Boss positioning type shaded pole motor end cover structure

Abstract

The utility model relates to the technical field of motor end cover structures, in particular to a boss positioning type shaded pole motor end cover structure, which comprises a square end cover main body, and is characterized in that four corners of the square end cover main body are subjected to rounding treatment, the chamfering radius R of the rounding treatment is 1 / 10 of the side length of the square end cover main body, a cylindrical boss is arranged in the center of the top of the square end cover main body, and the boss positioning type shaded pole motor end cover structure is arranged on the square end cover main body. The center of the top of the cylindrical boss is provided with a bearing installation position, the circumference of the cylindrical boss is uniformly provided with installation holes, and according to the boss positioning type shaded pole motor end cover structure designed by the application, through geometric optimization, heat dissipation enhancement, anti-loosening and anti-vibration and maintainability design, the comprehensive performance of a motor is remarkably improved. The four corners of the square end cover are subjected to rounding treatment to reduce stress concentration, and the radial reinforcing ribs are matched to greatly improve the deformation resistance, so that the motor is still kept in a stable structure during high-speed operation or load fluctuation; and the cylindrical boss and the bearing mounting position are in high-concentricity fit.

Description

Technical Field

[0001] This utility model relates to the technical field of motor end cover structure, and in particular to a boss-positioned shaded pole motor end cover structure. Background Technology

[0002] Shaded-pole motors, as simple and inexpensive single-phase induction motors, are widely used in household appliances, small mechanical equipment, and automated control systems. Their end cap structure directly affects the motor's assembly accuracy, heat dissipation performance, and long-term operational stability. Traditional shaded-pole motor end caps often employ a simple flat design, which suffers from insufficient heat dissipation, low structural strength, and poor installation and positioning accuracy. This leads to problems such as bearing wear, end cap deformation, and increased vibration and noise after prolonged operation. Furthermore, existing end caps lack effective anti-loosening and lubrication maintenance designs, further reducing the motor's reliability and lifespan.

[0003] Chinese patent discloses a shaded-pole motor end cover (publication number: CN 202749935 U) including a front end cover and a rear end cover. The front end cover is provided with a bearing seat for connecting to the rotor of the shaded-pole motor. The bearing seat penetrates the inner and outer surfaces of the front end cover. The inner surface of the front end cover is provided with multiple first reinforcing ribs. The rear end cover is provided with a cable inlet hole for the cable to pass through. The inner surface of the rear end cover is provided with multiple second reinforcing ribs. However, this motor end cover structure has obvious deficiencies in terms of heat dissipation, deformation resistance, assembly accuracy and maintainability, and it is difficult to meet the requirements of high-precision and long-life motors. Therefore, a boss-positioned shaded-pole motor end cover structure is needed. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing motor end cover structures in terms of heat dissipation, deformation resistance, assembly precision, and maintainability, which make it difficult to meet the requirements of high-precision and long-life motors. Therefore, a boss-positioned shaded-pole motor end cover structure is proposed.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The utility model discloses a boss-positioned shaded-pole motor end cover structure, comprising a square end cover body. Its features include: rounded corners at all four corners of the square end cover body, with a rounding radius R equal to 1 / 10 of the side length of the square end cover body; a cylindrical boss at the top center of the square end cover body; a bearing mounting position at the top center of the cylindrical boss; and four mounting holes evenly distributed around the circumference of the cylindrical boss, arranged diagonally. Structural stability: The rounded corners of the square end cover avoid stress concentration, improve overall strength, and reduce the risk of impact during assembly; Precise positioning: The cylindrical boss, in conjunction with the bearing mounting position, ensures the concentricity of the motor bearings, improving the smoothness of motor operation; Uniform force distribution: The four diagonally distributed mounting holes ensure balanced force distribution on the end cover, preventing deformation or loosening caused by uneven force on one side.

[0006] Preferably, the cylindrical boss has 6 to 8 reinforcing ribs radially distributed on its back side. The roots of the reinforcing ribs begin 5 mm from the outer side of the cylindrical boss and extend to the edge of the square end cap body. The radial reinforcing ribs effectively disperse stress, preventing deformation of the end cap due to vibration or load during motor operation. The ribs extending to the edge of the end cap form a stable support frame, reducing slight vibrations of the end cap during high-speed operation. The reinforcing ribs also assist in heat conduction, further improving heat dissipation efficiency in conjunction with subsequent heat dissipation design.

[0007] Preferably, the outer edge of the square end cap body is provided with stepped heat dissipation teeth, the step difference of which is 1.5mm. The top of the square end cap body is provided with hollowed-out heat dissipation holes, the diameter of which is 2mm and the structure is fan-shaped. The stepped heat dissipation teeth increase the heat dissipation surface area, accelerate airflow, and improve the efficiency of natural convection heat dissipation; the fan-shaped heat dissipation holes form a directional airflow channel, promoting the discharge of internal heat and preventing heat accumulation; the hollowed-out structure reduces the weight of the end cap while ensuring heat dissipation performance, thereby reducing the overall load on the motor.

