Rotor structure and motor
By setting up accommodating grooves and sliding components on the rotor end plate, the rotor balance is automatically adjusted by centrifugal force, the motor step noise problem caused by rotor imbalance is solved and the service life of the bearing is extended.
Patent Information
- Application Number
- CN202323437047.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-14
AI Technical Summary
During the manufacturing process, the rotor is unbalanced due to factors such as uneven material, process error, deformation and uneven wear, causing vibration and noise problems. The existing technology moves balance through weighting or deduplication, but it is difficult to adjust in real time, resulting in motor step noise. question.
Design a rotor structure, including setting a plurality of receiving grooves on the end plate, installing a sliding assembly, the sliding assembly includes an elastic member and a slider, which can automatically adjust the balance when the rotor rotates, and slide the sliding assembly in the receiving groove by centrifugal force. Achieve dynamic balance.
It realizes automatic balance of the rotor during rotation, reduces motor step noise problems, and extends the service life of the bearing.
Smart Images
Figure CN222191950U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of motor technology, and in particular to a rotor structure and a motor. Background Art
[0002] Due to factors such as uneven materials, process errors, rotor deformation, uneven wear or partial block loss, the rotor is always unbalanced. Unbalance causes rotor vibration, accelerates the wear of bearings, shaft seals and other components, reduces the service life and efficiency of the machine, and causes first-order noise problems. For this reason, the rotor needs to be dynamically balanced during the rotor manufacturing process.
[0003] In the prior art, dynamic balancing is to change the mass distribution of the rotor by removing weight or adding counterweights on the rotor end plate, so that the rotor vibration caused by the eccentric centrifugal force of the center of mass or the dynamic load acting on the bearing is reduced to within the allowable range to achieve the purpose of stable operation. New energy vehicle electric drive now generally adopts oil cooling solution. Generally, holes are punched on the rotor core to pass oil. The actual amount of oil in each hole is uneven, which will aggravate the imbalance and cause the motor to have step noise problem. Utility Model Content
[0004] The technical problem to be solved by the present application is to provide a rotor structure that can automatically adjust the dynamic balance of the rotor in real time during rotation, thereby reducing the problem of step noise in the motor.
[0005] In order to solve the above technical problems, this application adopts the following technical solutions:
[0006] In a first aspect, the present application provides a rotor structure, comprising: an end plate for connecting to a rotor core, wherein a plurality of receiving grooves are provided on one side of the end plate; a sliding assembly is provided in the receiving groove and connected to the end plate; wherein, when the rotor is rotating, the sliding assembly can slide in the receiving groove.
[0007] As an embodiment, the plurality of receiving grooves extend along a radial direction of the end plate.
[0008] As an embodiment, the plurality of accommodating grooves are evenly spaced along the circumference of the end plate.
[0009] As an implementation manner, the sliding assembly includes an elastic member and a sliding block, one end of the elastic member is connected to the sliding block, and the other end of the elastic member is connected to the side wall of the accommodating groove.
[0010] As an implementation mode, the side surface of the end plate having the accommodating groove is connected to the rotor core.
[0011] As an implementation manner, the sliding block is clearance-matched with the side wall of the accommodating groove.
[0012] As an embodiment, an insertion groove is further provided along the side wall of the accommodating groove, and the insertion groove extends along the radial direction of the end plate; the sliding block includes a protrusion, and the protrusion can be inserted into the insertion groove and can slide along the insertion groove.
[0013] As an embodiment, the accommodating groove includes a first sub-groove and a second sub-groove connected to each other, the plug-in groove is opened on the side wall of the first sub-groove, the width of the second sub-groove is larger than that of the first sub-groove, and the width of the second sub-groove is adapted to the width of the slider.
[0014] In a second aspect, the present application provides a motor, comprising a rotor structure provided in the first aspect.
[0015] The technical solution of this application has the following beneficial effects:
[0016] 1. By setting multiple receiving grooves on one side of the end plate, each receiving groove is equipped with a sliding assembly. When the end plate is connected to the rotor core, the sliding assembly can slide in the receiving groove during the rotation of the rotor, so that the rotor can automatically adjust the balance during the process, achieving the purpose of dynamic balancing and reducing the problem of step noise in the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic diagram of a partial structure of a rotor structure provided in an embodiment of the present application;
[0019] Figure 2 A schematic diagram of the structure of a rotor provided in an embodiment of the present application;
[0020] Figure 3 A schematic diagram of the structure of a sliding assembly provided in an embodiment of the present application;
[0021] Figure 4 A schematic diagram of the structure of the end plate provided in the embodiment of the present application;
[0022] Figure 5 A top view of a rotor structure provided for different embodiments of the present application;
[0023] Figure 6 A schematic diagram of the partial structure of the rotor structure provided in different embodiments of the present application.
[0024] Icons: 1-end plate; 11-accommodating groove; 111-first sub-groove; 112-second sub-groove; 12-plug-in groove; 2-rotor core; 3-sliding assembly; 31-elastic member; 32-sliding block; 321-protrusion. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.
[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0027] like Figures 1 to 3 As shown, in the first aspect, an embodiment of the present application provides a rotor structure, including an end plate 1, which is connected to a rotor core 2 to form a rotor, and an end plate 1 is respectively provided at both ends of the rotor core 2, and a plurality of receiving grooves 11 are provided on one side of each end plate 1, and a sliding component 3 is installed in each receiving groove 11, and the sliding component 3 can slide in the receiving groove 11. When the rotor rotates, the centrifugal force will drive the sliding component 3 to slide in the receiving groove 11, so that the sliding component 3 automatically adjusts the balance of the rotor to achieve the purpose of dynamic balancing, thereby reducing the step noise problem of the motor. Of course, it can further increase the life of the bearing.
