Automobile air conditioner fan motor with better silence

Abstract

This utility model relates to the technical field of automotive air conditioning fan motors, and discloses an automotive air conditioning fan motor with improved quietness. It includes a cover and threaded holes. The inner wall of the cover is machined with threaded holes and is fixedly connected to a mounting cylinder. The inner wall of the rear end of the mounting cylinder is threadedly connected to a mounting bracket. A noise reduction mechanism is connected to the inner wall of the mounting cylinder. As the motor's output shaft drives the fan blades to rotate, the blades draw air from the rear end of the mounting cylinder, forming an airflow. This airflow is blown outwards along the arc of the guide plate, diffusing the airflow and reducing noise generated by direct airflow and friction with internal objects. The sound-absorbing cotton layer forms flocculent fine fibers, creating numerous tiny gaps and pores that absorb vibration noise from the mounting cylinder and guide plate, reducing airflow noise generated inside the mounting cylinder during operation.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive air conditioning fan motors, specifically an automotive air conditioning fan motor with better noise reduction. Background Technology

[0002] A permanent magnet synchronous motor consists of components such as a stator, rotor, and end covers. The stator is basically the same as that of a conventional induction motor, but it uses a laminated structure to reduce iron losses during motor operation.

[0003] For example, an automotive air conditioning fan motor with authorization announcement number "CN221177466U" solves the problem that existing automotive air conditioning fan motors have insufficient stability and poor durability due to the direct use of plastic material for the fan blades, and are prone to vibration and noise at high speeds. Considering that in the operation of existing automotive air conditioning fan motors, the airflow generated by the rotation of the motor blades is often in a straight line, and the airflow entering from the rear end of the fan blades and the airflow exiting from the front end will generate airflow noise due to the friction between the air inside the cavity and the air. Utility Model Content

[0004] The purpose of this invention is to solve the problem of airflow noise generated by the friction between the air inside the cavity and the existing automotive air conditioning fan motor, and to propose an automotive air conditioning fan motor with better noise reduction.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a car air conditioning fan motor with better noise reduction, comprising a cover and a threaded hole, wherein the inner wall of the cover is machined with a threaded hole, the inner wall of the cover is fixedly connected to a mounting cylinder, the inner wall of the rear end of the mounting cylinder is threadedly connected to a mounting bracket, and a noise reduction mechanism is connected to the inner wall of the mounting cylinder.

[0006] Preferably, the noise reduction mechanism includes a fixed cylinder, the outer wall of which is threadedly connected to the mounting cylinder, the inner wall of which is fixedly connected to the sound-absorbing cotton layer, and the inner wall of the front end of the fixed cylinder is fixedly connected to the guide plate.

[0007] Preferably, the mounting bracket is threadedly connected to the outer wall of the motor by bolts, and a shock-absorbing mechanism is connected to the inner wall of the threaded hole.

[0008] Preferably, the shock absorption mechanism includes a threaded tube, the outer wall of which is threadedly connected to a threaded hole, the end of which is fixedly connected to a rubber seat, and the inner walls of the threaded tube and the rubber seat are machined with through holes.

[0009] Preferably, the output shaft of the motor is fixedly connected to the fan blades.

[0010] Preferably, the inner wall of the mounting bracket is machined with fixing holes.

[0011] The present invention proposes a car air conditioning fan motor with better noise reduction. The beneficial effects are as follows: as the fan blades are driven to rotate by the output shaft of the motor, the fan blades draw air from the rear end of the mounting cylinder to form an airflow. The airflow is blown outward along the arc of the guide plate, which reduces the noise generated by the direct airflow and friction with internal objects. The sound-absorbing cotton layer forms flocculent fine fibers, creating many small gaps and pores, which can absorb the vibration noise generated by the mounting cylinder and the guide plate, and reduce the airflow noise generated inside the mounting cylinder during operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 Schematic diagram of the three-dimensional back structure;

[0014] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the noise reduction mechanism;

[0015] Figure 4 for Figure 1 Enlarged 3D structural diagram of the central guide vane;

[0016] Figure 5 for Figure 1 Enlarged 3D schematic diagram of the central damping mechanism;

[0017] Figure 6 for Figure 1 Enlarged schematic diagram of the mounting bracket.

[0018] In the diagram: 1. Cover, 2. Threaded hole, 3. Mounting cylinder, 4. Mounting bracket, 5. Noise reduction mechanism, 501. Fixing cylinder, 502. Sound-absorbing cotton layer, 503. Guide plate, 6. Motor, 7. Vibration damping mechanism, 701. Threaded tube, 702. Rubber seat, 703. Through hole, 8. Fan blade, 9. Fixing hole. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Example 1: Please refer to Figure 1-6 In this embodiment, a car air conditioning fan motor with better noise reduction includes a cover 1 and a threaded hole 2. The inner wall of the cover 1 is machined with the threaded hole 2. The inner wall of the cover 1 is fixedly connected to the mounting cylinder 3. The inner wall of the rear end of the mounting cylinder 3 is threadedly connected to the mounting bracket 4. The inner wall of the mounting cylinder 3 is connected to a noise reduction mechanism 5.