[0008] Preferably, the mounting hole is provided with an anti-loosening washer, which is made of high-temperature resistant nylon material. The nylon washer maintains its elasticity even at high temperatures, effectively preventing bolt loosening caused by motor vibration; the nylon material has good wear resistance, and long-term use will not cause deformation or failure of the mounting hole due to friction; the nylon washer provides a certain degree of electrical insulation, reducing the risk of electrochemical corrosion between the end cap and other motor components.

[0009] Preferably, the square end cap body has a threaded oil filling hole on its side, and the oil filling hole is equipped with a removable sealing plug. The oil filling hole allows for the replenishment of lubricating grease without removing the end cap, extending the bearing's service life; the removable plug ensures that the oil filling hole remains sealed in a non-maintenance state, preventing dust or foreign objects from entering the motor; different lubrication schemes can be selected according to the motor's operating environment, improving the motor's adaptability to harsh operating conditions.

[0010] Preferably, the top edge of the cylindrical boss is provided with a positioning hole, the positioning hole having a diameter of 3mm. The positioning hole can serve as an installation reference, ensuring precise alignment between the end cover and the motor housing, thus improving assembly efficiency; the positioning hole facilitates gripping by robotic arms or fixtures, making it suitable for rapid assembly on automated production lines; during maintenance or replacement of the end cover, the positioning hole can help with quick calibration, preventing installation deviations from affecting motor performance.

[0011] The advantages of this utility model are:

[0012] The boss-positioned shaded-pole motor end cover structure designed in this application significantly improves the overall performance of the motor through geometric optimization, enhanced heat dissipation, anti-loosening and vibration resistance, and maintainability design. The rounded corners of the square end cover reduce stress concentration, and the radial reinforcing ribs greatly enhance resistance to deformation, ensuring the motor maintains structural stability even under high-speed operation or load fluctuations. The cylindrical boss forms a highly concentric fit with the bearing mounting position, and the diagonally distributed mounting holes distribute stress evenly. Combined with edge positioning holes, it enables quick and precise assembly, reducing the difficulty of manual adjustment. The stepped heat dissipation teeth increase the heat dissipation area, and the fan-shaped perforations promote air convection, effectively controlling motor temperature rise and preventing magnetic performance degradation or insulation aging due to overheating. High-temperature resistant nylon anti-loosening washers suppress bolt loosening caused by vibration, and the removable oil injection hole facilitates regular lubrication and maintenance, extending the overall lifespan of the bearings and motor. The perforated structure reduces weight, and the stepped heat dissipation teeth and positioning hole design are compatible with automated production, making it suitable for large-scale, high-efficiency manufacturing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0016] In the diagram: 1. Hollowed-out heat dissipation holes; 2. Positioning holes; 3. Cylindrical boss; 4. Square end cap body; 5. Reinforcing ribs; 6. Mounting holes; 7. Anti-loosening washers; 8. Stepped heat dissipation teeth; 9. Bearing mounting position; 10. Plug. Detailed Implementation

[0017] 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 scope of protection of the present utility model.

[0018] Example

[0019] Please see Figure 1-2 As shown, a boss-positioned shaded-pole motor end cover structure includes a square end cover body 4. The square end cover body 4 has rounded corners at all four corners, with a rounding radius R equal to 1 / 10 of the side length of the square end cover body 4. A cylindrical boss 3 is located at the center of the top of the square end cover body 4. A bearing mounting position 9 is located at the center of the top of the cylindrical boss 3. A temperature sensor mounting groove is located on one side of the bearing mounting position 9. Mounting holes 6 are evenly distributed around the circumference of the cylindrical boss 3, with four holes 6 arranged diagonally. Structural stability: The rounded corners of the square end cover avoid stress concentration, improve overall strength, and reduce the risk of impact during assembly. Precise positioning: The cylindrical boss 3, in conjunction with the bearing mounting position 9, ensures the concentricity of the motor bearings, improving the smoothness of motor operation. Uniform force distribution: The four diagonally distributed mounting holes 6 ensure even force distribution on the end cover, preventing deformation or loosening caused by uneven force on one side.

[0020] In this embodiment, the cylindrical boss 3 has 6 to 8 reinforcing ribs radiating outwards on its back side. The roots of the reinforcing ribs 5 start 5 mm from the outer side of the cylindrical boss and extend to the edge of the square end cover body 4. The radial reinforcing ribs 5 effectively disperse stress and prevent the end cover from deforming due to vibration or load during motor operation. The reinforcing ribs 5 extend to the edge of the end cover, forming a stable support frame and reducing the slight vibration of the end cover during high-speed operation. The reinforcing ribs 5 can also assist in heat conduction, further improving heat dissipation efficiency in conjunction with subsequent heat dissipation design.

[0021] In this embodiment, the outer edge of the square end cap body 4 is provided with stepped heat dissipation teeth 8, the step difference of the stepped heat dissipation teeth 8 is 1.5mm, and the top of the square end cap body 4 is provided with a hollow heat dissipation hole 1, the hollow heat dissipation hole 1 has a diameter of 2mm and a fan-shaped structure. The stepped heat dissipation teeth 8 increase the heat dissipation surface area, accelerate air flow, and improve the efficiency of natural convection heat dissipation; the fan-shaped heat dissipation hole forms a directional airflow channel, promotes the discharge of internal heat, and avoids heat accumulation; the hollow structure reduces the weight of the end cap while ensuring heat dissipation performance, thereby reducing the overall load on the motor.

