CN221009978U - DC motor - Google Patents

Abstract

The utility model discloses a direct current motor, comprising: a housing; the magnetic ring is connected in the shell, round corners are arranged at positions, located at corners, of the outer side of the magnetic ring, round channels penetrating in the upper-lower direction are formed in the inner periphery of the magnetic ring, the outer side wall of the magnetic ring is tightly attached to the inner side wall of the shell, magnetic poles are respectively formed on the four sides of the magnetic ring, and the polarities of two adjacent magnetic poles are opposite; the rotor component passes through the circular channel and is rotationally connected to the shell, the structural design for positioning and mounting the magnetic ring can be reduced, the magnetic ring can be directly positioned by the shell, the shell and the magnetic ring can be designed to be thinner, the integral structural strength can be ensured by utilizing the mutual auxiliary support after the assembly of the shell and the magnetic ring, the assembly efficiency is improved, and the integral volume can be optimized and reduced.

Description

DC motor

Technical Field

The present utility model relates to a motor, and more particularly, to a dc motor.

Background

With the wide application of electronic control in automobiles, more and more automobiles are additionally provided with a waist support and an automobile hidden door handle actuator so as to relieve driving fatigue in the driving process, for example, the existing waist support generally comprises a direct current motor and a corresponding air pump assembly, and the structural design of the direct current motor and the air pump has large volume and large occupied space. The current dc motor adopts a pair of pole magnets and a three-pole iron core, which has a large requirement for the internal space, so that the volume of the dc motor is difficult to be further optimized and reduced, and therefore, a dc motor with more space saving is needed.

Disclosure of utility model

The present utility model is directed to a dc motor that solves one or more of the problems of the prior art, and at least provides a useful choice or creation of conditions.

The utility model solves the technical problems as follows:

A direct current motor comprising: a housing; the magnetic ring is connected in the shell, round corners are arranged at positions, located at corners, of the outer side of the magnetic ring, round channels penetrating in the upper-lower direction are formed in the inner periphery of the magnetic ring, the outer side wall of the magnetic ring is tightly attached to the inner side wall of the shell, magnetic poles are respectively formed on the four sides of the magnetic ring, and the polarities of two adjacent magnetic poles are opposite; a rotor assembly passing through the circular channel and rotatably coupled to the housing.

The technical scheme has at least the following beneficial effects: the magnetic ring is directly provided with a plurality of magnetic poles, a circular channel is formed in the magnetic ring in a surrounding manner, a rounding structure is formed on the outer side of the magnetic ring, the structural strength of the magnetic ring at the corner position of the outer side can be increased, the whole magnetic ring is directly arranged in the shell, the magnetic ring can be rapidly positioned in the shell by utilizing the rounding position on the outer side of the magnetic ring, the outer side wall of the magnetic ring is tightly attached to the inner side wall of the shell, the structural strength of the shell can be enhanced, the shell is prevented from deforming after forming, the rotor assembly is electrified and rotates under the action of the magnetic ring during working, the structural design for positioning and mounting the magnetic ring can be reduced, the magnetic ring can be directly positioned by utilizing the shell, the shell and the magnetic ring can be designed thinner, the integral structural strength can be ensured by utilizing the mutual auxiliary support after the assembly of the shell and the magnetic ring, the assembly efficiency is improved, and the integral volume can be optimized and reduced.

As a further improvement of the technical scheme, a carbon brush group is arranged in the shell and comprises a fixed box, a spring and carbon brush ends, the fixed box is connected in the shell, the spring is connected in the fixed box, one end of each carbon brush end abuts against the spring, the spring has a trend of pushing the carbon brush ends towards the rotor assembly, and the number of the carbon brush groups is two. The carbon brush end in the carbon brush group is horizontal design, occupation along axial space in the shell can be reduced, the spring provides acting force close to the rotor assembly for the carbon brush end is more stable in angle after friction, forward and backward rotation speed output is stable, and running stability and service life of the direct current motor are improved.

