SU1445938A2 - Impact mechanism - Google Patents

Abstract

This invention relates to percussion machines. The purpose of the invention is to increase the efficiency of transmission of the impact pulse and increase the durability of the impact mechanism by increasing the contact area of the impact ends of the core of the impactor and the shank of the working tool. When the impact of the end face 8 of the core 6 and the shank 7 of the working tool 2, the end 8 of the core 6 is in contact with the shank 7 of the working tool 2 along the ring line, which increases the kinetic energy of impact. 4 il.

Description

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The invention relates to mechanical engineering, namely to devices intended for carrying out percussion works, and is an improvement of the invention according to the author. St. No. 1397274.

The purpose of the invention is to increase the efficiency of transmission of a shock pulse and increase the durability of the percussion mechanism by increasing the contact area of the percussion ends of the core of the striker and the shank of the working tool.

FIG. 1 and 2 show the impact mechanisms with different designs of the impact ends of the core of the impactor, variants; in fig. 3 and 4 - the same, with different execution of the impact ends of the core of the striker and the shank of the working tool.

The impact mechanism includes a directional cylinder 1, a working tool 2 and a drummer 3, consisting of a metal tubular body 4, a polymer tubular sleeve 5 and a conical shape of a metal core 6, which transmits a shock pulse to the shank 7 of the working tool 2. Profile of the impact end 8 of the core 6 drummer 3 is described in cross section by successively conjugate convex curves and a concave curve located between them.

The mechanism works as follows.

In the collision of the drummer 3 and the working tool 2, the core 6 of the drummer 3

contacts the shank of the working tool 2 along an annular line or only its part, which causes a larger contact area than with a point impact, which occurs when the impactor and the working tool collide with spherical or flat surfaces of the impact ends.

When the core 6 of the striker 3 contacts the shank of the working tool 2 along an annular line or only part of it, due to the larger contact area of the colliding impact ends, the specific shock load per unit surface of the shock ends of the core 6 of the striker 3 and the shank of the working tool 2, which causes large Impact efficiency and durability of impacting parts and, therefore, durability.

Claims (1)

Invention Formula Shock mechanism according to ed. St. No. 1397274, characterized in that, in order to increase the efficiency of shock impulse transmission and increase durability, the profile of the end face of the projectile in longitudinal section is described by successively conjugate convex and interposed concave curves between them, and the smallest diameter of the protruding part of the end is less than the diameter of the impact end of the working tool . Fy Fig.Z FIG.