Fan blade inclination angle high-precision dynamic adjusting device

Abstract

The utility model relates to a fan with adjustable fan blade inclination angles. A fan blade inclination angle high-precision dynamic adjusting device of a fan comprises a servo motor fixedly installed in a cabin below a driving motor, the output of the servo motor is a lead screw, and the lead screw is sleeved with a lead screw nut; the middle of the movable sliding ring is provided with a hole and protrudes upwards to form a step, kidney-shaped grooves are formed in the two sides of the step, a connecting strip extends outwards in the radial direction of the movable sliding ring, and the end of the connecting strip is bent downwards; outward extension rods are arranged on the two sides of the lead screw nut and located in a kidney-shaped groove of the movable sliding ring, and the top of the kidney-shaped groove is sealed by a pressing block through a bolt; one end of the connecting rod with the knuckle bearing is pivotally connected with the downward bending part of the movable slip ring connecting strip; each fan blade is connected with the rotating chuck through a fixing shaft which penetrates through the side wall of the rotating chuck and keeps the rotating freedom degree around the axis, and the middle of the fan blade fixing shaft is fixedly connected with the other end of the connecting rod with the knuckle bearing through a connecting rod and a pin shaft. The inclination angle of the fan blade can be dynamically adjusted with high precision.

Description

Technical Field

[0001] The utility model relates to a fan, in particular to a fan with adjustable blade inclination angle. Background Art

[0002] The existing fans adjust the air volume by adjusting the speed of the drive motor. However, some environments require a larger air volume, especially industrial fans. Since the fan is large in size and has a large moment of inertia, it is impossible for the existing fans to increase the speed of the drive motor indefinitely to achieve a larger air volume. It is urgent to find a new solution. Summary of the invention

[0003] The utility model aims to solve the above defects of the prior art and provide a high-precision dynamic adjustment device for the fan blade inclination angle. The fan blade inclination angle of the utility model can be adjusted dynamically with high precision, and a larger air volume can be achieved by adjusting the speed of the driving motor.

[0004] The utility model discloses a high-precision dynamic adjustment device for the inclination angle of a fan blade, which is arranged between the output end of a driving motor and a rotating chuck, and the fan blade and the rotating chuck are connected; the adjustment device converts linear sliding into the swing of the fan blade around the fan blade axis, and comprises: a servo motor, which is fixedly installed in a cabin under the driving motor, and the output of the servo motor is a screw rod, and the screw rod is sleeved with a screw rod nut;

[0005] The movable slip ring has a hole in the middle and protrudes upward to form a step, waist-shaped grooves are opened on both sides of the step, and a connecting strip extends outward along the radial direction of the movable slip ring, and the end of the connecting strip is bent downward;

[0006] Outward extension rods are provided on both sides of the screw nut, and the extension rods are located in the waist-shaped grooves on both sides of the step in the middle of the moving slip ring, and the top of the waist-shaped groove is covered by a pressure block through a bolt to cover the waist-shaped groove opening; the bolt passes through the pressure block and supports the extension rods on both sides of the screw nut;

[0007] A connecting rod with a joint bearing, one end of which is pivotally connected to a downwardly bent portion of a movable slip ring connecting strip;

[0008] The fan blade fixing shaft, each fan blade is connected to the rotating chuck by a fixed shaft that penetrates the side wall of the rotating chuck and maintains the freedom of rotation around the axis, a connecting rod is fixed in the middle of the fan blade fixing shaft, and the other end of the connecting rod and the other end of the connecting rod with a joint bearing are fixedly connected by a pin shaft.

[0009] In the device for high-precision dynamic adjustment of fan blade inclination angle, the drive motor is an outer rotor motor.

[0010] The high-precision dynamic adjustment device for the inclination angle of a fan blade, wherein the cabin is a transfer flange sleeve.

[0011] In the device for high-precision dynamic adjustment of fan blade inclination angle, the servo motor and its output shaft are located on the fan rotation center axis.

[0012] In the device for high-precision dynamic adjustment of the inclination angle of a fan blade, there are three bolts for fixing the pressure block at the top of the waist-shaped groove, and the middle one passes through the pressure block and supports the extension rods on both sides of the lead screw nut.