As a further improvement of the technical scheme, the shell comprises a shell body and an end cover, a cavity with a downward opening is formed in the inner periphery of the shell body, the end cover is connected to the bottom end of the shell body, the outer side wall of the magnetic ring is tightly attached to the inner wall of the cavity, the rotor assembly is located in the cavity, the rotor assembly penetrates out of the top side of the shell body upwards, a first circuit board is connected to the top side of the end cover, and the fixing box is connected to the first circuit board. When the motor is assembled, the magnetic ring is firstly arranged in the cavity formed by the shell, the inner side wall of the shell is supported, the structural stability of the shell and the magnetic ring is enhanced, then the rotor assembly is arranged in a circular channel formed by surrounding the magnetic ring, the rotor assembly is provided with an output part protruding upwards from the top side of the shell, the first circuit board for controlling the whole direct current motor is connected to the end cover, and when the end cover is connected to the shell, the first circuit board is surrounded and protected.

As a further improvement of the above technical solution, a connection terminal is connected to the top side of the end cover, the connection terminal passes through the first circuit board upwards, and the top of the connection terminal is welded on the first circuit board. When the first circuit board is installed into the end cover, the connecting terminal on the top side of the end cover is matched with a preset hole position on the first circuit board, so that the first circuit board and the end cover are rapidly positioned, then the part of the top of the connecting terminal protruding out of the first circuit board is welded on the first circuit board, the mutual electric connection of the first circuit board and the connecting terminal can be realized, the first circuit board can be further fixed, and the integral assembly efficiency is improved.

As a further improvement of the technical scheme, the rear side of the end cover is connected with a rear cover, a second circuit board is connected in the rear cover, and an anti-interference device is connected on the second circuit board. When the electromagnetic compatibility of the motor needs to be met, the rear cover can be directly arranged on the rear side of the end cover, the second circuit board is arranged in the rear cover, and the anti-interference device is arranged on the second circuit board, so that the service performance of the direct current motor is enhanced.

As a further improvement of the above technical solution, the present utility model further includes a fixed terminal, two ends of the fixed terminal are respectively clamped in the rear cover and the end cover, and the fixed terminal is electrically connected with the first circuit board and the second circuit board. The fixed terminal can be used for connecting the end cover and the rear cover with each other, the rear cover is better fixed on the rear side of the end cover relatively, and the first circuit board and the second circuit board can be electrically connected with each other, so that the fixed terminal is utilized to play a role in reinforcing fixation and electricity connection ingeniously.

As a further improvement of the above technical solution, at least two conductive terminals are connected to the outer side of the rear cover, and all the conductive terminals are electrically connected to the second circuit board respectively. When a user assembles the direct-current motor, the peripheral structure is tightly attached to the rear cover for installation and connection, and the two conductive terminals are used for electrifying, so that the assembly efficiency can be improved, and the installation space can be better saved.

As a further improvement of the above technical solution, the rear cover is connected to the rear side of the end cover by a snap. The rear cover can be quickly installed and fixed on the rear side of the end cover through buckle connection, so that the assembly efficiency and stability of the rear cover are improved.

As a further improvement of the technical scheme, the rotor assembly comprises an output shaft, a rotor core and a commutator, wherein the rotor core and the commutator are respectively sleeved on the outer side of the output shaft, the rotor core is stacked and arranged along the axial direction of the output shaft, coating layers are respectively arranged on the outer side of the rotor core and the outer side of the rotor core, and the output shaft is rotationally connected to the shell. The rotor iron core and the output shaft are integrated by coating, the installation is more convenient, the relative positioning structure of the rotor iron core and the output shaft is reduced, and when the commutator is used, current is connected in, so that the rotor iron core forms a magnetic field, and the output shaft rotates under the interaction of the magnetic rings to output driving force outwards.

As a further improvement of the above technical solution, a plurality of the rotor cores are arranged along the output shaft and formed with a plurality of wire winding grooves, each of which extends in the axial direction of the output shaft. The plurality of rotor cores are arranged to form a whole rotor core, and a plurality of winding grooves extending in a straight line are formed in the rotor core, so that the winding efficiency can be improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the utility model, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.

Fig. 1 is a schematic view of the structure of the housing, end cap, magnetic ring, rotor assembly, end cap and rear cap of the present utility model separated from each other.

Fig. 2 is a perspective view of an end cap of the present utility model.

Fig. 3 is a perspective view of the rear cover of the present utility model.

Fig. 4 is a schematic overall assembly of the present utility model.

Fig. 5 is a schematic view of the magnetizing yoke of the present utility model.

