A hub for an axial flow fan

Abstract

This utility model discloses a hub for an axial flow fan, including a bushing and a disc. The disc has mounting grooves distributed around its circumference for mounting fan blades. A through hole runs through the center of the disc. The disc is equipped with a positioning component that communicates with the through hole. A connecting piece is correspondingly provided on the outer side of the bushing. After the bushing is installed in the through hole, the positioning component and the connecting piece are fixedly connected. This utility model achieves a modular connection between the bushing and the disc through the coordinated design of the through hole and the positioning component. This ensures axial positioning accuracy and torque transmission reliability, and allows for quick bushing replacement to adapt to different operating conditions. It is suitable for axial flow fans that require frequent shaft system replacement or long-term high-load operation, improving compatibility and reducing maintenance costs.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine equipment technology, specifically relating to a hub for an axial flow fan. Background Technology

[0002] Axial flow fans have a wide range of applications. They are a type of fan where the airflow direction is the same as the axis of the fan blades, such as electric fans and air conditioner outdoor unit fans. They are called "axial flow" because the gas flows parallel to the fan axis.

[0003] Axial flow fans are widely used ventilation equipment in the industrial field, and their hub structure directly affects the assembly accuracy and operational stability of the fan blades. Traditional hubs mostly adopt an integrated design of bushing and disc, which is structurally stable, but when the bushing wears out or needs to be adapted to different shaft systems, the entire hub must be replaced, resulting in high maintenance costs and wasted resources. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and provide a hub for axial flow fans. Through the coordinated design of through holes and positioning components, the hub achieves modular connection between the bushing and the wheel disc, which not only ensures axial positioning accuracy and torque transmission reliability, but also allows for quick replacement of the bushing to adapt to different working conditions. It is suitable for axial flow fans that require frequent shaft system replacement or long-term high-load operation, thus improving compatibility and reducing maintenance costs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A hub for an axial flow fan includes a bushing and a disc. The disc has mounting grooves distributed around its circumference for mounting fan blades. A through hole runs through the center of the disc. The disc is equipped with a positioning component that communicates with the through hole. A connecting piece is correspondingly provided on the outer side of the bushing. After the bushing is installed in the through hole, the positioning component and the connecting piece are fixedly connected. This invention achieves a modular connection between the bushing and the disc through the coordinated design of the through hole and the positioning component. This ensures axial positioning accuracy and torque transmission reliability, while also allowing for quick bushing replacement to adapt to different operating conditions. It is suitable for axial flow fans that require frequent shaft system replacement or long-term high-load operation, improving compatibility and reducing maintenance costs.

[0007] Furthermore, the connecting component includes a threaded connection part and a positioning ring. Both the threaded connection part and the positioning ring are corresponding to the through hole. The threaded connection part is fixedly connected to the bottom of the outer side of the bushing. The bottom of the through hole is provided with an internal thread, which matches the threaded connection part. The threaded connection part is threadedly connected inside the through hole, and the positioning ring is fixedly connected to the top of the outer side of the bushing. The matching of the threaded connection part with the internal thread allows the bushing to be fixed in the through hole by a threaded connection. The positioning component and the positioning ring then provide a positioning connection, ensuring both axial positioning accuracy and torque transmission reliability, while also allowing for quick replacement of the bushing to adapt to different working conditions.

[0008] Furthermore, the positioning assembly includes a positioning protrusion, a connecting rod, and a spring. The wheel disc has a mounting hole corresponding to the connecting piece, which communicates with the through hole. The positioning protrusion and the connecting rod are movably connected in the mounting hole. One end of the connecting rod near the through hole is fixedly connected to the positioning protrusion, and the other end of the connecting rod passes through the outer wall of the wheel disc. A positioning ring has a positioning pin hole corresponding to the positioning protrusion. By pulling the connecting rod, the bushing is installed into the through hole; by releasing the connecting rod, the positioning protrusion is inserted into the positioning pin hole. The spring-driven linkage design between the positioning protrusion and the connecting rod enables rapid positioning and locking of the bushing. When the connecting rod is released, the positioning protrusion automatically engages with the positioning pin hole, ensuring the coaxiality of the bushing and the wheel disc, and increasing the stability of the connection between the bushing and the wheel disc.

[0009] Furthermore, a bracket is provided on the outer wall of the wheel corresponding to the connecting rod. The other end of the connecting rod passes through the bracket and has a threaded end. Two locking nuts are screwed into the threaded end, and the two locking nuts are tightened on the inner and outer sides of the bracket. The double-nut locking structure forms a bidirectional preload through the threaded engagement on the inner and outer sides of the bracket, effectively preventing the connecting rod from loosening when the fan is running at high speed. By loosening the locking nuts on both sides, the connecting rod can be driven to adjust the position of the positioning protrusion since it passes through the bracket.

