Dust collector motor with good cooling effect

Abstract

A dust collector motor with good cooling effect, comprising a shell, a wind cover, a moving impeller, a fixed impeller, a stator, and a rotor, the fixed impeller is connected to the end of the shell, the wind cover covers the fixed impeller, the moving impeller is arranged in the air inlet cavity surrounded by the wind cover and the fixed impeller, the stator is connected in the shell, the rotor is arranged in the stator, one end of the rotor is connected with the moving impeller in transmission through the fixed impeller and the shell, an air inlet channel is arranged on the wheel shaft of the fixed impeller, the air inlet of the air inlet channel is located on the side wall of the wheel shaft, the air outlet of the air inlet channel is located on the bottom of the wheel shaft, and the air outlet is communicated with the stator mounting cavity of the shell, the advantages of the utility model are that when the moving impeller guides wind, part of the wind energy can enter the stator mounting cavity of the shell through the air outlet along the air inlet channel, so that the direct cooling of the rotor and the stator of the motor by the cold zone wind is realized, and the cooling effect is good.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum cleaner motors, and more particularly to a vacuum cleaner motor with good cooling effect. Background Technology

[0002] A Chinese invention patent, CN201610172171.1, entitled "Cooling Device for Brushless Vacuum Cleaner Motor," discloses a cooling device for a brushless vacuum cleaner motor. This device includes a moving impeller shroud, a moving impeller, a fixed impeller, and a motor housing. The moving impeller shroud is located outside the moving impeller. The cooling device also includes a motor shroud located outside the motor housing. The motor shroud has an end portion and a peripheral portion, with a gap between the peripheral portion and the motor housing. An airflow channel is formed between the moving impeller shroud, the fixed impeller, the motor shroud, and the motor housing. This invention can be used in various vacuum cleaner motors or similar motor structures, offering advantages such as rapidly reducing motor heat and lowering housing temperature. However, the airflow channel is separated from the stator and rotor by the motor housing, leaving room for improvement in cooling efficiency. Therefore, the structure of this cooling device requires further refinement. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a vacuum cleaner motor with a compact structure and good cooling effect that can directly blow cooling air to the rotor and stator of the motor, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: This vacuum cleaner motor with good cooling effect includes a housing, a fan shroud, a moving impeller, a fixed impeller, a stator, and a rotor. The fixed impeller is connected to the end of the housing, the fan shroud covers the fixed impeller, the moving impeller is disposed in the air inlet cavity formed by the fan shroud and the fixed impeller, the stator is connected inside the housing, the rotor passes through the stator, and one end of the rotor passes through the fixed impeller and the housing and is connected to the moving impeller for transmission. The feature is that an air inlet channel is provided on the wheel shaft of the fixed impeller, the air inlet of the air inlet channel is located on the side wall of the wheel shaft, the air outlet of the air inlet channel is located at the bottom of the wheel shaft, and the air outlet is connected to the stator mounting cavity of the housing.

[0005] As an improvement, the impeller preferably includes an impeller seat and an impeller body. A top groove for placing the impeller body is provided on the top of the impeller seat. The impeller body is detachably connected to the impeller seat. Impeller seat through holes are distributed on the bottom surface of the top groove, and a connecting groove is provided on the bottom surface of the impeller body. The connecting groove and the impeller seat through holes communicate with each other to form an air inlet channel. This structure reduces the processing difficulty of the air inlet channel.

[0006] In a further improvement, the impeller seat can preferably have a connecting protrusion in the middle, a limiting key is provided on the side wall of the connecting protrusion, a socket hole is provided in the middle of the impeller body, and a limiting groove is provided on the side wall of the socket hole. The impeller body is fitted onto the connecting protrusion, and the limiting key is inserted into the limiting groove. The impeller body is detachably connected to the impeller seat, and this prevents the impeller body from rotating relative to the impeller seat, resulting in a good connection effect.

[0007] Further improvements include the addition of threaded holes on the bottom surface of the top groove around the connecting protrusion, as well as corresponding threaded holes on the impeller body. The impeller body and impeller seat are then fixed together with screws. This prevents axial movement and circumferential rotation of the impeller body relative to the impeller seat, resulting in a good fixing effect.

[0008] A further improvement is made where impeller seat blades are preferably evenly distributed on the impeller seat, and impeller body blades are distributed on the impeller body. When the impeller body and impeller seat are fixed together, the impeller body blades and impeller seat blades form the blades of the fixed impeller. Increasing the blade area of ​​the fixed impeller improves the air guiding effect.

[0009] As an improvement, the impeller seat can preferably be integrally manufactured with the housing, resulting in a more compact structure.