In the accompanying drawings: the magnetic field generator comprises a 1-magnetic ring, a 11-magnetizing yoke, a 12-copper wire, a 21-fixed box, a 22-spring, a 23-carbon brush end, a 31-shell, a 32-end cover, a 321-first circuit board, a 322-connecting terminal, a 4-rear cover, a 41-second circuit board, a 42-conducting terminal, a 5-fixed terminal, a 61-output shaft, a 62-rotor core and a 63-commutator.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to a connection structure that may be better formed by adding or subtracting connection aids depending on the particular implementation. The technical features in the utility model can be interactively combined on the premise of no contradiction and conflict.

Referring to fig. 1 and 4, a direct current motor includes: a housing; the magnetic ring 1 is connected in the shell, round corners are arranged at positions, located at corners, of the outer side of the magnetic ring 1, round channels penetrating in the up-down direction are formed in the inner periphery of the magnetic ring 1, the outer side wall of the magnetic ring 1 is tightly attached to the inner side wall of the shell, magnetic poles are respectively formed on four sides of the magnetic ring 1, and the polarities of two adjacent magnetic poles are opposite; a rotor assembly passing through the circular channel and rotatably coupled to the housing.

In the direct current motor, a plurality of magnetic poles are directly formed on the magnetic ring 1, a circular channel is formed in the magnetic ring 1 in a surrounding manner, a rounding structure is formed on the outer side of the magnetic ring 1, the structural strength of the magnetic ring 1 at the outer side corner position can be increased, the whole magnetic ring 1 can be directly arranged in a shell, the magnetic ring 1 can be quickly positioned in the shell by using the rounding position on the outer side of the magnetic ring 1, the outer side wall of the magnetic ring 1 is tightly attached to the inner side wall of the shell, the structural strength of the shell can be enhanced, the shell is prevented from deforming after being formed, and when the direct current motor works, a rotor assembly is electrified and rotates under the action of the magnetic ring 1, so that the structural design for positioning and mounting the magnetic ring 1 can be reduced, the magnetic ring 1 can be directly positioned by using the shell, the shell and the magnetic ring 1 can be designed to be thinner, the whole structural strength can be ensured by using the mutual auxiliary support after the assembly of the shell and the magnetic ring is assembled, the assembly efficiency is improved, and the whole volume can be optimally reduced.

Of course, a structure for powering on the rotor assembly is configured in the housing, as shown in fig. 2, in this embodiment, a carbon brush set is provided in the housing, the carbon brush set includes a fixed box 21, a spring 22 and a carbon brush end 23, the fixed box 21 is connected in the housing, the spring 22 is connected in the fixed box 21, one end of the carbon brush end 23 abuts against the spring 22, the spring 22 has a tendency of pushing the carbon brush end 23 toward the rotor assembly, the carbon brush set has two carbon brush sets, the two carbon brush sets can be in a 90-degree design, and an overcurrent protector is installed on one side of the two carbon brush sets to prevent the dc motor from burning out due to long-time locked rotation. An external power source is connected to the carbon brush end 23 to be transferred to the commutator 63 in the rotor assembly, so that the rotor assembly generates a rotating magnetic field. The carbon brush end 23 in the carbon brush group is of a horizontal design, occupation of axial space in the shell can be reduced, acting force close to the rotor assembly is provided for the carbon brush end 23 by the spring 22, so that the angle of the carbon brush end 23 after friction is more stable, the output of positive and negative rotation speed is stable, and the running stability and the service life of the direct current motor are improved.

In practical application, a plurality of steps can be arranged in the shell, when the iron core is arranged in the shell, the stroke of the iron core is limited by the plurality of steps, and when the magnetic ring 1 is arranged in the iron core, the magnetic ring 1 and the inner side wall of the shell can be further attached and fixed by using glue.

The shell is mainly used for surrounding and protecting the magnetic ring 1 and the rotor assembly, and is internally provided with a main electric appliance control element, in the embodiment, the shell comprises a shell 31 and an end cover 32, a cavity with a downward opening is formed in the inner periphery of the shell 31, the end cover 32 is connected to the bottom end of the shell 31, the outer side wall of the magnetic ring 1 is tightly attached to the inner wall of the cavity, the rotor assembly is positioned in the cavity, the rotor assembly upwards penetrates out of the top side of the shell 31, the top side of the end cover 32 is connected with a first circuit board 321, and the fixing box 21 is connected to the first circuit board 321. During assembly, the magnetic ring 1 is firstly arranged in a cavity formed by the shell 31, the inner side wall of the shell 31 is supported, the structural stability of the shell 31 and the magnetic ring 1 is enhanced, then the rotor assembly is arranged in a circular channel formed by surrounding the magnetic ring 1, the rotor assembly is provided with an output part protruding upwards from the top side of the shell 31, the first circuit board 321 for controlling the whole direct current motor is connected to the end cover 32, and when the end cover 32 is connected to the shell 31, the first circuit board 321 is surrounded and protected.

