Motor and vacuum cleaner

Abstract

The present application relates to a motor and a vacuum cleaner. The motor comprises a motor support, a motor main body and brush assemblies, wherein a mounting chamber and mounting slots are provided in the motor support; a cooling impeller is provided in the mounting chamber, the mounting chamber being communicated with the mounting slots; the motor main body is installed on the motor support, the motor main body comprising a rotating shaft; an end part of the rotating shaft extends into the mounting chamber, the cooling impeller being fixedly installed on the rotating shaft; the brush assemblies are arranged on the motor support, and the brush assemblies each comprise a brush and a brush holder, the brushes being mounted inside the brush holders; heat dissipation channels are provided on the brushes, the heat dissipation channels running through the brushes in the length direction thereof; heat dissipation holes are provided in the brush holders, the heat dissipation holes leading to the mounting chamber. The present application can solve the problem of poor heat dissipation effects of miniaturized motors of upright vacuum cleaners in the prior art.

Description

Motors and vacuum cleaners

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 11, 2023, with application number 202311698122.8 and invention name “Motor and Vacuum Cleaner”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of dust collection devices, and in particular to a motor and a dust collector. Background Art

[0003] At present, upright vacuum cleaner motors tend to be continuously miniaturized while meeting power requirements, which can reduce the production cost of the motors.

[0004] However, as motors continue to become smaller, heat dissipation issues remain in the design process: (1) After miniaturization, the cross-sectional area of ​​the brush decreases, which increases the current density, causing the brush temperature to rise and aggravating brush wear, which cannot meet the life requirements during use; (2) Due to the influence of the traditional vacuum cleaner structure, the brush assembly of the upright vacuum cleaner motor on the market is installed far away from the cooling fan end, resulting in poor heat dissipation after miniaturization and the motor temperature rise cannot meet the requirements. Summary of the Invention

[0005] The main purpose of the present application is to provide a motor and a vacuum cleaner to solve the problem of poor heat dissipation effect after the motor of an upright vacuum cleaner in the prior art is miniaturized.

[0006] According to one aspect of the present application, a motor is provided, comprising a motor bracket, a motor body, and a brush assembly.

[0007] The motor bracket is provided with an installation cavity and an installation slot, a cooling impeller is provided in the installation cavity, and the installation cavity is communicated with the installation slot;

[0008] The motor body is mounted on the motor bracket, the motor body includes a rotating shaft, an end of the rotating shaft extends into the mounting cavity, and the cooling impeller is fixedly mounted on the rotating shaft;

[0009] The brush assembly is arranged on the motor bracket, and the brush assembly includes a brush and a brush barrel. The brush is installed in the brush barrel, and the brush barrel is provided with a heat dissipation hole, which is connected to the installation cavity. The brush is provided with a heat dissipation groove, which is arranged to pass through along the length direction of the brush.

[0010] Furthermore, the motor bracket includes a bracket body and a wind cover, the motor body is installed on the bracket body, the wind cover is buckled on the side of the bracket body away from the motor body and is surrounded by the bracket body to form the installation cavity, and the installation groove is arranged on the bracket body and extends radially along the rotating shaft.

[0011] Furthermore, a ventilation opening is provided on one side of the bracket body close to the installation cavity, and the ventilation opening is used to connect the installation slot and the installation cavity.

[0012] Furthermore, the brush holder is arranged in an elongated strip shape, the length direction of the brush holder is consistent with the radial direction of the rotating shaft, and the heat dissipation holes are provided on at least one side of the brush holder close to the installation cavity and one side away from the installation cavity.

[0013] Furthermore, the brush holder is arranged in a rectangular parallelepiped, and there are a plurality of heat dissipation holes, which are dispersedly arranged on the surface and edges of the rectangular parallelepiped.

[0014] Furthermore, the heat dissipation groove is provided on at least one side of the brush close to the installation cavity and one side away from the installation cavity.

[0015] Furthermore, the side wall of the brush holder is arched in a direction away from the brush so as to form a ventilation channel between the inner wall surface of the brush holder and the brush.

[0016] Furthermore, the brush holder is installed in the installation slot through a snap assembly.

[0017] Furthermore, a pressure plate is provided on the brush barrel, and the pressure plate is bent to stop the end face of the brush barrel and cover the end face of the brush barrel. A wire groove is provided on the pressure plate, and the brush assembly also includes a brush lead. The brush lead passes through the wire groove and is welded to the pressure plate and then electrically connected to the brush from the inside of the brush barrel.

