Screw tap overload protection device

Abstract

The invention discloses a screw tap overload protection device. The screw tap overload protection device comprises a knife handle, wherein a transmission sleeve is sleeved outside the knife handle in a sliding manner; the conical bottom part of the knife handle extends out of the bottom of the transmission sleeve; a waist-shaped slot is arranged on the knife handle; a bolt passes through the transmission sleeve and extends into the waist-shaped groove of the knife handle to connect the transmission sleeve and the knife handle; a nut sleeve is sleeved outside the transmission sleeve; a screw tap chuck is mounted below the transmission sleeve in the nut sleeve; a square hole is arranged in the middle of the screw tap chuck; the two sides of the upper end of the middle square hole in the screw tap chuck are provided with an adjusting screw respectively; the inner side of each adjusting screw is provided with a steel ball; a compression spring sleeved on each adjusting screw exactly pushes against the corresponding steel ball; multiple small holes are uniformly arranged on the periphery of the upper end surface of the screw tap chuck; the lower end of the transmission sleeve is provided with a plurality of strip holes dead against the multiple small holes; and a ball column pushed by the corresponding compression spring is mounted in each strip hole. The screw tap overload protection device disclosed by the invention can automatically protect a screw tap and avoid the screw tap from being broken under the condition that the torque of the screw tap is increased, thereby reducing the production cost.

Description

technical field [0001] The invention mainly relates to a screw tap overload protection device. Background technique [0002] The top cylinder head of a gasoline engine cylinder block produced by our company is connected to an M9 threaded hole with a tapping depth of 92, and the counterbore φ10 is 55 deep. It often happens that the tap torque increases and is broken, and it is troublesome to take out the tap. If the tap cannot be taken out, the entire cylinder block will be scrapped. Most of the existing gasoline engine processing taps are imported taps, and the taps are broken and the cylinder block is scrapped, which increases the production cost. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a tap overload protection device, which has an ingenious and reasonable structural design, can automatically protect the tap when the torque of the tap increases, prevents the tap from breaking, and reduces production co...

AI Technical Summary

Problems solved by technology

[0002] The top cylinder head of a gasoline engine cylinder block produced by our company is connected to an M9 threaded hole with a tapping depth of 92, and the counterbore φ10 is 55 deep. It often happens that the torque of the tap increases and the tap is broken, and it is troublesome to take out the tap. If the tap cannot be taken out, the entire cylinder block will be scrapped

Most of the existing gasoline engine processing taps use imported taps, the taps are broken and the cylinder block is scrapped, which increases the production cost

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