A flux leakage-free motor rotor

Abstract

The utility model relates to motor rotor technical field especially relates to a kind of anti-leakage magnetic motor rotor.Its technical scheme includes: shaft rod;Protective cover combination, it includes the first protective cover and second protective cover of the sleeve setting in the outer side of the shaft rod;Iron core, it is clamped and fixed between the first protective cover and second protective cover;Axial locking mechanism, it includes the locking piece of the shaft rod and the end cover of the locking piece screw connection;Wherein, the first protective cover is fixedly connected with the shaft rod, the second protective cover is circumferentially limited with the shaft rod by the limiting structure of mutual cooperation;The axial locking mechanism is used to the protective cover combination and the iron core is axially compressed on the shaft rod, and the locking piece is connected with the shaft rod by anti-rotation structure to realize synchronous rotation.The utility model improves motor rotor stability and performance, reduces loss, prolongs motor service life.

Description

Technical Field

[0001] This utility model relates to the field of motor rotor technology, specifically to a motor rotor that prevents leakage of magnetic flux. Background Technology

[0002] Electric motors, as indispensable power conversion devices in modern industry and daily life, play a crucial role in numerous fields, including industrial production, transportation, and household appliances. The motor rotor, as the core rotating component that enables energy conversion and power output, directly determines the overall operating efficiency, stability, and service life of the motor.

[0003] In existing motor rotor technology, the connection between the end plate and the core is generally achieved using bolts and pre-drilled holes. This connection method provides a certain degree of mechanical fixation between the end plate and the core, offering some versatility and operability. However, it also has several inherent drawbacks that cannot be ignored. Due to the inconsistent quality of bolts on the market, bolts from different manufacturers vary significantly in dimensional accuracy, material strength, and surface treatment. Even within the same batch of products, there may be individual bolts with quality deviations. When using bolts with varying quality and pre-drilled holes to install the end plate and core, polarization is highly likely to occur during the high-speed rotation of the motor rotor. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a leakage-proof magnetic motor rotor, which solves the problems mentioned in the background art.

[0005] The solution to the above-mentioned technical problems provided by this utility model is as follows: A leakage-proof motor rotor, comprising: Shaft; A protective cover assembly, comprising a first protective cover and a second protective cover sleeved on the outside of the shaft; The iron core is clamped and fixed between the first protective cover and the second protective cover; An axial locking mechanism includes a locking element that passes through the shaft and an end cap that is threadedly connected to the locking element; The first protective cover is fixedly connected to the shaft, and the second protective cover and the shaft are circumferentially limited by a mutually cooperating limiting structure; the axial locking mechanism is used to axially press the protective cover assembly and the iron core onto the shaft, and the locking member and the shaft are connected by an anti-rotation structure to achieve synchronous rotation.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the first protective cover is fixedly connected to the shaft by welding.

[0008] The beneficial effects of adopting the above-mentioned further solutions are: Welding is an extremely robust connection method that tightly integrates the first protective cover with the shaft into a single unit. This connection can withstand significant external impacts and vibrations, effectively preventing loosening or separation between the first protective cover and the shaft during prolonged high-speed motor operation. This provides a stable and reliable foundation for the entire rotor structure, ensuring the smoothness and safety of motor operation. Furthermore, welding is a relatively mature technology, simple to operate, and low-cost, making it suitable for large-scale production and application.

[0009] Furthermore, the limiting structure includes key teeth disposed on the outside of the shaft, and keyways formed inside the second protective cover and engaging with the key teeth.

[0010] The beneficial effects of adopting the above-mentioned further solutions are: The interlocking of key teeth and keyways achieves circumferential positioning between the second protective cover and the shaft. This positioning method is simple in structure yet effectively prevents the second protective cover from rotating circumferentially relative to the shaft during motor operation, ensuring the relative positional stability of all components. It avoids problems such as friction, wear, and noise caused by relative component movement, reduces energy loss, and improves motor operating efficiency and service life. Furthermore, the machining processes for key teeth and keyways are relatively mature, and precision is easily controlled, which helps ensure the accuracy and reliability of the positioning structure.

[0011] Furthermore, the locking element is a bolt, which includes an end cap, a smooth rod connected to the end cap, and an external thread provided at the end of the smooth rod.