[0018] On the other hand, the present application also provides a vacuum cleaner, characterized in that the vacuum cleaner includes the above-mentioned motor.

[0019] In the present application, since the brush barrel of the brush assembly in the present application is provided with a heat dissipation hole connected to the installation cavity, and the brush is provided with a heat dissipation groove. When the motor is working, the rotating shaft rotates, which can drive the cooling impeller to rotate in the installation cavity. At this time, the cooling impeller draws air, and the air outside the motor can flow along the heat dissipation groove, the heat dissipation hole and the installation cavity in sequence and then flow into the external space of the motor, thereby forming a circulating cooling flow channel, which is convenient for effectively dissipating heat from the motor. In other words, the improvement of the motor structure in the present application can adapt to the heat dissipation requirements of the motor and its brush assembly after miniaturization design, and can ensure the service life of the motor to a certain extent.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] FIG1 is a cross-sectional view of a motor disclosed in an embodiment of the present application;

[0024] FIG2 is an exploded view of the motor disclosed in an embodiment of the present application;

[0025] FIG3 is a three-dimensional structural diagram of the bracket body disclosed in an embodiment of the present application;

[0026] FIG4 is a three-dimensional structural diagram of the brush assembly disclosed in an embodiment of the present application when installed on the bracket body;

[0027] FIG5 is a top view of FIG4;

[0028] FIG6 is a three-dimensional structural diagram of the brush assembly disclosed in an embodiment of the present application at a first viewing angle;

[0029] FIG7 is a perspective structural diagram of the brush assembly disclosed in an embodiment of the present application at a second viewing angle;

[0030] FIG8 is a cross-sectional view of the brush assembly disclosed in an embodiment of the present application.

[0031] Among them, the above drawings include the following figure marks: 10, motor bracket; 11, bracket body; 12, wind cover; 101, installation cavity; 102, ventilation opening; 103, installation slot; 20, motor body; 21, rotating shaft; 22, housing component; 23, stator; 24, rotor; 30, brush assembly; 31, brush; 311, heat dissipation slot; 32, brush tube; 321, heat dissipation hole; 322, pressure plate; 3221, wire groove; 33, brush lead; 34, elastic element; 40, snap assembly; 41, snap cam; 42, snap slot; 50, commutator; 60, cooling impeller. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] 1 to 8 , according to an embodiment of the present application, a motor is provided. The motor includes a motor bracket 10 , a motor body 20 , and a brush assembly 30 .

[0034] Among them, the motor bracket 10 is provided with an installation cavity 101 and a installation groove 103, the installation cavity 101 is provided with a cooling impeller 60, and the installation cavity 101 is communicated with the installation groove 103; the motor body 20 is installed on the motor bracket 10, and the motor body 20 includes a rotating shaft 21, the end of the rotating shaft 21 extends into the installation cavity 101, and the cooling impeller 60 is fixedly installed on the rotating shaft 21; the brush assembly 30 is provided on the motor bracket 10, and the brush assembly 30 includes a brush 31 and a brush holder 32, the brush 31 is installed in the brush holder 32, and the brush 31 is provided with a heat dissipation groove 311, the heat dissipation groove 311 is arranged to pass through along the length direction of the brush 31, and the brush holder 32 is provided with a heat dissipation hole 321, which is communicated with the installation cavity 101.

[0035] Since the brush barrel 32 of the brush assembly 30 in this embodiment is provided with a heat dissipation hole 321 connected to the mounting cavity 101, and the brush 31 is provided with a heat dissipation groove 311. When the motor is working, the rotating shaft 21 rotates, which can drive the cooling impeller 60 to rotate in the mounting cavity 101. At this time, the cooling impeller 60 draws air, and the air outside the motor can flow along the heat dissipation groove 311, the heat dissipation hole 321 and the mounting cavity 101 in sequence and then flow into the external space of the motor, thereby forming a circulating cooling flow channel, which is convenient for effectively dissipating heat from the motor. In other words, the improvement of the motor structure in this embodiment can adapt to the heat dissipation requirements of the motor and its brush assembly 30 after miniaturization design, and can ensure the service life of the motor to a certain extent.

