A device for digging square or rectangular holes/slots

Abstract

The invention provides a device for digging square or rectangular holes / slots. The device comprises a transmission shaft, a rectangular metal block, a chain-shaped annular ring sleeving the exterior of the rectangular metal block and a gear mounted on the transmission shaft, wherein the thickness of the transmission shaft is smaller than the height of the rectangular metal block; a cylindrical hollow cavity is dug downwards in the rectangular metal block from the upper center point at a certain diameter; a circular notch used for mounting the gear and capable of moving up and down is formed in the middle of the cylindrical hollow cavity; a through hole for passing of the transmission shaft is also formed in the middle of the bottom of the rectangular metal block; the side wall of the notch of the rectangular metal block is through; the gear is meshed with the chain-shaped annular ring sleeved with the exterior of the rectangular metal block at the through part of the side wall of the notch; the chain-shaped annular ring is driven to rotate around the rectangular metal block; the gear is driven to rotate by the transmission shaft; the gear is meshed with the chain-shaped annular ring to drive the chain-shaped annular ring to rotate, thereby enabling a cutter to rotate and cut walls and wood boards, so that a square or rectangular deep slot or hole is formed; the deep slot or hole is regular in edge.

Description

technical field [0001] The invention belongs to small electric engineering construction tools, and relates to a "device for digging square or rectangular holes / grooves". Background technique [0002] The electric drill transmits power through the transmission rod coaxially linked with the motor shaft. The end of the transmission rod that is not connected to the motor shaft is equipped with a fixture, and the drill bit is locked with the fixture to realize the joint rotation of the drill bit and the motor, which can be used to dig circular penetrations. For small holes or impenetrable holes, the ratio of the hole diameter to the depth is generally small. In addition, the circular hole opener replaces the drill bit of the electric drill with a circular cutting tool and can be used to dig larger round holes or holes. [0003] At present, in the process of engineering construction, it is often necessary to dig square or rectangular grooves on the ground, walls or hard objects. N...

AI Technical Summary

Problems solved by technology

[0003] At present, in the process of engineering construction, it is often necessary to dig square or rectangular grooves on the ground, walls or hard objects. No matter whether it penetrates or not, there are currently no corresponding electric tools to complete the construction. It is necessary to use hand tools to dig, similar to carpentry technology. , the edge of the groove or hole excavated in this way is difficult to trim, the work efficiency is low, the work intensity is high, and the square hole or groove excavated is irregular and beautiful

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