Motor end cover structure of electric fan

Abstract

The utility model 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 utility model relates to the field of electric fan accessories, and specifically relates to a motor end cover structure of electric fan. BACKGROUND

[0002] With the progress of science and technology and the improvement of consumer demand for product quality, as one of the indispensable household appliances in daily life, the performance and service life of electric fan have attracted more and more attention. As the core component of electric fan, the stability and efficiency of motor directly affect the performance of the whole product. The motor end cover is a key component in the motor, which not only supports the structure of the motor, but also plays an important role in protecting the internal elements and ensuring smooth operation of the motor.

[0003] In the existing design of electric fan motor end cover, a four-component combined structure composed of an end cover, an oil cover, a bearing and a spring plate is generally used. The spring plate is an independent component formed by stamping after heat treatment, and its main function is to apply appropriate pre-tightening force to the bearing during motor operation 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 method has some obvious shortcomings.

[0004] Since the spring plate and the oil cover are two independent components, their installation positions are difficult to perfectly match, which leads to the fact that the motor axis and the bearing hole on the end cover cannot be completely aligned, i.e. the so-called "misalignment" phenomenon. Misalignment increases the frictional resistance during motor operation, reduces motor efficiency, and may even cause premature motor damage. The assembly process of multiple components is relatively complicated, which not only increases the manufacturing cost, but also increases the error rate during production, affecting the overall quality of the product.

[0005] The multiple components used in the traditional design need to be machined and assembled separately, which not only prolongs the production cycle, but also increases material consumption and labor cost

[0006] Therefore, the utility model provides an innovative integrated design that combines the oil cover and the spring plate into one, achieving close combination of the two through one-stamping forming process to overcome the defects of the prior art. CONTENT OF THE UTILITY MODEL

[0007] The utility model overcomes the shortcomings of the above-mentioned technology and provides a motor end cover structure of electric fan.

[0008] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0009] The utility model provides an electric fan's motor end cover structure, including end cover, the inside middle part of the end cover is recessed and forms first accommodating cavity, bearing is installed in the first accommodating cavity, it is characterized in being that: the end cover is integrally stamping forming and is made, and the inside middle part of the end cover is formed with the first boss upwards, the first boss is formed in the first accommodating cavity periphery, the first boss is covered with the elastic gland, the elastic gland is integrally stamping forming and is made, the elastic gland includes annular connecting portion and the second boss at annular connecting portion upper end, the through -hole for accommodating bearing and makes the through -hole of bearing to wear out the second boss upper end middle part and is equipped with, and the second boss is formed with a plurality of elastic sheets along the through -hole periphery equidistance circumferentially, and the elastic sheet extends towards the through -hole and is upturned and is pressed in the upper end of bearing, and the inside of the end cover is equipped with a plurality of clamping hooks for clamping annular connecting portion along the first boss periphery equidistance circumferentially.

[0010] Further, the diameter of the annular connecting portion is greater than the diameter of the first boss and the second boss, and the inner diameter of the second boss is greater than the outer diameter of the first boss.

[0011] Further, the adjacent elastic sheets are formed with isolation grooves separating the adjacent elastic sheets.

[0012] Further, the elastic sheet includes a parallel end parallel to the top end surface of the second boss and a upturned end extending into the through hole from the parallel end and upturned, the included angle a is formed between the parallel end and the upturned end, and the angle of the included angle a is 100-150°.

[0013] Further, the inside middle part of the upper end of the second boss is recessed to form a third boss, and the elastic sheet is arranged on the third boss.

[0014] Further, the bearing is an oil-containing bearing, the bearing is formed with a shaft hole for the motor shaft to pass through in the middle part, and the bearing further includes an oil storage part circumferentially arranged on the outer side of the shaft hole.

