Windmill structure

Abstract

The utility model relates to a windmill structure which comprises a support which comprises a frame body and a rotating shaft. The reversing device comprises a first rocker arm and a second rocker arm, and the first rocker arm and the second rocker arm can synchronously pivot by a specific angle; the at least one first blade and the at least one second blade are respectively pivoted to two side edges of the frame body rotating shaft; the first rocker arm is linked with the first blade through the first connecting rod and the first swinging rod; the second rocker arm is linked with the second blade through a second connecting rod and a second swing rod; when wind blows to the first blade and the stressed area of the first blade is the largest, the stressed area of the second blade part is the smallest, so that compared with a vertical axis wind driven generator in the prior art, the vertical axis wind driven generator has higher rotating efficiency.

Description

Technical Field

[0001] The utility model relates to a windmill structure, in particular to a windmill structure used for a vertical axis wind driven generator. Background Art

[0002] Wind turbines in the prior art are mainly divided into two types, one is a horizontal axis wind turbine (HAWT) in which the rotating axis of the blades is parallel to the ground, and the other is a vertical axis wind turbine (VAWT) in which the rotating axis of the blades is perpendicular to the ground. Among them, because the axial direction of the rotating axis of the horizontal axis wind turbine is parallel to the wind direction, in order to effectively use the wind force to drive the rotating axis to rotate, a large bird-wing type blade is usually set at the front end of the rotating axis, and a tail wing is set at the rear end of the base. The tail wing is used to adjust the direction of the rotating axis with the wind direction. The vertical axis wind turbine uses wind force to rotate in a gyro-like manner, and the axial direction of its rotating axis is a fixed direction and does not change with the wind direction. The design principle of the vertical axis wind turbine is to use blades located on two opposite sides of the rotating axis. When subjected to wind force, the force applied to the blades on one side is greater than the force applied to the blades on the other side, thereby achieving the effect of the rotating axis being rotatable.

[0003] However, the aforementioned horizontal axis wind turbines are only suitable for installation in suburban areas due to their high cost, large land area, and annoying noise caused by the wind shearing sound of the fixed frequency when the blades rotate during operation, and the continuous dynamic shadows on the ground caused by the sun shining on the rotating blades, which can easily cause visual discomfort to people. The installation of the vertical axis wind turbines is affected by many environmental factors. Although the vertical axis wind turbines are not affected by the terrain and have low noise, they have a complex structure and a slower rotation speed than the horizontal axis wind turbines. Therefore, the overall structure of the vertical axis wind turbines has the above-mentioned problems and shortcomings, which need to be improved. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a windmill structure, wherein a first rocker arm and a second rocker arm can be synchronously pivoted to a specific angle, so that a first blade and a second blade can be synchronously pivoted.

[0005] In order to achieve the above-mentioned utility model purpose, the technical means adopted by the utility model is to design a windmill structure, which includes:

[0006] A bracket, comprising a frame and a rotating shaft, wherein the frame is a hollow frame, and the rotating shaft is fixed at the rotation center of the frame;

[0007] A reversing device, comprising a control seat, a first rocker arm and a second rocker arm, wherein the control seat is fixed on the rotating shaft, the first rocker arm and the second rocker arm are respectively formed with two pivot points, and the first rocker arm and the second rocker arm are respectively pivotally connected to the control seat at the position of one of the pivot points and can be pivoted synchronously;

[0008] At least one first blade, each of the first blades comprises a first shaft portion and a first sheet portion, the first sheet portion is fixedly mounted on the first shaft portion and forms an imaginary plane, the first blade is pivotally connected to the frame body by the first shaft portion and is located at one side of the rotating shaft;

[0009] At least one second blade, each of the second blades comprises a second shaft portion and a second sheet portion, the second sheet portion is fixedly mounted on the second shaft portion and forms an imaginary plane, the second blade is pivotally connected to the frame body by the second shaft portion and is located at the other side of the rotating shaft, and an angle is formed between the imaginary plane of the second sheet portion and the imaginary plane of the first sheet portion;

[0010] A first connecting rod, one end of which is pivotally connected to the other pivot point of the first rocker arm;

[0011] a second connecting rod, one end of which is pivotally connected to the other pivot point of the second rocker arm;

[0012] At least one first rocker, one end of each first rocker is pivotally connected to the first connecting rod, and the other end is fixed to the first shaft;

[0013] At least one second rocker, one end of each of the first rockers is pivotally connected to the second connecting rod, and the other end is fixed to the second shaft portion.

