Blade with brake function and vertical fan

Abstract

The invention provides a blade with a braking function and a vertical motor. The blade with the brake function comprises a body part, a brake part and a brake part, the surface of one side of the body part is provided with a step part, and the surface of the other side of the body part is used for being connected with a main shaft of a fan; the baffle is arranged on at least partial area of the step part, one end of the baffle is a pivoting end, and the pivoting end is in pivoting connection with the body part; the elastic connecting piece is arranged between the body part and the baffle in a length-adjustable mode, one end of the elastic connecting piece is connected with the body part, the other end of the elastic connecting piece is connected with the baffle, and the elastic connecting piece is used for enabling the baffle to be attached to the step part. The blade brake assembly solves the problem that in the prior art, a blade brake assembly of a vertical fan is complex in structure.

Description

Technical Field

[0001] The present invention relates to the technical field of large fans, and more particularly, to a blade with a braking function and a vertical fan. Background Art

[0002] The H-type vertical axis wind turbine has become an important technology in the field of wind energy utilization due to its unique structure and high efficiency in small wind power generation systems. The characteristics of this type of wind turbine are that the blades have an equal cross-section design and no twist angle, which simplifies the manufacturing process but also brings a key problem: in an environment with high wind speeds, due to the increase in blade loads, the motor and support structure must bear additional mechanical stress, which not only requires high strength of the material but also increases the manufacturing cost and maintenance difficulty of the whole machine. To solve the problem of the out-of-control rotation speed of the wind turbine under high-speed winds, two braking mechanisms are generally adopted at present: electromagnetic short-circuit braking and mechanical braking. However, the electromagnetic short-circuit braking has limited braking torque under high wind speeds, and there is a risk of not being able to brake the wind wheel or even causing overheating and damage of the motor. Especially when the wind speed exceeds the design limit, the motor may burn out due to overload, causing irreversible damage to the wind turbine. Mechanical braking often requires a large-sized brake disc to achieve the braking effect, which not only increases the weight of the unit but also, due to the instantaneous impact force during braking, affects the integrity and long-term stability of the entire system structure. As can be seen from the above, there is a problem of complex structure of the blade braking assembly of the vertical fan in the prior art. Summary of the Invention

[0003] The main object of the present invention is to provide a blade with a braking function and a vertical fan to solve the problem of complex structure of the blade braking assembly of the vertical fan in the prior art.

[0004] To achieve the above object, according to one aspect of the present invention, there is provided a blade with a braking function, including: a main body portion, one side surface of the main body portion has a stepped portion, and the other side surface of the main body portion is used for connecting with the main shaft of the fan; a baffle, the baffle is arranged on at least part of the stepped portion, one end of the baffle is a pivot end, and the pivot end is pivotally connected with the main body portion; an elastic connecting member, the length of the elastic connecting member is adjustably arranged between the main body portion and the baffle, one end of the elastic connecting member is connected to the main body portion, and the other end of the elastic connecting member is connected to the baffle, and the elastic connecting member is used for making the baffle fit on the stepped portion.

[0005] Further, the stepped portion includes a first stepped surface and a second stepped surface arranged in sequence, the first stepped surface and the second stepped surface have a height difference, the main body portion further includes a pivot shaft, the pivot shaft is arranged inside the main body portion, and the pivot shaft is arranged at the junction of the first stepped surface and the second stepped surface, and the pivot end is pivotally connected with the pivot shaft.

[0006] Further, the pivot shaft portion extends out of the main body portion, and a connecting ring is provided on the baffle, and the connecting ring is sleeved on the pivot shaft.

[0007] Further, in the direction of the height difference, the first step surface is higher than the second step surface, and the baffle covers the second step surface.

[0008] Further, the elastic connecting member partially extends into the main body portion, and an avoidance hole is provided on the second step surface for avoiding the elastic connecting member. One side of the baffle facing the main body portion is attached to the second step surface, and the side of the baffle away from the main body portion is flush with the first step surface.

[0009] Further, both the elastic connecting members and the avoidance holes are multiple. The multiple elastic connecting members and the multiple avoidance holes correspond one by one or one avoidance hole corresponds to multiple elastic connecting members.

[0010] Further, the blade with a braking function further includes a counterweight, and the counterweight is arranged on the side of the baffle facing the main body portion.

