| 摘要 |
PURPOSE: An oil hole piercing machine of a transmission carrier for a car is provided to move a plurality of motor units by one driving motor because a main bevel gear and a plurality of auxiliary bevel gears are used, thereby simplifying a structure and reducing manufacturing costs. CONSTITUTION: An oil hole piercing machine of a transmission carrier for a car comprises a carrier holder(1), a driving unit(10), and a machining unit(20). A driving motor(13) rotates a main bevel gear(11). The machining unit comprises auxiliary bevel gears(21), a rotary shaft(23), a moving body(25), and a drill unit(27). The auxiliary bevel gear is engaged with the main bevel gear. The rotary shaft is coaxially joined to the auxiliary bevel gear and rotated with the same to be integrated. The moving body moves forward and backward along the rotary shaft when the rotary shaft is rotated. The drill unit punches oil holes on the carrier placed on the carrier holder when the moving body moves forward to the carrier holder along the rotary shaft. The machining unit punches a plurality of the oil holes on the carrier and a plurality of the machining units are arranged in a circumferential direction of the carrier holder.
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