Die press fitting for EC permanent magnet frequency conversion fan magnetic steel

By designing a coaxially set press-mounted upper and lower mold structure, combining positioning magnetic steel and telescopic springs, the problems of traditional mold damage to the motor shell and inaccurate positioning are solved, and efficient and accurate installation of the magnetic steel ring is achieved.

CN223115039UActive Publication Date: 2025-07-18GUANGDONG ZHAOQING DETON
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Patent Information

Application Number
CN202422059086.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-23
Publication Date
2025-07-18
Estimated Expiration
2034-08-23

AI Technical Summary

Technical Problem

Traditional magnet ring mounting molds are prone to damage the motor housing and are difficult to ensure the positioning accuracy and vertical consistency of the magnet ring after pressing.

Method used

A mold structure including a press-fit upper mold and a press-fit lower mold is designed. The press-fit upper mold is located above the lower mold and can move up and down. The motor housing installation position is provided at the bottom of the lower mold. The upper mold surface is equipped with a magnetic steel ring mounting seat. The installation position is arranged coaxially with the seat. The positioning magnetic steel and telescopic spring are used for limiting and positioning, and the guide column ensures perpendicularity.

Benefits of technology

It avoids damage to the motor housing during the pressing of the magnetic steel ring, and improves the assembly quality and efficiency of the magnetic steel and the motor housing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a mould press fitting for EC permanent magnet frequency conversion fan magnetic steel, which comprises a press fitting upper mould and a press fitting lower mould, the press fitting upper mould is positioned above the press fitting lower mould and can move up and down relative to the press fitting lower mould, the bottom of the press fitting upper mould is provided with a round mounting position for arranging a motor shell, and when in use, the press fitting upper mould is fixed on the press fitting lower mould. The motor shell is detachably arranged in the installation position downwards, an installation base used for installing a magnetic steel ring is arranged on the upper surface of the press-fitting lower die, and the installation position and the installation base are coaxially arranged. According to the utility model, the motor housing can be prevented from being damaged in the process of pressing the magnetic steel ring, and the assembling quality and the assembling efficiency of the magnetic steel and the motor housing are ensured.
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Description

Technical Field

[0001] The utility model relates to the technical field of EC permanent magnet variable frequency fans, and particularly relates to a die pressing for the magnetic steel of an EC permanent magnet variable frequency fan. Background Technique

[0002] The EC permanent magnet variable frequency fan is a new type of high-efficiency and energy-saving fan that can be used in home kitchens, hot pot restaurants, moxibustion halls, barbecue shops, etc. It mainly includes four components: a motor, a fan blade, a base, and a column. Among them, the magnetic steel ring, which is a core key component of the motor, is particularly important. In particular, the installation quality of the magnetic steel ring determines the operating performance and energy efficiency value of the product. The traditional magnetic steel ring installation dies on the market have the following defects:

[0003] The traditional method is to place the motor housing below and the magnetic steel ring above, and press the magnetic steel into the motor housing through the upper die. This method is likely to cause damage to the motor housing.

[0004] The pressing die has no positioning posts, making it difficult to ensure the accuracy of the magnetic steel ring positioning after pressing and the vertical consistency downward during pressing. Content of the Utility Model

[0005] The main purpose of the utility model is to propose a die pressing for the magnetic steel of an EC permanent magnet variable frequency fan that is simple to assemble, has positioning pressing, high accuracy, and is easy to maintain, disassemble and assemble in the future.

[0006] To achieve the above purpose, the utility model provides a die pressing for the magnetic steel of an EC permanent magnet variable frequency fan, including: an upper pressing die and a lower pressing die. The upper pressing die is located above the lower pressing die and can move up and down relative to the lower pressing die. A circular installation position for setting the motor housing is provided at the bottom of the upper pressing die. During use, the motor housing is detachably arranged downward in the installation position. An installation seat for installing the magnetic steel ring is provided on the upper surface of the lower pressing die, and the installation position and the installation seat are coaxially arranged.

[0007] A further technical solution of the utility model is that positioning magnets are arranged in the installation position.

[0008] A further technical solution of the utility model is that there are two positioning magnets, and the two positioning magnets are evenly distributed at both ends of the installation position.

[0009] A further technical solution of the utility model is that the installation seat is a cylindrical stepped structure, and the outer diameter of the top of the installation seat is smaller than the outer diameter of the bottom.

