Fan blade limiting mechanism

Abstract

A fan blade limiting mechanism relates to the technical field of fans, comprises a turntable and a fan blade rotationally arranged on the turntable, and is characterized in that a gasket is arranged between a rotating part of the fan blade and the turntable, the rotating part of the fan blade is provided with a guide groove, and a guide column is arranged on the gasket corresponding to the guide groove. Compared with the prior art, the utility model has the advantages that the abrasion caused by the relative rotation between the turntable and the rotating part of the fan blade can be avoided, and the smooth unfolding of the fan blade is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan blade limiting mechanism. Background Art

[0002] A conventional fan capable of storing fan blades comprises a turntable driven by a motor, a plurality of fan blades rotatably mounted on the turntable, a synchronization structure disposed between the turntable and the fan blades, and a light panel disposed below the turntable. When the fan stops operating, the plurality of fan blades are synchronously deployed under the combined action of centrifugal force and the synchronization structure, enabling the fan to operate normally. After the fan stops operating, the fan blades are pulled toward the turntable under the action of the rotational force of the recovery structure. The inner edges of the fan blades are then brought against the outer edges of the turntable under the action of the positioning structure of the recovery structure. The plurality of fan blades are connected end to end to form a circle and stored behind the light panel. In the conventional fan blades, the rotating portion of the fan blades is in direct contact with the turntable. During operation, the rotating portion of the fan blades inevitably rotates relative to the turntable. Since the turntable and the rotating portion of the fan blades are made of different materials (the turntable is metal, while the rotating portion of the fan blades is plastic), wear occurs during the relative rotation, resulting in inaccurate fit between the turntable and the rotating portion of the fan blades, thereby affecting the smooth deployment of the fan blades. Summary of the Invention

[0003] The purpose of the utility model is to provide a fan blade limiting mechanism which can avoid wear caused by relative rotation between a turntable and a rotating part of a fan blade and ensure smooth deployment of the fan blade.

[0004] The fan blade limiting mechanism of the present invention is realized in this way, including a turntable and a fan blade rotatably arranged on the turntable. The special feature of the present invention is that a gasket is arranged between the rotating part of the fan blade and the turntable, the rotating part of the fan blade is provided with a guide groove, and a guide column is provided on the gasket corresponding to the guide groove.

[0005] When in use, due to the use of a gasket, it is the gasket that makes the rotating part of the fan blade rotate relative to it. Therefore, by using appropriate gasket materials, the friction between the rotating part of the fan blade and the gasket can be reduced, and the wear can be reduced, thereby ensuring smooth rotation between the rotating part of the fan blade and the turntable.

[0006] Preferably, the gasket is made of plastic. Since the fan blade is also made of plastic, by using appropriate plastic material, the hardness and lubrication properties of the plastic can be enhanced, so that the friction and wear between the rotating part of the fan blade and the gasket are reduced, thereby ensuring smooth rotation between the rotating part of the fan blade and the turntable.

[0007] Preferably, the gasket includes an upper gasket and a lower gasket, the turntable is clamped between the upper gasket and the lower gasket, the rotating part of the fan blade includes a base with a guide groove and a fixed part with a female connector, a male connector is provided at the corresponding female connector on the base, the female connector of the fixed part passes through the turntable and is fixedly connected to the male connector on the base, the upper gasket and the lower gasket are positioned on the turntable, and the guide column provided on the gasket moves along the guide groove, thereby limiting the rotation amplitude of the fan blade.

[0008] Preferably, the upper gasket and the lower gasket are sheets with the same shape and structure, and the sheet includes a circular ring, columns and perforations symmetrically arranged on the circular ring, and the columns on the upper gasket and the lower gasket arranged above and below the turntable pass through the matching perforations on the turntable and then pass through the matching perforations on the lower gasket and the upper gasket respectively, wherein the columns passing through the perforations on the lower gasket become guide columns, and the fixed part connected to the fan blade base positions the lower gasket and the upper gasket between the base and the fixed part.

[0009] Preferably, the base of the fan blade is a polygonal convex head, the root of the polygonal convex head is a lower cylinder that matches the center hole of the circular ring of the lower gasket, the lower cylinder is positioned on the center hole of the circular ring of the lower gasket, and the fixed part of the fan blade is an upper cylinder with a polygonal hole that matches the polygonal convex head. The upper cylinder passes through the center holes of the upper gasket and the lower gasket and is sleeved on the polygonal convex head and the fixed part is fixed to the base by screws and nuts.

[0010] Compared with the prior art, the utility model has the advantage of avoiding wear caused by relative rotation between the turntable and the rotating part of the fan blades due to the adoption of the gasket, thereby ensuring smooth deployment of the fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the fan blade limiting mechanism of the utility model;

[0012] Figure 2 This is an exploded view of the fan blade limiting mechanism of the utility model;

[0013] Figure 3 It is a structural diagram of the fan blade base;

[0014] Figure 4 Schematic diagram of the structure of the gasket;

[0015] Figure 5 Schematic diagram of the structure of the fixed part of the fan blade

[0016] Figure 6 This is the status diagram when the fan is not working;

[0017] Figure 7 This is the state diagram of the fan when it is working.

[0018] Explanation of the reference numerals: A-rotation center; 1-turntable; 101-through hole; 2-fan blade; 201-rotating part; 2011-base; 2012-female connector; 2013-fixed part; 2014-male connector; 2015-lower cylinder; 2016-polygonal hole; 3-gasket; 301-upper gasket; 302-lower gasket; 303-annular object; 304-column; 305-through hole; 4-guide groove; 5-guide column; 6-screw; 7-nut; 8-spring. DETAILED DESCRIPTION

[0019] The fan blade limiting mechanism of the utility model is now described in further detail with reference to the accompanying drawings and embodiments:

[0020] The fan blade limiting mechanism of the present invention is implemented as follows: it includes a turntable 1 and a fan blade 2 rotatably arranged on the turntable 1. The special feature of the present invention is that a gasket 3 is arranged between the rotating part 201 of the fan blade 2 and the turntable 1, and a guide groove 4 is provided on the rotating part 201 of the fan blade 2. A guide column 5 is provided on the gasket 3 corresponding to the guide groove 4.