[0010] As an improvement, the connecting protrusion can preferably extend beyond the end face of the fixed impeller, and a moving impeller recess that can extend into the connecting protrusion is provided at the bottom of the moving impeller. The structure becomes more compact.

[0011] As an improvement, the moving impeller can preferably be a conical impeller. This results in faster rotational speed and better airflow.

[0012] Further improvements include the option to include a tapered section at the opening of the shroud that conforms to the shape of the impeller, with the sidewalls of the tapered section being inwardly curved arcs. This reduces the space inside the shroud, allowing the impeller to evacuate the shroud cavity more quickly, resulting in better performance.

[0013] As an improvement, a groove can preferably be provided on the outer wall of the fixed impeller to facilitate the disassembly of the fan cover. This facilitates the removal of the fan cover.

[0014] Compared with the prior art, the advantages of this utility model are as follows: an air inlet channel is provided on the shaft of the impeller, the air inlet of the air inlet channel is located on the side wall of the shaft, the air outlet of the air inlet channel is located at the bottom of the shaft, and the air outlet is connected to the stator mounting cavity of the housing. In this way, when the impeller guides the air, part of the air energy enters the stator mounting cavity of the housing along the air inlet channel and through the air outlet, thereby realizing the direct cooling of the rotor and stator of the motor by the cold air in the cold zone, and the cooling effect is good. Attached Figure Description

[0015] Figure 1This is a perspective view of an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 A three-dimensional image from another angle;

[0017] Figure 3 yes Figure 1 A bottom view;

[0018] Figure 4 yes Figure 3 Cross-sectional view along line AA;

[0019] Figure 5 yes Figure 2 Exploded structural diagram;

[0020] Figure 6 yes Figure 5 Further structural decomposition diagram;

[0021] Figure 7 yes Figure 6 A top view after removing the disassembled shroud and impeller;

[0022] Figure 8 yes Figure 7 Cross-sectional view along the BB line;

[0023] Figure 9 yes Figure 6 A three-dimensional view from another angle after the disassembled shroud and impeller have been removed;

[0024] Figure 10 yes Figure 6 Enlarged view of section I. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 10 As shown, the vacuum cleaner motor with good cooling effect in this embodiment includes a housing 1, a fan shroud 3, a moving impeller 4, a fixed impeller 2, a stator 5, and a rotor 6. The fixed impeller 2 is connected to the end of the housing, the fan shroud 3 covers the fixed impeller 2, the moving impeller 4 is disposed in the air inlet cavity formed by the fan shroud 3 and the fixed impeller 2, the stator 5 is connected inside the housing 1, and the rotor 6 passes through the stator 5. One end of the rotor 6 passes through the fixed impeller 2 and the housing 1 and is connected to the moving impeller 4 for transmission. The specific structure of the stator 5 and the rotor 6, as well as the specific structure of their connection with the housing 1, are known technologies and will not be described in detail. The fixed impeller consists of an outer ring 24, a wheel shaft 21, and fixed impeller blades. The wheel shaft 21 is connected to the housing 1, the outer ring 24 is connected to the fan shroud 3, and the fixed impeller blades connect the outer ring 24 and the wheel shaft 21.

[0027] An air inlet channel is provided on the shaft 21 of the impeller 2. The air inlet 201 of the air inlet channel is located on the side wall of the shaft 21, and the air outlet 202 of the air inlet channel is located at the bottom of the shaft 21. The air outlet 202 is connected to the stator mounting cavity 11 of the housing 1.

[0028] The impeller 2 includes an impeller seat 20 and an impeller body 22. A top groove 203 is provided on the top of the impeller seat 20 to accommodate the impeller body 22. The impeller body 22 is detachably connected to the impeller seat 20. Impeller seat through holes 204 are distributed on the bottom surface of the top groove 203, and a connecting groove 221 is provided on the bottom surface of the impeller body 22. The connecting groove 221 and the impeller seat through holes 204 communicate with each other to form an air inlet channel. The impeller seat 20 is integrally manufactured with the housing 1.

[0029] A connecting protrusion 211 is provided in the middle of the impeller seat 20. A limiting key 2111 is provided on the side wall of the connecting protrusion 211. A sleeve hole is provided in the middle of the impeller body 22. A limiting groove is provided on the side wall of the sleeve hole. The impeller body 22 is fitted onto the connecting protrusion 211, and the limiting key 2111 is inserted into the limiting groove. Threaded holes 2031 are distributed on the bottom surface of the top groove around the connecting protrusion 211. Threaded holes 2031 are also distributed at corresponding positions on the impeller body 22. The impeller body 22 and the impeller seat 20 are fixed together by screws.

