Support structure for enhancing rotation stability of fan blades

Abstract

The utility model belongs to the technical field of fan blades, and particularly relates to a support structure for enhancing rotation stability of fan blades. Comprising a support, a metal sheet and a magnet, a hollow installation groove is formed in the center of the support, the metal sheet is embedded in the inner side wall of the installation groove, the magnet is arranged in the installation groove and connected with the metal sheet in a magnetic attraction mode, a groove is formed in the rim face of the foot pad, and the foot pad is arranged in the groove. A plurality of hemispherical protruding points are arranged on the side face, horizontal to the radial face of the foot pad, of the groove, a plurality of pincer-shaped supporting legs are arranged on the outer side of the support, a plurality of hemispherical round grooves are correspondingly formed in the pincer-shaped supporting legs, the upper side edge and the lower side edge of each supporting leg are attached to the two side edges of the groove in a sliding mode, and the protruding points are matched with the round grooves in a clamped mode. Support vibration can be reduced, magnet displacement can be prevented, and fan blade rotation stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan blades, and in particular relates to a bracket structure for enhancing the rotation stability of fan blades. Background Art

[0002] A general bearing fan has a magnet at the bottom of the fan shaft core, which attracts the shaft core to prevent the fan blades from jumping in the axial direction when rotating, which affects the normal operation of the fan. This design helps the fan blades maintain a good stable state regardless of the angle when the electric fan is running, thereby reducing the movement and pressure of the shaft center, increasing the smoothness of operation, and reducing the vibration and noise generated when the fan blades are running. This structure requires a metal shell that can be attracted by the magnet to be installed and fixed at the bottom of the magnet to fix the magnet, so that the magnet and the metal shell attract each other. Since the metal shell is fixed, the magnet is eventually attracted to the metal shell.

[0003] Since the installation of the metal shell in the existing solution has certain installation requirements, the opening direction of the metal shell cylinder must face upward. Due to the small size of the metal shell, it is difficult to install it. It is easy to turn the metal shell upside down during installation, and it is difficult to remove the metal shell after turning it upside down, which affects the assembly of subsequent processes. At the same time, when the fan is used on some mechanical equipment, since the mechanical equipment will generate vibration when working, under the action of long-term vibration, the metal shell and the magnet may gradually move outward, causing unstable rotation of the fan blades.

[0004] Based on this, a bracket structure is proposed to enhance the rotation stability of the fan blades, so that the magnet can be installed more conveniently and magnetically attracted under the shaft core, and it is not easy to be displaced under long-term vibration. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides a bracket structure for enhancing the rotation stability of fan blades.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] The utility model discloses a bracket structure for enhancing the rotation stability of fan blades, comprising a bracket, a metal sheet and a magnet. A hollow installation groove is arranged at the center of the bracket, the metal sheet is embedded in the inner wall of the installation groove, and the magnet is arranged in the installation groove and is magnetically connected to the metal sheet.

[0008] Furthermore, the mounting groove is provided with an external thread, the magnet is cylindrical and an internal thread matching the external thread is provided on the rim surface.

[0009] Furthermore, a straight groove is provided on the upper end surface of the magnet.

[0010] Furthermore, the mounting groove includes a threaded section and a mounting section, the mounting section is located below the threaded section, and the bottom of the external thread of the threaded section abuts against the top of the magnet.

[0011] Furthermore, it includes a foot pad, the rim surface of which is surrounded by a groove, the side of the groove parallel to the radial surface of the foot pad is provided with a plurality of hemispherical protrusions, the outer side of the bracket is provided with a plurality of clamp-shaped legs, the clamp-shaped legs are correspondingly provided with a plurality of hemispherical circular grooves, the upper and lower side edges of the legs are slidably fitted with the side edges of the groove, and the protrusions and the circular grooves are snap-fitted.

[0012] Furthermore, the foot pad is made of rubber.

[0013] The beneficial effects of the utility model are:

[0014] (1) The magnet is fixed by magnetic attraction through the metal sheet to prevent it from displacement. When the fan blade rotates, the magnet will generate magnetic attraction force on the fan blade axis, which can prevent the fan blade from jumping up and down due to airflow or external force when the fan blade rotates, reduce the generation of noise and vibration, and improve the stability of fan rotation;

[0015] (2) The bracket is provided with a plurality of clamp-shaped legs engaged with the foot pads. After the clamp-shaped legs are engaged with the grooves of the foot pads, the hemispherical protrusions in the grooves of the foot pads abut against the hemispherical circular grooves on the clamp-shaped legs one by one. Then, a plurality of hemispherical protrusions are engaged with a plurality of hemispherical circular grooves to form a plurality of abutment surfaces, so that the bracket is difficult to move in the horizontal direction, and the horizontal vibration is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is the structural explosion diagram of the utility model;

[0018] Figure 2 It is a side sectional view of the utility model;

[0019] Figure 3 for Figure 2 A partial enlarged view of point B in the middle;

[0020] Figure 4 It is a structural schematic diagram of the bracket of the utility model;

[0021] Figure 5 It is a side sectional view of the bracket of the utility model;

[0022] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0023] Figure 7 It is a side structural schematic diagram of the foot pad of the utility model.

