Roller type tappet mechanism with role exchanging function

Abstract

The invention discloses a roller type tappet mechanism with a role exchanging function. The roller type tappet mechanism is characterized in that a plurality of convex regions and flat straight regions are transversely distributed at equal intervals in the normally-static portion in an intermittence mode, the lower portion of each convex region is in a wedge shape and protrudes, a normally-dynamicportion is arranged at the lower end of the normally-static portion, the two sides of the upper portion of the normally-dynamic portion are rotationally connected with the end portions of swing arm tappets correspondingly, the swing arm tappets on the left side and the right side are arranged symmetrically with respect to a middle line of the normally-dynamic portion, the upper ends of the swingarm tappets are rotationally connected with rollers, the rollers are attached to the lower surface of the normally-static portion, the lower ends of the swing arm tappets are connected with the upperends of push rods, the lower portions of the push rods are sleeved with sleeves, reset springs are arranged at the lower ends of the interiors of the sleeves, and the upper ends of the reset springs abut against the lower ends of the push rods. According to the roller type tappet mechanism, the push rods on the left side and the right side independently move up and down in a reciprocating mode todrive the swing arm tappets and the rollers to swing up and down to realize unidirectional intermittent driving on the normally-static portion, the swing arm tappets and the rollers ascend and descendat the lower portion of the normally-static portion with the convex-concave structure to replace reciprocating motion formed by a cam shaft, an eccentric wheel and other driving modes, and the push rods on the left side and the right side can exchange work with each other to achieve bidirectional intermittent driving.

Description

technical field [0001] The invention relates to a mechanical structure, in particular to a roller type tappet mechanism with interchangeable roles. Background technique [0002] Cams and eccentrics are widely used in mechanical transmission parts, and mechanical reciprocating motion is achieved through cams or eccentrics. The cam usually rotates continuously at a constant speed, and the follower is designed according to the requirements of use so that it can obtain a certain regular movement. The cam mechanism can realize complex motion requirements and is widely used in various automatic and semi-automatic mechanical devices; the eccentric wheel is also a kind of cam. Generally speaking, the main purpose of the eccentric wheel is to generate vibration, like an electric sieve, inside a mobile phone Most of the eccentric wheels of the vibrator are circular wheels, because the circular wheels are easy to manufacture and the process is simple. [0003] However, the existing e...

AI Technical Summary

Problems solved by technology

[0003] However, the existing eccentric wheels and cams often can only run in one direction when they are working, and the symmetrical directions are not interchangeable. It needs to be completed with the help of two symmetrical mechanisms. The structure is complex and the process is cumbersome.

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