[0010] A further technical solution of the present utility model is that it further includes a first telescopic spring and a positioning and returning plate. A first mounting hole is provided on the stepped surface of the mounting seat. A second mounting hole is provided at the bottom of the positioning and returning plate. The lower end of the first telescopic spring is arranged in the first mounting hole, and the upper end of the first telescopic spring is arranged in the second mounting hole. The positioning and returning plate is sleeved on the upper end of the mounting seat, and the top of the mounting seat protrudes out of the positioning and returning plate to limit the magnetic steel ring.

[0011] A further technical solution of the present utility model is that a central hole matching with the rotor shaft of the motor is provided at the central position of the mounting seat.

[0012] A further technical solution of the present utility model is that it further includes a guide post. The lower end of the guide post is connected to the lower die for press-fitting, and the upper end is movably connected to the upper die for press-fitting.

[0013] A further technical solution of the present utility model is that a first boss is provided on the lower die for press-fitting. A guide post mounting hole is provided in the first boss. The lower end of the guide post is inserted into the guide post mounting hole and is in interference fit with the guide post mounting hole.

[0014] A further technical solution of the present utility model is that a second boss is provided on the upper die for press-fitting. The top of the guide post is movably arranged in the second boss.

[0015] A further technical solution of the present utility model is that it further includes a second telescopic spring. The second telescopic spring is sleeved outside the guide post and the first boss. The bottom of the second telescopic spring abuts against the lower die for press-fitting, and the top abuts against the upper die for press-fitting.

[0016] The beneficial effect of the present utility model for the die press-fitting of the magnetic steel of the EC permanent magnet variable frequency fan is:

[0017] Through the above technical solutions, the present utility model includes an upper die for press-fitting and a lower die for press-fitting. The upper die for press-fitting is located above the lower die for press-fitting and can move up and down relative to the lower die for press-fitting. A circular mounting position for arranging the motor housing is provided at the bottom of the upper die for press-fitting. During use, the motor housing is detachably arranged in the mounting position with the opening facing downwards. The upper surface of the lower die for press-fitting is provided with a mounting seat for mounting the magnetic steel ring. The mounting position and the mounting seat are coaxially arranged, which can avoid damaging the motor housing during the process of press-fitting the magnetic steel ring. In addition, by coaxially arranging the mounting position and the mounting seat, the present utility model can ensure the assembly quality and assembly efficiency of the magnetic steel and the motor housing. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the die pressing of the permanent magnet for the EC permanent magnet variable frequency fan of the present invention;

[0020] Figure 2 It is a cross-sectional view of the preferred embodiment of the die pressing of the permanent magnet for the EC permanent magnet variable frequency fan of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the lower die for pressing;

[0022] Figure 4 It is a schematic diagram of the structure of the positioning and returning plate;

[0023] Figure 5 It is a schematic diagram of the structure of the guide post;

[0024] Figure 6 It is a schematic diagram of the principle of pressing the permanent magnet ring.

[0025] Explanation of the reference numerals in the drawings:

[0026] Upper die for pressing 10: First boss 101; Guide post mounting hole 102;

[0027] Lower die for pressing 20: First mounting hole 201; Central hole 202;

[0028] Mounting seat 30;

[0029] Positioning permanent magnet 40;

[0030] First telescopic spring 50;

[0031] Positioning and returning plate 60;

[0032] Guide post 70;

[0033] Second telescopic spring 80;

[0034] Motor housing 90;

[0035] Permanent magnet ring 100.

[0036] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation manners

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Please refer to Figures 1 to 6 The utility model proposes a mold press-fitting for EC permanent magnet variable frequency fan magnetic steel, comprising: a press-fitting upper mold 10 and a press-fitting lower mold 20, wherein the press-fitting upper mold 10 is located above the press-fitting lower mold 20 and can move up and down relative to the press-fitting lower mold 20, and a circular mounting position for setting a motor housing 90 is provided at the bottom of the press-fitting upper mold 10. When in use, the motor housing 90 is detachably arranged downward in the mounting position, and a mounting seat for mounting a magnetic steel ring 100 is provided on the upper surface of the press-fitting lower mold 20, and the mounting position is coaxially arranged with the mounting seat.

[0039] In this embodiment, the motor housing 90 is detachably arranged downward in the installation position, and the magnetic steel ring 100 is arranged on the installation seat of the press-fit lower die 20, that is, the motor housing 90 is located above the magnetic steel ring 100, and the assembly of the magnetic steel and the motor housing 90 is completed by the up and down movement of the press-fit upper die 10, which can avoid damage to the motor housing 90. In addition, in this embodiment, by coaxially arranging the installation position and the installation seat, the assembly quality and assembly efficiency of the magnetic steel and the motor housing 90 can be guaranteed.

