Rotor assembly and motor
By setting an anti-rotation structure between the housing and the bearing seat and enhancing the frictional resistance through stamping and riveting, the problem of insufficient frictional resistance between the bearing seat and the housing in the brushless motor is solved, thus achieving stable rotation and normal use of the motor.
Patent Information
- Application Number
- CN202520286047.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-21
AI Technical Summary
In existing brushless motors, the frictional resistance between the bearing housing and the casing of the rotor assembly is insufficient, resulting in insufficient rotational force and easy occurrence of idling, which affects the normal use of the motor.
A first anti-rotation structure is provided on the inner sidewall of the mounting hole of the housing, and a second anti-rotation structure is provided on the outer sidewall of the bearing seat. The second anti-rotation structure is embedded in the first anti-rotation structure by stamping and riveting, thereby enhancing the frictional resistance and connection stability between the bearing seat and the housing.
It increases the rotational force of the rotor assembly, avoids idling, ensures the normal use of the motor, and extends its service life.
Smart Images
Figure CN223729557U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technical field, especially rotor assembly and motor of a kind of. BACKGROUND
[0002] Brushless motor is a kind of brushless permanent magnet DC motor, it realizes the commutation of motor by electronic control, without mechanical type brush and commutator, compared with brush motor, brushless motor has higher efficiency, longer life, smaller noise and higher operating speed, the working principle of brushless DC motor is based on electromagnetic induction and lorentz force principle, when current passes through stator coil, produce a rotating magnetic field, permanent magnet in rotor is subjected to lorentz force in this rotating magnetic field, cause rotor to follow stator magnetic field rotation, controller realizes the commutation of motor by controlling current and magnetic field, brushless motor has advantages in many applications, such as high efficiency, low noise, high speed and high torque, they are widely used in electric vehicles, household appliances, industrial equipment, aerospace and other fields.
[0003] Brushless motor in the process of working, rotor assembly relative to stator assembly rotation, rotor assembly is composed of shell, bearing seat and shaft, bearing seat sleeve joint in shaft, shell sleeve joint in bearing seat, relative static between shaft, bearing seat and shell. In prior art, shaft rotation drives bearing seat rotation, further drives shell rotation, however, due to the frictional resistance between bearing seat and shell is not strong, it is easy to cause insufficient rotating force and further cause idling, thus affect the normal use of motor. UTILITARIAN CONTENT
[0004] In order to solve the deficiency of the prior art, the utility model provides a kind of rotor assembly and motor, since the second anti-rotation structure is embedded in the first anti-rotation structure, so as to make bearing seat fixedly installed in the mounting hole of shell, thus improve the frictional resistance between bearing seat and mounting hole, further improve the rotating force of motor, avoid the phenomenon that idling occurs due to insufficient frictional resistance between shell and bearing seat.
[0005] The technical effects achieved by the utility model are realized by the following aspects:
[0006] Firstly, the utility model provides a kind of rotor assembly, comprising:
[0007] Shell, installation hole is set, the inner side wall of the installation hole is equipped with the first anti-rotation structure;
[0008] Bearing seat, installed in the installation hole, the outer side wall of the bearing seat is equipped with the second anti-rotation structure;And
[0009] Shaft, is arranged in the rotary center of the bearing seat;
[0010] The second anti-rotation structure is deformed under extrusion of external force and is embedded in the first anti-rotation structure to limit the relative movement of the bearing seat and the shell in the rotation direction.
[0011] In some implementations, the first anti-rotation structure includes an anti-rotation groove formed in the inner side wall of the mounting hole.
[0012] In the present implementation, the second anti-rotation structure is embedded in the anti-rotation groove to fix the bearing seat in the mounting hole of the shell, thereby improving the connection stability between the shell and the bearing seat.
[0013] In some implementations, the first anti-rotation structure includes an anti-rotation hole arranged on the shell around the mounting hole.
[0014] In the present implementation, when the bearing seat is installed in the mounting hole of the shell, the second anti-rotation structure is embedded in the anti-rotation hole by the process of stamping and riveting, thereby improving the connection stability between the shell and the bearing seat and enhancing the rotating force of the motor.
[0015] In some implementations, the number of the first anti-rotation structures is multiple, and the multiple anti-rotation grooves are formed at intervals along the inner peripheral wall of the mounting hole.
[0016] In the present implementation, the second anti-rotation structures are respectively riveted in the multiple anti-rotation grooves by stamping and riveting, thereby improving the frictional resistance and the connection stability between the shell and the bearing seat and further enhancing the rotating force of the motor.
