Bimetal hole saw connecting shank

Abstract

The invention discloses a connecting shank, and particularly discloses a bimetal hole saw connecting shank. The invention provides the bimetal hole saw connecting shank for preventing a hole saw from swaying after the hole saw is installed. The bimetal hole saw connecting shank comprises a connecting shank body and a transmission pin, wherein the connecting shank body comprises a motive power connecting end, a drilling saw connecting end provided with hole saw connecting threads and a spotter installing hole, and an installing part which is provided with an installing through hole. The installing part is arranged between the motive power connecting end and the drilling saw connecting end, and the transmission pin is arranged in the installing through hole and can move along the axial direction of the installing through hole. The bimetal hole saw connecting shank further comprises a hole saw firming device, wherein the hole saw stable device is arranged on the connecting shank body through a thread structure and can moves along the axis of the connecting shank body through the thread structure, and the hole saw stable device firms the hole saw through the movement along the axis of the connecting shank body. After the hole saw is connected with the drilling saw connecting end and the transmission pin is pushed into a pin hole, the hole saw firming device is continued to be twisted to be attached tightly to the top surface of the hole saw, so that the hole saw cannot sway in use.

Description

technical field [0001] The invention relates to a connection handle, in particular to a bimetal hole saw connection handle. Background technique [0002] Bi-metal hole saws can drill metal, non-ferrous metals, wood, plastics and various artificial materials such as laminates, MDF, laminated panels, asbestos boards, etc., and are widely used in construction, maintenance and some industrial manufacturing markets. The bimetallic hole saw mainly includes a hole saw, a center drill and a handle, wherein the handle includes a handle body and a transmission pin. The handle body is composed of a power connection end, a drilling saw connection end and an installation part. Between the connecting end of the drilling saw and the connecting end of the drilling saw, the connecting thread of the hole saw and the installation hole of the centering drill are arranged on the connecting end of the drilling saw, and the installation through hole is arranged on the installation part, the axis o...

AI Technical Summary

Problems solved by technology

[0004] 1) The hole saw is active during use. When the hole saw touches the surface of the workpiece, the hole saw will oscillate due to the thread connection gap problem, which will easily scratch the processed surface and affect the cutting effect and appearance.

[0005] 2) When the hole saw touches the workpiece, the teeth of the hole saw are easily broken due to the impact caused by the swing of the hole saw, and the teeth are easily embedded in the material to be processed, resulting in the inability to proceed smoothly again

[0006] 3) Due to the swing of the hole saw during the drilling process, the surface of the workpiece will have poor smoothness, poor hole shape and steps, etc.

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