A floor brush motor with extended lifespan

Abstract

This utility model relates to a floor brush motor with extended service life, comprising a housing, a stator assembly, a rotor assembly, a front cover, and a rear cover inside the housing. The rotor assembly includes a shaft, one end of which does not extend beyond the rear cover, and the other end extending beyond the front cover. A rotor core and a commutator are located in the middle of the shaft. The stator assembly includes a stator core and stator windings, and is equipped with a terminal assembly. An extended carbon brush assembly is snapped onto the rear cover corresponding to the rotor assembly. The carbon brush assembly includes a carbon brush holder that fits into the rotor assembly. The carbon brush holder has carbon brush sleeves symmetrically arranged at both ends extending beyond the outer edge of the rear cover. Carbon brushes are located inside the carbon brush sleeves, and an elastic constant pressure component is provided between the carbon brushes and the carbon brush sleeves. By fixing the carbon brush assembly to the rear cover and setting the elastic constant pressure component inside the carbon brush holder, the structure is reasonable, easy to install and remove, and can ensure the stability of the contact pressure between the carbon brush and the commutator, thereby reducing the wear rate and thus increasing the service life.

Description

Technical Field

[0001] This utility model relates to the field of floor brush motor technology, and in particular to a floor brush motor with extended lifespan. Background Technology

[0002] Currently, because floor brushes need to perform frequent commutation operations, carbon brush motors with mechanical commutators are often used. However, carbon brush motors rely on the rotation of the rotor, and the brushes are constantly rubbing against the commutator ring. Furthermore, electrical sparks can be generated at the moment of commutation, causing erosion. Therefore, carbon brushes are the most vulnerable parts in the entire motor.

[0003] To address this, existing technologies employ symmetrical springs on both sides of the carbon brush assembly's end. This reduces the frictional torque on the carbon brush assembly, ensuring overall structural stability and extending its lifespan. However, uneven spring pressure on both sides cannot guarantee the stability of the contact pressure between the carbon brush and the commutator. Furthermore, the carbon brush is relatively short, which can easily lead to wear and sparking, thus still affecting its lifespan. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a floor brush motor with an extended lifespan. It has a reasonable structure and is easy to install and remove. By fixing and snapping the carbon brush assembly and setting an elastic constant pressure component inside the carbon brush holder, it can ensure the stability of the contact pressure between the carbon brush and the commutator, thereby reducing the wear rate and thus increasing the service life.

[0005] To achieve this objective, the technical solution adopted by this utility model is:

[0006] An extended-life floor brush motor includes a housing. Inside the housing are a stator assembly, a rotor assembly passing through the stator assembly, and a front end cover and a rear end cover fixedly mounted at the front and rear ends of the housing, respectively. The rotor assembly includes a shaft, one end of which does not extend beyond the rear end cover, and the other end extending beyond the front end cover. A rotor core and a commutator are located in the middle of the shaft. The stator assembly includes a stator core and stator windings. A terminal assembly is provided on the housing. A carbon brush assembly is snapped onto the rear end cover corresponding to the rotor assembly. The carbon brush assembly includes a carbon brush holder that fits into the rotor assembly. The carbon brush holder has symmetrically arranged carbon brush sleeves extending beyond the outer edge of the rear end cover at both ends. Carbon brushes are located within the carbon brush sleeves. An elastic constant-pressure component is provided between the carbon brushes and the carbon brush sleeves.

[0007] As a further optimization of the above technical solution: the elastic constant pressure component includes a spring piece disposed between the carbon brush sleeve and the carbon brush, the spring piece includes a limiting piece with a bent upper end, an elastic pull piece is provided at the lower part of the spring piece, a guide groove is provided on the inner wall of the carbon brush sleeve, and the spring piece is disposed in the guide groove.

[0008] As a further optimization of the above technical solution: the rear end of the housing is provided with a slot for easy mounting and snapping of the carbon brush holder, and the slot has a square structure.

