KR200454917Y1 - Electric motor with cable integral brush cartridge assembly - Google Patents

Abstract

The present invention relates to an electric motor having a cable-integrated brush cartridge assembly. The electric motor of the present invention includes a yoke assembly in which a permanent magnet is disposed inside the yoke, a rotating shaft around which the armature coil is wound, and disposed inside the yoke assembly, a commutator pressed into the rotating shaft, and feeding the armature coil. An electric motor including a brush, a brush holder accommodating the brush and assembled in the cartridge housing, and a brush cartridge housing in which the brush holder is installed, the cable being connected to an electrode plate 90 for supplying current to the brush. ) Is embedded in the brush cartridge housing 100 in one piece by insert injection molding; The cable 60 is embedded in the brush cartridge housing 100 together with a covering part in a state where the bare copper wire 61 portion of one end is joined to the electrode plate 90, and a power supply part is provided at the other end of the cable 60. Connector 65 for connecting to the configuration is provided. The present invention reduces the number of parts by fixing the cable to the brush cartridge housing as a single unit, and is simple to assemble, while the foreign matter from the outside is not concerned because the covering of the cable is integrally embedded in the brush cartridge housing.

Motor, brush, housing, cable, electrode plate, monolith

Description

ELECTRIC MOTOR HAVING THE BRUSH CARTRIDGE ASSEMBLY COMBINED WITH CABLES FOR ONE PIECE}

The present invention relates to a brush-type electric motor, and more particularly to an electric motor having a cable-integrated brush cartridge assembly consisting of a single unit of the brush cartridge housing is provided with a cable and a brush for supplying current to the brush.

As shown in FIGS. 1 and 2, the brush-type permanent magnet motor includes a yoke assembly 10 having a permanent magnet 12 disposed inside the yoke 11 and a core of the rotating shaft 21. An armature coil (not shown) is wound around the armature 22 and an armature assembly 20 in which a commutator 24 is press-fitted at its distal end. After arranging the voids inside the permanent magnets 12 of the assembly 10 and applying a current to the armature coils, an electromagnetic force is generated between the armature coils and the permanent magnets 12 and the armature assembly is controlled by Fleming's left hand law. 20 rotates to gain power.

In addition, a brush cartridge assembly 30 for supplying power to the armature coil is provided. The brush cartridge assembly 30 includes a brush 41 in sliding contact with the outer circumference of the commutator 24, a brush holder 42 in which the brush 41 is accommodated, and a brush cartridge housing in which the brush holder 42 is installed. 50 and a cable 60 for feeding the brush 41. The brush cartridge assembly 30 is secured to the yoke 11 by the front cover 70.

Here, one end of the cable 60 is provided with a connector 65 for connecting to a power supply, the opposite end passes through a rubber grommet 80 to the electrode inside the brush cartridge housing 50. Are bonded to the plate. The grommet 80 serves to prevent intrusion of dust or foreign matter into the brush cartridge housing 50.

As shown in FIGS. 3 and 4, the brush 41 is received in the brush holder 42 and connected to the electrode plate 90 by an electric wire 43.

Here, in the conventional brush cartridge assembly 30, in order to connect the cable 60, the electrode plate 90 is embedded in the cartridge housing 50 by insert injection. The cable 60 passes through the through hole 81 of the grommet 80, unites the grommet 80 and the cable 60, and passes the grommet 80 to the opening 51 for coupling the brush cartridge housing 50. Plug in. The electrode plate exposing the bare copper wire 61 portion from which the cover of the cable 60 that has passed through the through hole 81 of the grommet 80 is removed to the outside of the cartridge housing 50 (FIGS. 3 and 3). 4, a complicated assembly process of welding (soldering or the like) the bare copper wire 61 to the electrode plate 90 had to be performed.

That is, the electrode plate 90 is integrated with the brush cartridge housing 50 by insert injection, the grommet 80 and the cable 60 are assembled, and the grommet 80 is assembled into the cartridge housing 50 again. The cable 60 has to go through a complicated assembly process that requires welding, and the number of parts also increases, which inevitably increases manufacturing costs.

In addition, since the cable 60 passes through the grommet 80 made of rubber, the welding part of the bare wire 61 and the electrode connector 90 breaks frequently when the cable 60 is subjected to a load to be pulled. There are some disadvantages that occur and degrade the reliability of the product.

On the other hand, Republic of Korea Utility Model Registration No. 20-0432036, the connector (corresponding to the grommet portion in Figures 1 to 4) integrally molded on one side of the cover of the motor (corresponding to the brush cartridge housing of the present specification) The motor which integrally molded the terminal connected to the electrode plate in the inside of the said connector is disclosed.

