KR20230036314A - Actuator for vehicle - Google Patents

Abstract

Disclosed is an actuator for a vehicle. The disclosed actuator for a vehicle comprises: a housing unit mounted in a vehicle body; a motor unit installed in the housing unit to provide power; a transmission unit transmitting rotating force of the motor unit; and an output unit discharging power of the transmission unit.

Description

Vehicle actuator {ACTUATOR FOR VEHICLE}

The present invention relates to an actuator for a vehicle, and more particularly, to an actuator for a vehicle that simplifies the manufacturing process and prevents generation of cracks due to processing.

Generally, when a vehicle is parked, the movement of the vehicle is restrained by manipulating the parking brake. In a conventional parking brake, when a cable is pulled by a parking lever, the force applied to the cable is distributed to a brake mechanism mounted on a wheel through an equalizer, and through this, the brake mechanism restrains the wheel to prevent vehicle movement.

Since the lever operation of the parking brake makes the user feel uncomfortable, an electrical parking brake (EPB) device that generates a parking braking force using motor power by button operation is being developed.

The electronic parking brake system, in which braking/release is controlled with a simple button operation without lever operation, eliminates the inconvenience of manually operating the parking lever, thereby providing an advantage of increasing driver convenience.

Electronic parking brake devices include a cable puller type, a motor-on-caliper type (commonly referred to as "caliper integrated type" in the industry), and a hydraulic parking brake type. Among them, a caliper-integrated type, which facilitates the mounting of the parking brake device by integrating it into the caliper, is widely applied.

Since the electronic parking brake device generates braking force by using hydraulic braking through a brake pedal and motor power through an actuator, which is an electric power generation means, it can perform both hydraulic braking and electric parking braking.

In particular, when the electronic parking brake device is integrated with the caliper, a compact configuration that does not increase the size of the caliper is possible by applying a gear device that converts the final output into a large load while using a small motor.

Looking at the configuration, the electronic parking brake device includes a button operated by a driver, a controller that receives a button operation signal and outputs a control signal to generate a parking braking force, an actuator that generates power according to the control signal output from the controller, and a wheel. It includes a caliper (EPB caliper) that is installed to surround the mounted disk and implements parking braking by restraining the disk and wheels with the power of the actuator.

On the other hand, the rotational force of the actuator is transmitted to the spindle and converted into a linear moving force that advances the nut member, and when the linearly moving nut member moves forward and contacts the inner surface of the piston, the piston is pushed and the disk is compressed through the pad, resulting in a braking force will cause

However, in the conventional electronic parking brake device, since the actuator has a configuration manufactured by a forging method and post-processing must be performed after the forging method, the processing process is cumbersome and complicated. Moreover, there is a problem in that there is a high probability of cracks occurring in the gear during the machining process. Therefore, there is a need to improve this.

The background art of the present invention is published in Republic of Korea Patent Publication No. 2010-0008512 (published on January 26, 2010, title of the invention: caliper-integrated electronic parking brake device with emergency release function).

The present invention has been created by the above needs, and an object of the present invention is to provide an actuator for a vehicle that simplifies the manufacturing process and prevents cracking due to processing.

In order to achieve the above object, an actuator for a vehicle of the present invention includes: a housing portion mounted on a vehicle body; a motor unit installed in the housing unit to provide power; Transmission unit for transmitting the rotational force of the motor unit; And an output unit for discharging the power of the transmission unit; characterized in that it comprises a.

In addition, the output unit is characterized in that produced by a high-density sintering method.

In addition, the housing unit has an open shape at one side of the housing to which the motor unit, the transmission unit and the output unit are mounted; and a cover covering the open area of the housing.

In addition, the transmission unit, the transmission shaft portion mounted to the housing; a first transmission gear part rotatably coupled to the transmission shaft part and rotated in engagement with the motor part; and a second transmission gear portion connected to the first transmission gear portion and engaged with the output portion.

In addition, the output unit may include a first output gear unit engaged with the first transmission gear unit and receiving rotational force of the second transmission gear unit; a second output gear unit connected to the first output gear unit and receiving rotational force from the first output gear unit; a third output gear unit connected to the second output gear unit and receiving rotational force from the second output gear unit; and an output frame part fastened to the third output gear part and surrounding the third output gear part.