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

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

[0017] Further, the elastic sheet is provided with 6-14.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] Compared with the existing technology, this case combines the oil cover and the spring into one elastic pressure cover, and achieves a tight combination of the two through a single stamping process. The elastic pressure cover and end cover with an integrated stamping design ensure the precise alignment of the motor axis and the bearing hole, improving the smoothness and efficiency of the motor operation. This case reduces the original three independent components to two, greatly simplifying the assembly steps, reducing the complexity and error probability in the production process, improving production efficiency, and enhancing 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 overall production costs. 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 long-term reliability of the motor. The design of the spring improves the stability of the bearing, reduces vibration and noise during motor operation, and enhances the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0022] Figure 3 This is one of the structural 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 This is a front view of the assembled 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 following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0027] like Figures 1 to 6As shown, the utility model provides a motor end cover structure of electric fan, including end cover 1. The specific implementation end cover 1 is the metal piece of integrated stamping forming. End cover 1 as the main body of the whole motor end cover structure provides a stable installation platform, ensures the correct installation and positioning of other components. The structure of integrated stamping forming end cover 1 is simple, high in strength, low in production cost, and easy to mass production. The first accommodating cavity 11 is recessed in the middle of the inner side of end cover 1, and bearing 2 is installed in the first accommodating cavity 11. The first accommodating cavity 11 provides an installation space, so that bearing 2 can be stably installed in end cover 1, ensuring the accurate installation position of bearing 2, ensuring the stable rotation of the external motor shaft after being connected to bearing 2. The first boss 12 is formed upward in the middle of the inner side of end cover 1, and the first boss 12 is formed on the outer periphery of the first accommodating cavity 11. The elastic gland 3 is covered on the first boss 12. In specific implementation, the first boss 12 is located on the outer periphery of the first accommodating cavity 11, which is an annular structure protruding upward. The first boss 12 provides an installation platform for the elastic gland 3, ensuring that the elastic gland 3 can accurately cover above bearing 2, so that the installation of the elastic gland 3 is more stable, reduces the error in the assembly process, and improves the stability of the overall structure after installation. In specific implementation, the elastic gland 3 is a metal piece of integrated stamping forming. The integrated design of the elastic gland 3 simplifies the assembly steps, improves the production efficiency, and the design of the elastic sheet 33 ensures the stability of the bearing 2 and the smooth operation of the motor. The elastic gland 3 includes an annular connecting part 31 and a second boss 32 located at the upper end of the annular connecting part 31. The annular connecting part 31 is 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 part 31 makes the installation of the elastic gland 3 more convenient, reduces the assembly time and cost. The second boss 32 has a through hole 321 in the middle of the upper end for accommodating the bearing 2 and allowing the bearing 2 to pass through 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 be kept in the correct position, effectively ensuring the accurate installation of the bearing 2 and improving the smooth operation and stability of the motor. The second boss 32 has a plurality of elastic sheets 33 formed equidistantly along the outer periphery of the through hole 321. The elastic sheets 33 extend towards the through hole 321 and are pressed tightly on the upper end of the bearing 2. The elastic gland 3 is fixed on the first boss 12 through the annular connecting part 31, and the elastic sheets 33 are pressed tightly on the upper end of the bearing 2, ensuring that the bearing 2 is always in a stressed state. The design of the second boss 32 ensures the uniform distribution of the elastic sheets 33, improves the uniformity of the stress of the bearing 2, and further enhances the running stability of the motor. A plurality of hooks 13 for clamping the annular connecting part 31 are provided along the outer periphery of the first boss 12 on the inner side of the end cover 1. The annular connecting part 31 is clamped by the hooks 13 to fix the elastic gland 3 on the first boss 12, ensuring the stable installation of the elastic gland 3. The setting of the hooks 13 makes the installation of the elastic gland 3 more firm, 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 for manufacturing the end cover 1 and the elastic gland 3 to adapt to different use environments and performance requirements. For example, high-strength stainless steel or aluminum alloy and other materials are used, so as to improve the corrosion resistance and strength of the end cover 1 and the elastic gland 3.

[0028] With reference to the foregoing Figures 1-6 Further, as shown in the drawings, the diameter of the annular connecting portion 31 is greater than the diameters of the first boss 12 and the second boss 32, so that the annular connecting portion 31 can completely cover the first boss 12 and be firmly fixed on the end cover 1 through the snap 13. The design of this structure increases the stability of the elastic gland 3, prevents displacement of the elastic gland 3 during use, and improves the reliability of the overall structure. The inner diameter of the second boss 32 is greater than the outer diameter of the first boss 12, so that the second boss 32 can completely cover the first boss 12 and leave enough space for the bearing 2 to be installed. In this way, the installation precision of the bearing 2 can be improved, the motor axis is accurately aligned with the bearing hole, and the running stability of the motor is improved.

[0029] Further, as shown in the drawings, Figures 3-6 The isolation grooves 34 are formed between adjacent elastic sheets 33 to separate the adjacent elastic sheets 33. The isolation grooves 34 separate the adjacent elastic sheets 33 to prevent the elastic sheets 33 from interfering with each other when subjected to force. By providing the isolation grooves 34, the independence and elasticity of the elastic sheets 33 are improved, so that each elastic sheet 33 can uniformly apply the pre-tightening force, and the stability of the bearing 2 is improved.

[0030] With reference to the foregoing Figures 3-6As shown, the spring sheet 33 includes a parallel end 331 parallel to the top end surface of the second boss 32 and a raised end 332 extending into the through hole 321 and upward from the parallel end 331, forming an included angle a between the parallel end 331 and the raised end 332, with the angle of the included angle a being 100°-150°. The parallel end 331 ensures the stability of the base of the spring sheet 33, and the raised end 332 extends into the through hole 321 and is upwardly recessed, pressing against the upper end of the bearing 2. The included angle a formed between the parallel end 331 and the raised end 332 determines the degree of inclination of the spring sheet 33, which in turn affects the pre-tightening force and contact area of the spring sheet 33 on the bearing 2. By setting the angle of the included angle a to be 100°-150°, the spring sheet 33 can provide sufficient pre-tightening force when under stress, while avoiding excessive compression that can damage the bearing 2, improving the smoothness of operation and the life of the motor. In specific implementation, considering factors such as the working environment, load conditions, and service life of the motor, the angle of the included angle a is preferably set to a range of 120° in the utility model to provide moderate pre-tightening force, which can ensure the stability of the bearing 2 without causing excessive compression, suitable for most conventional working conditions, providing moderate contact area that ensures uniform distribution of pre-tightening force without increasing friction loss due to excessive contact area, improving the operating efficiency of the motor, and the included angle a of 120° is suitable for various working environments and load conditions, with high versatility and reliability. In actual application, the user can fine-tune the included angle a according to the specific type and working environment of the motor to achieve optimal performance and service life. For example, low-load, low-speed motors can choose an included angle a of 100°-110° to reduce wear and extend service life. High-load, high-speed motors can choose an included angle a of 140°-150° to ensure stability under high load. Through reasonable design of the included angle a, the performance and reliability of the motor end cover structure of the electric fan can be significantly improved to meet the needs of different application scenarios.

