High-efficiency high-speed dust collector motor

Abstract

The utility model discloses a high-efficiency high-speed dust collector motor. Comprising a fan shell, a motor shell and an impeller shell, a stator is fixedly arranged in the motor shell, a rotor transversely penetrates through the middle of the stator, a protection cover is fixedly installed at the other end, opposite to the impeller shell, of the motor shell, and the protection cover and the impeller shell are provided with a first bearing installation cavity and a second bearing installation cavity respectively. The bearing of the rotor is independently arranged in the semi-closed bearing mounting cavity, so that wind cannot penetrate through the bearing, the bearing mounting cavity is shielded by the protective cover, the impeller shell and the impeller, direct contact between the bearing and the air duct is isolated, meanwhile, the stator is not directly exposed in the air duct, and the service life of the stator is prolonged. Therefore, the stator iron core and the bearing can be effectively protected in a specific working environment of the dust collector, so that the service life of the motor is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of vacuum cleaner motor technology, and in particular to a high-efficiency, high-speed vacuum cleaner motor. Background Technology

[0002] As we all know, the vacuum cleaner motor is the heart of a vacuum cleaner, so its quality directly affects the vacuum cleaner's performance. Currently, existing vacuum cleaner motors are designed with the stator located within the air duct, relying primarily on airflow to dissipate heat from the stator. This is because the coils on the stator generate heat during operation, and accumulated heat can shorten the motor's lifespan. The airflow from the motor helps to expel this heat. However, in these designs, the stator is exposed within the air duct, and since the rotor is located in the middle of the stator, the rotor bearings are also exposed. In the environment of a vacuum cleaner, there may be water or large dust particles. Prolonged direct contact with these particles can easily damage the bearings or stator core, thus affecting the motor's lifespan. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a high-efficiency, high-speed vacuum cleaner motor.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A high-efficiency, high-speed vacuum cleaner motor includes a fan housing, a motor housing, and an impeller housing. The impeller housing is fixedly installed at one end of the motor housing. An air guide cavity is formed at one end of both the impeller housing and the motor housing. The fan housing is fitted over the motor housing, and a flow channel is formed between the fan housing and the motor housing, communicating with the air guide cavity. A stator is fixedly installed inside the motor housing, and a rotor transversely passes through the middle of the stator. A protective cover is fixedly installed at the other end of the motor housing opposite the impeller housing. The protective cover and the impeller housing... The shell is provided with a first bearing mounting cavity and a second bearing mounting cavity. Both the first bearing mounting cavity and the second bearing mounting cavity are semi-enclosed structures. One end of the rotor is mounted in the first bearing mounting cavity through a bearing, and the other end of the rotor is mounted in the second bearing mounting cavity through a bearing. An impeller is fixed on the rotor and placed in the air guide cavity. The impeller is conical and has an impeller surface on its side. The impeller shell has a receiving groove on the end face of the impeller shell located in the second bearing mounting cavity. The end of the impeller is placed in the receiving groove and covers the second bearing mounting cavity.

[0006] Preferably, the outer end face of the impeller is bucket-shaped, and the receiving groove gradually slopes outward from the opening of the second bearing mounting cavity as the center, so that the receiving groove and the outer end face of the impeller are mutually adapted.

[0007] Preferably, the impeller is a worm gear impeller structure.

[0008] Preferably, the number of blades on the impeller is a prime number.

[0009] Preferably, the motor housing has a hole at one end of the air guide cavity, the hole is in communication with the interior of the motor housing, and an air guide channel is formed between the end of the motor housing near the protective cover and the inner wall of the protective cover, the air guide channel is in communication with the flow guide channel.

[0010] Preferably, at least one pre-compressed spring is provided inside the first bearing mounting cavity or the second bearing mounting cavity, and the pre-compressed spring comes into contact with the bearing on the rotor.

[0011] Preferably, the fan housing is provided with a circuit board electrically connected to the stator in the flow channel.

[0012] Preferably, the impeller housing itself has a conduction port, which is connected to the air guide cavity. At least two blade rings are provided in the conduction port, and each blade ring has guide vanes arranged in a ring array. The tilt angle of the guide vanes on the blade rings closer to the inner side is smaller than the tilt angle of the guide vanes on the blade rings closer to the outer side.

[0013] Preferably, annular grooves are provided at the connection between the fan housing and the motor housing, the connection between the motor housing and one of the blade rings, and the connection between the blade rings.

[0014] By adopting the above-mentioned solution, this utility model relies on setting the rotor bearing separately in a semi-enclosed bearing mounting cavity to prevent air from passing through the bearing. The protective cover, impeller housing, and impeller shield the bearing mounting cavity, isolating the bearing from direct contact with the air duct. At the same time, the stator is no longer directly exposed in the air duct. In this way, the stator core and bearing can be effectively protected in the specific working environment of the vacuum cleaner, thereby extending the service life of the motor. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a cross-sectional view of an embodiment of the present utility model.