[0024] Legend: 1. Fan blade; 2. Magnetic ring; 3. Stator assembly; 4. Bearing; 5. Washer; 6. Retaining ring; 7. Spring clip; 8. Magnet; 9. Bracket; 10. Foot pad; 11. Metal sheet. DETAILED DESCRIPTION

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0026] like Figure 1-7 As shown, a bracket 9 structure of the utility model for enhancing the rotation stability of the fan blade 1 includes a bracket 9, a metal sheet 11 and a magnet 8. A hollow mounting groove is provided at the center of the bracket 9, the metal sheet 11 is embedded in the inner wall of the mounting groove, and the magnet 8 is provided in the mounting groove and is magnetically connected to the metal sheet 11;

[0027] After the magnet 8 is installed in the mounting groove, the spring piece 7, the buckle ring 6, the washer 5 and the bearing 4 are installed in the mounting groove in sequence, and then the stator assembly 3 and the magnetic ring 2 are sleeved on the bracket 9. Finally, the axis of the fan blade 1 is inserted into the mounting groove so that the bottom of the axis is magnetically attracted to the magnet. By embedding a metal sheet 11 in the mounting groove, the magnet 8 is magnetically fixed by the metal sheet 11 to prevent it from being displaced. When the fan blade 1 rotates, the magnet 8 will generate a magnetic attraction force on the axis of the fan blade 1, which can prevent the fan blade 1 from jumping up and down due to airflow or external force when the fan blade 1 rotates, reduce the generation of noise and vibration, and improve the stability of the fan rotation.

[0028] However, in the prior art, the magnet 8 needs to be fixed by a metal shell, and the installation requirements of the metal shell are high. When assembling the metal shell, it is easy for the metal shell to get stuck in the plastic tube and fail to reach the correct installation position, which affects the assembly of subsequent processes and reduces production efficiency. By replacing the original metal shell with a metal sheet 11 and nesting it on the bracket 9 by plastic-coating injection molding, installation errors during the installation process can be effectively avoided, the assembly process is reduced, and production efficiency is improved. At the same time, the metal sheet 11 has a simple manufacturing process, is easier to produce, and has a lower manufacturing cost than the metal shell, which can improve production efficiency.

[0029] Since fans are often used to dissipate heat for mechanical equipment in the industrial field, they are usually installed on mechanical equipment. Mechanical equipment will generate large vibrations when in use. Long-term vibrations are likely to cause damage to the internal structure of the fan. If the magnet 8 is simply magnetically attracted to the metal sheet 11, the magnet 8 will be displaced under the action of long-term vibrations. When the magnet 8 is displaced, the fan blade 1 will not be installed properly. The rotation of the fan blade 1 will generate large noise and vibration, which is not conducive to the long-term use of the fan. Therefore, an external thread is provided on the installation groove, the magnet 8 is cylindrical, and an internal thread matching the external thread is provided on the rim surface;

[0030] Since the material of the magnet 8 is relatively brittle, it is not suitable to set too many internal threads on the magnet 8 to prevent the internal threads from collapsing or breaking. Therefore, the thread lead angle of the internal thread and the external thread is relatively large, which can be more than 45°, and can be a double thread structure. When installing the magnet 8, the internal thread on the magnet 8 and the external thread on the installation groove are meshed and rotated with each other, so that the magnet 8 is rotated downward along the direction of the external thread until the magnet 8 and the metal sheet 11 are magnetically attached and fixed. After the magnet 8 is installed in place, the magnet 8 will not only generate magnetic attraction to fix the metal sheet 11, but the engagement of the internal thread and the external thread will also provide vertical and vertical directions to the magnet 8. When the magnet 8 is vibrated and tends to move outward, the magnet 8 needs to overcome forces in multiple directions. Compared with the fixing effect of the magnet 8 only by magnetic attraction, the threaded connection plus the magnetic connection is more stable.

[0031] Since the magnet 8 is small in size and needs to be completely installed in the installation groove, in order to facilitate the installation of the magnet 8, a straight groove is opened on the upper end surface of the magnet 8, and then the magnet 8 can be rotated into the installation groove by a screwdriver or an installation tool during installation. Since the magnet 8 itself has magnetic force, the magnet 8 can be first adsorbed on the tool by a metal tool and then installed, so that the magnet 8 can be quickly installed.

