Motor end cover structure of electric fan

Abstract

The invention relates to a motor end cover structure of an electric fan, which comprises an end cover, a first accommodating cavity is concavely formed in the middle of the inner side of the end cover, a bearing is mounted in the first accommodating cavity, the end cover is integrally formed by punch forming, the middle of the inner side of the end cover protrudes upwards to form a first boss, and the first boss is formed on the periphery of the first accommodating cavity. The first boss is covered with an elastic gland, the elastic gland is integrally formed in a punch forming mode, the elastic gland comprises an annular connecting part and a second boss located at the upper end of the annular connecting part, and a through hole used for containing a bearing and enabling the bearing to penetrate out of the second boss is formed in the middle of the upper end of the second boss. A plurality of elastic pieces are formed on the second boss in the circumferential direction of the periphery of the through hole at equal intervals, the elastic pieces extend towards the through hole, tilt upwards and are tightly pressed at the upper end of the bearing, and a plurality of clamping hooks used for clamping and fixing the annular connecting part are arranged on the inner side of the end cover in the circumferential direction of the periphery of the first boss. According to the scheme, the elastic gland and the end cover which are integrally punched and formed ensure that the axis of the motor is accurately aligned with a bearing hole.

Description

Technical Field

[0001] The invention relates to the field of electric fan accessories, and in particular to a motor end cover structure of an electric fan. Background Art

[0002] With the advancement of technology and the improvement of consumers' requirements for product quality, electric fans, as one of the indispensable household appliances in daily life, have received more and more attention for their performance and service life. As the core component of electric fans, the stability and efficiency of the motor directly affect the performance of the entire product. The motor end cover is a key component in the motor. It not only supports the structure of the motor, but also plays an important role in protecting the internal components and ensuring the smooth operation of the motor.

[0003] In the existing electric fan motor end cover design, a four-component combination structure consisting of an end cover, an oil cover, a bearing and a spring is generally used. Among them, the spring is an independent component that is stamped and formed after heat treatment. Its main function is to apply appropriate preload to the bearing during the operation of the motor to ensure that the bearing is always in a stressed state, thereby maintaining the stable rotation of the motor shaft. However, this traditional multi-component combination has some obvious shortcomings.

[0004] Since the shrapnel and the oil cap are two independent parts, it is difficult to achieve a perfect match between their installation positions, which results in the motor axis and the bearing hole on the end cover not being completely aligned, the so-called "misalignment" phenomenon. Misalignment will increase the friction resistance of the motor during operation, reduce the motor efficiency, and may even cause premature damage to the motor. The assembly process of multiple parts is relatively cumbersome, which not only increases the manufacturing cost, but also increases the error rate in the production process, affecting the overall quality of the product.

[0005] Multiple components used in traditional designs need to be processed and assembled separately, which not only prolongs the production cycle, but also increases material consumption and labor costs.

[0006] Therefore, the present invention proposes an innovative integrated design, which combines the oil cover and the spring into one, and achieves a close combination of the two through a one-time stamping process to overcome the defects of the above-mentioned prior art. Summary of the invention

[0007] The present invention overcomes the deficiencies of the above-mentioned technology and provides a motor end cover structure of an electric fan.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A motor end cover structure of an electric fan comprises an end cover, a first accommodating cavity is recessed in the middle inner side of the end cover, a bearing is installed in the first accommodating cavity, and the characteristics are: the end cover is made by integral stamping, a first boss is protruded upward in the middle inner side of the end cover, the first boss is formed on the outer periphery of the first accommodating cavity, an elastic pressure cover is covered on the first boss, the elastic pressure cover is made by integral stamping, the elastic pressure cover comprises an annular connecting portion and a second boss located at the upper end of the annular connecting portion, a through hole is provided in the middle upper end of the second boss for accommodating the bearing and allowing the bearing to pass through the second boss, a plurality of spring sheets are formed on the second boss at equal distances along the circumference of the through hole, the spring sheets extend toward the through hole, warp upward and are pressed tightly on the upper end of the bearing, and a plurality of hooks for clamping the annular connecting portion are provided on the inner side of the end cover along the circumference of the first boss.