[0040] Furthermore, in this embodiment, a positioning magnetic steel 40 is provided in the installation position.

[0041] Preferably, the positioning magnetic steel 40 is in two pieces, and the two positioning magnetic steels 40 are evenly distributed at both ends of the installation position. In this embodiment, the motor housing 90 can be magnetically adhered to the two positioning magnetic steels 40, so that the motor housing 90 can be adsorbed to the installation position before the magnetic steel ring 100 is pressed into the motor housing 90, and after the magnetic steel ring 100 is pressed into the motor housing 90, the motor housing 90 is easily separated from the press-fitting upper die 10 when the press-fitting upper die 10 moves upward, so as to take out the magnetic steel ring 100 and the motor housing 90 after the press-fitting is completed.

[0042] Furthermore, in this embodiment, the mounting seat is a cylindrical step structure, and the top outer diameter of the mounting seat is smaller than the bottom outer diameter.

[0043] In this embodiment, the die pressing for the magnet of the EC permanent magnet variable frequency fan further includes a first telescopic spring 50 and a positioning and returning plate 60. A first mounting hole 30201 is provided on the stepped surface of the mounting seat. A second mounting hole 30 is provided at the bottom of the positioning and returning plate 60. The lower end of the first telescopic spring 50 is disposed in the first mounting hole 30201, and the upper end of the first telescopic spring 50 is disposed in the second mounting hole 30. The positioning and returning plate 60 is sleeved on the upper end of the mounting seat, and the top of the mounting seat protrudes out of the positioning and returning plate 60 to limit the magnet ring 100.

[0044] As an implementation scheme, in this embodiment, there are four first telescopic springs 50, which are evenly distributed between the stepped surface of the mounting seat and the positioning and returning plate 60.

[0045] In this embodiment, a central hole 202 that cooperates with the rotor shaft of the motor is provided at the central position of the mounting seat.

[0046] Furthermore, in this embodiment, the die pressing for the magnet of the EC permanent magnet variable frequency fan further includes a guide post 70. The lower end of the guide post 70 is connected to the lower die 20 for pressing, and the upper end is movably connected to the upper die 10 for pressing. As an implementation scheme, in this embodiment, there are four guide posts 70, which are respectively arranged around the upper die 10 for pressing and the lower die 20 for pressing.

[0047] In this embodiment, a first boss 101 is provided on the lower die for pressing. A guide post mounting hole 30102 is provided in the first boss 101. The lower end of the guide post 70 is inserted into the guide post mounting hole 30102 and is in interference fit with the guide post mounting hole 30102. Corresponding to the four guide posts 70, the number of the first bosses 101 in this embodiment is also four.

[0048] In this embodiment, a second boss is provided on the upper die for pressing. The top of the guide post 70 is movably disposed in the second boss.

[0049] In this embodiment, the die pressing for the magnet of the EC permanent magnet variable frequency fan further includes a second telescopic spring 80. The second telescopic spring 80 is sleeved outside the guide post 70 and the first boss 101. The bottom of the second telescopic spring 80 abuts against the lower die 20 for pressing, and the top abuts against the upper die 10 for pressing.

[0050] The structure and working principle of the die pressing for the magnet of the EC permanent magnet variable frequency fan of the present utility model will be elaborated in detail below.

[0051] In this embodiment, the motor housing 90 is disposed within the installation position and is positioned vertically downward by the magnetic attraction of the two positioning magnets 40. The magnet ring 100 is disposed on the top of the mounting base and is placed on the positioning return plate 60. The upper pressing die 10 is connected to a jogging hydraulic press. When the jogging hydraulic press is started, the upper pressing die 10 moves downward hydraulically. When the positioning return plate 60 contacts the step surface of the mounting base, the magnet ring 100 enters the motor housing 90 for press-fitting and positioning. Then, the jogging hydraulic press is turned off, and the second telescopic spring 80 moves the upper pressing die 10 upward under the elastic action. At this time, the motor housing 90 is separated from the upper pressing die 10, and the press-fitted motor housing 90 can be taken out, and the press-fitting of the magnet ring 100 is completed.

[0052] The following elaborates in detail on the structure and working principle of the die press-fitting for the EC permanent magnet variable frequency fan magnet of the present utility model.

