Efficient and convenient bath heater wind wheel fixing device

Abstract

The utility model relates to the technical field of bath heater devices, and discloses an efficient and convenient bath heater wind wheel fixing device which is arranged in a bath heater, the bath heater comprises a wind wheel and a rotating motor, the rotating motor is connected with the wind wheel through a motor shaft, an annular groove is formed in the end of the motor shaft, and the rotating motor is arranged in the annular groove. An annular groove is formed in the wind wheel, a cotter pin is arranged in the annular groove, the cotter pin is clamped into the annular groove, and when the wind wheel is connected with the rotating motor, the movement of the wind wheel in the axial direction is limited by the cotter pin; the wind wheel locking nut has the advantage of effectively preventing the wind wheel from being pressed and deformed, and solves the problems that in the prior art, after the nut is locked, the wind wheel is prone to being pressed and deformed in the axial direction, and vibration and noise are generated.

Description

Technical Field

[0001] This utility model relates to the field of bathroom heater technology, specifically a high-efficiency and convenient bathroom heater fan wheel fixing device. Background Technology

[0002] Currently, the impeller and motor of a bathroom heater typically use a threaded nut locking structure to secure them. This involves cutting external threads on the motor shaft end, and tightening the nut during assembly to secure the impeller. This structure is sufficient for basic needs in unidirectional rotation scenarios and offers advantages such as simplicity and low cost. For bathroom heater motors requiring bidirectional rotation, such as those switching between blowing and ventilation functions, the nut locking method can utilize double nuts or thread-locking adhesive for added stability. This can prevent loosening to some extent and ensure the stability of the impeller's operation.

[0003] However, the aforementioned threaded nut tightening method has significant shortcomings: First, the axial pressure applied by the nut can easily cause plastic deformation of the wind turbine blades or hub, leading to vibration and noise during operation, affecting product lifespan and user experience; second, the nut requires high anti-loosening properties under bidirectional rotation conditions, necessitating additional anti-loosening structures such as washers and adhesives, which complicates the process and increases costs; third, the thread machining accuracy and nut tightening force require high technical skills from assembly personnel, resulting in low production efficiency. This utility model aims to solve these technical pain points. Summary of the Invention

[0004] (I) Technical problem to be solved: In view of the shortcomings of the existing technology, this utility model provides an efficient and convenient bathroom heater fan wheel fixing device, which has the advantage of effectively preventing the fan wheel from being deformed by pressure. It solves the problem that the fan wheel is easily deformed by axial pressure after the nut is tightened in the existing technology, which in turn causes vibration and noise.

[0005] (II) Technical Solution: To achieve the above-mentioned purpose of effectively preventing the impeller from deforming under pressure, this utility model provides the following technical solution: A high-efficiency and convenient bathroom heater impeller fixing device is installed inside the bathroom heater. The bathroom heater includes an impeller and a rotary motor. The rotary motor and the impeller are connected by a motor shaft. An annular groove is provided at the end of the motor shaft. A cotter pin is provided inside the annular groove. The cotter pin is inserted into the annular groove. When the impeller is connected to the rotary motor, the movement of the impeller along the axial direction is limited by the cotter pin.

[0006] Preferably, the end of the motor shaft is D-shaped to form a fixed end, that is, the fixed end includes a plane parallel to its own axis to form an anti-rotation surface; the annular groove is distributed along the outer surface shape of the motor shaft.

[0007] Preferably, the annular surface of the fixed end is chamfered at the connection between it and the anti-rotation surface, and the annular groove is formed in the annular surface area of ​​the fixed end.

[0008] Preferably, the cotter pin is a B-shaped elastic cotter pin; the lower half of the cotter pin is adapted to the fixed end and the annular groove.

[0009] Preferably, both ends of the cotter pin extend beyond the outer periphery of the motor shaft.

[0010] Preferably, the cotter pin has an opening groove at its end along the axial direction, and the opening groove is V-shaped.

[0011] Preferably, a limiting cover is provided between the impeller and the cotter pin, and a hole of the same size as the fixed end is opened at the center of the limiting cover. The thickness of the limiting cover is the same as the distance from the lower edge of the annular groove to the upper surface of the impeller.

[0012] Preferably, the limiting cover is circular and has at least four hollowed-out spaces inside, with the inner walls between the hollowed-out spaces forming a reinforcing rib structure, and the reinforcing rib structure being radial.

[0013] Preferably, the portion of the motor shaft other than the fixed end is cylindrical, and the diameter of the mounting hole at the center of the impeller is the same as the diameter of the motor shaft.