[0014] Furthermore, the windmill structure described, wherein the reversing device further includes a central axis and a plurality of stop members, the central axis is fixedly mounted on the control seat, the first rocker arm and the second rocker arm are integrally formed long strips, one end of the first rocker arm and the second rocker arm are connected to each other and the connection is pivotally connected to the central axis, each of the stop members is fixedly mounted on the control seat and is located on the swinging path of the first rocker arm and the second rocker arm, when the first rocker arm and the second rocker arm pivot synchronously, each of the stop members is used to abut against and limit the pivoting angle of the first rocker arm and the second rocker arm.

[0015] Furthermore, in the windmill structure, the distance between the two pivot points of the first rocker arm and the second rocker arm is the same, and the pivotable angle of the first rocker arm and the second rocker arm is 90 degrees, and the angle formed between the imaginary plane of the second sheet and the imaginary plane of the first sheet is 90 degrees.

[0016] Furthermore, in the windmill structure, the number of the first blades and the number of the second blades are several, the first connecting rod is penetrated by a plurality of first mounting holes, the number of the first mounting holes corresponds to the number of the first blades, the second connecting rod is penetrated by a plurality of second mounting holes, the number of the second mounting holes corresponds to the number of the second blades, the two ends of the first rocker arm are respectively penetrated by a first connecting hole, the first rocker arm is pivotally connected to the first mounting hole with one of the first connecting holes, and is fixed to the first shaft portion by sleeve-mounting the other first connecting hole, and the two ends of the second rocker arm are respectively penetrated by a second connecting hole, the second rocker arm is pivotally connected to the second mounting hole with one of the second connecting holes, and is fixed to the second shaft portion by sleeve-mounting the other second connecting hole.

[0017] Furthermore, the windmill structure, wherein the reversing device further includes a first gear and a second gear, the first gear and the second gear are rotatably disposed on the control seat and mesh with each other, the first gear is passed through and fixed with a first spindle, the first gear is pivotally connected to the control seat with the first spindle, the second gear is passed through and fixed with a second spindle, the second gear is pivotally connected to the control seat with the second spindle, one end of the first rocker arm is fixed on the first spindle, and the other end is pivotally connected to the first connecting rod, one end of the second rocker arm is fixed on the second spindle, and the other end is pivotally connected to the second connecting rod.

[0018] The advantages of the utility model are that the first connecting rod, the first rocking arm and the first blade are interconnected, and the second rocking arm and the second blade are interconnected through the second connecting rod, the second rocking arm; when the wind blows to the first blade and the force-bearing area of ​​the first blade is the largest, the force-bearing area of ​​the second blade is the smallest, so that the utility model has a higher rotation efficiency than the vertical axis wind turbine of the prior art; the first blade and the second blade have the same structure, so it is easy to mass produce and save costs; the rotation direction of the utility model is a fixed direction, so it can be rotated regardless of the wind direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the first embodiment of the utility model.

[0020] Figure 2 It is a partial enlarged side view of the first embodiment of the utility model.

[0021] Figure 3 It is a top view of the first embodiment of the utility model.

[0022] Figure 4 It is another top view of the first embodiment of the utility model.

[0023] Figure 5 It is a partial enlarged top view of the first embodiment of the utility model.

[0024] Figure 6 It is another partial enlarged top view of the first embodiment of the utility model.