[0010] Furthermore, the diameter of the annular connecting portion is larger than the diameters of the first boss and the second boss, and the inner circle diameter of the second boss is larger than the outer circle diameter of the first boss.

[0011] Furthermore, an isolation groove is formed between adjacent spring sheets to separate the adjacent spring sheets.

[0012] Furthermore, the spring sheet includes a parallel end parallel to the top end surface of the second boss and a raised end extending from the parallel end into the through hole and raised upward, and an angle a is formed between the raised end and the parallel end, and the angle a is 100°-150°.

[0013] Furthermore, the middle portion of the inner side of the upper end of the second boss is recessed downward to form a third boss, and the spring sheet is arranged on the third boss.

[0014] Furthermore, the bearing is an oil-containing bearing, a shaft hole for allowing the motor shaft to pass through is formed in the middle of the bearing, and the bearing also includes an oil storage portion circumferentially arranged outside the shaft hole.

[0015] Furthermore, the diameter of the oil-containing bearing is 6mm-12mm.

[0016] Furthermore, a plurality of heat dissipation holes are equidistantly formed on the end cover along the outer circumference of the first boss.

[0017] Furthermore, the number of the spring pieces is 6-14.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] Compared with the existing technology, this case combines the oil cover and the spring into one to form an elastic pressure cover, and achieves a close combination of the two through a one-time stamping process. The elastic pressure cover and end cover with integrated stamping design ensure the precise alignment of the motor axis and the bearing hole, and improve the smoothness and efficiency of the motor operation. This case reduces the original three independent components to two, greatly simplifies the assembly steps, reduces the complexity and error probability in the production process, improves production efficiency, and enhances the stability of the motor end cover structure. The integrated stamping elastic pressure cover and end cover not only reduce the types and quantities of raw materials required, but also shorten the production cycle, reduce labor input, and effectively reduce the overall production cost. The integrated stamping elastic pressure cover and end cover are more stable when subjected to external forces, can better maintain the preload of the bearing, and improve the reliability of the long-term operation of the motor. The design of the spring improves the stability of the bearing, reduces the vibration and noise during the operation of the motor, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a disassembly diagram of the end cover, bearing, and elastic gland in this case.

[0021] Figure 2 This is a diagram showing the assembly status of the end cover, bearing, and elastic gland in this case.

[0022] Figure 3 It is one of the structural schematic diagrams of the elastic gland in this case.

[0023] Figure 4 This is the second structural diagram of the elastic gland in this case.

[0024] Figure 5 It is a front view of the assembly state of the end cover, bearing and elastic pressure cover in this case.

[0025] Figure 6 yes Figure 5 Section view in the AA direction. DETAILED DESCRIPTION

[0026] The features of the present invention and other related features are further described in detail below through embodiments to facilitate understanding by those skilled in the art:

