Silent fan

Abstract

The utility model relates to a noiseless fan, which comprises a rear cover body, a front cover body and a fan main body, the fan main body comprises a rotating shaft and a plurality of fan blades, the plurality of fan blades are uniformly distributed at intervals along the circumferential direction of the rotating shaft, one ends of the plurality of fan blades are fixedly connected on the rotating shaft, the other ends of the plurality of fan blades are fixedly connected with two noiseless rings, and the noiseless rings are fixedly connected on the rotating shaft. The two fan blades are distributed at the ends of the fan blades at intervals in the axial direction of the rotating shaft, the outer side of the fan body is covered with the rear cover body and the front cover body, and the rear cover body and the front cover body are detachably connected. The mute fan is mainly used for greatly reducing noise, achieving the purpose of muting, and meanwhile greatly improving installation efficiency.

Description

Technical Field

[0001] The utility model relates to a fan, in particular to a silent fan. Background Art

[0002] Fans are essential household appliances used to prevent heatstroke and cool down in daily life. They are also one of the essential components for heat dissipation in various mechanical equipment. Fans drive the blades to rotate to form flowing wind. When the blades rotate, their ends are prone to mechanical vibration due to cutting the air, which in turn generates noise. In addition, the long-term vibration of the blades is transmitted to the motor bearings, which will aggravate the bearing wear and shorten the service life of the fan. Therefore, it is necessary to improve the structure of the fan to reduce the vibration amplitude. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model aims to provide a silent fan which can greatly reduce noise, achieve the purpose of silence, and greatly improve the installation efficiency.

[0004] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0005] A silent fan comprises a rear cover, a front cover and a fan body, the fan body comprising a rotating shaft and a plurality of blades, the plurality of blades being evenly spaced along the circumference of the rotating shaft, and one end of the plurality of blades being fixedly connected to the rotating shaft, and the other end being fixedly connected to a silent ring, the silent ring having two, which are respectively spaced along the axial direction of the rotating shaft at the ends of the blades, the rear cover and the front cover are arranged on the outside of the fan body, and the rear cover and the front cover are detachably connected.

[0006] Furthermore, the distances between the two silent rings and adjacent sides of the fan blades are the same.

[0007] Furthermore, the width of the silent ring is 3-15 mm, and the thickness of the silent ring is 1-5 mm.

[0008] Furthermore, a mounting ring is fixedly provided at the open end of the front cover body, a fixing ring is fixedly provided at the open end of the rear cover body, a protruding positioning column is fixedly connected to the mounting ring, a sleeve is cooperatively provided on the fixing ring, the positioning column is plugged into the sleeve, and a detachable connection is achieved between the positioning column and the sleeve via a prefabricated fixture.

[0009] Furthermore, a through groove is provided on one side of the sleeve, and a notch is provided on one side of the positioning column at a position corresponding to the through groove. When the positioning column is inserted into the sleeve, the notch is communicated with the through groove. A slideway connected with the through groove is provided on the fixing ring, and the slideway extends along the circumference of the fixing ring. The prefabricated component includes a control button and a limit block. The control button is located on the outer sides of the rear cover body and the front cover body. One end of the limit block is fixedly connected to the control button, and the other end passes through the slideway and extends into the inner side of the fixing ring. An elastic member is connected between the limit block and the fixing ring. Under the action of the elastic member, the limit block moves along the slideway until it passes through the through groove and abuts against the notch of the positioning column.

[0010] Furthermore, the elastic member is a return spring.

[0011] Furthermore, the limit block and the slideway are in sliding fit, and the width dimension of the limit block close to one end of the sleeve is greater than the width dimension of the slideway.

[0012] Compared with the prior art, the beneficial effects of the utility model are: in the utility model, a silent ring is fixed at the end of the fan blade, and there are two silent rings symmetrically distributed along the width direction of the fan blade, which can stabilize the end of the fan blade well so that it does not vibrate when it rotates, thereby greatly reducing noise and achieving the purpose of silent operation; in addition, the installation method of the front cover body and the rear cover body is improved, and a pre-fixed device is added between the front cover body and the rear cover body to pre-fix the relative position of the front cover body and the rear cover body. The overall structural design is reasonable and ingenious, which can greatly improve the installation efficiency, reduce the difficulty of installation, and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an exploded schematic diagram of a silent fan of the utility model;

[0014] Figure 2 It is a side view of a fan cover in a silent fan of the utility model;

[0015] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure cut along the AA direction;

[0016] Figure 4 for Figure 3 A schematic diagram of the local enlarged structure at C in the middle;

[0017] Figure 5 It is a side view of a fan body in a silent fan of the utility model;

[0018] Among them, 1. rear cover; 11. fixing ring; 111. slideway; 12. sleeve; 121. through groove; 13. guide groove; 2. front cover; 21. mounting ring; 22. positioning column; 221. notch; 3. pre-fixed part; 31. control button; 32. limit block; 33. reset spring; 4. fan body; 41. fan blades; 42. mute ring; 43. shaft. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] It should be noted that, in the description of the technical solution of the present invention, some directional words used to clearly describe the technical features of the present invention, such as "front", "back", "up", "down", "top", "bottom", "inside", "outside", etc., are all in accordance with the orientation of the drawings of the present invention.