However, such a motor is provided with a connector (corresponding to reference numeral '65' in FIGS. 1 to 3) of one end of the cable and connected to the connector and the terminal of the cartridge housing on the opposite end of the cable. Another connector (connector corresponding to the reference numeral '65' in Figs. 1 to 3) is further provided for connection, and the manufacturing process and the number of parts of the motor are also complicated, and the motor is installed even when used in a vehicle At the same time as the installation of the cable is not completed the installation of the cable is not completed is not solved. In particular, in the motor disclosed in the above publication, it is difficult to seal a portion where the connector of the housing and the connector of the cable are coupled, which causes a high number of foreign matters such as dust or moisture to penetrate into the cartridge housing, causing frequent failures.

The present invention is to solve the above problems, the cable and grommet for supplying current to the brush is composed of a single unit with the brush cartridge housing, simplifying the structure, reducing the number of parts and simplifying the assembly process, It is an object of the present invention to provide an electric motor with improved product stability.

The object of the present invention described above is a yoke assembly in which a permanent magnet is disposed inside the yoke, a rotating shaft around which the armature coil is wound and disposed inside the yoke assembly, a commutator press-fitted to the rotating shaft, and a power feeding to the armature coil. An electric motor comprising a brush for storing, a brush holder accommodating the brush and assembled in the cartridge housing, and a brush cartridge housing in which the brush holder is installed, the cable being connected to an electrode plate for supplying current to the brush. Embedded in the brush cartridge housing in one piece by insert injection molding; The cable is embedded in the brush cartridge housing together with the covering in a state where the bare copper wire portion of one end is joined to the electrode plate, and the other end of the cable is provided with a connector for connecting to the power supply. By providing.

Here, one side of the brush cartridge housing is preferably formed so that the cable support protrusion is formed in a single body, the cover portion of the cable is embedded in the cable support protrusion.

In addition, it is preferable that the bare wire portion of the cable is completely buried in the brush cartridge housing without being exposed to the outside.

In the electric motor according to the present invention, the grommet is molded into a single body in the brush cartridge housing as well as the cable is fixed in a single body.

Therefore, the number of parts can be greatly reduced, and there is the convenience of assembling the cable simply by assembling the brush cartridge housing without a separate welding or assembling process.

In addition, since the cable is integrally embedded in the brush cartridge housing, there is no fear of foreign matter penetrating from the outside.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 to 7 show a brush cartridge assembly according to the present invention, FIG. 5 is a perspective view of FIGS. 5 and 6, and FIG. 7 is a cross-sectional view taken along the centerline of the cable of FIG. 5. Is shown. The same parts as in Figs. 1 to 4 will be described with the same reference numerals.

As shown in FIGS. 5 to 7, the brush cartridge assembly according to the present invention is integrally embedded in the brush cartridge housing 100 while the cable 60 is welded to the electrode plate 90. .

The cable 60 has a portion of the bare copper wire 61 at one end thereof is joined to the electrode plate 90 by soldering, brazing, or spot welding, and the coating portion is made of a plastic brush cartridge housing 100. Is buried in. The other end of the cable 60 is provided with a connector 65 for connecting to the power supply.

As shown in FIG. 7, the bare wire 61 of the cable 60 may be embedded in a state in which a part (upper part) is exposed from the brush cartridge housing 100, and is completely buried without an exposed part. It can be configured as.

In order to maintain stable protection of the cable 60 and to prevent ingress of external foreign matter through the covering, the cable support protrusion 110 is radially outwardly of the brush cartridge housing 100 to one side of the brush cartridge housing 100. It protrudes, and the covering part of the cable 60 is embedded in the cable support protrusion 110. The support protrusion 100 may be configured in a form similar to the appearance of the conventional grommet 80 (see FIGS. 1 to 4).

When the covering portion 62 of the cable 60 is embedded in the brush cartridge housing 100, no gap is generated between the cable 60 and the brush cartridge housing 100 so that the sealing is perfected so that external foreign matters are removed. There is no fear of penetration into the brush cartridge housing 100.

The brush cartridge assembly according to the present invention is insert-molded into the brush cartridge housing 100 so that the cable 60 is embedded to the cover portion 62 of the cable 60 while the cable 60 is bonded to the electrode plate 90. .

Thus, the conventional grommet 80 (see FIGS. 1-4) is removed and the cable 60 is monolithically fixed to the brush cartridge housing 100 from the beginning so that the brush cartridge housing 100 and the cable 60 are always It is handled, managed and assembled as a part.

In other words, in the manufacturing process of the electric motor, simply assembling the brush cartridge housing 100 in which the cable 60 is integrally attached to the yoke and the cover of the electric motor, assembly of the motor is simply completed. After assembly, simply insert the connector of the power supply side into the connector 65 provided at the other end of the cable 60, the installation is made simple.