[0025] Figure 7 It is a schematic diagram of stacking use of the first embodiment of the utility model.

[0026] Figure 8 It is a partial enlarged top view of the second embodiment of the utility model.

[0027] Fig. 9 It is a partial enlarged side view of the second embodiment of the utility model. DETAILED DESCRIPTION

[0028] The following is a combination of drawings and preferred embodiments of the present invention to further illustrate the technical means adopted by the present invention to achieve the intended purpose of the present invention.

[0029] See also Figure 1 and Figure 3 As shown, the windmill structure of the first embodiment of the utility model includes a bracket 10, a reversing device 20, at least one first blade 30, at least one second blade 40, a first connecting rod 50, a second connecting rod 60, at least one first rocker 70 and at least one second rocker 80.

[0030] The bracket 10 includes a frame 11 and a rotating shaft 12. The frame 11 is a rectangular hollow frame. The frame 11 includes an upper frame 111, a lower frame 112 and two side frames 113. The two side frames 113 are located between the upper frame 111 and the lower frame 112. The rotating shaft 12 is fixed to the upper frame 111 and the lower frame 112 of the frame 11 and is located at the rotation center of the frame 11. Specifically, the upper frame 111 and the lower frame 112 of the frame 11 are respectively penetrated by a through hole, the rotating shaft 12 is penetrated by the two through holes and fixed to each other, and the frame 11 and the rotating shaft 12 can rotate synchronously.

[0031] See also Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the reverse device 20 includes a control seat 21, a central axis 22, a first rocker arm 23, a second rocker arm 24 and a plurality of stoppers 25. The control seat 21 is a sheet having a fixing hole therethrough. The rotating shaft 12 is passed through the fixing hole and fixedly connected to the control seat 21. The control seat 21 is adjacent to the upper frame 111. The central axis 22 is uprightly fixed to the control seat 21. In the specific embodiment shown in the figure, the first rocker arm 23 and the second rocker arm 24 can be implemented as a long strip sheet. The two opposite ends of the long strip sheet are the first rocker arm 23 and the second rocker arm 24 respectively. One end of the first rocker arm 23 and the second rocker arm 24 are connected to each other, and the connection is pivotally connected to the central axis 22. The pivoting method is the prior art and is not described in detail. Each stopper 25 is a columnar The stoppers 25 are fixedly arranged upright on the control seat 21 at intervals and are located on the swing paths of the first rocker arm 23 and the second rocker arm 24. When the first rocker arm 23 and the second rocker arm 24 are synchronously and pivoted around the central axis 22, the stoppers 25 are used to abut against and limit the pivot angles of the first rocker arm 23 and the second rocker arm 24. In the present embodiment, the swing angle range of the first rocker arm 23 relative to the imaginary line formed by connecting the rotating shaft 12 and the central axis 22 (not necessarily on this extended line) and the swing angle range of the second rocker arm 24 relative to the imaginary line are both ±45 degrees, that is, the pivotable angle of the first rocker arm 23 and the second rocker arm 24 is 90 degrees, but this is not limited to this, and users of each component can change it according to their needs.

[0032] The first blade 30 includes a first shaft portion 31 and a first sheet portion 32. The first shaft portion 31 is a cylindrical body, and the first sheet portion 32 is a rectangular sheet body and is formed with an imaginary extension surface, which is fixed to the first shaft portion 31 with one side edge. The first blade 30 is pivotally connected to the frame 11 with the upper and lower ends of the first shaft portion 31 and is located on one side of the rotating shaft 12. Specifically, the upper frame 111 and the lower frame 112 of the frame 11 are respectively provided with a bearing (not shown in the figure) at the upper and lower pivot positions of the first shaft portion 31. The upper and lower ends of the first shaft portion 31 are respectively penetrated and fixed in the bearings, so that the first sheet portion 32 can rotate relative to the frame 11 with the first shaft portion 31 as the rotation center. In the present embodiment, the number of the first blades 30 is two and they are arranged at intervals, but it is not limited to this. It can also be only one or more. The number of the first blades 30 can be changed according to user needs.