[0012] The beneficial effects of adopting the above-mentioned further solutions are: Designing the locking element as a bolt offers numerous advantages. The end cap allows for easy rotation by the operator, facilitating tightening and loosening of the bolt. The smooth rod section ensures sufficient strength and rigidity for the bolt as it passes through the shaft, preventing deformation. The external thread at the end of the smooth rod allows for precise threaded connection with the threaded hole on the end cap. By rotating the end cap, the axial clamping force on the protective cover assembly and the iron core can be easily adjusted, ensuring a tight fit between components and preventing axial loosening or separation during high-speed motor rotation or external impacts. This improves the overall stability and reliability of the rotor structure.

[0013] Furthermore, the anti-rotation structure includes a notch at one end of the shaft and a fixing hole on the locking member; the anti-rotation structure also includes a pin that passes through the fixing hole and the notch to prevent the locking member from rotating relative to the shaft.

[0014] The beneficial effects of adopting the above-mentioned further solutions are: This anti-rotation structure is ingeniously and effectively designed. A notch is made at one end of the shaft, a fixing hole is provided on the locking element, and a pin passes through both, reliably preventing relative rotation between the locking element and the shaft. During motor operation, this anti-rotation structure ensures that the locking element and the shaft always rotate synchronously, avoiding problems such as friction, vibration, and noise caused by differences in their speeds. It reduces mechanical stress on components and extends the service life of the motor rotor. Furthermore, the pin is relatively easy to install and remove, facilitating maintenance and replacement of components when necessary.

[0015] Furthermore, a threaded hole is provided through the end cap, and the end cap engages with the external thread at the end of the locking member through the threaded hole.

[0016] The beneficial effects of adopting the above-mentioned further solutions are: A threaded hole is provided on the end cap, which engages with the external thread at the end of the locking component, forming a simple yet effective axial locking mechanism. By rotating the end cap, the axial clamping force on the protective cover assembly and the iron core can be precisely controlled, ensuring that all components fit tightly together. This threaded connection method is self-locking, maintaining a stable clamping state during motor operation and preventing components from loosening. Moreover, the thread processing technology is mature and highly precise, ensuring the reliability and stability of the connection. Simultaneously, this connection method facilitates disassembly and installation, which is beneficial for motor maintenance and repair.

[0017] Furthermore, the iron core and the second protective cover are fixed to the shaft by the clamping action of the first protective cover and the end cover.

[0018] The beneficial effects of adopting the above-mentioned further solutions are: The iron core and second protective cover are fixed to the shaft by the clamping action of the first protective cover and the end cover, forming a tight, integrated structure. This fixing method generates sufficient pressure to create a good sealing environment between the iron core and surrounding components, effectively reducing magnetic flux leakage paths and improving the motor's magnetic field utilization and output performance. Simultaneously, the tight clamping structure prevents the iron core and second protective cover from loosening or shifting when the motor rotates at high speed or is subjected to external impacts, ensuring the dynamic balance and stable operation of the motor rotor. Furthermore, this fixing method is simple in structure, easy to install, and beneficial for improving production efficiency and reducing costs.

[0019] This utility model provides a leakage-proof motor rotor. It has the following beneficial effects: The first protective cover is fixed to the shaft by welding. This connection method is strong and reliable, able to withstand large external forces without easily loosening, providing a stable foundation support for the entire rotor structure. The second protective cover is circumferentially limited to the shaft through a keyway and keyway matching structure. This effectively prevents the second protective cover from rotating circumferentially relative to the shaft during motor operation, ensuring the relative position stability between components and avoiding friction, wear, and noise problems caused by relative component movement, thus improving the overall stability and reliability of the rotor structure. The axial locking mechanism uses a locking element (bolt) that passes through the shaft and an end cap threaded to the locking element to axially press the protective cover assembly and the iron core onto the shaft. This axial pressing method can generate sufficient pressure to ensure a tight fit between the components, preventing axial loosening or separation between components when the motor rotates at high speed or is subjected to external impact, further enhancing the overall stability of the rotor structure and ensuring long-term stable operation of the motor.