In order to facilitate assembly of the first circuit board 321, in this embodiment, a connection terminal 322 is connected to a top side of the end cap 32, the connection terminal 322 passes upward through the first circuit board 321, and a top of the connection terminal 322 is soldered to the first circuit board 321. When the first circuit board 321 is installed in the end cover 32, the connecting terminal 322 on the top side of the end cover 32 is matched with a preset hole site on the first circuit board 321, so that the first circuit board 321 and the end cover 32 are rapidly positioned, then the part of the top of the connecting terminal 322 protruding out of the first circuit board 321 is welded on the first circuit board 321, so that the two parts can be electrically connected with each other, the first circuit board 321 can be further fixed, and the overall assembly efficiency is improved. Carbon brush braids on the carbon brush ends 23 are welded on the first circuit board 321, welding points of the carbon brush braids and welding points of fixed positions are in a serial connection state, and the carbon brush ends 23 are kept smooth in electrifying.

For some dc motors with higher performance requirements, as shown in fig. 3, the rear side of the end cover 32 is connected with a rear cover 4, a second circuit board 41 is connected in the rear cover 4, and an anti-interference device is connected on the second circuit board 41. When the electromagnetic compatibility of the motor needs to be satisfied, the rear cover 4 can be directly installed at the rear side of the end cover 32, the second circuit board 41 is installed in the rear cover 4, and the anti-interference device is installed on the second circuit board 41, so that the service performance of the direct current motor is enhanced.

The utility model further comprises a fixed terminal 5, two ends of the fixed terminal 5 are respectively clamped in the rear cover 4 and the end cover 32, and the fixed terminal 5 is electrically connected with the first circuit board 321 and the second circuit board 41. The fixing terminal 5 can be used for connecting the end cover 32 and the rear cover 4 with each other, so that the rear cover 4 is better fixed on the rear side of the end cover 32, and the first circuit board 321 and the second circuit board 41 can be electrically connected with each other, so that the fixing terminal 5 is utilized to skillfully play a role in strengthening fixing and electric connection.

In order to facilitate the energizing of the dc motor, in this embodiment, at least two conductive terminals 42 are connected to the outer side of the rear cover 4, and all the conductive terminals 42 are electrically connected to the second circuit board 41, respectively. When a user assembles the direct-current motor, the peripheral structure is tightly attached to the rear cover 4 for installation and connection, and the two conductive terminals 42 are used for electrifying, so that the assembly efficiency can be improved, and the installation space can be better saved.

The magnetic ring 1 is formed with a plurality of magnetic poles and has various structural forms, for example, the magnetic ring 1 comprises four different magnets, connecting blocks are respectively connected between the four magnets, and an integral annular structure is integrally formed, in the embodiment, the magnetic ring 1 is directly of an integral structure, then the magnetic ring is magnetized, when the magnetic ring is magnetized, as shown in fig. 5, a magnetizing yoke 11 is placed into the magnetic ring 1, the magnetizing yoke 11 is filled with four groups of copper wires 12, the four groups of copper wires 12 are respectively electrified with positive and negative currents, magnetic fields are generated after the copper wires 12 are electrified, and the magnetic fields magnetize the magnetic ring 1 to enable the four sides of the magnetic ring 1 to represent magnetism due to different current directions and different magnetic field directions.

In addition to the connection of the rear cover 4 to the end cap 32 by means of the fixed terminals 5, in the present embodiment, the rear cover 4 is connected to the rear side of the end cap 32 by means of a snap-fit connection. The rear cover 4 can be quickly installed and fixed on the rear side of the end cover 32 through snap connection, so that the assembly efficiency and stability of the rear cover 4 are improved.