In addition, the third output gear unit may include: a third output shaft unit coupled to the second output gear unit; a plurality of third output gear units surrounding the second output gear unit and engaged with the second output gear unit; a plurality of third output actuating shaft parts respectively coupled to the plurality of third output gear parts; and a third output operation holding unit coupled to the third output shaft unit and the plurality of third output operation shaft units, coupled to the output frame unit, and manufactured by the high-density sintering method.

In addition, the third output operation holding unit may include a third output operation holding plate unit to which the third output shaft unit and a plurality of the third output operation shaft units are coupled; and a third output operation gear unit integrally formed with the third output operation holding plate unit.

In the vehicle actuator according to the present invention, as the third output operation holding unit is manufactured by a high-density sintering method, the manufacturing process is simplified, and cracks due to processing can be prevented from being prevented.

1 is a schematic diagram of an actuator for a vehicle according to an embodiment of the present invention.
2 is a partially exploded perspective view of an actuator for a vehicle according to an embodiment of the present invention.
3 is a partially exploded perspective view of an actuator for a vehicle according to an embodiment of the present invention viewed from a different direction.
4 is a cross-sectional view of an actuator for a vehicle according to an embodiment of the present invention.
5 is an exploded perspective view of an actuator for a vehicle according to an embodiment of the present invention.
6 is an exploded perspective view of an actuator for a vehicle viewed from another direction according to an embodiment of the present invention.
7 is a view showing a third output operation holding unit of an actuator for a vehicle according to an embodiment of the present invention.
8 is a view of a third output operation holding unit of an actuator for a vehicle viewed from another direction according to an embodiment of the present invention.

Hereinafter, an actuator for a vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, definitions of these terms will have to be made based on the content throughout this specification.

1 is a schematic diagram of an actuator for a vehicle according to an embodiment of the present invention, FIG. 2 is a partially exploded perspective view of an actuator for a vehicle according to an embodiment of the present invention, and FIG. 3 is a view for a vehicle according to an embodiment of the present invention. An exploded perspective view of a part of an actuator viewed from another direction, Figure 4 is a cross-sectional view of a vehicle actuator according to an embodiment of the present invention, Figure 5 is an exploded perspective view of a vehicle actuator according to an embodiment of the present invention, Figure 6 is the present An exploded perspective view of a vehicle actuator according to an embodiment of the present invention viewed from another direction, and FIG. 7 is a view showing a third output operation holding unit of the vehicle actuator according to an embodiment of the present invention, and FIG. 8 is an embodiment of the present invention It is a view looking at the third output operation holding part of the vehicle actuator according to the example from the other direction.

1 to 8 , a vehicle actuator 1 according to an embodiment of the present invention includes a housing part 100, a motor part 200, a transmission part 300 and an output part 400. The housing part 100 is mounted on a vehicle body. The housing part 100 includes a housing 110 and a cover 120 . The housing 110 has an open shape on one side, and a motor unit 200, a transmission unit 300, and an output unit 400 are mounted thereto.

The cover 120 covers the open area of the housing 110 . The upper part of the housing 110 (refer to FIG. 2 ) is inserted into the cover 120 . That is, the housing 110 and the cover 120 adopt a double sealing structure, so that even if a separate gearbox is removed, gears can be accommodated and noise can be suppressed during power transmission by the gears.

The motor unit 200 is installed in the housing unit 100 to provide power. The motor unit 200 includes a motor driving unit 210 , a motor shaft unit 220 and a motor gear unit 230 . The motor driving unit 210 is driven when power is applied. The motor shaft part 220 is rotated by the motor driving part 210 . The motor gear part 230 is formed on the outside of the motor shaft part 220 and is engaged with the transmission part 300 .

The transmission unit 300 transmits rotational force of the motor unit 200 . The transmission part 300 includes a transmission shaft part 310 , a first transmission gear part 320 and a second transmission gear part 330 . Transmission shaft portion 310 is mounted on the housing (110). The transmission shaft portion 310 is mounted in the space portion 111 formed in the housing 110 and coupled to the central portion of the transmission shaft portion 310 .