[0011] Further, the counterweight is a counterweight block or a counterweight hammer. When the counterweight is a counterweight block, the counterweight block is arranged at the tail end of the baffle, and the tail end is arranged opposite to the pivot end; when the counterweight is a counterweight hammer, the distance between the counterweight hammer and the pivot end is less than the distance between the counterweight hammer and the tail end of the baffle.

[0012] Further, the blade with a braking function further includes connecting seats. There are multiple connecting seats, and every two of them form a group. Any group of connecting seats is arranged between the baffle and the main body portion, and the two connecting seats in any group are respectively arranged on the main body portion and the baffle.

[0013] According to another aspect of the present invention, a vertical fan is provided, including: the blade with a braking function as described above; a main shaft, and the main shaft is connected to the blade with a braking function.

[0014] Applying the technical solution of the present invention, the blade with a braking function includes a main body part, a baffle, and an elastic connecting member. One side surface of the main body part has a stepped part, and the other side surface of the main body part is used to connect with the main shaft of the fan. The baffle is arranged on at least part of the stepped part. One end of the baffle is a pivoting end, and the pivoting end is pivotally connected to the main body part. The elastic connecting member is arranged between the main body part and the baffle with an adjustable length. One end of the elastic connecting member is connected to the main body part, and the other end of the elastic connecting member is connected to the baffle. The elastic connecting member is used to make the baffle fit on the stepped part. By arranging a stepped part on one side of the main body part, and the baffle is pivotally connected to the main body part through the pivoting end, so that the baffle can fit on the stepped part. The main body part and the baffle are connected by the elastic connecting member, and the other side of the main body part is connected to the main shaft. When the blade is installed, under the action of wind force, the blade drives the main shaft to rotate. When the wind force is small and the blade speed is low, the baffle fits on the stepped part under the pulling force of the elastic connecting member. And when the wind force is large and the blade speed is too high, due to the centrifugal force generated by the rotation of the blade being greater than the pulling force of the elastic connecting member, the baffle rotates relative to the stepped part, increasing the wind resistance of the blade, realizing braking and speed reduction. The technical solution of the present invention has a simple structure, does not need to set a braking motor, and reduces the cost, solving the problem of the complex structure of the blade braking assembly of the vertical fan in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0016] Figure 1 shows an exploded view of a blade with a braking function in a specific embodiment of the present invention; and

[0017] Figure 2 shows a schematic structural diagram of a state of a blade with a braking function in a specific embodiment of the present invention;

[0018] Figure 3 shows a schematic structural diagram of another state of a blade with a braking function in a specific embodiment of the present invention;

[0019] Figure 4 shows a schematic structural diagram of a blade with a braking function in a specific embodiment of the present invention provided with a counterweight;

[0020] Figure 5 shows a schematic structural diagram of a blade with a braking function in a specific embodiment of the present invention provided with a counterweight hammer;

[0021] Figure 6 shows a schematic structural diagram of a state of a blade with a braking function in another specific embodiment of the present invention;

[0022] Figure 7 The structural schematic diagram shows another state of the blade with a braking function in another specific embodiment of the present invention.

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 10. Body part; 11. First step surface; 12. Second step surface; 121. Avoidance hole; 13. Pivot shaft; 20. Baffle; 21. Pivot end; 22. Connecting ring; 30. Elastic connecting piece; 40. Counterweight piece; 50. Connecting seat. Detailed implementation manners

[0025] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0027] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the components themselves, but the above orientation terms are not used to limit the present invention.

[0028] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In order to solve the problem of the complex structure of the blade braking assembly of the vertical fan in the prior art, the present invention provides a blade with a braking function and a vertical motor. Among them, the following vertical fan includes the following blade with a braking function.

[0030] Such as Figures 1 to 5As shown in the figure, the blade with a braking function includes a body part 10, a baffle 20, and an elastic connecting member 30. One side surface of the body part 10 has a stepped portion, and the other side surface of the body part 10 is used for connecting to the main shaft of the fan. The baffle 20 is disposed on at least a partial area of the stepped portion. One end of the baffle 20 is a pivoting end 21, and the pivoting end 21 is pivotally connected to the body part 10. The elastic connecting member 30 is disposed between the body part 10 and the baffle 20 with an adjustable length. One end of the elastic connecting member 30 is connected to the body part 10, and the other end of the elastic connecting member 30 is connected to the baffle 20. The elastic connecting member 30 is used to make the baffle 20 fit on the stepped portion.