[0022] In this embodiment, an anti-loosening washer 7 is provided on the mounting hole 6, and the anti-loosening washer 7 is made of high-temperature resistant nylon material. The nylon washer can still maintain elasticity in high-temperature environments, effectively preventing bolt loosening caused by motor vibration; the nylon material has good wear resistance, and the mounting hole 6 will not deform or fail due to friction after long-term use; the nylon washer can provide a certain degree of electrical insulation performance, reducing the risk of electrochemical corrosion between the end cover and other parts of the motor.

[0023] In this embodiment, the square end cap body 4 has a threaded oil injection hole on its side, and a removable sealing plug 10 is provided on the oil injection hole. The oil injection hole allows lubricating grease to be added without removing the end cap, extending the bearing service life; the removable plug 10 ensures that the oil injection hole remains sealed in the non-maintenance state, preventing dust or foreign objects from entering the motor; different lubrication schemes can be selected according to the motor operating environment, improving the motor's adaptability to harsh operating conditions.

[0024] In this embodiment, the top edge of the cylindrical boss 3 is provided with a positioning hole 2, the positioning hole 2 having a diameter of 3mm. The positioning hole 2 can serve as an installation reference, ensuring precise alignment between the end cover and the motor housing, thus improving assembly efficiency; the positioning hole 2 facilitates gripping by robotic arms or fixtures, making it suitable for rapid assembly on automated production lines; during maintenance or replacement of the end cover, the positioning hole 2 can help with rapid calibration, preventing installation deviations from affecting motor performance.

[0025] The implementation principle of this embodiment is as follows:

[0026] The cylindrical boss 3 serves as the core positioning reference, and through precise matching with the motor bearing, it ensures that the rotor always maintains high-precision alignment in the axial and radial directions; the mounting holes 6 distributed diagonally at the four corners, together with high-strength bolts, form a rigid connection with the motor housing, effectively suppressing the transmission of vibration during motor operation and improving the overall structural stability.

[0027] Radial reinforcing ribs 5 extend from the root of the boss to the edge of the end cover, forming a mesh support structure that evenly distributes the radial load transmitted by the bearing to the entire end cover, avoiding local fatigue cracks caused by stress concentration and significantly extending the service life of the end cover.

[0028] The internal heat generated by the motor is quickly conducted to the end cover body through the boss. The stepped heat dissipation teeth 8 enhance the natural convection effect by increasing the heat dissipation surface area. Together with the directional airflow channel formed by the fan-shaped hollow hole at the top, a highly efficient passive heat dissipation system is constructed to ensure that the motor temperature rise is always within a safe range.

[0029] The high-temperature resistant nylon anti-loosening washer 7 maintains stable elasticity under continuous vibration conditions, providing a lasting preload for bolted connections and completely eliminating the risk of loosening; the side wall oil injection hole design supports lubrication maintenance without disassembly, and the regular replenishment of grease significantly reduces bearing wear, ensuring long-term low-noise and stable operation of the motor.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A salient pole motor end shield structure comprising a square end shield body (4) characterised in that : The square end cover body (4) is chamfered at four corners, and the chamfer radius R is 1 / 10 of the side length of the square end cover body (4); the square end cover body (4) is provided with a cylindrical boss (3) at the top center; the cylindrical boss (3) is provided with a bearing mounting position (9) at the top center; the cylindrical boss (3) is provided with mounting holes (6) uniformly distributed on the circumference; the mounting holes (6) are four in number and are arranged diagonally.

2. The salient pole motor end shield structure of claim 1, wherein: The cylindrical boss (3) is provided with reinforcing ribs (5) radially distributed on the back; the reinforcing ribs (5) are 6-8 in number; the reinforcing ribs (5) start from the outside of the cylindrical boss 5mm and extend to the edge of the square end cover body (4).

3. The salient pole motor end shield structure of claim 1, wherein: The outer wall of the square end cover body (4) is provided with stepped heat dissipation teeth (8) at the outer edge; the stepped heat dissipation teeth (8) have a step difference of 1.5mm; the square end cover body (4) is provided with a hollow heat dissipation hole (1) at the top; the hollow heat dissipation hole (1) has a diameter of 2mm and a structure of a fan-shaped hole.

4. The salient pole motor end turn structure of claim 1, wherein: The mounting hole (6) is provided with a lock washer (7); the lock washer (7) is made of high-temperature-resistant nylon material.

5. The salient pole motor end turn structure of claim 1, wherein: The square end cover body (4) is provided with a threaded oil injection hole on the side; the oil injection hole is provided with a detachable sealing plug (10).

6. The salient pole motor end turn structure of claim 1, wherein: The cylindrical boss (3) is provided with a positioning hole (2) at the top edge; the positioning hole (2) has a diameter of 3mm.

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