Direct current motor with carbon deposition cleaning function

Abstract

The utility model discloses a direct current motor with a carbon deposition cleaning function, relates to the technical field of direct current motors, and aims to solve the problems that the motor runs abnormally and the performance of the motor is influenced due to carbon powder deposition generated by friction between a carbon brush and a commutator in the prior art. The periphery of the commutator is connected with a carbon brush, one end of the commutator is sleeved with a limiting meson, the commutator and the limiting meson are matched with each other to enable carbon powder to be discharged through a notch of the commutator, and one side of the limiting meson is connected with a bearing. The limiting meson with the outer diameter smaller than or equal to the groove depth is installed on one side of the commutator, so that the carbon powder can be smoothly discharged through the flow groove, and accumulation of the carbon powder on the commutator is reduced.

Description

Technical Field

[0001] This utility model relates to the field of DC motor technology, and in particular to a DC motor with a carbon cleaning function. Background Art

[0002] In conventional DC motors, one or more limiting bushings need to be fitted onto the commutator end of the motor rotor. This is to control the shaft extension size of the DC motor and to prevent carbon powder buildup caused by friction between the carbon brushes and the commutator during operation, which could lead to malfunctions, affect motor performance, cause electrical disconnection between commutator poles, and result in loss of commutation function. This can lead to performance failure of the DC motor, preventing it from rotating and thus shortening its service life. Utility Model Content

[0003] This invention proposes a DC motor with a carbon-cleaning function, which solves the existing problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a DC motor with a carbon cleaning function, comprising a motor rotor and a housing, wherein a commutator is connected to one side of the motor rotor, carbon brushes are connected to the outer periphery of the commutator, and a limiting insert is fitted into one end of the commutator, wherein the outer diameter of the limiting insert is less than or equal to the outer diameter of the slot of the commutator, the commutator and the limiting insert cooperate to allow carbon powder to be discharged through the slot of the commutator, a bearing is connected to one side of the limiting insert, and the outer diameter of the other side of the limiting insert is greater than the outer diameter of the bearing.

[0005] Preferably, there are two limiting elements, and the two limiting elements have different outer diameters. The outer diameter of the limiting element with smaller outer diameter is less than or equal to the outer diameter of the commutator, and the outer diameter of the limiting element with larger outer diameter is greater than the outer diameter of the bearing.

[0006] Preferably, the two limiting elements are integrated stepped elements, with the smaller outer diameter end of the stepped element facing the commutator and the larger outer diameter end in contact with the bearing.

[0007] Preferably, the commutator has multiple flow channels at equal intervals on its outer periphery, which are used to allow toner to flow.

[0008] Preferably, one end of the carbon brush is in contact with the commutator, the other end of the carbon brush is connected to a brush holder, and the brush holder is connected to one side of the rear cover. The carbon brush forms carbon powder through rotational friction with the commutator.

[0009] Preferably, the housing and the back cover are interlocked, the housing has a second ventilation opening on both sides at one end, and the back cover has a first ventilation opening on both sides inside.

[0010] The beneficial effects of this invention are as follows: By changing the size and insertion order of the limiting media, the device installs a limiting medial with a diameter less than or equal to the outer diameter of its slot depth on one side of the commutator, allowing the toner to be smoothly discharged through the flow channel. A limiting medial with a relatively large outer diameter is inserted on the side near the bearing to facilitate the discharge of toner. When the motor is running, the centrifugal force generated will push the toner to move and be discharged through the second ventilation port and the first ventilation port, effectively reducing the accumulation of toner on the commutator, preventing electrical conduction between the commutator poles, thereby reducing the possibility of motor performance failure and extending the overall service life of the motor. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a structural breakdown diagram of the present invention.

[0013] Figure 3 This is a schematic diagram of the commutator of this utility model.

[0014] Figure 4 This is a schematic diagram of the casing of this utility model.

[0015] The following are the labels in the diagram: 1. Motor rotor; 2. Commutator; 201. Flow channel; 3. Carbon brush; 301. Brush holder; 4. Bearing; 5. Limiting device; 6. Rear cover; 601. First vent; 7. Housing; 701. Second vent. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Reference Figures 1-4 A DC motor with carbon deposit cleaning function includes a motor rotor 1 and a housing 7. A commutator 2 is connected to one side of the motor rotor 1. A carbon brush 3 is connected to the outer periphery of the commutator 2. A limiting element 5 is fitted into one end of the commutator 2. The outer diameter of the limiting element 5 is less than or equal to the outer diameter of the slot of the commutator 2. The commutator 2 and the limiting element 5 cooperate to allow carbon powder to be discharged through the slot of the commutator 2. A bearing 4 is connected to one side of the limiting element 5. The outer diameter of the other side of the limiting element 5 is greater than the outer diameter of the bearing 4.