[0031] By providing a stepped portion on one side of the body part 10, the baffle 20 is pivotally connected to the body part 10 through the pivoting end 21, so that the baffle 20 can fit on the stepped portion. The elastic connecting member 30 is used to connect the body part 10 and the baffle 20. The other side of the body part 10 is connected to the main shaft. When the blade is installed, under the action of wind force, the blade drives the main shaft to rotate. When the wind force is small and the blade speed is low, the baffle 20 fits on the stepped portion under the pulling force of the elastic connecting member 30. When the wind force is large and the blade speed is too high, due to the centrifugal force generated by the rotation of the blade, the centrifugal force of the baffle 20 is greater than the pulling force of the elastic connecting member 30, and the baffle 20 rotates relative to the stepped portion, increasing the wind resistance of the blade and achieving braking and speed reduction. The technical solution of the present invention has a simple structure, does not require a braking motor, and reduces costs.

[0032] Furthermore, through this design, the out-of-control rotation of the blade can be effectively avoided. It not only reduces mechanical damage caused by wind force changes, but also reduces maintenance costs and extends the service life of the blade and the whole machine.

[0033] As Figures 1 to 5 shown, the stepped portion includes a first stepped surface 11 and a second stepped surface 12 arranged in sequence. The first stepped surface 11 and the second stepped surface 12 have a height difference. The body part 10 further includes a pivot shaft 13. The pivot shaft 13 is disposed inside the body part 10 and is disposed at the junction of the first stepped surface 11 and the second stepped surface 12. The pivoting end 21 is pivotally connected to the pivot shaft 13.

[0034] It should be noted that the leading edge and the trailing edge of the blade mentioned below respectively refer to Figure 2 the left side and the right side of the blade in Figure 2 . The thickness of the leading edge is greater than the thickness of the trailing edge, that is, the thickness of the blade gradually decreases along the direction from the leading edge to the trailing edge, that is

[0035] Specifically, the first stepped surface 11 and the second stepped surface 12 are respectively located at the leading edge and the trailing edge of the blade. The pivot shaft 13 is disposed within the body portion 10 and near the junction of the first stepped surface 11 and the second stepped surface 12, and a part of the pivot shaft 13 extends out of the body portion 10 and is pivotally connected to the pivot end 21 of the baffle 20. Optionally, the pivot shaft 13 is welded to the body portion 10 or connected by snap screws.

[0036] Meanwhile, the movement of the baffle 20 is smoother at different wind speeds, reducing the possible noise and vibration during movement, and improving the comfort and stability of the fan operation.

[0037] As Figure 1 shown, a part of the pivot shaft 13 extends out of the body portion 10, and a connection ring 22 is provided on the baffle 20. The connection ring 22 is sleeved on the pivot shaft 13.

[0038] Specifically, the connection ring 22 is integrally formed with the baffle 20. Optionally, a receiving groove for receiving the pivot shaft 13 is provided within the body portion 10. The pivot shaft 13 passes through the connection ring 22 and enters the receiving groove. External threads are provided at both ends of the pivot shaft 13, and nuts are used to cooperate with the external threads at both ends of the pivot shaft 13 to limit the baffle 20 and the pivot shaft 13, preventing the pivot shaft 13 from detaching from the blade or the baffle 20 from detaching from the pivot shaft 13.

[0039] In this embodiment, in the direction of the height difference, the first stepped surface 11 is higher than the second stepped surface 12, and the baffle 20 covers the second stepped surface 12.

[0040] Specifically, the thickness at the position of the first stepped surface 11 is greater than the thickness at the position of the second stepped surface 12, so as to facilitate the cooperation between the second stepped surface 12 and the baffle 20 to form a complete streamlined surface for the entire blade, thereby reducing the wind resistance during the normal rotation of the blade and facilitating the rotation of the blade. Optionally, the first stepped surface 11 is an arc surface, and the second stepped surface 12 is a flat surface.

