Labor-saved bolt cutter

Abstract

The invention provides a labor-saved bolt cutter. The labor-saved bolt cutter comprises a tool bit, a connecting arm and a handle; the tool bit is connected with the upper end of the connecting arm; the handle is connected with the lower end of the connecting arm; the connecting arm includes a left connecting arm, a first right connecting arm and a second right connecting arm; a left tool bit connecting hole connected with a left tool bit, a first hole and a second hole are arranged at the upper end of the left connecting arm in sequence from left to right; the lower end of the left connecting arm is connected with the handle; a third hole and a right tool bit connecting hole connected with a right tool bit are formed in the upper end of the first right connecting arm; the first hole and the third hole are connected by a bolt; a long hole is formed in the lower end of the first right connecting arm; a fourth hole is formed in the upper end of the second right connecting arm, and is connected with the second hole by a bolt; a pin shaft hole is formed in the middle part of the second right connecting arm, and is connected with the long hole through a pin shaft; the pin shaft can slide along the long hole; and the lower end of the second right connecting arm is connected with the handle. The labor-saved bolt cutter is simple in structure and obvious in labor saving effect; and the force range in the shearing process is 64-92% that of a traditional bolt cutter.

Description

technical field [0001] The invention belongs to the field of hand tools, in particular to a labor-saving bolt cutter. Background technique [0002] A bolt cutter is a tool used to cut metal wires, bars, etc. The cutter head of the bolt cutter is made of high-quality alloy steel, which has extremely high hardness and toughness, and can cut high-hardness materials. Its cutting edge is sharp, wear-resistant, and has low shear resistance. Locknuts are all specially heat-treated. [0003] The bolt cutter is mainly composed of a cutter head, a link arm and a handle. The cutter head and the link arm are connected to each other by screws, and the handle is set at the end of the link arm. The two arms are also connected to each other by screws. Its working principle is: when you need to cut an object, open the two handles and the joint arms, and the two cutter heads will also open, put the object between the cutting edges of the two cutter heads, and then close it forcefully, and ...

AI Technical Summary

Problems solved by technology

Due to the above structure, although the joint arm has a certain leverage and can achieve the function of saving labor, the shearing force that the bolt cutter can achieve is proportional to the length of the handle.

When the bar is very hard or the diameter is large, the force required for cutting is very large, and the labor intensity of long-term work is very high. This defect basically exists in the existing traditional bolt cutters.

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