[0017] In some implementations, the multiple anti-rotation grooves are evenly formed at intervals along the inner peripheral wall of the mounting hole.
[0018] In some implementations, the second anti-rotation structures are distributed along the outer peripheral wall of the bearing seat.
[0019] In some implementations, the second anti-rotation structures protrude from the side of the bearing seat facing away from the interior of the shell in the axial direction of the rotating shaft.
[0020] In the present implementation, when stamping and riveting, the second anti-rotation structures are deformed under the action of extrusion of external force and are embedded in the anti-rotation grooves, thereby enhancing the connection stability between the shell and the bearing seat.
[0021] In some implementations, the outer side wall of the bearing seat is further provided with a first limiting structure, and the shell is further provided with a second limiting structure near the mounting hole, which cooperates with the first limiting structure to limit the axial movement of the bearing seat.
[0022] In the present implementation, the outer side wall of the bearing seat is provided with a first limiting structure, and the position of the shell close to the mounting hole is provided with a second limiting structure, the second limiting structure cooperates with the first limiting structure to limit the axial movement of the bearing seat relative to the mounting hole of the shell, thereby making the bearing seat more stable installation in the mounting hole, and improving the connection stability between the bearing seat and the shell.
[0023] In some implementations, the first limiting structure includes a protrusion provided on the outer side wall of the bearing seat, and the second limiting structure includes an abutting portion provided on the position of the shell close to the mounting hole.
[0024] In a second aspect, the utility model provides a motor, including stator subassembly and above -mentioned rotor subassembly, the shell is opened with the installation cavity that communicates with the mounting hole, the stator subassembly is installed in the installation cavity, the rotating shaft is worn in the stator subassembly.
[0025] In summary, the utility model has at least the following advantages:
[0026] The rotor subassembly provided by the utility model, the shell is provided with a mounting hole, the bearing seat is installed in the mounting hole, the rotating shaft is worn in the bearing seat and located in the inside of the shell, the inner side wall of the mounting hole is provided with a first anti-rotation structure, the outer side wall of the bearing seat is provided with a second anti-rotation structure, the second anti-rotation structure is embedded in the first anti-rotation structure to limit the circumferential rotation of the bearing seat relative to the inner wall of the mounting hole, thereby improving the frictional resistance between the bearing seat and the shell, and further enhancing the rotating force of the motor, avoiding the loosening between the bearing seat and the shell during the rotation of the rotor subassembly, and further avoiding the problem of motor idling, and ensuring the normal use of the motor. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 It is a structure schematic view of the rotor subassembly of example 1.
[0028] Figure 2 It is a structure schematic view of the rotor subassembly of example 1. Figure 1 It is a structure schematic view of the second anti-rotation structure and the anti-rotation groove.
[0029] Figure 3 It is a structure schematic view of the second anti-rotation structure and the anti-rotation hole. Figure 1 It is a structure schematic view of the second anti-rotation structure and the anti-rotation hole.
[0030] Figure 4 It is a structure schematic view of the rotor subassembly of example 2.
[0031] Figure 5 It is a structure schematic view of the rotor subassembly of example 2.
[0032] Figure 6 It is a structure schematic view of the motor of example 3.
[0033] Reference signs in the drawings:
[0034] 1. A rotor assembly;
[0035] 10. A housing; 11. A mounting hole; 12. A first anti-rotation structure; 121. An anti-rotation groove; 122. An anti-rotation hole; 13. A second limiting structure; 131. An abutting portion; 14. A mounting cavity;
[0036] 20. A bearing seat; 21. A second anti-rotation structure; 22. A first limiting structure; 221. A protrusion;
[0037] 30. A rotating shaft;
[0038] 2. An electric machine;
[0039] 40. A stator assembly. DETAILED DESCRIPTION
[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.
[0041] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.
[0042] Example 1
[0043] Please refer to the drawings Figure 1 Drawings Figure 3 The rotor assembly 1 of the present application comprises a housing 10, a bearing seat 20 and a rotating shaft 30.
[0044] Among them, please refer to Figure 1 , Figure 1 The structural relationship among the housing 10, the bearing seat 20 and the rotating shaft 30 in the embodiments of the present application is shown. Specifically, the housing 10 is provided with a mounting hole 11, and the inner side wall of the mounting hole 11 is provided with a first anti-rotation structure 12; the bearing seat 20 is installed in the mounting hole 11, and the outer side wall of the bearing seat 20 is provided with a second anti-rotation structure 21; the rotating shaft 30 is arranged at the rotation center of the bearing seat 20. Among them, the second anti-rotation structure 21 is deformed under the extrusion of external force and is embedded in the first anti-rotation structure 12 to limit the relative movement of the bearing seat 20 and the housing 10 in the rotation direction.