[0014] (III) Beneficial Effects: Compared with existing technologies, this utility model provides a highly efficient and convenient bathroom heater fan wheel fixing device, which has the following beneficial effects: 1. This highly efficient and convenient bathroom heater fan wheel fixing device, through the innovative structure of setting an annular groove at the end of the motor shaft and using a B-shaped elastic cotter pin for radial clamping, has significant advantages over the traditional threaded nut locking method: First, it completely eliminates the axial pressure generated by nut locking, fundamentally avoiding the problem of fan wheel deformation under pressure; second, the elastic clamping characteristics of the B-shaped elastic cotter pin can ensure the reliability of anti-loosening under bidirectional rotation conditions, without the need for additional anti-loosening structures; third, this structure simplifies the assembly process, requiring only the cotter pin to be inserted into the groove to complete the fixing, greatly improving production efficiency; in addition, by avoiding the risk of fan wheel deformation and loosening, it effectively reduces vibration and noise during equipment operation and extends product service life. From an economic perspective, this solution eliminates the thread processing process and uses standard B-shaped elastic cotter pins, which not only reduces production costs but also reduces the defect rate caused by improper assembly, achieving a dual improvement in product quality and economic benefits.

[0015] 2. This efficient and convenient bathroom heater fan wheel fixing device features a D-shaped anti-rotation surface and an annular groove at the end of the motor shaft, which, in conjunction with a B-shaped elastic cotter pin with a right-angled edge, achieves reliable anti-rotation fixing. When the cotter pin is engaged in the annular groove, its right-angled edge fits tightly against the anti-rotation surface of the D-shaped shaft, forming a mechanical limit and effectively preventing the cotter pin from rotating with the fan wheel. This structural design ensures the reliability of axial fixing and significantly improves the overall structural stability through surface contact anti-rotation, avoiding the loosening problems that may occur with traditional threaded connections. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the complete structure of this utility model;

[0017] Figure 2 for Figure 1 Enlarged schematic diagram of the cotter pin section;

[0018] Figure 3 This is a schematic diagram of the structure of this utility model without the wind turbine installed;

[0019] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at the fixed end;

[0020] Figure 5 This is a top view of the structure of this utility model.

[0021] In the diagram: 1. Wind turbine; 2. Rotary motor; 3. Motor shaft; 31. Annular groove; 32. Fixed end; 33. Anti-rotation surface; 4. Cotter pin; 41. Opening groove; 5. Limiting cover; 51. Hollowed-out space; 52. Reinforcing rib structure. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figures 1-5A highly efficient and convenient bathroom heater fan wheel fixing device is installed inside the bathroom heater. The bathroom heater includes a fan wheel 1 and a rotary motor 2. The rotary motor 2 is connected to the fan wheel 1 via a motor shaft 3. An annular groove is formed at the end of the motor shaft 3. The end of the motor shaft 3 is D-shaped, forming a fixed end 32. The fixed end 32 includes a plane parallel to its own axis, forming an anti-rotation surface 33. The annular groove is distributed along the outer surface of the motor shaft 3. A chamfer is provided at the connection between the annular surface of the fixed end 32 and the anti-rotation surface 33. The annular groove is formed on the fixed end 32. The annular surface area of ​​end 32; a cotter pin 4 is provided inside the annular groove. The cotter pin 4 is inserted into the annular groove. When the impeller 1 is connected to the rotary motor 2, the movement of the impeller 1 along the axial direction is limited by the cotter pin 4. This utility model completely eliminates the axial pressure generated by the nut locking, fundamentally avoiding the problem of the impeller 1 being deformed by pressure. At the same time, a D-shaped anti-rotation surface 33 and an annular groove are provided at the end of the motor shaft 3. With the B-shaped elastic cotter pin 4 with right angle sides, reliable anti-rotation fixing can be achieved, ensuring stable and reliable product quality.

[0024] Please see Figures 1-2 The cotter pin 4 is a B-shaped elastic cotter pin 4. The elastic locking characteristic of the cotter pin 4 ensures the reliability of anti-loosening under bidirectional rotation conditions. It achieves self-locking anti-loosening under bidirectional rotation conditions through radial elastic force, without the need for auxiliary anti-loosening devices. The lower half of the cotter pin 4 is adapted to the fixed end 32 and the annular groove to ensure positioning accuracy. The two ends of the cotter pin 4 extend out of the outer periphery of the motor shaft 3 to form axial limiting stops, effectively suppressing the radial movement of the impeller 1. The end of the cotter pin 4 along the axial direction is provided with an opening groove 41. The opening groove 41 is V-shaped, which facilitates elastic deformation during installation and ensures structural strength under working conditions. In the existing technology, the bathroom heater motor needs to frequently rotate forward and backward to blow air and change air. Ordinary fixing methods may loosen or fall off under vibration and bidirectional torque. The B-shaped design makes the cotter pin 4 lose the freedom of rotation along the annular groove, making the structure more stable.