[0041] As Figure 1 shown, a part of the elastic connecting member 30 extends into the body portion 10. An avoidance hole 121 is provided on the second stepped surface 12 for avoiding the elastic connecting member 30. The side of the baffle 20 facing the body portion 10 is in contact with the second stepped surface 12, and the side of the baffle 20 away from the body portion 10 is flush with the first stepped surface 11.

[0042] Specifically, the avoidance hole 121 is strip-shaped. In the initial state, the elastic connecting member 30 is substantially entirely located in the accommodation cavity within the main body portion 10. At this time, the elastic connecting member 30 has a tensile force, and the elastic connecting member 30 partially extending out of the avoidance hole 121 is connected to the baffle 20, so that the entire baffle 20 is tightened on the second step surface 12 through the elastic connecting member 30. The avoidance hole 121 being arranged in a strip shape facilitates accommodating a plurality of elastic connecting members 30, thereby further improving the effect of the baffle 20 fitting on the second step surface 12. Only when the blade speed further increases can the baffle 20 be opened under the action of centrifugal force. It can be understood that different numbers of elastic connecting members 30 can correspond to different limit speeds.

[0043] Furthermore, the tensile force F brought by the elastic connecting member 30 of the present invention satisfies: F = mW^2R. Where m is the mass of the baffle 20, W is the designed critical speed, generally 1.1 to 1.2 times the rated speed of a vertical fan, and R is the distance between the blade and the midline of the main shaft of the vertical fan. Therefore, when the designed critical speed W is different, the corresponding tensile force F is also different. When the speed of the fan exceeds the critical speed W, the centrifugal force generated by the baffle 20 is greater than the tensile force of the elastic connecting member 30 itself, the baffle 20 opens, and the elastic connecting member 30 is stretched.

[0044] It can be understood that when the speed of the main shaft exceeds the critical speed W, the centrifugal force of the baffle 20 will exceed the tensile force F of the elastic connecting member 30, causing the baffle 20 to rotate relative to the second step surface 12 and thus open. At this time, the gas flow is disordered at the position of the trailing edge of the blade, the resistance of the blade increases, and the lift decreases, thereby achieving pneumatic braking. The higher the speed of the blade, the greater the angle of rotation of the baffle 20 relative to the second step surface 12, the greater the pneumatic braking torque generated, and the better the braking effect. Compared with the traditional methods of setting an electromagnetic motor to achieve braking or setting a larger brake disc for braking, the present invention can utilize air, the power source of braking is stable, the braking effect is more reliable, and the overall mass and cost are lower.

[0045] Of course, in addition to being able to adapt to multiple elastic connecting members 30, the avoidance hole 121 arranged in a strip shape can also be arranged corresponding to one elastic connecting member 30. At this time, the elastic connecting member 30 is inclined relative to the baffle 20 or perpendicular to the baffle 20. This braking design with multi-point elastic connection can distribute the braking force more evenly, avoid stress concentration and structural damage that may be brought by single-point connection, and improve the wind resistance and durability of the blade.

[0046] In this embodiment, fixing rings are provided on both the side of the baffle 20 facing the second step surface 12 and inside the main body portion 10. The two ends of the elastic connecting member 30 respectively extend into the fixing rings to realize the hanging connection of the elastic connecting member 30 on the fixing rings, so as to facilitate the installation and replacement of the elastic connecting member 30.

[0047] In this embodiment, there are multiple elastic connectors 30 and multiple avoidance holes 121. The multiple elastic connectors 30 and the multiple avoidance holes 121 correspond one by one, or one avoidance hole 121 corresponds to multiple elastic connectors 30.

[0048] Specifically, two avoidance holes 121 are arranged at intervals along the length direction of the second step surface 12, and each avoidance hole 121 corresponds to one elastic connector 30. The number of fixing rings on the baffle 20 is the same as the number of elastic connectors 30.

[0049] As Figures 4 to 5 shown, the blade with a braking function further includes a counterweight 40. The counterweight 40 is arranged on the side of the baffle 20 facing the body portion 10.

[0050] Specifically, the setting of the counterweight 40 can increase the weight of the baffle 20. At this time, the tensile force that the elastic connector 30 can bring satisfies F = mW^2R, where m is the weight of the baffle 20 and the counterweight 40. The cooperation of the counterweight 40 and the baffle 20 can improve the pneumatic braking effect.

