Direct current motor

Abstract

The utility model discloses a direct current motor, which relates to the technical field of motors and comprises a motor shell, an isolation block is fixedly mounted in the motor shell, a rotating shaft is rotatably arranged in the motor shell and penetrates through the motor shell and the isolation block, and a driving assembly is arranged in the isolation block and used for driving the rotating shaft to rotate. A rear end cover is fixedly arranged at the rear end of the motor shell, rear through grooves are formed in the rear end cover at equal intervals, a front through groove is formed in the front end of the motor shell, a front end cover is fixedly connected to the front end of the motor shell, and the rotating shaft extends out of the motor shell and the front end cover. A fan is fixedly installed on the part, close to the front end cover, of the rotating shaft. Ventilation grooves are formed in the part, corresponding to the fan, of the motor shell at equal intervals. The problems that in the prior art, no heat dissipation structure is arranged in a driving assembly, heat dissipation is caused when the driving assembly drives a motor to operate, and continuous heat dissipation affects the working efficiency of the motor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a DC motor. Background Art

[0002] DC motors are widely used in electric vehicles, robots, home appliances and other fields. During operation, DC motors are prone to heating due to current loss, friction loss, ambient temperature and other factors, which affects the operating efficiency of the device.

[0003] The Chinese utility model with publication number CN217642942U proposes a DC motor: including a motor housing, a motor rotating shaft and a drive assembly; the drive assembly includes a rotor member and two oppositely arranged magnetic substrates, the rotor member is sleeved on the motor rotating shaft, the two magnetic substrates both pass through the motor rotating shaft, the two magnetic substrates are both connected to the inner side wall of the motor housing, the rotor member is located between the two magnetic substrates, and the inner side wall of the motor housing is installed with brushes that cooperate with the rotor member.

[0004] However, the prior art still has the following problems:

[0005] The above solution improves the efficiency of converting electrical energy into kinetic energy by placing the rotor component between a pair of magnetic substrates instead of constantly changing the direction of the coil or intermittently energizing the coil, thereby reducing the efficiency of coil heating. However, during the operation of the motor, the back electromotive force generated by the rotor component cutting the magnetic lines of force will affect the current, and part of the energy will be converted into heat and lost. In the magnetic substrate, the change in the magnetic field will cause hysteresis loss and eddy current loss, which will also be converted into heat energy. The higher the temperature, the higher the loss rate, thereby reducing the working efficiency of the motor. Therefore, it is necessary to further improve the heat dissipation effect of the motor. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a DC motor that solves the problem in the prior art that the drive assembly does not have a heat dissipation structure, and the drive assembly dissipates heat when driving the motor, and continuous heat dissipation affects the motor's operating efficiency.

[0007] To achieve the above-mentioned object, the present invention provides a DC motor, comprising a motor housing, an isolation block fixedly mounted in the motor housing, a rotating shaft rotatably disposed in the motor housing, the rotating shaft passing through the motor housing and the isolation block, and a drive assembly disposed in the isolation block for driving the rotation of the rotating shaft;

[0008] A rear end cover is fixedly provided at the rear end of the motor housing, rear through slots are equidistantly provided on the rear end cover, a front through slot is provided at the front end of the motor housing, a front end cover is fixedly connected to the front end of the motor housing, the rotating shaft extends out of the motor housing and the front end cover, a fan is fixedly installed on the portion of the rotating shaft close to the front end cover, and ventilation slots are equidistantly provided on the portion of the motor housing corresponding to the fan.

[0009] As a further solution of the present invention: the drive assembly includes a rotor part, a magnetic substrate, and an arc-shaped brush; the rotor part is fixedly mounted on the rotating shaft, and the magnetic substrates are symmetrically arranged on both sides of the rotor part, and the rotating shaft passes through the magnetic substrate and does not contact the magnetic substrate; the two ends of the magnetic substrate are fixedly connected to the isolation block, and the arc-shaped brushes are symmetrically arranged on both sides of the rotor part, and the arc-shaped brushes are fixedly connected to the isolation block.

