KR101720147B1 - Actuator for electro-mechanical brake - Google Patents

Abstract

According to the present invention, disclosed is an apparatus to operate an electromechanical brake, stably supplying electricity to an operation member in emergency, so as to improve braking stability. The apparatus comprises: a case part; an operation member installed inside the case part to supply rotary power; an emergency power supply unit connected to the operation member and supplying electricity to the operation member when power of a main power supply unit is cut off; a driving gear connected to an output shaft of the operation member to rotate with the output shaft; a connection gear part engaged with the driving gear to be rotated, and transferring power of the driving gear; and a reducer unit including a driven gear engaged with the connection gear part to be rotated, a linear gear axially connected to the driven gear to be rotated, and a planetary gear rotating around the outer circumference of the linear gear.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a driving apparatus for an electro-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a driving apparatus for an electromechanical brake, and more particularly, to a driving apparatus for an electromechanical brake capable of stably supplying electricity to a driving member even in an emergency, thereby improving braking safety.

In general, an electromechanical brake is a braking device which does not require components such as a booster, a master cylinder, and a brake hose, unlike a conventional hydraulic brake, and has a simple installation structure and contributes to weight reduction of a vehicle.

The basic configuration of the electromechanical brake includes a motor, a planetary gear set that receives the driving force of the motor, a roller cage that supports the rotation shaft of the roller, a thrust lamp that presses the roller toward the planetary gear set by the return spring, And a piston for moving the brake pad toward the brake disc.

Conventionally, since the power supplied to the motor for generating the braking force is supplied from the battery of the vehicle, there is a problem that the brake operation is not performed when the battery system fails. Therefore, there is a need for improvement.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 1996-7004749 (published October 10, 1996, entitled "VEHICLE ELECTROMECHANICAL OPERATING DISK BRAKE").

It is an object of the present invention to provide a driving apparatus for an electromechanical brake capable of stably supplying electric power to a driving member even in an emergency, thereby improving braking safety.

A drive device for an electromechanical brake according to the present invention is a drive device for an electromechanical brake, comprising: a case part; a driving member provided inside the case part to supply rotational power; and a power source connected to the driving member, A driving gear that is connected to the output shaft of the driving member and rotates together with the output shaft, a coupling unit that rotates in engagement with the driving gear and transmits power of the driving gear, a driven gear and a driven gear that rotate in engagement with the coupling unit, And a reduction portion having a sun gear rotating in an axial direction and a planetary gear rotating along an outer circumference of the sun gear.

According to another aspect of the present invention, there is provided a clutch device, comprising: a latch gear portion connected to an output shaft and rotated together with an output shaft, wherein a protruding gear is provided on the outer side; And a restraint driving unit for restricting the restraint.

It is preferable that the engaging gear portion includes a latching gear body which is fitted to the output shaft and rotates together with the output shaft, and a latching gear which is provided in a plurality of protruding shapes along the outer circumferential surface of the latching gear body.

It is preferable that the emergency power source unit uses a rechargeable battery that is charged by the power source of the main power source unit, and is installed continuously to the drive member.

The control method of a driving apparatus for an electromechanical brake according to the present invention includes the steps of: determining whether the power supplied from the control unit to the driving member is normal; and, when the power supplied to the driving member is out of the normal range, .

The step of determining whether or not the power supplied to the driving member is normal may further include determining whether the power supply is normal by measuring whether the main power supply is faulty or not and whether there is an error in the power supply of the vehicle.

In the driving apparatus for an electromechanical brake according to the present invention, when power is not supplied to the driving member, power is supplied to the driving member through the emergency power source unit, thereby improving braking safety.

