Fan with adjustable blades

Abstract

The fan with the adjustable blades comprises a shell, a motor and the blades, an adjusting mechanism is arranged at the output end of the motor, and the interior of the adjusting mechanism is connected with the ends of the blades; the blade angle adjusting device is simple in structure and reasonable in design, flexible adjustment of the blade angle is achieved through the adjusting mechanism, in the adjusting process, the outer clamping shell and the inner clamping shell rotate reversely to drive the gears meshed with the first fluted disc and the second fluted disc, the blades rotate synchronously, the angle is changed, and the blade angle adjusting operation is easy and accurate through the design; in addition, a locking mechanism is arranged, the locking mechanism comprises an outer screw hole, an annular plate and an inner screw hole, and the outer clamping shell, the adjusting ring and the inner clamping shell are firmly connected through bolts, so that the air flow control capability and the adjusting efficiency of the fan are improved, and the adaptability and the using effect of equipment are enhanced. Relative movement of the adjusting mechanism in the operation process of the draught fan is prevented, the angle deviation phenomenon is avoided, and safe operation of the draught fan is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a fan with adjustable blades. Background Technology

[0002] Fans, as fluid transport and airflow control devices, are widely used in industry, agriculture, construction, environmental protection, and other fields. Based on their application, they can be divided into centrifugal fans, axial fans, mixed-flow fans, and cross-flow fans. Centrifugal fans generate pressure differences by changing the airflow direction and are suitable for high-pressure applications; axial fans propel airflow through rotating blades and are often used for large air volume and low air pressure requirements; mixed-flow fans combine the characteristics of both, providing higher air pressure and air volume. Fans can also be subdivided into ventilation, smoke extraction, cooling, and dust removal types. With technological advancements, fan designs have become more complex to meet the requirements of airflow, energy efficiency, and noise control in different applications, significantly impacting system operating efficiency and safety performance.

[0003] Existing fan blades are typically welded or fixedly installed, with their blade angles set to a fixed value during manufacturing, making adjustment impossible to meet the needs of different environments. This fixed-blade design has limitations in specific operating conditions. For example, at the same rotational speed, the fan's airflow, pressure, and power are directly related to the blade angle. The larger the blade angle, the greater the airflow and pressure. In applications requiring flexible airflow adjustment, existing fan designs struggle to provide effective solutions. Therefore, fan impellers with flexibly adjustable blade angles represent a crucial direction for addressing this issue, potentially significantly improving the fan's applicability and energy efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a fan with adjustable blades to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fan with adjustable blades, comprising a housing, a motor, and blades, wherein the output end of the motor is provided with an adjustment mechanism, and the interior of the adjustment mechanism is connected to the end of the blades;

[0006] The adjustment mechanism includes:

[0007] An outer clamping shell is provided with a rotating shaft at its center, the rotating shaft being connected to the output end of the motor, and a first gear disk being provided around the rotating shaft;

[0008] An adjusting ring is rotatably disposed on the side of the outer clamping shell. The ring wall of the adjusting ring is rotatably connected to the blade. A gear is provided at the end of the blade, and the gear meshes with the first gear disc.

[0009] The inner clamping shell is rotatably disposed on the other side of the adjusting ring. The center of the inner clamping shell is provided with a through hole to facilitate the passage of the rotating shaft. A second gear is provided around the through hole, and the second gear meshes with a gear.

[0010] A locking mechanism is provided on the outer clamping shell, the adjusting ring, and the inner clamping shell respectively. The locking mechanism is used to regulate the relative movement between the outer clamping shell, the adjusting ring, and the inner clamping shell.

[0011] Preferably, the locking mechanism includes:

[0012] External threaded holes are respectively formed on the outer clamping shell and the inner clamping shell;

[0013] The ring plates are respectively disposed on both sides of the adjusting ring, and the ring plates are provided with internal threaded holes that are adapted to the external threaded holes.

[0014] Preferably, a bearing is provided inside the through hole of the inner clamping shell, and the inner clamping shell is rotatably connected to the side wall of the rotating shaft through the bearing.

[0015] Preferably, the gear is a wide-face gear.

[0016] Preferably, a positioning part is provided on the inner side of the adjusting ring, and the positioning part is used to restrict the blade from moving outward of the adjusting ring.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This type of blade-adjustable fan allows for flexible adjustment of the blade angle through an adjustment mechanism. During the adjustment process, the outer and inner clamps rotate in opposite directions, driving the gears meshing with the first and second gear discs, causing the blades to rotate synchronously and change their angle. This design makes the blade angle adjustment operation simple and precise, thereby improving the fan's ability to control and regulate airflow, and enhancing the adaptability and performance of the equipment.