[0051] In this embodiment, the counterweight 40 is a counterweight block or a counterweight hammer. When the counterweight 40 is a counterweight block, the counterweight block is arranged at the tail end of the baffle 20, and the tail end is arranged opposite to the pivot end 21. When the counterweight 40 is a counterweight hammer, the distance between the counterweight hammer and the pivot end 21 is less than the distance between the counterweight hammer and the tail end of the baffle 20.

[0052] Specifically, by selecting the type and position of the counterweight 40, the moment of inertia of the blade can be effectively controlled, so that it can brake quickly and smoothly at different wind speeds. When the counterweight 40 is a counterweight block, the counterweight 40 and the baffle 20 are connected by welding or screws to ensure the reliability of the connection. Of course, the counterweight 40 and the baffle 20 can also be integrally formed, and the thickness of the end of the baffle 20 far from the pivot end 21 is increased to increase the weight of the baffle 20. In this way, the connection effect between the counterweight 40 and the baffle 20 is better. When the counterweight 40 is a counterweight hammer, the counterweight hammer is arranged on the baffle 20, and an avoidance hole 121 is also arranged at the position of the second step surface 12 corresponding to the counterweight to avoid the counterweight hammer.

[0053] As Figures 6 to 7 shown, in another alternative embodiment of the present invention, the blade with a braking function further includes a plurality of connecting seats 50. The plurality of connecting seats 50 are grouped in pairs. Any group of connecting seats 50 is arranged between the baffle 20 and the body portion 10, and the two connecting seats 50 in any group are respectively arranged on the body portion 10 and the baffle 20.

[0054] Specifically, any set of connecting seats 50 are respectively located on the baffle 20 and the second step surface 12. The elastic connecting piece 30 is in a contracted state and is inclined relative to the second step surface 12. The elastic connecting piece 30 can partially adhere to the second step surface 12 as Figure 6 shown. In this embodiment, there is no need to provide an avoidance hole 121 on the second step surface 12, and the elastic connecting piece 30 is located between the baffle 20 and the second step surface 12. The connecting seat 50 located on the baffle 20 is welded or integrally formed with the baffle 20, and the connecting seat 50 located on the second step surface 12 is welded or integrally formed with the second step surface 12.

[0055] Optionally, in the above embodiment, a connecting protrusion is provided on the pivoting end 21 of the baffle 20, and a receiving groove is provided on the body portion 10. The connecting protrusion extends into the receiving groove, so as to realize the pivoting connection between the baffle 20 and the body portion 10.

[0056] The present invention also provides a vertical fan. The vertical fan includes the above-mentioned blade with a braking function and a main shaft. The main shaft is connected to the blade with a braking function.

[0057] Specifically, there are multiple blades. One side of the multiple blades away from the step portion is fixedly connected to the main shaft, and the multiple blades are arranged at intervals in the circumferential direction of the main shaft. When the rotational speed of the main shaft exceeds the critical speed, the multiple blades can simultaneously open the baffle 20, thereby realizing pneumatic braking, avoiding the continuous increase of the rotational speed of the main shaft, causing excessive load on the blades, with obvious control effect and low cost.

