleeves and is fixed on the hollow shaft at high temperature, and covers the plurality of magnetic steels. The rotor assembly is low in manufacturing cost, low in process complexity and not easy to crush the magnetic steel.

Description

Technical Field

[0001] This disclosure relates to the field of brake motor technology, and more particularly to a rotor assembly of a hollow shaft brake motor. Background Technology

[0002] In the field of brake motor technology, most brake motors adopt a hollow shaft structure. By designing a contour on the surface of the hollow shaft, magnets are glued to the contour structure and then cured, thereby achieving the purpose of precisely fixing the position of the magnets.

[0003] Furthermore, during the high-speed rotation of the brake motor, the rotor is subjected to magnetic pull, centrifugal force, and its own gravity. Therefore, a protective sleeve needs to be added to the outer ring of the magnets to prevent them from detaching. In related technologies, after the magnets are attached to the hollow shaft, an insulating end plate is added to both the upper and lower end faces of the magnets. One end of the rotor sleeve is closed off on one insulating end plate, and the other end is riveted to the other insulating end plate.

[0004] However, the presence of the contour structure on the hollow shaft makes the processing cost of the hollow shaft high, which in turn leads to the high cost of the rotor assembly. Furthermore, the method of setting the insulating end plate makes the rotor assembly process complicated, and the magnets are easily cracked during the riveting process of the rotor sheath. Utility Model Content

[0005] This disclosure provides a rotor assembly for a hollow shaft brake motor, which at least to some extent overcomes the problems of high cost, complicated process, and easy cracking of magnets in related technologies.

[0006] According to one aspect of this disclosure, a rotor assembly for a hollow shaft brake motor is provided, comprising: a hollow shaft, a plastic end plate, a plurality of magnets, and a rotor sheath; wherein, a protruding ring is provided on the side of the hollow shaft, and a first positioning structure is provided on one end face of the protruding ring; the middle portion of the plastic end plate is provided with a through hole, and a second positioning structure and a plurality of magnet bonding surfaces are provided on one side plane; the plastic end plate is sleeved on the hollow shaft through the through hole, and the first positioning structure cooperates with the second positioning structure; the plurality of magnets are respectively bonded to the plurality of magnet bonding surfaces, and the plurality of magnets surround the side of the protruding ring; the rotor sheath is sleeved on and fixed at high temperature on the hollow shaft, and covers the plurality of magnets.

[0007] By adding plastic end plates to the rotor assembly and mounting multiple magnets on these end plates, the need for a contour structure on the hollow shaft can be avoided, thus reducing the manufacturing cost of the rotor assembly. The rotor sheath is then fixed to the hollow shaft at high temperature, which not only secures the magnets but also eliminates the need for an insulating protective plate, reducing the complexity of the rotor assembly process and preventing the rotor sheath from being riveted to the insulating protective plate, thereby avoiding the possibility of the magnets being crushed.

[0008] Furthermore, reducing the number of insulating guard plates can also lower the manufacturing cost of the rotor assembly.

[0009] Furthermore, fixing the magnets with glue and curing the rotor sleeves outside the magnets with high temperature is safer and more reliable than riveting the rotor sleeves to fix the magnets.

[0010] In some embodiments, the first positioning structure is a plurality of small holes; the second positioning structure is a plurality of protrusions that cooperate with the plurality of small holes.

[0011] In some embodiments, the first positioning structure is a plurality of protruding posts; the second positioning structure is a plurality of small holes that cooperate with the plurality of protruding posts.

[0012] In some embodiments, the plastic end plate is uniformly provided with a plurality of protrusions, and the surface of each protrusion is a magnetic bonding surface.

[0013] By setting multiple bosses, it is easier to better fit the magnet.

[0014] In some embodiments, a plurality of position reference posts are uniformly arranged on the plastic end plate, and a protrusion is provided between two adjacent position reference posts, and the gap between the protrusion and the protrusion forms an overflow groove.

[0015] By setting up this glue overflow groove, it is possible to avoid the glue overflow affecting the position of the magnets and the overall fit of the various components in the rotor assembly.

[0016] In some embodiments, the rotor sheath includes a thin ring and a columnar wall plate, one end of the columnar wall plate coinciding with the outer ring of the thin ring, and the columnar wall plate covering the plurality of magnets.

[0017] By setting a thin ring, the rotor sheath can be better fitted to the hollow shaft and magnets, thereby better fixing the position of the magnets. Attached Figure Description

[0018] Figure 1 A schematic diagram of a rotor assembly according to an embodiment of the present disclosure is shown;

[0019] Figure 2 A schematic diagram of a hollow shaft according to an embodiment of the present disclosure is shown;

[0020] Figure 3 A schematic diagram of a plastic end plate according to an embodiment of the present disclosure is shown;

[0021] Figure 4 This diagram illustrates a magnet being attached to a plastic end plate according to an embodiment of the present disclosure.

[0022] Figure 5 This diagram illustrates a plastic end plate disposed on a hollow shaft according to an embodiment of the present disclosure.

[0023] Figure 6 A schematic diagram of a rotor sheath according to an embodiment of the present disclosure is shown. Detailed Implementation

[0024] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0025] The specific implementation methods of the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0026] like Figures 1-6 The rotor assembly of the hollow shaft brake motor shown in the embodiment of this application may include: a hollow shaft 1, a plastic end plate 2, a plurality of magnets 3, and a rotor sheath 4.