1 is a perspective view schematically showing the outline of a driving apparatus for an electromechanical brake according to an embodiment of the present invention.
2 is a perspective view schematically showing a state in which the upper case part is separated from the lower case part according to the embodiment of the present invention.
3 is an exploded perspective view of a drive device for an electromechanical brake according to an embodiment of the present invention.
4 is a perspective view illustrating an exploded perspective view of the connector unit and the follower unit according to an embodiment of the present invention.
5 is a perspective view schematically showing a state before the restraint driving unit according to an embodiment of the present invention is operated.
6 is a perspective view schematically showing a state in which the restraint driving unit according to the embodiment of the present invention is operated.
7 is a bottom perspective view of a driving apparatus for an electromechanical brake according to an embodiment of the present invention.
8 is a block diagram of a driving apparatus for an electromechanical brake according to an embodiment of the present invention.
9 is a flowchart showing a control method of a driving apparatus for an electromechanical brake according to an embodiment of the present invention.

Hereinafter, a driving apparatus for an electromechanical brake according to an embodiment of the present invention will be described with reference to the accompanying drawings. For convenience of explanation, a driving apparatus for an electromechanical brake used in a car is taken 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.

Further, 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.

FIG. 1 is a perspective view schematically illustrating the external shape of a driving apparatus for an electromechanical brake according to an embodiment of the present invention. FIG. 2 is a schematic view showing a state in which an upper case part is separated from a lower case part according to an embodiment of the present invention. FIG. 4 is a perspective view illustrating an exploded perspective view of a connector unit and a longitudinal synchronizer according to an embodiment of the present invention. FIG. 4 is an exploded perspective view of the driving unit for an electromechanical brake according to an embodiment of the present invention. FIG. 5 is a perspective view schematically showing a state before the restraint driving unit according to an embodiment of the present invention is operated, and FIG. 6 is a perspective view schematically showing a state in which the restraint driving unit according to the embodiment of the present invention is operated 7 is a bottom perspective view of a driving apparatus for an electromechanical brake according to an embodiment of the present invention, and Fig. 8 is a perspective view of an electromechanical brake according to an embodiment of the present invention. A block diagram of a driving apparatus, and Fig. 9 is a flow chart showing a control method of a drive system for an electromechanical brake according to one embodiment of the present invention.

1 to 3, a driving apparatus 1 for an electromechanical brake according to an embodiment of the present invention includes a case 10, a driving member 20, an emergency power source 30, A coupling gear unit 40, a driven gear 50, a reduction gear 60, a gear gear unit 70, a constraining driving unit 80, and a control unit 90.

The case portion 10 forming the outer shape of the electromechanical brake drive device 1 includes an upper case 12 covering the upper side of the electromechanical brake drive device 1, And a lower case (16) coupled thereto. A mounting case 14 is provided inside the upper case 12 and a control unit 90 using a printed circuit board is provided between the mounting case 14 and the upper case 12. [

The driving member 20 is installed inside the case 10, and various types of driving devices can be used within the technical idea of receiving the energy source to generate the rotational power. The driving member 20 according to one embodiment uses an electric motor that generates rotational power by the supply of electricity. The output shaft 22 is projected to the outside of the driving member 20 and the output shaft 22 is rotated by the operation of the driving member 20. [ A first power input terminal 24 is provided below the driving member 20. The first power input terminal 24 is connected to the main power supply unit 100 and the emergency power supply unit 30 and is normally supplied with power from the main power supply unit 100 and is supplied with power from the emergency power supply unit 30 in an emergency .

The emergency power supply unit 30 is connected to the driving member 20 and various types of power storage devices can be used within the technical concept of supplying power to the driving member 20 when the power supply of the main power supply unit 100 is cut off. The emergency power source unit 30 according to an embodiment uses a rechargeable battery that is charged by the power of the main power source unit 100 and is installed in succession to the driving member 20. [ The emergency power supply unit 30 is connected to the lower side of the driving member 20 and the second power input terminal 32 provided to the driving member 20 is connected to the main power supply unit 100 and the emergency power supply unit 30 . Therefore, the power is supplied to the main power supply unit 100 and the power is supplied to the first power input terminal 24 of the driving member 20 in an emergency so that the driving member 20 stably operates even in an emergency .

The driving gear 35 is connected to the output shaft 22 of the driving member 20 and rotates together with the output shaft 22. The driving gear 35 protrudes upward from the lower case 16 and is installed in a vertical direction. The drive gear 35 is formed in a columnar shape, and a spiral tooth is formed on the outside of the drive gear 35.