[0027] like Figures 1 to 6As shown, the present invention provides a motor end cover structure of an electric fan, including an end cover 1. In a specific implementation, the end cover 1 is a metal part formed by integral stamping. As the main body of the entire motor end cover structure, the end cover 1 provides a stable installation platform to ensure the correct installation and positioning of other components. The integrally stamped end cover 1 has a simple structure, high strength, low production cost, and is easy to mass produce. A first accommodating cavity 11 is formed in a recessed manner in the middle of the inner side of the end cover 1, and a bearing 2 is installed in the first accommodating cavity 11. The first accommodating cavity 11 provides an installation space so that the bearing 2 can be stably installed in the end cover 1, ensuring the precise installation position of the bearing 2 and ensuring the stable rotation of the external motor shaft after being connected to the bearing 2. A first boss 12 is formed in the middle of the inner side of the end cover 1, which is formed on the outer periphery of the first accommodating cavity 11, and an elastic pressure cover 3 is covered on the first boss 12. In a specific implementation, the first boss 12 is located on the outer periphery of the first accommodating cavity 11 and is an upwardly protruding annular structure. The first boss 12 provides a mounting platform for the elastic gland 3, ensuring that the elastic gland 3 can accurately cover the top of the bearing 2, making the installation of the elastic gland 3 more stable, reducing the error in the assembly process, and improving the stability of the overall structure after installation. In specific implementation, the elastic gland 3 is an integrally stamped metal part. The integrated elastic gland 3 simplifies the assembly steps and improves production efficiency. At the same time, the design of the spring 33 ensures the stability of the bearing 2 and the smooth operation of the motor. The elastic gland 3 includes an annular connecting portion 31 and a second boss 32 located at the upper end of the annular connecting portion 31. The annular connecting portion 31 is a part of the elastic gland 3, located at the lower end of the second boss 32, and cooperates with the first boss 12. The design of the annular connecting portion 31 makes the installation of the elastic gland 3 easier and reduces assembly time and cost. A through hole 321 for accommodating the bearing 2 and allowing the bearing 2 to pass through the second boss 32 is opened in the middle of the upper end of the second boss 32. The setting of the through hole 321 ensures that the bearing 2 can smoothly pass through the second boss 32 and remain in the correct position, effectively ensuring the accurate installation of the bearing 2 and improving the running smoothness and stability of the motor. A number of spring pieces 33 are formed equidistantly along the outer circumference of the through hole 321 on the second boss 32. The spring pieces 33 extend toward the through hole 321 and tilt upward and press on the upper end of the bearing 2. The elastic pressure cover 3 is fixed on the first boss 12 through the annular connecting portion 31. The spring piece 33 is pressed on the upper end of the bearing 2 to ensure that the bearing 2 is always in a stressed state. The design of the second boss 32 ensures the uniform distribution of the spring pieces 33, improves the uniformity of the force of the bearing 2, and further enhances the running stability of the motor. A number of hooks 13 for clamping the annular connecting portion 31 are provided on the inner side of the end cover 1 along the outer circumference of the first boss 12. The elastic pressure cover 3 is fixed on the first boss 12 by clamping the annular connecting portion 31 with the hook 13, ensuring the stable installation of the elastic pressure cover 3. The provision of the hook 13 makes the installation of the elastic pressure cover 3 more secure, reduces the error in the assembly process, and improves the reliability of the overall structure.In specific implementation, different metal materials or composite materials can be considered to be used to manufacture the end cover 1 and the elastic gland 3 to adapt to different use environments and performance requirements. For example, using high-strength stainless steel or aluminum alloy and other materials can improve the corrosion resistance and strength of the end cover 1 and the elastic gland 3.

[0028] Continue to refer to Figure 1-Figure 6 As shown, further, the diameter of the annular connecting portion 31 is larger than the diameter of the first boss 12 and the second boss 32, ensuring that the annular connecting portion 31 can completely cover the first boss 12 and is firmly fixed to the end cover 1 through the hook 13. This structural design increases the stability of the elastic pressure cover 3, prevents it from being displaced during use, and improves the reliability of the overall structure. The inner diameter of the second boss 32 is larger than the outer diameter of the first boss 12, ensuring that the second boss 32 can completely cover the first boss 12 and leaving enough space for the bearing 2 to be installed. In this way, the installation accuracy of the bearing 2 can be improved, ensuring the precise alignment of the motor axis and the bearing hole, and improving the running stability of the motor.

[0029] Furthermore, if Figure 3-Figure 6 As shown, an isolation groove 34 is formed between adjacent spring pieces 33 to separate the adjacent spring pieces 33. The isolation groove 34 separates the adjacent spring pieces 33 to prevent the spring pieces 33 from interfering with each other when subjected to force. The isolation groove 34 is provided to improve the independence and elasticity of the spring pieces 33, ensure that each spring piece 33 can evenly apply preload force, and improve the stability of the bearing 2.

