Motor rotor structure

Abstract

The utility model discloses a motor rotor structure, which relates to the field of rotor structures, comprises a rotating shaft rod and a rotor iron core, and is characterized in that the rotating shaft rod penetrates through the rotor iron core, the rotor iron core is axially provided with a steel groove, magnetic steel is arranged in the magnetic steel groove, the magnetic steel penetrates through the rotor iron core, and the two ends of the magnetic steel protrude out of the rotor iron core; the rotating shaft rod is provided with a protective cover, the protective cover can cover the rotor core and the magnetic steel in a sealed mode, a clamping mechanism is arranged on the inner side of the protective cover, and when the rotor core and the magnetic steel are covered in the protective cover in a sealed mode, the magnetic steel protruding out of the rotor core can be clamped with the clamping mechanism. According to the utility model, the end covers at the two ends of the rotor iron core are replaced by the protective covers, and the magnetic steel is arranged in a convex manner and is clamped with the protective covers, so that the purposes of protecting the rotor iron core and internal parts thereof and improving the overall rotation stability of the rotor are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotor structure field, concretely relates to a motor rotor structure. BACKGROUND

[0002] With the rapid development of automobile industry, the requirement for engine performance is higher and higher. As an important component of automobile engine, the reliability of motor rotor directly affects the efficiency and life of engine. During the operation of automobile engine, it will face various challenges of harsh environment, such as moisture, corrosive gas and liquid. Therefore, the waterproof and anticorrosion technology of motor rotor is crucial to ensure the long-term stable operation of automobile engine. The motor rotor is the key component of motor that generates rotary motion, usually composed of shaft, rotor core and winding. In automobile engine, motor rotor interacts with stator to convert electrical energy into mechanical energy, driving the operation of engine. The performance of rotor not only determines the efficiency of motor, but also relates to the power output of the whole automobile.

[0003] During the operation of automobile engine, it may encounter the erosion of moisture and corrosive substances, which can come from engine cooling system, fuel system or external environment. If the waterproof and anticorrosion performance of motor rotor is insufficient, it will lead to the degradation of rotor material, the decline of insulation performance, and even cause electrical failure, affecting the normal operation of engine.

[0004] Therefore, the present application is proposed. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a motor rotor structure, which replaces the end covers of rotor core with protective covers, and sets the magnetic steel outwardly protruding to engage with the protective cover, so as to solve the problem of corrosion and degradation of rotor core and internal components in the prior art.

[0006] The utility model embodiment realizes the following technical scheme: the utility model embodiment provides a motor rotor structure, which comprises a shaft rod and a rotor core, characterized in that the shaft rod penetrates the rotor core, the rotor core is axially provided with a steel groove, a magnetic steel is installed in the steel groove, the magnetic steel penetrates the rotor core, and the two ends of the magnetic steel outwardly protrude from the rotor core.

[0007] A protective cover is arranged on the shaft rod, the protective cover can seal and cover the rotor core and the magnetic steel, a clamping mechanism is arranged on the inner side of the protective cover, when the rotor core and the magnetic steel are sealed and covered in the protective cover, the magnetic steel outwardly protruding from the rotor core can be clamped with the clamping mechanism.

[0008] Preferably, the protective cover comprises a cover part and a cover part, the centers of the cover part and the cover part are respectively provided with center holes, the shaft rod penetrates the center holes, the rotor core is arranged between the cover part and the cover part, and the cover part and the cover part can slide along the shaft rod in the axial direction.

[0009] Preferably, the connection between the center hole and the rotating shaft rod is sealed by sealing glue when the cover part and the cover part are covered.

[0010] Preferably, the rotating shaft rod is provided with a first protrusion and a second protrusion, the first protrusion seals the gap between the hole wall of the center hole of the cover part and the rotating shaft rod, and the second protrusion seals the gap between the hole wall of the center hole of the cover part and the rotating shaft rod when the cover part and the cover part are covered.