[0027] The hollow shaft 1 has a protruding ring 11 on its side, and a first positioning structure 112 is provided on one end face 111 of the protruding ring 11.

[0028] The plastic end plate 2 has a through hole 21 in the middle part and a second positioning structure 22 and multiple magnet bonding surfaces 23 on one side plane. The plastic end plate 2 is sleeved on the hollow shaft 1 through the through hole 21, and the first positioning structure 112 cooperates with the second positioning structure 22.

[0029] The plurality of magnets 3 are respectively attached to the plurality of magnet attachment surfaces 23, and the plurality of magnets 3 surround the side of the protruding ring 11.

[0030] The rotor sheath 4 is fitted and fixed at high temperature on the hollow shaft 1, and covers the multiple magnets 3.

[0031] By adding plastic end plates to the rotor assembly and mounting multiple magnets on these end plates, the need for a contour structure on the hollow shaft can be avoided, thus reducing the manufacturing cost of the rotor assembly. The rotor sheath is then fixed to the hollow shaft at high temperature, which not only secures the magnets but also eliminates the need for an insulating protective plate, reducing the complexity of the rotor assembly process and preventing the rotor sheath from being riveted to the insulating protective plate, thereby avoiding the possibility of the magnets being crushed.

[0032] Furthermore, reducing the number of insulating guard plates can also lower the manufacturing cost of the rotor assembly.

[0033] Furthermore, fixing the magnets with glue and curing the rotor sleeves outside the magnets with high temperature is safer and more reliable than riveting the rotor sleeves to fix the magnets.

[0034] In one embodiment, the first positioning structure 112 is a plurality of small holes, and the second positioning structure 22 is a plurality of protrusions that cooperate with the plurality of small holes.

[0035] In another embodiment, the first positioning structure is a plurality of protruding posts, and the second positioning structure 22 is a plurality of small holes that cooperate with the plurality of protruding posts.

[0036] In one embodiment, the plastic end plate 2 is provided with a plurality of protrusions 24 evenly distributed, and the platform of each protrusion 24 is a magnetic bonding surface 23.

[0037] By setting multiple bosses, it is easier to better fit the magnet.

[0038] In one embodiment, a plurality of position reference posts 25 are uniformly arranged on the plastic end plate 2, and a protrusion 24 is provided between two adjacent position reference posts 25, and the gap between the protrusion 24 forms an overflow groove 26.

[0039] By setting up this glue overflow groove, it is possible to avoid the glue overflow affecting the position of the magnets and the overall fit of the various components in the rotor assembly.

[0040] In one embodiment, the rotor sheath 4 includes a thin ring 41 and a columnar wall plate 42, one end of which coincides with the outer ring of the thin ring 41, and the columnar wall plate 42 covers the plurality of magnets 3.

[0041] By setting a thin ring, the rotor sheath can be better fitted to the hollow shaft and magnets, thereby better fixing the position of the magnets.

[0042] In one embodiment, the rotor sheath 4 is integrally injection molded.

[0043] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A rotor assembly for a hollow shaft brake motor, characterized in that, The utility model relates to a kind of rotors, including: Hollow shaft (1), plastic end plate (2), multiple magnetic steel (3) and rotor sheath (4); Wherein, the protruding ring sleeve (11) is provided on the side surface of the hollow shaft (1), and the first positioning structure (112) is provided on the side end surface (111) of the protruding ring sleeve (11); The middle part of the plastic end plate (2) is provided with a through hole (21), and the side plane is provided with a second positioning structure (22) and multiple magnetic steel sticking surface (23), the plastic end plate (2) is sleeved on the hollow shaft (1) by the through hole (21), and the first positioning structure (112) cooperates with the second positioning structure (22); Multiple magnetic steel (3) is respectively pasted on multiple magnetic steel sticking surface (23), and multiple magnetic steel (3) is surrounded on the side surface of the protruding ring sleeve (11); The rotor sheath (4) is sleeved and high-temperature fixed on the hollow shaft (1), and covers multiple magnetic steel (3).

2. The rotor assembly of a hollow shaft brake motor according to claim 1, wherein, The first positioning structure (112) is a plurality of small holes; The second positioning structure (22) is a plurality of convex columns matched with the plurality of small holes.

3. The rotor assembly of hollow shaft brake motor as claimed in claim 1 wherein, The first positioning structure (112) is a plurality of convex columns; The second positioning structure (22) is a plurality of small holes matched with the plurality of convex columns.

4. The rotor assembly of hollow shaft brake motor according to claim 1, wherein, Multiple protruding platforms (24) are uniformly provided on the plastic end plate (2), and the platform of each protruding platform (24) is a magnetic steel sticking surface (23).

5. The rotor assembly of a hollow shaft brake motor according to claim 4, wherein, Multiple position reference columns (25) are uniformly provided on the plastic end plate (2), and there is a protruding platform (24) between adjacent two position reference columns (25), and the gap between the protruding platform (24) forms a glue overflow groove (26).

6. The rotor assembly of a hollow shaft brake motor according to claim 1, wherein, The rotor sheath (4) includes a thin ring (41) and a columnar wall plate (42), one end of the columnar wall plate (42) coincides with the outer ring of the thin ring (41), and the columnar wall plate (42) covers multiple magnetic steel (3).

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