[0019] 2. This type of blade-adjustable fan is equipped with a locking mechanism, which includes an outer threaded hole, a ring plate, and an inner threaded hole. The outer clamping shell, adjusting ring, and inner clamping shell are firmly connected by bolts to prevent relative movement of the adjusting mechanism during the operation of the fan. This ensures that the blades can be stably locked after the angle is adjusted, avoids angle deviation, and ensures the safe operation of the fan. Attached Figure Description

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the shell of this utility model;

[0022] Figure 3This is a schematic diagram of the inner structure of the inner shell of this utility model;

[0023] Figure 4 This is a schematic diagram of the side structure of the outer clamping shell of this utility model;

[0024] Figure 5 This is a comparison diagram of the adjusting ring and its internal structure.

[0025] In the diagram: 1. Housing; 2. Motor; 3. Blade; 4. Adjustment mechanism; 401. Outer clamping shell; 402. Rotating shaft; 403. First gear plate; 404. Adjusting ring; 405. Gear; 406. Inner clamping shell; 407. Through hole; 408. Second gear plate; 409. Locking mechanism; 4091. External threaded hole; 4092. Ring plate; 4093. Internal threaded hole; 5. Bearing; 6. Positioning part. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0030] Example

[0031] Please see Figure 1-5 As shown, the present invention provides a technical solution for a fan with adjustable blades: a fan with adjustable blades includes a housing 1, a motor 2, and blades 3. The output end of the motor 2 is provided with an adjustment mechanism 4, and the interior of the adjustment mechanism 4 is connected to the end of the blades 3.

[0032] The adjusting mechanism 4 includes an outer clamping shell 401, an adjusting ring 404, an inner clamping shell 406, and a locking mechanism 409. A rotating shaft 402 is located at the center of the outer clamping shell 401, and the rotating shaft 402 is connected to the output end of the motor 2. A first gear 403 is mounted around the rotating shaft 402. The adjusting ring 404 is rotatably mounted on the side of the outer clamping shell 401, and its ring wall is rotatably connected to a blade 3. A gear 405 is mounted at the end of the blade 3, and the gear 405 meshes with the first gear 403. The inner clamping shell 406 is rotatably mounted on the other side of the adjusting ring 404. A through hole 407 is located at the center of the inner clamping shell 406 to facilitate the passage of the rotating shaft 402. A second gear 408 is located around the through hole 407, and the second gear 408 meshes with the first gear 403. Wheels 405 mesh with each other, and locking mechanisms 409 are respectively installed on the outer clamping shell 401, adjusting ring 404 and inner clamping shell 406. Locking mechanisms 409 are used to regulate the relative movement between the outer clamping shell 401, adjusting ring 404 and inner clamping shell 406. During the process of adjusting the angle of blade 3, it is necessary to ensure that the outer clamping shell 401, adjusting ring 404 and inner clamping shell 406 are in an unlocked state. Then, rotate the outer clamping shell 401 and inner clamping shell 406 in opposite directions (i.e., the outer clamping shell 401 rotates clockwise and the inner clamping shell 406 rotates counterclockwise, and vice versa). At this time, the blade 3 located on the adjusting ring 404 will rotate synchronously and change angle. When the expected angle is reached, it can be locked by locking mechanism 409.

[0033] The locking mechanism 409 includes an external threaded hole 4091 and an annular plate 4092. The external threaded hole 4091 is respectively opened on the outer clamping shell 401 and the inner clamping shell 406. The annular plate 4092 is respectively installed on both sides of the adjusting ring 404. The annular plate 4092 is provided with an internal threaded hole 4093 that matches the external threaded hole 4091. When locking is required after the blade 3 reaches the expected angle, the operator needs to align the external threaded hole 4091 on the clamping shell with the internal threaded hole 4093 on the annular plate 4092. After alignment, they can be connected one by one with bolts. After the connection is completed, the positions of the outer clamping shell 401, the adjusting ring 404, and the inner clamping shell 406 are fixed to ensure that no relative movement occurs during the rotation of the fan.

[0034] A bearing 5 is installed inside the through hole 407 of the inner clamping shell 406. The inner clamping shell 406 is rotatably connected to the side wall of the rotating shaft 402 through the bearing 5. With this design, the adjustment mechanism 4 can obtain multiple support points during operation, which improves the stability of the overall structure and ensures the smooth operation of the blade 3 when adjusting the angle.

