SU855173A1

SU855173A1 - Immersible pneumatic striker

Info

Publication number: SU855173A1
Application number: SU752184258A
Authority: SU
Inventors: Альберт Александрович Моржаретто; Владимир Спиридонович Блохин; Михаил Семенович Зарубин
Original assignee: Институт горного дела Министерства черной металлургии СССР; Старооскольский Механический Завод
Priority date: 1975-10-27
Filing date: 1975-10-27
Publication date: 1981-08-15

Description

(54) ПОГРУЖНОЙ ПНЕВМОУДАРНИК(54) SUBMERGED PNEUMATIC DUMP

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Изобретение относитс к буровым инструментам ударно-поворотного действи , в которых передача крут щего момента осуществл етс с помощью тел качени .The invention relates to drilling tools of a rotary percussion action in which torque is transmitted using rolling bodies.

Известен нкевмоударник, при работе которого крут щий момент передаетс коронке с помощью тел качени , причем букса выполнена с наклонными пазами 1.A hammer drill is known, during operation of which the torque is transmitted to the crown by means of rolling elements, with the axle box made with inclined grooves 1.

Известны также погружные пневмоударники , включающие корпус, выполненный с камерой холостого хода, в которой размещен ударник, буксу, в гнездах которой размещены тела качени , и буровую коронку, хвостовик которой посредством выполненных в нем пазов подвижно закреплен в буксе (2). Недостатком этих пневмоударников вл етс невысокий срок их службы.Also known are submersible pneumatic impactors, including a body made with an idling chamber in which the hammer is placed, a bush, in the sockets of which are rolling bodies, and a drill bit, the shank of which is movably fixed in the bush (2). The disadvantage of these hammers is their short service life.

Цель изобретени - повыщение срока службы пневмоударника за счет его остановки при отходе буровой коронки от забо .The purpose of the invention is to increase the service life of an air hammer by stopping it when the drill bit moves away from the bottom.

Поставленна цель достигаетс тем, что в пневмоударнике, включающем корпус, выполненный с камерой холостого хода, в которой размещен ударник, буксу, в гнездах которой размещены тела качени , и буровую коронку, хвостовик которой посредством выполненных в нем пазов подвижно закрепленThe goal is achieved by the fact that in an air hammer, including a body made with an idling chamber, in which a hammer is placed, a bush, in the sockets of which are rolling bodies, and a drill bit, the shaft of which is movably fixed by means of grooves in it.

в буксе, хвостовик выполнен с прорез ми, смещенными по окружности относительно пазов , а букса выполнена со сквозными отверсти ми , которые в крайнем нижнем положении буровой коронки соедин ютс с камерой холостого хода через прорези.in the bush, the shank is made with slots offset circumferentially with respect to the grooves, and the bush is made with through-holes, which in the lowest position of the drill bit are connected to the idle chamber through the slots.

На фиг. 1 показан пневмоударник, продольный разрез; на ф«г. 2 - разрез А-А на фиг. 1, показывающий размещение пазов; на фиг. 3 - разрез Б-Б на фиг. I, показывающий размещение тел качени и сквозных отверстий .FIG. 1 shows a hammer, a longitudinal section; on f “g. 2 shows section A-A in FIG. 1 showing the placement of the slots; in fig. 3 shows a section BB in FIG. I showing the placement of rolling elements and through holes.

Погружной пневмоударник состоит из головной части коронки I. соединенной с хвостовиком 2 посредством резьбы, буксы 3 пневмоударника . Хвостовик выполнен с прорез ми 4 дл соединени в крайнем нижнем по5 ложении с отверсти ми 5. В буксе дл размещени тел 6 качени выполнены гнезда. В хвостовике дл подвижного соединени с буксой выполнены пазы 7.Submersible pneumatic hammer consists of the head of the crown I. connected to the shank 2 by means of a thread, axle box 3 pneumatic hammer. The shank is made with slots 4 for connection in the extreme lower position with openings 5. In the bush for accommodating the rolling bodies 6, sockets are made. Grooves 7 are made in the shank for the mobile connection with the bush.

Пневмоударннк работает следующим образом .Pneumatic shock works as follows.

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Claims

During drilling under the action of a static load, the pneumatic hammer is pressed against the bearing surface, and the end of its tail 2 is struck. The crown 1 in the letterbox is held by the rolling bodies 6, and in the axial direction it can freely mix for a predetermined blocking stroke until the slots 4 are aligned with the holes 5. The hammer is locked (the connection of the hammer return chamber with the atmosphere in the hovering position of the crown) is performed 4 and holes 5. The torque of the crown I is transmitted through the rolling bodies 6, which are placed in the blind box slots 3 and the slots 7. The assembly of the hammer for this unit is performed as follows zom. . Rolling bodies 6 inserted | And in the blind nests of the axle box 3, through the barrel of the hammer in the bush 3, the shank 2 is inserted and the head of the crown 1 is attached. Disassembly is performed in the reverse order. The use of crowns with the proposed shape of the shank contributes to increase their reliability and efficiency, by simplifying the design. Claims of the invention A submersible pneumatic hammer, comprising a housing made with an idling chamber, in which a drummer is placed, a box in its nests accommodates rolling bodies, and a drill bit, the shank of which is fixed by means of grooves made in it, characterized in that the service life of a pneumatic impact hammer due to its stoppage when the drill bit moves away from the bottom, the shank is made with slots offset circumferentially with respect to the grooves, and the bush is made with through holes ynem lower position of the drill bit are connected to the chamber through the slits of idling. Sources of information taken into account during the examination 1. USSR author's certificate No. 394534, cl. E 21 C 3/24, 1972.

2. USSR author's certificate number 219489, cl. E 21 V 1/06, 1968 (prototype).