[0013] The utility model can not only change the wind speed and air volume by changing the rotation speed of the driving motor, but also dynamically and synchronously change the inclination angle of all fan blades to change the wind speed and air volume. The inclination angle of the fan blades can be changed with high precision through the servo motor and the screw transmission mechanism to change the generated wind speed and air volume. Combined with adjusting the fan rotation speed, the range of wind speed and air volume generated by the fan can be further widened to meet user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] Figure 1 A schematic diagram of a fan used in the present utility model;

[0016] Figure 2 It is a structural schematic diagram of the utility model;

[0017] Figure 3 yes Figure 2 The structural diagram after removing the adapter flange sleeve;

[0018] Figure 4 yes Figure 2 The three-dimensional image after removing the adapter flange sleeve;

[0019] Figure 5 It is a structural diagram of the servo motor, the lead screw and the nut. DETAILED DESCRIPTION

[0020] See also Figure 1-Figure 5 The utility model provides a high-precision dynamic adjustment device for the fan blade inclination angle, which is arranged between the output end of the driving motor 1 and the rotating chuck 2, and the fan blade 3 is connected to the rotating chuck 2; and includes:

[0021] A servo motor 4 is fixedly mounted in a compartment 5 under the drive motor, and its output is a screw rod 6, which is sleeved with a screw nut 7 (see Figure 5 );

[0022] The movable slip ring 8 has a hole in the middle and protrudes upward to form a step, waist-shaped grooves are opened on both sides of the step, and a connecting strip extends outward along the radial direction of the movable slip ring, and the end of the connecting strip is bent downward;

[0023] Outward extension rods 71 ​​are provided on both sides of the screw nut, and the extension rods are located in the waist-shaped grooves on both sides of the middle step of the moving slip ring, and the top of the waist-shaped groove is covered by the pressing block 9 through the bolt 91 to cover the waist-shaped groove opening;

[0024] A connecting rod 10 with a joint bearing, one end of which is pivotally connected to a downwardly bent portion of a movable slip ring connecting strip;

[0025] The blade fixing shaft 11, each blade 3 is connected to the rotating chuck 2 by the fixing shaft which penetrates the side wall of the rotating chuck and maintains the freedom of rotation around the axis, a connecting rod 12 is fixed in the middle of the blade fixing shaft, and the other end of the connecting rod and the other end of the connecting rod with the articulated bearing are fixedly connected by a pin shaft 13.

[0026] In the device for high-precision dynamic adjustment of fan blade inclination angle, the driving motor is an outer rotor motor. In the device for high-precision dynamic adjustment of fan blade inclination angle, the chamber is an adapter flange sleeve. The servo motor and its output shaft are located in the adapter flange sleeve and on the central axis of rotation of the fan.

Claims

1. A high-precision dynamic adjustment device for fan blade inclination angle, characterized in that: It is arranged between the output end of the driving motor and the rotating chuck, and the fan blades are connected to the rotating chuck; the adjustment device converts the linear sliding into the swinging of the fan blades around the fan blade axis, and comprises: a servo motor, which is fixedly installed in the cabin under the driving motor, and its output is a screw rod, and the screw rod is sleeved with a screw rod nut; The movable slip ring has a hole in the middle and protrudes upward to form a step, waist-shaped grooves are opened on both sides of the step, and a connecting strip extends outward along the radial direction of the movable slip ring, and the end of the connecting strip is bent downward; Outward extension rods are provided on both sides of the screw nut, and the extension rods are located in the waist-shaped grooves on both sides of the step in the middle of the moving slip ring, and the top of the waist-shaped groove is covered by a pressure block through a bolt to cover the waist-shaped groove opening; the bolt passes through the pressure block and supports the extension rods on both sides of the screw nut; A connecting rod with a joint bearing, one end of which is pivotally connected to a downwardly bent portion of a movable slip ring connecting strip; The fan blade fixing shaft, each fan blade is connected to the rotating chuck by a fixed shaft that penetrates the side wall of the rotating chuck and maintains the freedom of rotation around the axis, a connecting rod is fixed in the middle of the fan blade fixing shaft, and the other end of the connecting rod and the other end of the connecting rod with a joint bearing are fixedly connected by a pin shaft.

2. A high-precision dynamic adjustment device for blade inclination according to claim 1, characterized in that: The driving motor is an outer rotor motor.

3. The high-precision dynamic adjustment device for blade inclination angle according to claim 1, characterized in that: The cabin is a transition flange sleeve.

4. The high-precision dynamic adjustment device for blade inclination angle according to claim 1, characterized in that: The servo motor and its output shaft are located on the fan rotation center axis.

5. The high-precision dynamic adjustment device for blade inclination angle according to claim 1 is characterized in that: There are three bolts for fixing the pressing block at the top of the waist-shaped groove, and the middle one passes through the pressing block and supports the extension rods on both sides of the lead screw nut.

Images