reduction motor

Abstract

The utility model discloses a kind of reduction motor, including gear box and DC brush motor, the gear box is connected with DC brush motor, the DC brush motor includes shell and front cover and back cover connected on shell, the front cover is equipped with protective piece, the back cover is equipped with carbon brush, the protective piece adsorbs grease flowing from gear box to DC brush motor and adsorbs carbon powder in DC brush motor. The utility model prolongs service life by protective piece adsorbing oil mist and carbon powder generated in the work of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a geared motor. Background Technology

[0002] Geared motors are used in industrial automation, mechanical equipment, and other fields. Conventional motors generally consist of a gearbox and a DC brushed motor.

[0003] During long-term use, carbon brushes in DC brushed motors generate carbon dust due to friction between the commutator and the carbon brushes. Over time, this carbon dust accumulates in the commutator slots, affecting the motor's lifespan. Furthermore, in high-temperature environments, grease inside the gearbox can leak into the DC brushed motor as oil mist. If this oil mist enters between the carbon brushes and the commutator, it will contaminate the carbon brushes, leading to electrical isolation, excessive commutation sparking, or even motor stalling, further shortening the motor's lifespan. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the technical problem of toner and oil mist pollution in the prior art, this utility model provides a geared motor that uses a protective component to adsorb the oil mist and toner generated by the motor during operation, thereby extending its service life.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a geared motor, including a gearbox and a DC brushed motor, wherein the gearbox is connected to the DC brushed motor, the DC brushed motor includes a housing and a front cover and a rear cover connected to the housing, a protective component is provided inside the front cover, and a carbon brush is provided inside the rear cover, the protective component adsorbs grease flowing from the gearbox to the DC brushed motor and adsorbs carbon powder inside the DC brushed motor.

[0006] This utility model of a DC brushed motor can absorb oil mist entering from the front cover, preventing oil mist from contaminating the commutator. At the same time, the protective component can effectively absorb carbon powder splashed from the friction between the commutator and the carbon brush, preventing carbon powder from accumulating inside the commutator, avoiding carbon powder and oil mist contamination, and extending the service life of the DC brushed motor.

[0007] Furthermore, to ensure a tight fit between the protective component and the front cover, the protective component includes: A bottom plane facing the direction of the carbon brush, the bottom plane having an inner hole through which the motor shaft passes; A boss facing the front cover, which engages with a groove in the front cover.

[0008] Furthermore, to prevent grease leakage, the bottom plane is press-fitted into the front cover by its own elasticity.

[0009] Furthermore, in order to press the elastic element into the front cover, the outer diameter of the bottom plane is slightly larger than the inner diameter of the front cover.

[0010] Furthermore, in order to prevent the rotor from rubbing against the protective component and increasing motor losses, there is a gap between the inner hole and the windings on the motor shaft.

[0011] Furthermore, to facilitate the assembly of the rotor's bearings, the diameter of the inner bore is larger than the diameter of the front cover bearing chamber.

[0012] Furthermore, in order to achieve the fitting of the front cover and the protective component, multiple bosses are arranged at intervals along the center circle of the protective component, and grooves are formed between adjacent bosses.

[0013] Furthermore, the front cover has protruding ribs that mate with the groove and recesses that mate with the boss.

[0014] Furthermore, in order to select a protective component with better adsorption effect, the protective component is oil-absorbing cotton or felt.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. The present invention relates to a geared motor, wherein a protective component is provided inside the front cover. The protective component absorbs oil mist entering the front cover from the gearbox, preventing oil mist from contaminating the commutator. At the same time, the protective component that absorbs oil mist can also absorb carbon powder generated by the carbon brushes during operation due to friction, preventing carbon powder from accumulating in the insulation groove of the commutator. It also serves to absorb grease and carbon powder, effectively extending the service life of the motor.

[0016] 2. In this utility model of a geared motor, the protective component and the front cover are formed by an interference fit using a boss and groove structure. The elasticity of the protective component itself allows it to fit tightly against the front cover, which can prevent grease leakage. At the same time, the inner hole size of the protective component is reasonably set to avoid friction interference between the protective component and the rotor due to grease adsorption, which would increase motor wear. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a cross-sectional view of the geared motor of this utility model; Figure 2 This is an exploded view of a DC brushed motor. Figure 3 This is a three-dimensional structural diagram of the protective component; Figure 4 This is a schematic diagram of the three-dimensional structure of the front cover; Figure 5 This is a 3D view of a DC brushed motor and gearbox.

[0019] In the diagram: 1. DC brushed motor, 11. Housing, 12. Front cover, 13. Rear cover, 14. Carbon brush, 15. Motor shaft, 16. Commutator, 17. Protective component, 171. Bottom plane, 172. Boss, 173. Inner hole, 2. Gearbox. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and 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, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 and Figure 5 As shown, a geared motor includes a DC brushed motor 1 and a gearbox 2, with the gearbox 2 connected to the DC brushed motor 1.