[0020] The iron core is clamped and fixed between the first and second protective covers, and is firmly secured to the shaft by the clamping action of the end caps and the first protective cover. This tight clamping structure creates a good sealing environment between the iron core and surrounding components, reducing the leakage path of magnetic flux. During motor operation, it effectively prevents the magnetic field from leaking out from the edges of the iron core or other gaps, improving the magnetic field utilization rate of the motor and enhancing its output performance and efficiency. The structural design of the entire anti-leakage magnetic motor rotor takes into account the distribution and conduction characteristics of the magnetic field, and the connection and fixing methods between various components help to form a relatively closed magnetic field loop. The shaft, protective cover assembly, and iron core work together to guide and constrain the propagation direction of the magnetic field, reducing magnetic field scattering and loss, further improving the anti-leakage magnetic effect, and enabling the motor to utilize magnetic field energy more efficiently during operation.

[0021] The locking element and shaft are connected by an anti-rotation structure to achieve synchronous rotation. Specifically, a notch is made at one end of the shaft, a fixing hole is provided on the locking element, and a pin passes through the fixing hole and the notch to prevent relative rotation between the locking element and the shaft. This anti-rotation structure is simple and effective, ensuring that the locking element and shaft always rotate synchronously during motor operation, avoiding problems such as friction, vibration, and noise caused by different speeds, and improving the smoothness of motor rotor operation. Because the components are tightly fitted through reasonable connection and fixing methods, the shaft can drive the first protective cover, second protective cover, iron core, and locking element to rotate synchronously during motor startup and operation. This overall transmission coordination allows the motor rotor to maintain stable dynamic balance during high-speed rotation, reducing mechanical stress caused by asynchronous component operation, extending the service life of the motor rotor, and also improving the motor's working efficiency and performance. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0023] In the attached diagram: Figure 1 This is a front view schematic diagram of the present invention; Figure 2 This is a rear view schematic diagram of the present utility model; Figure 3 This is a front-view exploded view of the present invention. Figure 4 This is a schematic diagram of the rear-view explosion structure of this utility model.

[0024] The attached diagram lists the components represented by each number as follows: 1. Pin; 2. Locking component; 201. Fixing hole; 202. End cap; 203. Smooth rod; 204. External thread; 3. First protective cover; 301. Keyway; 4. Shaft; 401. Notch; 402. Key tooth; 5. Second protective cover; 6. End cap; 601. Threaded hole; 7. Iron core. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1 to 4 As shown, the embodiments provided by this utility model are as follows: Example

[0027] A leakage-proof motor rotor, comprising: Shaft 4; The protective cover assembly includes a first protective cover 3 and a second protective cover 5 sleeved on the outside of the shaft 4; The iron core 7 is clamped and fixed between the first protective cover 3 and the second protective cover 5; An axial locking mechanism includes a locking member 2 that passes through the shaft 4 and an end cap 6 that is threadedly connected to the locking member 2; The first protective cover 3 is fixedly connected to the shaft 4, and the second protective cover 5 and the shaft 4 are circumferentially limited by a mutually cooperating limiting structure; the axial locking mechanism is used to axially press the protective cover assembly and the iron core 7 onto the shaft 4, and the locking member 2 and the shaft 4 are connected by an anti-rotation structure to achieve synchronous rotation. Example

[0028] To further optimize the connection stability between the first protective cover and the shaft, for example, such as Figures 1 to 4 As shown, this utility model also includes: The first protective cover 3 and the shaft 4 are fixedly connected by welding. Welding is an extremely strong connection method that tightly binds the first protective cover 3 and the shaft 4 into a single unit. This connection method can withstand significant external impacts and vibrations. During long-term high-speed operation of the motor, it effectively prevents the first protective cover 3 and the shaft 4 from loosening or separating, thus providing a stable and reliable foundation support for the entire rotor structure and ensuring the smoothness and safety of motor operation. Furthermore, welding is a relatively mature technology, simple to operate, and low in cost, which is conducive to large-scale production and application.