The rotor assembly comprises an output shaft 61, a rotor core 62 and a commutator 63, the rotor core 62 and the commutator 63 are respectively sleeved on the outer side of the output shaft 61, the rotor core 62 is stacked and arranged in a plurality along the axial direction of the output shaft 61, coating layers are respectively arranged on the outer side of the rotor core 62 and the outer side of the rotor core 62, the output shaft 61 is rotationally connected to the shell, and in practical application, the output shaft 61 is rotationally connected to the top side of the shell 31 and the end cover 32 through bearings. The rotor core 62 and the output shaft 61 are integrated by coating, so that the installation is more convenient, the relative positioning structure of the rotor core 62 and the output shaft 61 is reduced, and when the magnetic ring is used, current is connected from the commutator 63, so that the rotor core 62 forms a magnetic field, and the output shaft 61 rotates under the interaction of the magnetic ring 1 to output driving force outwards.

Further, a plurality of the rotor cores 62 are arranged along the output shaft 61 and formed with a plurality of winding grooves, each extending in the axial direction of the output shaft 61. The plurality of rotor cores 62 are arranged to form a complete rotor core, and a plurality of winding grooves extending in a straight line are formed in the rotor core, thereby improving winding efficiency. If a six-slot four-pole direct current brushed motor scheme is adopted, the rotor core 62 has six teeth, and six winding slots are formed at the moment.

While the preferred embodiment of the present utility model has been described in detail, the utility model is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the utility model, and these modifications and substitutions are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims (10)

1. A direct current motor, characterized in that: comprising the following steps:

A housing;

the magnetic ring (1) is connected in the shell, round corners are arranged at positions, located at corners, of the outer side of the magnetic ring (1), round channels penetrating in the vertical direction are formed in the inner periphery of the magnetic ring (1), the outer side wall of the magnetic ring (1) is tightly attached to the inner side wall of the shell, magnetic poles are respectively formed on the four sides of the magnetic ring (1), and the polarities of two adjacent magnetic poles are opposite;

a rotor assembly passing through the circular channel and rotatably coupled to the housing.

2. A dc motor as set forth in claim 1, wherein: be provided with carbon brush group in the shell, carbon brush group includes fixed box (21), spring (22) and carbon brush end (23), fixed box (21) connect in the shell, spring (22) connect in fixed box (21), carbon brush end (23) one end offset in spring (22), spring (22) have will carbon brush end (23) top to rotor subassembly's trend, carbon brush group has two.

3. A dc motor as set forth in claim 2, wherein: the shell comprises a shell body (31) and an end cover (32), a cavity with a downward opening is formed in the inner periphery of the shell body (31), the end cover (32) is connected to the bottom end of the shell body (31), the outer side wall of the magnetic ring (1) is tightly attached to the inner wall of the cavity, the rotor assembly is located in the cavity, the rotor assembly upwards penetrates out of the top side of the shell body (31), a first circuit board (321) is connected to the top side of the end cover (32), and the fixing box (21) is connected to the first circuit board (321).

4. A direct current motor according to claim 3, characterized in that: the top side of the end cover (32) is connected with a connecting terminal (322), the connecting terminal (322) upwards penetrates through the first circuit board (321), and the top of the connecting terminal (322) is welded on the first circuit board (321).

5. A direct current motor according to claim 3, characterized in that: the rear side of the end cover (32) is connected with a rear cover (4), a second circuit board (41) is connected in the rear cover (4), and an anti-interference device is connected to the second circuit board (41).

6. A dc motor as set forth in claim 5, wherein: the circuit board also comprises a fixed terminal (5), wherein two ends of the fixed terminal (5) are respectively clamped in the rear cover (4) and the end cover (32), and the fixed terminal (5) is electrically connected with the first circuit board (321) and the second circuit board (41).

7. A dc motor as set forth in claim 6, wherein: the outside of back lid (4) is connected with two at least conductive terminal (42), all conductive terminal (42) are respectively electrically connected in second circuit board (41).

8. A dc motor as set forth in claim 5, wherein: the rear cover (4) is connected to the rear side of the end cover (32) through a buckle.

9. A dc motor as set forth in claim 1, wherein: the rotor assembly comprises an output shaft (61), a rotor core (62) and a commutator (63), wherein the rotor core (62) and the commutator (63) are respectively sleeved on the outer side of the output shaft (61), the rotor core (62) is arranged in a plurality of stacked mode along the axial direction of the output shaft (61), coating layers are respectively arranged on the outer side of the rotor core (62) and the outer side of the rotor core (62), and the output shaft (61) is rotationally connected to the shell.

10. A dc motor as set forth in claim 9, wherein: a plurality of rotor cores (62) are arranged along the output shaft (61) and are formed with a plurality of wire-wound grooves, and the plurality of wire-wound grooves extend in the axial direction of the output shaft (61).