[0011] Preferably, the outer side wall of the open end of the cover part is provided with external threads, and the inner side wall of the cover part is provided with internal threads, and the internal threads and the external threads can lock the cover part and the cover part.

[0012] Preferably, the clamping mechanism comprises a groove provided on the inner side of the sealing surface of the cover part, the magnetic steel protruding outward from the cover part side of the rotor core is inserted into the groove when the cover part and the cover part are locked, and the magnetic steel protruding outward from the cover part side of the rotor core is combined with the bottom surface of the cover part.

[0013] Preferably, the bottom surface of the cover part is provided with a ring groove, and the rotor core is provided with a ring piece on the outer periphery of the cover part side, and the ring piece is inserted into the ring groove when the cover part and the cover part are locked.

[0014] Preferably, a sealing gasket is arranged in the ring groove.

[0015] Preferably, the inner side wall of the center hole is provided with a notch, and the first protrusion and the second protrusion can be clamped in the notch.

[0016] Preferably, a sealing ring is arranged in the notch.

[0017] Compared with the prior art, the embodiment of the utility model has the following advantages and beneficial effects:

[0018] 1. The motor rotor structure provided by the embodiment of the utility model sets a sealing protective cover, replaces the end cover at both ends of the rotor core in the prior art, the protective cover can not only fix the magnetic steel inside the rotor core by the clamping mechanism, but also can provide a sealed and isolated environment for the rotor core and the magnetic steel inside, prevent water and impurities from corroding the rotor core and the internal structure, and improve the durability of the motor rotor. In the embodiment of the utility model, the original end cover is replaced by the protective cover, and the complexity and weight of the rotor structure are not increased, the stability of the magnetic steel in the steel groove is ensured, the entire rotor structure is protected, and the motor is suitable for complex driving environment.

[0019] 2. By placing the rotor core between the cover and the cap, the sealing of the cover and the cap facilitates the sealing protection of the rotor core. The central hole facilitates the adjustment of the cover and the cap and subsequent replacement and maintenance. The gap between the shaft rod and the central hole can be sealed and limited by sealant or sealing ring, which not only ensures the sealing performance but also ensures the stability of the rotor during rotation.

[0020] 3. The threaded connection between the cover and the cap not only ensures the sealing stability of the sealing structure, but also improves the disassembly of the entire structure. The engagement of the groove in the cover with the magnet further improves the limiting stability of the magnet, preventing the magnet from moving or shaking in the steel groove when the rotor rotates. The engagement of the ring plate on the rotor core with the ring groove line of the cover can limit the rotation of the protective cover relative to the rotor core during rotor rotation. The sealing gasket in the ring groove can further improve the sealing performance of the sealing cover.

[0021] In general, the motor rotor structure provided by the embodiments of this utility model replaces the end caps at both ends of the rotor core with protective covers, and sets the magnets outward to engage with the protective covers, so as to protect the rotor core and its internal components and improve the overall rotational stability of the rotor. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the unfolded structure of the motor rotor provided in an embodiment of the present utility model;

[0024] Figure 2 A schematic diagram of the engaging structure between the rotor core and the protective cover provided in an embodiment of this utility model;

[0025] Figure 3 A schematic diagram of the locking structure between the rotor core and the protective cover provided in an embodiment of this utility model;

[0026] Figure 4 This is a top view of the motor rotor structure provided in an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the shaft structure provided in an embodiment of the present utility model;

[0028] Figure 6The structure schematic diagram of the motor rotor after assembly is provided by the embodiment of the utility model.

[0029] Markings in the drawings and corresponding component names:

[0030] Shaft rod, 2 - rotor core, 3 - steel tank, 4 - magnetic steel, 5 - protective cover, 7 - cover part, 8 - cover part, 9 - center hole, 10 - first protrusion, 11 - second protrusion, 12 - external thread, 13 - internal thread, 14 - groove, 15 - ring groove, 16 - ring piece, 18 - sealing ring. Specific embodiments

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0033] It should be noted that: similar signs 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.