[0025] Please see Figure 1 and Figure 5A limiting cover 5 is provided between the impeller 1 and the cotter pin 4. The center of the limiting cover 5 has a hole with the same size as the fixed end 32. The thickness of the limiting cover 5 is the same as the distance from the lower edge of the annular groove to the upper surface of the impeller 1, which can effectively fill the assembly gap and ensure that the device is compatible with different types of bathroom heaters. The limiting cover 5 is circular and has at least four hollowed-out spaces 51 inside to dissipate the heat generated when the impeller 1 rotates. The inner wall between the hollowed-out spaces 51 forms a reinforcing rib structure 52. The reinforcing rib structure 52 is radial, which reduces the structural weight and enhances the structural stability. The part of the motor shaft 3 other than the fixed end 32 is a cylindrical structure, which matches the mounting hole of the impeller 1 with the same shaft diameter to ensure compatibility with mainstream impeller 1 equipment on the market. In actual use, a retaining spring can also be provided between the impeller 1 and the limiting cover 5. The retaining spring can absorb vibration through elastic damping, making the overall structure more stable.

[0026] In summary, this efficient and convenient bathroom heater fan wheel fixing device, through its innovative structure of setting an annular groove at the end of the motor shaft 3 and using a B-shaped elastic cotter pin 4 for radial locking, has significant advantages over the traditional threaded nut locking method: First, it completely eliminates the axial pressure generated by nut locking, fundamentally avoiding the problem of fan wheel 1 being deformed under pressure; second, the elastic locking characteristic of the B-shaped elastic cotter pin 4 ensures reliable anti-loosening under bidirectional rotation conditions, eliminating the need for additional anti-loosening structures; third, this structure simplifies the assembly process, requiring only the cotter pin 4 to be inserted into the groove for fixing, significantly improving production efficiency; furthermore, by avoiding the risk of fan wheel 1 deformation and loosening, it effectively reduces vibration and noise during equipment operation, extending product lifespan. From an economic perspective, this solution eliminates the thread processing step and uses standard B-shaped elastic cotter pins 4, not only reducing production costs but also decreasing the defect rate caused by improper assembly, achieving a dual improvement in product quality and economic benefits.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency and convenient bathroom heater fan wheel fixing device, installed inside the bathroom heater, the bathroom heater including a fan wheel (1) and a rotary motor (2), the rotary motor (2) being connected to the fan wheel (1) via a motor shaft (3), characterized in that: The end of the motor shaft (3) is provided with an annular groove, and a cotter pin (4) is provided inside the annular groove. The cotter pin (4) is inserted into the annular groove. When the impeller (1) is connected to the rotary motor (2), the movement of the impeller (1) along the axial direction is limited by the cotter pin (4).

2. The efficient and convenient bathroom heater fan wheel fixing device according to claim 1, characterized in that: The end of the motor shaft (3) is D-shaped, forming a fixed end (32), that is, the fixed end (32) includes a plane parallel to its own axis, forming an anti-rotation surface (33); the annular groove is distributed along the outer surface shape of the motor shaft (3).

3. The efficient and convenient bathroom heater fan wheel fixing device according to claim 2, characterized in that: The annular surface of the fixed end (32) is chamfered at the connection between it and the anti-rotation surface (33), and the annular groove is formed in the annular surface area of ​​the fixed end (32).

4. A high-efficiency and convenient bathroom heater fan wheel fixing device according to any one of claims 2-3, characterized in that: The cotter pin (4) is a B-shaped elastic cotter pin (4); the lower half of the cotter pin (4) is adapted to the fixed end (32) and the annular groove.

5. The efficient and convenient bathroom heater fan wheel fixing device according to claim 1, characterized in that: The two ends of the cotter pin (4) extend out of the outer periphery of the motor shaft (3).

6. The efficient and convenient bathroom heater fan wheel fixing device according to claim 1, characterized in that: The cotter pin (4) has an opening groove (41) at its end along the axial direction, and the opening groove (41) is V-shaped.

7. The efficient and convenient bathroom heater fan wheel fixing device according to claim 2, characterized in that: A limiting cover (5) is provided between the wind turbine (1) and the cotter pin (4). The center of the limiting cover (5) has a hole with the same size as the fixed end (32). The thickness of the limiting cover (5) is the same as the distance from the lower edge of the annular groove to the upper surface of the wind turbine (1).

8. The efficient and convenient bathroom heater fan wheel fixing device according to claim 7, characterized in that: The limiting cover (5) is circular and has at least four hollow spaces (51) inside. The inner walls between the hollow spaces (51) form a reinforcing rib structure (52), which is radial.

9. The efficient and convenient bathroom heater fan wheel fixing device according to claim 2, characterized in that: The part of the motor shaft (3) other than the fixed end (32) is cylindrical, and the diameter of the mounting hole at the center of the wind turbine (1) is the same as the diameter of the motor shaft (3).

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