SU439599A1 - Hydropneumatic hand hammer - Google Patents

Description

The invention is intended for the mechanization of manual labor in the mining, shipbuilding, construction and other industries. Hand hammers with pneumatic or hydraulic percussion mechanisms are known, including a housing, a stepped hammer and a hammer, a valve with unbalanced surfaces and a radial channel, an accumulator, an intermediate one, a working and idling speed of the chamber, supply and discharge lines. Known pneumatic hammers have a low efficiency, a HIGH noise level and continuous vibration during work, which adversely affects the health of workers, as well as the large weight and low durability of parts. The aim of the invention is to increase the efficiency of the hammer. This is achieved in that a step cavity is made in the case of the described hydropneumatic hand hammer between the working chamber and the battery, and a distributor is installed in it, which, on the one hand, together with the battery, forms a cavity communicating through the spool with the supply line, and on the other the sides have an intermediate chamber and supply and discharge lines. In the drawing, the schematic diagram of the described hammer is given, the floor: e 1 parts at the end of idling of the firing pin. Under the pressure of the fluid, a stepped piston-hammer 2 moves back and forth in the housing / hydropneumatic hand hammer, which strikes BUT the tool shank 3. The cylinder in which the drummer moves is equipped with three cameras: an idling chamber 4, an intermediate chamber 5 and a working stroke chamber 6. The idling chamber 4 is permanently connected to the supply line 7, the intermediate chamber 5 consists of three cavities A, Bn B E of the stepped bore of the casing between the working stroke chamber 6 and the membrane accumulator 8, a distributor 9 is installed, made with radial channels a and unbalanced end surfaces forming a larger section cavity G of a larger section, connected channel b m with an average cavity of the intermediate chamber B, and D smaller cavity section formed integrally with the hydraulic accumulator cavity E. The cavity D is connected by a channel in with the working stroke chamber, and the cavity E is connected with the extreme cavity of the control chamber 10, in which the spool // and spring 12 are placed, together with the handle 13, to start and stop the hammer.

The middle cavity G of the control chamber 10 is connected by channel d to the supply line 7, and the extreme cavity 3 is connected to the drain line 14. The supply line 7 is connected, moreover, to the cavity B of the intermediate chamber 5, and Slivia 14 to the L volume of the intermediate “Amer and the cavity I of the distributor, periodically connected through the channel of the distributor, radial e and axial channels in the housing / with the working stroke chamber.

When pressing the handle 13 of the hammer, the valve 11 moves to the left, connecting the cavity / from chamber 10 with cavity Ж and supply line 7. Fluid enters channel g into hydraulic chamber E of accumulator 8, compressing gas in it. At the same time, the liquid flows through the supply line into the cavity B. of the intermediate chamber and through the channel b into the cavity G of a larger cross section of the distributor 9, keeping the latter due to unreliable ejection of the ends in the rightmost position. At the same time, the working stroke chamber 6 is connected through the axial g and the radial e channels of the housing with the distributor channel and the drain line M. The pressure in it drops, and the impactor moves back to a smaller area in the reverse chamber 4, displacing the piston from chambers 6. During the return stroke, the striker 2 cuts off the middle cavity B from cavity B with the supply line 7 and connects it to the extreme cavity A and the drain magastral. The pressure in the cavity D of the distributor connected by channel b to the middle cavity B of the intermediate chamber drops, and the distributor under pressure of the liquid in the chamber E of the battery moves to the left, connected to cavity E, cavity D of a smaller section and with it

camera 6 working stroke. Since the cross section of the impactor in the working stroke chamber 6 is much larger than the working cross section in the reverse travel chamber 4, its instantaneous braking occurs and the working stroke begins. At the end of the stroke, the impactor strikes the tool shank 5 and simultaneously connects the middle cavity B and sweep the weft chamber with cavity C, supply line 7 and cavity G of a larger distributor section. The distributor is moved to the right due to the inadequacy of the end faces, the working chamber 6 is connected to the drain and the cycle is repeated.

The hammer is turned off from the worker by relieving the force from the handle 13. At the same time, prullsina 12 includes: the valve // to the right, the compartment G and the supply line from the cavity / C and connect them through the cavity 5 to the drain line.

Subject invention

Hydropneumatic hand hammer, including body, stepped piston-hammer, battery, distributor in the form of a sleeve with unbalanced surfaces and a radial channel, intermediate, working and idling of the chamber, supplying and discharging lines, characterized in its efficiency, a step cavity is made in the housing of the melada by the camera of the working stroke and the battery, and a distributor is installed in it, which on the one side together with the battery forms a cavity A spool valve with an inlet line, and on the other hand, with a slurry chamber and inlet and outlet lines.

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