SU1199605A2 - Percussion-action tip for manual drilling machine - Google Patents

Abstract

SHOCK ACTION FOR MANUAL BORING MACHINE by author. St. No. 575215, characterized in that, in order to increase durability and reliability, it is provided with an additional spring concentrically located relative to the main one with a gap, one end of which is also fixed on the rear cover and the other on the hammer, and having the opposite core. § CO QD Od O cl

Description

The invention relates to manual mechanized tools, can be used when drilling holes in structures made of building materials, and is an improvement of the impact nozzle for a manual drilling machine according to ed. St. No. 575215.

The purpose of the invention is to increase durability and reliability.

In FIG. 1 shows a nozzle, a longitudinal section, in FIG. 2 is a diagram of an arrangement of springs with respect to one another and their ends.

The nozzle comprises a housing 1 with front 2 and rear 3 covers screwed into it. On the ball-bearing support 4, located in the cover 3, the drive shaft 5 is installed, the shank 6 of which is clamped in the chuck of the drilling machine (not shown). The rear end of the spindle 7 is mounted in the cavity of the drive shaft with the possibility of axial movement and joint rotation. The drive shaft 5 and the spindle 7 are fastened with a key 8. The spindle 7, to which a drill chuck (not shown) is connected, is based on a ball bearing 9. On the spindle 7 the anvil 10 with end cams 11 is strengthened. The spindle 7 is axially spring-loaded relative to the bearing 9 by the springs 12.

On the back cover 3, with the help of the main spring 13 and an additional spring 14 with reverse winding concentrically arranged with a radial clearance, the hammer 15 is provided with end cams 16,

1199605 ² facing the cams 11 of the anvil 10. The ends of the turns of both springs 13 and 14 are fixed on the transverse axes to the sides opposite to 5 from the longitudinal axis and make an angle of 180 ° in plan.

Drummer 15 is installed in the housing

I freely with a gap relative to the housing 1 and passing through its inner hole of the spindle 7.

The nozzle works as follows.

The torque from the drilling machine through the shank 6 is transmitted 15 to the drive shaft 5 and then through the key 8 of the spindle 7, on which the tool is mounted. While the cams

II anvil 10, interacting with the cams 16 of the striker 15, cock ^{it with} periodic pulses. The drummer 15 cannot rotate, since it is fixed to the housing 1 by means of the main spring 13 and an additional spring 14 with reverse winding concentrically located with a radial gap 25. Returning to its original position in the periods between strokes, the striker 15 periodically acts on the anvil 10 and, therefore, on the working tool.

In the periods between strokes, the striker 15 makes axial movement due to the suspended position on the springs 13 and 14, while it does not contact the housing 1 and the spindle 7, and ^{35 the} reactive pulse of the main spring 13 is suppressed due to the additional spring 14 with reverse winding of the coils.

Next, the cycle repeats.

Figure 2

VNIIIPI Order 7774/20

Circulation 1049 Subscription

Branch of PPP Patent ”

Uzhhorod, Project 4,

Claims (1)

NOZZLE OF SHOCK ACTION FOR HAND DRILLING MACHINE by ed. St. No. 575215, characterized in that, in order to increase durability and reliability, it is equipped with an additional spring concentrically located relative to the main one with a gap, one end of which is also fixed on the back cover and the other on the hammer, and having a winding opposite the main . Fig!