[0045] In the embodiment, the inner wall of the mounting hole 11 of the shell 10 is provided with the first anti-rotation structure 12, the bearing seat 20 is installed in the mounting hole 11, and the connection part between the bearing seat 20 and the mounting hole 11 is provided with the second anti-rotation structure 21. The second anti-rotation structure 21 cooperates with the first anti-rotation structure 12 to stably install the bearing seat 20 in the mounting hole 11 of the shell 10, prevent the bearing seat 20 from rotating relative to the shell 10, and improve the connection stability between the bearing seat 20 and the shell 10.
[0046] Specifically, during assembly, when the bearing seat 20 is installed in the mounting hole 11 of the shell 10, the second anti-rotation structure 21 abuts against the inner circumferential wall of the mounting hole 11 of the shell 10. The second anti-rotation structure 21 is riveted to the first anti-rotation structure 12 through a stamping riveting process, so that the second anti-rotation structure 21 is embedded in the first anti-rotation structure 12, and the bearing seat 20 is fixedly installed in the mounting hole 11. The rotating shaft 30 penetrates the bearing seat 20 and is located in the interior of the shell 10. Thus, when the motor 2 is powered on, the rotating shaft 30 starts to rotate, thereby driving the bearing seat 20 to rotate and further driving the shell 10 to rotate. Since the first limiting structure 22 cooperates with the second limiting structure 13 to fixedly install the bearing seat 20 in the mounting hole 11 of the shell 10, the frictional resistance between the bearing seat 20 and the mounting hole 11 is improved, and the rotating force of the motor 2 is further improved, thereby avoiding the phenomenon of idling due to insufficient frictional resistance between the shell 10 and the bearing seat 20.
[0047] The above rotor assembly 1, the shell 10 is provided with the mounting hole 11, the bearing seat 20 is installed in the mounting hole 11, the rotating shaft 30 penetrates the bearing seat 20 and is located in the interior of the shell 10, the inner side wall of the mounting hole 11 is provided with the first anti-rotation structure 12, the outer side wall of the bearing seat 20 is provided with the second anti-rotation structure 21, and the second anti-rotation structure 21 is embedded in the first anti-rotation structure 12 to limit the bearing seat 20 from rotating circumferentially relative to the inner wall of the mounting hole 11. Thus, the frictional resistance between the bearing seat 20 and the shell 10 is improved, the rotating force of the motor 2 is further enhanced, the problem of loosening between the bearing seat 20 and the shell 10 during rotation of the rotor assembly 1 is avoided, and the normal use of the motor 2 is ensured.
[0048] In some preferred embodiments, please refer to Figure 2 , Figure 2The structure relationship between the anti-rotation groove 121 and the second anti-rotation structure 21 in the embodiment of the utility model is shown. Specifically, the first anti-rotation structure 12 comprises the anti-rotation groove 121 which is arranged on the inner side wall of the mounting hole 11. The second anti-rotation structure 21 is embedded in the anti-rotation groove 121, so that the bearing seat 20 is fixedly installed in the mounting hole 11 of the shell 10, thereby improving the connection stability between the shell 10 and the bearing seat 20. It can be understood that the second anti-rotation structure 21 is embedded in the anti-rotation groove 121 by means of stamping and riveting, the second anti-rotation structure 21 is deformed and expanded, and then filled into the anti-rotation groove 121, so as to form a stable connection structure.
[0049] Further, referring to Figure 3 , Figure 3 The structure relationship between the anti-rotation hole 122 and the second anti-rotation structure 21 in the embodiment of the utility model is shown. Specifically, the first anti-rotation structure 12 comprises the anti-rotation hole 122 which is arranged on the shell 10 around the mounting hole 11. When the bearing seat 20 is installed in the mounting hole 11 of the shell 10, the second anti-rotation structure 21 is embedded in the anti-rotation hole 122 by means of stamping and riveting, so as to improve the connection stability between the shell 10 and the bearing seat 20, thereby enhancing the rotating force of the motor. It should be noted that the anti-rotation hole 122 can be a through hole or a blind hole.
