SU436145A1 - - Google Patents

Description

I

This invention relates to the mining industry, in particular to submersible hammer hammers.

According to the main author. St. No. 219489 is known for a submersible pneumatic hammer for rock drilling, consisting of a barrel, a drill bit and a hammer, and the barrel of a hammer hammer is connected to the drill bit by means of rolling elements, such as balls, placed in the grooves of the shank of the crown and the jacks of the front part of the barrel. In addition, the front part of the hammer is equipped with an elastic centering ring.

The difference of the proposed submersible pneumatic hammer is that the longitudinal grooves on the shank of the crown are triangular in shape with different widths of the side surfaces, the smaller of which is in contact with the cylindrical surface of the rolling elements. This improves the reliability and service life of the joint.

The drawing shows the described pneumatic hammer in two projections.

The submersible pneumatic hammer includes the front part of the barrel 1, in which the rolling elements 3 (rollers) 3 in one, two or more rows are placed in the longitudinal windows 2. Three or four rollers are preferably located in one row. The cylindrical surface of the rollers 3, protruding from the windows 2 into the inner cylindrical surface of the barrel 1, contacts the smaller side of the triangular longitudinal grooves 4 of the shank of the crown 5, and the convex conical surface of the rollers contacts the holder 6, which prevents them from falling out of the slots. The lower row of rollers is included in the castle longitudinal triangular grooves 7, which do not have an exit at the end of the shank of the crown. With their help, the crown 5 is kept from falling out of the barrel 1, and for its installation and disassembly, transverse grooves 8 are made on the crown shank, through which the grooves 4 are connected to the grooves 7.

When transmitting a torque from the barrel 1 to the crown 5, the side surfaces of the longitudinal windows 2 linearly contact the cylindrical surface of the rollers 3 and through them linear rotation with the smaller side of the triangular grooves transmit rotational forces directly to the crown. In this case, the end surfaces of the rollers remain free from the action of any forces, since radial expansion forces are absent in the joint.

Subject invention

Submersible pneumatic hammer on bus. St. No. 219489, characterized in that, in order to increase the reliability and service life of the joint, the necrosis grooves on the crown tail are triangular in shape with different widths of the side surfaces, 4 of which are in contact with the cylindrical surface of the rolling bodies.

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