[0030] Continue to refer to Figure 3-Figure 6As shown, the spring piece 33 includes a parallel end 331 parallel to the top end surface of the second boss 32 and a raised end 332 extending from the parallel end 331 into the through hole 321 and tilting upward, and an angle a is formed between the raised end 332 and the parallel end 331, and the angle of the angle a is 100°-150°. The parallel end 331 ensures the stability of the base of the spring piece 33, and the raised end 332 extends into the through hole 321 and tilts upward, pressing against the upper end of the bearing 2. The angle a formed between the raised end 332 and the parallel end 331, and the angle range of the angle a determine the degree of inclination of the spring piece 33, which in turn affects the preload force and contact area of ​​the spring piece 33 on the bearing 2. By setting the angle a to 100°-150°, the spring piece 33 can provide sufficient preload force when subjected to force, while avoiding damage to the bearing 2 caused by excessive compression, thereby improving the running smoothness and life of the motor. During specific implementation, taking into account the working environment, load conditions and service life of the motor, the angle a is preferably set to a range of 120° in the present invention to provide a moderate preload, which can ensure the stability of the bearing 2 without causing excessive compression, and is suitable for most conventional working conditions. Providing a moderate contact area not only ensures the uniform distribution of the preload, but also does not increase friction loss due to excessive contact area, thereby improving the operating efficiency of the motor. The angle a of 120° is suitable for a variety of working environments and load conditions, and has high versatility and reliability. In practical applications, users can fine-tune the angle a according to the specific motor type and working environment to achieve the best performance and service life. For example, a low-load, low-speed motor can select an angle a of 100°-110° to reduce wear and extend service life. A high-load, high-speed motor can select an angle a of 140°-150° to ensure stability under high load. Through a reasonable design of the angle a, the performance and reliability of the electric fan motor end cover structure can be significantly improved to meet the needs of different application scenarios.

[0031] like Figure 4 As shown, further, the middle part of the inner side of the upper end of the second boss 32 is recessed downward to form a third boss 35, and the spring piece 33 is arranged on the third boss 35. The arrangement of the third boss 35 improves the installation accuracy of the spring piece 33, ensures that each spring piece 33 can evenly apply the preload force, and further improves the stability of the bearing 2. At the same time, the third boss 35 formed by the downward recess can play a downward pressing effect on the bearing 2 to ensure the stability of the bearing 2.

[0032] like Figure 6As shown, the bearing 2 is an oil-containing bearing 2, and a shaft hole 21 is formed in the middle of the bearing 2 for the motor shaft to pass through. The bearing 2 also includes an oil storage portion 22 circumferentially arranged outside the shaft hole 21. The oil storage portion 22 is used to store lubricating oil to ensure that the bearing 2 maintains a good lubrication state during long-term operation. By providing the oil storage portion, the wear resistance and service life of the bearing 2 are improved, the friction and wear during the operation of the motor are reduced, and the noise is reduced.

[0033] Furthermore, the diameter of the oil-containing bearing 2 is 6mm-12mm, and the user can select oil-containing bearings of different sizes according to the needs to match different motors. In the specific implementation, the diameter of the oil-containing bearing in the present invention is preferably 6mm, 8mm, 10mm and 12mm, but within the range of 6mm-12mm, the diameter of the oil-containing bearing 2 is not limited to the four types shown in this embodiment. When the user selects oil-containing bearings 2 of different diameters, the size of the elastic gland 3 needs to be adaptively improved to adapt to oil-containing bearings 2 of different diameters.

[0034] like Figure 1 , Figure 2 As shown, a plurality of heat dissipation holes 14 are equidistantly provided on the end cover 1 along the outer circumference of the first boss 12. In a specific implementation, there are 4 heat dissipation holes. The heat dissipation holes 14 help the internal motor of the motor end cover structure of this case to dissipate heat during operation, prevent the internal motor from overheating, improve the heat dissipation performance of the motor end cover structure of this case, extend the service life of the internal motor, and ensure the stable operation of the internal motor in a high temperature environment.