[0033] The second blade 40 includes a second shaft portion 41 and a second sheet portion 42. The second shaft portion 41 is a cylindrical body, and the second sheet portion 42 is a rectangular sheet body and forms an imaginary plane, which is fixed to the second shaft portion 41 with one side. The second blade 40 is pivotally connected to the frame 11 with the upper and lower ends of the second shaft portion 41 and is located on the other side of the rotating shaft 12. Specifically, the upper frame 111 and the lower frame 112 of the frame 11 are respectively provided with a bearing at the upper and lower pivot positions of the second shaft portion 41. The upper and lower ends of the second shaft portion 41 are respectively penetrated and fixed in the bearings, so that the second sheet portion 42 can rotate relative to the frame 11 with the second shaft portion 41 as the rotation center. In the present embodiment, the number of the second blades 40 is two and they are arranged at intervals, but it is not limited to this. It can also be only one or several. The number of the second blades 40 can be changed according to user needs. An angle is formed between the imaginary plane extending from the second sheet portion 42 and the imaginary plane extending from the first sheet portion 32, and the preferred angle is 90 degrees.

[0034] The first connecting rod 50 is a bent rod body, which passes through at least one first mounting hole 51. The number of the first mounting holes 51 corresponds to the number of the first blades 30. One end of the first connecting rod 50 is pivotally connected to the first rocker arm 23. The pivoting method is a prior art and is not described in detail. The other end of the first connecting rod 50 is bent toward the first blade 30 and then bent toward the outer side of the frame 11. In this embodiment, Figure 3 As shown, two first mounting holes 51 are formed through the first connecting rod 50 .

[0035] The second connecting rod 60 is a bent rod body, which passes through at least one second mounting hole 61. The number of the second mounting holes 61 corresponds to the number of the second blades 40. One end of the second connecting rod 60 is pivotally connected to the second rocker arm 24. The pivoting method is a prior art and is not described in detail. The other end of the second connecting rod 60 extends obliquely toward the direction of the second blade 40, and then bends and extends toward the outer side of the frame 11. In this embodiment, Figure 3 As shown, two second mounting holes 61 are provided through the second connecting rod 60, and the distance between the pivot center point of the first rocker arm 23 and the first connecting rod 50 and the rotation center point of the central axis 22 is equal to the distance between the pivot center point of the second rocker arm 24 and the second connecting rod 60 and the rotation center point of the central axis 22.

[0036] The two ends of the first rocker arm 70 are respectively penetrated by a first connecting hole 71. The first rocker arm 70 corresponds to the first mounting hole 51 of the first connecting rod 50 and is pivotally connected to each other. The pivoting method is the prior art and is not described in detail. The other end is fixed to the first shaft portion 31 through the first connecting hole 71. The first rocker arm 70 can rotate relative to the first connecting rod 50. The first rocker arm 70 and the first shaft portion 31 rotate synchronously. In the present embodiment, the number of the first rocker arms 70 is two, and each first rocker arm 70 is connected to the first connecting rod 50 and each first shaft portion 31, but it is not limited to this. The number of the first rocker arms 70 can also be changed to one or more according to user needs. The distance between the pivot center point of the first shaft portion 31 and the center point of the first mounting hole 51 is equal to the distance between the pivot center point of the first rocker arm 23 and the first connecting rod 50 and the rotation center point of the central axis 22.