[0050] In some preferred embodiments, the number of the first anti-rotation structure 12 is multiple, and the multiple anti-rotation grooves 121 are arranged at intervals along the inner peripheral wall of the mounting hole 11. The second anti-rotation structure 21 is riveted in the multiple anti-rotation grooves 121 by means of stamping and riveting, thereby improving the frictional resistance and the connection stability between the shell 10 and the bearing seat 20, and further enhancing the rotating force of the motor 2.
[0051] In some preferred embodiments, the multiple anti-rotation grooves 121 are arranged at intervals on the average along the inner peripheral wall of the mounting hole 11. The force of the motor 2 during rotation is shared by the riveting structure formed by the second anti-rotation structure 21 and the anti-rotation groove 121, so as to avoid loosening between the bearing seat 20 and the shell 10, thereby avoiding the problem of idling of the motor 2, and prolonging the service life of the motor 2.
[0052] Further, the anti-rotation groove 121 is arranged as a circular groove structure with a smooth inner wall. When stamping and riveting, the anti-rotation part 211 can be more smoothly embedded in the anti-rotation groove 121, thereby improving the riveting efficiency and further improving the production efficiency of the motor.
[0053] In some preferred embodiments, the second anti-rotation structure 21 is distributed along the outer peripheral wall of the bearing seat 20. The connection area between the bearing seat 20 and the shell 10 is increased, thereby enhancing the connection stability between the bearing seat 20 and the shell 10, so as to ensure the reliability of the motor.
[0054] In some more preferred embodiments, the second anti-rotation structure 21 protrudes from the bearing seat 20 away from the interior of the housing 10 along the axial direction of the shaft 30. During stamping and riveting, the second anti-rotation structure 21 deforms under the pressure of external force and then embeds into the anti-rotation groove 121 to enhance the connection stability between the housing 10 and the bearing seat 20. Preferably, after installation, the second anti-rotation structure 21 is parallel to the outer peripheral wall of the housing, that is, the side of the housing away from the interior.
[0055] Example 2:
[0056] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the rotor assembly 1 of this utility model. Please refer to the appendix. Figure 4 ~Appendix Figure 5 .
[0057] Please see below. Figure 4 , Figure 4 The diagram illustrates the structural relationship between the first limiting structure 22 and the second limiting structure 13 in this embodiment of the present invention. Specifically, the outer wall of the bearing seat 20 is also provided with the first limiting structure 22, and the housing 10 is also provided with the second limiting structure 13 near the mounting hole 11, which cooperates with the first limiting structure 22 to restrict the axial movement of the bearing seat 20.
[0058] In this embodiment, the outer side wall of the bearing housing 20 is provided with a first limiting structure 22, and the housing 10 is provided with a second limiting structure 13 near the mounting hole 11. The second limiting structure 13 cooperates with the first limiting structure 22 to restrict the axial movement of the bearing housing 20 relative to the mounting hole 11 of the housing 10, thereby making the bearing housing 20 more securely installed in the mounting hole 11 and improving the connection stability between the bearing housing 20 and the housing 10.
[0059] In some preferred embodiments, please refer to Figure 5 , Figure 5 The diagram illustrates the structural relationship between the protrusion 221 and the abutment portion 131 in this embodiment of the present invention. Specifically, the first limiting structure 22 includes a protrusion 221 disposed on the outer side wall of the bearing seat 20, and the second limiting structure 13 includes an abutment portion 131 disposed on the housing 10 near the mounting hole 11. The bearing seat 20 passes through the mounting hole 11 of the housing 10, and the protrusion 221 of the bearing seat 20 abuts against the abutment portion 131 on the outer periphery of the mounting hole 11 to increase the connection area between the bearing seat 20 and the housing 10, thereby improving the connection stability between the bearing seat 20 and the housing 10, thus increasing the rotational force of the motor 2 and further ensuring the reliability of the motor 2. Furthermore, the protrusion 221 is distributed along the outer peripheral wall of the bearing seat 20 to form a convex ring, and the abutment portion 131 is distributed along the outer periphery of the mounting hole 11 and is configured to cooperate with the convex ring.
[0060] Example 3:
[0061] The embodiment provides a motor 2 based on the above-mentioned embodiment, please refer to the attached Figure 6 .
[0062] A motor 2, comprising a stator assembly 40 and the above-mentioned rotor assembly 1.
[0063] Wherein, the shell 10 is provided with an installation cavity 14 communicated with the installation hole 11, the stator assembly 40 is installed in the installation cavity 14, and the rotating shaft 30 is arranged in the stator assembly 40.