[0010] Furthermore, the bottom of the wheel is provided with a threaded stepped hole that passes through the mounting groove. A clamping assembly is provided on the wheel corresponding to the mounting groove to clamp the connecting shaft of the fan blade. After the connecting shaft of the fan blade is installed into the mounting groove, a bolt is screwed into the threaded stepped hole at the bottom of the wheel. The bolt passes through the connecting shaft and is tightened in the mounting groove, ensuring that the bolt acts perpendicularly on the connecting shaft and guaranteeing the stability of the connection between the connecting shaft and the wheel. The clamping assembly is then installed on the mounting groove to clamp and fix the connecting shaft of the fan blade onto the wheel.

[0011] Furthermore, the clamping assembly employs an arc-shaped clamping frame with an arc-shaped groove at its bottom. This groove is matched to the connecting shaft of the fan blade. Both ends of the arc-shaped clamping frame extend to form fixing parts, which are securely connected to the wheel by fasteners. The arc-shaped groove perfectly fits the curved surface of the fan blade's connecting shaft, increasing the contact area while dispersing stress concentration. The extended design of the fixing parts makes the clamping force distribution more reasonable, reducing the risk of fan blade deformation.

[0012] Furthermore, the wheel has several through holes distributed around its circumference. The fixing part has corresponding connecting holes for each through hole. The fixing component includes a limiting sleeve and a connecting bolt. The limiting sleeve is inserted into the through hole. The bottom of the limiting sleeve has a limiting part with a diameter larger than the diameter of the through hole. The limiting part abuts against the bottom of the turntable. The limiting sleeve has two internal threads that match the connecting bolt. The bottom of the connecting bolt is threadedly connected to the limiting sleeve, and the top of the connecting bolt is tightened onto the fixing part. The stepped structure of the limiting sleeve achieves self-positioning through the bottom limiting part, and the threaded locking of the connecting bolt further secures the fixing part to the wheel.

[0013] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0014] This utility model achieves modular connection between the bushing and the wheel disc through the coordinated design of through holes and positioning components. It ensures axial positioning accuracy and torque transmission reliability, and can adapt to different working conditions by quickly replacing the bushing. It is suitable for axial flow fans that require frequent shaft system replacement or long-term high-load operation, thus improving compatibility and reducing maintenance costs.

[0015] In this invention, the connecting component includes a threaded connection part and a positioning ring. Both the threaded connection part and the positioning ring are corresponding to the through hole. The threaded connection part is fixedly connected to the bottom of the outer side of the bushing. The bottom of the through hole is provided with an internal thread, which matches the threaded connection part. The threaded connection part is threadedly connected inside the through hole, and the positioning ring is fixedly connected to the top of the outer side of the bushing. The matching of the threaded connection part with the internal thread allows the bushing to be fixed in the through hole by a threaded connection. The positioning component and the positioning ring then provide a positioning connection, ensuring both axial positioning accuracy and torque transmission reliability, while also allowing for quick replacement of the bushing to adapt to different working conditions.

[0016] The positioning component of this invention includes a positioning protrusion, a connecting rod, and a spring. The wheel has a mounting hole corresponding to the connecting part, which communicates with a through hole. The positioning protrusion and the connecting rod are movably connected in the mounting hole. One end of the connecting rod near the through hole is fixedly connected to the positioning protrusion, and the other end of the connecting rod passes through the outer wall of the wheel. A positioning ring has a positioning pin hole corresponding to the positioning protrusion. By pulling the connecting rod, the bushing is installed into the through hole; by releasing the connecting rod, the positioning protrusion is inserted into the positioning pin hole. The spring-driven linkage between the positioning protrusion and the connecting rod enables rapid positioning and locking of the bushing. When the connecting rod is released, the positioning protrusion automatically engages with the positioning pin hole, ensuring the coaxiality of the bushing and the wheel, and increasing the stability of the connection between the bushing and the wheel. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a hub for an axial flow fan according to the present invention;

[0019] Figure 2 This is a schematic diagram of the connection between the wheel and the clamping assembly in this utility model;

[0020] Figure 3 This is a schematic diagram of the connection between the bushing and the connector in this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the bottom of the wheel in this utility model;

[0022] Figure 5 This is a schematic diagram of the positioning component in this utility model;

[0023] Figure 6 This is an exploded view of the clamping assembly in this utility model;

[0024] Figure 7 This is a schematic diagram of the connection between the wheel hub and the fan blades in this utility model.