[0021] Example

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a silent fan of the present embodiment includes a rear cover body 1, a front cover body 2 and a fan body 4. The fan body 4 includes a rotating shaft 43 and a plurality of blades 41. The plurality of blades 41 are evenly spaced along the circumference of the rotating shaft 43, and one end of the plurality of blades 41 is fixedly connected to the rotating shaft 43. The rotating shaft 43 is fixedly connected to the output shaft of the driving mechanism. The driving mechanism drives the rotating shaft 43 to rotate through the output shaft, thereby driving the blades 41 to rotate to form wind. The driving mechanism adopts the motor driving mechanism in the prior art, which will not be described in detail here. The end of the blade 41 cuts the air and easily forms vortices and generates vibrations. In order to solve this problem, a silent ring 42 is fixedly connected to the other end of the blade 41 in the present embodiment. Figure 5 As shown, there are two silent rings 42, and the two silent rings 42 have the same structure. The two silent rings 42 are respectively distributed at the ends of the blades 41 along the axial direction of the rotating shaft 43, and the two silent rings 42 are symmetrically arranged relative to the axial center line of the blades 41, that is, the distances between the two silent rings 42 and the adjacent sides of the blades 41 are the same, so as to achieve gravity balance and avoid vibration when the fan body 4 rotates due to the center of gravity offset. The width of the silent ring 42 is 3-15mm, and the thickness of the silent ring 42 is 1-5mm. With this structural design, compared with the structure of fixing a silent ring at the center of the end of the blade 41 in the traditional technology, the silent ring 42 used in this embodiment is small in size and light in weight, and can also achieve a better effect of stabilizing the blades 41, greatly reducing the vibration of the ends of the blades 41 when rotating, thereby reducing the noise generated by the vibration and achieving the purpose of silence.

[0023] The rear cover 1 and the front cover 2 are arranged on the outside of the fan body 4, and in order to facilitate the installation, maintenance and cleaning of the fan body 4, the rear cover 1 and the front cover 2 are detachably connected. In this embodiment, a mounting ring 21 is fixedly provided at the open end of the front cover 2, and a fixing ring 11 is fixedly provided at the open end of the rear cover 1. The connection method between the mounting ring 21 and the fixing ring 11 adopts the bolt connection method in the prior art, which will not be repeated here. However, before installing the bolts, it is necessary to manually align and fix the position of the front cover 2 to smoothly carry out the bolt connection. Once the position of the front cover 2 is not aligned or the position of the front cover 2 is offset, the bolt connection cannot be smoothly carried out. In order to solve this problem, improve the installation efficiency and reduce the installation difficulty, in this embodiment, a protruding positioning column 22 is fixedly connected to the mounting ring 21, and a sleeve 12 is provided on the fixing ring 11. The positioning column 22 is plugged into the sleeve 12, and the positioning column 22 and the sleeve 12 are detachably connected through the prefabricated component 3. With this structural design, during installation, it is only necessary to insert the positioning column 22 into the sleeve 12 to align the positions of the rear cover body 1 and the front cover body 2, and then fix the relative positions of the positioning column 22 and the sleeve 12 through the pre-fixed parts 3, so that the relative positions of the rear cover body 1 and the front cover body 2 can be pre-fixed, and there is no need to manually press and fix the position of the front cover body 2, which greatly reduces the difficulty of installation and improves the user experience.

[0024] Reference Figure 4 As shown, a through groove 121 is provided on one side of the sleeve 12, and a notch 221 is provided on one side of the positioning column 22 at a position corresponding to the through groove 121. When the positioning column 22 is inserted into the sleeve 12, the notch 221 is connected with the through groove 121 to form a card groove, and a slideway 111 connected with the through groove 121 is provided on the fixing ring 11. The slideway 111 passes through the inner and outer side walls of the fixing ring 11, and the slideway 111 extends along the circumference of the fixing ring 11. The prefabricated part 3 includes a control button 31 and a limit block 32. The control button 31 is located outside the rear cover body 1 and the front cover body 2. The control button 31 can move along the outer peripheral surface of the rear cover body 1. One end of the limit block 32 is fixedly connected to the control button 31, and the other end passes through the slideway 111 and extends into the inner side of the fixing ring 11. When the control button 31 moves along the outer peripheral surface of the rear cover body 1, the limit block 32 also moves into the slot formed by the through groove 121 and the notch 221, or is separated from the slot formed by the through groove 121 and the notch 221, thereby realizing the relative position of the positioning column 22 and the sleeve 12. The limit block 32 and the slideway 111 are in sliding fit, and the width dimension of the limit block 32 near the end of the sleeve 12 is greater than the width dimension of the slideway 111 to prevent the limit block 32 from escaping from the slideway 111.