[0064] In the embodiment, the stator assembly 40 is installed in the installation cavity 14, the shell 10 protects the stator assembly 40, and the problem that the stator assembly 40 is scratched with external objects and causes failure is avoided, the rotating shaft 30 is arranged in the stator assembly 40, when the motor 2 is powered, the rotating shaft 30 drives the bearing seat 20 and the shell 10 to rotate relative to the stator assembly 40, and thus the reliability of the motor 2 is ensured.
[0065] The motor 2 of the utility model, the shell 10 is provided with the installation hole 11, the bearing seat 20 is installed in the installation hole 11, the rotating shaft 30 is arranged in the bearing seat 20 and is located in the inside of the shell 10, the inside wall of the installation hole 11 is equipped with the first anti-rotation structure 12, the outside wall of the bearing seat 20 is equipped with the second anti-rotation structure 21, the second anti-rotation structure 21 is embedded in the first anti-rotation structure 12, so as to limit the bearing seat 20 to rotate circumferentially relative to the inner wall of the installation hole 11, thus the frictional resistance between the bearing seat 20 and the shell 10 is improved, and thus the rotating force of the motor 2 is enhanced, the problem that the bearing seat 20 and the shell 10 are loose and thus the motor 2 idles during the rotation of the rotor assembly 1 is avoided, and normal use of the motor 2 is ensured.
[0066] In the utility model, unless there is definite stipulation and limitation, the terms such as '' install '' '' connect '' '' fixed '' and the like should be understood broadly, for example, can be fixed connection, also can be detachable connection, or integrated, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.
[0067] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown based on the drawings, or is the orientation or position relation commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.
[0068] In addition, the terms "horizontal", "vertical", "overhang" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0069] In the utility model, unless otherwise explicitly specified and limited, the first feature above or below the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature therebetween. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.
[0070] Although the description of the utility model is combined with the above specific embodiments, it is obvious that persons skilled in the art can make many substitutions, modifications and changes according to the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.
Claims
1. A rotor assembly characterized by, include: The housing (10) has a mounting hole (11), and the inner wall of the mounting hole (11) is provided with a first anti-rotation structure (12). A bearing housing (20) is installed in the mounting hole (11), and the outer side wall of the bearing housing (20) is provided with a second anti-rotation structure (21); and A rotating shaft (30) is inserted through the rotation center of the bearing housing (20); The second anti-rotation structure (21) deforms under external pressure and is embedded in the first anti-rotation structure (12) to restrict the relative movement of the bearing seat (20) and the housing (10) in the rotation direction.
2. The rotor assembly of claim 1, wherein The first anti-rotation structure (12) includes an anti-rotation groove (121) formed on the inner sidewall of the mounting hole (11).
3. The rotor assembly of claim 1, wherein The first anti-rotation structure (12) includes an anti-rotation hole (122) disposed on the housing (10) around the mounting hole (11).
4. The rotor assembly of claim 2, wherein The number of the first anti-rotation structure (12) is multiple, and the multiple anti-rotation grooves (121) are spaced apart along the inner peripheral wall of the mounting hole (11).
5. The rotor assembly of claim 3, wherein Multiple anti-rotation grooves (121) are evenly spaced on the inner peripheral wall of the mounting hole (11).
6. The rotor assembly of any one of claims 2-5, wherein, The second anti-rotation structure (21) is distributed along the outer peripheral wall of the bearing housing (20).
7. The rotor assembly of claim 6, wherein The second anti-rotation structure (21) protrudes from the bearing seat (20) away from the interior of the housing (10) along the axial direction of the rotating shaft (30).
8. The rotor assembly of claim 1, wherein The outer side wall of the bearing seat (20) is also provided with a first limiting structure (22), and the housing (10) near the mounting hole (11) is also provided with a second limiting structure (13) that cooperates with the first limiting structure (22) to restrict the axial movement of the bearing seat (20).
9. The rotor assembly of claim 8, wherein, The first limiting structure (22) includes a protrusion (221) on the outer side wall of the bearing seat (20), and the second limiting structure (13) includes an abutment (131) on the housing (10) near the mounting hole (11).
10. An electric machine characterized by The device includes a stator assembly (40) and a rotor assembly (1) according to any one of claims 1 to 9. The housing (10) has a mounting cavity (14) communicating with the mounting hole (11). The stator assembly (40) is installed in the mounting cavity (14), and the rotating shaft (30) passes through the stator assembly (40).