3, 4 and 7, the linkage unit 40 rotates while engaging with the drive gear 35, and in the art of transmitting the power of the drive gear 35 to the driven gear 50, Or the like. The linkage unit 40 according to one embodiment includes a linkage gear shaft 42, a first linkage gear 44, and a second linkage gear 46.

The connecting gear shaft 42 protrudes to the upper portion of the lower case 16 and the first connecting gear 44 and the second connecting gear 46 are sequentially coupled to the upper side of the connecting gear shaft 42.

The first connecting gear 44 is located below the second connecting gear 46 and the first connecting gear 44 and the second connecting gear 46 are fitted together and rotated together. The protrusions protruding upward from the first connection gear 44 are inserted into the rotation center portion of the second connection gear 46 so that the rotation of the first connection gear 44 and the second connection gear 46 is synchronized. The first connecting gear 44 rotates in engagement with the driven gear 50 and the second connecting gear 46 meshes with the driving gear 35 and rotates. The second connecting gear 46 has a larger diameter than the first connecting gear 44 and is located above the first connecting gear 44.

The driven gear 50 rotates in engagement with the linkage unit 40, and is rotatably installed on the side of the driven gear 50. The driven gear 50 is fitted to the coupling shaft 52 protruding upward from the decelerator 60 and rotates together with the coupling shaft 52. A bearing 54 is disposed on the upper side of the driven gear 50 and a groove is formed in the lower portion of the mounting case 14 to receive the bearing 54. The driven gear 50 is engaged with the first coupling gear 44 of the coupling unit 40 and rotated.

The deceleration portion 60 for decelerating the power input to the driven gear 50 includes a sun gear 62, a planetary gear 64, a carrier 66, and a ring gear 68. The sun gear 62 is connected to the lower side of the connecting shaft 52 and rotates together with the connecting shaft 52. In other words, the sun gear 62 is axially connected to the driven gear 50 and rotates together with the driven gear 50.

A plurality of planetary gears 64 are provided along the circumference of the sun gear 62 and engage with the outside of the sun gear 62 to rotate in conjunction with the rotation of the sun gear 62. The planetary gear 64 according to one embodiment rotates along the outer perimeter of the sun gear 62.

The carrier 66 rotatably supports the planetary gear 64 and is formed in a plate shape below the planetary gear 64. The ring gear 68 is formed in a ring shape and meshed with the outer side of the planetary gear 64, and is fixed to the lower case 16.

The sun gear 62 is rotatably installed in the center of the carrier 66 and a plurality of planetary gears 64 are installed along the rim of the carrier 66 along the circumference of the sun gear 62. Thus, when the planetary gear 64 rotates in engagement with the sun gear 62, the carrier 66 connected to the planetary gear 64 rotates and decelerates.

Since the output gear 69 is fixed to the lower side of the carrier 66, the output gear 69 is rotated together with the carrier 66. The output gear 69 provides power to operate the brake.

The engaging gear portion 70 is connected to the output shaft 22 and is rotated together with the output shaft 22, and a protruding gear is provided on the outer side. The engaging gear portion 70 according to the embodiment includes an engaging gear body 72 which is fitted to the output shaft 22 and is rotated together with the output shaft 22, And a latch gear 74 installed in a protruding shape. The engaging gear 74 is slanted in the clockwise or counterclockwise direction to prevent the engaging gear portion 70 from slipping when the engaging gear 74 is engaged with the operating rod 84. [ One side of the latch gear 74 that is engaged with the operating rod 84 is vertically protruded from the latch gear body 72 and the other side that is not caught by the latch gear 74 is installed to be inclined with the latch gear body 72 . A spacer 102 is provided between the engaging gear portion 70 and the driving gear 35 to prevent interference between the driving gear 35 and the engaging gear portion 70 during operation.