[0031] As shown in Figure 4 Further, as shown, a third boss 35 is formed by recessing the middle part of the inner side of the upper end of the second boss 32 downward, and the spring sheet 33 is arranged on the third boss 35. The arrangement of the third boss 35 improves the installation precision of the spring sheet 33, ensuring that each spring sheet 33 can uniformly apply pre-tightening force, further improving the stability of the bearing 2. At the same time, the third boss 35 formed by recessing downward can press the bearing 2 downward to ensure the stability of the bearing 2.

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

[0033] Further, the oil-containing bearing 2 has a diameter of 6-12 mm, and users can select oil-containing bearings of different sizes according to their needs to match different motors. In specific implementation, the diameter of the oil-containing bearing in the utility model is preferably 6 mm, 8 mm, 10 mm and 12 mm, but within the range of 6-12 mm of the diameter of the oil-containing bearing 2, it is not limited to the four shown in the embodiment. When users select oil-containing bearings 2 of different diameters, the size of the elastic gland 3 needs to be improved adaptively to adapt to oil-containing bearings 2 of different diameters.

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

[0035] Further, the spring piece 33 is provided with 6-14, and in specific implementation, users can select different numbers of spring pieces 33 according to their needs to match different motors and oil-containing bearings. In the utility model, the number of spring pieces is preferably set to 8, 10 and 12. However, within the range of 6-14 of the spring piece 33, it is not limited to the three shown in the embodiment. When users select different numbers of spring pieces 33, the specific structure of the elastic gland 3 needs to be improved adaptively to better adapt to installation.

[0036] As described above, the case protects a motor end cover structure of an electric fan, and all technical solutions identical or similar to the case shall be shown to fall within the protection scope of the case.

Claims

1. An electric motor end cover structure of an electric fan, comprising an end cover (1), a first accommodating cavity (11) is concavely formed in the middle part 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, a first boss (12) is formed on the middle of the inner side of the end cover (1) and protrudes upward, the first boss (12) is formed on the outer periphery of a first accommodating cavity (11), an elastic gland (3) is fitted on the first boss (12), the elastic gland (3) is integrally formed by stamping, the elastic gland (3) comprises an annular connecting portion (31) and a second boss (32) located on the upper end of the annular connecting portion (31), a through hole (321) for accommodating the bearing (2) and allowing the bearing (2) to pass through the second boss (32) is formed on the middle of the upper end of the second boss (32), a plurality of elastic sheets (33) are formed on the outer periphery of the through hole (321) of the second boss (32) at equal intervals in the circumferential direction, the elastic sheets (33) extend towards the through hole (321) and are bent upward and tightly pressed on the upper end of the bearing (2), and a plurality of clamping hooks (13) for clamping the annular connecting portion (31) are arranged on the inner side of the end cover (1) along the outer periphery of the first boss (12).

2. A motor end shield construction for an electric fan as defined in claim 1, wherein: 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. A motor end shield construction for an electric fan as defined in claim 1, wherein: The elastic sheets (33) are separated by isolation grooves (34) formed between adjacent elastic sheets (33).

4. A motor end shield construction for an electric fan as defined in claim 1, wherein: The elastic sheet (33) comprises a parallel end (331) parallel to the top end surface of the second boss (32) and a bent end (332) extending into the through hole (321) from the parallel end (331) and bent upward, an included angle a is formed between the bent end (332) and the parallel end (331), and the angle of the included angle a is 100°-150°.

5. A motor end shield construction for an electric fan as defined in claim 1, wherein: A third boss (35) is formed on the inner side of the middle of the upper end of the second boss (32) and protrudes downward, and the elastic sheet (33) is arranged on the third boss (35).

6. A motor end shield construction for an electric fan as defined in claim 1, wherein: The bearing (2) is an oil-containing bearing, a shaft hole (21) for passing through a motor shaft is formed in the middle of the bearing (2), and the bearing (2) further comprises an oil storage portion (22) arranged on the outer side of the shaft hole (21) in the circumferential direction.

7. A motor end shield construction for an electric fan as claimed in claim 1, characterized in that: The diameter of the bearing (2) is 6mm-12mm.

8. A motor end shield construction for an electric fan as defined in claim 1, wherein: A plurality of heat dissipation holes (14) are formed on the end cover (1) at equal intervals along the outer periphery of the first boss (12).

9. A motor end shield construction for an electric fan as defined in claim 1, wherein: The elastic sheet (33) is provided with 6-14 elastic sheets.

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