SU1252562A1 - Percussion pneumatic cylinder - Google Patents

Description

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The invention relates to mechanical engineering and can be used in mechanisms of percussive action.

The aim of the invention is to increase efficiency by increasing the impact energy.

The drawing shows the impact pneumoschindry, section.

The pneumatic cylinder contains a piston 1 with a rod 2 mounted in the housing 3 to form piston A and rod 5 cavities, and a cover 6 with an accumulating cavity 7. The cavity 7 communicates with the piston cavity 4 by an opening 8. In the piston 1, an axial channel 9 is made to communicate the piston cavity 4 with a cavity 10 of the rod 2 and through the hole 11 with a cavity (not indicated) of the piston 1. Differential piston 12 divides the cavity of piston 1 into two stages 13 and 14. Larger stage 14 is connected by holes 15 with cavity 4, and lower stage 13 is connected with cavity 10 of rod 2. On piston 12 and on internal surface of piston 1 the elastic diaphragm 16 is fixed. The intermediate space 17 between the diaphragm 16 and the piston 1 is in communication with the rod cavity 5 via a non-return valve 18. The elastic washer 19 serves to seal the piston cavity 4 during the charging of the cavities 7 and 10.

Impact Pneumatic cylinder works as follows.

252562J

In the initial position, the accumulating cavity 7 communicated with the piston cavity 4 communicates with the atmosphere. In the rod cavity 5 is supplied compressed

5, the air which brings the piston 1 to the extreme upper position against the stop with an elastic washer 19. Then the compressed air is supplied to the storage cavity 7, and through the opening 8 to the

 About the cavity 10 of the piston rod 2 and to the smaller stage 13 of the cavity of the piston 1. From the pressure of compressed air, the differential piston 12, moving towards the larger stage 14 of the cavity of the piston 1,

15 stretches the elastic diaphragm 16.

When a certain pressure is reached in the accumulating cavity 7, pressure is released in the rod

the cavity 5 and the piston 1 with the rod 2 rush down. When depressurization of the piston cavity 4, the pressure of compressed air in a larger stage 14 of the piston 1 cavity on the piston 12

more than on the side of the lower stage 13 due to the difference in the cross-sectional areas of the stages 13 and 14 of the cavity of the piston 1. Therefore, the piston 12 displaces the compressed air from the smaller

stage 13, creating an additional repulsive force.

Possible air leaks through the seals of the piston 12 from the intermediate space 17 are diverted by a check valve 18 into the rod cavity 5.

14- 15 Ю 9 8

Editor A, Shandor

Compiled by Z. Pimahova Tehred E. Chizhmar

Order A608 / 38

Circulation 610 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader E. Sirohman

Claims (2)

1. SHOCK PNEUMOCYLINDER containing a hollow piston with a rod installed in the housing with the formation of the piston and rod cavities, and a cover fixed to the housing with the formation of the last accumulating cavity, communicated axial bore with the piston cavity, and the cavity in the piston and rod are interconnected and through an axial channel with a piston cavity, characterized in that, in order to increase the efficiency by increasing the impact energy, it is equipped with a differential piston installed in the piston cavity, made stepwise, and m the lower stage of the cavity is connected with the cavity of the rod, and the larger stage is in communication with the piston cavity through additional holes made in the piston. 2. The pneumatic cylinder according to claim 1, characterized in that the differential piston is equipped with an annular elastic diaphragm fixed along the inner perimeter on the differential piston from the side of its larger stage, and along the outer perimeter. - on the inner surface of the piston with a rod. SU „1252562