[0010] As a further solution of the present invention: one end of the rotating shaft is rotatably connected to the rear end cover, a bearing is fixedly installed on the rear end cover, the rotating shaft is fixedly connected to the inner ring of the bearing, and the rear end cover is fixedly connected to the outer ring of the bearing.

[0011] As a further solution of the present invention: a bearing is provided at the front end of the motor housing, and is rotatably connected to the rotating shaft through the bearing.

[0012] As a further solution of the present invention: clamping blocks are symmetrically arranged at both ends of the isolation block, a pair of limit blocks are fixedly arranged in the motor housing, and a clamping slot matching the clamping block is opened on the limit block. The isolation block and the motor housing are fixedly connected by the clamping block and the limit block.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. By arranging a fan on the rotating shaft, opening a rear slot on the rear end cover, and opening a ventilation slot corresponding to the fan on the motor housing, when the motor is powered on to drive the rotating shaft to rotate, it can drive the fan to rotate, and accelerate the air circulation inside and outside the motor housing through the rear slot and the ventilation slot, thereby achieving heat dissipation of the drive components in the isolation block.

[0015] 2. By arranging the drive assembly in the isolation block, the isolation block and the motor housing are detachably connected through the clamping block and the limit block, which facilitates the installation and disassembly of the isolation block, thereby facilitating the installation and maintenance of the drive assembly arranged in the isolation block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model after removing the front end cover;

[0018] Figure 3 For this utility model Figure 2 sectional view of .

[0019] In the figure: 1. Motor housing; 2. Rear end cover; 3. Front end cover; 4. Ventilation slot; 5. Rotating shaft; 6. Rear through slot; 7. Rotor component; 8. Magnetic substrate; 9. Arc brush; 10. Block; 11. Limit block; 12. Isolation block; 13. Front through slot; 14. Fan; 15. Bearing. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1-3 As shown, a DC motor includes a motor housing 1, an isolation block 12 is fixedly installed in the motor housing 1, a rotating shaft 5 is rotatably arranged in the motor housing 1, the rotating shaft 5 passes through the motor housing 1 and the isolation block 12, and a driving assembly is arranged in the isolation block 12. The driving assembly is arranged on the rotating shaft 5 for driving the rotation of the rotating shaft 5;

[0022] As an implementation method in this embodiment, a rear end cover 2 is fixedly provided at the rear end of the motor housing 1, and rear through slots 6 are equidistantly opened on the rear end cover 2. One end of the rotating shaft 5 is rotatably connected to the rear end cover 2, and a bearing 15 is fixedly installed on the rear end cover 2. The rotating shaft 5 is fixedly connected to the inner ring of the bearing 15, and the rear end cover 2 is fixedly connected to the outer ring of the bearing 15. A bearing 15 is provided at the front end of the motor housing 1, which is rotatably connected to the rotating shaft 5 through the bearing 15. A front through slot 13 is opened at the front end of the motor housing 1, and a front cover 3 is fixedly connected to the front end of the motor housing 1. The rotating shaft 5 extends out of the motor housing 1 and the front cover 3 for connecting to an external transmission structure. A rubber pad is provided at the rotatably connected portion of the front cover 3 and the rotating shaft 5 to enhance the isolation between the front cover 3 and the external transmission structure.

[0023] As one implementation method of this embodiment, a fan 14 is fixedly mounted on the portion of the rotating shaft 5 near the front end cover 3, and ventilation slots 4 are equidistantly formed on the portion of the motor housing 1 corresponding to the fan 14. When the drive assembly drives the rotating shaft 5 to rotate, the fan 14 is driven to rotate, accelerating the air circulation inside and outside the motor housing 1 through the rear through slot 6 and the ventilation slot 4, thereby achieving heat dissipation for the drive assembly within the isolation block 12.

