Electronic parking brake actuator assembly with integral housing

Abstract

The invention relates to an electronic parking brake actuator assembly with a one-piece housing. The present invention includes: a main case, which is respectively formed with a motor installation part and a gear installation part; a motor part, which is provided on the motor installation part, and provides a rotational force; a gear part, which is rotated by the rotational force of the motor part, And the deceleration function is performed by a plurality of gears; the stator part, which constitutes the above-mentioned motor part, and at least a part thereof is insert-molded on the inner surface of the above-mentioned motor installation part; the ring gear, which is integrally formed on the above-mentioned gear installation part or is insert-molded In the above-mentioned gear installation part, the above-mentioned gear part is interlocked. In the present invention, the stator part of the motor part and the ring gear of the gear part constituting the actuator assembly are integrally formed in one main housing. Multiple components are thus aligned within one main housing, thereby improving axial alignment between the motor and individual gears.

Description

technical field [0001] The present invention relates to an actuator assembly for performing an electronic parking brake operation, and more particularly, to an electronic parking brake actuator assembly in which a stator and a ring gear are integrally formed in a housing. Background technique [0002] The electronic parking brake actuator of the automobile operates the friction pads of the calipers (Caliper) provided on the disc brake (disc brake) device when the vehicle is parked. The electronic parking brake is automatically operated by a user's switch operation, and for this purpose, is composed of an electronic parking brake motor and a gear assembly (power transmission device) for transmitting power of the motor. [0003] In the case of using the electronic parking brake as described above, when the driver presses the parking brake switch, the rotational force of the motor of the actuator is transmitted to the caliper through a gear assembly (power transmission device) ...

AI Technical Summary

Problems solved by technology

When the center distance between the rotating shafts deviates from the allowable range due to accumulated tolerances between parts, quality problems such as reduced performance or noise can occur

In particular, the vibration of the motor that occurs during operation causes rattling of parts such as gears due to accumulated tolerances as described above, and reduces the durability of the gears, thereby reducing the durability of the product

[0005] This is because, when assembling various components such as the built-in motor and gears, it is difficult to precisely align the shafts between the various components, and in particular, the gear assembly (or gearbox) for performing the deceleration function is an additional structure different from the motor assembly , so it is more difficult to align the axes between parts that are spaced apart from each other

[0006] In addition, for the actuator, since the number of built-in parts is too large, the number of processes required to assemble each part increases, and there is also a problem that the manufacturing time and manufacturing cost increase.

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