SU71768A1 - Impact mechanism - Google Patents

Description

Mechanisms of percussive action, made in the form of a cylinder with a modified piston and a loose striker-zolipkom, blocking the end caps of the cylinder, are known.

In the described mechanism of percussive action, in contrast to the known mechanisms, the iodorishev cavity is connected to the cavity in front of the brisk cavity associated with the cylinder cavity by the above-mentioned Copticeye windows, the length of which is longer than the length of the bracer.

Such a structure creates the possibility of a two-way pneumatic connection between the drive piston and the free die.

In order to automatically turn on the striker at the beginning of work, the striker is positioned relative to the cylinder window and so that it is as a result of additional axial movement under the influence of the tool, does not open the windows, and the pneumatic action of the piston enters.

To keep the striker in the off position, intermittent devices are used, which are engraved with the tool during its axial reversing of the moment when it loses contact with the surface to be treated.

FIG. 1 shows the proposed mechanism in section; in fig. 2-; 7 - scheme of the mechanism.

The described percussion mechanism is enclosed in a casing 7, provided on the inner surface with ribs 2, the PA of which is fitted with a cylinder 3 with windows 4 at the end. Piston 5, carrying out up-and-out movements in cylinder 3, by means of the curvature of the crank mechanism 6 and 7, actuated from the electric motor and the mechanism. Flywheel 8 is designed to preserve the known constant rotation of curvature 6.

In front of the piston -5 in the cylinder 3 there is a loosely-located spool .9, whose length is less than the length, trench 4. In front of the leather .a /, with a non-drying guide bush, XB, QCTOSHK / i of any percussion instrument is inserted. The space between piston 5 and brisk 9. 3aiio; niC4iiioo 1К): 5spirit (1л1 ii Г1с) is covered, it is iioiiieAuiiiM and the solid part of the cylinder 3 6 () forms the so-called working buffer 5.

b 11 time 11 1st moment (fig. 3), when piston 5 is in the front (detaching tool) dead point, the firing pin 9 with its rear end coisMCHUieTCH with the edges of the windows (line a - and) and separates the worker of air-1 and th buffer | 1 with air in the casing mehanzm and.

In eiioe: K1) a direct working position of the firing pin .9 and several go beyond the line (o-a) of windows 4 in the direction of the tool. However, under the direction of the strike of the blow, you revolt back and, by the beginning of the search, the windows 4, of the compartment cover the working air space.

When Iorusha 5 iazad moves, the volume of the space between Ioria 1 and BOR1 9 increases, and 1 C, thanks to which in the working AIR buffer, it turns out 1) Azusts is a vacuum, ii resulting in (i) Delays and () deasy:;

By the time of the arrival of Ioria 5 to the rear dead position, the striker 9 acquires, iiei OTOpyio will move to iraivlesh from the instrument of percussion action.

11e1111d 15 rear dead nano, nopnieiH o starts to move in the direction of the striker 9. Thanks to this counter pressure, the air buffer pressure increases from vacuum to some io 5 times sufficient for stopping back pressure and to get a piece of wealth. in the direction of the tool (fn 5 n 6).

At the moment when Works 5, finishing the working cycle, comes to its alternate dead position, the firing pin 9 also reaches its k working position, in which he blows a blow but with the W button of the tool and opens the windows 4 at the same time, several) KO nparsee line (a-a) (Fig. 7).

Thus, through the slots of the windows, but each nickle, pressure equalization in the air buffer and in the one-way atmosphere of the casing of the mechanism occurs. The next moment, the hammer 9 but the inertia of the impact returns for the line (a-a), the compartment working p, the buffer and the cycle is repeated.

In case the tool ceases to come into contact with the processed top, for example, when raising the hammer, the tool shank 10 under the influence of the impact of the striker 9 will advance the middle body to move the far end of the working position. This front edge of the striker will drop over the locking balls 11 and the striker will automatically shut down (Fig. 2). When pressing the tool on the surface being processed with the shank, the firing pin will be taken out of the latch 11 and bring it to its original position for the workgroup. After this, work is automatically resumed.

Subject and reference

Claims (3)

I. The mechanism of percussion, made in the vnde tsilppdra with nrnvodnym piston in it and the free striker-spool, closing the end windows of the cylinder, characterized in that, with the aim of creating an two-way pneumatic connection between the actuating piston and the free striker, the floor connected to a cavity in front of the striker channel connected with the cylinder cavity by said end windows, the length of which is longer than the striker length. 2. The form of the mechanism according to p. 1, characterized in that, in order to automatically turn on the striker at the beginning of work, the firing pin is positioned relative to the piston and cylinder windows so that, as a result of additional axial movement under the influence of the tool, it overlaps the windows and iodine pneumatic impact 3. The form is made of the mechanism for and. 2, characterized in that, in order to keep the striker in the off position, locking devices are used that are controlled by the tool during its axial movement at the time of its loss of contact with the surface to be treated.