[0017] Figure 3 This is an exploded view of an embodiment of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] like Figures 1 to 3As shown, this embodiment provides a high-efficiency, high-speed vacuum cleaner motor, including a fan housing 1, a motor housing 2, and an impeller housing 3. The impeller housing 3 is fixedly installed at one end of the motor housing 2. An air guide cavity 4 is formed at one end of both the impeller housing 3 and the motor housing 2. The fan housing 1 is fitted over the motor housing 2, and a flow guide channel 5 is formed between the fan housing 1 and the motor housing 2, communicating with the air guide cavity 4. A stator 6 is fixedly installed inside the motor housing 2, and a rotor 7 passes through the middle of the stator 6. A protective cover 8 is fixedly installed at the other end of the motor housing 2 opposite to the impeller housing 3. The protective cover 8 and the impeller housing 3 are respectively provided with a first bearing mounting cavity 9 and a second bearing mounting cavity 10. Both the first bearing mounting cavity 9 and the second bearing mounting cavity 10 are semi-closed structures (a semi-closed structure means that one end is open and the other end is sealed. With this design, airflow will not pass through the bearing mounting cavity and therefore will not pass through the bearing 11). One end of the rotor 7 is installed in the first bearing mounting cavity 9 through the bearing 11, and the other end of the rotor 7 is installed in the second bearing mounting cavity 10 through the bearing 11. An impeller 12 is fixed on the rotor 7. The impeller 12 is placed in the air guide cavity 4. The impeller 12 is conical and has an impeller surface on its side. The impeller housing 3 is provided with a receiving groove 13 on the end face of the second bearing mounting cavity 10. The end of the impeller 12 is placed in the receiving groove 13 and covers the second bearing mounting cavity 10.

[0022] This embodiment mainly relies on setting the bearing 11 of the rotor 7 in a separate semi-enclosed bearing mounting cavity to prevent air from passing through the bearing. The protective cover 8, impeller housing 3, and impeller 12 shield the bearing mounting cavity, isolating the bearing 11 from direct contact with the air duct. At the same time, the stator 6 is no longer directly exposed to the air duct. In this way, the stator core and bearing 11 can be effectively protected in the specific working environment of the vacuum cleaner, thereby extending the service life of the motor.

[0023] During operation, the stator 6 is energized, and the coils in the stator generate a corresponding magnetic field, which drives the rotor 7 to rotate. After the rotor 7 rotates, the impeller 12 also rotates synchronously, generating airflow in the air guide cavity 4. The direction of the airflow varies depending on the direction of rotation, and it remains consistent whether the airflow enters or exits from the impeller housing 3. Therefore, when the air pressure in the air guide cavity 4 changes, airflow passes between the guide channel 5 and the impeller housing 3, supplying the vacuum cleaner. The airflow is primarily guided through the air duct formed by the guide channel 5, the air guide cavity 4, and the impeller housing 3. The bearing 11 and the stator 6 are not directly exposed within the air duct, thus protecting them.

[0024] Furthermore, to better shield the bearing 11 at the impeller 12, the outer end face of the impeller 12 in this embodiment is funnel-shaped, and the receiving groove 13 gradually slopes outward from the cavity opening of the second bearing mounting cavity 10, so that the receiving groove 13 and the outer end face of the impeller 12 are mutually adapted. In this way, the impeller 12 can act as a cover to shield the bearing 11. Although there is a gap between the receiving groove 13 and the impeller 12, the second bearing mounting cavity 10 is a semi-closed structure with no front-to-back connection, so the air force from the air duct will not easily enter.

[0025] Furthermore, regarding the design of the impeller 12, in this embodiment, the impeller 12 is a worm gear impeller structure. Also, the number of blades on the impeller 12 is a prime number, and using prime blades can reduce resonance phenomena.

[0026] Furthermore, in order to allow some airflow to directly dissipate heat from the inside of the motor housing 2, a hole 14 is provided at one end of the motor housing 2 located in the air guide cavity 4 in this embodiment. The hole 14 is connected to the inside of the motor housing 2. An air guide channel 15 is formed between the end of the motor housing 2 that is closer to the protective cover 8 and the inner wall of the protective cover 8. The air guide channel 15 is connected to the flow channel 5. In this way, when working, the hole 14, the inside of the motor housing 2, the air guide channel 15, and the flow channel 5 are connected to each other, thereby removing the temperature inside the motor housing 2. Although this setting still allows the stator 6 to come into contact with the airflow to some extent, it is not directly exposed to the air duct, thus protecting the stator 6 to a great extent.

[0027] Furthermore, to make the rotor 7 more stable during operation, at least one pre-compressed spring 16 is provided inside the first bearing mounting cavity 9 or the second bearing mounting cavity 10 in this embodiment. The pre-compressed spring 16 forms contact with the bearing 11 on the rotor 7, so that the rotor 7 has a pre-compressed force, thereby making it more stable under high-speed rotation.

