SU916241A1 - Rotary division table - Google Patents

Description

The invention relates to machine tools and can be used in rotary-dividing devices.

Known rotary-dividing table containing a faceplate with a dividing disc, the grooves of which are beveled on one side, a worm gear pair connected with a reversible rotational drive, the worm of which is spring-loaded in the axial direction, and spring-loaded in the direction of the plate wedge retainer [1].

However, this rotary-dividing table does not have a sufficiently high reliability and accuracy of fixation.

The purpose of the invention is to improve the reliability of fixation and accuracy of division. _m

This goal is achieved by the fact that the rotational drive is equipped with an additional worm pair, the worm and the worm wheel of which is rigidly closed

Replenished respectively on the worm wheel of the main worm pair and on the faceplate.

The drawing shows the kinematic diagram of the rotary-dividing table. .

The rotary-dividing table consists of a faceplate installed in bulk 2, with a fixed worm ¹ wheel 3 coupled to a worm 4 located on the shaft 5. The worm wheel 6 is in view with a worm 7 moving along its axis, one end of which rests on the spring 9, and the other end is limited from axial movement by the thrust bearing 10.

The shaft 8 through the clutch 11 is connected with a reversible electric motor 12. The movable worm 7 interacts with the lever 13, acting on the limit switch.

The mechanism for fixing the faceplate 1 is made in the form of a separating disk 14,

3,916,241

rigidly fastened at the bottom of the faceplate 1, a spring-loaded wedge clamp 15 "entering into the grooves of the separating disc 14, which is chamfered on one side 14. Spring-loaded clamp 15 $

acts on the lever 16 associated with the limit switch.

Through the hollow shaft 2 passes the rod of the hydraulic cylinder, pressing the faceplate to the body and securing the machined parts.

Rotary-dividing table works as follows.

Torque from the motor 12 is transmitted to the worm 7. Worms-35 wheels 6 and 3 are fixed, as the faceplate; G pursed to the body. The worm 7, rotating, is screwed in until it stops at the bearing 10. The worm wheel 6, shaft 5 and ₂ about worm wheel 3, which is coupled with the worm and face 1, rotates. the next groove is deli. The driver disk 14 turns on the limit switch, which gives the command to reverse the engine. During the reverse rotation of the faceplate, the dividing disk 14 abuts against the retainer and the shaft ₃₀ 2 stops. The worm 7, continuing to rotate relative to the fixed wheel 6, begins to unscrew, compressing the spring 9. At the end of the stroke, the worm 7 presses the lever 13 "acting on the limit switch, the command to stop the engine is given. .

four

The use of a drive consisting of two worm gears, one of which is leading and made with a movable worm, allows to increase the reliability of fixation. The worm 4 when pressing the separating disk 14 to the latch 15 works as a self-braking screw. ¹ A rigid worm-wheel-disk-clamp system is formed, with a torque generated by a spring, a worm and a worm wheel applied to the worm.

Claims (1)

Claim Rotary-dividing table containing a faceplate with a dividing disc, the grooves of which are chamfered on one side, a worm gear pair connected with a reversible rotational drive, the worm of which is spring-loaded in the axial direction, and spring-loaded in the direction perpendicular to the faceplate plane, a wedge lock, characterized in that In order to improve the reliability of fixing dividing accuracy, the rotational drive is provided with an additional worm pair, the worm and the worm wheel of which are rigidly fixed respectively on the worm wheel of the main worm pair and on the faceplate.