[0018] Reference Figure 2Two limiting mediators 5 are provided, and the two limiting mediators 5 have different outer diameters. The outer diameter of the smaller limiting mediator 5 is less than or equal to the outer diameter of the commutator 2, and the outer diameter of the larger limiting mediator 5 is greater than the outer diameter of the bearing 4. The two limiting mediators 5 can be designed as an integrated stepped mediator. The smaller outer diameter end of the stepped mediator is connected to the commutator 2, and the larger outer diameter end is in contact with the bearing 4. By inserting one or more limiting mediators 5 with relatively smaller outer diameters on one side of the commutator 2, the toner can be smoothly discharged through the slot. Subsequently, a limiting mediator 5 with a larger outer diameter than the bearing 4 is inserted to facilitate the discharge of toner.

[0019] refer to Figure 3 The commutator 2 has multiple flow channels 201 evenly spaced on its outer periphery. The flow channels 201 are used to allow toner to flow. One end of the carbon brush 3 is in contact with the commutator 2, and the other end of the carbon brush 3 is connected to a brush holder 301. The brush holder 301 is connected to one side of the rear cover 6. The carbon brush 3 generates toner by rotating and rubbing against the commutator 2. During motor operation, the toner generated by the friction between the carbon brush 3 and the commutator 2 enters the gap formed by the flow channels 201 of the commutator 2 and the limiting medium 5.

[0020] refer to Figure 4 The housing 7 and the rear cover 6 are interlocked. The housing 7 has a second ventilation port 701 on both sides at one end, and the rear cover 6 has a first ventilation port 601 on both sides inside. As the motor runs, the centrifugal force will push the toner further towards the first ventilation port 601 of the motor rear cover 6 and the second ventilation port 701 of the housing 7, and finally discharge it, reducing the accumulation of toner on the commutator 2.

[0021] Working principle: First, during the process of fitting the limiting insert 5 into the motor rotor 1, one or more limiting inserts 5 with relatively small outer diameters are fitted in. Their outer diameters must be less than or equal to the outer diameter of the slot depth of the commutator 2 to ensure that the carbon powder can be discharged smoothly through the slot opening. Then, one or more limiting inserts 5 with relatively large outer diameters are fitted in. Their outer diameters must be greater than the outer diameter of the bearing 4 to facilitate the discharge of carbon powder. In order to further optimize the carbon discharge effect, the two limiting inserts 5 can be processed into separate stepped inserts. The stepped end with the relatively small outer diameter is installed facing the commutator 2 end of the motor rotor 1. In this way, when the carbon brush 3 rubs against the commutator 2 to generate carbon powder, the carbon powder can pass through the flow groove 201 of the commutator 2 into the gap created after the limiting inserts 5 are combined. As the motor runs, the centrifugal force generated will push the carbon powder further towards the first ventilation port 601 of the motor rear cover 6 and the second ventilation port 701 of the housing 7, and finally discharge it. This reduces the accumulation of carbon powder, prevents electrical conduction between the poles of the commutator 2, and thus reduces the possibility of motor performance failure.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A DC motor with a carbon-cleaning function, comprising a motor rotor (1) and a housing (7), characterized in that, A commutator (2) is connected to one side of the motor rotor (1). A carbon brush (3) is connected to the outer periphery of the commutator (2). A limiting insert (5) is fitted into one end of the commutator (2). The outer diameter of the limiting insert (5) is less than or equal to the outer diameter of the slot of the commutator (2). The commutator (2) and the limiting insert (5) cooperate to allow carbon powder to be discharged through the slot of the commutator (2). A bearing (4) is connected to one side of the limiting insert (5). The outer diameter of the other side of the limiting insert (5) is greater than the outer diameter of the bearing (4).

2. The DC motor with carbon-cleaning function according to claim 1, characterized in that, There are two limiting elements (5), and the two limiting elements (5) have different outer diameters. The outer diameter of the smaller limiting element (5) is less than or equal to the outer diameter of the commutator (2), and the outer diameter of the larger limiting element (5) is greater than the outer diameter of the bearing (4).

3. The DC motor with carbon-cleaning function according to claim 2, characterized in that, The two limiting mesons (5) are integrated stepped mesons, with the smaller outer diameter end of the stepped mesons connected to the commutator (2) and the larger outer diameter end in contact with the bearing (4).

4. The DC motor with carbon-cleaning function according to claim 1, characterized in that, The commutator (2) has multiple flow channels (201) evenly spaced on its outer periphery, which are used to allow toner to flow.

5. The DC motor with carbon-cleaning function according to claim 1, characterized in that, One end of the carbon brush (3) is in contact with the commutator (2), and the other end of the carbon brush (3) is connected to a brush holder (301). The brush holder (301) is connected to one side of the rear cover (6). The carbon brush (3) forms carbon powder by rotating and rubbing against the commutator (2).

6. The DC motor with carbon-cleaning function according to claim 1, characterized in that, The housing (7) and the rear cover (6) are interlocked. The housing (7) has a second ventilation opening (701) on both sides at one end, and the rear cover (6) has a first ventilation opening (601) on both sides inside.

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