[0030] Impeller seat blades 205 are evenly distributed on the impeller seat 20, and impeller body blades 222 are distributed on the impeller body 22. When the impeller body 22 and the impeller seat 20 are fixed together, the impeller body blades 222 and the impeller seat blades 205 form a fixed impeller blade.

[0031] A connecting protrusion 211 extends from the end face of the fixed impeller 2, and a moving impeller recess 41 is provided at the bottom of the moving impeller 4, which can extend into the connecting protrusion 211. The moving impeller 4 is a conical impeller. The opening of the shroud 3 is provided with a waisted portion 31 that matches the shape of the moving impeller 4, and the side wall of the waisted portion 31 is an inwardly curved arc surface. A groove 23 is provided on the outer wall of the fixed impeller 2 to facilitate the disassembly of the shroud 3.

[0032] Working principle: When the moving impeller rotates, it creates a vacuum in the inner cavity of the shroud and discharges the intake air from the gap between the blades of the fixed impeller into the casing. Since there are air inlet channels distributed on the shaft of the fixed impeller, some of the air enters the stator mounting cavity of the casing along the air inlet channels. The cooling air directly cools the stator and rotor, resulting in good cooling effect.

Claims

1. A vacuum cleaner motor with good cooling effect, comprising a housing (1), a fan shroud (3), a moving impeller (4), a fixed impeller (2), a stator (5), and a rotor (6), wherein the fixed impeller (2) is connected to the end of the housing, the fan shroud (3) covers the fixed impeller (2), the moving impeller (4) is disposed in the air inlet cavity formed by the fan shroud (3) and the fixed impeller (2), the stator (5) is connected inside the housing (1), the rotor (6) passes through the stator (5), and one end of the rotor (6) passes through the fixed impeller (2) and the housing (1) and is connected to the moving impeller (4) for transmission, characterized in that: An air inlet channel is provided on the shaft (21) of the impeller (2). The air inlet (201) of the air inlet channel is located on the side wall of the shaft (21), and the air outlet (202) of the air inlet channel is located at the bottom of the shaft (21). The air outlet (202) is connected to the stator mounting cavity (11) of the housing (1).

2. The vacuum cleaner motor according to claim 1, characterized in that: The fixed impeller (2) includes an impeller seat (20) and an impeller body (22). A top groove (203) for placing the impeller body (22) is provided on the top of the impeller seat (20). The impeller body (22) is detachably connected to the impeller seat (20). Impeller seat through holes (204) are distributed on the bottom surface of the top groove (203). A connecting groove (221) is provided on the bottom surface of the impeller body (22). The connecting groove (221) and the impeller seat through holes (204) are interconnected to form an air inlet channel.

3. The vacuum cleaner motor according to claim 2, characterized in that: The impeller seat (20) has a connecting protrusion (211) in the middle, a limit key (2111) is provided on the side wall of the connecting protrusion (211), a socket hole is provided in the middle of the impeller body (22), a limit groove is provided on the side wall of the socket hole, the impeller body (22) is fitted on the connecting protrusion (211), and the limit key (2111) is inserted into the limit groove.

4. The vacuum cleaner motor according to claim 3, characterized in that: Threaded holes (2031) are distributed on the bottom surface of the top groove around the connecting protrusion (211), and threaded holes (2031) are also distributed at the corresponding positions on the impeller body (22). The impeller body (22) and the impeller seat (20) are fixed together by screws.

5. The vacuum cleaner motor according to claim 4, characterized in that: Impeller seat blades (205) are evenly distributed on the impeller seat (20), and impeller body blades (222) are distributed on the impeller body (22). When the impeller body (22) and the impeller seat (20) are fixed together, the impeller body blades (222) and the impeller seat blades (205) form the blades of the fixed impeller (2).

6. The vacuum cleaner motor according to any one of claims 2 to 5, characterized in that: The impeller seat (20) is integrally formed with the housing (1).

7. The vacuum cleaner motor according to any one of claims 3 to 5, characterized in that: The connecting protrusion (211) extends out of the end face of the fixed impeller (2), and a moving impeller recess (41) that can extend into the connecting protrusion (211) is provided at the bottom of the moving impeller (4).

8. The vacuum cleaner motor according to any one of claims 1 to 5, characterized in that: The moving impeller (4) is a conical impeller.

9. The vacuum cleaner motor according to claim 8, characterized in that: The opening of the wind shield (3) is provided with a waist section (31) that can be adapted to the shape of the impeller (4), and the side wall of the waist section (31) is an inwardly curved arc surface.

10. The vacuum cleaner motor according to any one of claims 1 to 5, characterized in that: The outer wall of the fixed impeller (2) is provided with an outer wall groove (23) that allows the wind cover (3) to be easily disassembled.

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