[0035] Furthermore, the number of the spring pieces 33 is 6-14. In specific implementation, the user can select and set different numbers of spring pieces 33 according to the needs to match different motors and oil-containing bearings. In the present invention, the number of spring pieces is preferably set to 8, 10 and 12. However, within the range of 6-14 spring pieces 33, it is not limited to the three shown in this embodiment. When the user selects different numbers of spring pieces 33, it is necessary to make adaptive improvements to the specific structure of the elastic gland 3 to better adapt to the installation.

[0036] As mentioned above, this case protects a motor end cover structure of an electric fan, and all technical solutions that are the same or similar to this case should be deemed to fall within the protection scope of this case.

Claims

1. A motor end cover structure of an electric fan, comprising an end cover (1), wherein a first accommodating cavity (11) is formed in a recessed manner in the middle of the inner side of the end cover (1), and a bearing (2) is installed in the first accommodating cavity (11), characterized in that: The end cover (1) is integrally formed by stamping, and a first boss (12) is formed in the middle of the inner side of the end cover (1) and protrudes upwards. The first boss (12) is formed on the outer periphery of the first accommodating cavity (11), and an elastic pressure cover (3) is covered on the first boss (12). The elastic pressure cover (3) is integrally formed by stamping, and the elastic pressure cover (3) comprises an annular connecting portion (31) and a second boss (32) located at the upper end of the annular connecting portion (31). The second boss (3 2) A through hole (321) is provided in the middle of the upper end for accommodating the bearing (2) and allowing the bearing (2) to pass through the second boss (32); a plurality of spring pieces (33) are formed on the second boss (32) at equal intervals along the outer circumference of the through hole (321); the spring pieces (33) extend toward the through hole (321) and tilt upward and are pressed against the upper end of the bearing (2); and a plurality of hooks (13) for clamping the annular connecting portion (31) are provided on the inner side of the end cover (1) along the outer circumference of the first boss (12).

2. The motor end cover structure of an electric fan according to claim 1, characterized in that: The diameter of the annular connecting portion (31) is greater than the diameters of the first boss (12) and the second boss (32), and the inner diameter of the second boss (32) is greater than the outer diameter of the first boss (12).

3. The motor end cover structure of an electric fan according to claim 1, characterized in that: An isolation groove (34) is formed between adjacent elastic sheets (33) to separate the adjacent elastic sheets (33).

4. The motor end cover structure of an electric fan according to claim 1, characterized in that: The spring sheet (33) comprises a parallel end (331) parallel to the top end surface of the second boss (32) and a raised end (332) extending from the parallel end (331) into the through hole (321) and raised upward, wherein an angle a is formed between the raised end (332) and the parallel end (331), and the angle a is 100°-150°.

5. The motor end cover structure of an electric fan according to claim 1, characterized in that: The middle portion of the inner side of the upper end of the second boss (32) is recessed downward to form a third boss (35), and the spring sheet (33) is arranged on the third boss (35).

6. The motor end cover structure of an electric fan according to claim 1, characterized in that: The bearing (2) is an oil-containing bearing. A shaft hole (21) through which the motor shaft passes is formed in the middle of the bearing (2). The bearing (2) also includes an oil storage portion (22) circumferentially arranged outside the shaft hole (21).

7. The motor end cover structure of an electric fan according to claim 1, characterized in that: The diameter of the oil-containing bearing (2) is 6 mm-12 mm.

8. The motor end cover structure of an electric fan according to claim 1, characterized in that: The end cover (1) is provided with a plurality of heat dissipation holes (14) at equal intervals along the outer circumference of the first boss (12).

9. The motor end cover structure of an electric fan according to claim 1, characterized in that: The number of the spring pieces (33) is 6 to 14.

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