SU563489A1 - Percussion mechanism - Google Patents

Description

one

The invention relates to the field of the mining industry, in particular to drilling machines with reciprocating movement of a tool.

According to the main author. St. No. 391269 is known for a percussion mechanism, including a hull, a striker, a striker drive and an eccentric vibrator.

However, during the operation of such a percussion mechanism, as a result of the action of a periodic twist of w, of its moment of resistance, torsional oscillations arise on the drive of the jay, which cause dynamic loads and thereby reduce the efficiency of the system.

The purpose of the invention is to increase efficiency by reducing dynamic loads.

For this, the percussion mechanism is equipped with a satellite-unbalance vibrator, which by means of a carrier is connected with the rifle striker's irivod, while the number of zoos of the deceleration wheel and the debalapses satellites are the same.

Pa figs. 1 shows a kinematic diagram of a shock mechanism; FIG. 2 - satellite imbalance vibrator, general view; in fig. 3 shows the direction of rotation of the drive shaft of the impact mechanism.

The percussion mechanism contains the drive shaft 1, the body 2, the head 3, tool 4, drove 5, satellites unbalances 6, central

wheel / attached but not to body 2, 1 eccentric vibrator 8.

The shock mechanism works in the following ways.

In cocking the striker 3, the moment of resistance on the shaft 1 counteracts the driving moment, and when accelerating the striker 3, there is no moment of resistance on the shaft. Such a work process of the striker causes torsional oscillations of the drive shaft of the striker, and, accordingly, of the entire system: the drive of the striker - gearbox - engine (in the drawing, the gearbox and engine of the impact mechanism are not shown).

The torsional vibrations of the drive shaft 1 of the striker, as a source of torsional vibrations of the entire system, are reduced as follows when the shaft 1 rotates: movement is transmitted through drove 5 to satellites debala 6, ipn this satellites debalans 6 running around its own wheel axis.

When the satellites unbalances 6 are rotated, inertial forces arise due to the presence of unbalanced masses of the satellites unbalances 6. These inertial forces, acting on the carrier 5, create a torque to the drive shaft of the striking mechanism.