Brush direct current motor

Abstract

The utility model provides a brush direct current motor, and belongs to the technical field of motors. The problem that in the prior art, a carbon brush support is not stable enough in fixation is solved. A front end cover and a rear end cover are respectively fixed at two ends of the motor shell; an armature is fixed in the motor shell in a penetrating manner; a series copper winding is fixed on the outer side of the middle part of the armature; a driver shell is fixed on the outer side of the series copper winding; a first fixing column and a second fixing column are arranged on the rear end cover, a first carbon brush support and a second carbon brush support are fixed to the first fixing column and the second fixing column respectively, and the first fixing column and the second fixing column are fixedly connected with the side face of the first carbon brush support and the side face of the second carbon brush support respectively. A first carbon brush and a second carbon brush are fixedly arranged in the first carbon brush support and the second carbon brush support respectively. The motor has the advantages that the carbon brush support is fixed stably, and the heat dissipation efficiency of the motor is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors and relates to a brushed DC motor. Background Art

[0002] A brushed DC motor is a DC motor with fixed main magnetic poles and brushes installed on the stator and armature windings and commutators installed on the rotor. The electric energy of the DC power supply enters the armature winding through the brushes and commutator, generating armature current. The magnetic field generated by the armature current interacts with the main magnetic field to generate electromagnetic torque, causing the motor to rotate and drive the load.

[0003] A Chinese patent with publication number CN206452229U discloses a brushed DC motor, comprising a motor housing and a stator component and a rotor component arranged in the motor housing. The two ends of the motor housing are fixedly connected to left and right end covers. The left end cover is provided with a left bearing positioning hole, in which a left bearing is installed. The right end cover is provided with a right bearing positioning hole, in which a right bearing is installed. The rotor component comprises a rotor shaft and a commutator fixed on the rotor shaft. The left shaft end of the rotor shaft is slewably supported by a left bearing, and the right shaft end of the rotor shaft is slewably supported by a right bearing. The right end of the rotor shaft is slewably supported by a right bearing. The right end face of the outer ring of the right bearing is axially limited by a step of the right bearing positioning hole, and the left end face of the inner ring of the right bearing is axially limited by a shaft retaining ring arranged on the rotor shaft. A conical spring is arranged between the left bearing and the commutator. The small head end of the conical spring abuts against the right end face of the inner ring of the left bearing, and the large head end abuts against the bottom end face of the commutator. The left end face of the outer ring of the left bearing is limited by the step of the left bearing positioning hole.

[0004] In the brushed DC motor provided by this patent, the fixing method of the commutator and carbon brushes is not firm enough, and there is a risk of falling off during use. Utility Model Content

[0005] The purpose of the utility model is to provide a brushed DC motor in view of the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a brushed DC motor, comprising a motor housing, a front end cover and a rear end cover are respectively fixed at both ends of the motor housing, an armature is fixed inside the motor housing, a series copper winding is fixed on the outer side of the middle part of the armature, a driver housing is fixed on the outer side of the series copper winding, a commutator ring is fixed at one end of the armature, a first fixing column and a second fixing column are provided on the rear end cover, a first carbon brush holder and a second carbon brush holder are respectively fixed on the first fixing column and the second fixing column, the first fixing column and the second fixing column are respectively fixedly connected to the side surfaces of the first carbon brush holder and the second carbon brush holder, a first carbon brush and a second carbon brush are respectively fixedly provided inside the first carbon brush holder and the second carbon brush holder, the first carbon brush and the second carbon brush are respectively extended out of the first carbon brush holder and the second carbon brush holder and close to the two sides of the commutator ring.

[0007] In the above-mentioned brushed DC motor, a through hole is opened in the front end cover, the armature extends out of the front end cover through the through hole, and a fan is fixedly mounted on the armature near the front end cover.

[0008] In the above-mentioned brushed DC motor, the armature is connected to the inner wall of the rear end cover, and an anchoring washer is fixed at the connection between the armature and the inner wall of the rear end cover.

[0009] In the above-mentioned brushed DC motor, a first copper bracket and a second copper bracket are respectively fixed to the armatures on both sides of the series copper winding.

[0010] In the above-mentioned brushed DC motor, a first heat dissipation hole is formed on the motor housing, and a second heat dissipation hole is formed on the rear end cover.

[0011] Compared with the prior art, the brushed DC motor provided by the utility model has the following beneficial effects: 1. By arranging the first fixing column and the second fixing column on the rear end cover, the first carbon brush bracket and the second carbon brush bracket are fixed on the first fixing column and the second fixing column respectively, so that the first carbon brush bracket and the second carbon brush bracket are fixed more firmly, and the problem of contact and friction between the first carbon brush and the second carbon brush and the commutator ring caused by the looseness of the first carbon brush bracket and the second carbon brush bracket is reduced, thereby improving the service life of the utility model; 2. By arranging an anchoring washer at the connection between the rear end cover and the armature, the pressure when the armature is connected to the rear end cover is reduced; 3. By opening a first heat dissipation hole on the motor housing and a second heat dissipation hole on the rear end cover, the heat dissipation performance of the utility model is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the utility model after the motor housing is removed.