[0036] 1 to 4 , the motor body 20 in this embodiment further includes a housing 22, a stator 23, and a rotor 24. The housing 22 defines a mounting cavity, the stator 23 is secured within the mounting cavity, the rotor 24 is disposed within the stator 23, and the rotating shaft 21 extends through the rotor 24 and out of the housing 22. The housing 22 is secured to the motor bracket 10 by screws, pins, snaps, or welding, resulting in a simple structure and ease of assembly.

[0037] Furthermore, the motor bracket 10 in this embodiment includes a bracket body 11 and a fan hood 12. The motor body 20 is mounted on the bracket body 11. The fan hood 12 is buckled on the side of the bracket body 11 away from the motor body 20 and surrounds the bracket body 11 to form the above-mentioned installation cavity 101. The installation groove 103 is provided on the bracket body 11 and extends along the radial direction of the rotating shaft 21. In this embodiment, by providing the fan hood 12 on the side of the bracket body 11 away from the motor body 20, the cooling impeller 60 can be protected to prevent the cooling impeller 60 from being exposed to the outer surface of the motor and to prevent the cooling impeller 60 from colliding with other structures and damaging the cooling impeller 60. Optionally, in this embodiment, a through-hole structure is provided on the fan hood 12 to facilitate convection between the air in the installation cavity 101 and the air outside the motor.

[0038] Furthermore, in this embodiment, there are two brush assemblies 30 and two mounting slots 103. Both mounting slots 103 are provided on the bracket body 11. The two brush assemblies 30 and the two mounting slots 103 are provided in a one-to-one correspondence and are respectively located on opposite sides of the rotating shaft 21. In this way, the space on the bracket body 11 can be reasonably utilized, which makes it easier to realize the miniaturization design of the motor.

[0039] In this embodiment, a ventilation opening 102 is provided on one side of the bracket body 11 close to the mounting cavity 101, and the ventilation opening 102 connects the mounting groove 103 and the mounting cavity 101. When the motor is working and drives the cooling impeller 60 to rotate, air can enter the mounting cavity 101 along the heat dissipation groove 311, the heat dissipation hole 321, and the ventilation opening 102, and finally flow out of the motor and into the external space of the motor. In this embodiment, the ventilation opening 102 is provided on the side of the bracket body 11 close to the mounting cavity 101, which can reduce wind resistance and allow cooling air to flow smoothly between the mounting groove 103 and the mounting cavity 101. During actual processing, the ventilation opening 102 can be as large as possible to ensure that there is enough space for air to circulate, which can improve the heat dissipation effect of the motor in this embodiment.

[0040] [Corrected on 23.01.2025 according to Rule 91] Again in conjunction with Figures 1 to 8, the brush holder 32 in this embodiment is arranged in the shape of an elongated strip, and the length direction of the brush holder 32 is consistent with the radial direction of the rotating shaft 21, so as to facilitate installation in the mounting groove 103. The brush holder 32 is provided with heat dissipation holes 321 on at least one side close to the mounting cavity 101 and one side away from the mounting cavity 101. In other words, the heat dissipation holes 321 in this embodiment can be provided on the side walls of the brush holder 32 close to and away from the mounting cavity 101, or can be provided on the side walls and other side walls of the brush holder 32 close to and away from the mounting cavity 101 at the same time. Figures 7 to 8 of this application show the situation when the heat dissipation holes 321 are provided on the side close to and away from the mounting cavity 101. In this embodiment, the heat dissipation holes 321 are arranged on the side of the brush holder 32 close to the mounting cavity 101, which makes it easier for the flowing air in the brush holder 32 to quickly enter the mounting cavity 101; and the heat dissipation holes 321 are arranged on the side of the brush holder 32 away from the mounting cavity 101, so that the brush assembly 30 can be cooled on the side away from the mounting cavity 101, and then the heat dissipation holes 321 on the side close to the mounting cavity 101 can be coordinated to fully cool the entire brush assembly 30.

[0041] [Corrected 23.01.2025 in accordance with Rule 91] Optionally, the brush holder 32 in this embodiment may have a cylindrical or prismatic structure. Figures 7 and 8 of this embodiment illustrate a case where the brush holder 32 is arranged in a rectangular parallelepiped. Accordingly, a plurality of heat dissipation holes 321 are provided, with the plurality of heat dissipation holes 321 dispersedly disposed on the surface and edges of the rectangular parallelepiped. In this embodiment, by distributing the heat dissipation holes 321 on the surface and edges of the rectangular parallelepiped, heat is dissipated from the brush assembly 30 in all directions while also avoiding the problem of concentrated heat dissipation holes 321 in a single area of ​​the brush holder 32, which would reduce the structural strength of the brush holder 32.