[0029] The limiting structure includes key teeth 402 located on the outside of the shaft 4, and a keyway 301 located inside the second protective cover 5 and engaging with the key teeth 402. The engagement of the key teeth 402 and the keyway 301 achieves circumferential limiting between the second protective cover 5 and the shaft 4. This limiting method is simple in structure yet effectively prevents the second protective cover 5 from rotating circumferentially relative to the shaft 4 during motor operation, ensuring the relative position stability between components. It avoids friction, wear, and noise problems caused by relative component movement, reduces energy loss, and improves motor operating efficiency and service life. Furthermore, the machining processes for the key teeth 402 and the keyway 301 are relatively mature, and their precision is easy to control, which helps ensure the accuracy and reliability of the limiting structure. Example

[0030] To improve the ease of operation and reliability of the axial locking mechanism, for example, such as Figures 1 to 4 As shown, this utility model also includes: The locking component 2 is a bolt, comprising an end cap 202, a smooth rod 203 connected to the end cap 202, and an external thread 204 at the end of the smooth rod 203. Designing the locking component 2 as a bolt offers several advantages. The end cap 202 allows for easy rotation by the operator, facilitating tightening and loosening of the bolt. The smooth rod 203 ensures sufficient strength and rigidity for the bolt as it passes through the shaft 4, preventing deformation. The external thread 204 at the end of the smooth rod 203 allows for precise threaded connection with the threaded hole 601 on the end cover 6. By rotating the end cover 6, the axial clamping force on the protective cover assembly and the iron core 7 can be easily adjusted, ensuring a tight fit between components and preventing axial loosening or separation during high-speed motor rotation or external impact, thereby improving the overall stability and reliability of the rotor structure.

[0031] A threaded hole 601 is provided through the end cover 6. The end cover 6 engages with the external thread 204 at the end of the locking member 2 through the threaded hole 601, forming a simple and effective axial locking mechanism. By rotating the end cover 6, the axial clamping force on the protective cover assembly and the iron core 7 can be precisely controlled, ensuring that all components fit tightly together. This threaded connection method has self-locking properties, maintaining a stable clamping state during motor operation and preventing components from loosening. Moreover, the thread processing technology is mature and highly precise, ensuring the reliability and stability of the connection. Simultaneously, this connection method facilitates disassembly and installation, which is beneficial for motor maintenance and repair. Example

[0032] To ensure the synchronous rotation performance of the locking element and the shaft, for example, such as Figures 1 to 4 As shown, this utility model also includes: The anti-rotation structure includes a notch 401 at one end of the shaft 4 and a fixing hole 201 on the locking member 2. The anti-rotation structure also includes a pin 1, which passes through the fixing hole 201 and the notch 401 to prevent relative rotation between the locking member 2 and the shaft 4. This anti-rotation structure is ingeniously and effectively designed. By creating a notch 401 at one end of the shaft 4, providing a fixing hole 201 on the locking member 2, and having the pin 1 pass through both, relative rotation between the locking member 2 and the shaft 4 can be reliably prevented. During motor operation, this anti-rotation structure ensures that the locking member 2 and the shaft 4 always rotate synchronously, avoiding problems such as friction, vibration, and noise caused by differences in their speeds. It reduces mechanical stress damage to components and extends the service life of the motor rotor. Furthermore, the pin 1 is relatively easy to install and remove, facilitating maintenance and replacement of components when necessary. Example

[0033] To enhance the fixing effect of the iron core and the second protective cover, as well as the anti-magnetic leakage performance of the motor, for example, such as Figures 1 to 4 As shown, this utility model also includes: The iron core 7 and the second protective cover 5 are fixed to the shaft 4 by the clamping action of the first protective cover 3 and the end cover 6, forming a tight, integrated structure. This fixing method generates sufficient pressure to create a good sealing environment between the iron core 7 and surrounding components, effectively reducing magnetic flux leakage paths and improving the magnetic field utilization and output performance of the motor. Simultaneously, the tight clamping structure prevents the iron core 7 and the second protective cover 5 from loosening or shifting when the motor rotates at high speed or is subjected to external impact, ensuring the dynamic balance and stable operation of the motor rotor. Furthermore, this fixing method is simple in structure, easy to install, and beneficial for improving production efficiency and reducing costs.

[0034] Working principle: The first protective cover 3 is welded and fixed to the shaft 4. At this time, the first protective cover 3 and the shaft 4 are closely connected to form a stable basic connection structure, providing a positioning and fixing foundation for the installation of subsequent components.

