Electric reciprocating saw

Abstract

The invention discloses an electric reciprocating saw, comprising an enclosure and a motor which is used as a power source, wherein the motor is linked with reciprocating rods fixedly provided with saw blades through transmission mechanisms; two transmission mechanisms are arranged, have same structures and are arranged in parallel; each transmission mechanism comprises a large gear which is linked with an output end of the motor, a crank shaft fixed with the center of the large gear, and a swinging rod bearing arranged on the periphery of the crank shaft; the two large gears are respectively arranged at two sides of the tail end of the output end of the motor; the two reciprocating rods fixedly provided with the saw blades are arranged; and the swinging rod bearing in each transmission mechanism is connected with the respective reciprocating rod. The motor can drag the two large gears at the same time so that the two saw blades can do movements in opposite directions all the time so that the device can bear force in the opposite directions, resultant force of external force borne by the device is nearly zero and an unbalanced phenomenon does not happen; and therefore, the vibration caused by cutting is obviously reduced, the cutting is stable, the efficiency is high and the operation is safe. The relative position and the relative angle of a crank shaft body and a bearing inner ring are changed so that the saw blades have the two different working routes and the same reciprocating saw can meet the cutting requirements of workpieces with different textures at the same time.

Description

technical field [0001] The invention relates to a reciprocating saw, in particular to an electric reciprocating saw with double saw blades capable of realizing double strokes. Background technique [0002] The electric reciprocating saw is a relatively commonly used tool, which is widely used in industries such as automobiles, broadcasting, wood molding, decoration, leather, etc., and the workpiece is cut through the linear reciprocating motion of the saw blade. The cutting object of the reciprocating saw can be wood, metal or a mixture of these materials. Since the cutting object is relatively wide and easy to carry, it is suitable for home decoration and other occasions. [0003] Commonly used reciprocating saws are all single saw blades, and the rotational motion of the motor is converted into the reciprocating motion of the reciprocating rod through various transmission mechanisms, such as eccentric wheels and pendulum rods. Please refer to the Chinese patent with the au...

AI Technical Summary

Problems solved by technology

This is because the workpiece has a reaction force when the saw blade is cutting the workpiece. The consequence of this reaction force is that it is difficult for the operator to accurately control the reciprocating saw. It is not suitable for cutting some brittle materials, and it is easy to cause fatigue to the operator, making it impossible to use the reciprocating saw for a long time. In severe cases, the operation may be affected by the impact. cause harm

[0005] Furthermore, in the process of using the reciprocating saw, it is often necessary to cut workpieces of different textures, such as cutting soft workpieces and hard workpieces, requiring different strokes of the reciprocating saw, and the series excitation motor in the constant cigarette frequency, constant power condition However, only one speed can be provided, and double strokes cannot be realized, so the existing single-stroke reciprocating saws cannot meet different stroke requirements for different workpieces, thus affecting the use

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