[0024] As one implementation method of this embodiment, the drive assembly includes a rotor component 7, a magnetic substrate 8, and an arc-shaped brush 9; the rotor component 7 is fixedly mounted on the rotating shaft 5, and the magnetic substrates 8 are symmetrically arranged on both sides of the rotor component 7. The rotating shaft 5 passes through the magnetic substrates 8 and does not contact the magnetic substrates 8; the two ends of the magnetic substrates 8 are fixedly connected to the isolation blocks 12, and the arc-shaped brushes 9 are symmetrically arranged on both sides of the rotor component 7. The arc-shaped brushes 9 are fixedly connected to the isolation blocks 12. After the staff energizes the DC motor, a current loop is formed between the rotor component 7 and the arc-shaped brush 9 to generate a magnetic field, and a stable magnetic field is generated between the two oppositely arranged magnetic substrates 8. The rotor component 7 rotates under the action of the electromagnetic force, thereby driving the rotating shaft 5 to rotate, thereby driving the external transmission structure to rotate;

[0025] As an implementation method in this embodiment, the isolation block 12 is symmetrically provided with a clamping block 10 at both ends, and a pair of limit blocks 11 are fixedly provided in the motor housing 1. The limit blocks 11 are provided with a slot matching the clamping block 10. The isolation block 12 is fixedly connected to the motor housing 1 by the clamping connection between the clamping block 10 and the limit block 11, which facilitates the installation and disassembly of the isolation block 12.

[0026] Working principle:

[0027] After the staff energizes the DC motor, a current loop is formed between the rotor part 7 and the arc-shaped brush 9 to generate a magnetic field, and a stable magnetic field is generated between the two oppositely arranged magnetic substrates 8. The rotor part 7 rotates under the action of electromagnetic force, thereby driving the rotating shaft 5 to rotate, thereby driving the external transmission structure to rotate; when the rotating shaft 5 rotates, it can drive the fan 14 to rotate, accelerating the air circulation inside and outside the motor housing 1 through the rear slot 6 and the ventilation slot 4, thereby achieving heat dissipation of the drive components in the isolation block 12.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent application of the present invention.

Claims

1. A DC motor, characterized in that: The motor comprises a motor housing (1), an isolation block (12) is fixedly mounted in the motor housing (1), a rotating shaft (5) is rotatably arranged in the motor housing (1), the rotating shaft (5) passes through the motor housing (1) and the isolation block (12), and a driving assembly is arranged in the isolation block (12) for driving the rotation of the rotating shaft (5); A rear end cover (2) is fixedly provided at the rear end of the motor housing (1), rear through slots (6) are equidistantly provided on the rear end cover (2), a front through slot (13) is provided at the front end of the motor housing (1), a front end cover (3) is fixedly connected to the front end of the motor housing (1), the rotating shaft (5) extends out of the motor housing (1) and the front end cover (3), a fan (14) is fixedly installed on a portion of the rotating shaft (5) close to the front end cover (3), and ventilation slots (4) are equidistantly provided on a portion of the motor housing (1) corresponding to the fan (14).

2. A DC motor according to claim 1, characterized in that: The driving assembly comprises a rotor component (7), a magnetic substrate (8), and an arc-shaped brush (9); the rotor component (7) is fixedly mounted on the rotating shaft (5); the magnetic substrates (8) are symmetrically arranged on both sides of the rotor component (7); the rotating shaft (5) passes through the magnetic substrate (8) and does not contact the magnetic substrate (8); both ends of the magnetic substrate (8) are fixedly connected to the isolation block (12); the arc-shaped brush (9) is symmetrically arranged on both sides of the rotor component (7), and the arc-shaped brush (9) is fixedly connected to the isolation block (12).

3. A DC motor according to claim 1, characterized in that: One end of the rotating shaft (5) is rotatably connected to the rear end cover (2), a bearing (15) is fixedly mounted on the rear end cover (2), the rotating shaft (5) is fixedly connected to the inner ring of the bearing (15), and the rear end cover (2) is fixedly connected to the outer ring of the bearing (15).

4. A DC motor according to claim 3, characterized in that: A bearing (15) is provided at the front end of the motor housing (1) and is rotationally connected to the rotating shaft (5) via the bearing (15).

5. A DC motor according to claim 1, characterized in that: Clamping blocks (10) are symmetrically arranged at both ends of the isolation block (12); a pair of limiting blocks (11) are fixedly arranged in the motor housing (1); and a clamping slot matching the clamping block (10) is provided on the limiting block (11). The isolation block (12) and the motor housing (1) are fixedly connected by the clamping block (10) and the limiting block (11).

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