SU1256951A1 - Percussive drilling attachment for hand-held tools - Google Patents

Description

The invention relates to hand-held portable impact-rotating tools and can be used to produce holes in concrete and stone in the construction of houses and renovation of apartments.

The purpose of the invention is to increase durability by changing the nature of the functional relationship between the hammer and the spindle.

FIG. Figure 1 shows the impact drill bit attached to the working tool with the sleeve 18.

Shock drilling head works in the following way.

When the motor is turned on (not shown 5), its shaft 5 turns up part 12 of the spindle. The face spiral cam 4 interacts with the stop b fixed on the drummer 2, and cocks the latter, squeezing the spring 3 through the thrust washer 7. Once the nozzle is attached to the hand tool, the time rotation is transmitted and parts 13 are

rez; in fig. 2 is a section A-A in FIG.

The impact drill bit of a hand tool comprises a housing 1, a hammer located therein, a spring 3 acting on it and a spindle with a cam

spindle. At the end of the cocking of the impactor 2, its stop 6 approaches the notch 11. Under the action of the energy of the compressed spring 3, the impactor 2 moves along the axis, striking the anvil 9. As a result of the impact, part 13

4, connected to the shaft 5 of the electric motor 15, the spindle moves along an axis of benefit (not shown). Shock drilling drill with the presence of a guide 10 and extended with a stop 6 fixed on the hammer 2 and in contact with the cam 4, a thrust washer 7 placed on the end 8 of the hammer 2 facing the shaft 5 of the electric motor, and interacting with the spring 3, the anvil 9 and directed 10, rigidly connected to the spindle. The cam 4 is made with a spiral end and has a notch 11 for the passage of the stop 6 through it,

14, with further rotation of part 12 of the spindle, the end helical cam 4 picks up the stop 6, whereby the hammer 2 is reintroduced and the cycle repeats. This is how percussion drilling of holes is carried out.

When drilling, the part 13 of the spindle always rises to the part 12 due to the spindle - from 25 intersected tools to each other by the operator. If the two parts 12 and 13. In part 13, the lard is not pressed to the bottom of the hole and rotates freely, then the impact energy is absorbed by an elastic shock absorber 16. If you turn the threaded pin 17 out of the housing 1, only drilling without a longitudinal pin 15 occurs. The casing 1 houses 30 strokes of shock, and the shock-drilling nozzle, a shock absorber 16 and a threaded rod, 17. plays the role of a safety clutch.

The cases are made with longitudinal grooves 14, in which the coupling parts 12 and 13 of the shchpindel are installed with the possibility of movement, made in the form of a smooth cylindrical

The impact drill attachment is attached to the working tool with a clutch 18.

Shock drilling head works in the following way.

When the motor is turned on (not shown), its shaft 5 turns up part 12 of the spindle. The face spiral cam 4 interacts with the stop b fixed on the drummer 2, and cocks the latter, squeezing the spring 3 through the thrust washer 7. At the same time, the rotation is transmitted and parts 13

spindle. At the end of the cocking of the impactor 2, its stop 6 approaches the notch 11. Under the action of the energy of the compressed spring 3, the impactor 2 moves along the axis, striking the anvil 9. As a result of the impact, part 13

 the spindle moves along the axis due to the presence of the guide 10 and the longitudinal grooves 14. With further rotation of the part 12 of the spindle, the end helical cam 4 picks up the stop 6, thereby re-inserting the hammer 2, and the cycle repeats. This is how percussion drilling of holes is carried out.

Phage.2

Claims (1)

SHOCK-DRILLING HANDLE FOR HAND TOOLS, comprising a housing, a hammer located in it, a spring acting on it and a spindle with a cam connected to the motor shaft, characterized in that, in order to increase durability, it is equipped with a stop fixed to the hammer and in contact with cam, thrust washer located on the end face of the hammer, facing the motor shaft, and interacting with the spring, anvil and guide, rigidly connected with the spindle, the cam is made of spiral end, and the spindle l - of two interconnected parts, one of which there are longitudinal grooves, which is movable connection of the two parts. 1256951 A1