[0034] In the description of the utility model, it should be noted that the terms "first", "second", "third" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance. Embodiments

[0035] As Figure 1 And Figure 6The utility model discloses a motor rotor structure, including the axle rod 1 and rotor iron core 2, its characterized in that, the axle rod 1 is through rotor iron core 2, and rotor iron core 2 is axially provided with steel groove 3, and the magnetic steel 4 is installed in steel groove 3, and the magnetic steel 4 is through rotor iron core 2, and both ends are convex to rotor iron core 2, the protective cover 5 is set up on the axle rod 1, and the protective cover 5 can seal cover rotor iron core 2 and the magnetic steel 4, and the inside of protective cover 5 is provided with the clamping mechanism, when rotor iron core 2 and the magnetic steel 4 seal cover in the protective cover 5, the magnetic steel 4 that is convex to rotor iron core 2 can be clamped with the clamping mechanism. Specifically, the axle rod 1 is as the center support of rotor, is through entire rotor iron core 2, provides the rotation center and the transmission path of force, and rotor iron core 2 can adopt the structure of the existing silicon steel sheet lamination, has multiple axial steel groove 3, these steel groove 3 are used to install the magnetic steel 4, form the magnetic field path of motor, and steel groove 3 is the groove set up in the axial direction of rotor iron core 2, is used to install the magnetic steel 4, and steel groove 3 helps to optimize the magnetic circuit, improves the magnetic field efficiency of motor. The magnetic steel 4 is installed in steel groove 3, is through rotor iron core 2, and both ends are convex, is made of permanent magnet material, is used to generate magnetic field and interact with stator magnetic field and produce the rotation torque. The protective cover 5 is set up on the axle rod 1, surrounds rotor iron core 2 and the magnetic steel 4, plays the sealing and protection function, prevents the outside impurity from entering and influences motor performance. The clamping mechanism is set up in the inside of protective cover 5, when rotor iron core 2 and the magnetic steel 4 are sealed cover in the protective cover 5, the magnetic steel 4 that is convex can be clamped with the clamping mechanism, ensures the fixation and alignment of the magnetic steel 4, prevents displacement during the motor operation. In the utility model embodiment, the protective cover 5 provides a sealed environment, prevents moisture, dust and other pollutants from entering, prolongs the service life of motor, and the clamping mechanism ensures the accurate positioning of the magnetic steel 4 on rotor iron core 2, reduces the vibration and noise in operation.

[0036] Exemplarily, as Figures 1-3As shown, the protective cover 5 includes a cover part 7 and a cover part 8, the center of the cover part 7 and the cover part 8 is respectively provided with a center hole 9, the rotating shaft rod 1 penetrates the center hole 9, the rotor core 2 is arranged between the cover part 7 and the cover part 8, and the cover part 7 and the cover part 8 can slide along the axis of the rotating shaft rod 1. Specifically, the protective cover 5 includes two parts of the cover part 7 and the cover part 8, which jointly constitute the protective structure of the rotor core 2 and the magnetic steel 4, the cover part 7 is used for being fixed on one side of the rotating shaft rod 1, surrounding and protecting the rotor core 2 and the magnetic steel 4, the cover part 8 cooperates with the cover part 7, jointly sealing the rotor core 2 and the magnetic steel 4, preventing the invasion of external pollutants, the center of the cover part 7 and the cover part 8 is respectively provided with a center hole 9, allowing the rotating shaft rod 1 to penetrate, ensuring that the rotation center of the rotor is aligned with the center of the protective cover 5, and the rotor core 2 is arranged between the cover part 7 and the cover part 8, which can ensure that the rotor core 2 is fully protected in the protective cover 5. The structure that the cover part 7 and the cover part 8 can slide along the axis of the rotating shaft rod 1 allows the cover part 7 and the cover part 8 to be finely adjusted during assembly to ensure accurate fit and sealing. If the rotor core 2 or the magnetic steel 4 needs to be maintained or replaced, the sliding function can conveniently disassemble the protective cover 5 to perform the necessary operation. The motor generates heat during operation, and the sliding ability of the cover part 7 and the cover part 8 can be used as a compensation mechanism to adapt to the size change due to thermal expansion. The cooperation of the cover part 7 and the cover part 8, together with the possible clamping mechanism, enhances the stability of the rotor structure, reduces the vibration and noise during operation, not only improves the durability and reliability of the motor rotor, but also simplifies the maintenance and repair process of the motor by providing an easy-to-maintain sliding mechanism. The structure can be applied to various application scenarios that require high protection level and long service life of the motor, such as industrial equipment, automobile engines, aerospace, etc.