5 and 6, the restraint driving part 80 is located inside the case part 10 and is operated by a control signal of the control part 90 so that the operating rod 84 . The restraint driving part 80 includes a restraining driving body 82 provided on the upper side of the lower case 16 and a restraining driving body 82 protruding from the restraining driving body 82 to be engaged with the retaining gear 74 to restrain rotation of the retaining gear 74 And an operating rod 84. [ The restraint driving unit 80 may use a solenoid valve, and a pneumo-hydraulic cylinder may be used if necessary. An electrically operated solenoid valve is used as the constraint driver 80 according to one embodiment.

In the state where the operating rod 84 is separated from the engaging gear portion 70, the driving gear 35 is rotated together with the engaging gear portion 70 so that the brake is actuated. In order to prevent the brake from loosening, (84) is moved and engaged with the engaging gear portion (70). Therefore, rotation of the drive gear 35 is restrained together with the engagement gear portion 70, thereby preventing the brake from loosening.

The main power unit 100 according to an embodiment is an automobile battery and the main power unit 100 and the control unit 90 are connected to each other so that the controller 90 can check whether the main power unit 100 operates normally or not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method of controlling an electromechanical brake driving apparatus 1 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 8 and 9, the control method of the electromechanical braking drive 1 according to the embodiment of the present invention determines whether the power supplied to the drive member 20 from the control unit 90 is normal (S10). ≪ RTI ID = 0.0 >

In the step of determining whether or not the power supplied to the driving member 20 is normal, the controller 90 determines whether the power is normal by measuring whether the main power unit 100 is faulty and whether there is an error in the vehicle power source. The control unit 90 determines whether the power supplied from the main power unit 100 is lower than the set voltage or the power is not properly supplied to the driving member 20 due to a power error of the vehicle.

And supplying power to the driving member 20 from the emergency power supply unit 30 when the power supplied to the driving member 20 is out of the normal range.

The control unit 90 controls the driving member 20 to supply power to the driving member 20 including a case where the power supplied from the main power unit 100 is lower than a predetermined voltage, The emergency power supply unit 30 is operated to supply power to the driving member 20.

As described above, according to the present invention, when power is not supplied to the driving member 20, power is supplied to the driving member 20 through the emergency power source unit 30, so that braking safety can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims. will be. Further, although the driving apparatus for an electromechanical brake used in an automobile has been described as an example, the driving apparatus for an electromechanical brake according to the present invention can also be used for a mechanical apparatus other than an automobile. Accordingly, the true scope of the present invention should be determined by the following claims.

1: Driving device for electromechanical brake
10: case part 12: upper case
14: mounting case 16: lower case
20: driving member 22:
24: First power input terminal 30: Emergency power source
32: second power input terminal 35: drive gear
40: connector unit 42: connecting gear shaft
44: first connection gear 46: second connection gear
50: driven gear 52: connecting shaft
54: Bearing 60:
62: sun gear 64: planetary gear
66: carrier 68: ring gear
69: output gear 70: engaging gear portion
72: engaging gear body 74: engaging gear
80: constraint driving part 82: constraint driving body
84: operating rod 90:
100: main power supply unit 102: spacer

Claims (6)

A case portion;
A driving member provided inside the case portion to supply rotational power;
An emergency power supply connected to the driving member and supplying power to the driving member when the power of the main power unit is cut off;
A driving gear connected to the output shaft of the driving member and rotated together with the output shaft;
A linkage unit which rotates in engagement with the drive gear and transmits power of the drive gear;
A driven gear that rotates in engagement with the linkage unit; And
And a reduction gear unit having a sun gear that is rotated in an axial connection with the driven gear and a planetary gear that rotates along an outer circumference of the sun gear,
An engagement gear portion connected to the output shaft and rotatable together with the output shaft, the engagement gear portion having a protruding gear disposed outside; And
And a restraint driving unit that is located inside the case unit and operates with a control signal of the control unit to actuate an actuating rod engaged with the engaging gear unit.
delete The method according to claim 1,
Wherein the engaging gear portion includes: an engaging gear body that is fitted to the output shaft and rotates together with the output shaft; And
And an engaging gear provided in a shape protruding along the outer peripheral surface of the engaging gear body.
The method according to claim 1,
Wherein the emergency power source unit uses a rechargeable battery charged by a power source of the main power source unit and is connected to the driving member.
delete delete

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