8 and 9 show the manufacturing process of the brush cartridge assembly of the present invention.

As shown in FIG. 8, the bare copper wire 61 portion of the cable 60 is placed on the upper surface of the electrode plate 90, and the periphery of the bare copper wire 61 is welded to the electrode plate 90 by welding.

The electrode plate 90 with the cable 60 attached thereto is inserted into an injection mold having a cavity shaped like a brush cartridge housing 100. The injection mold is provided with a cavity portion corresponding to the cable support protrusion 110 in advance.

Subsequently, when the molten raw material resin is injected into the mold to be solidified, as shown in the right side of FIG. 8, the brush cartridge housing 100 having the cable support protrusion 110 formed on one side is formed, and the cable 60 is formed. A buried and fixed brush cartridge assembly is completed.

Since the cable 60 is embedded in the brush cartridge housing 100 up to the covering portion 62, the portion embedded in the brush cartridge housing 100 is not pulled out at all even when the cable 60 is pulled outside. There is no fear that the welding between 61 and the electrode plate 90 is broken or damaged.

Next, the brush cartridge housing 100, ie, the brush cartridge housing 100 in which the electrode plate 90 and the cable 60 are integrally embedded, is assembled to the cover 70, and then the cover 70 is assembled. The assembly is completed simply by fastening to the yoke 11 (refer FIG. 1 and FIG. 2).

As described above, the electric motor according to the present invention, as the grommet is formed in a single unit of the brush cartridge housing, as well as the cable is fixed as a single unit, the number of parts is reduced, as long as the assembly of the brush cartridge housing, there is no separate welding or assembly process The cable is simply assembled.

In addition, since the covering 62 of the cable is integrally embedded in the brush cartridge housing, there is no fear that foreign matter may penetrate from the outside.

Therefore, when the present invention is applied, the cost of the electric motor is reduced and the electric motor having excellent stability and quality of the product is realized.

In the above described specific embodiments of the present invention shown in the accompanying drawings in detail, but this is only an example of a preferred form of the present invention, the scope of protection of the present invention is not limited thereto. In addition, the embodiments of the present invention as described above can be variously modified and equivalent other embodiments by those of ordinary skill in the art within the technical spirit of the present invention, such modifications and equivalent other embodiments are present It belongs to the attached utility model registration claim of the invention.

1 is a cross-sectional view showing an example of a conventional electric motor.

FIG. 2 is a perspective view showing the appearance of FIG. 1. FIG.

3 is an exploded perspective view illustrating a connection structure between an inner terminal and a cable of a conventional brush cartridge assembly.

4 is a perspective view illustrating a connection state between a cable and an inner terminal of the brush cartridge assembly of FIG. 3.

5 is a perspective view showing the structure of a brush cartridge assembly according to the present invention.

FIG. 6 is a view seen from the bottom of FIG. 5.

FIG. 7 is a cross-sectional view taken along the centerline of the cable of FIG. 5.

8 is a perspective view illustrating a process of connecting an inner terminal and a cable of the brush cartridge assembly of FIG. 5.

9 is a perspective view showing the final assembly state of the brush cartridge assembly and the cover according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: yoke assembly 11: yoke

12: permanent magnet 21: rotation axis

22: core 24: commutator

30 brush cartridge assembly 41 brush

42: brush holder 60: cable

61: bare wire 65: connector

70: cover 80: grommet

90 electrode plate 100 brush cartridge housing

110: cable support protrusion

Claims (3)

A yoke assembly having a permanent magnet disposed inside the yoke, a rotating shaft wound with an armature coil disposed inside the yoke assembly, a commutator pressed into the rotating shaft, a brush for feeding the armature coil, and a brush An electric motor comprising a brush holder accommodated in a cartridge housing and a brush cartridge housing in which a brush holder is installed, While the cable 60 is connected to the electrode plate 90 for supplying current to the brush, it is embedded in a single body by insert injection molding in the brush cartridge housing 100. The cable 60 is embedded in the brush cartridge housing 100 together with the covering portion 62 in a state where a bare copper wire 61 portion of one end is joined to the electrode plate 90, and the other end of the cable 60. The electric motor, characterized in that the connector is provided for connecting to the power supply. The method of claim 1, One side of the brush cartridge housing 100 is a cable support protrusion 110 is formed in a single body, the covering portion 62 of the cable 60 is embedded in the cable support protrusion 110, characterized in that Electric motor. The method of claim 1, The bare wire (61) portion of the cable (60) is an electric motor, characterized in that the whole is buried in the brush cartridge housing (100) without a portion exposed to the outside.

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