[0037] As a preferred embodiment of the utility model, when the cover part 7 and the cover part 8 are closed, the connection between the center hole 9 and the rotating shaft rod 1 is sealed with sealing glue. The use of sealing glue can prevent moisture, dust and other pollutants from entering the motor through the connection between the center hole 9 and the rotating shaft rod 1, protecting the motor rotor from environmental factors. The sealing glue can adapt to different materials and shapes of the surface, forming an effective sealing layer, which can maintain good sealing effect even if there is a small unevenness or gap between the cover part 7 and the cover part 8.

[0038] Of course, in other embodiments of the utility model, a mechanical clamping method can also be used for sealing, for example, Figure 4 and Figure 5As shown, the first protrusion 10 and the second protrusion 11 are provided on the shaft rod 1, when the cover part 7 and the cap part 8 are closed, the first protrusion 10 seals the gap between the hole wall of the central hole 9 of the cover part 7 and the shaft rod 1, and the second protrusion 11 seals the gap between the hole wall of the central hole 9 of the cap part 8 and the shaft rod 1. Specifically, the first protrusion 10 and the second protrusion 11 are used to achieve the sealing between the cover part 7 and the cap part 8 and the shaft rod 1, the first protrusion 10 is responsible for sealing the gap between the hole wall of the central hole 9 of the cover part 7 and the shaft rod 1, and the second protrusion 11 is responsible for sealing the gap between the hole wall of the central hole 9 of the cap part 8 and the shaft rod 1, the protrusion provides a physical barrier to prevent contaminants from entering the motor through the gap, and the contact between the protrusion and the cover part 7 and the cap part 8 can form a tight sealing surface, enhancing the sealing effect. Preferably, the inner side wall of the central hole 9 is provided with a notch, and the first protrusion 10 and the second protrusion 11 can be engaged in the notch, that is, the inner notch 14 of the central hole 9 provides a space for the first protrusion 10 and the second protrusion 11 to engage, the first protrusion 10 can be engaged in the inner notch 14 of the central hole 9 of the cover part 7 to achieve the sealing between the cover part 7 and the shaft rod 1, and the second protrusion 11 can be engaged in the inner notch 14 of the central hole 9 of the cap part 8 to achieve the sealing between the cap part 8 and the shaft rod 1, the engagement of the protrusion and the notch can form a tight contact surface, effectively preventing the intrusion of contaminants and moisture, and the cooperation of the protrusion and the notch simplifies the assembly process, which only needs to align the cover part 7 and the cap part 8 and slide along the shaft rod 1 to the correct position to achieve engagement. Of course, a sealing ring 18 can be provided in the notch, and the inner notch 14 of the inner side wall of the central hole 9 provides a mounting space for the sealing ring 18 to ensure that the sealing ring 18 can be correctly positioned when the protrusion is engaged, and the elasticity of the sealing ring 18 enables it to tightly fit the inner wall of the protrusion and the notch, providing better sealing effect.