[0025] In this embodiment, an elastic member is connected between the limit block 32 and the fixed ring 11. Under the action of the elastic member, the limit block 32 moves along the slideway 111 until it passes through the through groove 121 and abuts against the notch 221 of the positioning column 22. Specifically, the elastic member is a return spring 33, one end of which is fixedly connected to the fixed ring 11, and the other end is fixedly connected to the limit block 32. The return spring 33 is in a compressed state when it is not under force. The rebound force drives the limit block 32 and the control button 31 to move into the slot formed by the through groove 121 and the notch 221 and abut against the side wall of the notch 221. In order to ensure that the moving trajectory of the return spring 33 and the limit block 32 is not offset, in this embodiment, a guide groove 13 is provided at a position corresponding to the return spring 33 on the inner side of the fixed ring 11. The guide groove 13 is connected to the through groove 121 to ensure the smooth movement of the limit block 32.

[0026] When installing the front cover 2 on the rear cover 1, first manually push the control button 31 to overcome the elastic force of the return spring 33 and move it away from the through slot 121 until the limit block 32 is completely separated from the through slot 121, then align the position of the positioning column 22 with the sleeve 12, and insert the positioning column 22 into the sleeve 12. After the insertion is completed, the control button 31 can be released. The control button 31 moves in the approaching direction under the elastic force of the return spring 33 until it is inserted into the slot formed by the through slot 121 and the notch 221 and abuts against the side wall of the notch 221. At this time, the relative positions of the front cover 2 and the rear cover 1 are pre-fixed, and the next step of bolt fixing and connection operation can be carried out.

[0027] The utility model provides a silent fan, a silent ring 42 is fixed at the end of the fan blade 41, and two silent rings 42 are symmetrically distributed along the width direction of the fan blade 41, which can stabilize the end of the fan blade 41 well so that it does not vibrate when it rotates, thereby greatly reducing noise and achieving the purpose of silent operation; in addition, the installation method of the front cover body 2 and the rear cover body 1 is improved, and a pre-fixed device 3 is added between the front cover body 2 and the rear cover body 1 to pre-fix the relative position of the front cover body 2 and the rear cover body 1. The overall structural design is reasonable and ingenious, which can greatly improve the installation efficiency, reduce the difficulty of installation, and enhance the user experience.

[0028] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model.

Claims

1. A silent fan, characterized in that: The invention comprises a rear cover (1), a front cover (2) and a fan body (4), wherein the fan body (4) comprises a rotating shaft (43) and a plurality of fan blades (41), wherein the plurality of fan blades (41) are evenly spaced along the circumference of the rotating shaft (43), and one end of the plurality of fan blades (41) is fixedly connected to the rotating shaft (43), and the other end is fixedly connected to a mute ring (42), wherein the mute ring (42) has two ends, which are spaced along the axial direction of the rotating shaft (43) and are respectively spaced at the ends of the fan blades (41), wherein the rear cover (1) and the front cover (2) are arranged on the outside of the fan body (4), and the rear cover (1) and the front cover (2) are detachably connected.

2. A silent fan according to claim 1, characterized in that: The distances between the two silent rings (42) and the sides of the adjacent fan blades (41) are the same.

3. A silent fan according to claim 2, characterized in that: The width of the silent ring (42) is 3-15 mm, and the thickness of the silent ring (42) is 1-5 mm.

4. The silent fan according to claim 1, characterized in that: A mounting ring (21) is fixedly provided at the open end of the front cover body (2), a fixing ring (11) is fixedly provided at the open end of the rear cover body (1), a protruding positioning column (22) is fixedly connected to the mounting ring (21), a sleeve (12) is matched with the fixing ring (11), the positioning column (22) is plugged into the sleeve (12), and a detachable connection is achieved between the positioning column (22) and the sleeve (12) via a prefabricated component (3).

5. A silent fan according to claim 4, characterized in that: A through groove (121) is provided on one side of the sleeve (12), a notch (221) is provided on one side of the positioning column (22) at a position corresponding to the through groove (121), when the positioning column (22) is inserted into the sleeve (12), the notch (221) is connected to the through groove (121), a slideway (111) connected to the through groove (121) is provided on the fixing ring (11), and the slideway (111) extends along the circumference of the fixing ring (11), and the prefabricated component (3) comprises a control A control button (31) and a limit block (32), wherein the control button (31) is located outside the rear cover body (1) and the front cover body (2), one end of the limit block (32) is fixedly connected to the control button (31), and the other end of the limit block (32) passes through the slideway (111) and extends into the inner side of the fixing ring (11), an elastic member is connected between the limit block (32) and the fixing ring (11), and under the action of the elastic member, the limit block (32) moves along the slideway (111) until it passes through the through groove (121) and abuts against the notch (221) of the positioning column (22).

6. A silent fan according to claim 5, characterized in that: The elastic member is a return spring (33).

7. The silent fan according to claim 5, characterized in that: The limit block (32) and the slideway (111) are in sliding engagement, and the width of the limit block (32) at one end close to the sleeve (12) is greater than the width of the slideway (111).

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