[0009] As a further optimization of the above technical solution: several heat dissipation holes are evenly opened in the middle of the rear end cover, and two connecting blocks are symmetrically provided on the outer side of the rear end cover to facilitate the detachable connection of the power terminal assembly.

[0010] As a further optimization of the above technical solution: the power terminal assembly is connected to an output wire and an input wire, and the output wire is connected to the carbon brush assembly through a terminal-type power connector.

[0011] As a further optimization of the above technical solution: a first ball bearing is provided in the rear end cover, a second ball bearing is inlaid in the front end cover, and a gear ring is provided at the front end of the rotating shaft.

[0012] Compared with the prior art, this utility model includes a housing, within which is a stator assembly, a rotor assembly passing through the stator assembly, and a front end cover and a rear end cover respectively fixedly installed at the front and rear ends of the housing. The rotor assembly includes a shaft, one end of which does not extend beyond the rear end cover, and the other end extending beyond the front end cover. A rotor core and a commutator are provided in the middle of the shaft. The stator assembly includes a stator core and stator windings, and is provided with a terminal assembly. An extended carbon brush assembly is snapped onto the rear end cover corresponding to the rotor assembly. The carbon brush assembly includes a carbon brush holder that fits into the rotor assembly. The carbon brush holder has carbon brush sleeves symmetrically arranged at both ends extending beyond the outer edge of the rear end cover. A carbon brush is provided inside the carbon brush sleeve. An elastic constant pressure component is provided between the carbon brush and the carbon brush sleeve. By fixing the carbon brush assembly to the rear end cover and providing an elastic constant pressure component inside the carbon brush holder, the structure is reasonable, easy to install and remove, and can ensure the stability of the contact pressure between the carbon brush and the commutator, thereby reducing the wear rate and improving the service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a cross-sectional view of the present invention.

[0015] Figure 3 This is a cross-sectional view of the carbon brush assembly of this utility model. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1-3As shown, an extended-life floor brush motor includes a housing 1. Inside the housing 1 are a stator assembly 2, a rotor assembly 3 passing through the stator assembly 2, and a front end cover 4 and a rear end cover 5 fixedly installed at the front and rear ends of the housing 1, respectively. The rotor assembly 3 includes a shaft 31, one end of which does not extend beyond the rear end cover 5, and the other end extends beyond the front end cover 4. A rotor core 32 and a commutator 33 are located in the middle of the shaft 31. The stator assembly 2 includes a stator core and a stator winding 21. The housing 1 is provided with a terminal assembly. An extended carbon brush assembly 6 is snapped onto the rear end cover 5 corresponding to the rotor assembly 3. The carbon brush assembly 6 includes a carbon brush holder 61 that fits into the rotor assembly 3. The carbon brush holder 61 has symmetrically arranged carbon brush sleeves 62 extending beyond the outer edge of the rear end cover 5 at both ends, effectively lengthening the carbon brush 63 and increasing its service life. The carbon brush 63 is housed within the carbon brush sleeve 62, and an elastic constant pressure component is provided between the carbon brush 63 and the carbon brush sleeve 62. By fixing the carbon brush assembly 6 to the rear end cover 5 and providing the elastic constant pressure component within the carbon brush holder 61, the structure is reasonable, easy to install and remove, and ensures the stability of the contact pressure between the carbon brush 63 and the commutator 33, thereby reducing wear and increasing service life.

[0018] In this embodiment, the elastic constant pressure component includes a spring piece 65 disposed between the carbon brush sleeve 62 and the carbon brush. The spring piece 65 includes a limiting piece 68 bent at the upper end and an elastic pull piece 67 at the lower part of the spring piece 65. A guide groove 66 is formed on the inner wall of the carbon brush sleeve 62, and the spring piece 65 is disposed in the guide groove 66. By the spring piece 65 gradually pulling the carbon brush 63 downward after friction, the carbon brush 63 is always in contact with the commutator 33. The spring piece 65 is disposed in the guide groove 66 and pulls the limiting piece 68 through the elastic pull piece 67, so that the carbon brush slides up and down stably. This can further keep the spring piece 65 constant pressure, thereby ensuring the stability of the contact pressure between the carbon brush 63 and the commutator 33.