[0025] In the diagram, 1-sleeve; 2-wheel; 3-mounting groove; 4-through hole; 5-positioning component; 6-connector; 7-threaded connection; 8-positioning ring; 9-internal thread one; 10-positioning protrusion; 11-connecting rod; 12-spring; 13-mounting hole; 14-positioning pin hole; 15-bracket; 16-threaded end; 17-locking nut; 18-threaded stepped hole; 19-arc-shaped clamping bracket; 20-arc-shaped groove; 21-fixing part; 22-fixing component; 23-through hole; 24-connecting hole; 25-limiting sleeve; 26-connecting bolt; 27-limiting part; 28-internal thread two; 29-fan blade; 30-connecting shaft. Detailed Implementation

[0026] like Figures 1 to 7 As shown, this utility model discloses a hub for an axial flow fan, including a bushing 1 and a disc 2. The disc 2 has mounting grooves 3 distributed around its circumference for mounting fan blades 29. A through hole 4 passes through the center of the disc 2. The disc 2 is provided with a positioning component 5, which is connected to the through hole 4. A connecting piece 6 is provided on the outer side of the bushing 1. After the bushing 1 is installed in the through hole 4, the positioning component 5 and the connecting piece 6 are fixedly connected.

[0027] The connecting component 6 includes a threaded connection part 7 and a positioning ring 8. Both the threaded connection part 7 and the positioning ring 8 are provided corresponding to the through hole 4. The threaded connection part 7 is fixedly connected to the bottom of the outer side of the bushing 1. The bottom of the through hole 4 is provided with an internal thread 9, which matches the threaded connection part 7. The threaded connection part 7 is threadedly connected inside the through hole 4, and the positioning ring 8 is fixedly connected to the top of the outer side of the bushing 1. The threaded connection part 7 is matched with the internal thread 9, which realizes that the bushing 1 is fixed in the through hole 4 by a threaded connection. Then, through the positioning component 5 and the positioning ring 8, it ensures both axial positioning accuracy and torque transmission reliability, and allows the bushing 1 to be quickly replaced to adapt to different working conditions.

[0028] The positioning component 5 includes a positioning protrusion 10, a connecting rod 11, and a spring 12. The wheel 2 has a mounting hole 13 corresponding to the connecting piece 6, which communicates with the through hole 4. The positioning protrusion 10 and the connecting rod 11 are movably connected in the mounting hole 13. One end of the connecting rod 11 near the through hole 4 is fixedly connected to the positioning protrusion 10, and the other end of the connecting rod 11 passes through the outer wall of the wheel 2. The positioning ring 8 has a positioning pin hole 14 corresponding to the positioning protrusion 10. By pulling the connecting rod 11, the bushing 1 is installed into the through hole 4. Releasing the connecting rod 11 allows the positioning protrusion 10 to insert into the positioning pin hole 14. The linkage design between the positioning protrusion 10 driven by the spring 12 and the connecting rod 11 enables rapid positioning and locking of the bushing 1. When the connecting rod 11 is released, the positioning protrusion 10 automatically engages with the positioning pin hole 14, ensuring the coaxiality of the bushing 1 and the wheel 2, and increasing the stability of the connection between the bushing 1 and the wheel 2.

[0029] A bracket 15 is provided on the outer wall of the wheel 2 corresponding to the connecting rod 11. The other end of the connecting rod 11 passes through the bracket 15 and has a threaded end 16. Two locking nuts 17 are screwed into the threaded end 16, and the two locking nuts 17 are tightened on the inner and outer sides of the bracket 15. The double-nut locking structure forms a bidirectional preload through the threaded engagement on the inner and outer sides of the bracket 15, effectively preventing the connecting rod 11 from loosening when the fan is running at high speed. By loosening the locking nuts 17 on both sides, the connecting rod 11 can be driven to adjust the position of the positioning protrusion 10 since it passes through the bracket 15.

[0030] The bottom of the wheel 2 is provided with a threaded stepped hole 18, which passes through the mounting groove 3. The wheel 2 is provided with a clamping assembly corresponding to the mounting groove 3, which clamps the connecting shaft 30 of the fan blade 29. After the connecting shaft 30 of the fan blade 29 is installed into the mounting groove 3, a bolt is screwed into the threaded stepped hole 18 at the bottom of the wheel 2. The bolt passes through the connecting shaft 30 of the fan blade 29 and is tightened in the mounting groove 3, so that the bolt acts perpendicularly on the connecting shaft 30 of the fan blade 29, ensuring the stability of the connection between the connecting shaft 30 of the fan blade 29 and the wheel 2. Then, the clamping assembly is set on the mounting groove 3 to clamp and fix the connecting shaft 30 of the fan blade 29 onto the wheel 2.

[0031] The clamping assembly uses an arc-shaped clamping frame 19, with an arc-shaped groove 20 at its bottom. The arc-shaped groove 20 is matched with the connecting shaft 30 of the fan blade 29. Both ends of the arc-shaped clamping frame 19 extend to form fixing parts 21, which are fixedly connected to the wheel 2 via fasteners 22. The arc-shaped groove 20 and the curved surface of the connecting shaft 30 of the fan blade 29 are completely fitted, increasing the contact area while dispersing stress concentration. The extended design of the fixing parts 21 makes the clamping force distribution more reasonable, reducing the risk of deformation of the fan blade 29.