[0035] The iron core 7 is placed on the first protective cover 3, and then the second protective cover 5 is fitted onto the outside of the shaft 4. The key teeth 402 on the outside of the shaft 4 are engaged with the keyway 301 inside the second protective cover 5. This limiting structure achieves circumferential limiting between the second protective cover 5 and the shaft 4, preventing the second protective cover 5 from rotating circumferentially relative to the shaft 4 during motor operation and ensuring the relative position stability of each component. At this time, the iron core 7 is clamped between the first protective cover 3 and the second protective cover 5.

[0036] A bolt serving as the locking element 2 is inserted through the shaft 4. The bolt includes an end cap 202, a smooth rod 203 connected to the end cap 202, and an external thread 204 at the end of the smooth rod 203. Next, a pin 1 is inserted into the notch 401 at one end of the shaft 4 and the fixing hole 201 on the locking element 2. The pin 1 passes through the fixing hole 201 and the notch 401, preventing relative rotation between the locking element 2 and the shaft 4, thus achieving synchronous rotation between the locking element 2 and the shaft 4. This prevents the locking element 2 from loosening during motor operation and affecting the overall structural stability. Then, the end cover 6 is engaged with the external thread 204 at the end of the locking element 2 through its threaded hole 601. By rotating the end cover 6, the threaded connection axially presses the protective cover assembly and the iron core 7 onto the shaft 4, ensuring that the iron core 7 and the second protective cover 5 are firmly fixed to the shaft 4 by the clamping action of the first protective cover 3 and the end cover 6, guaranteeing that no axial loosening occurs in the motor rotor during operation.

[0037] When the motor starts, shaft 4 drives the entire rotor structure to rotate. Since the components are tightly connected by the above-mentioned fixing, limiting and anti-rotation structures, it can be ensured that the iron core 7, protective cover assembly and other components rotate synchronously with shaft 4 during the high-speed rotation of the motor rotor, and there will be no leakage of magnetism, so as to achieve stable and efficient operation of the motor.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A leakage-proof magnetic motor rotor, characterized in that, include: Shaft (4); The protective cover assembly includes a first protective cover (3) and a second protective cover (5) sleeved on the outside of the shaft (4). The iron core (7) is clamped and fixed between the first protective cover (3) and the second protective cover (5); An axial locking mechanism includes a locking element (2) that passes through the shaft (4) and an end cap (6) that is threadedly connected to the locking element (2). The first protective cover (3) is fixedly connected to the shaft (4), and the second protective cover (5) and the shaft (4) are circumferentially limited by a mutually cooperating limiting structure; the axial locking mechanism is used to axially press the protective cover assembly and the iron core (7) onto the shaft (4), and the locking member (2) and the shaft (4) are connected by an anti-rotation structure to achieve synchronous rotation.

2. The anti-leakage magnet motor rotor according to claim 1, characterized in that: The first protective cover (3) and the shaft (4) are fixedly connected by welding.

3. The anti-leakage magnet motor rotor according to claim 1, characterized in that: The limiting structure includes key teeth (402) disposed on the outside of the shaft (4) and key grooves (301) opened inside the second protective cover (5) and engaging with the key teeth (402).

4. The anti-leakage magnet motor rotor according to claim 1, characterized in that: The locking element (2) is a bolt, which includes an end cap (202), a smooth rod (203) connected to the end cap (202), and an external thread (204) provided at the end of the smooth rod (203).

5. The anti-leakage magnet motor rotor according to claim 1, characterized in that: The anti-rotation structure includes a notch (401) at one end of the shaft (4) and a fixing hole (201) on the locking member (2); the anti-rotation structure also includes a pin (1) that passes through the fixing hole (201) and the notch (401) to prevent the locking member (2) from rotating relative to the shaft (4).

6. The anti-leakage magnet motor rotor according to claim 1, characterized in that: The end cap (6) has a through threaded hole (601), and the end cap (6) engages with the external thread (204) at the end of the locking member (2) through the threaded hole (601).

7. The anti-leakage magnet motor rotor according to claim 1, characterized in that: The iron core (7) and the second protective cover (5) are fixed on the shaft (4) by the clamping action of the first protective cover (3) and the end cover (6).

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