KR20130071256A

KR20130071256A - Motor of electrical parking brake

Info

Publication number: KR20130071256A
Application number: KR1020110138658A
Authority: KR
Inventors: 유상협; 박인욱
Original assignee: 현대모비스 주식회사
Priority date: 2011-12-20
Filing date: 2011-12-20
Publication date: 2013-06-28

Abstract

An invention relating to a motor for an electronic parking brake is disclosed. The motor of the disclosed electronic parking brake includes a hollow motor case; A stator spaced apart from each other and fixed to the inner wall of the motor case; A rotor inserted into the motor case so as to be spaced apart from the stator, and rotating according to the application of power; A drive shaft coupled to the center of the rotor and rotated by the rotational force of the rotor; And an actuator body to which the motor case is coupled such that the drive shaft is rotatably penetrated. Characterized in that it comprises a.

Description

Motor of electronic parking brake {MOTOR OF ELECTRICAL PARKING BRAKE}

The present invention relates to a motor of an electronic parking brake, and more particularly, to a motor of an electronic parking brake that can increase the thickness of a stator by increasing the thickness of a stator by integrally forming a motor in an actuator body of the electronic parking brake. It is about.

In general, an electric parking brake (EPB) generates a parking braking force by pressurizing a caliper by converting a power of a motor through a button operation into a linear reciprocating motion through an actuator.

On the other hand, Korean Patent Application No. 2010-0128597 (application date: December 15, 2010) discloses an "electronic parking brake actuator".

According to the electronic parking brake, the motor which is rotated forward or reverse according to the driving signal is inserted and fixed in the motor mounting hole formed in the actuator body in a state surrounded by the motor case.

At this time, the case of the motor itself and the motor case coupled to the actuator body in order to protect the motor is overlapping inefficient.

In addition, since the size of the motor is limited by the motor case, the performance of the motor is limited.

Therefore, there is a need to improve this.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

The present invention has been made by the necessity as described above, an object of the present invention is to provide a motor of the electronic parking brake that can prevent the overlap of the motor case coupled to the actuator body to protect the case of the motor itself. .

In addition, it is an object of the present invention to provide a motor of the electronic parking brake that can improve the performance of the motor for a motor case of the same size as the conventional.

The motor of the electronic parking brake according to the present invention comprises a hollow motor case; A stator spaced apart from each other and fixedly coupled to an inner wall of the motor case; A rotor inserted into the motor case so as to be spaced apart from the stator, and rotating in response to the application of power; A drive shaft coupled to a center of the rotor and rotated by the rotational force of the rotor; And an actuator body to which the motor case is coupled such that the drive shaft is rotatably penetrated. .

Here, the stator or the rotor is made of a permanent magnet,

A coil is wound around the rotor or the stator corresponding to the permanent magnet.

Here, the commutator is connected to the wound coil so that the rotor rotates in a predetermined direction, the commutator to change periodically; And a brush module having a brush connected to the commutator so that power is applied to the coil. .

Here, the actuator body, the motor mounting hole is recessed so that the brush module is inserted and fixed.

Here, the bushing coupled to the drive shaft rotatably supported by the actuator body or the motor case; .

Here, a fastening bracket is formed at the end edge of the motor case so that the fastening member penetrates and is screwed to the actuator body.

As described above, in the motor of the electronic parking brake according to the present invention, unlike the conventional invention, the motor case coupled to the actuator body to protect the case of the motor itself may be prevented from overlapping.

In addition, the present invention can improve the performance of the motor for the motor case of the same size as the conventional.

In addition, the present invention can reduce the size of a motor with respect to a motor having the same performance as in the prior art.

In addition, the present invention can form a stator and a rotor for generating a rotational force integrally in the actuator body, thereby eliminating unnecessary parts, and can reduce the weight of the actuator while maintaining the same performance as the prior art.

The invention also facilitates maintenance of the motor in the electronic parking brake.

In addition, the present invention can reduce the manufacturing cost in accordance with the reduction of the components and the miniaturization and weight.

1 is a perspective view showing a motor of an electronic parking brake according to an embodiment of the present invention;
Figure 2 is an exploded view of Figure 1,
3 is a cross-sectional view of Fig.

Hereinafter, an embodiment of a motor of an electronic parking brake according to the present invention will be described with reference to the accompanying drawings. For convenience of description, the motor of the electronic parking brake which is integrally coupled to the actuator body will be described as an example. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a perspective view illustrating a motor of an electronic parking brake according to an embodiment of the present invention, FIG. 2 is an exploded view of FIG. 1, and FIG. 3 is a sectional view of FIG. 1.

1 to 3, the motor of the electronic parking brake according to an embodiment of the present invention is directly coupled to the actuator body 50, the motor case 10, the stator 20, and the rotor ( 30, a drive shaft 40, and an actuator body 50.

The motor case 10 is composed of a hollow enclosure, and the stator 20 and the rotor 30 are inserted therein.

The stators 20 are spaced apart from each other and fixedly coupled to the inner wall of the motor case 10.

The rotor 30 is inserted into the motor case 10 so as to be spaced apart from the stator 20. The rotor 30 is rotated while being spaced apart from the stator 20 according to the application of power.

The drive shaft 40 is fixed to the rotation center of the rotor 30 is rotated by the rotational force of the rotor 30.