[0028] like Figure 1 As shown, as an embodiment, each receiving groove 11 extends along the radial direction of the end plate 1, so that the sliding assembly 3 can slide along the radial direction of the end plate 1 at the same time, which is convenient for the sliding assembly 3 to automatically level by the difference of centrifugal force.
[0029] like Figure 1 As shown, as an embodiment, a plurality of accommodating grooves 11 are evenly spaced along the circumferential direction of the end plate 1, so that the sliding component 3 in each direction is subjected to balanced force, which facilitates the sliding component 3 to automatically adjust the balance.
[0030] Optionally, four or more accommodating slots 11 may be provided.
[0031] like Figure 3 As shown, as an embodiment, the sliding assembly 3 includes an elastic member 31 and a slider 32, one end of the elastic member 31 is connected to the slider 32, and the other end is connected to the side wall of the accommodating groove 11, so that the slider 32 can slide in the accommodating groove 11 under the restriction of the elastic member 31 to adjust the balance of the rotor.
[0032] Optionally, the elastic member 31 may be a spring, the connection between the spring and the slider 32 may be welding or clamping, the spring and the side wall of the accommodating groove 11 may be welding, etc., and the elastic member 31 is fixedly connected to the side wall of one end of the accommodating groove 11 in the length direction.
[0033] Optionally, the slider 32 may be a metal part.
[0034] As an implementation mode, the side of the end plate 1 having the receiving groove 11 is connected to the rotor core 2 , so that the rotor core 2 can fit the opening of the receiving groove 11 to prevent the slider 32 from falling out of the receiving groove 11 .
[0035] As an implementation manner, the slider 32 is clearance-matched with the side wall of the receiving groove 11 to facilitate the sliding of the slider 32 .
[0036] like Figures 3 to 6 As shown, as an embodiment, the two side walls in the axial direction of the accommodating groove 11 are respectively provided with plug-in grooves 12, and the plug-in grooves 12 also extend along the radial direction of the end plate 1. The slider 32 also includes two protrusions 321 located on both sides, and the two protrusions 321 are respectively adapted to the plug-in grooves 12. The two protrusions 321 are respectively inserted into the two plug-in grooves 12 and can slide along the plug-in grooves 12, so that the plug-in grooves 12 limit the slider 32, reducing the problem of the slider 32 falling along the axial direction of the rotor, and further allowing any side surface of the end plate 1 to be connected to the rotor core 2, thereby improving the adaptability of the end plate 1.
[0037] In addition, in some cases, receiving grooves 11 may be respectively opened on the two sides of the end plate 1, and the slider 32 in each receiving groove 11 is limited by the plug-in groove 12, thereby further improving the automatic balancing capability of the rotor.
[0038] like Figures 4 to 6 As shown, as an embodiment, the receiving groove 11 includes a first sub-groove 111 and a second sub-groove 112 that are interconnected. The plug-in groove 12 is opened on the side wall of the first sub-groove 111. The width of the second sub-groove 112 is larger than that of the first sub-groove 111. The width of the second sub-groove 112 is adapted to the width of the slider 32, so that the slider 32 can be installed in the second sub-groove 112 and then slide toward the first sub-groove 111, so that the two protrusions 321 are respectively embedded in the plug-in groove 12, thereby realizing the installation of the slider 32 in the receiving groove 11.
[0039] Optionally, the elastic member 31 is installed in the second sub-groove 112 to prevent the slider 32 from falling out of the second sub-groove 112 .
[0040] In a second aspect, an embodiment of the present application provides a motor, comprising the rotor structure provided in the first aspect.
[0041] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
[0042] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
Claims
1. A rotor structure, characterized in that: include: An end plate, used for connecting with the rotor core, wherein one side of the end plate is provided with a plurality of receiving grooves; A sliding assembly is disposed in the receiving groove and connected to the end plate; Wherein, when the rotor is rotating, the sliding assembly can slide in the receiving groove; The sliding assembly includes an elastic member and a slider, one end of the elastic member is connected to the slider, and the other end is connected to the side wall of the accommodating groove. The slider can slide in the accommodating groove under the restriction of the elastic member to adjust the balance of the rotor.
2. The rotor structure according to claim 1, characterized in that: The plurality of receiving grooves extend along a radial direction of the end plate.
3. The rotor structure according to claim 2, characterized in that: The plurality of accommodating grooves are evenly spaced along the circumference of the end plate.
4. The rotor structure according to claim 3, characterized in that: The side surface of the end plate on which the accommodating groove is opened is connected to the rotor core.
5. The rotor structure according to claim 4, characterized in that: The sliding block is clearance-matched with the side wall of the accommodating groove.
6. The rotor structure according to claim 3, characterized in that: An inserting groove is also provided along the side wall of the accommodating groove, and the inserting groove extends along the radial direction of the end plate; The sliding block includes a protrusion, and the protrusion can be inserted into the inserting groove and can slide along the inserting groove.
7. The rotor structure according to claim 6, characterized in that: The accommodating groove includes a first sub-groove and a second sub-groove which are interconnected. The plug-in groove is provided on the side wall of the first sub-groove. The width of the second sub-groove is larger than that of the first sub-groove. The width of the second sub-groove is adapted to the width of the slider.
8. A motor, characterized in that: A rotor structure comprising any one of claims 1 to 7.