[0042] Furthermore, in an unillustrated embodiment of the present application, the side wall of the brush holder 32 is arched in a direction away from the brush 31. Such a configuration can form a ventilation channel between the inner wall surface of the brush holder 32 and the brush 31. When the motor is working, the rotating shaft 21 rotates, which can drive the cooling impeller 60 to rotate in the installation cavity 101. At this time, the cooling impeller 60 draws air, and the air outside the motor can flow along the ventilation channel and the heat dissipation groove 311, the heat dissipation hole 321 and the installation cavity 101 between the brush holder 32 and the brush 31, and then flow into the external space of the motor, so as to effectively dissipate heat from the motor.

[0043] [Corrected 23.01.2025 according to Rule 91] Furthermore, the brush 31 in this embodiment is provided with the aforementioned heat dissipation groove 311 on at least one side close to the mounting cavity 101 and one side away from the mounting cavity 101. That is, the heat dissipation groove 311 in this embodiment can be provided on both the side close to and away from the mounting cavity 101 of the brush 31, or can be provided on both the side close to and away from the mounting cavity 101 and other sides of the brush 31. Figure 7 of the present application shows the case where the heat dissipation groove 311 is provided on both the side close to and away from the mounting cavity 101 of the brush 31. Such a configuration not only facilitates the flow of air into the heat dissipation groove 311, but also facilitates comprehensive cooling of the brush 31.

[0044] During actual installation, the brush holder 32 in this embodiment is installed in the mounting groove 103 via a snap assembly 40. Specifically, the snap assembly 40 in this embodiment includes a latch 41 and a latch slot 42. One of the latch 41 and the latch slot 42 is provided on the bracket body 11, and the other is provided on the brush holder 32. The mating connection between the latch 41 and the latch slot 42 facilitates assembly and disassembly of the brush holder 32. Of course, in other embodiments of the present application, the brush holder 32 can also be connected and fixed in the mounting groove 103 by screws, bolts, bonding, welding, etc. As long as these other variations are based on the concept of the present application, they are within the scope of protection of the present application.

[0045] Furthermore, the brush barrel 32 in this embodiment is provided with a pressure plate 322, which is bent to stop and cover the end surface of the brush barrel 32. The pressure plate 322 is provided with a wire groove 3221. The brush assembly 30 also includes a brush lead 33. The brush lead 33 passes through the wire groove 3221 and is welded to the pressure plate 322, then passes through the brush barrel 32 and is electrically connected to the brush 31. In actual processing, the pressure plate 322 is integrally provided with the brush barrel 32, and the brush lead 33 is welded to the inner side of the pressure plate 322 and then passes through the wire groove 3221. This structure is stable and reliable, and the brush lead 33 is unlikely to fall off from the brush 31.

[0046] As shown in Figures 1 to 8 , the motor in this embodiment further includes a commutator 50, which is fixed to the motor bracket 10 and sleeved on the outer circumference of the rotating shaft 21. The brush assembly 30 further includes an elastic element 34, which abuts between the brush barrel 32 and the brush 31 so that the brush 31 abuts against the commutator 50 along the radial direction of the rotating shaft 21, allowing the brush 31 to stably contact the commutator 50. Optionally, the elastic element 34 in this embodiment may be a spring, or an elastic column, etc., and any other variations based on the concept of this application are within the scope of protection of this application.

[0047] From the above description, it can be seen that the brush 31 of the brush assembly 30 of the motor in this embodiment has a heat dissipation groove 311 in the middle of the upper and lower ends; the brush tube 32 has a heat dissipation hole 321 at the upper end and edge; the brush lead 33 passes through the inner hole of the spring, passes through the inner hole of the brush tube 32, and is then spot welded to the pressure plate 322. After compressing the spring, the pressure plate 322 is bent to complete the assembly of the brush assembly 30.

[0048] The bracket body 11 is provided with a mounting groove 103 and a ventilation opening 102 . The ventilation opening 102 communicates with the mounting groove 103 and the mounting cavity 101 , so as to facilitate the delivery of flowing air.