The actuator body 50 allows the drive shaft 40 to rotatably penetrate the motor case 10 to be coupled thereto. In the actuator body 50, the motor mounting hole 51 may be recessed to insert and fix the brush module 70 to be described later.

In addition, the actuator body 50 is provided with a cartridge mounting portion 52 that can be coupled to the cartridge (not shown) for pressing the caliper by the rotational force of the drive shaft 40 to set the braking function or to release the braking function. The cartridge mounting opening 52 may be formed at one side of the motor mounting opening 51.

In addition, the actuator body 50 is formed with a transmission gear fitting 53 that can couple the gear assembly to reduce the rotational force of the motor. The transmission gear mounting opening 53 may be formed to face the motor mounting opening 51.

The stator 20 or the rotor 30 is made of a permanent magnet. Coils are wound around the rotor 30 or the stator 20 corresponding to the permanent magnet. Then, the applied power flows along the coil so that the rotor forms an electromagnet. Accordingly, the rotor 30 can be rotated by the magnetic field between the permanent magnet and the electromagnet.

In this case, the motor may include a commutator 60 and a brush module 70.

The commutator 60 periodically connects the power applied to the coil wound around the rotor 30 so as to rotate in a constant direction. Brush module 70 is provided with a brush 71 is connected to the commutator 60 so that power is applied to the coil.

In the present invention, the stator 20 is made of a permanent magnet, the coil is wound around the rotor 30, the commutator 60 is fixed to the drive shaft 40, the brush module 70 to the motor mounting 51 This is fixed.

Here, the bushing 80 may be coupled to the drive shaft 40. The bushing 80 allows the drive shaft 40 to be stably supported by the actuator body 50 or the motor case 10. In addition, the bushing 80 allows the drive shaft 40 to be smoothly rotated by the rotational force of the rotor 30. In addition, the bushing 80 may reduce a load generated when the driving shaft 40 rotates.

Here, the motor case 10 is screwed to the actuator body 50 through the fastening member 90. Accordingly, the fastening bracket 11 is formed at the end edge of the motor case 10. Then, the fastening member 90 is screwed to the actuator body 50 through the fastening bracket (11).

Now, the assembly process of the motor according to an embodiment of the present invention will be described.

First, the brush module 70 is inserted into and fixed to the motor mounting hole 51 formed in the actuator body 50, the stator 20 is fixed to the inner wall of the motor case 10, and the drive shaft is spaced apart from the stator 20. The rotor 30 to which the 40 and the commutator 60 are coupled and fixed is inserted into the motor case 10. In this case, one end of the drive shaft 40 is coupled to the bushing 80 so that one end of the drive shaft 40 is rotatably supported by the motor case 10.

Then, the motor mounting hole 51 is closed by the motor case 10 so that the drive shaft 40 passes through the center of the motor mounting hole 51. In this case, the other end of the drive shaft 40 is coupled to the bushing 80 so that the other end of the drive shaft 40 is rotatably supported by the motor case 10.

Then, the fastening member 90 is screwed to the actuator body 50 through the fastening bracket 11, thereby forming a motor in the actuator body 50.

When screwing is completed, the commutator 60 and the brush 71 of the brush module 70 are stably connected, and the motor is stably fixed to the actuator body 50.

Since the motor according to the present invention is integrally coupled to the actuator body 50, it is possible to increase the size of the stator 20 and the rotor 30 for the motor case 10 of the same size as the conventional, the performance of the motor This is improved.

In addition, in the case of a motor having the same capacity as in the related art, the size of the motor case 10 may be reduced as compared with the related art, thereby miniaturizing or reducing the electronic parking brake device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

10: Motor case 11: Fastening bracket
20: stator 30: rotor
40: drive shaft 50: actuator body
51: motor mounting hole 52: cartridge mounting hole
53: transmission gear fitting 60: commutator
70: brush module 71: brush
80: bushing 90: fastening member

Claims

Hollow motor case;
A stator spaced apart from each other and fixedly coupled to an inner wall of the motor case;
A rotor inserted into the motor case so as to be spaced apart from the stator, and rotating in response to the application of power;
A drive shaft coupled to a center of the rotor and rotated by the rotational force of the rotor; And
An actuator body to which the motor case is coupled such that the drive shaft is rotatably penetrated; Motor of the electronic parking brake comprising a.

The method of claim 1,
The stator or the rotor is made of a permanent magnet,
The motor of the electronic parking brake, characterized in that the coil is wound around the rotor or the stator corresponding to the permanent magnet.

The method of claim 2,
A commutator connected to the wound coil so that the power is periodically changed such that the rotor rotates in a predetermined direction; And
A brush module having a brush connected to the commutator so that power is applied to the coil; The motor of the electronic parking brake further comprising.

The method of claim 3,
The actuator body, the motor of the electronic parking brake, characterized in that the motor mounting hole is recessed so that the brush module is inserted and fixed.

5. The method according to any one of claims 1 to 4,
A bushing coupled to the drive shaft so as to be rotatably supported by the actuator body or the motor case; The motor of the electronic parking brake further comprising.

5. The method according to any one of claims 1 to 4,
The end of the motor case, the motor of the electronic parking brake, characterized in that a fastening bracket is formed so that the fastening member penetrates and screwed to the actuator body.