[0053] In this embodiment, the motor housing is disposed within the installation position and is positioned vertically downward by the magnetic attraction of the two positioning magnets. The magnet ring is disposed on the top of the mounting base and is placed on the positioning return plate. The upper pressing die is connected to a jogging hydraulic press. When the jogging hydraulic press is started, the upper pressing die moves downward hydraulically. When the positioning return plate contacts the step surface of the mounting base, the magnet ring enters the motor housing for press-fitting and positioning. Then, the jogging hydraulic press is turned off, and the second telescopic spring moves the upper pressing die upward under the elastic action. At this time, the motor housing is separated from the upper pressing die, and the press-fitted motor housing can be taken out, and the press-fitting of the magnet ring is completed.

[0054] The beneficial effects of the die press-fitting for the EC permanent magnet variable frequency fan magnet of the present utility model are as follows:

[0055] Through the above technical solution, the present utility model includes an upper pressing die and a lower pressing die. The upper pressing die is located above the lower pressing die and can move up and down relative to the lower pressing die. A circular installation position for setting the motor housing is provided at the bottom of the upper pressing die. During use, the motor housing is detachably disposed downward within the installation position. An installation base for installing the magnet ring is provided on the upper surface of the lower pressing die. The installation position and the installation base are coaxially arranged, which can avoid damaging the motor housing during the process of press-fitting the magnet ring. In addition, by coaxially arranging the installation position and the installation base, the present utility model can ensure the assembly quality and assembly efficiency of the magnet and the motor housing.

[0056] The above are only the preferred embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present utility model.

Claims

1. A die pressing for the magnetic steel of an EC permanent magnet variable frequency fan, characterized in that, Comprising: A press-fitting upper die and a press-fitting lower die, the press-fitting upper die is located above the press-fitting lower die and can move up and down relative to the press-fitting lower die. A circular mounting position for setting the motor housing is provided at the bottom of the press-fitting upper die. During use, the motor housing is detachably arranged downward in the mounting position. An installation seat for mounting the magnetic steel ring is provided on the upper surface of the press-fitting lower die, and the mounting position and the installation seat are coaxially arranged.

2. The die pressing for the permanent magnet of the EC permanent magnet variable frequency fan according to claim 1, wherein Positioning magnets are arranged in the mounting position.

3. The die pressing for the permanent magnet of the EC permanent magnet variable frequency fan according to claim 2, characterized in that, There are two positioning magnets, and the two positioning magnets are evenly distributed at both ends of the mounting position.

4. The die pressing for the permanent magnet of the EC permanent magnet variable frequency fan according to claim 1, characterized in that, The installation seat is a cylindrical stepped structure, and the outer diameter of the top of the installation seat is smaller than the outer diameter of the bottom.

5. The die pressing for the permanent magnet of the EC permanent magnet variable frequency fan according to claim 4, characterized in that, It further includes a first telescopic spring and a positioning and returning plate. A first installation hole is provided on the stepped surface of the installation seat, a second installation hole is provided at the bottom of the positioning and returning plate, the lower end of the first telescopic spring is arranged in the first installation hole, the upper end of the first telescopic spring is arranged in the second installation hole, the positioning and returning plate is sleeved on the upper end of the installation seat, and the top of the installation seat extends out of the positioning and returning plate to limit the magnetic steel ring.

6. The die pressing for the permanent magnet of the EC permanent magnet variable frequency fan according to claim 5, characterized in that, A central hole matching the rotor shaft of the motor is provided at the central position of the installation seat.

7. The die pressing for the permanent magnet of the EC permanent magnet variable frequency fan according to claim 1, wherein, It further includes a guide post, the lower end of the guide post is connected to the press-fitting lower die, and the upper end is movably connected to the press-fitting upper die.

8. The die pressing for the magnet of the EC permanent magnet variable frequency fan according to claim 7, characterized in that, A first boss is provided on the press-fitting lower die, a guide post installation hole is provided in the first boss, and the lower end of the guide post is inserted into the guide post installation hole and is in interference fit with the guide post installation hole.

9. The die pressing for the permanent magnet of the EC permanent magnet variable frequency fan according to claim 8, characterized in that, A second boss is provided on the press-fitting upper die, and the top of the guide post is movably arranged in the second boss.

10. The die pressing for the permanent magnet of the EC permanent magnet variable frequency fan according to claim 9, characterized in that, It further includes a second telescopic spring, the second telescopic spring is sleeved outside the guide post and the first boss, the bottom of the second telescopic spring abuts against the press-fitting lower die, and the top abuts against the press-fitting upper die.