[0037] The two ends of the second rocker arm 80 are respectively penetrated by a second connecting hole 81. The second rocker arm 80 corresponds to the second mounting hole 61 of the second connecting rod 60 and is pivotally connected to each other. The pivoting method is the prior art and is not described in detail. The other end is sleeved and fixed to the second shaft portion 41 through the second connecting hole 81. The second rocker arm 80 can rotate relative to the second connecting rod 60, and the second rocker arm 80 rotates synchronously with the second shaft portion 41. In the present embodiment, the number of second rocker arms 80 is two, and each second rocker arm 80 is connected to the second connecting rod 60 and each second shaft portion 41, but it is not limited to this. The number of second rocker arms 80 can also be changed to one or more according to user needs. The distance between the pivot center point of the second shaft portion 41 and the center point of the second mounting hole 61 is equal to the distance between the pivot center point of the second rocker arm 24 and the second connecting rod 60 and the rotation center point of the central axis 22.

[0038] When using this utility model, please refer to Figure 1 and Figure 3 As shown, the user connects the bottom end of the rotating shaft 12 to a power generation device (not shown in the figure), and in the initial state, the first sheet 32 ​​is open and the second sheet 42 is closed, that is, Figure 3 In one embodiment shown in the figure, the angle between the imaginary plane formed by the extension of the second sheet 42 and the imaginary plane formed by the extension of the first sheet 32 ​​is 90 degrees, and the wind Figure 3 Taking the blowing from the upper side to the lower side of the figure as an example, when the wind blows toward the surface of the second sheet 42 in a direction perpendicular to the second sheet 42, since the second sheet 42 is perpendicular to the first sheet 32 ​​and the force-bearing area of ​​the second sheet 42 is greater than the force-bearing area of ​​the first sheet 32, the frame 11 rotates in a counterclockwise direction. When the frame 11 rotates, the force-bearing area of ​​the first sheet 32 ​​gradually increases, and the force-bearing area of ​​the second sheet 42 gradually decreases. Please refer to Figure 4As shown, the first sheet 32 ​​pivots and closes in the clockwise direction. When the first sheet 32 ​​pivots in the clockwise direction, the first shaft 31 drives the first rocker 70 to swing in the clockwise direction, and the first rocker 70 simultaneously pushes the first connecting rod 50 and the first rocker arm 23, so that the first rocker arm 23 and the second rocker arm 24 rotate synchronously in the clockwise direction, and the second connecting rod 60 connected to the second rocker arm 24 moves inward, so that the second rocker arm 80 also swings counterclockwise synchronously to open the second sheet 42. At this time, the wind blows toward the first sheet 32 ​​in the vertical direction. Because the force-bearing area of ​​the first sheet 32 ​​is larger than the force-bearing area of ​​the second sheet 42, the frame 11 rotates in the counterclockwise direction again. In this way, the first sheet 32 ​​and the second sheet 42 are continuously opened and closed alternately, so that the frame 11 can continuously rotate in the counterclockwise direction with the rotating shaft 12 as the rotation center, thereby achieving the effect of utilizing wind power for power generation.

[0039] In the above process, when the force-bearing area of ​​the first sheet 32 ​​is the largest, the force-bearing area of ​​the second sheet 42 is the smallest, so the rotation efficiency is high.

[0040] In the above process, since the first blade 30 and the second blade 40 have the same structure, they are easy to mass produce and save costs.

[0041] In the above process, the size and quantity of the first blade 30 and the second blade 40 can be changed according to the user's needs, so it has a high degree of customization.

[0042] In the above process, since the rotation direction of the utility model is a fixed direction, it can be rotated regardless of the wind direction.

[0043] In the above process, since the connected power generation devices are all set on the ground, the force on the rotating shaft 12 is small, the cost is low, and its service life can be extended.

[0044] See also Figure 7 As shown in the figure, the utility model is applied as a stacked assembly embodiment. The user can also connect several utility models in a stacked manner with the frame 11 to achieve the effect of synchronous rotation of the multi-layer structure. The stacking method is a prior art and is not described in detail. In the specific embodiment shown in the figure, the rotating shaft 12 is fixed with the frame 11 located at the lower layer and the frame 11 located at the upper layer, and the extension surface of the frame 11 at the lower layer and the extension surface of the frame 11 at the upper layer can be perpendicular to each other, and the assembly angle position can also be changed according to actual use requirements.

