Damping rotor with hollow structure

Abstract

The utility model discloses a damping rotor with a hollow structure, which comprises a rotor iron core, a rotating shaft mounting hole arranged in the rotor iron core, a rotating shaft arranged in the rotating shaft mounting hole, an iron core hollow part arranged outside the rotating shaft mounting hole in the rotor iron core, and a damping piece arranged in the iron core hollow part. The outer side of the rotor core is provided with a plurality of magnetic members arranged around the rotor core, thereby reducing the overall weight of the rotor, and improving the starting speed of the rotor.

Description

[Technical Field]

[0001] This utility model relates to the field of DC motors, and in particular to a shock-absorbing rotor with a hollow structure. [Background Technology]

[0002] The rotors of brushless DC motors currently used in the small household appliance industry are all solid rotors, which have problems such as large rotor runout during operation, heavy rotor core and slow start-up, and large dynamic balance deviation after injection molding of the outer rotor bracket, resulting in large vibration of the whole machine. [Utility Model Content]

[0003] This invention overcomes the shortcomings of the prior art and provides a shock-absorbing rotor with a hollow structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A hollow structure shock-absorbing rotor is characterized by: including a rotor core, a shaft mounting hole inside the rotor core, a shaft installed in the shaft mounting hole, a hollow part inside the rotor core located outside the shaft mounting hole, a shock-absorbing component inside the hollow part, and a plurality of magnetic components arranged around the rotor core on the outside of the rotor core.

[0006] The shock-absorbing rotor with a hollow structure as described above is characterized in that: the rotor core includes multiple open-circuit magnetic circuit iron chips and closed-circuit magnetic circuit iron chips, and multiple open-circuit magnetic circuit iron chips are arranged between adjacent closed-circuit magnetic circuit iron chips.

[0007] The shock-absorbing rotor with a hollow structure as described above is characterized in that: the open-circuit magnetic circuit iron chip of the rotor includes a central annular plate and an outer annular plate of the open-circuit iron core; the closed-circuit magnetic circuit iron chip of the rotor includes a central annular plate and an outer annular plate of the closed-circuit iron core; the central annular plate and the outer annular plate of the closed-circuit iron core are connected by a closed-circuit iron core connecting part; and the hollow parts between the central annular plate and the outer annular plate of the closed-circuit iron core and between the central annular plate and the outer annular plate of the closed-circuit iron core form a hollow part of the iron core.

[0008] The shock-absorbing rotor with a hollow structure as described above is characterized in that: three evenly arranged closed-circuit core connecting parts are provided between the middle annular plate of the closed-circuit core and the outer annular plate of the closed-circuit core.

[0009] The shock-absorbing rotor with a hollow structure as described above is characterized in that: the outer side of the rotor core is provided with a plurality of magnetic component positioning grooves for magnetic components to be inserted; the outer side of the outer ring plate of the open-circuit core is provided with a plurality of open-circuit iron chip positioning grooves; the outer side of the outer ring plate of the closed-circuit core is provided with a plurality of closed-circuit iron chip positioning grooves; and the magnetic component positioning grooves are composed of open-circuit iron chip positioning grooves and closed-circuit iron chip positioning grooves.

[0010] The shock-absorbing rotor with a hollow structure as described above is characterized in that: the magnetic components include multiple N-polar magnets and S-polar magnets, the number of N-polar magnets and S-polar magnets are the same, and they are alternately arranged on the outside of the rotor core.

[0011] The shock-absorbing rotor with a hollow structure as described above is characterized in that: the shock-absorbing component is an integral structure made of BMC bulk molding compound by injection molding.

[0012] The shock-absorbing rotor with a hollow structure as described above is characterized in that: a rotor support is provided outside the rotor core to fix the magnetic components to the rotor core.

[0013] The shock-absorbing rotor with a hollow structure as described above is characterized in that: the outer side of the rotor support is provided with multiple through holes for exposing magnetic components.

[0014] The shock-absorbing rotor with a hollow structure as described above is characterized in that: the rotor support is an integral structure made of BMC bulk molding compound by injection molding.