[0058] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: By providing a blade with a braking function including a body portion 10, a baffle 20, and an elastic connecting member 30, one side surface of the body portion 10 has a stepped portion, and the other side surface of the body portion 10 is used to connect to the main shaft of the fan. The baffle 20 is disposed on at least a partial area of the stepped portion. One end of the baffle 20 is a pivot end 21, and the pivot end 21 is pivotally connected to the body portion 10. The elastic connecting member 30 is disposed between the body portion 10 and the baffle 20 with an adjustable length. One end of the elastic connecting member 30 is connected to the body portion 10, and the other end of the elastic connecting member 30 is connected to the baffle 20. The elastic connecting member 30 is used to make the baffle 20 fit on the stepped portion. By providing a stepped portion on one side of the body portion 10 and pivotally connecting the baffle 20 to the body portion 10 through the pivot end 21, the baffle 20 can fit on the stepped portion. The body portion 10 and the baffle 20 are connected by the elastic connecting member 30, and the other side of the body portion 10 is connected to the main shaft. When the blade is installed, under the action of wind force, the blade drives the main shaft to rotate. When the wind force is small and the blade speed is low, the baffle 20 fits on the stepped portion under the pulling force of the elastic connecting member 30. When the wind force is large and the blade speed is too high, since the centrifugal force generated by the rotation of the baffle 20 is greater than the pulling force of the elastic connecting member 30, the baffle 20 rotates relative to the stepped portion, increasing the wind resistance of the blade and achieving braking and speed reduction. The technical solution of the present invention has a simple structure, does not require a braking motor, and reduces costs.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0060] It should be noted that the terms "upper", "lower", etc. in the description, claims, and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0061] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A blade with a braking function, characterized in that, Comprising: A main body part (10), one side surface of the main body part (10) has a stepped part, and the other side surface of the main body part (10) is used for connecting with the main shaft of a blower; A baffle (20), the baffle (20) is arranged on at least part of the stepped part, one end of the baffle (20) is a pivot end (21), and the pivot end (21) is pivotally connected with the main body part (10); An elastic connecting piece (30), the elastic connecting piece (30) is arranged between the main body part (10) and the baffle (20) with an adjustable length, one end of the elastic connecting piece (30) is connected to the main body part (10), the other end of the elastic connecting piece (30) is connected to the baffle (20), and the elastic connecting piece (30) is used to make the baffle (20) fit on the stepped part.

2. The blade with a braking function according to claim 1, characterized in that, The stepped part includes a first stepped surface (11) and a second stepped surface (12) arranged in sequence, there is a height difference between the first stepped surface (11) and the second stepped surface (12), the main body part (10) further includes a pivot shaft (13), the pivot shaft (13) is arranged inside the main body part (10), and the pivot shaft (13) is arranged at the junction of the first stepped surface (11) and the second stepped surface (12), and the pivot end (21) is pivotally connected with the pivot shaft (13).

3. The blade with a braking function according to claim 2, wherein Part of the pivot shaft (13) extends out of the main body part (10), a connecting ring (22) is arranged on the baffle (20), and the connecting ring (22) is sleeved on the pivot shaft (13).

4. The blade with a braking function according to claim 2, wherein In the direction of the height difference, the first stepped surface (11) is higher than the second stepped surface (12), and the baffle (20) covers the second stepped surface (12).

5. The blade with a braking function according to claim 4, characterized in that, Part of the elastic connecting piece (30) extends into the main body part (10), an avoidance hole (121) is formed on the second stepped surface (12), the avoidance hole (121) is used to avoid the elastic connecting piece (30), one side of the baffle (20) facing the main body part (10) fits with the second stepped surface (12), and one side of the baffle (20) away from the main body part (10) is flush with the first stepped surface (11).

6. The blade with a braking function according to claim 5, characterized in that, Both the elastic connecting piece (30) and the avoidance hole (121) are multiple, and the multiple elastic connecting pieces (30) and the multiple avoidance holes (121) correspond one by one or one avoidance hole (121) corresponds to multiple elastic connecting pieces (30).

7. The blade with a braking function according to claim 1, characterized in that, The blade with a braking function further includes a counterweight (40), and the counterweight (40) is arranged on one side of the baffle (20) facing the main body part (10).

8. The blade with a braking function according to claim 7, characterized in that, The counterweight (40) is a counterweight block or a counterweight hammer. When the counterweight (40) is a counterweight block, the counterweight block is arranged at the tail end of the baffle (20), and the tail end is arranged opposite to the pivot end (21). When the counterweight (40) is a counterweight hammer, the distance between the counterweight hammer and the pivot end (21) is less than the distance between the counterweight hammer and the tail end of the baffle (20).

9. The blade with a braking function according to any one of claims 1 to 8, characterized in that, The blade with a braking function further includes connecting seats (50), and there are a plurality of the connecting seats (50). The plurality of connecting seats (50) are grouped in pairs. Any pair of the connecting seats (50) is arranged between the baffle (20) and the body part (10), and the two connecting seats (50) of any pair are respectively arranged on the body part (10) and the baffle (20).

10. A vertical fan, characterized in that, Comprising: The blade with a braking function according to any one of claims 1 to 9; A main shaft, which is connected to the blade with a braking function.

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