[0032] After the magnet 8 is installed into the installation groove through the internal and external threads, in order to further fix the magnet 8, the installation groove is divided into a threaded section and an installation section, the installation section is located below the threaded section, and the bottom of the external thread of the threaded section abuts against the top of the magnet 8;

[0033] The height of the mounting section is the same as the length of the magnet 8. Since the thread of the threaded section is an external thread, the external thread protrudes outward from the inner arc surface of the mounting groove. After the magnet 8 passes through the threaded section and rotates downward to the mounting section, the magnet 8 is located below the threaded section and continues to rotate, and the top of the magnet 8 is abutted against the bottom of the protruding external thread. On the one hand, the magnet 8 is subjected to the magnetic attraction of the metal sheet 11, and on the other hand, the magnet 8 is abutted against the magnet 8 by the bottom of the external thread. Therefore, the installation of the magnet 8 is more stable, and the rotation of the fan blade 1 is also more stable if the magnet 8 does not move.

[0034] In addition to fixing the magnet 8 by the metal sheet 11, in order to improve the rotation stability of the fan blade 1, it is also necessary to reduce the vibration of the fan bracket 9 itself. Therefore, in one embodiment, it also includes a foot pad 10, and a groove is formed around the rim surface of the foot pad 10. The side of the groove parallel to the radial surface of the foot pad 10 is provided with a plurality of hemispherical protrusions. The outer side of the bracket 9 is provided with a plurality of clamp-shaped legs, and the clamp-shaped legs are correspondingly provided with a plurality of hemispherical circular grooves. The upper and lower sides of the legs are slidably fitted with the two sides of the groove, and the protrusions and the circular grooves are snap-fitted.

[0035] The foot pad 10 is used to be installed on machinery and equipment or the side wall of a building that requires heat dissipation and exhaust, and the foot pad 10 is fixed by connecting parts such as screws or bolts. The side cross-section of the foot pad 10 is an I-shape, and the bracket 9 is provided with a plurality of clamp-shaped legs that are clamped with the foot pad 10. After the clamp-shaped legs are clamped into the grooves of the foot pad 10, the hemispherical protrusions in the grooves of the foot pad 10 are abutted and matched with the hemispherical circular grooves on the clamp-shaped legs one by one, and then multiple hemispherical protrusions are clamped with multiple hemispherical circular grooves to form multiple abutment surfaces, so that the bracket 9 is difficult to move in the horizontal direction, and the horizontal vibration is reduced. After the clamp-shaped legs and the foot pad 10 are installed, the foot pad 10 is fixed by screws or bolts. Compared with the general annular foot pad 10, it can provide better vibration reduction effect and reduce the displacement of the bracket 9 under vibration. The part of the foot pad 10 and the clamp-shaped legs that are clamped is a hollow structure, which can also play a buffering role in the horizontal direction of the bracket 9, thereby improving the stability of the bracket 9.

[0036] In one embodiment, the foot pad 10 is made of rubber material, and the width of the clamp-shaped leg is the same as the width of the groove of the foot pad 10. Therefore, the foot pad 10 is made of rubber material, and the groove of the foot pad 10 can produce a certain amount of deformation when the clamp-shaped leg is installed, so that the foot pad 10 can be quickly installed on the bracket 9.

[0037] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A support structure for enhancing the rotation stability of a fan blade, characterized in that: It includes a bracket, a metal sheet and a magnet. The center of the bracket is provided with a hollow installation groove. The metal sheet is embedded in the inner wall of the installation groove. The magnet is arranged in the installation groove and is magnetically connected to the metal sheet.

2. A support structure for enhancing the rotation stability of a fan blade according to claim 1, characterized in that: The mounting groove is provided with an external thread, the magnet is cylindrical and an internal thread matching the external thread is provided on the rim surface.

3. A support structure for enhancing the rotation stability of a fan blade according to claim 2, characterized in that: The upper end surface of the magnet is provided with a slot.

4. A support structure for enhancing the rotation stability of a fan blade according to claim 2, characterized in that: The installation groove comprises a threaded section and an installation section, wherein the installation section is located below the threaded section, and the bottom of the external thread of the threaded section abuts against the top of the magnet.

5. The support structure for enhancing the rotation stability of fan blades according to claim 1, characterized in that: It also includes a foot pad, a groove is formed around the rim surface of the foot pad, a plurality of hemispherical protrusions are provided on the side of the groove parallel to the radial surface of the foot pad, a plurality of clamp-shaped legs are provided on the outer side of the bracket, a plurality of hemispherical circular grooves are correspondingly provided on the clamp-shaped legs, the upper and lower side edges of the legs are slidably fitted with the two side edges of the groove, and the protrusions and the circular grooves are snap-fitted.

6. A support structure for enhancing the rotation stability of a fan blade according to claim 5, characterized in that: The foot pad is made of rubber.

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