The first transmission gear unit 320 is rotatably coupled to the transmission shaft unit 310 and rotates in engagement with the motor unit 200 . The first transmission gear unit 320 is rotated by receiving power from the motor unit 200 .

The second transmission gear unit 330 is connected to the first transmission gear unit 320 and engages and engages with the output unit 400 . The second transmission gear unit 330 may extend to one side from the first transmission gear unit 320 and transmits rotational force to the output unit 400 . In this case, the second transmission gear unit 330 may have a diameter smaller than that of the first transmission gear unit 320 .

The output unit 400 discharges the power of the transmission unit 300 . The output unit 400 may provide braking force in the electronic parking brake by inducing linear movement of a nut (not shown). In addition, the output unit 400 may be applied to various electric parts to induce linear movement. The output unit 400 is manufactured by a high-density sintering method.

The output unit 400 includes a first output gear unit 410 , a second output gear unit 420 , a third output gear unit 430 and an output frame unit 440 . The first output gear unit 410 meshes with the second transmission gear unit 330 and receives rotational force of the second transmission gear unit 330 .

The second output gear unit 420 is connected to the first output gear unit 410 and receives rotational force from the first output gear unit 410 . The second output gear unit 420 may extend to one side from the first output gear unit 410 and transmits rotational force to the third output gear unit 430 . In this case, the second output gear unit 420 may have a diameter smaller than that of the first output gear unit 410 .

The third output gear unit 430 is connected to the second output gear unit 420 and receives rotational force from the second output gear unit 420 . The third output gear unit 430 includes a third output shaft unit 431, a plurality of third output gear units 432, a plurality of third output operation shaft units 433, and a third output operation holding unit 434. The third output shaft part 431 is coupled to the second output gear part 420 . The third output shaft unit 431 has one end coupled to the central portion of the second output gear unit 420 and the other end coupled to the third output operation holding unit 434 .

The plurality of third output gear units 432 surround the second output gear unit 420 and engage and engage with the second output gear unit 420 . The plurality of third output gear units 432 are rotated by receiving rotational force from the second output gear unit 420 . For example, four third output gear units 432 cover the outside of the second output gear unit 420 and are rotated by receiving rotational force from the second output gear unit 420 . At this time, the number of third output gear units 432 may be four.

The plurality of third output operating shaft parts 433 are respectively coupled to the plurality of third output gear parts 432 . The third output operation shaft portion 433 has one end coupled to one end of the third output gear unit 432 and the other end coupled to the third output operation holding unit 434 .

The third output operation holding unit 434 is a combination of a third output shaft unit 431 and a plurality of third output operation shaft units 433, coupled to the output frame unit 440, and manufactured by a high-density sintering method.

The third output operation holding unit 434 includes a third output operation holding plate unit 434a and a third output operation gear unit 434d. The third output operation holding plate part 434a is coupled with the third output shaft part 431 and the plurality of third output operation shaft parts 433 . A first coupling hole portion 434b to which the third output shaft portion 431 is coupled is formed at the center of the third output operating holding plate portion 434a. The third output operation holding plate part 434a is spaced apart at a predetermined angle so as to surround the first coupling hole part 434b. At this time, the plurality of third output actuating shaft portions 433 are coupled to the plurality of second coupling hole portions 434c, respectively.

The third output operation gear unit 434d is integrally formed with the third output operation holding plate unit 434a. The third output operation gear unit 434d may be integrally formed with the third output operation holding plate unit 434a by a high-density sintering method. As a result, the manufacturing process of the third output operation holding unit 434 is simplified, and cracks due to processing can be prevented from being prevented.

The output frame unit 440 is engaged with the third output gear unit 430 and surrounds the third output gear unit 430 . The output frame unit 440 is engaged with the third output operating holding plate unit 434a of the third output gear unit 430 . The output frame unit 440 is seated on the housing 110 of the housing unit 100.

Hereinafter, the operation and effect of the actuator for a vehicle according to an embodiment of the present invention will be reviewed.

When the motor unit 200, the transmission unit 300, and the output unit 400 are mounted on the housing unit 100, and a cable (not shown) is electrically connected to the motor unit 200 to supply power, gear engagement occurs. As a result, the rotational force of the motor unit 200 is output to the output unit 400 .