[0019] In this embodiment, the rear end of the housing 1 is provided with a slot 51 for easy mounting and snapping of the carbon brush holder 61. The slot 51 has a square structure. By snapping the slot 51 with the carbon brush holder 61, it can effectively maintain stability when the rotor assembly 3 and the commutator 33 generate axial force through rotational friction.

[0020] In this embodiment, a plurality of heat dissipation holes 52 are evenly provided in the middle of the rear end cover 5, and two connecting blocks 53 are symmetrically provided on the outer side of the rear end cover 5 to facilitate the detachable connection of the power terminal assembly. The power terminal assembly is connected to an output wire and an input wire. The output wire is connected to the carbon brush assembly 6 through a terminal-type contact piece. The heat generated by the friction between the carbon brush 63 and the commutator 33 can be effectively dissipated through the heat dissipation holes 52, while the connecting blocks 53 can fix the output wire and the input wire, making them easy to install and remove.

[0021] In this embodiment, the rear end cover 5 is provided with a first ball bearing 34, and the front end cover 4 is provided with a second ball bearing 35. The first ball bearing 34 and the second ball bearing 35 facilitate the rotation between the rotor assembly 3 and the stator winding 21. The front end of the rotating shaft 31 is provided with a gear ring 36 to facilitate the connection between the output end of the rotating shaft 31 and the brush head.

[0022] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should fall within the protection scope of this utility model.

Claims

1. A floor brush motor with extended lifespan, comprising a housing, wherein a stator assembly, a rotor assembly passing through the stator assembly, and a front end cover and a rear end cover respectively fixedly installed at the front and rear ends of the housing, the rotor assembly comprising a shaft, one end of which does not protrude beyond the rear end cover, and the other end of which protrudes beyond the front end cover, and a rotor core and a commutator are disposed in the middle of the shaft; the stator assembly comprises a stator core and stator windings, and the housing is provided with a terminal assembly, characterized in that: A carbon brush assembly is snapped onto the rear end cover corresponding to the rotor assembly. The carbon brush assembly includes a carbon brush holder that fits into the rotor assembly. The carbon brush holder has carbon brush sleeves symmetrically arranged at both ends that extend out of the outer edge of the rear end cover. A carbon brush is provided inside the carbon brush sleeve. An elastic constant pressure component is provided between the carbon brush and the carbon brush sleeve.

2. The extended lifespan floor brush motor according to claim 1, characterized in that: The elastic constant pressure component includes a spring piece disposed between the carbon brush sleeve and the carbon brush. The spring piece includes a limiting piece with a bent upper end and an elastic pull piece at the lower part. A guide groove is provided on the inner wall of the carbon brush sleeve, and the spring piece is disposed in the guide groove.

3. The extended lifespan floor brush motor according to claim 1, characterized in that: The rear end of the housing has a slot for easy mounting and engaging of the carbon brush holder, and the slot has a square structure.

4. The extended lifespan floor brush motor according to claim 1, characterized in that: The rear end cover has several heat dissipation holes evenly distributed in the middle, and two connecting blocks are symmetrically arranged on the outer edge of the rear end cover to facilitate the detachable connection of the power terminal assembly.

5. A floor brush motor with extended lifespan according to claim 4, characterized in that: The terminal assembly is connected to an output wire and an input wire, and the output wire is connected to the carbon brush assembly via a terminal-type terminal piece.

6. A floor brush motor with extended lifespan according to claim 1, characterized in that: The rear end cover is provided with a first ball bearing, the front end cover is provided with a second ball bearing, and the front end of the rotating shaft is provided with a gear ring.

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