DE1184304B - Method for operating a pick hammer and pick hammer for carrying out the method - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

DESIGN SCREEN

Boarding school Class: E 21c

Number:
File number:
Registration date:
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German class: 5b-27/01

1184 304
M44067VI a / 5b
January 22, 1960
December 31, 1964

The invention relates to a method for operating a picking hammer and to a picking hammer to carry out the procedure.

In the case of pneumatic tools, it is already known to achieve increases in performance in various ways. So is z. B. the exact coordination of the control channels a means to increase the performance considerably influence. The size and design of the pistons is also of particular importance for performance.

To increase the power and reduce the recoil, it is also known to use air pressure separate from each other for the impact and return stroke and one chamber each with different compressed air Forming pressures. There are already pneumatic hammers in which the piston after a compressed air is applied again to a certain work path. However, it is not possible to use the Piston with a normal pressure, for example of 4 atmospheres, to apply, since the in a through the Handle hood and the annular space formed from the control housing stored compressed air not directly, but only reaches the space, which increases very quickly during the stroke stroke, via transverse channels, in which is already partially expanded compressed air.

According to the present invention, it is proposed that the stroke stroke in the Cylinder chamber expanding compressed air through one or more in the stroke stroke direction into the cylinder chamber opening additional compressed air connections during the stroke stroke to the respective normal pressure is filled, with the additional compressed air connections to the main inlet line of the Compressed air are connected.

As a result, the piston receives further pressures after a certain stroke, which makes a significant difference higher piston speed is achieved.

It is also advantageous that the actual compressed air inlet bore is in communication with a storage channel provided in the cylinder wall, which via an annular channel of the control slide with a second channel arranged in the cylinder wall in Is connected, of which one or more additional inlet bores into the cylinder space to lead. It is also advantageous that the control process used to fill up the cylinder space is controllable by means of the lowest stage of the control slide through the ring channel.

The invention is based on a drawing that schematically represents any embodiment, explained in more detail. It shows

Method of operating a pick hammer
and pick hammer for implementation
of the procedure

Applicant:

Maschinenfabrik Korfmann G. m. B. H.,

Witten / Ruhr, Bruchstrasse 36

Named as inventor:

Wilhelm Kampmann, Witten / Ruhr

Fig. 1 shows the partial longitudinal section through a pneumatic impact tool during the stroke stroke,

F i g. 2 the partial longitudinal section through a pneumatic impact tool during the return stroke, but without a handle and the

3 and 4 enlarged partial cross-sections according to circle A of FIG. 1 and 2.

In the embodiment according to FIG. 1 becomes the ball 1 in a known manner by pressing it down of the valve pin 2 is lifted from its seat 4 by the pusher 3, and the compressed air flows through it the bore 5 into the rupture space 6 and from here through bores 7 and acts on the piston 8.

According to the invention, compressed air flows at the same time from the annular space 6 into the storage channel 9 the bore 10 in the annular space 11 of the control slide 12. If the piston 8 flies over the bores 13 and 14, the compressed air flows from the annular space 11 through bores 15, 16, 13 and 14 into the cylinder space 15 a and fills the expanded air in this to normal pressure, and the piston receives an additional charge.

By reversing the control slide 12 to the return stroke, as shown in FIG. 2 shows the control edge closes 17 of the control slide 12, the bores 10 and 15, and no more building impact can take place. the Bores 13 and 14 can be distributed over the cubic capacity, but the bore 14 must be so high lie that the piston 8 closes the same in its upper end position.

Claims (3)

Patent claims: 1. A method for operating a pneumatic breaker, characterized in that that the compressed air expanding during the stroke stroke in the cylinder space (15 a) 409 760/23 is filled to the respective normal pressure by one or more additional compressed air connections (13/14) opening into the cylinder chamber in the stroke stroke direction, the additional compressed air connections (13/14) being connected to the main inlet line (6) of the compressed air. 2. Pick-up hammer for performing the method according to claim 1, characterized in that the actual compressed air inlet bore ao (6/5) is in communication with a storage channel (9) provided in the cylinder wall, which is connected via an annular channel (11) of the control slide (12) is connected to a second channel (16) arranged in the cylinder wall, from which one or more additional inlet ports (13/14) lead into the cylinder space (15 a). 3. Pick hammer according to claim 2, dadüreji marked that def for filling de & Cylinder chamber (15 a) serving control process by means of the lowest stage of the control slide (12) can be controlled through the annular channel (11). Considered publications:
German Patent No. 804 188;
"Der Bergbau" magazine, 1931, p. 220. 1 sheet of drawings 409 760/29 12.64 © Bundesdruckerei Berlin