SU1701511A2 - Percussion drilling machine - Google Patents

Description

one

(61) 1384367

(21) 4615328/28

(22) 02.12.88

(46) 12/30/91. Bul № 48 (75) D.A. Janus

(53) 621.883 (088.8)

(56) USSR author's certificate

No. 1384367, cl. B 25 B 21/02, 1986 /

(54) IMPACT DRILLING MACHINE

(57) The invention relates to a handheld power tool. The purpose of the invention is to increase productivity by ensuring quick replacement of parts of the percussion mechanism. Before starting work, the anvil is selected

10 with the required number of working cams 11. Then the hammer 13 is moved to the side of the drive 2 until the flats 23 are visible. At the same time, the spring 12 is compressed and the anvil 10 is mounted on the spindle 9 so that the flats enter its through radial groove 23, and the anvil was coaxial with the spindle 9. After that

the hammer 13 is released, which under the action of the spring 12 together with the anvil 10 returns to its original position. The anvil 10 is mounted on the reverse cone 21. After that, the percussion-drilling raspberries, together with the working tool, are brought to the work surface and the drive is activated. The rotation of the output shaft 3 through the cone 4, the intermediate shaft 5 is transmitted to the spindle 9 and the working tool installed in the latter. Wherein . drummer 13 does not rotate. Together with the spindle 9, the anvil 10 also rotates, and its working cams 11, interacting with the working cams 14 of the striker 13, overcoming the force of the spring 12, move the striker 13 towards the drive 2 and slip relative to the working cams 14, after which the striker 13 under the action of the spring 12 moves toward the anvil 10 and strikes at the last blow that is transmitted to the working tool. 2 Il.

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The invention relates to a handheld mechanized tool, can be used in various industries in the manufacture of construction and installation works and is an improvement of the invention according to the author. No. 1384367.

The purpose of the invention is to increase the productivity by ensuring quick replacement of the parts of the impact mechanism.

FIG. 1 shows a shock-drill-, l | shna machine, longitudinal section; in fig. 2 is a view along arrow A in FIG. one.

The impact drilling machine comprises a housing 1s located therein a drive 2 with an output shaft 3 having at the end 4, an intermediate shaft 5 mounted on the latter with a central bore 6, a diametrical groove 7 and a collar B at the end placed in the central bore 6 intermediate - shaft 5 with the possibility of joint rotation and relative axial displacement of spindle 9, spanning. spindle 9 of the anvil 10 with working cams 11 and spring loaded in the direction of the anvil 10 by a spring 12 of a drummer 13 with working cams 14, placed on its end face.

In the anvil 10 there is a central no cone aperture 15, a through radial groove 16, an annular groove 17 located at the end, facing the striker 13, evenly spaced around the circumference radial otsepcTHH 18 and annular groove 19 located on the outer cylindrical surface and communicated with radial holes 18. In the radial holes 18 there are working cams 11, made in the shape of a finger. A spring ring 20 is installed in the annular groove 19. The working cams 11 can be made in one piece with the anvil 10. At one end, spindle 9 has an inverse cone 21, an anvil 10 that responds to a conical hole 15, a diametrical hole 22 on the other, and two diametrically located flats 23g, each of which is equal to or greater than anvil height 10, between them, measured at the norm of a pc, is equal to or less than the width of the through radial groove 16 of the anvil Y. A pin 24 is installed in the diametral hole 22 of the spindle 9, the ends of which

: are located in the diametrical groove 7 of the intermediate shaft 5. The drummer 13 is mounted in the housing 1 with the possibility of axial movement.

Works percussion-drilling machine as follows.

Before starting the drilling and drilling machine, depending on the mode of operation (the number of strokes per spindle revolution), select the anvil 10 with the required number of working cams 11. After that, the drummer 13 is moved to the drive side 2, while compressing the spring 12, and setting the anvil 10 on the spindle 9 so that the flats 23 of the spindle 9 enter the through-4- radial groove 16 of the anvil 10, fa last become coaxial with the spindle 9. Then the drummer 13 is released, which under the action of the spring 12 moves to its original position and simultaneously sprays the anvil 10, which is mounted on the reverse cone 21. After that, the percussion drilling machine together with the tool installed in spindle 9 (not shown) is guided to the work surface or product and turns on the drive 2. Rotation of the drive 2 through its output shaft 3 and the cone 4 is transferred to the intermediate room 5 and further to the spindle 9 with the tool. Together with the spindle, the anvil 10 also rotates, and the striker 13 remains stationary. In the process of rotation of the anvil 10, its working cams 11 periodically interact with the working cams 14 of the striker 13 and, overcoming the force of the spring 12, move the striker 13 towards the drive 2. As soon as the working cams 11 are fully displaced relative to the working cushions 14 of the striker 13, the latter, under the action of the spring 12, begins to move rapidly towards the anvil 10 and transfers the filled energy in the form of a shock pulse to it, which is then transmitted through the spindle 9 to the working tool and then to the work surface or product. Shock pulses are transmitted until drive 2 is turned off.

Claims (1)

Invention Formula Shock drilling machine auth.St. No. 1384367, characterized in that, in order to increase productivity, a through radial groove is made in the anvil, and on the outer surface of the spindle there are two diametrically placed flats along its axis, the length of each of which is equal to or more than the height of the anvil, and the distance between them, measured by Hoji- | Mali, equal to or less than the width of the radial groove of the anvil. viewA sixteen Schig.2