[0039] Further, the outer side wall of the open end of the cover part 7 is provided with an external thread 12, and the inner side wall of the cap part 8 is provided with an internal thread 13, and the internal thread 13 and the external thread 12 can lock the cap part 8 and the cover part 7 with each other. The design of the internal thread 13 and the external thread 12 allows the cover part 7 and the cap part 8 to be locked with each other by rotating action, forming a firm connection, and the threaded locking mechanism can provide uniform pressure distribution, which helps to achieve better sealing effect, and the assembly of the cover part 7 and the cap part 8 can be achieved by simple rotating action, which is easy and fast to operate, when maintenance or replacement of parts is needed, the threaded connection can be loosened by rotating the cap part 8, which facilitates disassembly, and the threaded connection allows the cover part 7 and the cap part 8 to be reassembled after disassembly, which is convenient for multiple uses. The threaded connection can maintain the close fit of the cover part 7 and the cap part 8 when subjected to vibration or impact, improving the structural stability, and if the threaded connection is damaged or worn, the cover part 7 or the cap part 8 can be replaced separately, reducing maintenance cost.

[0040] Exemplarily, as shown in FIG. 6, the cover part 7 and the cap part 8 are connected by a threaded connection, and the threaded connection is provided with a sealing ring 18, which is engaged in the inner notch 14 of the central hole 9 of the cover part 7 and the cap part 8, and the sealing ring 18 is in close contact with the inner wall of the protrusion and the notch, providing better sealing effect. Figure 2As shown, the locking mechanism includes a groove 14 provided on the inner side of the sealing surface of the cover 7. When the cover 8 is locked with the cover 7, the magnet 4 protrudes outward from one side of the cover 7 of the rotor core 2 and is inserted into the groove 14, and the side of the magnet 4 protruding outward from the cover 8 of the rotor core 2 is in contact with the bottom surface of the cover 8. The groove 14 is provided on the inner side of the sealing surface of the cover 7 to receive the protruding part of the magnet 4. When the cover 8 and the cover 7 are locked by threads, the magnet 4 is inserted into the groove 14 from one side of the cover 7. During installation, the magnet 4 can be inserted into the groove 14 first to limit its position relative to the cover 7, and then the cover 8 can be moved and rotated to achieve sealing. The other side of the magnet 4 (one side of the cover 8) fits against the bottom surface of the cover 8 to achieve fixation. The groove 14 provides a precise insertion position for the magnet 4, ensuring that the magnet 4 is correctly aligned and fixed on the rotor core 2. The cooperation between the magnet 4 and the groove 14 and the fit with the bottom surface of the cover 8 provide double fixation, enhancing the stability of the overall structure. In this embodiment of the utility model, the design of the locking thread and the locking mechanism reduces the risk of the magnet 4 becoming loose due to vibration or impact.

[0041] For example, such as Figure 3 As shown, the bottom surface of the cover 8 is provided with an annular groove 15, and the rotor core 2 is provided with an annular piece 16 on the outer periphery of one side of the cover 8. When the cover 8 is locked with the cover 7, the annular piece 16 is inserted into the annular groove 15. Specifically, the annular groove 15 on the bottom surface of the cover 8 provides space for the annular piece 16 on the rotor core 2 to be inserted. When the cover 8 and the cover 7 are locked by threads, the annular piece 16 is inserted into the annular groove 15 on the bottom surface of the cover 8 to achieve mechanical locking. This locking method ensures the correct position and stability of the rotor core 2 in the cover 8. The cooperation between the annular groove 15 and the annular piece 16 provides a firm fixing method, which enhances the overall stability of the rotor. After the annular piece 16 is inserted into the annular groove 15, the risk of displacement or loosening of the rotor core 2 due to vibration or impact is reduced. The cooperation between the annular piece 16 and the annular groove 15 helps to achieve a better sealing effect and prevent contaminants from entering. Of course, as a preferred embodiment of this utility model, a sealing gasket can be provided in the annular groove 15. The sealing gasket is a thin sheet made of a flexible material, such as rubber, silicone, or other materials with good elasticity and sealing performance. The sealing gasket can fill the tiny gap between the annular groove 15 and the rotor core 2 ring plate 16, preventing the intrusion of liquids, gases, and other contaminants. At the same time, it can absorb the small displacement caused by temperature changes, mechanical vibration, or impact, reducing the direct wear on the annular groove 15 and the ring plate 16. If the sealing gasket is worn or damaged, it can be easily removed from the annular groove 15 and replaced without replacing the entire cover 8 or the rotor core 2.