[0045] See also Figure 8 and Fig. 9FIG. 1 is an embodiment of the present invention, wherein the bracket 10, the first blade 30, the second blade 40 (not shown in the figure), the first connecting rod 50, the first rocking rod 70 and the second rocking rod 80 are the same as those of the first embodiment, and the main difference is that a first gear 27A, a second gear 28A, a first rocking arm 23A, a second rocking arm 24A, a second connecting rod 60A and a plurality of stoppers 25A are provided on the control seat 21 of the reverse device 20. The first gear 27A and the second gear 28A are rotatably provided on the control seat 21 and mesh with each other. Specifically, the first gear 27A A first spindle 271A is passed through and fixed, and the first gear 27A is pivotally connected to the control seat 21 by the first spindle 271A. A second spindle 281A is passed through and fixed to the second gear 28A, and the second gear 28A is pivotally connected to the control seat 21 by the second spindle 281A. One end of the first rocker arm 23A is fixed on the first spindle 271A, and the other end is pivotally connected to the first connecting rod 50. One end of the second rocker arm 24A is fixed on the second spindle 281A, and the other end is pivotally connected to the second connecting rod 60A. In this embodiment, the shape of the second connecting rod 60A is similar to that of the first connecting rod 50, so it is not repeated here.

[0046] See also Fig. 9 As shown, the second rocker arm 24A and the first rocker arm 23A are arranged one high and one low from the side to prevent the second rocker arm 24A and the first rocker arm 23A from interfering with each other when swinging. Figure 8 As shown, the extension line of the imaginary connection line of the two pivot points of the first rocker arm 23A and the extension line of the imaginary connection line of the two pivot points of the second rocker arm 24A viewed from above are perpendicular to each other, and the stoppers 25A are fixedly arranged upright at intervals on the control seat 21. In the present embodiment, the stoppers 25A are located on the swing paths of the first rocker arm 23A and the second rocker arm 24A to limit the swing angle range of the first rocker arm 23A and the second rocker arm 24A to 90 degrees. The distance between the two pivot points of the first rocker arm 23A is the same as the distance between the two pivot points of the second rocker arm 24A, but this is not limited to it. The user can make changes according to needs to achieve the effect of utilizing the first gear 27A and the second gear 28A to rotate in opposite directions to drive the first rocker arm 23A and the second rocker arm 24A to swing in opposite directions.

[0047] The above 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 person with ordinary knowledge in the technical field can make some changes or modifications to the technical contents disclosed above as equivalent embodiments of equivalent changes without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification 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 still falls within the scope of the technical solution of the present invention.

Claims

1. A windmill structure, characterized in that: Include: A bracket, comprising a frame and a rotating shaft, wherein the frame is a hollow frame, and the rotating shaft is fixed at the rotation center of the frame; A reversing device, comprising a control seat, a first rocker arm and a second rocker arm, wherein the control seat is fixed on the rotating shaft, the first rocker arm and the second rocker arm are respectively formed with two pivot points, and the first rocker arm and the second rocker arm are respectively pivotally connected to the control seat at the position of one of the pivot points and can be pivoted synchronously; At least one first blade, each of the first blades comprises a first shaft portion and a first sheet portion, the first sheet portion is fixedly mounted on the first shaft portion and forms an imaginary plane, the first blade is pivotally connected to the frame body by the first shaft portion and is located at one side of the rotating shaft; At least one second blade, each of the second blades comprises a second shaft portion and a second sheet portion, the second sheet portion is fixedly mounted on the second shaft portion and forms an imaginary plane, the second blade is pivotally connected to the frame body by the second shaft portion and is located at the other side of the rotating shaft, and an angle is formed between the imaginary plane of the second sheet portion and the imaginary plane of the first sheet portion; A first connecting rod, one end of which is pivotally connected to the other pivot point of the first rocker arm; a second connecting rod, one end of which is pivotally connected to the other pivot point of the second rocker arm; At least one first rocker, one end of each first rocker is pivotally connected to the first connecting rod, and the other end is fixed to the first shaft; At least one second rocker, one end of each of the first rockers is pivotally connected to the second connecting rod, and the other end is fixed to the second shaft portion.