When the motor unit 200 is driven, the motor gear unit 230 of the motor unit 200 is rotated from the motor driving unit 210 of the motor unit 200 via the motor shaft unit 220 of the motor unit 200 .

The first transmission gear part 320 of the transmission part 300 meshed with the motor gear part 230 is rotated, and the first transmission gear part 320 of the transmission part 300 is interlocked with the second transmission part 300. The second transmission gear unit 330 engages with the output unit 400 to transmit rotational force.

Specifically, the second transmission gear unit 330 of the transmission unit 300 meshes with the first output gear unit 410 of the output unit 400 to transmit rotational force. The second output gear unit 420 of the output unit 400 is rotated in conjunction with the first output gear unit 410 of the output unit 400 . The rotational force of the second output gear unit 420 of the output unit 400 is transmitted to the third output gear unit 430 of the output unit 400 .

The second output gear unit 420 of the output unit 400 is transmitted to the plurality of third output operating shaft units 433 of the third output gear unit 430 .

The rotational force transmitted to the plurality of third output operation shaft units 433 is output through the third output operation holding unit 434 . That is, the rotational force is output through the third output operation gear unit 434d of the third output operation holding unit 434 . At this time, the third output operation holding unit 434 is fastened to the output frame unit 440, so that the left and right flow is blocked, and the rotational force is reduced and output.

The present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and those skilled in the art can make various modifications and equivalent other embodiments. will understand

Therefore, the true technical protection scope of the present invention should be determined by the claims below.

1: vehicle actuator 100: housing part
110: housing 111: space
120: cover 200: motor unit
210: motor drive unit 220: motor shaft unit
230: motor gear part 300: transmission part
310: transmission shaft part 320: first transmission gear part
330: second transmission gear unit 400: output unit
410: first output gear unit 420: second output gear unit
430: third output gear unit 431: third output shaft unit
432: third output gear unit 433: third output operating shaft unit
434: 3rd output operation holding unit 434a: 3rd output operation holding board unit
434b: first coupling hole portion 434c: second coupling hole portion
434d: third output operating gear unit 440: output frame unit

Claims (7)

a housing part mounted on a vehicle body;
a motor unit installed in the housing unit to provide power;
Transmission unit for transmitting the rotational force of the motor unit; and
An actuator for a vehicle, characterized in that it comprises a; output unit for discharging the power of the transmission unit.
According to claim 1,
The vehicle actuator, characterized in that the output unit is manufactured by a high-density sintering method.
According to claim 2,
the housing part,
a housing in which one side is opened and the motor unit, the transmission unit, and the output unit are mounted; and
A vehicle actuator comprising a; cover covering the opened area of the housing.
According to claim 3,
The delivery unit,
Transmission shaft mounted on the housing;
a first transmission gear part rotatably coupled to the transmission shaft part and rotated in engagement with the motor part; and
A vehicle actuator comprising a; second transmission gear part connected to the first transmission gear part and meshed with the output part.
According to claim 4,
the output unit,
a first output gear unit engaged with the first transmission gear unit and receiving rotational force of the second transmission gear unit;
a second output gear unit connected to the first output gear unit and receiving rotational force from the first output gear unit;
a third output gear unit connected to the second output gear unit and receiving rotational force from the second output gear unit; and
An actuator for a vehicle, characterized in that it comprises an output frame part fastened to the third output gear part and surrounding the third output gear part.
According to claim 5,
The third output gear unit,
a third output shaft coupled to the second output gear;
a plurality of third output gear units surrounding the second output gear unit and meshingly coupled with the second output gear unit;
a plurality of third output actuating shaft parts respectively coupled to the plurality of third output gear parts; and
and a third output operation holding unit coupled to the third output shaft unit and the plurality of third output operation shaft units, fastened to the output frame unit, and manufactured by the high-density sintering method.
According to claim 6,
The third output operation holding unit,
a third output operation holding plate unit to which the third output shaft unit and a plurality of the third output operation shaft units are coupled; and
A vehicle actuator comprising a; third output operation gear unit integrally formed with the third output operation holding plate unit.

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