[0015] The beneficial effects of this utility model are:

[0016] This invention features a hollowed-out section within the rotor core, reducing the overall weight of the rotor and increasing its starting speed. The hollowed-out section is filled with low-density damping components, effectively altering the natural frequency at which the mechanical energy output from the entire magnetic field is transmitted to the rotor shaft, thus improving overall vibration and noise levels. The rotor core is composed of alternating links of open-circuit and closed-circuit magnetic circuit iron chips, ensuring high concentricity and effectively preventing poor concentricity caused by single open-circuit separation. Simultaneously, the internal magnetic circuit break structure prevents magnetic flux leakage, reduces losses, improves magnetic flux density utilization, and reduces the risk of motor demagnetization. An external rotor support is provided to fix the magnetic components to the rotor core. This rotor support is an integral structure made of BMC bulk molding compound, enhancing mechanical strength and effectively preventing the magnetic components from detaching at high rotor speeds. [Image Description]

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is one of the exploded views of this utility model;

[0019] Figure 3 This is the second exploded view of the present invention;

[0020] Figure 4 This is a schematic diagram of the rotor open-circuit magnetic circuit iron chip structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the rotor closed-circuit magnetic circuit iron chip structure of this utility model. [Detailed Implementation]

[0022] The technical solutions in the embodiments of this utility model will now be clearly and completely described in conjunction with the accompanying drawings.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. Furthermore, descriptions involving "preferred," "second-best," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "preferred" or "second-best" may explicitly or implicitly include at least one of those features.

[0024] like Figure 1-5 As shown, a hollow-structured vibration-damping rotor includes a rotor core 1, a shaft mounting hole 11 inside the rotor core 1, a shaft 2 installed inside the shaft mounting hole 11, and a hollow section 12 outside the shaft mounting hole 11 inside the rotor core 1, reducing the overall weight of the rotor and improving the rotor's starting speed. A damping element 3 is installed inside the hollow section 12, which can effectively change the natural frequency of the mechanical energy output from the entire magnetic field transmitted to the rotor shaft, thereby improving the vibration and noise of the entire machine. Multiple magnetic elements 4 are arranged around the rotor core 1 on its outer side. In actual operation, the hollow-designed rotor core reduces the weight of the rotor assembly, enabling rapid rotor start-up, while the damping element inside the hollow section of the rotor core improves the vibration and noise of the entire machine.

[0025] like Figure 3-5 As shown, the rotor core 1 includes multiple rotor open-circuit magnetic circuit iron chips 13 and rotor closed-circuit magnetic circuit iron chips 14. Multiple rotor open-circuit magnetic circuit iron chips 13 are arranged between adjacent rotor closed-circuit magnetic circuit iron chips 14. By alternately linking open and closed circuits, the operating vibration of the rotor assembly can be reduced, and the concentricity problem caused by a single open circuit being separated can be effectively avoided, improving the utilization rate of magnetic circuit magnetic density and reducing the risk of motor demagnetization. In the actual application of this case, three sets of rotor closed-circuit magnetic circuit iron chip groups are set. Each set of rotor closed-circuit magnetic circuit iron chip groups includes two stacked rotor closed-circuit magnetic circuit iron chips 14, and adjacent rotor closed-circuit magnetic circuit iron chip groups are respectively provided with the same number of stacked rotor open-circuit magnetic circuit iron chips 13. In the actual application, ten stacked rotor open-circuit magnetic circuit iron chips 13 are arranged between adjacent rotor closed-circuit magnetic circuit iron chip groups.

[0026] like Figure 4-5As shown, the rotor open-circuit magnetic circuit iron chip 13 includes a central annular plate 131 and an outer annular plate 132 of the open-circuit iron core, and the rotor closed-circuit magnetic circuit iron chip 14 includes a central annular plate 141 and an outer annular plate 142 of the closed-circuit iron core. The central annular plate 141 and the outer annular plate 142 of the closed-circuit iron core are connected by a closed-circuit iron core connecting part 143, so as to realize the alternating connection of open and closed circuits of the magnetic circuit iron chips in the rotor iron core.

[0027] like Figure 4-5 As shown, the hollow portions between the middle annular plate 141 and the outer annular plate 142 of the closed-circuit iron core, and between the middle annular plate 141 and the outer annular plate 142 of the closed-circuit iron core, form the hollow portion 12 of the iron core, reducing the rotor weight.

[0028] like Figure 5 As shown, three evenly arranged closed-circuit core connecting parts 143 are provided between the middle annular plate 141 and the outer annular plate 142 of the closed-circuit core, so that the middle annular plate and the outer annular plate of the closed-circuit core have both lightweight and stable connection.

[0029] like Figure 2-3 As shown, the outer side of the rotor core 1 is provided with multiple magnetic component positioning slots 15 for the magnetic components 4 to be installed. The outer side of the open-circuit core outer ring plate 132 is provided with multiple open-circuit iron chip positioning slots 1321. The outer side of the closed-circuit core outer ring plate 142 is provided with multiple closed-circuit iron chip positioning slots 1421. The magnetic component positioning slots 15 are composed of open-circuit iron chip positioning slots 1321 and closed-circuit iron chip positioning slots 1421, so that each magnetic component is positioned and installed on the outer side of the rotor core.