2. The windmill structure according to claim 1, characterized in that: The reverse device further includes a central axis and several stop members, the central axis is fixedly mounted on the control seat, the first rocker arm and the second rocker arm are integrally formed long strips, one end of the first rocker arm and the second rocker arm are connected to each other and the connection is pivotally connected to the central axis, each of the stop members is fixedly mounted on the control seat and is located on the swinging path of the first rocker arm and the second rocker arm, when the first rocker arm and the second rocker arm pivot synchronously, each of the stop members is used to abut against and limit the pivoting angle of the first rocker arm and the second rocker arm.

3. The windmill structure according to claim 1 or 2, characterized in that: The distances between the two pivot points of the first rocker arm and the second rocker arm are the same, and the pivotable angles of the first rocker arm and the second rocker arm are 90 degrees, and the angle formed between the imaginary plane of the second sheet and the imaginary plane of the first sheet is 90 degrees.

4. The windmill structure according to claim 3, characterized in that: The number of the first blades and the number of the second blades are several, the first connecting rod is penetrated by several first mounting holes, the number of the first mounting holes corresponds to the number of the first blades, the second connecting rod is penetrated by several second mounting holes, the number of the second mounting holes corresponds to the number of the second blades, the two ends of the first rocker arm respectively penetrate a first connecting hole, the first rocker arm is pivotally connected to the first mounting hole with one of the first connecting holes, and is fixed to the first shaft portion by sleeve-mounting the other first connecting hole, the two ends of the second rocker arm respectively penetrate a second connecting hole, the second rocker arm is pivotally connected to the second mounting hole with one of the second connecting holes, and is fixed to the second shaft portion by sleeve-mounting the other second connecting hole.

5. The windmill structure according to claim 1, characterized in that: The reverse device further includes a first gear and a second gear, the first gear and the second gear are rotatably arranged on the control seat and mesh with each other, the first gear is passed through and fixed with a first spindle, the first gear is pivotally connected to the control seat with the first spindle, the second gear is passed through and fixed with a second spindle, the second gear is pivotally connected to the control seat with the second spindle, one end of the first rocker arm is fixed on the first spindle, and one end of the second rocker arm is fixed on the second spindle.

6. The windmill structure according to claim 5, characterized in that: The distances between the two pivot points of the first rocker arm and the second rocker arm are the same, and the pivotable angles of the first rocker arm and the second rocker arm are 90 degrees, and the angle formed between the imaginary plane of the second sheet and the imaginary plane of the first sheet is 90 degrees.

7. The windmill structure according to claim 6, characterized in that: The reverse device further includes a plurality of stoppers, each of which is fixed on the control seat and located on the swing path of the first rocker arm and the second rocker arm. When the first rocker arm and the second rocker arm pivot synchronously, each of the stoppers is used to abut against the first rocker arm and the second rocker arm and limit their pivoting angles.

8. The windmill structure according to claim 7, characterized in that: The number of the first blades and the number of the second blades are several, the first connecting rod is penetrated by several first mounting holes, the number of the first mounting holes corresponds to the number of the first blades, the second connecting rod is penetrated by several second mounting holes, the number of the second mounting holes corresponds to the number of the second blades, the two ends of the first rocker arm respectively penetrate a first connecting hole, the first rocker arm is pivotally connected to the first mounting hole with one of the first connecting holes, and is fixed to the first shaft portion by sleeve-mounting the other first connecting hole, the two ends of the second rocker arm respectively penetrate a second connecting hole, the second rocker arm is pivotally connected to the second mounting hole with one of the second connecting holes, and is fixed to the second shaft portion by sleeve-mounting the other second connecting hole.

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