[0028] Furthermore, to better dissipate heat from the circuit board 17, the fan housing 1 in this embodiment is provided with a circuit board 17 electrically connected to the stator 6 located in the airflow channel 5. That is, the circuit board 17 is installed in the airflow channel 5, so that when airflow passes through, it can dissipate heat from the circuit board. Simultaneously, to improve the heat dissipation efficiency of the power components on the circuit board 17 and the protection level of the circuit board 17, the fan housing 1 can be made of thermally conductive metal or other materials with high thermal conductivity. When the circuit board 17 is placed in the airflow channel 5, the heat-generating power components on the circuit board 17 are attached to the fan housing 1 using thermally conductive silicone, and multiple heat dissipation fins are set on the inner wall surface of the fan housing 1 to further enhance heat dissipation efficiency.

[0029] Furthermore, regarding the impeller housing 3, in this embodiment, the impeller housing 3 itself forms a through port 31, which communicates with the air guide cavity 4. At least two blade rings 32 are disposed within the through port 31. Each blade ring 32 has guide vanes 33 arranged in a ring array. The inclination angle of the guide vanes 33 on the inner blade ring 32 is smaller than that on the outer blade ring 32. This design allows the guide vanes 33 closer to the inner edge to be more inclined. The number of guide vanes 33 on one blade ring is less, but the span between the guide vanes 33 is larger. The number of guide vanes 33 on the other blade ring 32 is more, but they are also more densely packed. A guide gap will be formed between the guide vanes 33. Under this setting, the guide gaps on different blade rings 32 will face different directions, reducing the direct flow of the air and thus diffuser the generated airflow. The two blade rings 32 play the role of secondary diffuser. Of course, the specific number of blade rings 32 is not limited in this embodiment.

[0030] Furthermore, since the fan housing 1 and motor housing 2, the motor housing 2 and impeller housing 3, and the blade rings 32 and 32 are all bonded with adhesive during actual assembly, annular grooves 100 are provided at the connection points between the fan housing 1 and motor housing 2, the connection points between the motor housing 2 and one of the blade rings 32, and the connection points between the blade rings 32 and 32 in this embodiment to make the bonding stronger. When bonding, adhesive is applied directly into the annular grooves 100, which allows the adhesive to remain and thus improves the bonding strength of the adhesive.

[0031] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-efficiency, high-speed vacuum cleaner motor, characterized in that: The device includes a fan housing, a motor housing, and an impeller housing. The impeller housing is fixedly installed at one end of the motor housing. A guide cavity is formed at one end of the impeller housing and the motor housing. The fan housing is fitted over the motor housing, and a flow channel is formed between the fan housing and the motor housing, communicating with the guide cavity. A stator is fixedly installed inside the motor housing, and a rotor passes through the middle of the stator. A protective cover is fixedly installed at the other end of the motor housing opposite the impeller housing. The protective cover and the impeller housing are respectively provided with a first bearing mounting cavity and a second bearing mounting cavity, both of which are semi-enclosed structures. One end of the rotor is mounted in the first bearing mounting cavity via a bearing, and the other end of the rotor is mounted in the second bearing mounting cavity via a bearing. An impeller is fixed on the rotor and placed within the guide cavity. The impeller is conical and has an impeller surface on its side. A receiving groove is provided on the end face of the impeller housing located where the second bearing mounting cavity is located. The end of the impeller is placed within the receiving groove and obstructs the second bearing mounting cavity.

2. The high-efficiency, high-speed vacuum cleaner motor as described in claim 1, characterized in that: The outer end face of the impeller is bucket-shaped, and the receiving groove gradually slopes outward from the opening of the second bearing mounting cavity as the center, so that the receiving groove and the outer end face of the impeller are mutually adapted.

3. The high-efficiency, high-speed vacuum cleaner motor as described in claim 2, characterized in that: The impeller is a worm gear impeller structure.

4. A high-efficiency, high-speed vacuum cleaner motor as described in claim 3, characterized in that: The number of blades on the impeller is a prime number.

5. A high-efficiency, high-speed vacuum cleaner motor as described in claim 1, characterized in that: The motor housing has a hole at one end of the air guide cavity, which is in communication with the interior of the motor housing. An air guide channel is formed between the end of the motor housing that is closer to the protective cover and the inner wall of the protective cover. The air guide channel is connected to the flow channel.

6. A high-efficiency, high-speed vacuum cleaner motor as described in claim 1, characterized in that: The first bearing mounting cavity or the second bearing mounting cavity is provided with at least one pre-compressed spring, which abuts against the bearing on the rotor.

7. A high-efficiency, high-speed vacuum cleaner motor as described in claim 1, characterized in that: The fan casing is located in the flow channel and has a circuit board electrically connected to the stator.

8. A high-efficiency, high-speed vacuum cleaner motor as described in claim 1, characterized in that: The impeller housing itself has a conduction port, which is connected to the air guide cavity. At least two blade rings are provided in the conduction port. Each blade ring has guide vanes arranged in a ring array. The tilt angle of the guide vanes on the blade rings closer to the inner side is smaller than the tilt angle of the guide vanes on the blade rings closer to the outer side.

9. A high-efficiency, high-speed vacuum cleaner motor as described in claim 8, characterized in that: Annular grooves are provided at the connection between the fan housing and the motor housing, the connection between the motor housing and one of the blade rings, and the connection between the blade rings.

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