[0021] Preferably, the gasket 3 is made of plastic.

[0022] Preferably, the gasket 3 includes an upper gasket 301 and a lower gasket 302, and the turntable 1 is clamped between the upper gasket 301 and the lower gasket 302. The rotating part 201 of the fan blade 2 includes a base 2011 with an arc-shaped guide groove 4 with the rotation center A of the rotating part 201 as the center, and a fixed part 2013 with a female connector 2012. A male connector 2014 is provided on the base 2011 corresponding to the female connector 2012. The female connector 2012 of the fixed part 2013 passes through the turntable 1 and is fixedly connected to the male connector 2014 on the base 2011, positioning the upper gasket 301 and the lower gasket 302 on the turntable 1. The guide column 5 provided on the gasket 3 moves along the guide groove 4, thereby limiting the rotation amplitude of the fan blade 2.

[0023] Preferably, the upper gasket 301 and the lower gasket 302 are sheets with the same shape and structure, which include a circular ring 303, columns 304 and perforations 305 symmetrically arranged on the circular ring 303. The columns 304 on the upper gasket 301 and the lower gasket 302 arranged above and below the turntable 1 pass through the matching perforations 101 on the turntable 1 and then pass through the matching perforations 305 on the lower gasket 302 and the upper gasket 301 respectively. The columns 304 passing through the perforations 305 on the lower gasket 302 become guide columns, and the fixed part 2013 connected to the base 2011 of the fan blade 2 positions the lower gasket 302 and the upper gasket 301 between the base 2011 and the fixed part 2013.

[0024] Preferably, the base 2011 of the fan blade 2 is a polygonal convex head, the root of the polygonal convex head is a lower cylinder 2015 that matches the center hole of the circular ring 303 of the lower gasket 302, and the lower cylinder 2015 is positioned on the center hole of the circular ring 303 of the lower gasket 302. The fixed part 2013 of the fan blade 2 is an upper cylinder with a polygonal hole 2016 that matches the polygonal convex head serving as the base 2011. The upper cylinder serving as the fixed part 2013 passes through the center holes of the upper gasket 301 and the lower gasket 302 and is then sleeved on the polygonal convex head serving as the base 2011 and fixedly connected to the base 2011 by screws 6 and nuts 7.

[0025] like Figure 6 As shown, when the fan is not working, the fan blade 2 is in a stowed state under the action of the spring 8 connected to the fixed part 2013 and the fan blade limiting mechanism (including the guide groove 4 and the guide column 5) provided at the rotating end of the fan blade 2.

[0026] During operation, under the action of centrifugal force, the fan blades 2 unfold and rotate and unfold along the rotation center A of the fan blades 2. Due to the use of the gasket 3, it is the gasket 3 that makes the rotating part of the fan blade 2 rotate relative to it. Therefore, by using an appropriate material for the gasket 3, the friction between the rotating part 201 of the fan blade 2 and the gasket 3 can be reduced, and the wear is reduced, thereby ensuring smooth rotation between the rotating part 201 of the fan blade 2 and the turntable 1.

Claims

1. A fan blade limiting mechanism, comprising a turntable and a fan blade rotatably arranged on the turntable, characterized in that: A gasket is provided between the rotating part of the fan blade and the turntable, the rotating part of the fan blade is provided with a guide groove, and a guide column is provided on the gasket corresponding to the guide groove.

2. The fan blade limiting mechanism according to claim 1, characterized in that: The gasket includes an upper gasket and a lower gasket, and the turntable is clamped between the upper gasket and the lower gasket. The rotating part of the fan blade includes a base with a guide groove and a fixed part with a female connector. A male connector is provided at the corresponding female connector on the base. The female connector of the fixed part passes through the turntable and is fixedly connected to the male connector on the base. The upper gasket and the lower gasket are positioned on the turntable, and the guide column provided on the gasket moves along the guide groove, thereby limiting the rotation amplitude of the fan blade.

3. The fan blade limiting mechanism according to claim 2, characterized in that: The upper gasket and the lower gasket are sheets with the same shape and structure. The sheet includes a circular ring, columns and perforations symmetrically arranged on the circular ring. The columns on the upper gasket and the lower gasket arranged above and below the turntable pass through the matching perforations on the turntable and then pass through the matching perforations on the lower gasket and the upper gasket respectively. The columns passing through the perforations on the lower gasket become guide columns, and the fixed part connected to the base of the fan blade positions the lower gasket and the upper gasket between the base and the fixed part.

4. The fan blade limiting mechanism according to claim 1, 2 or 3, characterized in that: The base of the fan blade is a polygonal convex head. The root of the polygonal convex head is a lower cylinder that matches the center hole of the circular ring of the lower gasket. The lower cylinder is positioned on the center hole of the circular ring of the lower gasket. The fixed part of the fan blade is an upper cylinder with a polygonal hole that matches the polygonal convex head. The upper cylinder passes through the center holes of the upper gasket and the lower gasket and is then sleeved on the polygonal convex head and the fixed part is fixed to the base by screws and nuts.

5. The fan blade limiting mechanism according to claim 1, 2 or 3, characterized in that: The material of the gasket is plastic.

6. The fan blade limiting mechanism according to claim 4, characterized in that: The material of the gasket is plastic.

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