[0021] The noise reduction mechanism 5 includes a fixed cylinder 501, which is screwed into the mounting cylinder 3 to fix the sound-absorbing cotton layer 502 and the guide plate 503 on the fixed cylinder 501 to the mounting cylinder 3. The sound-absorbing cotton layer 502 forms flocculent fine fibers, which can absorb the vibration noise generated by the mounting cylinder 3 and the guide plate 503. The outer wall of the fixed cylinder 501 is threaded to the mounting cylinder 3, the inner wall of the fixed cylinder 501 is fixedly connected to the sound-absorbing cotton layer 502, and the inner wall at the front end of the fixed cylinder 501 is fixedly connected to the guide plate 503.

[0022] As the output shaft of motor 6 drives the fan blade 8 to rotate, the fan blade 8 draws air from the rear end of the mounting cylinder 3 to form an airflow. The airflow blows outward along the arc of the guide plate 503, causing the wind force to diffuse outward and reducing the noise generated by the direct wind blowing and friction with internal objects. This causes the sound-absorbing cotton layer 502 to form flocculent fine fibers, creating many small gaps and pores, which can absorb the vibration noise generated by the mounting cylinder 3 and the guide plate 503, reducing the airflow noise generated inside the mounting cylinder 3 during operation.

[0023] Mounting bracket 4 is threadedly connected to the outer wall of motor 6 via bolts. The inner wall of threaded hole 2 is connected to a shock-absorbing mechanism 7. The vibration of motor 6 is transmitted to threaded tube 701 and rubber seat 701 through cover 1. Rubber seat 701 buffers and absorbs the vibration. The shock-absorbing mechanism 7 includes threaded tube 701. The outer wall of threaded tube 701 is threadedly connected to threaded hole 2. The end of threaded tube 701 is fixedly connected to rubber seat 702. Through holes 703 are machined on the inner walls of threaded tube 701 and rubber seat 702. The output shaft of motor 6 is fixedly connected to fan blade 8. The model of motor 6 is determined according to the model and meets the working requirements. Fixing holes 9 are machined on the inner wall of mounting bracket 4.

[0024] Working principle:

[0025] The fixing cylinder 501 is screwed into the mounting cylinder 3, fixing the sound-absorbing cotton layer 502 and the guide plate 503 on the fixing cylinder 501 into the mounting cylinder 3. At the same time, the motor 6 can be inserted into the mounting bracket 4, and the external bolt is threaded to the outer wall of the motor 6 through the fixing hole 9. The motor 6 is fixed to the inner wall of the mounting bracket 4, and the mounting bracket 4 is screwed into the mounting cylinder 3, fixing the motor 6 containing the fan blade 8 to the mounting cylinder 3. At the same time, the threaded tube 701 on the cover 1 is screwed into the threaded hole 2 on the cover, fixing the threaded tube 701 to the cover 1. The external screw is used to pass through the threaded tube 701 and the rubber seat 702 to install it into the engine compartment.

[0026] When the external power supply of motor 6 is connected, motor 6 starts to work. The output shaft of motor 6 drives fan blade 8 to rotate. Fan blade 8 draws air from the rear end of mounting cylinder 3 to form airflow. The airflow blows outward along the arc of guide plate 503, allowing the wind force to diffuse outward and reducing the noise generated by direct wind blowing and friction with internal objects. The sound-absorbing cotton layer 502, composed of artificial inorganic fibers, is attached and fixed inside the fixed cylinder 501, forming flocculent fine fibers. These fibers are three-dimensionally interwoven and intertwined, creating many small gaps and pores that can absorb the vibration noise generated by mounting cylinder 3 and guide plate 503. At the same time, for the vibration noise generated by motor 6 during operation, the cover 1 transmits the vibration of motor 6 to threaded tube 701 and rubber seat 701. Rubber seat 701 buffers and absorbs the vibration, preventing the cover 1 and motor 6 from generating large-amplitude vibrations that produce noise.

[0027] 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 alterations 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 quieter automotive air conditioning fan motor, comprising a housing (1) and a threaded hole (2), wherein the inner wall of the housing (1) is machined with the threaded hole (2), characterized in that: The inner wall of the cover (1) is fixedly connected to the mounting cylinder (3), the inner wall of the rear end of the mounting cylinder (3) is threadedly connected to the mounting frame (4), and the inner wall of the mounting cylinder (3) is connected to a noise reduction mechanism (5).

2. The better silent automobile air conditioner fan motor as claimed in claim 1, wherein: The noise reduction mechanism (5) includes a fixed cylinder (501), the outer wall of the fixed cylinder (501) is threadedly connected to the mounting cylinder (3), the inner wall of the fixed cylinder (501) is fixedly connected to the sound-absorbing cotton layer (502), and the inner wall at the front end of the fixed cylinder (501) is fixedly connected to the guide plate (503).

3. The better silent automobile air conditioner fan motor as claimed in claim 1 wherein: The mounting bracket (4) is threaded to the outer wall of the motor (6) by bolts, and the inner wall of the threaded hole (2) is connected to a shock-absorbing mechanism (7).

4. The automotive air conditioning fan motor with improved noise reduction according to claim 3, characterized in that: The shock absorption mechanism (7) includes a threaded tube (701), the outer wall of which is threadedly connected to a threaded hole (2), the end of which is fixedly connected to a rubber seat (702), and the inner walls of the threaded tube (701) and the rubber seat (702) are machined with through holes (703).

5. The better silent automobile air conditioner fan motor as claimed in claim 3 wherein: The output shaft of the motor (6) is fixedly connected to the fan blade (8).

6. The better quietness automobile air conditioner fan motor as claimed in claim 1, wherein: Fixing holes (9) are machined on the inner wall of the mounting bracket (4).

Images