[0035] Gear 405 is a wide-face gear; by adopting the design of a wide-face gear, the meshing area between gear 405 and the first gear disk 403 and the second gear disk 408 is increased, thereby effectively improving the transmission effect and ensuring the power transmission efficiency during the blade 3 angle adjustment process.

[0036] A positioning part 6 is installed inside the adjusting ring 404. In specific implementation, the positioning part 6 can be designed as a stop ring or a limit block, and is rotatably mounted on the outer wall of the shaft of the blade 3. The function of the positioning part 6 is to restrict the movement of the blade 3 axially toward the outside of the adjusting ring 404, and to prevent the blade 3 from detaching or being thrown out due to centrifugal force during operation.

[0037] The working principle of this utility model is as follows:

[0038] In this embodiment, an adjustable-blade fan operates by having the output of motor 2 drive the blades 3 on the adjusting mechanism 4 to rotate via shaft 402. When adjusting the angle of the blades 3, the operator rotates the outer clamp 401 and inner clamp 406 in the opposite direction, causing gear 405 to rotate accordingly, thus changing the angle of the blades 3. Because gear 405 employs a wide-face gear design, the meshing area between it and the first gear disc 403 and the second gear disc 408 is large, ensuring efficient power transmission.

[0039] Once the blade 3 reaches the expected angle, the outer screw holes 4091 on the outer clamping shell 401 and the inner clamping shell 406 are aligned with the inner screw holes 4093 on the ring plate 4092, and the outer clamping shell 401, the adjusting ring 404 and the inner clamping shell 406 are fixed by bolts to prevent relative movement between them, thereby ensuring that the blade 3 remains stable during the operation of the fan and does not deviate in angle.

[0040] Furthermore, the inner housing 406 is connected to the rotating shaft 402 via the bearing 5 on the through hole 407, making the rotation process smoother and improving the stability of the structure. The positioning part 6, in the form of a stop ring or a limit block, prevents the fan blades 3 from moving outward along the axial direction, avoiding the blades 3 being thrown out due to centrifugal force, thus ensuring safe and efficient operation.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fan with adjustable blades, comprising a housing (1), a motor (2), and blades (3), characterized in that: The motor (2) output end is provided with an adjustment mechanism (4), and the interior of the adjustment mechanism (4) is connected to the end of the blade (3); The adjustment mechanism (4) includes: An outer clamping shell (401) is provided with a rotating shaft (402) at the center of the outer clamping shell (401). The rotating shaft (402) is connected to the output end of the motor (2). A first gear disc (403) is provided around the rotating shaft (402). Adjusting ring (404), the adjusting ring (404) is rotatably disposed on the side of the outer clamping shell (401), the ring wall of the adjusting ring (404) is rotatably connected to the blade (3), and a gear (405) is provided at the end of the blade (3), the gear (405) meshes with the first gear plate (403); An inner clamping shell (406) is rotatably disposed on the other side of the adjusting ring (404). The inner clamping shell (406) has a through hole (407) at its center to facilitate the passage of the rotating shaft (402). A second gear disc (408) is provided around the through hole (407). The second gear disc (408) meshes with the gear (405). A locking mechanism (409) is provided on the outer clamping shell (401), the adjusting ring (404) and the inner clamping shell (406) respectively. The locking mechanism (409) is used to regulate the relative movement between the outer clamping shell (401), the adjusting ring (404) and the inner clamping shell (406). The locking mechanism (409) includes: External threaded hole (4091), the external threaded hole (4091) is respectively opened on the outer clamping shell (401) and the inner clamping shell (406); Ring plate (4092), the ring plate (4092) is respectively disposed on both sides of the adjusting ring (404), and the ring plate (4092) is provided with an internal thread hole (4093) that is adapted to the external thread hole (4091).

2. The blade-adjustable fan according to claim 1, characterized in that: The inner clamping shell (406) has a bearing (5) inside the through hole (407), and the inner clamping shell (406) is rotatably connected to the side wall of the rotating shaft (402) through the bearing (5).

3. The blade-adjustable fan according to claim 1, characterized in that: The gear (405) is a wide-face gear.

4. The blade-adjustable fan according to claim 1, characterized in that: The inner side of the adjusting ring (404) is provided with a positioning part (6), which is used to restrict the blade (3) from moving to the outside of the adjusting ring (404).

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