[0042] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. 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. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the present application omits the description of known components and processing technologies and processes to avoid unnecessary limitation of the present application.

Claims

1. An electric machine rotor structure comprising a shaft rod (1) and a rotor core (2), characterized in that, The rotating shaft rod (1) penetrates the rotor iron core (2), the rotor iron core (2) is axially provided with a steel slot (3), the steel slot (3) is internally provided with a magnetic steel (4), the magnetic steel (4) penetrates the rotor iron core (2), and both ends are externally protruded from the rotor iron core (2); The rotating shaft rod (1) is provided with a protective cover (5), the protective cover (5) can seal and cover the rotor iron core (2) and the magnetic steel (4), the inner side of the protective cover (5) is provided with a clamping mechanism, when the rotor iron core (2) and the magnetic steel (4) are sealed and covered in the protective cover (5), the magnetic steel (4) externally protruded from the rotor iron core (2) can be clamped with the clamping mechanism.

2. An electrical machine rotor structure according to claim 1, characterized in that The protective cover (5) comprises a cover part (7) and a cover part (8), the centers of the cover part (7) and the cover part (8) are respectively provided with a center hole (9), the rotating shaft rod (1) penetrates the center hole (9), the rotor iron core (2) is arranged between the cover part (7) and the cover part (8), and the cover part (7) and the cover part (8) can slide axially along the rotating shaft rod (1).

3. An electrical machine rotor structure according to claim 2, characterised in that When the cover part (7) and the cover part (8) are covered, the connection between the center hole (9) and the rotating shaft rod (1) is sealed by sealing glue.

4. An electrical machine rotor structure according to claim 2, characterised in that The rotating shaft rod (1) is provided with a first protrusion (10) and a second protrusion (11), when the cover part (7) and the cover part (8) are covered, the first protrusion (10) seals the gap between the hole wall of the center hole (9) of the cover part (7) and the rotating shaft rod (1), and the second protrusion (11) seals the gap between the hole wall of the center hole (9) of the cover part (8) and the rotating shaft rod (1).

5. An electrical machine rotor structure according to claim 2, characterised in that The outer side wall of the opening end of the cover part (7) is provided with an external thread (12), the inner side wall of the cover part (8) is provided with an internal thread (13), and the internal thread (13) and the external thread (12) can lock the cover part (8) and the cover part (7) with each other.

6. An electrical machine rotor structure according to claim 5, characterised in that The clamping mechanism comprises a groove (14) arranged on the inner side of the sealing surface of the cover part (7), when the cover part (8) is locked with the cover part (7), the magnetic steel (4) externally protruded from the cover part (7) on one side of the rotor iron core (2) is inserted into the groove (14), and the magnetic steel (4) externally protruded from the cover part (8) on one side of the rotor iron core (2) is attached to the bottom surface of the cover part (8).

7. An electrical machine rotor structure according to claim 6, characterised in that The bottom surface of the cover part (8) is provided with a ring groove (15), the rotor iron core (2) is provided with a ring piece (16) on the outer periphery on one side of the cover part (8), when the cover part (8) is locked with the cover part (7), the ring piece (16) is inserted into the ring groove (15).

8. An electrical machine rotor structure according to claim 7, characterised in that The ring groove (15) is provided with a sealing gasket.

9. An electrical machine rotor structure according to claim 4, characterised in that The inner side wall of the center hole (9) is internally recessed to be provided with a notch, and the first protrusion (10) and the second protrusion (11) can be clamped in the notch.

10. An electrical machine rotor structure according to claim 9, characterised in that The notch is provided with a sealing ring (18).

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