[0015] In the figure: 1. motor housing; 11. first heat dissipation hole; 2. front end cover; 21. through hole; 3. rear end cover; 31. first fixing column; 32. second fixing column; 33. anchoring washer; 34. second heat dissipation hole; 4. armature; 41. first copper bracket; 42. second copper bracket; 5. series copper winding; 6. driver housing; 7. commutator ring; 8. first carbon brush bracket; 81. first carbon brush; 9. second carbon brush bracket; 91. second carbon brush; 10. fan. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] like Figures 1 to 3 As shown, this embodiment includes a motor housing 1, with a front end cover 2 and a rear end cover 3 fixed at both ends of the motor housing 1 respectively, a through hole 21 is opened at the center of the front end cover 3, an armature 4 is passed through and fixed inside the motor housing 1, the armature 4 extends out of the front end cover 2 through the through hole 21, a fan 10 is fixedly mounted on the armature 4 near the front end cover 2, a series copper winding 5 is fixed on the outer side of the middle part of the armature 4, a driver housing 6 is fixed on the outer side of the series copper winding 5, and a first copper bracket 41 and a second copper bracket 42 are respectively fixed to the armature 4 on both sides of the series copper winding 5.

[0018] like Figures 2 to 3 As shown, a commutator ring 7 is fixed to one end of the armature 4 near the rear end cover 3, and a first fixing column 31 and a second fixing column 32 are arranged on the rear end cover 3 at positions on both sides of the commutator ring 7 horizontally, and the first carbon brush bracket 8 and the second carbon brush bracket 9 are respectively fixedly connected to the first fixing column 31 and the second fixing column 32, and the first carbon brush bracket 8 and the second carbon brush bracket 9 are completely identical and rectangular, and the first fixing column 31 and the second fixing column 32 are respectively connected and fixed to the side surfaces of the first carbon brush bracket 8 and the second carbon brush bracket 9, and have high stability when in use, and the first carbon brush bracket 8 and the second carbon brush bracket 9 are close to each other. The commutator ring 7 is open on both sides and hollow inside. The first carbon brush 81 and the second carbon brush 91 are fixedly arranged inside the first carbon brush bracket 8 and the second carbon brush bracket 9 respectively, and the first carbon brush 81 and the second carbon brush 91 extend out of the first carbon brush bracket 8 and the second carbon brush bracket 9 respectively and are close to the two sides of the commutator ring 7. Since the first carbon brush bracket 8 and the second carbon brush bracket 9 are firmly connected to the first fixing column 31 and the second fixing column 32, the first carbon brush 81 and the second carbon brush 91 will not contact the commutator ring 7 during use, which effectively improves the service life of the first carbon brush 81 and the second carbon brush 91.

[0019] To elaborate further, Figures 2 to 3 As shown, the armature 4 is connected to the inner wall of the rear end cover 3, and an anchoring washer 33 is fixed at the connection between the armature 4 and the inner wall of the rear end cover 3. The anchoring washer 33 can reduce the pressure on the armature 4 when connected to the rear end cover 3.

[0020] To elaborate further, Figures 1 to 3 As shown, a first heat dissipation hole 11 is opened on the motor housing 1, and the first heat dissipation hole 11 is located above the fan 10. A second heat dissipation hole 34 is opened on the rear end cover 3, and the second heat dissipation hole 34 and the fan 10 are located in the same horizontal direction. The fan 10 can effectively dissipate heat through the first heat dissipation hole 11 and the second heat dissipation hole 34.

[0021] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0022] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A brushed DC motor, comprising a motor housing (1), a front end cover (2) and a rear end cover (3) being fixed to both ends of the motor housing (1), an armature (4) being fixedly arranged inside the motor housing (1), a series copper winding (5) being fixedly arranged on the outer side of the middle part of the armature (4), a driver housing (6) being fixedly arranged on the outer side of the series copper winding (5), and a commutator ring (7) being fixedly arranged on one end of the armature (4), characterized in that: The rear end cover (3) is provided with a first fixing column (31) and a second fixing column (32), and a first carbon brush holder (8) and a second carbon brush holder (9) are fixed to the first fixing column (31) and the second fixing column (32) respectively, and the first fixing column (31) and the second fixing column (32) are respectively fixedly connected to the side surfaces of the first carbon brush holder (8) and the second carbon brush holder (9), and a first carbon brush (81) and a second carbon brush (91) are respectively fixedly arranged inside the first carbon brush holder (8) and the second carbon brush holder (9), and the first carbon brush (81) and the second carbon brush (91) extend out of the first carbon brush holder (8) and the second carbon brush holder (9) respectively and are close to two sides of the commutator ring (7).

2. A brushed DC motor according to claim 1, characterized in that: A through hole (21) is provided in the front end cover (2), and the armature (4) extends out of the front end cover (2) through the through hole (21). A fan (10) is sleeved and fixed on the armature (4) near the front end cover (2).

3. A brushed DC motor according to claim 1, characterized in that: The armature (4) is connected to the inner wall of the rear end cover (3), and an anchoring washer (33) is fixed at the connection between the armature (4) and the inner wall of the rear end cover (3).

4. A brushed DC motor according to claim 1, characterized in that: A first copper bracket (41) and a second copper bracket (42) are respectively fixed to the armatures (4) on both sides of the series copper winding (5).

5. A brushed DC motor according to claim 1, characterized in that: The motor housing (1) is provided with a first heat dissipation hole (11), and the rear end cover (3) is provided with a second heat dissipation hole (34).

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