PL222388B1 - Rotary table - Google Patents

Description

The subject of the invention is a rotary table for continuous division of rotary devices used for setting the angular position of machine elements or workpieces.

Discrete partitioning methods in rotary devices are known. In these devices, preset positions are obtained by form joints, e.g. discs with a system of holes, multi-notches, splines, toothed elements.

Directly driven continuous angular subdivision devices or built on a mechanical transmission system are also known. The permissible load of the positioned element depends on the type of mechanical transmission, overall dimensions, geometry and material of its elements. Various types of worm gears or spur gears, also known as spiroidal gears, have been used in precision rotary tables. The worm gears used in rotary tables consist of a worm wheel that works with one or two screws. The spiroidal gears used in rotary tables consist of a cylindrical or conical worm which works with a spur or conical gearing.

The essence of the invention is a rotary table in the form of a spindle-disc mounted on rolling units and connected to the drive mechanism, characterized in that the spindle-disc drive mechanism is made of coaxial upper and lower spur gears with the teeth of the same inclination direction of the tooth line, connected to the drive mechanism. a spindle-disc, e.g. with a groove, as well as gear bolts and pins through distance sleeves, while between the upper toothing and the lower toothing there is a tooth spacer, where the upper cylindrical worm coils are meshed with the upper toothings, and the lower cylindrical worm coils are meshed with the lower toothings. Both screws have the same directions of the inclination of the coil line, are coupled to each other and are mounted in the body.

Thanks to the solution according to the invention, the following technical and operational effects were obtained:

- increasing the area of cooperation between the screw coils and the driven wheels, thanks to the simultaneous cooperation of two connected front teeth with two coupled cylindrical screws,

- the greatest durability and load capacity of the rotary table thanks to the increased surface area between the mating teeth of the mechanical transmission,

- the greatest durability thanks to the use of two toothing with the same directions of inclination of the teeth lines cooperating with the spiral of the screw each.

The invention, in an exemplary embodiment, has been shown in section in the drawing.

The table consists of a monolith of a spindle-disc 1. A bearing 2 is attached to the spindle-disc 1, acting as a rolling guide. The upper 6 and lower 8 teeth together with the distance sleeves 3, 4, 7 and the bearing ring 2 are attached to the spindle-disc 1 of the rotary table, for example by means of a groove 8 and by bolts 15 and screws 10 through the bearing rings 2. On the other side, the bed The bearing 2 is bolted to the body of the rotary table 11 with a screw 12. In the body of the table 11, two upper 5 and lower 9 cylindrical screws are mounted and coupled with each other, which cooperate with the upper 6 and lower spur gear teeth, respectively 8. Rotation of the shafts on which the threads of the upper 5 and lower 9 worms are cut, they are synchronized with a backlash-free transmission, for example with a belt transmission with a toothed belt not shown in the drawing.

The change of the angular position of the spindle-disc 1 is carried out by rotation of the coupled upper 5 and lower 9 worms, which, as a result of cooperation with the teeth of the two spur gears of the upper 6 and lower 8, connected to each other through the tooth spacing 7, for example by means of screws 15 and pins 13, causes their angular position to change. Rotation of the upper 6 and lower 8 frontal gearing, which are rigidly connected to the spindle-disc 1, changes its angular position. The angular change of the upper 5 and lower 9 cylindrical screws is controlled by a drive, not shown in the drawing.

Claims (1)

Patent claim A rotary table in the form of a spindle-disc mounted on rolling units and connected to the drive mechanism, characterized in that the spindle-disc drive mechanism (1) is The upper (6) and lower (8) spur gears located coaxially with the teeth with compatible tooth line inclination directions, positively connected with the spindle-disc (1), e.g. with a key (14) and screws (12) through a distance sleeve (7), with the upper (6) and lower (8) front teeth meshing with the coils of the upper (5) and lower (9) cylindrical worm, respectively, mounted in the body (11) and driven by a motor through a backlash-free transmission. Drawing PL 222 388 B1 Publishing Department of the PPO Price PLN 2.46 (including 23% VAT)