[0032] The turntable 2 has several through holes 23 distributed around its circumference. The fixing part 21 has connecting holes 24 corresponding to the through holes 23. The fixing component 22 includes a limiting sleeve 25 and a connecting bolt 26. The limiting sleeve 25 is inserted into the through hole 23. The bottom of the limiting sleeve 25 has a limiting part 27, the diameter of which is larger than the diameter of the through hole 23. The limiting part 27 abuts against the bottom of the turntable. The limiting sleeve 25 has an internal thread 28, which matches the connecting bolt 26. The bottom of the connecting bolt 26 is threadedly connected to the limiting sleeve 25, and the top of the connecting bolt 26 is tightened onto the fixing part 21. The stepped structure of the limiting sleeve 25 achieves self-positioning through the bottom limiting part 27, and, in conjunction with the threaded locking of the connecting bolt 26, fixes the fixing part 21 onto the turntable 2.

[0033] This utility model achieves modular connection between bushing 1 and wheel 2 through the coordinated design of through hole 4 and positioning component 5. It ensures axial positioning accuracy and torque transmission reliability, and can adapt to different working conditions by quickly replacing bushing 1. It is suitable for axial flow fans that require frequent shaft system replacement or long-term high-load operation, improving compatibility and reducing maintenance costs.

[0034] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A hub for an axial flow fan, comprising a shaft sleeve and a disc, the disc having mounting slots circumferentially distributed thereon for mounting fan blades, characterized in that: The wheel has a through hole in its center. The wheel is equipped with a positioning component that is connected to the through hole. A connecting piece is provided on the outer side of the bushing. After the bushing is installed in the through hole, the positioning component and the connecting piece are fixedly connected.

2. A hub for an axial fan as claimed in claim 1, characterized in that: The connector includes a threaded connection part and a positioning ring. The threaded connection part and the positioning ring are both provided corresponding to the through hole. The threaded connection part is fixedly connected to the bottom of the outer side of the bushing. The bottom of the through hole is provided with an internal thread. The internal thread is matched with the threaded connection part. The threaded connection part is threadedly connected in the through hole. The positioning ring is fixedly connected to the top of the outer side of the bushing.

3. A hub for an axial fan as claimed in claim 2, characterized in that: The positioning assembly includes a positioning protrusion, a connecting rod, and a spring. The wheel has a mounting hole corresponding to the connecting member, and the mounting hole communicates with the through hole. The positioning protrusion and the connecting rod are movably connected in the mounting hole. One end of the connecting rod near the through hole is fixedly connected to the positioning protrusion, and the other end of the connecting rod passes through the outer wall of the wheel. The positioning ring has a positioning pin hole corresponding to the positioning protrusion. By pulling the connecting rod, the bushing is installed into the through hole. By releasing the connecting rod, the positioning protrusion is inserted into the positioning pin hole.

4. The hub for an axial flow fan according to claim 3, characterized in that: The outer wall of the wheel is provided with a bracket corresponding to the connecting rod. The other end of the connecting rod passes through the bracket and has a threaded end. Two locking nuts are screwed into the threaded end, and the two locking nuts are tightened on the inner and outer sides of the bracket.

5. A hub for an axial flow fan according to claim 1, characterized in that: The bottom of the wheel is provided with a threaded stepped hole that passes through the mounting groove. The wheel is provided with a clamping component corresponding to the mounting groove, and the clamping component clamps the connecting shaft of the fan blade.

6. A hub for an axial flow fan according to claim 1, characterized in that: The clamping assembly adopts an arc-shaped clamping frame, and the bottom of the arc-shaped clamping frame is provided with an arc-shaped slot. The arc-shaped slot is matched with the connecting shaft of the fan blade. The two ends of the arc-shaped clamping frame extend to form fixing parts, and the fixing parts are fixedly connected to the wheel by fasteners.

7. A hub for an axial flow fan according to claim 6, characterized in that: The wheel has several through holes distributed around its circumference. The fixing part has a connecting hole corresponding to the through holes. The fixing part includes a limiting sleeve and a connecting bolt. The limiting sleeve is inserted into the through hole. The bottom of the limiting sleeve has a limiting part with a diameter larger than the diameter of the through hole. The limiting part abuts against the bottom of the turntable. The limiting sleeve has an internal thread II. The internal thread II is matched with the connecting bolt. The bottom of the connecting bolt is threadedly connected to the limiting sleeve. The top of the connecting bolt is tightened onto the fixing part.

Images