[0024] like Figure 2As shown, specifically, the DC brushed motor 1 includes a housing 11 and a front cover 12 and a rear cover 13 connected to the housing 11. Carbon brushes 14 are housed inside the rear cover 13. A motor shaft 15 is located inside the housing 11, with its front end extending out of the front cover 12 and connected to the gearbox 2. A commutator 16 is located at the rear end of the motor shaft 15. A protective element 17 is provided inside the front cover 12. The protective element 17 absorbs grease entering the front cover 12 and also absorbs carbon powder flowing from the carbon brushes 14 to the front cover 12.

[0025] When the geared motor operates at an ambient temperature >50 degrees Celsius, the grease in the gearbox 2 will enter the housing 11 in the form of oil mist through the motor shaft 15. Therefore, a protective component 17 is installed inside the front cover 12. When the oil mist enters the front cover 12, the protective component 17 will absorb the oil mist, preventing it from accumulating and forming a watery grease that flows onto the commutator 16, thus preventing the commutator 16 from being contaminated by grease and avoiding electrical isolation that could cause large commutation sparks or motor stalling. During operation, the carbon brushes 14 and commutator 16 generate carbon powder through friction. If this carbon powder is not treated, it will accumulate in the slots of the commutator 16. The protective component 17 absorbs both grease and carbon powder (and the protective component 17 has a better absorption effect on carbon powder after grease absorption), preventing carbon powder accumulation in the slots of the commutator 16 and further extending the service life of the DC brushed motor 1. Other components of the DC brushed motor 1 are not related to the concept of this invention and will not be described further here.

[0026] Example 2, based on Example 1, such as Figure 3 and Figure 4 As shown, the protective component 17 includes a bottom plane 171 facing the carbon brush 14 and a boss 172 facing the front cover 12. The bottom plane 171 has an inner hole 173 through which the motor shaft 15 passes. The boss 172 is engaged with a groove in the front cover 12. The protective component 17 and the front cover 12 can be quickly positioned and assembled through the boss 172 and the groove, and the connection is stable.

[0027] Preferably, multiple bosses 172 are arranged at intervals along the center circle of the protective member 17, and a groove is formed between adjacent bosses 172. The front cover 12 has ribs that mate with the grooves and grooves that mate with the bosses 172. In this embodiment, the number of bosses 172 is 4.

[0028] Specifically, the outer diameter of the bottom plane 171 is slightly larger than the inner diameter of the front cover 12, so that the bottom plane 171 and the front cover 12 are interference-fitted. The bottom plane 171 is pressed into the front cover 12 by its own elasticity, ensuring that the protective part 17 is tightly assembled with the front cover 12 and preventing the protective part 17 from falling off.

[0029] Preferably, the diameter of the inner bore 173 is larger than the diameter of the bearing chamber of the front cover 12, so that the bearing on the rotor can pass through and is easy to assemble. There is a gap between the inner bore 173 and the winding on the motor shaft 15, so that the bearing can avoid the highest point of the rotor winding coil and prevent the rotor from rubbing against the protective part 17 after rotation, thus increasing motor losses.

[0030] In Example 3, based on Example 2, the protective component 17 is made of oil-absorbing cotton or felt. Oil-absorbing cotton or felt has a low cost and good absorption effect.

[0031] In summary, the geared motor of this invention extends its service life by using a protective component to absorb oil mist and carbon powder generated during operation.

[0032] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A geared motor, comprising a gearbox (2) and a DC brushed motor (1), wherein the gearbox (2) is connected to the DC brushed motor (1), characterized in that, The DC brushed motor (1) includes a housing (11) and a front cover (12) and a rear cover (13) connected to the housing (11). The front cover (12) is provided with a protective component (17), and the rear cover (13) is provided with a carbon brush (14). The protective component (17) adsorbs grease flowing from the gearbox (2) to the DC brushed motor (1) and adsorbs carbon powder inside the DC brushed motor (1).

2. The geared motor according to claim 1, characterized in that, The protective component (17) includes: A bottom plane (171) facing the direction of the carbon brush (14) has an inner hole (173) through which the motor shaft (15) passes. A boss (172) facing the front cover (12) is connected to the groove of the front cover (12).

3. The geared motor according to claim 2, characterized in that, The bottom plane (171) is press-fitted with the front cover (12) and is pressed into the front cover (12) by its own elasticity.

4. The geared motor according to claim 3, characterized in that, The outer diameter of the bottom plane (171) is slightly larger than the inner diameter of the front cover (12).

5. The geared motor according to claim 2, characterized in that, There is a gap between the inner hole (173) and the winding on the motor shaft (15).

6. The geared motor according to claim 5, characterized in that, The diameter of the inner hole (173) is larger than the diameter of the bearing chamber of the front cover (12).

7. The geared motor according to claim 2, characterized in that, Multiple bosses (172) are arranged at intervals along the center circle of the protective member (17), and a groove is formed between adjacent bosses (172).

8. The geared motor according to claim 7, characterized in that, The front cover (12) has a rib that mates with the groove and a groove that mates with the boss (172).

9. The geared motor according to any one of claims 1-8, characterized in that, The protective component (17) is oil-absorbing cotton or felt.

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