SU1514508A1 - Hand drilling machine - Google Patents

Description

The invention relates to mechanical engineering, in particular to a handheld mechanized tool for drilling. The purpose of the invention is the expansion of the technological capabilities of the manual machine due to the provision of vibration drilling with forced crushing of chips. Manual drilling machine includes body 1, in which a two-stage precession is placed

the transmission and tool spindle / 8, on the outer surface of which there is a threadless thread 10 and splines 11. Rotation from the drive through the inclined end of the disk 2 is converted into precessional motion of the satellite wheelbase unit 3 · The gear rims of the satellite wheelblock unit 3 engage with the teeth of the fixed wheel 6, and on the other hand, with the teeth of the driven wheel 7. As a result, the spindle 8 associated with the driven wheel 7 will rotate with reduction. In the process of precessional movement, the turns of the threadless thread 9 of the satellite wheel block 3 engage with the turns of the threadless thread 10, causing the tool spindle 8 to perform a vibration motion with a frequency equal to the drive rotation frequency and with amplitude A. The tool simultaneously performs a rotational motion with reduction ΐ and vibratory motion with drive rotation frequency and amplitude A. 1 Il.

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1514508 A1

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The invention relates to mechanical engineering, in particular to a handheld mechanized tool for drilling, and can be used for drilling materials 5, where considerable axial forces are required for cutting tools and forced shavings of chips.

The purpose of the invention is to expand the technological capabilities of the drilling machine by providing vibration drilling with forced crushing, chips.

The drawing shows a manual boring machine, general view.

The hand-held drilling machine comprises a housing 1 with a handle, an electric motor (not shown) placed therein, on whose shaft a disk 2, 20 is mounted

interacting with its inclined end with a satellite block of wheels 3 of a two-stage precession gear, with gear rims 4 and 5. On one side of the satellite block, gear 25, gear 3 has a gear 6 of the precession gear rigidly connected to housing 1, and on the other hand, a driven gear wheel 7 precession transmission. This gear 30 provides for the engagement of 100% of the teeth 'pairs at the same time. The inner spherical surface of the satellite wheel unit 3 is made with an eccentricity with respect to the axis of the tool spindle 8 and is made with a threadless thread 9, which interacts with the turns also threadless 10, made on the outer surface of the spindle 8. The spindle 8 is connected with the driven gear wheel 7 by splines 11. On the spindle 8 is installed tool chuck 12.

Manual drilling machine works as follows.

I

The rotation from the electric motor through the inclined end of the disk 2 is converted into a precessional motion of the satellite unit of wheels 3, the gear rims of which engage on the one side with the teeth of the stationary wheel 6, and on the other side - with the teeth of the driven wheel 7 · As a result, driven by wheel 7, spindle 8 rotates with reduction

£ _ ___ ± wor DH ____

“2tsΖ ₇ '

where Ζ ₄ , Ζ _ε is the number of teeth of the crowns of the satellite wheel block, ₆ , Ζ ₇ is the number of teeth of the wheels 6 and 7, respectively.

. As a result of the precessional movement

the satellite wheel block with 3 turns of thread 9 partially engages with the turn of thread 10 of the instrumental spin 8, forcing the latter to make a vibration motion with a frequency equal to the rotation frequency of the motor shaft and with amplitude A = xyu,

where K is the average radius of the screw thread, is the precession angle (angle of inclination of the satellite wheel unit). Thus, the tool makes a rotational movement with reduction одновремен with simultaneous vibration movement with the frequency of rotation of the electric motor shaft and amplitude A. At the same time, the impulse supply of torque to the tool provides an intensification of the drilling process of both fragile non-metallic materials and metals by vibro-drilling with forced fragmentation of chips.

Claims (1)

Claim Manual drilling machine, comprising a housing with a handle, a drive with a gearbox and a tool spindle, characterized in that, in order to expand technological capabilities, the gearbox is designed as a precessional two-stage transmission covering the tool spindle, the inner surface of the satellite wheel unit of which is eccentric relative to the axis of the tool spindle and on it is made a threadless thread, pre-50 assigned to interact with the tool spindle, n outer surface which thread made mating bezzahodnaya and slots through which the tool spindle is connected with the driven gear precessional transmission.