[0049] When the motor is assembled, the two brush assemblies 30 are respectively inserted into the mounting grooves 103 at both ends of the bracket body 11 and fixed to the bracket body 11 through the snap assembly 40. A cooling impeller 60 is pressed on the rotating shaft 21 at the upper end of the bracket body 11. When the motor is working, the rotating shaft 21 rotates to cause the cooling impeller 60 to quickly draw air. The air in the heat dissipation grooves 311 at the upper and lower ends of the brush 31 carries the heat generated by the brush and is drawn away by the cooling impeller 60 through the heat dissipation holes 321 around the brush tube 32 through the air duct of the wind cover 12. With the continuous replenishment of external air, a circulating exhaust cooling system is formed, thereby keeping the brushes between reasonable operating temperatures.

[0050] The inventors of this application have demonstrated through practical tests that, when used in vacuum cleaner motors with a power range of 1050W to 1400W, the brush assembly temperature can be controlled between 60°C and 85°C, maintaining a good brush wear state over its lifespan. Heat dissipation slots are provided in the middle of the upper and lower ends of the brush, while heat dissipation holes are provided around the brush barrel, allowing the brush to quickly dissipate heat during operation. The brush assembly is designed near the cooling blades, allowing heat from the brush barrel surface to be promptly carried away by the cooling blades through the air duct, thereby maintaining the brush at a reasonable operating temperature. The brush assembly integrates the brush, spring, and brush barrel into a single component through spot welding, effectively reducing costs by 30% while facilitating easy replacement.

[0051] On the other hand, the present application also provides a vacuum cleaner, which includes the motor in the above embodiment, and thus includes all the technical effects of the above motor. Since the technical effects of the motor have been described in detail above, they will not be repeated here.

[0052] 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 entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0053] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A motor, comprising a motor bracket, a motor body and a brush assembly, characterized in that: The motor bracket is provided with an installation cavity and an installation groove, a cooling impeller is provided in the installation cavity, and the installation cavity is communicated with the installation groove; The motor body is mounted on the motor bracket, the motor body comprises a rotating shaft, an end of the rotating shaft extends into the mounting cavity, and the cooling impeller is fixedly mounted on the rotating shaft; The brush assembly is arranged on the motor bracket, and the brush assembly includes a brush and a brush barrel. The brush is installed in the brush barrel, and the brush barrel is provided with a heat dissipation hole, the heat dissipation hole is communicated with the installation cavity, and the brush is provided with a heat dissipation groove, and the heat dissipation groove is arranged through the length direction of the brush.

2. The motor according to claim 1, characterized in that The motor bracket includes a bracket body and a wind cover, the motor body is installed on the bracket body, the wind cover is buckled on the side of the bracket body away from the motor body and is surrounded by the bracket body to form the installation cavity, and the installation groove is arranged on the bracket body and extends radially along the rotating shaft.

3. The motor according to claim 2, characterized in that A ventilation opening is provided on one side of the bracket body close to the installation cavity, and the ventilation opening is used to connect the installation slot and the installation cavity.

4. The motor according to claim 1, characterized in that The brush holder is arranged in a long strip shape, the length direction of the brush holder is consistent with the radial direction of the rotating shaft, and the heat dissipation holes are arranged on at least one side of the brush holder close to the installation cavity and one side away from the installation cavity.

5. The motor according to claim 4, characterized in that: The brush holder is in the shape of a rectangular parallelepiped, and there are a plurality of heat dissipation holes, which are dispersedly arranged on the surface and edges of the rectangular parallelepiped.

6. The motor according to claim 1, characterized in that The heat dissipation groove is provided on at least one side of the brush close to the installation cavity and one side away from the installation cavity.

7. The motor according to claim 1, characterized in that The side wall of the brush holder is arched in a direction away from the brush so as to form a ventilation channel between the inner wall surface of the brush holder and the brush.

8. The motor according to claim 1, characterized in that The brush barrel is installed in the installation groove through a buckle assembly.

9. The motor according to claim 1, characterized in that A pressing plate is arranged on the brush barrel, the pressing plate is bent and stopped at the end surface of the brush barrel and covers the end surface of the brush barrel, a wire groove is arranged on the pressing plate, and the brush assembly also includes a brush lead, which passes through the wire groove and is welded and fixed on the pressing plate and then is electrically connected to the brush from the inside of the brush barrel.

10. A vacuum cleaner, characterized in that: The vacuum cleaner comprises the motor according to any one of claims 1 to 9.

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