[0030] like Figure 2-3 As shown, the magnetic component 4 includes multiple N-polar magnets and S-polar magnets. The number of N-polar magnets and S-polar magnets are equal, and they are alternately arranged on the outside of the rotor core 1 to ensure stable rotation of the rotor assembly. In the actual application of this case, five N-polar magnets and five S-polar magnets are used.

[0031] In this case, the shock absorber 3 is an integral structure made of BMC bulk molding compound by injection molding, which improves the overall compactness and reduces the rotor weight.

[0032] like Figure 1-3 As shown, the rotor core 1 is provided with a rotor bracket 2 to fix the magnetic component 4 on the rotor core 1. The rotor bracket 2 is an integral structure made of BMC bulk molding compound by injection molding, which improves the mechanical strength between the rotor core and the magnetic component and can effectively prevent the magnetic component from falling off at high speed.

[0033] like Figure 1-3 As shown, the outer side of the rotor support 2 is provided with multiple rotor support through holes 21 for exposing the magnetic components 4, thereby reducing the weight of the rotor support.

[0034] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A shock-absorbing rotor with a hollow structure, characterized in that: The rotor core (1) includes a rotor core (1), a shaft mounting hole (11) inside the rotor core (1), a shaft installed inside the shaft mounting hole (11), a core hollow part (12) outside the shaft mounting hole (11) inside the rotor core (1), a shock absorber (3) inside the core hollow part (12), and multiple magnetic components (4) arranged around the rotor core (1) on the outside of the rotor core (1); the rotor core (1) includes multiple open-circuit magnetic circuit iron chips (13) and closed-circuit magnetic circuit iron chips (14), with multiple open-circuit magnetic circuit iron chips (13) between adjacent closed-circuit magnetic circuit iron chips (14); the open-circuit magnetic circuit iron chips (13) are arranged in a specific configuration. The circuit iron chip (13) includes a central ring plate (131) of the open circuit iron core and an outer ring plate (132) of the open circuit iron core. The rotor closed circuit magnetic circuit iron chip (14) includes a central ring plate (141) of the closed circuit iron core and an outer ring plate (142) of the closed circuit iron core. The central ring plate (141) of the closed circuit iron core and the outer ring plate (142) of the closed circuit iron core are connected by a closed circuit iron core connecting part (143). The hollow part between the central ring plate (141) of the closed circuit iron core and the outer ring plate (142) of the closed circuit iron core and the hollow part between the central ring plate (141) of the closed circuit iron core and the outer ring plate (142) of the closed circuit iron core form the core hollow part (12).

2. The hollow structure damping rotor according to claim 1, characterized in that: Three evenly spaced closed-circuit core connecting parts (143) are provided between the central annular plate (141) of the closed-circuit core and the outer annular plate (142) of the closed-circuit core.

3. The hollow structure damping rotor according to claim 1, characterized in that: The rotor core (1) has multiple magnetic component positioning slots (15) for the magnetic components (4) to be installed on the outside. The outer side of the open-circuit iron core outer ring plate (132) has multiple open-circuit iron chip positioning slots (1321). The outer side of the closed-circuit iron core outer ring plate (142) has multiple closed-circuit iron chip positioning slots (1421). The magnetic component positioning slots (15) are composed of open-circuit iron chip positioning slots (1321) and closed-circuit iron chip positioning slots (1421).

4. A hollow structure damping rotor according to claim 1 or 3, characterized in that: The magnetic component (4) includes multiple N-polar magnets and S-polar magnets, with the same number of N-polar magnets and S-polar magnets, which are alternately arranged on the outside of the rotor core (1).

5. A shock-absorbing rotor with a hollow structure according to claim 1, characterized in that: The shock absorber (3) is an integral structure made of BMC bulk molding compound by injection molding.

6. The shock-absorbing rotor with a hollow structure according to claim 1, characterized in that: The rotor core (1) is provided with a rotor bracket (2) for fixing the magnetic component (4) to the rotor core (1).

7. A shock-absorbing rotor with a hollow structure according to claim 6, characterized in that: The outer side of the rotor support (2) is provided with multiple through holes (21) for the exposed magnetic components (4).

8. A shock-absorbing rotor with a hollow structure according to claim 7, characterized in that: The rotor support (2) is an integral structure made of BMC bulk molding compound by injection molding.

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